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08. October 2007

Soft TPE grades for “under-the-hood” applications

From DuPont Engineering Polymers come three new soft TPE grades for under the hood applications.

The range includes three new grades of ETPV engineering thermoplastic vulcanisate and a new grade of Hytrel thermoplastic polyester elastomer. All of them can withstand under-the-hood automotive conditions and high-temperature industrial environments. Typical applications include extruded hose and tubing, blow moulded air ducts and injection moulded seals and body plugs.

Hytrel AC801 NC010 is much softer than any other grade of Hytrel and has improved heat resistance. Its nominal hardness is Shore A 80, and it is rated for 150 °C service, which is about 20 °C higher than most other Hytrel grades.
ETPV 95A02HS BK001 and 95A02 NC010 grades are said to provide outstanding processing stability in profile extrusion and in blow moulding, of air ducts for example. The two versions are a black heat-stabilised grade (…BK001) rated for 3,000 hours at 150 °C and a standard natural grade (…NC010) for less demanding requirements.
Two other recent ETPV additions in DuPont’s portfolio have hardness values of 70 and 80 Shore A. Earlier grades in the ETPV product line have Shore A values of 60 and 90.

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