Contains Vapor Or Gas Barrier, Polymer Derived From Vinyl Chloride Or Vinylidene Chloride, Or Polymer Containing A Vinyl Alcohol Unit Patents (Class 428/35.4)
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Publication number: 20080138549Abstract: [Problem] To provide an oxygen-absorbing multilayer film which exhibits high oxygen-absorbability without the addition of a transition metal salt usually added as a catalyst for the purpose of enhancing oxygen-absorbability and which does not cause a problem of odors even after absorbing oxygen, a packaging material comprising the multilayer film, and a packaging container obtained by molding this packaging material. [Means for Dissolution] An oxygen-absorbing multilayer film having a thickness of less than 250 ?m that comprises a gas barrier material layer, an oxygen-absorbent layer and a sealing material layer laminated in this order, wherein an oxygen-absorbent constituting the subject oxygen-absorbent layer comprises a cyclized product of a conjugated diene polymer as the major component. There are also disclosed a packaging material comprising this multilayer film and a packaging container obtained by molding this packaging material.Type: ApplicationFiled: December 22, 2005Publication date: June 12, 2008Applicant: ZEON CORPORATIONInventor: Shizuo Kitahara
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Patent number: 7381453Abstract: The present invention relates to packaging film for use in packaging of food products which may be heated whilst still packaged. In particular, the invention relates to packaging which may be hermetically sealed and, during heating, is able to allow a build up of pressure within the packaging, without the packaging exploding or bursting.Type: GrantFiled: July 23, 2002Date of Patent: June 3, 2008Assignee: International Trex, LtdInventor: Abdul Aziz Okhai
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Patent number: 7364779Abstract: A plastic, easy-opening closure for a retortable container and a method for sealing are provided. The closure includes a plastic membrane having an outer layer of polypropylene, a first tie layer, an intermediate layer formed of EVOH, a second tie layer, an inner layer formed of polypropylene, and a peel-seal layer. The peel-seal layer can be formed of high density polyethylene or polypropylene with a contaminant dispersed therein so that the closure can be easily removed from the container for opening.Type: GrantFiled: September 2, 2003Date of Patent: April 29, 2008Assignee: Sonoco Development, Inc.Inventor: Srinivas Nomula
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Patent number: 7341769Abstract: A laminated fabric of an elastomeric copolyetherester-based film laminated to a manmade fiber substrate fabric and having a stiffness of from about 5 to 80 Newtons measured according to test method ASTM D4032-94 is described which demonstrates a desirable combination of stiffness and foldability, non-blocking (non self-sticking), air impermeability and resistance to heat aging.Type: GrantFiled: February 25, 2003Date of Patent: March 11, 2008Assignee: Invista North America S.A R.L.Inventor: John Barnes
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Patent number: 7279206Abstract: Film laminates for packaging applications having at least two polymer layers which are formed together as a coextruded blown film such that the first polymer layer is a surface layer relative to the film and comprises a heat-sealable material having a melt index of at least 20 g/10 min. The first polymer layer of the coextruded film has a thickness A and the film has a total thickness B, such that the relative values of A and B satisfy the relationship A/B?0.3. The present invention further provides food packages formed from these film laminates.Type: GrantFiled: March 22, 2005Date of Patent: October 9, 2007Assignee: Curwood, Inc.Inventors: Andrea M. Schell, Christopher J. Harvey
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Patent number: 7264884Abstract: A stretch film presenting controlled permeability to gases, manufactured by process of balloon co-extrusion and consisting of outer layers (S2) of stretchable polmeric material and by one or two inner barrier layers (S3) of a EVOH based polymeric matrix, which is made stretchable by the addition of a suitable plasticizer in such a percentage as to conciliate the stretchablity with the desired barrier effect, said layers of different material being reciprocally secured by means of layers (S4) of adhesive material. The polymeric matrix which forms the barrier material and the plasticizer are intimately mixed inside a double-screw corotating extruder, immediately before the phase of co-extrusion, through a premelting of the polymeric matrix and the subsequent injection of the plasticizer in liquid phase.Type: GrantFiled: December 21, 2001Date of Patent: September 4, 2007Assignee: A.W.A.X. Progettazione e RicercaInventors: Renato Rimondi, Angelo Cappi, Carlo Nicoletti
