Patents Assigned to Okura Industrial Co., Ltd.
  • Patent number: 5296276
    Abstract: A seamless endless belt formed of a polyether-ether-ketone resin subjected to a specific simultaneous inflation-and-biaxially stretching treatment followed by an optional specific thermosetting/relaxation treatment as well as a process for manufacturing same is disclosed. This belt is manufactured by biaxially stretching a tube of a polyether-ether-ketone resin while inflating the tube at a temperature above the glass transition temperature of the resin but below the melting point of the resin, optionally and preferably thermosetting the stretched tube at 150.degree.-320.degree.C. while relaxing it at a rate of relaxation of 5-30% and then cutting the resultant tube in round slices. The stretched tube may be laminated with a tube of a thermoplastic polyurethane resin so as to form a laminate tube formed of a polyether-ether-ketone resin in the outer and inner tubes with, interposed therebetween, an intermediate tube of a thermoplastic polyurethane resin.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: March 22, 1994
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Satoshi Maruyama, Kenji Tateishi, Kazuo Kondo
  • Patent number: 5271976
    Abstract: A tubular multilayer film including at least two, biaxially stretched tubular layers each formed of a polypropylene resin, wherein the innermost layer contains spherical antiblocking agent particles having an average particle size of 0.2 to 5 .mu.m in an amount of 0.1 to 0.7% by weight, and the outermost layer is free of the spherical antiblocking agent particles is disclosed. The multilayer film may be prepared by biaxially stretching a multilayer tubular raw sheet having an innermost polypropylene layer containing spherical antiblocking agent particles and an outermost polypropylene layer free of such antiblocking agent particles.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: December 21, 1993
    Assignees: Okura Industrial Co., Ltd., Sumitomo Chemical Company, Limited
    Inventors: Kazuo Kondo, Nobuya Ishiguro, Toyoki Wano, Teruo Tada, Teruaki Yoshida
  • Patent number: 5240111
    Abstract: A package in which an article is sealingly enclosed with a thermally shrinkable film having a row perforations used as air discharge port during shrink packaging. A strip of a film is disposed inside of the package to close the perforations and to prevent moisture and germs from entering into the package during storage and transportion of the package.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: August 31, 1993
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Hideyuki Yamashita, Toyoki Wano
  • Patent number: 5169714
    Abstract: A heat-shrinkable polypropylene film adapted to be printed with, particularly, a flexographic ink is disclosed, which comprises a single layer heat-shrinkable film of a polypropylene resin composition containing spherical silicone resin fine particles of 0.2 to 5 microns in average particle size in a content of 0.1 to 0.7% by weight or a multi-layer heat-shrinkable film wherein at least one of the surface layers is such a polypropylene resin composition, with at least one surface of the single layer film or one surface of the surface layer of the multi-layer film having been subjected to corona discharge treatment to such degree that wettability index of the treated surface becomes 36 to 42 dyn/cm.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: December 8, 1992
    Assignees: Okura Industrial Co., Ltd., Sumitomo Chemical Company, Ltd.
    Inventors: Kazuo Kondo, Nobuya Ishiguro, Toyoki Wano, Teruo Tada, Teruaki Yoshida
  • Patent number: 5154864
    Abstract: A biodegradable sheet is produced from an aqueous dispersion containing finely cut cellulose fibers and chitosan. The dispersion is maintained at a temperature T.sub.1 .degree.C. which is within the following range:t.ltoreq.T.sub.1 .ltoreq.t+30wherein t is the boiling point (.degree.C.) of water at a given reduced pressure and is continuously introduced into a defoaming zone maintained at the given reduced pressure and at a temperature within the same range as that of T.sub.1. In the defoaming zone, the dispersion is formed into a downwardly flowing laminar flow so that air entrapped therein is effectively removed therefrom. The defoamed dispersion is then passed through a die and is molded into a sheet which is subsequently dried.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: October 13, 1992
    Assignees: Director-General of Agency of Industrial Science and Technology, Okura Industrial Co., Ltd.
