Polyester-based film for keeping freshness and packaging bag

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United States of America Patent

PATENT NO 12030288
APP PUB NO 20210229410A1
SERIAL NO

15734978

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Abstract

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The present invention provides a polyester-based film for keeping freshness, comprising a polyester-based resin layer comprising, ethylene terephthalate as a main component, wherein the polyester-based film satisfies the requirements (1) to (4); that can extend the shelf life of the contents such as fruits and vegetables when using as a packaging bag, increase a commodity value, and re-close even after the packaging bag opened.

    (1) the film has an O2-transmission rate of 50 [cc/(m2·d·atm)] or more and 1000 [cc/(m2·d·atm)] or less when measured at a temperature of 23° C. and a relative humidity of 65% RH,(2) the film has a CO2-transmission rate of 200 [cc/(m2·d·atm)] or more and 5000 [cc/(m2·d·atm)] or less when measured at a temperature of 23° C.(3) the film has a water vapor transmission rate of 20 [g/(m2·d)] or more and 400 [g/(m2·d)] or less when measured at a temperature of 40° C. and a relative humidity of 90% RH, and(4) the film has an angle after folding the film of 20° or more and 80° or less.

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Patent Owner(s)

Patent OwnerAddress
TOYOBO CO LTD2-8 DOJIMA HAMA 2-CHOME KITA-KU OSAKA-SHI OSAKA 530-8230

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Haruta, Masayuki Tsuruga, JP 86 438
Hashida, Tomoyuki Osaka, JP 2 3
Ishimaru, Shintaro Tsuruga, JP 28 100
Maruyama, Hiroko Tsuruga, JP 6 48

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