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Soft thermoplastic elastomer grades

03 September 2007

To meet growing demand for soft oil- and heat-resistant elastomers delivering the cost and design benefits of thermoplastic processing, DuPont Engineering Polymers is extending its range of such materials.

The new offerings include three new grades of DuPont ETPV engineering thermoplastic vulcanizate, and a new grade of DuPont Hytrel thermoplastic polyester elastomer. They can all 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.

New 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 150ºC service, which is about 20ºC higher than most other Hytrel grades.

New DuPont ETPV 95A02HS BK001 and 95A02 NC010 grades 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 3000 hours at 150ºC and a standard natural grade (…NC010) for less demanding requirements.

Two other recent DuPont ETPV additions have hardness values of 70 and 80 Shore A. Earlier grades in the DuPont ETPV product line have Shore A values of 60 and 90.

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