TECHNICAL DATA SHEET
GRILON T XE 3024 NATURAL
General product description
Grilon T XE 3024 natural is an unreinforced Poly-
amid 66 injection moulding grade with very high
impact strength particularly in the "dry as mould-
ed" state.
Additionally, Grilon T XE 3024 has been specifi-
cally developed to comply with the requirements
of DIN EN 71-3, DIN EN 71-9, ISO 8124-3 and
the applicable requirements of EU Directive
2009/48/EC regarding the safety of toys.
Grilon T XE 3024 is a special product made to
order. Minimum delivery quantity is 1200 kg.
Grilon T XE 3024 can be supplied color com-
pounded, subject to certain conditions.
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PROPERTIES
Mechanical Properties
Grilon T XE 3024
Standard Unit State
natural
dry 2000
Tensile E-Modulus 1 mm/min ISO 527 MPa
cond. 900
dry 50
Tensile strength at yield 50 mm/min ISO 527 MPa
cond. 35
dry 6
Elongation at yield 50 mm/min ISO 527 %
cond. 30
dry 45
Tensile strength at break 50 mm/min ISO 527 MPa
cond. 35
dry > 50
Elongation at break 50 mm/min ISO 527 %
cond. > 50
2 dry no break
Impact strength Charpy, 23°C ISO 179/1eU kJ/m
cond. no break
2 dry no break
Impact strength Charpy, -30°C ISO 179/1eU kJ/m
cond. no break
2 dry 60
Notched impact strength Charpy, 23°C ISO 179/1eA kJ/m
cond. No break
2 dry 20
Notched impact strength Charpy, -30°C ISO 179/1eA kJ/m
cond. 20
dry 93
Ball indentation hardness ISO 2039-1 MPa
cond. 56
Thermal Properties
Melting point DSC ISO 11357 °C dry 260
Heat deflection temperature HDT/A 1.80 MPa ISO 75 °C dry 65
Heat deflection temperature HDT/B 0.45 MPa ISO 75 °C dry 150
-6
Thermal expansion coefficient long. 23-55°C ISO 11359 10 /K dry 130
-6
Thermal expansion coefficient trans. 23-55°C ISO 11359 10 /K dry 130
Maximum usage temperature long term ISO 2578 °C dry 90-100
Maximum usage temperature short term EMS °C dry 200
Electrical Properties
dry 37
Dielectric strength IEC 60243-1 kV/mm
cond. 32
Comparative tracking index CTI IEC 60112 - cond. 600
14
dry 10
Volume resistivity IEC 60093 Ω ·m 13
cond. 10
12
dry 10
Specific surface resistivity IEC 60093 Ω 11
cond. 10
General Properties
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Density ISO 1183 g/cm dry 1.07
IEC 60695-11-
Flammability (UL94) 0.8 mm rating - HB
10
Water absorption 23°C/sat. ISO 62 % - 6
Moisture absorption 23°C/50% RH ISO 62 % - 1.5 - 2
Linear mould shrinkage long. ISO 294 % dry 2.2
Linear mould shrinkage trans. ISO 294 % dry 1.8
Product-nomenclature: ISO 16396-PA66-I,,M1,C14-020
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Information for the injection moulding of Grilon T XE 3024 natural
This technical data sheet for Grilon T XE 3024 Drying temperature
natural provides you with useful information on Polyamides are affected by oxidation at tempera-
material preparation, machine requirements, tures above 80°C in the presence of oxygen.
tooling and processing. Visible yellowing of the material is an indication of
oxidation. Hence temperatures above 80°C for
MATERIAL PREPARATION desiccant dryers and temperatures above 100°C
for vacuum ovens should be avoided. In order to
Grilon T XE 3024 natural is delivered dry and detect oxidation it is advised to keep a small
ready for processing in sealed, air tight packag- amount of granulate (light colour only!) as a com-
ing. Pre-drying is not necessary provided the parison sample.
packaging is undamaged.
At longer residence times (over 1 hour) hopper
Storage heating or a hopper dryer (80°C) is useful.
Sealed, undamaged bags can be kept over a
long period of time in storage facilities which are Use of regrind
dry, protected from the influence of weather and Grilon T XE 3024 natural is a thermoplastic mate-
where the bags can be protected from damage. rial. Hence, incomplete mouldings as well as
sprue and runner can be reprocessed. The fol-
Handling and safety lowing points have to be observed:
Detailed information can be obtained from the
§ No thermal degradation in the previous pro-
“Material Safety Data Sheet” (MSDS) which can
cessing
be requested with every material order.
§ No contamination through foreign material,
dust, oil, etc.
Drying § Regrind has to be dry and dust-free
Grilon T XE 3024 natural is dried and packed
with a moisture content of less than 0.10 %. When adding regrind, special care has to be
Should the packaging become damaged or the taken by the injection molder. For high-quality
material is left open too long, then the material technical parts only virgin material has to be
must be dried. Too high moisture content can be used.
shown by a foaming melt and silver streaks on
the moulded part.
