Cellulosic Patents (Class 428/393)
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Patent number: 5733633Abstract: A fire resisting slab fabrication method including the steps of i) preparing a first compound by mixing by weight 25%-30% magnesium oxide with 20%-25% magnesium chloride and 10%-15% water at room temperature; ii) preparing a second compound by mixing by weight 15%-20% foamed plastic with 15%-20% wooden chips and 5%-10% quartz sand at room temperature; iii) mixing the first compound with the second compound at room temperature, so as to obtain a mixture; and, iv) processing the mixture thus obtained into a flat core layer by means of a press roll mechanism, and simultaneously covering two layers of meshed glass fiber cloths and two layers of meshed non-woven cloths on two opposite sides of the core layer.Type: GrantFiled: September 18, 1996Date of Patent: March 31, 1998Inventor: Fong Shih Lin
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Patent number: 5731083Abstract: Carboxymethyl cellulose fiber having a degree of substitution of at least 0.1, preferably 0.2-0.5, carboxymethyl groups per glucose unit is derived from solvent-spun cellulose fiber, for example by reaction with a strong alkali and a monochloroacetate reagent. The fiber has an absorbency of at least 8 grams, usually at least 15 grams, 0.9% saline solution per gram of fibre and a tenacity of at least 10, usually at least 15, cN/tex. It can be used for absorbent personal products.Type: GrantFiled: December 6, 1995Date of Patent: March 24, 1998Assignee: Courtaulds PLCInventors: Hardev Singh Bahia, Jim Robert James
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Patent number: 5728461Abstract: Functional fiber products are provided.The functional fiber products are those adhered thereto a protein containing 20% to 40% by weight of serine as an amino acid component and those adhered thereto sericin and deacetylated chitin.Type: GrantFiled: February 7, 1996Date of Patent: March 17, 1998Assignee: Seiren Co., Ltd.Inventors: Akihiro Nogata, Hideyuki Yamada, Masakazu Nomura
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Patent number: 5728462Abstract: A cigarette filter material is provided which is free from the occurrence of acetic acid odor, even after long-term storage in a hermetically sealed condition, which ensures excellent palatability. This cigarette filter material comprises a fiber assembly composed mainly of cellulose diacetate fibers and, contained therein, 80 to 10,000 ppm of a polyvalent metal salt of an acid selected from among organic and inorganic acids.Type: GrantFiled: December 16, 1994Date of Patent: March 17, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Yuriko Arino, Hiroki Taniguchi
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Patent number: 5716703Abstract: Skin wetness is minimized on overnight usage of a disposable absorbent article containing an acquisition and distribution member consisting essentially of C.sub.2 -C.sub.9 polycarboxylic acid crosslinked cellulosic fibers prepared in the presence of surfactant.Type: GrantFiled: July 11, 1996Date of Patent: February 10, 1998Assignee: The Procter & Gamble CompanyInventor: Michael Payne
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Patent number: 5707736Abstract: The invention provides a dry, disposable, polymeric product having sustained-release anti-microbial activity, the product consisting essentially of a polymeric material selected from the group consisting of fibers, fabrics, sheets, films and other stable woven, non-woven and knitted materials prepared from natural, man-made and synthetic polymers and an amine salt anti-microbial agent, the anti-microbial agent being incorporated in the polymeric material without an intermediary adhesive, carrier or linking agent and being releasable therefrom in anti-microbially effective amounts for a period of at least three days upon the product being brought into contact with a moist surface.Type: GrantFiled: June 5, 1995Date of Patent: January 13, 1998Assignees: Sion Texo Medic Ltd., Yissum Research Development Co. of Hebrew Univ. of Jerusalem, Israel Fiber InstituteInventors: David Levy, Hilda Guttmann, Itzhak Kahane
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Patent number: 5700555Abstract: A composite article includes a first zone made entirely of plastic and a second zone made of plastic and natural fiber. The first and second zones are integral and are continuously coextruded. The ratio of natural fiber in the second zone is between 10% and 55%. The outer surface of the second zone includes embossing to resemble wood grain. The outer surface has sufficient porosity so as to hold and retain wood stain and paint so that the composite article is stainable to resemble genuine wood. The composition of the second zone includes between 45% and 90% polyvinylchloride, between 10% and 55% natural fiber, and external lubricate and a fusion enhancer. A color adjusting agent such as titanium dioxide, and coloring agents may also be added.Type: GrantFiled: August 30, 1993Date of Patent: December 23, 1997Assignee: Formtech Enterprises, Inc.Inventor: Otto Grill
