Synthetic Resin Or Polymer Patents (Class 428/349)
  • Patent number: 6057012
    Abstract: A propane fuel storage tank having a fuel-containing tank body with an outer printed sleeve made of linear heat-shrink plastic material heat-shrunk in tight fitting encircling relation about the tank for preventing viewing of surface imperfections in the tank beneath the sleeve. A method of making and reconditioning propane fuel tanks is disclosed which includes loosely positioning a sleeve of such linear heat-shrinkable plastic material about the tank body and exposing the plastic sleeve to a temperature above its heat-shrink temperature to cause it to contract and tightly conform about the outer perimeter of the tank. The sleeve preferably encompasses a central cylindrical side wall of the tank, portions of the upper and lower semi-spherical end walls of the tank, and the lower foot ring, which results in a like-new reconditioned tank without the necessity for complete removal of surface imperfections and prior adhesively applied labels, or the need for complete repainting of the tank.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: May 2, 2000
    Assignee: Blue Rhino Corporation
    Inventors: Joseph T. Culp, Richard Belmont
  • Patent number: 6054198
    Abstract: A thermally-conductive interface for conductively cooling a heat-generating electronic component having an associated thermal dissipation member such as a heat sink. The interface is formed as a self-supporting layer of a thermally-conductive material which is form-stable at normal room temperature in a first phase and substantially conformable in a second phase to the interface surfaces of the electronic component and thermal dissipation member. The material has a transition temperature from the first phase to the second phase which is within the operating temperature range of the electronic component.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: April 25, 2000
    Assignee: Parker-Hannifin Corporation
    Inventors: Michael H. Bunyan, Miksa de Sorgo
  • Patent number: 6051292
    Abstract: A multi-layer packaging film comprising layers having varying degrees of cross-linking when subjected to electron beam (EB) radiation. The outer layer has a high degree of cross-linking to improve the adhesion, strength, toughness and heat resistance of the film and the inner layer has a low degree of cross-linking to improve the sealability. Bags made from the multiple layer films are especially useful for shrink packaging, and particularly for shrink packaging of meats having large cavities.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: April 18, 2000
    Assignee: American National Can Company
    Inventors: Keith Duane Lind, Johnny Qiang Zheng, Jay Daniel Hodson, George Herbert Walbrun
  • Patent number: 6048599
    Abstract: A composite material for electromagnetic fusion bonding materials together includes interconnected first and second portions forming a patterned array. The first portions include layer absorptive magnetic particles in a polymer matrix. The second portions include a polymer positioned to separate each first portion from each other first portion.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: April 11, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Kwang H. Chu, Armond D. Cosman, Richard L. Miklos
  • Patent number: 6045882
    Abstract: A multilayer, biaxially stretched, flexible, hermoplastic film having at least three (preferably five) layers (a), (b), and (c) with layer (b) disposed between layers (a) and (c), layers (a) and (c) each being a blend of at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, having a density of 0.900 g/cm.sup.3 to <0.915 g/cm.sup.3, and a melting point between 85.degree. C. and 125 .degree. C. with at least 5% of a high density polyethylene, and layer (b) being at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, having a density of 0.900 g/cm.sup.3 to <0.915 g/cm.sup.3, and a melting point of 85.degree. C.-125.degree. C., the film being 50.8 micrometers(.mu.) or less in thickness, and having a shrinkage value of at least 60% in at least one direction at 127.degree. C., and a process for making the film.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: April 4, 2000
    Assignee: Viskase Corporation
    Inventor: Craig Lawrence Sandford
  • Patent number: 6045886
    Abstract: This invention provide an adhesive tape and a liquid adhesive for electronic parts having sufficient thermal resistance and reliability. The adhesive tape comprises adhesive layers composed of at least a polyimide comprising the repeating units represented by the formulas (1) and (2) on both sides of the substrate, one of said adhesive layer having a higher glass transition temperature than that of the other adhesive layer: ##STR1## wherein X is --SO.sub.2 -- and/or --C(.dbd.O)--OCH.sub.2 CH.sub.2 O--C(.dbd.O)--,Ar is a divalent group containing aromatic rings, and R is an alkylene group having 1 to 10 carbon atoms or --CH.sub.2 OC.sub.6 H.sub.4 --, and n means an integer of 1 to 20.The stustrate may be a resin layer composed of the above mentioned polyimide.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: April 4, 2000
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Osamu Oka, Takeshi Nishigaya
  • Patent number: 6042676
