Patents by Inventor Takanori Isozaki
Takanori Isozaki 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: 9611367Abstract: [Problem] To provide a film that has excellent water solubility which changes little over time even when the film touches a chemical, a package and a liquid transfer printing film each using the film and a liquid transfer printing method using the liquid transfer printing film. [Means for Resolution] A film containing a hydroxymethyl group-containing vinyl alcohol-based polymer containing a vinyl alcohol unit and a unit structure represented by the following formula (1), a package and a liquid transfer printing film each using the film and a liquid transfer printing method using the liquid transfer printing film.Type: GrantFiled: August 5, 2014Date of Patent: April 4, 2017Assignee: KURARAY CO., LTD.Inventors: Masahiro Takafuji, Takanori Isozaki
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Publication number: 20160194465Abstract: [Problem] To provide a film that has excellent water solubility which changes little over time even when the film touches a chemical, a package and a liquid transfer printing film each using the film and a liquid transfer printing method using the liquid transfer printing film. [Means for Resolution] A film containing a hydroxymethyl group-containing vinyl alcohol-based polymer containing a vinyl alcohol unit and a unit structure represented by the following formula (1), a package and a liquid transfer printing film each using the film and a liquid transfer printing method using the liquid transfer printing film.Type: ApplicationFiled: August 5, 2014Publication date: July 7, 2016Applicant: KURARAY CO., LTD.Inventors: Masahiro TAKAFUJI, Takanori ISOZAKI
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Patent number: 8927061Abstract: In a method for hydraulic transfer printing, comprising floating a transfer sheet comprising a polyvinyl alcohol polymer film and a print layer formed thereon on a surface of an aqueous solution while directing the print layer upward, and then pressing an article against the surface of the aqueous solution to transfer the print layer to the article, wherein the surface tension of the aqueous solution is adjust to 45 mN/m or less and the extension ratio of the transfer sheet is adjusted to 1.30 or less during the transfer. This makes it possible to transfer a high-definition print pattern to the surface of an article having irregularities or a curved surface.Type: GrantFiled: November 15, 2011Date of Patent: January 6, 2015Assignee: Kuraray Co., Ltd.Inventors: Shintaro Hikasa, Takanori Isozaki, Toru Sanefuji, Nobuo Tanaka
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Publication number: 20140150338Abstract: [Task] The objects of the present invention are to provide: a polyvinyl alcohol (PVA) film for plant cultivation which is capable of suppressing root penetration while exhibiting excellent nutrient permeability; a method for producing the same; and a method for plant cultivation using the same. [Means to Achieve the Task] The present invention is directed to a PVA film for plant cultivation, wherein a thicknesswise-directional average value of birefringence in a machine direction of the film is from 4.0×10?3 to 12.0×10?3 and a swelling degree of the film is from 150 to 180%; a method for producing a PVA film for plant cultivation, which comprises a step in which a PVA film having a moisture content of from 5 to 20% by mass is stretched in the ratio of from 1.3 to 1.7 times and a step in which the stretched film is heat-treated at a temperature in the range of from 130 to 170° C.Type: ApplicationFiled: September 9, 2011Publication date: June 5, 2014Inventors: Masahiro Takafuji, Takanori Isozaki
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Publication number: 20120055364Abstract: In a method for hydraulic transfer printing, comprising floating a transfer sheet comprising a polyvinyl alcohol polymer film and a print layer formed thereon on a surface of an aqueous solution while directing the print layer upward, and then pressing an article against the surface of the aqueous solution to transfer the print layer to the article, wherein the surface tension of the aqueous solution is adjust to 45 mN/m or less and the extension ratio of the transfer sheet is adjusted to 1.30 or less during the transfer. This makes it possible to transfer a high-definition print pattern to the surface of an article having irregularities or a curved surface.Type: ApplicationFiled: November 15, 2011Publication date: March 8, 2012Applicant: KURARAY CO., LTD.Inventors: Shintaro HIKASA, Takanori Isozaki, Toru Sanefuji, Nobuo Tanaka
