Patents by Inventor Shichen DOU
Shichen DOU 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: 20240066847Abstract: Multi-layer biaxially oriented compostable composite film with a sealant layer formulation has improved heat seal initiation temperature, enhanced plateau seal strength, and broadened heat seal temperature range, while optical clarity is maintained, and film modulus (noise) is reduced. The film includes a core layer comprising a PLA-rich biodegradable composite resin, and a heat sealable layer comprising 20 to 60 wt % amorphous polylactic acid resin, and 40 to 80 wt % flexible compostable polymeric modifier Y having a glass transition temperature of Tg?0° C. and a melting temperature of 56° C.?Tm?90° C. Specifically, the flexible compostable polymeric modifier includes 20 to 70 wt % polybutylene succinate-co-adipate (PBSA) copolymer and 5 to 35 wt % polycaprolactone as a promoter of low heat seal initiation temperature (SIT) and hermeticity. The inventive compostable composite film is desirable to have improved home compostability.Type: ApplicationFiled: December 29, 2022Publication date: February 29, 2024Inventors: Shichen DOU, Joshua R. CLOUTIER
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Publication number: 20240066848Abstract: A biaxially oriented multi-layer composite film comprises a PHA-rich core layer and a heat sealant layer and a second outer skin layer. The core layer comprises a PHA resin at an amount of more than 50 wt % of a total weight of the core layer and a modifier X, the modifier X includes PLA, PLA copolymers, PBSA and PCL; the heat sealant layer comprises a PLA resin and a modifier Y, the modifier Y including PBSA and PCL resins is at an amount of about 20 wt % to 95 wt % of the total weight of the heat sealant layer. The composite film has low SIT and improved home compostability.Type: ApplicationFiled: February 27, 2023Publication date: February 29, 2024Inventors: Shichen DOU, Joshua R. CLOUTIER
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Patent number: 11370205Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: GrantFiled: December 23, 2019Date of Patent: June 28, 2022Assignee: Toray Plastics (America), Inc.Inventors: Shichen Dou, Keunsuk P. Chang
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Patent number: 11370204Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: GrantFiled: March 29, 2018Date of Patent: June 28, 2022Assignee: Toray Plastics (America), Inc.Inventors: Shichen Dou, Keunsuk P. Chang
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Patent number: 11338561Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: GrantFiled: March 13, 2020Date of Patent: May 24, 2022Assignee: Toray Plastics (America), Inc.Inventors: Shichen Dou, Keunsuk P. Chang
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Patent number: 11198279Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: GrantFiled: March 29, 2018Date of Patent: December 14, 2021Assignee: Toray Plastics (America), Inc.Inventors: Shichen Dou, Keunsuk P. Chang
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Publication number: 20210229408Abstract: Embodiments relates to a multilayer film comprising a core layer, a first outer layer and second outer layer. In an embodiment, the core layer includes a polypropylene; the first outer layer comprises (a) a polymethylpentene, (b) a butene copolymer, and (c) a polydimethylsiloxane and/or a crosslinked silicone; and the second outer layer comprises (a) a polymethylpentene, (b) a butene copolymer, and (c) a polydimethylsiloxane and/or a crosslinked silicone. Yet, another embodiment relates the core layer comprises polypropylene; the first outer layer comprises a mini random polypropylene resin, wherein the first outer layer comprises a first corona treated surface; and the second outer layer comprises a polymethylpentene copolymer, a crystalline polypropylene, a polydimethylsiloxane, a crosslinked silicone and/or a fluoropolymer.Type: ApplicationFiled: January 29, 2020Publication date: July 29, 2021Inventors: Shichen Dou, Masato Ushijima
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Publication number: 20200215803Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: ApplicationFiled: March 13, 2020Publication date: July 9, 2020Applicant: Toray Plastics (America), Inc.Inventors: Shichen DOU, Keunsuk P. CHANG
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Publication number: 20200122443Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: ApplicationFiled: December 23, 2019Publication date: April 23, 2020Applicant: Toray Plastics (America), Inc.Inventors: Shichen DOU, Keunsuk P. CHANG
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Publication number: 20200070484Abstract: A multi-layer biaxially oriented polypropylene film (BOPP) can include a core layer; an outer functional layer with the functionalities of heat-sealing, winding, printing, or receiving coatings or metallization; and an outer heat-sealable layer with partially crosslinked polydialkylsiloxane to provide excellent slipperiness and machinability. The partially crosslinked polydialkylsiloxane is not detrimental to the metal adhesion and printability of the functional layer; and maintains excellent heat-seal properties, low and consistent COF, and low and consistent hot slip properties.Type: ApplicationFiled: August 31, 2018Publication date: March 5, 2020Applicant: Toray Plastics (America), Inc.Inventors: Shichen DOU, Keunsuk P. CHANG
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Publication number: 20190299580Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: ApplicationFiled: March 29, 2018Publication date: October 3, 2019Applicant: Toray Plastics (America), Inc.Inventors: Shichen DOU, Keunsuk P. CHANG
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Publication number: 20190299579Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: ApplicationFiled: March 29, 2018Publication date: October 3, 2019Applicant: Toray Plastics (America), Inc.Inventors: Shichen DOU, Keunsuk P. CHANG
