Patents by Inventor Atsuhiro Tokita
Atsuhiro Tokita 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: 11897980Abstract: Provided are: a laminated resin sheet for molding, which is less likely to cause an abnormal appearance during molding, and has an anti-glare layer but has excellent transparency; and a molded article using the same. This laminated resin sheet for molding comprises: a high-hardness resin layer containing a high-hardness resin; a base material layer which contains a polycarbonate resin (a1) and is disposed on one surface side of the high-hardness resin layer; and a hard coat anti-glare layer disposed on the other surface side of the high-hardness resin layer, wherein the glass transition point (Tg1) of the high-hardness resin and the glass transition point (Tg2) of the polycarbonate resin (a1) satisfy the following relationship, and the maximum valley depth (Rv) of the recesses and protrusions of the hard coat anti-glare layer is at most 0.9 ?m ?10° C.?(Tg1?Tg2)?40° C.Type: GrantFiled: February 3, 2021Date of Patent: February 13, 2024Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Masato Takasaki, Atsuhiro Tokita
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Publication number: 20230241874Abstract: A resin sheet for molding includes a substrate layer that contains polycarbonate resin (a1), a high-hardness resin layer that contains high-hardness resin and that is provided on at least one surface of the substrate layer, a hard coat layer or a hard coat antiglare layer that is provided on at least one surface of the high-hardness resin layer, and a wet antireflection layer that is laminated on a surface of the hard coat layer or the hard coat antiglare layer on the side opposite from the high-hardness resin layer, wherein the glass transition temperatures of the polycarbonate resin (a1) and the high-hardness resin satisfy the following relationship: ?10° C.?(glass transition temperature of high-hardness resin)?(glass transition temperature of polycarbonate resin (a1))?40° C.Type: ApplicationFiled: May 27, 2021Publication date: August 3, 2023Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro TOKITA, Kenta NONAKA, Masato TAKASAKI
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Patent number: 11701803Abstract: A method for producing a press-molded body of a polycarbonate sheet including resin layers (A) and (B) respectively containing a polycarbonate resin, and a high hardness resin (B) and a hard coat layer (C) sequentially stacked on at least one surface of the resin layer (A). The method includes pre-heating the polycarbonate sheet to a temperature between a glass transition point of the resin layer (A)?45° C. or higher and the glass transition point or lower; locating the pre-heated polycarbonate sheet between an upper and lower die of a mold, wherein a time period after the pre-heating is finished until the polycarbonate sheet is located between the upper and lower die of the mold is 90 seconds or shorter; and clamping the mold to press the upper and lower die to obtain the press-molded body of the polycarbonate sheet.Type: GrantFiled: October 3, 2019Date of Patent: July 18, 2023Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro Tokita, Masato Takasaki
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Publication number: 20230145247Abstract: Provided are: a laminated resin sheet for molding, which is less likely to cause an abnormal appearance during molding, and has an anti-glare layer but has excellent transparency; and a molded article using the same. This laminated resin sheet for molding comprises: a high-hardness resin layer containing a high-hardness resin; a base material layer which contains a polycarbonate resin (a1) and is disposed on one surface side of the high-hardness resin layer; and a hard coat anti-glare layer disposed on the other surface side of the high-hardness resin layer, wherein the glass transition point (Tg1) of the high-hardness resin and the glass transition point (Tg2) of the polycarbonate resin (a1) satisfy the following relationship, and the maximum valley depth (Rv) of the recesses and protrusions of the hard coat anti-glare layer is at most 0.9 ?m. ?10° C.?(Tg1?Tg2)?40° C.Type: ApplicationFiled: February 3, 2021Publication date: May 11, 2023Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Masato TAKASAKI, Atsuhiro TOKITA
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Publication number: 20220379590Abstract: Provided is a resin sheet for molding that has a high-hardness resin layer that includes a high-hardness resin on at least one surface of a base material layer that includes a polycarbonate resin, the high-hardness resin layer having a hardcoat layer or a hardcoat anti-glare layer layered on at least one side thereof. The glass transition points of the polycarbonate resin and the high-hardness resin satisfy the relationship: ?10° C.?(glass transition point of high-hardness resin)?(glass transition point of polycarbonate resin)?40° C. The in-plane retardation of the resin sheet as measured at a wavelength of 543 nm is at least 4,000 nm. A resin film that has an in-plane retardation of no more than 50 nm as measured at a wavelength of 543 nm is stuck to one side of the resin sheet by means of an adhesive layer that includes an adhesive.Type: ApplicationFiled: August 4, 2020Publication date: December 1, 2022Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro TOKITA, Kenta NONAKA, Masato TAKASAKI
