Including Subsequent Reshaping (e.g., Stretching, Etc.) Patents (Class 264/173.15)
  • Patent number: 10286585
    Abstract: Disclosed herein are biomaterials that include a plurality of fibers embedded in a matrix of hydrogel material. The plurality of fibers and hydrogel material are formed during one process step. In one embodiment, the plurality of fibers and hydrogel materials are formed using a multilayer coextrusion process step. Additional process steps can be performed to form a tissue engineering scaffold. Such a scaffold can be used to grow biological matter. In one embodiment, stem cells are applied to the scaffold to grow biological material. Process steps can be controlled to determine certain mechanical properties of the resulting biomaterial. In one embodiment, the process steps are controlled to determine the stiffness of the resulting biomaterial. In such an embodiment, the stiffness of the resulting biological material determines physical properties of the biological material grown on the scaffold.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: May 14, 2019
    Assignee: Case Western Reserve University
    Inventors: LaShanda T. J. Korley, Gary E. Wnek, Alexander M. Jordan
  • Patent number: 9919467
    Abstract: The present disclosure generally relates to extrusion die systems. In particular, the present disclosure relates to the cyclical extrusion of materials to generate small sized grain features, generally in the range of nanosized grain features, in a tubular or profile shape, in which the individual nanolayers possess pores and/or polymer crystals oriented parallel to the extrusion flow direction and including products with enhanced permeation properties.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: March 20, 2018
    Assignee: Guill Tool & Engineering Co., Inc.
    Inventors: Richard Guillemette, Robert Peters, Christopher Hummel
  • Patent number: 9598212
    Abstract: A method of forming a confined crystallization multilayer film includes coextruding a plurality of first polymer layers and a plurality of second polymer layer to form a multilayer film wherein each first polymer layer is sandwiched between second polymer layers and axially orienting the multilayer film at a temperature below the melting temperature (Tm) of the second polymer layer and to a thickness such that each first polymer layer forms a high aspect ratio substantially crystalline lamellae.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: March 21, 2017
    Assignee: Case Western Reserve University
    Inventors: Anne Hiltner, Eric Baer, Yijian Lin, Joel Carr
  • Patent number: 9346209
    Abstract: Disclosed are a feedblock multiplier with thickness gradient variation, a feedblock system, a method, and multilayer structure made by the method. The feedblock multiplier combines the functionalities of feedblock and multiplier conventionally used for producing the multilayer structure. The feedblock multiplier includes an input section for feeding fluid materials. A feedblock section is included for dividing the fluid delivered into multiple channels correspondingly. The fluids in the channels are segmented into two or more fluid segments by a segmenting section. The each fluid segment is delivered through corresponding channel-conversion section with thickness-gradient variation in the feedblock multiplier. Each channel-conversion section includes multiple channels with configurable positions. The fluids are then combined in a multiplier section for producing the multilayer structure with overlapped layers. The multilayer structure is outputted from an extruding section.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: May 24, 2016
    Assignee: EXTEND OPTRONICS CORP.
    Inventors: Jen-Huai Chang, Wen-Cheng Wu
  • Patent number: 9028732
    Abstract: A single-sided, slip resistant, self-adhesive material is produced using a blown film process which produces a film having an interior layer capable of being treated or coated to accept a pressure sensitive adhesive, a middle layer of flexible polyolefin and an exterior polyolefin elastomer layer in combination with a blowing agent to produce a single-sided slip resistant material. A number of in-line rollers are optionally provided after a pair of nip rollers, which form part of a machine direction orienter (MDO) that is used in line in the manufacturing process to heat, and then cool and condition (anneal and relieve any stresses and/or thickness inconsistencies) the film prior to the film being coated on one side with a pressure sensitive adhesive.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: May 12, 2015
    Assignee: Multi Technologies Industrial L.L.C.
