Abstract:
A polyester tire cord having improved dimensional stability and methods of manufacturing the polyester tire cord are provided. The method includes forming a discharge yarn, extruded while a polyester containing 85 mol % or more of ethylene terephthalate units is melted and passes through a nozzle; forming an undrawn yarn by spinning the discharged yarn; manufacturing a yarn by multistep drawing the undrawn yarn; plying the yarn by twisting; and dipping the plied yard in a dipping solution, and then drying, drawing, and heat-setting the plied yarn before dipping the plied yarn in resorcinol-formaldehyde latex and again drying an heat-setting the plied yarn. An intermediate elongation of the formed polyester tire cord after vulcanization for 20 minutes at 170° C. is E2, an intermediate elongation of the polyester tire cord before vulcanization is E1, and a difference between E2 and E1 is ΔE. ΔE divided by E1 is 0.5 or less.
Abstract:
Included are close-couple twisting and heat-setting apparatus, methods of twisting two or more yarns and heat-setting twisted yarn. The apparatus and methods described permit operation at twisting speeds of about 10,000 to 100,000 rpm. In the event that yarn twisting is interrupted, and accumulating system is also included to prevent interruption of heat-setting the twisted yarn. The apparatus and methods are useful in the accelerated production of yarns suitable for soft floor coverings.
Abstract:
A method for rethreading a yarn during false twist texturing of the yarn includes setting the temperature of a heater body outside a range having upper and lower limits so that if melted yarn adheres to the heater, the yarn vaporizes quickly if the temperature is above the upper limit or is easily removed by rethreading the yarn if the temperature is below the lower limit. The heater body has a total length between 0.8 and 1.2 m, the heater body and heating member divided into two pieces from upstream side to downstream side of the heat treating apparatus in ratio of length between 1:3 and 1: 1:5. The divided upstream heating member (12) is able to heat the upstream heater body (11) at a temperature higher than 370.degree. C., and the downstream heating member (22) is to heat the downstream heater body (21) at a temperature of between 200.degree. and 320.degree. C. or higher than 370.degree. C. The upstream heater body has yarn guides (15) disposed at a longitudinal pitch of at most 30 mm, and the downstream heater body has yarn guides ( 24) disposed at a longitudinal pitch between 80 and 120 mm.
Abstract:
Apparatus for insulating air-conditioning and soundproofing a work area of a textile machine includes a tubular cover arranged around the work area fitted with hatches for inspecting this area, an air-conditioning unit; which takes atmospheric air from the working environment of the machine and, after having conditioned it in a desired manner, feeds it inside the aforementioned tubular cover, and a manifold device for discharging "exhausted" conditioned air, coming from the inside of the tubular cover towards the outside of the working environment of the textile machine itself.
Abstract:
Machine for carrying out twisting and an additional texturing treatment continuously on a man-made yarn, wherein false-twist texturing treatment elements (6) are arranged in the central part (2) of the stand of the machine, and the feeding elements (7, 10) for feeding the yarn consist of delivery devices of the positive type. A double-twist spindle (3) and the winding assembly (5) are arranged one above the other and are laterally offset. The guidance of the yarn (5) at the exit of the double-twist spindle (3), in order to convey it into the texturing treatment zone (6), and at the exit of said texturing zone, in order to convey it to the winding members (11), is obtained by an assembly (13) comprising, for each work station, a pair of yarn guides (15, 16) supported at the same level on the stand of the machine substantially at mid-height. One guide (15) is arranged in the extension of the double-twist spindle (3), and the other guide (16) is offset laterally outwardly from the one guide (15).
Abstract:
A device for heat treatment, in particular for steaming of spools, cops and cones, based on an elongated, height-adjustable steaming vessel (2), arranged below, and parallel to, spools (15) suspended in a row. By being moved into the steaming vessel (2), the spools (15) can be unlatched and, after closing of a lid (7), heat treated.Alternatively, a closed, conduit-like steaming vessel can be included in the material flow of the spools, permitting steaming in the throughfeed mode.The dwell times of the cops after steaming are largely predeterminable. Also, the space requirements of the equipment are minimal.
Abstract:
The jacket enclosing a motor driven textile spindle of the type wherein the spindle is driven by a separate motor which is mounted on a common base with the spindle is modified to include air inlet and air exit openings. The motor is located in proximity to the spindle and is coupled to it by a toothed belt or the like. As the spindle is rotated by the motor air is drawn in through the inlet opening of the spindle and exits through the exit openings in the form of a strong stream of air which blows on and cools the motor. In this manner the spindle doubles as a fan for the motor and the necessity of providing a separate fan for the motor is avoided, resulting in savings in space and energy for driving a fan.
Abstract:
A textured yarn suitable for weaving a fabric having an improved width shrinkage is provided by a simultaneous draw-texturing process of a partially oriented polyethylene terephthalate (PET) filament. During the draw-texturing process, the yarn delivered from a main heater is adjusted to maintain a yarn temperature not less than 80.degree. C. which corresponds to a glass transition temperature of PET prior to being introduced into a false twister, whereby both the crimpability and sonic velocity of the resulting yarn are improved. A fabric woven therefrom has a good bulkiness as well as a good resiliency. Further, according to the same principal, a textured yarn having crimp unevenness suitable for producing a fabric having a surface contour is provided by varying the yarn temperature prior to being introduced into the false twister in a range between 80.degree. C. and 160.degree. C. The latter yarn has no tight spots therein and results in a natural looking fabric.
Abstract:
A ringless spinning frame comprises a spinning frame body, above which a plurality of sliver cans are disposed on a platform, and a plurality of spinning units attached to the spinning frame body. A sliver from each sliver can is guided by a sliver guide conduit, which is disposed between the corresponding sliver can and spinning unit, to the corresponding spinning unit. The sliver guide conduits extend downwardly behind the corresponding spinning units and within the spinning frame body the interior of which reaches a temperature higher than that of the exterior by about 10.degree. to 20.degree. Celsius. To prevent the sliver guide conduits within the spinning frame body from being raised in temperature, the ringless spinning frame is provided with a device disposed near the sliver guide conduits for preventing heat produced in the spinning frame body from being transmitted to the sliver guide conduits.
Abstract:
Process and apparatus by means of which synthetic fiber tow, sliver or yarn is heated in a relaxed state or under tension. The material, while passing through a horizontally elongated oven provided with a series of infrared ray heaters on both the top and bottom walls, is irradiated by far infrared rays having a peak wave length of 3.5 to 7.0 .mu., while an air curtain is formed between the material and each series of infrared ray heaters; the atmosphere surrounding the material in the oven is kept at 80.degree. to 280.degree.C. Rapid treatment is possible without any adverse effects on the material.