By Gas Forming Or Expanding Patents (Class 264/51)
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Publication number: 20090309250Abstract: Disclosed herein are methods and pressure vessels for solid-state microcellular processing of thermoplastic rolls and sheets. In one embodiment, the present invention is directed to a method for making a gas impregnated interleaved roll, which method comprises: providing a pressure vessel having an internal pressure chamber and a rotatable shaft horizontally positioned within the pressure chamber; placing an interleaved roll about the rotatable shaft and within the pressure chamber, wherein the interleaved roll is made from a thermoplastic material sheet interleaved together with a gas-channeling material sheet; pressurizing the pressure chamber to a selected pressure; rotating the rotatable shaft having the interleaved roll thereabouts (thereby rotating the interleaved roll) while under pressure for a selected period of time; and depressurizing the internal chamber to yield the gas impregnated interleaved roll.Type: ApplicationFiled: June 15, 2009Publication date: December 17, 2009Inventors: Krishna Nadella, Steven Powers, Thomas Malone
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Publication number: 20090283613Abstract: An elastic membrane is provided for use in a flow-control device comprising a housing with a seat of a predetermined shape and dimensions for the membrane such that when the membrane is mounted in the seat, the membrane is deflected by a pressure differential between its two opposite sides. The elastic membrane has a predetermined shape and dimensions matching the seat and is made of foamed elastomer with closed cells of predetermined cell density and morphology.Type: ApplicationFiled: August 9, 2006Publication date: November 19, 2009Inventor: Tzvi Barkai
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Publication number: 20090286895Abstract: Closed cell silicone foams are formed by subjecting a silicone base to an inert gas at an elevated pressure, preferably after a pre-curing step, reducing the pressure to allow the base to expand to produce closed cell silicone foam and curing this expanded foam at an elevated temperature.Type: ApplicationFiled: January 18, 2006Publication date: November 19, 2009Inventors: Paul Jacobs, Neji Gemmell, Neil Witten
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Publication number: 20090274890Abstract: A styrene-modified polypropylene type resin particle of the present invention includes: a polypropylene type resin and a polystyrene type resin, wherein the polystyrene type resin is included at 30 parts by weight or more but less than 600 parts by weight per 100 parts by weight of the polypropylene type resin, and polystyrene type resin particles having a longitudinal diameter of 5 ?m or less are dispersed in the polypropylene type resin.Type: ApplicationFiled: February 21, 2007Publication date: November 5, 2009Applicant: SEKISUI PLASTICS CO., LTD.Inventors: Shinji Ishida, Masahiko Ozawa
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Publication number: 20090269672Abstract: A microporous polyethylene membrane having well-balanced permeability, mechanical properties, heat shrinkage resistance, compression resistance, electrolytic solution absorbability, shutdown properties and meltdown properties, with an average pore diameter changing in a thickness direction is produced by melt-blending a polyethylene resin and a membrane-forming solvent to prepare a solution A having a resin concentration of 25 to 50% by mass and a solution B having a resin concentration of 10 to 30% by mass, the resin concentration in the solution A being higher than that in the solution B, (a) simultaneously extruding the resin solutions A and B through a die, cooling the resultant extrudate to provide a gel-like sheet in which the resin solutions A and B are laminated, and removing the membrane-forming solvent from the gel-like sheet, or (b) extruding the resin solutions A and B through separate dies, removing the membrane-forming solvent from the resultant gel-like sheets A and B to form microporous polyetType: ApplicationFiled: September 27, 2006Publication date: October 29, 2009Applicant: Tonen Chemical CorporationInventors: Kotaro Takita, Shintaro Kikuchi, Kotaro Kimishima
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Patent number: 7604761Abstract: Process for continuous manufacture of latex foam rest articles such as mattresses, cushions and the like comprising a part able to participate to the manufacture steps and to remain embedded in the article with consequent improvements of final performances. A flexible perforated band, preferably a flat polymeric material net with longitudinal and cross reinforcement members, is placed over a foam laying surface provided with protuberances and in continuous advancement between a foam laying station and an unlimited length article extraction station. The latex foam passes through net holes forming an upper portion and a lower portion relative to said net. The net continuously opposes contraction forces and weight force exerted from upper portion on lower portion. The unlimited length article is subjected to successive cross cuts originating rest articles wherein a foam embedded net is arranged on ends of recesses originated by the protuberances.Type: GrantFiled: September 1, 2006Date of Patent: October 20, 2009Assignee: Sapsa Bedding SRLInventors: Luciano Abrigo, Renzo Villa