    Inventors: Michael C. Sullivan, Thomas Zickell, II, George M. Orlych
  • Patent number: 8999502
    Abstract: A cover tape having a temperature at which a heat shrinkage rate in at least one of a machine direction and a transverse direction perpendicular to the machine direction is 5% or more between 80° C. to 200° C.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: April 7, 2015
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Masayuki Yoshino, Toshihiro Koyano, Daisuke Masaki, Yutaka Matsuki
  • Patent number: 8945703
    Abstract: The invention relates to a polyester film incorporating at least one UV stabilizer of the formula I, in which R1 is hydrogen, alkyl, alkenyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, or heteroaryl, and R2 is a moiety which contains at least one ?-electron system, which contains a carbon atom and at least one further atom selected from carbon, oxygen, and nitrogen, where the moiety R2 contains at least one atom different from carbon, where the film includes at least one further UV absorber which does not correspond to the formula I. The invention further relates to a process for producing the film, and also to articles formed from the film.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: February 3, 2015
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Holger Kliesch, Oliver Klein, Andreas Bork, Ingo Fischer
  • Publication number: 20140315067
    Abstract: A method of producing a microporous membrane includes combining at least a first polyethylene and a first diluent; combining at least a second polyethylene and a second diluent; combining at least a third polyethylene and a third diluent; forming from the combined polyethylenes and diluents a multi-layer extrudate having a first layer containing the first polyethylene, a second layer containing the second polyethylene, and a third layer located between the first and second layers containing the third polyethylene, wherein the extrudate contains polyethylene having a terminal unsaturation ?0.20 per 10,000 carbon atoms in an amount of 4.0 wt. % to 35.0 wt. %; and removing at least a portion of the first, second, and third diluents from the multi-layer extrudate to produce the membrane.
    Type: Application
    Filed: May 12, 2014
    Publication date: October 23, 2014
    Applicant: Toray Battery Separator Film Co., Ltd.
    Inventor: Kazuhiro Yamada
  • Patent number: 8808595
    Abstract: The present invention provides a multilayer film for forming medical solution pouches that help prevent or reduce the presence of bubbles or foam in the solution after heat sterilization. In particular, the present invention provides a multilayer film for forming medical solution pouches that are capable of passing the bubble test as set forth in the Chinese State Drug Package Container Material Standard No. YBB00112005. In particular, the present invention provides a multilayer film in which polyamide 612 or calcium stearate component has been incorporated as an anti-foaming agent. The presence of polyamide 612 or calcium stearate in one or more layers of the film helps prevent the formation of foam in the solution after heat sterilization.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: August 19, 2014
    Assignee: Cryovac, Inc.
    Inventors: Robert Babrowicz, Marvin Russell Havens, Jerry Christopher Richardson
  • Patent number: 8801984
    Abstract: The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process. Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: August 12, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang-Weon Rhee, Inhwa Jung, Gwigwon Kang, Youngkeun Lee
  • Publication number: 20140208695
    Abstract: The invention relates to a shrink film having a multilayer structure, wherein the core layer of the film includes polypropylene, hydrocarbon resin and block-copolymer rubber. The invention also relates to a label including said film and to use of films for labelling recyclable or reusable items. Further the invention relates to a method for producing shrink film, to a method for attaching a shrink film to an article, and to a method separating a shrink film from an article.
    Type: Application
    Filed: June 29, 2012
    Publication date: July 31, 2014
    Applicant: UPM RAFLATAC OY
    Inventor: Noel Mitchell
  • Patent number: 8778245
    Abstract: A method of forming a confined crystallization multilayer film includes coextruding a plurality of first polymer layers and a plurality of second polymer layer to form a multilayer film wherein each first polymer layer is sandwiched between second polymer layers and axially orienting the multilayer film at a temperature below the melting temperature (Tm) of the second polymer layer and to a thickness such that each first polymer layer forms a high aspect ratio substantially crystalline lamellae.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: July 15, 2014
    Assignee: Case Western Reserve University
    Inventors: Anne Hiltner, Eric Baer, Yijian Lin, Joel Carr
  • Patent number: 8728371
