DE4223853A1 - Sewing thread, process for the production of tear-resistant chain stitch seams and chain stitch seam - Google Patents

Abstract

The invention concerns a sewing thread which is particularly suitable for producing chain stitches, preferably for sewing on buttons. The sewing thread proposed is characterized in that it has on its outer surface at least one precursor material for a product which gives, to a stitch produced with such a thread, increased adherence to the material being sewn or increased adherence between individual loops in the stitch, so that chain stitches produced with sewing thread of this kind are virtually impossible to tear open. The sewing thread proposed is particularly suitable for sewing buttons on to textile fabrics. Low-molecular oligomers, for instance, may be used as precursor materials for treatment of the sewing thread, polymerization of these oligomers being completed to give full polymerization.

Description

The invention relates to a sewing thread according to the generic term fen of claims 1 and 2, a method for producing according to at least largely tear-resistant chain stitch seams Claim 16 and a chain stitch seam according to claim 23.

An essential quality feature of a textile seam stands in the way of anchoring the material of the Sewing thread in the material to be connected by the seam Fabrics. Such anchoring takes place in the case of quilting seams on every stitch, the one on a spool Small capacity provided Unterfa which anchored the upper thread. With chain stitching, le only with one or more cones of large size working threads that are not in everyone Stitch are anchored. Anchoring the thread of the ket The stitch is only sewn at the ends the seam. If there is damage to the seam between the If ends occur, a pull on the thread will cause the thread to open the entire seam. For this reason, the use of Chain stitch seams are very limited in practice or after in part, if a rising due to damage is inevitable Purchase is taken.

The industrial sewing of buttons is despite the above Disadvantages ge only use of chain stitch seams because this is the cheapest and fastest method for Fasten buttons represent the textile industry as well as the end consumer so far had to have the chain stitch seams fixing the buttons Damage occurred, often with the loss of the  under certain circumstances valuable button - for example in traditional costumes - ended.

On the other hand, those of higher quality require Quilting seams a lot of work because the quilting seam of Automation is not accessible. After the company The reserve for the lower thread on the bobbin must be applied manually Bobbin changes take place so that the sewing process may already be must be interrupted again and again after a few minutes, to enable the bobbin change. Such stitching can therefore, for example, for a button fixation Practicality and cost reasons are not used. If a chain stitch seam were applicable, without one Spool or cone change over a whole working day be worked away or for a longer period without interruption, so that diverse automation measures are used that can.

It is therefore an object of the invention to create a sewing thread fen, which allows chain stitching, which essentially are tear-resistant and which ge for fixing buttons are suitable.

This problem is solved in relation to a sewing thread by the characterizing features of claim 1, in Reference to a method of producing chain stitch sewing th by the characterizing features of claim 16 and with regard to a chain stitch seam by the characteristic Features of claim 23.

The fact that the outer surface after sewing with egg increased liability or liability can be provided, the thread sticks to the stitch linkage thread loops with each other and on the sewing material in the bed realm of the stitch holes. This will be the thread on everyone Stitch linkage similar to that of the quilting thread  the bobbin thread is held. Therefore there is an im essential same security of the chainstitch seam against Raising or tearing open as in the case of a stitching. Consequently can the much cheaper manufacturing option Chain stitching can also be used in such cases which previously required a quilting seam in order to to prevent the seam. At the same time, the son advantages of chain stitch seams such as the increased elasticity compared to quilting seams. On the other hand, a sewing thread according to the invention can also be used for topstitching if this z. B. from opti reasons or reasons of comfort or the like are required.

The increased adhesive effect is usually the most advantageous most achieved by an adhesive effect. This allows achieve very high adhesive forces, which is a permanent bond the threads on the stitch links and in the stitch ensure holes.

In a sewing thread according to claim 2 is carried out by a Ver increase in actual volume a decrease in density, such that the same material occupies a larger space. As the apparent volume increases, the measure changes material its shape in the microscopic range such that this appears macroscopically as an increase in volume.

The size of the volume change is to be according to claim 3 Measure that the stitch hole of the thread created during sewing is filled by the expansion and side by side thread loops touch each other and thus on the stitch hole edges as well as stick together. For this rei Chen diameter increases between 1 and 200%, esp in particular between 1 and 30%, preferably between 30 and 150%, particularly preferably between 40 and 100%, and in particular preferably between 50 and 80%. With most Ma  materials will get the best results with Diameter Ver Increases between 50% and 80% achieved.

