Patents by Inventor Masanori Nakajima
Masanori Nakajima 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: 11946123Abstract: Provided is a method of easily producing a non-oriented electrical steel sheet that contains substantially no Al and contains large amounts of Si and Mn and has low iron loss, comprising hot rolling a slab having a specified chemical composition to obtain a hot-rolled sheet; coiling the hot-rolled sheet; cold rolling the hot-rolled sheet once or twice with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet; and subjecting the cold-rolled sheet to final annealing, wherein the hot-rolled sheet after the hot rolling is cooled at an average cooling rate from 800° C. to 650° C. of 30° C./s or more, and thereafter the coiling is performed at 650° C. or less.Type: GrantFiled: April 7, 2023Date of Patent: April 2, 2024Assignee: JFE STEEL CORPORATIONInventors: Masanori Uesaka, Yoshiaki Zaizen, Tomoyuki Okubo, Hiroaki Nakajima, Yoshihiko Oda
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Patent number: 10577470Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and surface layers 6a and 6b provided on the surfaces of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles 4 having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles 4 include the polyamide 1010 resin particle.Type: GrantFiled: March 24, 2014Date of Patent: March 3, 2020Assignees: SUBARU CORPORATION, JXTG NIPPON OIL & ENERGY CORPORATIONInventors: Yoshihiro Fukuda, Takayuki Matsumoto, Masaki Minami, Naoyuki Sekine, Masanori Nakajima
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Patent number: 10328615Abstract: According to one implementation, a molding equipment of a composite material includes a vessel, a decompression system and a heating medium supply system. The vessel houses a molding target sealed by a sealing object. The decompression system performs bending forming of the molding target and pressurization on the molding target after the bending forming by decompressing a region surrounded by the sealing object in the vessel. The heating medium supply system supplies a heating medium into the vessel. The heating medium is supplied for the bending forming, and heating and curing of the molding target under the pressurization.Type: GrantFiled: February 25, 2016Date of Patent: June 25, 2019Assignees: SUBARU CORPORATION, KABUSHIKI KAISHA ASHIDA SEISAKUSHOInventors: Yumi Ito, Masanori Nakajima, Takeshi Ashida
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Patent number: 10316158Abstract: A production method for a fiber-reinforced composite material comprises: a step of stacking a prepreg plurally to obtain a prepreg-stacked body; and a step of heating the prepreg-stacked body to cure a resin, wherein the prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on at least one surface of the reinforcing fiber layer and containing (A) to (C) components, and (D) polyamide resin particles having an average particle size of 5 to 50 ?m.Type: GrantFiled: October 28, 2014Date of Patent: June 11, 2019Assignees: JXTG NIPPON OIL & ENERGY CORPORATION, SUBARU CORPORATIONInventors: Masaki Minami, Takayuki Matsumoto, Yoshihiro Fukuda, Naoyuki Sekine, Masanori Nakajima
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Patent number: 10081157Abstract: A fiber-reinforced composite material is provided which is capable of achieving CAI, ILSS, and interlaminar fracture toughness concurrently at high levels, in particular, capable of achieving high CAI. The composite material is composed of a laminated body including a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, wherein the resin layer is a layer wherein a cured product of a compound having in its molecule a benzoxazine ring of formula (1) and epoxy resin is impregnated with at least polyamide 12 powder: (R1: C1-C12 chain alkyl group or the like; H is bonded to at least one of the carbon atoms of the aromatic ring at ortho- or para-position with respect to C to which the oxygen atom is bonded).Type: GrantFiled: February 12, 2013Date of Patent: September 25, 2018Assignees: JX NIPPON OIL & ENERGY CORPORATION, SUBARU CORPORATIONInventors: Yoshihiro Fukuda, Takayuki Matsumoto, Masaki Minami, Naoyuki Sekine, Masanori Nakajima
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Patent number: 9745471Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers of the reinforcing fibers 1 is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer 6a or 6b provided on at least one surface of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles 4 having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles 4 include a particle made of a polyamide 11.Type: GrantFiled: March 24, 2014Date of Patent: August 29, 2017Assignees: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Yoshihiro Fukuda, Takayuki Matsumoto, Masaki Minami, Naoyuki Sekine, Masanori Nakajima
