Designation: D5948 − 05 (Reapproved 2012)

Standard Specification for

Molding Compounds, Thermosetting1
This standard is issued under the fixed designation D5948; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the U.S. Department of Defense.

1. Scope* tivity (Dielectric Constant) of Solid Electrical Insulation

1.1 This specification covers the basic properties of thermo- D229 Test Methods for Rigid Sheet and Plate Materials
set molding compounds and the test methods used to establish Used for Electrical Insulation
the properties. D256 Test Methods for Determining the Izod Pendulum
Impact Resistance of Plastics
1.2 Classification—Molding thermosetting plastic com-
D495 Test Method for High-Voltage, Low-Current, Dry Arc
pounds shall be of the following resins and are covered by the
individual specification sheets (see 5.1 and Annex A1 – Annex Resistance of Solid Electrical Insulation
A8). D570 Test Method for Water Absorption of Plastics
D618 Practice for Conditioning Plastics for Testing
Resin
Phenolic, cellulose filled D638 Test Method for Tensile Properties of Plastics
Phenolic, mineral/glass filled D648 Test Method for Deflection Temperature of Plastics
Melamine
Polyester Under Flexural Load in the Edgewise Position
Diallyl iso-phthalate D695 Test Method for Compressive Properties of Rigid
Diallyl ortho-phthalate
Silicone
Plastics
Epoxy D790 Test Methods for Flexural Properties of Unreinforced
NOTE 1—There is no equivalent ISO standard. and Reinforced Plastics and Electrical Insulating Materi-
als
1.3 Order of Precedence—In the event of a conflict between
D796 Practice for Compression Molding Test Specimens of
the text of this specification and the references cited in Section
Phenolic Molding Compounds (Withdrawn 1992)3
2 (except for related specification sheets), the text of this
specification takes precedence. Nothing in this specification, D883 Terminology Relating to Plastics
however, supersedes applicable laws and regulations unless a D1896 Practice for Transfer Molding Test Specimens of
specific exemption has been obtained. Thermosetting Compounds
D3419 Practice for In-Line Screw-Injection Molding Test
1.4 The values stated in SI units are to be considered
Specimens From Thermosetting Compounds
standard.
D3636 Practice for Sampling and Judging Quality of Solid
2. Referenced Documents Electrical Insulating Materials
D3638 Test Method for Comparative Tracking Index of
2.1 ASTM Standards:2 Electrical Insulating Materials
D149 Test Method for Dielectric Breakdown Voltage and
D4350 Test Method for Corrosivity Index of Plastics and
Dielectric Strength of Solid Electrical Insulating Materials
Fillers
at Commercial Power Frequencies
D150 Test Methods for AC Loss Characteristics and Permit- D4697 Guide for Maintaining Test Methods in the User’s
Laboratory (Withdrawn 2009)3
E994 Guide for Calibration and Testing Laboratory Accredi-
1
This specification is under the jurisdiction of ASTM Committee D20 on tation Systems General Requirements for Operation and
Plastics and is the direct responsibility of Subcommittee D20.16 on Thermosetting Recognition (Withdrawn 2003)3
Materials. E1224 Guide for Categorizing Fields of Capability for Labo-
Current edition approved Oct. 1, 2012. Published November 2012. Originally
approved in 1996. Last previous edition approved in 2005 as D5948 - 05ε1. DOI: ratory Accreditation Purposes (Withdrawn 2002)3
10.1520/D5948-05R12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.

*A Summary of Changes section appears at the end of this standard

 D5948 − 05 (2012)
TABLE 1 Sampling and Conditioning for Mechanical/Physical Qualification Tests
NOTE 1—A50 % retention of initial flexural strength is required.
NOTE 2—The side of a test specimen is that area formed by the chase of the mold.
NOTE 3—The face of the test specimen is that area formed by the top or bottom force plug.
NOTE 4—When specified.
Property to Be Tested- ASTM Test Modified Specimens, Form, and Number Conditioning Procedure
Unit of Value
Mechanical/Physical Method by Dimension Tested (see Section 6)
Compressive strength, end- D695 ... 25.4 by 12.7 by 12.7 mm 5 E-48/50 + C-96 ⁄23 ⁄50 MPa (minimum average)
wise
Dimensional stability ... 7.2.1 127 bar, 12.7 by 12.7 mm 5 C-96/23/50 Percent (maximum average)
Flexural strength D790 7.2.2 127 bar, 6.4 by 12.7 mm 5 E-48/50 + C-96 ⁄23 ⁄50 MPa (minimum average)
Heat deflection temperature D648 7.2.3 127 bar, 12.7 by 12.7 mm 3 A Degrees Celsius (minimum
average)
Heat resistance (1) D790 7.2.4 127 bar, 6.4 by 12.7 mm 5 E-1/at designated tempera- Degrees Celsius (minimum
ture test. Test at tempera- average) at temperature
ture
Impact strength
Side (2) D256 ... As per Test Method D256 5 E-48/50 + C96 ⁄23 ⁄50 J/m notch (minimum average)
Face (3), (4) D256 ... As per Test Method D256 5 E-48/50 + C96 ⁄23 ⁄50 J/m notch (minimum average)
Tensile strength D638 ... As per Test Method D638 5 E-48/50 + C-96 ⁄23 ⁄50 MPa (minimum average)
Water absorption D570 7.2.5 51-mm disk, 3.2 mm thick 3 E-24/100 + des + D-48 ⁄50 Percent (maximum average)

2.2 Underwriters Laboratory Standard:4 the event of any conflict between the requirements of this
UL 94 Tests for Flammability of Plastic Materials for Parts specification and the material specification, the latter shall
in Devices and Appliances govern.
2.3 Other Standard: 5.2 Qualification—Molding compounds furnished under
DDC AD 297457 Procedure for Determining Toxicity of this specification shall be products which conform to the
Synthetic Compounds5 applicable material specification and quality assurance provi-
sions in this specification.
3. Terminology
5.3 Material Safety Data Sheet (MSDS)— The user shall be
3.1 For definitions of technical terms pertaining to plastics provided with a material safety data sheet.
used in this specification, refer to Terminology D883.
5.4 Uniformity—All molding compound of the same brand
3.2 Definitions of Terms Specific to This Standard: from one manufacturer shall be uniform in texture, in color,
3.2.1 batch—a homogeneous unit of finished molding com- and in the specified properties as determined by the batch-
pound manufactured at one time. acceptance inspection specified in 8.3.
3.2.2 heat resistance—the elevated temperature at which a 5.5 Property Values—Standard specimens of the compounds
particular material retains a minimum of 50 % of its original shall conform to the property values shown in the individual
flexural strength measured at 23°C. specification sheets for qualification (see 8.2) and batch accep-
tance (see 8.3).
4. Significance and Use
4.1 This specification is a revision of STD MIL-M-14H, 6. Conditioning
Specification for Molding Compound, Thermosetting, retain- 6.1 Standard test specimens shall be conditioned before
ing the MIL-M-14H material designations and property re- testing, as specified in Tables 1-4.
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quirements while conforming to ASTM form and style. It is 6.1.1 Nomenclature—The following letters shall be used to
intended for qualification and batch acceptance for materials indicate the respective general conditioning procedures:
used by government and industry, and is intended as a direct 6.1.1.1 Condition A—As received; no special conditioning.
replacement for MIL-M-14H. 6.1.1.2 Condition C—Humidity conditioning in accordance
with Practice D618.
5. Requirements 6.1.1.3 Condition D—Immersion conditioning in distilled
5.1 Specification Sheets—The individual item requirements water in accordance with Practice D618.
shall be as specified herein and in accordance with the 6.1.1.4 Condition E—Temperature conditioning in accor-
applicable specification sheet (see Annex A1 – Annex A8). In dance with Practice D618; Condition Desiccation–cooling over
silica gel or calcium chloride in a desiccator at 23°C for 16 to
20 h after temperature conditioning in accordance with Practice
4
Available from Underwriters Laboratories (UL), Corporate Progress, 333 D618.
Pfingsten Rd., Northbrook, IL 60062.
5
Available from National Technical Information Service (NTIS), U.S. Depart- 6.2 Designation—Conditioning procedures shall be desig-
ment of Commerce, 5285 Port Royal Rd., Springfield, VA 22161. nated as follows:
 D5948 − 05 (2012)
TABLE 2 Sampling and Conditioning for Electrical Qualification Tests
Property to Be Tested- ASTM Test Modified Specimens, Form, and Number Conditioning Procedure
Unit of Value
Mechanical/Physical Method by Dimension Tested (see Section 6)
Arc resistance D495 ... 102-mm disk, 3.17 mm thick 3 A seconds (minimum average)
Dielectric breakdown:
Short-time test D149 7.2.6 102-mm disk, 12.7 mm thick 1 E-48/50 + C-96 ⁄23 ⁄50 kilovolt (minimum average)
Step-by-step test 3 E-48/50 + C-96 ⁄23 ⁄50
Short-time test 1 E-48/50 + D-48 ⁄50
Step-by-step test 3 E-48/50 + D-48 ⁄50
Dielectric constant:
At 1 kHz D150 ... 51-mm disk, 3.2 mm thick 3 E-48/50 + des maximum average
3 E-48/50 + D-24 ⁄23
At 1 MHz 51-mm disk, 3.2 mm thick 3 E-48/50 + des
3 E-48/50 + D-24 ⁄23
Dielectric strength:
Short-time test D149 7.2.6 102-mm disk, 3.2 mm thick 3 E-48/50 + C-96 ⁄23 ⁄50 kV/mm (minimum
Step-by-step test 5 E-48/50 + C-96 ⁄23 ⁄50 average)
Short-time test 3 E-48/50 + D-48 ⁄50
Step-by-step test 5 E-48/50 + D-48 ⁄50
Dissipation factor:
At 1 kHz D150 ... 51-mm disk, 3.2 mm thick 3 E-48/50 + des maximum average
3 E-48/50 + D-24 ⁄23
At 1 MHz 51-mm disk, 3.2 mm thick 3 E-48/50 + des
3 E-48/50 + D-24 ⁄23
Surface resistance ... 7.2.7 102-mm disk, 3.2 mm thick 5 C-720/70/100 + dew megaohms (minimum individual)
Comparative track index D3638 7.2.8 51-mm disk, 3.2 mm thick 5 A volts
Volume resistance ... 7.2.7 102-mm disk, 3.2 mm thick 5 C-720/70/100 + dew megaohms (minimum individual)
Water extract conductance D4350 ... ... ... E-144/71 siemens per centimetre

