Cellulosic Next To Another Cellulosic Patents (Class 428/534)
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Patent number: 6428881Abstract: Described and claimed are mat boards and backing boards buffered to a pH greater than 7.0 and having as an outer layer a vapor barrier and protective material such as PET, PBT, co-PBT co-PET and mixtures thereof, as well as methods for making and using such matboards and backing boards.Type: GrantFiled: September 17, 1999Date of Patent: August 6, 2002Assignee: Rupaco Paper CorporationInventor: David Zucker
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Patent number: 6403787Abstract: The present invention relates to evenly substituted polysaccharide derivatives having the general structure: polysaccharide—O—R wherein polysaccharide—O represents a substituted or unsubstituted polysaccharide unit and R is a substituent of a polysaccharide-OH group having either the structure R=—A—B— or the structure R=—B—, wherein A is a linear polyether chain having the following structure: A=(—D—O—)n wherein D denotes a linear aliphatic branched or unbranched chain having 2 to 12 C atoms, O represents an oxygen atom and n is a number equal to or greater than 1, and B represents a substituted carbamic acid having the structure wherein E denotes a linear or branched aliphatic chain having 1 to 18 C atoms.Type: GrantFiled: April 2, 1997Date of Patent: June 11, 2002Assignee: Wolff Walsrode AGInventors: Jürgen Engelhardt, Joachim Simon, Hanns-Peter Müller, Rainhard Koch, Dirk-Jacques Dijkstra
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Patent number: 6387528Abstract: The present invention provides a composition comprising an ion-trigger polymer coating joined to a water-sensitive substrate. When the composition is employed as a diaper outercover or a pantiliner baffle, for example, the ion-trigger coating is oriented toward the body and is exposed to bodily fluids. The coating inhibits the transport of the fluids to the inner, body-side water-sensitive substrate, maintaining the structural integrity of the composition. When the entire article is disposed of in a large volume of water, such as in the hydraulic flow of a toilet, both the water-sensitive substrate layer and the ion-trigger polymer coating layer mechanically weaken and break apart into small pieces.Type: GrantFiled: October 27, 1999Date of Patent: May 14, 2002Assignee: Kimberly-Clark Worldwide, Inc.Inventors: William S. Pomplun, John E. Kerins, Pavneet S. Mumick
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Patent number: 6365667Abstract: Synthetic polymers having hydrogen bonding capability and one or more aliphatic hydrocarbon moieties are capable of providing two distinct properties to paper products, such as tissues, which properties heretofore have been imparted through the use of at least two different molecules. The backbone of these synthetic polymers is based on modified vinyl polymers, such as polyvinyl alcohol, polyacrylamides and polyacrylic acids.Type: GrantFiled: August 21, 2000Date of Patent: April 2, 2002Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Thomas Gerard Shannon, Daniel Arthur Clarahan, Mike Thomas Goulet, Wen Zyo Schroeder
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Publication number: 20020018907Abstract: A multilayer synthetic wood component comprised of a layer of a first synthetic wood composition that is secured to a layer of a second synthetic wood composition. As a result, the present invention may provide a component that utilizes the beneficial characteristics of each of the compositions. For instance, the component can have an improved combination of appearance, strength, durability, weight, weatherability, and other characteristics. Moreover, the present invention enables the ingredients of each layer to be tailored to the particular application. Consequently, certain ingredients can be conserved, thereby reducing the cost and/or the weight of the component.Type: ApplicationFiled: May 14, 2001Publication date: February 14, 2002Inventor: Burch E. Zehner
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Patent number: 6207265Abstract: A water soluble, non-ionic masking agent is used in the manufacture of printed circuit boards. The masking agent masks portions of the circuit board to prevent adhesion of solder, flux and the like. The masking agent includes a water soluble non-ionic binder resin, a cellulosic non-ionic filler, a non-ionic surfactant, at least one non-ionic associative thickener, and deionized water. The masking agent material is readily removed from the circuit board after manufacture and does not render further wash water processing ineffective. The masking agent is non-ionic, and thus does not agglomerate or clump downstream ion-exchange or filtration media.Type: GrantFiled: September 24, 1999Date of Patent: March 27, 2001Assignee: Illinois Tool Works Inc.Inventors: John W. Holdren, II, Eric Martini
