Process for producing uniaxial polyolefin/filler films for contr

Details Process for producing uniaxial polyolefin/filler films for contr Process for producing uniaxial polyolefin/filler films for contr

1988-03-14

1989-11-07

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264102, 264143, 264154, 2642106, 26421112, 2642888, B29B 906

Patent

active

048790788

ABSTRACT:
A uniaxially oriented, polyolefin film is prepared by melt blending a mixture of a polyolefin, an inert filler, a processing aid such as calcium stearate, and optionally a stabilizer, maintaining the moisture level in the melt blend below 700 ppm, casting a film, and uniaxially stretching the film at least about 2 times its original casting dimensions in one direction until the film has a sufficient number of elongated, narrow shaped, microporous voids in order to create a CO.sub.2 and O.sub.2 permeance in the range of 5,000 to 10,000,000 cc/100.sup.2 -atm-day. Such a film is used in a controlled atmosphere packaging container as a panel in a window for a controlled flow or flux of CO.sub.2 and O.sub.2 through its wall in an otherwise gas impermeable container.

REFERENCES:
patent: 3844865 (1974-10-01), Elton et al.
patent: 3903234 (1975-09-01), Ikeda et al.
patent: 3975455 (1976-08-01), Falender et al.
patent: 4153659 (1979-05-01), Recktenwald et al.
patent: 4350655 (1982-09-01), Hoge
patent: 4698372 (1987-10-01), Moss
patent: 4704238 (1987-11-01), Okuyama et al.
patent: 4705812 (1987-11-01), Ito et al.
patent: 4705813 (1987-11-01), Ito et al.

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