    Abstract: A heat-transfer label suitable for use on silane-treated glass containers, refundable polyethylene terephthalate containers, and the like. According to one embodiment, the label includes a sheet of paper overcoated with a release layer of polyethylene. A skim coat of wax is overcoated onto the polyethylene-coated paper. A protective lacquer layer comprising a polyester, polyester/vinyl or polyester/vinyl with wax lacquer is printed onto the skim coat. An ink design layer comprising one or more polyester inks is printed onto the protective lacquer layer. An adhesive layer comprising a polyester, polyester/vinyl or polyester/vinyl with wax adhesive is printed onto the ink design layer.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: March 28, 2000
    Assignee: Avery Denmson Corporation
    Inventor: Samuel H. Stein
  • Patent number: 6040036
    Abstract: The invention relates to a photographic element comprising a paper base with a thickness from 0.025 mm to 0.25 mm, at least one photosensitive silver halide layer, and a layer of microvoided and biaxially oriented polyolefin sheet having a layer thickness of 0.020 mm to 0.050 mm, a density of between 78% and 100% of the solid polymer density located between said paper base and said at least one photosensitive silver halide layer, and wherein the entire photographic element is substantially free from surface distortion or cracking when the photographic element is forced to the shape of a diameter of no less than 8.0 mm.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: March 21, 2000
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Robert P. Bourdelais, Douglas N. Haydock, Thaddeus S. Gula
  • Patent number: 6033775
    Abstract: A film containing a first layer containing a propylene-based block copolymer (a) obtainable by forming 40 to 85% by weight of a propylene-ethylene copolymer portion (A) having a content of repeating unit derived from ethylene of 1.5 to 6.0% by weight in a first step, and then forming 15 to 60% by weight of a propylene-ethylene copolymer portion (B) having a content of repeating unit derived from ethylene of 7 to 17% by weight in a second step, the intrinsic viscosity of portion (B) being 2 to 5 dl/g, and the ratio of the intrinsic viscosity of portion (B) to the intrinsic viscosity of portion (A) being 0.5 to 1.8, and a second layer containing a polyethylene type resin (b) laminated on at least one surface of the first layer, has a good balance between heat resistance, flexibility, mechanical strength, transparency, cuttability, original-shape resuming property and other desirable properties, and is suitably used for wrapping materials such as foods.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: March 7, 2000
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Haruo Hayashida, Eisuke Shiratani, Ikuo Yamamoto, Akihiro Ichige
  • Patent number: 6033763
    Abstract: A heat-transfer label suitable for use in decorating polyethylene-coated glass articles. In a preferred embodiment, the label is capable of withstanding pasteurization conditions on a polyethylene-coated glass article and includes (a) a support portion in the form of a sheet of paper overcoated with a release layer of polyethylene, (b) a skim coat of wax overcoated onto the polyethylene release layer and (c) a transfer portion, the transfer portion including a cross-linked phenoxy protective lacquer layer printed onto the skim coat, a polyester ink layer printed onto the protective lacquer layer, a first adhesive layer printed onto the ink layer and onto any exposed portions of the underlying protective lacquer layer, and a second adhesive layer printed onto the first adhesive layer. The cross-linked phenoxy resin comprises a phenoxy resin of the formula ##STR1## wherein phenoxy resin is cross-linked by a melamine formaldehyde resin.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: March 7, 2000
    Assignee: Avery Dennison Corporation
    Inventors: Jean Paul Laprade, James S. Nugent, Darchun Billy Yang
  • Patent number: 6030692
    Abstract: A device comprising a carrier tape with compartments and a cover tape for sealing items in the compartments includes a cover tape having a base film layer, a striped adhesive layer formed on the first surface of the base film to adhere the cover tape to the carrier tape, and an antistatic layer formed on the adhesive layer and base film layer to provide antistatic coating on substantially the entire width of the surface of the base film. A primer layer containing an antistatic agent may be placed on the base film layer as an alternative to an antistatic layer.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: February 29, 2000
    Assignee: Netpco Incorporated
    Inventor: Thomas J. Auger
  • Patent number: 6027802
    Abstract: A cover tape adapted to seal individual components in respective recesses of a carrier tape or a two dimensional carrier tray, including a randomly embossed layer, an adhesive layer covered over one side of the randomly embossed layer, and a non-adhesive layer adhered to the adhesive layer to prevent the components from adhering to the adhesive layer, the randomly embossed layer including an adhesion portion adapted for fastening to the carrier tape through the adhesive layer, a torn strip portion adapted to enhance the cohesive strength of the randomly embossed layer through the non-adhesive layer, and a stress concentration zone disposed between the contact border line of the adhesion portion and the contact border line of the non-adhesive layer, the torn strip portion being peeled off from the adhesion portion along the stress concentration zone before the removal of the encased components from the carrier tape, the applied tearing force to peel off the torn strip portion from the adhesion portion along th
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: February 22, 2000
    Assignee: Four Piliars Enterprise Co., Ltd.