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Publication number: 20190299578Abstract: The present disclosure is directed to a film formulation that resulted in a substantially non-migratory cold seal release film with improved blocking resistance. Specifically, the multilayered biaxially oriented polypropylene film can include a core layer of polypropylene homopolymer; a first outer layer on one side of the core layer that can be suitable for sealing, printing, or coating; and a second outer layer on the opposite side of the core layer that is a blocking resistant layer comprising thermoplastic polymers which reduce blocking tendency.Type: ApplicationFiled: March 29, 2018Publication date: October 3, 2019Applicant: Toray Plastics (America), Inc.Inventors: Shichen DOU, Keunsuk P. CHANG
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Patent number: 10357913Abstract: Described are transparent oriented polypropylene films with improved barrier properties and methods of making these films. The films and methods include a core layer comprising polypropylene, hydrocarbon resin, and polyethylene wax to improve moisture vapor barrier properties, an optional barrier layer comprising polar polymers to improve oxygen barrier properties, and optional skin layers to improve heat sealing, winding, printing, and/or adhesion.Type: GrantFiled: January 29, 2018Date of Patent: July 23, 2019Assignee: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen Dou, Tracy A. Paolilli, Keunsuk P. Chang
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Publication number: 20180162035Abstract: Described are transparent oriented polypropylene films with improved barrier properties and methods of making these films. The films and methods include a core layer comprising polypropylene, hydrocarbon resin, and polyethylene wax to improve moisture vapor barrier properties, an optional barrier layer comprising polar polymers to improve oxygen barrier properties, and optional skin layers to improve heat sealing, winding, printing, and/or adhesion.Type: ApplicationFiled: January 29, 2018Publication date: June 14, 2018Applicant: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen DOU, Tracy A. PAOLILLI, Keunsuk P. CHANG
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Publication number: 20170282507Abstract: Described are coextruded multi-layer biaxially oriented polyolefin barrier films with improved processability, moisture vapor barrier, and stiffness. The disclosed films comprise a cyclic olefin copolymer (COC) core layer blended with hydrogenated hydrocarbon resin and at least one outer layer having functionality for solvent resistance, heat sealing, or winding, or printing/coatings or adhesion for lamination.Type: ApplicationFiled: March 31, 2016Publication date: October 5, 2017Applicant: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen DOU, Keunsuk P. CHANG
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Patent number: 9669607Abstract: A laminate film comprising a core layer comprising of a high crystalline propylene homopolymer blended with an amount of hydrocarbon resin; crystalline polyethylene wax; and a fluoropolymer and/or a metal oxide nanoparticle which exhibits excellent transparency and moisture vapor barrier properties. The laminate film could further have additional layers such as a second polyolefin resin-containing layer, or a heat-sealable polyolefin-containing layer, or combinations thereof.Type: GrantFiled: March 28, 2016Date of Patent: June 6, 2017Assignee: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen Dou, Keunsuk P. Chang
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Patent number: 9630383Abstract: A laminate film comprising a core layer comprising of a high crystalline propylene homopolymer blended with an amount of hydrocarbon resin; crystalline polyethylene wax; and a fluoropolymer and/or a metal oxide nanoparticle which exhibits excellent transparency and moisture vapor barrier properties. The laminate film could further have additional layers such as a second polyolefin resin-containing layer, or a heat-sealable polyolefin-containing layer, or combinations thereof.Type: GrantFiled: May 20, 2014Date of Patent: April 25, 2017Assignee: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen Dou, Keunsuk P. Chang
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Publication number: 20170015821Abstract: Described are transparent oriented polypropylene films with improved barrier properties and methods of making these films. The films and methods include a core layer comprising polypropylene, hydrocarbon resin, and polyethylene wax to improve moisture vapor barrier properties, an optional barrier layer comprising polar polymers to improve oxygen barrier properties, and optional skin layers to improve heat sealing, winding, printing, and/or adhesion.Type: ApplicationFiled: July 13, 2015Publication date: January 19, 2017Applicant: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen DOU, Tracy A. PAOLILLI, Keunsuk P. CHANG
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Patent number: 9492962Abstract: Described are metallized biaxially oriented polylactic acid (BOPLA) films with a novel formulation that exhibits a softer feel and quieter sound, without jeopardizing film making stability. It has been found that when these films are metallized, moisture barrier properties are surprisingly improved compared to conventional metallized BOPLA films. Specifically, the moisture barrier of the films may be 2.0 g/m2/day or less at 38° C. and 90% relative humidity. The films can be used, for example, in packaging applications. The films have characteristics that are beneficial to converting processes, are economical, and maintain bio-compostability similar to typical BOPLA films.Type: GrantFiled: March 31, 2011Date of Patent: November 15, 2016Assignee: TORAY PLASTICS (AMERICA), INC.Inventors: Shichen Dou, Mark S. Lee, Claudio M. Paulino, Nao Yokota, Keunsuk P. Chang