TPUs geared for demanding automotive tasks

July 13, 2006
Pearlthane D11T85UV and D11T93 thermoplastic polyurethanes (TPUs) from Merquinsa NA Inc., Sparta, N.J., reportedly have met or exceeded North American Tier 1 automotive specs for gear-shift knobs and spring insulators.

Pearlthane D11T85UV and D11T93 thermoplastic polyurethanes (TPUs) from Merquinsa NA Inc., Sparta, N.J., reportedly have met or exceeded North American Tier 1 automotive specs for gear-shift knobs and spring insulators. The Pearlthane D11T85UV TPU line, based on a proprietary polycaprolactone technology, is reportedly easily overmolded in typical two-shot injection-molding applications. They also sport good wearability and scratch resistance.

The special UV resistance and colorability of this 85A Shore A TPU makes it suitable for demanding two-shot molding automotive-interior applications. It adheres well to a wide range of polar substrates such as ABS and PC. Currently, this TPE can be overmolded onto a variety of rigid substrates to provide a "leatherlike" feel, as well as resist wear and abrasion. The material ships in clear pellet form for coloring.

Pearlthane D11T93 resists oil, grease, and abrasion. Its high-temperature and hydrolysis performance versus standard polyester TPUs make it an option for elastomeric underhood applications. Additional grades will be available later this year.

MAKE CONTACT
Merquinsa NA Inc., (973) 362-1280,
www.merquinsa.com

PropertyTest Method D11T93D11T85UV
Shore A hardness ASTM D-2240 9386
Tensile strength, kpsi ASTM D-412 5.85.8
Elongation @ break, %ASTM D-412 525600
Modulus @100 % elongation, kpsi ASTM D-412 1.230.87
Modulus @300 % elongation, kpsi ASTM D-412 2.5 1.45 
Tear strength, lb/in. ASTM D-624 (Die C)685515
Compression set (70 hr @ 73° F), % ASTM D-395 2020
Compression set ( 24 hr @ 158° F), % ASTM D-395 2935
Moisture content % MQSA 44 <0.05<0.1

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