    Inventor: David Lin
  • Patent number: 6024347
    Abstract: A system for detuning from resonance a support structure which receives vibratory energy is disclosed. In one embodiment, the system includes a substrate actuator having at least a first wire embedded in a substrate matrix material, the actuator being couplable to the support structure. The system may further include a heater for heating at least the first wire from a first to a second temperature to increase the modulus of elasticity of the first wire, which in turn increases the stiffness of the substrate actuator. Such an increase in the stiffness of the substrate actuator detunes from resonance structures supporting a device from which vibratory energy emanates, and also inhibits transmission of vibratory energy of specific frequencies into structures supporting equipment sensitive to vibrations.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: February 15, 2000
    Assignee: Lockhead Martin Corporation
    Inventors: Duane D. Grosskrueger, Bernie F. Carpenter, Brian W. Easom, Jerry L. Draper
  • Patent number: 6022612
    Abstract: Packaging films include a polymeric surface layer made from a blend of polyolefin and thermoplastic rubber, particularly a blend of polyolefin and styrene-isoprene-styrene (SIS) block copolymer or styrene-butadiene-styrene (SBS) block copolymer. The films provide a matte-finish surface without the need for surface treatments. The films can alternatively be surface modified to provide excellent cold seal receptive layers.
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: February 8, 2000
    Assignee: Applied Extrusion Technologies, Inc.
    Inventor: Andrew F. Wilkie
  • Patent number: 6017623
    Abstract: For solving a problem of large dependency of peel-off strength upon sealing conditions, a problem of change of various properties with the lapse of time under storing circumstances, a delamination problem, an agglomerate problem and a transparency problem, there is provided a cover tape for packaging electronic components which has a stable peel-off strength and is composed of an outer layer consisting of a biaxially oriented film of any one of polyester, polypropylene and nylon; an intermediate layer consisting of a mixture comprising polyethylene as the main component; and a heat sealant layer consisting of a mixture of a thermoplastic resin and a filler.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: January 25, 2000
    Assignee: Sumitomo Bakelite Company Limited
    Inventor: Hisao Nakanishi
  • Patent number: 6015601
    Abstract: The present invention relates to a self-sealing flexible plastic valve for a non-latex balloon, to a balloon incorporating such a valve, to a method of manufacturing such a valve, and to a method of manufacturing a balloon incorporating such a valve. The valve is made from two flexible plastic strips, bonded together along the side edges to define a valve passageway or tube, and having an open inlet end and an open outlet end. The inlet end of one or both valve strips flares or otherwise curls outwardly to facilitate opening of the valve to insert a gas supply mechanism to inflate the balloon.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: January 18, 2000
    Assignee: Convertidora Industrial S.A. de C.V.
    Inventor: Arturo Verduzco Garcia
  • Patent number: 6015604
    Abstract: An impressed emblem is disclosed which includes a cover sheet which is used together with heat and pressure to impress a desired pattern on an emblem. The emblem can also be impressed with a pattern and simultaneously heat-sealed onto a desired substrate.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: January 18, 2000
    Assignee: Stahls', Inc.
    Inventor: Brett A. Stahl
  • Patent number: 6015600
    Abstract: An article (2) in which at least part of a surface (8) of a polymeric element has an embossed pattern (6). The article may be either heat-recoverable or non-heat-recoverable. If the article is heat-recoverable, when heated the article recovers and the embossed surface becomes substantially smooth. The change in surface texture can be used to indicate that sufficient heat has been applied to the article to achieve adequate recovery and/or to adequately melt an attached adhesive layer (10). In another embodiment, the article (2) is in the form of a patch (14) which can be used to secure the opposing longitudinal edges of heat-recoverable article which is in the form of a wraparound sheet.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: January 18, 2000
    Inventors: Walter J. Greuel, Jr., George Pieslak, Efrain Renteria, Stanley Simpson, Jan L. Vansant, Barnie A. Wallace, Jr.