TABLE 3 Sampling and Conditioning for Combustion Qualification Tests

Conditioning
Property to Be Tested- ASTM Test Modified Specimens, Form, Number
Procedure Unit of Value
Mechanical/Physical Method by and Dimension Tested
(see Section 6)
Flame resistance ignition time D229 7.2.9 127-mm bar, 12.7 by 5 A seconds (minimum average)
12.7 mm
Burning time seconds (maximum average)
Flammability UL 94 7.2.10 127-mm bar, 12.7-mm 5 A rating/thickness (1.6, 3.2, or
thickness 6.4 mm)
Toxicity when heated:
Carbon dioxide
Carbon monoxide
Ammonia
Aldehydes as HCHO
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Cyanide and HCN — 7.2.11 127-mm bar, 12.7 by 4 A parts per million (maximum
12.7 mm average)
Oxide of nitrogen as NO2
Hydrogen chloride

6.2.1 A capital letter indicating the general condition of the Condition C-96/23/50: Humidity condition, 96 h at 23 ± 1.1°C and 50 ±
specimen; that is, as-received, humidity, immersion, or tem- 2 % relative humidity.
Condition D-48/50: Immersion condition, 48 h at 50 ± 1°C.
perature conditioning. Condition E-48/50: Temperature condition, 48 h at 50 ± 3°C.
6.2.2 A number indicating the duration of the conditioning Condition E-48/50 +
in hours. C-96/23/50: Temperature condition, 48 h at 50± 3°C followed by
+ C-96 ⁄23 ⁄50 humidity condition, 96 h at 23 ±
6.2.3 A number indicating the conditioning temperature in 1.1°C and 50 ± 2 % relative humidity.
degrees Celsius.
6.2.4 A number indicating relative humidity, whenever rela- 7. Test Procedure
tive humidity is controlled. 7.1 Standard Test Specimens:
6.3 The numbers shall be separated from each other by slant 7.1.1 Number—The minimum number of standard test
marks and from the capital letter by a dash. A sequence of specimens to be tested is specified in Tables 1-4.
conditions shall be denoted by use of a plus sign ( + ) between 7.1.2 Form—The form of the standard test specimens shall
successive conditions. be as specified in the referenced ASTM test method or other
Examples: applicable test method.
 D5948 − 05 (2012)
TABLE 4 Sampling and Conditioning for Batch Acceptance Tests
NOTE 1—The side of a test specimen is that area formed by the chase of the mold.
Property to Be Tested- ASTM Test Modified Specimens, Form, Number Conditioning Procedure
Unit of Value
Mechanical/Physical Method by and Dimension Tested (see Section 6)
Arc resistance D495 ... 102-mm disk, 3.2 mm 3 A seconds (minimum aver-
thick age)
Comparative track index D3638 7.2.8 51-mm disk, 3.17 mm 5 A volts
thick
Dielectric constant at 1 MHz D150 ... 51-mm disk, 3.2 mm thick 3 E-48/50 + D-24 ⁄23 maximum average
Dissipation factor at 1 MHz D150 ... 51-mm disk, 3.2 mm thick 3 E-48/50 + D-24 ⁄23 maximum average
maximum average
Dielectric strength, step-by-step D149 7.2.6 102-mm disk, 3.2 mm 5 E-48/50 + D-48 ⁄50 kV/mm (minimum average)
thick
Flexural strength D790 7.2.2 127-mm bar, 6.4 by 12.7 5 E-48/50 + C-96 ⁄23 ⁄50 mPa (minimum average)
mm
Impact strength, side (1) D256 ... in accordance with Test 5 E-48/50 + C-96 ⁄23 ⁄50 J/m notch (minimum
Methods D256 average)
Water absorption D570 7.2.5 51-mm disk, 3.2 mm thick 3 E-24/100 + des + D-48 ⁄50 percent (maximum aver-
age)
Water extract conductance D4350 7.2.12... ... E-144/71 siemens per centimetre

7.1.3 Molding of Test Specimens—Mold test specimens by 7.2.4 Heat Resistance—Condition the specimen for 1 h at
methods that could include post-cure. No special treatment the designated temperature. After conditioning, the flexural
shall be used to improve the properties of the specimens when strength (see 7.2.2) shall be tested at the same temperature in
compared with parts molded in commercial productions. (Prac- accordance with Test Method D790. When measured at the
tices D796, D1896, and D3419 represent the best molding elevated test temperature, the molding compound shall meet
practices for thermosets.) the heat resistance requirement of retaining 50 % of the
7.1.4 Tolerance—Test specimens shall conform to the di- flexural strength value as determined at 23°C. The average of
mensional tolerances of the appropriate test method, as listed in five determinations divided by the average flexural strength as
Tables 1-4. When not otherwise stated, tolerance on dimen- determined at 23°C shall be multiplied by 100 and recorded as
sions shall be 65 %. percent flexural strength retained at the specified conditioning
7.2 Methods of Test—Unless otherwise specified, take all and testing temperature. For example:
test measurements at the standard laboratory atmosphere of 23 7.2.4.1 The temperature specified under heat resistance for
6 1.1°C and 50 6 2 % relative humidity. The test methods each material grade in Annexes A1.1 through A8.1 is the E1
shall be conducted in accordance with the applicable ASTM temperature designated in Table 1. It is the temperature at
test method, except where modified (see 7.2.1 – 7.2.12). which that particular grade shall retain a minimum of 50 % of
7.2.1 Dimensional Stability—Mold or machine the speci- its original flexural strength.
mens so the 12.7 by 12.7-mm ends are smooth and parallel. 7.2.5 Water Absorption—Use Test Method D570 to deter-
Subject the specimens to the condition C-96/23/50 (see 6.2). mine water absorption, modified as follows:
Then measure the initial length of the specimens to the nearest 7.2.5.1 Condition the specimens at 100 6 2°C for 24 h,
0.01 mm. Subject the specimens to 10 cycles, each cycle as followed by a 16 to 20-h period of cooling over silica gel or
follows: 48 h in a circulating air oven at 125 6 5°C plus 24 h calcium chloride in a desiccator at 23 6 1.1°C.
at 23 6 1.1°C and 50 6 2 % relative humidity. At the 7.2.5.2 Immerse the specimens in distilled water and main-
completion of 10 cycles, measure the final length of the tain at a temperature of 50 6 1°C for 48 h. Include in the report
specimens to the nearest 0.01 mm. The percentage dimensional only the percentage increase in weight during immersion
change is calculated to the nearest 0.1 % as follows: calculated to the nearest 0.01 % as follows:
Dimensional change, % (1) Increase in weight, %5 (2)

~ initial length 2 final length! ~ wet weight 2 conditioned weight!