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Patent number: 7588704Abstract: The invention involves the real-time, NIR-spectroscopic, closed-loop control of the blowing agent content of polymer beads used to make lost foam casting patterns.Type: GrantFiled: July 26, 2005Date of Patent: September 15, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Scott W. Biederman, Timothy S. Rider
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Patent number: 7585439Abstract: A solid state foaming process permits the use of up to 100% recycled pre- and post-consumer polymer for the manufacture of foamed polymer material and thermoformed foamed polymer articles. The process enables the optional formation of integral unfoamed skins of controllable depth and crystallinity on foamed polymeric materials suitable for a wide variety of applications. Because this process does not alter the underlying chemistry of the material all scrap from the manufacturing process may be reused without additive to form new foamed polymeric materials and articles.Type: GrantFiled: May 14, 2004Date of Patent: September 8, 2009Assignee: Micro Green Polymers, Inc.Inventors: Gregory L. Branch, Trevor Wardle
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Patent number: 7556756Abstract: The present invention provides a method for producing a polyurethane foam molded article from a polyisocyanate compound, a polyol mixture containing polyol, a catalyst and a crosslinking agent, and a blowing agent, said method comprising continuously injecting the polyisocyanate compound, the polyol mixture and the blowing agent into a mold, using a molding machine capable of separately supplying the polyisocyanate compound, the polyol mixture and the blowing agent, while the timing of starting to inject the blowing agent is delayed after the start of injecting the polyisocyanate compound and the polyol mixture. The inventive method produces, in a single stage, a polyurethane foam molded article having the skin or high density portion selectively formed on portions of the molded article actually requiring them, where the proportions of the skin and the high density portion and the foamed core can be varied freely.Type: GrantFiled: December 14, 2005Date of Patent: July 7, 2009Assignee: Bayer MaterialScience AGInventors: Masafumi Nakamura, Hiroshi Ikuta, Masaru Suzuki, Hitoshi Maeda
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Publication number: 20090152754Abstract: A thermoplastic elastomer composition for foam injection molding is provided that includes component (A), component (B), component (C), and component (D) below, relative to 100 parts by weight of component (A), component (B) having a content of 5 to 150 parts by weight, component (C) having a content of 5 to 300 parts by weight, and component (D) having a content of 5 to 150 parts by weight. (A): A hydrogenated product of a block copolymer comprising a block composed of an aromatic vinyl compound-based monomer unit and a block composed of a conjugated diene compound-based monomer unit, the hydrogenated product having a weight-average molecular weight of not more than 200,000, (B): a propylene resin, (C): a mineral oil, and (D): an ethylene-propylene copolymer rubber having a Mooney viscosity (ML1+4, 100° C.) of 20 to 200, an ethylene-based monomer unit having a content of 40 to 80 wt % (relative to 100 wt % of the copolymer rubber).Type: ApplicationFiled: December 4, 2008Publication date: June 18, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kazuyoshi FUSE, Yuya YAMAMOTO
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Publication number: 20090148698Abstract: It is an object of the present invention to provide: a foaming mold having a high expansion ratio and a light weight and having an excellent appearance with no surface roughness; and a method for producing a foaming mold, whereby even in the case of using thermally expandable microcapsules for injection molding, the thermally expandable microcapsules can expand uniformly to give a foaming mold having a high expansion ratio and an excellent appearance. The invention is a foaming mold having uniform and closed cells, which has a cell diameter of 60 to 120 ?m, a specific gravity of 0.6 g/ml or less, and a surface roughness of 4 ?m or less.Type: ApplicationFiled: December 25, 2006Publication date: June 11, 2009Inventors: Yasuhiro Kawaguchi, Takashi Sawa
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Publication number: 20090140447Abstract: To provide an expansion injection molding process, which is freed from the occurrence of swirl marks on the surface of a molded article and by which foamed injection moldings having good appearance can be produced in a short molding cycle and at a low cost; and a mold for expansion injection molding. A movable mold 2 is moved toward a fixed mold 1, whereby a sealing member 6 set on at least one of a pair of facing surfaces of the mold 1 and mold 2 in the outside of a cavity is brought into contact with the other of the facing surfaces or a sealing member 6 set thereon to make the cavity 3 gas-sealed state. While keeping the gas-sealed state, the movable mold 2 is further moved toward the fixed mold 1 with the sealing member 6 compressed, whereby the volume of the cavity 3 is decreased to enhance the pressure in the cavity 3 to a level exceeding the atmospheric pressure. Then, a thermoplastic resin is injected into the cavity 3 of an enhanced pressure.Type: ApplicationFiled: November 8, 2005Publication date: June 4, 2009Applicant: PRIME POLYMER CO., LTDInventors: Tatsuji Kawamura, Akinori Nagano
