The present disclosure provides composite yarn, apparatus and methods preparing thereof. The composite yarn of the present disclosure includes wrapping fibers and a central yarn that is formed by a first body yarn and a second body yarn, wherein a portion of the wrapping fibers are combined with the central yarn in at least one of the following states: a first state, a portion of the wrapping fibers wrap around the first body yarn or the second body yarn; a second state, a portion of the wrapping fibers wrap around the first body yarn and the second body yarn respectively at the same time; a third state, a portion of the wrapping fibers wrap around the central yarn. The composite yarn of the present disclosure has low twist factor and high strength, which solves the problem of severe strength loss associated with low twist factors existing in conventional low-twist techniques.

A yarn texturizing apparatus and method for texturizing a plurality of yarns, which can include a tack assembly and a jet box assembly. The tack assembly can be configured to receive a bundle of yarns and impart a plurality of twists to each bundle of yarns and subsequently impart a first tack point at a point corresponding to a twist reversal between the twists. The downstream jet box assembly can be configured to place a plurality of additional tack points intermittently along the plurality of twists of each bundle of yarn.

A yarn texturizing apparatus and method for texturizing a plurality of yarns, which can include a tack assembly and a jet box assembly. The tack assembly can be configured to receive a bundle of yarns and impart a plurality of twists to each bundle of yarns and subsequently impart a first tack point at a point corresponding to a twist reversal between the twists. The downstream jet box assembly can be configured to place a plurality of additional tack points intermittently along the plurality of twists of each bundle of yarn.

An aspect of the present disclosure relates to a woven twill textile fabric, the fabric including: from about 90 to about 235 ends per inch warp cotton yarn; and from about 100 to about 2765 picks per inch multi-filament polyester weft yarn, wherein the picks are woven into the fabric in a single or in a group of at least two multi-filament polyester weft yarn, and wherein total content of cotton present in the fabric is at least about 50% by weight of the fabric, further wherein total thread count in the fabric ranges from about 190 to about 3000. The advantageous fabric realized in accordance with embodiments of the present disclosure can find utility as home textiles. Other aspects of the present disclosure relate to a method of manufacturing a draw textured yarn and a multi-ply separable draw textured yarn.

A method includes drawing a roving thread from a roving bobbin through a roving guide, an aft drafting roller, and a mid drafting roller to a front drafting roller, and drawing a spandex core from a spandex bobbin using a guide roller. The method also includes associating the roving thread and the spandex core by drawing the roving thread and the spandex core in an approximately parallel fashion through the front drafting roller, and drawing the associated roving thread and the spandex core through a lappet hook and an anti-ballooning guide. Further, the method includes winding the drawn associated roving thread and the spandex core on a ring-frame bobbin including a ring traveler attached to a rotatable ring. The circular motion of the ring traveler around the ring-frame bobbin causes the drawn associated roving thread to twist around the drawn associated spandex core, forming a core spun yarn.

The invention relates to a friction disc (5) for a false twisting device (1), having a hub (6) comprising a mounting opening (7) for mounting a shaft (4) of the false twisting device (1), and with a race (8) that circumferentially surrounds the hub (6) when the friction disc (5) is used as intended, wherein the race (8) comprises a base body (9) having a uniform cross section about an axis of rotation (RA) of the friction disc (5) and the hub (6) comprises a mounting contour (10) adapted to correspond to the base body (9) of the race (8), and wherein the race (8) and the hub (6) are detachably connected to one another. According to the invention, the race (8) comprises at least one locking section (11) that increases the cross-section of the base body (9) and is delimited along a direction of rotation (DR) of the friction disc (5), and the hub (6) comprises at least one correspondingly adapted recess (12), wherein the locking section (11) of the race (8) and the recess (12) of the hub (6) form an interlocking anti-rotation lock when the friction disc (5) is in the connected state. The invention further comprises a race (8), a use of a race (8), a false twisting device (1), a use of a friction disc (5), and a method for changing a race (8) of a friction disc (5).

Disclosed is a yarn management device in a yarn treatment line downstream of a crimping box and upstream of a thermofixing means for crimping, said device including a fixed support and at least one axial drum positioned upstream of the thermofixing means. In some cases, the inlet of the crimping box is formed by one or more crimping rollers for feeding at least one yarn into the crimping box. The drum is traversed by a yarn in the crimping box and mounted on the fixed support of the device so as to perform a substantially axial rotation, allowing the generation of at least one false twist on the treated yarns.

The present invention provides a cotton-like knitted fabric, a polyester filament and a production method. The fabric is a weft-knitted fabric obtained by material containing at least above 45% by weight of polyester filaments; the pore area distribution of the fabric is centered on 6000 to 22000 m.sup.2 and has a statistical variability of above 2a, and the coefficient of variation of the pore area is greater than 40%. The polyester filament is formed from alternatingly arranged twist regions in a false-twist direction and twist regions in an opposite direction, wherein the twist regions in the false-twist direction have an average length of less than 0.3 cm, a coefficient of variation of length of above 60%, a diameter that is 30% to 70% of the diameter of the twist regions in the opposite direction, and a total length that is 20.0% to 40.0% of the total length of the polyester filaments.

Disclosed are a bundle of hollow fiber membranes to improve use efficiency of the hollow fiber membranes and a method of manufacturing the same. The bundle of hollow fiber membranes includes a plurality of yarns to form fluid channels and serve as spacers disposed between the hollow fiber membranes to create a bundle. The method includes spinning including supplying a spinning dope to a nozzle and conducting spinning to form a plurality of hollow fiber membranes, coagulating the hollow fiber membranes formed during spinning, and yarn feeding including inserting a plurality of yarns between the hollow fiber membranes to form a bundle. The method is effective in uniformly distributing a fluid through fluid channels formed between the hollow fiber membranes and maximizes usage efficiency of the hollow fiber membranes.

A method includes drawing a roving thread from a roving bobbin through a roving guide, an aft drafting roller, and a mid drafting roller to a front drafting roller, and drawing a spandex core from a spandex bobbin using a guide roller. The method also includes associating the roving thread and the spandex core by drawing the roving thread and the spandex core in an approximately parallel fashion through the front drafting roller, and drawing the associated roving thread and the spandex core through a lappet hook and an anti-ballooning guide. Further, the method includes winding the drawn associated roving thread and the spandex core on a ring-frame bobbin including a ring traveler attached to a rotatable ring. The circular motion of the ring traveler around the ring-frame bobbin causes the drawn associated roving thread to twist around the drawn associated spandex core, forming a core spun yarn.