| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging film excelling in transverse cutting property. <P>SOLUTION: The packaging film comprising a thermoplastic resin composition fulfills the following (1)-(3): (1) a cut deviation amount (δ) in a film cutting test is 10 mm or less, (2) the ratio P/Q of film end tensile elongation (P) in a length direction to film end tensile elongation (Q) in a lateral direction is 0.6 or less, and (3) the film wall thickness is 3-30 μm. The cut deviation amount (δ) is a maximum value (mm) of a deviation between a cutting line when cutting a film by forming a slit with a length of 3 mm in the center part of one side α of a test piece formed of a rectangular film having sides α (with a length of 300 mm) and sides β (with a length of 220 mm), the sides α being parallel with the length direction of the film, and pulling both corners on the slit side α side by human hands, and a reference line vertically lowered to the other side α from the slit; and the ratio P/Q is the ratio of elongation (P) when the test piece is broken by pulling, at a tensile speed of 200 mm/min, one of sides A of a test piece formed of a rectangular film having the sides A (with a length 60 mm) and sides B (with a length of 20 mm), with the sides A being parallel with the length direction of the film, to elongation (Q) when the test piece is broken by carrying out a tension test in the same way as the (P) excluding the sides A of the test piece being parallel with the lateral direction of the film. <P>COPYRIGHT: (C)2012,JPO&INPIT |