    Inventors: Masashi Nishiyama, Jun Hosokawa, Kazutoshi Yoshihara, Takamasa Kubo, Satoshi Maruyama, Akihiko Ueda, Kunio Kanaoka, Kenji Tateishi, Kazuo Kondo
  • Patent number: 5143952
    Abstract: A composite, molded article is prepared by forming a W/O emulsion containing a vinyl monomer, water, a cement, a polymerization initiator and an emulsifier, followed by molding and hardening. The emulsifier includes a neutralization product of an amide-containing amine with an organic sulfonic acid or an organic acid phosphate. The amide-containing amine is a condensation product obtained by reacting a fatty acid having 8-24 carbon atoms with an amino compound having the general formula (I) or (II):R.sup.1 R.sup.2 N[(CH.sub.2).sub.x --NH].sub.y H (I)R.sup.3 N[(CH.sub.2).sub.z NH.sub.2 ].sub.2 (II)wherein R.sup.1, R.sup.2, R.sup.3 each represent, independently from each other, hydrogen, an alkyl group haaving 1-24 carbon atoms or an alkenyl group having 1-24 carbon atoms, x is an integer of 1-4, y is an integer of 1-8 and z is an integer of 1-4.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: September 1, 1992
    Assignees: Okura Industrial Co., Ltd., Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Takasi Saheki, Hideaki Matsuda, Kinya Yokota, Tominobu Mayuzumi
  • Patent number: 5139805
    Abstract: A multi-ply, heat-shrinkable film has a surface layer for contact with a cooked or processed meat product which is formed of an ethylene-ethyl acrylate-maleic anhydride copolymer or a mixture of the ethylene-ethyl acrylate-maleic anhydride copolymer and a polyolefin, with the content of ethyl acrylate component in the surface layer being 2 to 20% by weight and the content of maleic anhydride component being 1 to 5% by weight. A cooked or processed meat product may be packaged with the multi-ply, heat-shrinkable film and formed according to "zero-loss cooking method".
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: August 18, 1992
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Teruo Tada, Nobuya Ishiguro, Kazuo Kondoh
  • Patent number: 5129518
    Abstract: A package is disclosed which includes an enclosed article, and a thermally shrinkable, synthetic resin film enclosing the article and having opposite, first and second edge portions, the first edge portion being superimposed on and sealed to the second edge portion to form a sealed, overlap portion, the film having perforations arranged in a row in at least one of the first and second edge portions and a coating of a seal-preventive agent provided in part of the overlap portion for weakening the seal in the overlap portion.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: July 14, 1992
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Katsuhiro Tanaka, Shoichi Katoh, Kenji Ohishi
  • Patent number: 5108803
    Abstract: A thermally shrinkable film with a liquid detecting function is prepared by coating or printing one side of the film with an ink which turns color or dissolves upon contact with a liquid. An item or object to be packaged is packaged in a thermally shrinkable film. The thermally shrinkable film and the package are useful for detecting a liquid leaking from the packed item or object, or entering into the package from the outside. This permits a visual inspection of the quality of the item or object packaged therein or of contamination by a foreign substance.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: April 28, 1992
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Kazuo Kondo, Nobuya Ishiguro, Teruo Tada
  • Patent number: 5001016
    Abstract: A heat shrinkable composite film comprises a core layer formed of (a) a straight chain, low density polyethylene having a density of 0.890-0.905 g/cm.sup.3 and a Vicat softening point of 60.degree.80.degree. C. and/or (b) a copolymer of propylene and one or more .alpha.-olefins with 2-8 carbon atoms having a Vicat softening point of 70.degree.110.degree. C., and two outer layers laminated over the opposite surfaces of the core layer and each formed of (c) a crystalline polypropylene resin having a melting point of 135.degree.150.degree. C., the core layer having a thickness of 30-80% of the total thickness of the outer layers and the core layer.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: March 19, 1991
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Kazuo Kondo, Nobuya Ishiguro
  • Patent number: 4923722