MACHINE REQUIREMENTS
The drying can be done as follows:
Grilon T XE 3024 natural can be processed eco-
Desiccant dryer nomically and problem-free on all machines suit-
able for polyamides.
Temperature: max. 80°C
Time: 4 - 12 hours
Dew point of the dryer: at least -25°C Screw
Wear protected, universal screws with shut-off
Vacuum oven nozzles are recommended (3 zones).
Temperature: max. 100°C Screw
Time: 4 - 10 hours
Length: 18 D - 22 D
Compression ratio: 2 - 2.5
Circulating air drying ovens are not suitable for
Grilon. To review / monitor the effective moisture
content it is recommended to use a moisture Shot volume
measuring device (eg Aboni or Aquatrac). The metering stroke must be longer than the
length of the back flow valve (without decom-
Drying time pression distance).
If there is only little evidence of foaming of the Selecting the injection unit
melt or just slight silver streaks on the part, then
the above mentioned minimal drying time will be Shot volume = 0.5 - 0.8 x
sufficient. If material is stored open for days, max. shot volume
shows strong foaming, unusually easy flow,
streaks or a rough surface on the moulded part,
then the maximum drying time is required. Heating
We recommend at least three separately control-
Silver streaks can also be caused by lable heating zones, capable of reaching cylinder
! overheating of the material (over
320°C) or by too long melt residence
temperatures up to 350°C. Separate nozzle
heating is necessary. The cylinder flange tem-
time in the barrel. perature must be controllable (flange, intake).
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Nozzle PROCESSING
Open nozzles with accurate heating are to pre-
fer. There is however the danger that during Basic machine settings
screw retraction after metering air maybe drawn In order to start up the machines for processing
into the barrel. If shut-off nozzles are used high Grilon T XE 3024 natural, following basic settings
frictional heat and pressure loss have to be can be recommended:
avoided. Axial sliding shut-off nozzles are not Temperatures
suitable.
Flange 60 - 80°C
Clamping force Zone 1 260 - 270°C
As a rule of thumb the clamping force can be Zone 2 270 - 280°C
estimated using the following formula: Zone 3 280 - 290°C
Nozzle 280 - 290°C
Clamping force Tool 80°C
Melt 270 - 300°C
1) 2
7.5 kN x projected area (cm )
1)
in cavity pressure of 750 bar Pressures / Speeds
Hold-on pressure (spec.) 300 - 800 bar
Dynamic pressure (spec.) 50 - 150 bar
TOOLING
Screw speed 0.05 - 0.3 m/s
The design of the mould tool should follow the
general rules for unreinforced thermoplastics.
CUSTOMER SERVICES
For the mould cavities common mould tool steel
quality (e.g. hardened steel) which has been EMS-GRIVORY is a specialist for polyamide
hardened to level of 56 HRC is necessary. synthesis and polyamide processing. Our cus-
tomer services are not only concerned with the
Demoulding / Draft angle manufacturing and supply of engineering ther-
A draft between 1 - 2° is common for polyamide moplastics but also provide full technical support
injection moulding tools. As a rate of thumb for including:
structured cavities the following can be applied:
Maximum 0.02 mm depth of roughness for 1° of • Rheological design calculation / FEA
draft. • Prototype tooling
• Material selection
Gate and runner • Processing support
To achieve an optimal mould-fill and to avoid sink • Mould and component design
marks, a central gate at the thickest section of
the moulding is recommended. Pin point gate We are happy to advice you. Simply call one of
(direct) or tunnel gates are more economical and our sales offices.
more common with technical moulding.
To avoid premature solidification of the melt and
difficult mould filling, the following points should The information contained in this publication is based
be considered: on our present knowledge and experience. The given
figures and data are guidance values and do not rep-
resent binding material specifications. No warranties of
Gate diameter any kind, either express or implied, including warran-
ties of merchantability or fitness for a particular pur-
0.8 x thickest wall section of the injection
pose, are given regarding products, design, data and
moulding part information. The customer is not released from his
obligation to investigate the products fitness and the
suitability for the intended application, compliance with
Runner diameter legal requirements and intellectual property rights. We
reserve the right to change the information at any time
1.4 x thickest wall section of the injection and without prior notice. The information in this publi-
moulding part (but minimum 4 mm) cation is not to be considered a contractual obligation
and any liability whatsoever is expressly declined. For
further questions about our products please contact
our experts.
VENTING
In order to prevent burning marks and improve Generated: WIS / 05.2017
weld line strength, proper venting of the mould
cavity should be provided (venting channels on This version replaces all previous product specific data
the parting surface dimensions: Depth 0.02 mm, sheets.
width 2 - 5 mm). www.emsgrivory.com