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Patent number: 5698478Abstract: Disclosed herein is an ink-jet printing cloth which can be dyed with inks containing a reactive dye and is composed mainly of cellulose fiber, wherein the cloth contains 0.1 to 50% by weight of a cationic substance, 0.01 to 5% by weight of an alkaline substance and 0.01 to 20% by weight of the ammonium salt of a polyvalent acid, the proportions of said cationic and alkaline substances and said ammonium salt being based on the dry weight of the cloth.Type: GrantFiled: October 24, 1995Date of Patent: December 16, 1997Assignee: Canon Kabushiki KaishaInventors: Tomoya Yamamoto, Masahiro Haruta, Shoji Koike, Koromo Shirota, Aya Yoshihira, Mariko Suzuki
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Patent number: 5695874Abstract: A polyvinyl chloride and wood composite pellet by extrusion. The polyvinyl chloride and wood fiber are introduced into the extruder at a ratio of approximately 6:4 by weight, respectively. The polyvinyl chloride is melted and blended with the wood fiber so that the interstitial voids of the wood fiber are filled with polyvinyl chloride. After being extruded through a die, the molten material is cut into pellets having a bulk density of preferably between 0.7 to 0.8 gm/mm.sup.3.Type: GrantFiled: October 20, 1994Date of Patent: December 9, 1997Assignee: Andersen CorporationInventors: Michael J. Deaner, Giuseppe Puppin, Kurt E. Heikkila
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Patent number: 5677058Abstract: Fibers such as caustic-treated non-round polyester fibers are prepared having certain lubricants strongly adhered to the surfaces thereof. These fibers are prepared by contacting the fibers, such as immediately prior to a crimping means, with a suitable heated hydrophilic lubricant in a processing operation followed by heating to dry or "bake" the lubricant onto and/or into the surface of the fibers.Type: GrantFiled: November 15, 1994Date of Patent: October 14, 1997Assignee: Eastman Chemical CompanyInventors: Richard D. Neal, Shriram Bagrodia, Lewis C. Trent, Mark A. Pollock
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Patent number: 5665471Abstract: The present invention relates to fiber treatment compositions comprising an unsaturated acetate, an organohydrogensiloxane, a metal catalyst, and a dispersant selected from the group consisting of one or more surfactants and one or more solvents. The compositions of the present invention impart beneficial characteristics such as slickness, softness, compression resistance and water repellency to substrates such as fibers and fabrics.Type: GrantFiled: January 29, 1996Date of Patent: September 9, 1997Assignee: Dow Corning CorporationInventors: Jeffrey Alan Kosal, Anthony Revis
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Patent number: 5609957Abstract: Regenerated cellulosic fibers are delustered by the incorporation therein of hollow beads, suitably spherical beads of a diameter between 1.5 and 0.25 microns which have water permeable walls.Type: GrantFiled: August 28, 1995Date of Patent: March 11, 1997Assignee: Courtaulds plcInventors: Stuart Page, Paul L. Probert
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Patent number: 5593779Abstract: A fiber for clothing, the fiber having a layer of crosslinked enzyme protein on a surface of a single fiber or a monofilament thereof; and a method for producing the fiber for clothing having the steps of immersing a fiber into a solution containing an enzyme protein to adsorb the enzyme protein onto a surface of a single fiber or a monofilament thereof, and crosslinking the enzyme protein adsorbed on the surface of the single fiber or the monofilament with a crosslinking agent.Type: GrantFiled: June 7, 1995Date of Patent: January 14, 1997Assignee: Kao CorporationInventors: Kazuo Mori, Kazunori Nishizawa, Yoshifumi Niki
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Patent number: 5585181Abstract: The present invention provides a composition having a base of cellulose formate capable of producing fibers or films, containing as a solvent one or more compounds selected from the group consisting of alkylsulfoxides, lactams, acyclic amides and cyclic derivatives of urea. The invention further provides a process for obtaining these fibers and films, and a regenerated cellulose fiber having a degree of substitution by formate groups of less than 3%. The fiber is useful for textile applications or in order to reinforce tires.Type: GrantFiled: June 6, 1995Date of Patent: December 17, 1996Assignee: Michelin Recherche et Technique S.A.Inventors: Jean-Paul Meraldi, Vlastimil Cizek, Rima Huston
