Next To Addition Polymer From Unsaturated Monomer(s) Patents (Class 428/475.8)
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Patent number: 6562476Abstract: A clear, multilayer polymeric film that is desirable for thermoforming applications. The film in its various embodiments include two inner layers of nylon and/or a core layer of ethylene vinyl alcohol or ethylene vinyl alcohol copolymer sandwiched between the two inner nylon layers. The film also has an outer layer of a heat sealable polymer and may also have an outer layer of nylon. The film is coextruded, blown into a tubular shape, oriented, and cooled by the method of tubular water quenching. The film has various improved physical properties over the prior art, including properties of “memory”, clarity, gloss and low haze.Type: GrantFiled: October 4, 1999Date of Patent: May 13, 2003Assignee: Pechiney Emballage Flexible EuropeInventors: Mary E. Shepard, Scott W. Middleton, Robert J. Blemberg, Jerry F. Jesse
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Patent number: 6555242Abstract: A longitudinally stretched multilayered film having good barrier properties is described. The film is prepared by a process comprising (a) preparing by coextrusion a laminate structured of, in sequence, a first polyamide layer, an EVOH layer, and a second polyamide layer, and (b) longitudinally stretching the laminate and (c) applying by vacuum vapor deposition to one of the surfaces of the stretched laminate an inorganic layer.Type: GrantFiled: January 24, 2001Date of Patent: April 29, 2003Assignee: Wolff Walsrode AGInventors: Antoine Cassel, Rainer Brandt, Gregor Kaschel
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Patent number: 6548154Abstract: A bias transfer member or bias charging member for a xerographic device includes a support substrate, and a multi-layer conductive surface coating over the support substrate. The multi-layer coating includes a base layer of metal-containing particles in a polymer binder, an intermediate layer of conductive particles in a polymer binder, and a top layer of conductive particles in a polymer binder, wherein the amount of the conductive particles in the top layer is greater than the amount of the conductive particles in the intermediate layer. The multi-layer coating exhibits ideal electrical and abrasion resistance performance for use in bias charging or transfer members.Type: GrantFiled: November 28, 2000Date of Patent: April 15, 2003Assignee: Xerox CorporationInventors: Donald S. Stanton, Bing R. Hsieh, Allen J. Thompson, Yuan Yu, William H. Wayman, Michelle L. Schlafer, Heiko Rommelmann, Ann M. Kazakos, Alan R. Kuntz
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Publication number: 20030059593Abstract: A composite film is provided by providing a polypropylene or other base resin layer, laminating a first covering layer of a resin composition (1) comprising the following components (A), (B), (C) and (D) to one side of the base resin layer and a second covering layer of a resin composition (2) comprising the components (A) and (D) to the other side of the base resin layer, which composite film is optionally stretched. The resin composition (2) may contain component (C).Type: ApplicationFiled: July 11, 2002Publication date: March 27, 2003Inventors: Takatoshi Sakaguchi, Junichi Kimura, Teruaki Yoshida
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Patent number: 6524671Abstract: Coextruded layers of polyamide and fluoropolymer adhere to one another without an intervening tie layer by adhesive activation of polyamide of the polyamide layer, e.g. by incorporating into the polyamide layer a dispersed phase of maleic anhydride-grafted ethylene/propylene/diene copolymer. The fluoropolymer is a copolymer of ethylene with perhalogenated comonomer or a copolymer of tetrafluoroethylene with perfluorinated comonomer.Type: GrantFiled: March 12, 1998Date of Patent: February 25, 2003Assignee: E. I. du Pont de Nemours and CompanyInventor: Peter Dwight Spohn
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Publication number: 20030035946Abstract: The present invention provides a cover tape for packaging electronic components, which can prevent troubles associated with the peeling strength or appearing during mounting of the electronic components, which can be produced at a low cost, and which is transparent; that is, a cover tape which has a peeling strength not too high and not too low and small in difference between the maximum value and the minimum value and which has high transparency. Specifically, the present invention provides a cover tape for packaging electronic components, which can be heat-sealed to a plastic-made carrier tape having pockets capable of storing electronic components, formed regularly therein and which comprises (A) a biaxially oriented film layer made of a polyester, a polypropylene or a nylon and (B) a thermoplastic resin layer composed of 100 parts by weight of an ethylene copolymer and 10 to 100 parts by weight of a polystyrene, laminated to one side of the layer A.Type: ApplicationFiled: June 26, 2002Publication date: February 20, 2003Inventors: Hisao Nakanishi, Masayuki Hiramatsu