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Patent number: 7261927Abstract: The present invention relates to an airbag cushion which exhibits a low amount of seam usage (in order to attach at least two fabric panels or portions of a panel together) in correlation to an overall high amount of available inflation airspace within the cushion itself. These correlated elements are now combined for the first time in what is defined as an effective seam usage index (being the quotient of the length of overall seams on the cushions and the available inflation airspace volume). The inventive cushion must have at least one substantially straight seam and must possess an effective seam usage factor of less than about 0.11. A cushion exhibiting such a low seam usage factor and also comprising an integrated looped pocket for the disposition of an inflator can is also provided as well as an overall vehicle restraint system comprising the inventive airbag cushion.Type: GrantFiled: September 17, 2001Date of Patent: August 28, 2007Assignee: Milliken & CompanyInventor: Ramesh Keshavaraj
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Patent number: 7241481Abstract: An article, such as a polymeric film, sachet, purge control pad, or label, includes a sulfur scavenger. In some embodiments, an oxygen scavenger is also included. A method includes providing an article, including a sulfur scavenger and an oxygen scavenger; and subjecting the article to a dosage of actinic radiation effective to trigger the oxygen scavenger. A method of reducing the sulfur content of a package containing a food product includes either (1) providing a film including a layer including a zinc ionomer, and a layer including an oxygen scavenger; packaging the food product in the film; and storing the package for at least 24 hours; or (2) providing the food product at a temperature of ?40° F.; providing a film including a layer including a sulfur scavenger; packaging the food product in the film; and storing the package for at least 24 hours.Type: GrantFiled: June 25, 2004Date of Patent: July 10, 2007Assignee: Cryovac, Inc.Inventors: Drew V. Speer, Cynthia L. Ebner, Michael D. Grah
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Patent number: 7214415Abstract: Monolayer packages comprised of an oxygen scavenging composition suitable for direct contact with package contents and recycle with other polyester bottles are disclosed. The oxygen scavenging composition is comprised of a modified copolymer which is comprised of predominantly polyester segments and an oxygen scavenging amount of oxygen scavenging segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. Use of these oxygen scavenging copolymers in bottles provides a clear and rigid monolayer bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolymers of this invention are over 99 wt % PET and contain less than 50 ppb of extractable components.Type: GrantFiled: February 8, 2005Date of Patent: May 8, 2007Assignee: BP Corporation North America Inc.Inventors: James M. Tibbitt, Paul J. Cahill, George E. Rotter, David P. Sinclair, Gary T. Brooks, Raymond T. Behrends
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Patent number: 7169860Abstract: Biodegradable block copolyesters obtained from crystalline blocks and amorphous blocks, wherein the repeating units of both blocks are of the dicarboxylic acid/diol type. Said copolyesters are characterized by a melting temperature equal to or less than 15% lower than the starting crystalline polymer temperature, and by increased tenacity that makes them particularly useful in the production of different types of objects.Type: GrantFiled: October 19, 2004Date of Patent: January 30, 2007Assignee: Novamont S.p.A.Inventors: Catia Bastioli, Giandomencio Cella, Tiziana Milizia
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Patent number: 7169453Abstract: 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: GrantFiled: February 6, 2001Date of Patent: January 30, 2007Assignee: Arkema FranceInventors: Christophe Le Roy, Joachim Merziger, Jerome Pascal
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Patent number: 7144619Abstract: A multi-layer thermoformable, translucent pharmaceutical and food packaging film consisting of a core layer of 100 to 1000 microns thickness of food grade poly vinyl chloride [PVC], devoid of plasticizers having vinyl monomer less than 1 ppm and a global migration of additives less than 60 ppm; and a metallized layer of thickness 0.02 to 2 microns provided at least on one side of the said core layer and at least one 0 to 250 microns thick food and pharmaceutical grade polymeric layer provided at least on one side of the core layer.Type: GrantFiled: February 3, 2004Date of Patent: December 5, 2006Inventors: Naik Praful Ramchandra, Nair A{acute over (J)}ith Sashidharan, Bhandari Mohan Harakchand, Bharadia Rahul, Tilak Ammanabrolu Balgangadhar, Itkar Sachin Chandrashekhar
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Patent number: 7112356Abstract: A high-barrier liner for a composite container that is compatible with the use of RFID devices in the container includes a paper layer having an outer surface for attachment to an inner paperboard surface of a body wall of the container, and a metallized film attached to the inner surface of the paper layer, the metallized film comprising a polymer film substrate having a vapor-deposited layer of metal applied to one surface of the substrate. The liner also includes a heat seal layer disposed on an opposite side of the metallized film from the paper layer and forming an innermost surface of the liner. The metallized film can include a metallization-promoting material coated onto the substrate prior to metallization to improve the uniformity and continuity of the metal layer. The metal layer of the metallized film can have a protective coating applied over it.Type: GrantFiled: May 11, 2004Date of Patent: September 26, 2006Assignee: Sonoco Development, Inc.Inventors: Srinivas Nomula, Thomas J. Setty
