By Calendering Patents (Class 264/175)
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Patent number: 7550555Abstract: Ultrahigh molecular weight polyethylene compositions of highly beneficial sintering characteristics are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described.Type: GrantFiled: January 24, 2003Date of Patent: June 23, 2009Assignee: Smith & Nephew Orthopaedics AGInventors: Paul Smith, Jeroen Visjager, Theo Tervoort
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Publication number: 20090146337Abstract: Disclosed is a method for producing an extruded resin sheet comprising: heat-melting a thermoplastic resin and then extruding it into a sheet-form through a die; pressure-forming the extruded molten thermoplastic resin with a first roll and a second roll; and further pressure-forming the formed resin with the second roll and a third roll while wrapping the formed resin around the second roll, wherein the first roll is a roll having an outer circumferential surface of metal, the second roll is a highly rigid metal roll, and the third roll is an elastic roll having a metal thin film at its outer circumferential surface. The present invention provides a method for producing an extruded resin sheet with excellent appearance.Type: ApplicationFiled: December 4, 2008Publication date: June 11, 2009Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, ESCARBO SHEET CO., LTDInventors: Tomohiro MAEKAWA, Kazuhiko Hatakeyama
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Patent number: 7544318Abstract: A method of producing a plastic sheet-strap includes the steps of providing first and second work rollers such that the work rollers rotate in opposite directions and at different lineal surface velocities. The work rollers are spaced apart with respect to each other so as to define a work roller nip therebetween. A pinch roller is provided that is operably associated with the first work roller. The pinch roller and the first roller defining a deaerating nip therebetween. A solid sheet of material having a thickness is fed into the deaerating nip. The material is pinched against the first work roller and moves with rotation of the first work roller to the work roller nip between the first and second work rollers. The material is simultaneously milled and stretched substantially at the nip during a single pass of the solid sheet material through the nip as the rollers rotate in opposite directions and at different lineal surface velocities to form a milled and stretched oriented sheet.Type: GrantFiled: April 5, 2004Date of Patent: June 9, 2009Assignee: Illinois Tool Works Inc.Inventors: Donald L. Van Erden, James M. Kniola, Kenneth C. Rinehart, Otto G. Weber
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Patent number: 7544421Abstract: The present invention relates to a floor covering based on linoleum having improved fire-protection properties, comprising at least one wear layer made of linoleum, which contains at least one phosphorus-containing compound, solution, suspension, or dispersion as a liquid/viscous flame retardant in a quantity of up to 20 weight-percent, in relation to the quantity of the wear layer, as well as a method for the manufacture thereof. Furthermore, the present invention relates to a floor covering based on cork having improved flame protection properties, comprising at least one phosphorus-containing compound, solution, suspension, or dispersion as a liquid/viscous flame retardant in a quantity of up to 20 weight-percent, in relation to the quantity of the wear layer.Type: GrantFiled: November 29, 2002Date of Patent: June 9, 2009Assignee: Armstrong DLW AGInventors: Guido Burmeister, Hanns-Jörg Mauk, Milko Ess
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Publication number: 20090135345Abstract: Disclosed is a method for production of a film, which comprises the steps of: extruding a molted material containing a cellulose resin on a cooling roll from a die in a film-like form at a draw ratio ranging from 10 to 30 inclusive; pressing the extruded molted film on the cooling roll with a touch roll; and transferring the molted film while solidifying the film on the cooling roll, wherein the touch roll has a metal-made outer cylinder, an inner cylinder, and a space for accommodating a cooling medium between the metal-made outer cylinder and the inner cylinder and also has a touch roll linear pressure ranging from 1 to 15 kg/cm inclusive during pressing with the touch roll.Type: ApplicationFiled: December 1, 2006Publication date: May 28, 2009Inventors: Takatoshi Yajima, Takashi Murakami
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Publication number: 20090130382Abstract: According to the present invention, the film is cooled little by little by controlling the surface temperature of the cooling drums so that the surface temperature of the cooling drums downstream is lower than that of the cooling drums upstream, whereby it is prevented from slipping and shrinking on the surface of the cooling drums. Thus, defects can be prevented from occurring in the film, whereby a high-quality thermoplastic film for optical applications can be produced.Type: ApplicationFiled: May 24, 2006Publication date: May 21, 2009Applicant: FUJIFILM CORPORATIONInventors: Masaaki Otoshi, Kiyokazu Hashimoto