    Abstract: A heat shrinkable composite film comprises a core layer formed of (a) a straight chain, low density polyethylene having a density of 0.890-0.905 g/cm.sup.3 and a Vicat softening point of 60.degree.-80.degree. C. and/or (b) a copolymer of propylene and one or more .alpha.-olefins with 2-8 carbon atoms having a Vicat softening point of 70.degree.-110.degree. C., and two outer layers laminated over the opposite surfaces of the core layer and each formed of (c) a crystalline polypropylene resin having a melting point of 135.degree.-150.degree. C., the core layer having a thickness of 30-80% of the total thickness of the outer layers and the core layer.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: May 8, 1990
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Kazuo Kondo, Nobuya Ishiguro
  • Patent number: 4777095
    Abstract: A composite film suitable for shrink-packaging bony cut meat, including at least one oxygen-impermeable layer, and at least one heat sealable, surface layer formed of a thermoplastic resin, said film having the following physical properties:C.sub.L .gtoreq.15C.sub.T .gtoreq.1580.ltoreq.S.sub.L .ltoreq.25080.ltoreq.S.sub.T .ltoreq.250T.gtoreq.1.2S.sub.L +60T.gtoreq.1.2S.sub.T +60wherein C.sub.L and C.sub.T represent the thermal contraction percentages (%) of the film measured in 90.degree. C. hot water in the longitudinal and transverse directions, respectively, S.sub.L and S.sub.T represent the thermal contraction stresses (g/cm) of the film measured in 90.degree. C. hot water in the longitudinal and transverse directions, respectively, and T represents the piercing strength (g) of the film measured in 90.degree. C. hot water.
    Type: Grant
    Filed: September 11, 1986
    Date of Patent: October 11, 1988
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Kazuo Kondo, Nobuya Ishiguro, Teruo Tada
  • Patent number: 4731214
    Abstract: The process for preparing a thermally shrinkable multilayer film composed of a polyamide resin layer as one surface layer and a sealant material layer as the other surface layer includes the step of causing the polyamide resin layer of the oriented laminate film to absorb water in the amount of 7.0% by weight or more before or during the thermal treatment. The laminate film is then dried so as to cause the polyamide resin layer to make the water content in the range form 2.5% by weight to 6.5% by weight while maintaining the oriented laminate film at temperatures of 90.degree. C. or lower after or during the thermal treatment. The thermally shrinkable multilayer film thus prepared is suitable for thermally shrinking packing foods such as roast meat or fresh cut meat.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: March 15, 1988
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Kazuo Kondo, Nobuya Ishiguro
  • Patent number: 4695491
    Abstract: A heat-shrinkable, composite packaging film comprising (a) a core layer of saponified ethylene-vinyl acetate copolymer; (b) a first polymeric outer wall bonded to one side of the core layer; and (c) a second, heat-sealable polymeric outer wall bonded to the other side of the core layer; said first and second outer walls each having a permeability to hot water having a temperature of 90.degree. C. of less than 600 g/m.sup.2 /hour. The film is suitable for packaging meat and other food products subjected to sterilization and heat-shrinking process in a hot water bath.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: September 22, 1987
    Assignee: Okura Industrial Co., Ltd
    Inventors: Kazuo Kondo, Nobuya Ishiguro, Teruo Tada
  • Patent number: 4687615
    Abstract: A method of producing biaxially oriented tubular polyetheretherketone films having good optical and mechanical properties and heat resistance, by rapidly quenching at a rate of at least 24.degree. C. per second an unoriented tubular polyetheretherketone film as melt-extruded through a circular die thereby imparting a crystallinity of not greater than 10% to the film, and continuously introducing the thus produced film into the space between a feed nip roll pair and a pull nip roll pair while reheating the film externally to a temperature of 60.degree.-140.degree. C. and allowing the film to expand under the influence of the internal pressure to an areal draw ratio of 4-36, to thereby attain biaxial orientation.
    Type: Grant
    Filed: September 16, 1985
    Date of Patent: August 18, 1987
    Assignee: Okura Industrial Co., Ltd.
    Inventors: Kazuo Kondo, Satoshi Maruyama