  • Patent number: 6010792
    Abstract: A multiple layer polymeric film comprising a first and second layer, the composition of said first layer comprising a blend of ethylene vinyl acetate copolymer, linear low-density polyethylene, a second ethylene vinyl acetate copolymer and slip; the composition of said second layer comprising ethylene vinyl acetate copolymer; and a third layer comprising a blend of linear low density polyethylene and low density polyethylene said second layer being disposed between said first and third layer and wherein a color concentrate may optionally and independently be present in layers one, two and three.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: January 4, 2000
    Assignee: American National Can Company
    Inventors: Keith D. Lind, John Eckstein, Robert J. Blemberg
  • Patent number: 6010784
    Abstract: This invention relates to paperboard laminates for pharmaceutical blister packaging. Such structures of this type, generally, employ a hot melt adhesive and calcium carbonate (CaCO.sub.3) blend which is capable of sealing to polytrichlorofluoroethylene (Aclar.RTM.). Aclar.RTM. film is commonly used for high moisture barrier packaging in pharmaceutical applications.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: January 4, 2000
    Assignee: Westvaco Corporation
    Inventor: Ralph Scott Peterson
  • Patent number: 6001438
    Abstract: The present invention provides an acrylated polyolefin tubing (12) crosslinked by irradiation. The tubing (12) is electrically insulating and can be heat shrunk upon a substrate (14) for perfecting a fluid tight seal therewith. The tubing (12) remains adhesively sealed to the substrate (14) and maintains heat sealability after cyclic autoclave sterilization. Moreover, the subject tubing does not permanently discolor after cyclic gamma or electron beam sterilization. The tubing (12) is particularly useful as an outer sheath for electro-surgical instruments (18).
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: December 14, 1999
    Assignee: Insultab, Inc.
    Inventor: Clement U. Bourgault
  • Patent number: 5997967
    Abstract: A side entry heat recoverable article (2) pre-formed to enable a wire bundle (4) to be easily positioned and maintained within the article prior to recovery of the article. The wire bundle snaps into an enlarged section (6) between tab portions (10, 12). An adhesive (24) is disposed on the interior surface of the article for securing the tab portions together and for sealing the wire bundle. Upon recovery of the article, the wire bundle is thereby sealed within the heat recoverable article. A heat recoverable tube (2'), including adhesive, undergoes a post processing step to form the slit sleeve (2) that can be easily handled and installed.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: December 7, 1999
    Inventor: Robert Mark Hawkings
  • Patent number: 5998039
    Abstract: Disclosed is a polypropylene composition comprising (A) polypropylene and (B) a specific propylene-1-butene random copolymer in a specific amount ratio. The propylene-1-butene random copolymer (B) is characterized in that: (1) the copolymer contains 50 to 95% by mol of constituent units from propylene and 50 to 5% by mol of constituent units from 1-butene, (2) the intrinsic viscosity, as measured in decahydronaphthalene at 135.degree. C., is in the range of 0.1 to 12 dl/g, (3) the molecular weight distribution (Mw/Mn), as determined measured by GPC, is not more than 3, and (4) the parameter B value indicating randomness of the copolymerized monomer sequence distribution is in the range of 1.0 to 1.5. Also disclosed is a polypropylene composite film comprising (I) a crystalline polypropylene layer and (II) a layer formed from the polypropylene composition, which is laminated on at least one surface of the crystalline polypropylene layer (I).
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: December 7, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tatsuya Tanizaki, Mikio Hashimoto, Masahiro Sugi, Toshiyuki Tsutsui, Yasuo Tanaka, Mamoru Kagami
  • Patent number: 5993936
    Abstract: An anti-slip separator sheet that increases friction and reduces slippage when handling, storing and shipping goods and packages. The sheet is preferably a plastic net with polymer beads protruding from the top and bottom surfaces of the net. The polymer beads are preferably secured to the net by bonding the polymer beads to each other in the openings of the net. The polymer beads protrude from the surfaces of the net, increasing the coefficient of friction. The anti-slip net is used between goods and packages to reduce slippage.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: November 30, 1999
    Assignee: NSW Corporation
    Inventor: Timothy Gardner
  • Patent number: 5993962
    Abstract: A resealable packaging system, providing a multiple reseal capability. A strip of pressure sensitive adhesive is applied over a first area of a substrate. Then a strip of cold seal adhesive is layered over the strip of pressure sensitive adhesive. A strip of cold seal adhesive is then applied to a second area of the substrate, or to another substrate, whether of the same or a different type. The materials are chosen so that, when the substrate is aligned and the strips of cold seal adhesive bonded together, the bond formed between the strips of cold seal adhesive, and the bond between the pressure sensitive adhesive and the cold seal adhesive, and the bond between the cold seal adhesive and the substrate, are stronger than the bond between the substrate and the pressure sensitive adhesive. Thus, when the two areas of substrate, now bonded together by the cold seal adhesive, are peeled apart, the pressure sensitive adhesive remains with the cold seal adhesive and is exposed.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: November 30, 1999
    Assignee: Ato Findley, Inc.
