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公开(公告)号：US20190153180A1
公开(公告)日：2019-05-23
申请号：US16256297
申请日：2019-01-24
发明人： Shengsheng Liu , Fenghua DENG
摘要： Disclosed herein is a method of producing a composite film that includes a biaxially oriented polyethylene terephthalate film substrate layer and a crosslinked layer on a surface thereof, wherein the crosslinked layer comprises a reaction product of a functionalized ethylene vinyl acetate copolymer comprising multiple COOH groups per molecule, wherein the functionalized ethylene vinyl acetate copolymer comprises 10-50 weight % of vinyl acetate monomer units and an organic crosslinker comprising multiple reactive groups per molecule, wherein the organic crosslinker is a melamine, said reactive groups being reactive with the COOH groups. The method also includes applying a solution comprising the functionalized ethylene vinyl acetate copolymer and the organic crosslinker in an organic solvent or mixture thereof to the biaxially oriented polyethylene terephthalate film substrate, followed by drying to form the crosslinked layer.
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公开(公告)号：US20180257842A1
公开(公告)日：2018-09-13
申请号：US15980843
申请日：2018-05-16
CPC分类号： B65D81/34 , B32B1/02 , B32B27/08 , B32B27/304 , B32B27/34 , B32B27/36 , B32B2307/306 , B32B2307/31 , B32B2307/738 , B32B2439/70 , B65B1/02 , Y10T428/1334 , Y10T428/31736 , Y10T428/31739 , Y10T428/31786 , Y10T428/31797
摘要： A laminate includes the following substantially coextensive layers in the following order: (a) a non-sealable, self-supporting, thermoformable copolyester film layer having a first surface and a second surface, the second surface constituting an outermost, exposed surface of the laminate; (b) a laminating adhesive layer on the first surface of the thermoformable copolyester film layer; and (c) a self-supporting, thermoformable structural film layer having a first surface and a second surface, the first surface contacting the laminating adhesive layer. Polyethylene terephthalate constitutes at least 80% by weight of the self-supporting thermoformable copolyester film layer; the thermoformable structural film layer includes a polymer selected from the group consisting of polyamides, polypropylene, polyethylene, polyethylene terephthalate, ionomers, ethylene acrylic acid copolymers, ethylene vinyl acetate copolymers, polystyrene, ethylene vinyl alcohol copolymers and polyvinylidene chloride; the thermoformable copolyester film layer, the structural film layer and the laminate each shrink less than 5% in length and width upon exposure to boiling water for five seconds; and the laminate is thermoformable and its chloroform-soluble extractives meet the requirements of paragraph h(1) of 21 CFR § 177.1630 as defined herein.
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公开(公告)号：US20170218152A1
公开(公告)日：2017-08-03
申请号：US15501490
申请日：2015-08-03
发明人： Shengsheng LIU , Fenghua DENG
CPC分类号： C08J7/042 , B05D1/28 , B05D3/0272 , C08J7/047 , C08J2367/02 , C08J2400/104 , C08J2400/105 , C08J2423/08
摘要： A composite film includes a polyester film substrate layer and a crosslinked layer on a surface thereof, wherein the crosslinked layer includes a reaction product of a) a functionalized ethylene vinyl acetate copolymer including multiple COOH groups or multiple alcoholic OH groups per molecule; and b) an organic crosslinker including multiple reactive groups per molecule, the reactive groups being reactive with the COOH or alcoholic OH groups; wherein the adhesion strength between the substrate layer and the crosslinked layer is at least 177 g/cm (450 g/inch). A method of joining the composite film, optionally further including a heat-sealable polymer layer on the crosslinked layer, to a container or a self-supporting film, includes contacting the crosslinked layer or the heat-sealable polymer layer with the container or the self-supporting film or under heat sealing conditions.
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