Stretching Or Stretch Forming Patents (Class 264/291)
  • Publication number: 20100001433
    Abstract: The invention relates to a method for obtaining high-tenacity aramid yarn, wherein the yarn is made of a copolymer obtained from a mixture of monomers comprising DAPBI, an aromatic para-diamine, and an aromatic para-diacid, wherein the yarn is heated in at least two process steps, characterized in that in a first step the yarn is heated at a temperature of 200 to 360° C. at a tension of at least 0.2 cN/dtex, followed by a second step wherein the yarn is heated at a temperature of 370 to 500° C. at a tension of less than 1 cN/dtex. The invention further pertains to a multifilament aramid yarn spun from a sulfuric acid spin dope and having a tenacity of at least 2500 mN/tex.
    Type: Application
    Filed: November 19, 2007
    Publication date: January 7, 2010
    Applicant: TEIJIN ARAMID B.V.
    Inventors: Hanneke Boerstoel, Johannes Bos, Adriaan Anton Schaap, Dennis Wilbers, Leonardus Antonius Godfried Busscher, Antonius Henricus Maria Schotman, Kurt Rainer Hans-Heinrich Stolze
  • Publication number: 20100002170
    Abstract: A long obliquely stretched film is obtained having an orientation axis in a direction with an angle ?s of 10° or more and 85° or less from a width direction by grasping both side ends in the width direction of a longitudinally stretched film with an average retardation Re1 by grasping means; stretching the film under a condition that a long obliquely stretched film sample with an average retardation Re2 (Re2 is smaller than Re1) can be obtained and traveling speeds of the grasping means are substantially equal at the film both side ends through a preheating zone, a stretching zone and a fixing zone; releasing the both side ends of the film from the grasping means; and taking it up around a winding core.
    Type: Application
    Filed: November 28, 2006
    Publication date: January 7, 2010
    Applicant: ZEON CORPORATION
    Inventors: Motohiro Itadani, Takashi Sato
  • Publication number: 20090324918
    Abstract: A transparent high density polyethylene (HDPE) sheet is disclosed. The sheet has a thickness greater than or equal to 0.05 mm and a bulk haze less than 2%. The HDPE resin is converted into a sheet by thermal processing and the sheet is then uniaxially oriented at a temperature above the melting point of the HDPE resin. The transparent HDPE sheet of the invention can be used for windows and plastic containers.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Eike Kretzschmar, Michael D. Wolkowicz, Johannes-Friedrich Enderle, Dieter Lilge
  • Publication number: 20090321989
    Abstract: A process for the production of a composition for screening solar radiation which comprises a transparent polymer incorporating an interference pigment comprising a platelet shaped material is disclosed, which process comprises the steps of incorporating the interference pigment into the polymer, and then stretching the resultant polymer in at least one direction to at least twice its original length in that direction. The resultant composition has improved radiation screening properties.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 31, 2009
    Applicant: Ineos Manufacturing Belgium NV
    Inventor: Yves-Julien Lambert
  • Publication number: 20090305015
    Abstract: The agricultural film of the present invention includes a monolayer and multilayer embodiment wherein a first layer is composed of at least one polyolefin polymer wherein the film has a thickness of from about 0.1-10 mils and the film is formed by chill cast extrusion. A method for making the agricultural film of the present invention is also provided.
    Type: Application
    Filed: September 1, 2004
    Publication date: December 10, 2009
    Applicant: PLIANT CORPORATION
    Inventors: Jodi Fleck-Arnold, Mark Jordan, Emit Stover
  • Publication number: 20090294458
    Abstract: The present invention provides a foamed film for shrink labels which is capable of being accommodated by the new continuous attachment system for shrink labels, and in which a long foamed film for shrink labels is wound around the body of a container, and is cut at the inner-position where the film overlaps, after which the two ends of the resulting film unit are joined together to form a cylindrical shape, and this is subsequently heated to cause heat shrinkage of the film and to produce the label. The foamed film for shrink labels of the present invention is a film which stretches a blown film with an expansion ratio of 1.3 to 5 in the longitudinal direction (vertical direction or extrusion direction) so that the draw ratio is 1.5 to 4.0, which has properties such as a thickness of 120 to 300 ?m, a tensile elastic modulus of 80 to 500 MPa, a static friction coefficient of 0.3 to 0.8, a coefficient of shrinkage of 15% or more at 90° C. and 30% or more at 120° C., and which is foamed and has shrinkability.
    Type: Application
    Filed: September 21, 2006
    Publication date: December 3, 2009
    Applicant: NISSEI INDUSTRIAL CO., LTD.
