| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretch-shrink laminated polyolefin film useful as a film for stretching package and shrinking package which is used in the prepackage of retail goods, mainly food. SOLUTION: In the lamination structure of an outermost layer/a core layer/an innermost layer, the core layer is made from a blend of 30-80 pts.wt. of crystalline polypropylene and 20-70 pts.wt. of syndiotactic polypropylene, and the innermost and the outermost layers are made from a blend of 10-60 pts.wt. of ethylene-α-olefin copolymer of 0.870-0.900g/cm<3> density and 40-90 pts.wt. of polyethylene composition of 0.900-0.940g/cm<3> density (higher than the density of the ethylene-α-olefin copolymer). At least into two layers is incorporated 0.1-4.0 pts.wt. of a nonionic surfactant composition. The laminated film is stretched to obtain a stretch-shrink film having good properties such as transparency, gloss, handling in an automatic packaging machine, heat sealing, and stretching. |