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Patent number: 6517920Abstract: A multilayered, coextruded tubular biaxially stretched casing, having oxygen and water vapor barrier properties plus reduced adhesion to contents, e.g., foodstuffs, contained within the casing, is disclosed. The tubular casing has five layers in the order of A|B|C|D|E. Outer layer A, contains as its principal component at least one polyamide. Layer B has oxygen barrier properties, and may be composed of a substantially hydrolyzed copolymer of ethylene and vinyl acetate. The core layer C contains as its principal component at least one polyamide. Layer D contains a modified polyolefin. Inner layer E (i.e., the layer that is in contact with the contents of the tubular casing) is a water vapor barrier layer, that contains as its principal component at least one member selected from the group consisting of homopolyolefin and copolyolefin. The tubular casing is useful for encasing foodstuffs, such as pasty or liquid foodstuffs.Type: GrantFiled: September 11, 2000Date of Patent: February 11, 2003Assignee: Wolff Walsrode AGInventors: Nils Schröder, Detlef Wolf
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Publication number: 20030026992Abstract: Using a gas barrier resin composition including 83 to 15% by mass of a compound (A) having two or more hydroxyl groups in a molecule thereof and 17 to 85% by mass of a compound (B) in which at least one carboxyl group is bound to each of three or more consecutive carbon atoms in a molecule thereof, wherein the compound (B) is any one of a compound in which no anhydrous structure is made among the carboxyl groups and a compound in which at least one anhydrous structure is made among the carboxyl groups, or using a gas barrier coating agent including the compound (A), the compound (B) and a solvent, the present invention provides a gas barrier molded material, which has high gas barrier property in that it has less reduction of gas barrier property even in a high humidity atmosphere, has excellent transparency, does not generate poisonous gas when it is subjected to an incineration treatment, is friendly to the natural environment because of the non-use of organic solvents, and has good productivity.Type: ApplicationFiled: July 19, 2002Publication date: February 6, 2003Inventors: Arihiro Anada, Shoji Okamoto, Kenjin Shiba, Hayami Onishi
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Publication number: 20030026996Abstract: A fluorine-containing adhesive comprising a fluorine-containing ethylenic polymer (A) having functional group which has a crystalline melting point or glass transition temperature of not more than 270° C. and is prepared by copolymerizing (a) 0.05 to 30% by mole of at least one of fluorine-containing ethylenic monomers having at least one functional group selected from the group consisting of carboxyl and a carboxylic salt group and (b) 70 to 99.95% by mole of at least one of fluorine-containing ethylenic monomers which do not have the above-mentioned functional group and is copolymerizable with the component (a). To provide the fluorine-containing adhesive maintaining chemical resistance, solvent resistance, weather resistance and stain-proofing property and giving direct strong adhesion particularly to a substrate of metal, glass, resin, etc. and an adhesive film and laminated article which are produced from the fluorine-containing adhesive.Type: ApplicationFiled: July 8, 2002Publication date: February 6, 2003Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takayuki Araki, Shigehito Sagisaka, Yoshito Tanaka, Masahiro Kumegawa
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Patent number: 6511688Abstract: A packaged article, especially a respiring foodstuff such as cheese which generates or releases gas during storage, and a permeable multilayer biaxially oriented film suitable for allowing escape of such gas while minimizing transfer of oxygen across the film which has a thin layer of a blend of EVOH and nylon. In a preferred embodiment the low cost film having a high permeability to CO2 and low O2 permeability is used to package cheese.Type: GrantFiled: September 10, 2001Date of Patent: January 28, 2003Assignee: Curwood, Inc.Inventors: David Nicholas Edwards, Stephen James Vicik
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Publication number: 20030017352Abstract: A coextruded, retortable film includes a core layer having an ethylene/vinyl alcohol copolymer; two intermediate layers including a polyamide; two adhesive layers including a polymeric adhesive; and two outer layers including low density polyethylene, medium density polyethylene, high density polyethylene, ethylene/alpha olefin copolymer, propylene homopolymer, and/or propylene/alpha olefin copolymer. A method of packaging a product using this film, and a package, are disclosed.Type: ApplicationFiled: March 16, 2001Publication date: January 23, 2003Inventors: Richard M. Dayrit, Steven T. Calvert, Stephen J. Schwarz, Daniel L. McKamy, Brian Rivers, Bobby Ayers