    Inventors: Ryouji Tanaka, Toshio Taka
  • Publication number: 20090297820
    Abstract: A film, for use in a label and a related method, including a print skin layer, a base layer, and an adhesive skin layer having at least one heat-activated thermoplastic polymer. The film is stretched biaxially in both a machine direction and a transverse direction. The stretch ratio in a first direction is greater than 2:1 to 10:1, the stretch ratio in a second direction ranges in value from 1.02:1 to 1.8:1, the film has an ASTM D1204 shrinkage at 100° C. of at least 0.5% in both the machine and transverse directions, and the film has an ASTM D882 2% secant modulus of at least 679,134 kPa (98,500 psi) in the first direction.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 3, 2009
    Applicant: AVERY DENNISON CORPORATION
    Inventors: John E. KOVALCHUK, Moris AMON
  • Publication number: 20090290100
    Abstract: A method of producing a cellulose derivative film, the method comprising: forming a film with a solvent cast method from a dope including a cellulose derivative satisfying following conditions (a) and (b): (a) at least one among three hydroxyl groups included in a glucose unit of cellulose is substituted by a substituent of which a polarizability anisotropy ?? represented as following Expression (1) is 2.5×10?24 cm3 or higher: Expression (1): ??=?x?(?y+?z)/2, wherein ?x, ?y and ?z is as defined in the specification; and (b) when a substitution degree by a substituent of which ?? is 2.5×10?24 cm3 or higher is PA, and a substitution degree by a substituent of which ?? is lower than 2.5×10?24 cm3 is PB, the PA and PB satisfy following Expressions (3) and (4): Expression (3): 2PA+PB>3.0; and Expression (4): PA>0.2.
    Type: Application
    Filed: November 24, 2006
    Publication date: November 26, 2009
    Applicant: FUJIFILM CORPORATION
    Inventors: Hiromoto Haruta, Osamu Takahashi, Yutaka Nozoe, Nobutaka Fukagawa, Mitsuyoshi Ichihashi, Hiroaki Sata, Tadashi Omatsu, Masaki Okazaki
  • Patent number: 7618572
    Abstract: A method and apparatus for manufacturing load bearing fabric structures in which the peripheral edge of the load bearing fabric terminates with the mold cavity. The apparatus includes a stretching assembly for stretching the fabric, a fabric retaining assembly for holding the fabric in the stretched condition and a mold assembly for molding the frame about the periphery of the fabric.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: November 17, 2009
    Assignee: Illinois Tool Works Inc.
    Inventor: Timothy P. Coffield
  • Publication number: 20090277141
    Abstract: First, a mixture of a polytetrafluoroethylene fine powder and a liquid lubricant into a sheet-form body extending in a first direction. Next, the liquid lubricant is removed from the sheet-form body. Then, the sheet-form body is stretched by a factor of 40 to 250 in the longitudinal direction at a temperature equal to or higher than a melting point of polytetrafluoroethylene, and the stretched sheet-form body is further stretched by a factor of 3 to 40 in the width direction. Thus, a highly air-permeable porous polytetrafluoroethylene membrane is obtained.
    Type: Application
    Filed: April 16, 2009
    Publication date: November 12, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yuuichi ABE, Masaaki MORI, Kousei TAKIISHI
  • Publication number: 20090264638
    Abstract: An unstretched cellulose acylate film is stretched in a ratio ranging from 1.05 to 1.6 in the longitudinal direction (MD) in a longitudinal stretching section using at least two rollers having a surface-to-surface separation of 2 to 50 mm therebetween and being different in circumferential velocity, thereafter the cellulose acylate film stretched in the longitudinal direction is heated in the heat treatment section to a temperature ranging from Tc to Tc+80° C. under the conditions that the widthwise ends of the cellulose acylate film are gripped, and thus the cellulose acylate film is contracted in the widthwise direction (TD) to produce the intended cellulose acylate film. This method can provide a cellulose acylate film having properties suitable for an optical film and so on.
    Type: Application
    Filed: February 12, 2009
    Publication date: October 22, 2009
    Applicant: FUJIFILM CORPORATION
    Inventor: Masaaki Otoshi
  • Publication number: 20090261503
    Abstract: Clipping both right and left side edge parts of a sheet or film by right and left pitch-variable clips having flow-directional clip pitches variable along with travel movements, respectively, having positions (AR, AL) for initiation of enlargements of flow-directional clip pitches changed between right clips and left clips, and enlarging flow-directional clip pitches along with travel movements of clips to thereby make an oblique stretch.
