A continuous process for dyeing yarns with vattable dyes comprises, in continuous yarn dyeing ranges, metering an aqueous dye dispersion into the circulating chemical liquor.

Apparatus for intermingling multifilament yarns, having an intermingling assembly with a thread channel (3; 11), and at least one blowing channel (5', 5"; 6', 6") opening into the thread channel (3; 11), and capable of receiving compressed air, wherein the cross-section of each blowing channel (5', 5"; 6', 6") increases in the direction of the thread channel (3; 11) and the thread channel (3; 11) for each blowing channel (5', 5"; 6', 6") has a first segment (3') before the opening of the blowing...

The present invention provides load leveling and impact energy absorption webbing comprising warp yarn. If the webbing is used in seat belts, the webbing provides load leveling behavior from about 450 pounds (about 2,000 Newtons) to about 1,800 pounds (about 8,000 Newtons) in vehicle collision. The yarn has a force-displacement profile such that: (a) when the yarn is subjected to an initial barrier stress of from about 0.2 gram/denier to less than or equal to about 1.4 grams/denier, the yarn elo...

A yarn traverse apparatus method in which two sets of an upstream yarn guide engaged with a first reciprocating spiral groove R-turned within a width of a take up traverse above and below a travel direction of a yarn to always guide the yarn and a downstream yarn guide engaged with a second reciprocating spiral groove R-turned beyond the take-up traverse width to guide the yarn at opposite ends of the take up traverse width are arranged.

A process for drawing thermoplastic multifilament yarns, wherein the yarns have different natural draw ratios, at least one of which is greater than the machine draw ratio used in the process. The yarns are first impinged with a hot fluid to heat them to an elevated temperature and then stretched over a set of draw rolls at a single machine draw ratio. In a preferred aspect of the invention, the yarns are crimped after stretching. Preferably, the thermoplastic yarns are either polypropylene or p...

Drawing, especially cold-drawing, or hot-drawing or other heat-treatments of spin-oriented crystalline polyester filaments, and particularly polyester feed yarns, that have been prepared by spinning at speeds of, e.g., 4 kg/min, and have low shrinkage and no natural draw ratio in the conventional sense, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain filaments and yarns of various denier. The resulting uniform ...

A process for producing a conductive supported yarn includes melt spinning non-conductive nylon filaments into a first set of filaments, separating at least one of the filaments from the freshly spun first set into a second set of filaments, providing the second set of filaments to a suffusion coating process so that the suffusion coated second set has a resistivity of between about 10.sup.6 and about 10.sup.9 .OMEGA./cm, and then recombining the first set and the second set to form a supported ...

Improved machine for making chenille yarns wherein the draw/counterdraw rollers (1,3) are mounted on a support (10) vertically oscillating in such ways as to move close to and respectively away from the gauge (2), with an arm (11) having a fine-thread screw register (13) and with stoppage of the rollers (1) before they touch the gauge (2). The shaft (12) of the draw/counterdraw rollers (1,3) is interlocked to a translation device able to adjust the axial position thereof. The rotary disk blade (...

An apparatus and method for deknitting a knitted tape of yarn having a plurality of yarn ends. The apparatus includes a plurality of stationary cylindrical connectors arranged in parallel alignment across the frame structure of the apparatus. One stationary connector, proximate to the knitted yarn receiving end of the apparatus, is positioned parallel to and beside an adjustable cylindrical connector which can be selectively moved closer to or further away from the stationary connector. The adju...

A process for producing yarns that have enhanced resistance to unraveling and linting. The yarns are moved along guides through a needle loom where a series of needles engage the yarns. This engagement of the yarns by the needles causes the fibers of the yarns to become intermixed.