Synthetic Resin Or Polymer Patents (Class 428/394)
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Patent number: 6403216Abstract: A synthetic fiber which is excellent in moisture-absorbing/releasing property and exhibits high elongation and high stretch recovery, characterized in that it has moisture absorption ratios of 0.5 to 4.0% by weight in environments of 20° C.×65% RH and that of 4.5% by weight or more in environments of 30° C.×90% RH, respectively, and also has a difference between the absorption ratios in both the environments of 4.0% by weight or more. The representative examples of such fibers include polyurethane synthetic fiber and polyether synthetic fiber. The synthetic fiber maintains a high strength at break of an elastic fiber component thereof also in the state of having absorbed moisture, is excellent in color fastness to rubbing, and can be used for manufacturing a stretch fiber fabric product excellent in comfort through blending with another fiber material.Type: GrantFiled: August 9, 2001Date of Patent: June 11, 2002Assignee: Asahi Kasei Kabushiki KaishaInventors: Masanori Doi, Takeshi Sugaya, Sueo Ohashi
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Patent number: 6399194Abstract: The present invention offers polypropylene terephthalate textured yarn which has little dyeing unevenness or fibrillation, and is outstanding in its product quality, by carrying out texturing at the same time as drawing under specified conditions using polypropylene undrawn yarn; together with a method for the production thereof.Type: GrantFiled: May 24, 2001Date of Patent: June 4, 2002Assignee: Toray Industries, Inc.Inventors: Hideaki Kunisada, Katsuhiko Mochizuki, Koji Sugano, Yuhei Maeda
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Patent number: 6399741Abstract: Polymer derivatives based upon polyalkyleneimine backbones having a color stabilizing-effective amount of their reactive amino functionalities substituted by either a carboxylic acid or an amino-protecting group such as urea, are disclosed. Methods for preparing said derivatives are also disclosed. Fiber lubricant compositions comprising said polymer derivatives, and the resistance to yellowing associated with such lubricants are disclosed. Also disclosed are methods for treating fibers using the polymer derivatives.Type: GrantFiled: March 12, 2001Date of Patent: June 4, 2002Assignee: Cognis CorporationInventors: Douglas F. Fry, Frank Norman Tuller
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Patent number: 6376071Abstract: The present invention relates to polyurethane based fiber containing 0.1-25 percent poly(vinylidene fluoride) and a method of making the same.Type: GrantFiled: February 20, 2001Date of Patent: April 23, 2002Assignee: DuPont-Toray Co. Ltd.Inventors: Toshihiro Tanaka, Masahi Hara, Masao Umezawa
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Patent number: 6368711Abstract: Disclosed are carbon fibers consisting of a plurality of single filaments, wherein the carbon fibers as a resin impregnated strand are characterized by satisfying the following relations: &sgr;≧11.1-0.75d where &sgr; is the tensile strength of said carbon fibers as a resin impregnated strand in GPa, and d is the average diameter of said single filaments in &mgr;m, and RD≧0.05 where RD is the difference in crystallinity between the inner and outer layers of each of the single filaments evaluated with RAMAN, and an acrylic fibers for producing the carbon fibers and a process for producing the acrylic fibers.Type: GrantFiled: January 17, 2001Date of Patent: April 9, 2002Assignee: Toray Industries, Inc.Inventors: Yoji Matsuhisa, Makoto Kibayashi, Katsumi Yamasaki, Akira Okuda
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Patent number: 6368687Abstract: A low trauma pressure-sensitive adhesive coated substrate comprising a sheet material, tape or laminate structure designed to adhere to skin or like surfaces. The pressure-sensitive adhesive layer of this adhesive coated substrate is a fibrous adhesive layer generally having a basis weight of from 5 to 200 g/m2 applied to a conformable backing or substrate. The fibrous adhesive layer has a textured outer face and persistent porosity between discrete adhesive fibers. Generally, the fibrous adhesive layer has a MVTR (measured by ASTM E 96-80 at 40° C.) of at least 1000 g/m2/day, preferably at least 6000 g/m2/day.Type: GrantFiled: December 1, 1998Date of Patent: April 9, 2002Assignee: 3M Innovative Properties CompanyInventors: Eugene G. Joseph, Richard Ferber, Donald Battles, Joseph Tucker, James K. Young
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Patent number: 6365272Abstract: A two-part sizing system for making colorless, densified fiber pellets of a reinforcing fiber material. The densified product may be advantageously produced by first applying a precursor size composition to reinforcing fiber strands, chopping the reinforcing fiber strands into chopped strand segments, applying a binder size, and densifying the chopped strand segments to form densified fiber pellets. The binder size is formulated using a copolymer of maleic anhydride which generates a product free from discoloration. In the process of making the pellets, the sized chopped strands are densified by tumbling in a rotating chamber for a period of time sufficient to increase their density but insufficient to degrade the fibers to a point where composite articles formed from such pellets have lower tensile or impact strengths than comparable composite articles formed from unpelletized strand segments.Type: GrantFiled: December 29, 1999Date of Patent: April 2, 2002Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Nadia Masson, Jean-Marc Henrion, James Laurence Thomason, Leonard Joseph Adzima, Terry Linn Cheney, Willy Piret, Marc Cossement
