Patents by Inventor Edgard Chow
Edgard Chow has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230311461Abstract: The present disclosure provides a multilayer structure including a first polyolefin layer comprising a first polyolefin resin, a gas barrier layer comprising ethylene-vinyl alcohol copolymer, and a second polyolefin layer comprising a second polyolefin resin. The present disclosure further provides a package made of the multilayer structure and also methods of use thereof.Type: ApplicationFiled: March 7, 2023Publication date: October 5, 2023Applicant: Kuraray Co., Ltd.Inventors: Diana Maya, Edgard Chow, Makoto Okamoto
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Publication number: 20230294378Abstract: A multilayer article including a chemical-resistant layer comprising a polyurea, where the chemical-resistant layer is not an adhesive layer between two layers, and a barrier layer comprising an ethylene-vinyl alcohol copolymer. The multilayer article has good flexibility and toughness, resistance to water and chemicals, and excellent barrier properties to organic solvents and gases.Type: ApplicationFiled: March 17, 2023Publication date: September 21, 2023Applicant: KURARAY CO., LTD.Inventors: Edgard Chow, Emilio Morales, Makoto Okamoto
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Patent number: 11738547Abstract: A gas permeable layer is formed from an ethylene-vinyl alcohol copolymer resin composition comprising an ethylene-vinyl alcohol copolymer (A), a polyolefin (B), and an acid-modified ethylene-?-olefin copolymer (C).Type: GrantFiled: September 10, 2021Date of Patent: August 29, 2023Assignee: Kuraray Co., Ltd.Inventors: Edgard Chow, Emilio Morales, Wataru Hirose
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Patent number: 11649342Abstract: A monolayer film is provided which contains ethylene vinyl alcohol copolymer (EVOH), contamination from dirt and a compatibilizer, that can be used for producing trash bags and the like, as well as a method to successfully recycle fumigation films containing EVOH and contamination from dirt into such a monolayer film.Type: GrantFiled: September 12, 2019Date of Patent: May 16, 2023Assignee: KURARAY CO., LTD.Inventors: Edgard Chow, Diana Maya, Wataru Hirose
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Patent number: 11400694Abstract: A multilayer article having at least one layer of an ethylene vinyl alcohol (EVOH) resin composition comprising of an ethylene-vinyl alcohol copolymer, an unmodified ethylene-?-olefin copolymer and acid modified ethylene-?-olefin copolymer as described below, which is suitable for use in making (or as) a storage bag for agricultural products, food, drink, pharmaceutical, cosmetic, industrial chemical, detergent products.Type: GrantFiled: August 28, 2019Date of Patent: August 2, 2022Assignee: KURARAY CO., LTD.Inventors: Edgard Chow, Astrid Torres, Wataru Hirose
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Patent number: 11383497Abstract: There is provided a co-injection-molded multilayer structure having a barrier layer and outer layers laminated on both sides of the barrier layer, wherein the barrier layer is made of a resin composition comprising an ethylene-vinyl alcohol copolymer (A) and an alkali metal salt (B) of a higher fatty acid having a melting point of 250° C. or lower; a content of the alkali metal salt (B) in the barrier layer is 50 to 1500 ppm in terms of metal atoms; and the outer layers are made of a resin composition comprising an unmodified polypropylene (E) and a maleic anhydride-modified polypropylene (F) having a lower melt viscosity than that of the unmodified polypropylene (E). Although it has no adhesive layers, the co-injection-molded multilayer structure exhibits excellent adhesiveness between the barrier layer made of an EVOH resin composition and the outer layer made of a polypropylene resin composition.Type: GrantFiled: October 17, 2017Date of Patent: July 12, 2022Assignee: KURARAY CO., LTD.Inventors: Edgard Chow, Gene Medlock, Wataru Hirose
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Publication number: 20220134724Abstract: The disclosure relates to a multilayer film having an ethylene-vinyl alcohol copolymer (EVOH) layer, and a container type house system having the same.Type: ApplicationFiled: November 1, 2021Publication date: May 5, 2022Applicant: Kuraray Co., Ltd.Inventor: Edgard Chow
