Title:
COATED MEMBRANE WITH AN APERTURE FOR CONTROLLED ATMOSPHERE PACKAGE
Document Type and Number:
WIPO Patent Application WO2000054962
Kind Code:
A8
Abstract:
A coated membrane for use in controlling the oxygen and carbon dioxide ratio inside of a package that holds respiring produce such as fruits, vegetables or flowers. The coated membrane comprises a porous substrate, such as a polypropylene film, and has an oxygen permeance in the range of 5,000 to 30,000,000 cc/100 in<2>-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. An aperture of approximately 0.15 mm is placed in the coated membrane to allow the internal pressure to approximate the external pressure without a significant loss of relative humidity.
Inventors:
GONG SANNAI
Application Number:
PCT/US2000/005907
Publication Date:
April 19, 2001
Filing Date:
March 15, 2000
Export Citation:
Assignee:
RIVER RANCH FRESH FOODS SALINA (US)
International Classes:
A23B7/148; A23L3/3418; B65D81/20; C01B13/02; B65D85/34; (IPC1-7): B29D22/00; B29D23/00; B32B1/08; B32B3/10; B32B27/00; B32B27/08; B32B27/32; C01B3/00; C01B6/00; C02F1/70; C06B23/00; C06B43/00; C09K3/00
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