    Abstract: A method of producing a stretched film comprising melt-coextruding a thermoplastic resin A and a thermoplastic resin B to produce a composite film 1 having both-end films 2 of the thermoplastic resin B arranged in parallel at both end portions of the main film 1a of the thermoplastic resin A in the direction of width thereof, stretching the composite film, and cutting and removing both end portions of the stretched film in the direction of width, wherein a film stretch stress value of the both-end films 2 is larger than a film stretch stress value of the main film 1a at the same stretching ratio. This minimizes an increase in the thickness at both end portions of the film in stretching the film and decreases the widths by which both end portions of the expensive resin film are to be cut and removed for producing a film.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: May 20, 2014
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Norimasa Maida, Yoshimi Itoh, Toshiyuki Ueda
  • Patent number: 8647553
    Abstract: In a process of producing a stretch sheet, a strip-shaped laminate sheet 10A having an elastically stretchable elastic layer 1 and substantially inelastic, inelastic fiber layers 2 and 3 partially joined to each other at bonds 4 or a strip-shaped fibrous sheet containing an elastic component and a substantially inelastic component and having embossed regions formed by embossing in parts is stretched in directions starting from the bonds 4 or the embossed regions to obtain a stretch sheet 10. The stretch sheet has raised ridges and recessed grooves extending in the direction perpendicular to the stretch direction, and the bonds 4 or the embossed regions are present in the ridges.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: February 11, 2014
    Assignee: Kao Corporation
    Inventors: Hideyuki Kobayashi, Koji Kanazawa, Akihiko Gunji, Tetsuya Masuki
  • Patent number: 8623250
    Abstract: The invention relates to a method of manufacturing a multilayer object in synthetic resin (9) by compression molding a dose of molten multilayer resin (1) comprising at least one functional layer (2,20), each layer of the dose being in the molten state at the time of compression; the method consisting at least in co-extruding the resins through a die, in cutting the extrudate periodically in order to obtain a dose (1), then in depositing the dose (1) in the molten state in the cavity of a mold; the method thereby defining, within the dose, an extrusion direction and an arrangement of the functional layer (2,20) parallel to the extrusion direction; the method being characterized in that the dose is compressed along a compression axis (16) which intersects the extrusion direction, so as to introduce, into the flow of the layers, asymmetry with respect to the compression axis (16).
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: January 7, 2014
    Assignee: Aisapack Holding S.A.
    Inventor: Jacques Thomasset
  • Patent number: 8617445
    Abstract: The present invention provides a process for producing an oriented thermoplastic polyester resin sheet which is excellent in tensile strength, tencile modulas and heat resistance, and a light laminate-molded body using the same, which has a low linear expansion coefficient and is excellent in impact resistance, durability, easiness of handling, productivity, and others. A process for producing an oriented thermoplastic polyester resin sheet, which includes: pultrusion-drawing a thermoplastic polyester resin sheet in an amorphous state at a temperature from the glass transition temperature of the thermoplastic polyester resin ?20° C. to the glass transition temperature of the thermoplastic polyester resin +20° C.; and then drawing the resultant uniaxially at a temperature higher than the temperature for the pultrusion-drawing. A laminate-molded body, wherein a thermoplastic resin layer is laminated on each of the surfaces of the resultant oriented thermoplastic polyester resin sheet.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: December 31, 2013
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Shigeru Ogasawara, Hirotsugu Yoshida, Hisashi Eguchi, Ryuichi Matsuo
  • Patent number: 8580174
    Abstract: Disclosed herein is a method comprising deforming an organic polymer composition at a temperature below a glass transition temperature of an organic polymer in the organic polymer composition; the deforming being conducted by an application of a shear force, an elongational force, a compressive force, or a combination comprising at least one of the foregoing forces; the forces being applied to the organic polymer composition as it is disposed between a first roll that comprises a rubber surface and a second roll that comprises a textured metal surface; the deforming producing a textured film having a ratio of texturing of about 0.5 to about 3; the textured film having a thickness of about 5 to about 75 micrometers and an average roughness of about 0.3 to about 6 micrometers on opposing surfaces of the film.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: November 12, 2013
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventor: Safwat Ebeid Tadros
  • Patent number: 8568636
    Abstract: The present invention relates to a multilayer film coextruded from an aliphatic polycarbonate and polylactic acid-based polymer and a method for producing the same. According to the present invention, a multilayer film having excellent adhesive property can be manufactured even without a separate adhesive layer.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: October 29, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Min Ho Jeon, Ji Eun Yoo, Moon Jung Choi, Kwang Jin Chung, Myung Ahn Ok
  • Patent number: 8551587