    Type: Application
    Filed: July 17, 2007
    Publication date: October 22, 2009
    Inventors: Takayoshi Sano, Satoru Nitta, Hiromu Saijyo
  • Publication number: 20090250838
    Abstract: Provided is a method for manufacturing a high-quality porous film. Here, while the porous film is being manufactured through forming micropores by stretching, a raw film is prevented from slipping on the surfaces of the respective rolls as much as possible even though the raw film includes oil or liquid paraffin as a solvent. The method is for manufacturing a porous film through forming micropores by successive biaxial stretching. A tensile force applied to the raw film F transferring from the longitudinal stretching machine (10) to the transverse stretching machine (50) is set not less than a stretching force necessary for the longitudinal stretching, and thus the raw film is prevented from slipping on a contact surface between the raw film and each roll of the longitudinal stretching machine (10).
    Type: Application
    Filed: April 3, 2009
    Publication date: October 8, 2009
    Inventors: TAKAYOSHI SANO, Satoru Nitta
  • Publication number: 20090233041
    Abstract: A crosslaminate is formed from two oriented plies of thermoplastic polymer material, arranged so that their orientation directions cross one another, the plies being heat sealed together. Each ply is semi-fibrillated, that is consist of linear thin regions of biaxially oriented material and thicker linear bosses between the thinner regions. The webs are sealed primarily through bonds formed at the intersection of the bosses (thicker regions). The array of bosses has a division less than 2 mm. The laminate has improved aesthetic and strength properties. A method for forming the crosslaminate involves segmental stretching of the material to form the thinner regions, and apparatus comprising intermeshing grooved stretching rollers having sharp-edged crests is described.
    Type: Application
    Filed: May 11, 2006
    Publication date: September 17, 2009
    Inventor: Ole-Bendt Rasmussen
  • Publication number: 20090233008
    Abstract: Cellulose acylate grains having a heat quantity of crystalline fusion of at most 10 J/g. A film prepared by melt-casting the grains is free from the problem of yellowing when built in liquid-crystal display devices.
    Type: Application
    Filed: December 21, 2006
    Publication date: September 17, 2009
    Applicant: FujiFilm Corporation
    Inventors: Satoshi Higuchi, Akihiro Matsufuji, Tetsuya Yoshida, Yasutomo Goto, Kiyokazu Hashimoto
  • Publication number: 20090220758
    Abstract: A method for producing a retardation film comprising the steps of: (a) uniaxially stretching an original film for producing retardation film in one direction at either a temperature T1 or T2; and then (b) uniaxially stretching the film stretched in the step (a) in a direction perpendicular to the above-mentioned direction of stretching at a temperature T2 or T1 different from the above-mentioned temperature, in which the original film for producing retardation film has a characteristic that a phase of linearly polarized light entering vertically into the film plane and having an oscillating surface of an electric vector in an X-Z plane against linearly polarized light entering vertically into the film plane and having an oscillating surface of an electric vector in a Y-Z plane lags by uniaxially stretching in the direction of the X axis at a temperature T1, and leads by uniaxially stretching in the direction of the X axis at a temperature T2 different from the above-mentioned temperature T1, in which the X ax
    Type: Application
    Filed: February 13, 2009
    Publication date: September 3, 2009
    Applicant: ZEON CORPORATION
    Inventor: Taku HATANO
  • Patent number: 7582236
    Abstract: A clip to hold the film has a clip body, a flapper, a press slider and a rail mount. A pair of the press sliders is located in both sides of the flapper. A coil spring presses the press slider upward. A pair of entrance side film release members, provided in the tenter entrance, presses the press slider downward to press the lateral edge portions of the film by the press sliders. At the film hold position, the flapper rotates from a release position to a hold position to hold the film, and the flapper is kept at the hold position by a torsion spring. The flapper holds the film 26 after the press slider holds the lateral edge portions of the film, so the flapper can hold the film even when the lateral edge portions of the film are curled.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: September 1, 2009
    Assignee: FUJIFILM Corporation
    Inventors: Hidekazu Yamazaki, Sadanobu Fujimoto, Toshinao Arai
  • Publication number: 20090214821
    Abstract: A multi-axial geogrid possesses a series of interconnected strands or ribs that are arranged along at least two different axes within the plane of the structure. The strands or ribs have an aspect ratio, defined as the ratio of the thickness to width, of greater than 1.0, thickness being the direction normal to the plane of the structure. The geogrid can be manufactured by modifying the process parameters in order to create high aspect ratio ribs, using any of the various known methods for producing geogrids. A reinforced civil engineering structure, and method therefor, is formed by embedding in soil one or more horizontal layers of geogrid having high aspect ratio ribs. The reinforced structure shows improved rutting performance when subjected to vehicular traffic.
