Flame Resistance Increased Patents (Class 427/393.3)
  • Patent number: 9790639
    Abstract: Method for sulphation and phosphorylation of a cellulose substrate for imparting anti-flame properties to the substrate in which at least one phosphonic acid of formula (I): PO(OH)2—R—PO(OH)2, ??(I) is used as a catalyst of sulphation and a phosphorylating agent and relative substrate.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: October 17, 2017
    Assignees: Torcitura Padana S.p.A., Zanolo S.p.A.
    Inventors: Alberto Tonani, Andrea Novello, Calogero Sirna, Simone Giannatempo
  • Patent number: 8974911
    Abstract: The invention relates to a process for applying a fire-protection coating to a substrate using a process comprising the steps of applying a first clearcoat layer to the substrate, applying an intumescent fire-protection layer to the first clearcoat layer, and applying a second clearcoat layer to the intumescent fire-protection layer.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: March 10, 2015
    Assignee: Lufthansa Technick AG
    Inventor: Mathias Nolte
  • Patent number: 8840967
    Abstract: The present invention relates to a method for manufacturing a printed circuit board including a flame retardant insulation layer. The printed circuit board of the present invention exhibits excellent thermal stability and excellent mechanical strength, is suitable for imprinting lithography process, provides improved reliability by reducing coefficient of thermal expansion, and has excellent adhesion between circuit patterns and an insulation layer.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: September 23, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae-Choon Cho, Myeong-Ho Hong, Hwa-Young Lee, Hee-Sun Chun, Choon-Keun Lee
  • Publication number: 20140045399
    Abstract: Embodiments of the present invention use melamine-based resins as a pretreatment on fabrics and fabric blends in combination with phosphorus-based flame retardants to improve flame retardant performance, durability, and further promote char formation in a combustion zone of the fabric.
    Type: Application
    Filed: October 15, 2013
    Publication date: February 13, 2014
    Applicant: MATCHMASTER DYEING & FINISHING, INC.
    Inventor: Malcolm H. Hensley
  • Patent number: 8617662
    Abstract: A method of producing textile blind slat, includes (a) weaving an elongated textile strip, wherein two longitudinal edge portions are double layered, for respectively forming elongated inner space therein; (b) immerging the elongated textile strip into a hardening agent, wherein the elongated textile strip passes through the hardening agent at a predetermined speed; (c) drying the elongated textile strip after the step (b) at a temperature between 100-180 Celsius degree; and (d) flattening the elongated textile strip after the step (c), so as to serve as a blind slat.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: December 31, 2013
    Assignee: Lande Braid Industry (Wenzhou) Co., Ltd.
    Inventor: Jianming Yu
  • Patent number: 8585813
    Abstract: Compositions useful for the flame retardant finishing of cotton articles or other cellulose materials are described. The compositions are obtainable by reacting a tetrakishydroxyalkylphosphonium (THP) salt with caprolactam and urea to form a condensation product and subsequently forming a condensate from excess THP salt and excess urea. The compositions endow cotton articles with flame retardant properties and a pleasantly soft hand coupled with good durability to laundering processes.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: November 19, 2013
    Assignee: Huntsman Textile Effects (Germany) GmbH
    Inventors: Salman Dermeik, Andreas Eisele, Waltraud Demharter
  • Patent number: 8455571
    Abstract: A flame-retardant particle includes: a particle containing a compound having a structure represented by formula (1); and a coating particle that covers at least a part of a surface of the particle: -A(—O—CO—O—Ar)m??(1) wherein A represents a substituted or unsubstituted aromatic group; Ar represents a substituted or unsubstituted phenyl group; and m represents an integer of 1 to 3.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: June 4, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masato Mikami, Masayuki Okoshi, Kazuya Yamanoi
  • Publication number: 20110275264
    Abstract: Provided is a flame resistant fabric comprising a fabric substrate comprising cellulosic fibers and thermoplastic fibers, and a finish applied to the fabric substrate comprising a tetrahydroxymethyl phosphonium salt or a condensate thereof, a cross-linking agent, a brominated compound, and optionally a melamine resin. Also provided are methods of preparing the flame resistant fabric.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 10, 2011
    Inventors: Daniel T. McBride, Warren W. Gerhardt, John L. Sanchez, Lei Zhang, Keith A. Keller, Jenny S. Kimbrell, Keenon Copeland
  • Patent number: 8021736
    Abstract: Substantially flame retardant-free carpets comprising poly(trimethylene terephthalate) yarn having minimal carrier and, optionally, minimal antistatic agent, are disclosed, as are methods for making such carpets.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: September 20, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jing C. Chang, Steven D. Beare, Gregory A. Urove, John J. Kozlowski
  • Patent number: 7923074
    Abstract: A method for preparing a vehicle interior material comprises the steps of feeding 100 parts by weight of phosphorus and nitrogen-containing non-halogen flame retardant particles and 0.1 to 20 parts by weight of hydrophobic inorganic oxide fine particles having hydrophobic groups and having an average particle size of 0.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: April 12, 2011
    Assignee: Nissin Chemical Industry Co., Ltd.
