Patents Assigned to Freudenberg Nonwovens Limited Partnership
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Publication number: 20090233075Abstract: A fire blocking non-woven textile containing a first carded web of char-forming fibers containing aramid or melamine/formaldehyde fiber and a second carded web of oxygen-depleting fibers comprising a blend of polyacrylonitrile copolymer with a halogen comonomer and a polyester polymer. The webs may be needled-punched or thermally bonded and remain as separate layers separating the action of the char forming and oxygen depleting layers to optimize char strength, provide a light weight product, which may satisfy 16 CFR 1633 at thicknesses of up to 3.0 mm.Type: ApplicationFiled: April 27, 2009Publication date: September 17, 2009Applicant: FREUDENBERG NONWOVENS LIMITED PARTNERSHIPInventors: Eberhard Link, James Frasch
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Publication number: 20070283493Abstract: The present invention relates to a flame-retardant removable cover which may be applied to a mattress. The removable cover, when applied to mattress, may reduce the peak heat release rate and/or total energy released in accordance with 16 CFR 1633 testing protocols. The cover may comprise a non-woven material. The removable cover may also comprise a non-woven type construction and an elastomeric material. The removable cover may therefore be designed with respect to the different requirements of those mattresses to which it may be applied to assist in meeting open flame mattress flammability standards.Type: ApplicationFiled: June 7, 2007Publication date: December 13, 2007Applicant: Freudenberg Nonwovens Limited PartnershipInventors: Eberhard Link, James Frasch, Ashutosh P. Karnik, Anke Bold, Amelia Tosti, Charles Mason
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Patent number: 6890244Abstract: A polishing pad for polishing semiconductors and other planar substrates in the presence of a slurry comprising abrasive particles and a dispersive agent is disclosed. The polishing pad includes a soluble component within a polymer matrix component. The soluble component includes particles soluble in the slurry sufficiently to provide a void structure in the polishing surface of the pad. The void structure enhances the polishing rate and uniformity by increasing the mobility of the abrasive particles while reducing scratching of the polished surface. Additives that further enhance polishing and/or assist in the removal of residues generated during polishing, such as surfactants and removers, are optionally incorporated in the soluble particles or topographically coated on the soluble particles.Type: GrantFiled: September 18, 2003Date of Patent: May 10, 2005Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Oscar K. Hsu, Jean K. Vangsness, Scott C. Billings, David S. Gilbride
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Patent number: 6846342Abstract: A filter pack is formed of a pleated filter section and a top edge band and a bottom edge band that form a frame. The filter section and the frame are formed of a nonwoven polymer material, preferably a polyester material. The filter section is retained in the frame by an adhesive, preferably also a polyester material. The filter pack provides more filtration media per area, leading to more efficient filtration. The filter pack is fully shreddable and does not require separation into various components for recycling.Type: GrantFiled: July 17, 2003Date of Patent: January 25, 2005Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Kent Mertz, Beatrix Yvonne Schmitt, Markus Schmitt
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Publication number: 20040072507Abstract: A polishing pad for polishing semiconductors and other planar substrates in the presence of a slurry comprising abrasive particles and a dispersive agent is disclosed. The polishing pad includes a soluble component within a polymer matrix component. The soluble component includes particles soluble in the slurry sufficiently to provide a void structure in the polishing surface of the pad. The void structure enhances the polishing rate and uniformity by increasing the mobility of the abrasive particles while reducing scratching of the polished surface. Additives that further enhance polishing and/or assist in the removal of residues generated during polishing, such as surfactants and removers, are optionally incorporated in the soluble particles or topographically coated on the soluble particles.Type: ApplicationFiled: September 18, 2003Publication date: April 15, 2004Applicant: FREUDENBERG NONWOVENS LIMITED PARTNERSHIPInventors: Oscar K. Hsu, Jean K. Vangsness, Scott C. Billings, David S. Gilbride
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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: 6656018Abstract: A polishing pad for polishing semiconductors and other planar substrates in the presence of a slurry comprising abrasive particles and a dispersive agent is disclosed. The polishing pad includes a soluble component, preferably fibrous, within a polymer matrix component. The fibrous component includes fibers soluble in the slurry sufficiently to provide a void structure in the polishing surface of the pad. The void structure enhances the polishing rate and uniformity by increasing the mobility of the abrasive particles while reducing scratching of the polished surface. Additives that further enhance polishing and/or assist in the removal of residues generated during polishing, such as surfactants and removers, are optionally incorporated in the fibrous substance or topographically coated on the fibrous substance.Type: GrantFiled: April 10, 2000Date of Patent: December 2, 2003Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Oscar K. Hsu, Jean K. Vangsness, Scott C. Billings, David S. Gilbride
