Abstract: Making foamed polyeolefin tapes include combining a polyolefin resin and a chemical blowing agent to form a mixture. This mixture can then be heated in an extruder to create a supersaturated solution of gas within the polyolefin resin. A cooling device can be positioned adjacent to a die at a set distance for receiving extruded resin and for allowing exposure of the extruded resin to ambient air. This space between the cooling device and die outlet allows bubbles to grow in the extruded resin and to be shaped such that voids or empty spaces can be generated within the extruded polyolefin resin. The voids allow the formation of tapes which use less material but have adequate strength for various applications, such as carpet backings, geotextiles, packaging, housewrap, bags, wire insulation, and reinforcement elements in concrete.

Abstract: Making foamed polyolefin tapes can include combining a polyolefin resin and a chemical blowing agent to form a mixture. This mixture can then be heated in an extruder to create a supersaturated solution of gas within the polyolefin resin. A cooling device can be positioned adjacent to a die at a set distance for receiving extruded resin and for allowing exposure of the extruded resin to ambient air between a die outlet and the cooling device. This predetermined distance or space between the cooling device and die outlet allows bubbles to grow in the extruded resin and to be shaped such that voids or empty spaces can be generated within the extruded polyolefin resin. The voids or empty spaces allow the formation of tapes which use less material but have adequate strength for various applications, such as for carpet backings, geotextiles, packaging, housewrap, bags, wire insulation, and reinforcement elements in concrete.

Abstract: A two-layer secondary carpet backing including a woven scrim layer and a fibrous layer is described. The woven scrim layer is characterized as having a low open area and a flat weave. The two-layer secondary backing is capable of having a non-abrasive, textile back surface. The secondary carpet backing is also capable of having a construction that permits high carpet manufacturing speeds due to high air permeability and is capable of providing high dimensional stability, seam strength, and delamination strength to tufted carpets made therefrom.

Abstract: Carpet backings and use thereof in tufted carpets with good tuft bind and fuzz resistance and free of inorganic and latex materials are disclosed. Backings suitable as tuftable primary backings or as secondary backings have a nonwoven fabric with thermoplastic filaments and a thermoplastic supporting fabric operatively attached as by needling, thermal calendaring or point bonding.

Abstract: Secondary carpet backings woven in a flat weave construction from warp tapes and multifilament picks with 50 to about 100% theoretical coverage in the warp but less than full effective coverage and average pick counts of 10 to 20 per inch impart dimensional stability and high peel strength in carpets incorporating the backings and facilitate robust drying rates in manufacture of carpets.

Abstract: Secondary carpet backings woven in a flat weave construction from warp tapes and multifilament picks with to about 100% theoretical coverage in the warp but less than full effective coverage and average pick counts of 12 to 20 per inch, such that the fabrics have weights of about 1.5 to about 7 osy and air permeability, provide dimensional stability and peel strength in carpets and facilitate robust cure rates in carpet manufacture.

Abstract: This invention provides breathable composite materials with good liquid barrier properties comprising a laminate of a nonwoven web layer and a breathable film layer wherein breathability of the composite is provided by a plurality of point-like deformations of the film layer. In one embodiment, the composites also have a soft, cloth-like texture at at least one surface thereof. Also provided is a process for making such composites comprising applying a molten film-forming resin composition capable of developing breathability on deformation to a nonwoven web, cooling the molten composition to form a coated web having a web layer bonded to a film layer, and subjecting the coated web to heat and pressure at a plurality of points on a surface thereof wherein the heat, pressure and density of, and proportion of the composite surface occupied by, the deformations are effective to impart breathability to the film without loss of liquid barrier properties.

