| 摘要 |
PURPOSE:To obtain a suitable easy-open performance by constituting it of a high density polyethylene seal layer, ethylene-propylene random copolymer adjacent layer, metal foil barrier layer and the outermost layer of polypropylene. CONSTITUTION:High density polyethylene of being 0.95 or more is used for a seal layer, and ethylene-propylene random copolymer of ethylene content of 1 - 10% is adapted to an adjacent layer, and the high density polyethylene and the ethylene-propylene random copolymer are made into a sheet by co- extrusion. Metal foil for forming a barrier layer used herein is of a type wherein the thickness is 50 - 200mum and the constitution is made of for example aluminum, zinc or the like, and for the outermost polypropylene, random or block- typed copolymer or the like with homo or ethylene is employed selectively in accordance with the use. The barrier layer and outermost layer is dry- laminated successively so as to be made into an adjacent layer or a laminated layer; as a result, a multilayered sheet for cold molding is obtained thereby. |
