Patents by Inventor Takuya Kashiwakura
Takuya Kashiwakura 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).
-
Publication number: 20230348143Abstract: The disclosure relates to a method for producing a drawn/ironed can, including drawing and ironing a coated metal sheet, the coated metal sheet having an inner surface coating film at least on a surface to be a can inner surface. A glass transition temperature (Tg) of a polyester resin contained in the inner surface coating film is 55° C. or higher, an ironing rate in the drawing and ironing is 40% or greater, and a processing speed during ironing in the drawing and ironing is 2000 mm/sec or higher. Thus, even in a case where a coated metal sheet having a coating film with excellent flavor sorption resistance and contains a polyester resin having a high glass transition temperature as a main component is used, occurrence of a coating film defect during molding and occurrence of coating film peeling due to heat treatment can be suppressed.Type: ApplicationFiled: January 24, 2022Publication date: November 2, 2023Applicant: Toyo Seikan Group Holdings, Ltd.Inventors: Takuya KASHIWAKURA, Hiromi YAMAMOTO, Arata SAKURAGI, Nan ZHANG
-
Publication number: 20230202715Abstract: The disclosure relates to a drawn/ironed can having at least an inner surface coating film on a can inner surface side, the inner surface coating film containing a polyester resin and a curing agent, and a stress relaxation ratio of the inner surface coating film after 10 minutes at 1% elongation in a can bottom portion is 50% or higher under a test condition of 100° C., whereby metal exposure due to severe processing such as drawing or ironing and coating film peeling due to heat treatment after molding are effectively prevented.Type: ApplicationFiled: May 10, 2021Publication date: June 29, 2023Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Hiromi YAMAMOTO, Takuya KASHIWAKURA, Arata SAKURAGI, Nan ZHANG
-
Publication number: 20230061883Abstract: A coating composition including a polyester resin blend as a principal resin, the polyester resin blend containing a polyester resin having a glass transition temperature of higher than 40° C. and an acid value of less than 10 mg KOH/g and (B) a polyester resin having a glass transition. temperature of higher than 40° C. and an acid value of 10 mg KOH/g or more and less than 50 mg KOH/g, and (C) a curing agent. Alternatively, a coating composition containing a polyester resin, as a principal resin, having a glass transition temperature of 60° C. or higher, a resol-type phenol resin. and/or an amino resin as a curing agent, and an organic sulfonic acid-based catalyst and/or a phosphoric acid-based catalyst as a curing catalyst, in which a content of the curing catalyst is less than. 0.2 part by mass per 100 parts by mass of the principal resin.Type: ApplicationFiled: February 2, 2021Publication date: March 2, 2023Inventors: Arata SAKURAGI, Takuya KASHIWAKURA, Nan ZHANG, Hiromi YAMAMOTO
-
Publication number: 20220025208Abstract: A coating composition containing a polyester resin (A) having an acid value of not lower than 5 mgKOH/g, a polyester resin (B) having an acid value of lower than 5 mgKOH/g, and a curing agent having a functional group capable of crosslinking reaction with a carboxyl group. Assuming that the total solid content mass of the polyester resin (A) and the polyester resin (B) is 100 parts by mass, the content of the polyester resin (A) is in a range of more than 50 parts by mass to not more than 97 parts by mass, and the content of the polyester resin (B) is in a range of not less than 3 parts by mass to less than 50 parts by mass. Also disclosed is a coated metal substrate and a drawn-ironed can formed of the coated metal substrate.Type: ApplicationFiled: November 8, 2019Publication date: January 27, 2022Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Hiromi YAMAMOTO, Arata SAKURAGI, Nan ZHANG
-
Publication number: 20220001417Abstract: A coated metal sheet provided with a coating on at least one surface thereof. The coating contains a polyester resin as a main component and a ?-hydroxyalkylamide compound as a curing agent. Since the coating has an elongation of not less than 200% under test conditions of 90° C., the coated metal sheet has excellent can-making workability without metal exposure even if the coated metal sheet is subjected to severe working such as drawing and ironing. Also disclosed is a drawn-ironed can formed of the coated metal sheet.Type: ApplicationFiled: November 8, 2019Publication date: January 6, 2022Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Hiromi YAMAMOTO, Arata SAKURAGI, Nan ZHANG
-
Publication number: 20210403747Abstract: An aqueous coating composition and a coated metal sheet having a coating formed of the aqueous coating composition. The aqueous coating composition includes a base resin of a polyester resin having an acid value of not lower than 10 mgKOH/g and lower than 70 mgKOH/g and a glass transition temperature of not lower than 35° C., and the composition contains ?-hydroxyalkylamide compound as a curing agent. The equivalent ratio of the hydroxyl group of the ?-hydroxyalkylamide compound to the carboxyl group of the polyester resin (OH group/COOH group molar ratio) is in the range of 0.8 to 3.0.Type: ApplicationFiled: November 8, 2019Publication date: December 30, 2021Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Nan ZHANG, Arata SAKURAGI, Hiromi YAMAMOTO
