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DSM Arnitel® PM381 38 Shore D, 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 PropertiesMetricEnglishComments
Density1.16 g/cc0.0419 lb/in³ ISO 1183
Water Absorption7 %7 % Sim. to ISO 62
Moisture Absorption at Equilibrium0.4 %0.4 % Humidity Absorption; Sim. to ISO 62
Melt Flow4.64 g/10 min4.64 g/10 min Calculated from Volume Flow Rate of 4 cm3/10 min, 2.16 kg, 230°C; ISO 1133

Mechanical Properties
Hardness, Shore D3333 3 s; ISO 868
Tensile Strength at Break13.1 MPa1900 psi ISO 527-1/-2
Tensile Strength, Yield10.9 MPa1580 psi Stress at 100% Strain; ISO 527-1/-2
Tensile Strength, Yield2.6 MPa377 psi Stress at 5% Strain; ISO 527-1/-2
Tensile Strength, Yield4.4 MPa638 psi Stress at 10% Strain; ISO 527-1/-2
Tensile Strength, Yield8.8 MPa1280 psi Stress at 50% Strain; ISO 527-1/-2
Elongation at Break175 %175 % ISO 527-1/-2
Tensile Modulus0.06 GPa8.7 ksi ISO 527-1/-2
Izod Impact, Notched (ISO)NBNB 23°C; ISO 180/1A
Charpy Impact, Notched, Low TempNBNB -30°C; ISO 179/1eA
Charpy Impact, NotchedNBNB 23°C; ISO 179/1eA

Electrical Properties
Volume Resistivity1e+014 ohm-cm1e+014 ohm-cm IEC 60093
Surface Resistance1e+013 ohm1e+013 ohm IEC 60093
Dielectric Constant4.44.4 1 MHz; IEC 60250
Dielectric Constant, Low Frequency4.74.7 100Hz; IEC 60250
Dielectric Strength20 kV/mm508 kV/in IEC 60243-1
Dissipation Factor0.0810.081 1 MHz; IEC 60250
Dissipation Factor, Low Frequency0.0310.031 100 Hz; IEC 60250
Comparative Tracking Index600 V600 V IEC 60112

Thermal Properties
CTE, linear 20°C150 µm/m-°C83.3 µin/in-°F Parallel; ISO 11359-1/-2
CTE, linear 20°C Transverse to Flow150 µm/m-°C83.3 µin/in-°F Normal; ISO 11359-1/-2
Melting Point212 °C414 °F 10°C/min; ISO 11357-1/-3
Vicat Softening Point145 °C293 °F 50°C/h 10N; ISO 306
Flammability, UL94HBHB 1.6 mm nominal thickness; IEC 60695-11-10

Descriptive Properties
Film ExtrusionYes 
High impact or impact modifiedYes 
Other ExtrusionYes 
Profile ExtrusionYes 
Sheet ExtrusionYes 
Without fillersYes 

 


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