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DSM Arnitel® EM402-L Injection Molding; Coating Grade Copolyester Elastomer (North America)

Subcategory: Elastomer, TPE; Polyester TPE; Polymer; Thermoplastic

Material Notes:
Product description: Arnitel® combines the advantages of engineering thermoplastics, being easy to process with excellent mechanical properties, at the same time with the flexibility of rubbers.

Arnitel does not require vulcanization. This leads to substantial reductions in part cost. Arnitel can be used over a wide range of temperatures. Arnitel has exceptional fatigue, creep resistance and resistance to oils, greases and many other chemicals.

Characteristics of Arnitel:

• Excellent strength over a wide range of temperatures
• Excellent dynamic properties e.g. creep and fatigue
• High heat resistance
• Exceptional resistance to oils and greases
• Good chemical resistance
• High degree of versatility in processing
• Easy coloring using masterbatches
• Surface quality from high gloss to textured
• Excellent heat resistance (long term 165°C)
• Good electrical insulation properties
• Low moisture absorption, excellent dimensional stability
• Easy flow, fast cooling times

Typical Applications:

• Automotive: Arnitel® is extensively used in the automotive industry for applications requiring exceptional fatigue resistance and resistance to oil and greases. Examples are: Rack and Pinion Bellows, Constant Velocity Joint Boots (CVJ Boots), Air brake tubings.
• Arnitel in the Electronic and Consumer Goods Industry: Arnitel® finds enormous potential and is also widely used in the consumer electronics by some of the world's best companies. Arnitel® is the best choice for low noise gears where their exceptional processability without any defects such as flash, makes it the material solution of choice. Arnitel® is also used in highly demanding applications such as in mobile phone antennas.

Arnitel® has exceptional flexibility and can perform or even outperform functions that normally require conventional rubbers. Available in a wide range of hardnesses, Arnitel can replace metals, thermoplastics, leather and rubber, often with a reduction in finished part costs.

Information provided by DSM.

Physical Properties	Metric	English	Comments
Density	1.1 g/cc	0.0397 lb/in³	ISO 1183
Water Absorption	0.7 %	0.7 %	Sim. to ISO 62
Moisture Absorption at Equilibrium	0.3 %	0.3 %	Humidity Absorption; Sim. to ISO 62
Melt Flow	33 g/10 min	33 g/10 min	Calculated from Volume Flow Rate of 30 cm3/10 min, 2.16 kg, 230°C; ISO 1133
Mechanical Properties
Hardness, Shore D	36	36	3 s; ISO 868
Tensile Strength at Break	25 MPa	3630 psi	ISO 527-1/-2
Tensile Strength, Yield	2.4 MPa	348 psi	Stress at 5% Strain; ISO 527-1/-2
Tensile Strength, Yield	3.9 MPa	566 psi	Stress at 10% Strain; ISO 527-1/-2
Tensile Strength, Yield	6.9 MPa	1000 psi	Stress at 50% Strain; ISO 527-1/-2
Tensile Strength, Yield	7.5 MPa	1090 psi	Stress at 100% Strain; ISO 527-1/-2
Elongation at Break	Min 300 %	Min 300 %	ISO 527-1/-2
Elongation at Yield	74 %	74 %	ISO 527-1/-2
Tensile Modulus	0.05 GPa	7.25 ksi	ISO 527-1/-2
Izod Impact, Notched (ISO)	NB	NB	23°C; ISO 180/1A
Izod Impact, Unnotched Low Temp (ISO)	NB	NB	-40°C; ISO 180/1A
Izod Impact, Unnotched Low Temp (ISO)	NB	NB	-20°C; ISO 180/1A
Charpy Impact, Notched, Low Temp	NB	NB	-30°C; ISO 179/1eA
Charpy Impact, Notched	NB	NB	23°C; ISO 179/1eA
Tensile Impact Strength	218 kJ/m²	104 ft-lb/in²	23°C; ISO 8256/1
Graves Tear Strength	60 kN/m	342 pli	without nick; ISO 34
Electrical Properties
Volume Resistivity	5e+014 ohm-cm	5e+014 ohm-cm	IEC 60093
Surface Resistance	Min 1e+015 ohm	Min 1e+015 ohm	IEC 60093
Dielectric Constant	4	4	1 MHz; IEC 60250
Dielectric Constant, Low Frequency	4.1	4.1	100Hz; IEC 60250
Dielectric Strength	20 kV/mm	508 kV/in	IEC 60243-1
Dissipation Factor	0.017	0.017	1 MHz; IEC 60250
Dissipation Factor, Low Frequency	0.001	0.001	100 Hz; IEC 60250
Comparative Tracking Index	600 V	600 V	IEC 60112
Thermal Properties
CTE, linear 20°C	220 µm/m-°C	122 µin/in-°F	Parallel; ISO 11359-1/-2
CTE, linear 20°C Transverse to Flow	220 µm/m-°C	122 µin/in-°F	Normal; ISO 11359-1/-2
Melting Point	195 °C	383 °F	10°C/min; ISO 11357-1/-3
Vicat Softening Point	140 °C	284 °F	50°C/h 10N; ISO 306
Glass Temperature	-78 °C	-108 °F	10°C/min; ISO 11357-1/-2
Flammability, UL94	HB	HB	1.6 mm nominal thickness; IEC 60695-11-10
Descriptive Properties
Coating	Yes
High impact or impact modified	Yes
Injection Molding	Yes
U.V. stabilized or stable to weather	Yes
Without fillers	Yes