5 3 100 3 100
initial length conditioned

The average percent dimensional change of the five speci- 7.2.6 Dielectric Test:
mens shall be recorded. 7.2.6.1 Dielectric Breakdown—Use the apparatus and pro-
7.2.2 Flexural Strength—Use Test Method D790 to deter- cedure specified in Test Method D149. The electrodes shall be
mine flexural strength. The span-depth ratio shall be 16:1, and American Standard No. 3 tapered pins.6 The test potential shall
the dimensions of the test bar shall be 127 by 12.7 by 6.4 mm. be applied successively between the numbered pairs of elec-
7.2.3 Heat-Deflection Temperature—Use Test Method D648 trodes (see Fig. 1), and the average of the three readings shall
to determine heat-deflection temperature. The specimens shall be taken as the reading for the specimen.
be placed directly in the oil bath and not in air. The stress load
shall be 1.82 MPa. 6
Can be found in Machinery’s Handbook.
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 D5948 − 05 (2012)
TABLE 5 Voltage Increase for Step-by-Step Test
Breakdown by Short-Time Method, Increment of Increase,
kV kV
12.5 or less 0.5
Over 12.5 to 25, inclusive 1.0
Over 25 to 50, inclusive 2.5
Over 50 to 100, inclusive 5.0
Over 100 10.0

7.2.7.3 Humidity Chamber—The humidity chamber shall

consist of a glass container with a corrosion-resistant cover.
The cover shall be provided with through-panel-type insula-
tors. The insulators may serve as supports for the electrode
holders as shown in Fig. 2. The chambers shall be of such size
that the ratio of specimen surface area to water surface area
NOTE 1—All dimensions in millimetres. shall not exceed 2.5. The ratio of volume of air in the humidity
NOTE 2—Tolerances with dimensions, 65 %. chamber to surface area of the water shall not exceed 10.
NOTE 3—Disks shall be furnished undrilled and shall be drilled by the Obtain 100 % relative humidity with condensation by natural

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laboratory. evaporation from a quantity of distilled water located at the
FIG. 1 Standard Test Specimen Drilled for Three Pairs of bottom of the chamber. Seal the cover to the chamber with an
Electrodes—Dielectric Breakdown Test
inert sealing compound applied to the exterior points formed
by the cover and the walls of the chamber. Provide a small vent
hole in the cover to equalize the pressure. Seal the vent hole as
7.2.6.2 Dielectric Strength—Use the apparatus and proce- soon as the air temperature in the humidity chamber has
dure specified in Test Method D149. Conduct the test under oil reached 70°C.
at a frequency not exceeding 100 Hz. The electrodes shall be 7.2.7.4 Specimen Holders—Install the specimens in a verti-
brass or stainless steel cylinders 25.4 mm long with the edges cal plane in the conditioning chamber with the lower edge of
rounded to a 3.2-mm radius. the specimen not closer than 25.4 mm from the surface of the
(1) Short-Time Test—The voltage shall be increased uni- water. Hold the specimens in position with the electrode
formly at the rate of 500 V/s. contactors in a matter similar to that shown in Fig. 2. Make the
(2) Step-by-Step Test—Increase the voltage in increments, as electrical connection to the specimen holders with through-
shown in Table 5, up to failure and hold it at each step for 1 panel insulators. The insulators shall be capable of withstand-
min. The change from one step to the next higher step shall be ing the adverse conditions within the chamber without exces-
made within 10 s. sive loss of insulating properties. (Insulator resistance to cover
7.2.7 Volume and Surface Resistance: plate shall at all times exceed 10 MΩ). Polytetrafluoroethylene
7.2.7.1 Specimens—Use five 102-mm diameter 3.2-mm insulators on the humidity side of the conditioning chamber are
thick specimens. Clean specimens by noninjurious methods to recommended to meet this requirement. These should be
ensure freedom from contamination. Take precautions in han- cleaned with alcohol before the start of each test. Electrode
dling the specimens to avoid additional contamination. contactors and all other metallic parts of the sample shall be
7.2.7.2 Electrodes—Electrodes shall consist of a guarded silver plated. Contact pressure against the electrodes may be
electrode 51 mm in diameter, 6.4-mm guard ring spaced 6.4 provided by backing the contactors with phosphor bronze
mm from the guarded electrode on the same side, and the third springs or other corrosion-resistant spring material.
electrode 76 mm in diameter on the opposite side and concen- 7.2.7.5 Heating Chamber—Install the humidity chamber in
tric with the guarded electrode. Dimensions of electrodes shall an oven or other heating chamber capable of maintaining a
be maintained at a tolerance of 60.40 mm [61⁄64 in.]. Silver temperature of 70 6 1°C. The rate of heating of the oven shall
paint, permeable to moisture,7 shall be used for painting be so that the air temperature at a point near the volumetric
electrodes on the specimens. The electrodes shall exhibit a center of the humidity chamber shall attain 70°C in 4 6 1 h.
resistance of not more than 5 Ω both before and after the The quality of water in the chamber shall be so that the water
C-720/70/100 + dew conditioning when measured with a po- temperature shall attain 65°C in 4 6 1 h. Maintain room
tential of not greater than 3 V between points diametrically temperature at 25 6 5°C. The insulation of the conductors
opposite each electrode. After painting, permit the specimens connecting the through-panel insulators to the measuring
to air dry for at least one week in an atmosphere of less than equipment shall not be significantly deteriorated by the el-
60 % relative humidity at a temperature of 25 6 5°C. evated temperatures encountered in the oven.
Polytetrafluoroethylene-coated wire is recommended.
7.2.7.6 Measurements—Measure volume and surface resis-
7
tances using the three-terminal method, employing measuring
DuPont silver paint No. 4517, or its equivalent, available from DuPont Corp.,
Electronic Materials, Photo Products Dept., Wilmington, DE 19898, has been found equipment such as a megaohm bridge capable of applying
suitable for this purpose. 500-V direct current (dc) to the specimen. A single set of
 D5948 − 05 (2012)
7.2.9.1 Flame Cabinet—The 14.3-mm slot at the bottom of
the flame cabinet shall be on all four sides. The door shall be
provided with a 31.8-mm diameter peep hole located directly
opposite the heater coil when the door is closed. Keep the hole
closed during testing with a cover.
7.2.9.2 Pyrometer—The means of correction from black-
body radiation to actual conditions of this test shall be as
follows:
(1) When a pyrometer calibrated for black-body emission is
used, add 6°C to the pyrometer to obtain the true temperature
of the Nichrome V coil.
7.2.9.3 Specimens—Test specimens shall be as follows:
(1) Specimens shall be molded to 12.7 by 12.7 by 127 6 1
mm.
(2) The test sample shall consist of five test specimens.
7.2.9.4 Calibration—In the calibration of this equipment,
adjust the heater current to obtain an equilibrium temperature
of 860 6 2°C.
NOTE 1—All dimensions in millimetres. 7.2.9.5 Calculation of Burning Time—Arrange the five val-
NOTE 2—Material — brass except as indicated. ues of burning time in increasing order of magnitude, as T1, T2,
NOTE 3—Silver plate all metallic parts except plate. T3, T4, T5. Compute the following ratios:
FIG. 2 Specimen Holders Electrodes Test Samples and Humidity
T2 2 T1 T5 2 T4
Chamber Cover—Volume and Surface Resistance Test and (3)
T5 2 T1 T5 2 T1

