DE1811718A1 - Process for the production of dyed curled yarn - Google Patents

Description

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PAINT FACTORY ^{BAYERAG 1811718}

LEVERKUSEN-Bayerwerk2g, NOV. Patent department Reu / Lo

Process for making dyed crimped yarns

The subject of the invention is a process for the production of dyed crimped yarns from fully synthetic continuous threads, in which the threads are dyed after being spun from the ak shaft and then further processed into crimped yarn.

When texturing according to the false-wire method, there are There are currently two options for making colored crimps. The finished crimped yarn is either after the texturing in the skein or in a soft cheesy package (muff), or before the texturing on the Colored cross-wound bobbin. Polyamide and polyester threads are mainly colored after texturing. The coloring before texturing leads to a deterioration in these threads Yarn failure, as the crystallinity of the material is increased by the heat treatment during dyeing and the thread is shrunk. Polyacrylonitrile threads on the other hand, in practice they are colored before texturing.

The coloring after texturing is currently used for polyamide and Pol./esterfäden is with a number of work aisles

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tied together. Highly elastic crimped threads are dyed for highly elastic ones Article in the strand, so as not to impair the high elasticity due to the coloring, for moderately elastic Article in the cylindrical soft winding, whereby the decrease in the elasticity of the Yarn is beneficial for use in this sector. Moderately elastic crimping thread, made on the FD machine, up to now can only be dyed perfectly in special packaging, since the dyed in the soft winding easily creates differences in volume between the inner and outer layers of the coil.

The operations for the production of crimped and dyed highly elastic polyamide and polyester threads for the The following are used in highly elastic articles: 1) spinning on cylindrical cheeses, 2) stretching on bobbins or cylindrical cheeses, 3) texturing a highly elastic crimped thread onto cylindrical cheeses, 4) twisting them together of threads with a tendency to crimp S and Z,

5) Production of the strand (max. Strand weight approx. 400 g),

6) steaming, 7) multi-thread dyeing, Θ) winding, 9) ready-to-open to Konps.

The twisting is absolutely necessary before the strand is made up, as it is outwardly echwiprig to be 1-ply in the strand.

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Dyed yarn to be worked off because the material is underneath each other hooked and prepares process difficulties.

For use in the outerwear sector moderately elastic crimping threads required. Here are the The following operations: 1) Spinning on cyl. Packages

2) stretching on cops or cyl. Cheeses 3) text.

a highly elastic Krauselfandens on cyl. Soft winding

(max. spool weight approx. 600 g) 4) steaming 5) single thread j |

Dyeing with a simultaneous reduction in elasticity

6) unwind by rolling

These threads are ply and twisted Coloring not necessary. If multi-threaded material is required for use, e.g. in the cotton sector, then this is made by plying and twisting after dyeing. The rolling trigger leads to an increased number of thread breaks.

Moderately elastic crimped threads can also be used on special FD machines can be produced with post-heat treatment. The following operations are necessary for coloring: 1) spinning, 2) stretching, 3) texturing, 4) production of a special dye spool, 5) steaming, 6) single-thread dyeing (max. Package weight approx. 800 g), 7) bobbins or for multi-thread processing Twisting and opening.

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Here, too, the processing of the special dye packages is included 1-thread dyeing with increased thread breaks and thus associated with difficulties. It is therefore also common at multi-thread processing to carry out the twisting process before the manufacture of the special dye package and multi-thread twisted to dye.

In all of the processes described, mixed processing of dyed and undyed yarns is not possible, since the material is shrunk after the dyeing process, while the undyed material has a residual shrinkage of 4 to 6 io , depending on the manufacturing conditions.

In the case of dyeing before texturing, which is customary exclusively with polyacrylonitrile threads, the following are currently the following Work steps necessary: 1) spinning on cylindrical cross-wound bobbins, 2) stretching, 3) shrinking the material, 4) bobbins on dye bobbins (max. bobbin weight about 1 kg), 5) single thread Dyeing, 6) texturing on cylindrical cross columns, as well as twisting and opening for multi-thread processing.

Here, too, mixed processing of colored and non-colored material is only possible, even if the non-colored material is also possible Material was shrunk before texturing.

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A process has now been found for the production of dyed crimped threads by the false twist method, in which ~ essential operations can be saved if the filaments emerging from the spinning station become one Open the knitted tube, dye it in the tube and then stretch and pucker in one operation. Also is mixed processing of colored and non-colored material is possible because the residual shrinkage after texturing is the same for both yarns. For this purpose, the £ jQ.nngut is opened up in the form of a tube and colored. On the Texturing machine, this spun material can be drawn and crimped in one operation. The one used to manufacture The knitting machine necessary for the hose is located directly under the spinning shaft. The mesh deformation by the presentation of the tube is eliminated by the stretching process. The coloring can be done in the pack as well as in the clip-on system be carried out in a known manner. This method is suitable for polyamide, polyester and polyacrylonitrile threads.

It can be seen from the following examples that this new process has significant advantages. By saving the work steps as well as the possibility of mixed processing, especially when using the stretch crimping

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principle3 of the known type a significant profitability to be exposed.

example 1

For use in the knitting sector for Wevenit goods, a polyamide crimped yarn HOden of moderate elasticity is required. A spinning denier of 427den is obtained, spun and on a knitting machine 1OTIg. straight to one
Opened a tube of 2 kg. This hose reel is colored in Aufsteckverfahren and a texturing with 2 Texturierzonen at a Verstreckungsverhaltnis of 1: stretched 160 ⁰ C at 1800 Drehg./m 3 »2, and at 150 ⁰ 4 G # overfeed and 2000 T / m.falschdrahtgekräuselt.

Example 2

For use in the cotton sector, a moderately elastic Käuseigarn made of polyamide-6 90 den 4-ply is required. A titer of 315 denier is spun and opened directly in tubular form on a knitting machine. After dyeing, the material is in a texturing machine with 2 Textruierzonen at 1600 rotations 150 ⁰ C in the ratio 1; stretched and then 3.12 T / m with 9 $ overfeed curled at 16O ⁰ C 3000th This material is twisted and knotted together in 4 ply.

Example 3
For use in the sector of highly elastic socks

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yarn a crimped yarn made of polyamide, 90 denier is required. A spin titer 315 den is spun and opened up directly in the form of a tube. This material is colored. After the stretching process in a ratio of 1: 3 * 4 on a conventional stretching machine, the yarn is twisted incorrectly at 3000 T / m at 180 ^° C. and a delay of 6 $.

Example 4

A polyacrylonitrile crimped yarn 240 den is required for the outerwear sector. A spinning titre of 860 den is used. This material is made on a 10 TIg knitting machine. opened up into a tube and then colored. After dyeing, the tubing is submitted directly to a texturing machine with drafting equipment, in a stretch ratio 1: 5.5 stretched at 16 (5 ⁰ C and at an overfeed of 3 $> at 170 ⁰ C 1560 T / m wrong wire treated.

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Claims (2)

Pat does not respond 1. Process for the production of colored crimped threads from fully synthetic continuous filaments according to the false twist method, characterized in that one from the spinning station emerging EndIoθfäden into a knitted tube opens, dyed in the tube and then stretched and puckered. 2. The method according to claim 1, characterized in that a knitting machine is arranged directly at the spinning station is. Le A 11 892 -β- 009824/1872