Abstract: A self-bonded nonwoven web and porous film composite comprising at least one layer of a self-bonded, fibrous nonwoven web comprising substantially continuous filaments adhered to at least one layer of a polymeric porous film and having vapor-permeable and liquid-impermeable properties.

Abstract: Crystallizable polyphthalamides with a useful combination of thermal and mechanical properties comprising recurring moieties of terephthalic acid, adipic acid, an aliphatic diamine of 4 to 20 carbon atoms and meta-xylylene diamine.

Abstract: Self-bonded nonwoven web and woven fabic composites comprising at least one layer of a uniform basis weight self-bonded, fibrous nonwoven web comprising substantially randomly disposed, substantially continuous thermoplastic filaments adhered to at least one layer comprising woven thermoplastic yarns in the form of woven fabrics such as wall covering fabric, softside luggage fabric and leno weave fabric.

Abstract: A self-bonded nonwoven web and thermoplastic net-like web composite comprising at least one layer of a uniform basis weight self-bonded, fibrous nonwoven web and at least one layer of a thermoplastic net-like web for producing stable fabric useful for carpet backing and packaging applications.

Abstract: Polyolefin resin compositions and oriented microporous films prepared from same comprising an ethylene-propylene block copolymer having an ethylene content of about 10 to about 50 wt %, a propylene homopolymer or random propylene copolymer having up to about 10 wt % of a comonomer of ethylene or an .alpha.-olefin of 4 to 8 carbon atoms, and components selected from a low molecular weight polypropylene, a beta-spherulite nucleating agent and an inorganic filler, and to processes for forming such films wherein the microporous films have improved breathability, strength, toughness and break elongation.

Abstract: A polyamide composition comprising the following recurring units: ##STR1## in proportions such that the mole ratio of the dicarboxylic acid moieties in the A, B and C units is about 49.5-0.5/0-20/0.5-49.5 and wherein R is a divalent radical comprising ##STR2## in a mole ratio of about 0.5-50/49.5-0 and preferably having a glass transition temperature of 90.degree. C. or greater and an oxygen transmission rate of about 2.0 cc-mil/100 in.sup.2 -day-atm or less.

Abstract: A self-bonded, fibrous nonwoven web having a uniform basis weight of about 0.1 oz/yd.sup.2 or greater and improved physical properties, a method for producing same and composite fabrics comprising the nonwoven web useful for applications in for example, hygiene, healthcare and agriculture markets.

Abstract: A porous film composite comprising at least one layer of an oriented polymeric porous film comprising an ethylene-propylene block copolymer having an ethylene content of about 10 to about 50 wt %, a polypropylene homopolymer or random copolymer of propylene having up to about 10 wt % of a comonomer of ethylene or an .alpha.-olefin of 4 to 8 carbon atoms, and at least one component selected from a low molecular weight polypropylene, a beta-spherulite nucleating agent and calcium carbonate adhered to at least one layer of a polymeric foam product, a woven fabric, or a nonwoven fabric such as a carded web of staple fibers, a spunbond fabric, meltblown fabric and a self-bonded, fibrous, nonwoven web.

Abstract: A multi-layer nonwoven web composite comprising at least one layer of a self-bonded, fibrous, nonwoven web bonded to at least one layer of a carded web having improved cross-machine direction tensile strength per unit of composite basis weight and improved rewet properties and processes for producing same.

Abstract: A multi-layer composite of nonwoven fabrics comprising at least one layer of a self-bonded, fibrous, web nonwoven bonded to at least one layer of a microfibrous, nonwoven web having water repellency and water vapor permeability properties particularly suitable for protective apparel applications.

Abstract: An improved multistage ethylbenzene dehydrogenation process comprising feeding steam and a major fraction of a hydrocarbon feed to a first reactor and feeding a remaining minor fraction of the hydrocarbon feed and a product of the first reactor to a second reactor.

Abstract: A modified propylene polymer composition of improved low temperature impact resistance comprising about 55 to about 80 weight percent polypropylene homopolymer, about 15 to about 30 weight percent linear low density polyethylene and about 5 to about 15 weight percent polybutene.

Abstract: Plastic bottles and a process for producing same in which at least one layer comprises a polyamide composition comprising isophthalic acid, terephthalic acid, adipic acid, metaxylylenediamine and hexamethylenediamine moieties in a molar ratio of about 49.5-0.5/0-20/0.5-49.5/0.5-50/49.5-0.

Abstract: An apparatus and method capable of automated flow rate measurements of thermoplastic polymers which includes mechanisms for automatically loading a test polymer into a test cavity of a heating block and mechanisms for automatically cleaning the test cavity and a piston rod movable therein. The test cavity can be provided in the heating block or can be defined by a sleeve/die insert which also serves as a sample receiving cavity and which is movable into and out of a heating block for carrying out a rheological test of polymer material received in the sleeve/die insert.

Abstract: A method for controlling a quench fluid velocity delivered to a quench zone in a polymer melt spinning process wherein the quench fluid velocity is measured by a velocity detector, compared to a desired quench air velocity and a damper valve mechanism is adjusted in a quench fluid duct so that the desired quench fluid velocity is obtained.

Abstract: This invention relates to oriented porous films having cells with polygonal cross sections and average pore diameters of about 5 to about 30 microns and interconnecting pores between the cells which have a diameter of about 0.2 to about 20 microns which are formed from a polypropylene-based resin and a process for forming the film which comprises the steps of forming a film containing beta-spherulites, selectively extracting a portion of the beta-spherulites to form a porous film and stretching the porous film in at least one direction to form the oriented polymeric porous film.

Abstract: The method for separating from a mother liquor containing at least two liquids, one of the two liquids including the steps of:(a) forming a precipitatable complex from one of the liquids and a complexing agent;(b) precipitating the precipitatable complex from the method liquor; and(c) recovering the second liquid from the remaining mother liquor. Typically, the two liquid substances are tetrahydrofuran and toluene and the complexing agent is titanium tetrachloride. The precipitatable complex is TiCl.sub.4.2C.sub.4 H.sub.8 O or TiCl.sub.4.C.sub.4 H.sub.8 O. Preferably, a cooling step is included in the method to enhance the removal of the precipitatabe complex. Superfractionation of the remaining liquor in distillation columns enables one to recover toluene, hexane, titanium tetrachloride and tetrahydrofuran. An apparatus for carrying out the method of recovering solvents in also disclosed.

Abstract: Novel polymers and molding compositions are prepared from acyl halide derivatives of tricarboxylic acids and diamines and about 1 to about 10 percent by weight of phthalic anhydride, trimellitic anhydride or aniline moieties. The polymers are useful in engineering plastics.

Abstract: A lightweight composite cylinder housing is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.

Abstract: The method and apparatus are used to disperse a liquid component throughout a gaseous component and to supply a uniform mixture of components to a heat exchanger in a process for thermal cracking hydrocarbons. The method for supplying the mixture of components from a nonuniform mixture includes several supply steps. First, the nonuniform mixture is separated into liquid and gaseous components. Then, the flow of gaseous component is accelerated to a high velocity. Next, the liquid component is dispersed through the gaseous component in a region of its high velocity flow to obtain a uniform mixture. Finally, the uniform mixture is supplied to the heat exchanger through an outlet conduit.The method is preferably accomplished with an assembly that is fabricated from a number of components. An inlet conduit supplies the gaseous component to a venturi which accelerates the flow velocity of the gaseous component in the assembly. A liquid supply conduit provides the liquid component to an atomizer in the assembly.