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公开(公告)号：US11926117B2
公开(公告)日：2024-03-12
申请号：US16344120
申请日：2017-11-24
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim , So-Yeon Kim
CPC classification number: B29D7/01 , B32B27/08 , B32B27/20 , B32B27/36 , B32B37/153 , B32B38/0012 , C08J5/18 , C08L67/02 , B32B2038/0028 , B32B2307/306 , B32B2307/516 , B32B2307/736 , C08J2367/02 , C08J2467/02 , C08L2201/08 , C08L2203/16 , C08L2205/025 , C08L2205/03
Abstract: The present invention relates to an MDO thermoresistant heat-shrinkable multilayer film of a copolymer polyester having excellent thermal resistance. In particular, the present invention provides an MDO thermoresistant heat-shrinkable multilayer film that includes multiple skin layers capable of improving thermal resistance formed on a substrate layer capable of providing high shrinkage, and simultaneously has excellent thermal resistance and high shrinkage properties through MD orientation instead of the conventional TD orientation method.
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公开(公告)号：US10550223B2
公开(公告)日：2020-02-04
申请号：US15505529
申请日：2015-08-24
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Ji Yea Lee , Sung-Gi Kim , Sun Dongbang
IPC: C08G63/199 , C08J5/18 , C08L67/02 , C08G63/18 , C08K3/10 , C08L67/03 , C08G63/183 , C08G63/672 , C08K5/098 , C08G63/127 , C08G63/137 , C08G63/181
Abstract: The present invention relates to a polyester resin composition capable of having an excellent shrinkage rate, being heat-shrunk at a low temperature, and improving adhesion properties, without impairing insulation properties in a state of heat-shrinkable films, and a method for preparing the same. The present polyester resin composition comprises: a copolymerized polyester resin including a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid; and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexyl methyl 4′-(hydroxymethyl)cyclohexane carboxylate, and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol, an alkali metal compound, and an alkaline earth metal compound, wherein the alkali metal compound and the alkaline earth metal compound are contained in an amount that the content ratio of the alkali metal element/the alkaline earth metal element derived therefrom is 0.01 to 1.
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公开(公告)号：US11560457B2
公开(公告)日：2023-01-24
申请号：US16344101
申请日：2017-11-24
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim , So-Yeon Kim
IPC: C08J7/043 , B32B27/08 , B32B27/18 , B32B27/36 , C08L67/02 , C08G63/183 , C08G63/199 , B29D7/01 , C08G63/127 , C08G63/672 , B29C55/06 , B29L31/00 , C08G63/137 , B29K105/02 , B29K7/00 , C08J5/18
Abstract: The present invention relates to an MDO heat-shrinkable film of a copolymer polyester having excellent thermal resistance. In particular, the present invention provides a copolymer polyester MDO (machine direction orientation) thermoresistant heat-shrinkable film that consists of a copolymer polyester resin including isosorbide and 1,4-cyclohexanedimethanol at an optimized content ratio as a diol component copolymerized with an acid component including terephthalic acid, and having a number average molecular weight of 18,000 g/mol or more, and can be used for labels, cap seals, direct packaging, etc. of various containers due to the high shrink initiation temperature.
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公开(公告)号：US11020947B2
公开(公告)日：2021-06-01
申请号：US15504595
申请日：2015-07-17
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim
Abstract: This disclosure relates to a thermo-shrinkable polyester film with excellent UV absorbance and heat resistance. According to one embodiment of the invention, provided is a thermo-shrinkable polyester film comprising a first resin layer comprising polyester resin comprising residues of dicarboxylic acid components comprising aromatic dicarboxylic acid, and residues of diol components comprising 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexanecarboxylate, and 4,4-(oxybis(methylene)bis)cyclohexane methanol; and a second resin layer comprising the polyester resin and a UV absorber, formed on at least one side of the first layer.