    Abstract: Provided is a polypropylene film, and a method of making the film, the film comprising at least one core layer sandwiched between at least two skin layers, the layers comprising a core layer comprising polypropylene and within the range of from 20 wt % to 50 wt %, by weight of the materials in the core layer, of a propylene-?-olefin elastomer having within the range of from 5 wt % to 25 wt % ?-olefin derived units, by weight of the copolymer; and skin layers comprising one or more polymers having a melting point within the range of from 125° C. to 160° C., a Shore D Hardness within the range of from 55 to 70, and a Flexural Modulus of at least 600 MPa; wherein the film has a Haze value of less than 10%, the film being biaxially oriented but shrinkable substantially only in the MD.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: October 8, 2013
    Assignee: ExxonMobil Oil Corporation
    Inventors: Pang-Cha Lu, Benoit Ambroise
  • Publication number: 20130261736
    Abstract: A bioabsorbable scaffold composed of a multilayer structure of alternating layers of different polymers is disclosed. The multilayer structure can have 20 to 1000 layers and the individual thickness of the layers can be 0.2 to 5 microns. A method of making the scaffold including a layer multiplying extrusion process is disclosed.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 3, 2013
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventor: Lothar W. Kleiner
  • Patent number: 8465759
    Abstract: A process for the preparation of a bioadhesive laminate comprising a hot-melt extruded reservoir layer and a hot-melt extruded backing layer is provided. The reservoir layer comprises a thermoplastic bioadhesive composition containing an active agent. An active agent-containing thermoplastic bioadhesive hydrophilic composition is hot-melt coextruded with a hydrophobic composition to form at least a bi-layered laminate. The hydrophilic composition and the hydrophobic composition have at least one polymer in common. In addition, the melt flow index of the hydrophobic composition is within 50% of the melt flow index of the hydrophilic composition. As a result, the laminate has a uniform transverse cross-section and/or a uniform longitudinal cross-section throughout a major of the length of the laminate. Moreover, when the laminate is divided into unit doses of approximately the same size, they have a high degree of content uniformity with respect to the active agent(s) present therein.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: June 18, 2013
    Assignee: Auxilium US Holdings, LLC
    Inventors: Michael M. Crowley, Justin M. Keen, John J. Koleng, Feng Zhang
  • Publication number: 20130136906
    Abstract: A polyamide resin-based heat-shrinkable multilayer film having excellent heat shrinkability and strength, as well as a high degree of deep A polyamide resin-based heat-shrinkable multilayer film having excellent heat shrinkability and strength, as well as a high degree of deep drawability as represented a shorter side-basis draw ratio (D/L) in excess of 0.6 between a maximum draw depth (D) and a shorter side length (L) of a mold opening is provided. The multilayer film is characterized by including a surface layer (a) comprising a thermoplastic resin, an intermediate layer (b) comprising a polyamide resin, and a surface layer (c) comprising a sealable resin, wherein (A) the intermediate layer (b) comprises a mixture of an aliphatic polyamide having a melting point of at least 180° C., and an amorphous aromatic polyamide comprising a polycondensation product of an aliphatic diamine with is ophthalmic acid and terephthalic acid as main acid components, including 25-45 wt.
    Type: Application
    Filed: December 17, 2010
    Publication date: May 30, 2013
    Inventors: Takahisa Ueyama, Tadayoshi Itoh, Yuta Sekiya
  • Publication number: 20130115398
    Abstract: Provided is a polypropylene film, and a method of making the film, the film comprising at least one core layer sandwiched between at least two skin layers, the layers comprising a core layer comprising polypropylene and within the range of from 20 wt % to 50 wt %, by weight of the materials in the core layer, of a propylene-?-olefin elastomer having within the range of from 5 wt % to 25 wt % ?-olefin derived units, by weight of the copolymer; and skin layers comprising one or more polymers having a melting point within the range of from 125° C. to 160° C., a Shore D Hardness within the range of from 55 to 70, and a Flexural Modulus of at least 600 MPa; wherein the film has a Haze value of less than 10%, the film being biaxially oriented but shrinkable substantially only in the MD.
    Type: Application
    Filed: September 27, 2012
    Publication date: May 9, 2013
    Applicant: ExxonMobil Oil Corporation
    Inventor: ExxonMobil Oil Corporation
  • Publication number: 20130095338
    Abstract: Disclosed is a multi-layer heat shrink film and a method of making the film comprising a core layer comprising at least one ?-olefin copolymer selected from propylene-based elastomers, ethylene plastomers, metallocene catalyzed linear low density polyethylenes, and blends thereof, and an equal or lesser amount of a polypropylene having a melting point higher than ?-olefin copolymer; at least one skin layer comprising a cyclic olefin copolymer (COC); and at least one tie layer between at least one skin layer and the core layer, the tie layer comprising a material or blend of soft materials having a Hardness (ISO 7619, Type A) of from 45 to 100; and a Tensile Strength (ISO 37) of from 10 MPa to 30 MPa.