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Publication number: 20090123822Abstract: The present invention relates to a particular multi-layer microporous membrane having a good balance of important properties, including excellent electrochemical stability and low heat shrinkage, while maintaining high permeability and heat resistance, with good mechanical strength, compression resistance and electrolytic solution absorption. Of particular importance when used as a battery separator, the present multi-layer microporous membrane exhibits excellent heat shrinkage, melt down temperature and thermal mechanical properties, i.e. low maximum shrinkage in the molten state. The multi-layer microporous membrane of the present invention can be produced (or manufactured) by layering, such as for example by coextrusion, one or more microporous membrane second layers and one or more microporous membrane first layers, such as on one or both sides of a second layer.Type: ApplicationFiled: November 9, 2007Publication date: May 14, 2009Inventors: Kotaro Takita, Shintaro Kikuchi
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Publication number: 20090102087Abstract: A method for manufacturing a biodegradable paperboard includes the steps of: a. neutralizing the static electricity of a paperboard after the paperboard being preheating; b. smearing a biodegradable film onto the surface of the paperboard by a laminating machine; c. extruding the biodegradable film into the fiber of the paperboard to make a tight attachment by a double metal roller set with heating devices installed inside the rollers; d. forming the paperboard by the extrusion of a cooling roller set for further process for producing paper containers for food.Type: ApplicationFiled: October 10, 2008Publication date: April 23, 2009Inventor: Hsi-Ching Chang
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Publication number: 20090104431Abstract: A coated paper for printing having a bulk density of 1.05 g/cm3 or less and two or more coating layers mainly composed of white pigments and adhesives formed on at least one side of a base paper which has a bulk density of 0.75 g/cm3 or less, wherein pigments of an undercoat in contact with an outermost coating layer comprises satin white of 1-30 mass % whose average particle diameter is within a range of 0.1-1.3 ?m measured pursuant to radiolucent particle size distribution measurement and other white pigments of 70-99 mass %, wherein an amount of the adhesives of the undercoat is within a range of 10-20 mass % based on 100 mass parts of pigment components.Type: ApplicationFiled: January 25, 2005Publication date: April 23, 2009Inventors: Takayuki Kishida, Yuichi Ogawa, Kenji Yanagisawa, Hideaki Yamada, Yoshiki Kojima, Tetsuya Hirabayashi
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Publication number: 20090057941Abstract: A method for manufacturing a synthetic leatherette that possesses properties of high elasticity, abrasion resistance and environmental friendliness, comprises following steps: melting grains of Thermoplastic Elastomer (TPE) in a melting pot into a TPE melt with heat; mixing the TPE melt into an even TPE liquid; sheeting the TPE liquid into a TPE layer with a heat pressing roller; laminating the TPE layer with a reinforcement material layer with heat; cooling the TPE layer laminated with the reinforcement material layer with a cooling rooler; and reheating the cooled TPE layer laminated with the reinforcement material layer in a oven for finalize the synthetic leatherette. In industrial applications, the disclosed synthetic leatherette made of TPE is advantaged by being innocuous, without uncomfortable odor, decomposable, completely recyclable, highly elastic, highly wear-resistant, and light.Type: ApplicationFiled: August 31, 2007Publication date: March 5, 2009Inventors: Chien-Hsing Yeh, Shih-Yen Wang
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Patent number: 7497979Abstract: A melt-processable thermoplastic composition is described, which comprises a) 50-99.5 wt. % of a melt-processable thermoplastic polymer and b) 0.5-50 wt. % of a particulate polymer comprising the residues of a monomer mixture comprising 50-100 wt. % of MMA, at least 0-50% of an ethylenically unsaturated comonomer comprising at least one alkyl acrylate or methacrylate and 0-10 wt. % of a copolymerisable cross-linking monomer said particles having a maximum dimension of 5 mm. The compositions have reduced surface gloss and may be useful for forming building components or in any other application in which a low gloss surface is required. A method of making the composition and its uses, for example its use as a capstock material, are also described.Type: GrantFiled: February 1, 2005Date of Patent: March 3, 2009Assignee: Lucite International UK LimitedInventors: Paul Eustace, Nicholas John Marston, John Robert Oliver