    Type: Application
    Filed: February 11, 2009
    Publication date: August 27, 2009
    Inventor: Anthony T. Walsh
  • Publication number: 20090208682
    Abstract: A film layer is disclosed that is capable of shrinking when subjected to energy, such as heat. The film layer, for instance, can be formed and then stretched in one or two directions at a relatively low temperature. In particular, the film is stretched while the film layer is at a temperature near the glass transition temperature of the polymer used to form the film. Drawing the film at a relatively low temperature has been found to improve the shrink properties of the film. In one embodiment, the film layer is comprised of a non-modified polyester, such as polyethylene terephthalate. For example, the polyethylene terephthalate can be made by reacting terephthalic acid with ethylene glycol or polyethylene glycol.
    Type: Application
    Filed: November 17, 2008
    Publication date: August 20, 2009
    Applicant: Mitsubishi Polyester Film, Inc.
    Inventors: Jose Alfaro, Robert W. Finke, Ghulam Mustafa A. Sange
  • Publication number: 20090208842
    Abstract: A separator having a fine porous structure and including a polyolefin thermoplastic resin and a block copolymer as constituent materials is provided. The block copolymer including a monomer unit derived from a polyolefin resin and a monomer unit derived from a polymer component, The polyolefin resin has a melting point lower than that of the polyolefin thermoplastic resin, the polymer component being incompatible with polyolefin.
    Type: Application
    Filed: February 10, 2009
    Publication date: August 20, 2009
    Applicant: SONY CORPORATION
    Inventors: Tamotsu Harada, Toru Odani, Nobuyuki Ohyagi, Kensuke Yamamoto
  • Publication number: 20090155458
    Abstract: A method for preparing a flexible film substrate with a low glass transition temperature can be used in the production of an article that retains dimensions and improves the surface smoothness after high temperature processing. The invention, for example, would enable low temperature films such as PET and PEN to be dimensionally stable and ultra flat at conditions commonly used in electronic processing which can typically exceed 200° C. More specifically, the methods enable the use of e.g. barrier films based on PET or PEN in OLED/PLED manufacturing.
    Type: Application
    Filed: February 7, 2007
    Publication date: June 18, 2009
    Inventors: Mark A. Roehrig, Yufeng R. Liu, Robert W. Peterson
  • Publication number: 20090130341
    Abstract: A lengthy stretched film made of a thermoplastic resin, having, over the width direction of at least 1300 mm, a value of an orientation angle ? to a take-up direction in a range of 40° to 50° and fluctuation thereof of 1.0° or less, and a value of an average Nz coefficient in a range of 1.3 to 2.0 and fluctuation thereof of 0.10 or less. A lengthy circularly polarizing plate constituted by laminating the lengthy stretched film with a lengthy polarizer. A reflective display type liquid crystal display device provided with the circularly polarizing plate constituted by trimming the lengthy circularly polarizing plate to a desired size.
    Type: Application
    Filed: March 26, 2007
    Publication date: May 21, 2009
    Inventor: Takeshi Asada
  • Publication number: 20090127741
    Abstract: A process produces polyester film which is effectively reduced in the disadvantageous lengthwise and widthwise heat shrinkages inherent in biaxially oriented film and which is excellent in flatness and mechanical characteristics. More specifically, process produces biaxially oriented polyester film by subjecting a biaxially oriented polyester film which has been drawn in the lengthwise and widthwise directions and heat-treated to widthwise relaxation and lengthwise relaxation by a method of shortening the clip intervals, wherein the biaxially oriented polyester film is held under stretching between the widthwise relaxation step and the lengthwise relaxation step.
    Type: Application
    Filed: June 6, 2006
    Publication date: May 21, 2009
    Applicant: Toray Industries, Inc. a corporation of Japan
    Inventors: Koji Kurouji, Tsutomu Kurihara, Noaki Kawaji
  • Publication number: 20090127742
    Abstract: A process for simultaneously activating two or more portions of a web in different directions. The process involves feeding a web into an apparatus that includes a pair of intermeshing activation rolls having three dimensional surface features configured to simultaneously activate different portions a web in different directions. The three dimensional surface features are arranged in discrete regions on the rolls such that at least two of the regions provide different directions of activation. The rolls include one or more buffer regions positioned between the discrete regions on the roll that provide different directions of activation.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 21, 2009
    Inventors: Khalid Qureshi, Fred Naval Desai
  • Patent number: 7534318
    Abstract: A textured, layered mold-formed body is produced with a foil laminate in which a top foil of at most partially crosslinked polymer materials and a sub-foil containing a polymer foam material with a density between 35 and 120 grams per liter and a gel content of less than 80 percent are laminated together. The foil laminate is embossed with a texture and treated with electron beams to give the texture enough stability for a subsequent deep-drawing step in which the mold-formed body is produced.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: May 19, 2009
    Inventors: Jürgen Bühring, Volker J. Hülsewede, Rainer Ohlinger, Burkhard Schäfer
  • Publication number: 20090122237
    Abstract: A polymer film, which comprises: organic compound fine particles containing a retardation developer and having an average particle size of from 1 nm to 1,000 nm; a method for producing a polymer film, which comprises: casting a dope containing a polymer, a solvent for dissolving the polymer, a retardation developer and an additive other than the retardation developer on a support; peeling off; drying; and stretching, wherein the retardation developer is uniformly dissolved in the dope, and between the casting and the stretching, organic compound fine particles containing the retardation developer are formed within a film; and an optical film, which comprises: at least one compound represented by formula (I) as defined in the specification; and at least one Rth raising agent.