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Patent number: 5962123Abstract: A decorative laminate comprising a decorative paper sheet and a plurality of resin impregnated sheets wherein color is incorporated into said decorative paper sheet as non-resin impregnated paper chips or one or more colors.Type: GrantFiled: June 6, 1996Date of Patent: October 5, 1999Assignee: The Mead CorporationInventors: Mahendra Mehta, Richard D. Brownhill, John H. Bantjes, William M. Stanard
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Patent number: 5939209Abstract: Sorghum millet stalks are defibrated and refined into fibers, after which, a cohesive material is admixed with such sorghum millet fibers so as to provide a lump of initially cohered sorghum millet fibers, which is then shaped in the form of a mat. This mat is subjected to a press working process so that a desired shape or uneven shape of panel is produced. During the press working process, the cohesive material is compressed and changed into a state where is acts as a bonding agent to strongly cohere the sorghum millet fibers integrally together. Together with the cohesive material, a bonding material may be admixed with the sorghum millet fibers. Thus, it is possible to obtain a sorghum millet fiber panel which has a strength enough for usual use as with other panels and boards.Type: GrantFiled: April 22, 1997Date of Patent: August 17, 1999Assignees: Tachi-S Co., Ltd., Howa Textile Industry Company LimitedInventors: Fumio Shibuya, Yasushi Shibuya
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Patent number: 5928777Abstract: A high pressure laminate is made of several layers of paper, including from bottom to top core sheets, a decor sheet and an overlay sheet. The core sheets are either composed of cellulose fibers or composed of 30 to 90 weight percent cellulose acetate fibers and 70 to 10 weight percent cellulose fibers. The core sheets are respectively coated with either a lamination polymer or a plasticizer. The decor sheet is composed of a mixture and a conventional amount of paper making dye. The mixture comprises 30 to about 90 weight percent cellulose acetate fibers, 10 to 70 weight percent cellulose fibers and 0 to 20 weight percent fillers. The decor sheet is coated with a plasticizer. The overlay sheet is composed of cellulose fibers and is coated with a lamination polymer. Upon application of heat and pressure to the several layers a laminate is formed having thermoplastic properties, improved postformability and a significant reduction in the release of volatile organics during formation.Type: GrantFiled: March 23, 1998Date of Patent: July 27, 1999Assignee: Eastman Chemical CompanyInventors: Stephen Todd Cox, Melvin Glenn Mitchell, Paul Jay Kennedy, Guy Fostine Massie, Jr., Freddie Wayne Williams
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Patent number: 5885719Abstract: The invention relates to an impregnated sheet. It is impregnated with a composition containing, as a mixture, a crosslinkable polymer having a glass transition temperature of between -10.degree. and 35.degree. C., used in the form of a stable aqueous dispersion, other than a styrene/ethyl acrylate/butyl acrylate copolymer, and a water-soluble binder. According to the invention, the water-soluble binder is chosen from poly(vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and mixtures thereof. Application to laminated decorative coverings.Type: GrantFiled: June 20, 1996Date of Patent: March 23, 1999Assignee: Arjo Wiggins S.A.Inventor: Claude Perrin
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Patent number: 5846662Abstract: A mold release liner for a heated pressure mold for making products such as printed circuit boards is made utilizing two or more wet-laid fiber layers of cellulose or cellulose derivative fibers (such as wood, cotton, cellulose acetate, or rayon fibers, or mixtures of these). The first layer has a sufficiently low density so that it acts as a cushion and absorbs deformation when used as a release liner in the mold (typically it has a thickness of between 8-250 mils, most desirably 40-90 mils, and a basis weight of about 25-350 pounds per ream, most desirably 130-160 pounds per ream). A second layer is of much higher density than the first layer and readily releases from the molds, for example comprising condenser tissue or a similar product, having a thickness of between 0.5-10 mils and a basis weight of 4-50 pounds per ream of 500 sheets. The first and second layers are in face-to-face engagement with each other, and may be adhesively laminated together with sheet, spray, liquid, or powder adhesive.Type: GrantFiled: May 15, 1997Date of Patent: December 8, 1998Assignee: Ahlstrom Filtration, Inc.Inventors: John S. Baumgardner, deceased, Merle W. Barclay
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Patent number: 5837376Abstract: Improvements in the construction of postformable laminates are disclosed by the provision of a single high basis weight sheet exhibiting improved saturation and resin pick up characteristics and formed predominantly of hardwood pulp which pulp has been mechanically treated to effectively impart kinking and curling to the individual pulp fibers.Type: GrantFiled: December 21, 1995Date of Patent: November 17, 1998Assignee: Westvaco CorporationInventors: David E. Knox, Edward P. Klein, Robert C. Streisel, Stanley M. Nuzum
