Abstract: A non-woven cellulose ester fibrous filter sheet material comprising cellulose ester staple fibers and cellulose ester fibrets which exhibits improved filtration properties and the method of its preparation.

Abstract: A non-woven cellulose ester fibrous filter sheet material comprising cellulose ester staple fibers and cellulose ester fibrets which exhibits improved filtration properties and the method of its preparation.

Abstract: Improved tobacco smoke filters, particularly cigarette filters, are prepared from a web of synthetic polymeric fibers having applied to at least one surface thereof a film-forming derivative of cellulose. Continuous processes and apparatus for the production of the web and filter are also described.

Abstract: Conductive thermoplastic sheath/core filaments having a reflectivity greater than 8 percent in the undelustered filament and fiber blends containing at least some of said conductive filaments. The sheath/core filament employs as a core a thermoplastic polymer having dispersed therein a material selected from the group consisting of zinc oxide, cuprous iodide, colloidal silver and colloidal graphite. The conductive filament when blended with nonconductive filaments is found to have utility as face yarns in pile fabrics.

Abstract: A melt extrusion process for producing a low density open cell filtering element for an aerosol such as tobacco smoke from plasticized cellulose acetate. A mixture of cellulose acetate, plasticized, a volatile liquid blowing agent which is at least a partial solvent for the cellulose acetate and a nucleating agent are melt extruded under conditions wherein the melt is subjected to high shear, the loss of the blowing agent through back flow is prevented, the melt is reduced in temperature prior to extrusion and the extrudate is conditioned in a hot air chamber and then sized in a sizing die.

Abstract: Process and apparatus for cutting filamentary material using apparatus comprising a reel fitted with a plurality of spaced outwardly facing knife blades against which the material to be cut is wound and then severed by applied pressure, wherein entanglement of cut fibre is reduced or obviated by impingement against a divergent surface attached to and rotating with the cutter reel.

Abstract: A continuous, carrierless dyeable polyester fiber and the process for its preparation is set forth. The fiber is produced from a polymer obtained by producing a melt blend system comprising a homogenous blend of (a) not less than 78 percent by weight of poly(ethylene terephthalate) copolymerized with major amounts of a dicarboxylic acid other than terephthalic acid and (b) minor amounts, that is to say, quantities less than that of said dicarboxylic acid, of a homopolymer selected from the group consisting of poly(trimethylene terephthalate), poly(tetramethylene terephthalate), poly(pentamethylene terephthalate), poly(hexamethylene terephthalate), poly(heptamethylene terephthalate), poly(octamethylene terephthalate), poly(nonamethylene terephthalate) and poly(decamethylene terephthalate).

Abstract: A resilient drawn polyester textile fiber comprised of at least 50 mol percent of poly(tetramethylene terephthalate) with a bending recovery of at least 55 percent and a toughness of at least 0.75 grams/denier is provided. This fiber, which preferably consists essentially of 100 mol percent poly(tetramethylene terephthalate) and has an initial modulus of less than 350 k.g./mm.sup.2 and a tensile factor of at least about 21, is especially useful in pile fabrics.

Abstract: Process and apparatus for transferring heat between an advancing filamentary yarn and a fluid in which the yarn is passed through a vortex in the fluid substantially along or parallel to the longitudinal axis of the vortex.

Abstract: Certain halogenated aromatic polyester fibers having reduced spin-line static generation when prepared via dry-spinning from a methylene chloride containing solution are provided by admixing an esterified hindered phenol prior to dry-spinning. A preferred esterified hindered phenol which may be utilized to reduce spin-line static is tetrakis[methylene 3-(3',5'-di-t-butyl-4-hydroxyphenyl) propionate] methane.

Abstract: A process and apparatus for the continuous production of heat-set, crimped, thermoplastic filaments by passing a tow of filaments through a stuffer box crimper and then a heat setting device attached to the exit of the crimper. The tow in the crimping chamber is cooled to a temperature not exceeding 100.degree. C in order to separate the heat setting and crimping processes, whereby the crimp ratio may be varied by adjusting the temperature of the tow in the crimping chamber.

Abstract: A continuous process for producing high molecular weight polyester of fiber-forming quality is described. The process includes the direct esterification of a dicarboxylic acid with a glycol to yield a prepolymer mixture of ester and low molecular weight polyester condensable under conditions of elevated temperature and vacuum into polymer of high intrinsic viscosity.

Abstract: A conductive fibre having soil-hiding properties and good dye light fastness properties comprising a fibre-forming polyamide having an additive dispersed therein as a separate phase, the additive being derived from a boric acid and a poly(oxyalkylene) material of average molecular weight at least 600. The soil-hiding properties are produced on scouring the fibre.

Abstract: A polyethylene terephthalate composition comprising highly polymeric polyethylene terephthalate and in an amount sufficient to prevent color degradation of said polyethylene terephthalate (1) a trihalide or tri (pseudohalide) of antimony, and (2) an organic oxo compound of phosphorus.

Abstract: Method and apparatus for doffing filled yarn packages from a metier and donning empty package is disclosed. The apparatus includes an upper frame and a lower frame which are mounted together on a track extending along the length of the metier. Each frame includes an arm operable to swing the package away from the cam and an arm for engaging the yarn, severing the yarn and throwing on the yarn ends after the filled package has been replaced with an empty package. The apparatus includes controls for coordinating the movements of the various components.

Abstract: An apparatus for testing tobacco smoke filter rods and similar articles of varying lengths for pressure drop across the opposed ends of a rod encapsulated in an air-impervious sleeve comprising a housing having a longitudinal bore, a rod receptacle having an air-impervious encapsulating sleeve mount therein, slideably mounted in the bore, a hollow rod stop stationarily mounted in the bore and extending into the sleeve of the rod receptacle, means for expanding the air-impervious sleeve, vacuum means communicating with the hollow interior of the rod stop and means for measuring the pressure drop interposed between the vacuum means and the hollow rod stop.

Abstract: A process for disc type friction false twisting, the disc having an inorganic yarn-engaging surface, with a critical surface texture of more than 75 and less than 400 peaks of at least 50 microinches in height per linear inch and a hardness greater than 975 on the Knoop.sub.100 scale. Preferably, the apparatus is an intermeshing disc friction false twist apparatus.

Abstract: A conductive fiber having soil-hiding properties and good dye light fastness properties comprising a fiber-forming polyamide having an additive dispersed therein as a separate phase, the additive being derived from a boric acid and a poly(oxyalkylene) material of average molecular weight at least 600. The soil-hiding properties are produced on scouring the fiber.

Abstract: Synthetic fibers, such as filaments and yarns, of enhanced processability by virtue of a non reactive finish thereon including a fatty acid ester or mineral, animal or vegetable oil lubricant; an end capped emulsifier of a condensate of a long chain ester, alcohol, amide and/or a hydroxy-terminated, alkyl-substituted aryl; and, if desired, a small but effective amount of a salt of a dialkyl sulfosuccinic acid.

Abstract: Apparatus and process for intermingling a synthetic continuous filament multifilament yarn at substantially any point on a synthetic filament yarn threadline by subjecting the yarn to simultaneous action of two opposed fluid jets which are radial and perpendicular to the yarn threadline. The apparatus has a yarn processing bore which is circular in cross-section and has a length to diameter ratio of from 1 to 2 to 2 to 1. The air entry ports of the apparatus are radial to the bore and opposed to each other in a common plane which is substantially perpendicular to the longitudinal axis of the bore.