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Publication number: 20020037406Abstract: This invention relates to the single fiber having superior deodorization and hygroscopicity since carbon powder is contained inside thereof, the processed work and the cotton work thereof, and the producing wherein there is no blocking on an injection nozzle and a disagreeable smell does not occur when carbon powder is contained to the processed work and the cotton work, and whereof the single fiber wherein it is comprised by melting and spinning out of synthetic resin pellet compounding 1-30 weight % of fine carbon powder having 20 &mgr;m or less as pigment, the processed work and the cotton work wherein carbon powder is contained on the fiber surface and/or inside of the fibers, the producing of the processed work, wherein diluted solution of emulsion comprises at least carbon powder, surfactant and water is sprayed or immersed to the processed work and the work is dried with heating.Type: ApplicationFiled: July 31, 2001Publication date: March 28, 2002Inventor: Hisato Takashima
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Publication number: 20020037408Abstract: Disclosed herein is a polyolefin splittable conjugate fiber comprising at least two components of polyolefin resins (including polystyrene resins) and having a cross sectional structure with each of the components arranged alternately, wherein at least one of the component resins contains 1-30% by weight of an ethylene-vinyl alcohol copolymer whose saponification degree is 95% or more. Using the splittable conjugate fiber of the invention, a fiber structure having a fine and even surface can be provided.Type: ApplicationFiled: June 22, 2001Publication date: March 28, 2002Inventors: Toshihiko Tsutsui, Masaru Nishijima, Kazuyuki Sakamoto
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Patent number: 6358610Abstract: Rubber reinforcing polyester filament cord having flexibility, adhesiveness to halogenated butyl rubber and EPDM rubber, and smoothness; comprising a polyester filament yarn with a surface coating of an aromatic polyepoxide, initial condensation product of resorcin-formaldehyde (A) and a rubber latex (B), single-twisted at 3-150 turns per meter to make a twisted cord and satisfying properties (a) to (c): (a) about 0.15 to 0.35 coefficient of dynamic friction between filament cord and smooth metal, (b) about 0.05 or less variation of coefficient of dynamic friction between filament cord and smooth metal, and (c) about 3 wt % or more rubber remaining after standard cord stripping test.Type: GrantFiled: April 14, 1999Date of Patent: March 19, 2002Assignee: Toray Industries, Inc.Inventors: Masaharu Taniguchi, Tomoharu Kumaki, Yasumi Kanda
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Patent number: 6352773Abstract: A process for flash spinning polymethylpentene alone or as a blend with polyethylene or polypropylene using various spin agents having essentially zero or very low ozone depletion potential.Type: GrantFiled: February 26, 2001Date of Patent: March 5, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Rashi Akki, Hyunkook Shin
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Patent number: 6348263Abstract: A dyeable polyparaphenylene terephthalamide fiber which has been wound once after spinning and has not been dyed yet, characterized in that it has a tensile strength of 15 g/denier or more and a crystal size (110 direction) of 30 to 55 angstroms and has no history of a treatment drying to have a water content of 8% or less, and a method for producing the same. A polyparaphenylene terephthalamide fiber which can be dyed while its properties of high strength and high modulus elasticity are maintained, and textile products made of the fiber which are dyed in a variety of colors, can be provided.Type: GrantFiled: December 20, 2000Date of Patent: February 19, 2002Assignee: DuPont-Toray Co., Ltd.Inventors: Takeshi Hatano, Shiro Sakamoto, Kazuhiko Kosuge
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Patent number: 6348255Abstract: An artificial leather strip, and methods of making such a strip. The synthetic leather strip is suitable for sporting applications such as lacing baseball gloves and shoes. The strip comprises at least one reinforcing cord embedded in a matrix. The matrix comprises PVC and additives such as nitrile rubber and/or urethane, and is sufficiently tough to resist the “cheesecutter” effect when the strip is flexed, for example by being tied in a knot.Type: GrantFiled: April 29, 1998Date of Patent: February 19, 2002Assignee: Brockton Plastics, Inc.Inventor: Daniel C. Harkins, Sr.
