GAS BARRIER LAMINATE AND PACKAGING BAG
    7.
    发明公开

    公开(公告)号:US20230356904A1

    公开(公告)日:2023-11-09

    申请号:US18246921

    申请日:2021-09-29

    Applicant: TOPPAN INC.

    CPC classification number: B65D65/40 B65D31/02 B65D2565/387

    Abstract: Provided is a gas barrier laminate being capable of hermetic sealing by heat sealing, and having a paper substrate and a vapor-deposited layer, in which the paper substrate has a basis weight of 30 to 100 g/m2, the water vapor transmission rate is 3 g/m2/d or less at 40° C. and 90%RH, the water vapor transmission rate obtained by folding the gas barrier laminate with the paper substrate placed on the outer side, rolling a roller having a weight of 2 kg thereon one time, opening a fold, and making measurement, is 4 g/m2/d or less at 40° C. and 90%RH, and the water vapor transmission rate obtained by folding the gas barrier laminate with the paper substrate placed on the inner side, rolling a roller having a weight of 2 kg thereon one time, opening a fold, and making measurement, is 4 g/m2/d or less at 40° C. and 90%RH.

    GAS BARRIER LAMINATE AND PACKAGING BODY USING THE SAME

    公开(公告)号:US20230312203A1

    公开(公告)日:2023-10-05

    申请号:US18206384

    申请日:2023-06-06

    Applicant: TOPPAN INC.

    CPC classification number: B65D65/42 C08K5/56

    Abstract: A gas barrier laminate including a gas barrier layer and a sealing layer laminated on a substrate in this order, wherein the gas barrier layer is a layer formed by applying and heat-drying a coating solution containing a water-soluble polymer and at least one of a metal alkoxide represented by a general formula M(OR1)n(where M is a metal element, R1 is an alkyl group, and n is the oxidation number of the metal element) and a hydrolyzate of the metal alkoxide, a content of the water-soluble polymer is 50 wt % or more relative to a total mass of a solid content in the coating solution, a total content of the metal alkoxide and the hydrolyzate thereof is 5 to 50 wt % relative to the total mass of the solid content in the coating solution, and the sealing layer contains an aqueous heat seal varnish.

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