Abstract: The polytetrafluoroethylene (PTFE) porous film of the invention is characterized in that the film is formed from a PTFE resin molding powder obtained by suspension polymerization and has a porosity of 40 to 80%, and removal ratio of uniform particle having a 0.2 .mu.m diameter of less than 99% or bubble point of not less than 3 kg/cm.sup.2. This PTFE porous film is obtained by a process of compression-molding a PTFE resin molding powder to prepare a preform, sintering the preform at a temperature not lower than its melting point, processing the preform into films, then laminating at least two of the obtained films, fusing the films to unite them, and subjecting the obtained film to uniaxial or biaxial stretching at a temperature not higher than the melting point of PTFE. If desired, the finally obtained film may be subjected to heat setting. In the PTFE porous film of the invention, pores are nearly round and the diameters of the pores are almost uniform.

Abstract: A composite structure is provided. The structure is based upon a three-dimensional woven fabric structure. The three-dimensional woven fabric has a first fabric layer and a second fabric layer spaced apart from the first fabric layer, with the layers connected by threads which form a portion of the three-dimensional woven fabric structure. The threads define voids in the space between the first and second layers. A first resinous material is coated onto and allowed to penetrate the first layer of the woven fabric structure. Next a second resinous material is coated onto and allowed to penetrate the second layer of the woven fabric structure. Following the application of the resins, the voids remain substantially empty. In order to complete the formation of the composite structure, the resins are fully cured. Using this method it is possible for the first resinous material and the second resinous material to be chemically incompatible, yet mechanically attached by the cloth material.

Abstract: Uncoated, tightly woven, synthetic filament yarn fabric for manufacturing an air bag. The fabric is manufactured from polyamide yarns having a filament linear density of less than 4 dtex. The air permeability of this fabric is <10 l/dm.sup.2 .multidot.min and its specific stiffness is <1.0.times.10.sup.-2.

Abstract: A thermoplastic film, adapted for adhesion, composed of a compound of polyamide-based thermoplastic elastomers and of copolymers of olefins, the latter preferably being constituted of at least two different monomers of olefins. The composition of the thermoplastic film is such that the thermoplastic elastomers represent at least 50% and preferably 60% of the total weight of the compound.

Abstract: Fiberglass insulation having improved parting strength is prepared by forming a fiberglass mat, applying an aqueous acid aluminum phosphate binder, curing the binder, and autoclaving the resultant insulation batt.

Abstract: Provided is a conductivized cellulosic sheet material and a method for making the same. The conductivized sheet material comprises a fibrous matrix of cellulosic material and conductive clay intimately and uniformly dispersed throughout the cross-sectional thickness of the fibrous matrix. Such a conductivized sheet exhibits advantageously low volume and surface resistivities at high and low relative humidities.

Abstract: Flexible composite materials which are suitable for use as fire barriers for either static or dynamic joints are cost effective and easy to install. In one preferred embodiment the flexible composite includes (a) a first layer material having first and second major surfaces, the first layer material including inorganic fibers and a binder in the form of a flexible mat; (b) a second layer material adhered to the first major surface of the first layer material, the second layer material consisting essentially of metal foil, the second layer material having a melting temperature of at least about 350.degree. C.; and (c) a third layer adhered to the second major surface of the first layer material, the third layer material including an intumescent fire retardant composite material.

Abstract: A padded construction useful for straps or irregularly-shaped articles is provided which includes a pair of opposed outer panels and a core sandwiched between the outer panels with side margins extending between the latter and having the core between the side margins. One of the outer panels and the side margins are formed of a closed cell neoprene synthetic resin foam material, whereas the core includes a length of synthetic resin (e.g., nylon or polyester) webbing. In one embodiment, the outer panels and side margins are integrated to present a tubular section of the neoprene foam material, and the core is disposed within the tubular section; an exterior decorative leather piece may be attached by sewing through the tubular subassembly. In another embodiment, the core includes an internal leather strap to which the webbing is attached, and neoprene is first applied to the core subassembly and is wrapped around the side margins thereof in an overlapping fashion.

Abstract: A bodyboard with skins covering the top and bottom surfaces of a foam plank that forms a core in the bodyboard. The top skin is prepared by heat-expanding a foamable matrix layer having a polyolefin film deposited on the top surface of the matrix layer. With the application of heat, the matrix layer becomes a foam, and the polyolefin film softens and integrates with the foam. Graphics carried internally on the film become an integral part of the foam.