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Publication number: 20220081523Abstract: A gas permeable layer is formed from an ethylene-vinyl alcohol copolymer resin composition comprising an ethylene-vinyl alcohol copolymer (A), a polyolefin (B), and an acid-modified ethylene-?-olefin copolymer (C).Type: ApplicationFiled: September 10, 2021Publication date: March 17, 2022Applicant: Kuraray Co., Ltd.Inventors: Edgard Chow, Emilio Morales, Wataru Hirose
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Patent number: 11130319Abstract: A multilayer article (such as a film) suitable for use as a fumigation barrier, the multilayer article comprising at least one an ethylene vinyl alcohol (EVOH) based barrier layer formed from a resin composition predominantly comprising an EVOH component of one or more specific types of ethylene-vinyl alcohol copolymers as described herein.Type: GrantFiled: December 28, 2018Date of Patent: September 28, 2021Assignee: Kuraray Co., Ltd.Inventors: Wataru Hirose, Edgard Chow
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Publication number: 20210237390Abstract: A flexible pipe comprising at least one layer of ethylene-vinyl alcohol resin (EVOH) as the innermost layer, wherein the pipe is suitable for use under high pressure, is configured to retain mechanical properties at pressures up to at least about 1500 psig, and can also retain its structural function upon decompression.Type: ApplicationFiled: January 29, 2021Publication date: August 5, 2021Applicant: KURARAY CO., LTD.Inventors: Edgard CHOW, Astrid TORRES
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Patent number: 10995189Abstract: A resin composition contains an ethylene-vinyl alcohol copolymer (A) in which an ethylene unit content is from 10 to 60 mol %, a hindered amine-based compound (B) having a 2,2,6,6-tetraalkylpiperidine ring structure and having an alkoxy group bonded to a nitrogen atom in the structure, and a hindered phenol-based compound (C) having an ester bond or an amide bond. The resin composition contains 0.1 to 5 parts by mass of the hindered amine-based compound (B) and 0.2 to 5 parts by mass of the hindered phenol-based compound (C) with respect to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), and a mass ratio (C)/(B) is from 0.2 to 3.6.Type: GrantFiled: September 13, 2017Date of Patent: May 4, 2021Assignee: KURARAY CO., LTD.Inventors: Edgard Chow, Kentaro Yoshida, Tatsuya Hasegawa
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Publication number: 20210101375Abstract: The present invention relates to a polyfluoroalkyl substance (PFAS) diffusion preventing system comprising a multilayer polyolefin based article (such as a geomembrane) with at least one layer of ethylene-vinyl alcohol resin (EVOH), wherein the system contains at least one of a cover, a liner and/or a container as such multilayer article.Type: ApplicationFiled: October 8, 2020Publication date: April 8, 2021Applicant: KURARAY CO., LTD.Inventor: Edgard CHOW
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Patent number: 10836146Abstract: Provided is a polyvinyl chloride (“PVC”)/ethylene-vinyl alcohol (“EVOH”) multilayer sheet used for the fabrication of liners and covers for the geotechnical industry (“geomembrane”), which sheet has both good flexibility and excellent barrier properties to organic solvents and gases.Type: GrantFiled: May 10, 2019Date of Patent: November 17, 2020Assignee: KURARAY CO., LTD.Inventors: Edgard Chow, Astrid Torres, Wataru Hirose
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Patent number: 10814596Abstract: A silage film having at least one layer of a resin composition containing an ethylene-vinyl alcohol copolymer (A) and a hydroxy group-containing compound (B). In the resin composition containing the ethylene-vinyl alcohol copolymer (A) and the hydroxy group-containing compound (B), the hydroxy group-containing compound (B) has a molecular weight of less than or equal to 200, a ratio of number of hydroxy groups per molecule to the molecular weight ranging from 0.02 to 0.03, and a melting point of greater than or equal to 23° C., and a content of the hydroxy group-containing compound (B) in the resin composition ranging from 3% to 15% by mass. The silage film has excellent oxygen barrier property and stretchability (suitability for wrapping) and can be suitably used for long-term storage of silage.Type: GrantFiled: November 25, 2015Date of Patent: October 27, 2020Assignee: KURARAY CO., LTD.Inventors: Edgard Chow, Wataru Hirose
