Polyamide (e.g., Nylon, Etc.) Or Addition Polymer Of At Least One Monoethylenically Unsaturated Monomer (e.g., Polyethylene, Polypropylene, Polystyrene, Etc.) Containing Layer Patents (Class 264/173.14)
  • Publication number: 20030099851
    Abstract: Polyolefin films having excellent barrier and metal adhesion characteristics and methods for producing the same are provided. The polyolefin film structures include a polyolefin core layer having a first and second side, a heat sealable layer adjacent to the first side of the core layer and substantially coextensive therewith, and a high barrier layer adjacent to the second side of the core layer and substantially coextensive therewith. The high barrier layer includes a blend of ethylene vinyl alcohol copolymer and nylon. Preferred embodiments of the present invention also provide for a metallized skin layer adjacent to the high barrier layer and substantially coextensive therewith.
    Type: Application
    Filed: December 5, 2000
    Publication date: May 29, 2003
    Inventors: Eldridge M. Mount, Francis Tran, John A. Larter
  • Publication number: 20030089450
    Abstract: Recently, in terms of improving the yield and production rate of a biaxial-oriented polypropylene pearly synthetic paper, since the inorganic powder itself has an unsteady dispersion property while blended with polypropylene and while the extruder raises its production rate, which causes a shorter period of replacing the filter screen of the extruder; consequently, frequently replacing the filter screen deteriorates the efficiency of production, further obstructs the goal of increasing the yield from being achieved.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 15, 2003
    Inventor: Allen Fong-Chin Lin
  • Publication number: 20030090026
    Abstract: A method and apparatus are described for coextruding two materials A and B, in which B is extruded on A through a port (3), in which the separating wall between the flows of A and B is formed as a flap closure (4) adapted to act as a non-return valve for the flow of B into A, and further means are provided for extruding B through the port in pulses. The pulses may be effected by opening and closing the closure, by mechanical transmission means or by the effect of imposing pressure difference on the flap (4) by the flows of A and/or B. The pulsing means preferably involves rams (1). The invention is particularly suitable for extruding a low viscosity material B onto a higher viscosity material A, or for making sheets or pipes with alternating segments of differential flexibility, or for coextruding a flow of solid particles with a flow of liquid.
    Type: Application
    Filed: October 9, 2002
    Publication date: May 15, 2003
    Inventor: Ole-Bendt Rasmussen
  • Patent number: 6562443
    Abstract: A heat shrinkable film suitable for use in cook-in applications is provided which exhibits a transverse direction free shrink at 50° C. of less than about 2% and a transverse direction free shrink at 57° C. of at least about 3%. The food contact layer includes a polymer having a surface energy of at least about 0.034 J/m2 and a second layer includes at least one member selected from the group consisting of polyester, polyvinylidene chloride, polyamide and polyalkylene carbonate. Preferably, the desired shrink properties are attained by annealing the film under controlled conditions.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: May 13, 2003
    Assignee: Cryovac, Inc.
    Inventors: R. Karina Espinel, Ram K. Ramesh
  • Patent number: 6562476
    Abstract: 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: Grant
    Filed: October 4, 1999
    Date of Patent: May 13, 2003
    Assignee: Pechiney Emballage Flexible Europe
    Inventors: Mary E. Shepard, Scott W. Middleton, Robert J. Blemberg, Jerry F. Jesse
  • Patent number: 6558808
    Abstract: The disclosed heat-sealable, layered film comprises a polyolefinic base layer and at least one outer layer. The outer layer comprises a propylene-olefin copolymer prepared by means of a metallocene catalyst. The film is prepared by coextruding melts corresponding to the individual layers of the film, taking off the coextruded film over a take-off roll whose temperature is between 10 and 90° C., biaxially stretching and then heat-setting the resulting film, and optionally corona- or flame-treating the film, then winding it up in a wind-up unit.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: May 6, 2003
    Assignee: Basell Polyolefine GmbH
    Inventors: Thomas Dries, Walter Spaleck, Andreas Winter
  • Publication number: 20030059593
    Abstract: 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: Application
    Filed: July 11, 2002
    Publication date: March 27, 2003
    Inventors: Takatoshi Sakaguchi, Junichi Kimura, Teruaki Yoshida
  • Patent number: 6524029
    Abstract: A geomembrane comprising a unitary structure fabricated by co-extrusion including a center core, a thermoplastic adhesive layer secured on one side of the center core, and a textured layer secured on the opposite side of the center core. The geomembrane is utilized in the manufacture of a liner for earthen constructions by employing the thermoplastic layer of the geomembrane to secure the geomembrane to a geosynthetic clay liner.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: February 25, 2003
    Assignee: Olympic General Corporation
    Inventors: James E. Nobert, Jesse W. Raia
  • Patent number: 6521338
    Abstract: A multilayer stretch film comprises a first layer having cling properties and comprising an homogeneously-branched copolymer of ethylene and a C4-8 &agr;-olefin, the copolymer having a density in the range 0.850 to 0.890 g/cm3, and a second layer having substantially no cling properties and comprising at least 80 wt. % of a low density polyethylene having a density in the range 0.915 to 0.940 g/cm3. Optionally, the film may comprise at least one core layer between the first and second layers. Films of this type are particularly suited to palletisation of loads.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: February 18, 2003
    Assignee: Mima Films S.C.A.
