Patents by Inventor Hisanori Tobita
Hisanori Tobita 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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Patent number: 10414565Abstract: A heat-shrinkable multilayer film for being filled with contents, comprising an outer surface layer (A) comprising a heat-resistant thermoplastic resin, an intermediate layer (B) comprising a polyamide-based resin, an inner surface layer (D) comprising an ethylene-based copolymer, and adhesion strength between inner surface layers after treatment with 80° C. hot water being not less than 10 N/15 mm. The polyamide-based heat-shrinkable multilayer film obtained in this manner has optimal characteristics for applications that primarily require strength, and has greatly improved self-weldability demanded in packaging films for meat products such as fresh and processed meats.Type: GrantFiled: April 28, 2014Date of Patent: September 17, 2019Assignee: KUREHA CORPORATIONInventors: Tadayoshi Itoh, Yuta Sekiya, Hisanori Tobita
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Publication number: 20190077562Abstract: A heat shrinkable stretched multilayer film for skin packaging comprising a crosslinked resin layer, a gas barrier resin layer, and a heat sealing resin layer sequentially arranged in this order from the outer side, and having dry thermal shrinkage rate of 10 to 55% in each of the machine direction (MD) and of the transverse direction (TD) at 120° C., and tensile elongation at break of 190% or greater in the machine direction at 120° C.Type: ApplicationFiled: November 9, 2018Publication date: March 14, 2019Applicant: KUREHA CORPORATIONInventors: Shota NAMBU, Hisanori TOBITA, Tadayoshi ITOH
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Publication number: 20170355500Abstract: A heat shrinkable stretched multilayer film for skin packaging comprising a crosslinked resin layer, a gas barrier resin layer, and a heat sealing resin layer sequentially arranged in this order from the outer side, and having dry thermal shrinkage rate of 10 to 55% in each of the machine direction (MD) and of the transverse direction (TD) at 120° C., and tensile elongation at break of 190% or greater in the machine direction at 120° C.Type: ApplicationFiled: October 27, 2015Publication date: December 14, 2017Inventors: SHOTA NAMBU, HISANORI TOBITA, TADAYOSHI ITOH
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Publication number: 20160152390Abstract: A heat-shrinkable multilayer film for being filled with contents, comprising an outer surface layer (A) comprising a heat-resistant thermoplastic resin, an intermediate layer (B) comprising a polyamide-based resin, an inner surface layer (D) comprising an ethylene-based copolymer, and adhesion strength between inner surface layers after treatment with 80° C. hot water being not less than 10 N/15 mm. The polyamide-based heat-shrinkable multilayer film obtained in this manner has optimal characteristics for applications that primarily require strength, and has greatly improved self-weldability demanded in packaging films for meat products such as fresh and processed meats.Type: ApplicationFiled: April 28, 2014Publication date: June 2, 2016Inventors: TADAYOSHI ITOH, YUTA SEKIYA, HISANORI TOBITA
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Patent number: 7998385Abstract: A transparent multilayer stretched product is produced through a process including: providing a resin laminate including at least on layer of polyglycolic acid resin, heat-forming and cooling the resin laminate, reheating the resin laminate until the polyglycolic acid resin is crystallized to be opaque and then stretching the reheated resin laminate. The thus-obtained multilayer stretched product is excellent in gas-barrier property in addition to the transparency and is suitable as a packaging material or container.Type: GrantFiled: September 29, 2004Date of Patent: August 16, 2011Assignee: Kureha CorporationInventors: Kazuyuki Yamane, Ryo Kato, Hisanori Tobita
