ml Designation: D 580-99

AMERICAN SOCIETY FOR TESTING AND MATERIALS

100 Sam Harbor Dr., West Censhohocken, PA 1S428
Reptinted frcm the Annual So&of ASTM Standards. Copyright ASTM

Standard Specification for

Greige Woven Glass Tapes and Webbings’
This standard is issued under the tked deaignatiorr D 58@ the number immediately fotlowing the designation indicates the year of
origirrrd adoption or, in the case of revision, the year of last revision. A number in parentheses indicatea the year of last respproval. A
superscript epsilon (e) indicates an editorial change since the lm.t revision or reapproval.

1. Scope D 3775 Test Method for Fabric Count of Woven Fabric3

1.1 This specification primarily covers greige tapes and D 3776 Test Methods for Mass per Unit Area (Weight) of
webbings woven from “E” electrical classification glass fiber Woven Fabric3
yams. This specification can also be applied to tapes and D 4029 Specification for Finished Woven Glass Fabrics3
webbings made of other glass fiber grades upon agreement D 4963 Test Method for Ignition Loss of Glass Strands and
between the purchaser and the supplier. Fabrics3
1.2 This specification is intended to assist ultimate users by D 5035 Test Method for Breaking Strength and Elongation
designating the types of these products that are typical in the of Textile Fabrics (Strip Method)2
industry. This specification permits the application of organic 2.2 ANSI Standard:
materials to the glass fiber yarn during manufacture that helps ANSIIASQC Z1.4 Sampling Procedures for Inspection by
facilitate weaving. When used as permitted in this specifica- Attributes
tion, such materials will not interfere with the intended end use
3. Terminology
requirements.
1.3 The values stated in either S1 units or inch-pound units 3.1 Definitions:
are to be regarded separately as standard. The values stated in 3.1.1 continuomfilament yam, n—a yarn made of filaments
each system may not be exact equivalents; therefore, each that extend substantially throughout the length of the yarn.
system shall be used independently of the other. Combining ~. 1.2 greige goods, n—textile fabrics that have received no
values from the two systems may result in nonconformance bleaching, dyeing, or finishing treatment after being produced
with the standard. by any textile process.
1.4 This standard does not purport to address all of the 3.1.3 tape, n—in textiles, a narrow fabric with a mass per
safety concerns, if any, amociated with its use. It is the unit area of less than 0.5 kg/m 2 (O.1 lb/ft2) for each 25.4 mm
responsibility of the user of this standard to establish appro- (1 in.) of width and which is used primarily for utilitarian
priate safety and health practices and determine the applica- purposes.
bility of regulatory limitations prior to use. 3.1.4 webbing, n—in textiles, a stout narrow fabric with a
mass per unit area of at least 0.5 kgfm 2 (O.1 lb/&) for each
2. Referenced Documents 25.4 mm (1 in.) of width.
2.1 ASTM Standards: 3.1.5 For definitions of other textile terms used in this
D 123 Terminology Relating to Textiles2 specification, refer to Terminology D 123.
D 578 Specification for Glass Fiber Strands2
CLASSIFICATION
D 579 Specification for Greige Woven Glass Fabrics2
D 1059 Test Method for Yarn Number Based on Short- 4. Classification
Length Specimens2 4.1 Greige glass fiber tapes and webbings are produced in
D 1423 Test Method for Twist in Yarns by the Direct-
two types and are constructed with yarns designated as directed
Counting Method2 in Specification D 578. The standard types are:
D 1776 Practice for Conditioning Textiles for Testin~ 4.1.1 Type A—Medium texture.
D 1777 Test Method for Thickness of Textile Materials2 4.1.2 Type B-Open texture.
D 3773 Test Methods for Length of Woven Fabric3 4.2 The designation of a tape or webbing shall be by style
D 3774 Test Methods for Width of Woven Fabric3 numbers that are standard throughout the industry.
4.3 Two segments of characters are used to describe tapes
and webbings.
‘ This specification is under the jurisdiction of ASTM Committee D-13 on
Textiles and is the direct reepasibility of Subcommittee D13. 18 on Glsss Fiber and
4.3.1 ‘fhe first segment of the description of tape or webbing
Its hdUCtS. describes the glass classification, the type fiber in the warp, and
Current edition approved March 10, 1999. Published June 1999. Originatty
published as D580 – 4U’E Last previous edition D580 – 94.
2Annual Book of ASTM Standards, Voi 07.01. 4Available horn American National Standards Institute, 11 W. 42nd St., 13th
3Annaal Book of ASTM Stanalmis, Vol 07.02. Floor, New Yorkj NY 10036.

