Abstract: In a method for the production of industrial filament yarns, by swirling a polyester multifilament at increased temperature, under a thread traction force of less than 140 cN, in an air-loaded swirl nozzle consisting of a nozzle body with a perforated plate and a baffle plate, the heat is directly transmitted to the polyester multifilament and the air is directly transmitted, via the nozzle body, to a highly heat-conductive metal block which is connected directly to the baffle plate and in which a bore is provided for receiving a heating body.

Abstract: The invention concerns a method for making industrial continuous filament yarn by entangling a polyester multifilament yarn at high temperature, under yarn traction force less than 140 cN. By means of a tangling cop tube consisting of a body (1) provided with a perforated plate (2) and a deflection plate (3), heat is directly transmitted to the polyester filament and the air passing through the cop tube body (1) is directly transmitted to a metal block (8) with high thermal conductivity directly connected to the deflection plate (3). In the device for implementing said method, the deflection plate (3) is directly connected to a metal block (8) with high thermal conductivity, wherein a bore (7) is provided for housing a heating element. The polyester continuous filament designed for spinning applications, with a yarn count of 500-2000 dtex, has a resistance of at least 70 cN/tex for a breaking elongation less than 24%, and a knot strength higher than 80% and a spacing between 2 knots more than 4.0 cm.

Abstract: The process for production of a heat-stable and light-fast product consisting of multifilaments, monofilaments or flock for textile and industrial applications includes mixing from 0.2 to 0.5% by weight, based on the amount of product, of a UV absorber having a melting point of from 135 to 145° C. and a colorant having a melting point greater than 180° C. with a polyester powder at room temperature to form a starting mixture; feeding from 1 to 100% of the starting mixture and from 0 to 99% by weight PET granules into a cooled feed zone of a twin-screw extruder; operating the twin-screw extruder to melt, knead and homogenize the feed to form polymer strands, which are then cooled and cut to form a compound; and subsequently melt-spinning the compound to form the product. When the product is made by this method the UV absorber is incorporated in the product, thus avoiding the additive-related manufacturing problems.

Abstract: The process for preadherizing a drawn polyester filament to improve adhesion of rubber material with the filament includes applying a preadherizing agent to a running drawn polyester filament. The preadherizing agent is made by mixing a first solution containing a polyepoxide and a second solution containing a tertiary amine. In order to minimize soiling of the applicators used to apply the solutions to the running drawn polyester filament, the first solution is applied to the running drawn polyester filament at a site spaced a predetermined distance from the site at which the second solution is applied.

Abstract: The process produces vacuole-free coarse polyamide monofilaments having diameters of from 0.8 to 1.5 mm. It includes preparing a mixture including from 75 to 85 percent by weight polyamide 66 and from 25 to 5 percent by weight polyamide 6; immediately after preparing the mixture, extruding and spinning it to form crude monofilaments and after the extruding and spinning, cooling down the crude monofilaments in a liquid. Addition of at least 30 ppm of Cu to the mixture prior to extruding and spinning produces heat-protected coarse monofilaments.

Abstract: Industrial yarn PA 6.6 comprised of filaments having a global yarn count of at least 900-2100 tex, which is made by submitting wet granulate PA 6.6 to a melt spinning-drawing process, is characterized by a strength of >84 cN/tex for less than 1.5 linters/1 km. Said yarn is used preferably in the production of cord fabric with a rubber ply.

Abstract: The invention relates to a filling yarn made of a thermally protected polyamide 66 multifilament for a tire cord fabric.

Abstract: The woven fabric for an airbag, a filter, a sail, a parachute or a paraglider is woven from a multifilament yarn having a yarn linear density between 30 and 1000 dtex. The multifilament yarn is a mixture of coarse filaments having a linear density of 5.5 to 8 dtex and fine filaments having a linear density of 2.5 to 4 dtex. The coarse filaments are mixed with the fine filaments in a ratio of from 1:1 to 1:5. The yarn can be made by a melt-spinning method using a spinneret with coarse holes and fine holes for the coarse and fine filaments disposed in an alternating arrangement. The filament may be made of polyamide, polyester or polypropylene.

Abstract: The device for on-line detection of structural faults in moving flat textile materials includes a spade-like leaf spring contact sensor (2) having a length of from 5 to 20 cm which is advantageously rounded and/or chamfered for engagement with threads in the flat textile materials; a mounting device (5) for mounting the spade-like leaf spring contact sensor (2) so that the contact sensor is at a positioning angle of 10 to 60.degree.

Abstract: The method of producing an industrial yarn at a production speed of from 3000 to 6000 m/min includes melt-spinning a plurality of polyester filaments; stretching a thread made from the filaments by means of a delivery assembly (1) and a drawing roller system (2); providing at least one thread-braking device (3) including at least one deflecting roller (31, 32) between the delivery assembly (1) and the drawing roller system (2); deflecting and decelerating the thread between the delivery assembly and the drawing roller system by means of the at least one thread-braking device (3) and looping the thread only once around the at least one deflecting roller (31,32) of the at least one thread-braking device (3). The at least one deflecting roller (31, 32) is braked to a circumferential speed (v.sub.3) given by the following formula v.sub.3 =v.sub.1 +(v.sub.2 -v.sub.1)* F, wherein 0.5.ltoreq.F<1, v.sub.1 =the delivery assembly speed and v.sub.2 =the drawing roller system speed.

Abstract: A process for producing high strength, high shrinkage nylon 66 filament yarn for industrial fabrics formed as airbag fabrics, the process having the steps of drawing of a nylon 66 LOY filament yarn having a relative viscosity RV of at least 40 by at least three heatable draw roll units, winding the drawn yarn onto a cylindrical yarn support, and at a relaxation ratio of 4 to 10% setting a temperature of a last draw roll unit before winding to between 70.degree. C. and 160.degree. C., and setting a winding tension to less than 0.2 cN/tex.

Abstract: The monofilament for precision woven fabrics is made of a polyethylene terephthalate/polydialkyl siloxane copolymer having a silicon content from 0.05 to 2.0 percent by weight, a polyethylene terephthalate proportion of at least 85% by weight, a diameter from 0.01 to 0.1 mm, an elongation at break of less than 30%, a strength of at least 45 cN/tex, a modulus of elasticity at 5% extension greater than 500 cN/tex and a fibrillation characterizing parameter from 0.0 to 0.5.

Abstract: The process for single-stage postcondensation of a polycondensate in a fluidized bed reactor (1) includes feeding the polycondensate through the fluidized bed reactor (1); circulating a main stream of nitrogen carrier gas through the fluidized bed reactor; withdrawing a fractional stream at a temperature of from 20.degree. to 230.degree. C. from the main stream of the nitrogen carrier gas; passing the fractional stream through a water-filled gas scrubber column (15) so as to form a conditioned stream of the nitrogen carrier gas with a predetermined dew point between 10.degree. to 80.degree. C.; and returning the conditioned stream to the main stream. In preferred embodiments the polycondensate is allowed to cool during a cool-down stage at an end of the postcondensation and the withdrawal of the fractional stream from the main stream is halted, but the circulating of the main stream through the fluidized bed reactor is continued during the cool-down stage.