Abstract: Spinneret having an orifice defined by two intersecting slots and each intersecting slot in turn defined by three quadrilateral sections connected in series: the middle quadrilateral section of each intersecting slot having a greater width than the other two quadrilateral sections of the same intersecting slot and intersecting the other intersecting slot at its middle quadrilateral section to form therewith a generally X-shaped opening, with each of the other two quadrilateral sections of each intersecting slot being longer than the middle quadrilateral section of each intersecting slot; and a four-winged filament cross-section extruded through the aforedescribed spinneret orifice.

Abstract: A polyester multi-filament yarn having uneven thickness along the length, comprising a bulged portion in which a part of filaments are separated or bulged out from the yarn surface, and at least a portion of the filament composing the bulged portion has a wrinkled area disposed intermittently along the length of the filament, each area being formed of a plurality of corrugations created by upheaval of the surface of the filament, each corrugation encircling substantially the entire periphery of the filament perpendicular to the axis of the filament. The yarn is suitably utilized for manufacturing a fabric having a raw silk touch.

Abstract: Scalloped-oval cross-section for low denier filaments of partially-oriented polyester for new draw-texturing feed yarn, and a new process of draw-texturing to prepare corresponding polyester textured yarns for use in combination spun yarn/textured polyester yarn fabrics, and such combination and other new fabrics.

Abstract: A yarn containing hollow synthetic polymer filaments having an outside diameter ranging from 0.02 to 0.20 mm is provided. The yarn has a filament to yarn strength translation efficiency of at least 98 percent and a yarn to cord strength translation efficiency of at least 90 percent. The yarn has utility in medical products, self-buoyant assemblies, ropes and braids, filtration fabrics, textured products, tire cord and ballistics.

Abstract: A yarn of a synthetic, fibre-forming, polymeric material comprising a plurality of filaments having a substantially rectangular cross-section and having a birefringence assymetry across the width of the filaments, each of the filaments being twisted about the longitudinal axis of the filament in such a manner that the overall lateral dimension of the twisted filament corresponds substantially with the length of the rectangular cross-section of the filament.

Abstract: Textile yarn having a staple yarn character and including continuous filaments with each continuous filament being formed into coils, loops or whorls at random intervals along its length, each continuous filament having a main body section with a portion thereof along the length of the main body section being intermittently separated from the main body section and a fraction of the intermittently separated portion being broken and providing free ends extending from the main body section.

Abstract: Continuous filament yarn of textile utility has slubs formed at randomly spaced intervals along the length of the yarn, with each filament having a main body section extending along the length of the filament and at least one wing member extending from the main body section along such length, the wing member of the filament rising and falling in wave-like manner along the main body section only within the area of the aforementioned randomly spaced intervals.

Abstract: Trilobal synthetic carpet filaments in a specified range of modification ratios and related arm angles exhibit a unique combination of high bulk and high sparkle.

Abstract: Polyester polymer is extruded through converging capillaries at different speeds to merge and form a combined stream. The stream is cooled to form a filament, which is withdrawn at a high speed. A plurality of such filaments are combined into yarn which self-crimps upon heating. In some embodiments, the yarn has a variable denier.

Abstract: The invention relates to a process for making texturized multifilament yarns having profiled polyester filaments, by means of draw false twist texturizing, wherein feed yarns which are multifilament yarns having a high pre-orientation which corresponds to a birefringence of more than 65.times.10.sup.-3 are simultaneously drawn and false twist texturized without a reduction of the twist number but at temperatures which are no more than 30.degree. C. above the glass transition temperature (second order transition temperature) of the polymer and to the resulting luster yarns, the cross-section profiles of which are largely retained in this special texturizing process.

Abstract: A blend of crimped trilobal carpet fibers, each having a modification ratio and denier within specified ranges are provided. Carpets made from the fiber blend have an excellent overall balance of firmness, cover and luster.

