Entrapped liquid treatment of laminated film

Details Entrapped liquid treatment of laminated film Entrapped liquid treatment of laminated film

1974-09-23

1977-05-24

Thurlow, Jeffery R.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264 95, 264173, 264210R, B32B 3130

Patent

active

040253767

ABSTRACT:
In coextruded or extrusion coated, laminated, polymeric films which have been stretched by the inflated bubble technique, liquid can be entrapped between the collapsed bubble walls and can migrate to an interior layer of the laminate to treat same when the layer adjacent to the entrapped liquid is liquid permeable. For example, in a polyethylene
ylon/ethylene vinyl acetate/entrapped water/ethylene vinyl acetate
ylon/polyethylene laminated film the entrapped water will diffuse through the ethylene vinyl acetate layers to keep the nylon layers plasticized and impact resistant.

REFERENCES:
patent: 2317687 (1943-04-01), Larchar
patent: 3340091 (1967-09-01), Zweig
patent: 3397263 (1968-08-01), Werner
patent: 3651200 (1972-03-01), Kuga et al.
patent: 3860388 (1975-01-01), Haigh

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