    Inventors: Harukazu Okuda, Ichiro Tanii, Norio Nakamura, Kazuyuki Matsumura, Akira Yamamoto, Toshiaki Ihara
  • Publication number: 20110073331
    Abstract: The present invention relates to the use of ionic liquids as flame retardants. The compounds of the invention may be used as flame retardants in various materials without causing damage to the environment and or health of humans or animals. Ionic liquid flame retardants maybe applied alone or in combination with traditional flame retardants. Ionic liquid flame retardants can be applied to finish textile, plastic, leather, paper, rubber or as wild fire flame retardants.
    Type: Application
    Filed: November 16, 2010
    Publication date: March 31, 2011
    Inventor: Yanjie Xu
  • Publication number: 20110009022
    Abstract: A fire retardant fabric or garment comprising: a fabric or garment and a fire retardant composition including a polyvinyl alcohol copolymer, a vinyl acetate copolymer an acrylic emulsion, and vinyl acrylic emulsion or a combination thereof.
    Type: Application
    Filed: April 15, 2010
    Publication date: January 13, 2011
    Inventors: Harrie P. Schoots, Dalia I. Eicken, Vinh V. Nguyen, Arnold Ybarra
  • Publication number: 20100295283
    Abstract: A base fabric for an air bag is provided which is light-weight, flexible, superior in stowability, air shieldability, heat resistance and flame retardancy, further superior in the adhesion to resin and difficult to undergo stitch dislocation and fray. The air bag base fabric comprises a synthetic fiber fabric at least one surface of which is coated with resin. The resin is present also over at least 85% of the total area of an intertwined portion interface as a warp-weft crossing portion of the synthetic fiber fabric.
    Type: Application
    Filed: August 23, 2007
    Publication date: November 25, 2010
    Applicant: SEIREN CO., LTD.
    Inventors: Tatsuro Yamada, Naokuni Iwasa, Akihiro Nogata
  • Publication number: 20100151759
    Abstract: The present invention is directed to a fabric composed of nylon or polyester fibers and having both liquid barrier properties and fire retardant properties without sacrificing many of the desirable properties of the fabric. In particular, the present invention helps overcome many of the disadvantages associated with prior art fabrics by providing a fabric having feel and drape of a textile fabric while having good fluid barrier characteristics and fire retardant characteristics. In one embodiment, the invention is also directed to a breathable nylon or polyester fabric having liquid barrier and fire retardant properties. The present invention also provides methods of making such fabrics.
    Type: Application
    Filed: December 29, 2009
    Publication date: June 17, 2010
    Inventor: David A. Capwell
  • Patent number: 7736696
    Abstract: A closed-loop system and process is used for applying fire retardant chemicals to substrates including fibers, yarns, fabrics or mixtures thereof. Substrates are preferably positioned in a vessel such as a dye machine which circulates the fire retardant chemicals. After absorption of the fire retardant composition, non-absorbed fire retardant chemicals are recovered and re-used on subsequent batches of fibers. The re-use of fire retardant chemicals can take place in the same vessel which is used to treat successive batches of substrates. Alternatively, recovery can be achieved by directing the non-absorbed fire retardant composition into a second dye machine containing additional fibers, or by extracting the fire retardant composition by centrifugation or other means, or by a combination of the two processes. The process is environmentally friendly, and allows for higher throughput on impregnating fibers with fire retardant chemicals.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: June 15, 2010
    Assignee: Tintoria Piana U.S., Inc.
