Mineral Fibers (e.g., Slag Wool, Rock Wool, Mineral Wool, Etc.) Patents (Class 501/36)
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Patent number: 7468337Abstract: A temperature resistant vitreous inorganic fiber having a use temperature of up to at least 1000° C., or greater, having after service mechanical integrity, is non-durable (soluble) in physiological fluids, and is produced from a melt containing silica, magnesia, a lanthanide series element-containing compound, and optionally zirconia.Type: GrantFiled: June 25, 2004Date of Patent: December 23, 2008Assignee: Unifrax I LLCInventors: Bruce K. Zoitos, Michael J. Andrejcak, Paul M. Boymel
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Patent number: 7449419Abstract: Embodiments of the present invention relate generally to fiberizable glass compositions comprising boron oxide at least one rare earth oxide in a molar ratio of rare earth oxide to boron oxide ranging from 0.01 to 0.33. Other embodiments of the present invention relate to methods of inhibiting boron volatization from glass compositions comprising boron oxide by adding a rare earth oxide to the glass composition before melting the glass compositions. Still other embodiments of the present invention relate to glass fibers formed from the fiberizable glass compositions of the present invention, and polymeric composites and printed circuit boards made therefrom.Type: GrantFiled: August 20, 2004Date of Patent: November 11, 2008Assignee: PPG Industries Ohio, Inc.Inventor: Hong Li
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Publication number: 20080191179Abstract: The invention relates to thermally-stable mineral wool which can dissolve in a physiological medium, comprising fibres containing the following constituents, expressed in percentage by weight, namely: 35-60 % SiO2, preferably 39-55 %; 12-27% Al2O3, preferably 16-25%; 0-35% CaO, preferably 3-25%; 0-30% MgO, preferably 0-15%; 0-17% Na2O, preferably 6-12%; 0-17% K2O, preferably 3-12%; 10-17% R2O (Na2O+K2O), preferably 12-17%; 0-5% P2O5, preferably 0-2%; 0-20% Fe2O3; 0-8% B2O3, preferably 0-4%; and 0-3% TiO2, and at least one phosphorous compound that can react with said fibres at a temperature of less than 1000° C. in order to form a coating on the surface thereof. The invention is characterised in that the phosphorous content of said compound, as expressed in phosphorus atom weight, varies between 0.0005%, in particular more than 0.01%, and 1%, in particular less than 0.5%, of the total weight of the fibres.Type: ApplicationFiled: March 31, 2006Publication date: August 14, 2008Applicant: SAINT-GOBAIN ISOVERInventors: Jean-Luc Bernard, Jerome Douce
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Publication number: 20080182317Abstract: The invention relates to glass fibres having a chemical composition that contains the following constituents in the limits defined hereafter and expressed in percentage by weight, namely: 38 to 49 SiO2; 15 to 25 Al2O3; 1 to 15 CaO; 0 to 4 MgO; 14 to 25 Na2O; 0 to 10 K2O; 0 to 8 B2O3; 0 to 3 Fe2O3; and 0 to 3 P2O5.Type: ApplicationFiled: March 31, 2006Publication date: July 31, 2008Applicant: SAINT-GOBAIN ISOVERInventors: Bertrand Maquin, Jerome Lalande, Yannick Lefrere
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Publication number: 20070287624Abstract: The invention relates to an improved method for preparing glass products, particularly continuous glass filaments. In this invention, the raw materials are treated with an alkaline solution to pre-react the raw material to remove unwanted materials from the raw materials. The alkaline solution can be added to the raw material mixture or can be generated in situ by the addition of water to the raw material mixture.Type: ApplicationFiled: June 13, 2006Publication date: December 13, 2007Inventor: Jon Frederick Bauer
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Publication number: 20070225145Abstract: The invention is an improved method for manufacturing fiberglass. In the method of the invention, traditional raw materials are at least partially replaced by pre-reacted materials. Use of these pre-reacted material results is less energy based to manufacture glasses and better melting of the raw material.Type: ApplicationFiled: June 13, 2006Publication date: September 27, 2007Inventors: Jon Frederick Bauer, Robert David Hamilton, Susan McMillin Gee