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Patent number: 7540985Abstract: A method of producing a polyurethane molded article is provided, in which one molding machine which can provide distinctly polyisocyanate component(s) and two kinds of polyol components is used, and prior to completion of the feed of a first polyurethane mixture liquid containing a polyisocyanate and a polyol component without a blowing agent into a mold, a second polyurethane mixture liquid containing a polyisocyanate and a second polyol component with a blowing agent is fed into the mold. The method produces, in a single stage, a polyurethane foam molded article having the skin or high density portion selectively formed on portions of the molded article actually requiring them, where the proportions of the skin and the high density portion and the foamed core can be varied freely.Type: GrantFiled: December 14, 2005Date of Patent: June 2, 2009Assignee: Bayer MaterialScience AGInventors: Masafumi Nakamura, Masaru Suzuki, Hitoshi Maeda
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Patent number: 7531116Abstract: A process of producing a foamed molding, wherein expanded, substantially non-crosslinked polypropylene-based resin beads are heated in a mold to fuse-bond the beads together into a unitary body. Each of the expanded beads has been surface-modified with an organic peroxide.Type: GrantFiled: October 31, 2002Date of Patent: May 12, 2009Assignee: JSP CorporationInventors: Hidehiro Sasaki, Akinobu Hira, Keiichi Hashimoto, Hisao Tokoro, Mitsuru Shinohara, Tomoo Tokiwa
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Publication number: 20090110905Abstract: A system and method for expanding a thermoplastic material includes extruding a melted thermoplastic material through an extruder, continuously introducing a solid carbon dioxide material under pressure into the melted thermoplastic material in the extruder, foaming the melted thermoplastic material by changing the solid carbon dioxide material to gaseous carbon dioxide and allowing the gaseous carbon dioxide to mechanically mix with and foam the melted thermoplastic material, and collecting the foamed, extruded thermoplastic material. A foamed, extruded thermoplastic material is produced by the method and system.Type: ApplicationFiled: October 16, 2008Publication date: April 30, 2009Inventor: Yuri Starostenko
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Patent number: 7511082Abstract: The invention provides a polyurethane foam manufactured from a polyisocyanate and a polycarbonate polyol. Moreover, the invention provides a method of manufacturing the polyurethane foam manufactured from a polyisocyanate and a polycarbonate polyol, comprising mixing the polyisocyanate and polycarbonate polyol together and foaming same.Type: GrantFiled: August 6, 2004Date of Patent: March 31, 2009Assignee: Yukigaya Chemical Industry Co., Ltd.Inventors: Keisuke Nakamura, Masaaki Takagi
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Publication number: 20090082484Abstract: A process for producing an extruded foam of a poly(3-hydroxyalkanoate) (P3HA) yielded from a microorganism. The foam has a high expansion ratio and a high open cell rate and is excellent in environmental compatibility and biodegradability. The process for producing an extruded P3HA resin foam comprises melt-kneading a P3HA together with a volatile foaming agent to produce a mixture and extruding the mixture through a molding die into a low-pressure region, and is characterized in that the resin temperature To at the time when the mixture of a P3HA and a volatile foaming agent is extruded from the extruder (resin temperature measured at the extruder ejection opening with a thermocouple) is in the range shown by the following relationship. Tc?20?To (° C.)?Tc+20 (Tc=(Tg+Tm)/2, wherein Tg represents the glass transition temperature of the P3HA and Tm represents the melting point of the P3HA.Type: ApplicationFiled: March 15, 2006Publication date: March 26, 2009Applicant: Kaneka CorporationInventors: Fuminobu Hirose, Kenichi Senda, Toshio Miyagawa
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Publication number: 20090065136Abstract: Methods for reducing the density of thermoplastic materials and the articles made therefrom having similar or improved mechanical properties to the solid or noncellular material. Also disclosed are improvements to foaming methods and the cellular structures of the foams made therefrom, and methods for altering the impact strength of solid or noncellular thermoplastic materials and the shaping of the materials into useful articles.Type: ApplicationFiled: March 12, 2008Publication date: March 12, 2009Applicant: WASHINGTON, UNIVERSITY OFInventors: Krishna V. Nadella, Dustin Miller, Vipin Kumar, William F. Kuykendall, Stephen Probert
