DE2231716A1 - ELASTIC FIBER YARN - Google Patents

Description

Patent attorneys Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr. K. Fincke CRK Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber

8 MUNICH 86, POST BOX 860 820

MÖHLSTRASSE 22, NUMBER 48 39 21/22

<983921/22>

L. Payen & Cie Societo anonyme, 9, rue Piζay, Lyon 1er Rhone, France eh

Elastic fiber yarn

The invention has the object of a yarn made of elastic lasers, the elasticity of which is blocked when the yarn as such "is considered, but after the processing of such a yarn into a woven or knitted fabric is releasable.

The yarn has the particularity of being composed of at least one fiber yarn, brought together and twisted (plied) with an elastomeric yarn which has been wound previously energized with a continuous thread, _#, and the elasticity thereof by a steam treatment at 50 to 9O ⁰ C is blocked «If you look at the thread constructed in this way, the fiber thread is on its surface and the elastomer thread is inside it.

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The fiber yarn or yarns used in this yarn construction come, can be of any nature and any composition, but especially made of wool or cotton. What the As regards elastomeric thread, it can also be of various origins; an elastomeric one is particularly suitable Thread viewed, the brand "LYGRA", which is braided by a textured polyamide thread, which is based on the false twist process is textured. ^

For a better understanding of the invention, it is described below with reference to a yarn, its structure and its two-stage manufacturing process only as an example and without limiting the invention, listed below are:

First stage of the procedure

According to the known method for producing core yarns, an elastomeric thread is twisted around by a continuous thread.

In the example chosen, the elastomeric thread is a 44 dtex trademark "LYCRA" thread; one twists this with a twist of about 1000 turns with a polyamide thread of 22 dtex, which was previously made by means of the FJklschdrallververfahren has been textured. During the twisting, the elastomeric thread is under tension; it will be about 3.5 times a stretched to a length.

The Umspinnungsgarn obtained is steamed in an autoclave, wherein it always remains under tension and at a temperature between 50 and 9O ⁰ C. In this way, blocking the elasticity of the Umspinnungsgarnes.

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Second stage of the procedure

The spun yarn obtained in the first process stage is brought together with one or more fiber yarns; the twisting takes place with a twist that depends on the titer of the or depends on the fiber yarns, but the direction of rotation of which is opposite to the direction of twisting of the twisted fibers of these fiber yarns,

In the example described, the twisted elastomer thread is used of blocked elasticity, as obtained in the first process stage, with two wool fiber yarns of 125 dtex twisted together with a twist between 600 and 800 turns of S-wire.

The twisted yarn thus obtained is subjected again to a steaming process of the coil and fixed at a temperature which advantageously 5 ⁰ C is higher than that for fixing of the elastomeric yarn employed in the first stage of the process temperature. In the example chosen, the end of the process was fixed ^{at 70 ° C. in the second process stage.}

This yarn, the elasticity of which is completely suppressed, can be used under the same conditions as a yarn from non-elastic fibers and the textiles made from this yarn (fabrics with warp and Iuss or knitted goods) regain their elasticity after a stress-free heat treatment.

The above description indicates a very specific thread? Obviously, however, fiber yarns of much higher denier can be used as mentioned above. It was found that a yarn with suppressed elasticity can be produced by twisting a "LYORA" -Fadeη of 77 dtex under 3.5-fold drawing with a moss yarn made of polyamide of 44 dtex with 900 turns, S-wire 65 ⁰ C and then this twisted thread with two fiber yarns made of wool of 1000 dtex with 200 turns per m, Z-wire

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twisted together. The twist to combine these yarns is done with S-wire, 200 to 300 turns per m.

In all cases, the invention allows the production of a yarn from elastic fibers, the elasticity of which is temporary is suppressed to be released only after the processing of the yarn into a fabric or a knitted fabric. The particular advantages of this yarn can be summarized as follows: It preserves the look and feel of the yarn Fiber yarns used in its production, since its elasticity is suppressed, it can be used without special devices Process into any textile product, elongation, breaking strength and abrasion resistance are particularly good, the in The elastic thread in its structure is completely protected by the textile products made from this thread show perfect dimensional accuracy.

As for the manufacturing process of this yarn, ao is this is extremely simple and does not require any special equipment to be carried out.

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Claims (4)

Claims 1. Yarn made of elastic fibers, characterized in that it consists of at least one paser yarn ", united and twisted with an elastomeric thread that has previously been twisted under tension from a continuous thread and the elasticity of which has been suppressed by steam treatment. 2. Yarn made of elastic fibers according to claim 1, characterized in that that the elastomeric pad as a core thread is an "IYCRA" pad, that of a superpolyamide thread is twisted, which is preferably textured, and that the fibers located on the yarn surface Wool fibers are. 3. A method for producing a yarn from elastic fibers according to claims 1 and 2, characterized in that that it comprises two stages of the process, namely the one Preparation of the elastic core thread and the union of this padding with the pad or pads with the textured fibers " 4. A method for producing a yarn from elastic pasers according to claim 3, characterized in that the elastiwohe Paden is twisted under tension, with a twist of about 1000 per m through a polyamide thread which has previously been textured by a Palschdrallverfahren and that so TJmspinnungsgarn obtained is steamed in the autoclave in the tensioned state at a temperature between 50 and 9O ⁰ C. 209886/0765 Method for producing a yarn from elastic fibers according to Claims 3 and 4, characterized in that that the wrapped elastomeric thread of suppressed elasticity is combined with one or more fiber yarns with a twist whose direction of rotation is the opposite of that of the spinning twist of the fiber yarn or yarns and that ultimately obtained composite yarn is fixed at a temperature slightly higher than that used for Fixing the elastic core thread was used. 209886/0768