| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated polypropylene film having an excellent property to be cut linearly which could not be attained by a conventional technique and being excellent in hand-cutting properties and mechanical properties. SOLUTION: In the laminated polypropylene film comprising at least three layers, an intermediate layer (B) of a polypropylene resin is laminated on at least one side of a base layer (A) made of a biaxially oriented polypropylene resin, and at least one uniaxially oriented layer (C) 18-40μm in thickness made of a uniaxially oriented polypropylene resin is laminated on the intermediate layer (B). The tear propagation resistance T<SB>MD</SB>of the film in the direction perpendicular to the orientation direction of the uniaxially oriented layer (C) is at least 60 g. The difference T<SB>MD-TD</SB>between the tear propagation resistance T<SB>TD</SB>in the orientation direction of the uniaxially oriented layer (C) and the above T<SB>MD</SB>(=T<SB>MD</SB>-T<SB>TD</SB>) is at least 40 g. The laminated film has moderate mechanical properties and the excellent property to be cut linearly. COPYRIGHT: (C)2006,JPO&NCIPI
|
