Patent ID: 6592957
Filing Date: 2003-07-15
Classification: B32B,F16L,Y10T

Abstract:
A multi-layer hose for automobile cooling systems comprising at least two layers of inner layer and outer layer wherein:(1) the material for inner layer is a composition which comprises a polymer containing a carboxyl group and/or its derivative group in the molecule and a thermoplastic elastomer, the content of the polymer containing a carboxyl group and/or its derivative group thereof in the molecule being 5-50% by weight based on the total weight of the composition, and (2) the material for outer layer comprises a polyamide thermoplastic resin, wherein said thermoplastic elastomer of the composition for the inner layer is a dynamically crosslinked olefin thermoplastic elastomer which comprises (A) 10-90 parts by weight of an ethylene-&agr;-olefin copolymer comprising ethylene and an &agr;-olefin of 3-12 carbon atoms which is produced using a metallocene catalyst and (B) 90-10 parts by weight of a propylene resin (total amount of (A) and (B) being 100 parts by weight).