| 摘要 |
PURPOSE: To apply a polyolefin stretch film to the use as a trayed overlap material by adding a first outer layer and a second outer layer having a specific wt.% polymer unit derived from ethylene as a kind of copolymer and also a specific density and a specific melt point and adding a core layer having a specific % or less unrestricted shrinkage factor at a specific temperature in one direction. CONSTITUTION: This polyolefin multilayer soft film consists of at least a first outer layer, a second outer layer and a core layer sandwiched between the former two. Further, the film is preferably a slot cast film or an inflated film with at least three layers including two outer layer and a core layer arranged in between. In addition, the film has less than 10% unrestricted shrinkage factor at 90 deg.C in one direction. The first outer layer contains a kind of copolymer of ethylene and a kind of C3-C8α-olefin and the copolymer contains at least 75 wt.% polymer unit derived from the ethylene. In addition, the copolymer has about 0.900 g/cm<3> -0.915 g/cm<3> or less density and at least 90 deg.C melt point. |
