| 摘要 |
PURPOSE:To impart truely an embossing pattern and to make good draping of an embossing sheet without damages, by preheating a sheet which is being embossed in the surface while being transferred along particular periphery of a roll circumference in accompany with the roll, then by embossing under pressure with an emboss roll. CONSTITUTION:A sheet S which is embossed in the surface is supplied through a guide roll 3 in such a manner that the surface of polymer contacts the surface of a heating emboss roll 1. Then it is preheated between the point A and point B of an emboss roll which is equivalent to the quarter of the circumference, thereafter the sheet is embossed under pressure at the point B. As the embossing on the surface of a polymer is preheated at the surface of the emboss roll, the unevenness of preheating of sheet surface hardly occurs. True embossing pattern can be imparted at relatively low pressure and low temperature, and as the sheet material is not exposed to eccessive temperature, hardening of the draping of embossing sheet is prevented. Natural peeling is possible and there are not any deformation of embossing pattern, occurrence of surface roughness or peeling transverse flow; consequently, embossing sheet having good embossed surface is obtained. |