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Patent number: 7259118Abstract: A method for insulating an article requiring resistance against repeated exposure to temperatures exceeding 900° C. uses saline soluble, non-metallic, amorphous, inorganic oxide, refractory fibrous materials as thermal insulation. The compositions that can be used for that purpose include vitreous fibers based on SiO2, CaO, MgO, and optionally, A2O3.Type: GrantFiled: April 28, 2004Date of Patent: August 21, 2007Assignee: The Morgan Crucible Company PLCInventors: Gary Anthony Jubb, Jean-Louis Martin
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Patent number: 7211318Abstract: Disclosed is an incombustible composition for a fire door/wall, the fire door/wall using the incombustible composition, and a method of producing the fire door/wall. The incombustible composition includes 1 to 80 wt % of organic or inorganic fiber, 1 to 80 wt % of fly ash or bottom ash, 1 to 80 wt % of fire-proofing agent, 1 to 30 wt % of curing fire-retardant resin, and 1 to 40 wt % of incombustible hollow filler.Type: GrantFiled: September 28, 2004Date of Patent: May 1, 2007Inventors: Sang-Hoon Lee, Jun-Han Choi, Byung-Ick Yoon
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Patent number: 7189671Abstract: Improved glass fibers compositions, typically useful for fire resistant blankets or containers to provide high burn-through resistance at high temperatures of 2,400° F. and higher, and typically comprising silica, sodium oxide, potassium oxide, calcium oxide, magnesium oxide, ferrous+ferric oxide, and titanium oxide; the improved glass compositions may further include alumina, lithium oxide, and boron oxide.Type: GrantFiled: October 27, 2005Date of Patent: March 13, 2007Assignee: Glass IncorporatedInventor: Albert Lewis
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Patent number: 7153796Abstract: Thermal insulation is provided for use in applications requiring continuous resistance to temperatures of 1260° C. without reaction with alumino-silicate firebricks, the insulation comprises fibers having a composition in wt % 65%<SiO2<86% MgO<10% 14%<CaO<28% Al2O3<2% ZrO2<3% B2O3<5% P2O5<5% 72%<SiO2+ZrO2+B2O3+5*P2O5 95%<SiO2+CaO+MgO+Al2O3+ZrO2+B2O3+P2O5 Addition of elements selected from the group Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or mixtures thereof improves fiber quality and the strength of blankets made from the fibers.Type: GrantFiled: January 19, 2005Date of Patent: December 26, 2006Assignee: The Morgan Crucible Company plcInventors: Gary Anthony Jubb, Craig John Freeman
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Patent number: 7153799Abstract: Mathematical relationship for ingredients for fiber glass compositions are used to identify properties of the glass. In particular the forming temperature and delta T. In one embodiment, the mathematical relationship of the ingredients is of a generic quaternary SiO2, CaO, Al2O3 and MgO glass system. The relationship of SiO2, CaO, Al2O3 and MgO of interest include RO=CaO+MgO, SiO2/CaO, SiO2/RO, SiO2/Al2O3; Al2O3/CaO; SiO2+Al2O3; SiO2—RO and Al2O3/RO or RO/Al2O3 when other ingredients or components are added to the glass batch materials to alter the forming and/or liquidus temperatures of the glass, for example Na2O, Li2O, K2O and B2O3 the following mathematical relationships are of interest, (SiO2+Al2O3)/(R2O+RO+B2O3) where RO is as previously defined and R2O=Na2O+Li2O+K2O. Each of the compositional features of the glass identified above reflects the relative balance between the fluidity (i.e. viscosity) of the glass melt and its crystallization potential.Type: GrantFiled: December 17, 2004Date of Patent: December 26, 2006Assignee: PPG Industries Ohio, Inc.Inventor: Frederick T. Wallenberger
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Patent number: 7144836Abstract: Mathematical relationship for ingredients for fiber glass compositions are used to identify properties of the glass. In particular the forming temperature and delta T. In one embodiment, the mathematical relationship of the ingredients is of a generic quaternary SiO2, CaO, Al2O3 and MgO glass system. The relationship of SiO2, CaO, Al2O3 and MgO of interest include RO=CaO+MgO, SiO2/CaO, SiO2/RO, SiO2/Al2O3; Al2O3/CaO; SiO2+Al2O3; SiO2—RO and Al2O3/RO or RO/Al2O3 when other ingredients or components are added to the glass batch materials to alter the forming and/or liquidus temperatures of the glass, for example Na2O, Li2O, K2O and B2O3 the following mathematical relationships are of interest, (SiO2+Al2O3)/(R2O+RO+B2O3) where RO is as previously defined and R2O=Na2O+Li2O+K2O. Each of the compositional features of the glass identified above reflects the relative balance between the fluidity (i.e. viscosity) of the glass melt and its crystallization potential.Type: GrantFiled: December 17, 2004Date of Patent: December 5, 2006Assignee: PPG Industries Ohio, Inc.Inventor: Frederick T. Wallenberger
