DE1635008A1 - Method and device for treating yarn - Google Patents

Description

PATENT LAWYERS '

DR. ING. A. VAN DER WERTH DR. FRANZ LEDERER

21 HAMBURG-HARBURG β MUNICH 8

W1LSTORFER STR. 32 - TEL. (0 * 11) 7708 61 'LUCILE-GRAHN-STR. 22 -TEL. 108111 440846

Munich, August 2, 1967 L / vB

Applicant: THE KLINGER MANUFACTURING COMPANY LIMITED,

Silver Street, Edmonton, London, N.18, England

Method and device for treating yarn

The present invention "relates to the treatment of Yarn and in particular the treatment of a thermoplastic yarn or yarn in the form of a continuous thread of a yarn with a thermoplastic component.

It is "known yarn for use in the textile field." produced by extruding the yarn in the form of continuous filaments, drawing the yarn to the Orientation of the thread molecules and to improve the tensile strength of the threads, dyeing and texturing of the yarn, e.g. by means of a stuffing box or by false twist puckering.

In yarn dyeing, the yarn is treated with the dye liquor, and excess dye liquor is then removed from the yarn and the dye is then bound and fixed to the yarn.

109 * 33/0370 ~ ² ~

DEUTSCHE BANK AC. HARIURC 66 / II5S2 POSTSCHECKrHAMBURC 117330

The setting of the dye is achieved by increasing the temperature of the yarn and the dye on the yarn and held at the elevated temperature for a predetermined one Time causes. The dyed yarn is then washed and dried.

The speed and effectiveness of a "method for Production of dyed yarn is at least partially limited by the capacity of the yarn for the Dye and the absorption speed and by the strength of the dye liquor used.

An object of the present invention is to provide a method and to provide an apparatus for treating yarn in the manufacture of dyed yarn.

According to the method according to the invention for the treatment of Yarn, the dye is applied to the undrawn yarn and the dyed yarn is then first stretched.

The term "non-stretched yarn" as used herein Description is used, denotes yarn, as it is normally produced by the usual yarn extruder. In some cases, so-called "undrawn yarn" may actually have been slightly drawn after its extrusion before it is fed to another apparatus for stretching and texturing. Although such yarns are slightly drawn out

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However, if the yarn thread molecules have a low degree of orientation, such yarn is generally still referred to as "non-drawn yarn". Before such a non-drawn yarn, for example, can be fed to a texturing and later processed into finished garments, it is necessary to stretch the yarn and its length by at least eg _c to stretch twice. In the present case, the term "non-stretched yarn" also includes yarn whose molecules have a low degree of orientation.

3s it is assumed that after drawing yarn a "core surface effect" which causes the outer surface of the yarn to adhere the dye to the Resists yarn and impregnation of the yarn with dye. In contrast, it was found that non-stretched Yarn as a result of what is believed to be a relatively open physical structure, more easily "picks up" dye, so that unstretched yarn can be dyed faster or by using a less concentrated dye liquor can be dyed as stretched yarn, but the same dyeing effect is achieved.

It has also been found that if undrawn yarn is dyed and then drawn off, then the The dye is bound more tightly to the thread. It is assumed that this is due to a deeper in-

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penetration of the dye into the yarn, which is then the "core surface effect" created by the stretching tends to retain the dye in the yarn. In this case the "core surface effect" prevents migration of the dye from the inside out through the yarn surface, e.g. during the washing of the fabric, which is out of the yarn has been made.

The invention is particularly, if not exclusively, applicable to space dyeing of £ rarn.

A well-known space dyeing process is used to stretch Yarn first dipped in a dye liquor to create a background color on the yarn, and then a differently colored dye is pressed onto the yarn in certain distances along the length of the yarn to get a pattern of the other color on the color background. Excess Dye solvent is then removed from the yarn, the dye is set, and the dyed yarn is washed and dried.

The speed of the yarn in such a space dyeing machine uring is determined by the speed at which the drawn yarn can absorb the dye and by the Concentration of the dyes used.

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Another object of the present invention is to provide an improved space dyeing process.

The invention therefore also relates to yarn treatment processes in which the dye is in a space dyeing Process applied to undrawn yarn, excess dye solvent removed, the dye set and the yarn is washed and dried and then stretched to produce a dyed, stretched yarn «,

According to another embodiment of the invention Procedure for treatment before; Yarn is applied dye to undrawn yarn in a space dyeing process, Excess dye solution removed, the dye set and the yarn drawn to produce a dyed drawn yarn which is then washed and dried will.