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公开(公告)号：US11267934B2
公开(公告)日：2022-03-08
申请号：US16704156
申请日：2019-12-05
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Ji Yea Lee , Sung-Gi Kim , Sun Dongbang
IPC: C08L67/02 , C08G63/199 , C08G63/18 , C08K3/10 , C08L67/03 , C08G63/183 , C08G63/672 , C08J5/18 , C08K5/098 , C08G63/127 , C08G63/137 , C08G63/181
Abstract: The present invention relates to a polyester resin composition capable of having an excellent shrinkage rate, being heat-shrunk at a low temperature, and improving adhesion properties, without impairing insulation properties in a state of heat-shrinkable films, and a method for preparing the same. The present polyester resin composition comprises: a copolymerized polyester resin including a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid; and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexyl methyl 4′-(hydroxymethyl)cyclohexane carboxylate, and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol, an alkali metal compound, and an alkaline earth metal compound, wherein the alkali metal compound and the alkaline earth metal compound are contained in an amount that the content ratio of the alkali metal element/the alkaline earth metal element derived therefrom is 0.01 to 1.
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Patent Agency Ranking
公开(公告)号：US11203676B2
公开(公告)日：2021-12-21
申请号：US16878081
申请日：2020-05-19
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim , Ji Yea Lee
Abstract: There is provided a heat shrinkable film comprising a polyester based copolymer capable of having an excellent shrinkage rate and being heat shrunk at a low temperature. The heat shrinkable film according to an exemplary embodiment of the present invention includes a polyester based copolymer, wherein the polyester based copolymer includes: a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid; and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate represented by the following Chemical Formula 1 and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol represented by the following Chemical Formula 2.
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公开(公告)号：US10696806B2
公开(公告)日：2020-06-30
申请号：US14898566
申请日：2014-06-16
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim , Ji Yea Lee
Abstract: A heat shrinkable film comprising a polyester based copolymer is provided. The heat shrinkable film according to an exemplary embodiment of the present invention includes a polyester based copolymer, wherein the polyester based copolymer includes: a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid; and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate represented by the following Chemical Formula 1 and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol represented by the following Chemical Formula 2;
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公开(公告)号：US11236210B2
公开(公告)日：2022-02-01
申请号：US16858069
申请日：2020-04-24
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim
IPC: C08J5/18 , B29C48/00 , C08G63/199 , C08G63/672 , C08L67/02 , B29C45/00 , B29C55/00 , B29K67/00 , B29L7/00
Abstract: A composition for forming a heat shrinkable film includes a polyethylene terephthalate (PET) resin having an inherent viscosity of 0.50 to 1.2 dl/g, and a polyester based copolymer including a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate represented by the following Chemical Formula 1 and a residue derived from 4,4-(oxybis(methylene)bis)cyclohexane methanol represented by the following Chemical Formula 2.
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公开(公告)号：US10723852B2
公开(公告)日：2020-07-28
申请号：US15919676
申请日：2018-03-13
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim
IPC: C08J5/18 , B29C48/00 , C08G63/199 , C08G63/672 , C08L67/02 , B29C45/00 , B29C55/00 , B29K67/00 , B29L7/00
Abstract: There is provided a composition for forming a heat shrinkable film capable of providing a heat shrinkable film capable of having an excellent shrinkage rate and being heat-shrunk at a low temperature. The composition for forming a heat shrinkable film includes a polyethylene terephthalate (PET) resin having an inherent viscosity of 0.50 to 1.2 dl/g, and a polyester based copolymer including a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate represented by the following Chemical Formula 1 and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol represented by the following Chemical Formula 2.
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公开(公告)号：US10717811B2
公开(公告)日：2020-07-21
申请号：US14888649
申请日：2014-04-30
Applicant: SK CHEMICALS CO., LTD.
Inventor： Seol-Hee Lim , Sung-Gi Kim
IPC: C08G63/672 , C08G63/199 , C08J5/18
Abstract: A polyester based copolymer resin which can be used a heat shrinkable film is disclosed. The polyester based copolymer resin includes a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid, and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol. The heat shrinkable film including polyester based copolymer resin has a shrinkage initiation temperature of 60° C. or less, the maximum heat shrinkage rate at 60° C. of 4% or more, and the maximum heat shrinkage rate at 90° C. of 80% or more.
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