Patents by Inventor Shogo Nakazawa
Shogo Nakazawa 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: 11279117Abstract: Provided is a fuel container composed of a multilayer structure containing: an ethylene-vinyl alcohol copolymer (A) layer; an adhesive resin (B) layer; a high-density polyethylene (C) layer; and a resin composition (D) layer, wherein the ethylene-vinyl alcohol copolymer (A) contains 15 to 44 mol % of ethylene, the adhesive resin (B) is a maleic anhydride-modified polyolefin having an acid value of 0.1 to 10 mgKOH/g and containing 1 to 8.5 ?mol/g of magnesium element, calcium element, zinc element, or a combination thereof, the resin composition (D) contains the ethylene-vinyl alcohol copolymer (A), the adhesive resin (B), and the high-density polyethylene (C), the thickness of the (A) layer, the (B) layer, and the (C) layer satisfies specific conditions, and the ethylene-vinyl alcohol copolymer (A), the adhesive resin (B), and the high-density polyethylene (C) satisfies specific conditions. The fuel container is excellent in fuel barrier properties and impact resistance and enables stable production.Type: GrantFiled: June 29, 2017Date of Patent: March 22, 2022Assignee: KURARAY CO., LTD.Inventors: Takeyuki Igarashi, Shogo Nakazawa
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Publication number: 20190248115Abstract: Provided is a fuel container composed of a multilayer structure containing: an ethylene-vinyl alcohol copolymer (A) layer; an adhesive resin (B) layer; a high-density polyethylene (C) layer; and a resin composition (D) layer, wherein the ethylene-vinyl alcohol copolymer (A) contains 15 to 44 mol % of ethylene, the adhesive resin (B) is a maleic anhydride-modified polyolefin having an acid value of 0.1 to 10 mgKOH/g and containing 1 to 8.5 ?mol/g of magnesium element, calcium element, zinc element, or a combination thereof, the resin composition (D) contains the ethylene-vinyl alcohol copolymer (A), the adhesive resin (B), and the high-density polyethylene (C), the thickness of the (A) layer, the (B) layer, and the (C) layer satisfies specific conditions, and the ethylene-vinyl alcohol copolymer (A), the adhesive resin (B), and the high-density polyethylene (C) satisfies specific conditions. The fuel container is excellent in fuel barrier properties and impact resistance and enables stable production.Type: ApplicationFiled: June 29, 2017Publication date: August 15, 2019Applicant: KURARAY CO., LTD.Inventors: Takeyuki IGARASHI, Shogo NAKAZAWA
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Patent number: 10287416Abstract: Provided is a thermoformed container having a superior appearance as a result of inhibition of coloring and generation of defects during the melt molding, having sufficient strength, and further having a self-purge feature in a production process. The thermoformed container includes an EVOH layer (A) containing an ethylene-vinyl alcohol copolymer (I) as a principal component, wherein the EVOH layer (A) contains a carbonyl compound (II), the carbonyl compound (II) is an unsaturated aldehyde (II-1), a saturated aldehyde (II-2), a saturated ketone (II-3) or a combination thereof, and the content of the carbonyl compound (II) in the EVOH layer (A) is 0.01 ppm or greater and 100 ppm or less. The carbonyl compound (II) is preferably an unsaturated aldehyde (II-1), and the unsaturated aldehyde (II-1) is preferably an unsaturated aliphatic aldehyde.Type: GrantFiled: September 17, 2014Date of Patent: May 14, 2019Assignee: KURARAY CO., LTD.Inventors: Hiroshi Kawai, Shogo Nakazawa
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Patent number: 10253161Abstract: Provided is a thermoformed container having a superior appearance as a result of inhibition of coloring and generation of defects during the melt molding, having sufficient strength, and further having a self-purge feature in a production process. The thermoformed container includes an EVOH layer (A) containing an ethylene-vinyl alcohol copolymer (I) as a principal component, wherein the EVOH layer (A) contains a carbonyl compound (II), the carbonyl compound (II) is an unsaturated aldehyde (II-1), a saturated aldehyde (II-2), a saturated ketone (II-3) or a combination thereof, and the content of the carbonyl compound (II) in the EVOH layer (A) is 0.01 ppm or greater and 100 ppm or less. The carbonyl compound (II) is preferably an unsaturated aldehyde (II-1), and the unsaturated aldehyde (II-1) is preferably an unsaturated aliphatic aldehyde.Type: GrantFiled: September 17, 2014Date of Patent: April 9, 2019Assignee: KURARAY CO., LTD.Inventors: Hiroshi Kawai, Shogo Nakazawa
