| 摘要 |
PURPOSE:A heat-shrinking foamed sheet having good heat shrinkability and being capable of adhering to both of the body and the neck of a bottle, comprising a polyolefin resin closed cell foam and having a specified thickness, a specified degree of stretching, and a specified cell size. CONSTITUTION:A sheet comprising a polyolefin resin closed cell foam of an expansion ratio of 2-100; having a thickness of 10mu-10mm., stretched and orientated at a longitudinal stretch ratio of 1-8 and a lateral stretch ratio of 2-15; satisfying the relationship of dl>dw>dt (wherein dl is the largest diameter of a cell, dw is the largest width of a cell, and dt is the largest thickness of a cell and the relationship of anti dl/anti dt=3-100 (wherein anti dl is an average of dl and anti dt is an average of dt) and an average dl of 0.001-2mm.. Preferably, the polyolefin resin contains 20-1,000ppm slip agent. This agent improves slip of the sheet during production and slip between an object to be packaged and the sheet during heat shrinking and can bring good results in effecting shrinkage packaging without wrinkling or breaking. |