    Inventor: Xavier Maka
  • Publication number: 20030015819
    Abstract: An elastic web of material has a multiplicity of stems extending from at least one side of the web. The web includes a first continuous layer of elastic material having a first side and a second side and a second layer of material. The second layer of material has a first side which faces the first side of the first layer and a second side from which the stems extend. The first and second layers of material are joined together. The second layer of material can be formed of thermoplastic material or melt processable polymeric material. The first and second layers of material are melt formed. They are joined by coextrusion or lamination to form a multiple layer sheet on which a multiplicity of stems are formed on at least the second layer by a process such as embossing the stems into the heated web using a patterned roll or mold.
    Type: Application
    Filed: September 9, 2002
    Publication date: January 23, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Leon Levitt, Robert D. Kampfer, Michael D. Delmore, Stephen E. Krampe, Brandon T. Berg, Alan J. Sipinen, Mark E. Napierala, Victor P. Thalacker
  • Publication number: 20030008084
    Abstract: Tubular, biaxially stretched, heat shrinkable multilayer film food casings comprising inner and outer polyamide layers on either side of a core layer of EVOH surrounded by an inner and outer adhesive layer, and a coextrusion process for making the film.
    Type: Application
    Filed: May 10, 2002
    Publication date: January 9, 2003
    Inventors: Stephen J. Vicik, Amy L. Glawe
  • Patent number: 6495266
    Abstract: The invention discloses methods of improving blocking resistant properties and reducing the coefficient of friction of a multilayer film comprising providing at least one layer of an ethylene-propylene impact copolymer having from about 3% to about 30% by weight ethylene, wherein said copolymer has no more than two peaks in the melting curve within the range from about 110° C. to about 165° C., and wherein said layer is non-heat sealable, to a multilayer film having a core layer comprising polypropylene, high density polyethylene (HDPE) or linear low density polyethylene (LLDPE), whereby anti-blocking and coefficient of friction characteristics of said film is improved without necessity of adding an antiblock or slip agent.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: December 17, 2002
    Assignee: ExxonMobil Oil Corporation
    Inventor: Robert A. Migliorini
  • Publication number: 20020187326
    Abstract: A thermoplastic film comprising a core layer comprising a polyolefin wherein the core layer comprises the interior of the film; and a first skin layer comprising a silicone grafted polymer, wherein the first skin layer is exterior to the core layer.
    Type: Application
    Filed: June 12, 2001
    Publication date: December 12, 2002
    Inventor: Dan-Cheng Kong
  • Publication number: 20020187333
    Abstract: The present invention provides a process for effectively extruding a polypropylene polymer onto a cellulosic substrate. In the process, a polypropylene polymer is co-extruded with a polyolefin polymer other than polypropylene so as to stabilize the molten polypropylene polymer layer. Co-extrusion also allows extruding the polypropylene polymer at elevated temperatures so that the polypropylene is oxidized. Thus the polypropylene layer more readily bonds to a substrate without requiring a primer or ozone pretreatment step.
