Patents Assigned to Kureha Chemical Industry Company, Limited
  • Patent number: 7237371
    Abstract: Deep draw packaging includes placing an object (C) in a concave container portion (1) formed by molding a film with small shrinkability (A), that is a film having a residual thermal shrinkage rate at 100° C. of 1 to 15 %. The film (A) is formed by stretching a film having deep draw moldability and then thermally relaxing the film. The film has a surface which is formed of a heat sealable material which becomes the inner wall of the container portion. The concave container portion (1) is thereafter transferred to to a vacuum packaging apparatus (5) where it is covered by a cover portion (2) formed of a film (B) which can be heat welded to the film (A). A side face portion (11) and a bottom face portion (12) of the concave container portion (1) are thermally shrunk into close contact with the object (C). Less curling is exhibited when an upper peripheral portion (13) of the concave container portion (1) is sealed with the film (B).
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: July 3, 2007
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Masataka Yamamoto, Takeo Omori
  • Patent number: 7235329
    Abstract: An electrode material comprising a powdery mixture of a metal material (particularly, an intermetallic compound) and a capacitive carbon material each capable of doping and dedoping lithium, and an optionally added fine electroconductive additive, and containing the metal material and the capacitive carbon material in amounts of 5-60 wt. % and 40-95 wt. %, respectively, is used as an active substance for an electrode, particularly a negative electrode, of a non-aqueous solvent secondary cell. As a result, there is provided a non-aqueous solvent secondary cell which has large charge-discharge capacities, a small irreversible capacity determined as a difference between the doping capacity and the de-doping capacity, and also excellent cycle characteristics.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: June 26, 2007
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Minoru Ishikawa, Kazuhiko Shimizu, Takashi Wakahoi, Shuji Morinishi, Naohiro Sonobe, Akio Hoshi
  • Patent number: 7208555
    Abstract: The present invention provides a polyvinylidene fluoride copolymer capable of forming a uniform film, a solution of the copolymer and a thin film comprising the polyvinylidene fluoride copolymer. The polyvinylidene fluoride copolymer of the present invention is characterized in that the ratio of the scattered-light intensity (I) for a 15% solution of the polyvinylidene fluoride copolymer in dimethylformamide solvent to the scattered-light intensity (I0) for dimethylformamide, (I/I0), is 10 or lower. The polyvinylidene fluoride copolymer solution comprises the polyvinylidene fluoride copolymer and an organic solvent capable of dissolving the copolymer.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: April 24, 2007
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Masahito Tada, Takumi Katsurao, Tsukasa Ikeda, Kazuyuki Suzuki
  • Publication number: 20070042194
    Abstract: An infrared-absorbing composition comprising a phosphoric acid ester compound including a phosphoric acid monoester represented by formula (1) below and a phosphoric acid diester represented by formula (2) below, and copper ion, wherein the ratio of the phosphoric acid monoester and the phosphoric acid diester is 30:70 to 74:26 as the molar ratio. wherein R1 and R2 each independently represent an ester bond-containing C4-18 group, a C4-18 alkyl group, a C4-18 alkenyl group or a C4-18 alkynyl group, with the proviso that the multiple R2 groups may be the same or different.
    Type: Application
    Filed: July 28, 2004
    Publication date: February 22, 2007
    Applicant: KUREHA CHEMICAL INDUSTRY COMPANY, LIMITED
    Inventors: Naoki Hayashi, Hiroki Katono, Rumi Ueda, Tomomi Ujiie, Yutaka Kobayashi
  • Publication number: 20060106264
    Abstract: In a process for preparing p-dichlorobenzene by nuclear chlorination of benzene and/or chlorobenzene as the starting material with chlorine molecules, chlorination is carried out using aluminum chloride in an amount of 0.1-3 millimols per mol of the starting material and phenothiazines such as 10H-phenothiazine-10-carboxylic acid phenyl ester in an amount of 0.1-0.9 mols per mol of aluminum chloride so as to be a chlorination degree in a range of 1.2-2.5, by which p-dichlorobenzene can be obtained in a high para-selectivity and a short reaction time.