According to one embodiment of the invention, yarn continuously treated by passing it through a dye bath to give the yarn a background color, thereafter at least one other color is pressed onto the yarn at intervals along its length to make a To create patterns on the yarn, excess dye solvent is removed, the dye is set, the yarn Washed, dried and then stretched to produce dyed, stretched yarn.

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The invention also includes an apparatus for dyeing using the space dyeing process of non-stretched yarn ind subsequent stretching of the yarn with means for Application of the dye to undrawn yarn, means for removing excess marble agent, Means for setting the dye, gowns for washing the yarn, means for drying the yarn and means for Stretching the yarn.

According to one embodiment of the invention, the apparatus for treating yarn in a continuous space dyeing process at least one dye bath with a Dye liquor, means for feeding and dipping undrawn yarn into the dye liquor, one or more ink imprinting means to press more dye onto the yarn at intervals along its length, a first heated one Chamber for removing excess dye solvent from the yarn after application of the dyes, a second heated chamber for setting the dyes on the yarn, a third heated chamber for drying the yarn after it has been washed and draw rollers for stretching the dyed, non-drawn yarn for the manufacture of dyed drawn yarn.

While so far the space dyeing process has not been applied to unstretched Yarn has been applied prior to drawing, there are many advantages of such dyeing of the invention

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Yarn in the unstretched state found in the same Dye concentration can be dyed to the same extent compared to drawn yarn more 'undrawn yarn will. The speed at which the yarn can be treated is also increased over speed when dyeing drawn yarn, so that the throughput speed of the yarn can be increased. On the other hand, the speed can also be kept the same as before, and instead a weaker dye concentration can be used for the same coloring effect, so that in the Removal of excess dye solvent before the yarn sets, since less dye is wasted the applied dye concentration is lower.

3eir. Stretching the yarn after its dyeing becomes the original Color samples are stretched on the yarn and the stretching of the original pattern makes it an aesthetic one attractive new pattern generated.

In space dyeing it sometimes happens that the original color pattern printed on the thread is spotty and the Dye is unevenly distributed, so that sharp changes in color can be seen on the yarn. It was found that such staining on dyeing of undrawn yarn is less likely to occur due to the more porous nature of the non-drawn yarn. The larb-

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brisk penetrates the undrawn yarn more evenly and disperses and spreads more evenly in it. As already mentioned, the subsequent stretching creates an aesthetically favorable effect on each pail and removes any blotchiness and sharp changes in color tone. When, in contrast to this, stretched yarn is dyed using the space dyeing process, mottling and sharp changes in color tone remain on the finished dyed yarn »

Sin process and device for space dyeing of undrawn yarn according to the present invention For example, explained with reference to the accompanying drawing.

According to the drawing, a reciprocal number unstretched yarns 10 is introduced (for example, to 400) in parallel in a dye bath 11 (having a temperature of about 20-40 ⁰ C), the threads wc z.3o be immersed in a green dye liquor by a rfalze 12th The yarn threads then pass into another dye bath, where they pass between rollers 13 and 14 which exert pressure at intervals. The ^T .. ^r Alze 14 immersed with its lower end in a dye bath 15 (having a temperature of about 20-40 ⁰ C), which is filled with a blue dye liquor for example, so that upon rotation of the upper surface of the V. 'Alze 14 carries a film of the blue dye liquor. The Yfalze 13 has four projections which are distributed around its circumference, so that when this roller is rotated, the projections grip the yarn and press it down onto the roller 14 »

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so that the yarn threads the blue dye at certain intervals record along their length. This way, a blue color swatch will appear on a green background Running of the yarn between the rollers 13 and 14 is generated.

Thereafter, the yarn is dried in a drying chamber 16 by an infrared heating source (arranged to give the yarn a temperature of about 93 ° C) to remove excess dye solvent from the yarn. The yarn is then passed through a Abbindekammer 17 (which has a temperature of about 93 - comprising 121 ⁰ C) passed, in which the yarn is heated by an infrared heating source, or by dry steam to the dye ligate and bind to the yarn to.

Haoh setting, the yarns 18 ge wash in a water bath having a wash liquor with e INEM suitable surfactant or Let | e contains (at a tem perature of about 99 ° O). The yarns are then dried in a dryer 19 ', passed over a guide roller 20 and brought onto a drawing roller 21, where the yarns are drawn in a known manner. The yarns are then wound on a winding 22.

