| 摘要 |
PURPOSE:To enhance safety against damage of a vessel by constituting a nonfoaming film layer of polyolefin so as to contain specific wt.% olefin polymer and inorganic filler. CONSTITUTION:A single or a copolymer of olefin polymers such as ethylene and propylene is used as a nonfoaming film constituting a film layer. Propylene series polymer is preferable to provide heat resistance. A propylene-ethylene- butane copolymer is preferable as a propylene-ethylene copolymer or a matter displaying more softness. Talc or calcium carbonate is suitable for an inorganic filler to be contained in olefin series polymer. It is preferable that a filling quantity of the inorganic filler is 5-40wt.% per 60-95wt.% olefin series polymer, at least 40% or more in a uniaxial direction of a nonfoaming film and-10-10% in the direction meeting at right angles with an axial direction. Consequently, safety at the time of handling of a bottle can be enhanced. |
