DD240032A1 - METHOD FOR PRODUCING FARLY OR COMPLETELY ORIENTED FAEDS - Google Patents

Abstract

The produced by the process Faeden can be used in the stretch texturing but also in the warp / knitting as a smooth continuous filament. The aim and the object of the invention is to modify a process such that the process sequence can be changed quickly and easily to the spinning parameters of the various titer ranges. The process for the continuous production of polyamides, polyesters or polyolefins at winding speeds 2 000 mmin 1 is carried out so that the freshly spun Faeden after the known cooling in the falling and blowing shaft by friction with air in a Faecherungsstrecke to a residual strain 100% deformed, whereupon they are treated 210 4 to 210 2 seconds with steam or moist hot air in a thread closing device and subsequently wound up, wherein the Preeparierung the Faeden takes place before and / or after the steam treatment.

Description

Surprisingly, it has been found that with the additional application of the swirling of the threads with steam or moist hot air, a perfect rewindable silk is obtained, which can be wound up in a substantially wider working range compared to the previously known methods.

A further surprising aspect is that the arrangement of the preparation before and / or after the swirling of the threads by means of steam or moist hot air, the degree of orientation in the process sequence according to the invention are changed according to the goal

It is also surprising that the Verläuferf for producing largely or fully oriented threads has a high variability, although no godets are used, so that the complex godet control can be omitted.

embodiment

The method will be explained in more detail below by way of example: Polyamide 6 threads of titer 4.4 tex 9 are produced on a spinning machine known per se with extruder, spinning beam, nozzles, blowing and chute. The threads are passed through a fan-out section of 3.50 m, where they receive a residual expansion of 70% by friction on the surrounding air. The threads are after they have passed a fan point supplied to a thread closing device, which is operated with steam. The exposure time of the steam to the thread is 0.003 seconds. Subsequent to the thread closing device Kondenzabscheider are arranged.

Subsequently, the preparation of the thread by means of known preparation fingers. The thread can then be wound directly thereafter at 4000 m.sup.- ¹ .sup.1 The threads can be wound up reliably to form a stable coil winding.

The elongation at break of the threads is 50% and can be used without further treatment as a smooth thread and without further stretching in textlien further processing.

Claims (1)

Invention claim: Process for the preparation of substantially or completely oriented filaments of the melt synthetic linear Hochpolymerer, preferably polyamides, polyesters or polyolefins, in a continuous process at winding speeds> 2,000 m · min ~ ¹ , characterized in that the freshly spun filaments after the se known cooling in the falling and blowing shaft by friction with air in a fan-out section to a residual strain <100% are deformed, whereupon they are treated 2 × 10 ~ ⁴ to 2 10 " ² seconds with steam or moist hot air in a thread closing device and subsequently wound up , wherein the preparation of the threads takes place before and / or after the steam treatment. Field of application of the invention The invention relates to a process for the continuous production of polyamide, polyester or polyolefin filaments at winding speeds> 2,000 m.min ^-1 . The yarns which have been produced by the process according to the invention can be used in stretch texturing but also in warp / knitwear be used as a smooth continuous filament without reinsurance. Characteristic of the known technical solutions , There are a number of methods are known, according to which in a continuous process largely or completely oriented threads are obtained (DD-PS 118 129, DD-PS 116 858). In the so-called spin-stretch wind method, the threads are pre-oriented in the spinning shaft. Stretching is usually done between godets working at defined speeds. For fixation, d. H. to achieve a stable coil structure, the godets are heated. To heat the godets a considerable mechanical engineering effort is necessary. In addition, the number of threads per job is limited. After the so-called high-speed spinning process threads are usually obtained, which can be used only to a limited extent as smooth continuous filaments. If the orientation is too high, deformed coils are very easily formed, which can be processed poorly. Also in the quick spinning process godets are used to make the process more variable. Without godets, the high-speed spinning process requires a high degree of consistency with the starting polymer, since otherwise the wind-up limits are exceeded and thus a stable package construction can not be guaranteed. A rapid change of the Titersortimentes is thus limited to a machine in the known high speed spinning possible. According to another known method (CH-PS 623 611) is proposed to produce highly oriented threads in one operation. Here, the threads are first extensively oriented by drawing off a godet roll at about 4000 m.sup.-1, subsequently redrawn between godets and subsequently simultaneously fixed and swirled with steam at about 5000 m.sup.2 before being wound up.The advantage of this method lies in the Furthermore, a higher number of swirled points per thread length is produced, but the disadvantage of this process is the extremely high working speed, the high mechanical complexity per workstation, the number of threads per workstation being limited. Object of the invention The aim of the invention is to provide in a simple way without high mechanical engineering effort, making full use of the capability of a method in which either largely or completely oriented threads can be obtained in one operation, the winding in a wide speed range is possible. - Explanation of the essence of the invention The object of the invention is to modify a process for the production of extensively or completely oriented yarns so that the process flow is easy to control and can be quickly adapted to the spinning parameters of the various titer ranges. According to the invention, the object is achieved by carrying out a process for producing substantially or completely oriented filaments from the melt of synthetic linear Hochpolymerer, preferably polyamides, polyesters or polyolefins in a continuous process at Aufwindegeschwindigkeiten> 2000 m · min "'so that the freshly spun threads after the known cooling in the fall and blowing shaft by friction with air in a fan-out section to a residual strain <100% deformed, whereupon 2 x 10 ~ * to 2 10 ~ ² seconds with steam or moist hot air in treated and subsequently wound up, whereby the preparation of the threads takes place before and / or after the steam treatment.