There is a number for the volume change to be brought about of measures available. For example, the outer layer of the thread by a foamable plastic according to claim 4 are formed, which after processing the thread in the seam due to the effects of temperature and / or catalyst is foamed in the usual way. The foaming ratio can be kept low, for example below 1: 2, so that a relatively solid surface of the expan dated thread results. Because the thread during processing is still not foamed, neither interfere with the foaming process nor the foamed consistency of the thread's processing tion during the sewing process.

For example, such foaming and / or expansion effect with bicarbonates, especially ammonium hydro gene carbonate. A special advantage is based on the fact that hydrogen carbonates are already in ge ring of elevated temperature in gaseous - and thus foam- or bubble-forming substances disintegrate.

A particularly good liability arises according to claim 5, if as a precursor material the precursor of an adhesive used.

It is especially in the area of larger thread diameters knows, a coating of the cords thus obtained by Po lytetrafluorethylene. Here the use of the Invention according to claim 6 in that the polyte trafluoroethylene with an expandable material ver mixes is applied, and the expandable material after processing by appropriate action, which causes an expansion, is expanded.  

After all, chemical state changes are conceivable Use surface coating to increase volume the. In this regard, Mole can be remembered to use coolers that are able to due to Conformational changes bring about volume changes. Such molecules can be selected from, for example the group of natural or synthetic heteropolyme ren, in particular peptides or proteins; natural or synthetic homopolymers, especially polysaccharides.

The surface can be used to increase the apparent volume are formed by textile fiber material, which at for example by spinning a soul where the soul according to claim 8 is made of tensile material. The outer threads can be selected from a material the one that has the well-known "memory" effect, that in the relaxed "final state" a significant deviation the fiber longitudinal axis from the straight line is present. So at for example crimped fibers used as outer fibers become. However, these become loose in a stretched form applied without tension and with play, and then by Activation of the "memory" effect after processing in transferred their curl shape or the like. This way he no actual volume change follows strictly Sense, however, an apparent change in volume, the macrosco pisch viewed similar to an actual volume change is. This can be used in particular if if the tightness requirements are not too high or especially increased thread friction in the tap hole shall be.

It is essential that the thread in the unexpanded state is processed, and then the volume increase takes place when the thread is processed in the seam. If necessary, this can also be activated before processing take place if this is delayed accordingly to the Expan  dation leads.

By the measures of claim 9 are practically all thread materials commonly used in the textile industry as ba sis sewing threads are available.

The measures of claims 10 and 11 have the advantage that a large number of precursor materials are available which physically and / or chemically in the respective products can be converted, the Products that have properties compared to their volume to enlarge the precursor materials or the sewing thread to give a good adhesive effect to the sewing material.

Beyond that, physical conversion can also consist of insoluble materials, for example Starch, in a soluble product, e.g. B. by heating convert, which then adheres to the desired properties Kung, sealability and / or swellability.

Due to the additional auxiliaries according to claim 12, it is on the one hand, a chemical activation treatment of the Precursor materials, such as a polymerization, i.e. a Bring about extension of the molecular chains. A derar term polymerization leads with the materia according to the invention As a rule - in addition to the adhesive effect - to volume ratio enlargements.

On the other hand, it is with the auxiliaries according to claim 11 possible, other properties, such as plastic smoothness, smoothness, residual water content, etc. adjust.

It is also particularly preferred that the adhesive after a maximum of a few days free surfaces of the thread deactivated. This will make him  is enough that when the sewing is used as intended th surface structure a stickiness in the surface Area of the seam does not occur, but corresponds there The surface has set properly, so that this no longer has an increased adhesive effect. Depending on the requirements manufacturing knowledge, however, it can be advantageous The time period for the deactivation should be set much shorter zen, for example only a few minutes or even seconds, to immediately impede the others Operations due to stickiness of the seam to the outside excluded. In any case, the adhesive or Kle holds effect in the areas where the surface of the thread on other thread surfaces or on surfaces of the sewn fabric so that the adhesive or adhesive effect unchanged or reinforced after setting is maintained.

An advantageous system is one according to claim 13. Here acrylamide is used as a precursor material, wel In addition, the cross-linkers methylene bisacrylamide and N, N, N ', N'-tetramethylethylenediamine and the plasticizer Contains glycerol as auxiliary substances.

