Apparatus and method for producing multi-layered laminates...

Details Apparatus and method for producing multi-layered laminates... Apparatus and method for producing multi-layered laminates...

B - Operations, Transporting

29

C

18/514, 18/756

B29C 49/22 (2006.01) B29B 17/00 (2006.01) B29C 47/06 (2006.01) B32B 27/00 (2006.01) B32B 27/08 (2006.01)

Patent

CA 1258758

APPARATUS AND METHOD FOR PRODUCING MULTILAYERED LAMINATES AND IMPROVED MULTILAYER LAMINATES PRODUCED THEREFROM ABSTRACT OF THE DISCLOSURE A multi-layer laminate structure comprises a separate layer of scrap produced from the several thermoplastic resins used in making the laminate structure. In a preferred construc- tion, the multi-layer laminate structure comprises an outer thermoplastic polyolefin layer, an inner thermoplastic poly- olefin layer and an intermediate oxygen barrier layer preferably made of ethylene-vinyl alcohol copolymer. An adhesive layer bonds the barrier layer to the inner polyolefin layer and a sepa- rate scrap layer is disposed interiorly of the outer polyolefin layer. A second adhesive layer bonds the scrap layer to the intermediate barrier layer. Containers having excellent oxygen barrier properties and good transparency are made by forming a parison from the multilayer laminate structure and blow molding the parison to the desired container shape. Apparatus are described for producing multi-layered par- isons of polymeric materials for producing such structures in which the relatively thin layers of the structure are formed into a laminate within the apparatus before being joined to a relatively thick layer.

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