    Type: Application
    Filed: May 23, 2001
    Publication date: December 12, 2002
    Inventor: Jiren Gu
  • Patent number: 6489019
    Abstract: A co-extruded sheet made from olefin polymer materials includes (1) at least one outer layer of (a) a propylene polymer having a melt flow rate of 0.5-15 dg/min, or a graft copolymer comprising a backbone of a propylene polymer material, to which is graft polymerized a vinyl monomer, and (b) a nucleating agent having a melting point greater than 265° C. and (2) another layer made from (a) about 5% to about 50% of a high melt strength propylene homopolymer or copolymer, and/or about 5% to about 40% of chopped glass fibers, (b). optionally about 5% to about 40% of an inorganic filler, (c) about 2% to about 50% of an olefin polymer composition, and (d) optionally about 5% to about 70% of one or more other olefin polymer materials. When the second layer is reinforced with glass fibers, the stiffness of the sheet is increased while maintaining impact strength.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: December 3, 2002
    Assignee: Basell Poliolefine Italia S.p.A.
    Inventors: Bakhtiar Alam Shah, Jay S. Rosenthal
  • Publication number: 20020168489
    Abstract: The invention relates to high gas barrier packaging films exhibiting good shrinkage and containing an antifog composition for modified atmosphere packaging of foods and the like. The films are useful for producing modified atmosphere packages that preserve and enhance the shelf life of food and nonfood oxygen sensitive items. The films exhibit excellent shrinkage, permanent antifog, easy processing and low cost of manufacture.
    Type: Application
    Filed: May 8, 2001
    Publication date: November 14, 2002
    Inventors: Robert R. Ting, Earl L. Hatley, Jeffrey D. Moulton
  • Publication number: 20020164470
    Abstract: A thermoplastic multi-layer film for forming hermetic seals on packages comprising layer B comprising polypropylene and a softening additive; and layer C comprising a copolymer.
    Type: Application
    Filed: February 20, 2002
    Publication date: November 7, 2002
    Inventor: Michael J. Bader
  • Publication number: 20020160167
    Abstract: A thermoplastic multi-layer film for forming hermetic seals on packages comprising layer A comprising polyethylene, layer B comprising polypropylene, layer C comprising a copolymer, and an adhesion promoting coating applied to layer C.
    Type: Application
    Filed: February 23, 2001
    Publication date: October 31, 2002
    Inventor: Michael J. Bader
  • Publication number: 20020155267
    Abstract: A thermoplastic multi-layer film for forming hermetic seals on packages comprising layer B comprising polypropylene and a softening additive; and layer C comprising a copolymer.
    Type: Application
    Filed: February 22, 2001
    Publication date: October 24, 2002
    Inventor: Michael John Bader
  • Publication number: 20020155308
    Abstract: 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: Application
    Filed: December 21, 2001
    Publication date: October 24, 2002
    Inventors: Michael T. Heffelfinger, Jay K. Keung, Robert G. Peet
  • Publication number: 20020155307
    Abstract: The present invention is a non-porous, breathable membrane of at least polyamide-4,6, with an elongation at rupture of about 250 to about 500% in the longitudinal direction and about 200 to about 500% in the transverse direction. The membrane has a higher heat resistance than a non-porous, breathable membrane made from polyether ester and, if it also contains an antioxidant, passes the oven/watertightness test. If the membrane is produced from a mixture of polyamide-4,6 and about 10 to about 30% by weight polyether amide, the membrane exhibits a surprisingly increased water-vapor permeability. The membrane is usable in the manufacture of thermally protective clothing.
    Type: Application
    Filed: April 3, 2002
    Publication date: October 24, 2002
    Applicant: SYMPATEX TECHNOLOGIES GMBH
    Inventors: Bertram R. Bohringer, Henricus Joannes Maria Van De Ven, Jozef Christiaan Wilhelmus Spijkers
  • Publication number: 20020150751
    Abstract: Biaxially oriented, coextruded polyester films with a base layer at least 90% by weight of which is composed of a thermoplastic polyester, preferably polyethylene terephthalate (PET), and with at least one sealable outer layer and a second nonsealable outer layer and, if desired, with other intermediate layers, and comprising at least one UV absorber, preferably hydroxybenzotriazoles and triazines, have high UV resistance, do not embrittle when exposed to high temperatures, have a surface without undesirable haze and are suitable for numerous indoor and outdoor applications. The outer layers comprise antiblocking agents, such as silica with an average particle diameter preferably below 50 nm and/or above 2 &mgr;m, and the sealable outer layer is preferably composed of a copolyester which has been built up from ethylene terephthalate units and ethylene isophthalate units.
