THERMAL RECOVERY ARTICLE USING LINEAR POLYOLEFIN

摘要

PROBLEM TO BE SOLVED: To obtain a thermal-recovery article which has both high shrinkage and excellent fit to an adherend and shows good resistance to shifts when it is used and good resistance to cracks even when it is used at high temperatures and exert high water resistance due to a specific hot melt adhesive in the internal layer. SOLUTION: (1) A thermal-recovery article, especially a heat-shrinkable tube is based on a resin composition containing (a) 20-80 pts.wt. of a linear polyolefin having a crystal melting temperature of 60-100 deg.C and (b) 20-80 pts.wt. of a linear polyolefin having a crystal melting temperature of 110-135 deg.C. (2) It has an adhesive composition layer formed inside. (3) The adhesive composition contains (A) 0.1-50 pts.wt. of a terpolymer of a carboxylic group-containing monomer or acid anhydride group-containing monomer, a polarα-olefin and a nonpolarα-olefin, (B) 0-80 pts.wt. of a copolymer of ethylene and a nonpolarα-olefin or a polyolefin resin comprising a nonpolarα-olefin and 20 wt.% or less of a polarα-olefin and (C) 10-90 pts.wt. of a polyamide and its MI is 5-500. (4) The adhesive composition is irradiated with electron ray beforehand in 50-400 kGy.