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DSM Arnitel® EL740-H/A Injection Molding; Other Extrusion 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	1.27 g/cc	0.0459 lb/in³	ISO 1183
Water Absorption	0.6 %	0.6 %	Sim. to ISO 62
Moisture Absorption at Equilibrium	0.15 %	0.15 %	Humidity Absorption; Sim. to ISO 62
Mechanical Properties
Tensile Strength, Yield	34 MPa	4930 psi	Stress at 10% Strain; ISO 527-1/-2
Elongation at Break	250 %	250 %	ISO 527-1/-2
Elongation at Yield	20 %	20 %	ISO 527-1/-2
Tensile Modulus	1.1 GPa	160 ksi	ISO 527-1/-2
Charpy Impact, Notched, Low Temp	0.4 J/cm²	1.9 ft-lb/in²	-30°C; ISO 179/1eA
Charpy Impact, Notched	1 J/cm²	4.76 ft-lb/in²	23°C; ISO 179/1eA
Thermal Properties
CTE, linear 20°C	110 µm/m-°C	61.1 µin/in-°F	Parallel; ISO 11359-1/-2
CTE, linear 20°C Transverse to Flow	110 µm/m-°C	61.1 µin/in-°F	Normal; ISO 11359-1/-2
Melting Point	220 °C	428 °F	10°C/min; ISO 11357-1/-3
Flammability, UL94	HB	HB	1.6 mm nominal thickness; IEC 60695-11-10
Descriptive Properties
Heat stabilized or stable to heat	Yes
High impact or impact modified	Yes
Injection Molding	Yes
Other Extrusion	Yes
Without fillers	Yes