| 摘要 |
<p>1518302 Laminates INTERNATIONAL PAPER CO 1 Aug 1975 [6 Aug 1974] 32226/75 Headings B5N and B5P A laminate comprises a layer 12 of paper board base stock a first layer 11 of a thermoplastic material having a thickness greater than 0À0005 ins. bonded to the stock, a polymer film layer 14 of a thickness of from 0À0003 to 0À0015 ins. bonded to the stock, the film having a tensile strength greater than 4,000 p.s.i. at the yield point and an elongation at fracture greater than 200% and a second layer 15 of thermoplastic material having a thickness greater than 0À0005 ins. bonded to the film which is optionally bonded to the stock by an inner layer 13 of a thermoplastic material. An aluminium foil may be bonded between the film and the second layer, being bonded to the film by a second inner layer. The first and second layers may be of polyethylene, polypropylene, an ethylene acrylic acid copolymer or anionomer, the film of nylon, polytetramethylene terephthalate or polycyclohexylene dimethylene terephthalate and the inner layers of polyethylene.</p> |
