Soft coat film
AssigneeDai Nippon Insatsu Kabushiki Kaisha
InventorsKiyoshi Oguchi, Yozo Kosaka
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Abstract
The present invention relates to a composition for soft coat films having a soft tactile impression, which is characterized by containing as essential components (a) an urethane acrylate having a molecular weight of 500-50,000 and (b) a tactile improver, and to a method for producing soft coat films using such a composition. The soft coat film obtained by the present invention has a soft surface tactile impression just like buckskin and excels in such surface properties as wear resistance, impact resistance and scuffing resistance.
Claims17
A method for producing soft coat films having a soft tactile impression, comprising the steps of:
- forming a composition layer between a support film and a laminating film, said laminating film having fine irregularities on a surface thereof which contacts said composition layer, said surface having a surface roughness in the range of 0.2-100 .mu.m as expressed in terms of a center-line average roughness Ra, said composition layer comprising a composition for soft coat films containing as essential components (a) a urethane acrylate having a molecular weight of 500-50,000 and (b) a tactile improver selected from the group consisting of silicone resins, waxes and fluorocarbon resin surfactants;
- irradiating the thus obtained support film/composition layer/laminating film laminate with (i) a first dose of ionizing radiation from the support film side of the laminate and then (ii) a second dose of ionizing radiation from at least one of the laminating film side and the support film side of the laminate, to promote migration of said tactile improver into a surface region of the composition layer proximate the laminating film side of the laminate, whereby the ionizing radiation sets the composition in said laminate;
- and
- releasing only said laminating film from said laminate to obtain soft coat films having a soft tactile impression.
A method for producing soft coat films having a soft tactile impression, comprising the steps of:
- forming a composition layer on a support film, said composition layer comprising a composition for soft coat films containing as essential components (a) a urethane acrylate having a molecular weight of 500-50,000 and (b) a tactile improver selected from the group consisting of silicone resins, waxes and fluorocarbon resin surfactants;
- applying pressure to the thus formed laminate from said composition layer side with a forming roll having fine irregularities on its surface and a surface roughness in the range of 0.2-100 .mu.m as expressed in terms of a center-line average roughness Ra;
- and
- irradiating the laminate with (i) a first dose of ionizing radiation from the support film side of the laminate and then (ii) a second dose of ionizing radiation from at least one of the laminating film side and the support film side of the laminate, to promote migration of said tactile improver into a surface region of the composition layer proximate the laminating film side of the laminate, whereby the ionizing radiation sets the composition in said laminate to obtain the soft coat films having a soft tactile impression.
Dependencies are inferred from the claim text.