Coated, Impregnated, Or Autogenously Bonded Patents (Class 442/275)
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Patent number: 10710329Abstract: A heat protection product comprising a felt layer, which comprises polysulfone polyamide fibers, and a textile layer, which comprises inorganic fibers, said textile layer comprising a metal layer.Type: GrantFiled: January 19, 2015Date of Patent: July 14, 2020Assignee: Zipper-Technik GmbHInventors: Frank Reusswig, Manfred Kirschning, Sean Plummer
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Publication number: 20140302735Abstract: Geocomposite articles that can provide a barrier against high conductivity water e.g., ocean water, are described and their method of manufacture, for waterproofing surfaces that contact high conductivity water. The geocomposite article mat includes a woven or non-woven geotextile sheet or mat containing a powdered or granular partially cross-linked acrylamide/acrylate/acrylic acid copolymer across its entire major surface(s). The powdered or granular copolymer has an unexpectedly high free-swell when hydrated with High Conductivity water, such as ocean water. A liquid-impermeable cover sheet is adhered to the upper major surfaces of the filled copolymer-carrying geotextile to provide a primary high conductivity water barrier layer that, if ruptured, is sealed by the swell of an underlying layer of water-insoluble, partially cross-linked acrylamide/acrylic acid copolymer.Type: ApplicationFiled: June 20, 2014Publication date: October 9, 2014Inventors: Michael Donovan, Thomas W. Beihoffer, Nataliya V. Larionova, Marek R. Mosiewicz
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Patent number: 8853105Abstract: A helmet shell is formed having an outer section of fibrous layers, a middle section of fibrous layers and an inner section of fibrous layers. The outer section layers contain high tenacity abrasive fibers in a resin matrix. The middle section layers contain high strength polyolefin fibers and are in the form of woven or knitted fabrics with a resin matrix. The inner section layers contain high strength polyolefin fibers and are in the form of non-woven fabrics with a resin matrix. The helmet is lightweight and resists penetration of rifle bullets.Type: GrantFiled: December 20, 2007Date of Patent: October 7, 2014Assignee: Honeywell International Inc.Inventors: Ashok Bhatnagar, Bradley L. Grunden, Brian D. Arvidson, Lori L. Wagner
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Patent number: 8603925Abstract: The invention provides a leather-like sheet material which is excellent in surface appearance, texture and physical properties and considerate of the environment; a process for the production thereof; and interior, clothing, and industrial materials made by using the same. A leather-like sheet material made from a nonwoven fabric which is constituted of ultra-fine fibers having a mean single-fiber fineness of 0.001 to 0.5 dtex and impregnated with a self-emulsifiable polyurethane, wherein the self-emulsifiable polyurethane and the ultra-fine fibers do substantially not adhere closely to each other, the moieties of the polyurethane have a nonporous structure, and the polyurethane has a structure crosslinked by siloxane bond in the molecular structure.Type: GrantFiled: November 27, 2006Date of Patent: December 10, 2013Assignee: Toray Industries, Inc.Inventors: Gen Koide, Nobuhiro Maeda, Masaru Ueno, Yoshikazu Yakake
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Patent number: 8460514Abstract: The present invention relates to an industrial fabric, in particular press fabric or transfer belt, for use in a papermaking machine. The industrial fabric includes a porous composite structure, having a batt fiber structure and particulate polymeric material. The batt fiber structure has an upper surface and a lower surface extending parallel to the upper surface and spaced from the upper surface along a thickness direction extending perpendicular to the upper and lower surface. The particulate polymeric material is partly fused together and bonded with fibers extending on at least one of the surfaces of the batt fiber structure and with fibers inside the batt fiber structure such that the polymeric material partly impregnates fibers of the batt structure and partly fills interstices between fibers of the batt structure to form the porous composite structure.Type: GrantFiled: February 3, 2010Date of Patent: June 11, 2013Assignee: Voith Patent GmbHInventors: Hans Ragvald, Kjell Anders Karlsson, Anders Bertilsson, Pia Dela Nord
