| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a thermally bonding laminated film which is excellent in mechanical strength including piercing strength, abrasion resistance, and pinhole resistance and optical characteristics including transparency. SOLUTION: The thermally bonding laminated film has a heat fusion layer (I) made of an ethylenic polymer film obtained by biaxially stretching an ethylenic polymer (A) having a density of 910-938 Kg/m<SP>3</SP>, a fusion heating value (ΔH<SB>T</SB>) obtained by a differential scanning calorimeter (DSC) of 100-140 J/g, a fusion heating value (ΔH<SB>L</SB>) in a range of fusion start temperature-110°C of 50-80 J/g, a fusion heating value (ΔH<SB>H</SB>) in a range of 110°C-fusion end temperature of 35-80 J/g, and a ratio (ΔH<SB>H</SB>)/(ΔH<SB>L</SB>) of 0.5-1.5 and a substrate layer (II) made of a thermoplastic resin selected from polyamides etc. COPYRIGHT: (C)2009,JPO&INPIT
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