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Patent number: 7632430Abstract: The invention provides a continuous method for producing polarizing films that includes a step of monoaxially stretching a polyvinyl alcohol film having a width of at least 2 m in an aqueous boric acid solution, wherein the polyvinyl alcohol film is stretched on the condition that it satisfies the following formulae (1) and (2): A?5 (m)??(1) A/B?0.5 (min) (2) wherein A indicates the stretching distance (m); and B indicates the stretched film speed (m/min). The method gives wide polarizing films of wide and good polarization performance, and the polarizing films thus produced are useful as the material for polarizers that may be in large-size liquid-crystal displays.Type: GrantFiled: October 24, 2003Date of Patent: December 15, 2009Assignee: Kuraray Co., Ltd.Inventors: Takanori Isozaki, Tetsushi Hayashi, Hajime Nishiuma
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Patent number: 7511093Abstract: A polyvinyl alcohol polymer film includes a polyvinyl alcohol polymer and a plasticizer selected from the group consisting of ethylene glycol, glycerin, propylene glycol, diethylene glycol, diglycerin, triethylene glycol, tetraethylene glycol, and trimethylolpropane. The amount of the polyvinyl alcohol polymer eluted when a 10 cm square of the polyvinyl alcohol polymer film is left in 1 liter of water of 50° C. for 4 hours is from 1 to 100 ppm. The film has only a small number of defects and is useful as raw material for producing a polarization film.Type: GrantFiled: April 26, 2006Date of Patent: March 31, 2009Assignee: Kuraray Co., Ltd.Inventors: Shigeyuki Harita, Takanori Isozaki, Naoki Fujiwara
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Publication number: 20070087171Abstract: In a method for hydraulic transfer printing, comprising floating a transfer sheet comprising a polyvinyl alcohol polymer film and a print layer formed thereon on a surface of an aqueous solution while directing the print layer upward, and then pressing an article against the surface of the aqueous solution to transfer the print layer to the article, wherein the surface tension of the aqueous solution is adjust to 45 mN/m or less and the extension ratio of the transfer sheet is adjusted to 1.30 or less during the transfer. This makes it possible to transfer a high-definition print pattern to the surface of an article having irregularities or a curved surface.Type: ApplicationFiled: October 21, 2004Publication date: April 19, 2007Applicant: Kuraray Co. Ltd.Inventors: Shintaro Hikasa, Takanori Isozaki, Toru Sanefuji, Nobuo Tanaka
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Patent number: 7183344Abstract: The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of ?-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.Type: GrantFiled: May 2, 2005Date of Patent: February 27, 2007Assignee: Kuraray Co., Ltd.Inventors: Tetsushi Hayashi, Takanori Isozaki, Naoki Fujiwara
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Publication number: 20060264564Abstract: A polyvinyl alcohol polymer film includes a polyvinyl alcohol polymer and a plasticizer selected from the group consisting of ethylene glycol, glycerin, propylene glycol, diethylene glycol, diglycerin, triethylene glycol, tetraethylene glycol, and trimethylolpropane. The amount of the polyvinyl alcohol polymer eluted when a 10 cm square of the polyvinyl alcohol polymer film is left in 1 liter of water of 50° C. for 4 hours is from 1 to 100 ppm. The film has only a small number of defects and is useful as raw material for producing a polarization film.Type: ApplicationFiled: April 26, 2006Publication date: November 23, 2006Applicant: KURARAY CO. LTD.Inventors: Shigeyuki Harita, Takanori Isozaki, Naoki Fujiwara
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Patent number: 7015266Abstract: The invention is a polyvinyl alcohol film having an YI value of at most 20, which is formed of a modified polyvinyl alcohol having a degree of polymerization of from 1500 to 5000, an ethylene unit content of from 1 to 4 mol % and a 1,2-glycol bond content of at most 1.4 mol %. The polyvinyl alcohol film gives polarizing films that contain no impurities and have good polarization performance, durability and hue stability.Type: GrantFiled: March 13, 2003Date of Patent: March 21, 2006Assignee: Kuraray Co., Ltd.Inventors: Takanori Isozaki, Tetsushi Hayashi, Toshio Nakai, Naoki Fujiwara
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Patent number: 6982297Abstract: The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of ?-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.Type: GrantFiled: December 12, 2002Date of Patent: January 3, 2006Assignee: Kuraray Co., Ltd.Inventors: Tetsushi Hayashi, Takanori Isozaki, Naoki Fujiwara
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Patent number: 6956070Abstract: The present invention provides a water-soluble film which comprises a modified polyvinyl alcohol containing an N-vinylamide monomer unit in an amount of 1 to 10 mole percent, and a carboxyl group and a lactone group in a total amount of 0.020 to 4.0 mole percent in the molecule, and having a degree of polymerization of 300 to 3000, and a degree of hydrolysis of 75 to 99.5 mole percent. Further, the present invention provides a package obtained by packaging an acidic substance, a chlorine-containing compound, or the like using the water-soluble film.Type: GrantFiled: April 16, 2002Date of Patent: October 18, 2005Assignee: Kuraray Co., Ltd.Inventors: Naoki Fujiwara, Shintaro Hikasa, Takanori Isozaki
