Plural Metallic Films Or Foils Or Sheets Patents (Class 442/233)
  • Patent number: 10370536
    Abstract: A resin composition comprising a polyphenylene ether (A) having a number average molecular weight of 500 to 5000; a cyclophosphazene compound (B); a non-halogen-based epoxy resin (C); a cyanate compound (D); and a filler (E).
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: August 6, 2019
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yoshitaka Ueno, Masataka Kudo, Michio Yaginuma
  • Patent number: 10121947
    Abstract: Flexible LED assemblies (300) are described. More particularly, flexible LED (320) assemblies having flexible substrates (302) with conductive features (304, 306) positioned on or in the substrate, and layers of ceramic (310) positioned over exposed portions of the substrate to protect against UV degradation, as well as methods of making such assembles, are described.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: November 6, 2018
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ravi Palaniswamy, Alejandro Aldrin Il Agcaoili Narag, Siang Sin Foo, Hiromitsu Kosugi
  • Patent number: 9708468
    Abstract: A thermosetting resin composition contains a thermosetting resin, a hardener capable of reacting with the thermosetting resin, and a flame retardant. The flame retardant contains a first phosphor compound compatible with a mixture of the thermosetting resin and the hardener, and a second phosphor compound incompatible with the mixture.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: July 18, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuki Kitai, Hiroaki Fujiwara, Hirosuke Saito
  • Patent number: 9480164
    Abstract: It is an object of the present invention to provide, without using a halogenated compound or a phosphorus compound, a resin composition for printed wiring boards, a prepreg, a laminate, and a metal foil-clad laminate, each of which has high-degree flame retardance, has a low water absorption ratio and a high glass transition temperature, and has a high elastic modulus at high temperature. A resin composition according to the present invention includes a specific maleimide compound (A); a cyanate ester compound (B); a non-halogen epoxy resin (C); and an inorganic filler (D).
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: October 25, 2016
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Takaaki Ogashiwa, Hiroshi Takahashi, Tetsuro Miyahira, Yoshihiro Kato
  • Patent number: 9288900
    Abstract: A printed circuit board includes an insulation layer adjacent to a high-speed signal wire layer. A low-loss material layer is provided between the high-speed signal wire layer and the insulation layer. As a result, it is possible to reduce frequency loss of a high-speed signal wire layer and improve reliability of the printed circuit board.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: March 15, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: You Bean Kim, Seock-Hwan Kang, Jong Seo Lee
  • Patent number: 9006119
    Abstract: Disclosed is to a composite material, a structural element comprised of the composite material, an airplane wing spar and their methods of production. Some embodiments of the present invention include composite materials comprised of multiple layers of arrays of metallic bodies separated by layers of non-metallic material, wherein the orientation of metallic bodies in some metallic layers is structurally complementing to the orientation of metallic layers in adjacent metallic layers. Other embodiments of the present invention include structural elements, such as an airplane wing spar, comprised of the composite material.
    Type: Grant
    Filed: July 11, 2010
    Date of Patent: April 14, 2015
    Assignee: A.L.D. Advanced Logistics Development Ltd.
    Inventors: Zigmund Bluvband, Viktor Shkatov
  • Publication number: 20150004384
    Abstract: A layered insulation apparatus and method of making that contains a multiple layer insulation that has top and bottom outside moisture barrier layers, with at least two flame retardant layer around a center metal layer. The metal layer may be two metal sheets with a scrim there-between. The metal layer is highly polished to reflect heat. The metal layer is protected from heat by the flame retardant layers and protected from moisture by the outside moisture barrier layers. A sound abatement layer may optionally be layered on top of the first moisture barrier layer.