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Patent number: 8324314Abstract: A composition for imparting surface properties to substrates comprising a polymer of at least one polyurethane having at least one urea linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (b) at least one fluorinated compound selected from the formula (I): Rf1-L-X??(I) wherein Rf1 is a monovalent, partially or fully fluorinated, linear or branched, alkyl radical having 2 to 100 carbon atoms; optionally interrupted by 1 to 50 oxygen atoms; wherein the ratio of carbon atoms to oxygen atoms is at least 2:1 and no oxygen atoms are bonded to each other; L is a bond or a linear or branched divalent linking group having 1 to about 20 carbon atoms, said linking group optionally interrupted by 1 to about 4 hetero-radicals selected from the group consisting of —O—, —NR1—, —S—, —SO—, —SO2—, and —N(R1)C(O)— wherein R1 is H or C1 to C6 alkyl, and said linking group optionally substituted with CH2Cl; X is an isocyanate-reactive group selecType: GrantFiled: October 12, 2009Date of Patent: December 4, 2012Assignee: E.I. du Pont de Nemours and CompanyInventors: Gerald Oronde Brown, Michael Henry Ober
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Patent number: 8252147Abstract: A press felt 10 comprises a base body 30 and a batt layer having a wet paper side layer 20. The wet paper web side layer 20 has a base body side batt layer 22, upright fiber bundles 50 are formed in the basebody side batt layer 22. After needle punching a core-in-sheath fiber 41, the upright fiber bundles are formed by melting the sheath member of the core-in-sheath fibers 41 into a pillar form melted by heat treatment. As a result, the base body side batt layer 22 is made dense and blocks water within the press side batt layer 23 from moving to the wet paper web side, thereby preventing rewetting; moreover, the invention successfully enhances resistance to abrasion and compression fatigue of the felt 10 by the upright fiber bundles 50 fusion-bonded into a pillar form.Type: GrantFiled: December 27, 2007Date of Patent: August 28, 2012Assignee: Ichikawa Co., Ltd.Inventor: Takashi Ohuchi
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Patent number: 8147654Abstract: A wet paper web transfer belt (1) has a wet paper web-side layer (31), including a hydrophilic fibrous body (30), and a machine-side layer (32). A base fabric (33) disposed in the belt comprises a first woven fabric (34), disposed on a wet paper web (W) side, and a second woven fabric (35) disposed on a press roll (10) side, and the first woven fabric (34) and the second woven fabric (35) are stacked together. A portion of the hydrophilic fibrous body (30) is exposed on a surface (37) of the wet paper web-side layer (31). The first woven fabric (34) and the second woven fabric (35) include weft yarns (36) made of a material of low water absorptivity. When the hydrophilic fibrous body (30) is formed in the wet paper web-side layer (31) of the belt (1) by needle punching, an increase in the widthwise dimension of the belt due to the absorption of water by the hydrophilic fibrous body (30) is reduced.Type: GrantFiled: October 26, 2007Date of Patent: April 3, 2012Assignee: Ichikawa Co., Ltd.Inventors: Takeshi Sawada, Kenji Inoue
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Patent number: 7820569Abstract: A composite sheet used for artificial leather with low elongation and excellent softness which includes a non-woven fabric layer, a woven or knitted fabric layer and a polyurethane resin, wherein the non-woven fabric layer and the woven or knitted fabric layer are entangled with each other.Type: GrantFiled: January 29, 2003Date of Patent: October 26, 2010Assignee: Kolon Industries Inc.Inventors: Young-Nam Hwang, Won-Jun Kim, Jae-Hoon Chung
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Patent number: 7674356Abstract: A paper machine belt that includes at least one layer having parallel yarns. Additionally, a ratio of a volume of the parallel yarns in the at least one layer to a void volume in the at least layer is greater than 1:1.Type: GrantFiled: November 16, 2006Date of Patent: March 9, 2010Assignee: Voith Fabrics Patent GmbHInventors: Kjell Anders Karlsson, Vaeinoe Per-Ola Lidar
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Publication number: 20090286436Abstract: The invention provides a leather-like sheet material which is excellent in surface appearance, texture and physical properties and considerate of the environment; a process for the production thereof; and interior, clothing, and industrial materials made by using the same. A leather-like sheet material made from a nonwoven fabric which is constituted of ultra-fine fibers having a mean single-fiber fineness of 0.001 to 0.5 dtex and impregnated with a self-emulsifiable polyurethane, wherein the self-emulsifiable polyurethane and the ultra-fine fibers do substantially not adhere closely to each other, the moieties of the polyurethane have a nonporous structure, and the polyurethane has a structure crosslinked by siloxane bond in the molecular structure.Type: ApplicationFiled: November 27, 2006Publication date: November 19, 2009Applicant: Toray Industries, Inc.Inventors: Gen Koide, Nobuhiro Maeda, Masaru Ueno, Yoshikazu Yakake