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Publication number: 20020009588Abstract: Disclosed are carbon fibers consisting of a plurality of single filaments, wherein the carbon fibers as a resin impregnated strand are characterized by satisfying the following relations: &sgr;≧11.1−0.75d where &sgr; is the tensile strength of said carbon fibers as a resin impregnated strand in GPa, and d is the average diameter of said single filaments in &mgr;m, and RD≦0.05 where RD is the difference in crystallinity between the inner and outer layers of each of the single filaments evaluated with RAMAN, and an acrylic fibers for producing the carbon fibers and a process for producing the acrylic fibers.Type: ApplicationFiled: January 17, 2001Publication date: January 24, 2002Applicant: Toray Industries, Inc.Inventors: Yoji Matsuhisa, Makoto Kibayashi, Katsumi Yamasaki, Akira Okuda
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Publication number: 20020010306Abstract: Disclosed is a member of nylon 12 having a relative viscosity of from 1.9 to 3.5 when measured in 98% sulfuric acid at a concentration of 10 g/dm3 and at 25° C. and a melt flow rate of 0.1 g/10 min. or more when measured at 235° C.Type: ApplicationFiled: August 7, 2001Publication date: January 24, 2002Applicant: Ube Industries, Ltd.Inventors: Noriyuki Isobe, Tetsuji Hirano, Kouichiro Kurachi, Nobuhiro Ogawa
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Publication number: 20020007041Abstract: Polyamides including functional groups and methods of preparing such polyamides. The polyamides are useful, for example, to prepare filaments.Type: ApplicationFiled: January 9, 2001Publication date: January 17, 2002Inventor: George E. Zahr
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Publication number: 20020007040Abstract: A process for increasing the relative viscosity (RV) of a reactant polyamide and to products produced by the process. The process includes contacting the reactant polyamide and a chain extender compound, forming the product, and quenching the product when its RV is near its maximum calculated RV value.Type: ApplicationFiled: January 10, 2001Publication date: January 17, 2002Inventor: George E Zahr
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Patent number: 6333107Abstract: An electroconductive fiber comprising a fibrous core material whose surface is coated with an electroconductive substance, the fibrous core material having an average fiber length of 1 to 5 &mgr;m, an average fiber diameter of 0.01 to 0.5 &mgr;m and an aspect ratio of 3 or more, electroconductive resin composition containg the electroconductive fibers, and electroconductive thread prepared by spinning the electroconductive resin composition.Type: GrantFiled: August 18, 2000Date of Patent: December 25, 2001Assignee: Otsuka Kagaku Kabushiki KaishaInventors: Hiroshi Ogawa, Jun Ogawa, Hiroyuki Monde
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Patent number: 6333391Abstract: A process for the preparation of an oligomeric polyimide comprises: mixing a tetracarboxylic acid, a dianhydride, a partially hydrolysed dianhydride or a mixture thereof with a diamine in a reaction medium comprising greater than 80% by weight water, and heating mixture in said reaction medium at a temperature above 100° C. for a time sufficient to form said oligomeric polyimide.Type: GrantFiled: April 21, 2000Date of Patent: December 25, 2001Assignees: Commonwealth Scientific and Industrial Research Organisation, The Boeing CompanyInventors: Bronwyn Glenice Laycock, David Geoffrey Hawthorne, Jonathan Howard Hodgkin, Trevor Charles Morton
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Patent number: 6333105Abstract: A molding material comprising a reinforcing fiber 1 bundle evenly sheathed by a resin layer 2 and having an oblong shape with at least two lengthwise faces that are flat faces 3; and a method involving thermal preforming of a given amount of the molding material and placing the preformed material into a mold for molding through application of heat and pressure, affording lightweight high-strength molded articles, such as safety shoe toe caps, in high yield.Type: GrantFiled: February 17, 2000Date of Patent: December 25, 2001Assignee: YKK CorporationInventors: Yoshiharu Tanaka, Takato Takizawa
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Patent number: 6325939Abstract: A polymeric resin is disclosed in the form of beads or particles having a coating thereon which renders the resin blood compatible. The resin comprises divinylbenzene monomer which has a porosity, pore size, and surface area suitable for absorbtion of unhealthy components of blood, such as &bgr;-2-microglobulin.Type: GrantFiled: May 21, 2001Date of Patent: December 4, 2001Assignee: The Dow Chemical CompanyInventors: Robert M. Strom, Daniel J. Murray
