Toyo Seikan Group Holdings, Ltd.

Toyo Seikan Co., Ltd.

Takafumi Ohsawa

Yoshihiro Ohta

Takuya Hara

Satoshi Kawamura

Hiroki Komagata

Jiro Tomita

This invention provides an easy-to-tear resin film. Such easy-to-tear resin film is an easy-to-tear, unstretched resin film composed of a blend of a polyethylene terephthalate-based resin with the second resin having a difference in SP value from the polyethylene terephthalate-based resin of 1.1 to 4.0 (cal/cm). This invention also provides a laminate filmB for a packaging material comprising the easy-to-tear, unstretched resin filmbetween the inner layer filmserving as a heat seal surface and the surface layer filmcomprising an isophthalic acid-modified polyethylene terephthalate resin having a copolymerization ratio of isophthalic acid component of 0 mol % to 5 mol %.

Easy-to-tear, unstretched resin film and laminate film for packaging material using the same

Provided is an oxygen-absorbing packaging material which is used for adhesive patches or the like containing an easily oxidizable component and an oily component, and which has improved tearability, while maintaining good heat seal strength. The present invention relates to an easily tearable oxygen-absorbing packaging material which has a multilayer structure comprising an oxygen barrier layer, an oxygen absorption layer and a sealant film, and wherein: the sealant film is a multilayer resin film that comprises at least a core layer and an inner layer having heat sealability; and the core layer contains 20-40% by mass of a cyclic polyolefin resin and/or an acrylic resin and 60-80% by mass of a polyethylene terephthalate resin relative to the total mass of the core layer.

Oxygen-absorbing packaging material

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Kanagawa, Japan

Takafumi Ohsawa