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Patent number: 6500514Abstract: The present invention relates to a film structure and a method of manufacturing the same. More specifically, the film structure may include a barrier material made from EVOH, nylon or other thermally sensitive barrier material encapsulated by a first adhesive material. The barrier material and the first adhesive material form a barrier layer and a first set of adhesive layers when coextruded. The barrier layer and the first set of adhesive layers may be coextruded at the same or a similar temperature to form a first extrudate. The extrudate may be encapsulated by or otherwise coextruded with a second adhesive material to form a second extrudate at a higher temperature than the first extrudate that then may be formed into a flat sheet via a die. The first set of adhesive layers protects the barrier layer from high temperatures and long residence times related to the coextrusion/lamination process that may degrade the barrier layer.Type: GrantFiled: August 29, 2000Date of Patent: December 31, 2002Assignee: Pechiney Emballage Flexible EuropeInventors: Robert J. Blemberg, Gregory L. Petkovsek, Chad M. Perre
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Publication number: 20020168512Abstract: The present invention relates to a multi-ply, asymmetric sequence of layers (I) usable in conjunction with a substrate as a heat sealable layer, having an outer ply (b) on the heat sealable side, wherein a melt flow rate MFR of at least 0.1 g/10 min, measured to DIN ISO 1133 AT 190° C. and 2.16 kg, is measurable for the material composition forming the overall sequence of layers (I), the sequence of layers (I) has one or more plies (i1), (i2) etc. of a material composition, each of which has a higher melt flow rate MFR, measured to DIN ISO 1133 at 190° C. and 2.16 kg than the material composition forming ply (b), the sum of the weights per unit area of each of the plies (i1), (i2) etc., is at least 40%, relative to the weight per unit area of the entire sequence of layers (I).Type: ApplicationFiled: February 10, 1999Publication date: November 14, 2002Inventors: HOLGER EGGERS, RUDI KLEIN
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Patent number: 6479116Abstract: There are provided multi-layered structures comprising at least one layer that is an ethylene/alpha-olefin copolymer having a density of less than 0.916 g/cc and a melting peak temperature of greater than 118° C. The multi-layered structures comprise at least three layers. Also provided are articles of manufacture produced from the multi-layered structures such as films, containers, pouches, packages, tubing and the like.Type: GrantFiled: September 2, 1999Date of Patent: November 12, 2002Assignee: Eastman Chemical CompanyInventors: James Douglas Small, Jr., Jeffrey James Vanderbilt, Kathleen Diane Greer, James Edward Rhein
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Publication number: 20020164444Abstract: A polymeric film structure having one or more polymeric layers wherein an oxygen scavenging composition is affixed to the inside surface layer of the structure. The structure having usefulness in the packaging of foods and non-food articles wherein an oxygen free or a relative oxygen free environment is desirable for the contained article. The oxygen scavenging composition comprising a primer layer; a pigmented layer, an oxygen scavenger layer and an overcoat layer wherein each layer is applied one or more times to the polymeric film structure by a printing method preferably a flexographic printing process.Type: ApplicationFiled: March 29, 2002Publication date: November 7, 2002Inventors: Thomas F. Hunt, Deane Galloway, Daniel Miller
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Publication number: 20020155308Abstract: The present invention is directed to a biaxially oriented multi-layer film which comprises: (a) a core layer comprising a syndiotactic propylene homopolymer; and (b) at least one additional layer adjacent to the core layer comprising a polymer which is an ethylene or a propylene homopolymer, ethylene copolymer or terpolymer containing comonomers of propylene and/or butene-1. Optionally, there can be a skin layer applied to the exposed surface of the outer layer. The skin layer and/or the at least one additional layer is a polyolefin selected from the group consisting of isotactic polypropylene, polyethylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer or ethylene-propylene -butene-1 terpolymer.Type: ApplicationFiled: December 21, 2001Publication date: October 24, 2002Inventors: Michael T. Heffelfinger, Jay K. Keung, Robert G. Peet
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Publication number: 20020150763Abstract: A thermoforming multilayer film comprising successively: at least one layer chosen from layers A1 and A2, an optional layer B1, a layer B2, a layer B3, and an optional layer B4. A1 comprises a fluoropolymer A111 or a polymer A112 consisting essentially of alkyl(methyl)acrylate units or a blend of the two, layer A2 consists of ink, layer B1 comprises a fluoropolymer B111 or a polymer B112 consisting essentially of alkyl(meth)acrylate units or a blend of the two, layer B2 is based on a polyamide, layer B3 consists of polyolefin functionalized with unsaturated carboxylic anhydride and layer B4 comprises polyolefin. A process for producing the multilayer film comprising co-extrusion is described.Type: ApplicationFiled: January 22, 2002Publication date: October 17, 2002Applicant: ATOFINAInventors: David Silagy, Frank Bertoux, Phillipe Bussi, Anthony Bonnet