It has already been mentioned above as an advantage of the inventive dyeing of undrawn yarn by the space dyeing process that the undrawn yarn causes the dye solution to buckle

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picks up as stretched yarn. It has been found that the yarn speed through the dyeing step can be increased by two to animal times over previous dyeing processes of drawn yarn, where speeds of 1-15 m / min were used. In the process according to the invention, the yarns are drawn out to two to six times their length in the unstretched state after dyeing, so that the total speed at which drawn, dyed yarn is produced according to the process according to the invention is about 4 to 24 times as great as before is. Thanks to these increased speeds, it is now possible to introduce the dyed yarn, which has been produced according to the invention, directly into a modern, high-speed texturing machine. Bisläng was the rate at which colored yarn after space-dyeing process could be generated too small that the colored yarn exturierungamaschine directly in a modern fast-running T. would economically can be guided.

Of course, the process described can be supplemented by additional treatment steps, e.g. with conventional additives to improve the finished dyed yarn, e.g. color fixators, lubricants, optical brighteners, antioxidants, matting agents, antistatic agents, antistatic agents and agents for absorbing other dyes. It has been found that such supply sätae to the yarn erfindungsgtmäß advantageous prior to stretching

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o.uf can be eebracht, as a result of the "open" structure of the yarn, the advantages that have been described above with respect to ink receptivity and color penetration ', werdeiic also achieved in this case, the additives are added ^aur: ihlt according to the requirements that result from the use of the dyed drawn yarn.

Of course, other color samples can also be produced instead of the blue color sample described by way of example on green si background by removing the undrawn yarn is directed over a number of inking rollers. Here, the yarns are passed through a dye bath before they are passed be sent over the numerous color orphans, the patterns also know on an.ΐere '.'. 'iron are applied as they are known in space dyeing, e.g. from a printing press, which is arranged so that it periodically engages the yarn and prints a dye solution on the surface of the yarn, creating a cough on the yarn. Furthermore, the patterns along the yarn can be changed by Printing with uneven spacing or asymmetrical Arrangement of the projections around the roller circumference on the ^ alze 13 »

V. ^r ie was already mentioned above, the speed with which the dyeing of the yarns can be carried out is increased by the present invention, so that ea by the Br-

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Finding it becomes possible to produce a colored yarn at speeds comparable to the yarn insertion speeds in modern, high-speed texturing machines. At higher dyeing speeds it is convenient to dye the undrawn yarn as soon as it is out comes to the extruder. In one such "process, extruded yarn is directly put into the space dyeing process according to FIG introduced the present invention. In combination with high speed yarn extruders, the present invention enable a new continuous process in which the yarn is extruded, dyed immediately afterwards, then drawn and then textured »

If yarn is dyed after texturing, it can sometimes it happens that the structure of the Yarn is adversely affected. One advantage of the present method is that it eliminates such difficulties be avoided.

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Claims (8)

Claims 1. A method for treating yarn, characterized in that dye is applied to the undrawn yarn in a space dyeing process, excess dye solvent is removed, the color is set, the yarn is washed, and then dried and finally that Yarn is stretched to produce dyed, stretched yarn. ^v 2. The method according to claim 1, characterized in that undrawn yarn continuously duroh at least one Dye bath is passed to dye the yarn over its entire length with a background color. 3 * Method according to one of claims 1 or 2, characterized characterized in that the unstretched yarn continuously through at least one set of intermittently pressing inking rollers is directed around the yarn at intervals along its length to color. 4. Method according to one of the preceding claims, characterized in that the yarn is stretched before washing. 5 »Method according to one of the preceding claims, characterized characterized in that additives are applied to the yarn before the yarn is drawn to improve the finished product dyed yarns 109833/0370 6. The method according to one of the preceding claims, the
characterized in that / undrawn yarn continuously is supplied from a yarn extruder. 7. The method according to any one of the preceding claims, characterized in that the dyed, drawn yarn is continuously fed into a texturing machine. 8. Device for performing the method according to one of claims 1-7, characterized by the combination a known space-dyeing device and a known yarn stretching device, wherein the The drawing device is arranged to receive the dyed, undrawn yarn from the drawing device and the dyed, undrawn yarn draws for the continuous manufacture of dyed, drawn yarn. 109833/0370