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Publication number: 20160297942Abstract: A production method for a fiber-reinforced composite material comprises: a step of stacking a prepreg plurally to obtain a prepreg-stacked body; and a step of heating the prepreg-stacked body to cure a resin, wherein the prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on at least one surface of the reinforcing fiber layer and containing (A) to (C) components, and (D) polyamide resin particles having an average particle size of 5 to 50 ?m.Type: ApplicationFiled: October 28, 2014Publication date: October 13, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaki MINAMI, Takayuki MATSUMOTO, Yoshihiro FUKUDA, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160289405Abstract: The prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on a surface of the reinforcing fiber layer and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles include a polyamide 12 resin particle and a polyamide 1010 resin particle.Type: ApplicationFiled: October 28, 2014Publication date: October 6, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaki MINAMI, Takayuki MATSUMOTO, Yoshihiro FUKUDA, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160289403Abstract: The prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on a surface of the reinforcing fiber layer and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles include a polyamide resin particle made of a copolymer in which caprolactam and laurolactam are copolymerized at a molar ratio of 1:9 to 3:7 and a polyamide 1010 resin particle.Type: ApplicationFiled: October 28, 2014Publication date: October 6, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaki MINAMI, Takayuki MATSUMOTO, Yoshihiro FUKUDA, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160289404Abstract: The prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on a surface of the reinforcing fiber layer and containing (A) to (C) components, and (D) polyamide resin particles having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles include polyamide resin particles made of copolymers in which caprolactam and laurolactam are copolymerized at a molar ratio of 1:9 to 3:7 and at a molar ratio of 9:1 to 7:3, respectively.Type: ApplicationFiled: October 28, 2014Publication date: October 6, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaki MINAMI, Takayuki MATSUMOTO, Yoshihiro FUKUDA, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160280872Abstract: The prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on a surface of the reinforcing fiber layer and containing the (A) to (C) components, and (D) polyamide resin particles having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles include a polyamide 12 resin particle and a polyamide resin particle made of a copolymer in which caprolactam and laurolactam are copolymerized at a molar ratio of 9:1 to 7:3.Type: ApplicationFiled: October 28, 2014Publication date: September 29, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaki MINAMI, Takayuki MATSUMOTO, Yoshihiro FUKUDA, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160263784Abstract: According to one implementation, a molding equipment of a composite material includes a vessel, a decompression system and a heating medium supply system. The vessel houses a molding target sealed by a sealing object. The decompression system performs bending forming of the molding target and pressurization on the molding target after the bending forming by decompressing a region surrounded by the sealing object in the vessel. The heating medium supply system supplies a heating medium into the vessel. The heating medium is supplied for the bending forming, and heating and curing of the molding target under the pressurization.Type: ApplicationFiled: February 25, 2016Publication date: September 15, 2016Inventors: Yumi ITOU, Masanori NAKAJIMA, Takeshi ASHIDA
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Publication number: 20160083541Abstract: A production method for a fiber-reinforced composite material comprises: a first step of stacking a prepreg including: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and a surface layer provided on at least one surface of the reinforcing fiber layer and containing polyamide resin particles having an average particle size of 5 to 50 ?m and a melting point of 175 to 210° C. plurally and performing heating at a temperature of 120° C. or more and less than M1° C. when the melting point of the polyamide resin particles measured in the composition forming the surface layer is denoted by M1° C.; and a second step of performing heating at a temperature of M1° C. or more after the first step to cure the resin.Type: ApplicationFiled: March 24, 2014Publication date: March 24, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Yoshihiro FUKUDA, Takayuki MATSUMOTO, Masaki MINAMI, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160083582Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers of the reinforcing fibers 1 is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer 6a or 6b provided on at least one surface of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles 4 having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles 4 include a particle made of a polyamide 11.Type: ApplicationFiled: March 24, 2014Publication date: March 24, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Yoshihiro FUKUDA, Takayuki MATSUMOTO, Masaki MINAMI, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160046776Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent represented by