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Patent number: 10207482Abstract: Provided is a resin composition exhibiting inhibited generation of defects in thermoforming, and having a superior appearance and sufficient strength. Also provided are a multilayer structure and a thermoformed container that exhibit superior appearance characteristics and impact resistance even when a recovered material obtained by repeatedly recovering a remnant, a scrap and the like of a sheet containing the resin composition is used. The resin composition contains: an ethylene-vinyl alcohol copolymer (A); a polyolefin (B); and a carbonyl compound (C) having 3 to 8 carbon atoms. The carbonyl compound (C) is an unsaturated aldehyde (C-1), a saturated aldehyde (C-2), a saturated ketone (C-3) or a combination thereof, and the content of the carbonyl compound (C) is 0.01 ppm or greater and 100 ppm or less.Type: GrantFiled: October 2, 2014Date of Patent: February 19, 2019Assignee: KURARAY CO., LTD.Inventors: Hiroshi Kawai, Shogo Nakazawa
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Patent number: 10066095Abstract: The present invention provides a resin composition containing: an ethylene-vinyl alcohol copolymer (A) having an ethylene content of 20 mol % or more and 60 mol % or less; a polyamide resin (B); a carboxylic acid metal salt (C); and an unsaturated aldehyde (D), the mass ratio (A/B) of the ethylene-vinyl alcohol copolymer (A) to the polyamide resin (B) being 60/40 or more and 95/5 or less, the content of the carboxylic acid metal salt (C) with respect to a resin content in terms of a metal element equivalent being 1 ppm or more and 500 ppm or less, and the content of the unsaturated aldehyde (D) with respect to the resin content being 0.05 ppm or more and 50 ppm or less.Type: GrantFiled: June 12, 2013Date of Patent: September 4, 2018Assignee: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Patent number: 9862818Abstract: The present invention provides a resin composition containing: (A) an ethylene-vinyl alcohol copolymer having an ethylene content of 20 mol % or more and 50 mol % or less; (B) an ethylene-vinyl alcohol copolymer having an ethylene content of 30 mol % or more and 60 mol % or less; and (C) an unsaturated aldehyde, a value obtained by subtracting the ethylene content of the ethylene-vinyl alcohol copolymer (A) from the ethylene content of the ethylene-vinyl alcohol copolymer (B) being 8 mol % or more, a mass ratio (A/B) of the ethylene-vinyl alcohol copolymer (A) to the ethylene-vinyl alcohol copolymer (B) being 60/40 or more and 95/5 or less, and the content of the unsaturated aldehyde (C) with respect to a resin content being 0.01 ppm or more and less than 100 ppm.Type: GrantFiled: June 12, 2013Date of Patent: January 9, 2018Assignee: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Patent number: 9862517Abstract: A blow molded container including (A) a layer containing an ethylene-vinyl alcohol copolymer as a principal component, in which the layer (A) contains an unsaturated aldehyde, and the content of the unsaturated aldehyde in the layer (A) is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (II) is preferably an unsaturated aliphatic aldehyde. The unsaturated aldehyde (II) is preferably at least one selected from the group consisting of crotonaldehyde, 2,4-hexadienal and 2,4,6-octatrienal. The layer (A) preferably contains a conjugated polyene compound, and the content of the conjugated polyene compound in the layer (A) is preferably 0.01 ppm or more and 1,000 ppm or less.Type: GrantFiled: March 27, 2013Date of Patent: January 9, 2018Assignee: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai, Nahoto Hayashi, Tatsuya Oshita
