Mitsubishi Gas Chemical Company, Inc.

Mgc Filsheet Co., Ltd.

Masahide Takeda

Shotaro Ohno

Takeshi Onishi

Osamu Kakinoki

Masataka Sugiyama

Kentaro Suzuki

Satoshi Kaneko

Shohei Takahagi

Keiichi Zouta

Junya Asano

The present invention realizes a card-use resin composition that exhibits beautiful colors and that has high laser-marking coloring properties, a card-use resin sheet formed with the card-use resin composition, and a card. The above problem has been solved by a card-use resin composition containing a laser coloring agent and a thermoplastic resin, wherein the thermoplastic resin contains a polycarbonate resin, and the laser coloring agent contains at least one type of black pigment, the primary particle diameter of the black pigment being 40 to 80 nm, and the amount of the black pigment with respect to the entire mass of the card-use resin composition being 20 to 40 mass ppm.

Card-use resin composition having laser-marking coloring properties and card made therewith

Provided is a polymer film which can eliminate both moire and glitter and is suitable for use as a diffusion film. The above-mentioned problems are solved with a polymer film, a surface of which has an arithmetic average roughness Ra of 0.63-1.80 &#x3bc;m, a root mean square roughness Rq of 0.76-2.40 &#x3bc;m, and an average height Rc of roughness-curve elements of 2.45-7.20 &#x3bc;m.

Polymer film, and light diffusion film comprising same for display

A shaping roll for melt extrusion molding used for melt extrusion molding of thermoplastic resin, the shaping roll for melt extrusion molding comprises a metal roll body, a first cylinder, and a second cylinder. The metal roll body has a heat medium passage internally. The first cylinder covers a surface of a middle portion of the roll body part. The second cylinder covers surfaces of both end portions of the roll body part. The first cylinder comprises a first metal material having a thermal conductivity of 40 W/m&#xb7;K or more. The second cylinder comprises a second metal material having a thermal conductivity of 20 W/m&#xb7;K or less. The first cylinder and the second cylinder are at least partially joined to each other.

Shaping roll for melt extrusion molding, shaping roll assembly for melt extrusion molding, and melt extrusion molding method

An optical sheet is formed by laminating, by co-extrusion molding, a first layer containing a polycarbonate resin, a second layer containing a polyamide resin, and a third layer, wherein the second layer is laminated between the first layer and the third layer, the first layer and second layer, and the second layer and third layer can each be peeled at the interface, and the outer surface of the first layer has a fine grooved structure. The optical sheet, which is provided with a plurality of layers in such a way, is capable of retaining, a sufficient amount of heat in a laminate in a mold since the entire sheet can be made thick during melt extrusion molding, and is able to improve the transferability of the fine grooved structure. In addition, the optical sheet can be made thinner by using only the peeled first layer as an optical sheet.

Optical sheet and method for manufacturing same

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Tokyo, Japan

Masahide Takeda