    Inventors: Andrea Piana, James L. Gaston
  • Patent number: 7666802
    Abstract: The present invention is directed to a fabric composed of nylon or polyester fibers and having both liquid barrier properties and fire retardant properties without sacrificing many of the desirable properties of the fabric. In particular, the present invention helps overcome many of the disadvantages associated with prior art fabrics by providing a fabric having feel and drape of a textile fabric while having good fluid barrier characteristics and fire retardant characteristics. In one embodiment, the invention is also directed to a breathable nylon or polyester fabric having liquid barrier and fire retardant properties. The present invention also provides methods of making such fabrics.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: February 23, 2010
    Assignee: Brookwood Companies, Inc.
    Inventor: David A. Capwell
  • Publication number: 20100040792
    Abstract: Provided herein are specific coating compositions, which are used as a monolithic coating layer for airbags. Preferably, these coating compositions are comprised of urethanes, which are blended together, where at least one of the urethane components is inherently flame retardant and the other of which is a urethane with gas-retaining properties. The gas-retaining urethane may be characterized as having high tensile strength at break, high elongation at break, and a 100% modulus less than 2,000 p.s.i. The inherently flame retardant urethane is the result of a manufacturing process in which a halogenated diol is reacted with an isocyanate, resulting in the incorporation of halogens into the polyurethane backbone. The resulting coating compositions (that is, the blends of gas-retaining urethane and flame retardant urethane), when applied as a single layer to an airbag fabric, result in an airbag with good gas retention, flame retardance, anti-blocking properties, and aging stability.
    Type: Application
    Filed: October 20, 2009
    Publication date: February 18, 2010
    Inventors: Ramesh Keshavaraj, Kunquan Yu
  • Patent number: 7592067
    Abstract: Disclosed are epoxy resin compositions which include an alkali metal containing cure accelerator. The alkali metal containing cure accelerators are preferably alkali metal hydroxides, alkoxides, carboxylates, or alkali metal salts. Articles prepared from the resin compositions of the invention exhibit enhanced thermal properties, and similar non-thermal properties, when compared to articles prepared from compositions including other accelerators such as imidazoles. The resin compositions of the invention may be used for any purpose, but are particularly suited to be utilized in the manufacture of laminates for printed circuit boards and non-electrical structural applications.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: September 22, 2009
    Assignee: Hexion Specialty Chemicals, Inc.
    Inventors: Walter H. Christiansen, Larry S. Corley, Carlton E. Ash
  • Patent number: 7588802
    Abstract: The invention provides a flame-retardant processing agent capable of imparting durable flame retardance to polyester-based fiber products without using halogen-based flame retardant. The flame-retardant processing agent is obtained by dispersing at least one phosphoric acid amide selected from the group consisting of 1,4-piperazinediyl bis(diarylphosphate), diaryl aminophosphate and aryl diaminophosphate as a flame retardant in a solvent in the presence of a nonionic surfactant or an anionic surfactant.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: September 15, 2009
    Assignee: Daikyo Chemical Co., Ltd.
    Inventors: Terufumi Iwaki, Katsuo Sasa, Takeshi Masuda
  • Patent number: 7575783
    Abstract: A high performance flame retardant textile fabric is provided which is suitable for use in producing close-fitting garments, such as undergarments, that come into direct contact with the skin of the wearer and provide a protective function, as well as in non-apparel applications. The fabric is formed of yarns of rayon continuous filaments, the yarns having outer filaments along the periphery of the yarn and inner filaments in the interior of the yarn. A cured phosphorus-based flame retardant compound is durably affixed to the filaments and imparts flame retardant properties to the fabric. The outer filaments of the yarns have a phosphorus content at least 25% greater than the inner filaments of the yarn.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: August 18, 2009
    Assignee: SSM Industries, Inc.