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Publication number: 20020136916Abstract: The present invention pertains to elastic films having at least one layer comprising a substantially random interpolymer or a blend thereof. The interpolymer comprises polymer units derived from at least C2-20 &agr;-olefin and (i) at least one vinyl aromatic monomer, or (ii) at least one aliphatic or cycloaliphatic vinyl or vinylidene monomer, or (iii) a combination of at least one aromatic vinyl monomer and at least one aliphatic or cycloaliphatic vinyl or vinylidene monomer. The interpolymer may also comprise one or more ethylenically unsaturated polymerizable monomers other than those previously mentioned. The elastic films have a recovery in the cross direction of greater than or equal to about 80% and has a recovery in the machine direction of greater than or equal to about 60%.Type: ApplicationFiled: January 25, 2002Publication date: September 26, 2002Inventors: Yunwa W. Cheung, Martin J. Guest, William R. Van Volkenburgh
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Publication number: 20020136878Abstract: The present invention relates to a laminated packaging material suitable for use especially in heat-sealable packages for liquid food, such as milk, cream and juice cartons, and to a manufacturing method of the material, and to a food package manufactured of the material. The material comprises a core of paper or cardboard, and oxygen and aroma proof barrier layers of EVOH and polyamide; it is characteristic of the invention that the EVOH layer (5) and the polyamide layer (4) are joined together directly without any intermediate adhesive layer, and that the barrier layers and the core (3) are interposed between polymeric heat-sealing layers (2, 7) on both sides of the material. The material is manufactured by extrusion so that at least the materials of the said barrier layers (4, 5) are placed against each other in a molten state and forwarded to the core (3) in one web.Type: ApplicationFiled: March 21, 2002Publication date: September 26, 2002Applicant: Enso OyInventors: Matti Salste, Tapani Penttinen, Jalliina Jarvinen, Risto Salminen, Terttu Heinonen (nee Maatta), Tuomo Kuuppo
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Patent number: 6455118Abstract: The present invention relates to a reinforced flexible pipeline for conveying an effluent, the pipeline having a sheath (2, 3) of polymer, the internal surface of which is in contact with the effluent and the external surface of which is in contact with reinforcing wires (4) when under pressure. The sheath has an internal layer (2) of polymer or copolymer with no external plasticizer and an external layer (3) of polymer possibly containing plasticizers so as to obtain given mechanical characteristics. Application of the pipeline proposed by the invention for conveying an effluent under pressure and at high temperature.Type: GrantFiled: December 10, 1998Date of Patent: September 24, 2002Assignee: Institut Francais du PetroleInventors: Bernard Dewimille, Jean Hardy, Jacques Jarrin, Alain Driancourt
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Publication number: 20020122952Abstract: An oriented multilayer film comprises:Type: ApplicationFiled: July 8, 1999Publication date: September 5, 2002Inventors: JOHN P. DELISIO, LYLE J. HARLEY, JAY K. KEUNG, ROBERT G. PEET
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Publication number: 20020119319Abstract: A fluorine-containing copolymer containing polymer units (A) based on tetrafluoroethylene or chlorotrifluoroethylene, polymer units (B) based on ethylene, polymer units (C) based on vinyl acetate and polymer units (D) based on a compound represented by the general formula CH2═CX(CF2)nY wherein each of X and Y which are independent of each other, is a hydrogen atom or a fluorine atom, and n is an integer of from 2 to 10, wherein (A)/(B) is from 20/80 to 80/20 in a molar ratio, (C)/((A)+(B)) is from 1/1,000 to 15/100 in a molar ratio, (D)/((A)+(B)) is from 1/1,000 to 15/100 in a molar ratio, and the volumetric rate of flow is from 1 to 1,000 mm3/sec.Type: ApplicationFiled: February 11, 2002Publication date: August 29, 2002Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Atsushi Funaki, Kazuo Hamazaki, Hajime Katayama, Eiichi Nishi, Masahide Yodogawa, Junko Asakura
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Patent number: 6440546Abstract: The flexible, weatherable decorative sheet material provided by the present invention comprises a thermoformable decorative paint film having an inner surface and a weatherable, low gloss outer surface suitable for forming an exterior finish for a part, such as an automobile body part. The sheet material further includes an extensible mask layer releasably adhered to the outer surface of the paint film to form a protective film overlying the paint film. The mask layer comprises a film-forming polymer component and a particulate filler, such as silica, dispersed in the polymer component. A method of constructing the decorative sheet material, a method of controlling the gloss appearance of a paint film, and a composite shaped part including the decorative sheet material are also provided.Type: GrantFiled: October 13, 1999Date of Patent: August 27, 2002Assignee: Ream Industries Corp.Inventors: Thomas Randall Fields, Scott William Huffer
