Patent ID: 6887539
Filing Date: 2005-05-03
Classification: B29C,B29K,H01B,Y10T

Abstract:
1. A heat shrinkable tube formed of a polyolefin resin composition, wherein said polyolefin resin composition comprises: (A) 60% or more of middle to high density polyethylene defined in the following ranges: (B) phenol resin-based antioxidant, (C) sulfur-based antioxidant, and (D) zinc oxide, and, said polyolefin resin composition is formed into a tube, then, cross-linked by irradiation by an electron beam, and the tube is expanded in diameter at temperatures of not lower than softening point, said expanded tube having a concentricity of 25% or less, where the concentricity is equal to (maximum wall thickness−minimum wall thickness)/maximun wall thickness×100.