The present invention refers to yarns made of hollow trilobal cross section filaments, comprising from 90 to 99% of polypropylene, and between 1 and 10% of other polyolefin resins, for the application on dental floss. This invention additionally refers to the production process of the yarns made of hollow trilobal cross section filaments. This invention additionally refers to dental floss comprising hollow trilobal cross section filaments, and the use of hollow trilobal cross section filaments for the manufacture of dental floss. The yarn described in this invention has linear density or title in the range from 400 to 1200 dtex, and it is twisted with a twist level from 10 to 160 twists per meter.

Provided is a composite twist color fiber formed by joining polypropylene terephthalate (PPT) and cationic-dyeable polymer side by side. The polypropylene terephthalate (PPT) and the cationic-dyeable polymer differ in contraction rate, such that the composite fiber thus formed is not only helical but also extensible and contractile. Fabric made of the composite fiber is highly capable of elongating and retracting; hence, not only do finished products made of the fabric have low contraction rate, but surface of the fabric also exhibits satisfactory mixing tones.

This weaving machine (2) is for simultaneously weaving top and bottom pile fabrics (F2, F4) presenting some pile patterns (P2, P2′, P4) and including tufts, made from warp yarns (24), binding warp yarns (14, 16) and inwoven weft yarns. This machine includes a pile warp yarns feeding unit (20), a binding warp yarns feeding unit (18), a shedding unit (6) and a weft insertion unit (8) for inserting the weft yarns in the shed. The machine also includes a beating-up mechanism (32), a take up system (70), a drawing-in unit (26), and a control unit (80). A treatment unit (90) is located, along a path of the pile warp yarns (24), between the pile warp yarns feeding unit (20) and the shedding unit (6), for applying different segments of treatment on at least some of the pile warp yarns (24).

A process is provided for the manufacture of an effect yarn, such as heathered helix yarns, for use in carpets, floorcoverings, and textile articles. The effect yarns contain patterned alternating sections of twisted multiple singles yarns and sections of entangled multiple singles yarns. More particularly, these effect yarns may comprise a plurality of S-direction twist sections, a plurality of Z-direction twist sections, and a plurality of non-twisted entangled sections interspersed between the S-direction twist sections and the Z-direction twist sections.

A process is provided for the manufacture of an effect yarn, such as heathered helix yarns, for use in carpets, floorcoverings, and textile articles. The effect yarns contain patterned alternating sections of twisted multiple singles yarns and sections of entangled multiple singles yarns. More particularly, these effect yarns may comprise a plurality of S-direction twist sections, a plurality of Z-direction twist sections, and a plurality of non-twisted entangled sections interspersed between the S-direction twist sections and the Z-direction twist sections.

A knitting yarn used for forming a knitted product without using any knitting tools, such as crochet hooks or knitting needles. The knitting yarn includes a core thread having a length dimension and a plurality of loops affixed to the core thread, at least a first thread and at least a second thread having different structural and/or physical properties than each other; and the loops of the knitting yarn are made of the first thread, and the core thread is made of the second thread.

Aspects herein are directed to using a space-treating process to apply functional finishes to a yarn and incorporating the treated yarn into a textile and/or a garment to impart engineered functional properties to the textile and/or garment.

Aspects herein are directed to using a space-treating process to apply functional finishes to a yarn and incorporating the treated yarn into a textile and/or a garment to impart engineered functional properties to the textile and/or garment.

A drawing and spinning apparatus of mixed yarns for air spinning machines with multiple feeds comprises at least a first and a second introducer element, an air spinning device, a drawing device, interposed between the introducer elements and the air spinning device, an air spinning chamber, an introducer nozzle shaped to receive the webs from the drawing device into respective insertion channels and introduce the webs into the spinning chamber according to a longitudinal feeding direction. With respect to a cross-section plane perpendicular to the longitudinal feed direction, groove bottoms of each of the two insertion channels of the webs into the chamber are aligned along a segment which is offset by an eccentricity with respect to a geometric centre of the chamber itself, through which a symmetry axis of the spinning chamber passes, the eccentricity being less than 5% of a maximum diameter of the spinning chamber.

A drawing apparatus for air spinning machines with multiple feeds includes independent introducer elements that feed simultaneously at least two separate slivers of textile fiber. A first drive roller intercepts a first sliver and a second drive roller intercepts the second sliver. The drive rollers may be operated at different speeds of rotation, to perform different degrees of drawing of the two slivers.