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Patent number: 6440566Abstract: This invention relates to a method for molding or curing a resin material using a multilayer release film as a barrier at the surface of the resin material. In one embodiment, the method comprises the surface of the resin material being in contact with the release film at a temperature of at least about 350° F. (about 180° C.). Here, the release film is non-oriented and comprises: (1) an enhancement layer which comprises a thermoplastic material; and (2) a first release layer which has a composition that is different from the enhancement layer, comprises a polymeric material, and is releasable from the resin material after the resin material is molded or cured. This invention also relates to a release film that may be used, for example, with the above method.Type: GrantFiled: October 1, 1999Date of Patent: August 27, 2002Assignee: Airtech International, Inc.Inventors: John Maligie, Thomas Malter
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Patent number: 6436547Abstract: The invention relates to a laminated packaging material comprising a core layer of paper or paperboard and a gas barrier layer of a polyarmide blend including a condensation polymer of metaxylene diamine and adipic acid (Nylon-MXD6) and a second crystalline or semicrystalline polyamide, applied on one side of the core layer by means of co-extrusion coating. The invention also relates to a method of producing the laminated packaging material and to a packaging container which is produced from the laminated packaging material.Type: GrantFiled: November 17, 2000Date of Patent: August 20, 2002Assignee: Tetra Laval Holdings & Finance S.A.Inventors: Nils Toft, Ion Postoaca
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Patent number: 6432548Abstract: The invention relates to compositions containing a polyamide matrix (A) and a polyolefin dispersed phase (B), in which compositions the polyamide has a melting point below that of PA-6 and the dispersed phase consists of at least one polyolefin (B) chosen from functionalized polyolefins (B1) and non-functionalized polyolefins (B2). Advantageously, (A) is PA-6/12 or PA-6/6,6. These compositions are useful for making monolayer or multilayer films by extrusion with EVA or PE.Type: GrantFiled: June 2, 2000Date of Patent: August 13, 2002Assignee: AtofinaInventors: Patrick Alex, Jean-Jacques Flat, Philippe Blondel, Gérard Reignier
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Publication number: 20020103284Abstract: A resin composition comprising (a) 100 parts by weight of a thermoplastic resin containing nitrogen atom(s) in structural units thereof; and (b) 0.1 to 20 parts by weight of an iron compound catalyst comprising at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a specific oxidation activity.Type: ApplicationFiled: February 5, 2002Publication date: August 1, 2002Inventors: Suminori Tanaka, Toshiaki Shimuzu, Toshiki Matsui, Tomoyuki Imai
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Patent number: 6420003Abstract: A thermoplastic container or packaging material is given low oxygen permeability by coating with a crosslinked acrylate layer and a layer of oxygen barrier material deposited over the acrylate layer. Another acrylate layer may be deposited over the oxygen barrier. The oxygen barrier is selected from the group consisting of silicon oxide, aluminum oxide and metal. The acrylate layer may be formed from a photopolymerizable polyfunctional acrylate that is sufficiently low viscosity to be sprayed on the substrate or applied by dipping. Alternatively, the acrylate layer is a polymerization product of an acrylate monomer which is evaporated in a vacuum, condensed on the substrate and polymerized by irradiation by ultraviolet or an electron beam.Type: GrantFiled: December 20, 2000Date of Patent: July 16, 2002Assignee: 3M Innovative Properties CompanyInventors: David G. Shaw, Eric Dawson, Daniel Cline, Marc Langlois
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Patent number: 6416832Abstract: The invention provides a single-layer or multi-layer packaging film or sheet having at least one layer formed of a polyamide resin composition, wherein the layer formed of the polyamide resin composition is a layer (A) formed of a polyamide resin composition comprising a copolymer nylon (c) composed of an aliphatic nylon (co)polymer component (1) and an aromatic nylon (co)polymer component (2) in a proportion of at least 5 wt. %.Type: GrantFiled: June 22, 1999Date of Patent: July 9, 2002Assignee: Kureha Kagaku Kogyo K.K.Inventors: Tsutomu Uehara, Hitoshi Ishii, Hajime Tsukamoto
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Patent number: 6413644Abstract: A sealing film and a method of sealing the film to glass is disclosed. The film comprises a layer of ethylene vinyl alcohol (EVOH) or a laminate comprising an outermost ethylene vinyl alcohol (EVOH) layer for adhering to a glass surface, particularly the rim of a glass container, using heat and pressure. The laminate may include in addition to the EVOH layer an adhesive layer, polymeric layer, optional adhesive layer and stock layer. The film has excellent adhesive properties, is food safe and is suitable as a sealing material.Type: GrantFiled: March 3, 1997Date of Patent: July 2, 2002Assignee: R.J. Reynolds Tobacco CompanyInventor: Charles Ray Ashcraft