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Publication number: 20090053959Abstract: This invention relates to a nonwoven fabric having a first component of from 5% to 99% by weight based on the total weight of the composition wherein the first component is selected from the group consisting of homopolymers of propylene and random copolymers of propylene, the first component having a heat of fusion as determined by DSC of less than 50 J/g and stereoregular propylene crystallinity; and a second component having from 95% to 1% by weight based on the total weight of the composition of a propylene polymer or blends of propylene polymers; wherein the nonwoven fabric has a permanent set of less than 60%.Type: ApplicationFiled: August 15, 2008Publication date: February 26, 2009Inventors: Sudhin Datta, Derek W. Thurman, Chia Y. Cheng, Li Wen, David R. Johnsrud
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Publication number: 20090053514Abstract: The invention concerns an offset printing blanket. The blanket is of the type comprising an outer printing layer, an inner layer whereby the blanket is in contact with a support cylinder and at least one compressible intermediate layer. The blanket is characterized in that it comprises a printing layer (10) whereof the printing surface has very slight surface roughness (Ra) advantageously less than 0.4 micrometer. The invention is useful in the field of offset printing.Type: ApplicationFiled: June 22, 2006Publication date: February 26, 2009Applicant: MACDERMID PRINTING SOLUTIONS EUROPE SASInventors: Denis Hertzog, Sophie Haraux, Marc Than, Hubert Justine, Jerzy Kuczynski
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Publication number: 20090036973Abstract: Thin PTFE layers are described having little or no node and fibril microstructure and methods of manufacturing PTFE layers are disclosed that allow for controllable permeability and porosity of the layers. In some embodiments, the PTFE layers may act as a barrier layer in an endovascular graft or other medical device.Type: ApplicationFiled: October 14, 2008Publication date: February 5, 2009Applicant: TRIVASCULAR2, INC.Inventors: Joseph W. Humphrey, Jeffrey B. Skiba
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Publication number: 20090029110Abstract: This invention refers to synthetic decorative coverings in order to cover and protect trafficable surfaces.Type: ApplicationFiled: September 20, 2007Publication date: January 29, 2009Inventor: Gabriel Lopez Montiel
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Publication number: 20090029134Abstract: The invention relates to a molding compound including a polyester resin composition, ABS components, waxes, matting agents and optionally vegetable oil, which is used to produce films with a low luster, improved thermal resistance of the film and/or of the surface structure and an increased shrinking onset temperature, in addition to a modified shrinkage progression in comparison to films without the aforementioned additives. The fraction of the polyester resin composition is between 30 and 97 wt. % and the fraction of the additives between 1.5 and 70 wt. %, in relation to the total weight of the molding compound. The films are used as shrink-wrapping and packaging films and films for furniture and printed circuit boards.Type: ApplicationFiled: January 27, 2006Publication date: January 29, 2009Inventors: Thorsten Grigo, Max Niegl, Guenter Deiringer
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Publication number: 20090004942Abstract: The present invention relates to a method for manufacturing nonwoven and nonwoven obtainable by said method. Particularly, the invention relates to a nonwoven provided with improved tactile and absorbent characteristics, which make it suitable for use in the field of surface cleaning, personal hygiene, or formation of garments.Type: ApplicationFiled: July 29, 2004Publication date: January 1, 2009Inventor: Roberto Pedoja
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Publication number: 20080318016Abstract: A non-fibrous ultra high molecular weight polyethylene tape having a width of 1-inch or greater and a modulus of 1,400 grams per denier or greater. The non-fibrous UHMWPE tape is obtained by compression molding ultrahigh molecular weight polyethylene powder at a temperature below its melting point and then drawing and stretching the entire resultant compression molded UHMWPE sheet, with no slitting or splitting of the sheet, at a draw ratio of at least 100:1. The UHMWPE tape can be produced in weights of 6,000 to 90,000 denier or greater. The UHMWPE tape of the present invention minimizes the effect of stress concentrators that are prevalent with fibers and thereby enables the tape to be drawn at much higher draw ratios than is possible with fibrous UHMWPE. When used in ballistics panels, the high modulus high molecular weight polyethylene tape of the present invention improves ballistic performance by providing enhanced dissipation of the impact energy of a projectile.Type: ApplicationFiled: June 25, 2007Publication date: December 25, 2008Inventors: Gene C. Weedon, Kenneth C. Harding, Lisa Owen
