Toppan Printing Co., Ltd.

Toppan Inc.

Junpei Hayashi

Ryukichi Matsuo

Tomokazu Murase

Shigekazu Yasutake

Yuki Hayashi

Takayuki Tani

Kenta Osawa

A gas barrier film includes a substrate containing polypropylene as a main component, a gas barrier layer on a first surface of the substrate, and a coating layer on the gas barrier layer. Infrared spectroscopy of the first surface indicates a peak intensity (I) at 1360 to 1390 cmand a peak intensity (I) at 1440 to 1480 cmin a ratio satisfying the formula: (I)/I()≤1.65.

Gas barrier film

The present disclosure relates to a laminate film for packaging. A laminate film according to an aspect of the present disclosure includes: a resin substrate having a heat sealing surface that constitutes one outermost surface of the laminate film; a coating layer made of a non-metallic material; and an underlayer disposed between the resin substrate and the coating layer. The resin substrate includes a first layer that is made of olefin copolymer and constitutes the heat sealing surface, and a second layer made of polypropylene, and the first and second layers are laminated and biaxially stretched.

Laminate film and packaging bag

A laminated film including a resin substrate, and a coating layer on the resin substrate. The coating layer contains a water-soluble polymer, at least one of a silane coupling agent and a hydrolysate thereof, at least one of a metal alkoxide and a hydrolysate thereof, and an inorganic layered compound.

Laminated film and packaging bag

Growing community of inventors

Tokyo, Japan

Junpei Hayashi