Sumitomo Electric Fine Polymer, Inc.

Katsuya Yamada

Kazuaki Ikeda

Akito Kubo

Kouji Mutou

Noriaki Takami

Yasunori Nagaoka

Provided are a resin-releasing jig including a base and a releasing layer formed on a surface side of the base, in which the releasing layer is composed of a resin containing a perfluorinated polymer as a main component, and the perfluorinated polymer is crosslinked; and the resin-releasing jig further including a primer layer disposed between the base and the releasing layer, in which the primer layer is composed of a resin containing, as a main component, a perfluorinated polymer and an engineering plastic, the perfluorinated polymer in the primer layer is crosslinked, and the releasing layer has high abrasion resistance and a good adhesive force to the base and thus the resin-releasing jig has good durability. In particular, provided is the resin-releasing jig which is an extrusion molding mold used in an extruder for producing a long resin molded article.

Resin-releasing jig

A manufacturing method is provided for a roller, by which a roller having low eccentricity and high surface smoothness can be obtained without the need to perform cumbersome processes such as polishing of a foamed layer. The manufacturing method for a roller includes the steps of injecting a foam-layer compound into the space between a core bar, which is disposed at the center of a cylindrical mold, and an electron beam-irradiated tube, which has an outer diameter somewhat smaller than an inside diameter of the cylindrical mold, and which is set inside the cylindrical mold, and heating and foaming the foam-layer compound, so that the outer surface of the electron beam-irradiated tube is pressed against the inner surface of the cylindrical mold.

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Sennan-gun, Japan

Katsuya Yamada