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Patent number: 7078091Abstract: The present invention relates to membranes including an urethane including a polyester polyol, wherein the membrane has a gas transmission rate of 15.0 or less for nitrogen gas wherein the membrane has an average thickness of approximately 20.0 mils. Under certain embodiments, the membranes include blends of one or more polyester polyol based thermoplastic urethanes and one or more barrier materials. The membranes can be employed in a variety of applications and can be used as either monolayers or multi-layered laminates.Type: GrantFiled: April 2, 2004Date of Patent: July 18, 2006Assignee: Nike, Inc.Inventors: Henry W Bonk, David J Goldwasser
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Patent number: 7057008Abstract: Packaging materials made from water-soluble nylons are disclosed, that readily contain materials such as caustic chemicals and upon exposure to water dissolve to provide for the release of the chemical into an aqueous environment. The materials are made from select polyether diamines and select aliphatic dicarboxylic acids.Type: GrantFiled: May 14, 2003Date of Patent: June 6, 2006Assignee: E.I. du Pont de Nemours and CompanyInventor: Rolando Umali Pagilagan
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Patent number: 7052753Abstract: Novel films, and processes for making them, are provided. The films are characterized by the inclusion of a layer of vinylidene chloride copolymer between at least two other layers which contain ethylene vinyl acetate, and optionally linear low density polyethylene. The films may be unoriented or oriented. Oriented films may optionally be cross-linked. The novel process of making the cross-linked films includes the step of cross-linking the film after assembly of the vinylidene chloride copolymer layer into the structure.Type: GrantFiled: December 22, 1989Date of Patent: May 30, 2006Assignee: Pechiney Emballage Flexible EuropeInventors: Samuel W. Tse, Almar T. Widiger, Keith D. Lind
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Patent number: 7041351Abstract: Novel films, and processes for making them, are provided. The films are characterized by the inclusion of a layer of vinylidene chloride copolymer between at least two other layers which contain ethylene vinyl acetate, and optionally linear low density polyethylene. The films may be unoriented or oriented. Oriented films may optionally be cross-linked. The novel process of making the cross-linked films includes the step of cross-linking the film after assembly of the vinylidene chloride copolymer layer into the structure.Type: GrantFiled: June 22, 1989Date of Patent: May 9, 2006Assignee: Pechiney Emballage Flexible EuropeInventors: Samuel W. Tse, Almar T. Widiger, Keith D. Lind, James Musselman
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Patent number: 7022258Abstract: Herein is disclosed an oxygen scavenging composition, comprising (i) an oxygen scavenging polymer comprising structure I: X—R—X—O—CH2—Ar—CH2—O,??(I) wherein —R— is selected from the group consisting of C1–C24 alkyl, C1–C24 substituted alkyl, C6–C24 aryl, and C6–C24 substituted aryl; —Ar— is selected from the group consisting of C6–C24 aryl and C6–C24 substituted aryl; and —X— is selected from the group consisting of null and —C(?O)—; (ii) a transition metal oxidation catalyst; and (iii) an energy-absorbing compound selected from the group consisting of microwave reactive materials and photoinitiators having a wavelength of maximum absorption of electromagnetic radiation from about 200 nm to about 750 nm. The oxygen scavenging composition can be used to form an oxygen barrier packaging article.Type: GrantFiled: February 14, 2002Date of Patent: April 4, 2006Assignee: Chevron Phillips Chemical Company, LPInventors: Hu Yang, Ta Yen Ching, Steven Woodcock
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Patent number: 6974447Abstract: The present invention provides a receptacle for a therapeutic fluid susceptible to deterioration on exposure to a gas such as oxygen or carbon dioxide. The receptacle has walls of sheet material each including at least one layer forming a barrier essentially impermeable to such gas, and a seal sealing the walls together in a region thereof. A transfer tube is sealed in the seal having a proximal end in the receptacle, a distal end accessible from outside the receptacle, a flow passage extending between said proximal and distal ends, and a closure blocking flow through the flow passage adapted to be pierced by a tubular needle for transfer of therapeutic through the needle. The transfer tube and closure are essentially impermeable to said gas.Type: GrantFiled: April 16, 2002Date of Patent: December 13, 2005Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Sidney T. Smith, Larry Rosenbaum, Gregg Nebgen, William S. Hurst, William S. Hoerle, Adel M. Sadik, Melissa J. Skelnik, Steven H. Giovanetto, Bradley Buchanan