    Type: Application
    Filed: September 5, 2012
    Publication date: April 18, 2013
    Inventor: Pang-Chia LU
  • Patent number: 8409697
    Abstract: A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising at least 10 microlayers, each of which has a thickness ranging from about 0.001 to 0.015 mil. The ratio of the thickness of any of the microlayers to the thickness of the bulk layer is at least about 1:2. The film has a total free shrink (ASTM D2732-03) of at least about 10% at 200° F.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: April 2, 2013
    Assignee: Cryovac, Inc.
    Inventors: Rafizi Ramli, Larry Bikle McAllister, Anton L. Timmons, Bradford E. Webster, John R. Wolf, Christopher Brown, George D. Wofford
  • Patent number: 8349422
    Abstract: The invention relates to a Flexible Intermediate Bulk Container (FIBC) having a body made of flexible woven fabric, and integral handling devices, wherein the fabric is woven from opaque oriented polyethylene terephthalate (PET) strips having a density of from 500 to 1300 kg/m3 and a tensile strength of at least 250 MPa. Advantages of said FIBC include directly printability with the usual type of inks, giving excellent contrast and good adhesion, without pre-treatment like a corona- or flame-treatment. The FIBC based on the PET fabric also shows higher gloss; better UV resistance; better mechanical properties, like high tensile strength and creep resistance; favorable abrasion resistance; and higher temperature resistance than a conventional big bag based on polypropylene strips. The invention further relates to such a FIBC based on stress-whitened PET tapes obtained by a special drawing process.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: January 8, 2013
    Assignee: Saudi Basic Industries Corporation
    Inventors: Zahir Bashir, Ian Macmillan Ward, Glen Peter Thompson, Anthony Paul Unwin
  • Patent number: 8337188
    Abstract: An apparatus for making a shingle, together with the shingle made thereby, is provided, in which one or more thermoplastic materials are extruded or co-extruded to form an extrudate, with the extrudate being cut into a preliminary shingle shape, which is allowed to dissipate heat, and then is delivered to a compression mold, wherein the preliminary shingle shape is compression molded to substantially its final dimensions and is then discharged from the mold and allowed to cool.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: December 25, 2012
    Assignee: CertainTeed Corporation
    Inventors: Thomas Kevin MacKinnon, Robert E. Dodd, Joong Youn Kim, Douglas H. Wylie
  • Patent number: 8328968
    Abstract: Disclosed herein are methods of preparing a composite sheet material having strength and barrier properties suitable for use as a housewrap, the methods comprising extrusion coating a polyolefin film layer onto a surface of an area-bonded, spunbond nonwoven substrate to form a composite sheet material, the composite sheet material having a grab tensile strength of at least 178 Newtons in at least one of the machine direction (MD) or the cross-machine direction (CD), and stretching the composite sheet material to impart to the composite sheet material a hydrostatic head of at least 100 cm, and a moisture vapor transmission rate (MVTR) of at least 35 g/m2/24 hr at 50% relative humidity and 23° C.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: December 11, 2012
    Assignee: Fiberweb, Inc.
    Inventors: Gary W. Anderson, Susannah D. Gelotte
  • Patent number: 8298465
    Abstract: Provided is a microporous film which is made of a thermoplastic resin composition comprising (a) 100 parts by mass of a polypropylene resin and (b) 5 to 90 parts by mass of a polyphenylene ether resin, and which has a sea island structure comprising a sea portion comprising the polypropylene resin as a principal component and an island portion comprising the polyphenylene ether resin as a principal component, wherein pores are formed at an interface between the sea portion and the island portion and within the sea portion.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: October 30, 2012
    Assignee: Asahi Kasei E-Materials Corporation
    Inventors: Kentaro Kikuchi, Hidetoshi Masugi
  • Publication number: 20120233965
    Abstract: A coextruded annealed gas-barrier heat-shrinkable packaging film suitable for flowpack or tray-lidding applications comprises a core EVOH layer (A), first and second outer polyolefin layers (B) and (C), and at least one inner layer (D) of a copolymer of propylene with butene and optionally also with ethylene, and is characterized by a maximum shrink force in the transverse direction £ 0.35 N/cm and by a residual shrink force in the range 0.11 to 0.22 N/cm. The film is obtained by coextrusion, optional irradiation, orientation and annealing at a temperature of from 70 to 90° C.
