Patents by Inventor Yukiko Hirayama
Yukiko Hirayama 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: 10995211Abstract: An oxygen-absorbing resin composition containing an ethylene terephthalate type polyester resin and an organic oxygen absorber and, further, containing cobalt in an amount of 5 to 50 ppm and titanium in an amount of 1 to 15 ppm calculated as elements.Type: GrantFiled: August 4, 2017Date of Patent: May 4, 2021Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yoshiki Sawa, Toshiki Yamada, Yukiko Hirayama, Kanna Muramatsu
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Publication number: 20190255737Abstract: A formed body having a multilayered structure including inner and outer layers of a first ethylene terephthalate type polyester resin, and an oxygen-absorbing intermediate layer containing a non-polymer type organic oxygen absorber. The oxygen-absorbing intermediate layer, further, contains a second ethylene terephthalate type polyester resin that has relatively more copolymerizable units than the first ethylene terephthalate type polyester resin, the non-polymer type organic oxygen absorber being contained therein in an amount of not less than 5 parts by mass per 100 parts by mass of the second ethylene terephthalate type polyester resin.Type: ApplicationFiled: August 23, 2017Publication date: August 22, 2019Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yoshiki SAWA, Toshiki YAMADA, Yukiko HIRAYAMA, Kanna MURAMATSU
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Publication number: 20190218366Abstract: A formed body made from a resin and having a wall portion, the wall portion containing, as an oxygen-absorbing component, a non-polymeric oxygen-absorbing organic component in an amount of 0.5 to 2.5% by mass, and having a ratio of oxygen permeation rates expressed by the following formula that is suppressed to be not more than 42%: Ratio of oxygen permeation rates=(P/P0)×100 wherein P is an oxygen permeation rate (cc) through the wall portion, and P0 is an oxygen permeation rate (cc) through the wall portion of the same thickness but without containing the oxygen-absorbing component.Type: ApplicationFiled: September 28, 2017Publication date: July 18, 2019Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yukiko HIRAYAMA, Toshiki YAMADA, Yoshiki SAWA, Kanna MURAMATSU
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Publication number: 20190161610Abstract: An oxygen-absorbing resin composition containing an ethylene terephthalate type polyester resin and an organic oxygen absorber and, further, containing cobalt in an amount of 5 to 50 ppm and titanium in an amount of 1 to 15 ppm calculated as elements.Type: ApplicationFiled: August 4, 2017Publication date: May 30, 2019Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yoshiki SAWA, Toshiki YAMADA, Yukiko HIRAYAMA, Kanna MURAMATSU
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Patent number: 10233306Abstract: An oxygen-absorbing resin composition containing a base resin having a thermoplastic resin; and an oxygen-absorbing component having at least the one selected from the group consisting of an ester, an amide, an imide or a dicarboxylic acid derived from an acid anhydride represented by the following formula (1), wherein, a ring X is an aliphatic ring having an unsaturated bond, n is a number of the substituents Y bonded to the ring X and is an integer of 0 or 1, and Y is an alkyl group, and a polymer having a constituent unit stemming from the acid anhydride. An oxygen-absorbing polyester resin composition exhibits excellent oxygen-absorbing property even in the absence of transition metal catalyst without accompanied by the deterioration of the polyester resin used as a the base resin, the oxygen-absorbing property being strong enough for maintaining gas-barrier properties.Type: GrantFiled: December 26, 2012Date of Patent: March 19, 2019Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yoshiki Sawa, Yukiko Hirayama, Toshiki Yamada
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Publication number: 20180194059Abstract: A multilayered preform including inner and outer layers of an ethylene terephthalate type polyester resin, and at least one intermediate layer of at least a lowly crystalline ethylene terephthalate type polyester resin and a gas-barrier aromatic polyamide resin, wherein the lowly crystalline ethylene terephthalate type polyester resin contains, as a copolymerizable component, a cyclohexanedimethanol in an amount of 15 to 20 mol % or an isophthalic acid in an amount of 7.5 to 15 mol %, a weight ratio of the lowly crystalline ethylene terephthalate type polyester resin and the gas-barrier aromatic polyamide resin is in a range of 50:50 to 75:25, a weight ratio of the intermediate layer is not less than 1% by weight but is less than 10% by weight per the whole preform, and a haze is not less than 5% in a portion where a multilayered structure has been formed.Type: ApplicationFiled: July 13, 2016Publication date: July 12, 2018Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yukiko HIRAYAMA, Toshiki YAMADA, Yoshiki SAWA
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Publication number: 20180141733Abstract: A multilayered container obtained by heat-forming a multilayered sheet or a multilayered preform that includes inner and outer layers of an ethylene terephthalate type polyester resin, and at least one intermediate layer of at least a lowly crystalline ethylene terephthalate type polyester resin and a gas-barrier aromatic polyamide resin, wherein a difference of refractive index (?RI) between the lowly crystalline ethylene terephthalate type polyester resin and the gas-barrier aromatic polyamide resin represented by the following formula (1), ?RI=|RIE?RIA|??(1) wherein RIE and RIA are refractive indexes of injection-formed plates made, respectively, from the lowly crystalline ethylene terephthalate type polyester resin and the gas-barrier aromatic polyamide resin after they have been monoaxially stretched into 3 times, is not more than 0.03, and a haze in a side surface of the container is not more than 5%.Type: ApplicationFiled: June 30, 2016Publication date: May 24, 2018Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yukiko HIRAYAMA, Toshiki YAMADA, Takayuki ISHIHARA, Yuuki TASHIRO
