Sumitomo Chemical Company, Limited

Okura Industrial Co., Ltd.

Teruaki Yoshida

Tadatoshi Ogawa

Shuji Kitamura

Hajime Sadatoshi

Kiyohiko Nakae

Kazuo Kondo

Teruo Tada

Nobuya Ishiguro

Toyoki Wano

Masahiro Kakugo

Kozo Kotani

Toshio Kawakita

Takeshi Yamada

Seiichiro Ima

Takanori Kume

Haruo Hayashida

Akihiro Ichige

Yufu Sato

A laminate film for wrapping which comprises a layer comprising (A) an ethylene-.alpha.-olefin copolymer having a coefficient of variation of composition distribution (Cx) represented by equation shown below of 0.40 or less and having an ethylene content of 50 mol % or more and at least one layer of a different kind;

Laminate film for wrapping

A tubular multilayer film including at least two, biaxially stretched tubular layers each formed of a polypropylene resin, wherein the innermost layer contains spherical antiblocking agent particles having an average particle size of 0.2 to 5 .mu.m in an amount of 0.1 to 0.7% by weight, and the outermost layer is free of the spherical antiblocking agent particles is disclosed. The multilayer film may be prepared by biaxially stretching a multilayer tubular raw sheet having an innermost polypropylene layer containing spherical antiblocking agent particles and an outermost polypropylene layer free of such antiblocking agent particles.

Biaxially stretched multilayer film and process for manufacturing same

A heat-shrinkable polypropylene film adapted to be printed with, particularly, a flexographic ink is disclosed, which comprises a single layer heat-shrinkable film of a polypropylene resin composition containing spherical silicone resin fine particles of 0.2 to 5 microns in average particle size in a content of 0.1 to 0.7% by weight or a multi-layer heat-shrinkable film wherein at least one of the surface layers is such a polypropylene resin composition, with at least one surface of the single layer film or one surface of the surface layer of the multi-layer film having been subjected to corona discharge treatment to such degree that wettability index of the treated surface becomes 36 to 42 dyn/cm.

Heat-shrinkable polypropylene film with improved printability

A multi-layer shrink film obtained by forming an assembly which comprises an interlayer comprising a flexible propylene resin having a Vicat softening point of 115.degree. C. or less and/or a linear very low-density polyethylene having a density less than 0.91 g/cm.sup.3 sandwiched between outermost layers comprising a propylene resin having a Vicat softening point higher than that of the flexible propylene resin of interlayer and within the range of 80.degree.-150.degree. C. followed by stretching said assembly is disclosed. The film obtained according to the present invention is well suited for a multi-layer shring packaging film and the like.

Multi-layer shrink film

A polypropylene multi-layer film which comprises a crystalline polypropylene substrate layer having laminated to at least one side thereof a sheet of a resin composition comprising:

Polypropylene multi-layer film

A packaging transparent propylene copolymer film stretched in at least one direction, which consists of a copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene. The copolymer satisfies the following conditions;

Packaging propylene copolymer film

A laminated polypropylene film consisting of a crystalline polypropylene layer having laminated to at least one side thereof a copolymer layer, said copolymer being a random copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a random copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene obtained by vapor phase polymerization in the substantial absence of a liquid medium and satisfying the following conditions (1) to (4):

Laminated polypropylene film

A packaging shrink film consisting essentially of a random copolymer of propylene and an .alpha.-olefin having 4 or more carbon atoms or a random copolymer of propylene, an .alpha.-olefin having 4 or more carbon atoms and ethylene, said random copolymer satisfying the following conditions:

Growing community of inventors

Ichihara, Japan

Teruaki Yoshida