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News

Fibre-grade PA46 drives use of yarns in automotive V-belts

DSM Engineering Plastics (Sittard) : 23 July, 2004  (Application Story)
German company Polyamide High Performance (PHP) GmbH is using DSM Engineering Plastics
Stanylenka 460HRST fibre is primarily used in transmission and V-belts and, thanks to its high-temperature strength, in sewing thread for automotive airbags. The melting point is 30C higher than alternative PA66 grades.

V-belts made of the high-strength Stanylenka offer a lower system cost in power transmission systems, since the yarn's very low creep and self-tensioning characteristics in this application allow the belts to be used without a tensioner.

“Stanylenka is the first new development in industrial polyamide yarns in 25 years,” said Volker Siejak, Managing Director of Polyamide Heavy for PHP. “It has key properties like better modulus performance at elevated temperature and a higher melting point that simply cannot be met with PA66 yarns.”

DSM’s Stanyl is a high-temperature-resistant polymer used both in fibre and engineering plastic applications. Stanyl KS411 has been reintroduced to the fibre intermediates market and is readily available from DSM Engineering Plastics as a raw material for melt spun fibres.

“With KS411, DSM expands its range of specialty polymers for performance applications,” said Harry Henssen, global business manager for Stanyl for DSM Engineering Plastics. “KS411 is a copolymer grade of Stanyl designed specifically for fibre production, with low creep, high shrink forces and strength.”

Stanyl is a clean polymer that does not release oligomers during spinning and it also exhibits self-cleaning behaviour in spinning, as the chemical structure prevents gel formation. The high melting point of Stanyl polymer, coupled with its morphology, result in a special combination of yarn properties that include a superior shrinkage force over shrinkage ratio, excellent dimensional stability, good chemical resistance, good adhesion to rubber, low creep at elevated temperatures, superior softness and resilience, excellent abrasion resistance, and excellent dyeability.

Stanyl is the polyamide with the highest heat capacity, crystallinity and crystallisation rate commercially available for fibres and is marketed exclusively by DSM.
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