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Patent number: 9919291Abstract: An oxygen-absorbing resin composition including a base resin (A) which is a thermoplastic resin, an oxygen-absorbing component (B) which is a compound having an unsaturated alicyclic structure, and an oxidation promotion component (C) for promoting the oxidation of the oxygen-absorbing component (B); wherein the oxygen-absorbing component (B) is an imide compound having a molecular weight of not more than 2,000 and obtained by heat-treating an amide having been obtained by reacting an acid anhydride represented by the following formula (1): wherein the ring X is an alicyclic ring having an unsaturated bond, and Y is an alkyl group, with an aromatic amine, and wherein the oxidation promotion component (C) is a compound having a benzyl hydrogen.Type: GrantFiled: May 17, 2016Date of Patent: March 20, 2018Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Toshiki Yamada, Yukiko Hirayama, Yoshiki Sawa
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Patent number: 9764308Abstract: To provide an oxygen-absorbing polyester resin composition which exhibits excellent oxygen-absorbing capability even in the absence of transition metal catalyst without affected by the glass transition temperature of a polyester resin that is contained as a base resin. The oxygen-absorbing polyester resin composition including a base resin (A) which is a polyester resin, an oxygen-absorbing component (B) which is a compound having an unsaturated alicyclic structure, and an oxidation promotion component (C) for promoting the oxidation of the oxygen-absorbing component (B), said oxidation promotion component (C) being a compound having a benzyl hydrogen.Type: GrantFiled: January 12, 2012Date of Patent: September 19, 2017Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Toshiki Yamada, Yukiko Hirayama, Yoshiki Sawa
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Publication number: 20170066903Abstract: An oxygen-absorbing resin composition containing (A) a base material which comprises a thermoplastic resin; (B) a bisimide compound derived from a tetrahydrophthalic anhydride and an aliphatic diamine; and (C) a transition metal catalyst; wherein the bisimide compound (B) is contained in amounts of 0.1 to 10.0% by weight, and the transition metal catalyst (C) is contained in amounts of 10 to 350 ppm calculated as metal. Despite of containing an organic oxygen absorber, the oxygen-absorbing resin composition of the invention is free from the problem of yellowing caused by the absorption of oxygen.Type: ApplicationFiled: March 12, 2015Publication date: March 9, 2017Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yoshiki SAWA, Yukiko HIRAYAMA, Toshiki YAMADA
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Publication number: 20160325871Abstract: A multilayered stretch-blow-molded container obtained by biaxially stretch-blow-molding a multilayered preform that includes inner and outer layers of an ethylene terephthalate polyester resin, and at least one intermediate layer of a lowly crystallizable ethylene terephthalate polyester resin and a gas-barrier aromatic polyamide resin. A difference of refractive index (?RI) between the lowly crystallizable ethylene terephthalate polyester resin and the gas-barrier aromatic polyamide resin is represented by formula (1), ?RI=|RIE?RIA|??(1) is not more than 0.03, wherein RIE and RIA are refractive indices of injection-molded plates made, respectively, from the lowly crystallizable ethylene terephthalate polyester resin and the aromatic polyamide resin after they have been biaxially stretched into 3×3 times simultaneously, and the haze in the body portion is not more than 3%.Type: ApplicationFiled: January 23, 2015Publication date: November 10, 2016Applicant: Toyo Seikan Group Holdings, Ltd.Inventors: Yukiko HIRAYAMA, Toshiki YAMADA, Hideaki NAGAHAMA
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Publication number: 20160256852Abstract: An oxygen-absorbing resin composition including a base resin (A) which is a thermoplastic resin, an oxygen-absorbing component (B) which is a compound having an unsaturated alicyclic structure, and an oxidation promotion component (C) for promoting the oxidation of the oxygen-absorbing component (B); wherein the oxygen-absorbing component (B) is an imide compound having a molecular weight of not more than 2,000 and obtained by heat-treating an amide having been obtained by reacting an acid anhydride represented by the following formula (1): wherein the ring X is an alicyclic ring having an unsaturated bond, and Y is an alkyl group, with an aromatic amine, and wherein the oxidation promotion component (C) is a compound having a benzyl hydrogen.Type: ApplicationFiled: May 17, 2016Publication date: September 8, 2016Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Toshiki YAMADA, Yukiko HIRAYAMA, Yoshiki SAWA
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Publication number: 20140335297Abstract: An oxygen-absorbing resin composition containing a base resin having a thermoplastic resin; and an oxygen-absorbing component having at least the one selected from the group consisting of an ester, an amide, an imide or a dicarboxylic acid derived from an acid anhydride represented by the following formula (1), wherein, a ring X is an aliphatic ring having an unsaturated bond, n is a number of the substituents Y bonded to the ring X and is an integer of 0 or 1, and Y is an alkyl group, and a polymer having a constituent unit stemming from the acid anhydride. An oxygen-absorbing polyester resin composition exhibits excellent oxygen-absorbing property even in the absence of transition metal catalyst without accompanied by the deterioration of the polyester resin used as a the base resin, the oxygen-absorbing property being strong enough for maintaining gas-barrier properties.Type: ApplicationFiled: December 26, 2012Publication date: November 13, 2014Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yoshiki Sawa, Yukiko Hirayama, Toshiki Yamada
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Publication number: 20130284617Abstract: To provide an oxygen-absorbing polyester resin composition which exhibits excellent oxygen-absorbing capability even in the absence of transition metal catalyst without affected by the glass transition temperature of a polyester resin that is contained as a base resin. The oxygen-absorbing polyester resin composition including a base resin (A) which is a polyester resin, an oxygen-absorbing component (B) which is a compound having an unsaturated alicyclic structure, and an oxidation promotion component (C) for promoting the oxidation of the oxygen-absorbing component (B), said oxidation promotion component (C) being a compound having a benzyl hydrogen.Type: ApplicationFiled: January 12, 2012Publication date: October 31, 2013Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Toshiki Yamada, Yukiko Hirayama, Yoshiki Sawa