Patents Assigned to A. Ahlstrom Corporation
  • Patent number: 10370797
    Abstract: A cellulosic fiber-based adhesive tape substrate, at least one side of which is coated with an aqueous mixture of: a) at least one organic polymer having pendant groups with at least one vinyl function; b) at least one polysiloxane comprising at least one hydrogenosiloxane monomer —(O—SiR1H)—, wherein R1 is a linear or branched and/or cyclic hydrocarbon chain which may contain heteroatoms; c) at least one hydrosilylation catalyst.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 6, 2019
    Assignee: Ahlstrom Corporation
    Inventor: Menno Dufour
  • Publication number: 20180207564
    Abstract: Blood separation media include a fibrous web formed by 50 to 99 parts by weight of glass microfibers, and 1 to 50 parts by weight of fibrillated fibers; a polymeric, hydrophilic binder; a wetting agent; and a salt. The binder covers at least a part of the glass microfibers, and the web is further impregnated with a wetting agent and it contains a salt which is capable of crenating red blood cells. The pore size of the media is smaller than the average pore size of red blood cells. Compared to conventional separation media, the invention will improve efficiency of the separation of the red blood cells from the plasma and increase the speed and volume of the separated material. The present invention also provides for a decrease in lysing of the red blood cells during the filtration process which gives improved purity of the material.
    Type: Application
    Filed: July 25, 2016
    Publication date: July 26, 2018
    Applicant: AHLSTROM CORPORATION
    Inventor: William HENNESSEY
  • Patent number: 9714478
    Abstract: A method to produce a unidirectional reinforcement for fiber reinforced composites by a resin transfer or vacuum infusion molding process include: laying continuous rovings unidirectionally side by side in one layer for forming a unidirectional web, applying thermoplastic or thermoset binder on the web, activating the binder for bonding the rovings together to form a unidirectional reinforcement, and forming flow passages for resin in a direction transverse to the direction of the unidirectional rovings by laying thin discrete flow passage having, under compression, an aspect ratio of equal or less than 2 on the continuous unidirectional rovings.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: July 25, 2017
    Assignee: AHLSTROM CORPORATION
    Inventor: Rainer Bergstrom
  • Patent number: 9662600
    Abstract: High efficiency and high capacity glass-free filtration media include a blend of synthetic non-fibrillated staple fibers and fibrillated cellulosic staple fibers, wherein the fibrillated cellulosic fibers are present in the media in an amount to achieve an overall filtration efficiency at 4 microns of 95% or higher and a ratio of filtration capacity to media caliper of 0.5 mg/in2/mils and greater. The filtration media is made by forming a wet laid sheet from a fibrous slurry blend of the synthetic non-fibrillated staple fibers and fibrillated cellulosic staple fibers, followed by drying the sheet to obtain the filtration media. Optionally, the filtration media may be provided with a resin binder and may be grooved and/or pleated.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: May 30, 2017
    Assignee: AHLSTROM CORPORATION
    Inventor: Ina Parker
  • Patent number: 9656195
    Abstract: A coalescence media for separation of water-hydrocarbon emulsions, the coalescence media comprising an emulsion-contacting sheet formed as a single dry layer from a wet-laid process using a homogenously distributed, wet-laid furnish of (a) a mixture of fibrous components of (a1) at least one type of a first group of cellulose and/or cellulose-based fibers, and (a2) at least one type of a second group of fibers selected from the group consisting of fibrillated fibers and glass microfibers, and (b) at least one non-fibrous component selected from the group consisting of (b1) a dry strength additive, and (b2) a wet strength additive. The fibrous components of the coalescence media constitute at least about 70% of the coalescence media, and includes a pore structure sufficient to coalesce water droplets having a droplet size of <3.5 ?m in biodiesel blends or in surfactant stabilized water-hydrocarbon emulsions.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: May 23, 2017
    Assignee: AHLSTROM CORPORATION
    Inventors: Christine Stanfel, Frank Cousart
  • Patent number: 9505193
    Abstract: A stitched unidirectional or multi-axial reinforcement and a method of producing a stitched unidirectional or multi-axial reinforcement includes transversely arranging thin discrete flow passage forming means having a diameter of 70-300 ?m in a direction transverse to the direction of the unidirectional rovings at least on the continuous rovings of the at least one layer, and stitching the thin discrete flow passage forming means and the continuous unidirectional rovings to one another to form a reinforcement.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: November 29, 2016
    Assignee: Ahlstrom Corporation
    Inventor: Rainer Bergström
  • Patent number: 9492775
    Abstract: The present invention is directed, in part, to air filtration media, air filtration media packs, air filtration elements, and methods of making air filtration media, media packs, and filtration elements. The air filtration media typically has a fiber composition that is primarily cellulose fibers, the media having a low solidity and low basis weight and being suitable for forming of structured flutes into the media. In certain embodiments a resin is added such as a solvent based resin.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 15, 2016
    Assignees: Donaldson Company, Inc., Ahlstrom Corporation
    Inventors: Kristin M. Amsden, Kevin R. Schouweiler
  • Publication number: 20160288429
    Abstract: A unidirectional reinforcement and a method of producing a unidirectional reinforcement for use in applications where high quality and strength is required. The unidirectional reinforcement includes transversely arranged thin discrete flow passage formed to ensure resin flow properties in a direction transverse to the direction of the unidirectional rovings. Thin discrete flow passage forming means are secured on the unidirectional rovings by means of additional yarns running on the thin discrete flow passage forming means and transverse thereto.