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Publication number: 20110101573Abstract: There is provided a multilayer hollow container having a laminar structure including a PGA resin and a co-laminated resin, such as an aromatic polyester resin, that takes advantage of the gas-barrier property of the PGA resin layer to the utmost and is suitable for bottles of a small volume required to exhibit a higher level of gas-barrier property. The multilayer hollow container has a co-stretched multilayer wall structure including a layer of a polyglycolic acid resin comprising at least 60 wt. % of recurring unit represented by a formula of —(O.CH2.CO)— . . . (1), and a layer of co-laminated resin comprising an aromatic polyester resin or an aliphatic polyester resin other than polyglycolic acid resin laminated on at least one surface of the polyglycolic acid resin layer, and satisfying a formula of: T×w/v?0.8×10?3 . . . (2), wherein T represents an oxygen gas permeability (ml/container/day/atm), v represents a volume (ml) of the container, and w represents a content (wt.Type: ApplicationFiled: December 23, 2010Publication date: May 5, 2011Inventors: Takashi SATO, Daisuke Itoh, Hisanori Tobita, Satoru Suzuki
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Patent number: 7666486Abstract: A multi-layer biaxially stretched blow bottle having a 3-layer structure of PET/nylon MXD6/PET or a 5-layer structure of PET/nylon MXD6/PET/nylon MXD6/PET, wherein the oxygen gas transmission coefficient of the nylon MXD6 layer is at most 6.0×10?14 cm3·cm/cm2·sec·cmHg as measured under conditions of a temperature of 23° C. and a relative humidity of 80%, and a production process of the bottle by biaxial stretch blow molding at a low stretching temperature and high draw ratios.Type: GrantFiled: April 15, 2005Date of Patent: February 23, 2010Assignee: Kureha CorporationInventors: Takashi Sato, Hisanori Tobita, Daisuke Itoh, Norio Ozawa
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Publication number: 20070224375Abstract: A multi-layer biaxially stretched blow bottle having a 3-layer structure of PET/nylon MXD6/PET or a 5-layer structure of PET/nylon MXD6/PET/nylon MXD6/PET, wherein the oxygen gas transmission coefficient of the nylon MXD6 layer is at most 6.0×10?14 cm3·cm/cm2·sec·cmHg as measured under conditions of a temperature of 23° C. and a relative humidity of 80%, and a production process of the bottle by biaxial stretch blow molding at a low stretching temperature and high draw ratios.Type: ApplicationFiled: April 15, 2005Publication date: September 27, 2007Inventors: Takashi Sato, Hisanori Tobita, Daisuke Itoh, Norio Ozawa
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Publication number: 20070172611Abstract: There is provided a multilayer hollow container having a laminar structure including a PGA resin and a co-laminated resin, such as an aromatic polyester resin, that takes advantage of the gas-barrier property of the PGA resin layer to the utmost and is suitable for bottles of a small volume required to exhibit a higher level of gas-barrier property. The multilayer hollow container has a co-stretched multilayer wall structure including a layer of a polyglycolic acid resin comprising at least 60 wt. % of recurring unit represented by a formula of —(O.CH2.CO)— . . . (1), and a layer of co-laminated resin comprising an aromatic polyester resin or an aliphatic polyester resin other than polyglycolic acid resin laminated on at least one surface of the polyglycolic acid resin layer, and satisfying a formula of: T×w/v?0.8×10?3 . . . (2), wherein T represents an oxygen gas permeability (ml/container/day/atm), v represents a volume (ml) of the container, and w represents a content (wt.Type: ApplicationFiled: January 27, 2005Publication date: July 26, 2007Inventors: Takashi Sato, Daisuke Itoh, Hisanori Tobita, Satoru Suzuki
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Publication number: 20060255495Abstract: A transparent multilayer stretched product is produced through a process including: providing a resin laminate including at least on layer of polyglycolic acid resin, heat-forming and cooling the resin laminate, reheating the resin laminate until the polyglycolic acid resin is crystallized to be opaque and then stretching the reheated resin laminate. The thus-obtained multilayer stretched product is excellent in gas-barrier property in addition to the transparency and is suitable as a packaging material or container.Type: ApplicationFiled: September 29, 2004Publication date: November 16, 2006Inventors: Kazuyuki Yamane, Ryo Kato, Hisanori Tobita