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Patent number: 6964796Abstract: A thermoplastic resin composition containing an oxygen-absorbing agent, wherein a resin matrix of the thermoplastic resin composition is substantially non-compatible and is composed of a blend of thermoplastic resins or elastomers, and the non-compatible thermoplastic resins and elastomers are present as a non-uniformly distributed structure in the resin matrix. The packaging container or cap of this invention suppresses the lowering of flavor retention incident to the dissolving out of the oxygen absorbing agent or its oxidation product even after retorting sterilization. The preservability of the contents and flavor retention can be achieved for a long period of time. According to a preferred embodiment, the oxygen absorbing speed can be increased. After storage for a long time, or after heat sterilization, a rugged state does not occur. There can be formed the oxygen-absorbing resin composition and the packaging container having excellent outer appearance.Type: GrantFiled: May 5, 1999Date of Patent: November 15, 2005Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Masayasu Koyama, Masahito Kogure, Yasuhiro Oda, Yoshitsugu Maruhashi, Toshio Goryoda, Shogo Mukuno
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Patent number: 6960350Abstract: An antifungal fragrance composition containing as its active ingredients: (a) at least one type of fragrance component selected from the group consisting of an aliphatic or aromatic aldehyde having 5 to 16 carbon atoms and an aliphatic or aromatic alcohol having 5 to 16 carbon atoms, and (b) at least one type of compound different from component (a) and selected from the group consisting of an aliphatic or aromatic aldehyde, an aliphatic or aromatic alcohol, acetal and ester that produces synergistic antifungal effects in the presence of said fragrance component (a). The present antifungal fragrance composition demonstrates antifungal activity by adding a small amount of oils and fragrant chemical products that have a minimal effect on the scent of the fragrance composition.Type: GrantFiled: December 12, 2001Date of Patent: November 1, 2005Assignee: Takasago International CorporationInventors: Minoru Hanada, Hisao Iwai, Jun Fujigasaki
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Patent number: 6955842Abstract: A sealing medium for composite packaging materials, in particular for packaging transdermal therapeutic systems (TTS) with volatile active ingredients such as nicotine, is characterized in that it is a heat sealing lacquer which is in the form of a liquid phase for application of extremely thin sealing layers in the printing process for example to partial areas of composite packaging materials.Type: GrantFiled: October 10, 1997Date of Patent: October 18, 2005Assignee: LTS Lohmann Therapie-Systeme AGInventors: Reinhard Koch, Frank Müller, Jorgen Friies
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Patent number: 6942908Abstract: A multilayered packaging film having good antifog performance that is suitable for use in food packaging. The multilayered film comprises a nylon film having first and second surfaces; a sealant film positioned on the first surface of the nylon film, either directly on the first surface of the nylon film or via an intermediate adhesive; an antifog composition contained within at least part of the sealant film or coated on a surface of the sealant film opposite the nylon film; and a protective film applied onto the second surface of the nylon film.Type: GrantFiled: March 29, 2004Date of Patent: September 13, 2005Assignee: Honeywell International Inc.Inventor: Simon J. Porter
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Patent number: 6926951Abstract: A laminate for gum packaging is defined. The laminate includes a metal layer, a polymer layer, a paper layer, and an electron beam cured coating. The laminate provides as good or better barrier properties as a conventional laminate for gum packaging. However, the laminate has “reacted-in” slip agents in the electron beam cured coating, thereby avoiding the common problems of slip agent migration. Further, the laminate of the invention is more economical to produce than is the conventional laminate.Type: GrantFiled: April 4, 2001Date of Patent: August 9, 2005Assignee: Sonoco Development, Inc.Inventors: Scott W. Huffer, Jeffrey M. Schuetz, Don McArthur
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Patent number: 6908652Abstract: An article of manufacture includes an oxygen scavenger and poly(lactic acid). The article can be in the form of a film, coating, gasket, liner, insert, sealant, or fibrous matte. A film includes at least one layer including an oxygen scavenger, and at least one layer including poly(lactic acid). A package can be made from the film for enclosing an oxygen-sensitive artice such as food. The poly(lactic acid) blocks the migration of odor causing byproducts of the oxygen scavenging process. A method includes providing a film including at least one layer including an oxygen scavenger; and at least one layer including the poly(lactic acid); and exposing the film to actinic radiation. A method for reducing migration of organoleptically significant compounds is also disclosed.Type: GrantFiled: September 18, 1997Date of Patent: June 21, 2005Assignee: Cryovac, Inc.Inventors: Nathanael R. Miranda, Drew V. Speer
