| 摘要 |
<p>An embossable sheet material comprises a base sheet 101 having a front surface 102 and a back surface 103, the base sheet being formed of a transparent rigid (defined as bendable but having a memory) synthetic organic resin having a structure and composition such that permanent cold flow deformation thereof to form embossments 141 thereon renders the resin opaque in the areas of deformation of the embossments 101 a, b, c, and a decorative two colour design 108 carried by the base sheet on the rear surface thereof, the sheet material being embossable to provide opaque embossments on a field of the decorative design when viewed through the front surface of the base sheet. The two colour design may be a wood grained design. The two colour design may comprise an open pattern 108 of a first colour carried by the base sheet on the rear surface thereof, and an opaque layer 110 of a second colour overlying the open pattern and visible through the openings in the pattern. A transparent primer coat 105 having a flatting agent uniformly distributed therethrough may be applied to the rear surface 103 of the base sheet 101 before the open pattern 108 of a first colour is applied to the rear surface 107 (of the primer coat). A transparent top coat 115 having a flatting agent uniformly distributed therethrough may be applied to the front surface 102 of the base sheet 101. The top coat may also include an ultraviolet screening agent and an antistatic agent. The front and rear surfaces of the base sheet may have a matt finish thereon, no top or primer coat being then required, and the pattern can be printed directly on the base sheet. The sheet may also include a layer 121 of pressure sensitive adhesive adhered to the rear surface of the opaque layer 110 and a detachable protective backing sheet 125 removable adhered to the rear surface of the adhesive layer. The base sheet may be formed from and unplasticized rigid polyvinyl chloride resin, a vinyl chloride-vinyl acetate copolymer, or a mixture of two different vinyl chloride polymers at least one of which is an emulsion polymer. The primer coat may be a copolymer of vinyl chloride and vinylidene chloride. The opaque coloured coating may contain "Elvax" (Trade mark), colouring agents and clear nitro cellulose base. The top coat may contain methyl methacrylate resin. The coatings may be applied by roller and reverse roller means.</p> |