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Patent number: 7073353Abstract: The invention relates to a method for producing mineral wool, whereby a cracking catalyst having an aluminum oxide content of at least 35% by weight is used as a base material or aggregate. Said catalyst materials produce waste products which are difficult to eliminate in the chemical industry and which can be reused in the production of mineral fibers and can be used in an economical and resource sparing manner.Type: GrantFiled: September 26, 2003Date of Patent: July 11, 2006Inventor: Hans Peter Noack
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Patent number: 7022634Abstract: Provided is a glass composition useful in preparing fiberglass, with the composition comprising SiO2 in an amount ranging from 52-62 weight percent: B2O3 in an amount ranging from 3.5-5.5 weight percent; CaO in an amount ranging from 18-25 weight percent; MgO in an amount ranging from 0.5-4 weight percent; Al2O3 in an amount ranging from 10-15 weight percent; and Na2O in an amount ranging from 0.25-2 weight percent. The glass composition has an HTV of no greater than 2300° F. and a liquidus temperature at least 150 ° F. less than the HTV temperature. The composition allows one to realize costs savings associated with lower batch costs and abatement requirements, without significantly increasing the energy required for melting the glass, reducing fiberization efficiency, or requiring the development of new bushing technology.Type: GrantFiled: July 7, 2003Date of Patent: April 4, 2006Assignee: Johns ManvilleInventors: James Patrick Hamilton, Harry Hand Russell, III
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Patent number: 6998361Abstract: Improved glass compositions for glass fibers typically useful for fire resistant blankets or containers to provide high burn-through resistance at temperatures of 2,300° F. and typically comprising 10.23% to 81.81% silica, 2.0% to 26.00% alumina, 3.0% to 15.0% calcium oxide, 0% to 10.50% magnesium oxide, 1.0% to 18.0% ferrous+ferric oxide, and 0% to 4.0% titanium dioxide; the improved glass compositions may include 0% to 9% lithium oxide, 0% to 9% boron oxide, 0% to 6.0% manganese oxide, and 0% to 4.0% phosphorous oxide.Type: GrantFiled: September 19, 2003Date of Patent: February 14, 2006Assignee: Glass IncorporatedInventor: Albert Lewis
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Patent number: 6987076Abstract: A composite material comprises inorganic-bonded alkaline earth silicate fibers in which any bonding agents or fillers comprise low amounts of aluminum so that the composite material comprises less than 1% by weight aluminum expressed as Al2—O3.Type: GrantFiled: September 14, 1999Date of Patent: January 17, 2006Assignee: The Morgan Crucible Company plcInventors: Gary Anthony Jubb, Jean-Louis Martin, Jane Miller, Arlette Wotovic, Lindsay John Harold Todd
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Patent number: 6962886Abstract: Mathematical relationship for ingredients for fiber glass compositions are used to identify properties of the glass. In particular the forming temperature and delta T. In one embodiment, the mathematical relationship of the ingredients is of a generic quaternary SiO2, CaO, Al2O3 and MgO glass system. The relationship of SiO2, CaO, Al2O3 and MgO of interest include RO=CaO+MgO, SiO2/CaO, SiO2/RO, SiO2/Al2O3; Al2O3/CaO; SiO2+Al2O3; SiO2?RO and Al2O3/RO or RO/Al2O3. when other ingredients or components are added to the glass batch materials to alter the forming and/or liquidus temperatures of the glass, for example Na2O, Li2O, K2O and B2O3 the following mathematical relationships are of interest, (SiO2+Al2O3)/(R2O+RO+B2O3) where RO is as previously defined and R2O=Na2O+Li2O+K2O. Each of the compositional features of the glass identified above reflects the relative balance between the fluidity (i.e. viscosity) of the glass melt and its crystallization potential.Type: GrantFiled: June 6, 2002Date of Patent: November 8, 2005Assignee: PPG Industries Ohio, Inc.Inventor: Frederick T. Wallenberger
