Dai Nippon Insatsu Kabushiki Kaisha

Mutsuo Shima

Takashi Matano

Ichiro Kawahata

Michiro Naka

Hideki Kato

Kensuke Aoyama

A process for producing decorative sheets having an embossed pattern corresponding to a printed pattern layer, the process including the steps of: (a) forming a printed pattern layer on a base paper of the decorative sheet by use of a printing ink containing (i) a curing agent or a polymerization catalyst and (ii) a curable rein, the curing or catalytic action of the curing agent and polymerization catalyst being blocked and thereby inactivated, the printing ink being liquid repellant; (b) releasing the blocked state of the curing agent or polymerization catalyst thereby curing the curable resin in the printed pattern layer; (c) coating the whole surface of the printed pattern layer with a coating agent for formation of a top coating layer; and (d) solidifying the coating agent thereby forming the top coating layer of which the portions corresponding to the liquid repellant printed pattern layer are concaved.

Process for producing decorative sheets having embossed pattern

By the use of improved decorative sheets each comprising (a) a hydrophilic deformative sheet which is susceptible to expansion deformation by swelling caused by water absorption and (b) a moisture penetration controlling layer formed on the entire surface of at least one side of the hydrophilic deformative sheet, each decorative sheet being designed to differ, depending upon regions of the sheet, in the degree of expansion deformation caused by water absorption, decorative articles each having a deep and clear surface unevenness or relief pattern can be obtained on hardened water-containing plastic materials. These decorative articles are applicable to various uses such as architectural materials (interior and exterior materials for walls, ceilings, etc.), decoration boards and panels, materials for sign boards and materials for packaging.

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Sayama, Japan

Mutsuo Shima