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Patent number: 5716690Abstract: A composite furniture leg includes an elongate molded core body having outer and inner sides, a hard wood reinforcing block embedded in a top part of the core body at the inner side of the core body, an outer laminate shell layer for covering the outer side of the core body, and an inner wood cover layer for covering the inner side of the core body. The core body, the outer shell layer and the inner cover layer are hot pressed to form the furniture leg.Type: GrantFiled: December 8, 1995Date of Patent: February 10, 1998Inventor: Don-Fong Yeh
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Patent number: 5709931Abstract: A mold release liner for a heated pressure mold for making products such as printed circuit boards is preferably made without polymer films or chemical release agents utilizing two or more wet-laid fiber layers of cellulose or cellulose derivative fibers (such as wood, cotton, cellulose acetate, or rayon fibers, or mixtures of these). The first layer has a sufficiently low density so that it acts as a cushion and absorbs deformation when used as a release liner in the mold (typically it has a thickness of between 8-250 mils, most desirably 40-90 mils, and a basis weight of about 25-350 pounds per ream, most desirably 130-160 pounds per ream). A second layer is of much higher density than the first layer and readily releases from the molds, for example comprising condenser tissue or a similar product, having a thickness of between 0.5-10 mils and a basis weight of 4-50 pounds per ream of 500 sheets.Type: GrantFiled: August 9, 1995Date of Patent: January 20, 1998Assignee: Ahlstrom Filtration Inc.Inventors: John S. Baumgardner, Merle W. Barclay
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Patent number: 5683662Abstract: A preservation article for the preservation of an archival article, wherein the preservation article includes a molecular sieve which is organophilic, hydrophobic or acid-resistant. A method of preserving an archival article which involves providing a preservation article in proximity to an archival article, wherein the preservation article includes a molecular sieve which is organophilic, hydrophobic or acid-resistant. The preservation article may be coated on or incorporated into a container, a packaging material, a support for an archival article or the archival article itself.Type: GrantFiled: June 5, 1995Date of Patent: November 4, 1997Assignee: Conservation Resources International, Inc.Inventor: William K. Hollinger, Jr.
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Patent number: 5670238Abstract: A composite laminate member includes outer layers of a polymer cellulose material sandwiched about a core of corrugated cardboard, the core of corrugated cardboard having flutes running in a plane parallel to the outer layers. An exemplary embodiment includes a filter medium separator for use in air filter constructions including a composite laminate member comprising outer layers of a polymer cellulose material and a fire retardant additive sandwiched about a core of corrugated cardboard.Type: GrantFiled: June 14, 1995Date of Patent: September 23, 1997Assignee: Anderson & Middleton CompanyInventors: Gary L. Earl, William A. Goodwin
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Printed decorative paper having a three dimensional pattern and a process for the production thereof
Patent number: 5665457Abstract: Printed decorative paper having a three dimensional pattern comprises base paper 1, a printed design layer 2 formed of a water-based ink as an undercoat on a surface of the base paper, an overlying printed design pattern layer 3 formed of a water-based curable ink containing a repellent in harmony with said pattern in the undercoat, and overlying water-based curable topcoat 4 applied to the entire surface of the base paper in such a way that said topcoat in the areas where said printed design pattern layer 3 is formed is repelled to form concavities 5. This printed decorative paper is environment friendly due to the non-use of organic solvents, is enhanced in durability as a interior decor material and can be produced with high efficiency.Type: GrantFiled: July 17, 1995Date of Patent: September 9, 1997Assignees: Toppan Printing Co., Ltd, Toyo Ink Manufacturing Co. Ltd.Inventors: Tohru Sato, Yoshimi Yoshida, Fumio Watanabe -
Patent number: 5633054Abstract: A layered material containing a buffer and optionally containing an adsorbent. The material may also include a vapor barrier. The material is used for the preservation of archival documents and objects.A container configured to permit the long term storage of documents without slippage of the documents or resulting deformation may also be made from the material.Type: GrantFiled: March 30, 1992Date of Patent: May 27, 1997Assignee: Conservation Resources International, Inc.Inventor: William K. Hollinger, Jr.
