PURPOSE: To obtain a raw material for a laminated tube equipped with proper rigidity and dead fold properties in spite of a transparent material using no metal foil or paper and having beautiful printing appearance by forming a multilayer laminated sheet wherein an outer surface layer is composed of a longitudinally uniaxially rolled multilayer film and an inner surface layer is composed of a polyethylene layer.
CONSTITUTION: A surface layer is composed of low density polyethylene or linear low density polyethylene 1. High density polyethylene 2 is pref. as an intermediate layer material because it imparts sufficient rigidity and dead fold properties to a tube but a polyester resin, a polyamide resin, a propylene resin or an ethylene/vinyl alcohol copolymer can be also used. As an ethylene/vinyl alcohol copolymer layer 5, a resin layer having good gas barrier properties composed of polyester, polyamide, polyacrylonitrile or polycarbonate and other arbitrary resin layer are provided between the outer surface layer 4 and an inner surface layer. This raw material for a laminated tube obtains dead fold properties necessary for the laminated tube from a longitudinally uniaxially rolled multilayer tube and a metal foil or paper damaging transparency is not used.
SUGIYAMA TAKUJI