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Publication number: 20080292944Abstract: The invention relates to a method for the production of a gas diffusion electrode from a silver catalyst on a PTFE-substrate. The pore system of the silver catalyst is filled with a moistening filling agent. A dimensionally stable solid body having a particle size greater than the particle size of the silver catalyst is mixed with the silver catalyst. Said compression-stable mass is formed in a first calendar in order to form a homogenous catalyst band. In a second calendar, an electroconductive discharge material is embossed in the catalyst band, and heating takes places between the first and the second calendar by means of a heating device, wherein at least parts of the moistened filling agent are eliminated. The invention also relates to a gas diffusion electrode which is produced according to said method.Type: ApplicationFiled: July 9, 2005Publication date: November 27, 2008Applicants: UHDE GMBH, GASKATEL GESELLSCHAFT FÜR GASSYSTEME DURCH KATALYSInventors: Roland Beckmann, Karl-Heinz Dulle, Peter Woltering, Randolf Kiefer, Frank Funck, Wolfram Stolp, Hans-Joachim Kohnke, Joachim Helmke
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Publication number: 20080271840Abstract: A floor covering comprising polyvinyl butyral is provided.Type: ApplicationFiled: April 1, 2008Publication date: November 6, 2008Inventors: Brian S. Randall, Paul D. Evans, Wallace J. Hammel
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Publication number: 20080268194Abstract: A thermal bonding pattern for nonwoven fabric possessing improved abrasion resistance while retaining softness, comprising a basket-weave pattern or other pattern having a transition area (2) equal to at least 10% of bonding spot area (1) in FIG. 1, more preferably a transition area (2) equal to at least 50% of bonding spot area (1), and most preferably a transition area (2) equal to at least 100% of bonding spot area.Type: ApplicationFiled: April 24, 2007Publication date: October 30, 2008Inventors: Kyuk Hyun Kim, Valeria G. Erdos, Smita Bais-Singh
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Publication number: 20080258333Abstract: The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the rollerType: ApplicationFiled: November 16, 2006Publication date: October 23, 2008Inventors: Amit Kumar Lohia, Harendra Kumar Anand
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Publication number: 20080258332Abstract: A manufacturing apparatus and a manufacturing method that can form in successive processes tooth-marks longitudinally at a regular pitch on the back side of a passenger-conveyor moving handrail. The manufacturing apparatus includes: a material feed port through which a thermoplastic resin is fed; a heater that heats the fed thermoplastic resin; a molding machine that extrusion-molds the thermoplastic resin having been fluidized; and a tooth-mark forming tool, which is a tooth-mark forming device, that forms tooth-marks longitudinally at a regular pitch on the back side of a preformed moving-handrail material having been extrusion-molded, while it is in a state in a plastically deformable temperature range.Type: ApplicationFiled: January 19, 2005Publication date: October 23, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yutaka Hashioka, Jiro Matsuyama, Takahiko Nagaoka, Atsushi Kawasaki, Joichi Nakamura
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Patent number: 7438841Abstract: A polyester resin composition is calendered to produce a film or a sheet. The polyester resin composition is a polyester having a crystallization half time from a molten state of at least 5 minutes combined with an additive for preventing sticking of the polyester to calendering rolls.Type: GrantFiled: August 23, 2007Date of Patent: October 21, 2008Assignee: Eastman Chemical CompanyInventors: Paul Mary Flynn, Richard Leon McConnell, Hubertus Jacobus Wilhelmus Moolenaar, Timothy Michael Sanders
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Publication number: 20080254260Abstract: A wide sheet of highly oriented ultra high molecular weight polyethylene comprising a plurality of strips of highly oriented ultra high molecular weight polyethylene partially overlapped or abutted longitudinally to define joints between adjoining strips wherein the thickness of the joint is less than about 80% of the thickness of the sum of the thicknesses of the adjoining strips that make up the joint. A continuous method for the production of such materials comprising subjecting longitudinally overlapping or abutted strips of these materials to temperatures below the melting point of the UHMWPE and pressures over 300 pli is also disclosed.Type: ApplicationFiled: April 13, 2007Publication date: October 16, 2008Inventors: Kenneth C. Harding, Gene C. Weedon, Lisa Owen
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Patent number: 7431579Abstract: A method and apparatus for a calendering system is provided to allow for fine gauge adjustment of the product. The calender system has a first and second roller each having a first and second end mounted in opposed end supports. The end supports each have an inlet and an outlet in fluid communication with one or more internal passages, wherein a heat transfer medium may be circulated through the one or more internal passages. The heat transfer medium may either heat or cool the internal passages of the end supports, resulting in the respective increase or decrease in the gauge of the product.Type: GrantFiled: August 24, 2004Date of Patent: October 7, 2008Assignee: The Goodyear Tire & Rubber CompanyInventor: Daniel Ray Downing