measurements shall be made of each specimen while in the If either of these ratios exceeds 0.642, then T1 or T5 is judged
conditioning chamber after 30 days of the specified condition- to be abnormal and is eliminated. The burning time reported
ing. shall be the average of the remaining four values.
7.2.9.6 Average Ignition Time—The average ignition time is
NOTE 2—Because of the variability of the resistance of a given calculated as the arithmetic mean time for the five specimens.
specimen with test conditions and because of nonuniformity of the same
material from specimen to specimen, determinations are usually not 7.2.10 Flammability—Determine the flammability rating in
reproducible to closer than 10 % and are often even more widely accordance with UL 94 using the vertical or horizontal burning
divergent. A range of values from 10 to 1 may be obtained under test and either 1.6, 3.2, or 6.4-mm thick specimens. Record as
apparently identical conditions. Errors in resistance determinations may rating/thickness in inches.
result from the fact that the current measuring device is shunted by the
resistance between the guarded terminal and the guard system. To ensure 7.2.11 Toxicity When Heated—The method described in
validity of the volume and surface resistance measurements obtained by DDC AD 297457 shall be used to determine toxicity of the test
the bridge methods, the resistance between the unguarded and the guarded specimen when heated.
terminal should be at least five times greater than the standard resistance 7.2.12 Water Extract Conductance—This test shall be per-
employed in the bridge. This may be ascertained by direct two-terminal
measurements between these two terminals. Conversion of the measure- formed in accordance with Test Method D4350, using the
ments to resistivities is not required since electrode dimensions are conditioning procedure listed in the specification tables.
specified. The potentials shall be applied to the specimens as shown in Fig.
3 or with polarities opposite to those shown on Fig. 3. Take surface 7.3 Toxicological Product Formulations— The supplier
resistance measurements on the same specimens as those used for volume shall have the toxicological product formulations and associ-
resistance, except interchange the potentials of guard and low electrodes. ated information available for review by the user to evaluate
Measure the volume and surface resistance in each case, 1 min after the the safety of the material for the proposed use.
potentials are applied. Low values of volume and surface resistance
(below 5 MΩ) may be measured by the circuits shown on Fig. 4.
8. Quality Assurance Provisions
7.2.8 Track Resistance—Measure the track resistance by the
comparative tracking index method described in Test Method 8.1 Responsibility for Inspection—The supplier is respon-
D3638. sible for the performance of all inspection requirements (ex-
Example: aminations and tests) as specified herein. The supplier shall use
DAP type Volts, min
a laboratory accredited in accordance with Guide E994, within
SDG & SDG-F 600 + the required categories in compliance with Guide E1224.
MDG & MDG-F 600 + 8.1.1 Responsibility for Compliance—The absence of any
GDI-30 & GDI-30F 600 +
SIG & SIG-F 600 +
inspection requirements in the specification shall not relieve
MIG & MIG-F 600 + the supplier of the responsibility of ensuring that all products or
GII-30 & GII-30F 600 + supplies comply with all requirements. Sampling inspection, as
7.2.9 Flame Resistance—Determine flame resistance in ac- part of the manufacturing operations and in accordance with
cordance with Method II of Test Methods D229, with the Practice D3636, is an acceptable practice to ascertain confor-
following exceptions: mance to requirements, however, this does not authorize
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 D5948 − 05 (2012)

FIG. 3 Arrangements for Volume Resistance and Surface Resistance Test

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FIG. 4 Circuits for Measuring Low Values of Volume and Surface Resistance

submission of known defective material, either indicated or (see 8.1). They shall be conducted at an accredited laboratory
actual, nor does it commit the user to accept defective material. in compliance with Guide D4697, on each batch of compound
8.2 Retention of Qualification—Any manufacturer who to be supplied to molders for production of molded parts.
makes a significant change in raw materials or process used in
the manufacture of such compounds shall continue to meet the 9. Keywords
applicable material qualification test requirements. 9.1 diallyl phthalate plastics; epoxy plastics; melamine-
8.3 Quality Conformance Inspection— Quality confor- formaldehyde plastics; molding compounds; phenolic plastics;
mance inspection shall consist of the batch acceptance tests and plastics; polyester plastics; silicone resin molding compounds
shall be as specified in the applicable material specification

ANNEXES

(Mandatory Information)

A1. MOLDING COMPOUNDS, PHENOLIC, THERMOSETTING, CONTAINING CELLULOSE FILLERS

A1.1 The requirements for acquiring the product described A1.2.3 Type CFI-10—This type is a medium-impact, cotton
herein shall consist of this specification sheet. rag-filled phenolic compound.
A1.2 Requirements —Qualification test requirements are A1.2.4 Type CFI-20—This type is a high-impact, rag- or
specified in Table A1.1. Batch acceptance test requirements are cotton-filled phenolic compound.
specified in Table A1.2.
A1.2.5 Type CFI-30—This type is a high-impact, cotton-
A1.2.1 Type CFG—This type is a general-purpose, wood- filled phenolic compound.
flour-filled phenolic compound.
A1.2.2 Type CFI-5—This type is a moderate-impact, cotton- A1.2.6 Type CFI-40—This type is the highest impact grade
or paper-filled phenolic compound. of cotton-filled phenolic compound.
 D5948 − 05 (2012)

TABLE A1.1 Qualification Test Requirements for Phenolic Resin Molding Compounds: Cellulose Filled
Type Type Type Type Type Type
Requirement
CFG CFI-5 CFI-10 CFI-20 CFI-30 CFI-40
Mechanical/Physical
Compressive strength, 172 159 138 138 131 124
endwise
Flexural strength 62 55 55 55 55 55
Heat deflection 115 115 115 115 115 115
temperature
Heat resistance 115 115 115 115 115 115
Impact strength, 11 27 53 93 160 187
sideA
Tensile strength 41 39 39 39 39 41
Water absorption 3.0 4.0 4.0 4.0 4.0 4.0
Electrical
Dielectric breakdown:
Short-time testB
Step-by-step test 30 18 18 18 18 18
Short-time testB
Step-by-step test 2.5 2.5 2.5 2.5 2.5 2.5
Dielectric strength:
Short-time test 11.8 9.8 9.5 8.3 9.8 6.9
Step-by-step test 7.9 5.9 7.1 5.9 5.9 ...
Short-time test 3.0 2.0 1.6 1.8 0.3 1.0
Step-by-step 1.8 1.1 1.1 1.0 0.4 0.6
Combustion
Flame resistance:
Ignition time 60 60 60 60 60 60
Burning time 270 330 330 330 330 330
Flammability
Rating 94HB 94HB 94HB 94HB 94HB 94HB
Thickness 3.2 3.2 3.2 3.2 3.2 3.2
A
--`,``,`,``,,,`,,``,```,,-`-``,```,,,`---

The side of the test specimen is that area formed by the chase of the mold.
B
To be recorded as the basis for determining initial voltage in the step-by-step test.

TABLE A1.2 Batch Acceptance Test Requirements for Phenolic

Resin Molding Compounds, Cellulose Filled
Property to Be Type Type Type Type Type Type
Tested CFG CFI-5 CFI-10 CFI-20 CFI-30 CFI-40
Arc resistance ... ... ... ... ... ...
Dielectric strength, 1.8 1.1 1.1 1.0 0.4 0.6
step-by-step
Flexural strength 62 55 55 55 55 55
Impact strength, 11 27 53 93 160 187
sideA
Water absorption 3.0 4.0 4.0 4.0 4.0 4.0
A
The side of the test specimen is that area formed by the chase of the mold.

A2. MOLDING COMPOUNDS, PHENOLIC, THERMOSETTING, CONTAINING MINERAL/GLASS FILLERS

A2.1 The requirements for acquiring the product described A2.2.2 Type MFH—This type is a mineral-filled phenolic
herein shall consist of this specification sheet. compound intended for applications requiring heat resistance.
A2.2 Requirements —Qualification test requirements are A2.2.3 Type GPG—This type is a general purpose glass-
specified in Table A2.1. Batch acceptance test requirements are filled phenolic compound intended for applications requiring
specified in Table A2.2. good mechanical, electrical, and heat resistant properties.
A2.2.1 Type MFE—This type is a low-loss, high-dielectric- A2.2.4 Type GPI-5—This type is a heat-resistant, moderate-
strength, low-water absorption mineral-filled phenolic com- impact, glass-filled phenolic compound having good electrical
pound. properties.
 D5948 − 05 (2012)
A2.2.5 Type GPI-10—This type is a heat-resistant, medium- A2.2.8 Type GPI-50—This type is a heat-resistant, high-
impact, glass-filled phenolic compound having good electrical impact, glass-filled phenolic compound having good electrical
properties. properties.
A2.2.6 Type GPI-20—This type is the heat-resistant, mod- A2.2.9 Type GPI-100—This type is a glass-fiber-filled phe-
erately high-impact, glass-filled phenolic compound having nolic resin molding compound of very high-impact strength
good electrical properties. and good electrical properties.
A2.2.7 Type GPI-30—This type is a heat-resistant, high-
impact, glass-filled phenolic compound having good electrical
properties.