    Type: Application
    Filed: August 21, 2014
    Publication date: January 1, 2015
    Inventor: John W. Mallette
  • Publication number: 20140370771
    Abstract: Provided are a resin composition having excellent electrical characteristics and heat resistance after moisture absorption, and being also excellent in flowing characteristics at the time of production of a laminate, and a prepreg, a metal foil-clad laminate and a resin sheet using the same. Used is a resin composition comprising a bifunctional phenylene ether oligomer (a) having a polyphenylene ether skeleton, an aralkyl-based cyanate ester compound (b), a bisphenol-based cyanate ester compound (c), an epoxy resin (d), a brominated carbonate oligomer (e), an inorganic filler (f), an alkoxynaphthol-based polymerization inhibitor (g) and/or a thioether-based polymerization inhibitor (h).
    Type: Application
    Filed: August 24, 2012
    Publication date: December 18, 2014
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Naoki Oka, Syouichi Itoh, Masataka Kudo, Michio Yaginuma
  • Publication number: 20140366474
    Abstract: A self supporting panel system used to fabricate ceilings, floors, walls, or roofs. The panel system is assembled from a plurality of panels, each having a core that is sandwiched between opposing plate members. In a preferred embodiment, the core of each panel includes a unifying material to enhance the load bearing capacity of the panel.
    Type: Application
    Filed: February 18, 2014
    Publication date: December 18, 2014
    Inventors: Lawrence J. Wrass, James K. Peterson, Robert P. Broad
  • Publication number: 20140199909
    Abstract: The invention provides a silicone-organic resin composite laminate comprises a laminate in which an organic resin layer containing an inorganic fiber cloth into which a thermosetting organic resin has been impregnated, and a silicone resin layer containing an inorganic fiber cloth into which a curable silicone resin has been impregnated, being laminated with each one or more layers, and metal foils laminated at an uppermost surface and a lowermost surface of the laminate. There can be provided a silicone-organic resin composite laminate which has low linear expansion, good thermal dimensional stability, excellent mechanical characteristics, and excellent heat resistance and light resistance, and is suitable as a mounting substrate for an LED which corresponds to increase in luminance of the LED mounted substrate.
    Type: Application
    Filed: December 24, 2013
    Publication date: July 17, 2014
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Shigeo YAMAGUCHI, Saiko AKAHANE, Toshio SHIOBARA
  • Patent number: 8524622
    Abstract: In a skin material of vehicle interior equipment, which includes a first fabric material that is formed of a first conductive wire material and a main fiber material weaker than the first conductive wire material, and a manufacturing method for the skin material, part of the main fiber material is removed from the first fabric material, and a conductive member, which is used to supply electric power to the conductive wire material, is electrically connected to the exposed first conductive wire material.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: September 3, 2013
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Fumitoshi Akaike, Kohei Kato, Shigehiro Fujita, Takazo Fujii, Hideaki Kunisada
  • Patent number: 8287984
    Abstract: The invention concerns an under-roof screen (100) comprising: a first layer (102) produced from a first metallic or metallized material forming a thermal reflection barrier; a second layer (108) produced from a second woven material bonded to the first layer (102); a third layer (106) produced from a third insulating material and bonded to the second layer (108); and a fourth layer (104) produced from a fourth metallic or metallized material forming a thermal reflection barrier and bonded to the third layer (106); the first layer (102) and the second layer (108) being provided with micro-perforations (110) providing permeability to water vapor and impermeability to water and the fourth layer (104) being provided with perforations (112) providing permeability to water vapor.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: October 16, 2012
    Assignee: Loda S.A.R.L.
    Inventor: Patrick Grall
  • Patent number: 8263225
    Abstract: Copper clad laminates having reduced laminate curl include copper foil with a tensile strength of less than 47 ksi.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: September 11, 2012
    Assignee: Isola USA Corp.
    Inventors: Cathy Hendricks, Kathy Kelly, Martin Choate
  • Patent number: 8216658
    Abstract: In a laminate, comprising at least one series of metal layers and fiber-reinforced plastic layers which are attached to one another, at least two different series are provided, these series including a transition, and at the location of the transition at least one of the internal layers is discontinuous and all the other layers are continuous.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: July 10, 2012
    Assignee: Fokker Aerostructures B.V.