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Publication number: 20080237918Abstract: For producing a creped material, especially a sealing material for connections and transitions on buildings, with this material being provided with crepe folds, wherein the crepe folds run in different directions, a method is disclosed with the steps of: a) preparing a deformable material web (9) with a main expansion direction (90); b1) forming a longitudinal profile (91) in at least one region of the deformable material web (9), wherein the longitudinal profile runs essentially parallel to the main expansion direction (90); c) forming a transverse profile (94) in at least one region of the deformable material web (9), wherein the transverse profile (94) runs at an angle other than 180° relative to the main expansion direction (90); and d) pressing at least one section of the deformable material web (9) that has at least one region with a longitudinal profile (91) and a transverse profile (94), so that the material web (9) is provided with the crepe folds.Type: ApplicationFiled: January 15, 2008Publication date: October 2, 2008Inventor: Bernd Meinecke
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Publication number: 20080233310Abstract: In an aspect of the present invention, since the maximum linear pressure when a sheet-like melted resin is nipped between an elastic roller and a cooling roller is controlled at 0.3 MPa to 3 MPa, the development of retardation in film forming can be prevented. According to the aspect, since an elastic roller and a cooling roller are rotated at nearly the same speed with the periphery speed ratio thereof at 0.99 to 1.01, a sheet-like melted resin can be transported without applying a stress caused by a rotation difference between the rollers, whereby the development of retardation on the unstretched thermoplastic resin film can be prevented. Further, since the surface temperature of a cooling roller is controlled so as to be 0.01° C. to 30° C. higher than that of an elastic roller, a sheet-like melted resin is pulled toward the elastic roller side, whereby the development of retardation can be prevented.Type: ApplicationFiled: March 22, 2008Publication date: September 25, 2008Applicant: FUJIFILM CORPORATIONInventor: Akihide FUJITA
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Publication number: 20080203366Abstract: A halogen-free electrically insulating film is prepared from a composition including particular amounts of a poly(arylene ether), a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene, and a triaryl phosphate. The electrically insulating film may be prepared by an extrusion and/or calendering method. Uses of the electrically insulating film include, for example, shielding applications in power supply housing, printed circuit board insulation, backlit aircraft in flight panels and displays, business equipment insulation, computer rack partitions, and television and monitor insulation.Type: ApplicationFiled: February 23, 2007Publication date: August 28, 2008Inventors: Sapna Blackburn, Scott Michael Fisher, Kwan Hongladarom, Robert John Hossan
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Publication number: 20080206535Abstract: The invention relates to a molding mass made from vinyl chloride polymer or polyvinylchloride at 5 to 94 wt. % and a K value of 50 to 90 additives at 2 to 25 wt. % and a polymer, whereby the weight percentages relate to the total weight of the molding mass. The polymer is a semi-crystalline or amorphous polyester. The film is produced from the molding mass by plastifying and fusing the same and calendering or extruding the same to give a film with a thickness of 100 microns to 1 mm. By means of subsequent in-line or off-line method steps, the film, for example, by means of drawing with a drawing degree of 1.3 to 7, can be further processed to give a thin high-shrinkage film.Type: ApplicationFiled: June 21, 2005Publication date: August 28, 2008Inventors: Thorsten Grigo, Roland Schrauf, Werner Kurmayer
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Publication number: 20080143012Abstract: Polymer film having at least two regions of differing translucency. The at least two regions of differing translucency can be obtained by selectively compressing regions of the polymer film. Laminate comprising textile material and such a polymer film. The laminates can be breathable and/or waterproof. Suitable uses for the laminate include, for example, garments, tents, and sleeping bags.Type: ApplicationFiled: February 29, 2008Publication date: June 19, 2008Inventors: Jean Norvell, Craig D. Lack
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Publication number: 20080121324Abstract: Tire tread comprising a rubber composition based on at least a diene elastomer, a nonblack reinforcing filler, in particular inorganic filler, and a coupling agent providing the bonding between the diene elastomer and said filler, said composition being characterized in that it additionally comprises a prophoto-oxidizing agent and optionally carbon black at a level of less than 5 phr (parts by weight per hundred parts of elastomer). The prophoto-oxidizing agent is in particular a photo-initiator of radical or cationic type, which may or may not be activated by the presence of a photosensitizer. The tires comprising such a tread exhibit, after photo-oxidation (exposure to UV-visible radiation) of said tread, a significant increase in the grip on a wet road.Type: ApplicationFiled: January 16, 2006Publication date: May 29, 2008Inventors: Stephanie Cambon, Didier Vasseur
