F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 21/06 (2006.01) B32B 1/08 (2006.01) B32B 27/34 (2006.01)
Patent
CA 2507920
Multilayered polyamide composite articles comprising at least three layers that comprise aliphatic and semi-aromatic polyamides and that is better able to retain its mechanical properties at high temperatures and over long times are disclosed. Layers comprising aliphatic polyamides may optionally contain oxidation stabilizers. The articles may be in the form of tubes incorporated into a heat exchanger. Processes for their preparation are also provided.
L'invention a trait à des articles composites en polyamide multicouches, qui comprennent au moins trois couches renfermant des polyamides aliphatiques et semi-aromatiques, et dont les propriétés mécaniques sont mieux préservées à des températures élevées et sur de longues périodes. Les couches qui contiennent des polyamides aliphatiques peuvent éventuellement renfermer des stabilisateurs contre l'oxydation. Les articles selon l'invention peuvent se présenter sous forme de tubes intégrés dans un échangeur thermique. L'invention concerne également des procédés de préparation desdits articles.
Bennett Jones Llp
E. I. Du Pont de Nemours And Company
E.i. Du Pont de Nemours And Company
LandOfFree
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