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Patent number: 6886304Abstract: The invention concerns a product and the relative manufacturing process, said product, including at least a precast support (2) of expanded material and at least a layer (3) of agglomerated stone material in form of granulates bound by a binding phase, over at least one surface of said expanded support (2). According to suitability, the product (1) is made by a sandwich structure with an intermediate layer of expanded material and two surface coatings of stone material. The product (1) can also have a complex or modular shape, from which it is possible to cut and eventually to work finished pieces of predetermined dimensions. The main advantage of the invention consists in obtaining a finished product (1, 10, 100) lighter than a product made of agglomerated stones homogeneous in the thickness.Type: GrantFiled: August 22, 2000Date of Patent: May 3, 2005Assignee: Quarella S.p.A.Inventors: Alessandro Godi, Pierpaolo Tassone
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Patent number: 6869686Abstract: A multi-layer packaging film is provided having at least four layers arranged in sequence comprising: (1) a heat-sealing first layer comprising at least 50% by weight of a copolymer of propene, and at least one ?-olefin selected from the group consisting of ethylene, butene-1, methylpentene-1, hexene-1, octene-1, decene-1 and mixtures thereof, said copolymer having a propene content of at least 60 wt. %, a Tm between about 100° C. and about 145° C., a Mw/Mn of between 1 and 5, and n-hexane extractables of less than 4 wt. %; (2) second and fourth layers each comprising (a) at least 10 wt. % of a first copolymer of ethylene and at least one C4-C8 ?-olefin, said copolymer having a density of from 0.900 to 0.915 g/cm3 and a melt index of less than 2 dg/min., (b) at least 10 wt. % of a second copolymer of ethylene with from 4 to 18 wt. % of a vinyl ester, alkyl acrylate, acrylic or methacrylic acid, and (c) from 0 to 60 wt.Type: GrantFiled: August 30, 2000Date of Patent: March 22, 2005Assignee: Curwood, Inc.Inventor: Scott A. Idlas
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Patent number: 6866907Abstract: The present invention provides a packaging material of single multi-layer type including at least one layer of plastic having improved light barrier properties, and which layer of plastic includes particles of carbon black and wherein the plastic layer containing the carbon black further includes mineral particles substantially uniformly distributed within the plastic material of that layer in a quantity between about 3% and 80% of the total weight of the layer. The packaging materials have superior light barrier properties over similar materials in the art, and can be used to enhance the packaging and storage of light-sensitive food products.Type: GrantFiled: May 18, 1999Date of Patent: March 15, 2005Assignee: Tetra Laval Holdings & Finance S.A.Inventors: Lars Bergholts, Lotta Klint
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Patent number: 6858275Abstract: An irradiated multilayer film has a first layer and a second layer. The first layer is an outer heat seal layer containing a blend of a highly branched homogeneous polymer and a semicrystalline polymer. The highly branched homogeneous polymer has at least 40 branches per 1000 methylene groups, an Mw/Mn less than 3.0, and a density of less than 0.89 g/cc. The highly branched homogeneous polymer is present in an amount of from about 1 to 50 weight percent, based on layer weight. The semicrystalline polyolefin has a density of at least 0.90 g/cc. The semicrystalline polyolefin is present in an amount of from about 60 to 99 weight percent, based on total layer weight. The second layer contains a thermoplastic polymer in a crosslinked polymer network. A process for making a packaging article includes coextruding the first and second layers, irradiating the resulting multilayer film, and thereafter heat sealing the first layer to itself or another component of the packaging article.Type: GrantFiled: April 17, 2003Date of Patent: February 22, 2005Assignee: Cryovac, Inc.Inventors: Isabella Ferri, Slawomir Opuszko, Nathanael Rustia Miranda
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Patent number: 6845599Abstract: A multi-layer packaging laminate is produced by simultaneously applying at least two wet coating layers to a substrate web (10) in a slide coater or curtain coater having a slide block (14) over which laminar flow streams of coating liquid flow to reach the substrate web. At least one layer is less than 20 ?m thick (wet) and at least one layer has oxygen barrier or scavenger properties.Type: GrantFiled: January 25, 2001Date of Patent: January 25, 2005Assignee: Tetra Laval Holdings & Finance SAInventors: Mikael Berlin, Mats Bentmar, Katarina Flemmer
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Patent number: 6846532Abstract: A laminate packaging material for use with food products, and a retortable pouch comprising that material, are disclosed. The laminate material includes an outer polyethylene terephthalate layer, a nylon second layer, and a polypropylene inner layer. A solventless adhesive is used to bond the layers together. The solventless adhesive includes surface-modified exfoliated montmorillonite clay platelets. The platelets lie generally parallel to the plane of the laminate, and overlap to form a barrier to oxygen and other volatile materials. The retortable pouch is formed by heat sealing the edges one of more sheets of the laminate such that the polypropylene layers face inward and are welded together. The pouch and its contents can then be pasteurized by heat-treatment without degradation of the laminate or the heat seal.Type: GrantFiled: February 15, 2001Date of Patent: January 25, 2005Assignee: Sonoco Development, Inc.Inventor: Francis J. Bensur