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Patent number: 7306703Abstract: The present invention is directed to fabrics for paper making machines that are rendered contamination resistant and maintain good permeability as a result of a durable coating that lasts the entire life of the fabric. A fluoropolymer will render the fabric contamination resistant over the entire fabric lifetime.Type: GrantFiled: May 23, 2003Date of Patent: December 11, 2007Assignee: Albany International Corp.Inventor: John M. Hawes
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Patent number: 7172982Abstract: An industrial fabric having improved sheet restraint and wear resistance along with acceptable permeability. The improvement is effected by coating only the high spots of the fabric with silicone material. The coating methods used in this invention may include kiss roll coating, gravure roll coating, rotogravure printing, rotary screen coating, screen-printing and/or flexography. The improvement is also applicable to corrugator fabrics.Type: GrantFiled: December 30, 2002Date of Patent: February 6, 2007Assignee: Albany International Corp.Inventors: Adam J. Jaglowski, Alan L. Billings
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Patent number: 7135096Abstract: A press felt for use in the press section of a papermaking machine is provided. The press felt includes a base fabric layer and at least one layer of a staple fiber batt material connected thereto. The staple fiber batt material is includes between 20% to 100% by weight of a regenerated cellulosic staple fiber material, such as rayon, and from 80% to 0% by weight of a polymeric staple fiber, such as nylon. A scrim including regenerated cellulosic material can also be incorporated into the press felt construction, either between two layers of batt material, or between a batt layer and the base fabric. The regenerated cellulosic staple fibers of the batt and/or scrim having a dtex from at least about 1.1 to about 44, and are preferably non-fibrillatable. As a further option, at least a portion of the base fabric includes a regenerated celluliosic material.Type: GrantFiled: August 12, 2004Date of Patent: November 14, 2006Assignee: AstenJohnson, Inc.Inventors: Marc P. Despault, Brady S. Patterson
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Patent number: 7132024Abstract: A method for manufacturing an artificial leather comprises the following steps. First, ultramicrofiber-forming fibers having an islands-in-sea type cross-sectional configuration are formed by blend spinning or conjugate spinning. Secondly, a porous reinforcement sheet of low compactness is formed from polyester, polyurethane or polyolefin by spunbonding, meltblowing or calendering. Next, the ultramicrofibers are entangled with the reinforcement sheet by needle punching or spunlace to form the complex reinforced ultramicrofiber nonwoven fabric. The nonwoven is impregnated or coated with an elastomer resin composition, and then subjected to a coagulating process, a washing process, a drying process and a removing process to produce a semi-product leather. Finally, the semi-product leather is then processed to produce the artificial leather.Type: GrantFiled: March 11, 2003Date of Patent: November 7, 2006Assignee: San Fang Chemical Industry Company, Ltd.Inventors: Ching Tang Wang, Mong-Ching Lin, Chung Chih Feng, Kuo Kuang Cheng, Sheng Lien Chung, Pai Hsiang Wu, Chiao Fa Yang, Chun Hsien Li
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Patent number: 6969691Abstract: A doctor blade for removing water from a mating member, such as a grooved elastic belt in the press part of a papermaking machine, comprises a resin-impregnated fibrous laminate, in which at least a part of the warp of a base material in the laminate, which comes into contact with the mating member, is brush-shaped, so that the warp enters the insides of the grooves to remove water therefrom.Type: GrantFiled: March 11, 2003Date of Patent: November 29, 2005Assignee: Ichikawa Co., Ltd.Inventors: Tetsuo Takeuchi, Hirofumi Ishii
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Patent number: 6849565Abstract: Carpet backings and use thereof in tufted carpets with good tuft bind and fuzz resistance and free of inorganic and latex materials are disclosed. Backings suitable as tuftable primary backings or as secondary backings have a nonwoven fabric with thermoplastic filaments and a thermoplastic supporting fabric operatively attached as by needling, thermal calendaring or point bonding.Type: GrantFiled: August 8, 2000Date of Patent: February 1, 2005Assignee: BP Corporation North America Inc.Inventors: Hugh C. Gardner, Jack F. Godfrey, Kenneth R. Jones, Larry M. Bailey, Edward Barkis, Eric J. Bryant, Gregory P. Shelnutt
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Publication number: 20040234718Abstract: The present invention is directed to fabrics for paper making machines that are rendered contamination resistant and maintain good permeability as a result of a durable coating that lasts the entire life of the fabric. A fluoropolymer will render the fabric contamination resistant over the entire fabric lifetime.Type: ApplicationFiled: May 23, 2003Publication date: November 25, 2004Inventor: John M. Hawes
