Jwi Ltd.

Astenjohnson, Inc.

Other

Samuel M Baker

Dietmar Wirtz

Rex Barrett

Larry Anderson

Bud J Chase

Bruce W Janda

Ian Gerald Lang

James D Harrison

Eugene Z Fekete

Girish M Bhatt

F Brian Best

Marc P Despault

Graham W Jackson

Rajat K Chakravarty

Kurt Wiebe

Paul C Fleri

Jackson Graham

Eugene Fekete

A fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the equipment or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.

Fabric with contaminant resistant nanoparticle coating and method of in situ application

A papermaking fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter in the papermaking system. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device in the dryer section to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the dryer section or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.

Papermaking fabrics with contaminant resistant nanoparticle coating and method of in situ application

A method of manufacturing a cellulosic sheet having at least one of hydrophobic and oleophobic properties comprises the steps of depositing a stock of cellulosic fibers onto at least one forming fabric at an impingement zone and forming a web therefrom in a formation process; combining a water-based composition comprising an adhesion promoter, an organic nanoparticulate polymer and a fluorocarbon with the web at a preselected combination stage prior to a heating stage at which the web is subjected to a temperature exceeding 60&#xb0; C.; and heat-curing the composition with the web during a drying process. A water-based composition for imparting at least one of hydrophobic and oleophobic properties to a cellulosic sheet during manufacture comprises an adhesion promoter, an organic nanoparticulate polymer and a fluorocarbon. A cellulosic sheet or layer thereof has at least one of hydrophobic and oleophobic properties. Improved resistance of cellulosic sheets to oil or water is obtained.

Sheet-like products exhibiting oleophobic and hydrophobic properties

A polymer blend consisting essentially of 80% to 95% by weight, based on the total weight of the composition, of polytrimethylene terephthalate and from 5% to 20% of an elastomeric polyester. Fibers and extrusions produced from the polymer blend are durable under repetitive compressive stresses, exhibit mechanical properties comparable to neat polyamide-6, and provide moisture stability similar to yarns and extrusions comprised of polyamide-6/10 or polyamide-6/12. These fabrics find use as forming fabrics, and press felt fabrics for paper making machines.

Polymer blends of trimethylene terphthalate and an elastomeric polyester

A substantially planar jointed multi-layer industrial fabric, assembled from at least one segment comprising at least one woven or nonwoven ply, in which the joints utilize jointing yarns or formed structures. The jointing yarns or formed structures are placed at selected locations, such as the lateral edges, of at least one planar surface of a ply of the at least one, or first, fabric segment, and interlock in mating engagement with corresponding jointing yarns or formed structures either in at least one surface of a ply of a second segment, or in another location on the first fabric segment, to provide an integral joint. The joints are comprised of shaped yarns and formed structures which in any combination form mating engagements substantially within the plane of the fabric, such as in hook-and-loop or slot-and-rib type joints, and the like. The fabric is assembled by engaging and interlocking the jointing yarns or formed structures, for example by overlapping the segments, in either a spiral winding process or piecewise fashion, so that the jointing yarns or structures provided in the segment ply are engaged and interlocked. Further secondary processing of the joint is not required. The at least one segment may be a single continuous strip, a plurality of strips, or panels, into which the jointing structures have been incorporated.

Multi-ply industrial fabric having integral jointing structures

A multilayer porous fabric which comprises a porous core fabric provided with hook means, and at least one layer of pre-needled nonwoven fibrous batt attached by entanglement onto the hook means by pressing the core fabric and batt together. The entanglement is sufficient to anchor the batt reliably to the core fabric, so that the multilayer fabric is ready for use without further processing. The porous core fabric may be formed by weaving or as an extruded sheet, with a plurality of suitably located hook means structures on at least one of its surfaces. The hook structures engage with and entangle sufficient fibers from the pre-needled nonwoven batt to provide adequate attachment preventing the batt from separating from the core fabric enabling the multilayer fabric to be handled before use, for example for installation in a papermaking machine press section. The batt is pre-needled to a desired density before attachment to the core fabric. In many circumstances, compressive loads applied to the porous fabric serve to enhance and improve the level of entanglement of the batt onto the hook means.

Multilayer porous fabric

A flat woven, pin seamed, papermakers' fabric, comprising primary warp monofilament yarns, primary weft monofilament yarns and secondary weft monofilament yarns located between and adjacent to the primary weft yarns. The secondary weft yarns are located beneath, and in contact with, the primary warp. The thickness and width of the secondary weft yarns are chosen at the weaving stage so as to control finished fabric air permeability and increase the paper side surface contact area. The fabrics are of a lower caliper, and provide increased cross direction stiffness at lower yarn counts. Formation of the pintle receiving loop yarns in a low marking woven back pin seam, or of a streamline seam, is also facilitated, without compromising fabric properties, by selection of the appropriate dimensions of the secondary weft yarns. The fabrics are woven using either round or flattened primary warp yarns, and either round or flattened monofilament primary weft yarns, or a combination thereof, according to any weave pattern which provides for floats of the primary warp yarns that extend over two or more adjacent primary weft.

Low air permeability papermaking fabric seam

Paper machine dryer fabrics containing hollow monofilaments

A dryer fabric for use in a dryer section of a paper machine wherein at least a portion of the machine direction components are monofilaments made from polyphenylene sulphide or a blend of polyphenylene sulphide and heat-stabilized polyamide 66. When using a blend the polyamide 66 is present in the range of up to about 20% by weight.

Dryer fabric having warp strands made of melt-extrudable polyphenylene

A heat set paper machine fabric having at least a portion of its wear resisting surface composed of cross-linked high density high molecular weight polyethylene.

Growing community of inventors

Carleton Place, Canada

Samuel M Baker