    Inventors: Abdoel Faziel Rajabali, Willem Jan Nicolaas Ter Steeg
  • Patent number: 8101252
    Abstract: An air bag which is light and pliable to be compactly housed and excellent in durability against a load applied thereto, upon the actuation of air bag, and long term aging, which is formed of two woven fabrics interwoven with each other to be a bag-shaped body, each composed of polyamide type synthetic fiber yarns containing copper compounds in a range from 30 to 200 ppm estimated in term of copper or cut pieces of the fabric sewn together to be a three-dimensional shape, the fabric having a product of a total fineness of warp or weft multiplied by a weave density of 16000 decitex·ends/2.54 cm or less, a load at 15% elongation in a range from 3 to 35 N/%/2.54 cm and a tensile work at break in a range from 7000 to 30000 N·%/2.54 cm. This air bag may be applicable to a driver's seat, a passenger's seat, and to side impact protection in a vehicle.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 24, 2012
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshinori Kami, Hideaki Ishii
  • Patent number: 7799710
    Abstract: A foamed composite armor laminate comprising interleaved combinations of ballistic resistant fabrics, and ceramic and/or metallic plates or sheets in a polymeric foam matrix. The foamed composite armor can be fabricated by inserting polymer powder or sheets between layers of fabric and/or ceramic or metallic sheets to form a laminated structure, heating this laminated structure under pressure to form a consolidated panel, and then foaming the polymeric portion of the consolidated panel in an autoclave or pressure vessel by saturating the polymeric portion with inert gas at elevated temperature, rapidly releasing the pressure and controllably cooling the laminated structure to ambient. Alternatively, pre-foamed panels can be laminated to fabric, ceramic and/or metallic sheets using adhesives or the like. Through proper selection of the various elements of the laminate, i.e.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: September 21, 2010
    Inventor: Seng Tan
  • Publication number: 20090203279
    Abstract: A vinyl-compound-based resin composition containing a terminal vinyl compound (a) of a bifunctional phenylene ether oligomer having a polyphenylene ether skeleton, a specific maleimide compound (b), a naphthol aralkyl type cyanate ester resin (c) and a naphthalene-skeleton-modified novolak type epoxy resin (d) for a high-multilayer and high-frequency printed wiring board, which resin composition is excellent in varnish shelf life at low temperature and does not show a decrease in multilayer moldability, heat resistance after moisture absorption, electrical characteristics and peel strength even in a winter period and for a long period of time, and a prepreg, a metal-foil-clad laminate and a resin sheet each of which uses the above resin composition.
    Type: Application
    Filed: February 11, 2009
    Publication date: August 13, 2009
    Inventors: Kenichi Mori, Syouichi Itoh
  • Patent number: 7084083
    Abstract: The invention is a new heat and fire resistant material. The material is made of a woven silica-based cloth layered in several possible combinations with foil and fiberglass cloth layers. The layers can be arranged in a variety of sequences to minimize the thermal radiation to the inside of the material, but a foil layer must always be the outermost layer to provide protection from radiant heat.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: August 1, 2006
    Assignees: The United States of America as represented by the Secretary of Agriculture, The Governors of the University of Alberta
    Inventors: Leslie Leah Anderson, Mary Ann Davies, Anthony Clement Petrilli, Mark Y. Ackerman
  • Patent number: 6881506
    Abstract: The invention is a new heat and fire resistant material and an improved wildland fire shelter and kit. The material is made of a woven silica-based cloth layered in several possible combinations with foil and fiberglass cloth layers. The layers can be arranged in a variety of sequences to minimize the thermal radiation to the inside of the material or shelter. However, a foil layer must always be the outermost layer to provide protection from radiant heat and a layer of foil must be present between the interior of the shelter or material and any layer of adhesive to limit accumulation of gases inside the shelter if the adhesive or other substance should break down when exposed to heat. The silica cloth, aluminum foil, and fiberglass cloth may be laminated or sewn together. The shape of the fire shelter is a half cylinder with ¼ sphere at each end. The shelter is contained in an easy-open polyvinyl bag which provides for quick removal and deployment of the fire shelter.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: April 19, 2005
