Method and apparatus for producing polymeric films

Details Method and apparatus for producing polymeric films Method and apparatus for producing polymeric films

1991-07-02

1992-06-30

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264569, 425 721, 4253261, B29C 4788

Patent

active

051260964

ABSTRACT:
An apparatus and method for the production of polymeric films by a blown film process is disclosed. Polymeric films produced from crystallizable linear polymers are extruded through a die extruder, expanded by the injection of a gas inside the tubular film, cooled at the point of extrusion from the die, and further cooled at the point of maximal expansion or the frost line to produce a film having substantially enhanced optical characteristics.

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patent: 4479766 (1984-10-01), Planeta
patent: 4606879 (1986-08-01), Cerisano

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