    Type: Application
    Filed: February 8, 2001
    Publication date: October 17, 2002
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Andreas Stopp, Herbert Peiffer
  • Publication number: 20020122952
    Abstract: An oriented multilayer film comprises:
    Type: Application
    Filed: July 8, 1999
    Publication date: September 5, 2002
    Inventors: JOHN P. DELISIO, LYLE J. HARLEY, JAY K. KEUNG, ROBERT G. PEET
  • Patent number: 6440533
    Abstract: A coextruded multilayer film laminate featuring a polyolefin based formulation which closely matches the mechanical performance criteria of a plasticized PVC film is disclosed. This film is particularly suitable for use as a replacement film for plasticized PVC in a variety of medical and non-medical applications. The multilayer films of the present invention offer a particular set of mechanical properties, normally associated with plasticized PVC, including easy stretch, high degree of recovery, low fatigue and minimal permanent set. Moreover, these polyolefin based formulations do not contain any known or suspected carcinogenic compounds and may be produced at costs that are highly competitive with the costs associated with a conventional, plasticized PVC film.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: August 27, 2002
    Assignee: Tredegar Film Products Corporation
    Inventors: Carl Douglas Ray, James Peter DiPoto, Shailesh Chunilal Patel
  • Patent number: 6410124
    Abstract: A multi-layer film includes a base layer comprising a polyolefin and at least one additional layer comprising a metallocene-catalyzed syndiotactic polypropylene, wherein the base layer and the at least one additional layer comprising a metallocene-catalyzed syndiotactic polypropylene are not suitable for use as a heat sealable film. The multi-layer films of the present invention have improved metallizable surfaces and the metallized films exhibit excellent gas (e.g., oxygen and water vapor) barrier properties, as well as good pick off, optical properties (optical density, haze, and gloss), and coefficient of friction (COF).
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: June 25, 2002
    Assignee: ExxonMobil Oil Corporation
    Inventor: Robert G. Peet
  • Patent number: 6403005
    Abstract: A method of making a high gloss, multilayered thermoplastic film by pinning the extruding the molten thermoplastic film material onto a polished casting roll having a mirror finish. The thermoplastic film produced by this method has a superior gloss finish and has a ratio of distinctness of image in the machine direction to distinctness of image in the cross direction in the range of 1.3:1 to 1.0:1, and has a 20° gloss in the machine direction and the cross direction of at least 40.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: June 11, 2002
    Assignee: Avery Dennison Corporation
    Inventors: Bernard S. Mientus, Michael Hannington, Luigi V. DiCarlo
  • Publication number: 20020064646
    Abstract: A multilayer polymeric film comprises:
    Type: Application
    Filed: May 27, 1999
    Publication date: May 30, 2002
    Inventors: GEORGE CRETEKOS, ROBERT A. MIGLIORINI
  • Publication number: 20020050124
    Abstract: A multilayer stretch film comprising at least a first layer (i) with cling properties comprising an olefin (co)polymer composition, a second layer (ii) with slip properties comprising another olefin (co)polymer composition and if desired at least one core layer (iii) comprising an olefin (co)polymer composition between the first layer (i) and the second layer (ii). The outer surface of the first layer (i) with cling properties is provided with a non-stretchable thin film of one or more slip agent(s) covering at least 50% up to 100% of the outer surface of the first layer (i), lowering the cling properties of the unstretched composite film. The thin film of slip agent(s) is provided either by direct application of the slip agent(s) onto the outer surface or by use of slip agent(s) having limited compatibility with the (co)polymer composition as additive in the (co)polymer composition of the first layer (i).