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Patent number: 6319601Abstract: Polyvinyl alcohol based fibers having good fatigue resistance, dipped cords comprising the polyvinyl alcohol based fibers and having good fatigue resistance, and a method for producing the dipped cords. The polyvinyl alcohol based fibers have a tan&dgr; at 90° C. of at least 0.12, substantially one peak of tan&dgr; within a temperature range of from 60 to 120° C., and an elongation at break of at least 12%.Type: GrantFiled: July 17, 2000Date of Patent: November 20, 2001Assignee: Kuraray Co., Ltd.Inventors: Tomokazu Ise, Tetsuo Nishizaki, Toshihiro Hamada, Kiyohiko Sho
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Patent number: 6312802Abstract: A polymer for imparting light resistance to fibers is prepared by radical polymerizing a monomer composition including a specific ultraviolet stabilizable monomer and/or ultraviolet absorptive monomer. A highly light resistant fiber includes the light resistance imparting polymer inside or on the surface of the fiber. The polymer can impart a satisfactory light resistance to fibers over a long time, and the fiber is highly resistant to light.Type: GrantFiled: July 7, 2000Date of Patent: November 6, 2001Assignee: Nippon Shokubai Co., Ltd.Inventors: Toshifumi Nishida, Nobuhisa Noda, Takahiro Aoyama
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Publication number: 20010036785Abstract: An electrically conductive fabric plated with a metal is disclosed wherein a percent fabric surface occupancy of warp as a constituent of the fabric is 90% to 110% and that of weft is 40% to 80%. The electrically conductive fabric is superior in all of resin back leak preventing property, flexibility yarn fray preventing property, electrical conductivity and electromagnetic wave shieldability.Type: ApplicationFiled: March 27, 2001Publication date: November 1, 2001Applicant: SEIREN CO., LTD.Inventors: Susumu Takagi, Shigekazu Orita
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Patent number: 6309752Abstract: Compositions comprising a fluorochemical agent, a copolymer extender, and a blocked isocyanate extender and substrates treated with such compositions that possess high initial water repellency and laundry durable water repellency.Type: GrantFiled: January 14, 1999Date of Patent: October 30, 2001Assignee: 3M Innovative Properties CompanyInventors: Rudolf J. Dams, Johan E. DeWitte, Christoffel C. Maes
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Patent number: 6300463Abstract: Thermoplastic elastomeric polymers which contain polyether blocks having tetramethylene ether repeat units, and polyamide blocks, have improved elastomeric properties such as higher unload power and lower tensile set, when the polyether blocks also contain 2-alkyltetramethylene ether repeat units. The polymers are useful as molding resins and for fibers.Type: GrantFiled: January 4, 2000Date of Patent: October 9, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Garret Daniel Figuly, Marc Bruce Goldfinger
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Patent number: 6296936Abstract: An improved coform material having a plurality of synthetic fibers, a plurality of natural fibers commingled with the plurality of synthetic fibers and a treatment system including a surfactant selected from the group consisting of ethoxylated hydrogenated fatty oils, monosaccharides, monosaccharide derivatives, polysaccharides, polysaccharide derivatives, and combinations thereof, applied to the synthetic fibers. The integrated composite material is particularly suitable for use in personal care absorbent articles such as feminine hygiene products, diapers, training pants, absorbent underpants, and adult incontinence products.Type: GrantFiled: January 30, 1998Date of Patent: October 2, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Ali Yahiaoui, Charles Edward Bolian, II, Daryl Steven Bell, Nancy Ann Secen