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Publication number: 20080085405Abstract: Adhesive tape having a carrier which is composed of one or more carrier films, at least one side of the carrier bearing an adhesive applied at least partially, characterized in that at least one of the carrier films comprises at least one homopolymer, copolymer or terpolymer of propylene and in that there are carbon nanotubes (CNTs) in at least one of the carrier films.Type: ApplicationFiled: November 21, 2006Publication date: April 10, 2008Applicant: tesa AktiengesellschaftInventors: Alexander Prenzel, Bernd Luhmann, Bernhard Mussig
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Patent number: 7320767Abstract: A dimensionally more stable mat is made from a less dimensionally stable mat by saturating the mat with a binder and passing and compressing the mat between a pair of squeeze rolls to remove binder from the mat. At least one of the rolls has a series of annular grooves therein spaced apart along the length of the roll and across the width of the mat whereby as the mat is passed between the rolls a first and a second series of longitudinally extending bands are formed in the mat having different average binder concentrations. The second series of bands, formed in the mat at the annular grooves of the roll, has an average binder concentration greater than that of the first series of bands.Type: GrantFiled: January 10, 2005Date of Patent: January 22, 2008Assignee: Johns ManvilleInventors: Barry Nelson Edge, David Hershel Pullen
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Publication number: 20080012272Abstract: A gas bag module (10) for a vehicle occupant restraint system comprises a housing with a gas generator support (17) and a covering (26). The housing consists at least partly of a thermoplastic elastomer. The thermoplastic elastomer is foamed using a physical or chemical foaming agent.Type: ApplicationFiled: July 11, 2007Publication date: January 17, 2008Inventors: Achim Haertel, Klaus Bernhard, Bernd Issler, Uli Vielhuber, Winfried Grauer
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Patent number: 7297300Abstract: A method of making a polarizable electrode for an electric double layer capacitor, includes adding a binder assistant to a binder so that the binder is swollen and mixing a carbonaceous powder, a conductive assistant and thereafter the swollen binder, thereby obtaining a material mixture, kneading the material mixture into a primary forming material, forming the primary forming material into a secondary forming material, and rolling the secondary forming material into a sheet shape.Type: GrantFiled: December 1, 2003Date of Patent: November 20, 2007Assignees: Daido Metal Company Ltd., Honda Motors Co. Ltd.Inventors: Kouki Ozaki, Masanori Tsutsui, Manabu Iwaida, Shigeki Oyama, Kenichi Murakami
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Publication number: 20070264448Abstract: The present invention provides a method of manufacturing a thermoplastic resin film comprising the steps of: extruding a molten thermoplastic resin from a die in a form of sheet; cooling and solidifying the thermoplastic resin sheet by sandwiching the sheet between a pressurizing/cooling roller and a press roller; and further cooling and solidifying the thermoplastic resin sheet while transferring the thermoplastic resin sheet by a plurality of cooling rollers, wherein the temperature of each of the cooling rollers is set at within a range of ±3° C. relative to sheet temperature of the thermoplastic resin sheet in contact with the cooling roller; at the same time, the sheet temperature of the thermoplastic resin sheet when removed from the cooling roller arranged most downstream of the cooling rollers is set to be equal to or less than a glass transition temperature Tg(° C.) of the thermoplastic resin ?15° C.Type: ApplicationFiled: May 2, 2007Publication date: November 15, 2007Applicant: FUJIFILM CorporationInventor: Akihide Fujita
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Patent number: 7279123Abstract: A polyester resin composition is calendered to produce a film or a sheet. The polyester resin composition is a polyester having a crystallization half time from a molten state of at least 5 minutes combined with an additive for preventing sticking of the polyester to calendering rolls.Type: GrantFiled: December 1, 2004Date of Patent: October 9, 2007Assignee: Eastman Chemical CompanyInventors: Paul Mary Flynn, Richard Leon McConnell, Hubertus Jacobus Wilhelmus Moolenaar, Timothy Michael Sanders