TABLE A2.1 Qualification Test Requirements for Phenolic Resin Molding Compounds, Mineral/Glass Filled
Type Type Type Type Type Type Type Type Type
Requirement
MFE MFH GPG GPI-5 GPI-10 GPI-20 GPI-30 GPI-50 GPI-100
Mechanical/Physical
Compressive strength, endwise 103 103 159 172 172 159 138 138 138
Flexural strength 55 48 62 83 83 83 83 97 103
Heat deflection temperature 115 130 170 175 175 175 175 175 200
Heat resistance 175 200 175 200 175 175 175 175 175
Impact strength, sideA ... 13 16 27 53 107 160 267 534
Tensile strength 29 29 31 48 45 45 45 41 31
Water absorption 0.10 0.35 0.30 0.35 0.35 0.40 0.50 1.0 1.5
--`,``,`,``,,,`,,``,```,,-`-``,```,,,`---

Electrical
Dielectric breakdown:
Short-time testB
Step-by-step test 45 35 35 35 35 35 35 35 40
Short-time testB
Step-by-step test 40 10 15 15 15 15 15 15 15
Dielectric constant:
at 1 kHz 6.0 ... 7.0 7.0 7.0 7.0 7.0 7.0 7.0
6.0 ... 8.0 8.0 8.0 8.0 8.0 8.0 8.0
at 1 MHz 6.0 ... 6.0 6.0 6.0 6.0 6.0 6.0 6.0
6.0 ... 6.3 6.3 6.3 6.3 6.3 6.3 6.3
Dielectric strength:
Short-time test 12.8 8.5 10.8 9.8 9.8 9.8 9.8 9.8 11.8
Step-by-step test 10.8 5.9 8.9 7.9 7.9 7.9 7.9 7.9 7.9
Short-time test 12.8 4.9 8.9 6.9 6.9 6.9 6.9 6.9 6.9
Step-by-step test 10.8 3.2 7.9 4.9 4.9 4.9 4.9 4.9 2.0
Dissipation factor
at 1 kHz 0.03 ... 0.08 0.08 0.08 0.08 0.08 0.08 0.08
0.03 ... 0.09 0.09 0.09 0.09 0.09 0.09 0.09
at 1 MHz 0.15 ... 0.05 0.05 0.05 0.05 0.05 0.05 0.05
0.02 ... 0.06 0.06 0.06 0.06 0.06 0.06 0.06
Surface resistance 5.0 ... ... ... ... ... ... ... ...
Volume resistance 2.0 ... ... ... ... ... ... ... ...
Combustion
Flame resistance:C
Ignition time 60 100 100 100 100 100 100 100 100
Burning time 210 200 200 200 200 200 200 200 200
Flammability/Thickness-Inch:D
V-1/1.6 V-0/1.6 V-1/1.6 V-0/1.6 V-1/1.6 V-1/1.6 V-1/1.6 V-1/1.6 V-1/1.6
A
The side of the test specimen is that area formed by the chase of the mold.
B
To be recorded as the basis for determining initial voltage in step-by-step test.
C
Units–Seconds (minimum average) Test Method D229 (see 7.2.9).
D
UL 94 (see 7.2.10).

TABLE A2.2 Batch Acceptance Test Requirements for Phenolic Resin Molding Compounds, Mineral/Glass Filled
Type Type Type Type Type Type Type Type Type
Property to Be Tested
MFE MFH GPG GPI-5 GPI-10 GPI-20 GPI-30 GPI-50 GPI-100
Dielectric constant at 1 MHz 6.0 ... 6.3 6.3 6.3 6.3 6.3 6.3 6.3
Dielectric strength, step-by-step 10.8 3.2 7.9 4.9 4.9 4.9 4.9 4.9 2.0
Dissipation factor at 1 MHz 0.02 ... 0.06 0.06 0.06 0.06 0.06 0.06 0.06
Flexural strength 55 48 62 83 83 83 83 97 103
Impact strength, sideA ... 13 16 27 53 107 160 267 534
Water absorption 0.10 0.35 0.30 0.35 0.35 0.40 0.50 1.0 1.5
A
The side of the test specimen is that area formed by the chase of the mold.
 D5948 − 05 (2012)

A3. MOLDING COMPOUNDS, MELAMINE, THERMOSETTING, CONTAINING CELLULOSE, MINERAL, OR GLASS FILL-
ERS

A3.1 The requirements for acquiring the product described A3.2.4 Type MME—This type is a mineral-filled melamine
herein shall consist of this specification sheet. compound for use where good dielectric properties and arc and
flame resistance are required.
A3.2 Requirements —Qualification test requirements are
specified in Table A3.1. Batch-acceptance test requirements are A3.2.5 Type MMI-30—This type is a glass-fiber-filled
specified in Table A3.2. melamine compound of high-impact strength for use where
A3.2.1 Type CMG—This type is a cellulose-filled, general- heat resistance, arc resistance, and flame resistance are re-
purpose, melamine molding compound. quired.
A3.2.2 Type CMI-5— This type is a cellulose-filled, A3.2.6 Type MMI-5—This type is a glass-fiber-filled
moderate-impact, melamine compound. melamine resin molding compound of lower impact strength
A3.2.3 Type CMI-10— This type is a cellulose-filled, than Type MMI-30 but with superior molding properties
moderate-impact, phenol modified melamine compound. between Type MME and Type MMI-30.

TABLE A3.1 Qualification Test Requirements for Melamine Resin Molding Compounds, Cellulose, Mineral/Glass Filled
Type Type Type Type Type Type
Requirement
CMG CMI-5 CMI-10 MME MMI-5 MMI-30
Mechanical/Physical
Compressive strength, endwise 138 172 ... 172 193 138
Dimensional stability ... ... ... 0.7 ... ...
Flexural strength 55 52 76 41 59 59
Heat deflection temperature 120 160 ... 120 200 200
Heat resistance 110 110 110 110 110 110
Impact strength, sideA ... 27 53 ... 27 160
Tensile strength 34 39 ... 29 34 38
Water absorption 4.0 4.0 4.0 0.5 1.5 4.0
Electrical
Arc resistance 100 125 ... 125 180 180
Dielectric breakdown:
Short-time testB
Step-by-step test 30 18 ... 40 40 40
Short-time testB
Step-by-step test 5 2.5 ... 35 5 5
Dielectric constant:
at 1 kHz ... ... ... 7.0 9.6 8.0
... ... ... 7.0 10.0 9.0
at 1 MHz ... ... ... 6.5 7.5 7.5
... ... ... 6.5 8.0 8.0
Dielectric strength:
Short-time test 10.8 9.8 ... 12.8 8.5 5.9
Step-by-step 7.9 5.9 ... 10.8 5.9 4.9
Short-time test 4.9 2.0 ... 10.8 3.9 3.9
Step-by-step 3.9 1.2 ... 8.9 2.0 2.0
Dissipation factor:
at 1 kHz ... ... ... 0.06 0.08 0.06
... ... ... 0.07 0.10 0.08
at 1 MHz ... ... ... 0.04 0.03 0.03
... ... ... 0.05 0.04 0.04
Combustion
Flame resistance:
Ignition time 60 120 ... 90 600 600
Burning time 180 60 ... 180 0 0
Flammability
Rating 94V-0 ... ... 94V-1 94V-1 94V-1
Thickness 1.6 ... ... 1.6 1.6 1.6
Toxicity when heated:
Carbon dioxide 15 000 15 000 15 000 15 000 15 000 15 000
Carbon monoxide 1000 1000 1000 1000 1000 1000
Ammonia 2500 2500 2500 2500 2500 2500
Aldehydes as HCHO 50 50 50 50 50 50
Cyanide as HCN 60 60 60 60 60 60
Oxide of nitrogen as NO2 100 100 100 100 100 100
Hydrogen chloride 100 100 100 100 100 100
A
The side of the test specimen is that area formed by the chase of the mold.
B
To be recorded as the basis for determining initial voltage in step-by-step test.
 D5948 − 05 (2012)

TABLE A3.2 Batch-Acceptance Test Requirements for Melamine Resin Molding Compounds, Cellulose, Mineral or Glass Filled
Type Type Type Type Type Type
Property to Be Tested
CMG CMI-5 CMI-10 MME MMI-5 MMI-30
Performance Requirement for Each Compound
Arc resistance 100 125 ... 125 180 180
Dielectric constant
at 1 MHz ... ... ... 6.5 8.0 8.0
Dielectric strength, step-by-step 3.9 1.2 ... 8.9 2.0 2.0
Dissipation factor
at 1 MHz ... ... ... 0.05 0.04 0.04
Flexural strength 55 52 76 41 59 59
Impact strength, sideA ... 27 53 ... 27 160
Water absorption 4.0 4.0 4.0 0.5 1.5 4.0
A
The side of the test specimen is that area formed by the chase of the mold.