    Type: Application
    Filed: September 14, 2010
    Publication date: September 20, 2012
    Inventors: Marina Riccio, Roberto Forloni, Felice Ursino
  • Patent number: 8187683
    Abstract: An object of the present invention is to provide a multilayered polyamide-based tube for food packaging that is free from blocking in a Layer (C), and that has an excellent adherence to processed meat or like packaged food. The present invention provides a multilayered polyamide-based tube for food packaging comprising a Layer (A), a Layer (B) and a Layer (C); the multilayered polyamide-based tube having a low-temperature shrinkage ratio of 2 to 10%, and exhibiting heat shrinkage properties and gas barrier properties; the Layer (A) containing a polyamide-based resin; the Layer (B) containing a polyolefin-based resin; and the Layer (C) that comes in contact with the packaged food, the Layer (C) being a Layer (C-1) that contains a polypropylene-based resin having a heat distortion temperature (ISO 75B-1 or ISO 75B-2) of not less than 60° C. and a Vicat softening point of not less than 120° C.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: May 29, 2012
    Assignee: Gunze Limited
    Inventors: Hiroki Kuriu, Hiroyuki Yabuta
  • Patent number: 8182908
    Abstract: Microporous membranes having a relatively large average pore size, methods of making microporous membranes having a relatively large average pore size, and methods of using microporous membranes having a relatively large average pore size are disclosed.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: May 22, 2012
    Assignee: 3M Innovative Properties Company
    Inventor: James S. Mrozinski
  • Patent number: 8080310
    Abstract: A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising a plurality of microlayers. The ratio of the thickness of any of the microlayers to the thickness of the bulk layer ranges from about 1:2 to about 1:40.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: December 20, 2011
    Assignee: Cryovac, Inc.
    Inventors: Rafizi Ramli, Anton L. Timmons, Bradford E. Webster, John R. Wolf, Larry Bikle McAllister, Christopher Brown, George D Wofford
  • Publication number: 20110241245
    Abstract: A method of forming a confined crystallization multilayer film includes coextruding a plurality of first polymer layers and a plurality of second polymer layer to form a multilayer film wherein each first polymer layer is sandwiched between second polymer layers and axially orienting the multilayer film at a temperature below the melting temperature (Tm) of the second polymer layer and to a thickness such that each first polymer layer forms a high aspect ratio substantially crystalline lamellae.
    Type: Application
    Filed: April 15, 2011
    Publication date: October 6, 2011
    Inventors: ANNE HILTNER, Eric Baer, Yijian Lian, Joel Carr
  • Patent number: 8021759
    Abstract: The present invention is directed to a heat-shrinkable, thermoplastic film or bag which contains at least one homogeneous ethylene alpha-olefin copolymer having a density of at least 0.90 g/cc. Oriented films made in accordance with the present invention exhibit improved optics and improved impact resistance. A homogeneous ethylene alpha-olefin may be present in a monolayer film either alone or in a blend or may be included in one or more layers of a multilayer film in accordance with the present invention.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: September 20, 2011
    Assignee: Cryovac Inc.
    Inventors: Kelly R. Ahlgren, Robert Babrowicz, Solomon Bekele, Blaine C. Childress, Marvin R. Havens, Vincent W. Herran, Ronald D. Moffitt, Gautam P. Shah, George D. Wofford
  • Patent number: 8017052
    Abstract: A process and apparatus for making a shingle, together with the shingle made thereby, is provided, in which one or more thermoplastic materials are extruded or co-extruded to form an extrudate, with the extrudate being cut into a preliminary shingle shape, which is allowed to dissipate heat, and then is delivered to a compression mold, wherein the preliminary shingle shape is compression molded to substantially its final dimensions and is then discharged from the mold and allowed to cool.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: September 13, 2011
    Assignee: CertainTeed Corporation
    Inventors: Thomas Kevin MacKinnon, Robert E. Dodd, Joong Youn Kim, Douglas H. Wylie
  • Patent number: 8012572
    Abstract: A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising a plurality of microlayers. The ratio of the thickness of any of the microlayers to the thickness of the bulk layer ranges from about 1:2 to about 1:40.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: September 6, 2011
    Assignee: Cryovac, Inc.