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Patent number: 5580922Abstract: The invention is directed to a composition of matter useful as a paper impregnant, to the method of its use, and to the products produced by the method. Poly (diphenylmethane diisocyanate) or PMDI has been used in the past as a paper impregnant with or without propylene carbonate as a diluent. These products have generally required pressing under high pressures and at elevated temperatures. It has now been found that triacetin and/or triethyl citrate in usages up to about 20% of PMDI give superior performance in impregnated products. The modified PMDI will cure at essentially ambient conditions in times as short as 1-2 days to insoluble polyureas with low residual amounts of isocyanates and reaction byproducts such as 4,4'-diaminodiphenylmethane. The treated papers can be used in applications of which skins for sandwich panels and high strength corrugated board would be exemplary.Type: GrantFiled: June 6, 1995Date of Patent: December 3, 1996Assignee: Weyerhaeuser CompanyInventors: David W. Park, Frank R. Hunter
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Patent number: 5571618Abstract: Particles, such as superabsorbent particles, are bound to fibers, such as cellulosic fibers, by a binder that has a volatility less than water. The binder has a functional group capable of forming a hydrogen bond with the fibers, and a functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with the particles. The binder is activated or reactivated by addition of heat, liquid, or mechanical energy. Therefore, fibers treated with binder may be shipped to a distribution point before particles are bound to the fibers. The binder may be a polymeric binder selected from the group consisting of polyethylene glycol, polypropylene glycol, poly (caprolactone) diol, polyacrylic acid, polyamides and polyamines. The polymeric binder has a hydrogen bonding functionality or coordinate covalent bond forming functionality on each repeating unit of the polymeric binder.Type: GrantFiled: June 17, 1994Date of Patent: November 5, 1996Assignee: Weyerhaeuser CompanyInventors: Michael R. Hansen, Richard H. Young, Sr.
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Patent number: 5571620Abstract: This invention relates to linear, water-dispersible sulfopolyesters that incorporate higher order polyalkylene glycol units. The sulfopolyesters provide improved abrasion and blocking resistances in polyester fiber sizing applications.Type: GrantFiled: November 27, 1995Date of Patent: November 5, 1996Assignee: Eastman Chemical CompanyInventors: Scott E. George, Edgar W. Lefler, IV, James M. Spain, Jr.
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Patent number: 5547745Abstract: The binder is applied to fibers to bind particles to the fibers. The fibers have hydrogen bonding functional groups. The particles have functional groups capable of forming a hydrogen bond or a coordinate covalent bond. The binder comprises binder molecules, wherein the binder molecules have at least one functional group that forms a hydrogen bond or a coordinate covalent bond with the particles, and at least one functional group that forms a hydrogen bond with the fibers. A substantial portion of the particles that may be adhered to the fibers are adhered in particulate form by hydrogen bonds or coordinate covalent bonds to the binder, and the binder in turn may be adhered to the fibers by hydrogen bonds. Fibers containing particles bound by this method are easily densified.Type: GrantFiled: August 17, 1993Date of Patent: August 20, 1996Assignee: Weyerhaeuser CompanyInventors: Michael R. Hansen, Richard H. Young, Sr.
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Patent number: 5543215Abstract: Particles are bound to fibrous material by a polymeric binder selected from the group consisting of poly(caprolactone) diol, polyamides and polyamines. The polymeric binder has a hydrogen bonding functionality or coordinate covalent bond forming functionality on each repeating unit of the polymeric binder. As a specific example, the fibrous material is cellulosic fibers and the particles are superabsorbent particles. Preferably 3-80 percent binder and 0.05-80 percent particles, by weight of the total weight of the fibrous material, binder and particles are included. The binder preferably has a molecular weight greater than 500 grams/mole, preferably 4,000-8,000 grams/mole. Particles attached to the fibers in this manner are firmly adhered and are not easily dislodged. Fibrous products produced by this method include fibers to which particles are bound, and fibers which have been treated with the binder but to which particles are not bound.Type: GrantFiled: August 17, 1992Date of Patent: August 6, 1996Assignee: Weyerhaeuser CompanyInventors: Michael R. Hansen, Richard H. Young, Sr.