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Patent number: 5631078Abstract: A thermoplastic film is comprised of an admixture of 20 to 85 weight percent cellulose ester fibers and 80 to 15 weight percent cellulose fibers and a functional amount of a cellulose ester plasticizer. The film has an opacity in the range of 10 to 85 percent, a thickness in the range of 0.002 to 0.010 inch, a porosity in the range of 0.0 to 50 ml/min/cm.sup.2 at a 1.0 centibar pressure drop and a compostability of less than 65 days fragmentation. The film is prepared by making a paper comprised of 20 to 85 weight percent cellulose ester fibers and 80 to 15 weight percent cellulose fibers and saturating the paper with a functional amount of a cellulose ester plasticizer. The saturated paper is subjected to heat and pressure for a period of time to obtain the thermoplastic film. The thermoplastic film is prepared without the use of solvents and is economically attractive since it is compatible with conventional paper printing materials and techniques.Type: GrantFiled: October 30, 1995Date of Patent: May 20, 1997Assignee: Eastman Chemical CompanyInventors: Eric E. Ellery, Melvin G. Mitchell, Charles K. Crosswhite, Donald W. Monk
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Patent number: 5601930Abstract: A decor sheet for use in decorative laminates wherein the sheet is treated with a sizing agent to reduce its capacity for a laminating resin and enhance its opacity; in a preferred embodiment, the resin-impregnated decor sheet exhibits a resin gradient in the thickness direction to provide a decor sheet having a resin-rich top layer and a resin-starved bottom layer; in accordance with a preferred embodiment, the resin gradient is achieved by differentially sizing the bottom versus the top surface of the decor sheet; a decorative laminate employing such decor sheets are described.Type: GrantFiled: February 15, 1995Date of Patent: February 11, 1997Assignee: The Mead CorporationInventors: Mahendra Mehta, Larry O. Hill
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Patent number: 5593625Abstract: Fiber-reinforced protein-based biocomposite particulate material containing a legume-based thermosetting resin and cellulosic material, and rigid biocomposite pressure-formed materials produced therefrom, are provided. The particulate material and resultant pressure-formed materials contain the legume-based resin and fibrous cellulosic material in amounts such that the ratio of cellulose solids to resin solids is about 0.8:1.0 to about 1.5:1.0. Particularly preferred pressure-formed materials also include a secondary thermosetting binder, such as an isocyanate.Type: GrantFiled: June 10, 1994Date of Patent: January 14, 1997Assignee: Phenix Biocomposites, Inc.Inventors: Michael J. Riebel, Paul L. Torgusen, Kenneth D. Roos, Donald E. Anderson, Carl Gruber
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Patent number: 5580922Abstract: The invention is directed to a composition of matter useful as a paper impregnant, to the method of its use, and to the products produced by the method. Poly (diphenylmethane diisocyanate) or PMDI has been used in the past as a paper impregnant with or without propylene carbonate as a diluent. These products have generally required pressing under high pressures and at elevated temperatures. It has now been found that triacetin and/or triethyl citrate in usages up to about 20% of PMDI give superior performance in impregnated products. The modified PMDI will cure at essentially ambient conditions in times as short as 1-2 days to insoluble polyureas with low residual amounts of isocyanates and reaction byproducts such as 4,4'-diaminodiphenylmethane. The treated papers can be used in applications of which skins for sandwich panels and high strength corrugated board would be exemplary.Type: GrantFiled: June 6, 1995Date of Patent: December 3, 1996Assignee: Weyerhaeuser CompanyInventors: David W. Park, Frank R. Hunter
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Patent number: 5560996Abstract: Color images with high fixation comparable to that of silver salt photographic images are formed on printing papers, using aqueous ink compositions by ink jet recording. Color images thus formed have high saturation and high resolution. An intercalated compound capable of fixing water-soluble dyes to a printing paper due to the intercalation based on ion-exchanging between them is incorporated into the dye-receiving layer 2 of the paper, on which color images are formed by ink jet recording using an aqueous ink composition containing a water-soluble dye. The content of the intercalated compound in the layer 2 is from 10 to 90% by weight. As the intercalated compound, montmorillonoids are preferred when water-soluble cationic dyes are used while hydrotalcite-group minerals are preferred when water-soluble anionic dyes are used. FIG. 1 is selected.Type: GrantFiled: July 7, 1994Date of Patent: October 1, 1996Assignee: Sony CorporationInventors: Kengo Ito, Yoshio Fujiwara