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Publication number: 20090026198Abstract: This invention provides a plastic container characterized in that an expanded layer comprising expanded cells having a flat shape with an average major axis of not more than 400 ?m and an average aspect ratio (L/t) of not less than 6 as viewed in cross section of the container wall along the maximum stretch direction, which are oriented in the stretch direction and are distributed so as to be superimposed on top of each other in the thickness-wise direction, is formed within the container wall. In this container, expanded cells having a flat shape are distributed so as to orient in a given direction and, thus, has light shielding properties and has a pearl-like appearance, that is, has a very high commercial value. Further, since any colorant is not contained, the suitability for recycling is excellent.Type: ApplicationFiled: July 7, 2006Publication date: January 29, 2009Applicant: Toyo Seikan Kaisha, Ltd.Inventors: Kentarou Ichikawa, Nobuhisa Koiso
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Publication number: 20090025616Abstract: Air cargo pallets having polycarbonate and other polymer and synthetic cores are disclosed herein. An air cargo pallet configured in accordance with an embodiment includes a structural panel having a cargo support surface extending between opposing edge portions. The structural panel can include a polymeric core sandwiched between first and second facesheets. In one embodiment, the polymeric core can include a first piece of polymeric material attached to a second piece of polymeric material.Type: ApplicationFiled: July 23, 2007Publication date: January 29, 2009Applicant: AmSafe, Inc.Inventors: David T. Merrill, Mike Ward, Willard F. Hagan, Mark Breece, Todd Humbert
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Publication number: 20090011350Abstract: A method to produce a conductive transfer roller, and the transfer roller. The method to produce the conductive transfer roller includes adding and mixing a conductive substance, an ionic conductive agent, a vulcanizing agent, and a blowing agent and at least one of elastic materials selected from a group consisting of EPMD (ethylene propylene) rubber, NBR (acrylonitrile butadiene) rubber, ECO (epichlorohydrin ethylene oxide) rubber, and CR (chloroprene rubber), extruding the compound, blowing the extruded material by passing it through a continuous mobile foaming device, pressing the foam onto a shaft and applying a secondary curing, and grinding the foam to a desired thickness.Type: ApplicationFiled: December 13, 2007Publication date: January 8, 2009Applicant: Samsung Electronics Co., LtdInventor: Young-phil JI
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Publication number: 20090011216Abstract: A method of making a molded resin product includes the steps of (i) providing a plurality of liquid resin components that each include a reaction monomer for a resin, wherein at least one of the liquid resin components includes a catalyst, at least one of the liquid resin components includes an activator, and at least one of the liquid resin components includes thermally expandable microspheres, (ii) mixing the liquid resin components; and (iii) injecting the mixed liquid resin components into a mold at a predetermined temperature. The predetermined temperature is at least 10° C. lower than an expansion start temperature of the thermally expandable microspheres.Type: ApplicationFiled: July 2, 2007Publication date: January 8, 2009Inventors: Youji Suzuki, Takeshi Kato
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Publication number: 20090008812Abstract: Plastic material and nucleating agent are fed into an extruder, and the plastic material is subjected to cell forming. The substances in question are extruded into a plastic film preform, simultaneously cooling the material to prevent foaming. The film preform is stretched in such a way that cavitation bubbles are generated in the film. The cell forming takes place in connection with stretching and relaxation. In other words, in the solution the cell forming is caused to take place when the plastic is not in a molten state.Type: ApplicationFiled: February 22, 2007Publication date: January 8, 2009Applicant: CONENOR OYInventor: Kari Kirjavainen
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Patent number: 7459109Abstract: A method for manufacturing foam pads includes a first step of preparing a proper amount of PVC power, DOP curing agent, light calcium carbonate, kaolin, foaming agent and pigment and pouring them into a blending device to be blended and form a liquid starchy material. Next, the liquid starchy material is conveyed into an intermediate material barrel and kept stationary for pre-foaming at normal temperature for about 8 hours and then coated on a conveyer pelt to form a starchy material layer. Subsequently, the starchy material layer is kept stationary and heated at 80-90° C. for about 3-10 minutes and then continuously heated at 185-200° C. for about 20-30 minutes to form an integral-sheeted foam pad. After cooled, the integral-sheeted foam pad is thermo-compressed and cut into various foam pad products.Type: GrantFiled: September 23, 2005Date of Patent: December 2, 2008Inventor: Wen Shan Lin
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Publication number: 20080284051Abstract: A foaming jig (35) with a refrigerator cabinet (13) is enclosed in a vacuum chamber (25); a metered quantity of a polyurethane mixture is then fed into the hollow walls of the refrigerator cabinet (13), making the foam to growth by generating a vacuum degree in the vacuum chamber (25) and into the foaming jig (35); the foaming of the cabinet walls (13) can be carried out in a comparatively short time, by using fast reactive polyurethane formulations.Type: ApplicationFiled: July 20, 2005Publication date: November 20, 2008Inventor: Piero Corradi