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Patent number: 5516585Abstract: Discontinuous fibers are coated with a binder material with the binder material adhering the fibers to super absorbent particles. Fibers in the product are substantially unbonded except to the super absorbent particles. The binder may be present at an amount which is sufficient to substantially continuously coat the fibers. Plural coatings of various binder materials may be used. The binder material may be heat fusible or heat curable and the treated fibers mixed with other fibers for use in producing a wide variety of products.Type: GrantFiled: May 25, 1993Date of Patent: May 14, 1996Assignee: Weyerhaeuser CompanyInventors: Richard H. Young, Sr., Amar N. Neogi, Michael R. Hansen
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Patent number: 5506042Abstract: A flame-retarded bedding product comprising (A) 85 to 15 parts by weight of a fiber comprising a polymer containing 17 to 86% by weight of a halogen, and 6 to 50% by weight of an Sb compound based on the polymer, and (B) 15 to 85 parts by weight of at least one fiber selected from the group consisting of natural fibers and chemical fibers, the total amount of the fibers (A) and (B) being 100 parts by weight. The bedding product has not only the desired flame resistance but also excellent visual feeling, feeling of touchness, hygroscopic property, washing resistance, durability, and the like.Type: GrantFiled: July 19, 1994Date of Patent: April 9, 1996Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Keiji Ichibori, Takaharu Matsumoto, Youichi Kanbara
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Patent number: 5503916Abstract: Flame-retarded clothing comprising (A) 85 to 15 parts by weight of a fiber comprising a polymer containing 17 to 86 % by weight of a halogen, and 6 to 50 by weight of an Sb compound based on the polymer, and (B) 15 to 85 parts by weight of at least one fiber selected from the group consisting of natural fibers and chemical fibers, the total amount of the fibers (A) and (B) being 100 parts by weight. The clothing has not only the desired flame resistance but also excellent visual feeling, feeling of touchness, hygroscopic property, washing resistance, durability, and the like.Type: GrantFiled: July 19, 1994Date of Patent: April 2, 1996Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Keiji Ichibori, Takaharu Matsumoto, Youichi Kanbara
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Patent number: 5503915Abstract: A flame-retarded interior good comprising (A) 85 to 15 parts by weight of a fiber comprising a polymer containing 17 to 86% by weight of a halogen, and 6 to 50% by weight of an Sb compound based on the polymer, and (B) 15 to 85 parts by weight of at least one fiber selected from the group consisting of natural fibers and chemical fibers, the total amount of the fibers (A) and (B) being 100 parts by weight. The interior good has not only the desired flame resistance but also excellent visual feeling, feeling of touchness, hygroscopic property, washing resistance, durability, and the like.Type: GrantFiled: July 19, 1994Date of Patent: April 2, 1996Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Keiji Ichibori, Takaharu Matsumoto, Youichi Kanbara
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Patent number: 5498478Abstract: Polyethylene glycol is used as a binder material for fibers, such as wood pulp fibers, and for adhering superabsorbent particulate materials to the fibers.Type: GrantFiled: March 17, 1994Date of Patent: March 12, 1996Assignee: Weyerhaeuser CompanyInventors: Michael R. Hansen, David W. Park
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Patent number: 5494486Abstract: Mercerization wetting compositions comprising a compound of the formula ##STR1## where R.sub.1 is hydroxyl or --SO.sub.3 M,R.sub.2 is C.sub.4 -C.sub.18 alkyl,M is an alkali metal,n is 0 or 1, andm is from 2 to 6 are described. The mercerization wetting compositions of the invention are high-wetting and low-foaming. Moreover, the compounds are readily biodegradable.Type: GrantFiled: June 2, 1995Date of Patent: February 27, 1996Assignee: Ciba-Geigy CorporationInventors: Albert Stehlin, Thomas Maier
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Patent number: 5491024Abstract: The present invention is directed to a man-made fiber comprising a cellulose ester and 0.05 to 5.0% by weight of a titanium dioxide having an average particle size of less than 100 nanometers.Type: GrantFiled: March 14, 1995Date of Patent: February 13, 1996Assignee: Hoechst Celanese CorporationInventors: Terry A. Brodof, John B. Hopkins, Jr.