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Patent number: 5558923Abstract: The invention concerns a package padding and an apparatus for forming same. The package padding is continuous and web-like and formed of superimposed paper courses (1,2,3). On the substantial surface area of one paper course (2) has with a pair of shaping rolls (16,17) been embossed a cellular padding structure. The package padding comprises a punch joint region (5) formed with the aid of a pair of punch joint rolls (18,19), and an intact area (7) substantially free of punchings, the package padding being more bulky and fluffy in the region thereof than in the punch joint region (5). In the embossed paper course (2) have by means of the speed differential of the punching rolls (18,19) and the shaping rolls (16,17) been folded pleats (8) so that the package padding contains per unit length of the package padding a greater length of paper material of the second paper course (2) than of paper material of the first paper course (1).Type: GrantFiled: October 20, 1994Date of Patent: September 24, 1996Assignee: Mercamer OyInventor: Jussi Vesamaa
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Patent number: 5545449Abstract: Polyether-reinforced fiber-based materials, and methods for their manufacture, are disclosed. A representative material is a sheetlike ply having on one or both faces thereof a polyether-impregnated stratum extending depthwise into the ply thickness dimension no greater than about one-half the ply thickness dimension so as to leave a portion of the ply thickness dimension unimpregnated with polyether. The materials can comprise plural superposed plies wherein at least one ply has at least one polyether-impregnated stratum, such as polyether-reinforced corrugated paperboard. The polyether-reinforced materials have excellent compression strength and foldability. Each polyether-reinforced stratum is made by controllably applying a low-viscosity liquid mixture of an epoxy resin and a hardener, wherein the epoxy resin is substantially non-prepolymerized, to a fibrous web surface, then curing the resin mixture.Type: GrantFiled: March 12, 1992Date of Patent: August 13, 1996Assignee: Weyerhaeuser CompanyInventor: George T. Tiedeman
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Patent number: 5498469Abstract: A thin panel consisting essentially of a compressed non woody lignocellulosic material and a binder. The thin panel has a thickness of less than about 0.10 inch (2.54 mm), preferably between about 0.06 inch (1.6 mm) and about 0.10 inch (2.54 mm). The preferred binder is a polyisocyanate. The non-woody lignocellulosic material may be straw, bagasse, hemp, flax shives or jute sticks. The preferred non-woody lignocellulosic materials are selected from the group consisting of straw and bagasse. The bagasse may be substantially non-depithed. The thin panel is useful as core stock in plywood.Type: GrantFiled: December 2, 1994Date of Patent: March 12, 1996Inventors: Robert E. Howard, Karl E. Kaser
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Patent number: 5456964Abstract: A laminated material comprises a plurality of straight portions of vegetable stalks, each having an epidermis mainly of lignocellulose and a porous core. These vegetable stalks straight portions are impregnated with a thermal hardener solution of high-molecularizable liquid compound, resinified liquid, or mixtures thereof, arranged in parallel to form a layer of a sheet-like material, piling these sheet-like materials and pressing them to make these layers come to contact closely in flat condition. It is possible to make the directions of vegetable stalks in the sheet-like material different from the neighboring layers in order to strengthen a bending strength and other physical strength of the piled multi-layer laminated material, such as a pillar-like laminated material. Such pillar-like material is made by using a pair of pressing female mold and male mold, vegetable stalks being placed in the female mold and hot-pressed.Type: GrantFiled: June 8, 1994Date of Patent: October 10, 1995Assignee: Koyo Sangyo Co., Ltd.Inventors: Yasuo Tamura, Ryoji Tanaka, Takahiko Gohma, Mitsumasa Horikawa
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Patent number: 5443902Abstract: Improvements in the construction of postformable laminates are disclosed by the provision of a single high basis weight, high coarseness, high kappa number sheet formed predominantly of softwood pulp, preferably southern loblolly pine, which pulp has been treated in a mechanical device that effectively imparts kinking and curling to the individual pulp fibers. The sheet is intended as a replacement for the highly extensible sheet(s) currently located on the back of the laminate farthest away from the core.Type: GrantFiled: January 31, 1994Date of Patent: August 22, 1995Assignee: Westvaco CorporationInventors: David E. Knox, J. Donato Fortin, Harold L. Hintz
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Patent number: 5438030Abstract: Dye-donor element for use according to thermal dye transfer methods, said element comprising a dye layer comprising at least one tricyanovinylaniline dye, wherein the amino group of the aniline function of said dye carries an aryl group and a hydrocarbon or substituted hydrocarbon group linked by a secondary carbon atom to said amino group. The dyes have very good light-fastness and good spectral absorption characteristics.Type: GrantFiled: October 20, 1993Date of Patent: August 1, 1995Assignee: Agfa-Gevaert, N.V.Inventors: Luc Vanmaele, Wilhelmus Janssens