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Patent number: 6414089Abstract: A method of manufacturing a polymer film having second order non-linear optical properties which has excellent stability of orientated molecules and does not become disorientated, and a polymer film and a non-linear optical element are provided. A polymer solution is placed between two substrates, which are disposed substantially perpendicular with respect to a rotating stand and substantially symmetrical with respect to a rotation axis of the rotating stand, and the rotating stand is rotated. A polymer film having second order non-linear optical properties is formed by the centrifugal force generated at the polymer solution.Type: GrantFiled: August 29, 2000Date of Patent: July 2, 2002Assignees: Riken, Japan Science and Technology CorporationInventors: Hiromi Kimura-Suda, Hiroyuki Sasabe, Tatsuo Wada
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Publication number: 20020068166Abstract: A reversibly thermochromic light-transmitting laminate member which has a satisfactory thermochromic function and undergoes alternate color changes between a colorless transparent state and a colored transparent state.Type: ApplicationFiled: December 3, 2001Publication date: June 6, 2002Applicant: THE PILOT INK CO., LTD.Inventors: Kuniyuki Senga, Jun Sugai, Shigehiro Koide
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Publication number: 20020068182Abstract: Structures of the present invention contain a non-oriented multilayer film with a polyolefin core having 40 weight-percent or less homogeneous ethylene/alpha-olefin, a modified polyolefin tie layer on each side of the core, and an adhesive layer on at least one tie layer. The adhesive layer contains a polar-modified polyolefin and a polyester, copolyester, or polyester/copolyester blend. The multilayer film has utility as a protective coating for metal surfaces.Type: ApplicationFiled: September 29, 2001Publication date: June 6, 2002Inventors: Robert H. Kelch, Robert L. McGee
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Publication number: 20020061412Abstract: A polyamide resin-based heat-shrinkable multilayer film is caused to satisfy various properties required of a packaging material, especially a food packaging material, at high levels, and particularly exhibit a highest level of heat-shrinkability. The multilayer film comprises at least three layers including an outer surface layer (a) which comprises a polyester resin or a polyolefin resin; an intermediate layer (b) which comprises a mixture of 85-60 wt. % of an aliphatic polyamide resin, and 15-40 wt. % of an aromatic copolyamide resin which is a copolymer of aliphatic diamine/isophthalic acid and aliphatic diamine/terephthalic acid, and an inner surface layer (c) which essentially comprises a copolymer of ethylene and &agr;-olefin having a density below 0.915. The heat-shrinkable multilayer film has been biaxially stretched and then heat-treated to have hot-water shrinkabilities at 80° C.Type: ApplicationFiled: September 26, 2001Publication date: May 23, 2002Inventors: Takahisa Ueyama, Tadayoshi Itoh
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Publication number: 20020055006Abstract: Decorative ionomeric surfaced film and sheet (e.g., multilayer co-extruded polymer) and articles made therefrom (e.g., automotive panels and parts) exhibiting good weatherability, mar resistance, and surface appearance of a high quality automotive finish (including color, haze, gloss, and DOI) and economical process for making (e.g., co-extrusion) and using (e.g., thermoforming and injection backfilling) the same.Type: ApplicationFiled: April 12, 2001Publication date: May 9, 2002Inventors: Randall Allen Vogel, I Hwa Lee, Sumita Sanjeevi Ranganathan
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Publication number: 20020051891Abstract: Described are structures comprising, successively: a first layer of high density polyethylene (HDPE), a layer of binder, a second layer of EVOH or of a mixture based on EVOH, optionally a third layer of polyamide (A) or of a mixture of polyamide (A) and polyolefin (B). Also described are devices for transferring or storing fluids and more particularly tubes, tanks, chutes, bottles and containers consisting of the above structure and in which the barrier layer (the second or the combination of the second and the third layer) is in direct contact with the fluid contained or transported.Type: ApplicationFiled: February 6, 2001Publication date: May 2, 2002Applicant: ELF ATOCHEM S.A.Inventors: Christophe Le Roy, Joachim Merziger, Jerome Pascal
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Patent number: 6372317Abstract: A barrier laminate useful for the formation of orange juice and citrus beverage cartons is provided. The laminate provides a skin coat of a MDPE which provides a barrier to water vapor transmission through the laminate. The reduced water vapor flow decreases the bulge rate of the resulting carton.Type: GrantFiled: November 30, 1999Date of Patent: April 16, 2002Assignee: Blue Ridge Paper Products Inc.Inventors: Alan W. Denney, Linnea Brady Keen
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Publication number: 20020041971Abstract: This invention concerns a multilayer film useful as release sheet for sheet molding compounds, comprising a first skin layer, a second skin layer, a barrier layer for monomeric resins wherein the barrier layer is between the first and second skin layers and the first and second skin layers comprise a mixture of polyolefin and adhesive resin. This invention also pertains to the multilayer films method of production, as well as an SMC sheet employing the multilayer film.Type: ApplicationFiled: September 27, 1999Publication date: April 11, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventors: DANIEL G. DENEHY, ERIC D. TUTTLE