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Patent number: 7252797Abstract: The present invention is directed to calendaring an electrode active admixture, such as of a transition metal oxide, and particularly silver vanadium oxide, into an electrode structure. To obtain electrode structures of a desired low basis weight requires calendaring a paste of the active material into a first sheet tape, which is subsequently subjected to secondary and ternary calendering steps. Secondary calendaring is performed in a direction reverse or orthogonal to that used to form the initial sheet tape. The final calendaring step is performed in a third direction aligned 180° with respect to the first direction, but with the second structure rotated bottom over top with respect to the orientation that formed the first and second structures. The ternary calendaring step provides for fibrillation of the fluoro-polymeric binder in a direction reverse to the initial direction to form the product low basis weight electrode active structure.Type: GrantFiled: September 22, 2003Date of Patent: August 7, 2007Assignee: Greatbatch Ltd.Inventors: Brian D. Panzer, William C. Thiebolt, III
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Patent number: 7232613Abstract: The base material for pressure-sensitive adhesive tape or sheet is constituted of a polyolefin based resin as the major component and is obtained by rolling by means of a calender having a measure capable of individually changing the rotational speed of each calender roll. Examples of the measure capable of individually changing the rotational speed of each calender roll include a measure provided with motors capable of individually driving their respective calender rolls and a measure provided with speed regulators capable of individually regulating their respective calender rolls. It may be employed that the number of calender rolls is four and that the roll arrangement is in the reverse L shape. It is preferable that the base material for pressure-sensitive adhesive tape or sheet contains an inorganic compound together with the polyolefin based resin.Type: GrantFiled: June 23, 2004Date of Patent: June 19, 2007Assignee: Nitto Denko CorporationInventors: Yoshio Nakagawa, Masato Shirai, Shuzo Fujiwara, Yoshihide Kawaguchi, Hiroichi Ukei
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Patent number: 7226558Abstract: A high density microwall ePTFE structure and a method for making, involving the manipulation of a standard extruded ePTFE graft. The final product has the desired characteristics of high density, reduced wall-thickness, above-average radial strength and enhanced suture retention.Type: GrantFiled: February 5, 2004Date of Patent: June 5, 2007Assignee: Bard Peripheral Vascular, Inc.Inventors: Tim Nieman, Randy Earl Saylor, Robert Hunkins, Robert Calcote
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Patent number: 7189298Abstract: Method for providing precured innerliners (50) having a predetermined cross sectional profile for use as part of a pneumatic tire assembly used in a bladder-less shaping and vulcanizing mold. The innerliner (50) is formed from a continuous strip of elastomeric material (12) hot formed using a calender assembly (10) with a profiled calender roller (16). The formed strip is cured “in-line” in a press (38) having a profile matching platen (80) before being wound onto a tire building drum (48). After the pneumatic tire assembly is completed, the assembly is shaped and cured in a bladder-less mold, utilizing the precured innerliner as the impervious inner layer. Initially, the center region (62) of the innerliner is at least twice as thick as the lateral regions (72, 74). In the finished pneumatic tire, the innerliner exhibits a uniform thickness.Type: GrantFiled: November 25, 1998Date of Patent: March 13, 2007Assignee: The Goodyear Tire & Rubber CompanyInventors: Albert James Yovichin, Daniel Ray Downing, James Alfred Benzing, II
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Patent number: 7060210Abstract: This invention involves forward integration of the art paste extrusion process by adding a step to the processing sequence to change the uniaxially-oriented art form to a desirable planar biaxially-oriented form. This invention also involves the backward integration of the resin preparation to reduce the commercial coagulated dispersion resin particle size (average 500 micron) to the size range of colloidal size particles contained within the original 500 micron particle. In this small particulate form, the polytetrafluoroethylene (PTFE) resin can be blended more homogeneously and extruded with less turbulence in the plug extrusion process, the rheological mechanism of this extrusion process. The size reduction makes processing of micron size fillers possible in up to 90 percent volume of the PTFE resin. This invention also provides a direct and simple method of producing planar biaxially-oriented sheet and a source of resin formulations for fabricating other forms and shapes.Type: GrantFiled: March 26, 2004Date of Patent: June 13, 2006Inventor: Robert Roberts
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Patent number: 7030181Abstract: A film or sheet having a glass transition temperature below about 23° C. and a melting temperature greater than about 120° C. is prepared by first preparing a polyester composition of about 50 to about 95 weight percent of a base copolyester having a melting temperature of less than about 220° C. and exhibiting more than about 1 percent crystallinity after annealing for 2000 minutes at a temperature of which the base copolyester has a maximum crystallization rate; and about 5 to about 50 weight percent of a plasticizer suitable for use with the base copolyester. The polyester composition is formed into a film or sheet. During formation of the film or sheet or afterwards, crystallization is induced to provide a soft and flexible film or sheet.Type: GrantFiled: February 28, 2002Date of Patent: April 18, 2006Assignee: Eastman Chemical CompanyInventors: Eric Jon Moskala, Kevin Douglas Horton, Rodney Layne Piner, John Walker Gilmer