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Patent number: 6464745Abstract: A minipleat synthetic filter assembly is provided. The filter assembly includes a frame assembly and a section of pleated filter media mounted within the frame assembly. The frame assembly includes a plurality of corner members and an equal plurality of side members interconnecting the corner members. The frame assembly may be made in any desired size and shape to accommodate a wide variety of applications. The section of filter media is a sheet of a synthetic nonwoven material folded to form minipleats having a spacing between adjacent peaks of no greater than 20 mm.Type: GrantFiled: January 26, 2001Date of Patent: October 15, 2002Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Samuel Rivera, Simon D. Ladd, Michelle Pritzkau, Kent Mertz, Markus Schmitt
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Patent number: 6447566Abstract: A filtration system has a main filter assembly having a frame and filter media comprising pleated sections arranged in a row in V shapes within the frame. The filter media is spaced from an upstream face of the frame a distance sufficient to prevent blinding of the filter media by an upstream filter media, thereby eliminating a filtration stage and reducing the volume of the filtration system. Filter media alignment members disposed within the frame assist in holding the filter media sections in alignment within the frame. In another embodiment, flexible strips of edge banding, preferably of a filter material, are affixed to adjacent upper and lower longitudinal edges of the sections of the filter media. The edge banding minimizes pressure drop across the filter and is simpler and less costly to manufacture.Type: GrantFiled: January 11, 2001Date of Patent: September 10, 2002Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Samuel Rivera, Simon D. Ladd
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Publication number: 20020100264Abstract: A minipleat synthetic filter assembly is provided. The filter assembly includes a frame assembly and a section of pleated filter media mounted within the frame assembly. The frame assembly includes a plurality of corner members and an equal plurality of side members interconnecting the corner members. The frame assembly may be made in any desired size and shape to accommodate a wide variety of applications. The section of filter media is a sheet of a synthetic nonwoven material folded to form minipleats having a spacing between adjacent peaks of no greater than 20 mm.Type: ApplicationFiled: January 26, 2001Publication date: August 1, 2002Applicant: FREUDENBERG NONWOVENS LIMITED PARTNERSHIPInventors: Samuel Rivera, Simon D. Ladd, Michelle Pritzkau, Kent Mertz, Markus Schmitt
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Patent number: 6010548Abstract: A spaced pocket filter assembly has a pocket secured to a holding frame and a spacing member within the pocket made of a single sheet of material. The spacing member has an alternately folded Z or zig zag configuration and is secured to the interior of the pocket along each of the fold lines. The pocket assembly can be manufactured by interposing a roll of a sheet media for the spacing member between rolls of filter media for the pocket. The spacing member media is folded into the Z or zig zag configuration, layered between the pocket media, and secured to the pocket media continuously along the fold lines.Type: GrantFiled: January 30, 1998Date of Patent: January 4, 2000Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Robert B. Burkhead, Klaus Schwobel, Udo Michaelis
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Patent number: 5063101Abstract: Disclosed is a textile product and a method for making that product for a shirt or blouse interlining formed of a bonded base material having bonded thereon a fleece of adhesive fibers. A plurality of adhesive dots are applied on that surface of the fleece opposite to the surface bonded to the base material. The dots are substantially in a singular planar arrangement and, at least some of the dots, are separated from the base material by the fleece. The interlining can be fused to a shirt fabric such, as a broadcloth, to provide a good and smooth surface appearance. With the product of the invention, the smooth surface appearance is retained even after washing.Type: GrantFiled: December 23, 1988Date of Patent: November 5, 1991Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Peter S. Grynaeus, Anthony Hollingsworth, Chester J. Petkiewicz
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Patent number: 4906507Abstract: Disclosed is a composite adhesive web and a process for the production of such a web. The thermally adhesive web of the invention is comprised of a composite of randomly arranged thermoplastic filaments or, parallel thermoplastic filaments interconnected by randomly arranged thermoplastic fibers or filaments, and a fibrous thermal adhesive nonwoven sheet containing thermoplastic fibers, preferably low melting thermally adhesive fibers.Type: GrantFiled: March 13, 1987Date of Patent: March 6, 1990Assignee: Freudenberg Nonwovens Limited PartnershipInventors: Peter S. Grynaeus, Gerhard Schaut, Chester J. Petkiewicz