    Assignees: The United States of America as represented by the Secretary of Agriculture, The Governors of the University of Alberta
    Inventors: Leslie Leah Anderson, Mary Ann Davies, Anthony Clement Petrilli, Mark Y. Ackerman
  • Patent number: 6869661
    Abstract: The present invention provides a flexible heat reflective radiant barrier that may be conveniently installed on a structure without the need to simultaneously replace rigid construction decking panels. The flexible heat reflective radiant barrier is for use as part of the outer-protective water-shedding materials of a structure or building, such as underneath shingles, tiles, or siding. At least one heat reflective layer is adhered to at least one layer of a felt roofing material. The flexible heat reflective radiant barrier may be disposed in rolls for case of storage and handling. The rolls are easily applied to rigid construction decking panel substrates, such as plywood or oriented strand board construction sheets of structural 2×4, 2×6 side walls or the like, as a part of the exterior water-shedding material.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: March 22, 2005
    Inventor: David D. Ahr
  • Patent number: 6831024
    Abstract: The conductive fabric is fabricated by preparing a base fibrous fabric substrate having the form of a woven, non-woven, or mesh sheet, forming a first layer formed on the fibrous fabric substrate in accordance with an electroless plating process, the first layer being made of copper, and forming a second layer as an externally exposed layer, on the first layer continuously, the second layer being made of gold or platinum.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: December 14, 2004
    Assignees: AMIC Co., Ltd.
    Inventor: Sun-Ki Kim
  • Publication number: 20040087232
    Abstract: The invention is a new heat and fire resistant material and an improved wildland fire shelter and kit. The material is made of a woven silica-based cloth layered in several possible combinations with foil and fiberglass cloth layers. The layers can be arranged in a variety of sequences to minimize the thermal radiation to the inside of the material or shelter. However, a foil layer must always be the outermost layer to provide protection from radiant heat and a layer of foil must be present between the interior of the shelter or material and any layer of adhesive to limit accumulation of gases inside the shelter if the adhesive or other substance should break down when exposed to heat. The silica cloth, aluminum foil, and fiberglass cloth may be laminated or sewn together. The shape of the fire shelter is a half cylinder with ¼ sphere at each end. The shelter is contained in an easy-open polyvinyl bag which provides for quick removal and deployment of the fire shelter.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 6, 2004
    Inventors: Leslie Leah Anderson, Mary Ann Davies, Anthony Clement Petrilli, Mark Y. Ackerman
  • Patent number: 6599850
    Abstract: A flexible reflective insulating structure includes a layer of flexible fiber-based material, and a flexible metallic layer having a first surface of emissivity less than 0.1. The metallic layer is attached to the layer of fiber-based material with its first surface facing towards the layer of fiber-based material. The fiber-based material is preferably attached to the metallic layer in a manner such that the emissivity of at least about 85% of the first surface, and preferably at least about 95% and most preferably at least about 97% is substantially unaffected.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: July 29, 2003
    Inventor: Raphael Heifetz
  • Patent number: 6558783
    Abstract: Disclosed are a curable polyphenylene ether (PPE) resin composition comprising (a) a PPE resin and (b) a of a compound having a 3,4-dihydro-3-substituted-1,3-benzoxazine skeleton (DSBS compound), or a mixture of the DSBS compound and a ring-opening polymerization re-action product thereof; a cured PPE resin composition obtainable by curing the curable PPE resin composition; and a laminate structure obtained by using the curable or cured PPE resin composition. The curable PPE resin composition exhibits, after cured, excellent chemical resistance, moisture resistance, dielectric characteristics, heat resistance, flame retardancy and dimensional stability, so that it can be used as a dielectric, insulating or heat resistant material in the electrical, electronic, space and aircraft industries.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: May 6, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Akihiro Kato, Shozo Kinoshita
