Patent ID: 7927452
Filing Date: 2011-04-19
Classification: B29C,B32B,C08G,C08J,H01L,Y10T

Abstract:
1. A process for producing a layered sheet, comprising: preparing a cell dispersed urethane composition by a mechanical foaming method; applying the cell dispersed urethane composition onto a base material sheet having a thickness of 0.05 to 0.2 mm and a nitrogen gas permeation rate of 1×10 laminating a release sheet having a thickness of 0.05 to 0.2 mm and a nitrogen gas permeation rate of 1×10 forming a polyurethane foamed layer having interconnected cells by curing the cell dispersed urethane composition while making the thickness thereof uniform by applying pressure, wherein nitrogen gas, oxygen gas, carbon dioxide, a rare gas, air, or a mixed gas thereof is held within the layered sheet.