Stock material or miscellaneous articles – Composite – Of polyamide
Patent
1989-11-30
1991-09-17
Buffalow, Edith
Stock material or miscellaneous articles
Composite
Of polyamide
428516, 428520, 428522, 4289033, B32B 2708
Patent
active
050494490
ABSTRACT:
A laminate, a method for making the laminate and articles formed from the laminate are disclosed. The laminate comprises an outer layer, an optional adhesive layer, an inner layer, an intermediate regrind layer formed of a blend of the materials from which the other layers are formed, and, interposed between the outer layer and the intermediate regrind layer, there is a buffer layer which is formed from a blend of the materials from which the outer layer and the intermediate regrind layer are formed and which comprises at least about 5% of the material of the intermediate regrind layer. The outer layer is preferably polypropylene and the inner layer is preferably an ethylene vinyl alcohol copolymer.
REFERENCES:
patent: 4605576 (1986-08-01), Jabarin
patent: 4629596 (1986-12-01), Coffman
patent: 4705708 (1987-11-01), Briggs et al.
patent: 4781954 (1988-11-01), Krishnakumar et al.
Chang Dae Han, "Multiphase Flow in Polymer Processing", published in 1981 by Academic Press, pp. 341-449.
Ed Galli, "Coextrusion: New Layers of Technology", published Jan. 1988 by PM&E, pp. 36-38.
Dragan Djordjevic, "Coextrusion with Barrier Scrap--Problems and Solutions", presented at the Soc. of Plastics Eng. Reg. Conf.
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