    Type: Application
    Filed: November 2, 2006
    Publication date: May 14, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Nobutaka Fukagawa, Shigeki Uehira, Yutaka Nozoe, Mamoru Sakurazawa, Susumu Sugiyama, Teruki Niori
  • Publication number: 20090117362
    Abstract: The invention relates to A bi-axially stretched breathable film comprising a polymeric mixture, said polymeric mixture comprising based on the total weight of the polymeric mixture/—at least 50% of at least one polyether block copolymer; and—from 0.5 to less than 50% of at least one polyester. The invention also relates to a method to manufacture said film, and uses of said film. The invention also relates to a method for producing a bi-axially stretched breathable film comprising at least one polyether block copolymer.
    Type: Application
    Filed: August 25, 2006
    Publication date: May 7, 2009
    Inventors: Lucien Schosseler, Alexis Grosrenaud, Duncan Henry MacKerron, Valery Rebizant
  • Publication number: 20090115100
    Abstract: The present invention provides a method for producing a thermoplastic film which makes it possible to improve the optical properties of the thermoplastic film obtained by stretching and a thermoplastic film manufactured thereby. The transverse stretching section in which a cellulose acylate film is transversely stretched includes: a preheating zone, a transverse stretching zone, a cooling zone and a thermal relaxation zone, and the cellulose acylate film having been cooled in the cooling zone is immediately subjected to thermal relaxation treatment in the thermal relaxation zone.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 7, 2009
    Applicant: FUJIFILM CORPORATION
    Inventors: Shinichi Nakai, Masaaki Otoshi, Akihide Fujita
  • Publication number: 20090098786
    Abstract: A polypropylene resin having: (1) a melt flow rate (MFR) of 6 to 100 g/10 minutes, (2) a molecular weight distribution (Mw/Mn), measured by gel permeation chromatography, of 3 to 6, and (3) a 116° C. non-eluted component content (100-W116(%)) of 50% or more and a content of components eluted at 90° C. or less (W90) of 10 to 30%, measured by temperature-rising fractional chromatography (TREF).
    Type: Application
    Filed: October 31, 2005
    Publication date: April 16, 2009
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Takeharu Tajima, Toshitaka Kanai, Tomoaki Takebe, Hiroshi Minami
  • Publication number: 20090081387
    Abstract: A method of producing a cyclic polyolefin film comprising: dissolving or dispersing a cyclic polyolefin resin and at least one compound selected from a higher fatty acid and a derivative of the higher fatty acid in a solvent; a casting step; a drying step; and a taking-up step; and a method of preparing a liquid dispersion of fine particles, which comprises: subjecting fine particles, an organic solvent and a dispersant to a dispersing treatment, wherein the dispersant contains a cyclic olefin resin.
    Type: Application
    Filed: September 13, 2006
    Publication date: March 26, 2009
    Applicant: FUJIFILM Corporation
    Inventor: Masaya Suzuki
  • Publication number: 20090075168
    Abstract: A pouch for battery and a pouch type secondary battery, and more particularly, to a pouch for a battery having a space for containing an electrode assembly, the space being previously formed in a vessel form, and a pouch type secondary battery using the same. The pouch of the battery includes a vessel type bottom having a bottom surface and lateral surfaces; and a cover type top for covering an upper opening of the vessel type bottom, wherein a chamfer or step structure is formed at some of the adjoining portions of the bottom surface and the lateral surface, and the chamfer or step structure is viewed in cross section cut off along a plane which is perpendicularly to the bottom surface and approximately parallel to one surface of lateral surfaces. And the electrode assembly is contained by the pouch of battery to constitute a pouch type secondary battery according to the present invention.