1
the type fiber in the filling. 8. Yarn Number
4.3.1.1 The first letter in the first segment is one of the 8.1 For tapes and webbings, the nominal size-free yarn
following glass classification codes: “E” for electrical;’ C“ for numbers of the yarns designated shall conform to Specification
chemical, “S” for high strength. D 578.
4.3.1.2 The second letter in the iirst segment specities the
fiber type in the warp direction “C” describes continuous 9. Filament Diameter
filament fiber using either S1 units or inch-pound units, staple 9.1 The nominal values for the filament diameters when
(discontinuous) fiber is described by “D in S1 units or “S” in agreed upon between purchaser and supplier are listed in Table
inch-pound units. 1 of Specification D 578. The average filament diameter for the
4.3.1.3 The third letter in the first segment specifies the fiber yarns in the tape or webbing shall conform to Specification
type in the filling direction: “C” describes continuous tilament D 578 for the specified filament diameter.
fiber using either S1 units or inch-pound units, staple (discon-
tinuous) fiber is described by “D’ in S1 units or “S” in 10. Strand Construction
inch-pound units. 10.1 The basis for specifying strand construction is given in
4.3.2 The second segment of the description of tape or Specification D 578. The construction of the component
webbing describes the texture: “A” describes medium texture strands shall be agreed upon between the purchaser and the
and” B’ describes close texture. supplier.
4.4 Examples of glass fiber tapes or webbings.
11. Direction of ‘hist
4.4.1 Example la (S1 units):
11.1 Unless otherwise agreed upon between the purchaser
ECD – B (1)
and the supplier, the primary twist in the singles strands shall
where: be “Z” twist and the final twist in the plied yarns shall be “S”
E = electrical glass, twist.
C = continuous filament yarn warp direction,
12. Twist Level
D = discontinuous (staple) yarn filling direction, and
B = close textured. 12.1 The nominal twist in the component strands and the
4.4.2 Example lb (inch-pound units): finished yarns shall be agreed upon between the purchaser and
ECS – B (2)
supplier. The tolerances for the primary twist and the final twist
shall conform to Table 4.
where:
13. Tape Weave ~pe
E = electrical glass,
C = continuous filament yarn warp direction, 13.1 For tapes listed in Tables 1 and 2 and webbings listed
S = staple (discontinuous) filament yarn falling direction, in Table 3, the weave type shall be plain weave. For tapes and
and webbings not listed in Table 1, Table 2, and Table 3, the weave
B = close textured. type shall be agreed upon between the purchaser and the
supplier.
REQUIREMENTS
14. Length per Unit Mass
5. Material
14.1 For tapes listed in Tables 1 and 2, and webbings listed
5.1 The fiber shall be continuous filament or staple (discon- in Table 3, the nominal length per unit mass shall conform to
tinuous) fiber, as agreed upon between the purchaser and the requirements of Table 1, Table 2, and Table 3, respectively.
supplier, bee of any free alkali metal salts, such as soda or For tapes and webbings not listed in Table 1, Table 2, and Table
potash, and foreign particles, dirt, and other impurities. 3, the nominal length per unit mass shall be agreed upon
between the purchaser and the supplier. The average length per
6. Fabric Count
unit mass for the lot shall be within the interval: specified
6.1 For tapes listed in Tables 1 and 2, and webbings listed in length per unit mass t 10 % of the specified length per unit
Table 3, the nominal fabric count shall conform to the mass.
requirements of Table 1, Table 2, and Table 3, respectively. For
tapes or webbings not listed in Table 1, Table 2, and Table 3, 15. Thickness
the nominal fabric count shall be agreed upon between the 15.1 For tapes listed in Tables 1 and 2, and webbings listed
purchaser and the supplier. The average count of warp ends in Table 3, the nominal thickness shall conform to the
shall be within one end of the nominal count and the average requirements of Table 1, Table 2, and Table 3, respectively. For
count of the filling picks shall be within two picks of the tapes and webbings not listed in Table 1, Table 2, and Table 3,
nominal count. the nominal thickness shall be agreed upon between the
purchaser and the supplier. The average thickness of the tape or
7. Yarn Designations webbing in the lot shall conform to the requirements of Table
7.1 For tapes and webbings, the yarn designations shall be 5, unless specified otherwise.
as agreed upon between the purchaser and supplier. The
requirements of the individual elements of the designation are 16. Breaking Strength
specified in Sections 8-12. 16.1 For tapes listed in Tables 1 and 2, and webbings listed