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Publication number: 20040256050Abstract: A method for making a vacuum packaging film includes flowing a plastic melt, from a multi-layer extruder, onto a rotating roller. The plastic melt is then cooled while simultaneously imparting a pattern, via a pattern imparting means, onto the plastic melt resulting in the vacuum packaging film.Type: ApplicationFiled: March 15, 2004Publication date: December 23, 2004Inventor: Hongyu Wu
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Patent number: 6818151Abstract: Oxygen barrier copolymers and methods of making the same are disclosed. The oxygen barrier copolymers comprise repeating units derived from vinylidene chloride and oxygen scavenging repeating units. The oxygen scavenging repeating units can comprise oxygen scavenging moieties that are cycloalkenyl. Oxygen barrier compositions, methods of preparing oxygen barrier compositions, and packaging articles comprising oxygen barrier copolymer are also disclosed.Type: GrantFiled: November 30, 2001Date of Patent: November 16, 2004Assignee: Chevron Phillips Chemical Company LPInventors: Hu Yang, Ta Yen Ching, Kevin Cai, Lennard Torres
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Patent number: 6818150Abstract: Disclosed herein is a method of initiating oxygen scavenging in a packaging article comprising an oxygen scavenging polymer. The method involves (i) providing the packaging article comprising the oxygen scavenging polymer, wherein the packaging article comprises an interior surface and an exterior surface; (ii) wetting the interior surface of the packaging article with a solution comprising a peroxide, to result in a packaging article with a wetted surface; and (iii) exposing the wetted surface to an initiating factor, to initiate oxygen scavenging by the packaging article. Typically, the initiating factor is ultraviolet light, heat, or both.Type: GrantFiled: December 22, 2000Date of Patent: November 16, 2004Assignees: Chevron Phillips Chemical Company LP, Elopak Systems AGInventors: M. Stephen Galland, Gary D. Jerdee, Gunnar Rysstad, Keith Johnstone
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Patent number: 6808772Abstract: The invention relates to a vapor barrier for use in the thermal insulation of buildings which can be used, in particular, for thermal insulation procedures in new buildings or in the renovation of old buildings. The vapor barrier in accordance with the invention is thereby capable of achieving water vapor exchange under different ambient conditions. This is achieved by using a material which has a water vapor diffusion resistance which is dependent on the ambient humidity and which also has adequate tensile strength and tear resistance.Type: GrantFiled: July 14, 2003Date of Patent: October 26, 2004Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.Inventors: Hartwig Kunzel, Theo Grosskinsky
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Patent number: 6783857Abstract: 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: GrantFiled: July 19, 2002Date of Patent: August 31, 2004Assignee: Unitika Ltd.Inventors: Arihiro Anada, Shoji Okamoto, Kenjin Shiba, Hayami Onishi
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Patent number: 6773775Abstract: A multilayer sealant film for use in the medical field at least comprises as its innermost layer a first layer comprising at least one resin selected from the group consisting of linear low-density polyethylene, low-density polyethylene, polypropylene and polybutene-1, and a third layer comprising an ethylene-vinyl alcohol copolymer and laminated to the outer side of the first layer with a second layer serving as an adhesive layer and comprising a resin containing, as a main component, at least one of an amorphous polyolefin, adherent polyolefin and ethylene-vinyl acetate copolymer. The ethylene-vinyl alcohol copolymer forming the third layer functions as a barrier for preventing contaminants from migrating from outside of the third layer toward the first layer (innermost layer). Further, it is possible to improve the formability of the multilayer film since the difference in density between the resin for forming the first layer and the resin for forming the second layer is set to be 0.02 g/cm3 or less.Type: GrantFiled: December 30, 2002Date of Patent: August 10, 2004Assignee: Otsuka Pharmaceutical Factory, Inc.Inventors: Fujio Inoue, Masamitsu Izumi, Shigetoshi Kashiyama