-
Publication number: 20210079255Abstract: The present invention relates to an aqueous coating composition containing a polyester resin having an acid value of not less than 30 mgKOH/g and less than 70 mgKOH/g as a base resin, and a curing agent having a functional group capable of crosslinking with a carboxyl group. The aqueous coating composition is excellent in workability and can form a coating having favorable curability and corrosion resistance, and thus can be suitably used for a metal container like a beverage can or a metal lid.Type: ApplicationFiled: November 13, 2018Publication date: March 18, 2021Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Arata SAKURAGI, Nan ZHANG, Hiromi YAMAMOTO
-
Publication number: 20200062992Abstract: A polyester type aqueous coating composition for metal cans such as beverage cans and can lids. The aqueous coating composition contains a polyester resin having an acid value of not less than 5 mgKOH/g but less than 30 mgKOH/g and a curing agent having a functional group capable of reacting with a carboxyl group possessed by the polyester resin.Type: ApplicationFiled: May 10, 2018Publication date: February 27, 2020Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Arata SAKURAGI, Nan ZHANG, Hiromi YAMAMOTO
-
Patent number: 10557205Abstract: An organic resin-covered surface-treated metal sheet having formed on at least one surface of a metal sheet a surface-treatment coating and an organic resin film on the coating. The surface-treatment coating contains a polyvalent metal compound and a poly-carboxylic acid type polymer containing not less than 60 mol % constituent units derived from at least one polymerizable monomer selected from acrylic acid, maleic acid, methacrylic acid, and itaconic acid. The surface-treatment coating measured for its infrared-ray absorption spectra has a peak height ratio (?/?) of a maximum absorption peak height (?) in a wave number range of 1660 to 1760 cm?1 and a maximum absorption peak height (?) in a wave number range of 1490 to 1659 cm?1 is from 0.37 to 2.35. Also disclosed is a can body made from the organic resin-covered surface-treated metal sheet and a can lid made from the organic resin-covered surface-treated metal sheet.Type: GrantFiled: August 14, 2019Date of Patent: February 11, 2020Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya Kashiwakura, Yuji Funagi, Tomohiro Miyai, Arata Sakuragi
-
Publication number: 20190368048Abstract: An organic resin-covered surface-treated metal sheet having formed on at least one surface of a metal sheet a surface-treatment coating and an organic resin film on the coating. The surface-treatment coating contains a polyvalent metal compound and a poly-carboxylic acid type polymer containing not less than 60 mol % constituent units derived from at least one polymerizable monomer selected from acrylic acid, maleic acid, methacrylic acid, and itaconic acid. The surface-treatment coating measured for its infrared-ray absorption spectra has a peak height ratio (?/?) of a maximum absorption peak height (?) in a wave number range of 1660 to 1760 cm?1 and a maximum absorption peak height (?) in a wave number range of 1490 to 1659 cm?1 is from 0.37 to 2.35. Also disclosed is a can body made from the organic resin-covered surface-treated metal sheet and a can lid made from the organic resin-covered surface-treated metal sheet.Type: ApplicationFiled: August 14, 2019Publication date: December 5, 2019Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya Kashiwakura, Yuji Funagi, Tomohiro Miyai, Arata Sakuragi
-
Patent number: 10457832Abstract: A chromium-free surface-treated metal sheet includes a metal sheet, a surface-treatment coating that contains a polycarboxylic acid type polymer and a zirconium compound and that is formed on at least one surface of the metal sheet, and a coating that contains a polyester resin, a phenol resin and an acid catalyst and that is formed on the surface-treatment coating. The surface-treated metal sheet can be used for producing cans and can lids maintaining excellent dent resistance even for acidic beverages, without permitting the organic resin film formed on the coating to be peeled even under high-temperature and wet environments during a sterilization treatment or the like, and maintaining excellent hot water-resistant adhering property.Type: GrantFiled: May 18, 2016Date of Patent: October 29, 2019Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya Kashiwakura, Yuji Funagi, Tomohiro Miyai, Arata Sakuragi
-
Patent number: 10422040Abstract: An organic resin-covered surface-treated metal sheet having formed on at least one surface of a metal sheet a surface-treatment coating and an organic resin film on the surface-treatment coating. The surface-treatment coating contains a poly-carboxylic acid type polymer and a polyvalent metal compound. The surface-treatment coating measured for its infrared-ray absorption spectra has a peak height ratio (?/?) of a maximum absorption peak height (?) in a wave number range of 1660 to 1760 cm?1 and a maximum absorption peak height (?) in a wave number range of 1490 to 1659 cm?1 of from 0.05 to 2.35.Type: GrantFiled: March 28, 2016Date of Patent: September 24, 2019Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya Kashiwakura, Yuji Funagi, Tomohiro Miyai, Arata Sakuragi