2
 6N D 580
TABLE 1 Physicsl Properties of Generally Available “E Glass Greige Woven Glass Continuous Filament Tape, Plain Wssve
Lengthper Minimum
Thiikneas Width PickCount
Tape No. Total Ends Unit Mass BreakingSirength
mm in. mm in. 25 mm in. tex yd/lb N Ibf
ECC-A 0.130 0.005 12.7 v2 24 34 35 1923 258 445 100
19.0 % 32 34 35 2681 185 600 135
25.4 1 42 34 35 3543 140 712 160
25.4 1 36 33 34 3386 146 712 160
36.1 62 34 35 5222 95 1112 250
50.8 72 33 34 6795 73 1334 300
63.5 104 34 35 9186 54 1557 350
76.2 106 33 34 10124 49 2224 500
102.0 144 33 34 13407 37 2513 565

ECC-A 0.180 0.007 12.7 24 31 32 2771 179 578 130

19.0 32 31 32 3875 128 778 175
25.4 42 31 32 5114 97 1066 240
36.1 62 31 32 7404 67 1646 370
50.8 68 31 32 10334 46 2313 520

0.255 0.010 12.7 Vi 16 21 21 3730 133 712 160

19.0 3/4 24 21 21 5674 89 1112 250
25.4 1 32 21 21 7295 66 1557 350
36.1 1y2 46 21 21 11023 45 2446 550

ECC-A 0.360 0.015 12.7 % 14 16 16 5222 95 934 210

19.0 Y4 20 16 18 7516 66 1423 320
25.4 1 26 16 16 9921 50 1957 440
36.1 1t/2 40 16 16 15032 33 2936 660

ECC-B 0.075 0.003 9.5 % 21 41 42 800 620 200 45

12.7 4/2 30 41 42 1164 419 267 60
19.0 Y4 45 41 42 1759 282 423 95
25.4 1 63 41 42 2408 206 600 135
36.1 11/2 106 41 42 4066 122 845 190

0.130 0.005 9.5 21 38 39 1778 279 512 115

12.7 27 38 39 2297 216 600 135
19.0 39 38 39 3329 149 1001 225
25.4 51 38 39 4390 113 1379 310
36.1 75 38 39 6442 77 1957 440

ECC-B 0.178 0.007 9.5 % 21 38 39 2147 231 512 115

12.7 1/2 27 38 39 2771 179 600 135
36.1 3h 39 38 39 4033 123 1001 225
25.4 1 51 38 39 5277 94 1379 310
36.1 1i~ 75 38 -_
9!2 7874 63 1957 440

TABLE 2 Physiesl Properties of Generally Available “E” Glass Greige Woven Glass Staple (Discontinuous) Filament Taps, Plain Weave
Minimum
Lengthper
Thickness Pick Count Breaking
Tape No. TotalEnds Unit Mass
Strength
mm in. mm in. 25 mm in. tex ydllb N lbf
ESS-A 0.255 0.010 12.7 % 18 21 21 3906 127 445 100
19.0 3/4 26 21 21 5977 83 667 15Q
25.4 1 34 21 21 7632 65 890 200
38.1 11~ 52 21 21 11811 42 1334 300