    Type: Application
    Filed: September 28, 2001
    Publication date: May 2, 2002
    Inventor: Norbert Jaeger
  • Patent number: 6379605
    Abstract: Disclosed is a process for producing a three layers co-extrusion biaxially oriented polypropylene (hereinafter as BOPP) synthetic paper and transparent film for in-mold label. More particularly, the invention relates to a process for producing a three layers biaxially oriented PP synthetic paper by means of three layers co-extrusion wherein three different PP resin compositions are separately extruded by one primary and two secondary extruders first, and then are co-flowed by a same T-die to form a three layers coating sheet.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: April 30, 2002
    Assignee: Nan Ya Plastics Corporation
    Inventor: Allen Fong-Chin Lin
  • Publication number: 20020041971
    Abstract: 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: Application
    Filed: September 27, 1999
    Publication date: April 11, 2002
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: DANIEL G. DENEHY, ERIC D. TUTTLE
  • Publication number: 20020041057
    Abstract: An embossed, cast polyolefin film or an embossed, oriented polyolefin film comprises: (a) a core layer comprising a propylene polymer; (b) an embossed outer layer on one side of the core layer, the embossed outer layer comprising an olefin polymer capable of being embossed; and (c) an additional outer layer on a side of the core layer opposite to the embossed outer layer, the additional outer layer comprising an olefin polymer. The embossed film can then be metallized to produce a shiny, metallic film having a prismatic or holographic appearance.
    Type: Application
    Filed: December 5, 2001
    Publication date: April 11, 2002
    Inventors: Robert Andrew Migliorini, Christopher Nothnagle, Salvatore James Pellingra
  • Patent number: 6368545
    Abstract: At least two techniques can be used separately or together to achieve higher clarity in multilayer blown coextruded films. In a first technique, the core layer is extruded at a higher temperature than the skin layer or layers. In the second technique, the core layer has a higher density than the skin layer or layers. Combinations of these techniques are also contemplated. Either one or both techniques may be used to a sufficient degree to improve clarity (generally lower haze).
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: April 9, 2002
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peter N. Bailey, Stefan Bertil Ohlsson, Willy Jozef Joanna Leysen
  • Patent number: 6368543
    Abstract: Disclosed is an improvement of a process for producing a three layers co-extrusion biaxially polypropylene(BOPP) synthetic paper of thickness 25˜250 &mgr;m which is menufactured by using three single screw extruders By means of an improvement of a process for producing a three layers co-extrusion biaxially polypropylene(hereinafter as BOPP) synthetic paper of thickness 25˜250 &mgr;m. More particularly, the invention relates to a process for producing a three layers BOPP synthetic paper by means of three layers co-extrusion wherein two different PP resin compositions are separately extruded by one primary single screw extruder with venting device and two secondary single screw extruders with venting device first, and then are co-flowed by a same T-die to form a three layers coating sheet, and through cooling, biaxial orientation, corona treatment and winding to form a three layers co-extrusion synthetic paper of thickness 25˜250 &mgr;m.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 9, 2002
    Assignee: Nan Ya Plastics Corporation
    Inventor: Allen Fong-Chin Lin
  • Patent number: 6364988
    Abstract: Disclosed is a process for producing a 3-layer co-extruded biaxially polypropylene (hereinafter as BOPP) synthetic paper of thickness 25-250 &mgr;m. More particularly, the invention relates to a process for producing a 3-layer biaxially-oriented PP synthetic paper by means of 3-layer co-extrusion wherein two different PP resin compositions are separately extruded by one primary and two secondary extruders first, and then are co-flowed by a same T-die to form a three layers coating sheet, and through cooling, biaxial orientation, corona treatment and winding to form a 3-layer co-extrusion synthetic paper of thickness 25-250 &mgr;m.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 2, 2002
    Assignee: Nan Ya Plastics Corporation
    Inventor: Allen Fong-Chin Lin
  • Publication number: 20020037386
    Abstract: A three-layer microwaveable, plastic wrap having a core layer between a cling layer and a release layer is disclosed, along with a method for making the plastic wrap. The cling layer comprises a base resin and an effective amount of a tackifier to provide sufficient cling to different surfaces such as, for example, glass, plastic, ceramic, stainless steel laminated cardboard, and aluminum. The release layer includes an effective amount of an anti-blocking agent to facilitate dispensing of the wrap from a dispensing roll.
