| 摘要 |
PURPOSE:To cause the transparency and moisture permeation resistance of the obtained PTP package article to be excellent together by a method in which polypropylene and petrol resin are compounded at specified weight ratio and made into a resin composition, pelletizing it by an extruding machine, and then it is extruded by T die method, etc. CONSTITUTION:The resin composition composed of 80-97pts.wt. polypropylene and petrol resin, for instance 3-20pts.wt. resin of aliphatic family carbon bydride, is extrusion-formed. As polypropylene, the random copolymer made of homopolypropylene, propylene and alpha-olefine, e.g. ethylene, butene-1, etc. may be used. The obtained sheet is excellent in moisture permeation resistance and in thermoformability at PTP package, and it is practically used, being put into the forming machine for PTP package. |
