US 2003/0118766 A1 · Fuel tube

Abstract

A fuel tube having an ethylene-vinyl alcohol copolymer (EVOH) layer formed of an EVOH-based extruded EVOH material, and a modified HDPE layer formed of an extruded HDPE material which is based on modified high density polyethylene (modified HDPE) or is based on a polymer alloy containing mainly modified HDPE. The modified HDPE is a dicarboxylic acid-modified material having a melt mass flow rate value (190° C.: JIS K 7210) of about 0.2 to 10.0 g/10 min. The interlayer adherability between the EVOH layer 14 and the modified HDPE layer 16 is maintained while maintaining the anti-fuel permeability and the flexibility of the fuel tube 12.

Claims12

Dependent claims

A multi-layered resin tube for a fuel, which comprising:

an ethylene-vinyl alcohol copolymer (hereinafter, referred to as “EVOH”) layer formed of an EVOH-based extruded EVOH material, and a HDPE layer formed of an extruded HDPE material which is contacted with an outer side of the EVOH layer and is based on modified HDPE, or based on a polymer alloy containing mainly modified HDPE,
wherein the modified HDPE is selected from dicarboxylic acid-modified materials satisfying the requirement of a melt mass flow rate (hereinafter, referred to as “MFR”) value (190° C.;
JIS K 7210) of about 0.02 to 10.0 g/10 min.

Dependencies are inferred from the claim text.

Fuel tube

Life of this patent

Fuel tube

Life of this patent

Abstract

Claims12