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Patent number: 7452585Abstract: An article of manufacture comprising a sag-resistant nucleus-forming monolithic composite capable of being located within a hollow interior portion of a structural material and being expanded therein. Also, articles of manufacture comprising open-cellular structural material containing within the open-cell or cell thereof, at least one sag-resistant nucleus-forming monolithic composite. The composite is desirably in the shape of a plug that is similar or close to similar to the shape of the hollow interior. In addition, there is described a process that comprises forming a pre-shaped sag-resistant nucleus-forming monolithic composite for use in reinforcing and stiffening a normally open-cellular structural material. Also described is a process for reinforcing or stiffening a normally open-cellular structure, any tubular structure, or any channel structure, by putting at least one sag-resistant nucleus-forming monolithic composite within a hollow interior portion of the structure.Type: GrantFiled: September 2, 2003Date of Patent: November 18, 2008Assignee: Henkel CorporationInventors: Raymond S. Wong, Stanley L. Lehmann, Wei Helen Li
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Patent number: 7445736Abstract: This invention provides method for placing indicia on a support for an imaging element comprising embossing indicia, such as a logo, on a roller; providing a support wherein said support comprises a closed cell foam core and adhered thereto at least one flange layer, wherein said closed cell foam core comprises a polymer that has been expanded through the use of a blowing agent; and pressing said support against said embossed roller.Type: GrantFiled: December 23, 2002Date of Patent: November 4, 2008Assignee: Eastman Kodak CompanyInventors: Margaret J. Helber, John E. Benson, Peter T. Aylward, Barry M. Brown
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Patent number: 7438840Abstract: The method for introducing an additive into a flowing stream of media pulses discrete quantities of the additive into the stream at a pressure higher than the pressure of the stream and at set time periods to cause the pulses to penetrate into the stream. Use is made of a nozzle that can introduce the additive in flow and counterflow to the stream of media.Type: GrantFiled: October 5, 2004Date of Patent: October 21, 2008Assignee: Sulzer Chemtech AGInventor: Georg Michael Ickinger
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Patent number: 7435365Abstract: A method of making a hollow foaming member is to utilize the foaming agents with various decomposition speeds or gas issued into the rubber sheet in the die while vulcanization and foaming. As a result, the foaming member made by the method of the present invention has an air cell therein.Type: GrantFiled: March 18, 2005Date of Patent: October 14, 2008Assignee: Shiun Jiug Industrial Co., Ltd.Inventor: Semi Kao
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Patent number: 7431872Abstract: A low-pressure CO2 tank or an air compressor with a refrigerated air dryer is attached to the vent zone of a standard twin-screw extruder. During extrusion, the gas is dissolved in the wood-plastic melt. The CO2 expands which foams the wood-plastic material.Type: GrantFiled: April 26, 2002Date of Patent: October 7, 2008Assignee: Washington State UniversityInventors: David F. Dostal, Michael P. Wolcott
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Publication number: 20080220204Abstract: A display panel includes a sheet having first and second spaced apart surfaces defining a space therebetween and a plurality of partitions extending from the first surface to the second surface and dividing the space into a plurality of cells, wherein the thickness of each partition is in a range of 0.01 to 10 ?m.Type: ApplicationFiled: March 6, 2008Publication date: September 11, 2008Inventors: Masaru Ohgaki, Masahiro Masuzawa, Toshihiro Kanematsu, Shinji Aoki, Shinya Seno, Hisayoshi Ohshima
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Publication number: 20080203597Abstract: A method for supplying molten polymer and expanding agent flows to a mixing area, by dispersing the expanding agent in a polymer melt by a rapid dividing mixing in a first static mixer, holding and intensively dividingly mixing the thus obtained mixture in a second static mixer, cooling the mixture, during mixing, in a third static mixer to an intermediate temperature, cooling the mixture to a granulation temperature, extruding polymer threads and subsequently quenching and granulating them. During processing, a weight ratio between the polymer melt flow Gp and the expanding agent flow GBA ranges from 13.0 to 19.0, a temperature in the first static mixer for rapid dividing mixing is calculated according to formula (I), in the second and third static mixed according to formulas (II) and (III), respectively, wherein GBA max. is the quantity of a maximum possible expanding agent flow, GBBct.Type: ApplicationFiled: February 15, 2006Publication date: August 28, 2008Inventors: Maxim Nikolaevich Rogov, Halyl Halafovich Rahimov, Marat Hafisovich Ishmijarov, Sergei Ivanovich Mjachin, Alexej Vladimirovich Prokopenko, Alexandr Alexeevich Krasheninnikov, Irina Vladimirovna Mjasitsheva, Leonid Isaakovich Ginzburg, Eugenia Michailova Tarkova