    Inventors: Rafizi Ramli, Larry Bikle McAllister, Anton L. Timmons, Bradford E. Webster, John R. Wolf, Christopher Brown, George D. Wofford
  • Patent number: 7998385
    Abstract: A transparent multilayer stretched product is produced through a process including: providing a resin laminate including at least on layer of polyglycolic acid resin, heat-forming and cooling the resin laminate, reheating the resin laminate until the polyglycolic acid resin is crystallized to be opaque and then stretching the reheated resin laminate. The thus-obtained multilayer stretched product is excellent in gas-barrier property in addition to the transparency and is suitable as a packaging material or container.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: August 16, 2011
    Assignee: Kureha Corporation
    Inventors: Kazuyuki Yamane, Ryo Kato, Hisanori Tobita
  • Publication number: 20110189437
    Abstract: A thermoplastic film with a three-dimensionally structured outer surface is made by coextruding through a slit nozzle a multilayer molten plastic film having an outer layer formed of a thermoplastic polyurethane elastomer with an isocyanate additive and an inner layer. This multilayer film is compressed in a nip between a roll and a belt to emboss a three-dimensional structure into the outer layer. The roll is cooled to cool the film and set the three-dimensional structure in the outer surface of the outer layer.
    Type: Application
    Filed: April 21, 2010
    Publication date: August 4, 2011
    Inventors: Gruendken Marcel, Herbert Bader, Andreas Hagemann
  • Patent number: 7981492
    Abstract: Multilayer laminates useful in packaging of respiring food products and packages made therefrom. The laminates have a CO2 permeability rate of at least about 10 cm3/100 in2/24 hours and an O2 permeability rate of less than about 5.3 cm3/100 in2/24 hours.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: July 19, 2011
    Assignee: Exopack, LLC
    Inventor: Jay D. Hodson
  • Publication number: 20110171464
    Abstract: The invention relates to a sealable, biaxially oriented polyester film comprising a base layer B, a sealable cover layer A, and a non-sealable cover layer C. The invention further relates to a method for producing the film and to the use thereof.
    Type: Application
    Filed: September 3, 2009
    Publication date: July 14, 2011
    Inventors: Matthias Konrad, Bodo Kuhmann, Gottfried Hilkert, Herbert Peiffer
  • Publication number: 20110135221
    Abstract: The invention relates to a Flexible Intermediate Bulk Container (FIBC) having a body made of flexible woven fabric, and integral handling devices, wherein the fabric is woven from opaque oriented polyethylene terephthalate (PET) strips having a density of from 500 to 1300 kg/m3 and a tensile strength of at least 250 MPa. Advantages of said FIBC include directly printability with the usual type of inks, giving excellent contrast and good adhesion, without pre-treatment like a corona- or flame-treatment. The FIBC based on the PET fabric also shows higher gloss; better UV resistance; better mechanical properties, like high tensile strength and creep resistance; favourable abrasion resistance; and higher temperature resistance than a conventional big bag based on polypropylene strips. The invention further relates to such a FIBC based on stress-whitened PET tapes obtained by a special drawing process.
    Type: Application
    Filed: April 20, 2009
    Publication date: June 9, 2011
    Applicant: Saudi Basic Industries Corporation
    Inventors: Zahir Bashir, Ian Macmillian Ward, Glen Peter Thompson, Anthony Paul Unwin
  • Patent number: 7910032
    Abstract: The present invention provides an exemplary process for manufacturing a flexible packaging laminate into a pouch for containing liquids such as edible oil. The process includes taking granules of polypropylene and medium density polyethylene in a proportion of 1-1.5:1.5-2.5, —melting the granules at 200-230 degrees Celsius in a 3 layer blown film extruder to form a co-extruded film, —printing the film by a Rotogravure printing technique at 40-60 degrees Celsius, —laminating the printed film with a conventional 5 layer co-extruded nylon film at 60-80 degrees Celsius, —curing the laminated film at 35-45 degrees Celsius for at least 2 days, —and slitting the cured laminated film to a desired size for using with a Form Fill Seal machine (FFS Machine) at 160-180 degrees Celsius, to make pouches that hold liquids, such as edible oil.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: March 22, 2011
    Assignee: Cargill India Private Limited
    Inventor: Mukul Kumar
  • Publication number: 20100327480
    Abstract: A method of co-extrusion is used to prepare a thermal imaging element such as a thermal dye receiver element. In this method, two or three of an image receiving layer, an antistatic tie layer, and a compliant layer are co-extruded and these co-extruded multiple layers can be disposed on a support to provide a smooth outer surface and reduced delamination among layers especially in a high humidity environment.
    Type: Application
    Filed: June 24, 2009
    Publication date: December 30, 2010
    Inventors: Narasimharao Dontula, Somsack Chang, Brian Thomas
  • Publication number: 20100227136
    Abstract: A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising a plurality of microlayers. The ratio of the thickness of any of the microlayers to the thickness of the bulk layer ranges from about 1:2 to about 1:40.