  • Publication number: 20030013370
    Abstract: A garment and method for reducing electromagnetic radiation produced by a transmitting device typically located inside a body. The garment may include material to prevent or lower electromagnetic radiation. A method for using such a garment to lower electromagnetic emissions is described.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 16, 2003
    Inventor: Arkady Glukhovsky
  • Patent number: 6291374
    Abstract: An electrical substrate material is presented comprising a resin matrix which includes a thermosetting polybutadiene or polyisoprene resin, an ethylene propylene rubber, and optionally a thermoplastic unsaturated butadiene- or isoprene-containing polymer; a particulate filler, a flame retardant additive, a curing agent, and a woven or unwoven fabric. The presence of the ethylene propylene rubber enhances the heat age properties of the substrate material, particularly the dielectric strength and the mechanical properties, while other electrical, chemical, and mechanical properties of the material are not adversely effected.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: September 18, 2001
    Assignee: World Properties, Inc.
    Inventor: Vincent R. Landi
  • Patent number: 6283166
    Abstract: A glass woven fabric composed of glass fiber warp threads and glass fiber weft threads, characterized in that the glass fiber warp threads are woven with the glass fiber weft threads at intervals of at least 10 mm in each of the warp and weft directions and characterized by comprising a glass fiber woven fabric portion having non-woven portions in each of which a warp layer in which only the glass fiber warp threads are successively placed side by side and a weft layer in which only the glass fiber weft threads are successively placed side by side are laminated. When the glass woven fabric of this invention is used, a printed wiring board excellent in dimensional stability and surface smoothness can be provided.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: September 4, 2001
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Keita Miyasato, Eiji Sato
  • Patent number: 6071836
    Abstract: An electrical substrate material is presented comprising a thermosetting matrix of polybutadiene or polyisoprene in an amount of about 15 to about 50 volume %; a fabric reinforcement in an amount of 0 to about 40 volume %; a particulate filler, preferably ceramic, in an amount of from 0 to about 60 volume %; microballoons in an amount from 0 to about 60 volume %; and optionally a flame retardant. A peroxide cure initiator and/or crosslinking agent may optionally be added. The presence of a very high surface area particulate filler, preferably fumed silica, is also preferred, in that its presence results in a prepreg which has very little tackiness and can therefore be easily handled by operators. This low tackiness feature allows for the use of conventional automated layup processing, including foil cladding, using one or more known roll laminators.
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: June 6, 2000
    Assignee: World Properties, Inc.
    Inventors: Michael E. St. Lawrence, Doris I. Hand
  • Patent number: 6048807
    Abstract: An electrical substrate material is presented comprising a thermosetting matrix which includes a polybutadiene or polyisoprene resin, an unsaturated butadiene- or isoprene-containing polymer and an ethylene propylene rubber; a particulate filler and, a fabric. Preferred ethylene propylene rubbers are ethylene propylene copolymers and ethylene propylene diene terpolymer rubbers wherein the diene is dicyclopentadiene. The ethylene propylene rubber is present in an amount of up to about 20 wt % with respect to the resin, preferably in an amount of about 1 to about 7 wt %, more preferably about 5 wt %. The presence of the ethylene propylene rubber enhances the dielectric strength of the resulting electrical substrate material, while other electrical, chemical, and mechanical properties of the material are not adversely effected.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: April 11, 2000
    Assignee: World Properties, Inc.
