Abstract: A ceramic composite is provided comprising ceramic fibers and microparticles bound together as a porous matrix with a ceramic binder. The ceramic composite is particularly useful for transporting cryogenic fluids.
Abstract: A method and corresponding product whereby hydrophobic polyolefin-containing nonwoven materials are provided with sustainable hydrophilic properties for rewet purposes by incorporation into the appropriate spin melt composition an effective amount of an alkoxylated fatty amine in optional combination with up to 60% by weight of primary fatty acid amide.
Abstract: Disclosed is a method of producing a barrier fabric having stretch and recovery properties. The method includes the steps of heating at least one nonwoven web containing meltblown non-elastic thermoplastic polymer fibers to a temperature at which the peak total energy absorbed by the nonwoven web of meltblown fibers is at least about 250 percent greater than the amount absorbed by the nonwoven web of meltblown fibers at room temperature; applying a tensioning force to neck the heated nonwoven web; and cooling the necked nonwoven web so that the nonwoven web has at least the same hydrostatic head and/or particulate barrier properties as the nonwoven web before necking. Also disclosed is a stretchable barrier fabric composed of a nonwoven web of meltblown non-elastomeric thermoplastic polymer fibers, the nonwoven web being heat treated so that it is adapted to stretch at least about 10 percent more than an identical untreated nonwoven web of meltblown non-elastomeric thermoplastic polymer fibers.
Type:
Grant
Filed:
November 15, 1995
Date of Patent:
December 10, 1996
Assignee:
Kimberly-Clark Corporation
Inventors:
Ruth L. Levy, Charles E. Bolian, II, Michael T. Morman, Lynn E. Preston
Abstract: An electromagnetic shielding garment comprising amorphous alloy strips or strands woven together. The woven material or sheet can be reenforced by bonding it to a flexible material such as plastic. This garment is effective in shielding a patient from extraneous electromagnetic radiation to allow sensitive medical measurements to be taken with minimal interference.
Abstract: The invention relates to water-repellent composite grains. Each composite grain includes: a first grain; and a low molecular weight polytetrafluoroethylene (PTFE) covering the first grain. The first grain is higher than the PTFE in mechanical strength. With this, the composite grains are improved in mechanical strength. A water-repellent article is produced by anchoring the composite grains to a substrate through an adhesive layer formed on the substrate. The composite grains are partly exposed on the adhesive layer and partly submerged in the adhesive layer. With this, the water-repellent article is made minutely rough. The water-repellent article is improved in mechanical strength and water repellency.
Abstract: This invention provides an exceptionally expandable sheet elastic complex which consists of an elastic body sheet and a sheet backing material which is mounted on either one or both sides of it, these two members being bonded together along multiple, oblong, mutually parallel bonding sections, and in which multiple, mutually parallel channels are formed between the two members because the width of the sheet backing material between mutually adjacent bonding sections is greater than that of the elastic body sheet. The sheet backing material does not accept more than the minimum constraint of the elastic body sheet, and its waveform surface has excellent properties as a material for use in sanitary products. The invention also provides a process for manufacturing this sheet elastic complex.
Abstract: Barrier materials for reducing the permeability of plastic packaging materials are provided, characterized as containing at least about seven percent by weight amine nitrogen, or a total of at least about 17 percent amine nitrogen plus hydroxyl groups. The barrier materials exhibit oxygen permeability of less than about 1.5 cc-mil/100 in.sup.2 -day-atmosphere and a carbon dioxide permeability of less than about 15 cc-mil/100 in.sup.2 -day-atmosphere at 23.degree. C. and zero percent relative humidity. The barrier material can be formed from polyepoxide and polyamine. Optionally the polyamine may comprise prereacted polymeric resin formed from a polyepoxide and a polyamine. Multilayer packaging materials and multilayer containers including the polyamine-polyepoxide barrier material are part of the invention.