    Inventors: Larry S. Timm, Tim E. Bublitz
  • Patent number: 5993977
    Abstract: The invention relates to a multilayer product for the production of packaging, the product comprising a carrier web (1), on one face of which there is disposed a tight multilayer coating (2) which includes a moisture-proof layer (b) and a gas-tight layer (a). The gas-tight layer is made up of a blend of an ethylene/vinyl alcohol copolymer and a polar ethylene polymer. The moisture-proof layer is polyolefin, preferably a blend of polyethylene and a polar ethylene polymer.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: November 30, 1999
    Assignee: Borealis A/S
    Inventors: Erkki Laiho, Markku Sainio, Seppo Kuusela, Elina Koski, Tapani Penttinen, Riitta Koskiniemi, Matti Salste
  • Patent number: 5985387
    Abstract: In a thermo-shrinkable polyester film, the thermal shrinkage ratio in a main shrinking direction is about 20% or more after being treated in water of about 70.degree. C. for about seconds, about 35 to about 55% after treated in water of about 75.degree. C. for about 5 seconds, and about 50 to about 60% after being treated in water of about 80.degree. C. for about 5 seconds. After the film is shrunk by about 5% by treatment in water of about 75.degree. C. for about 10 seconds, the probability of the elongation at rupture of the film in the direction perpendicular to the main shrinking direction being about 20% or less, is about 10% or less. The ratio of .tau..sub.1 /.tau..sub.2 is about 0.05 to about 0.45, where .tau..sub.2 is the stress of shrinkage in a main shrinking direction of the film at about 90.degree. C., and .tau..sub.1 is the stress of shrinkage in a direction perpendicular to the main shrinking direction of the film at about 90.degree. C. The sealing strength of the film is about 1.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: November 16, 1999
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kuniharu Mori, Mitsuo Inoue, Shinichiro Okumura, Tsutomu Oko, Norimi Tabota, Masatoshi Hashimoto, Hideki Ito, Seizo Takabayashi, Tsutomu Isaka
  • Patent number: 5985062
    Abstract: The process calls for extrusion of a multilayer tubular structure with semiconducting innermost layer. In production of the sleeve the inner layer is partially removed leaving only a central portion forming an electrode. In addition the intermediate layer is made with a compound having pre-determined relative dielectric constant and dielectric rigidity.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: November 16, 1999
    Assignee: Pirelli Cavi S.p.A.
    Inventors: Ubaldo Vallauri, Francesco Portas
  • Patent number: 5985426
    Abstract: Packaging film having a surface providing improved release properties from cold seal cohesives. The improved cold seal release properties prevent roll blocking when the film is unspooled from roll stock. Web and laminate packaging films are disclosed which incorporate the improved release properties. The packaging film finds special utility in packaging of heat sensitive articles.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: November 16, 1999
    Assignee: Applied Extrusion Technologies, Inc.
    Inventor: Andrew F. Wilkie
  • Patent number: 5981047
    Abstract: A coextruded biaxially oriented polyolefin packaging film has a cold seal release layer, a core layer, and a cold seal receptive skin layer. The release layer is made of (A) about 10% to about 60% by weight ethylene-butylene random copolymer containing between 0% and about 6.0% by weight ethylene and between about 94% and 100% by weight butylene; (B) a blend of two polymers selected from the group consisting of polyethylene ionomers, syndiotactic homopolymer polypropylene, conventional polyethylenes having densities of between 0.91 and 0.965 gm/cm.sup.3, and metallocene-catalyzed polyethylene plastomers; and optionally (C) a non-migratory slip agent present in an amount sufficient to decrease the coefficient of friction of the release layer. Alternatively, the release layer may be made of a two-component blend of the ethylene-butylene random copolymer and high density polyethylene.
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: November 9, 1999
    Assignee: Applied Extrusion Technologies, Inc.