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Patent number: 9453094Abstract: The present invention provides a resin composition containing (A) an ethylene-vinyl alcohol copolymer and (B) an unsaturated aldehyde (B), in which the content of the unsaturated aldehyde (B) with respect to the resin composition containing the ethylene-vinyl alcohol copolymer is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (B) is preferably crotonaldehyde, 2,4-hexadienal, 2,4,6-octatrienal or a combination thereof. In addition, it is preferred that the resin composition further contains a boron compound, and the content of the boron compound is 100 ppm or more and 5,000 ppm or less. Also, it is preferred that the resin composition further contains a conjugated polyene compound, and the content of the conjugated polyene compound is 0.01 ppm or more and 1,000 ppm or less.Type: GrantFiled: September 2, 2015Date of Patent: September 27, 2016Assignee: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Publication number: 20160229987Abstract: Provided is a thermoformed container having a superior appearance as a result of inhibition of coloring and generation of defects during the melt molding, having sufficient strength, and further having a self-purge feature in a production process. The thermoformed container includes an EVOH layer (A) containing an ethylene-vinyl alcohol copolymer (I) as a principal component, wherein the EVOH layer (A) contains a carbonyl compound (II), the carbonyl compound (II) is an unsaturated aldehyde (II-1), a saturated aldehyde (II-2), a saturated ketone (II-3) or a combination thereof, and the content of the carbonyl compound (II) in the EVOH layer (A) is 0.01 ppm or greater and 100 ppm or less. The carbonyl compound (II) is preferably an unsaturated aldehyde (II-1), and the unsaturated aldehyde (II-1) is preferably an unsaturated aliphatic aldehyde.Type: ApplicationFiled: September 17, 2014Publication date: August 11, 2016Applicant: KURARAY CO., LTD.Inventors: Hiroshi KAWAI, Shogo NAKAZAWA
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Publication number: 20160221313Abstract: Provided is a resin composition exhibiting inhibited generation of defects in thermoforming, and having a superior appearance and sufficient strength. Also provided are a multilayer structure and a thermoformed container that exhibit superior appearance characteristics and impact resistance even when a recovered material obtained by repeatedly recovering a remnant, a scrap and the like of a sheet containing the resin composition is used. The resin composition contains: an ethylene-vinyl alcohol copolymer (A); a polyolefin (B); and a carbonyl compound (C) having 3 to 8 carbon atoms. The carbonyl compound (C) is an unsaturated aldehyde (C-1), a saturated aldehyde (C-2), a saturated ketone (C-3) or a combination thereof, and the content of the carbonyl compound (C) is 0.01 ppm or greater and 100 ppm or less.Type: ApplicationFiled: October 2, 2014Publication date: August 4, 2016Applicant: KURARAY CO., LTD.Inventors: Hiroshi KAWAI, Shogo NAKAZAWA
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Publication number: 20160053036Abstract: The present invention provides a resin composition containing (A) an ethylene-vinyl alcohol copolymer and (B) an unsaturated aldehyde (B), in which the content of the unsaturated aldehyde (B) with respect to the resin composition containing the ethylene-vinyl alcohol copolymer is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (B) is preferably crotonaldehyde, 2,4-hexadienal, 2,4,6-octatrienal or a combination thereof. In addition, it is preferred that the resin composition further contains a boron compound, and the content of the boron compound is 100 ppm or more and 5,000 ppm or less. Also, it is preferred that the resin composition further contains a conjugated polyene compound, and the content of the conjugated polyene compound is 0.01 ppm or more and 1,000 ppm or less.Type: ApplicationFiled: September 2, 2015Publication date: February 25, 2016Applicant: Kuraray Co., Ltd.Inventors: Shogo NAKAZAWA, Hiroshi KAWAI