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Patent number: 5489469Abstract: A liquid-absorbent composite comprises (a) a water-absorbent polymer, (b) a water-insoluble inorganic material and (c) a water-insoluble hydrophilic fibrous material at a weight ratio between (a), (b) and (c) in the range of 100:5-1200:5-1200. It is very useful as the absorbent component for a sanitary napkin and a medical pad.Type: GrantFiled: May 28, 1993Date of Patent: February 6, 1996Assignee: Kao CorporationInventors: Takatoshi Kobayashi, Yukihiro Nakano, Zenbei Meiwa, Minoru Nakanishi, Tadashi Matsui
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Patent number: 5486418Abstract: By mixing a high-melting polyvinyl alcohol type polymer (A) and a low-melting water-soluble polymer (B) in a solvent for the polymer (A) to prepare a spinning solution and then subjecting the solution to low-temperature spinning so that the resulting filaments are solidified uniformly in the cross-sectional direction, there is formed a fiber of sea-islands structure comprising said high-melting polyvinyl alcohol type polymer (A) as the sea component and said low-melting water-soluble polymer (B) as the islands component. In this fiber, at least part of the islands component is present in a fiber zone ranging from the fiber surface to 2 .mu.m inside and the fiber surface contains substantially no islands component. This fiber ordinarily shows the performance of the matrix phase, i.e.Type: GrantFiled: October 13, 1994Date of Patent: January 23, 1996Assignee: Kuraray Co., Ltd.Inventors: Akio Ohmory, Tomoyuki Sano, Masahiro Satoh, Syunpei Naramura, Satoru Kobayashi, Yosuke Sekiya
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Patent number: 5482776Abstract: A viscose rayon fiber provided with a superior appearance such as a silk-like appearance by arranging a number of microfine stripes over all of the surface of the fiber, and a manufacturing method thereof. This fiber can be used as a fiber constituting a filament, and as a staple fiber.A viscose rayon filament provided with a superior appearance such as a uniform appearance without nonuniformity by forming each fiber of the filament with a cross sectional shape which is independently different from an irregular state in an axial direction of the filament, and a manufacturing method thereof. This application includes a viscose rayon filament including the features of the two above inventions and a manufacturing method. The viscose rayon fiber and the viscose rayon filament in accordance with the present invention can be broadly used for various applications as products having a superior appearance and quality.Type: GrantFiled: March 25, 1994Date of Patent: January 9, 1996Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Kazunari Nishiyama, Koichi Konomoto
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Patent number: 5468544Abstract: Composite materials formed from bone bioactive glass or ceramic fibers and structural fibers are disclosed. In preferred embodiments, a braid or mesh of interwoven bone bioactive glass or ceramic fibers and structural fibers is impregnated with a polymeric material to provide a composite of suitable biocompatibility and structural integrity. Most preferably, the mesh or braid is designed so that the bioactive fibers are concentrated at the surface of the implant to create a surface comprised of at least 30% bioactive material, thereby providing enhanced bone ingrowth. The interweaving between the bone bioactive glass or ceramic fibers and the core of structural fibers overcomes the problems found in prior composite systems where the bioactive material delaminates from the polymer. Preferred bioactive materials include calcium phosphate ceramics and preferred structural fibers include carbon fibers. Improved prosthetic implants and methods of affixing an implant are thus also disclosed.Type: GrantFiled: November 15, 1993Date of Patent: November 21, 1995Assignee: The Trustees of the University of PennsylvaniaInventors: Michele S. Marcolongo, Paul Ducheyne, Frank Ko, William LaCourse
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Patent number: 5462801Abstract: A filter tow from cellulose acetate filaments and/or staple fibers is described on the surface of which an additive from cellulose chain-splitting enzymes is present, at least the surface of the filaments and staple fibers consisting of a cellulose acetate having an acetyl number of less than 53%, preferably less than 49%. The method for the production of such a filter tow comprises spinning cellulose acetate filaments from a solution in acetone, of cellulose acetate of an acetyl number of at least 53% if necessary, cutting the filaments to staple fibers, gathering the filaments and/or staple fibers to a filter tow and applying an additive, the filaments and staple fibers being hydrolyzed and as additive one of cellulose chain-splitting enzymes is used. There are described also a tobacco smoke filter element from such a filter tow and a method for its production.Type: GrantFiled: July 21, 1993Date of Patent: October 31, 1995Assignee: Rhone-Poulenc Rhodia AktiengesellschaftInventor: Rolf Willmund