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Patent number: 6296933Abstract: A hydrophilic fiber which is a fiber having the ratio of the perimeter occupied by a polyolefin to the whole perimeter of the fiber cross section of 30% or above, the hydrophilic property of the fiber of 30 seconds or below and the retention of the hydrophilic property of the fiber with the lapse of time of 90% or above before and after treatment at a temperature of 40° C. and a relative humidity of 80% with the lapse of time of 30 days, with the proviso that the hydrophilic property of the fiber is measured by the following method: The interior of a pipe made of polymethyl methacrylate and having an inside diameter of 25 mm, an outside diameter of 30 mm and a pipe length of 25 mm is stuffed with 5.0 grams of fibers so as not to protrude the fibers. Said pipe is floated on 1,000 cc of softened water at 30° C. in a container having a caliber of 105 mm &phgr; and filled with the water, allowed to stand and once sunk to the bottom.Type: GrantFiled: November 6, 2000Date of Patent: October 2, 2001Assignee: Teijin LimitedInventors: Hironori Goda, Mikio Tashiro
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Patent number: 6287679Abstract: A method for forming a water swellable coating and a water swellable coating for forming a coated substrate are provided. The water swellable coatings are semi-gel dispersions of particulate superabsorbent polymer in a polyvinyl chloride plastisol. A dispersion is formed from the polymer and plastisol, then contacted with a substrate and heat cured to a semi-gel state. The coatings are capable of swelling in the presence of water to protect the substrates from water penetration, block water from penetrating the coatings to reach other substrates or to retain water to prevent leakage.Type: GrantFiled: January 22, 1998Date of Patent: September 11, 2001Assignee: Fiber-Line, Inc.Inventors: Vincent J. Pappas, Louis A. Vitola, Vernon Z. Detwiler
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Patent number: 6284371Abstract: The invention relates to a spinning process, more particularly a dry spinning process, for the production of elastane fibers in which 0.8 to 2% by weight of polydimethylsiloxane with a viscosity of 50 to 300 cSt and 0.2 to 0.6% by weight of ethoxylated polydimethylsiloxane with a viscosity of 20 to 150 cSt are added to the elastane spinning solution before it is spun.Type: GrantFiled: June 30, 2000Date of Patent: September 4, 2001Assignee: Bayer AktiengesellschaftInventors: Michael Kausch, Karl-Heinz Wolf, Wolfgang Klein, Konrad Schmitz
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Patent number: 6280841Abstract: A package of polyurethane elastic yarn for heat bonding which weighs more than 1 kg and measures such that the diameter-to-width ratio is greater than 0.5 and which is obtained from polyurethane elastic yarn by giving it 3.0-10.0 wt % of a finishing agent and then winding it up, said finishing agent is polypropylene glycol-based polyol used alone or composed of component (A) which is a polypropylene glycol-based polyol and component (B) which is a reaction product of a polypropylene glycol-based polyol and an organic diisocyanate compound. The finishing agent contains component (B) in an amount less than 30 wt % and have an apparent viscosity of 50-250 mPa·s at 30° C. and a surface tension of 30-45 dyn/cm.Type: GrantFiled: August 18, 1999Date of Patent: August 28, 2001Assignee: Fuji Spinning Co., Ltd.Inventors: Fumio Miyazawa, Nobuya Morishita, Keiko Noda
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Patent number: 6270890Abstract: The floss is made of a plurality of polytetrafluoroethylene filaments and non-polytetrafluoroethylene filaments. The polytetrafluoroethylene filaments provide for a lubricity for the floss to enter more spaces and the non-polytetrafluoroethylene filaments provide for a case in gripping. In the way a range of polytetrafluoroethylene filaments can be used in the construction of a dental floss.Type: GrantFiled: May 10, 1993Date of Patent: August 7, 2001Assignee: Colgate-Palmolive CompanyInventors: John Pierre Curtis, Michael Joseph McGreal
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Patent number: 6270892Abstract: Disclosed is a polypropylene fiber, which is obtained from an isotactic polypropylene homopolymer with an isotactic index of 90 to 99% through melt-spinning or through drawing after melt-spinning, and shows two differential scanning calorimeter (DSC) endothermic peaks between 155 and 170° C. When being thermally bonded with one another, the fibers are made into non-woven fabrics which have excellent strength in addition to being soft. A high quality of the non-woven fabrics can be produced in high speed carding machines with high yields.Type: GrantFiled: June 23, 2000Date of Patent: August 7, 2001Assignee: Pyung Yul ParkInventors: Pyung Yul Park, Won Jun Chey