A4. MOLDING COMPOUNDS, POLYESTER, THERMOSETTING, CONTAINING MINERAL/GLASS FILLERS

A4.1 The requirements for acquiring the product described arc-resistance, flame-resistant, heat-resistant, high-impact
herein shall consist of this specification sheet. compound having good mechanical and excellent electrical
characteristics.
A4.2 Requirements —Qualification test requirements are
specified in Table A4.1. Batch-acceptance test requirements are A4.2.3 Type MAI-60—This type is a glass-fiber-filled poly-
specified in Table A4.2. ester compound for use where high-impact strength, good
A4.2.1 Type MAG—This type is a mineral-filled, polyester dielectric properties, and arc resistance are required.
compound for use where good dielectric properties and arc A4.2.4 Type MAT-30—This type is a heat-resistant, track-
resistance are required. resistant, flame-resistant, high-impact, mineral-filled, glass-
A4.2.2 Type MAI-30—This type is a mineral-filled, glass- fiber-reinforced polyester compound.
fiber-reinforced, polyester resin molding compound. It is an
--`,``,`,``,,,`,,``,```,,-`-``,```,,,`---
 D5948 − 05 (2012)
TABLE A4.1 Qualification Test Requirements for Polyester Resin
Molding Compounds, Mineral/Glass Filled
Type Type Type Type
Requirement
MAG MAI-30 MAI-60 MAT-30
Mechanical/Physical
Compressive strength, 103 138 124 124
endwise
Dimensional stability 0.2 ... ... ...
Flexural strength 52 97 83 103
Heat deflection temperature 175 200 200 225
Heat resistance 130 155 120 155
Impact strength, sideA ... 160 320 160
Tensile strength 24 41 24 41
Water absorption 0.5 0.5 1.5 0.5
Electrical
Arc resistance 175 160 130 180
Comparative track index ... ... ... 180
Dielectric breakdown:
Short-time testB
Step-by-step test 40 45 40 40
Short-time testB
Step-by-step test 35 45 35 40
Dielectric constant:
at 1 kHz 6.2 6.3 6.0 6.0
6.5 6.4 7.0 6.0
at 1 MHz 5.7 6.2 5.7 5.5
6.0 6.4 6.0 5.5
Dielectric strength:
Short-time test 14.8 11.8 5.9 12.8
Step-by-step 12.8 9.3 4.9 10.8
Short-time test 11.3 10.8 3.9 10.8
Step-by-step 9.8 9.8 2.0 8.9
Dissipation factor:
at 1 kHz 0.04 0.02 0.03 0.03
0.06 0.02 0.08 0.05
at 1 MHz 0.02 0.01 0.03 0.03
0.03 0.02 0.05 0.05
Combustion
Flame resistance:
Ignition time 60 100 90 100
Burning time 200 75 90 50
Flammability
Rating 94V-1 94V-1 94V-1 94V-1
Thickness 3.2 3.2 3.2 3.2
Toxicity when heated:
Carbon dioxide 15 000 15 000 15 000 15 000
Carbon monoxide 1000 1000 1000 1000
Ammonia 2500 2500 2500 2500
Aldehydes as HCHO 50 50 50 50
Cyanide as HCN 60 60 60 60
Oxide of nitrogen as NO2 100 100 100 100
Hydrogen chloride 100 100 100 100
A
The side of the test specimen is that area formed by the chase of the mold.
B
To be recorded as the basis for determining initial voltage in step-by-step test.

TABLE A4.2 Batch-Acceptance Test Requirements for Polyester

Molding Compounds, Mineral/Glass Filled
Type Type Type Type
Property to Be Tested
MAG MAI-30 MAI-60 MAT-30
Arc resistance 175 160 130 180
Comparative track index ... ... ... 180
Dielectric constant
at 1 MHz 6.0 ... ... ...
Dielectric strength, step- 9.8 9.8 2.0 8.9
by-step
Dissipation factor
at 1 MHz 0.03 ... ... ...
Flexural strength 52 97 83 103
Impact strength, sideA ... 160 320 160
Water absorption 0.5 0.5 1.5 0.5
A
The side of the test specimen is that area formed by the chase of the mold.

--`,``,`,``,,,`,,``,```,,-`-``,```,,,`---
 D5948 − 05 (2012)

A5. MOLDING COMPOUNDS, DIALLYL ISO-PHTHALATE THERMOSETTING, CONTAINING MINERAL FILLERS, GLASS,
OR POLYMERIC FILLERS

A5.1 The requirements for acquiring the product described A5.2.4 Type MIG-F—This type is a mineral-filled diallyl
herein shall consist of this specification sheet. iso-phthalate compound for use where good dielectric and heat
resistance properties in addition to flame resistance are re-
A5.2 Requirements —Qualification test requirements are quired.
specified in Table A5.1. Batch-acceptance test requirements are
specified in Table A5.2. A5.2.5 Type SIG—This type is a glass-filled diallyl iso-
phthalate resin compound of low-loss, high-dielectric strength,
A5.2.1 Type GII-30—This type is a glass fiber-filled diallyl
low shrinkage, heat resistance, good moisture resistance, and
iso-phthalate resin molding compound of low-loss, high-
relatively low-impact strength.
dielectric strength, low shrinkage, excellent moisture
resistance, and relatively high-impact strength. A5.2.6 Type SIG-F—This type is a glass-filled diallyl iso-
A5.2.2 Type GII-30F—This type is the same as GII-30 but is phthalate resin compound of low-loss, high dielectric strength,
also flame-resistant. low shrinkage, flame-resistant, heat resistance, good moisture
resistance, and relatively low-impact strength.
A5.2.3 Type MIG—This type is a mineral-filled diallyl
iso-phthalate compound for use where good dielectric and A5.3 Diallyl ortho-phthalate molding compounds cannot be
heat-resistance properties are required. substituted for diallyl iso-phthalate molding compounds.
--`,``,`,``,,,`,,``,```,,-`-``,```,,,`---
 D5948 − 05 (2012)
TABLE A5.1 Qualification Test Requirements for Diallyl Iso-Phthalate Resin Molding Compounds, Mineral/Glass Filled
Type Type Type Type Type Type
Requirement
GII-30 GII-30F MIG MIG-F SIG SIG-F
Compressive strength, endwise 138 138 124 124 110 110
Dimensional stability 0.1 0.1 0.2 0.2 0.2 0.2
Flexural strength 90 90 69 69 90 90
Heat deflection temperature 230 230 200 200 230 230
Heat resistance 160 160 120 120 140 140
Impact strength,
SideA 147 147 19 19 27 27
FaceB 160 160 19 19 27 27
Tensile strength 41 41 41 41 41 41
Water absorption 0.5 0.5 0.7 0.7 0.5 0.5
Electrical
Arc resistance 115 115 115 115 115 115
Dielectric breakdown:
Short-time testC
Step-by-step test 45 45 45 45 45 45
Short-time testC
Step-by-step test 40 40 45 45 40 40
Dielectric constant:
at 1 kHz 4.6 4.6 5.0 5.0 4.6 4.6
4.7 4.7 5.2 5.2 4.7 4.7
at 1 MHz 4.6 4.6 5.0 5.0 4.6 4.6
Dielectric strength: 4.7 4.7 5.2 5.2 4.7 4.7
Short-time test 12.8 12.8 12.8 12.8 12.8 12.8
Step-by-step 11.8 11.8 11.8 11.8 11.8 11.8
Short-time test 12.8 12.8 12.8 12.8 12.8 12.8
Step-by-step 11.8 11.8 11.8 11.8 11.8 11.8
Dissipation factor:
at 1 kHz 0.015 0.015 0.019 0.019 0.010 0.010
0.018 0.018 0.020 0.020 0.013 0.013
at 1 MHz 0.020 0.020 0.025 0.025 0.020 0.020
0.023 0.023 0.025 0.025 0.023 0.023
Surface resistance 5000 5000 5.0 5.0 10 5000
Volume resistance 5000 5000 2.0 2.0 10 5000
Water extract conductance 60 × 10−6 60 × 10−6 ... ... ... ...
Combustion
Flame resistance:
Ignition time ... 90 ... 90 ... 90
Burning time ... 90 ... 90 ... 90
Flammability/Thickness-Inch ... V-0/3.2 ... V-0/ ... V-0/
1.6 1.6
Toxicity when heated:
Carbon dioxide ... 15 000 ... 15 000 ... ...
Carbon monoxide ... 1000 ... 1000 ... ...
Ammonia ... 2500 ... 2500 ... ...
Aldehydes as HCHO ... 50 ... 50 ... ...
Cyanide as HCN ... 60 ... 60 ... ...
Oxide of nitrogen as NO2 ... 100 ... 100 ... ...
Hydrogen chloride ... 100 ... 100 ... ...
A
The side of the test specimen is that area formed by the chase of the mold.
B
The face of a test specimen is that area formed by the top or bottom force plug.
C
To be recorded as the basis for determining initial voltage in step-by-step test.