    Inventor: Andrew F. Wilkie
  • Patent number: 5976651
    Abstract: A laminate characterized by consisting of at least 4 layers and having (A) a seal layer which is a polypropylene having a melting point of at least 160.degree. C. as the first layer which is the innermost layer, (B) an adjacent layer consisting of a mixture of 20 to 90% by weight of a polypropylene and 80 to 10% by weight of a 4-methylpentene-1 resin as the second layer, (C) an intermediate layer consisting of a polypropylene having a melting point of at least 160.degree. C. and a melt index of 0.5 to 30 as the third layer and (D) a substrate layer consisting of a polypropylene having a melting point of at least 160.degree. C. and a melt index of 0.01 to 4 as the outermost layer, wherein the melt index of the seal layer (A) is at least 1.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: November 2, 1999
    Assignee: Sumitomo Bakelite Company Limited
    Inventors: Yasuo Tatsumi, Mamoru Yoshimoto, Seigo Akazawa
  • Patent number: 5976698
    Abstract: Process and materials are described for selectively placing uniform spacers on a receptor. Spacer elements are placed on a receptor by selectively irradiating a thermal transfer donor sheet comprising a transferable spacer layer. The transferable spacer layer may include particles or fibers to form a composite. The particles may have a spacing dimension either greater than or less than the thickness of the transferable layer. When the spacing dimension of the particle is greater than the thickness of the transferable layer, then the spacing dimension of the particles control the spacing distance. The process and materials are useful in the manufacture of flat panel displays, particularly, liquid crystal display devices.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: November 2, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: John S. Staral, Claire A. Jalbert, William A. Tolbert, Martin B. Wolk, Allan R. Martens, Thomas A. Isberg
  • Patent number: 5976648
    Abstract: Disclosed is a heterogeneous polymer gel comprising at least two gel networks. One embodiment of the present invention concerns a heterogeneous polymer gel comprising a first gel network comprising an environmentally-stable gel and a second gel network comprising an environmentally-unstable gel wherein the first gel network interpenetrates the second gel network. The heterogeneous polymer gel exhibits controlled changes in volume in response to environmental changes in condition, such as of temperature or of chemical composition.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: November 2, 1999
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Yong Li, Zhibing Hu, Xiaomin Zhang
  • Patent number: 5972139
    Abstract: A method is used to produce thermally shrinkable and electromagnetic wave proof tube and the product thereof which is internally or externally covered with a metallic net-like sleeve woven by soft zinc coated copper wires so as to make the electric cords arrangement in the tube neat, signal transmissions in a higher quality, appealing to eyes and durable against abrasion in use. The net-like sleeve can be woven by means of a weaving machine with different number of soft zinc-coated wires, such as 16, 24, 32 and 48 wires to obtain net-like sleeves of various densities and sizes. A so woven net-like sleeve is expandedly supported by a hollow metallic rod into shape and it can be adhered to the outer or inner surface of a thermally shrinkable tube. The metallic net-like sleeve can shrink along with the plastic tube when heated. It not only can neatly bind electric cords in a tube but also makes the tube appealing to eyes, durable against abrasion and anti-electromagnetic wave in practical operation.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: October 26, 1999
    Assignee: Chye Tay Co., Ltd.
    Inventor: Chung-Chiu Chu
  • Patent number: 5972481
    Abstract: A heat-transfer label that is well-suited for use on styrene-acrylonitrile surfaces. In one embodiment, the label includes a support portion, the support portion comprising a polyethylene-coated paper carrier web. The label also includes a waxlike skim coat overcoated on the support portion. The label further comprises a transfer portion printed on top of the skim coat, the transfer portion including a protective lacquer layer, an ink layer and an adhesive layer. The protective lacquer layer is printed onto the skim coat and comprises nitrocellulose, a release agent, a low molecular weight methyl/n-butyl methacrylate copolymer and a medium molecular weight methyl methacrylate copolymer. The ink layer, which comprises one or more polyamide inks and/or acrylic inks, is printed onto the protective lacquer layer.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: October 26, 1999
    Assignee: Avery Dennison Corporation
    Inventors: Samuel H. Stein, Jean Paul Laprade
  • Patent number: 5972441
    Abstract: A thin-wall PTFE (polytetrafluoroethylene) tube in the form of a tube of porous expanded PTFE film wherein the porous PTFE film has a microstructure containing a multiplicity of fibrils oriented substantially parallel to each other. The tube has a wall thickness of less than about 0.25 mm and is made from at least one first layer and at least one second layer of porous PTFE film, wherein the fibrils of the first and second layers are oriented substantially perpendicular to each other. Preferably the fibrils of the at least one first layer are oriented substantially parallel to the longitudinal axis of the tube and the fibrils of the at least one second layer of porous PTFE film are oriented substantially circumferential to the tube. The first and second layers may be inner and outer layers respectively, or alternatively their relationship may be reversed.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: October 26, 1999
