Abstract: The invention provides an improved partially oriented polyester yarn finish which consists essentially of from about 50 to about 90 weight percent of one or more high molecular weight ethylene oxide/propylene oxide copolymers having an ethylene oxide content such that the ethylene oxide in the copolymer constitutes less than about 25 weight percent of the finish; from about 10 to about 35 weight percent of one or more alkyl chain based lubricants, a major amount of which has a smoke point within the range of from about 155.degree. C. to about 200.degree. C.; and an emulsifying amount of base neutralized fatty acid such as potassium oleate.

Abstract: A method of reducing the number of free carboxyl end groups present in a fiber-forming polymer is given whereby to the polymer minor amounts of a low-boiling oxirane compound such as ethylene oxide are added.

Abstract: Filamentary material is wound upon tubes mounted upon a winder. A traversing guide traverses the filamentary material along the package axis to produce a helical winding thereof. A control mechanism engages the filamentary material prior to completion of a winding sequence to cause the trailing end of the filamentary material to be wound for a plurality of turns in non-helical, close-order relationship on the package to resist subsequent unraveling of the filamentary material. The control mechanism comprises a movable arm which includes a contact edge oriented generally parallel to a plane defined by the traversing movement of the filamentary material. The arm is mounted for movement toward and away from such plane to contact the filamentary material upstream of the traversing guide and displace same out of the latter. The contact edge includes a stop for constraining the filamentary material for winding in a non-helical, close-order relationship onto the package.

Abstract: The invention provides an improved multi-filament polyester fibrous material for incorporation into rubber which bears a topcoat comprising the combination of a dissolved, active isocyanate compound together with an endcapped silicone glycol copolymer. The multi-filament polyester material of the invention exhibits improved initial and long term adhesion to rubber and rubber articles prepared from the material of the invention exhibited improved endurance properties.

Abstract: The invention provides a polyester fibrous material for incorporation into rubber bearing an adhesive activator finish comprising as the active ingredient, an epichlorohydrin ether or ester derived from a polyhydric alcohol or polycarboxylic acid containing up to about 20 carbon atoms. Adhesive activated fibers of the invention can obtain a degree of adherence to rubber equal to or closely approaching adherence provided by epoxy adhesive activated polyester fibers.

Abstract: A doffing/donning apparatus is used in combination with a row of winders each of which winds filamentary material upon a tube carried by a rotary spindle of the winder to form a package. The apparatus comprises a carrier mounted for movement generally parallel to and above the row of winders. A column is mounted on said carrier for horizontal movement. A package exchange arm is mounted on said column for up-and-down movement and is alignable with the winder spindle so that the package can be transferred to the package exchange arm. A tube exchange arm is mounted on the column for up-and-down movement and is alignable with the spindle so that a tube on the tube exchange arm can be transferred to the spindle. A shuttle is spaced horizontally from and vertically above the row of winders, and includes a package transfer arm and a tube transfer arm. The package exchange and tube exchange arms are moved along the column to the level of the shuttle.

Abstract: A guide encloses a group of traveling filaments arranged in a pattern forming a main longitudinal axis. The guide comprises a carrier movable toward and away from the filament group. A plurality of relatively movable members are mounted on the carrier for movement between open and closed positions. Those members form a through-passage for the filament group in the closed position. An actuating mechanism is operatively connected to the carrier and members for extending the carrier toward the filament group, and closing the members around the filaments to converge the filaments. Thereafter, the carrier is retracted to a position where a longitudinal axis of the through-passage is substantially aligned with the main longitudinal axis formed by the filament group.

Abstract: Two molten streams of polyester polymer are extruded at different speeds to intersect below the spinneret. The spinning speed is relatively high, and the resulting filament has shrinkage peaks and valleys along its length. When a number of such filaments are relaxed in a yarn bundle, the yarn spontaneously develops crimp.

Abstract: A yarn having variable denier filaments with thick and thin regions is drawn at a draw ratio selected to break filaments in the thin regions. This may be done while false-twist texturing. The resulting broken ends protrude from the yarn, giving a spun-like yarn.

Abstract: An improved process is provided for the formation of a high performance polyester multifilament yarn possessing a high strength and an unusually stable internal structure rendering it particularly suited for use in industrial applications at elevated temperatures. The filaments are melt spun and uniformly quenched under relatively high stress conditions to yield an as-spun filamentary material of relatively high birefringence which is passed in-line from the quench zone to a first draw zone provided at a temperature below the glass transition temperature of the as-spun filamentary material, for example at ambient temperature, where it is drawn. Subsequent drawing follows to achieve at least 85 percent of the maximum draw ratio of the as-spun filamentary material.