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Publication number: 20050221032Abstract: A shaped container of biodegradable, heat-resistant and rigid resin having a laminate structure including a glycolic acid polymer layer and another biodegradable resin layer, is formed by shaping under heating so that another biodegradable resin forms an outer and/or inner layer. The container is excellent in biodegradability, stiffness and heat resistance as well as excellent see-through of contents, and is suitable as a temporary preservation container for food, etc.Type: ApplicationFiled: May 28, 2003Publication date: October 6, 2005Inventors: Kazuyuki Yamane, Yukichika Kawakami, Tomoaki Sato, Hisanori Tobita, Takehisa Suzuki
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Patent number: 6592975Abstract: A laminated packaging material which comprises at least three layers of polymer materials comprising a surface layer, one or more intermediate layers adjacent thereto, and another surface layer, characterized in that the intermediate layer adjacent to each surface layer contains a lubricant, at least one of the intermediate layers has gas-barrier properties, and the total amount of a lubricant in the two surface layers is smaller than that in the intermediate layer(s) adjacent thereto. In production of the packaging material, adhesion of a lubricant to a die lip is reduced. The laminated packaging material has excellent transparency and gloss.Type: GrantFiled: June 22, 2000Date of Patent: July 15, 2003Assignee: Kureha Chemical Industry Co., Ltd.Inventors: Takahisa Ueyama, Tadayoshi Itoh, Hisanori Tobita
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Patent number: 6342282Abstract: The invention provides a heat-shrinkable multi-layer film comprising at least a thermoplastic resin layer as the outermost layer (A), a gas barrier resin layer as a core layer (B) and a sealing resin layer as the innermost layer (C), and optionally an adhesive layer between the individual layers, wherein (1) the sealing resin layer of the innermost layer (C) is a layer formed of a resin material (b) comprising a linear ethylene-1-octene copolymer (a) obtained by using a constrained geometry catalyst and having an 1-octene content not lower than 1 wt. % but lower than 20 wt. % and a density higher than 0.885 g/cm3 but not higher than 0.960 g/cm3, and (2) an intermediate layer (D1) formed of at least one resin (c) selected from the group consisting of polyamide resins, thermoplastic polyester resins and ethylene copolymer resins is provided between the outermost layer (A) and the core layer (B). The film has excellent sealing properties, clarity, mechanical strength, stretchability and bag-making property.Type: GrantFiled: May 11, 2000Date of Patent: January 29, 2002Assignee: Kureha Kagaku Kogyo K.K.Inventors: Junji Yoshii, Hajime Tsukamoto, Yoshihiro Matsukura, Hisanori Tobita
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Patent number: 6146726Abstract: The invention provides a heat-shrinkable multi-layer film comprising at least a thermoplastic resin layer as the outermost layer (A), a gas barrier resin layer as a core layer (B) and a sealing resin layer as the innermost layer (C), and optionally an adhesive layer between the individual layers, wherein (1) the sealing resin layer of the innermost layer (C) is a layer formed of a resin material (b) comprising a linear ethylene-1-octene copolymer (a) obtained by using a constrained geometry catalyst and having an 1-octene content not lower than 1 wt. % but lower than 20 wt. % and a density higher than 0.885 g/cm.sup.3 but not higher than 0.960 g/cm.sup.3, and (2) an intermediate layer (D1) formed of at least one resin (c) selected from the group consisting of polyamide resins, thermoplastic polyester resins and ethylene copolymer resins is provided between the outermost layer (A) and the core layer (B).Type: GrantFiled: May 28, 1997Date of Patent: November 14, 2000Assignees: Kureha Kagaku Koygo K.K., Kureha Plastics Co., LtdInventors: Junji Yoshii, Hajime Tsukamoto, Yoshihiro Matsukura, Hisanori Tobita