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Patent number: 7396497Abstract: The present invention provides a method of forming a chemical mechanical polishing pad, comprising providing a tank with polymeric materials and providing a storage hopper with microspheres having an initial bulk density, wherein the storage hopper further comprises a porous membrane provided over a plenum. The method further provides the steps of connecting a fluidizing gas source to the plenum through a gas inlet line and fluidizing the microspheres and reducing the initial bulk density by feeding gas into the plenum. In addition, the method further provides the steps of providing a delivery system for delivering the polymeric materials and the microspheres to a mixer, forming a mixture of the polymeric materials and the microspheres, pouring the mixture into a mold to form a molded product and cutting the molded product into the polishing pad.Type: GrantFiled: September 30, 2004Date of Patent: July 8, 2008Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.Inventors: Joseph P. Koetas, Alan E. Leviton, Kari-Ell Norton, Samuel J. November, Malcolm W. Robertson, Alan H. Saikin
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Patent number: 7390445Abstract: A method of producing a composite sheet having a foam layer of a first polyolefin-based resin and a surface layer of a second polyolefin-based resin provided on at least one side of the foam layer and containing a polymeric antistatic agent. The method includes coextruding through die a first melt containing the first polyolefin-based resin and a physical blowing agent and a second melt containing the second polyolefin-based resin, the polymeric antistatic agent and a volatile plasticizer to obtain the composite sheet. The amount of the polymeric antistatic agent is 4 to 100 parts by weight per 100 parts by weight of the second polyolefin-based resin and the amount of the volatile plasticizer is 5 to 50 parts by weight per 100 parts by weight of a total amount of the second polyolefin-based resin and the polymeric antistatic agent. The second polyolefin-based resin has a crystallization temperature of Ta [° C.Type: GrantFiled: June 21, 2004Date of Patent: June 24, 2008Assignee: JSP CorporationInventors: Kazuhiko Morita, Satoshi Iwasaki, Shinpei Arita
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Publication number: 20080099946Abstract: The present invention is generally directed to methods and systems for mitigating flow assurance issues that arise in the pipe transport of hydrocarbon fluids, particularly wherein such hydrocarbon fluids are gas-dominated. Generally, such methods and systems rely on the formation and subsequent transport of a foam through an associated transport pipe.Type: ApplicationFiled: October 31, 2006Publication date: May 1, 2008Applicant: Chevron U.S.A. Inc.Inventors: Gene E. Kouba, Alberto Montesi, Lee D. Rhyne
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Publication number: 20080093762Abstract: A method for making foam products steps of preparing variety of foam materials with different colors, mixing the materials in a final tank, feeding the materials in a mold, heating the materials which are then foamed to form a product which is then removed from the mold and cooled. The method is proceeded by a device which includes first tanks for receiving the variety of foam materials, second tanks for being fed with pre-set amount of the variety of foam materials, and a final tank which has mixture of the variety of foam materials. The mixture is then sent to a mold to be heated and foamed.Type: ApplicationFiled: October 5, 2006Publication date: April 24, 2008Inventor: Min Hui Wang
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Publication number: 20080083488Abstract: A method of manufacturing a blank for a floatation device is disclosed. Polystyrene material is introduced into an extruder and heated. The molten polystyrene is then blown with carbon dioxide to form a polystyrene foam that is extruded into a sizing tunnel to create a desired cross-section for a floatation device blank. The carbon dioxide pressure is preset to provide a resulting polystyrene foam having desired rigidity and density characteristics, and other softening agents may be used to achieve desired rigidity and density characteristics. The extruded polystyrene foam is then cut into blocks of predetermined length, which are then cut and shaped into a desired floatation device blank that may be finished as with conventional blanks.Type: ApplicationFiled: October 6, 2006Publication date: April 10, 2008Inventor: Jorg Warmuth
