| 摘要 |
PURPOSE:To provide a stretched film made from a specific olefin polymer which is excellent in stretching stability and 'stretchable at a high speed. CONSTITUTION:The objective film is made from an olefin polymer contg. an alpha-olefin-in-polyene copolymer. The polymer is prepd. e. g. by copolymerizing a monomer component consisting of an a-olefin and a polyene compd. in the presence of a catalyst system consisting of a transition metal catalyst component and an organometallic compd. catalyst component contg. a metal of the group I, II, or III in an amt. of the monomer component of 0.01-2,000g based on 1g of the transition metal catalyst component to give a prepolymerized catalyst contg. the alpha-olefin-polyene copolymer and polymerizing or copolymerizing an olefin in the presence of the prepolymerized catalyst. |
