Abstract: From about 50 to about 90% by weight of fibers, in particular wood fibers, and/or pellets made from cellulose or from wood, are mixed with from about 10 to about 50% by weight of a hot-curing resin, each of the percentages by weight being based on the total weight of the mixture. Instead of a single resin it is also possible to use a mixture made from two or more hot-curing resins. The mixture made from fibers and/or pellets and resin is kneaded and homogenized and then passed on to an extruder which has various heating zones in which the mixture is heated. Care has to be taken here that the maximum temperature, arising at the extruder exit, does not exceed about 120° C., since above this temperature the resin(s) begin(s) to cure.
Abstract: A smooth-textured non-woven, superabsorbent particle-impregnated fibrous structure is disclosed. The web exhibits an improved smooth surface texture. The structure contains from 50% to 80% of ion sensitive SAP having a particle size of less than 200 microns, wood pulp fibers and cellulose acetate fibers, each in preferred specified amounts indicated herein. The superabsorbent, ion sensitive polymer particle-impregnated fibrous structure is made from an aqueous, wet-lay process in which an aqueous furnish comprises solids of fibers and superabsorbent, ion sensitive polymer and dissolved salt, such as preferably, Na2SO4. The furnish is passed over a moving foraminous support, such as a Fourdrinier wire, and a wet web structure is formed, followed by drying.
Abstract: Low-density uncreped through-air-dried webs containing bleached chemithermomechanical pulp fibers and a wet-strength resin are calendered to significantly increase density and reduce caliper. When wetted, these webs substantially return to their original caliper and density and substantially regain their original fluid-handling characteristics. Consequently these webs are very thin when dry and thick when wet. They can be used for a wide variety of applications, including paper towels, wipers and fluid-handling components for infant care and personal care products.
Type:
Grant
Filed:
March 13, 1998
Date of Patent:
August 14, 2001
Assignee:
Kimberly-Clark Worldwide, Inc.
Inventors:
David Henry Hollenberg, James Ellis Horton, Jr., Andrew Michael Lake
Abstract: This invention relates to compositions, paper, thermoplastic sheets, and medical paper containing cellulose ester, alkylpolyglycoside (APG) or a mixture of APG and polyether glycol, and, optionally, cellulose. The process of incorporating APG or a mixture of APG and polyether glycol in paper composed of cellulose ester fibers and cellulose fibers and to calendaring of such paper is also disclosed.
Type:
Grant
Filed:
November 30, 1998
Date of Patent:
July 31, 2001
Assignee:
Eastman Chemical Company
Inventors:
Charles Michael Buchanan, Eric Eugene Ellery, Matthew Davie Wood
Abstract: Methods for making high wet performance webs. A polymeric anionic reactive compound is applied to a cellulosic fibrous web followed by flash curing of the compound to crosslink the cellulose fibers. The resulting tissue has high wet resiliency, high wet strength, and a high wet:dry tensile strength ratio.
Abstract: Provided is a multi-layered water-decomposable fibrous sheet with a plurality of layers each having a different fibrous constitution being integrated, including a top layer on a top surface and a back layer on a back surface. The top layer includes fibrillated rayon of at least 3% by mass of all fibers constituting the top layer. The fibrillated rayon has a degree of beating of at most 700 cc, and has primary fibers of a predetermined fiber length and microfibers extending from the primary fibers. The microfibers are entangled with and/or hydrogen-bonded to at least either of other microfibers and other fibers. The back layer includes fibers containing no fibrillated rayon, the fibers entangled with and/or hydrogen-bonded to each other, or the back layer includes the fibrillated rayon in an amount smaller than that in the top layer. The microfibers of the fibrillated rayon are entangled with and/or hydrogen-bonded to at least either of other microfibers and other fibers.
Abstract: This invention relates to compositions, paper, thermoplastic sheets, and medical paper containing cellulose ester alkylpolyglycoside (APG) or a mixture of APG and polyether glycol, and, optionally, cellulose. The process of incorporating APG or a mixture of APG and polyether glycol in paper composed of cellulose ester fibers and cellulose fibers and to calendaring of such paper is also disclosed.
Type:
Grant
Filed:
November 30, 1998
Date of Patent:
May 8, 2001
Assignee:
Eastman Chemical Company
Inventors:
Charles Michael Buchanan, Eric Eugene Ellery, Matthew Davie Wood
Abstract: A water-disintegratable cleaning sheet consisting of a fibrous sheet having incorporated thereinto, a binder of alkylcellulose; an electrolyte, and (a) a copolymer of a polymerizable acid anhydride and other compounds and/or (b) an amino acid. The water-disintegratable cleaning sheet has excellent water disintegratability and wet strength and further it is not degraded in the water disintegratability and wet strength after storage at high temperatures.
Abstract: An aqueous formulation of a high solid content fully functional thermosettable wet strength resin designed for use in the manufacture of paper products is disclosed. The wet strength resin is the product of reaction of an epihalohydrin and an end-capped polyaminamide polymer. The thermosetting wet strength resins are useful in the manufacture of improved absorbent paper products such as bathroom tissues, facial tissues, napkins, towels, and paperboard products such as dairy cartons and bag paper.
Abstract: Granular absorbent products with low amounts of paper fiber are described. The absorbent products are made from recycled paper and include less than about 10% of paper fibers having a length sufficient to be retained on a 100 mesh screen. A process for making such granular absorbent products is also provided. The granular absorbents are useful for absorbing liquids spilled on the floor, and are crushable when walked on to provide greater resistance to slipping, and yet have a high resistance to attrition.
Type:
Grant
Filed:
July 20, 1999
Date of Patent:
April 10, 2001
Assignee:
Marcel Paper Mills, Inc.
Inventors:
Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer
Abstract: The invention relates to an imaging element comprising a base comprising a cellulose fiber containing paper, wherein said paper has a tear resistance of between 200 and 1800 Newton.
Type:
Grant
Filed:
September 9, 1999
Date of Patent:
March 27, 2001
Assignee:
Eastman Kodak Company
Inventors:
Sandra J. Dagan, Peter T. Aylward, Robert P. Bourdelais
Abstract: This invention relates to compositions, paper, thermoplastic sheets, and medical paper containing cellulose ester, alkylpolyglycoside (APG) or a mixture of APG and polyether glycol, and, optionally, cellulose. The process of incorporating APG or a mixture of APG and polyether glycol in paper composed of cellulose ester fibers and cellulose fibers and to calendaring of such paper is also disclosed.
Type:
Grant
Filed:
November 30, 1998
Date of Patent:
February 27, 2001
Assignee:
Eastman Chemical Company
Inventors:
Charles Michael Buchanan, Eric Eugene Ellery, Matthew Davie Wood
Abstract: An absorbent cellulose product includes cellulose fibers which are cross-linked by reaction with an effective quantity of one or more water-soluble polymers which are produced in advance, which have an average molecular weight of between 350 and 70,000 g/mol, and which possess free acid or aldehyde groups. When the product is being prepared, the cellulose fibers are impregnated with the polymers in aqueous solution. The impregnated substance is dried and defibered at the latest after drying, after which the defibered cellulose fibers are cross-linked in the dry state by means of heating the impregnated, dried and defibered cellulose product.
Type:
Grant
Filed:
January 5, 1998
Date of Patent:
January 23, 2001
Assignee:
Stora Kopparbergs Bergslags Aktiebolag (PUBL)