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Patent number: 9163131Abstract: The present invention provides a resin composition containing (A) an ethylene-vinyl alcohol copolymer and (B) an unsaturated aldehyde (B), in which the content of the unsaturated aldehyde (B) with respect to the resin composition containing the ethylene-vinyl alcohol copolymer is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (B) is preferably crotonaldehyde, 2,4-hexadienal, 2,4,6-octatrienal or a combination thereof. In addition, it is preferred that the resin composition further contains a boron compound, and the content of the boron compound is 100 ppm or more and 5,000 ppm or less. Also, it is preferred that the resin composition further contains a conjugated polyene compound, and the content of the conjugated polyene compound is 0.01 ppm or more and 1,000 ppm or less.Type: GrantFiled: March 27, 2013Date of Patent: October 20, 2015Assignee: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Publication number: 20150159005Abstract: The present invention provides a resin composition containing: an ethylene-vinyl alcohol copolymer (A) having an ethylene content of 20 mol % or more and 60 mol % or less; a polyamide resin (B); a carboxylic acid metal salt (C); and an unsaturated aldehyde (D), the mass ratio (A/B) of the ethylene-vinyl alcohol copolymer (A) to the polyamide resin (B) being 60/40 or more and 95/5 or less, the content of the carboxylic acid metal salt (C) with respect to a resin content in terms of a metal element equivalent being 1 ppm or more and 500 ppm or less, and the content of the unsaturated aldehyde (D) with respect to the resin content being 0.05 ppm or more and 50 ppm or less.Type: ApplicationFiled: June 12, 2013Publication date: June 11, 2015Applicant: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Publication number: 20150152256Abstract: The present invention provides a resin composition containing: (A) an ethylene-vinyl alcohol copolymer having an ethylene content of 20 mol % or more and 50 mol % or less; (B) an ethylene-vinyl alcohol copolymer having an ethylene content of 30 mol % or more and 60 mol % or less; and (C) an unsaturated aldehyde, a value obtained by subtracting the ethylene content of the ethylene-vinyl alcohol copolymer (A) from the ethylene content of the ethylene-vinyl alcohol copolymer (B) being 8 mol % or more, a mass ratio (A/B) of the ethylene-vinyl alcohol copolymer (A) to the ethylene-vinyl alcohol copolymer (B) being 60/40 or more and 95/5 or less, and the content of the unsaturated aldehyde (C) with respect to a resin content being 0.01 ppm or more and less than 100 ppm.Type: ApplicationFiled: June 12, 2013Publication date: June 4, 2015Applicant: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Publication number: 20150105508Abstract: The present invention provides a resin composition containing (A) an ethylene-vinyl alcohol copolymer and (B) an unsaturated aldehyde (B), in which the content of the unsaturated aldehyde (B) with respect to the resin composition containing the ethylene-vinyl alcohol copolymer is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (B) is preferably crotonaldehyde, 2,4-hexadienal, 2,4,6-octatrienal or a combination thereof. In addition, it is preferred that the resin composition further contains a boron compound, and the content of the boron compound is 100 ppm or more and 5,000 ppm or less. Also, it is preferred that the resin composition further contains a conjugated polyene compound, and the content of the conjugated polyene compound is 0.01 ppm or more and 1,000 ppm or less.Type: ApplicationFiled: March 27, 2013Publication date: April 16, 2015Applicant: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai
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Publication number: 20150041462Abstract: A blow molded container including (A) a layer containing an ethylene-vinyl alcohol copolymer as a principal component, in which the layer (A) contains an unsaturated aldehyde, and the content of the unsaturated aldehyde in the layer (A) is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (II) is preferably an unsaturated aliphatic aldehyde. The unsaturated aldehyde (II) is preferably at least one selected from the group consisting of crotonaldehyde, 2,4-hexadienal and 2,4,6-octatrienal. The layer (A) preferably contains a conjugated polyene compound, and the content of the conjugated polyene compound in the layer (A) is preferably 0.01 ppm or more and 1,000 ppm or less.Type: ApplicationFiled: March 27, 2013Publication date: February 12, 2015Applicant: KURARAY CO., LTD.Inventors: Shogo Nakazawa, Hiroshi Kawai, Nahoto Hayashi, Tatsuya Oshita