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Patent number: 6984276Abstract: This invention relates to a method for preparing nonwoven fabrics having an improved balance of properties in the machine and cross-directions. More specifically, the invention utilizes nonwoven webs that include relatively low levels of multiple-component fibers having latent three-dimensional spiral crimp combined with fibers that do not develop spiral crimp. The latent spiral crimp of the multiple-component fibers is activated, such as by heating, under free shrinkage conditions, after formation of the nonwoven web to achieve re-orientation of the non-spirally-crimpable fibers and an improved balance of properties such as tensile strength and modulus.Type: GrantFiled: December 16, 2002Date of Patent: January 10, 2006Assignee: Invista North America S.arl.Inventors: Dimitri P. Zafiroglu, Geoffrey David Hietpas
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Patent number: 6949296Abstract: The substrates of the present invention comprise a polyimide base polymer derived at least in part from non-rigid rod monomers together with optionally rigid rod monomers where the substrates are cured under low tension. The resulting polyimide materials have been found to provide advantageous properties (e.g. balanced molecular orientation, good dimensional stability, and flatness) particularly useful for electronics type applications.Type: GrantFiled: April 4, 2003Date of Patent: September 27, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Meredith L. Dunbar, James R. Edman
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Patent number: 6916583Abstract: A method for printing an image on a surface of a substrate having a surface finish defined by a gloss, the method comprising: printing an image on the surface of the substrate, such that image areas thereof have a thickness, when fixed to the substrate and dry, of less than about 6 micrometers of a thermoplastic material; and smoothing the surface of at least a portion of the thermoplastic material.Type: GrantFiled: February 6, 2000Date of Patent: July 12, 2005Assignee: Hewlett-Packard Indigo N.V.Inventors: Benzion Landa, Ishaiau Lior, Itzhak Ashkenazi, Avner Schneider
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Patent number: 6908685Abstract: The invention provides a polyimide film manufactured from a polyamic acid prepared from pyromellitic dianhydride in combination with 10 to 60 mol % of phenylenediamine and 40 to 90 mol % of 3,4?-oxydianiline, based on the overall diamine. The polyimide film, when used as a metal interconnect board substrate in flexible circuits, chip scale packages (CSP), ball grid arrays (BGA) or tape-automated bonding (TAB) tape by providing metal interconnects on the surface thereof, achieves a good balance between a high elastic modulus, a low thermal expansion coefficient, alkali etchability and film formability.Type: GrantFiled: August 23, 2001Date of Patent: June 21, 2005Assignees: E. I. du Pont de Nemours and Company, DuPont-Toray Co. Ltd.Inventors: Kenji Uhara, Kouichi Sawasaki, Naofumi Yasuda, Brian C. Auman, John D. Summers
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Patent number: 6902691Abstract: Process for operating a calender having a roll stack formed by a plurality of rolls resting against one another in a press direction along a stack plane, at least one of the rolls including an elastic surface. The process includes determining whether a barring pattern has occurred on at least one of the rolls, determining a wavelength of the barring pattern, and displacing at least one of the rolls based upon the wavelength.Type: GrantFiled: July 11, 2002Date of Patent: June 7, 2005Assignee: Voith Paper Patent GmbHInventors: Rolf van Haag, Eva Scheidler, Robert Wolf
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Patent number: 6893597Abstract: This method permits manufacturing EPDM rocket motor insulation in which carbon fibers are dispersed and immobilized in the EPDM polymeric matrix but are not excessively fractured or fragmentized, i.e., broken into smaller fragments, when encountering degrees of shear necessary to homogeneously or otherwise distribute or disperse the carbon fibers in the EPDM polymeric matrix. The method is substantially solvent free and is performed via distributive/reduced shear mixing to distribute the fragile carbon fibers into a rubber matrix without excessive damage. According to one embodiment, at least about 50% of the elastomer composition introduced into the mixing apparatus is liquid EPDM terpolymer having sufficiently low molecular weight and high diene content to permit dispersion of the carbon fibers in the EPDM without substantial fragmentation of the fibers.Type: GrantFiled: December 21, 2000Date of Patent: May 17, 2005Assignee: Alliant Techsystems Inc.Inventor: David G. Guillot