| 摘要 |
<p><PICT:0763646/IV(a)/1> A process for the production of a continuous length of sheet material of polyvinyl chloride or copolymers of vinyl chloride and other monomers copolymerizable therewith, with a patent leather-like finish, comprises adhering at an elevated temperature to the normally exposed surface of the sheet material a smooth film of material dissimilar to the polymer or copolymer by passing the sheet material and dissimilar film between pressure rolls with the film in contact with the normally exposed surface of the sheet material whereby the surface of the sheet material is moulded against the film of dissimilar material. The dissimilar film is subsequently stripped off to reveal the patent leatherlike finish on the polyvinyl chloride sheet material. Specified dissimilar films are polyethylene terephthalate, polyvinyl alcohol, cellulose acetate and nitrate, ethyl cellulose and nylon. An engraved roll may be used to press the dissimilar film on to the polyvinyl chloride surface. The laminated assembly may be embossed before the dissimilar film is stripped off. As shown, polyvinyl chloride sheet material 1 is brought into contact with a polyethylene terephthalate film 2 by passing between two rolls 3 and 4 under slight pressure. Roll 3 is rubber-covered and unheated; roll 4 is of smooth metal heated to between 200 DEG to 300 DEG F. From the pressure rolls the laminated material passes over a guide roll 5, then partly round a cooling roll 6 and finally to a winding-up roll 7.</p> |