0.036 0.015 19.0 Y. 20 16.5 16.5 8268 60 880 200

25.4 1 28 16.5 16.5 11023 45 1112 25a
36.1 j 1/2 52 16.5 16.5 17105 29 1557 350

in Table 3, the average breaking strength shall conform to the 17. Width
requirements of Table 1, Table 2, and Table 3, respectively. For
17.1 For tapes listed in Tables 1 and 2, and webbings listed
tapes and webbings not listed in Table 1, Table 2, and Table 3,
in Table 3, the nominal width shall conform to the requirements
the average breaking strength shall be agreed upon between the
of Table 1, Table 2, and Table 3, respectively. For tapes and
purchaser and the supplier. The average breaking strength for
the lot shall exceed the specified breaking strength and no webbings not listed in Table 1, Table 2, and Table 3, the
individual break shall be less than 8070 of the specified nominal width shall be agreed upon between the purchaser and
average breakingstrength the supplier, The tolerances for width shall conform to Table 6

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 f~ D 580
TABLE 3 Physical Properties of Generally Available “E Glass Greige Woven Glass Steple (Discontinuous) Filament Webbing, Plain
Weeve
Minimum
Lengthper
Thiikness Wdth Pick Count Breaking
Tape No. TotalEnds Unit Masa
Strength
mm in. mm in. 25 mm in. tex ycfilb N Ibf
ESS-A 0.510 0.020 19.0 Y“ 20 14 14 10124 49 1112 250
25.4 1 28 14 14 13779 36 1334 300
38.1 I ye 44 14 14 19642 25 2002 450

0.635 0.025 19.0 3/4 20 10 10 11274 44 934 210

25.4 1 28 10 10 15502 32 1334 300
W.1 1i~ 44 10 10 27559 18 2448 550

TABLE 4 Twist Tolerances TABLE 5 Tolerances-Thickness

Tolerances PermissibleVariations,Average
Turns per Centimet~ NominalThickness Staple
Continuous
Fmm zem to 0.4, inci fO.1 turn per centimeters (discontinuous)
Over 0.4 and up to and *0.2 turn per centimetre
millimetres
including4.0
Over 4 t5.O % of the specified 0.125 and under to.o13 ...
average lwist Over 0.125 to 0.250 *0.025 ko.050
Turns per Metrrx Over 0.250 to 0.380 *0.050 to.075
From zero to 40, incl t 10 turnsper metre Over 0.360 to 0.025 ... 20.075
Over 40 and up to and *2O turnsper metrs
inches
including400
Over 400 *5.O % of the specified 0.0050 and under ?O.0005 ...
average twist Over 0.0050 to 0.0100 *0.0010 *0.0020
Turns per Inch Over 0.0100 to 0.0150 *0.0020 to.oo30
From zero to 1, incl *0.25 turn per inch Over 0.0150 to 0.0250 ... to.oo30
Over 1 and up to and *0.5 turn per inch
PermissibleVariations,Individual
including10
Over 10 *5.O YO of the specified Staple
average lwist Continuous
(discontinuous)

unless otherwise agreed upon between the purchaser and the 0.125 and under *0.025 ...
supplier. Over 0.125 to 0.250 ?0.040 *0.075
Over 0.250 to 0.380 *0.060 to.090
18. Length Per Package Over 0.360 to 0.635 ... ?0.090

