EPDM Ethylene Propylene Diene Monomer

EPDM Ethylene Propylene Diene Monomer
EPDM
Ethylene Propylene Diene Monomer
Description
EPDM-based TPV compounds with excellent elastomeric properties and superior
compression set, designed for injection moulding and co-moulding onto polyolefines.
They have excellent UV stability and good oil resistance. They have a remarkable
range of hardnesses, excellent performance at low temperature and high temperature
resistance. The material has an almost white base colour allowing a very wide colour
range.
Applications
Car interiors including trims and seals, home furnishings, domestic electrical
appliances, pipes, belts, gaskets, footwear.
Types of grade available
Shore A 40 - 80
Translucent grades with excellent electrometric properties.
Opaque grades with excellent al-round properties
Co-moulding high flow grades
Transparent grades
High temperature grades
Hard grades with high modulus
General Processing
Drying Time
Drying Temperature
Type of Drier
Purging
Moisture Absorption
Other Considerations
2 hours
80 Deg C
N/A
DYNAPURGE K
Yes
Easy to process with short moulding cycles
Processing Injection Moulding
Barrel Settings
170°C - 220°C for larger parts 260°C maybe required.
Injection speed
Medium to High
Injection Pressure
350 to 1500 kg/cm2
Back Pressure
Low to Medium
Screw Speed
25 to 75 rpm
Tool Temperature
35-65 °C
175-200C
Melt Temperature
Processing Stability
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Excellent
Information Sheet 1
Gate Considerations
Due to the flexibility of EPDM small gates can be used such
as sub gates and pin gates
Sprue
&
Runner The sorter the land length the better and use full round
Considerations
runners.
Processing Extrusion
Barrel Settings
Screw Speed
Screen Packs
Haul-off / Cooling
Calibration
Physical Properties
Density
Shore A
Tear strength – KN/m
Elongation at Break
Compression set
72 hrs @23c
Tensile Strength – MPa
Shrinkage
Flammability
Flammability Rating
160 - 210°C
50- 100 rpm
Materials are generally nib free. Breaker plate/screens for
higher back pressure and therefore smoother profile surface
Water bath chilled 10c
No, but supporting inner pressure if hollow profiles.
1.04
40
640%
36%
1.09
70
25
678%
37%
1.16
55
6000%
46
1.08
80
28
680%
35%
16
7.8
5.0
8.2
0.7% - 1.2% for medium grades and from 1.0% to 2.2%
for very soft unfilled grades
Not Flame Retardant
Weatherability
Suitability for outdoor YES
use
Fillers & Additives
Chemical Resistance
Resistant to
Not resistant to
Plasticiser into eb phase, Reinforcing polymers, Fillers &
and other modifying agents,
Alcohol, Detergents, Bases, Acids (except concentrated
Nitric Acid), Water
Aliphatic Hydrocarbons, Mineral Oils (bit superior to
SEBS), Fatty Foods
Food Contact Status
Suitable for food contact
Colouring
Easily coloured using universal masterbatches
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Information Sheet 2
REACH &
Compliance
ROHS Yes
Bonding
Can be bonded using a urethane based adhesive
Welding
Can be welded by hot plate welding or high frequency
welding
This information has been provided as a general guide and we suggest that you carry
out your own specific tests to be sure that this material is suitable for your
application.
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Information Sheet 3
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