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Patent number: 6767600Abstract: A paper container is produced that has gas barrier properties, by employing a laminate having at least a (I) paper layer 101, a (II) gas barrier layer 103, and an (III) epoxy-group-containing resin composition layer 104. The (III) epoxy-group-containing resin composition layer consists of a resin composition that contains a polyolefin (a) having a melt flow rate of 0.1˜100 g/min and an epoxy-compound (b) which has two or more epoxy groups in the molecule and has a molecular weight of 3000 or less, epoxy-compound (b) being added in an amount of 0.01˜5 parts by weight with respect to 100 parts by weight of polyolefin (a). This (III) epoxy-group-containing resin composition layer has good adhesion with the (II) gas barrier layer, thus a laminate can be produced without employing a dry laminate adhesive agent or an extrusion laminate anchor agent. Accordingly, it is possible to avoid a deterioration in the work environment or an odor remaining in the final product from the use of organic solvents.Type: GrantFiled: January 24, 2001Date of Patent: July 27, 2004Assignee: Japan Polyolefins Co., Ltd.Inventor: Hiroshi Kasahara
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Patent number: 6764729Abstract: A heat-shrinkable backseamed casing film comprises a first layer, a second layer, and a third layer, with the first and third layers being outer layers and the second layer being between the first layer and the third layer. The first outer layer serves as an inside casing layer, and comprises polyolefin; the second layer comprises polyester and/or polyamide; the third layer serves as an outside casing layer and comprises polyolefin, polystyrene, and/or polyamide. The second layer has a thickness of at least about 5% of a total thickness of the heat-shrinkable casing film. Alternatively, the first layer comprises polyolefin and has a surface energy level of less than about 34 dynes/cm; the second layer comprises a polyamide having a melting point of at least 300° F.; and the third layer comprises polyolefin, polystyrene and/or polyamide. A package comprises a cooked meat product within the backseamed casing.Type: GrantFiled: January 18, 2001Date of Patent: July 20, 2004Assignee: Cryovac, Inc.Inventors: Ram K. Ramesh, Michael J. Rosinski
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Patent number: 6761965Abstract: An irradiated multilayer film has a first layer and a second layer. The first layer is an outer heat seal layer containing a blend of a highly branched homogeneous polymer and a semicrystalline polymer. The highly branched homogeneous polymer has at least 40 branches per 1000 methylene groups, an Mw/Mn less than 3.0, and a density of less than 0.89 g/cc. The highly branched homogeneous polymer is present in an amount of from about 5 to 50 weight percent, based on layer weight. The semicrystalline polyolefin has a density of at least 0.90 g/cc. The semicrystalline polyolefin is present in an amount of from about 50 to 95 weight percent, based on total layer weight. The second layer contains a thermoplastic polymer in a crosslinked polymer network. A process for making a packaging article includes coextruding the first and second layers, irradiating the resulting multilayer film, and thereafter heat sealing the first layer to itself or another component of the packaging article.Type: GrantFiled: March 25, 2002Date of Patent: July 13, 2004Assignee: Cryovac, Inc.Inventors: Isabella Ferri, Slawomir Opuszko, Nathanael Rustia Miranda
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Patent number: 6753053Abstract: The laminated film of the present invention comprises: an outermost layer (A) comprising a polybutylene terephthalate homopolymer, a polybutylene terephthalate copolymer or a mixture of the polybutylene terephthalate homopolymer and the polybutylene terephthalate copolymer; and an innermost layer (B) comprising a heat-sealing resin, the outermost layer (A) having a shape factor of not less than 2.2, which shows a peak shape of Raman spectrum thereof and is represented by the following formula (1): Shape factor=La/Lb (1) wherein La and Lb represent peak widths being present on higher- and lower-frequency sides, respectively, relative to a perpendicular line drawn from a peak top to a base line formed by a tangent line taken before and after the peak based on carbonyl stretching vibration, and being taken along a horizontal line at a height corresponding to one half of an intensity of the peak. The laminated film is prevented from being curled upon heat-sealing.Type: GrantFiled: November 15, 2001Date of Patent: June 22, 2004Assignees: Shikoku Kakoh Co., Ltd., Mitsubishi Chemical CorporationInventors: Takashi Futagawa, Katsutoshi Ohno
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Patent number: 6753370Abstract: A resin composition comprises a copolymer (A) comprising ethylene as a major component produced with a single-site catalyst, and an ethylene-vinyl alcohol copolymer (B) having an ethylene content of 20-60 mol. % and a degree of hydrolysis of 95% or above, the resin composition satisfying the equation (1): 1/99≦{weight of (A)}/{weight of (B)}≦<99/1 (1) A preferred resin composition comprises a copolymer (A) which has a density of 0.90-0.94 g/cm3 and the resin composition further comprises a carboxylic acid-modified polyolefin (C) and satisfies the equations (2) and (3): 60/40≦{weight of (A)}/{(weight of (B)}≦: 99/1 (2) 0.1/99.9≦X≦: 20/80 (3) wherein X={weight of (C)}/{total weight of (A) and (B)}. Another preferred resin composition comprises a copolymer (A) which has a density of 0.85-0.Type: GrantFiled: March 7, 2002Date of Patent: June 22, 2004Assignee: Kuraray Co., Ltd.Inventors: Shigeki Nakatsukasa, Hiroyuki Ohgi, Kazuyori Yoshimi
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Patent number: 6753054Abstract: 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: GrantFiled: November 19, 1999Date of Patent: June 22, 2004Assignee: Pechiney Emballage Flexible EuropeInventors: Keith Duane Lind, Johnny Qiang Zheng, Jay Daniel Hodson, George Herbert Walbrun