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Patent number: 11421093Abstract: Provided is a two-stage curable laminate characterized in that a layer containing a high-hardness resin (B) is disposed on at least one surface of a resin layer (A) containing a polycarbonate resin (a1), a coating layer (Z) is disposed on the layer containing the high-hardness resin (B), and conditions (i) to (iii) above are satisfied.Type: GrantFiled: August 17, 2017Date of Patent: August 23, 2022Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro Tokita, Shigeki Tahara, Masato Takasaki, Kishin Ozawa
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Patent number: 11370206Abstract: According to an embodiment, provided is a molding resin sheet including: a base material layer containing a polycarbonate resin (a1); a high-hardness resin layer containing a high-hardness resin; and a hard coat layer, wherein the high-hardness resin layer is located between the base material layer and the hard coat layer, the high-hardness resin has a pencil hardness of HB or more, and the glass transition points of the polycarbonate resin (a1) and the high-hardness resin satisfy the following relationship: ?10° C.?(the glass transition point of the high-hardness resin)?(the glass transition point of the polycarbonate resin (a1))?40° C.Type: GrantFiled: August 27, 2018Date of Patent: June 28, 2022Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro Tokita, Masaki Hirabayashi, Masato Takasaki
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Publication number: 20220056224Abstract: Provided is a resin sheet for molding, which is provided with a base material layer that contains a polycarbonate resin (a1), a high hardness resin layer that contains a high hardness resin, and a hard coat anti-glare layer, and which is configured such that: the high hardness resin layer is arranged between the base material layer and the hard coat anti-glare layer; the glass transition points of the polycarbonate resin (a1) and the high hardness resin satisfy the relational expression ?10° C.?(glass transition point of high hardness resin)?(glass transition point of polycarbonate resin (a1))?40° C.; and two protective films are superposed and bonded onto both surfaces of the resin sheet.Type: ApplicationFiled: February 25, 2020Publication date: February 24, 2022Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro TOKITA, Kenta NONAKA, Masato TAKASAKI
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Patent number: 11214681Abstract: The present invention provides a polycarbonate resin composition containing a polycarbonate resin (A), a flame retardant (B), and a fluoropolymer (C), said polycarbonate resin composition being characterized in that the fluidity of the fluoropolymer (C), as measured using a Koka flow tester (under the conditions of a measurement temperature of 400° C., a measurement load of 0.98 MPa, and a die hole diameter of 2.1 mm), is 0.1×10?3 cm3/sec or greater. The present invention also provides a sheet and a film.Type: GrantFiled: August 29, 2016Date of Patent: January 4, 2022Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Haruhiko Kurokawa, Atsuhiro Tokita, Junya Asano
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Publication number: 20210339436Abstract: A method for producing a press-molded body of a polycarbonate sheet including resin layers (A) and (B) respectively containing a polycarbonate resin, and a high hardness resin (B) and a hard coat layer (C) sequentially stacked on at least one surface of the resin layer (A). The method includes pre-heating the polycarbonate sheet to a temperature between a glass transition point of the resin layer (A)?45° C. or higher and the glass transition point or lower; locating the pre-heated polycarbonate sheet between an upper and lower die of a mold, wherein a time period after the pre-heating is finished until the polycarbonate sheet is located between the upper and lower die of the mold is 90 seconds or shorter; and clamping the mold to press the upper and lower die to obtain the press-molded body of the polycarbonate sheet.Type: ApplicationFiled: October 3, 2019Publication date: November 4, 2021Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro TOKITA, Masato TAKASAKI
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Publication number: 20200247098Abstract: According to an embodiment, provided is a molding resin sheet including: a base material layer containing a polycarbonate resin (a1); a high-hardness resin layer containing a high-hardness resin; and a hard coat layer, wherein the high-hardness resin layer is located between the base material layer and the hard coat layer, the high-hardness resin has a pencil hardness of HB or more, and the glass transition points of the polycarbonate resin (a1) and the high-hardness resin satisfy the following relationship: ?10° C.?(the glass transition point of the high-hardness resin)?(the glass transition point of the polycarbonate resin (a1))?40° C.Type: ApplicationFiled: August 27, 2018Publication date: August 6, 2020Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro TOKITA, Masaki HIRABAYASHI, Masato TAKASAKI
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Patent number: 10696818Abstract: The present invention provides a polycarbonate resin composition characterized by containing 73 to 94.5 mass % of a polycarbonate resin (A), 5 to 25 mass % of a phosphorus-based flame retardant (B), and 0.1 to 2 mass % of a fluoropolymer (C), and by having a flow value of 1×0.01 to 10×0.01 cm3/sec at 280° C. The present invention also provides a sheet and a film using the polycarbonate resin composition.Type: GrantFiled: August 29, 2016Date of Patent: June 30, 2020Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Haruhiko Kurokawa, Atsuhiro Tokita, Hiroki Ishii
