Patent ID: 7140395
Filing Date: 2006-11-28
Classification: F16L,Y10T

Abstract:
1. A brake hose including reinforcing layers in a rubber base, the brake hose comprising: an inner tube rubber layer that is made of a first rubber material and has a flow path for flowing fluid; a lower yarn layer formed by braiding first yarns made of a first yarn material around the inner tube rubber layer; an intermediate rubber layer that is made of a second rubber material and covers the lower yarn layer; an upper yarn layer formed by braiding second yarns made of a second yarn material around the intermediate rubber layer and; a cover rubber layer that is made of a third rubber material and covers the upper yarn layer, wherein each of the first and second rubber material is a blend in which 40 to 80 wt % is an isobutylene-isoprene copolymer (IIR) and, 20 to 60% is an ethylene-propylene-diene copolymer (EPDM), the first yarn material is polyethylene terephthalate (PET), with a tensile strength per unit decitex of at least 6.5 g, and 2.7 g elongation of 2.6±1%, and the second yarn material is polyvinyl alcohol (PVA).