| 摘要 |
PURPOSE:To obtain a heat-shrinkable tube capable of covering and hermetically sealing various cover members and excellent in heat resistance and adhesive capacity by forming the heat-shrinkable tube so as to have a double-layer structure consisting of an outer layer composed of crosslinked polyethylene and an inner layer composed of a carboxyl group-containing ethylene copolymer. CONSTITUTION:As an outer layer material, polyolefin crosslinkable by electron beam crosslinking, chemical crosslinking or water crosslinking such as polyethylene, silane grafted polyethylene or a copolymer based on ethylene compd. is used. As an inner layer material, a carboxyl group-containing ethylene/ butene-1 copolymer and/or an ethylene/propylene copolymer and an ethylene/ methacrylic acid/acrylic ester copolymer are pref. used. A tube having a double- layer structure is molded using the outer and inner layer materials and, after the outer layer thereof is crosslinked, the tube is expanded in its diameter to obtain a heat-shrinkable tube. |