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Patent number: 6365248Abstract: A laminated barrier film which is harmless to the environment and combines the property of being easily tearable with moderate barrier properties. The laminated film comprises: an easily tearable barrier film (19) which is made up of a first layer (23) to a third layer (25), has undergone stretching in a stretch ratio of 2.8 or higher in each of the machine and transverse directions, and has undergone thermal fixing by heat treatment at 120 to 195° C. so that it has a shrinkage of 15 to 40% through 20-minutes immersion in pressurized 120° C. water; and a sealant film (21) laminated to the film (19). The first layer (23) and the third layer (25) each contains 60 to 85 parts by weight of Ny6, 15 to 40 parts by weight of MXD6, and 0.1 to 10 parts by weight of a modifier, while the second layer (24) contains 0 to 40 parts by weight of a thermoplastic resin such as Ny6, 60 to 95 parts by weight of MXD6, and 0.1 to 10 parts by weight of a modifier.Type: GrantFiled: March 14, 2000Date of Patent: April 2, 2002Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Takeo Hayashi, Masao Takashige
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Publication number: 20020034622Abstract: A packaged article, especially a respiring foodstuff such as cheese which generates or releases gas during storage, and a permeable multilayer biaxially oriented film suitable for allowing escape of such gas while minimizing transfer of oxygen across the film which has a thin layer of a blend of EVOH and nylon. In a preferred embodiment the low cost film having a high permeability to CO2 and low O2 permeability is used to package cheese.Type: ApplicationFiled: September 10, 2001Publication date: March 21, 2002Inventors: David Nicholas Edwards, Stephen James Vicik
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Patent number: 6358577Abstract: A multilayer structure with improved permeation for atmospheric diffusion of aromatic products wherein the structure comprises: a permeable membrane wherein said permeable membrane comprises at least two polymeric layers wherein the polymer of each layer is independently selected from the group consisting of polyethylene, very low density polyethylene, low density polyethylene, ethylene methylacrylate copolymer; a release layer wherein said release layer comprises a nylon polymer or a ethylene vinyl alcohol copolymer wherein the release layer is adhered to most inner polymeric layer of the permeable member which comprises the permeable membrane and wherein the adhesion between release layer and the adjacent layer of the polymeric permeable membrane is a relatively weak bond compared to the bond between the layers of the polymeric permeable membrane; and an impermeable membrane wherein said impermeable membrane comprises one or more layers wherein the materials which comprise the individual layers of the imperType: GrantFiled: August 17, 1998Date of Patent: March 19, 2002Assignee: Pechiney Emballage Flexible EuropeInventors: William E. Bowen, Lee J. Murray, Patricia M. McCarry
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Patent number: 6350529Abstract: A gas-impermeable elastic membrane including a co-polymeric gas-impermeable film including OH groups, positioned between two layers of a co-polymer containing blocks of polyamides and of polyesters, with a rubber coating on at least one of the two layers, as well as a method of manufacturing the membrane.Type: GrantFiled: February 17, 1998Date of Patent: February 26, 2002Assignee: Elf Atochem S.A.Inventors: Yves Germain, Jean-Luc Beal, Christophe Le Roy
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Publication number: 20020022140Abstract: A co-layer stretch blow molding preform comprises an outer plastic preform and an inner plastic preform, wherein the inner plastic preform includes an infrared energy absorbing material which is absent from the outer plastic preform.Type: ApplicationFiled: June 1, 2001Publication date: February 21, 2002Inventor: Frank E. Semersky
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Publication number: 20020022144Abstract: Herein is disclosed a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group.Type: ApplicationFiled: May 8, 2001Publication date: February 21, 2002Inventors: Hu Yang, Ta Yen Ching, Gangfeng Cai
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Patent number: 6346332Abstract: This invention relates to a laminate substrate. An exemplary embodiment comprises a paperboard layer with a heat sealable layer secured substantially adjacent to one side of the paperboard layer. A co-extruded layer is secured substantially adjacent to the other side of the paperboard layer. The co-extruded layer has five layers: a heat sealable layer secured to the paperboard layer, a first tie layer secured adjacent to the heat sealable layer, a semi-crystalline nylon layer secured adjacent to the first tie layer, a second tie layer secured adjacent to the semi-crystalline nylon layer, and a heat sealable layer secured adjacent to the second tie layer. A fourth heat sealable layer is secured adjacent to the co-extruded layer.Type: GrantFiled: July 19, 2000Date of Patent: February 12, 2002Assignee: Westvaco CorporationInventors: Kenneth John Bryden, David Hillis Hawes, Ralph Scott Peterson
