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DSM Arnitel® EL740 74 Shore D, Injection 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	Original Value		Comments
Density	1.29 g/cc		ISO 1183
Water Absorption	0.6 %		Sim. to ISO 62
Moisture Absorption at Equilibrium	0.15 %		Humidity Absorption; Sim. to ISO 62
Melt Flow	19.35 g/10 min		Calculated from Volume Flow Rate of 15 cm3/10 min, 2.16 kg, 230°C; ISO 1133
Mechanical Properties
Hardness, Shore D	72		3 s; ISO 868
Tensile Strength at Break	38 MPa		ISO 527-1/-2
Tensile Strength, Yield	24.9 MPa		Stress at 50% Strain; ISO 527-1/-2
Tensile Strength, Yield	31.2 MPa		Stress at 5% Strain; ISO 527-1/-2
Tensile Strength, Yield	34.4 MPa		Stress at 10% Strain; ISO 527-1/-2
Elongation at Break	250 %		ISO 527-1/-2
Elongation at Yield	10 %		ISO 527-1/-2
Tensile Modulus	1 GPa		ISO 527-1/-2
Izod Impact, Notched (ISO)	9 kJ/m²		23°C; ISO 180/1A
Charpy Impact, Notched, Low Temp	0.6 J/cm²		-30°C; ISO 179/1eA
Charpy Impact, Notched	1 J/cm²		23°C; ISO 179/1eA
Electrical Properties
Volume Resistivity	Min 1e+015 ohm-cm		IEC 60093
Surface Resistance	Min 1e+015 ohm		IEC 60093
Dielectric Constant	3.3		1 MHz; IEC 60250
Dielectric Strength	23 kV/mm		IEC 60243-1
Dissipation Factor	0.03		1 MHz; IEC 60250
Comparative Tracking Index	600 V		IEC 60112
Thermal Properties
CTE, linear 20°C	110 µm/m-°C		Parallel; ISO 11359-1/-2
CTE, linear 20°C Transverse to Flow	110 µm/m-°C		Normal; ISO 11359-1/-2
Melting Point	221 °C		10°C/min; ISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi)	120 °C		ISO 75-1/-2
Vicat Softening Point	160 °C		50°C/h 50N; ISO 306
Vicat Softening Point	210 °C		50°C/h 10N; ISO 306
Flammability, UL94	HB		1.6 mm nominal thickness; IEC 60695-11-10
Glow Wire Test	850 °C		Glow Wire Ignition Temperature GWIT, 1 mm; IEC 60695-2-13
Descriptive Properties
High impact or impact modified	Yes
Injection Molding	Yes
Without fillers	Yes