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Patent number: 7351363Abstract: A press for rigid foam sheets with continuous adjustment of the spacing between the two press plates (1,3), in particular for sandwich panels with an upper and lower outer layer and, located therebetween, a core of rigid polyurethane foam. The lower press plate (3) is here moved into a preselected position corresponding to the panel thickness to be foamed by means of synchronously rotating threaded lifting spindles (4), assisted by weight-compensating cylinders (5). Short-stroke cylinders (6) are provided between the heads of the threaded lifting spindles (4) and the lower press plate (3). Said short-stroke cylinders have the function of dissipating the moulding force which has arisen due to foaming by moving the press plate (3) a very small stroke downwards. It is also possible, instead of the short-stroke cylinders (6), to install an air cushion system, which has a stroke of approx. 1 mm, between the press plate and the heating plate. This stroke is sufficient to dissipate the foaming pressure.Type: GrantFiled: October 11, 2002Date of Patent: April 1, 2008Assignee: Hennecke GmbHInventor: Carsten Ramcke
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Patent number: 7341683Abstract: The present invention solves the problems left unaddressed by the prior known processes by providing a method to produce foamed-thermoplastic films of sufficient strength for use in consumer trash-bag applications utilizing high strength thermoplastic resins. Most broadly, the present invention comprises a blown-film bag formed from a material comprising a matrix of foamed polyolefin-based film and gaseous cells formed from a foaming agent.Type: GrantFiled: January 23, 2003Date of Patent: March 11, 2008Assignee: Vinxi, L.L.C.Inventor: John Charles Marrelli
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Patent number: 7338980Abstract: A piston pump has a piston and cylinder. A gas is supplied into the cylinder during and/or after a suction stroke of the piston pump, and a high-viscosity material is supplied into the cylinder after the suction stroke. A discharge stroke of the piston pump is effected after completion of supply of the high-viscosity material to thereby discharge the gas and high-viscosity material into a pipe. Use is made of piston pumps 45A and 45B, each including a cylinder and a piston which reciprocally moves within the cylinder to effect the suction stroke and discharge stroke, and a membrane gas generator 10 to which compressed air is supplied to generate a gas. A low-pressure gas generated by the membrane gas generator 10 is supplied into each piston pump and the high-viscosity material is introduced into the gas.Type: GrantFiled: May 9, 2002Date of Patent: March 4, 2008Assignees: Sunstar Giken Kabushiki Kaisha, Sunstar Suisse SAInventors: Shinji Okuda, Masaharu Takada, Yasuyuki Yoshimoto
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Publication number: 20080026200Abstract: A mold for an optical plate includes a first core having a first surface; a second core opposite to the first core to form a molding space and having a second surface, the first surface and the second surface defining the molding space; and a specular layer formed on at least one of the first surface or the second surface.Type: ApplicationFiled: July 30, 2007Publication date: January 31, 2008Inventor: Tae-seok Kim
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Patent number: 7306754Abstract: The invention relates to a membrane that consists of a polymer or a polymer mixture. The aim of the invention is to produce membranes, especially planar membranes or hollow fiber membranes that have an as high a separation efficiency as possible while simultaneously having a high membrane efficiency. To this end, the membrane has a gas- or liquid-permeable bicontinuous foam structure with orifices in the interior whose diameters do not exceed 500 nm.Type: GrantFiled: June 15, 2001Date of Patent: December 11, 2007Assignee: Universitat TwenteInventors: Bernd Krause, Christel Mohlenkamp, Hylke Sijbesma, Heiner Strahtmann, Matthias Wessling
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Patent number: 7303704Abstract: The present invention discloses a method of manufacturing lightweight ceramics by mixing several raw materials such as a powdered glass material, a powdered alkali silicate, and a water-soluble polymer in a certain proportion to form a dry substrate, and then adding water to mold the substrate into a desired shape; after the water in the substrate is baked dry, heat the substrate until the ceramic is formed. The oxide and hydroxide in the alkali silicate are used to lower the softening point of the powdered glass material, and when the powdered glass material is in the semi fluid state, the air and crystal water brought by the alkali silicate will expand and form air bubbles due to the high temperature.Type: GrantFiled: March 17, 2003Date of Patent: December 4, 2007Inventors: Cheng-Tsung Chang, Ming-Kun Liu
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Patent number: 7303706Abstract: The manufacture of foamed polymer trim parts making use of physical blowing agents requires the diffusion and sorption of the blowing agent in the polymer melt. Said diffusion and sorption are achieved by intensive mixing. Therefore a statical mixing device is enclosed in a pressure chamber, which comprises a hollow porous cylinder, which has a surface suitable for contacting the melt with the blowing agent. The protrusions extending at least partially into the melt flow cause a multiple reorganisation of the polymer melt, which leads to thorough mixing and shortens the diffusion path. The statical mixing device, which may be of modular construction, increases mass transport and mixing by a small modification of a conventional injection molding machine.Type: GrantFiled: September 13, 2002Date of Patent: December 4, 2007Assignee: Peguform GmbHInventor: Christian Schlummer