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Patent number: 6949483Abstract: Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400° C. Novel fibers contain at least 18% Al2O3. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibers may be selected by determining solubility at pH 4.5 or in macrophage.Type: GrantFiled: December 24, 2001Date of Patent: September 27, 2005Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 6897173Abstract: Mineral wool capable of dissolving in a physiological medium, and which comprises fibers whose constituents are mentioned below in the following percentages by weight: SiO2 35-60%,? preferably 39-55%? Al2O3 12-27%,? ? 16-25%? CaO 0-35%, ? 3-25% MgO 0-30%, ? 0-15% Na2O 0-17%, ? 6-12% K2O 0-17%, ? 3-12% R2O (Na2O + K2O) 10-17%,? ? 12-17%? P2O5 0-5%,? ? 0-2%? Fe2O3 0-20%, B2O3 0-8%,? ? 0-4%? TiO2 0-3%,? and also comprises a phosphorus compound, the phosphorus content of which, expressed in P2O5 form, varies from 0.2%, especially from more than 0.5%, to 5%, especially to less than 2%, of the total mass of fibers, which is capable of reacting above 100° C. with the fibers to form a coating on the surface of the fibers.Type: GrantFiled: March 16, 2001Date of Patent: May 24, 2005Assignee: Saint-Gobain IsoverInventors: Jean-Luc Bernard, Serge Vignesoult, Patrice Lehuede
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Patent number: 6861381Abstract: A fibre is disclosed having a maximum use temperature of 1200° C. or more which comprises: SiO2>64.25 wt % CaO>18 wt % MgO<17 wt % and in which the amount of MgO in mol % is greater than the amount of CaO in mol %. Such fibers have high solubility and low dustiness.Type: GrantFiled: August 24, 2000Date of Patent: March 1, 2005Assignee: The Morgan Crucible Company PLCInventors: Gary Anthony Jubb, Jean-Louis Martin
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Patent number: 6852656Abstract: The invention relates to a biologically-degradable glass fiber composition having good mechanical properties, good workability and in particular fiber-forming-capabilty features and resistance to humidity. The concentrations expressed in percent by weight for each component being the object of the invention are: SiO2: 61 to 66; Al2O3: 1.1 to 2.1; (CaO+MgO): higher than 9; (Na2O+K2O): higher than 18; B2O3: 4 to 15; P2O5: 0 to 5; SO3: 0 to 1; Fe2O3: 0 to 0.5; Others: less than 2.Type: GrantFiled: September 27, 2000Date of Patent: February 8, 2005Assignee: Techint Compagnia Tecnica Internazionale S.p.A.Inventors: Marco La Greca, Roberto Massini, Jorge Pasalaigua Huguet
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Patent number: 6846761Abstract: Low-dielectric-constant glass fibers having a glass composition comprising, by weight %, 50 to 60% of SiO2, 10 to 18% of Al2O3, 14% to less than 20% of B2O3, 1% to less than 6% of MgO, 2 to 5% of CaO, 0.5 to 5% of TiO2, 0 to 0.3% of Li2O, 0 to 0.3% of Na2O, 0 to 0.5% of K2O and 0 to 2% of F2, the content of MgO+CaO being 4 to 11% and the content of Li2O+Na2O+K2O being 0 to 0.6%. The glass fiber has a low dielectric constant and a low dielectric tangent, is excellent in productivity and workability and is also excellent in water resistance, and the glass fiber is suitable for reinforcing printed wiring boards for high-density circuits.Type: GrantFiled: November 1, 2002Date of Patent: January 25, 2005Assignee: Nitto Boseki Co., Ltd.Inventor: Shinichi Tamura
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Publication number: 20040254056Abstract: Thermal insulation is provided for use in applications requiring continuous resistance to temperatures of 1260° C. without reaction with alumino-silicate firebricks, the insulation comprises fibres having a composition in wt % 65%<SiO2<86%, MgO<10%, 14%<CaO<28%, Al2O3<2%, ZrO2<3%, B2O3<5%, P2O5<5%, 72%<SiO2+ZrO2+B2O3+5*P2O5, 95%<SiO2+CaO+MgO+Al2O3+ZrO2+B2O3+P2O5. Addition of elements selected from the group Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or mixtures thereof improves fibre quality and the strength of blankets made from the fibres.Type: ApplicationFiled: April 22, 2004Publication date: December 16, 2004Inventors: Gary Anthony Jubb, Craig John Freeman