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Publication number: 20200291197Abstract: A resin composition contains an ethylene-vinyl alcohol copolymer (A) in which an ethylene unit content is from 10 to 60 mol %, a hindered amine-based compound (B) having a 2,2,6,6-tetraalkylpiperidine ring structure and having an alkoxy group bonded to a nitrogen atom in the structure, and a hindered phenol-based compound (C) having an ester bond or an amide bond. The resin composition contains 0.1 to 5 parts by mass of the hindered amine-based compound (B) and 0.2 to 5 parts by mass of the hindered phenol-based compound (C) with respect to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), and a mass ratio (C)/(B) is from 0.2 to 3.6.Type: ApplicationFiled: September 13, 2017Publication date: September 17, 2020Applicant: KURARAY CO., LTD.Inventors: Edgard CHOW, Kentaro YOSHIDA, Tatsuya HASEGAWA
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Publication number: 20200180279Abstract: There is provided a co-injection-molded multilayer structure having a barrier layer and outer layers laminated on both sides of the barrier layer, wherein the barrier layer is made of a resin composition comprising an ethylene-vinyl alcohol copolymer (A) and an alkali metal salt (B) of a higher fatty acid having a melting point of 250° C. or lower; a content of the alkali metal salt (B) in the barrier layer is 50 to 1500 ppm in terms of metal atoms; and the outer layers are made of a resin composition comprising an unmodified polypropylene (E) and a maleic anhydride-modified polypropylene (F) having a lower melt viscosity than that of the unmodified polypropylene (E). Although it has no adhesive layers, the co-injection-molded multilayer structure exhibits excellent adhesiveness between the barrier layer made of an EVOH resin composition and the outer layer made of a polypropylene resin composition.Type: ApplicationFiled: October 17, 2017Publication date: June 11, 2020Applicant: KURARAY CO., LTD.Inventors: Edgard CHOW, Gene MEDLOCK, Wataru HIROSE
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Publication number: 20200087493Abstract: A monolayer film is provided which contains ethylene vinyl alcohol copolymer (EVOH), contamination from dirt and a compatibilizer, that can be used for producing trash bags and the like, as well as a method to successfully recycle fumigation films containing EVOH and contamination from dirt into such a monolayer film.Type: ApplicationFiled: September 12, 2019Publication date: March 19, 2020Applicant: KURARAY CO., LTD.Inventors: Edgard CHOW, Diana Maya, Wataru Hirose
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Publication number: 20200070483Abstract: A multilayer article having at least one layer of an ethylene vinyl alcohol (EVOH) resin composition comprising of an ethylene-vinyl alcohol copolymer, an unmodified ethylene-?-olefin copolymer and acid modified ethylene-?-olefin copolymer as described below, which is suitable for use in making (or as) a storage bag for agricultural products, food, drink, pharmaceutical, cosmetic, industrial chemical, detergent products.Type: ApplicationFiled: August 28, 2019Publication date: March 5, 2020Applicant: KURARAY CO., LTD.Inventors: Edgard CHOW, Astrid Torres, Wataru Hirose
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Patent number: 10544248Abstract: OBJECT An object is to provide a resin composition capable of forming a crosslinked product that is excellent in hot water resistance and excellent in interlayer adhesiveness when formed into a multilayered structure. SOLUTION The resin composition contains an ethylene-vinyl alcohol copolymer (A) and a crosslinking agent (B) with the crosslinking agent (B) in an amount of 0.6 to 15 parts by mass relative to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), the crosslinking agent (B) being a powder obtained by impregnating a porous body (BS) with a crosslinkable compound (BL) having three or more polymerizable groups and a melting point of no greater than 40° C.Type: GrantFiled: June 16, 2017Date of Patent: January 28, 2020Assignee: KURRAY CO., LTDInventors: Edgard Chow, Robert Armstrong, Kentaro Yoshida
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Publication number: 20190344547Abstract: Provided is a polyvinyl chloride (“PVC”)/ethylene-vinyl alcohol (“EVOH”) multilayer sheet used for the fabrication of liners and covers for the geotechnical industry (“geomembrane”), which sheet has both good flexibility and excellent barrier properties to organic solvents and gases.Type: ApplicationFiled: May 10, 2019Publication date: November 14, 2019Applicant: KURARAY CO., LTD.Inventors: Edgard CHOW, Astrid Torres, Wataru Hirose