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Patent number: 6262221Abstract: An improved polyamide resin composition for weldable molded articles which comprises: (a) 99.9-30% by weight of a polyamide-containing compound; (b) 0.1-20% by weight of a plasticizing compound selected from the group consisting of esters of low molecular weight poly(ethylene glycol) having the formula (I) R—COO—(CH2CH2O)n—OC—R (I) wherein R is a branched or straight chain alkyl group having from 1 to 40 carbon atoms, and n is 2 to 20; or a long chain alkyl polyester of formula (II) HOOC—R—CO—(O—R′—O—CO—R—CO)n—O—R′—OH (II) wherein R is alkyl of 16 to 45 carbon atoms, R′ is alkyl of 2 to 6 carbon atoms, or, wherein R is an alkyl of 2 to 6 carbon atoms, R′ is an alkyl of 16 to 45 carbon atoms, and n is 2 to 50.Type: GrantFiled: February 25, 1997Date of Patent: July 17, 2001Assignee: E. I. duPont de Nemours and CompanyInventor: Robert John Palmer
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Patent number: 6258455Abstract: An antimicrobial material having at least one yarn having fine fiber of 1.0 denier or less and at least one yarn having antimicrobial fiber that are engaged with each other, wherein the antimicrobial fibers impart an antimicrobial property to the entire material. In a preferred embodiment, the yarns of fine fiber and yarns of antimicrobial fiber are woven or knitted together. It is further preferred that the fine fiber be less than 0.3 denier, have a diameter of approximately 3 microns, and have a generally triangular cross-section with sharp edges, therefore allowing the fine fiber to substantially remove bacteria, fungi and other microbes from a surface. It is also preferred that the antimicrobial fibers comprise an acetate fiber spun together with polyester to give the antimicrobial fiber added strength.Type: GrantFiled: March 29, 1999Date of Patent: July 10, 2001Assignee: Sweports LimitedInventor: George G. Clarke
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Publication number: 20010006728Abstract: Dipped cords made from melt-spun filament yarns of an alternating copolymer of alkenes and carbon monoxide have a cord twist factor in the range of 120 to 250 and a breaking tenacity BT≧750 mN/tex, a TASE-2>70 mN/tex, and a HAS-2′-180° C. (5 mN/tex)<3.6%. These dipped cords are made by subjecting drawn filament yarns to a dipping treatment. Preference is given to dipped cords having a breaking tenacity BT≧850 mN/tex and a TASE-2>75 mN/tex, which are obtainable from yarns wherein after dipsimulation, the aspect ratio of the crystals 2&Lgr;002/(&Lgr;210+&Lgr;310) varies between 2.3 and 2.7. The cords are preeminently suitable to reinforce rubber articles such as car tires.Type: ApplicationFiled: December 20, 2000Publication date: July 5, 2001Applicant: Acordis Industrial Fibers B.V.Inventors: Johannes Anthonij Juijn, Marcelinus Herman Jozef Hottenhuis, Berend Johan Tabor
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Publication number: 20010006729Abstract: A process for flash spinning polymethylpentene alone or as a blend with polyethylene or polypropylene using various spin agents having essentially zero or very low ozone depletion potential.Type: ApplicationFiled: February 26, 2001Publication date: July 5, 2001Inventors: Rashi Akki, Hyunkook Shin
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Patent number: 6248835Abstract: A polymer blend, fibers manufactured from the blend and method of producing the fibers is disclosed. The polymer blend includes from 92 wt % to 98.5 wt % of a base polypropylene having a melt flow rate of less than 20 g/10 min, and a maximum draw ratio D, a Crimp Stability of CS, when drawn into filaments at 1000 m/sec, and from 8 wt % to 1.5 wt % of an amorphous polystyrene having a melt flow rate of less than 15 g/10 min. The polymer blend is drawable at greater than 800 m/sec to produce filaments having a maximum draw ratio of D2, the ratio of D2: D1, being greater than 1.15:1 and a Crimp Stability of CS2, the ratio of CS2: CS1 being greater than 1.45. Preferably, the base polypropylene has a melt flow rate of between 8 and 15 g/10 min. In one embodiment, the amorphous polystyrene is characterized by a melt flow between 2 and 15 g/10 min.Type: GrantFiled: November 5, 1998Date of Patent: June 19, 2001Assignee: Fina Technology, Inc.Inventors: Mohan Gownder, Baireddy Raghava Reddy, Jay Nguyen