Abstract: Molten polymer streams are separately metered to the individual capillaries of a combined orifice, rendering the yarn produced less dependent on the capillary dimensions.

Abstract: Sintered bauxite particles having defined physical and chemical properties are disclosed as being surprisingly eminently suitable as filtration media for molten polymer, such as polyester polymer. Broadly, the particles have a roundness of at least 0.8, and an API standard mesh size of at least 12; in addition, such particles inherently contain significant amounts of ferric oxide. It is preferred that the sintered bauxite particles (i) be microcrystalline, and therefore sintered under critical conditions; (ii) exhibit high crush strength; (iii) be compaction and fracture resistant up to pressures of 6000 psi by defined permeability tests; and (iv) have an API standard mesh size not greater than 70. Also, the sintered particles may have a microporous internal structure and surface.Also disclosed is an improved annular melt-spinning pack, including a bed of sintered bauxite particles, and means for preventing the bed of free-flowing particles from being deformed during use of the pack.

Abstract: An aspirating cutter severs a traveling yarn and exhausts same to a remote location. The cutter comprises a housing and a hollow suction tube projecting forwardly from the housing. A rearward suction is generated in the suction tube. The suction tube includes first and second slots opening forwardly at the front end of the suction tube, which slots are arranged to receive a traveling yarn. The first slot includes a first cutting edge. An outer tube is rotatably mounted on the suction tube. The front end of the outer tube includes a recess and a projection. The recess is large enough to expose the first and second slots. The projection includes a second cutting edge. When the outer tube is rotated, the first and second cutting edges are moved into a yarn cutting mode to sever a downstream portion of the yarn such that the upstream portion of the severed yarn is sucked into the suction tube. One of the cutting edges is inclined, to produce a scissoring action urging the yarn toward the suction tube.

Abstract: Disclosed is a melt-spinning process of the type wherein molten polymer is extruded downwardly through a fiber pack and through coaxial circular rows of holes of a spinneret to form a circularly arranged group of filaments. Quench gas is directed across the filaments emerging from the spinneret, and the cooled filaments are gathered and redirected at a guide, which may be stationary or rotating. The quench gas is delivered by a conduit extending downwardly through the pack and spinneret coaxially relative to the rows of holes and then redirected and discharged laterally outwardly through the group of filaments above the guide.

Abstract: A spinneret has a number of combined orifices having different nominal dimensions. Yarns spun from such spinnerets have less doff-to-doff average standard deviation of yarn bulk.

Abstract: A novel wholly aromatic polyester is provided which exhibits an anisotropic melt phase and which is capable of readily undergoing melt processing. The polyester of the present invention consists essentially of the recurring units (a) paraoxybenzoyl moiety, (b) bromo-substituted-para-oxybenzoyl moiety, and (c) meta-oxybenzoyl moiety. The resulting polymer may be economically produced. Additionally, it may be melt processed at an advantageous temperature which makes possible the utilization of standard equipment such as that heretofore utilized for the melt processing of polyethylene terephthalate.

Abstract: A textured continuous filament yarn combining a luxuriant, soft hand with improved moisture wicking for greater comfort in garments. Some filaments have a denier which varies at least 25% (preferably 300-500%), and other filaments have a spiral cross-section.

Abstract: A yarn for producing fabrics with a wool-like hand, by combining textured filaments with longer filaments preferably of larger average denier. The longer filaments thus protrude in loops from the yarn bundle.

Abstract: Disclosed is a melt-spinning process of the type wherein molten polymer is extruded downwardly through a filter pack and through an annular array of holes of a spinneret to form a circularly arranged group of filaments. Quench gas is delivered downwardly through said pack and spinneret coaxially relative to said row of holes and the redirected and discharged outwardly through the group of filaments. A finish substance is sprayed onto the filaments, and the filaments are gathered and redirected at a guide. The finish spraying comprises the steps of conducting the finish substance through the pack and through the spinneret internally of the flow of quench gas, and discharging the finish substance outwardly from within the group of filaments at a level below the discharge of quench gas.

Abstract: A guide encloses a group of traveling filaments arranged in a pattern forming a main longitudinal axis. The guide comprises a carrier movable toward and away from the filament group. A plurality of relatively movable members are mounted on the carrier for movement between open and closed positions. Those members form a through-passage for the filament group in the closed position. An actuating mechanism is operatively connected to the carrier and members for extending the carrier toward the filament group, and closing the members around the filaments to converge the filaments. Thereafter, the carrier is retracted to a position where a longitudinal axis of the through-passage is substantially aligned with the main longitudinal axis formed by the filament group.