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Carey V. Campbell, Donald G. M. Goffena, James D. Lewis, David J. Myers
  • Patent number: 5972448
    Abstract: The container of the present invention is composed of a polymer material integrated with a plurality of nanosize particles of a clay mineral which act to enhance the barrier properties of the container. The polymer material may be PET, COPET or any mixture thereof. The nanocomposite polymer container decreases the permeability of various gases without substantially altering the fabrication method for producing containers composed of PET or COPET material, and without altering the containers themselves. The nanocomposite polymer containers of the present invention are able to accomplish this due to the minimal amount of clay integrated with the polymer material, between 0.1% and 10% weight of the container. The small amount of clay provides a substantial barrier due to the high aspect ratios of the clay particles which will vary between 100 and 2000.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: October 26, 1999
    Assignee: Tetra Laval Holdings & Finance, SA
    Inventors: Peter Frisk, Jacques Laurent
  • Patent number: 5972444
    Abstract: This invention relates to an improved shrink film having balanced properties. In particular, this invention relates to a biaxially oriented polyolefin shrink film made from a particular polymer mixture which includes a first ethylene polymer component having a single differential scanning calorimetry (DSC) melting peak or a single Analytical Temperature Rising Elution Fractionation (ATREF) peak and a second ethylene polymer component having one or more DSC melting peaks, wherein the density differential between the two component polymers about 0 to about 0.03 g/cc. Improved properties include increased shrink responses, wide orientation windows, higher modulus and high softening temperatures.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: October 26, 1999
    Assignee: The Dow Chemical Company
    Inventors: Rajen M. Patel, Jacquelyn A. deGroot
  • Patent number: 5972490
    Abstract: Biaxially oriented polyolefin films comprising a core layer of propylene polymer, an intermediate layer of a non-voided, substantially non-pigmented propylene polymer on the core layer, and an outer skin layer of a polyolefin including titanium dioxide as a pigment are disclosed. Such films have good gloss.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: October 26, 1999
    Assignee: Hoechst Trespaphan GmbH
    Inventors: Allan J Crighton, Helen A Biddiscombe
  • Patent number: 5972443
    Abstract: A multilayer film and a pouch containing a flowable material are disclosed. The multilayer film is made from two layers of a sealant film with an interposed layer of a polyethylene. The sealant film is made from a material comprising 10 to 100 parts by weight of a copolymer of ethylene and at least one C.sub.4 -C.sub.10 alpha-olefin manufactured in a polymerization process using a single-site polymerization catalyst and from 0 to 90 parts by weight of at least one polymer selected from the group consisting of a linear copolymer of ethylene and at least one C.sub.4 -C.sub.10 alpha-olephin having a density of from 0.900 to 0.930 g/cm.sup.3 and a melt index of from 0.3 to 2.0 dg/min, a high-pressure polyethylene having a density of from 0.916 to 0.930 g/cm.sup.3 and a melt index of from about 1 to 10 dg/min, and blends thereof. The polyethylene of the interposed layer is a high density polyethylene with a density of at least 0.930 g/cm.sup.3 and a melt index of less than dg/min.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: October 26, 1999
    Assignee: Du Pont Canada Inc.
    Inventors: Alan Keith Breck, Alana Verdone
  • Patent number: 5968661
    Abstract: A steel sheet for a heat-shrink band, which is to be thermally expanded and fitted over the outer periphery of the panel portion of a cathode ray tube, which has at least a 20% elongation at an ambient temperature and at least a 40 kg/mm.sup.2 stress of yielding point after the heating and cooling, in particular one comprised by a dual phase cold rolled steel sheet comprising a ferrite phase and a martensite phase or a cold rolled steel sheet containing a retained austenite.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: October 19, 1999
    Assignees: Sony Corporation, NKK Corporation
    Inventors: Ichiro Saito, Shiro Kenmotsu, Tomio Aoki, Kunikazu Tomita, Yasuyuki Takada
  • Patent number: 5965254
    Abstract: Heat sealable polymeric films having an outer, polymeric heat seal layer with a viscosity at its heat sealing temperatures such that it will flow into interstitial spaces between the fibers of a fibrous material and encapsulate the fibers at such temperatures, an intermediate polymeric layer in contact with the heat seal layer, the intermediate polymeric layer being capable of cohesively splitting when the heat sealed film is peeled, and at least one further polymeric layer, the heat seal layer being easier to fracture than the intermediate layer at the temperature at which peeling is to be effected so that heat seal layer ruptures rather than peeling continuing through the intermediate layer once peeling has been effected through the heat sealed zone.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: October 12, 1999
    Assignee: Rexam Medical Packaging Ltd.