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Patent number: 6245423Abstract: An acrylic fiber tow having a total size of at least 22,000 dtex and a weight variation ratio in the longitudinal direction of not greater than 3.5%, which is useful as a precursor for carbon fiber production.Type: GrantFiled: June 15, 2000Date of Patent: June 12, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Ikeda, Toshihiro Makishima, Nobuyuki Fukuen
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Patent number: 6238791Abstract: The present invention provides fiber strands and products coated with a blend of a hydrophobic fluoroalkylacrylate polymer and an amine-reactive material or a polymerization reaction product of a hydrophobic fluoroalkylacrylate and a amine reactive monomeric material which are useful as reinforcements for nylon composites to inhibit hydrolysis.Type: GrantFiled: April 14, 1998Date of Patent: May 29, 2001Assignee: PPG Industries Ohio, Inc.Inventors: Philip L. Schell, Shrirang Ranade
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Patent number: 6238792Abstract: A terpolymer having units of Formula I wherein X is a C2-10 alkyl, C6-12 aryl, or C4-12 alkoxy radical, d is from about 3 to about 50, R is a fluoroalkyl radical Rf—(A)v—(B)w—, Rf is a fully fluorinated straight or branched aliphatic radical optionally interrupted by at least one oxygen atom, A is a divalent radical selected from —SO2N(R″)—, —CON(R″)—, —S—, or —SO2—, where R″ is H, or a C1-6 alkyl radical, B is a divalent linear hydrocarbon radical —CtH2t—, where t is 1 to 12, Y is a divalent radical —CH2—O—, u, v, and w are each independently zero or 1, R′ is hydrogen or methyl, e is from about 0.05 to about 10, M is hydrogen, alkali metal, or ammonium, and f is from about 5 to about 40, and its use to provide soil resistance and resistance to staining by acid dyes for fiber substrates is disclosed.Type: GrantFiled: June 21, 1999Date of Patent: May 29, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Engelbert Pechhold, Peter Michael Murphy
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Patent number: 6238795Abstract: A polymeric resin is disclosed in the form of beads or particles having a coating thereon which renders the resin blood compatible. The resin comprises divinylbenzene monomer which has a porosity, pore size, and surface area suitable for absorbtion of unhealthy components of blood, such as &bgr;-2-microglobulin.Type: GrantFiled: January 14, 2000Date of Patent: May 29, 2001Assignee: The Dow Chemical CompanyInventors: Robert M. Strom, Daniel J. Murray
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Patent number: 6228489Abstract: Fibrillated acrylic fibers which are suitable for oxidation in the form of staple fibers are formed as copolymers of acrylonitrile and an unsaturated carboxylic acid such as itaconic acid or methacrylic acid. A further monomer may also be included, such as methacrylate, methylmethacrylate or vinyl acetate. Fibers having a Canadian Freeness valve of 350-500, and a decitex value of 1.2 to 1.7 may be produced.Type: GrantFiled: September 20, 1999Date of Patent: May 8, 2001Assignee: Acordis UK LimitedInventors: John Fagge, Ulrich Holzinger
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Patent number: 6228285Abstract: A method for processing thermally intractable rigid-chain polymers into shaped structural articles is provided. The method includes dissolving a rigid-chain polymer in sulfuric acid at a concentration and temperature sufficient to form a nematic liquid crystalline solution which is then formed into a shaped article and cooled to a solid. The solution undergoes a phase transformation upon cooling from a liquid crystalline phase to a solid phase containing crystal solvates. The method allows rigid-chain polymers to be formed into fibers, bulk structural components, fiber reinforced composites and other structural materials without undergoing significant shrinkage or deformation.Type: GrantFiled: June 3, 1998Date of Patent: May 8, 2001Assignee: The University of DaytonInventors: Chyi-Shan Wang, Jar-Wha Lee
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Patent number: 6218010Abstract: The present invention relates to polypropylene copolymer alloys which are especially suited for soft fiber and fabric applications. These alloys comprise an ethylene-propylene random copolymer having an ethylene content of from about 1.0 to 5.0% by weight, in an amount of from about 40 to 90% by weight of the alloy; and an ethylene-propylene bipolymer having an ethylene content of from about 10 to 30% by weight, in an amount of from about 10 to 60% by weight of the alloy. The present invention further relates to fiber and fabric articles made from such alloys.Type: GrantFiled: May 3, 2000Date of Patent: April 17, 2001Assignee: ExxonMobil Chemical Patents Inc.Inventors: George Byron Georgellis, Chia Yung Cheng, William Moa-Tseng Chien
