Abstract: An elastomeric nonwoven absorbent web is provided. The web comprises a nonwoven fibrous matrix of elastomeric melt-blown small diameter fibers and absorbent staple fibers or absorbent particulate material, wicking staple fibers, and bulking staple fibers dispersed throughout the matrix. This web is particularly useful in an absorbent elastomeric wound dressing. The wound dressing has a fluid permeable, compliant, low adherency wound contacting layer, an intermediate conformable, fluid-absorbent element, i.e., the elastomeric nonwoven absorbent web, and a soft, compliant cover layer.
Type:
Grant
Filed:
January 24, 1990
Date of Patent:
September 18, 1990
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Polypropylene articles are provided. The polypropylene articles comprise non-crystalline mesomorphous polypropylene having olefinic unsaturation-containing monomers graft-polymerized thereon by ionizing radiation in a dosage sufficient to degrade crystalline polypropylene. The irradiated polypropylene articles retain useful tensile properties after storage periods of as long as at least about four months.
Type:
Grant
Filed:
March 20, 1989
Date of Patent:
August 21, 1990
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Richard J. Rolando, Dennis L. Krueger, Daniel E. Meyer, Thomas I. Insley
Abstract: Storage-stable, thermally-curable, one-part epoxy resin compositions comprising a curable epoxide resin; a curative amount of an aliphatic or non-aromatic cyclic polyol having about 2 to 18 carbon atoms, at least two hydroxy groups of said polyol being primary or secondary, and said polyol being free of strong acid groups, and free of electron-withdrawing substituents and large groups which cause steric hindrance in the .alpha.-position in relation to the carbon atoms attached to the methylol groups of the polyol; and a catalytic amount of an imidazole compound.
Type:
Grant
Filed:
February 21, 1989
Date of Patent:
August 14, 1990
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Kent S. Tarbutton, Janis Robins, John C. Tangen
Abstract: A method for imparting to fibrous polyamide materials stain resistance to acid colorants is provided. The method comprises contacting the fibrous polyamide materials with an aqueous treating solution comprising polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof, and drying said substrate, said polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof being provided in a sufficient amount and having a solubility and molecular weight such that said fibrous polyamide substrate has an improved acid colorant stain resistance.
Type:
Grant
Filed:
January 29, 1990
Date of Patent:
June 26, 1990
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
John C. Chang, Maynard H. Olson, Imelda A. Muggli
Abstract: Irradiated polypropylene articles of non-crystalline mesomorphous polypropylene and a method for preparing the articles are provided. The articles are irradiated with a sterilizing dosage of ionizing radiation. The irradiated articles such as films and blown microfiber webs are substantially undegraded after storage periods of as long as six months.
Type:
Grant
Filed:
January 24, 1989
Date of Patent:
June 5, 1990
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Dennis L. Krueger, Thomas I. Insley, Daniel E. Meyer, Richard J. Rolando
Abstract: Cationic and non-ionic fluorochemicals, mixtures of cationic and non-ionic fluorochemicals, blends of the mixtures with fluorochemical poly(oxyalkylenes), and compositions of the fluorochemicals with hydrocarbon nonionic surfactants are provided. These fluorochemicals and compositions, in dispersions, emulsions and microemulsions, may be applied to porous fibrous substrates to give oil and water repellancy and soil resistance.
Type:
Grant
Filed:
March 30, 1984
Date of Patent:
January 28, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Ethylenically unsaturated polyesters are provided. These ethylenically unsaturated polyesters are the reaction product of (a) a polyhydroxy polyester material that is the reaction product of at least one organic dicarboxylic acid, at least one diepoxide, and, optionally, monocarboxylic acid and/or monoepoxide with (b) a polymerizable ethylenically unsaturated compound having a functional group reactive with the hydroxyl groups of the polyhydroxy polyester. This product is particularly useful as a protective coating material.
Type:
Grant
Filed:
November 21, 1984
Date of Patent:
January 28, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Blends of fluoroaliphatic radical-containing, substituted guanidines and fluoroaliphatic radical-containing poly(oxyalkylenes) useful in the form of organic solutions or aqueous dispersions in the treatment of fibrous substrates, such as textile fibers, to impart oil and water repellency.
Type:
Grant
Filed:
July 24, 1984
Date of Patent:
January 21, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Ethylenically unsaturated cellulose esters are provided. These ethylenically unsaturated cellulose esters are the reaction product of a cellulose ester having unreacted hydroxyl groups and a polymerizable ethylenically unsaturated compound having an isocyanato group reactive with the hydroxyl groups of the cellulose ester. The product is substantially free of unreacted isocyanate groups and is particularly useful in protective coatings.