Abstract: This invention provides breathable composite materials with good liquid barrier properties comprising a laminate of a nonwoven web layer and a breathable film layer wherein breathability of the composite is provided by a plurality of point-like deformations of the film layer. In one embodiment, the composites also have a soft, cloth-like texture at at least one surface thereof. Also provided is a process for making such composites comprising applying a molten film-forming resin composition capable of developing breathability on deformation to a nonwoven web, cooling the molten composition to form a coated web having a web layer bonded to a film layer, and subjecting the coated web to heat and pressure at a plurality of points on a surface thereof wherein the heat, pressure and density of, and proportion of the composite surface occupied by, the deformations are effective to impart breathability to the film without loss of liquid barrier properties.

Abstract: Described herein is a composition comprising an epoxy resin containing at least one glycidyl amine group wherein the resin contains three or more epoxide groups per molecule and a particular aromatic amine hardener. These compositions possess the necessary balance of properties required for making prepreg and afford unreinforced castings with high moduli and strength.

Abstract: Described herein are compositions containing (a) a cycloaliphatic epoxy resin, (b) an aromatic amine hardener, and (c) a particular cure accelerator. These compositions afford unreinforced castings with a high level of mechanical properties and improved heat deflection temperatures.

Abstract: Described herein are compositions useful for the preparation of high modulus matrix resins for composites comprising a cycloaliphatic epoxide and a particular modifier.

Abstract: Described herein are resinous compositions comprising a particular cycloaliphatic epoxy resin and the adduct of these epoxy resins with an aromatic active hydrogen-containing compound. These compositions afford unreinforced castings with higher heat deflection temperatures, faster cure rates, and reduced water uptake than similar compositions containing epoxy adducts made from aliphatic polyols.

Abstract: Matrix resin formulations comprising cyanate esters of phenol adducts of dicyclopentadiene, epoxy resins and particular thermoplastics, provide fiber reinforced composites with excellent toughness and hot/wet properties.

Abstract: Prepreg comprising structural fiber and matrix resin formulated from epoxys selected from the group consisting of polyglycidyl ethers of polycyclic bridged hydroxy-substituted polyaromatic compounds and N,N,N',N'-tetraglycidyl-bis(4-amino-3-ethylphenyl) methane with from about 6 to about 150 pbw, per hundred parts by weight of the epoxy resin components, of a solid aromatic diamine hardener insoluble in said composition in an amount effective to cure said epoxy resin exhibiting improved storage stability characteristics at room temperature.

Abstract: Epoxy resin formulations having improved storage stability comprising epoxys selected from the group consisting of polyglcidyl ethers of polycyclic bridged hydroxy-substituted polyaromatic compounds and N,N,N',N'-tetraglycidyl-bis(4-amino-3-ethylphenyl) methane with from about 6 to about 150 pbw, per hundred parts by weight of the epoxy resin components, of a solid aromatic diamine hardener insoluble in said composition at room temperature in an amount effective to cure said epoxy resin.

Abstract: Fiber reinforced composite structures based on epoxy resin formulations having a phase-separated or multiphase morphology when cured are effectively toughened by adding preformed carboxylated rubber particles to the matrix resin prior to curing the composite.

Abstract: Layered, fiber-reinforced composites are toughened by the use of thermosetting matrix resins including polyphenylene ether particles. The method of the invention is particularly effective in improving the toughness of composites based on thermoset matrix resins.

Abstract: Preformed carboxylated rubber particles are effective for toughening fiber reinforced composite structures based on thermoset resins such as epoxy resin formulations. The composites are effectively toughened by adding the carboxylated rubber particles to the matrix resin prior to curing the composite.

Abstract: Preformed carboxylated rubber particles are effective for toughening fiber reinforced composite structures based on thermoset resins such as epoxy resin formulations. The composites are effectively toughened by adding the carboxylated rubber particles to the matrix resin prior to curing the composite.

Abstract: Fiber-reinforced compositions comprising a structural fiber and a cyanate ester resin formulation having an N-substituted urea compound as a latent cure accelerator provide rapid-curing prepreg with good out-time characteristics. The prepreg may be used to form composite articles with good toughness and excellent retention of properties on extended exposure to moisture at elevated temperatures.