| 摘要 |
1,198,000. Laminates. STADEXA.B. 9 Feb., 1968 [10 Feb., 1967], No. 6668/68. Heading B5N. [Also in Divisions B2 and D1] Laminates are produced by stacking layers, with possibly one or more other materials, of an adhesive coated material produced by solidifying the adhesive material by. cooling toja temperature at or below which it forms a solid brittle mass capable of being comminuted, comminuting the mass into particles by crushing at or below the said temperature, forming from the particles a fluidized bed maintained at or below said temperature, bringing a support surface into contact with the fluidized bed and causing the particles to adhere to the support surface. The particles are caused to adhere by heating the surface to a temperature substantially equal to the softening temperature of the adhesive material or by setting up a potential difference between the surface and the fluidized bed. The surface with the particles adhered thereto may be heated to a temperature substantially equal to the temperature of liquefaction of the adhesive material whereby the latter may spread over the surface to form a homogenous layer. The support may be a strip, plate, non-woven fabric, gauze, of cellulose triacetate, metal or paper; or cellular polymer foam of, for instance, rubber, polyvinyl chloride or polyurethane. When coated with adhesive on one side only, the other side may be coated with an anti-adhesive substance. The adhesive may consist of natural or synthetic rubber e.g., butadiene-styrene, polyisobutylene, or polyvinyl ether; hydrogenated rosin, rosin esters, polyterpenes, hydrogenated coumarone-indene, or polyvinyl pyrrolidone. The adhesive may contain a non-adhesive filler e.g. zinc oxide or clay; a thermoplastic e.g. a wax, polyvinyl acetate or a polyamide; a water-soluble adhesive e.g. bone glue or starch; or a water-soluble polymer e.g. polyvinyl alcohol or polyacrylic acid. The other materials may be corrugated cardboard and ply-wood.
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