摘要:
L'invention concerne un procédé pour l'obtention d'un fil (7) à torsion alternée, obtenu en faisant varier de façon intermittente la longueur de remontée de torsion en amont d'un organe de fausse torsion (5). Le procédé selon l'invention se caractérise par le fait :
- que la variation de longueur de remontée de torsion est réalisée sans freinage du fil et est obtenue au moyen d'un bloqueur (8) agissant de façon intermittente en un point situé le plus près possible de l'élément communiquant la fausse torsion (5). - et que la durée d'action du bloqueur (8) correspond sensiblement à la durée que met un point considéré du fil (2) pour franchir la distance D comprise entre l'organe délivreur (2) et l'organe de fausse torsion (5).
摘要:
A core yarn supplying unit (50) adapted to supply a core yarn (c) includes a tension applying section (60) adapted to apply a tension to the core yarn (C); and a core yarn feeding section (90) adapted to feed the core yarn (C) towards a front top roller 19a, wherein a feeding path of the core yarn (C) in the core yarn feeding section (90) is arranged on a straight line connecting an inlet region and an outlet region of the feeding path.
摘要:
A spinning unit (2) includes a draft device (6), a pneumatic spinning device (7), a core yarn supplying device (200), a winding device (13), a splicer (26), and a suction mouth (28). The winding device (13) is adapted to perform a first unwinding operation to unwind a spun yarn (Y) having a core yarn (C) from a package (P) by reversely rotating the package (P) when the suction mouth (28) is performing a yarn guiding operation. The winding device (13) is adapted to perform a second unwinding operation to unwind the spun yarn (Y) from the package (P) by reversely rotating the package (P) after the suction mouth (28) finishes the yarn guiding operation and before the splicer (26) starts the yarn joining operation. The suction mouth (28) sucks the spun yarn (Y) from the package (P) while a reverse rotation mechanism (33) is performing the second unwinding operation.
摘要:
Yarn (1, 2, 4, 6) comprising a core (8) that comprises a filament (10) that extends along a filament axis (X) and that is at least partially coated by a fluoro-polymer layer (12), a first covering (14) of the core (8), obtained by winding at least one first yarn (16) or a first sliver (18, 18') in a first winding direction, so as to achieve a closed coiling, at least a part of the first yarn (16) or first sliver (18, 18') being incorporated in the fluoro-polymer layer (12) so as to anchor the first covering (14) to the filament (10).
摘要:
A core yarn supplying unit (50) adapted to supply a core yarn (c) includes a tension applying section (60) adapted to apply a tension to the core yarn (C); and a core yarn feeding section (90) adapted to feed the core yarn (C) towards a front top roller 19a, wherein a feeding path of the core yarn (C) in the core yarn feeding section (90) is arranged on a straight line connecting an inlet region and an outlet region of the feeding path.
摘要:
A core yarn supplying unit (50) includes a tension applying section (60); a slack applying section (70); a core yarn feeding section (90); a relay board (84) electrically connected to each of the tension applying section (60), the slack applying section (70), and the core yarn feeding section (90); and a unit base (51) adapted to support the tension applying section (60), the slack applying section (70), and the core yarn feeding section (90), as well as the relay board (84).
摘要:
A continuous spin-draw-winding process to prepare a drawn polyester yarn suitable for use in high-speed tires and run-flat tires having high energy to break in combination with a good dimensional stability, comprising extruding molten polyester through spinning holes in a spinneret to form a bundle of molten spun filaments, solidifying the spun filaments by a gaseous cooling medium, fixing the spinning speed of the solidified filaments at a first godet in the range of 4050 to 5000 m/min, drawing the solidified filaments to a winding speed in the range of 6800 to 8000 m/min to form drawn filaments. The drawn polyester yarn has a high amorphous orientation distribution, a high crystallinity and a coarse structure. Dipped cords comprising such polyester drawn yarns exhibit excellent dimensional stability at higher temperatures.
摘要:
A protective suit fabric of the present invention is a heat-resistant flame-retardant protective suit fabric, which is formed of a spun yarn. The fiber blend rate is: 25-75 mass% of polyetherimide fiber (A); 20-50 mass% of at least one fiber (B) selected from wool and flame-retardant rayon; and 5 to 25 mass% of para-aramid fiber (C). The spun yarn for forming the fabric is a two-fold yarn (20) prepared by twisting: 1) a single yarn (24) of a uniform blended spun yarn including the fiber components (A) and (B); and 2) a single yarn (23) of a sheath-core spun yarn including a core (21) of stretch-broken spun yarn of the para-aramid fiber (C) and a sheath (22) formed by blend-spinning the polyetherimide fiber (A) and the at least one fiber (B) selected from wool and flame-retardant rayon. The protective suit fabric has high washing resistance. The protective suit fabric provides favorable comfort in wearing even if the suit is worn in the hot seasons or even if the wearer perspires during exertion. The fabric has high heat resistance and high flame retardance, favorable dye affinity, and the fabric can be produced at a low cost. Also a spun yarn used for the fabric is provided.
摘要:
A continuous spin-draw-winding process to prepare a drawn polyester yarn suitable for use in high-speed tires and run-flat tires having high energy to break in combination with a good dimensional stability, comprising extruding molten polyester through spinning holes in a spinneret to form a bundle of molten spun filaments, solidifying the spun filaments by a gaseous cooling medium, fixing the spinning speed of the solidified filaments at a first godet in the range of 4050 to 5000 m/min, drawing the solidified filaments to a winding speed in the range of 6800 to 8000 m/min to form drawn filaments. The drawn polyester yarn has a high amorphous orientation distribution, a high crystallinity and a coarse structure. Dipped cords comprising such polyester drawn yarns exhibit excellent dimensional stability at higher temperatures.
摘要:
Es wird ein Garn (9), insbesondere ein Näh- oder Stickgarn, beschreiben, das die Struktur eines Coregarnes mit mindestens einer aus Multifilamentgarnen (6) bestehenden Seele und einer Umspinnung aus Fasergarnen (1) aufweist. Mindestens ein Anteil der Fasern, die das Fasergarn der Umspinnung ausbilden, ist über ihre gesamte axiale Faserlänge oder über einen Abschnitt ihrer axialen Faserlänge zwischen den Filamenten des mindestens einen Multifilamentgarnes der Seele eingebunden. Desweiteren wird ein Verfahren zur Herstellung dieses Garnes beschrieben.