Abstract: A continuous filament having a special geometrical cross-section to give controlled fracturability so as to produce free protruding ends, multifilaments of which produce yarns coming within the scope of U.S. Pat. No. 4,245,001; the cross-section of the textile filament having a main body section and one or more wing members connected to the body section, the body section comprising about 25 to about 95% of the total mass of the filament and the wing member or wing members comprising about 5 to about 75% of the total mass of filament, with the filament being further characterized by a wing-body interaction (WBI) defined by ##EQU1## where the ratio of the width of the filament cross-section to the wing member thickness (L.sub.T /Dmin) is .ltoreq.30.

Abstract: A polymeric antistatic agent suitable for use in a polyester fiber, the antistatic agent is a polyester containing azelaic acid units and 2,2-dimethyl-1,3-propanediol units, and capped polyether units where the cap is ##STR1## or --C.sub.x H.sub.2x+1 and X is 12 to 16. The antistatic agent preferably contains tetra alkyl phosphonium isophthalate units. Polyester fibers containing these antistatic agents is also disclosed.

Abstract: A composite multiple strand or filament twisted fishnet twine (11, 11') formed of synthetic material, methods for forming the same, and fishnets (10) formed therefrom, characterized in the use of a plurality of relatively fine, small diameter synthetic filaments (15.sub.a -15.sub.n) which may be on the order of 210 denier and which are twisted together in one of an "S" or a "Z" configuration to form a first multiple filament "B" strand (15) which is thereafter twisted with a plurality of relatively thick monofilament "A" strands (14.sub.a -14.sub.n) formed of synthetic material with either a "Z" or an "S" twist to form a coreless twine (11, 11') in which all of the "A" and "B" strands (14.sub.a -14.sub.n and 15) are of equal length per unit length of the twine (11, 11') and the individual fibers (14.sub.a -14.sub.n) and (15.sub.a -15.sub.n) are all exposed on the outer surface of the twine along substantially the entire lengths of the individual fibers.

Abstract: Filament yarns composed of multicomponent fibers of the matrix/segment type are produced and processed into textile fabrics by false-twist texturing the multicomponent fibres made up of segments of varying deniers to cause softening the matrix to bond the filaments together over short, medium or longer sections of the yarn. After conversion of the yarns into fabrics, the fabrics are subjected to a shrinking treatment. The fabrics so treated have a reduced tendency to crease or wrinkle, better crease recovery and better dyeing properties. The denier of the lower denier segments should be finer than 0.6 dtex and the denier of the high denier segments should be at least 1 dtex; the weight ratio of low to high denier segments in the yarn ranges from about 25:75 to about 75:25. The matrix is preferably made of polyamide 6 while the segments are polyethylene terephthalate. The cross-sectional shapes of the fibers may e.g.

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: Spunlike yarns having free ends are made from continuous filament yarn by fluid-jet texturing. The fibrous elements that make up the yarn have irregular and varying cross-sectional shapes, said fibrous elements being forked and merged in a fortuitous manner. The spunlike yarns may also contain fibrous elements that extend substantially continuously throughout the length of the yarn.

Abstract: Thermoplastic synthetic filaments having a properly delustered appearance and an adequate frictional property, comprise 85 to 99% by weight of a thermoplastic matrix polymer and 1 to 15% by weight of a dispersed polymer which is incompatible with the matrix polymer and uniformly dispersed in the form of fine particles in the matrix polymer, and are characterized by numerous fine protuberances consisting of the dispersed polymer and formed in the number of at least 5 per 10 .mu..sup.2 on the peripheral surface of each individual filament, the protuberances preferably being each in the form of a hemisphere, hemispheroid or hemiellipsoid extending along the longitudinal axis of each individual filament.

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: An improved hollow string comprising a hollow core containing gelatinous oil and a wrapping thread, which is used for rackets for ball games, such as tennis, squash, badminton, etc., and into the hollow cavity of which there is charged gelatinous oil of high viscosity which is in a state of gel at normal temperature and has a melting point of 30.degree. C. or higher and fluidity at a temperature of 50.degree. C. or higher.