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Patent number: 6218011Abstract: Polyolefin fibers and polyolefin yarns of high strength and elongation and textile fabrics produced therefrom. Polyolefin fibers and polyolefin yarns of high strength and elongation and textile fabrics produced therefrom, which consist of modified propylene polymers, unmodified propylene polymers and adjuvants, are produced by melting the polyolefin mixtures in the extruder, transferring the melt by extrusion pumps to the spinnerets and drawing off the extruded filaments by high-speed galettes and/or winders. The polyolefin fibers and polyolefin yarns of high strength and elongation and the textile fabrics produced therefrom are suitable for the production of textiles for the home, multilayered textiles, industrial textiles, nonwoven materials in medicine and hygiene and elastic hygiene articles.Type: GrantFiled: April 29, 1998Date of Patent: April 17, 2001Assignee: Borealis GmbHInventors: Manfred Raetzsch, Ulf Panzer, Achim Hesse, Norbert Reichelt, Manfred Kirchberger, Peter Niedersuess, Anton Wolfsberger
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Patent number: 6216431Abstract: A composite yarn formed of melt-fusible thermoplastic fibers combined with selected other fibers and/or materials includes a containment barrier that encapsulates one or more core materials which may present a threat of contamination to workers and/or the environment. The composite yarn includes a core covered by an adhesive layer of thermoplastic material which forms a containment barrier, combined with one or more subsequent overlying layers of fibers wrapped or otherwise applied thereto using conventional yarn construction methods. In a preferred embodiment the core material is coated with a liquid adhesive, and preferably a polyester-based polyurethane which contains silicon grit, just prior to being wrapped with one or more layers of fibers which form the containment barrier. The cured and finished composite yarn is designed for knitting and weaving fabrics, or for otherwise forming cordage and non-woven products.Type: GrantFiled: February 23, 1999Date of Patent: April 17, 2001Assignee: World Fibers, Inc.Inventor: Mark A. Andrews
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Patent number: 6214463Abstract: Hydrophilic fibers having a durable hydrophilic property and excellent safety, and fabrics and filters both obtained by using the fibers are provided; the hydrophilic fibers are produced by adhering 0.1 to 1.Type: GrantFiled: December 9, 1998Date of Patent: April 10, 2001Assignee: Chisso CorporationInventors: Masaru Nishijima, Masayasu Suzuki, Satoshi Ogata, Kozo Tanoue
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Patent number: 6210802Abstract: A filler rod for occupying space in a stranded optical fiber communications cable having at least one buffer tube containing at least one optical fiber is disclosed. The filler rod comprises an elongated rod extruded from a polypropylene homopolymer, a polypropylene-polyethylene copolymer (i-PP) resin material, or preferably, from a polypropylene-polyethylene copolymer having a nucleating agent disbursed therein. The resin material is foamed during extrusion so as to have a plurality of void spaces therein and a relative density which is less than 1 relative to the unfoamed resin material. As compared to rods made from high density polyethylene, the i-PP filler rods show a greater foaming efficiency, more efficient use of material, an improved combination of mechanical properties and density, reduced post-extrusion shrinkage and a substantial reduction in the sticking of the filler rods to the outer jacket that is experienced with high density polyethylene filler rods.Type: GrantFiled: February 10, 2000Date of Patent: April 3, 2001Assignee: AlcatelInventors: Brian G. Risch, James D. Holder
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Patent number: 6207275Abstract: This invention pertains to melt spun fibers of copolymers formed from tetra-fluoro ethylene and perfluorovinyl monomers and a process for their formation. In the process of this invention fibers exhibiting high strength and low shrinkage are drawn from the melt at SSFs of at least 500×.Type: GrantFiled: January 4, 2000Date of Patent: March 27, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Glenn William Heffner, William Cheng Uy, Martin Gerald Wagner