| 摘要 |
<p>1535982 Laminates KONINKLIJKE EMBALLAGE INDUSTRIE VAN LEER BV 2 Aug 1977 [4 Aug 1976] 32559/76 Heading B5N A method of making a laminate comprises bringing into intimate contact at least one thermoplastic polymeric foil and at least one similar or dissimilar foil, the foils not having been subjected to surface pretreatment, at a temperature of from room temperature to just below the softening or melting point of the foil having the lower (lowest) softening or melting temperature to form a low peel strength composite which is then subjected while substantially free of tension and pressure to annealing at an elevated temperature below the lower (lowest) softening or melting temperature. The polymeric foil, which may be monoaxially oriented, may be formed of a homo- or copolymer of ethylene, e.g. an ethylene-vinyl acetate copolymer, polypropylene, polystyrene polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol or nylon.</p> |