    Type: Application
    Filed: September 3, 2003
    Publication date: May 18, 2006
    Applicant: KUREHA CHEMICAL INDUSTRY COMPANY LIMITED
    Inventors: Takashi Wakasugi, Tsugio Nonaka, Tadashi Miyakawa, Takanobu Hanabusa, Kazuhiko Sunagawa, Shigeru Mizusawa
  • Publication number: 20060047088
    Abstract: Disclosed herein are a high-molecular weight aliphatic polyester, whose molecular weight has been highly increased by a chain-lengthening reaction of a ring-opening (co)polymer of at least one cyclic ester selected from the group consisting of glycolide and lactide with an oxazoline compound, and a production process thereof. The molecular weight of the high-molecular weight aliphatic polyester is highly increased to the extent that a rate of increase in molecular weight represented by a ratio (Mw2/Mw1) of a weight average molecular weight (Mw2) of a ring-opening (co)polymer after the chain lengthening to a weight average molecular weight (Mw1) of the ring-opening (co)polymer before the chain lengthening amounts to at least 1.10.
    Type: Application
    Filed: October 8, 2003
    Publication date: March 2, 2006
    Applicant: Kureha Chemical Industry Company, Limited
    Inventors: Kazuyuki Yamane, Ryo Kato, Toshihiko Ono
  • Publication number: 20050228095
    Abstract: The invention provides a polyarylene sulfide resin composition which can be molded with remarkably reduced trouble of mold-deposit and is improved in thermal stability. The composition contains (A) 100 parts by weight of a polyarylene sulfide resin having a nitrogen element content of 0.55 g or less per 1 kg of the resin and (B) 5-400 parts by weight of an inorganic filler.
    Type: Application
    Filed: March 29, 2005
    Publication date: October 13, 2005
    Applicants: Polyplastic Co., Ltd.,, Kureha Chemical Industry Company, Limited
    Inventors: Katsuhei Onishi, Hirohito Kawama, Kouichi Suzuki, Hiroyuki Sato
  • Publication number: 20050175801
    Abstract: There are provided a bottle which has a laminate structure including a glycolic acid polymer layer showing good gas-barrier property in addition to a principal resin layer and is yet provided with excellent recyclability, and also an efficient method of recycling the bottle. More specifically, a bottle having a laminate structure including at least one layer of glycolic acid polymer in addition to a principal resin layer, is obtained. After breaking the bottle, the broken pieces are washed with alkaline water, water or acidic water to remove the glycolic acid polymer layer, thereby recovering the principal resin.
    Type: Application
    Filed: May 16, 2003
    Publication date: August 11, 2005
    Applicant: KUREHA CHEMICAL INDUSTRY COMPANY, LIMITED
    Inventors: Kazuyuki Yamane, Ryo Kato, Hiroyuki Sato
  • Publication number: 20050165063
    Abstract: It is intended to provide novel amine compounds which are efficacious against diseases such as infection with HIV virus, rheumatism and cancer metastasis. Namely, amine compounds represented by the following general formula (1): In a typical case, A1 and A2 represent each an optionally substituted monocyclic or polycyclic aromatic heterocycle; W represents cyclic C3-10 alkylene, an optionally substituted monocyclic or polycyclic aromatic heterocycle, a monocyclic or polycyclic aromatic ring or a partly saturated polycyclic aromatic ring; X represents O, CH2, C(?O) or NR11; and D is a group represented by the following general formula (4) or (6). In the formula (6), Q represents a single bond, S, O or NR12; and Y is a group represented by the following general formula (7). z represents an optionally substituted monocyclic or polycyclic aromatic ring. In the formula (6), B represents NR25R26. In the above formulae, R1 to R26 each represents hydrogen, alkyl, alkenyl or alkynyl.
    Type: Application
    Filed: September 5, 2003
    Publication date: July 28, 2005
    Applicant: Kureha Chemical Industry Company, Limited.