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Patent number: 6828264Abstract: Provided are glass compositions uniquely applicable for the preparation of ultrafine fibers for filtration and separation applications. The glasses meet all physical and chemical criteria, including that for biodissolution rate. In particular, the glasses exhibit good moisture resistance in combination with excellent biosolubility, allowing for storage of products under humid conditions and degradation at a high rate in the body if inhaled.Type: GrantFiled: March 14, 2002Date of Patent: December 7, 2004Assignee: Johns Manville International, Inc.Inventor: Jon Frederick Bauer
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Patent number: 6818575Abstract: A glass fiber composition has 52 to 62 percent by weight SiO2, 0 to 2 percent by weight NaO2O, 16 to 25 percent by weight CaO, 8 to 16 percent by weight Al2O3, 0.05 to 0.80 percent by weight Fe2O3, 0 to 2 percent by weight K2, 1 to 5 percent by weight MgO, 0 to 5 percent by weight B2O3, to 0 to 2 percent by weight TiO2, and 0 to 1 percent by weight F, and further has a log 3 forming temperature of no greater than 1240° C. based on an NIST 714 reference standard, a &Dgr;T of at least 50° C., and a SiO2/RO ratio of no greater than 2.35.Type: GrantFiled: March 4, 2003Date of Patent: November 16, 2004Assignee: PPG Industries Ohio, Inc.Inventor: Frederick T Wallenberger
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Patent number: 6809050Abstract: High temperature glass fibers suitable for use as textile and reinforcements are specifically adapted to be used in high temperature applications such as sound absorbing material in engine exhaust mufflers. The glass fibers have compositions of up to 72 Mole % SiO2, 20 mole percent Al2O3, 22 mole percent alkaline earth oxides and may include small amounts of alkali oxides and ZrO2.Type: GrantFiled: October 31, 2000Date of Patent: October 26, 2004Assignee: Owens Corning Fiberglas Technology, Inc.Inventor: Peter B. McGinnis
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Patent number: 6794321Abstract: Provided are glass compositions uniquely applicable for the preparation of ultrafine fibers for filtration and separation applications. The glasses meet all physical and chemical criteria, including that for biodissolution rate.Type: GrantFiled: March 14, 2002Date of Patent: September 21, 2004Assignee: Johns Manville International, Inc.Inventor: Jon Frederick Bauer
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Patent number: 6794322Abstract: Low-boron, high-barium glass compositions and fine-diameter glass fibers for forming clean room HEPA and ULPA filters, are provided. The compositions and resulting glass fibers preferably comprise a low concentration, less than about 1 weight percent, of boric oxide, a relatively high concentration of barium, such as from about 5.5 to about 18 weight percent barium oxide, and a concentration of alkali oxide ranging from about 10 to about 14.5 weight percent. Alumina is preferably present in the glass fiber compositions and the resulting glass fibers in a range of from about 4 weight percent to about 8 weight percent, and calcium oxide and magnesium oxide are preferably present in a range of from about 1 weight percent to about 6 weight percent and from about 0 weight percent to about 3.5 weight percent, respectively. The glass fiber compositions also preferably include from about 2 to about 6 weight percent zinc oxide, from about 0.1 to about 1.Type: GrantFiled: December 5, 2001Date of Patent: September 21, 2004Assignee: Evanite Fiber CorporationInventor: Anup Sircar
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Publication number: 20040177650Abstract: The invention relates to a method for producing mineral wool, whereby a cracking catalyst having an aluminum oxide content of at least 35 wt % is used as a base material or aggregate. Said catalyst materials produce waste products which are difficult to eliminate in the chemical industry and which can be reused in the production of mineral fibers and can be used in an economical and resource sparing manner.Type: ApplicationFiled: September 26, 2003Publication date: September 16, 2004Inventor: Hans Peter Noack
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Publication number: 20040092379Abstract: Improved glass compositions for glass fibers typically useful for fire resistant blankets or containers to provide high burn-through resistance at temperatures in excess of 2,300° F. and typically comprising 10.23% to 81.81% silica, 2.0% to 25.91% alumina, 0% to 12.0% sodium oxide, 0% to 6.0% potassiuim oxide, 3.0% to 15.0% calcium oxide, 1.80% to 10.50% magnesium oxide, 1.0% to 18.0% ferrous+ferric oxide, and 0% to 4.0% titanium dioxide; the improved glass compositions may include 0% to 9% lithium oxide, 0% to 9% boron oxide, 0% to 5.0% zirconium oxide, 0% to 6.0% manganese oxide, and 0% to 4.0% phosphorous oxide.Type: ApplicationFiled: September 19, 2003Publication date: May 13, 2004Inventor: Albert Lewis
