| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated film reduced in strain after boil treatment, enabling a packaging bag to withstand air-containing boil treatment and low in the boil puncture ratio being the bag bursting ratio due to boil puncture in the air-containing boil treatment. SOLUTION: Both of the stress in the longitudinal direction of the laminated film, which is composed of at least a polypropylene non-stretched film and a biaxially stretched polyamide film, when the laminated film is longitudinally stretched by 75% in hot water of 90°C and the stress in the lateral direction of the laminated film when the laminated film is laterally stretched by 75% are 2.8×10<SP>7</SP>Pa or above. The seal strength of the polypropylene non-stretched film is 13.0 N/15 mm or above. COPYRIGHT: (C)2007,JPO&INPIT
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