Abstract: A composite nonwoven fabric having at least one hydrophobic microporous layer and at least one other layer formed of multicomponent fibers. The multicomponent fibers comprise a lower melting thermoplastic resin component and one or more higher melting thermoplastic resin components, wherein a substantial proportion of the surfaces of the multicomponent fibers consists of the lower melting thermoplastic resin component. The microporous layer is composed in substantial part of at least one thermoplastic resin which is thermally miscible with and adherent, upon thermal activation, to the lower melting thermoplastic resin component of the multicomponent fibers.

Abstract: A lining material for pipe lines, especially those buried in the ground such as sewage pipe lines, and a process for providing such pipe lines therewith, includes a flexible tubular film, a resin-impregnated sheet covering the outer surface of the flexible tubular film, and a tubular covering material having a strong resistance to tensile force. The sheet may be constructed by several units of sheet fractions which are overlapped in both lateral end portions so as to be slidable over each other in opposite directions to form a tubular sheet. The lining material is applicable for repair and/or reinforcement to the inner surface of a pipe line having damaged portions. According to the process for providing pipe lines with this lining material, thermocuring of the lining material applied onto the inner surface of a pipe line can be carried out by moving a nozzle for jetting pressurized steam from one end to the other end of the pipe line without applying high pressure to the pipe line.

Abstract: A crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3 a surface area of equal to or greater than about 30 m.sup.2 /g, a compression strength of equal to or less than about 10% yield at 10 psi, and an average pore diameter of less than about 1000 Angstroms.When the hydrogel polymer used is guar gum, the resulting product is particularly useful for thermal insulation applications.

Abstract: A fiber-reinforced composite that includes at least one tow in a metal matrix. The tow includes a plurality of continuous ceramic fibers held together by a carbonaceous matrix.

Abstract: A belt for through-air drying a cellulosic fibrous structure. The belt comprises two layers, a web contacting first layer and a machine facing second layer. The two layers are joined together by either adjunct tie yarns or integral tie yarns. The resulting belt has a backside texture caused by opaque yarns which shield actinic radiation. The opaque yarns are limited to the second layer, and do not tie the second layer to the first layer. The two layers may have vertically stacked machine direction yarns.

Abstract: Abrasive articles comprising precisely shaped particles are disclosed. The particles are bonded together to form a shaped mass, e.g., a wheel; alternatively, the particles can be bonded to a backing to form a coated abrasive article; or the particles can be bonded into a fibrous, nonwoven substrate to form a non-woven abrasive article.

Abstract: A printing blanket which resists gauge loss throughout its useful life when subjected to printing nip pressures by retaining at least 95% of its original gauge throughout the useful life of the printing blanket. The printing blanket includes at least a printing surface layer and at least one reinforcing woven fabric ply and may also include a compressible layer. At least one, and preferably all, of the reinforcing woven fabric plies in the blanket construction are treated or fabricated to resist permanent deformation when subjected to printing nip pressures.

Abstract: A thermostable substrate for flexible circuit boards having excellent flame-resistance, handling, and storage qualities may be produced by treating a substrate of a nonwoven fabric or paper with a flame-resistant, halogen-free polymeric composition. The polymeric composition comprises an aqueous mixture of a copolymerizate of acrylic acid esters and styrene, and an aminoplastic or phenoplastic precondensate to which a mixture of fine-particle red phosphorus and fine-particle ammonium polyphosphate is also added.

Abstract: A method of producing a nonwoven mat from recycled carpet. The carpet comprises high and low melting thermoplastic fibers. The method comprises shredding the carpet into pieces, scattering the pieces onto a support web to form a layer and heating at least the surface thereof to affect melting of the lower melting thermoplastic fibers.

Abstract: A crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3, a surface area of equal to or greater than about 30 m.sup.2 /g, and a compression strength of equal to or less than about 75% yield at 300 psi.

Abstract: A pultruded composite member having a longitudinal axis comprising a plurality of reinforcing fibers in a solid polymer matrix, said member having embedded at least one functional feature having been incorporated therein during its manufacture when the fiber reinforced liquid polymer was pulled through a pultrusion apparatus.