Method of making a multilayer film

Details Method of making a multilayer film Method of making a multilayer film

1988-10-21

1989-12-05

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264171, 264211, 524424, B29C 3508, B29C 4700

Patent

active

048851191

ABSTRACT:
The present invention involves a method of making a multilayer film suitable for medical solution applications. Solution pH is controlled by the addition of a carbonate of an alkali metal to an ethylene ester or modified ethylene ester copolymer to form a blend, followed by the coextrusion of a core layer, first and second adhesive layers, and a sealant and outer layer to form a multilayer film having the blend in at least one of the adhesive layers. Alternatively, the blend may be present in the core layer.

REFERENCES:
patent: 3694403 (1972-09-01), Aishima et al.
patent: 3713965 (1973-01-01), Widiger et al.
patent: 4058663 (1977-11-01), Black
patent: 4629596 (1986-12-01), Coffman

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