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Patent number: 6703103Abstract: The honeycomb structure of the present invention is formed from a nonwoven fabric in which a biologically soluble fiber is used, and exhibits superior biological solubility and high heat resistance.Type: GrantFiled: September 26, 2002Date of Patent: March 9, 2004Assignee: Nichias Co., Ltd.Inventors: Minoru Tanaka, Haruko Sasaki
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Patent number: 6698245Abstract: Rock fibres are made from a melt formed from a blend of low and high halogen waste materials. 80 to 98% are low halogen materials (containing less than 0.5 wt. % halogen) and 2 to 20% are high halogen materials (containing at least 1 wt. % halogen).Type: GrantFiled: July 25, 2000Date of Patent: March 2, 2004Assignee: Rockwool International A/SInventors: Vermund Rust Christensen, Soren Lund Jensen, Jens Ranlov
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Patent number: 6686304Abstract: The present invention provides a glass fiber composition comprising: 52 to 62 percent by weight SiO2, 0 to 2 percent by weight Na2O, 16 to 25 percent by weight CaO, 8 to 16 percent by weight Al2O3, 0.05 to 0.80 percent by weight Fe2O3, 0 to 2 percent by weight K2O, 1.7 to 2.6 percent by weight MgO, 0 to 10 percent by weight B2O3, 0 to 2 percent by weight TiO2, 0 to 2 percent by weight BaO, 0 to 2 percent by weight ZrO2, and 0 to 2 percent by weight SrO, and further including at least one material selected from the group consisting of: 0.05 to 1.5 percent by weight Li2O, 0.05 to 1.5 percent by weight ZnO, 0.05 to 3 percent by weight MnO, and 0.05 to 3 percent by weight MnO2, wherein the glass composition has a forming temperature of no greater than 2280° F. based on an NIST 714 reference standard and a liquidus temperature of no greater than 2155° F.Type: GrantFiled: November 28, 2001Date of Patent: February 3, 2004Assignee: PPG Industries Ohio, Inc.Inventor: Frederick T. Wallenberger
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Publication number: 20040014586Abstract: A glass composition to be used for manufacturing inorganic fiber has a composition that entirely or partly eliminates the use of expensive boron oxide that is employed to lower the glass softening point and the viscosity. The glass composition contains 45 to 75 wt % of SiO2, 1 to 6 wt % of Al2O3, 0 to 4 wt % of MgO, 0 to 15 wt % of CaO, 0 to 6 wt % of B2O3, 0.1 to 10 wt % of BaO, 0.1 to 25 wt % of SrO, 5 to 17 wt % of Na2O, 0.5 to 10 wt % of K2O and 0 to 3.5 wt % of Fe2O3.Type: ApplicationFiled: April 10, 2003Publication date: January 22, 2004Inventors: Keiji Otaki, Yukiyoshi Shinobu, Naoko Baba
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Publication number: 20030224922Abstract: A glass fiber composition has 52 to 62 percent by weight SiO2, 0 to 2 percent by weight NaO2O, 16 to 25 percent by weight CaO, 8 to 16 percent by weight Al2O3, 0.05 to 0.80 percent by weight Fe2O3, 0 to 2 percent by weight K2, 1 to 5 percent by weight MgO, 0 to 5 percent by weight B2O3, to 0 to 2 percent by weight TiO2, and 0 to 1 percent by weight F, and further has a log 3 forming temperature of no greater than 1240° C. based on an NIST 714 relerence standard, a &Dgr;T of at least 50° C., and a SiO2/RO ratio of no greater than 2.35.Type: ApplicationFiled: March 4, 2003Publication date: December 4, 2003Inventor: Frederick T Wallenberger
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Patent number: 6627568Abstract: A raw material including SiO2, MgO and TiO2, as essential components, is melt by heating at 1700 to 2000° C. The melt is fiberized by quenching in order to obtain inorganic fiber. The obtained inorganic fiber includes SiO2, MgO and TiO2 as essential components and an amorphous portion having these components in its structure.Type: GrantFiled: August 27, 2001Date of Patent: September 30, 2003Inventors: Katsuya Kusuno, Satoshi Dohi, Hideki Kitahara