    Inventors: Roy Christopherson, Peter John Miles
  • Patent number: 5962092
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/alpha-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/aipha-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an O.sub.2 -transmission rate of from about 500 to 50,000 cc/m.sup.2 /24 hr STP. One outer layer of the film comprises an antifog agent on the outer surface thereof. Also disclosed is a package made from the film. The film is especially suitable for the packaging of oxygen-sensitive products, such as lettuce, and resists fogging up on the inside surface of the film forming the package. Preferably, the package has printing on the outside surface of the film, with the print having good adhesion to the film.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: October 5, 1999
    Assignee: Cryovac, Inc.
    Inventors: Betsy P. Kuo, Mendy J. Walden
  • Patent number: 5958529
    Abstract: A side entry heat recoverable article. The heat recoverable article comprises a longitudinal body member composed of a cross-linked polymer and having a generally C-shaped cross section. The body member preferably includes circumferential ribs. A layer of adhesive adjacent to the interior surface of the body member may be co-extruded with the body member or provided separately. The heat recoverable article is preferably used for repairing damaged wire.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: September 28, 1999
    Assignee: Raychem Corporation
    Inventors: Inho Myong, David W. Solano
  • Patent number: 5955181
    Abstract: The invention relates to a coextruded heat-sealable polyester film having at least one base layer and at least one heat-sealable outer layer, wherein this heat-sealable outer layer comprises a copolymer which contains from 5 to 95% by weight of ethylene 2,6-naphthalate units.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: September 21, 1999
    Assignee: Hoechst Diafoil GmbH
    Inventors: Herbert Peiffer, Cynthia Bennett, Werner Roth, Karsten Fritsch
  • Patent number: 5952071
    Abstract: Two-component curable adhesive for blocking automotive wiring bundles, the respective components preferably amine-terminated polyamide Part A, and acrylate, anhydride or epoxy Part B, being contained in separate sheets which are inter-leaved with one another. The concentration of the reactive components in the sheets is chosen to cause the adhesive to flow on initial heating and then to cure to resist further flow at elevated temperatures in service. Apparatus, kits and method for blocking cables or wire bundles using the adhesive are also claimed.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: September 14, 1999
    Assignee: N.V. Raychem S.A.
    Inventors: Henk Rijsdijk, Noel Overbergh, Gerry De Blick, Graham Miles, Aine Kennan
  • Patent number: 5948513
    Abstract: The invention provides a heat-shrinkable thermoplastics packaging film comprising a laminate of two or more individual heat-shrinkable thermoplastics packaging films, where each of the individual films is substantially identical in composition and layer construction. The films are preferably prepared from double wound film, especially biaxially oriented film comprising LLDPE. The invention also provides a process of preparing such a film, comprising: a) providing two layers of heat-shrinkable thermoplastics packaging film, namely a first layer and a second layer, each of the first and second layers having inner and outer surfaces, the inner surfaces being adjacent to each other; b) treating the outer surface of the first layer to enable the first layer to adhere to the second layer; and c) winding the two layers together into a roll, such that the treated outer surface of the first layer adheres to the outer surface of the second layer to form a laminate.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: September 7, 1999
    Assignee: Cryovac, Inc.
    Inventors: William John Turnbull, Gary David Grant
  • Patent number: 5948489
    Abstract: A tubular catheter body comprising a catheter consisting essentially of plastic material and having a tubular, flexible, and compliant marker band affixed to and surrounding the external surface of the catheter body. The compliant marker band comprises a heat shrinkable plastic material having tungsten particles which are no greater than 2 microns in size such that the marker band is radiopaque throughout.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: September 7, 1999
    Assignee: Cordis Corporation
    Inventor: Ronald J. Hopkins
  • Patent number: 5944929
    Abstract: The support is designed to keep in expanded condition an elastic covering sleeve for elongated cylindrical elements such as electric cable joints and the like. The support comprises a tape wound spirally in side-by-side turns so as to take on a cylindrical tubular form and mutual constraint means between the turns to keep the tape in wound condition. In accordance with the invention the tape and the constraint means are provided in different materials.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: August 31, 1999
    Assignee: Pirelli Cavi S.p.A.
    Inventors: Ubaldo Vallauri, Francesco Portas
  • Patent number: 5945183
    Abstract: A sleeve label having an open top and bottom for sleeving a product such as a bottle, jug, or drum. The sleeve label comprises a plastic film printed on one surface with a solvent base ink. The printed surface is coated with a UV curable coating, covering the printed side including the solvent base ink. Upon curing with UV energy, the coating protects the ink from smearing in contact with solvents. The coating also protects the ink from mechanical damage such as scratching or abrasion. The UV curable coating may be applied to the film with a flexographic print station, or other roll or blade coaters. The coating may be of the free radical acrylate or cationic epoxy types.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: August 31, 1999
    Inventor: David E. Johnson