Kohjin Co., Ltd.

Aica Kogyo Company, Limited

Hiroshi Otsu

Takashi Kamiya

Yoshikazu Kubota

Masayasu Kamijo

A granitic stone-like artificial solid material is produced by impregnating a paper sheet having a granitic stone-like fleck pattern with a thermosetting resin to give a paper containing from 25-60% by weight of the resin on a dry basis. The resin impregnated paper sheet is dried and hot-pressed into a laminate comprising a plurality of the sheets. The paper includes (A) from 20-80% by weight of cellulose pulp, (B) from 2-40% by weight of an artificial fiber, (C) from 10-70% by weight of an inorganic filler less than 10 .mu.m in average diameter, and (D) from 1-30% by weight of a fine-grained additive of grains from 10-500 82 m in average diameter, having a color hue different from that of the inorganic filler (C).

Artificial granite solid material

A granitic stone ( so-called Mikage-ishi)-like artificial solid material produced by impregnating a paper sheet having a granitic pattern with a thermosetting resin to give a paper containing from 25 to 60% by weight of the resin at the dry basis; drying the resin-impregnated paper sheet; and hot-pressing a laminate comprising a plurality of the dried sheets; is claimed, said paper mainly comprising (A) from 20 to 80% by weight of cellulose pulp, (B) from 2 to 40% by weight of an artificial fiber, (C) from 10 to 70% by weight of an inorganic filler less than 10 .mu.m in average diameter, and (D) from 1 to 30% by weight of a fine-grained additive consisting of grains from 10 to 500 .mu.m in average diameter, having a color hue different from that of the inorganic filler (C). The artificial granite solid material has an excellent machinability, workability, and physical properties (strength), as well as good-looking textures (inorganic material like appearance, expressing by itself heaviness, hardness, and thickness; exhibits a very granitic look as a whole) with an ornamental and luxurious appearance.

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Aichi, Japan

Hiroshi Otsu