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Patent number: 5434011Abstract: A method for manufacturing a peat moss board suitable for use as an absorbent core in structures for absorbing body exudate. The method is characterized by conditioning a wet laid board to a specific water content and calendering the conditioned board at a predetermined pressure. The water content and the calendering pressure determine the density of the peat moss board in final form. The invention also extends to a peat moss board manufactured by the novel method.Type: GrantFiled: December 13, 1991Date of Patent: July 18, 1995Assignee: Johnson & Johnson Inc.Inventor: Martin Roy
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Patent number: 5418034Abstract: The present invention is a veneer laminate comprising a first veneer sheet as one surface, a second veneer sheet as the other surface of the laminate with its grain running substantially parallel to the grain of the first sheet, and a sheet of paper of a width of substantially the same width as the first and second veneer sheets bonded to the inner surface of each of the veneer sheets. The fibers of the veneer sheets in a direction substantially normal to the grain of said veneer sheets are broken at spaced intervals sufficient to permit the flexing of the laminate about a tight radius of an object of less than about 90.degree..Type: GrantFiled: September 30, 1992Date of Patent: May 23, 1995Assignee: Formwood Industries, Inc.Inventor: Charles B. McGuire, III
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Patent number: 5395689Abstract: A photographic support material with a coating on each side. At least one of the coatings comprises a mixture of polyolefins and optional agents that have a positive effect on the utilization of the support material. A white pigment is an example. The polyolefin mixture comprising the coating contains at least one copolymer of an .alpha.-olefin with an .alpha., .beta.-unsaturated carboxylic acid. At least 5% and preferably 20% to 80% by weight of the mixture is copolymer.Type: GrantFiled: December 6, 1993Date of Patent: March 7, 1995Assignee: Felix Schoeller jr Foto- und Spezialpapiere GmbH & Co. KGInventor: Ralf-Burkhard Dethlefs
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Patent number: 5374470Abstract: A support for photographic photosensitive materials which consists essentially of a magnetic recording layer, a cellulose ester layer and an intermediate layer provided between the magnetic recording layer and the cellulose ester layer consisting essentially of a polymer of which the solubility in a solvent for separation is different from the cellulose ester of the cellulose ester layer. According to the support of the invention, the magnetic recording layer is very easily separated from the cellulose ester layer, and they can easily be recycled. Moreover, magnetic properties of the support are improved.Type: GrantFiled: September 30, 1992Date of Patent: December 20, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadahiro Tsujimoto, Yoshio Sakakibara, Morio Hashimoto
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Patent number: 5345738Abstract: An insulating sheathing panel has an insulating core, such as foam, sandwiched between PMDI impregnated cover sheets. The resulting panels offer structural reinforcement as well as insulating qualities to a building framework.Type: GrantFiled: April 26, 1993Date of Patent: September 13, 1994Assignee: Weyerhaeuser CompanyInventor: Alkiviadis G. Dimakis
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Patent number: 5310587Abstract: Provided are wrappings for foods comprising a laminated composite sheet which comprises an impermeable sheet, an absorbent fiber sheet and a hydrophobic fiber sheet, said hydrophobic fiber sheet having a water resistance of at least 5 cmH.sub.2 O and an air permeability of at least 10 c/cm.sup.2 /sec. Also provided are bags and boxed fabricated from the above wrappings.These wrappings are microwaveable and have heat insulation property.Type: GrantFiled: February 14, 1991Date of Patent: May 10, 1994Assignee: Kuraray Co., Ltd.Inventors: Kouji Akahori, Hiroshi Kanehira
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Patent number: 5280097Abstract: A laminated product has an organic polymer layer on at least one surface of a substrate of cellulosic material impregnated with polyisocyanate. The substrate is preferably made from substantially delignified cellulosic material and an isocyanate resin. The isocyanate resin comprises a polyisocyanate, preferably PMDI, and may include a miscible organic solvent, preferably one such as propylene carbonate having a high boiling point and low flammability and toxicity. The substrate may be cured with an uncured overlay sheet positioned on the cured substrate and then cured to bond the substrate and overlay. Alternatively, a cured overlay may be adhesively or otherwise secured to a previously cured substrate. As yet another alternative, an uncured overlay sheet and uncured substrate may be placed in position and simultaneously cured. An overlay may be positioned on one or both major surfaces of a substrate sheet.Type: GrantFiled: June 8, 1992Date of Patent: January 18, 1994Assignee: Weyerhaeuser CompanyInventors: Frank R. Hunter, James F. L. Lincoln, David W. Park
