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DSM Arnitel® UM551-V 55 Shore D, Flame Retardant (halogen-, phosphorous-free) 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	1.28 g/cc	0.0462 lb/in³	ISO 1183
Water Absorption	0.6 %	0.6 %	Sim. to ISO 62
Moisture Absorption at Equilibrium	0.25 %	0.25 %	Humidity Absorption; Sim. to ISO 62
Mechanical Properties
Tensile Strength, Yield	16.5 MPa	2390 psi	ISO 527-1/-2
Elongation at Break	Min 50 %	Min 50 %	ISO 527-1/-2
Elongation at Yield	20 %	20 %	ISO 527-1/-2
Tensile Modulus	0.25 GPa	36.3 ksi	ISO 527-1/-2
Charpy Impact, Notched	NB	NB	23°C; ISO 179/1eA
Electrical Properties
Comparative Tracking Index	600 V	600 V	IEC 60112
Thermal Properties
Melting Point	200 °C	392 °F	10°C/min; ISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi)	85 °C	185 °F	ISO 75-1/-2
Vicat Softening Point	90 °C	194 °F	50°C/h 50N; ISO 306
Descriptive Properties
Film Extrusion	Yes
Flame retardant	Yes
Flame retarding agent	Yes
Heat stabilized or stable to heat	Yes
High impact or impact modified	Yes
Injection Molding	Yes
Light stabilized or stable to light	Yes
U.V. stabilized or stable to weather	Yes
Without fillers	Yes