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Patent number: 6346328Abstract: A composite article is provided which includes a fluoropolymer intimately bonded to a component including a substantially non-fluorinated thermoplastic having pendant phenolic groups in combination with a base. Increased adhesion is observed by a greater peel strength value between the fluoropolymer component and a non-fluorinated thermoplastic having pendant phenolic groups.Type: GrantFiled: June 10, 1999Date of Patent: February 12, 2002Assignee: Dyneon LLCInventors: Edward E. Parsonage, Attila A. Molnar, Thomas J. Blong, Robert E. Kolb
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Publication number: 20020015810Abstract: A multilayer film suitable for cook-in end use includes an outer layer that includes a homo- or co-polymer of propylene and, directly adhered to the outer layer, a layer that includes at least one of: (a) an ethylene/alkyl acrylate copolymer having a high melting point, (b) propylene/&agr;-olefin copolymer having a lower propylene mer content than the outer layer and having a high Vicat softening point, and (c) an ethylene/vinyl acetate copolymer with at least 15% vinyl acetate mer content. The film exhibits good seal strength and good adhesion between the two layers, even in areas where the film is sealed, even after the film is oriented, even when the film is subjected to the elevated temperatures involved in cook-in procedures, and even where the film is subjected to, e.g., grease from fatty foods. The film also can include one or more other layers including, for example, bulk layers, O2-barrier layers, and/or abuse layers.Type: ApplicationFiled: August 3, 2001Publication date: February 7, 2002Inventors: Graham Richard Piper, Ram Kumar Ramesh
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Patent number: 6342282Abstract: The invention provides a heat-shrinkable multi-layer film comprising at least a thermoplastic resin layer as the outermost layer (A), a gas barrier resin layer as a core layer (B) and a sealing resin layer as the innermost layer (C), and optionally an adhesive layer between the individual layers, wherein (1) the sealing resin layer of the innermost layer (C) is a layer formed of a resin material (b) comprising a linear ethylene-1-octene copolymer (a) obtained by using a constrained geometry catalyst and having an 1-octene content not lower than 1 wt. % but lower than 20 wt. % and a density higher than 0.885 g/cm3 but not higher than 0.960 g/cm3, and (2) an intermediate layer (D1) formed of at least one resin (c) selected from the group consisting of polyamide resins, thermoplastic polyester resins and ethylene copolymer resins is provided between the outermost layer (A) and the core layer (B). The film has excellent sealing properties, clarity, mechanical strength, stretchability and bag-making property.Type: GrantFiled: May 11, 2000Date of Patent: January 29, 2002Assignee: Kureha Kagaku Kogyo K.K.Inventors: Junji Yoshii, Hajime Tsukamoto, Yoshihiro Matsukura, Hisanori Tobita
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Patent number: 6333061Abstract: A sealed article comprising a multilayer film having at least 4 layers. The first layer is an inside layer comprising ethylene/alpha-olefin copolymer and/or polystyrene. The second layer comprises ethylene/unsaturated ester copolymer, anhydride-modified ethylene/alpha-olefin copolymer, anhydride-modified ethylene/ester copolymer, acid-modified ethylene/alpha-olefin copolymer, and/or acid-modified ethylene/acid copolymer. The third layer comprises ethylene/alpha-olefin copolymer and/or polystyrene. The fourth layer comprises ethylene homopolymer, ethylene/alpha-olefin copolymer, ethylene/vinyl alcohol copolymer, polyvinylidene chloride, polyamide, polyester, polyalkylene carbonate, polyacrylonitrile, and/or ethylene/unsaturated ester copolymer. At least 85 volume percent of the film is made up of polyolefin homopolymer, polyolefin copolymer, ethylene/ester copolymer, polystyrene, styrene/butadiene copolymer, EVOH, PVDC, and polyacrylonitirile.Type: GrantFiled: November 14, 1997Date of Patent: December 25, 2001Assignee: Cryovac, Inc.Inventor: Parimal M. Vadhar
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Patent number: RE38087Abstract: The fuel hose of this invention is a fuel hose comprising a tubular fluororesin inner ply and, as laminated onto the peripheral surface thereof, a thermoplastic resin or rubber outer ply, the tubular fluororesin inner ply having been molded from a fluororesin with an F/C ratio, i.e. ratio of the number of fluorine atoms (F) to the number of carbon atoms (C), of not greater than 1.6 and the peripheral surface layer of the fluororesin inner ply having been modified into the following treated layer (A). (A) a layer with a distribution of oxygen atoms and having an F/C ratio, i.e. ratio of the number of fluorine atoms (F) to the number of carbon atoms (C), of not greater than 1.12 and an O/C ratio, i.e. ratio of the number of oxygen atoms (O) to the number of carbon atoms (C), of not less than 0.08.Type: GrantFiled: February 16, 2000Date of Patent: April 22, 2003Assignee: Tokai Rubber Industries, Ltd.Inventors: Katsuhiko Yokoe, Kazuhiro Kato, Koyo Murakami, Eiichi Daikai, Hiroaki Ito