    Type: Application
    Filed: July 31, 2001
    Publication date: March 28, 2002
    Inventor: Douglas D. Bonke
  • Patent number: 6361728
    Abstract: A process of preparing multilayer sheet made of an outer layer comprising polyethylene, a finely granulated material and a pigment, a middle layer comprising polyethylene, which may contain a finely granulated material and a pigment, and an inner layer which contains a polyethylene and which may also contain a filler and a pigment. The multilayer sheet feels like and has at least some of the properties of paper.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: March 26, 2002
    Assignee: Glopak Inc.
    Inventors: Connie J. Nucci, Jean-François Dalpé
  • Publication number: 20020028309
    Abstract: A tubular, multilayer film comprises a central barrier layer and a pair of adhesive layers on opposite sides of the central barrier layer. The adhesive layers completely cover the central barrier layer. Opposing edges of the central barrier layer overlap longitudinally along the tubular, multilayer film. The total thickness of the central barrier layers in the overlapping portion is substantially the same as the thickness of the central barrier layer in the non-overlapping portion. The tubular, multilayer film also includes inner and outer surface layers. The inner surface layer extends completely around the interior of the tubular, multilayer film, and the outer surface layer extends completely around the exterior of the tubular, multilayer film.
    Type: Application
    Filed: July 3, 2001
    Publication date: March 7, 2002
    Inventors: Joseph Dooley, Steven R. Jenkins, John A. Naumovitz
  • Patent number: 6340530
    Abstract: Book covers and a substantially transparent, coextruded matte, bilayer nylon film which is contact transparent to a paper stock to form a soft book cover having high scratch, abrasion and mar resistance, a soft feel and good moisture curl properties. A substantially transparent, coextruded film which has a first nylon layer attached adjacent to a second nylon layer, the first nylon layer has from about 20 weight percent to about 70 weight percent of a refractory filler based on the weight of the first nylon layer.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: January 22, 2002
    Assignee: Honeywell International Inc.
    Inventors: Simon J. Porter, Jeffrey D. Moulton, Lance R. Altizer
  • Publication number: 20010019182
    Abstract: Methods and apparatuses are provided for the manufacture of coextruded polymeric multilayer optical films. The multilayer optical films have an ordered arrangement of layers of two or more materials having particular layer thicknesses and a prescribed layer thickness gradient throughout the multilayer optical stack. The methods and apparatuses described allow improved control over individual layer thicknesses, layer thickness gradients, indices of refraction, interlayer adhesion, and surface characteristics of the optical films. The methods and apparatuses described are useful for making interference polarizers, mirrors, and colored films that are optically effective over diverse portions of the ultraviolet, visible, and infrared spectra.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 6, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: Timothy J. Hebrink, Yaoqi J. Liu, William Ward Merrill, Bruce A. Nerad, John A. Wheatley
  • Patent number: 6273983
    Abstract: A molding for a vehicle and its manufacturing method, wherein a molding body excellent in rigidity is formed by a mixture of a hard olefin based resin and powders such as mica, talc, glass fibre, etc., and is coated with a protective film layer of an olefin based resin, excellent in resistance to scuffing and chemicals, on the exposed surface. An intermediate adhesive layer having a thermofusion bond property, which is an olefin based thermoplastic elastomer resin composition, or a styrene based thermoplastic elastomer resin composition, can be sandwiched between the hard olefin based resin of the molding body and olefin based resin of the protective film layer. The molding body, the intermediate adhesive layer if present, and the protective film layer are integrally molded by several extruders and firmly laminated as a whole.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: August 14, 2001
    Assignees: Tokiwa Chemical Industries Co., Ltd., System Technical Co., Ltd.
    Inventors: Naohisa Miyakawa, Katsuhisa Kato
  • Publication number: 20010008687
    Abstract: Conformable multilayer films having alternating layers of a stiff polymeric material and a flexible polymeric material are described.
