Method for producing foamed body having chemical embossed patterns and resultant product

Claim 1

A method for producing a foamed body having chemically embossed patterns which comprises: forming a composition containing a plasticized polyvinyl chloride resin, a synthetic rubber material capable of forming sulphur bridges, a blowing agent selected from the group consisting of dinitrosopentamethylene tetramine and azobisdicarbonimide, sulphur as the vulcanization agent and a curing asistant into a sheet; printing an ink containing a vulcanization accelerator selected from the group consisting of 2-mercaptobenzothiazole, the zinc salt of 2-mercaptobenzothiazole, the sodium salt of 2-mercaptobenzothiazole, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, piperidine pentamethylene dithiocarbamate, zinc diethyl dithiocarbamate and zinc-dibutylxanthate onto said sheet in a desired configuration; drying and curing the printed sheet by heating said printed sheet to a temperature of 90°-100° C for at least 20 hours; and heating said dried sheet to a temperature of 180°-210° C to cause foaming of said sheet thereby generating a sheet having said chemically embossed patterns therein.

Claim 2

A method for producing a foamed body having chemically embossed patterns which comprises: forming a composition containing a plasticized polyvinyl chloride resin, a synthetic rubber material capable of forming sulphur bridges, a blowing agent selected from the group consisting of dinitrosopentamethylene tetramine and azobisdicarbonimide, sulphur as the vulcanization agent and a curing asistant into a sheet; printing an ink containing a vulcanization accelerator selected from the group consisting of 2-mercaptobenzothiazole, the zinc salt of 2-mercaptobenzothiazole, the sodium salt of 2-mercaptobenzothiazole, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, piperidine pentamethylene dithiocarbamate, zinc diethyl dithiocarbamate and zinc-dibutylxanthate onto said sheet in a desired configuration; drying and curing the printed sheet by heating said printed sheet to a temperature of 90°-100° C for at least 20 hours; and heating said dried sheet to a temperature of 180°-210° C to cause foaming of said sheet thereby generating a sheet having said chemically embossed patterns therein.

Claim 5

A method for producing a foamed body having chemically embossed patterns which comprises: forming a composition containing a plasticized vinyl chloride resin, a synthetic rubber material containing terminal groups capable of reacting with isocyanate functional groups, and a blowing agent selected from the group consisting of dinitroso pentamethylene tetramine and azobisdicarbonimide into a sheet; printing said sheet with an ink containing an isocyanate capable of reacting with said synthetic rubber into a desired configuration; drying said printed sheet at a temperature of 90°-100° C; and heating said dried sheet to a temperature of 180°-210° C to cause foaming of said sheet thereby generating a sheet having said chemically embossed patterns therein.

Claim 6

A method for producing a foamed body having chemically embossed patterns which comprises: forming a composition containing a plasticized vinyl chloride resin, a synthetic rubber material containing terminal groups capable of reacting with isocyanate functional groups, and a blowing agent selected from the group consisting of dinitroso pentamethylene tetramine and azobisdicarbonimide into a sheet; printing said sheet with an ink containing an isocyanate capable of reacting with said synthetic rubber into a desired configuration; drying said printed sheet at a temperature of 90°-100° C; and heating said dried sheet to a temperature of 180°-210° C to cause foaming of said sheet thereby generating a sheet having said chemically embossed patterns therein.