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Patent number: 5460882Abstract: A multifilament yarn of a thermoplastic polymer based on tetrafluoroethylene, having high mechanical strength and dimensional stability at high temperatures (200.degree.-250.degree. C.), is prepared by melt extrusion through a die characterized by a hole density comprised between 10 and 150 holes/cm.sup.2 and provided with a cooling system of the emerging yarn of high efficiency and uniformity. The multifilament yarn can be subsequently drawn to obtain a drawn multifilament yarn with even further improved tensile strength and modulus.Type: GrantFiled: October 27, 1993Date of Patent: October 24, 1995Assignee: Ausimont S.p.A.Inventors: Giandomenico Vita, Giuseppe Ajroldi, Mario Miani
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Patent number: 5458959Abstract: Aqueous polymer composition for application to synthetic polymeric materials to improve wettability of same by polymer matrices and bond strength therebetween, which includes a polymer containing vinyl groups, in at least one and preferably two fluorocarbon surfactants and water. The composition also optionally, and preferably includes a copolymerizable surfactant and ethoxy silicone. Synthetic polymeric materials treated with the aqueous polymer composition are disclosed primarily as reinforcing materials in structural composites, either alone or in conjunction with other reinforcing materials. Composites utilizing the pretreated reinforcing materials are also included.Type: GrantFiled: October 27, 1988Date of Patent: October 17, 1995Assignee: ABCO Industries, Inc.Inventors: James M. Self, Paul C. Fleischer
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Patent number: 5449555Abstract: There are described filaments on the basis of a cellulose acetate soluble in acetone, the degree of polymerization (DP) of the cellulose acetate being between about 110 and 210 and the degree of substitution (DS) preferably between about 2.2 and 2.7. Optically isotropic spinning solutions can be obtained, the cellulose acetate concentration of which is about 35 to 47 mass-%. When such an optically isotropic spinning solution is spun, in particular by dry spinning, filaments are obtained in a profitable manner because the costs connected with the recovery of the acetone can be appreciably lowered, without impairing the desirable properties of the filaments, which are suitable in particular for the production of cigarette filter tow.Type: GrantFiled: January 21, 1994Date of Patent: September 12, 1995Assignee: Rhone-Poulenc Rhodia AktiengesellschaftInventors: Ties Karstens, Wolfgang Koppe, Joachim Schatzle, Gunter Maurer
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Patent number: 5443899Abstract: Disclosed is a fiber comprising, chemically bonded together, (a) a conventional cellulosic fiber, such as a Kraft fiber or a chemithermomechanical pulp fiber; (b) poly(acrylate-co-itaconate) copolymer, such as the acid form of a poly(acrylate-co-itaconate) copolymer comprising 90-95 mole % acrylate and 5-10 mole % itaconate having weight average molecular weight of about 600,000-900,000; and (c) a polyol, such as polyethylene glycol; also disclosed are methods for making such fibers, especially evaporatively depositing an intimate mixture of the copolymer and polyol on the fiber followed by thermally crosslinking at specific temperatures for limited periods; absorbent paper which can be made by wet-laying the fiber, especially in admixture with conventional fiber; and derivative paper structures, such as multi-ply disposable absorbent towels.Type: GrantFiled: June 2, 1992Date of Patent: August 22, 1995Assignee: The Procter & Gamble CompanyInventors: Robert L. Barcus, David W. Bjorkquist
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Patent number: 5441801Abstract: A process for making a polyvinyl chloride and wood composite pellet by extrusion. The polyvinyl chloride and wood fiber are introduced into the extruder at a ratio of approximately 6:4 by weight, respectively. The polyvinyl chloride is melted and blended with the wood fiber so that the interstitial voids of the wood fiber are filled with polyvinyl chloride. After being extruded through a die, the molten material is cut into pellets having a bulk density of preferably between 0.7 to 0.8 gm/mm.sup.3.Type: GrantFiled: February 12, 1993Date of Patent: August 15, 1995Assignee: Andersen CorporationInventors: Michael J. Deaner, Giuseppe Puppin, Kurt E. Heikkila
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Patent number: 5434200Abstract: Compositions comprising a finely divided cellulosic material and an amount of a latex containing magnesium oxychloride and/or magnesium oxysulphate effective to impart water and fire resistance to the cellulosic material are disclosed. Methods to make a water and fire resistant product are also disclosed.Type: GrantFiled: October 28, 1993Date of Patent: July 18, 1995Assignee: Pyrotite CorporationInventors: William R. Kolker, Lars Bach
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Patent number: 5432000Abstract: A fiber product comprises dry discontinuous fibers having a starch binder on at least a portion of the fiber surfaces, at least about seventy percent of the starch binder coated fibers being unbonded to one another, solid particles are adhered to the fibers by the binder without the binder entirely coating the particles. The fibers may be air laid into a web or formed into an absorbent structure. Superabsorbent particles are a specific example of the particles which may be adhered to the fibers.Type: GrantFiled: March 22, 1991Date of Patent: July 11, 1995Assignee: Weyerhaeuser CompanyInventors: Richard H. Young, Sr., Amar N. Neogi, Michael R. Hansen, Kevin T. Hodgson, Donald D. Halabisky, David G. Marsh, Christel Brunnenkant, David W. Park, Paul G. Gaddis, William C. Johnston, Jr.