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Publication number: 20050186441Abstract: The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of ?-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.Type: ApplicationFiled: May 2, 2005Publication date: August 25, 2005Applicant: KURARAY CO., LTD.Inventors: Tetsushi Hayashi, Takanori Isozaki, Naoki Fujiwara
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Patent number: 6803411Abstract: Difference in retardation between two points separated by 1 cm along the TD direction of a polyvinyl alcohol polymer film 6 is 5 nm or less. The length of a surface for drying a polyvinyl alcohol polymer film 6 is 3 m to 200 m, and the water content of the polyvinyl alcohol polymer film 6 when peeled after passing through the drying surface is 50% by weight or less, in film formation.Type: GrantFiled: May 1, 2001Date of Patent: October 12, 2004Assignee: Kuraray Co., Ltd.Inventors: Shigeyuki Harita, Takanori Isozaki
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Publication number: 20040089960Abstract: The invention provides a continuous method for producing polarizing films that includes a step of monoaxially stretching a polyvinyl alcohol film having a width of at least 2 m in an aqueous boric acid solution, wherein the polyvinyl alcohol film is stretched on the condition that it satisfies the following formulae (1) and (2):Type: ApplicationFiled: October 24, 2003Publication date: May 13, 2004Applicant: Kuraray Co., Ltd.Inventors: Takanori Isozaki, Tetsushi Hayashi, Hajime Nishiuma
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Publication number: 20040080825Abstract: A polyvinyl alcohol polymer film includes a polyvinyl alcohol polymer and a plasticizer selected from the group consisting of ethylene glycol, glycerin, propylene glycol, diethylene glycol, diglycerin, triethylene glycol, tetraethylene glycol, and trimethylolpropane. The amount of the polyvinyl alcohol polymer eluted when a 10 cm square of the polyvinyl alcohol polymer film is left in 1 liter of water of 50° C. for 4 hours is from 1 to 100 ppm. The film has only a small number of defects and is useful as raw material for producing a polarization film.Type: ApplicationFiled: September 15, 2003Publication date: April 29, 2004Applicant: KURARAY CO. LTD.Inventors: Shigeyuki Harita, Takanori Isozaki, Naoki Fujiwara
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Publication number: 20030178608Abstract: The invention is a polyvinyl alcohol film having an YI value of at most 20, which is formed of a modified polyvinyl alcohol having a degree of polymerization of from 1500 to 5000, an ethylene unit content of from 1 to 4 mol % and a 1,2-glycol bond content of at most 1.4 mol %. The polyvinyl alcohol film gives polarizing films that contain no impurities and have good polarization performance, durability and hue stability.Type: ApplicationFiled: March 13, 2003Publication date: September 25, 2003Applicant: Kuraray Co., Ltd.Inventors: Takanori Isozaki, Tetsushi Hayashi, Toshio Nakai, Naoki Fujiwara
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Patent number: 6608121Abstract: A water-soluble resin composition is provided which comprises (i) 100 parts by weight of a polyvinyl alcohol polymer having a 1,2-glycol linkage content of at least 1.8 mole percent and a degree of hydrolysis of at least 90 mole percent, (ii) 1 to 50 parts by weight of a plasticizer and (iii) 5 to 50 parts by weight of a monosaccharide and/or a polysaccharide, optionally together with (iv) 1 to 20 parts by weight of an inorganic filler. Also provided is a water-soluble resin composition which comprise (i′) 100 parts by weight of a polyvinyl alcohol polymer having a 1,2-glycol linkage content of at least 1.8 mole percent and a degree of hydrolysis of 92 to 99 mole percent, (ii′) 1 to 50 parts by weight of a plasticizer and (iv′) 1 to 20 parts by weight of an inorganic filler, optionally together with (iii′) 5 to 50 parts by weight of a monosaccharide and/or polysaccharide. Further provided are water-soluble films produced by using those water-soluble resin compositions.Type: GrantFiled: July 20, 2001Date of Patent: August 19, 2003Assignee: Kuraray Co., Ltd.Inventors: Takanori Isozaki, Naoki Fujiwara, Kazuyuki Somemiya, Shintaro Hikasa
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Publication number: 20030114566Abstract: The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of &agr;-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.Type: ApplicationFiled: December 12, 2002Publication date: June 19, 2003Applicant: KURARAY CO. LTD,Inventors: Tetsushi Hayashi, Takanori Isozaki, Naoki Fujiwara