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Patent number: 6726809Abstract: An industrial process fabrics having embossed surfaces to facilitate water removal from the product such as paper and paper products being carried thereon by creating voids through embossing to assist in fluid management.Type: GrantFiled: September 26, 2001Date of Patent: April 27, 2004Assignee: Albany International Corp.Inventors: Michael J. Joyce, Maryann C. Kenney
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Patent number: 6713413Abstract: A buffing or polishing material has a nonwoven fleece layer and a backing layer that adds strength and dimensional stability to the material. The nonwoven fleece layer is a needled blend of natural fibers and synthetic fibers having a uniform density and working surface, resulting in a better polishing or finishing consistency. The material can withstand high heat levels and can be worked quickly, resulting in a more efficient polishing or finishing operation. The buff material can be converted into any preferred shape or tool, such as an endless belt, disc, flapwheel, or spiral band.Type: GrantFiled: December 22, 2000Date of Patent: March 30, 2004Assignee: Freudenberg Nonwovens Limited PartnershipInventor: Gerald F. Kruegler
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Patent number: 6712940Abstract: A papermachine belt particularly for use in a press and/or dryer section comprises a support fabric, a minimal nonwoven layer on the support fabric, a fusible thermoplastic layer, and a thicker batt over the thermoplastic layer. The whole structure is needled together, and the thermoplastic layer melted so that it is expressed through the overlying batt. The layer may be substituted by a nonwoven fabric containing composite yarns with thermoplastic sheaths or such yarns wound spirally around the belt. The support fabric may be substituted by a perforated composite membrane.Type: GrantFiled: February 22, 2001Date of Patent: March 30, 2004Assignee: Voith Fabrics Heidenheim GmbH & Co. KGInventor: Robert L. Crook
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Publication number: 20030157852Abstract: A water-vapor-permeable waterproof composite fabric having high flexibility, water pressure resistance and water laundering resistance is constituted from a substrate fabric and a polyether-ester elastomer (PEE-A) film layer laminated to the substrate fabric through a polyether-ester elastomer (PEE-B) binder layer, each of PEE-A and PEE-B including polyalkylene glycol residues, alkyleneglycol residues and dicarboxylic acid residues, in which composite fabric, (1) the PEE-A contains 5 to 25% by mass of polyethyleneglycol residues, (2) the PEE-A film layer is 5 to 5 &mgr;m thick, (3) the PEE-B has a melting temperature of at least 20° C. below that of the PEE-A and (4) the PEE-B binder layer is present in an amount of 2 to 20 g/m2.Type: ApplicationFiled: September 20, 2002Publication date: August 21, 2003Inventor: Hiroshi Honna
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Patent number: 6605188Abstract: Transfer belt for a paper machine, comprising a base structure (2) and a fiber batt layer (3) attached to the base structure and facing the fiber web. At least the fiber batt layer side of the belt is provided with a polymer matrix (4) impregnating the fiber batt layer (3). According to the idea of the invention, the transfer belt fiber batt layer comprises at least two fibers with different surface properties, the transfer belt surface facing the fiber web being thus provided with hydrophilic and, correspondingly, hydrophobic areas. The fibers in the fiber batt layer may differ from one another with regard to their polarity, hydrophilicity, electric charge, surface energy, friction properties, degree of fineness or porosity.Type: GrantFiled: March 15, 2002Date of Patent: August 12, 2003Assignee: Tamfelt Oyj ABPInventors: Satu Hagfors, Olli Jermo
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Patent number: 6514888Abstract: A cushioning material for forming press includes fiber material layers 31 and 32 superimposed with a bonding material layer 30 interposed, an upper rubber layer 33 positioned on an upper surface of one fiber material layer 31, a lower rubber layer 34 positioned on a lower surface of the other fiber material layer 32, an upper exudation preventing layer 35 positioned on an upper surface of the upper rubber layer 33, and a lower exudation preventing layer 36 positioned on a lower surface of the lower rubber layer 34.Type: GrantFiled: July 10, 1997Date of Patent: February 4, 2003Assignee: Yamauchi CorporationInventors: Atsuo Tanaka, Akira Yoshida