TABLE A5.2 Batch-Acceptance Test Requirements for Diallyl Iso-Phthalate Molding Compounds Mineral/Glass Filled
Type Type Type Type Type Type
Property to Be Tested
GII-30 GII-30F MIG MIG-F SIG SIG-F
Arc resistance 115 115 115 115 115 115
Dielectric constant at 1 MHz 4.7 4.7 5.2 5.2 4.7 4.7
Dielectric strength, step-by-step 11.8 11.8 11.8 11.8 11.8 11.8
Dissipation factor at 1 MHz 0.023 0.023 0.025 0.025 0.023 0.023
--`,``,`,``,,,`,,``,```,,-`-``,```,,,`---

Flexural strength 90 90 69 69 90 90
Impact strength, sideA 147 147 19 19 27 27
Water absorption 0.5 0.5 0.7 0.7 0.5 0.5
Water extract conductance 60 × 10−6 60 × 10−6 ... ... ... ...
A
The side of the test specimen is that area formed by the chase of the mold.
 D5948 − 05 (2012)

A6. MOLDING COMPOUNDS, DIALLYL ORTHO-PHTHALATE THERMOSETTING, CONTAINING MINERAL FILLERS,

GLASS, OR POLYMERIC FILLERS

A6.1 The requirements for acquiring the product described A6.2.8 Type SDG-F—This type is the same as SDG but is
herein shall consist of this specification sheet. also flame-resistant.
A6.2 Requirements —Qualification test requirements are A6.2.9 Type SDI-5—This type is an acrylic polymer fiber-
specified in Table A6.1. Batch-acceptance test requirements are filled diallyl ortho-phthalate resin compound of low-loss,
specified in Table A6.2. high-dielectric strength, good moisture resistance, and
A6.2.1 Type GDI-30—This type is a glass fiber-filled diallyl moderate-impact strength.
ortho-phthalate resin molding compound of low-loss, high- A6.2.10 Type SDI-30—This type is a polyethylene te-
dielectric strength, low shrinkage, excellent moisture rephthalate fiber-filled diallyl ortho-phthalate resin compound
resistance, and relatively high-impact strength. of low-loss, high-dielectric strength, good moisture resistance,
A6.2.2 Type GDI-30F—This type is the same as GDI-30 but and high-impact strength.
is also flame-resistant.
A6.2.3 Type GDI-300—This type is a glass fiber-filled A6.3 Substitutability :
diallyl ortho-phthalate resin molding compound of low-loss, A6.3.1 Diallyl iso-phthalate molding compounds may be
high-dielectric strength, low shrinkage, moisture resistance, substituted for diallyl ortho-phthalate molding compounds, as
and very high-impact strength. follows:
A6.2.4 Type GDI-300F—This type is the same as GDI-300 Diallyl Ortho-Phthalate Molding Diallyl Iso-Phthalate Molding
but is also flame-resistant. Compounds Type Compounds Substitute
GDI-30 GII-30
A6.2.5 Type MDG—This type is a mineral-filled diallyl GDI-30F GII-30F
ortho-phthalate compound for use where good dielectric prop- MDG MIG
MDG-F MIG-F
erties are required. SDG SIG
A6.2.6 Type MDG-F—This type is the same as MDG but is SDG-F SIG-F

also flame-resistant.
A6.2.7 Type SDG—This type is a glass-filled diallyl ortho-
phthalate resin compound of low-loss, high-dielectric strength,
low shrinkage, good moisture resistance, and relatively low-
impact strength.
 D5948 − 05 (2012)
TABLE A6.1 Qualification Test Requirements for Diallyl Ortho-Phthalate Resin Molding Compounds, Mineral, Glass, or Polymer Fiber
Filled
Type Type Type Type Type Type Type Type Type Type
Requirement
GDI-30 GDI-30F GDI-300 GDI-300F MDG MDG-F SDG SDG-F SDI-5 SDI-30
Mechanical/Physical
Compressive strength, endwise 138 138 138 138 124 124 110 110 124 110
Dimensional stability 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 0.2 0.2
Flexural strength 90 90 241 241 69 69 90 90 55 69
Heat deflection temperature 180 180 200 200 148 148 160 160 100 115
Heat resistance 130 130 130 130 90 90 100 100 80 90
Impact strength,
SideA 147 147 1600 1600 19 19 27 27 32 147
FaceB 160 160 1600 1600 19 19 27 27 32 160
Tensile strength 41 41 124 124 41 41 41 41 24 24
Water absorption 0.5 0.5 0.5 0.5 0.7 0.7 0.5 0.5 0.5 0.5
Electrical
Arc resistance 115 115 115 115 115 115 115 115 100 115
Dielectric breakdown:
Short-time testC
Step-by-step test 45 45 40 40 40 40 45 45 45 45
Short-time testC
Step-by-step test 40 40 35 35 40 40 40 40 40 40
Dielectric constant:
at 1 kHz 4.6 4.6 5.0 5.0 5.0 5.0 4.6 4.6 4.1 4.1
4.7 4.7 5.0 5.0 5.2 5.2 4.7 4.7 4.2 4.2
at 1 MHz 4.6 4.6 5.0 5.0 5.0 5.0 4.6 4.6 3.8 3.8
4.7 4.7 5.0 5.0 5.2 5.2 4.7 4.7 3.9 3.9
Dielectric strength:
Short-time test 12.8 12.8 12.8 12.8 12.8 12.8 12.8 12.8 12.8 12.8
Step-by-step 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8
Short-time test 12.8 12.8 12.8 12.8 12.8 12.8 12.8 12.8 12.8 12.8
Step-by-step 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8
Dissipation factor:
at 1 kHz 0.015 0.015 0.020 0.020 0.019 0.019 0.015 0.015 0.025 0.020
0.018 0.018 0.025 0.025 0.020 0.020 0.015 0.015 0.028 0.025
at 1 MHz 0.020 0.020 0.025 0.025 0.025 0.025 0.020 0.020 0.035 0.025
0.023 0.023 0.030 0.030 0.025 0.025 0.023 0.023 0.025 0.025
Surface resistance 5000 5000 5000 5000 5.0 5.0 10 5000 100 10
Volume resistance 5000 5000 5000 5000 2.0 2.0 10 5000 100 10
Water extract 60 × 10−6 60 × 10−6 ... ... ... ... ... ... ... ...
Combustion
Flame resistance:
Ignition time ... 90 ... 90 ... 90 ... 90 ... ...
Burning time ... 90 ... 90 ... 90 ... 90 ... ...
Flammability/Thickness-Inch: ... V-0/3.2 ... V-0/3.2 ... V-0/1.6 ... V-0/1.6 ... ...
Toxicity when heated:
Carbon dioxide ... 15 000 ... 15 000 ... 15 000 ... 15 000 ... ...
Carbon monoxide ... 1000 ... 1000 ... 1000 ... 1000 ... ...
Ammonia ... 2500 ... 2500 ... 2500 ... 2500 ... ...
Aldehydes as HCHO ... 50 ... 50 ... 50 ... 50 ... ...
Cyanide as HCN ... 60 ... 60 ... 60 ... 60 ... ...
Oxide of nitrogen as NO2 ... 100 ... 100 ... 100 ... 100 ... ...
Hydrogen chloride ... 100 ... 100 ... 100 ... 100 ... ...
A
The side of the test specimen is that area formed by the chase of the mold.
B
The face of the test specimen is that area formed by the top or bottom force plug.
C
To be recorded as the basis for determining initial voltage in step-by-step test.

TABLE A6.2 Batch-Acceptance Test Requirements for Diallyl Ortho-Phthalate Molding Compounds, Mineral, Glass, or Polymer Fiber
Filled
Type Type Type Type Type Type Type Type Type Type
Property to Be Tested
GDI-30 GDI-30F GDI-300 GDI-300F MDG MDG-F SDG SDG-F SDI-5 SDI-50
Performance Requirement for Each Compound
Arc resistance 115 115 115 115 115 115 115 115 100 115
Dielectric constant
at 1 MHz 4.7 4.7 5.0 5.0 5.2 5.2 4.7 4.7 3.9 3.9
Dielectric strength, step-by-step 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8 11.8
Dissipation factor
at 1 MHz 0.023 0.023 0.030 0.030 0.025 0.025 0.023 0.023 0.025 0.025
Flexural strength 90 90 241 241 69 69 90 90 55 69
Impact strength, sideA 147 147 1600 1600 16 16 27 27 32 147
Water absorption 0.5 0.5 0.5 0.5 0.7 0.7 0.5 0.5 0.5 0.5
Water extract conductance 60 × 10−6 60 × 10−6 ... ... ... ... ... ... ... ...
A
The side of the test specimen is that area formed by the chase of the mold.