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Patent number: 5230933Abstract: Acid resistant peeling aid compositions and casings, particularly tubular cellulosic food casings, coated therewith, which compositions contain a water-soluble cellulose ether, dextrin and optionally lecithin.Type: GrantFiled: July 11, 1990Date of Patent: July 27, 1993Assignee: Viskase CorporationInventors: Patrick B. Apfeld, Frederick M. Merritt, II
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Patent number: 5220760Abstract: An insulating sheathing panel has an insulating core, such as foam, sandwiched between PMDI impregnated cover sheets. The resulting panels offer structural reinforcement as well as insulating qualities to a building framework.Type: GrantFiled: March 22, 1991Date of Patent: June 22, 1993Assignee: Weyerhaeuser CompanyInventor: Alkiviadis G. Dimakis
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Patent number: 5143780Abstract: The present invention relates to methods to protect curing cement or concrete from excess evaporative water loss and/or from rain, excess heat loss, or excess heat gain. More particularly the method relates to coating curing cement or concrete with a layer (or layers) of a fibrous mass composed of ground cellulose, water, a viscosity enhancing polymer, a hygroscopic swelling agent and, optionally, additives selected on the basis of the properties desired (e.g., rain resistance, heat absorption from the sun, heat reflectance, or heat insulation). The invention also relates to compositions comprising a layer of cement or concrete and a layer (or layers) of such a fibrous mass.Type: GrantFiled: November 9, 1990Date of Patent: September 1, 1992Inventor: Leslie L. Balassa
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Patent number: 5140086Abstract: A method is disclosed for producing a polyureacellulose composite material from substantially delignified cellulosic material and an isocyanate resin. The isocyanate resin comprises a polyisocyanate, preferably PMDI, and a miscible organic solvent, preferably one such as propylene carbonate having a high boiling point and low flammability and toxicity. The composite surprisingly exhibits values of physical parameters that are at least as good as, and sometimes far superior to, corresponding parameters of similar composites made using neat (undiluted) polyisocyanate. Single- and multiple-ply composites can be made, employing only a single curing step.Type: GrantFiled: November 27, 1990Date of Patent: August 18, 1992Assignee: Weyerhaeuser CompanyInventors: Frank R. Hunter, James F. L. Lincoln, David W. Park
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Patent number: 5137773Abstract: A transparent substrate material for receiving or containing an image comprised of a supporting substrate and a coating composition comprised of a mixture of (a) non ionic celluloses or blends thereof; (b) ionic celluloses or blends thereof; (c) poly(alkylene oxide); and a noncellulosic component selected from the group consisting of (1) poly(imidazoline)quaternized; (2) poly(N,N-dialkyl-dialkylene piperidinium halide); (3) poly(acrylamido alkyl propane sulfonic acid); (4) poly(ethylene imine) epihalohydrin; (5) poly(acrylamide); (6) acrylamide-acrylic acid copolymer; (7) poly(vinyl pyrrolidone); (8) poly(vinyl alcohol); (9) vinyl pyrrolidone-dialkyl aminomethylmethacrylate copolymer quaternized; (10) vinyl pyrrolidone-vinyl acetate copolymer; and mixtures thereof. The substrate may be coated on one, or both sides depending, for example, on its use.Type: GrantFiled: March 2, 1990Date of Patent: August 11, 1992Assignee: Xerox CorporationInventor: Shadi L. Malhotra
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Patent number: 5114999Abstract: Disclosed is a binder insolubilizer for use in binder-containing paper coating compositions, the insolubilizer consisting essentially of an aqueous formulation containing at least about 15 weight percent of titratable glyoxal and at least one polyhydroxy compound.Type: GrantFiled: April 3, 1989Date of Patent: May 19, 1992Assignee: PPG Industries, Inc.Inventors: Sai H. Hui, W. Bruce Darlington
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Patent number: 5096748Abstract: The present invention relates to methods to protect curing cement or concrete from excess evaporative water loss and/or from rain, excess heat loss, or excess heat gain. More particularly the method relates to coating curing cement or concrete with a layer (or layers) of a fibrous mass composed of ground cellulose, water, a viscosity enhancing polymer, a hygroscopic swelling agent and, optionally, additives selected on the basis of the properties desired (e.g., rain resistance, heat absorption from the sun, heat reflectance, or heat insulation). The invention also relates to compositions comprising a layer of cement or concrete and a layer (or layers) of such a fibrous mass.Type: GrantFiled: May 4, 1990Date of Patent: March 17, 1992Inventor: Leslie L. Balassa