    Inventors: Scott N. Hilleary, Greg Watson
  • Publication number: 20090181588
    Abstract: The present invention is directed to a fabric composed of nylon or polyester fibers and having both liquid barrier properties and fire retardant properties without sacrificing many of the desirable properties of the fabric. In particular, the present invention helps overcome many of the disadvantages associated with prior art fabrics by providing a fabric having feel and drape of a textile fabric while having good fluid barrier characteristics and fire retardant characteristics. In one embodiment, the invention is also directed to a breathable nylon or polyester fabric having liquid barrier and fire retardant properties. The present invention also provides methods of making such fabrics.
    Type: Application
    Filed: January 14, 2009
    Publication date: July 16, 2009
    Inventor: David A. Capwell
  • Publication number: 20090110919
    Abstract: A method is described for reducing the afterflame of a flammable, meltable material. A textile composite is described comprising an outer textile comprising a flammable, meltable material, and a heat reactive material comprising a polymer resin-expandable graphite mixture.
    Type: Application
    Filed: October 24, 2007
    Publication date: April 30, 2009
    Inventor: Dattatreya Panse
  • Patent number: 7425352
    Abstract: The invention provides a flame-retardant processing agent capable of imparting durable flame retardance to polyester-based fiber products without using halogen-based flame retardant. The flame-retardant processing agent is obtained by dispersing at least one phosphoric acid amide selected from the group consisting of 1,4-piperazinediyl bis(diarylphosphate), diaryl aminophosphate and aryl diaminophosphate as a flame retardant in a solvent in the presence of a nonionic surfactant or an anionic surfactant.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 16, 2008
    Assignee: Daikyo Chemical Co., Ltd.
    Inventors: Terufumi Iwaki, Katsuo Sasa, Takeshi Masuda
  • Publication number: 20070287022
    Abstract: An electrical component includes a conductive substrate, a tin layer formed on the substrate, and a coating of a foam formed on the tin layer to impede tin whisker growth, the coating comprising a foam having voids dispersed therethrough. A method for impeding tin whisker growth from a tin plating or finish formed over an electrical component includes covering the tin plating or finish with a coating of intumescent paint, and thereafter expanding the intumescent paint into a foam having voids dispersed therethrough.
    Type: Application
    Filed: July 25, 2006
    Publication date: December 13, 2007
    Inventors: Merrill M. Jackson, David Humphrey
  • Publication number: 20070275617
    Abstract: A method of making a decorative flame barrier surface covering in which a first material as a base layer is obtained. A stiffening solution is applied to the base layer, and a flame barrier coating is applied to the stiffened base layer. A second material having a decorative design thereon is obtained as a decorative layer. A functional finish is optionally applied on the decorative layer. The base layer is combined with the decorative layer to form the decorative flame barrier surface covering of the present invention. The decorative flame barrier surface covering of the present invention achieves a Class A certification under American Society for Testing and Materials standard E84-04 without an inherently flame-resistant material as the first or second material.
    Type: Application
    Filed: May 25, 2006
    Publication date: November 29, 2007
    Applicant: WP IP, LLC
    Inventors: Billy Evans Harris, Michael Preston Hinson, Robert Rhodes Lanier
  • Patent number: 7211293
    Abstract: A closed-loop system and process is used for applying fire retardant chemicals to fibers. Fibers are preferably positioned in a vessel such as a dye machine which circulates the fire retardant chemicals. After absorption of the fire retardant composition, non-absorbed fire retardant chemicals are recovered and re-used on subsequent batches of fibers. Recovery can be achieved by directing the non-absorbed fire retardant composition into a second dye machine containing additional fibers, or by extracting the fire retardant composition by centrifugation or other means, or by a combination of the two processes. The process is environmentally friendly, and allows for higher throughput on impregnating fibers with fire retardant chemicals.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: May 1, 2007
    Assignees: Gaston International, Inc., Tintoria Piana U.S., Inc.