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Patent number: 5413676Abstract: A cellulosic fiber of improved wettability comprising cellulosic fibers with small discrete crystal domain of ionic salt attached to the surface of the fiber. The method of making the cellulosic fiber of improved wettability is also claimed.Type: GrantFiled: September 30, 1993Date of Patent: May 9, 1995Assignee: ChicopeeInventors: Hien V. Nguyen, Cecilia Vargas
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Patent number: 5401588Abstract: The novel composition of the present invention comprises a paper-like sheet material or a non-woven mat which contains water-insoluble gypsum anhydrite microfibers and a cellulosic binder, such as cellulose fibers, optionally with glass fibers, which has surprising fire-retardant properties. Typical paper processing methods or wet process mat techniques are utilized in preparing this material. The flexible gypsum microfiber sheet or mat of this invention may be used as microfiber insulation, particularly in a fire retardant barrier.Type: GrantFiled: December 21, 1993Date of Patent: March 28, 1995Assignee: Georgia-Pacific Resins Inc.Inventors: Chad E. Garvey, David A. Hutchings, Ted McC. McVay, Richard F. Pennock
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Patent number: 5385784Abstract: A deeply dyed polyester fabric exhibiting a lightness index L* value of 25 to 60. Fibers at least in the surface layer portion of either or both of the warps and wefts exhibit a light transmittance to an extent such that the difference .DELTA.X (%) between the light transmittance X.perp. (%) of polarized light vibrating perpendicular to the fiber axis at a wavelength of the maximum absorption and the light transmittance X .sup.[ (%) of polarized light vibrating parallel to the fiber axis at the same wavelength is not larger than 10%.Type: GrantFiled: March 7, 1994Date of Patent: January 31, 1995Assignee: Teijin LimitedInventors: Yoshiyuki Sasaki, Shigenobu Kobayashi, Katsuyuki Kasaoka, Tomio Matsubara, Kaoru Asada
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Patent number: 5376425Abstract: A contact member for controlling an electrostatic state of a surface of a chargeable member includes electrically conductive base members, and flame retardant material included in the base members.Type: GrantFiled: December 17, 1992Date of Patent: December 27, 1994Assignees: Minolta Camera Kabushiki Kaisha, Toeisangyo Co., Ltd.Inventors: Masaki Asano, Shuji Iino, Akihito Ikegawa, Izumi Osawa, Kenzo Tanaka
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Patent number: 5360671Abstract: A new class polyimide and polyimide precursors based on diaryl oxyalkylene diamines, such as 1,3-bis[4-aminophenoxy]-2,2-dimethyl propane, a process for their preparation and their use as the continuous phase for the manufacture of composites and composite laminates reinforced by reinforcing agents such as carbon fibers, Kevlar.TM., and other similar high strength reinforcing agents. The polyimides and molecular composites obtained from the diamines according to the invention show thermoplastic properties, excellent flex fatigue and fracture resistance, and excellent thermal and oxidative stability.Type: GrantFiled: January 27, 1993Date of Patent: November 1, 1994Assignee: The University of AkronInventor: Frank W. Harris
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Patent number: 5352480Abstract: Particles, such as superabsorbent particles, are bound to fibers, such as cellulosic fibers, by a binder that has a volatility less than water. The binder has a functional group capable of forming a hydrogen bond with the fibers, and a functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with the particles. The binder is activated or reactivated by addition of heat, liquid, or mechanical energy. Therefore, fibers treated with binder may be shipped to a distribution point before particles are bound to the fibers. The binder may be a polymeric binder selected from the group consisting of polyethylene glycol, polypropylene glycol, poly(caprolactone) diol, polyacrylic acid, polyamides and polyamines. The polymeric binder has a hydrogen bonding functionality or coordinate covalent bond forming functionality on each repeating unit of the polymeric binder.Type: GrantFiled: August 17, 1992Date of Patent: October 4, 1994Assignee: Weyerhaeuser CompanyInventors: Michael R. Hansen, Richard H. Young, Sr.