    Type: Application
    Filed: September 12, 2008
    Publication date: March 19, 2009
    Inventor: Youngwoo Lee
  • Publication number: 20090075545
    Abstract: A method and system for aligning nanotubes within an extensible structure such as a yarn or non-woven sheet. The method includes providing an extensible structure having non-aligned nanotubes, adding a chemical mixture to the extensible structure so as to wet the extensible structure, and stretching the extensible structure so as to substantially align the nanotubes within the extensible structure. The system can include opposing rollers around which an extensible structure may be wrapped, mechanisms to rotate the rollers independently or away from one another as they rotate to stretch the extensible structure, and a reservoir from which a chemical mixture may be dispensed to wet the extensible structure to help in the stretching process.
    Type: Application
    Filed: July 9, 2008
    Publication date: March 19, 2009
    Inventors: David S. Lashmore, Robert Braden, Anastasios John Hart, John Welch
  • Publication number: 20090042005
    Abstract: A thermoplastic film is transversely stretched, and then transported in a heat-treating zone (46) such that the ratio (GID) of an inter-roll distance (G) to a roll lap length (D) is 0.01 to 3, and the ratio (V2/V1) of an exit-side transporting speed (V2) to an entry-side transporting speed (V1) is 0.6 to 0.999. The thermoplastic film is heat-treated in the heat-treating zone (46) at (Tg?20)° C. to (Tg+50)° C., in which Tg is the glass transition temperature of the film. The heat-treated thermoplastic film exhibits an Rth/Re ratio of at least 0.5 and less than 1, an Rth/Re ratio range of 0.01 to 0.1 in the width direction, and a thermal dimensional change of 0.001% to 0.3% under conditions of 80° C. and 200 hours.
    Type: Application
    Filed: April 17, 2008
    Publication date: February 12, 2009
    Applicant: FUJIFILM CORPORATION
    Inventors: Kizyokazu Hashimoto, Tetsuya Yoshida, Masaaki Otoshi
  • Publication number: 20090036971
    Abstract: Single, continuous PTFE layers having lateral zones of varied characteristics are described. Some of the lateral zone embodiments may include PTFE material having little or no nodal and fibril microstructure. Methods of manufacturing PTFE layers allow for controllable permeability and porosity of the layers, in addition to other characteristics. The characteristics may vary from one lateral zone of a PTFE layer to a second lateral zone of a PTFE layer. In some embodiments, the PTFE layers may act as a barrier layer in an endovascular graft or other medical device.
    Type: Application
    Filed: October 14, 2008
    Publication date: February 5, 2009
    Applicant: Trivascular2, Inc.
    Inventors: Joseph W. Humphrey, Jeffry B. Skiba
  • Publication number: 20090029129
    Abstract: An antistatic article having an antistatic layer disposed on a substrate is disclosed herein. The antistatic layer is formed from a cationic copolymer, a non-cationic (meth)acrylic polymer, and a crosslinking agent. The cationic copolymer consists essentially of a cationic monomer, a hydrophobic monomer, a crosslinkable monomer, and an optional nitrogen-containing monomer. The substrate may comprise an optical film such as a multilayer optical film. Methods for making the antistatic article and display devices containing the antistatic article are also disclosed.
    Type: Application
    Filed: July 23, 2007
    Publication date: January 29, 2009
    Inventors: Mark J. Pellerite, Mahfuza B. Ali, Eileen M. Haus, Gregory F. King, James E. Lockridge, Hang K. Loi, Jeffrey A. Peterson
  • Publication number: 20090022970
    Abstract: A dope containing TAC is cast onto a belt. When having self-supporting properties, the dope is peeled as a wet film (46) from the belt, and transported into a tenter dryer (60). A preheating is made in an entrance section (80), and a stretching is made in a stretching section (81). In a relaxation section (82), the width of the film was becomes shorter, and in the exit section (83), the width was kept to be uniform and transported from the tenter dryer (60) as a film (61).
    Type: Application
    Filed: January 24, 2006
    Publication date: January 22, 2009
    Applicant: FUJIFILM Corporation
    Inventor: Hiroshi Miyachi
  • Publication number: 20090020913
    Abstract: A dope made from TAC, additives and solvent is cast onto a belt to form a casting film. When having self-supporting property, the casting film is peeled from the belt as a wet film (120) and transported into a tenter dryer (17). The wet film (120) is stretched in its widthwise direction in a stretch area (131) and relaxed in the widthwise direction in a relaxation area (132). When a stretch rate of the width of the wet film (120) after being held for 0.