    Inventors: Andrea Piana, James L. Gaston
  • Patent number: 7060155
    Abstract: The invention relates to an insulation product comprising an elongated fibrous batt with a polymeric encapsulating layer and, optionally, a vapor or other barrier layer on one or more surfaces of the fibrous batt and an apparatus for manufacturing such an insulation product.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: June 13, 2006
    Assignee: Owens Corning Fiberglas Technology, Inc.
    Inventors: Daojie Dong, Liang Chen, Michael T. Pellegrin, Clarke Berdan, II, Randall M. Haines
  • Patent number: 7011724
    Abstract: A textile product with enhanced flame and/or smoke retardant properties and a method of forming the same is disclosed. The textile product is comprised of a textile material having a primary layer or backing with intumescent particles coated, sprayed, sprinkled, or otherwise applied to the upper surface thereof. Additionally or alternatively, the particles may be incorporated into the tufting primary or backing. The intumescent particles may also be complexed with additional agents, such as antimicrobial agents, softening agents, pliability agent, stain resistant agents, waterproofing agents, static resistance agents and combinations thereof.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: March 14, 2006
    Assignee: Interface, Inc.
    Inventors: Connie D. Hensler, Raymond A. Berard
  • Patent number: 6881247
    Abstract: The invention is directed to a protective barrier coating composition including a metal borate compound, a zinc compound, magnesium hydroxide, and a water based binder. The invention is also directed to a method of protecting building construction materials from termites and other insects, mold or mildew, and fire or water damage. The composition can be applied onto construction materials by a paint roller, spraying, or brushing, before, during, or after construction.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: April 19, 2005
    Inventor: Vernon Harland Batdorf
  • Publication number: 20040170768
    Abstract: The present invention provides for a method of protecting a surface from the effects of a fire by coating the surface with at least about a 2 mm coating of a polysiloxane composition containing a fire retardant filler which provides for excellent exterior durability as well as resistance to heat and fire. In preferred embodiments of the invention the fire retardant filler is melamine and the polysiloxane composition is a one part room temperature vulcanizable composition which cures through exposure to moisture.
    Type: Application
    Filed: February 28, 2003
    Publication date: September 2, 2004
    Inventors: Farooq Ahmed, Faisal Huda, Seraj ul Huda, John Barr
  • Publication number: 20040121114
    Abstract: The present invention relates to “closed loop” processes, systems and compositions for providing one or more flame retardant properties to, or for enhancing one or more flame retardant properties of, substrates containing at least about 5 weight percent of non-thermoplastic material, such as non-thermoplastic filaments, microfibers, fibers, fibrous compositions, threads, yarns, fabrics, textiles, materials, items of apparel, paper, tissue and/or blends, or to one or more products produced using any of the foregoing materials, and to substrates treated in accordance with the processes, systems and/or compositions of the invention.