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Publication number: 20020193026Abstract: The device of the present invention comprises a moisture-permeable base material, a water-bearing gel, and a covering material, which are laminated in this order. The base material comprises a moisture-permeable material, e.g., a cloth material made of a natural and/or artificial fiber, a polymeric film, or a polymeric sheet. The base material may be a laminate. The water-bearing gel comprises a water-absorbable polymer and water. The covering material may comprise a cloth material made of a natural and/or artificial fiber, a polymeric film, or a polymeric sheet. The device can be warmed or cooled. When it is warmed, it can evolve steam that results from water in the gel. Thus, it can be used to give moisutre to and warm up human body, or to cool down it.Type: ApplicationFiled: June 5, 2002Publication date: December 19, 2002Inventors: Keizo Ota, Tetsuhiro Watanabe
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Publication number: 20020182956Abstract: A batting of a type having opposing faces and a softness and a flexibility and configured for use in the formation of a quilt is disclosed. The quilt may have at least one cover to be securably attached to the batting. An adhesive provided is with the batting so that the cover can be attached to the batting during formation of the quilt. The batting with the adhesive may be sold as a commercially available product in at least one desirable size for formation of the quilt. The batting may comprise a cotton material, or a polyester material, or a cotton and polyester material. The adhesive provided with the batting may be configured to be selectively activated when applying the cover for attachment to the batting. The adhesive provided with the batting may be removed by a treatment. The commercial product may include instructions for the use of the batting.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Jilene A. Repp, Francis A. Yogerst
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Publication number: 20020182967Abstract: A fire blocking material is disclosed comprising a nonwoven fabric including para-aramid fibers and pre-oxidized polyacrylonitrile, and optionally, a garnett of recycled polybenzimidazole, para-aramid or meta-aramid, or combinations thereof to form a fire blocking textile meeting Federal Aviation Administration regulation FAR 25.853 and Appendix F to Part 25.Type: ApplicationFiled: February 28, 2002Publication date: December 5, 2002Applicant: Tex Tech Industries Inc.Inventors: David F. Erb, Eliza L. Montgomery, Eric D. Ritter
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Patent number: 6470944Abstract: An unlaminated belt for a single-facer section of a corrugated board production line has a single base structure in the form of an endless loop lacking a seam. The base structure is made up of yarns oriented in the machine, or running, and cross-machine directions of the belt. At least one layer of staple fiber material is needled into the outside of the base structure, extends at least partly therethrough, and forms a layer on the outside of the base structure. The base structure, once so needled, is impregnated with a polymeric resin material. The yarns of the base structure, the staple fiber material and the polymeric resin material are all of high-temperature-resistant materials to enable the belt to withstand the conditions under which it must operate on a corrugator machine.Type: GrantFiled: October 20, 1999Date of Patent: October 29, 2002Assignee: Albany International Corp.Inventors: Alan L. Billings, Bernard Lantiegne
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Publication number: 20020090874Abstract: Plies of continuous fiber material are oriented and cut to the intended shape of a structural component, such as the vertical tail of an aircraft. Two skins or laminates are created by laying the cut-to-shape plies into a matched mold, with over-woven or over-braided mandrels or similar tooling details placed between the skins. The mold is closed and a thermosetting resin is injected into the mold to fully impregnate any fibers that were unimpregnated at the time of mold closure and to fully fill all void areas inside the mold. The mold is held closed with pressure, such as by a press, and heated to cure the resin while the resin in the mold is subjected to a hydrostatic pressure sufficient to constrain growth of voids. The contiguous faces of the impregnated braid or weave covering the mandrels are united by the resin, forming vertical or angular laminate between the inner faces of the skins.Type: ApplicationFiled: January 5, 2001Publication date: July 11, 2002Inventors: Elbert L. McKague, Marvin D. Black
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Patent number: 6207599Abstract: A nonwoven primary carpet backing includes thermoplastic polymer filaments or fibers bonded by means of a binder polymer. The backing includes at least a distinguishable thermoplastic woven layer, a distinguishable thermoplastic continuous layer, or a distinguishable nonwoven layer including filaments or fibers bonded by means of a binder polymer, which layer reduces the delamination strength of the backing, measured in accordance with DIN 54310, by at least 30% and preferably by at least 50%, with respect to the same backing without the distinguishable layer. Although the breaking strength of the untufted backing according to the invention is lower than that of untufted backings not including the distinguishable layer, the tufted backing according to the invention actually has a higher breaking strength and elongation than tufted backings not including the distinguishable layer.Type: GrantFiled: August 27, 1998Date of Patent: March 27, 2001Assignee: Akzo Nobel NVInventors: Peter Thomas Coolen, Samuel T. Johnson, III
