| 摘要 |
978,844. Laminates and laminating. HICKS & OTIS PRINTS Inc. July 5, 1963 [Dec. 24, 1962], No. 26709/63. Heading B5N. [Also in Division B6] A laminate having a contoured surface is made by impregnating a foamed material 210 with an adhesive applied in spaced areas 220 by means of rollers 215, 216, partially curing the adhesive by heater 229, applying stretchable surface layers 235, 236 by rollers 233, 234 which also compress the foam layer so that when the laminate leaves the rollers the adhesive areas remain compressed, but the other areas return to their original thickness. The foamed material must have an open cell structure and may be a natural or synthetic rubber, e.g. butadiene-styrene and butadiene-acrylonitrile copolymers, polyvinylidene, isoprene polymers and copolymers, or plastics materials such as polymers and copolymers of vinyl chloride and vinyl acetate or polyether and polyester polyurethanes. The stretchable surface layer may be a woven or knitted fabric or may be a thermoplastic, e.g. polyethylene, polypropylene or polymers and copolymers of vinyl chloride, the thermoplastic layer being softened when it is applied. Suitable adhesives are natural and synthetic rubber cements, cellulose cements, pressure-sensitive adhesives and thermosetting resins such as epoxy resins. The examples describe particular adhesive compounds. |