    Type: Application
    Filed: March 6, 2009
    Publication date: September 9, 2010
    Inventors: Rafizi Ramli, Larry Bikle McAllister, Anton L. Timmons, Bradford E. Webster, John R. Wolf, Christopher Brown, George D. Wofford
  • Patent number: 7785510
    Abstract: A process and apparatus for making a shingle, together with the shingle made thereby, is provided, in which one or more thermoplastic materials are extruded or co-extruded to form an extrudate, with the extrudate being cut into a preliminary shingle shape, which is allowed to dissipate heat, and then is delivered to a compression mold, wherein the preliminary shingle shape is compression molded to substantially its final dimensions and is then discharged from the mold and allowed to cool.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: August 31, 2010
    Assignee: CertainTeed Corporation
    Inventors: Thomas Kevin MacKinnon, Robert E. Dodd, Joong Youn Kim, Douglas H. Wylie
  • Patent number: 7678444
    Abstract: The present invention provides articles comprising a thermoformable composite comprising: a core comprising a renewable polymer having: (a) a Ts value of up to about 90° C.; and (b) a heat distortion index of up to about 90° C.; and a heat-resistant outer layer substantially surrounding the core and comprising a heat-resistant polymer having: (a) a Ts of greater than about 60° C.; and (b) a heat distortion index of greater than about 50° C.; wherein the renewable polymer comprises at least about 60% by weight of the composite, and wherein the heat-resistant polymer has a Ts value and heat distortion index greater than that of the renewable polymer. The present invention also provides methods for coextruding the heat-resistant polymer outer layer and renewable polymer core to provide a thermoformable composite.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: March 16, 2010
    Assignee: International Paper Company
    Inventors: Richard A. Tedford, Jr., Wei Li
  • Patent number: 7678316
    Abstract: A method that includes coextruding two or more thermoplastic resin streams through a profiled die plate, which die plate is shaped to form a nonplanar film (three dimensional) preferably with a regularly oscillating peak and valley structure that oscillates from a top surface to a bottom surface forming longitudinally extending ridges on both faces of the film. The film is formed by coextruding the film through the oscillating die plate opening causing partitioning of the resins in different zones in the width direction of the film. Flattening of the film results in a film with side-by-side zones formed of different polymers or relative proportions of polymers.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: March 16, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Ronald W. Ausen, Janet A. Venne, Jayshree Seth
  • Publication number: 20100055429
    Abstract: A monoaxially oriented film including heat sealable layer including an ethylene-propylene impact copolymer and a metallocene-catalyzed propylene-butene elastomer. The heat sealable layer may include a metallocene-catalyzed ethylene-butene elastomer. The film is oriented at least 4 times in the machine direction and exhibits excellent linear directional tear properties in the machine direction and excellent heat seal performance. This film formulation and orientation is suitable for pouch applications requiring an “easy-tear” linear tear feature and excellent hermetic seal properties, particularly for retort pouches.
    Type: Application
    Filed: August 17, 2009
    Publication date: March 4, 2010
    Applicant: TORAY PLASTICS (AMERICA), INC.
    Inventors: Mark S. Lee, Harold E. Koehn, Emilio Coletta, Matthew H. Brown
  • Publication number: 20100026987
    Abstract: A primary object of the present invention is to provide a multilayer heat-shrinkable styrene-based film that makes it possible, even when the film is transparent, to confirm that the film is correctly applied on a drink bottle and the like as a label. The present invention provides a heat-shrinkable styrene-based film having at least one layer containing a styrene-based resin containing a copolymer b1 of 98 to 40% by weight vinyl aromatic hydrocarbon and 2 to 60% by weight aliphatic unsaturated carboxylic acid ester, and/or a block copolymer b2 of 70 to 85% by weight vinyl aromatic hydrocarbon and 15 to 30% by weight conjugated diene hydrocarbon, and a fluorescent brightening agent in an amount of 100 to 2,000 weight ppm with respect to the total weight of the styrene-based resin. The present invention also provides a heat-shrinkable film having a three-layer structure containing front and back layers and a core layer, wherein the above-mentioned copolymer b1 and/or copolymer b2 forms the core layer.
    Type: Application
    Filed: November 30, 2007
    Publication date: February 4, 2010
    Applicant: Gunze Limited
    Inventors: Masaharu Maruo, Akira Morikawa, Naoki Ohno, Tadayoshi Tanaka