    Type: Application
    Filed: February 7, 2001
    Publication date: July 19, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: Richard A. Kollaja, David D. Nguyen, Ronald S. Steelman, Buren R. Ree, Steven D. Solomonson, Philip D. Radovanovic
  • Patent number: 6245183
    Abstract: A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treatment layer is bonded to the zinc layer, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate and mixtures thereof. A first polymeric layer is bonded to the surface treatment layer, wherein the first polymeric layer is selected from the group consisting of a thermoplastic elastomer, an ionomer, a nylon, a fluoropolymer, and mixtures thereof. A second polymeric layer is bonded to the first polymeric layer, wherein the second polymeric layer is selected from the group consisting of a nylon, a thermoplastic elastomer, a fluoropolymer, and mixtures thereof.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: June 12, 2001
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Ralph A. Iorio, Robert M. Davie, James D. McDaniel, Frank L. Mitchell, Tao Nie
  • Publication number: 20010003021
    Abstract: 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: Application
    Filed: October 4, 1999
    Publication date: June 7, 2001
    Applicant: MARY E. SHEPARD, et al
    Inventors: MARY E. SHEPARD, SCOTT W. MIDDLETON, ROBERT J. BLEMBERG, JERRY F. JESSE
  • Patent number: 6238607
    Abstract: A method of producing highly oriented multilayer films comprising laminating films having at least one layer of a fluoropolymer, at least one layer of a polyolefin homopolymer or copolymer and an intermediate adhesive layer of a polyolefin having at least one functional moiety of an unsaturated carboxylic acid or anhydride thereof. With this structure the polyolefin layer allows the fluoropolymer layer to be stretched up to ten times its original length. Such a high orientation ratio for the fluoropolymer film increases the mechanical strength, toughness, and water vapor barrier properties of the film while using a thinner gauge fluoropolymer film.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: May 29, 2001
    Assignee: AlliedSignal Inc.
    Inventors: Mingliang Lawrence Tsai, Yash Pal Khanna, Joseph Edgar Mackey
  • Patent number: 6221288
    Abstract: A method of producing a composite stratiform material uses at least one extruder having a pair of co-rotating screws to co-extrude at least three layers, each layer having polypropylene and at least one filler. In a carrier layer the filler is particulate organic filler, and in first and second outer layers the filler is an inorganic filler. The co-extrusion provides for interfusion of the carrier layer with the outer layers at mutually opposite layer interfaces. The particulate organic filler of the carrier layer is either vegetabilic or wood which is extruded by a co-rotational extruder. The inorganic filler is introduced into at least one second extruder for extruding at least one of the outer layers.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: April 24, 2001
    Assignee: ICMA San Giorgio S.p.A.
    Inventor: Gian Carlo Colombo
  • Patent number: 6207092
    Abstract: A process for making a drag shield for a lawn mower includes forming from a rigid plastic material a relatively inflexible first end member adapted for secure attachment via a connecting element to an associated lawn mower deck, and a relatively inflexible second end member with a web portion extending therebetween for connecting the first and second end members. The web is formed from a rigid plastic material having a sufficiently thin and substantially uniform cross section for maintaining flexibility. The web and first and second end members are integral and provided in a single piece of rigid plastic material. The process further includes forming first and second layers of flexible plastic material on opposing sides of the web portion.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: March 27, 2001
    Assignee: K. Jabat, Inc.
    Inventor: Stanley V. Kulkaski
  • Patent number: 6187236
    Abstract: Process for the preparation of a polyethylene multilayer film starting from linear low density polyethylene (LLDPE) by cast-extrusion, wherein the multilayer material coming out from a spreading head is collected on a first roller cooled with water maintained between 10° and 25° C. and the film coming out from the first cooling roller is sent to a second roller cooled with water maintained at a temperature lower than that of the first roller and the second roller has a peripheral velocity or speed of rotation 10-40% higher than that of the first roller. Multilayer film having a yield point and an ultimate elongation comprised within certain limits.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: February 13, 2001
    Assignee: Pentacast S.r.l.
    Inventor: Giuseppe Brambilla
  • Patent number: 6168826
    Abstract: Methods of preparing biaxially oriented polyethylene films with improved optics and sealability properties are provided. The methods include stretching in the machine direction a multi-layer base sheet having a core layer with a first and a second side, at least one skin layer and outer surfaces; then coating at least one of the outer surfaces with a resin selected from the group consisting of low density polyethylene, very low density polyethylene, linear low density polyethylene and blends thereof, and finally, stretching the base sheet in a direction transverse to the machine direction.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: January 2, 2001
    Assignee: Mobil Oil Corporation
    Inventors: Tien-Kuei Su, Robert V. Poirer