18.1 The nominal length of tape or webbing on each inches

package, such as a spool or serving tube, shall be no more than 0.0050 and under to.ool o ...
Over 0.0050 to 0.0100 *0.001 5 ko.mo
36 m (40 yd) nor no less than 32 m (36 yd) except for 0.075
Over 0.0100 to 0.0150 kO.0025 ?0.0035
mm (0.003 in.) thick tape or webbing which shall be no more Over 0.0150 to 0.0250 ... 20.0035
than 68 m (76 yd) nor no less than 65 m (72 yd), unless
otherwise agreed upon between the purchaser and the supplier.
TABLE 6 Tolerances-Tape Width
18.2 Unless otherwise agreed upon between the purchaser
NominalTape Width, PermissibleVariation,
and the supplier, no piece of tape or webbing shall be less than mm (in.) mm (in.)
14 m (15 yd) long and there shall be no more than two pieces Less than 25.4 (1.0) *0.8 (V=)
in a package. Over 25.4 (1.0) :1.6 (V@
18.3 None of the sample tubes or serving spools shall
contain more than the allowable pieces, and the combined
20.2 The tape or webbing in the laboratory sample for the
length of all of the sample tubes or serving spools shall not be
visual appearance shall be examined on both sides for the
less than the combined length of those tubes or serving spools
defects listed in Table 7 and the acceptable quality levels
on the identification labels.
(AQLs) shall be 0.65 major and 2.5 total (major and minor
19. Ignition Loss combined) defects per hundred units of tape or webbing unless
19.1 The organic content of greige tape or webbing shall be otherwise agreed upon between the purchaser and the supplier.
less than 4.0 % unless otherwise agreed upon between the
purchaser and the supplier.
21. Put-up
21.1 The tape or webbing shall be furnished in rolls and
20. Viiual Appearance shall be wound on suitable tubes or serving spools with cores
20.1 The woven greige tape or webbing shall be generally of the same width as the tape or webbing, measuring 9.5 mm
uniform in quality and condition, clean, smooth, and free of (% in.) inside diameter, unless otherwise specified. The ends of
foreign particles and from defects detrimental to fabrication, the rolls shall be securely fastened with gummed tape to
appeamnce, or performance. prevent slippage and unrolling of the tape or webbing. The

4
 #IbD 580
TABLE 7 Classification of Defects 24.2 LX Sample—Unless otherwise agreed upon, take at
Classification random as a lot sample the number of rolls of tape or webbing
Defect
Maior Minor specified in AIWWASQC Z1.4 and a single sampling plan.
Any hole, cut, tear, or smash x
24.3 Laboratory Sample—As a laboratory sample, take the
Baggy,ridgy,or wavy clothor tape x following samples:
Spot or stein, uncleaned 24.3.1 For visual appearance, width, and length, the rolls in
13 mm (v2 in.) or more in combinedlengthand x
widthdirections
the lot sample serve as the laboratory sample.
Less than 13 mm (% in.) in combinedlengthand x 24.3.2 For other properties, take at random from the rolls in
widthdirections the lot sample the number of rolls specified in Table 8.
Tender,weal$ or thin place x
Brokenor missingyarn
24.4 Test Specimens-For visual appearance, widb and
Two or more contiguous,regardlessof length x length, the rolls in the lot sample serve as test specimens. For
Single, 50 mm (2 in.) or more in length x other properties, take material from the outside of each roll in
Single, lees than 50 mm (2 in.) in length x
Untreatedarea the laboratory sample as a source of the test specimens required
13 mm (1/2 in.) or more in combinedlengthand x in the respective test methods in this specification after first
widthdirections discarding a minimum of 1 m (1 yd) from the very outside of
Less than 13 mm (% in.) in combinedlengthand x
widthdirections the roll.
Floatsand skips
Two or more, rqardlees of length x 25. Conditioning
Single, 50 mm [2 in.) or more in length x 25.1 Condition the laboratory samples for a period of at
Single, morethan 6.5 mm (% in.) but lass than 50 x
mm (2 in.) in length least 5 h in the atmosphere in accordance with Practice D 1776.
Any hard embeddedcrease x Test under the same conditions. Preconditioning is not re-
Any brittleor fused ares x
x quired.
WIrfth beyondspecifiedtolerances
Uneven weaving x Nors l--Glass textilesarenormallytestedundereitherthe atmosphere
At a normalinspectiondistanceof 1 m (3 ft).
for textilesor for plasticsdependingon theirend use.