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Patent number: 10508191Abstract: The present invention provides: a polycarbonate resin composition which contains 18-75% by mass of (A) a polycarbonate resin having a viscosity average molecular weight of 28,000-60,000, 5-30% by mass of (B) a phosphorus flame retardant, 18-50% by mass of (C) a fibrous or plate-like inorganic filler, and 0.1-2% by mass of (D) a fluoropolymer; and a sheet and a film, each of which uses this polycarbonate resin composition.Type: GrantFiled: August 29, 2016Date of Patent: December 17, 2019Assignees: MITSUBUSHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Hiroki Ishii, Haruhiko Kurokawa, Atsuhiro Tokita
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Publication number: 20190194410Abstract: Provided is a two-stage curable laminate characterized in that a layer containing a high-hardness resin (B) is disposed on at least one surface of a resin layer (A) containing a polycarbonate resin (a1), a coating layer (Z) is disposed on the layer containing the high-hardness resin (B), and conditions (i) to (iii) above are satisfied.Type: ApplicationFiled: August 17, 2017Publication date: June 27, 2019Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Atsuhiro TOKITA, Shigeki TAHARA, Masato TAKASAKI, Kishin OZAWA
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Publication number: 20180215901Abstract: The present invention provides a polycarbonate resin composition characterized by containing 73 to 94.5 mass % of a polycarbonate resin (A), 5 to 25 mass % of a phosphorus-based flame retardant (B), and 0.1 to 2 mass % of a fluoropolymer (C), and by having a flow value of 1×0.01 to 10×0.01 cm3/sec at 280° C. The present invention also provides a sheet and a film using the polycarbonate resin composition.Type: ApplicationFiled: August 29, 2016Publication date: August 2, 2018Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Haruhiko KUROKAWA, Atsuhiro TOKITA, Hiroki ISHII
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Patent number: 10035899Abstract: According to an embodiment, provided is a polycarbonate resin composition containing a polycarbonate resin, wherein a molded product of the polycarbonate resin composition has an integrated value of an amount of chemiluminescence derived from organic peroxide of 4,000 to 12,000 counts per mg of the molded product, and the integrated value of the amount of chemiluminescence is a value obtained by integrating the amount of chemiluminescence at a wavelength of 405 to 650 nm that is measured during 480 seconds in which under a nitrogen atmosphere the temperature is raised from 100° C. to 350° C. at a rate of 50° C./minute and thereafter is maintained at 350° C. for 180 seconds.Type: GrantFiled: April 2, 2015Date of Patent: July 31, 2018Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventor: Atsuhiro Tokita
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Patent number: 10035289Abstract: The manufacturing apparatus of the present invention comprises a die for extruding a resin plate and a first roller and a second roller for molding the resin plate. The manufacturing apparatus further comprises: an inner deckel for dividing the resin plate and pre-forming a thick section; and a main molding section provided on the first roller and/or the second roller for molding a non-uniform thickness section from the thick section.Type: GrantFiled: March 19, 2015Date of Patent: July 31, 2018Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventor: Atsuhiro Tokita
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Publication number: 20180208763Abstract: The present invention provides a polycarbonate resin composition containing a polycarbonate resin (A), a flame retardant (B), and a fluoropolymer (C), said polycarbonate resin composition being characterized in that the fluidity of the fluoropolymer (C), as measured using a Koka flow tester (under the conditions of a measurement temperature of 400° C., a measurement load of 0.98 MPa, and a die hole diameter of 2.1 mm), is 0.1×10?3 cm3/sec or greater. The present invention also provides a sheet and a film.Type: ApplicationFiled: August 29, 2016Publication date: July 26, 2018Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Haruhiko KUROKAWA, Atsuhiro TOKITA, Junya ASANO
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Publication number: 20180201754Abstract: The present invention provides: a polycarbonate resin composition which contains 18-75% by mass of (A) a polycarbonate resin having a viscosity average molecular weight of 28,000-60,000, 5-30% by mass of (B) a phosphorus flame retardant, 18-50% by mass of (C) a fibrous or plate-like inorganic filler, and 0.1-2% by mass of (D) a fluoropolymer; and a sheet and a film, each of which uses this polycarbonate resin composition.Type: ApplicationFiled: August 29, 2016Publication date: July 19, 2018Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Hiroki ISHII, Haruhiko KUROKAWA, Atsuhiro TOKITA
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Publication number: 20170198118Abstract: According to an embodiment, provided is a polycarbonate resin composition containing a polycarbonate resin, wherein a molded product of the polycarbonate resin composition has an integrated value of an amount of chemiluminescence derived from organic peroxide of 4,000 to 12,000 counts per mg of the molded product, and the integrated value of the amount of chemiluminescence is a value obtained by integrating the amount of chemiluminescence at a wavelength of 405 to 650 nm that is measured during 480 seconds in which under a nitrogen atmosphere the temperature is raised from 100° C. to 350° C. at a rate of 50° C./minute and thereafter is maintained at 350° C. for 180 seconds.Type: ApplicationFiled: April 2, 2015Publication date: July 13, 2017Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventor: Atsuhiro TOKITA