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 D5948 − 05 (2012)

A7. MOLDING COMPOUNDS, SILICONE, THERMOSETTING, CONTAINING MINERAL/GLASS FILLERS

A7.1 The requirements for acquiring the product described TABLE A7.1 Qualification Test Requirements for Silicone Resin
herein shall consist of this specification sheet. Molding Compounds, Mineral/Glass Filled
Type Type
Requirement
A7.2 Requirements —Qualification test requirements are MSG MSI-30

specified in Table A7.1. Batch-acceptance test requirements are Mechanical/Physical

Compressive strength, endwise 103 69
specified in Table A7.2. Flexural strength 41 48
Heat deflection temperature 200 200
A7.2.1 Type MSG—This type is a mineral-filled silicone Heat resistance 150 150
A
compound of low-loss, dielectric strength, and excellent heat Impact strength, side 13 171
Tensile strength 17 14
resistance. Water absorption 0.50 0.50
Electrical
A7.2.2 Type MSI-30—This type is a glass-fiber-filled sili- Arc resistance 210 175
cone compound of high-impact strength and heat resistance but Comparative track index
Dielectric breakdown:
somewhat poorer electrical properties than Type MSG. Short-time testB
Step-by-step test 35 30
Short-time testB
Step-by-step test 35 30
Dielectric constant:
at 1 kHz 5.0 5.0
5.2 5.5
at 1 MHz 4.7 4.7
5.0 5.1
Dielectric strength:
Short-time test 12.8 6.3
Step-by-step test 11.8 4.9
Short-time test 11.8 3.0
Step-by-step test 10.8 2.0
Dissipation factor:
at 1 kHz 0.015 0.015

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0.020 0.050
at 1 MHz 0.010 0.010
0.015 0.060
Surface resistance 1000 ...
Volume resistance 1000 ...
Combustion
Flame resistance:
Ignition time 90 90
Burning time 120 120
Flammability
Rating 94V-1 94V-1
Thickness 1.6 1.6
Toxicity when heated:
Carbion dioxide 15 000 15 000
Carbon monoxide 1000 1000
Ammonia 2500 2500
Aldehydes as HCHO 50 50
Cyanide as HCN 60 60
Oxide of nitrogen as NO2 100 100
Hydrogen chloride 100 100
A
The side of the test specimen is that area formed by the chase of the mold.
B
To be recorded as the basis for initial voltage in the step-by-step test.
 D5948 − 05 (2012)
TABLE A7.2 Batch Acceptance Test Requirements for Silicone
Resin Molding Compounds, Mineral/Glass Filled
Type Type
Property to Be Tested
MSG MSI-30
Arc resistance 210 175
Dielectric constant at 1 MHz 5.0 5.1
Dielectric strength, step-by-step 10.8 2.0
Dissipation factor at 1 MHz 0.015 0.060
Flexural strength 41 48
Impact strength, sideA 13 171
Water absorption 0.50 0.50
A
The side of the test specimen is that area formed by the chase of the mold.

A8. MOLDING COMPOUNDS, EPOXY THERMOSETTING, CONTAINING MINERAL/GLASS FILLERS

A8.1 The requirements for acquiring the product described A8.2.4 Type MEH—This type is a mineral-filled, epoxy
herein shall consist of this specification sheet. compound intended for applications requiring heat resistance.
A8.2 Requirements —Qualification test requirements are A8.2.5 Type GEI-5—This type is a glass-filled epoxy com-
specified in Table A8.1. Batch-acceptance test requirements are pound of moderate-impact strength.
specified in Table A8.2.
A8.2.6 Type GEI-20—This type is a glass-filled epoxy
A8.2.1 Type MEC—This type is a mineral-filled epoxy compound with good impact strength.
compound intended for encapsulation purposes.
A8.2.7 Type GEI-100—This type is a glass-filled epoxy
A8.2.2 Type MME—This type is a mineral-filled, epoxy
compound having high-impact strength.
compound for use in encapsulation with good dielectric prop-
erties and arc and flame resistance. A8.2.8 Type GEI-250—This type is a glass-filled epoxy
A8.2.3 Type MEG—This type is a mineral-filled, general compound with very high-impact strength.
purpose, epoxy compound.
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 D5948 − 05 (2012)
TABLE A8.1 Qualification Test Requirements for Epoxy Resin Molding Compounds, Mineral/Glass Filled
Type Type Type Type Type Type Type Type
Requirement
MEC MEE MEG MEH GEI-5 GEI-20 GEI-100 GEI-250
Mechanical/Physical
Compressive strength, endwise 138 138 138 138 172 172 172 179
Dimensional stability ... 0.1 0.1 0.1 0.1 0.1 0.2 0.2
Flexural strength 83 83 83 83 103 110 110 241
Heat deflection temperature 130 130 130 175 130 150 175 200
Heat resistance 150 150 150 150 150 150 150 150
Impact strength, sideA 11 16 16 19 27 107 534 1334
Tensile strength 41 41 41 41 48 55 55 103
Water absorption 0.5 0.3 0.3 0.3 0.3 0.5 0.5 0.25
Electrical
Arc resistance 120 180 150 150 150 130 130 120
Dielectric breakdown:
Short-time testB
Step-by-step test 40 40 40 40 40 40 40 40
Short-time testB
Step-by-step test 35 35 35 35 35 35 35 35
Dielectric constant:
at 1 kHz 5.2 5.0 5.3 5.8 5.8 5.8 5.8 6.3
5.4 5.2 5.5 6.0 6.0 6.0 6.0 6.6
at 1 MHz 5.0 4.8 5.5 5.5 5.5 5.5 5.5 6.0
5.2 5.0 5.7 5.7 5.7 5.7 5.7 6.3
Dielectric strength:
Short-time test 12.8 12.8 12.8 12.8 12.8 11.8 11.8 11.8
Step-by-step test 11.8 11.8 11.8 11.8 11.8 10.8 10.8 10.8
Short-time test 12.8 12.8 12.8 12.8 12.8 11.8 11.8 11.8
Step-by-step test 11.8 11.8 11.8 11.8 11.8 10.8 10.8 10.8
Dissipation factor:
at 1 kHz 0.018 0.018 0.020 0.025 0.025 0.025 0.025 0.025
0.020 0.020 0.025 0.030 0.030 0.030 0.030 0.030
at 1 MHz 0.018 0.018 0.025 0.020 0.020 0.020 0.020 0.020
0.020 0.020 0.030 0.025 0.025 0.025 0.025 0.025
Surface resistance 1.0 10 6.0 100 10 10 10 10
Volume resistance 1.0 10 6.0 100 10 10 10 10
Combustion
Flame resistance:
Ignition time 100 100 100 100 100 100 100 100
Burning time 200 200 200 200 200 200 200 200
Flammability
Rating 94V-0 94V-0 94V-0 94V-0 94V-0 94V-0 94V-0 94V-0
Thickness 3.2 3.2 3.2 6.4 6.4 6.4 6.4 6.4
A
The side of the test specimen is that area formed by the chase of the mold.
B
To be recorded as the basis for determining initial voltage in the step-by-step test.

TABLE A8.2 Batch-Appearance Test Requirements for Epoxy Molding Compounds, Mineral/Glass Filled
Type Type Type Type Type Type Type Type
Property to be tested
MEC MEE MEG MEH GEI-5 GEI-20 GEI-100 GEI-250
Arc resistance 120 180 150 150 150 130 130 120
Dielectric constant at 1 MHz 5.2 5.0 5.7 5.7 5.7 5.7 5.7 6.3
Dielectric strength, step-by-step 11.8 11.8 11.8 11.8 11.8 10.8 10.8 10.8
Dissipation factor at 1 MHz 0.020 0.020 0.030 0.025 0.025 0.025 0.025 0.025
Flexural strength 83 83 83 83 103 103 110 241
Impact strength, sideA 11 16 16 19 27 107 534 1334
Water absorption 0.5 0.3 0.3 0.3 0.3 0.5 0.5 0.25
A
The side of the test specimen is that area formed by the chase of the mold.
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 D5948 − 05 (2012)
SUMMARY OF CHANGES

Committee D20 has identified the location of selected changes to this standard since the last issue,
D5948 - 96(02)ε1, that may impact the use of this standard. (March 1, 2005)

(1) Added 3.2.2. (2) Rewrote 7.2.4.1.

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