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Patent number: 5082914Abstract: The invention describes the preparation and use of cellulose esters grafted with silicon-containing thiol pendent groups which can serve as crosslinking agents during free radical polymerization of ethylenically unsaturated materials. The grafted cellulose esters provide a crosslinked polymeric network with enhanced solvent resistance and hardness properties when used in conjunction with ethylenically unsaturated materials.Type: GrantFiled: December 15, 1989Date of Patent: January 21, 1992Assignee: Eastman Kodak CompanyInventors: Phillip M. Cook, Stephen S. Kelley
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Patent number: 5032682Abstract: Silated polysaccharides having 0.005 to 2.0 silyl molar substitution per anhydrosaccharide unit form water resistant films when cast from aqueous solution and dried in the presence of atmospheric carbon dioxide. These films are soluble in aqueous caustic. A preferred water soluble polymer is a cellulose ether with 0.005 to 1.0 silyl substitution.Type: GrantFiled: September 28, 1990Date of Patent: July 16, 1991Assignee: Aqualon CompanyInventor: Arjun C. Sau
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Patent number: 5008359Abstract: The invention is a method of making a cellulose based polymeric material and the products of the invention. A cellulosic substrate is impregnated with an essentially uncatalyzed polyfunctinal isocyanate and pressed at elevated temperature and pressure. The substrate may be a chemical or thermomechanical pulp or paper while the isocyanate is preferably diphenylmethane diisocyanate or its oligomers. Pressing conditions are preferably in the range of about 150.degree.-245.degree. C. at pressures in the range of about 2700-8300 kPa for times less than 2 minutes. Moisture content of the cellulosic substrate is not highly critical and may be as high as 7% without adverse effects. The product is especially useful as overlays and for forming strong, water resistant laminates which can be molded in either flat or three dimensional forms.Type: GrantFiled: November 25, 1988Date of Patent: April 16, 1991Assignee: Weyerhaeuser CompanyInventor: Frank R. Hunter
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Patent number: 4997697Abstract: A transparent substrate material for receiving or containing an image and comprised of a supporting substrate base, an antistatic polymer layer coated on one or both sides of the substrate and comprised of hydrophilic cellulosic components, and a toner receiving polymer layer contained on one or both sides of the antistatic layer, which polymer is comprised of hydrophobic cellulose ethers, hydrophobic cellulose esters, or mixtures thereof, and wherein the toner receiving layer contains adhesive components.Type: GrantFiled: June 29, 1989Date of Patent: March 5, 1991Assignee: Xerox CorporationInventor: Shadi L. Malhotra
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Patent number: 4952431Abstract: A new bonding agent for fibrous substrates used to reinforce food casing is formulated by dissolving cellulose carbamate and an alkaline curing resin in a dilute caustic solution in such a manner that the ratio of carbamate to resin is greater than 1:1 by weight. The preferred resin is a polymeric reaction product of epichlorohydrin and a polyamide. The bonded substrate contains up to 10% by weight of the bonding agent and exhibits a porosity that is not significantly less than that of the base web and a caustic tensile strength greater than 300 grams per 25 millimeters. Casings made from the substrate can use the casing films employed heretofore or a carbamate-resin film formulation.Type: GrantFiled: April 13, 1989Date of Patent: August 28, 1990Assignee: The Dexter CorporationInventors: Diane M. Robertson, Ronald H. Pomeroy, Alan W. Meierhoefer
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Patent number: 4892778Abstract: A dispenser is enclosed for delivering a beneficial agent to an enviroment of use. The dispenser comprising a wall that surrounds an internal space comprising a first mean in the dispenser for changing from a dispenser state to an environment of use state on leaving the dispenser, a beneficial agent in the first means, and a second means in the dispenser for aiding in displacing the first means from the dispenser.Type: GrantFiled: May 27, 1987Date of Patent: January 9, 1990Assignee: ALZA CorporationInventors: Felix Theeuwes, Patrick S. L. Wong, Richard Cortese, James B. Eckenhoff
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Patent number: 4865914Abstract: A transparency comprised of a supporting substrate and thereover a blend comprised of poly(ethylene oxide), and carboxy methyl cellulose together with a component selected from the group consisting of (1) hydroxypropyl cellulose; (2) vinylmethyl ether/maleic acid copolymer; (3) carboxymethyl hydroxyethyl cellulose; (4) hydroxyethyl celluose; (5) acrylamide/acrylic acid copolymer; (6) cellulose sulfate; (7) poly(2-acrylamido-2-methyl propane sulfonic acid); (8) poly(vinyl alcohol); (9) poly(vinyl pyrrolidone); and (10) hydroxypropyl methyl cellulose. In addition, papers with the aforementioned coatings are disclosed herein.Type: GrantFiled: March 20, 1987Date of Patent: September 12, 1989Assignee: Xerox CorporationInventor: Shadi L. Malhotra