    Type: Application
    Filed: March 17, 2006
    Publication date: January 22, 2009
    Applicant: FUJIFILM Corporation
    Inventor: Satoshi Sakamaki
  • Publication number: 20080319116
    Abstract: Polyolefin block and graft copolymers comprised of two or more semicrystalline polyolefin blocks or grafts and one or more amorphous polyolefin blocks can be blended with a low molecular weight fluid diluent that preferentially locates within and swells the amorphous domains of the block or graft copolymer, while preserving the crystallinity of the semicrystalline block domains. After mechanical or thermomechanical processing, such compositions combine softness with high strength and high recoverable elasticity. Compositions are also disclosed whereby the diluent species is removed from the composition, either before or after the mechanical or thermomechanical processing, in order to create a strong elastic material with an ultra-low entanglement density within the amorphous domains.
    Type: Application
    Filed: April 8, 2008
    Publication date: December 25, 2008
    Inventors: Glenn H. Fredrickson, Edward J. Kramer, Zhigang Wang
  • Publication number: 20080308974
    Abstract: The present invention provides electroactive polymers, transducers and devices that maintain pre-strain in one or more portions of an electroactive polymer. Electroactive polymers described herein may include a pre-strained portion and a stiffened portion configured to maintain pre-strain in the pre-strained portion. One fabrication technique applies pre-strain to a partially cured electroactive polymer. The partially cured polymer is then further cured to stiffen and maintain the pre-strain. In another fabrication technique, a support layer is coupled to the polymer that maintains pre-strain in a portion of an electroactive polymer. Another embodiment of the invention cures a polymer precursor to maintain pre-strain in an electroactive polymer.
    Type: Application
    Filed: August 19, 2008
    Publication date: December 18, 2008
    Applicant: SRI International
    Inventors: Qibing Pei, Ronald E. Pelrine, Marcus Rosenthal
  • Publication number: 20080237913
    Abstract: A rear end portion of a leading TAC film and a front end portion of a following TAC film are connected using a double-sided adhesive tape and acetone, in order to stretch the TAC films continuously in a tenter. The double-sided adhesive tape is constituted of a base whose material is same as the TAC film and an adhesive layer coated on both surfaces of the base. Acetone is one of solvents used for preparing a dope in the TAC film production. The double-sided adhesive tape is firstly stuck on an upper surface of the rear end portion of the leading TAC film. Acetone is then applied, using a spray, on coating areas of the rear end portion of the leading TAC film. After that, the front end portion of the following TAC film is layered on the rear end portion of the leading TAC film, and the films are pressed and connected.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 2, 2008
    Applicant: FUJIFILM Corporation
    Inventor: Shinsuke Aoshima
  • Publication number: 20080237928
    Abstract: A casting dope is cast onto a casting belt to form a casting film, and then the casting film is peeled as a wet film from the casting belt. The wet film is guided through a transfer area toward a tenter drying device. In the tenter drying device, a tenter performs sequentially the drying, the stretching and the relaxation of the wet film during transporting the wet film. On the wet film, a bowing phenomena occurs by the relaxation to generate a first disorientation of an optical axis, and therefore the orientation of slow axed becomes not uniform. The stretching provide a second disorientation of the optical axis so as to cancel the first disorientation. Thus in the obtained film, the nonuniformity of the orientation of the slow axes is reduced.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 2, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Kimito Washiya, Tomoaki Nagahara
  • Publication number: 20080224352
    Abstract: In a solution casting system, a casting die causes dope containing polymer and solvent to flow. A casting support belt is disposed movably under the casting die, for forming cast film from the dope being cast. A stripping roller strips the cast film having a self-supporting property to form self-supporting cast film. A first dryer stretches the self-supporting cast film, and while the self-supporting cast film is stretched, applies first gas with temperature T2 to the self-supporting cast film containing the solvent, to evaporate the solvent therefrom. A second dryer, after the self-supporting cast film is stretched, applies second gas with temperature T3 to the self-supporting cast film containing the solvent, to evaporate the solvent therefrom for obtaining polymer film. The first and second dryers satisfy a condition of: 0<T2?T3<50. Also, a tentering machine contains the first and second dryers to stretch the self-supporting cast film.
    Type: Application
    Filed: March 11, 2008
    Publication date: September 18, 2008
    Applicant: FUJIFILM CORPORATION
    Inventors: Yoshiaki NARUKAWA, Yoshitomo TERUI
  • Publication number: 20080213507
    Abstract: A polymer film has a coefficient of fluctuation in degree of out-of-plane orientation of a polymer molecular chain in a thickness direction of the film as represented by the following numerical expression (1) as defined herein of from 15% to 80%.
