| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminate film for packaging excellent in gas barrier properties and piercing strength with 7 μm or more and 13 μm or less thickness. <P>SOLUTION: On one side of a polyester film with 300 MPa or more breaking strength in the longitudinal direction, 260 MPa or more breaking strength in the width direction, 2.5% or less thermal shrinkage factor at 150°C and after 30 min in the longitudinal direction, and 1.7% or less thermal shrinkage factor at 150°C and after 30 min in the width direction, a metal thin film layer with 15-700 ng/cm<SP POS="POST">2</SP>deposited amount is arranged, and a layer formed of an inorganic compound with 10-100 nm thickness is thereafter laminated. Thereby, a gas barrier laminate film can be obtained which has 1.5 cc/(m<SP POS="POST">2</SP>×day) or less oxygen permeability, 1.5 g/(m<SP POS="POST">2</SP>×day) or less water vapor permeability, and 0.7 N/μm or more piercing strength per unit thickness of the film. <P>COPYRIGHT: (C)2013,JPO&INPIT |