-
Patent number: 10246779Abstract: A surface-treated aluminum plate obtained by forming, on at least one surface of an aluminum plate, a conversion-coated layer that contains a polyester resin and a zirconium compound or a titanium compound. The surface-treated aluminum plate excellently adheres to an organic resin coating and can be used as a material for producing cans featuring excellent corrosion resistance and shock resistance.Type: GrantFiled: February 26, 2018Date of Patent: April 2, 2019Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Tomohiro Miyai, Takuya Kashiwakura, Yuji Funagi
-
Publication number: 20180291232Abstract: A chromium-free surface-treated metal sheet includes a metal sheet, a surface-treatment coating that contains a polycarboxylic acid type polymer and a zirconium compound and that is formed on at least one surface of the metal sheet, and a coating that contains a polyester resin, a phenol resin and an acid catalyst and that is formed on the surface-treatment coating. The surface-treated metal sheet can be used for producing cans and can lids maintaining excellent dent resistance even for acidic beverages, without permitting the organic resin film formed on the coating to be peeled even under high-temperature and wet environments during a sterilization treatment or the like, and maintaining excellent hot water-resistant adhering property.Type: ApplicationFiled: May 18, 2016Publication date: October 11, 2018Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Yuji FUNAGI, Tomohiro MIYAI, Arata SAKURAGI
-
Publication number: 20180179635Abstract: A surface-treated aluminum plate obtained by forming, on at least one surface of an aluminum plate, a conversion-coated layer that contains a polyester resin and a zirconium compound or a titanium compound. The surface-treated aluminum plate excellently adheres to an organic resin coating and can be used as a material for producing cans featuring excellent corrosion resistance and shock resistance.Type: ApplicationFiled: February 26, 2018Publication date: June 28, 2018Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Tomohiro MIYAI, Takuya KASHIWAKURA, Yuji FUNAGI
-
Publication number: 20180087159Abstract: An organic resin-covered surface-treated metal sheet having formed on at least one surface of a metal sheet a surface-treatment coating and an organic resin film on the surface-treatment coating. The surface-treatment coating contains a poly-carboxylic acid type polymer and a polyvalent metal compound. The surface-treatment coating measured for its infrared-ray absorption spectra has a peak height ratio (?/?) of a maximum absorption peak height (?) in a wave number range of 1660 to 1760 cm?1 and a maximum absorption peak height (?) in a wave number range of 1490 to 1659 cm?1 of from 0.05 to 2.35.Type: ApplicationFiled: March 28, 2016Publication date: March 29, 2018Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Yuji FUNAGI, Tomohiro MIYAI, Arata SAKURAGI
-
Publication number: 20170225830Abstract: A coated metal sheet further covered with an organic resin obtained by forming, on at least one surface of a metal sheet, a coating film and further forming thereon an organic resin layer. The coating film contains a polyester resin having a glass transition temperature of 20 to 55° C., a phenol resin and an acid catalyst, in order to be able to provide the coated metal sheet further covered with the organic resin that is suited for producing cans and can lids having excellent applicability for producing cans and excellent dent resistance.Type: ApplicationFiled: October 5, 2015Publication date: August 10, 2017Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Yuji FUNAGI, Tomohiro MIYAI
-
Publication number: 20170210940Abstract: A chromium-free coated metal sheet obtained by forming a coating on at least one surface of a metal sheet, and a coated metal sheet further covered with an organic resin film obtained by forming an organic resin film on the coating of the coated metal sheet, the coating thereof containing a main resin, a phenol resin as a curing agent and a tannic acid as an additive. The metal sheets have excellent dent resistance to cope with even acidic beverages, have excellent applicability for producing cans, and are capable of providing cans and can lids that have excellent hot water-resistant adhering property without permitting the organic resin film to peel even if exposed to a high temperature and highly humid environment such as of the step of sterilization and, besides, offering advantage in productivity and economy.Type: ApplicationFiled: October 5, 2015Publication date: July 27, 2017Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Takuya KASHIWAKURA, Yuji FUNAGI, Tomohiro MIYAI
-
Publication number: 20150056390Abstract: A surface-treated aluminum plate obtained by forming, on at least one surface of an aluminum plate, a conversion-coated layer that contains a polyester resin and a zirconium compound or a titanium compound. The surface-treated aluminum plate excellently adheres to an organic resin coating and can be used as a material for producing cans featuring excellent corrosion resistance and shock resistance.Type: ApplicationFiled: March 29, 2013Publication date: February 26, 2015Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Tomohiro Miyai, Takuya Kashiwakura, Yuji Funagi