    Inventors: Toru Yamazaki, Shigeyuki Kikumoto, Masahiro Ono, Atsushi Saitou, Haruka Takahashi, Sei Kumakura, Kunitaka Hirose, Mikiro Yanaka, Yoshiyuki Takemura, Shigeru Suzuki, Ryo Matsui
  • Patent number: 6852827
    Abstract: The invention provides a polyester production process by bulk polymerization in a reactor, wherein the volume of the resulting polyester is shrunk for a release from the inner surface of the reactor, so that the polyester can be recovered in the form of a bulky mass. The invention also provides a reactor for bulk polymerization for polyester, which comprises an inner surface that enabling the resulting polyester to be released therefrom upon its volume shrinkage.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: February 8, 2005
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Kazuyuki Yamane, Yukichika Kawakami, Hiroyuki Sato, Tomohiro Hoshi
  • Publication number: 20040204600
    Abstract: A building material is formed from a specific composition containing a phosphoric ester compound represented by the following formulae (8)-c and (8)-d and copper ions, in a resin plate.
    Type: Application
    Filed: April 22, 2004
    Publication date: October 14, 2004
    Applicant: KUREHA CHEMICAL INDUSTRY COMPANY, LIMITED
    Inventors: Naoki Hayashi, Hiroki Katono, Katsuichi Machida
  • Publication number: 20040110844
    Abstract: The present invention provides an anti-tumor pharmaceutical composition having a high anti-tumor effect with low side-effects.
    Type: Application
    Filed: August 4, 2003
    Publication date: June 10, 2004
    Applicant: KUREHA CHEMICAL INDUSTRY COMPANY, Limited
    Inventor: Kyoya Takahata
  • Patent number: 6686427
    Abstract: A vinylidene fluoride polymer having good high-temperature coloring resistance is produced through suspension polymerization at 10-100° C. in a mixture solvent of 100 wt. parts of an aqueous medium and 10-50 wt. parts of a halogenated hydrocarbon solvent showing a good dissolving power to both a vinylidene fluoride monomer and a polymerization initiator and represented by a formula of: CX3CX2CHX2, wherein X is a fluorine or chlorine atom, and 7 X's include 4-6 fluorine atoms and 1-3 chlorine atoms. The vinylidene fluoride polymer is characterized by an elutable total organic carbon content in pure water at 95° C. of at most 1.1 &mgr;g/cm2.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: February 3, 2004
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Takumi Katsurao, Toshio Hosokawa, Katsuo Horie, Yoshikichi Teramoto, Aisaku Nagai
  • Patent number: 6677416
    Abstract: A production method of a PVDF monofilament according to the present invention comprises a drawing step of drawing a melt-spun PVDF monofilament; and a dry thermal relaxation treatment step of subjecting the drawn PVDF monofilament to a relaxation thermal treatment in a gas phase at a temperature between 220° C. inclusive and 300° C. and under such conditions that a relaxation rate falls between 4% inclusive and 10% and that a passing time is not more than 5 seconds, thereby obtaining the PVDF monofilament satisfying the relation represented by Eq (1) below; Y≧d3×2×10−7−d2×2×10−4+d×1.17×10−2+73.11  (1) (where d indicates a diameter (&mgr;m) and Y a knot strength (kgf/mm2)) and having a knot elongation of not less than 24% and a straight elongation of not less than 30%.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: January 13, 2004
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Takashi Sato, Kazuyuki Munakata, Shingo Imamura
  • Patent number: 5105661
    Abstract: A detection method of a liquid level supplies fluid between a moving cylindrical body such as a parison in a film manufacturing process and an ultrasonic transmitter and receiver or an ultrasonic transmitter-receiver opposite to an outer surface of the cylindrical body to keep acoustic contact between an ultrasonic vibration member and the cylindrical body through the fluid. A level of liquid in the cylindrical body is measured on the basis of whether ultrasonic propagating in the fluid and the liquid in the cylindrical body can be received with a predetermined signal level or not. Since the ultrasonic vibration member is brought into contact with the cylindrical body through the fluid, and the contact state therebetween is kept good, and wear, flaw, deformation, frictional heat or the like is not given to the cylindrical body. Further, even if the surface of the cylindrical body is rugged, good contact can be kept.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: April 21, 1992
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Takuo Sekita, Takashi Abe
  • Patent number: 5078311
