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.
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.
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
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.
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.
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
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.
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.
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.
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.
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.
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.
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.
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
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.
Abstract: Separation media, separation modules and methods are provided for separating water from a water and hydrocarbon emulsion and include a fibrous nonwoven coalescence layer for receiving the water and hydrocarbon emulsion and coalescing the water present therein as a discontinuous phase to achieve coalesced water droplets having a size of 1 mm or greater, and a fibrous nonwoven drop retention layer downstream of the coalescence layer having a high BET surface area of at least 90 m2/g or greater sufficient to retain the size of the coalesced water droplets to allow separation thereof from the hydrocarbon.
Type:
Grant
Filed:
April 12, 2012
Date of Patent:
June 10, 2014
Assignee:
Ahlstrom Corporation
Inventors:
Christine M. Stanfel, Farina Diani Pangestu
Abstract: Methods for manufacturing nonwovens and nonwovens obtained by such methods are provided. Particularly, nonwovens are provided with improved tactile and absorbent characteristics, which make them suitable for use in the field of surface cleaning, personal hygiene, or formation of garments. The methods are based on the use of lobed spunbonded filaments which have been treated by a thickening apparatus.
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.
Abstract: The present invention relates to a method for manufacturing nonwoven and nonwoven obtainable by said method. Particularly, the invention relates to a nonwoven provided with improved tactile and absorbent characteristics, which make it suitable for use in the field of surface cleaning, personal hygiene, or formation of garments. The method is based on the use of lobed spunbonded filaments which have been treated by means of thickening means.