    Inventor: Vincent R. Landi
  • Patent number: 6013588
    Abstract: The present invention relates to a printed circuit board and a printed circuit board base material for use in the printed circuit board. The printed circuit board base material of the present invention is produced by impregnating a carbon core material such as carbon cloth with a first resin such as epoxy resin, and the printed circuit board of the present invention is characterized in that resin pores are opened on the printed circuit board base material, second resins such as epoxy resins are filled in the resin pores, circuit layers are formed on the printed circuit board base material, through holes connecting the circuit layer together are provided, and the center line of the resin pore is approximately in line with the center line of the through hole.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: January 11, 2000
    Assignee: O.K. Print Corporation
    Inventor: Yosuke Ozaki
  • Patent number: 5972811
    Abstract: An electrical substrate material is presented comprising a thermosetting matrix of polybutadiene or polyisoprene and a co-curable second resin distinct from the first resin. A peroxide cure initiator and/or crosslinking agent may optionally be added. The presence of a very high surface area particulate filler, preferably fumed silica, is also preferred, in that its presence results in a prepreg which has very little tackiness and can therefore be easily handled by operators. This low tackiness feature allows for the use of conventional automated layup processing, including foil cladding, using one or more known roll laminators. While the prepreg of this invention is tack-free enough to be handled relatively easily by hand, it is also tacky enough to be tacked to itself using a roll laminator (e.g., nip roller) at room temperature.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: October 26, 1999
    Assignee: World Properties, Inc.
    Inventors: Michael E. St. Lawrence, Doris I. Hand, Vincent R. Landi, Robert H. Walker, Samuel Gazit, Raymond R. Miskiavitch
  • Patent number: 5858887
    Abstract: An electrical substrate material is presented comprising a thermosetting matrix of polybutadiene or polyisoprene in an amount of 25 to 50 volume %; a woven glass fabric in an amount of 10 to 40 volume %; a particulate, preferably ceramic filler, in an amount of from 5 to 60 volume %; and a flame retardant. Importantly, the composition comprises only a single resin, i.e., polybutadiene or polyisoprene. A peroxide cure initiator and/or crosslinking agent may optionally be added. The presence of a very high surface area particulate filler, preferably fumed silica, is also preferred, in that its presence results in a prepreg which has very little tackiness and can therefore be easily handled by operators. This low tackiness feature allows for the use of conventional automated layup processing, including foil cladding, using one or more known roll laminators.
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: January 12, 1999
    Assignee: World Properties, Inc.
    Inventors: Michael E. St. Lawrence, Doris I. Hand
  • Patent number: 5854142
    Abstract: A harness frame of light weight manufactured from a laminated plate material is disclosed. The laminated plate material comprises (a) a composite material layer comprising a resin matrix and a reinforcing layer formed of reinforcing fibers and (b) metallic layers superposed one each on the opposite surfaces of the composite material layer. In a preferred mode, resin sheets and reinforcing layers of reinforcing fibers are alternately superposed, two metallic layers are set in place one each on the vertically opposite surfaces of the superposed layers, and the layers are heated and compressed with a pressing machine to induce thermal welding of the component layers. The laminated plate material has the metallic layers superposed with high adhesive strength on the opposite surfaces of a composite material layer having a plurality of reinforcing layers embedded in a resin matrix.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: December 29, 1998
    Assignee: YKK Corporation
    Inventors: Hirokazu Inoguchi, Mikiya Fujii, Haruo Matsushima, Yoshinori Masuda, Yoshiharu Tanaka
  • Patent number: 5837624
    Abstract: To enhance the tear strength without increasing the thickness, a woven glass cloth having a mass of 15 to 30 g/m.sup.2, for use as a base material for printed wiring board material, is characterized in that the weft or warp is provided by a 75 denier or more strand, thicker than the warp, and thread count of the thicker strand per unit length is set smaller than that of the other strand.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: November 17, 1998
    Assignees: Matsushita Electric Works, Ltd., Nitto Boseki Co., LTd.
    Inventors: Kozo Sakaguchi, Fumio Nagamine, Keita Miyasato, Hiromasa Hattori, Tatsuya Watanabe, Akinori Hibino