TEST METHODS
maximum number of pieces contained in any roll shall be as
specified in 18.2. The supplier may use his standard practice 26. Material
when agreed upon between the purchaser and the supplier. 26.1 Accept the supplier’s certification that the material is
of the correct classification as specified in Specification D 578.
22. Packaging
Vefi that the fiber is continuous or staple (discontinuous) as
22.1 Each roll of tape or webbing, put up as specifted shall specified, during testing for strand construction as directed in
be packaged to afford adequate protection against physical Section 30. Determine the freedom from detrimental impurities
damage during shipment from the supply source to the receiv- during the inspection for visual appeamnce as directed in
ing activity. The supplier may use his standard practice when it Section 40.
meets this requirement.
27. Fabric Count
23. Marking 27.1 Determine the fabric count as directed in Test Method
23.1 Each package shall be marked to show the following D 3775, making one count in the warp direction across the full
information unless specified otherwise between the purchaser width and three counts in the fill direction spaced 1 m (1 yd)
and the supplier. Characters shall be of such size as to be apart, on each of the selected rolls in the laboratory sample.
clearly legible and shall not be obliterated by normal handling:
100 ‘%0Fiber Glass 28. Yarn Number
Style 28.1 Determine the size-free yarn number in tex or yards per
Length pound for both the warp and filling yarns as directed in
Width Specification D 578, using a skein length of 1 m or 1 yd for
Purchase Order Number each specimen and three specimens from each of the rolls in
Manufacturers’ Identification the laboratory sample. Several shorter lengths of yarn can be
23.1.1 All tapes and webbings will be considered Type” E“ used to prepare the 1 m (1 yd) specimen length.
electrical grade unless specified otherwise. If glass type is other 29. Filament Diameter
than electrical Grade “E’, each package shall be marked
accordingly. 29.1 Determine the filament diameter for both the warp and
TABLE 8 Sample Size Determination for Construction and
SAMPLING AND CONDITIONING Physical Properties

24. Sampliig Sample Size,

Lot Size in Units,
Numberof
m or yd
24.1 LOtSjze—A lot shall consist of each 9000 m (10 000 Units
yd) of a single tape or webbing style, thickness, and width 800 or lees 2
unless otherwise agreed upon between purchaser and the 801 up to and including22 000 3
22 001 and over 5
supplier.