Type:
Grant
Filed:
November 21, 1984
Date of Patent:
January 21, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Fluorochemical aliphatic carboxylic acids, and water dispersible salts thereof, having fluoroaliphatic radicals and urylene and/or carbamato radicals, are used to impart oil and water repellency to fibrous substrates such as tanned leather.
Type:
Grant
Filed:
March 26, 1985
Date of Patent:
January 14, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Acrylic-type normally tacky and pressure-sensitive adhesives are firmly bonded to polyolefin substrates that have been primed by coating with a monomer composition and subjecting the coated substrate to actinic radiation to effect graft-polymerization.
Type:
Grant
Filed:
February 27, 1984
Date of Patent:
January 7, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Blends of fluoroaliphatic radical-containing compounds and fluoroaliphatic radical-containing poly(oxyalkylenes) useful in the form of organic solutions or aqueous dispersions in the treatment of fibrous substrates, such as textile fibers, to impart oil and water repellency.
Type:
Grant
Filed:
August 15, 1984
Date of Patent:
December 24, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A nonwoven stretch fabric is provided. The fabric is produced from a web of bicomponent fibers bonded together by fusion of fibers at points of contact and thermally crimped in situ in the web. The fabric has good uniformity, good thermal insulating properties, and is produced by subjecting a fibrous web of thermally bondable, thermally crimpable bicomponent fibers to heated gas supplied continuously to the top of the web and intermittently to the bottom of the web.
Type:
Grant
Filed:
July 11, 1984
Date of Patent:
November 5, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A negative-acting photoresist imaging system is provided having a substrate, a metal layer, a latently sensitized, crosslinkable, negative-acting photoresist base layer, and a negative-acting photoresist layer. The system may further have an organic protective coat between the metal layer and the base layer, a matte top layer, and/or an antistatic layer on the back side of the substrate.
Type:
Grant
Filed:
July 19, 1984
Date of Patent:
October 1, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Novel fluoroaliphatic radical-containing, substituted guanidines useful in the form of organic solutions or aqueous dispersions in the treatment of fibrous substrates, such as textile fibers, to impart oil and water repellency.
Type:
Grant
Filed:
November 9, 1982
Date of Patent:
September 10, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Fluorochemical aliphatic carboxylic acids, and water dispersible salts thereof, having fluoroaliphatic radicals and urylene and/or carbamato radicals, are used to impart oil and water repellency to fibrous substrates such as tanned leather.
Type:
Grant
Filed:
October 25, 1982
Date of Patent:
June 25, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A linerless double-coated pressure-sensitive adhesive tape of the prior art is wound directly upon itself into a roll that can later be unwound without delamination or offsetting of adhesive. The novel tape differs from the prior tape in that the pressure-sensitive adhesive at each of its faces is a substantially solvent-free, crosslinked alkyl acrylate polymer and can be aggressively tacky for uses requiring high-performance adhesion.
Type:
Grant
Filed:
April 4, 1983
Date of Patent:
June 11, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Composite of two pressure-sensitive adhesive tapes which are releasably adhered together adhesive face to adhesive face and then put to individual uses. The tapes are separable because their facing adhesives are substantially solvent-free, crosslinked alkyl acrylate polymers which can be aggressively tacky for uses requiring high-performance adhesion.
Type:
Grant
Filed:
April 4, 1983
Date of Patent:
April 23, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Fragrance releasing appliques are provided which comprise a transparent or translucent substrate bearing microcapsules in a binder on one surface and an adhesive on the remaining surface.
Type:
Grant
Filed:
October 11, 1983
Date of Patent:
January 15, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Norman P. Sweeny, Keith E. Relyea, Wayne L. Brustad
Abstract: A method for the manufacture of an electrically charged fibrous filter from a highly molecular non-polar fiber material wherein a .[.web.]. .Iadd.film .Iaddend.of the fiber material is continuously fed and stretched. At least one side of the stretched .[.web.]. .Iadd.film .Iaddend.is homopolarly charged by a plurality of corona charging elements. The charged .[.web.]. .Iadd.film .Iaddend.material is then fibrillated, collected and processed into a filter.
Type:
Grant
Filed:
August 1, 1983
Date of Patent:
June 3, 1986
Assignee:
Minnesota Mining and Manufacturing Company