Abstract: The quality of a resin-bonded twisted string comprised of three flattened monofilaments in a side-by-side relationship is improved when the monofilaments are precoated with resin prior to twisting and then twisted in a zone wherein the excess lengths of the two outer monofilaments in the twisted configuration is compensated for during twisting by forwarding the two outer monofilaments at a positively controlled speed and allowing the speed of the middle monofilament to be controlled by being drawn into the twisting zone through a roller slot guide at a speed freely determined relative to the speed of the two other monofilaments entering the twisting zone.

Abstract: Methods of making network structures include forming on one side of a sheet of thermoplastic polymer a plurality of parallel continuous main ribs and forming on the other side of the sheet in a different direction a plurality of parallel discontinuous tie ribs. The tie ribs are discontinuous in the areas where they cross over the main ribs to eliminate any increased thickness at the cross-over points of the main ribs and tie ribs. The ribbed sheet thus formed is drawn in either one direction or in two preferably perpendicular directions to open the sheet into a network structure and to orient the main ribs and preferably also to orient the tie ribs.

Abstract: Multifilament yarns comprising continuous multifilaments each having at least one body section and having extending therefrom along its length at least one wing member, the body section comprising about 25 to about 95% of the total mass of the filament and the wing member comprising about 5 to about 75% of the total mass of filament, the filament being further characterized by a wing-body interaction defined by ##EQU1## where the ratio of the width of said fiber to the wing thickness (L.sub.T /Dmin) is .ltoreq.30. Also disclosed are specific yarns and processes for producing the filaments and yarns.The spun-like character of the fractured yarns of this invention is provided by the wing members extending from and along the body section being intermittently separated from the body section and a fraction of the separated wing members being broken to provide free protruding ends extending from the body section.

Abstract: A low denier, high tenacity poly(ethylene terephthalate) fibrillated tape yarn particularly suited for conversion into a sewing thread which exhibits excellent sewing performance is produced by intimately mixing poly(ethylene terephthalate) polymer with from about 0.1 to 20 percent polypropylene based on the weight of poly(ethylene terephthalate), extruding the polymer mixture in the form of a tape through a slit die having a modified entry port wherein the depth of the slit is greater at both ends than at the middle, at a melt draw down of from about 26:1 to about 75:1, quenching said tape, hot drawing said tape in two stages wherein said tape is initially hot drawn to a draw ratio of from about 3.3 to about 4.2 while being subjected to a temperature of from about 80 to about 140 degree centigrade, thereafter hot drawing to a total draw ratio of about 5.0 while heated to a temperature about 160 degrees and thereafter subjecting the tape to fibrillation.

Abstract: A method for producing a spun-like yarn simulating a staple yarn is described wherein continuous filament yarn is produced which has characteristics similar to a staple spun yarn. The unusual continuous filament yarn produced is made by a texturing process which involves the crimping of a continuous synthetic yarn followed by overfeeding to an air bulking means and then to heat setting means. The preferred method utilizes false twist texturing of synthetic filaments such as polyester, nylon, cellulose acetate or cellulose triacetate and mixtures thereof with an air bulking jet interposed to act on the false twist textured yarn while it has a high residual torque and subsequently decaying said torque.

Abstract: There is disclosed a variable denier, multifilament yarn having a slub yarn plied with a carrier yarn and displaying high weaving performance. The yarn is characterized by a certain slub size distribution, a certain minimum number of slubs, a specified maximum number of large slubs, less than one tight spot per meter and a coherency factor of from about 4-14, said coherency factor increasing as the number of large slubs increases. A process for making the yarn is also disclosed and includes the features of feeding both feed yarn and carrier yarn to a supply jet, the feed yarn being overfed while the carrier yarn is maintained under zero net overfeed, forwarding the carrier yarn to a slub jet and forwarding the feed yarn to a foraminous surface where slubs are created and thereafter combining both yarns and passing them sequentially through a slub jet, at least one interlacing jet and, optionally, a torque jet.

Abstract: Disclosed are an improved islands-in-a-sea type multi-core composite filament comprising at least two different polymer components and having a cross-section wherein each island is surrounded by some other islands and most of the islands have an approximately quadrilateral to hexagonal cross-section, and also a process for producing the above-said composite filament.