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Patent number: 5320903Abstract: The present invention is to provide a modified cellulose regenerated fiber having a practically endurable tenacity, and being excellent in dye-affinity, and having anti-funguses and deodorizing properties. The present invention comprises preliminarily molding chitosan or acetylated chitosan into a fine particle, mixing the fine particle body with cellulose viscose prior to spinning, and spinning the mixture, at the inclusion regenerated fiber.Type: GrantFiled: February 12, 1992Date of Patent: June 14, 1994Assignee: Fuji Spinning Co., Ltd.Inventors: Tsuguhisa Hirukawa, Hiroaki Tanibe, Tuguo Miyaji
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Patent number: 5316850Abstract: Permanently stain resistant nylon and cellulosic fibers, and a method to impart permanent stain resistance to polyamide or cellulosic fibers, by covalently binding a stain resistant composition to a linking compound that has been covalently attached to the fiber are disclosed. This invention represents a significant advance in the art of textile treatments in that the covalently linked stain resist treatment is not removed after a series of alkaline shampooings. This invention is particularly useful in the preparation of commercial grade carpets for heavy traffic areas that will not lose their stain resistance after frequent shampooing.Type: GrantFiled: April 12, 1991Date of Patent: May 31, 1994Assignee: Peach State Labs, Inc.Inventors: Ralph R. Sargent, Michael S. Williams
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Patent number: 5272005Abstract: Rayon/nylon and other sheath/core composite fibers or other materials, with good adhesion between sheath and core resulting from an adhesion promoter. The adhesion promoter is difunctional and sterically hindered. Fumaric acid and terephthalic acid are preferred adhesion promoters for the composite fibers or other materials, because each compound has both difunctionality and steric hinderance, allowing either to form covalent bonds to both the sheath and the core. Fibers produced in accordance with this invention may be used to produce fabrics which have the strength and wrinkle resistance shown by a number of synthetic fibers, but with the water absorption characteristics of natural fibers such as cotton.Type: GrantFiled: March 25, 1992Date of Patent: December 21, 1993Assignee: Board of Supervisors of Louisiana State University and Agricultural and Mechanical CollegeInventors: John R. Collier, Billie J. Collier
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Patent number: 5270121Abstract: Extended polymer compositions are provided which comprise polymers containing pendant functional groups of the formula: ##STR1## extended, i.e. admixed with a chalcogenide having the empirical formula ##STR2## wherein R.sub.1 is a divalent organic radical at least 3 atoms in length, X is organoacyl or cyano, A is a chalcogen, each of R.sub.9 and R.sub.10 is independently selected from hydrogen, NR.sub.11 R.sub.12, NR.sub.13 and monovalent organic radicals, at least one of R.sub.9 and R.sub.10 being NR.sub.11 R.sub.12 or NR.sub.13, each of R.sub.11 and R.sub.12 is independently selected from hydrogen and monovalent organic radicals, and R.sub.13 is a divalent organic radical. These compositions can be extended with significant proportions of the described chalcogenides with corresponding reductions in polymer concentration without significant loss of physical properties. The resulting combinations are particularly useful as binders and coatings.Type: GrantFiled: October 7, 1991Date of Patent: December 14, 1993Assignee: Rohm and Haas CompanyInventor: Charles L. Kissel
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Patent number: 5232779Abstract: The invention relates to reinforcing and/or process fibers based on plant fibers, obtainable thereby that plant fibers from which the wood components have been removed are treated with an aqueous solution of at least one metal compound selected among metal oxides, hydroxides, carbonates, sulfates, thiosulfates, sulfites, silicates or phosphates, subsequently washed and treated with an inorganic or organic binding agent or the fibers which have not been washed are neutralized with a mineral acid or that plant fibers from which the wood components have been removed are treated with an oxidation agent or that non-pretreated plant fibers are treated at 250.degree. to 350.degree. C. with the controlled addition of air so that carbonization of the fibers takes place.Type: GrantFiled: December 14, 1990Date of Patent: August 3, 1993Assignee: Ecco Gleittechnik GmbHInventor: Jean L. Spehner
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Patent number: RE35151Abstract: The present invention is to provide a modified cellulose regenerated fiber having a practically endurable tenacity, and being excellent in dye-affinity, and having anti-funguses and deodorizing properties. The present invention comprises preliminarily molding chitosan or acetylated chitosan into a fine particle, mixing the fine particle body with cellulose viscose prior to spinning, and spinning the mixture, at the inclusion regenerated fiber.Type: GrantFiled: February 1, 1995Date of Patent: January 30, 1996Assignee: Fuji Spinning Company, LimitedInventors: Tsuguhisa Hirukawa, Hiroaki Tanibe, Tuguo Miyaji