5
tilling yarns as directed in Specification D 578 by using 50 D 5035. A CRT-type tensile testing machine shall be operated
individual filaments from one yarn test specimen from both the at 305 * 10 mrn/min (12 * 1/2 in.). A CRE-type tensile testing
warp and filling yarns in each of the rolls in the laboratory machine shall be operated at 15 * 1 mm/min. (0.6 & tensile
sample. 0.05 in.) unless specified otherwise. The distance between
clamps shall be 75 Y 1 mm (3 * 0.05 in.). There may be no
30. Strand Construction overall correlation between the results obtained with the
30.1 Verify the number of singles strands and the number of CRE-type tensile testing machine and the CRT-type tensile
plied or cabled strands on one test specimen of warp yarn and testing machine. Consequently, these two tensile testing ma-
one specimen of filling yarn in each of the rolls in the chines cannot be used interchangeably. In case of controversy,
laboratory sample while determining the twist direction or the CRE-type tensile testing machine shall prevail.
twist level. See also Section 26.
37. Width
31. Dhwction of Twist 37.1 Determine the width of the tape or webbing as directed
31.1 Verify the direction of twist in each strand of the yarns in Test Methods D 3774, Option A, and the ftee of tension
as directed in Test Method D 1423 for one test specimen of procedure, except that five measurements per roll shall be
warp yarn and one test specimen of filling yarn from each of made on each of the rolls in the lot sample.
the rolls in the laboratory sample. 38. Length
32. Twist Level 38.1 Measure the length of each roll in the lot sample as
directed in Test Methods D 3773 using any one of the four
32.1 Determine the twist level in each of the component
optional procedures. Verify that none of the sample rolls does
strands as directed in Test Method D 1423 upon five test
not contain more than the allowable number of pieces. Total the
specimens of warp yarn and five test specimens of filling yarn
yardages for each of the rolls measured and compare the total
horn each of the rolls in the laboratory sample.
to the total of the yardages specified on the identification labels
33. Weave ‘&pe for those rolls. In case of dispute, use Option A of Test Methods
D 3773 to resolve the dispute.
33.1 Determine the weave type as directed in Specification
D 579 using one test specimen from each of the rolls in the 39. Ignition Loss
laboratory sample. 39.1 Determine the ignition loss as directed in Test Method
D 4963, unless otherwise agreed to between the purchaser and
34. Length Per Unit Mass
the supplier.
34.1 Determine the length per unit mass in yards per pound
or tex of the tape or webbing as directed in Test Method 40. Viiual Appearance
D 1059, using a skein length of 2 m (2 yd) for each specimen 40.1 Determine the visual appearance as directed in Speci-
and three specimens from each of the selected rolls in the fication D 579 on each of the rolls in the lot sample.
laboratory sample excepti
41. Put-Up, Packaging, and Marking
34.1.1 A length of tape or webbing 2.5 m (2Y2 yd) long from
each laboratory sample shall be smoothly laid on a flat surface 41.1 During the sampling and testing of the shipment, verify
using sufbcient tension to keep the sample flat. A specimen 2 m the correctness of put-up, packaging, and marking.
(2 yd) long shall be accurately measured from the center of this CONFORMANCE AND KEYWORDS
piece and cut off with a sharp instrument. The 2 m (2 yd)
specimen shall then be weighed. 42. Conformance
42.1 The purchaser and the supplier may agree on a proce-
35. Thickness dure to establish conformance, including control charts fur-
35.1 Determine the thickness of the tape or webbing as nished by the supplier, a sequential sampling plan, ordouble-
directed in Test Method D 1777 using ten test specimens from sampling plan outlined in 42.2.
each roll in the laboratory sample and using the gage with a 42.2 In the absence of a control chart or sequential sampling
presser foot with a diameter of 6.35 t 0.03 mm (0.25 t 0.001 plan, proceed as directed in 42.2.1-42.2.3.
in.) that is weighted to apply a total load of 5.5 t 0.5 N (20 +/– 42.2.1 If the test results for a lot conform to the require-
2 oz-force or a pressure of 158 to 186 kPa (23 to 27 psi), unless ments for all characteristics listed in Sections 5-23, and Tables
otherwise specified. 7-3, the lot shall be considered acceptable.
42.2.2 If the test results for one or more characteristics do
36. Breaking Strength not conform to the requirements, take a new laboratory sample
36.1 Determine the breaking strength in newtons or pounds- from either the original lot sample or a new lot sample. Test the
force of tape or webbing in the warp direction as directed in new sample for the characteristic(s) that did not conform to the
Test Method D 5035, excluding preconditioning using five requirements in the first test and average the results of the first
specimens fkom each of the rolls in the laboratory sample. Test and second samples as if they were one test of double the
tapes and webbings 38 mm (1V2 in.) and under in width in full original number of specimens. If the new average(s) con-
width. Test tapes and webbings over 38 mm (1 Y2 in.) in width form(s) to the specified requirements, the lot shall be consid-
by the raveled-strip method in accordance with Test Method ered acceptable.

6
 (W D 580

42.2.3 If the test results obtained as directed in 42.2.2 do not 43. Keywords
conform to the specitied requirements, the lot shall be consid- 43.1 appearance; breaking stren@, construction designa-
ered unacceptable. tion, fabric coun~ glass tapes; glass webbings; ignition loss
(organic content); len*, thickness

SUMMARY OF CHANGES

The following are changes since the last revision (3) Deleted reference to MIL-STD 105D. Added reference to
(1) Updated instructions for use of S1 units. ANSI/ASQC Z1.4.
(2) Changed conditioning reference to Practice D 1776.

The American Society for Testing and Materials takes no position respecting the validity of anypatent rights asserted in cwrnedon
with any item mentioned in this s.%ndanf. Users of this standard are expressly advised that detennination of the validity of any such
patent rights, and the risk of infringement of such rights, are entirely their own responsibility

This standard is subject to revision at anytime by the responsible technical committee and must be reviewed every five years and
if not revised, either reapproved or withdm wn. Your comments are invited either for revision of this standant or for additional standards
and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible
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views known to the ASIM Committee on Standards, 100 Sarr Harbor Drive, West Conshohocken, PA 19428.