Type:
Grant
Filed:
October 27, 1995
Date of Patent:
November 12, 1996
Assignee:
PPG Industries, Inc.
Inventors:
Richard M. Nugent, Jr., Ken W. Niederst, Jerome A. Seiner
Abstract: This invention relates to linear, water-dispersible sulfopolyesters that incorporate higher order polyalkylene glycol units. The sulfopolyesters provide improved abrasion and blocking resistances in polyester fiber sizing applications.
Type:
Grant
Filed:
November 27, 1995
Date of Patent:
November 5, 1996
Assignee:
Eastman Chemical Company
Inventors:
Scott E. George, Edgar W. Lefler, IV, James M. Spain, Jr.
Abstract: A dual bar warp knit, hexagonal mesh fabric for use in hernia repair and to mend other muscle and tissue wall defects, produced according to a back bar pattern chain of 2/0 2/4 2/0 4/6 4/6 and a front bar pattern chain of 4/6 4/2 4/6 2/0 2/4 2/0.
Abstract: The present invention is to provide a resin composite composition containing a third component for improving the properties of the composite product, based on the knowledge that the composite function between the matrix resin and the liquid crystal is improved by addition of a compatible agent therebetween. Therefore, there is provided a thermoplastic composite composition comprising a thermoplastic matrix resin, a liquid crystal resin which has a liquid crystal transition temperature higher than a minimum temperature of the matrix resin is to be molded and an ability to be melt-extruded into a fiber in the matrix resin, characterized by further comprising a compatible agent for providing an improved bonding power with an interfacing surface between the matrix resin and the liquid crystal resin, within a range possible to prevent the liquid crystal resin into a fiber or fibers having an aspect ratio of less than 3.
Abstract: An elongated wood structural member or beam for bearing predetermined loads transverse to the lengths of the members preferably includes multiple elongate wood segments bonded together with their lengths generally aligned with the beam length as in a glue-laminated members. The predetermined load corresponds to a resisting moment that produces compressive and tensile stresses in the structural member in respective compression and tension portions of the beam on opposite sides of a neutral axis. A synthetic tension reinforcement having multiple synthetic fiber strands held within a resin matrix is adhered to at least one of the wood segments in the tension portion of the structural member and is selected to be substantially capable of bearing the tensile stress produced by the resisting moment and cooperates with the wood segments to position the neutral axis within the beam.
Abstract: Labelstock for in-mold labeling purposes which is characterized by a tensile ultimate elongation per ASTM D-882 of at least about 10% in one or both of the machine and transverse directions, and which contains a sufficient amount of one or more slip additives to prevent a significant degree of edge-welding between adjacent stacked sheets of the labelstock on a high type die cutter in an in-mold labeling process.
Abstract: A fire safety coating, particularly intended for application to hydrocarbon-conducting steel pipes (1) in the splash zone underneath oil plants at sea, consists of at least three layers, where the outer layer (5) is a mechanical protecting layer of rubber or plastic material, the next inside layer (4) is a flame-stopping layer comprising inorganic fibers and a rubber material, and an inside layer (3) is a rubber material which reacts particularly at a high temperature to liberate gases which both prevent inward penetration of oxygen and cause a transformation of the rubber material in the flame-stopping layer (4) to form a hard shell.
Abstract: This invention provides a multi-layer material designed to cover ceramic armor applied to military vehicles, which suppresses ceramic shrapnel created during a ballistic event up to the magnitude of a 0.50 caliber at 2000-2200 feet per second at zero degree obliquity. This material is a laminate comprising of three distinct layers of fabric. The middle layer is a heavy ballistic nylon or polyester fabric. A nylon fabric of this nature weighs between fifteen to thirty-five ounces per square yard and a polyester fabric of this nature weighs between fifteen to thirty-five ounces per square yard. This fabric can be either woven or knitted. The outer layer that is attached to the middle layer can be any type of decorative fabric, including woven, nonwoven and knit fabrics. This fabric should be relatively light weight and dyeable. The bottom layer of fabric is a loop pile, warp knit, weft-inserted fabric.