the following formula (C-1); and surface layers 6a and 6b provided on the surfaces of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent represented by the following formula (C-1), and (D) polyamide resin particles 4 having an average particle size of 5 to 50 wherein the polyamide resin particles 4 include a polyamide 12 resin particle or a polyamide 1010 resin particle.Type: ApplicationFiled: March 24, 2014Publication date: February 18, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Yoshihiro FUKUDA, Takayuki MATSUMOTO, Masaki MINAMI, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160039984Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and surface layers 6a and 6b provided on the surfaces of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles 4 having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles 4 include the polyamide 1010 resin particle.Type: ApplicationFiled: March 24, 2014Publication date: February 11, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHA, JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Yoshihiro FUKUDA, Takayuki MATSUMOTO, Masaki MINAMI, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20160032065Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers thereof is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups; and surface layers 6a and 6b provided on the surfaces of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups, and (D) polyamide resin particles 4 having an average particle size of 5 to 50 wherein the polyamide resin particles 4 include a particle made of a copolymer in which caprolactam and laurolactam are copolymerized at a molar ratio of 9:1 to 7:3 and having a melting point of 180° C. or more.Type: ApplicationFiled: March 24, 2014Publication date: February 4, 2016Applicants: JX NIPPON OIL & ENERGY CORPORATION, FUJI JUKOGYO KABUSHIKI KAISHAInventors: Yoshihiro FUKUDA, Takayuki MATSUMOTO, Masaki MINAMI, Naoyuki SEKINE, Masanori NAKAJIMA
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Publication number: 20150251394Abstract: A fiber-reinforced composite material is provided which is capable of achieving CAI, ILSS, and interlaminar fracture toughness concurrently at high levels, in particular, capable of achieving high CAI. The composite material is composed of a laminated body including a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, wherein the resin layer is a layer wherein a cured product of a compound having in its molecule a benzoxazine ring of formula (1) and epoxy resin is impregnated with at least polyamide 12 powder: (R1: C1-C12 chain alkyl group or the like; H is bonded to at least one of the carbon atoms of the aromatic ring at ortho- or para-position with respect to C to which the oxygen atom is bonded).Type: ApplicationFiled: February 12, 2013Publication date: September 10, 2015Applicants: FUJI JUKOGYO KABUSHIKI KAISHA, JX NIPPON OIL & ENERGY CORPORATIONInventors: Yoshihiro Fukuda, Takayuki Matsumoto, Masaki Minami, Naoyuki Sekine, Masanori Nakajima
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Publication number: 20150132553Abstract: Fiber-reinforced composite material is provided which is capable of achieving high levels of CAI, ILSS, and interlaminar fracture toughness concurrently, in particular, capable of achieving high ILSS at high CAI, temperature, and humidity. The fiber-reinforced composite material is composed of a laminated body including a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, wherein the resin layer is a layer wherein at least polyethersulphone particles are impregnated with a cured product of epoxy resin and a compound having in its molecule a benzoxazine ring represented by formula (1): wherein R1 has the same meaning as defined in the specification. The composite material is useful in automobile-, railroad-vehicle-, aircraft-, and ship-related applications, building components, such as windmills, and other general industry-related applications.Type: ApplicationFiled: June 25, 2013Publication date: May 14, 2015Applicants: FUJI JUKOGYO KABUSHIKI KAISHA, JX NIPPON OIL & ENERGY CORPORATIONInventors: Yoshihiro Fukuda, Takayuki Matsumoto, Masaki Minami, Naoyuki Sekine, Masanori Nakajima
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Publication number: 20150056882Abstract: A fiber-reinforced composite material is provided which is capable of achieving CAI, ILSS, and interlaminar fracture toughness concurrently at high levels, in particular, capable of achieving high CAI. The composite material is composed of a laminated body including a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, wherein the resin layer is a layer wherein a cured product of a compound having in its molecule a benzoxazine ring of formula (1) and epoxy resin is impregnated with at least polyamide 12 powder: (R1: C1-C12 chain alkyl group or the like; H is bonded to at least one of the carbon atoms of the aromatic ring at ortho- or para-position with respect to C to which the oxygen atom is bonded).Type: ApplicationFiled: February 12, 2013Publication date: February 26, 2015Applicants: FUJI JUKOGYO KABUSHIKI KAISHA, JX NIPPON OIL & ENERGY CORPORATIONInventors: Yoshihiro Fukuda, Takayuki Matsumoto, Masaki Minami, Naoyuki Sekine, Masanori Nakajima