    Type: Application
    Filed: November 21, 2014
    Publication date: October 6, 2016
    Applicant: Ahlstrom Corporation
    Inventors: Rainer BERGSTROM, Ulla KOSONEN, Rami HAAKANA, Maija HOIKKANEN
  • Patent number: 9441327
    Abstract: A dimensionally stable paper and paper products, a production method for such paper, and uses of substances for conveying, modifying or improving dimensional stability of paper.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: September 13, 2016
    Assignee: AHLSTROM CORPORATION
    Inventors: Bernd Ullmann, Holger Arnold
  • Publication number: 20160186097
    Abstract: A dye-receiving material comprising:a support comprising synthetic fibers; and a three-dimensional network entangled with at least some of the fibers contained in the support. The three-dimensional network comprises a first polymer that is cross-linked by a second polymer; wherein the first polymer is a polyamine comprising primary amine groups, the first polymer being cationic and water soluble; and the second polymer is a water soluble polymer that is different from the first polymer. The second polymer containing repeating units comprising halohydrin and/or epoxide groups that are capable of forming covalent cross-links with the primary amine groups of the first polymer. Low amounts of cross-linking components are needed for high dye pick-up efficiency.
    Type: Application
    Filed: August 11, 2014
    Publication date: June 30, 2016
    Applicant: AHLSTROM CORPORATION
    Inventors: Diego FANTINI, Samuel MERLET
  • Publication number: 20160186375
    Abstract: A dye-receiving material comprising: a support comprising synthetic fibers; and a three-dimensional network entangled with at least some of the fibers contained in the support, the three-dimensional network comprising a first polymer that is cross-linked by a second polymer; wherein: the first polymer is a polyamine comprising primary amine groups, the first polymer being cationic and water soluble; and the second polymer is a water soluble polymer that is different from the first polymer, the second polymer containing repeating units comprising halohydrin and/or epoxide groups that are capable of forming covalent cross-links with the primary amine groups of the first polymer.
    Type: Application
    Filed: August 11, 2014
    Publication date: June 30, 2016
    Applicant: AHLSTROM CORPORATION
    Inventors: Diego FANTINI, Samuel MERLET, Menno DUFOUR
  • Patent number: 9353480
    Abstract: Sterilizable and printable, wet-laid non-woven substrate exhibiting high-strength and temperature resistance above 140° C., providing sufficient airflow to relieve pressure in a package formed from the substrate during sterilization, providing a significant barrier to penetration by bacteria and debris, and which is sealable to itself and to thermoplastic films, comprises blends of nanofibrillated lyocell fibers, microfibers, fibers having a flat, rectangular cross-section and binder fibers.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: May 31, 2016
    Assignee: Ahlstrom Corporation
    Inventors: Douglas McKee Benton, Rui Ferreira
  • Patent number: 9290877
    Abstract: A glazing method for improving abrasion resistance using a heated smooth roll to melt the lower-melting-point portion of bicomponent fibers as the spunbond web passes over the heated smooth roll. Because there is no external pressure exerted in a nip by an opposing second roller, as in calendering, the outer surface of the web which does not contact the heated smooth roll remains essentially unchanged and the nonwoven fabric exhibits no compression as a result of the glazing process. The roll temperature and dwell time (roll diameter, wrap angle and line speed) are controlled for the purpose of surface treating only one side of the nonwoven fabric to improve abrasion resistance while allowing the air permeability and web thickness to remain essentially unchanged.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: March 22, 2016
    Assignee: Ahlstrom Corporation
    Inventors: Mithun A. Shah, Rongguo Zhao
  • Publication number: 20160023149
    Abstract: A method for manufacturing a filtration media with improved filtration, strength, tear resistance and air permeability in the form of a relatively thin and lightweight wet-laid fibrous web that has a wet Mullen ratio of 20% to 90% to ensure that the media is flexible enough to be formed into a fluted structure, and strong enough to retain the fluted structure when would into a roll and to permit further processing.