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Publication number: 20030181306Abstract: Mineral wool capable of dissolving in a physiological medium, and which comprises fibers whose constituents are mentioned below in the following percentages by weight: 1 SiO2 35-60%, preferably 39-55% Al2O3 12-27%, ″ 16-25% CaO 0-35%, ″ 3-25% MgO 0-30%, ″ 0-15% Na2O 0-17%, ″ 6-12% K2O 0-17%, ″ 3-12% R2O (Na2O + K2O) 10-17%, ″ 12-17% P2O5 0-5%, ″ 0-2% Fe2O3 0-20%, B2O3 0-8%, ″ 0-4% TiO2 0-3%,Type: ApplicationFiled: November 21, 2002Publication date: September 25, 2003Inventors: Jean-Luc Bernard, Serge Vignesoult, Patrice Lehuede
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Publication number: 20030166446Abstract: An improved glass composition for glass fibers having high heat resistance properties without melting, and typically comprising standard glass raw materials.Type: ApplicationFiled: March 4, 2002Publication date: September 4, 2003Inventor: Albert Lewis
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Patent number: 6528443Abstract: A composition for a water soluble glass is described. The composition is unusual in that it contains no or very small quantities (up to 5 mole %) of alkali earth metal compounds. The composition typically comprises P2O5: 40 to 60 mole %; B2O3: 0 to 10 mole %; Na2O: 30 to 40 mole %; K2O: 5 to 10 mole %; Ag2O: 0 to 5 mole %; and up to a total of 5 mole % of other compounds such as CaO, MgO etc. The composition is especially suitable for processing into water soluble glass fibers or wool since the melting point is very low, usually less than 350° C.Type: GrantFiled: January 18, 2001Date of Patent: March 4, 2003Assignee: Giltech LimitedInventor: David Michael Healy
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Publication number: 20020193231Abstract: Provided are glass compositions uniquely applicable for the preparation of ultrafine fibers for filtration and separation applications. The glasses meet all physical and chemical criteria, including that for biodissolution rate.Type: ApplicationFiled: March 14, 2002Publication date: December 19, 2002Inventor: Jon Frederick Bauer
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Patent number: 6484539Abstract: The present invention provides a method for drawing fibers from materials which exhibit low viscosities at the equilibrium melting temperature. Further, the present invention provides novel drawn fibers from materials which were thought to be incompatible with a fiber-drawing process. The present invention also provides a means of minimizing recrystallization of molten materials during fiber drawing. Still further, the present invention provides novel drawn fibers with a greater tensile strength and greater concentrations of additives as compared to prior art fibers. Lastly, the present invention provides a means for producing crystalline fibers with controlled chemical compositions, and fibers with high tensile strengths as compared to prior art fibers of the same composition.Type: GrantFiled: July 8, 1998Date of Patent: November 26, 2002Assignee: Containerless Research, Inc.Inventors: Paul C. Nordine, J. K. Richard Weber, John J. Felten
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Patent number: 6468932Abstract: The invention relates to Al2O3-containing and high-temperature resistant glass sliver on silica basis having a highly textile, cotton-like and voluminous character. The invention also relates to glass staple fiber products from said glass sliver and their use. The textile character and high-temperature resistance are obtained in particular by selective acid extraction. The composition of the inventive glass sliver comprises in particular SiO2 as main component and 1-5% (wt.) Al2O3 as subsidiary component.Type: GrantFiled: January 24, 2000Date of Patent: October 22, 2002Inventors: Richter Robin, Focke Thomas, Lehr Sven
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Patent number: 6458436Abstract: Mineral fiber products, in particular rigid bonded mineral fiber products, are provided which comprise composite mineral fibers having a coating-core configuration wherein the core provides at least 90% by weight of the fibers and is formed of mineral melt and the coating is coated onto the core. The mineral melt is chosen so that the fibers without coating have adequate biological solubility and the coating comprises a phosphate or hydrogen phosphate of alkali metal, quaternary ammonium or ammonium in an amount of at least 0.3% or by weight of the core. The coated fibers retain their biological solubility while improving resistance to ageing in use.Type: GrantFiled: August 11, 1998Date of Patent: October 1, 2002Assignee: Rockwool International A/SInventors: Erling Hansen, Povl Nissen, Soren Lund Jensen