Abstract: A breathable non-woven composite fabric having barrier capabilities to biological liquids comprised of at least one non-woven layer bonded to at least one surface of a thermoplastic microporous film, the non-woven composite fabric providing a barrier to passage of biological liquid when the composite fabric is subjected to contact with synthetic blood under the dictates of testing procedure ASTM ES21-92 and ES22-92 while maintaining a moisture of vapor transmission rate of greater than about 450 grams per square meter for 24 hours at about 75.degree. F. and about 65% relative humidity, the non-woven composite fabric having a breaking strength of at least about 14 pounds.
Abstract: This invention relates to methods for making a carpet having a secondary backing which is substantially impervious to liquids. The methods involve applying a repellent finish onto the secondary backing material and drying the finish. The finish may be applied as foam to the secondary backing, against the force of gravity, by means of a press roll. This invention also includes the resultant carpets prepared from these methods.
Type:
Grant
Filed:
April 6, 1995
Date of Patent:
September 24, 1996
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
William W. Heim, James K. Hendrix, Joyce M. Materniak, Peter M. Murphy, Neil A. Panzier, Yashavant V. Vinod
Abstract: Absorption retardant substances, such as water-repellents, are applied to ballistic energy absorbing fabric before the fabric is encased in a resin system to form an armor piece. Tiles made from boron carbide, other ceramic material or steel can be attached to or incorporated into the cured resin and fabric system to make composite structural armor pieces. The fabric can be made from polyaramid fibers or fiberglass fibers.
Abstract: A sealable film is disclosed comprising (i) a base layer comprising polypropylene and a hydrocarbon resin and (ii) at least one top layer comprising (a) an ethylene/propylene copolymer having an ethylene content of not more than about 10% by weight, (b) a propylene/1-butene copolymer, (c) a propylene/ethylene/alpha-olefin terpolymer, or (d) a blend of two or more of (a), (b) and (c), wherein at least one of said base layer and said at least one top layer contains an anti-blocking agent or lubricant and wherein the top layer contains a hydrocarbon resin. The film possesses improved barrier properties with respect to permeability to water vapor and oxygen, and which at the same time exhibits favorable slip properties and low shrink values.
Type:
Grant
Filed:
July 17, 1995
Date of Patent:
September 10, 1996
Assignee:
Hoechst Aktiengesellschaft
Inventors:
Detlef E. Schuhmann, Herbert Peiffer, Ursula Murschall, Gunter Schloegl
Abstract: Nonwoven structures, prepared from meltblown microfibers, and fibers having heterogeneous melt viscosity. The structures can be in the form of composite nonwoven fabrics, made from alternating layers of the indicated meltblown and heterogeneous fibers; the melt flow rate, of the surface of the heterogeneous fibers, can be one third or more of the meltblown fibers' melt flow rate. The composite nonwoven fabrics have excellent barrier properties, and are useful as sterilization wraps, and for other medical, industrial, and hygiene applications.
Abstract: A non-woven composite interlining fabric, which is capable of being fused on by application of an adhesive substance, contains a non-woven fabric having a mass per unit area of 10 to 40 g/m.sup.2 with warp reinforcement, which warp reinforcement contains 5 to 25 g/m.sup.2 textured warp yarn having a primary elongation of 10 to 35% with a total denier of 30 to 120 dtex. The weight ratio of warp yarn:non-woven fabric is from 1:3 to 3:1. The thread count is 3 to 25/inch. The composite fabric is manufactured in a warp knitting machine having a non-woven fabric feed, the non-woven fabric being reinforced with textured filaments and, at the end, the composite being thermofixed and provided with the melting adhesive. After the warp yarn is fed and prior to the thermofixing, the composite fabric is subjected to a shrinking process. The composite fabric exhibits a final elongation in the longitudinal direction of 50 to 120%.