    Type: Application
    Filed: March 14, 2014
    Publication date: January 28, 2016
    Applicant: AHLSTROM CORPORATION
    Inventors: KEVIN R. SCHOUWEILER, KENT WILLIAMSON
  • Publication number: 20160016101
    Abstract: A filtration media with improved filtration, strength, tear resistance and air permeability in the form of a relatively thin and lightweight wet-laid fibrous web that has a wet Mullen ratio of 60% to 80% to ensure that the media is flexible enough to be formed into a fluted structure, and strong enough to retain the fluted structure when wound into a roll and to permit further processing without the media becoming too brittle. The filtration media comprises a blend of cellulose and synthetic fibers having a weight percent of 81 wt % to 87 wt % of a weight of the media and a resin binder having a weight of 13 wt % to 19 wt % (preferably about 16 wt %) of the weight of the media.
    Type: Application
    Filed: March 14, 2014
    Publication date: January 21, 2016
    Applicants: DONALDSON COMPANY, INC., AHLSTROM CORPORATION
    Inventors: KEVIN R. SCHOUWEILER, KENT WILLIAMSON, KRISTIN AMSDEN, STEVEN D. SCHMEICHEL
  • Publication number: 20160016717
    Abstract: A single-layer fibrous substrate comprising, by dry weight compared with the weight of the substrate: between 39.9 and 87.9% natural fibers refined to above 50° SR; between 12 and 60% nanofibrillar polysaccharide; and between 0.1 and 4% of at least one retention agent.
    Type: Application
    Filed: March 19, 2014
    Publication date: January 21, 2016
    Applicant: AHLSTROM CORPORATION
    Inventors: Francois Toubeau, Gilles Vetter
  • Patent number: 8962128
    Abstract: Nonwoven substrate for joint tape containing vegetable fibers from softwood or hardwood pulp, possibly with synthetic fibers and/or possibly glass fibers, characterized in that it also contains flax fibers obtained by retting. Joint tape including the substrate.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: February 24, 2015
    Assignee: Ahlstrom Corporation
    Inventors: Audrey Vincent-Beguin, Didier Bigot, Noel Cartier, Patrice Blanc, Bertrand Rupin, Jean-Michel Santarella
  • Publication number: 20140353263
    Abstract: A coalescence media for separation of water-hydrocarbon emulsions, the coalescence media comprising an emulsion-contacting sheet formed as a single dry layer from a wet-laid process using a homogenously distributed, wet-laid furnish of (a) a mixture of fibrous components of (a1) at least one type of a first group of cellulose and/or cellulose-based fibers, and (a2) at least one type of a second group of fibers selected from the group consisting of fibrillated fibers and glass microfibers, and (b) at least one non-fibrous component selected from the group consisting of (b1) a dry strength additive, and (b2) a wet strength additive. The fibrous components of the coalescence media constitute at least about 70% of the coalescence media, and includes a pore structure sufficient to coalesce water droplets having a droplet size of <3.5 ?m in biodiesel blends or in surfactant stabilized water-hydrocarbon emulsions.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Applicant: AHLSTROM CORPORATION
    Inventors: Christine STANFEL, Frank COUSART
  • Patent number: 8871342
    Abstract: A cellulose fiber-based support of which at least one surface is coated with a layer containing at least one water-soluble polymer having hydroxyl functions, at least some of which have been reacted beforehand with at least one organic molecule that contains at least one vinylic function, characterized in that said organic molecule also has an aldehyde function. Method for production thereof.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: October 28, 2014
    Assignee: Ahlstrom Corporation
    Inventors: Menno Dufour, Diego Fantini, Gilles Gauthier
  • Patent number: 8833567
    Abstract: A coalescence media for separation of water-hydrocarbon emulsions comprises an emulsion-contacting sheet formed of: (a) at least one component of the group consisting of natural fibers, cellulose fibers, natural-based fibers, and cellulose-based fibers, at least one component of the group consisting of high-surface-area fibrillated fibers, surface-area-enhancing synthetic material, glass microfibers, and nanoceramic functionalized fibers; and (c) at least one component of the group consisting of a dry strength additive, and a wet strength additive, wherein the fibrous components of the media constitute at least about 70% of the media. In preferred embodiments, the coalescence media comprises kraft fibers, fibrillated lyocell fibers, glass microfibers or nanoceramic functionalized fibers, a wet strength additive, and a dry strength additive. Preferably, the coalescence media is formed as a single, self-supporting layer from a wet-laid process using a homogenously distributed, wet-laid furnish.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: September 16, 2014
    Assignee: Ahlstrom Corporation
    Inventors: Christine Stanfel, Frank Cousart