    Type: Application
    Filed: November 26, 2003
    Publication date: June 24, 2004
    Applicant: NeWorld Fibers, LLC
    Inventors: Andrea Piana, James L. Gaston
  • Patent number: 6673266
    Abstract: A cellulose-based fire retardant composition is made by (1) adding cellulose to water, thereby forming a solution; (2) adding liquid ammonia to the solution; and (3) subsequently adding solid diammonium phosphate to the solution, thereby forming a viscous cellulose-based fire retardant liquid.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: January 6, 2004
    Assignee: NiPoNi, LLC
    Inventor: William H. Jones
  • Patent number: 6641749
    Abstract: A method for manufacturing a tire retardant cellulose insulation with reduced density and reduced settling. The method consists of adding a material, the fibers of which have a positive electrostatic charge, onto a shredded newspaper base either before or after the addition of a pre-coat, consisting of a mixture of limestone and an antistat. A fire retardant agent is then added and the materials are ground in a finish mill. The newspaper fibers become positioned at an angle to the paper pieces, increasing the distance between the paper pieces, thereby lowering the density of the cellulose. Fibers such as ground cardboard, wood mulch, sawdust, and fiberglass fibers are examples of materials with electrostatically positively charged fibers.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: November 4, 2003
    Inventor: Leonard D. Rood
  • Patent number: 6541068
    Abstract: A process is proposed for the fireproofing treatment of textile materials by impregnating them initially with a melamine-formaldehyde resin or organosilicon substances, and then with a solution of a complex compound of the ammonia salt of amidoalkylphosphonic acid with ammonium chloride. Materials treated in accordance with the invention have reduced combustibility and low toxicity of the gases given off during combustion.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: April 1, 2003
    Assignee: Isle Firestop Limited
    Inventors: Leonid Semenovich Galbraikh, Nina Sergeevna Zubkova, Nataliya Grigorievna Butylkina, Alexandr Alexandrovich Berlin, Nikolai Alexandrovich Khalturinsky
  • Patent number: 6495210
    Abstract: A method for preparing flame retardant mesh sheets and multi-filament fibers which do not do not generate halogen gas at the time of combustion. Also, a method for preparing mesh sheet and multi-filament fibers coated with a flame retardant including 1.5 to 15 wt % of red phosphorus and 10 to 70 parts by weight of an ammonium polyphosphate compound based on 100 parts by weight of the solid content of an aqueous solution of a polyolefin resin having a resin solid content of 20 to 45 wt%.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: December 17, 2002
    Assignee: Kyowa Kabushikikaisha
    Inventors: Saiji Nozaki, Kuniaki Kamiya
  • Publication number: 20020168476
    Abstract: Improved fire retardants that include guanylurea phosphate [(H2N—C(NH)—NH—C(O)—NH2).H3PO4] (GUP) and boric acid, materials such as wood and composite wood products that include these fire retardants, and methods of making and using same.
    Type: Application
    Filed: November 8, 2001
    Publication date: November 14, 2002
    Inventors: Eugene A. Pasek, Susan M. Thomas
  • Publication number: 20020110696
    Abstract: Wood products, specifically wood commonly used in construction including dimension lumber, pressure treated pine, composite wood materials such as plywood, particle board, and wafer board, and samples of paper and fabric were variously treated with concentrations of sodium silicate (Na2O.SiO2) also known as water glass. Cellulosic materials including dimension lumber, plywood, particle board, wafer board, paper, and fabric were treated with sodium silicate (Na2O.SiO2) in concentrations ranging from 400-0.04 g Na2O.SiO2/kg water. To overcome the disadvantages of sodium silicate, sodium silicate treated samples were further treated to convert the water soluble sodium silicate to a water insoluble form, thereby overcoming the disadvantages of water solubility. and rendering the material effective for internal and external uses.
    Type: Application
    Filed: August 10, 2001
    Publication date: August 15, 2002
    Inventors: K. M. Slimak, Robert A. Slimak
  • Patent number: 6383957
    Abstract: A process for preparing mesh sheets which do not generate halogen gas at the time of combustion using a flame retardant for mesh sheets comprising 1.5 to 15 wt % of red phosphorus and 10 to 70 parts by weight of an ammonium polyphosphate compound based on 100 parts by weight of the solid content of an aqueous solution of a polyolefin resin having a resin solid content of 20 to 45 wt %.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: May 7, 2002
    Assignee: Kyowa Kabushiki Kaisha
    Inventors: Saiji Nozaki, Kuniaki Kamiya
  • Patent number: RE44108
    Abstract: A high performance flame retardant textile fabric is provided which is suitable for use in producing close-fitting garments, such as undergarments, that come into direct contact with the skin of the wearer and provide a protective function, as well as in non-apparel applications. The fabric is formed of yarns of rayon continuous filaments, the yarns having outer filaments along the periphery of the yarn and inner filaments in the interior of the yarn. A cured phosphorus-based flame retardant compound is durably affixed to the filaments and imparts flame retardant properties to the fabric. The outer filaments of the yarns have a phosphorus content at least 25% greater than the inner filaments of the yarn.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: March 26, 2013
    Assignee: SSM Industries, Inc.
    Inventors: Scott Hilleary, Greg Watson