Oji Yuka Goseishi Co., Ltd.

Mitsubishi Petrochemical Company Limited

Yozo Ohba

Masaaki Yamanaka

Takashi Toyoda

Tetsuji Kakizaki

Akira Iwai

Fukashi Hashimoto

Akira Akimoto

Tokumi Chiba

Moriyasu Sudo

Pencil writable and printable synthetic paper comprising a finely porous polyolefin film layer having an opacity of at least 80% obtained by stretching a polyolefin film containing from 8 to 65% by weight of an inorganic fine powder having on one or both sides thereof a stretched ethylene-vinyl alcohol copolymer film layer, at least one of the stretched ethylene-vinyl alcohol copolymer film layers having a coat layer thereon. When printed, the stretched ethylene-vinyl alcohol copolymer film layer prevents hydrocarbon solvents present in printing inks from penetrating into the polyolefin film layer to eliminate local surface unevenness and curling.

Synthetic paper for writing and printing

A process for producing synthetic label paper which comprises preparing a multi-layer film comprising a film of a thermoplastic resin containing an inorganic fine powder having provided on the back side thereof a layer of a heat-sealable resin having a melting point lower than that of said thermoplastic resin, embossing the heat-sealable resin layer, and stretching the embossed multi-layer film at a temperature of from the melting point of said heat-sealable resin to a temperature lower than the melting point of said thermoplastic resin. The label paper, when used for in-mold decorating of a container, gives a blister-free appearance to a container, causes no deformation of a container, and exhibits sufficient nerve for fitting to an inner wall of a mold.

Process for producing synthetic label paper

A stretched film having excellent printing and writing properties and mechanical strength is produced by stretching a film molded from a styrene-grafted polyolefin resin in at least one direction. The styrene-grafted polyolefin resin is produced by heating an aqueous suspension containing 100 parts by weight of polyolefin resin particles, from 10 to 400 parts by weight of a styrene monomer, and a free radical polymerization initiator in an amount of from 0.01 to 1 part by weight per 100 parts by weight of the styrene monomer.

Stretched film

A synthetic paper prepared by stretching a sheet of a composition comprising a thermoplastic resin mainly composed of an olefin-based resin and an adduct of melamine and isocyanuric acid or cyanuric acid to a size of 1.3 times or more the original size of the sheet at a temperature lower than the melting temperature of the olefin-based resin; such synthetic paper has good luster and sliding properties.

Growing community of inventors

Ibaraki, Japan

Yozo Ohba