    Type: Application
    Filed: October 16, 2007
    Publication date: September 4, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Nobutaka Fukagawa, Mitsuo Yoshikane
  • Publication number: 20080193783
    Abstract: A polyester stretch film having good tear property and good twistability, which is useful as a packaging film or a film for tape, as well as for stick packaging, PTP packaging, drug bag, folding packaging, and lid material is provided without losing heat resistance, cold resistance, moisture-proof properties, transparency, aroma retention and the like. This polyester resin film is produced by a method that includes mixing not less than two kinds of polyester resin starting materials having different melting points and extruding the mixture. The respective starting materials are cast in different extruders, melted, supplied to one mixer in a molten state, mixed and extruded to give a sheet, and the sheet is stretched at least in the monoaxial direction and heat-treated at a temperature of not lower than 3° C. lower than the melting point of the resin starting material having the lowest melting point.
    Type: Application
    Filed: November 29, 2005
    Publication date: August 14, 2008
    Applicant: Toyo Boseki Kabushiki Kaisha
    Inventors: Kazumoto Imai, Hideki Shimizu, Naonobu Oda
  • Publication number: 20080182117
    Abstract: A label for in-mold forming which comprises a thermoplastic resin film base layer (I), a heat-sealable resin layer (II), and an antistatic layer (III), wherein the heat-sealable resin layer (II) comprises a heat-sealable resin including a copolymer of propylene and ?-olefin having 4-20 carbon atoms and has a degree of non-crystallinity of 60-90% as determined with a differential scanning calorimeter (DSC) at temperatures less than 90° C., the antistatic layer (III) comprises an antistatic agent in an amount of 0.001 to 1 g per unit area (m2) and the surface of the layer has a wettability index (JIS-K-6768) of 32-54 mN/m, and the label has a porosity higher than 10% and not higher than 70% and has an opacity (JIS-P-8138) higher than 20% and not higher than 100%; and a labeled container with the label.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Masaki Shiina, Takatoshi Nishizawa
  • Publication number: 20080182472
    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: Application
    Filed: February 17, 2006
    Publication date: July 31, 2008
    Inventors: Shigeru Ogasawara, Hirotsugu Yoshida, Hisashi Eguchi, Ryuichi Matsuo
  • Publication number: 20080174045
    Abstract: The invention deals with an apparatus for the preparation of a film or fibre out of a reduced amount of material, in particular of polymeric material. This is achieved with small-sized equipment wherein each stretch roll has a diameter of between 35 and 100 mm. The invention also relates to a process for preparing a representative film from or fibre with a reduced amount of material, by using the specific equipment.
    Type: Application
    Filed: May 4, 2005
    Publication date: July 24, 2008
    Applicant: DSM IP ASSETS B.V.
    Inventors: Johannes I. Tiesnitsch, Matheus P. Quaedflieg, Leonardus W.G. Rijks, Laurentius J.H. Nijsten
  • Patent number: 7396498
    Abstract: The invention disclosed herein relates to a method of treating plastics material fibers, filaments or film to improve their resistance to degradation by UV radiation and/or increase their resistance to gas (oxygen) transmissivity and an improved plastics material so treated, the method including stretching the fiber, filament or film beyond its yield point and allowing the film to at least partially relax.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: July 8, 2008
    Assignee: Integrated Packaging Australia Pty. Ltd.
    Inventor: Peter Johnstone
  • Publication number: 20080124606
    Abstract: A proton exchange membrane includes a semi-permeable polyelectrolyte films that extends along an axis. The polyelectrolyte film is stretched along the axis and remains stretched when immersed in a methanol or methanol and water solutions.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 29, 2008
    Inventors: Jun Lin, Ryszard Wycisk, Peter N. Pintauro
  • Publication number: 20080118730
    Abstract: Disclosed is a biaxially oriented multilayer film comprising at least two layers A-B, wherein A and B represent separate layers at least one of which layers comprises a polyimide having a Tg of greater than about 200° C., wherein the film has a CTE of less than 35 ppm/° C., and wherein A comprises 60 wt. %-100 wt. % of amorphous polymer with 0 wt. %-40 wt. % of crystallizable polymer, and B comprises 60 wt. %-100 wt. % crystallizable polymer with 0 wt. %-40 wt. % amorphous polymer, the relative thicknesses of layer A to layer B are in a ratio in a range of between 1:5 and 1:100, and the thickness of the film is in a range of between 5 ?m and 125 ?m. Also disclosed is a biaxially oriented monolithic film comprising a polyimide with structural units formally derived from 3,4-diaminodiphenylether and 4,4-oxydiphthalic anhydride. Laminates comprising the films and methods for making film and laminate are also disclosed. Articles comprising a film or laminate of the invention are also disclosed.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 22, 2008
    Inventors: Ta-Hua Yu, James M. White, Sapna Blackburn, Irene Dris, Kapil Sheth, Kevin Durocher, Safwat Tadros