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Publication number: 20070267772Abstract: A process for the production of foamed plastic bodies, including the steps: introducing a physical foaming agent into the plasticised plastic material which is in the plasticising unit and which is to be foamed, wherein the physical foaming agent is introduced into the plasticised plastic material at a pressure of more than 180 bars, preferably more than 300 bars, particularly preferably more than 350 bars, injecting the plastic material provided with physical foaming agent into the tool cavity of the injection moulding machine, and decompression of the molten plastic material by expansion of the tool cavity.Type: ApplicationFiled: May 14, 2007Publication date: November 22, 2007Inventors: Michael Fischer, Mark Voelkel
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Patent number: 7294295Abstract: While steam is supplied to flow channels to heat inner cavity surfaces to a temperature equal to or higher than the heat distortion temperature of a molding resin, the resin mixed with a supercritical fluid is injected from an injection molding machine into a mold cavity. When the injection of a predetermined quantity of the resin is completed, the supply of the steam to the flow channels is stopped, and cooling water starts to be supplied to the flow channels. The inner cavity surfaces are thus quickly switched from a heated state to a cooled state, cooling and solidifying the resin into a molded product of good appearance which is free of broken cell marks on its surface.Type: GrantFiled: January 9, 2004Date of Patent: November 13, 2007Assignee: Ono Sangyo Co., Ltd.Inventors: Kazuo Sakamoto, Taiko Uno
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Patent number: 7285233Abstract: A method of manufacturing a polishing pad is described. A mold having a mold cavity therein is provided. At least a strip is buried in the mold. A polymer foam material is injected into the mold cavity of the mold. The polymer foam material is cured to mold the polymer foam material into a molding polymer article. A mold release process is performed to obtain the molding polymer article. The strip on the molding article is removed to form a polishing pad having at least one groove thereon.Type: GrantFiled: January 10, 2006Date of Patent: October 23, 2007Assignee: IV Technologies Co., Ltd.Inventors: Wen-Chang Shih, Yung-Chung Chang, Min-Kuei Chu, Lung-Chen Wei
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Patent number: 7276191Abstract: A method and device for forming a cross-linked foam and a cross-linked foam are provided. The method includes the steps of preparing at least one foaming material for cross-linked foaming, the foaming material processed to have a plane or three-dimensional shape; forming at least one interfacing pattern on a surface of at least one of the foaming material using at least one interfacing material that prevents chemical and physical interaction between the foaming materials; and forming a cross-linked foam by foaming the foaming material having the interfacing pattern thereon, the cross-linked foam having a foam body and an internally-formed surface.Type: GrantFiled: July 20, 2004Date of Patent: October 2, 2007Inventor: Jang Won Park
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Patent number: 7259189Abstract: A process for the production of expanded beads, including kneading a base resin containing a polypropylene resin and having a tensile modulus of at least 1,200 MPa together with a mixture of a coloring agent and a thermoplastic polymer having a tensile modulus lower than that of the base resin to form a kneaded mixture including a matrix of the base resin and a multiplicity of domains dispersed in the matrix and each containing the thermoplastic polymer and the coloring agent. The kneaded mixture is formed into resin particles, then treated with an organic peroxide to modify surfaces of the resin particles therewith. Foaming and expanding of the surface-modified resin particles gives expanded beads having an inside region surrounded by a surface region. The heat of fusion of a high temperature peak of the surface region is lower than that of the inside region.Type: GrantFiled: May 28, 2004Date of Patent: August 21, 2007Assignee: JSP CorporationInventors: Keiichi Hashimoto, Akinobu Hira, Hidehiro Sasaki
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Publication number: 20070187859Abstract: A foaming molten resin containing reinforcement fibers and super critical fluid is injected into a cavity with a short shot (a), the foaming molten resin is made self-foam and flow in the cavity (b), and a volume of the cavity is increased by expanding molds so as to expand the foaming molten resin in the cavity (c). During the expansion step (c), the expansion of the foaming molten resin is assisted by gas vent, vacuum suction, partial pressure adding with gas or resin, or a spring back force of the reinforcement fiber in the foaming molten resin. Accordingly, there can be provided a resin foam molded article that has no improperly large air voids therein, a sufficient volume expansion thereof, and a superior transferability function.Type: ApplicationFiled: January 3, 2007Publication date: August 16, 2007Inventors: Mitsuharu Kaneko, Takahiro Tochioka, Junichi Ogawa