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Patent number: 6399525Abstract: Glass fibers prepared by flame attenuation display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glass fibers exhibit a biodissolution greater than about 350 ng/cm/2hr.Type: GrantFiled: July 12, 2001Date of Patent: June 4, 2002Assignee: Johns Manville International, Inc.Inventors: Foster Laverne Harding, Jon Frederick Bauer, Harry Hand Russell, III, Xiaojie Xu
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Patent number: 6381989Abstract: A method for processing a glass fiber material, wherein the glass fiber material has been heat treated at a temperature less than or equal to the annealing temperature of the glass for a length of time effective to prevent separation and fraying of the edges of the material upon cutting.Type: GrantFiled: August 21, 2000Date of Patent: May 7, 2002Assignee: Jeneric/Pentron IncorporatedInventors: Ajit Karmaker, Arun Prasad
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Patent number: 6358872Abstract: A mineral fiber composition which is soluble in biological fluids contains substantially 45-65% by weight of SiO2 15-40% by weight of CaO 0-20% by weight of MgO 0-6% by weight of Na2O+K2O and in addition aluminium and/or iron oxides as well as phosphorus oxide in such amounts that the weight ratio of P2O5 to the sum of Al2O3 and iron oxide is circa 0.4 to 6.Type: GrantFiled: October 27, 1997Date of Patent: March 19, 2002Assignee: Paroc Group Oy ABInventors: Kirsti Marjatta Karppinen, Michael Stig Folke Perander, Peter Arnold Henrik Solin, Antero Olavi Pehkonen, Seija Marketta Maine
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Patent number: 6358871Abstract: Low-boron, high-barium glass compositions and fine-diameter glass fibers for forming clean room HEPA and ULPA filters, are provided. The compositions and resulting glass fibers preferably comprise a low concentration, less than about 1 weight percent, of boric oxide, a relatively high concentration of barium, such as from about 5.5 to about 18 weight percent barium oxide, and a concentration of alkali oxide ranging from about 10 to about 14.5 weight percent. Alumina is preferably present in the glass fiber compositions and the resulting glass fibers in a range of from about 4 weight percent to about 8 weight percent, and calcium oxide and magnesium oxide are preferably present in a range of from about 1 weight percent to about 6 weight percent and from about 0 weight percent to about 3.5 weight percent, respectively. The glass fiber compositions also preferably include from about 2 to about 6 weight percent zinc oxide, from about 0.1 to about 1.Type: GrantFiled: March 22, 2000Date of Patent: March 19, 2002Assignee: Evanite Fiber CorporationInventor: Anup Sircar
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Publication number: 20020032116Abstract: The use of P2O5 and or B2O3 as a component to improve the refractoriness of inorganic fibres comprising SiO 2, and CaO and/or MgO is described. The inorganic fibres have a composition such that SiO 2+P2O5 (58+(if MgO 10, 0.5×(MgO10) else 0)) 2.4 wt. %.Type: ApplicationFiled: December 21, 1998Publication date: March 14, 2002Inventors: GARY ANTHONY JUBB, PAUL NIGEL EATON, PHILIP JOHN CANTY, ALISON JANE WASSELL
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Patent number: 6346494Abstract: Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400° C. Novel fibers contain at least 18% Al2O3. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibres may be selected by determining solubility at pH 4.5 or in macrophage.Type: GrantFiled: July 9, 1999Date of Patent: February 12, 2002Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg
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Patent number: 6319866Abstract: Man-made vitreous fibers have a solubility of pH 4.5 of at least 20 nm per day and a melt viscosity of 10 to 70 poise at 1400° C. Novel fibers contain at least 18% Al2O3. Particular products include external wall insulation or cladding and pipe sections. A composition for making suitable fibres may be selected by determining solubility at pH 4.5 or in macrophage.Type: GrantFiled: July 9, 1999Date of Patent: November 20, 2001Assignee: Rockwool International A/SInventors: Soren Lund Jensen, Vermund Rust Christensen, Marianne Guldberg