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Publication number: 20040115378Abstract: An apparatus and method for the controlled release of chemical additives within piping and wellbores. The apparatus is a water dispersible container that controls the release of one or more chemical additives such as corrosion inhibitors, oxygen scavengers, or biocides. The dispersible container is comprised of polyvinyl alcohol chains. The selection of the chains is determined by the application of the container and includes short-chained cold water soluble polyvinyl alcohols, long-chained hot water soluble polyvinyl alcohols, or vinyl alcohol co-polymers. In the method for the controlled release of chemical additives, the container is placed in a pipe or tank for circulation throughout a wellbore. Alternatively, the container is placed in a cap for a subsea well bore.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Applicant: Tetra Technologies, Inc.Inventors: Weyman H. Dunaway, Brian A. Butler, Michael F. Adkins, Reza Talabi
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Patent number: 6746622Abstract: Herein is disclosed an oxygen scavenging composition, comprising an oxygen scavenging polymer comprising units having structure I: wherein R is selected from the group consisting of —H and —C1-C6 alkyls and n is an integer greater than or equal to 1; and an oxidation catalyst. The oxygen scavenging polymer can be used to form an oxygen scavenging packaging article.Type: GrantFiled: February 8, 2002Date of Patent: June 8, 2004Assignee: Chevron Phillips Chemical Company LPInventors: Hu Yang, Ta Yen Ching, Lennard Torres
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Patent number: 6733851Abstract: A packaging article has a hermetic heat seal of a multilayer film to itself or another component of the article. The seal layer contains a blend of a highly branched homogeneous polymer having at least 40 branches per 1000 methylene groups, the highly branched homogeneous polymer having an Mw/Mn less than 3.0, a density of less than 0.89 g/cc, the highly branched homogeneous polymer being present in an amount of from about 5 to 50 weight percent, based on layer weight. The semicrystalline polyolefin has a density of at least 0.90 g/cc, and is present in an amount of from about 50 to 95 weight percent, based on total layer weight. The heat seal has a seal strength at 75° C. of at least 100 grams per centimeter. A process for making the article is also disclosed.Type: GrantFiled: March 25, 2002Date of Patent: May 11, 2004Assignee: Cryovac, Inc.Inventor: Isabella Ferri
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Patent number: 6727001Abstract: A laminated film is provided which is constituted essentially of a resin substrate and a coated film disposed thereon. The coated film comprises a montmorillonite containing a cation exchanger other than sodium ions and a water-soluble polymer. The laminated film offers a high oxygen-permeability barrier at high humidity and firm bonding between the coated film and the resin substrate at high humidity. A packaging material derived from the laminated film is also provided.Type: GrantFiled: December 5, 2001Date of Patent: April 27, 2004Assignee: Toray Industries, Inc.Inventors: Motonori Hochi, Shigeru Tanaka, Kusato Hirota
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Patent number: 6720045Abstract: An easily peelable film comprising a mixture of a propylene/&agr;-olefin copolymer (A), a propylene/&agr;-olefin copolymer (B) having an &agr;-olefin content different from that of the copolymer (A), and/or a propylene homopolymer (C) and a medical packaging container produced using the same. The easily peelable film has excellent heat resistance, flexibility, and transparency and further a broad temperature range for low temperature welding at which peelable partition walls can be formed.Type: GrantFiled: December 8, 2000Date of Patent: April 13, 2004Assignee: Nipro CorporationInventors: Shin-ichi Kawamura, Hiroshi Fukushima
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Patent number: 6716499Abstract: A three-component laminate is disclosed which may be formed into bags and pouches suitable for packaging a variety of moisture and oxygen sensitive products, particularly dry-flow products such as resin pellets, pet food and coffee. The first component is an oriented, multilayer sealant film having an outermost layer which is sealable to itself and to the outermost surface of the third component. The second component, which is disposed between the first component and the third component, is a metallized film. The resulting laminate and bags formed therefrom exhibit excellent moisture and gas barrier properties, excellent abuse resistance and reduced package failure as compared to foil-based packages.Type: GrantFiled: June 8, 2000Date of Patent: April 6, 2004Assignee: Cryovac, Inc.Inventor: Parimal M. Vadhar
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Publication number: 20040058178Abstract: Herein is disclosed a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group.Type: ApplicationFiled: June 19, 2003Publication date: March 25, 2004Applicant: Chevron Phillips Chemical Company LP.Inventors: Hu Yang, Ta Yen Ching, Gangfeng Cai