Coated membrane for controlled atmosphere package

Details Coated membrane for controlled atmosphere package Coated membrane for controlled atmosphere package

B - Operations, Transporting

01

D

B01D 69/12 (2006.01) A23B 7/00 (2006.01) B01D 71/38 (2006.01) B65D 81/24 (2006.01)

Patent

CA 2149920

2149920 9412040 PCTABS00032 A coated membrane (10) for use in controlling the oxygen and carbon dioxide ratio inside of a package (40) that holds respiring produce (44) such as fruits, vegetables or flowers. The coated membrane comprises a porous substrate (14), such as a polypropylene film, and has an oxygen permeance in the range of 5,000 to 30,000,000 cc/100 sq. in-atmosphere-day. The substrate is coated with a material that is substantially impermeable to oxygen, such as an acrylic emulsion, so that the amount of substrate surface area covered with the coating causes a decrease in the oxygen permeance of the substrate. The coating is applied to the substrate using a flexographic or rotogravure or rotary silkscreen process.

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