    Abstract: A dispensing carton in which a film wound cylindrically is contained includes a bottom panel, a rear panel, a front panel, both side panels, a lid member which is hingedly joined to the rear panel, a front flange joined to an end of the lid member to overlap the front panel when said lid member is closed, and a cutter mounted along an end of the front flange. The front flange includes a convex edge including, for example, a V-shaped edge. A saw-tooth edge of the cutter mounted along the end of the front flange is arranged into a convex shape such as V-shape. A length from the tip of at least one tooth of the saw-tooth edge nearest to a base of the box to the bottom of a gullet adjacent to the tooth is longer than a length from the tip of other teeth to the bottom of gullets adjacent to the other teeth. When the film is pulled out of the carton and further pulled in the horizontal direction or twisted while being pulled, the tooth of the cutter nearest to the base of the box first cuts into the film.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: January 7, 1992
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Takashi Taguchi, Yorio Takemura
  • Patent number: 5050788
    Abstract: A dispensing carton containing film wound cylindrically includes an adhesive retaining device which retains the leading edge of the film left after the film pulled out from a carton box has been cut by a cutter. The retaining device includes a base member, a sticking layer mounted on one surface of the base member to fix the base member on the surface of the front panel and an adhesive layer mounted on the other surface of the base member. The adhesive layer is formed of grafted copolymer obtained by graft-polymerizing vinyl chloride monomer with copolymer of ethylene and vinylacetate. Preferably, the adhesive layer is formed of grafted copolymer obtained by graft-polymerizing vinyl chloride monomer having weight ratio of 80-20 with copolymer of ethylene and vinylacetate having weight ratio of 20-80 in which the weight ratio of ethylene and vinylacetate is 20-70 to 80-30.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: September 24, 1991
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Takashi O. Taguchi, Akio Ouchi, Mitsunobu Uchida
  • Patent number: 4765117
    Abstract: A film continuously fed passes through first rollers and second rollers disposed at wider spaces than that of the first rollers. The first and second rollers are relatively moved and the speed of part of the film continuously fed is reduced to zero temporarily. The tape cut into a strip is juxtaposed in contact with the part of the film of which the speed is reduced to zero and is welded to the film by means such as the high-frequency welding means in spaced manner.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: August 23, 1988
    Assignees: Kureha Chemical Industry Company Limited, Toyama Sanki Company Limited
    Inventors: Masami Akutsu, Koh Myowa, Noboru Hirasawa
  • Patent number: 4765118
    Abstract: The apparatus for welding a strip of tape to film includes a tape feed roller for feeding the film continuously and a welding roller disposed in a position where the film is held between both the rollers, both the rollers being rotated in synchronism with each other. The tape is held onto the outside periphery of the tape feed roller and is cut into a strip by a cutting member. The tape is fed to be overlapped on the film while being held onto the tape feed roller. The film and the tape are held between the tape feed roller and the welding roller and the tape is welded to the film in spaced manner by a welding member provided with the welding roller.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: August 23, 1988
    Assignees: Kureha Chemical Industry Company Limited, Toyama Sanki Company Limited
    Inventors: Masami Akutsu, Tsutomu Kamojima, Noboru Hirasawa
  • Patent number: 4750534
    Abstract: A stuffer nozzle of a double pipe type is inserted in a cylindrical member formed by joining opposite ends of a film. Fluid material such as raw egg is supplied from an inner pipe of the stuffer nozzle to fill the cylindrical member with the fluid material. An air valve communicating with an outer pipe of the stuffer nozzle is opened to exhaust air in the cylindrical member and reduce pressure in the cylindrical member in synchronism with a timing that a pair of squeezing rollers squeeze the cylindrical member filled with the fluid material. The squeezed cylindrical member is clamped by a clamping member. The air vent valve is closed to prevent air from entering into the cylindrical member from outside through the outer pipe of the stuffer nozzle in synchronism with a timing that the squeezing rollers are separated from the cylindrical member.
    Type: Grant
    Filed: April 17, 1987
    Date of Patent: June 14, 1988
    Assignee: Kureha Chemical Industry Company Limited
    Inventors: Noboru Hirasawa, Kiyomi Seya, Zenya Kato