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Patent number: 6136151Abstract: In a papermaking machine for making paper and paperboard products, a press belt, press roll cover, or long nip shoe press belt, is disclosed that has both a permanent microscale roughness and areas of both hydrophilic and hydrophobic nature which properties promote good sheet smoothness and printability, while allowing for excellent sheet release.Type: GrantFiled: December 18, 1998Date of Patent: October 24, 2000Assignee: Albany International Corp.Inventors: Francis L. Davenport, John R. Gray
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Patent number: 6124220Abstract: A laminated board comprising an intermediate layer and two surface layers formed thereon, in which board the intermediate layer comprises a central layer made of a nonwoven glass fiber fabric impregnated with a resin composition containing a thermosetting resin and an inorganic filler and upper and lower layers formed on the central layer, each being made of said resin composition containing a thermosetting resin and an inorganic filler, and the two surface layers formed on the intermediate layer are made of a thermosetting resin-impregnated fiber substrate; and a process for production of the laminated board.Type: GrantFiled: September 17, 1996Date of Patent: September 26, 2000Assignee: Sumitomo Bakelite Company LimitedInventors: Takahiro Nakata, Takahisa Iida, Takashi Yamaguchi, Toshihide Kanazawa
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Patent number: 6036819Abstract: A polymeric-resin-coated papermaking-processing belt, which may be used as a sheet-transfer, long nip press (LNP) or calender belt, includes a reinforcing base having the form of an endless loop with a face side and a back side, these being the outside and inside of the endless loop, respectively. The face side of the reinforcing base is coated with a polymeric resin material, while the back side has a staple fiber batt attached thereto. The staple fiber batt has a smooth, fused surface free of protruding fiber ends. This surface is kept clean more easily than that of a typical staple fiber batt. Methods for manufacturing the polymeric-resin-coated papermaking-processing belt, including several ways for providing the staple fiber batt with the smooth, fused surface, are also disclosed.Type: GrantFiled: June 29, 1998Date of Patent: March 14, 2000Assignee: Albany International Corp.Inventors: Lawrence G. Miller, Joseph Salitsky, Karen L. Crawford
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Patent number: 5945358Abstract: A papermaker's fabric is provided having a spun bonded reinforcement. A layer of spun bonded material may be placed in any one of a number of possible locations in the fabric, depending upon the felt stratification desired. For example, it may be attached to the upper surface (or paper contacting side) of the base fabric layer; to the lower surface (or machine contacting side) of the base fabric layer; between two base fabric layers, in the case of a laminated felt; between layers of fibers; or in any other desired location. The spun bonded material may be attached through the use of needling or by use of adhesives, low melts, or ultrasonic methods.Type: GrantFiled: January 31, 1996Date of Patent: August 31, 1999Assignee: Weavexx CorporationInventor: Rene Marchand
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Patent number: 5753570Abstract: A ceramic composite is provided comprising ceramic fibers, glass microballoons and/or diatoms, bound together with a ceramic reinforcing cloth with a sol-gel ceramic binder. The composite is particularly useful as a high strength, high temperature insulation material.Type: GrantFiled: June 5, 1995Date of Patent: May 19, 1998Assignee: The Boeing CompanyInventor: Darryl F. Garrigus
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Patent number: 5723209Abstract: Described is a rollable thermal insulation comprising synthetic fiber material and having a thermal conductivity of not more than 0.04 W/m*K (determined in accordance with DIN 4108 Part 1) and a DIN 4102 Part 1 fire behavior corresponding to building material class B1, wherein the synthetic fiber material is composed of carrier and bonding fibers made of polyester, preferably polyethylene terephthalate, the bonding fibers consisting in at least parts of the surface of a polyester having a melting point which is below the melting point of the carrier fibers.Type: GrantFiled: April 3, 1996Date of Patent: March 3, 1998Assignee: Hoechst Trevira GmbH & Co KGInventors: Heinz-Werner Borger, Peter Knobloch