A sewing thread provided with such a precursor material has the advantage that the acrylamide easily, for. B. with UV light and / or peroxides to polyacrylamide polymeri can be settled. After sewing, the thread in the Over a day or more of water. The glycerol however, retains a residual water content, so that the sewing thread after sewing, for example to a chain stitch seam, obtains a plastic consistency, which makes it relatively sticky rig and thus adheres well to the sewing material and tap hole.

A similar effect can be achieved if you use cold water Serum-insoluble starches, especially potato starches, as Forerunner material uses this after heat  the sewing process, for example by steam, in solution brings - if necessary before processing with bactericidal or fungicidal agents for protection against microbiological Decomposition - resulting in a polysaccharide film the sewing thread and in the vicinity of the stitch hole. Similar to a wallpaper paste, this film has its own stick to stick.

Textiles sewn with such a seam, can also with temperatures of about 40 ° C to 60 ° C be without the starch precursor material out is solved because this is a starch insoluble in cold water summarizes that not yet in the specified temperature range is.

The composition of the precursor material according to claim 14 has the advantage that this is a commercially available Material is available from Wacker Chemie AG under the trade name "Vinnol Dispersion 50 / 25C" ver is driven, which then only the swelling or foaming ammonium bicarbonate must be added. With such a sewing thread, for example, buttons can be sewn onto textiles using chain stitching, whereby the chain stitch seam that arises, preferably after heat share Vinnol precursor is practically tear-proof.

It is particularly advantageous here ammonium hydrogen carbo add nat because of the gaseous decomposition products of the ammonium bicarbonate lying side by side with sticky surface provided thread loops within the Chain stitching is also given the option expand due to the foaming effect. So move at least partial areas of the thread loop surfaces towards each other, causing their sticky surfaces to be stir and glue together so that an additional Tear resistance is achieved.  

The measures of claim 14 are preferred because on the one hand a lot of natural substances can be used. On the other hand, sewing threads according to claim 14 lead to special smooth threads, which - with a good adhesive effect - especially easy to use in long-term operation.

The present invention also has the following white more advantages on:

This enables expansion of the sewing thread after processing a drastic increase in the friction of the thread in the Tap hole, and thus a self-holding effect at unterbro chenem thread course. This can mainly be used to Chainstitch seams ver to a much larger extent turn without running the risk of being incomplete Anchoring of the chain thread or breakage of the chain thread causes the entire seam to open. In the case of a sol chen thread break hold the neighboring stitch holes Thread tight and thus avoid that the thread is released and the Seam opens completely. As is known, chain stitch seams without Are created, the need for Feeding a bobbin that is of very limited length the coil is wound on and therefore too frequent sub breaks in the sewing process for the purpose of changing the bobbin leads. This self-locking or self-holding effect of the inventor he sewing thread according to a chain stitch seam thus opens the chains that are cheaper in terms of production technology stitching considerably wider application areas than so far.

So it is particularly possible to sew the sewing according to the invention for the industrial sewing of buttons according to claim 16 to use. Usually a button is machined a chain stitch with about 18 stitches on a garment piece fixed. Previously known chainstitch seams ever led  but often especially with buttons, which when used become one considerable mechanical stress on the chains holding them stitching leads to tears or breaks in the Chain stitch seam. However, such cracks or breaks result further use for the reasons mentioned at the beginning inevitably to the opening or tearing open of the chain stitch seam. However, this usually leads to the loss of the Button.

In contrast to this, the method according to the invention performs according to claim 16, however, due to the liability arising product for practical tear-resistant chain stitch seams.

In addition, it is a particular advantage of the invention procedure according to that buttons also with a defined Distance from the textile goods - about the buttons of a suit jacket - without additional measures such as wrapping the sewing threads between the textile surface and the underside of the button, can be sewn. This is because the sewing threads according to the invention after activation of the precursor ma terials are stiffer than ordinary threads and thus the Can hold button at a certain distance without him depends heavily on what would not be visually pleasing.

Another advantage is that thread material can be saved. This leads to the fact that although he sewing thread according to the invention is generally more expensive than a Fa the state of the art, due to the elimination of the order around the same cost per button seam with a conventional button seam.

The chain stitch seams according to claim 23 wi they are also more physical and / or chemical Stress such as mechanical stress when buttoning, thermal load when ironing, chemical load when ironing Washing with wash water, dry cleaning or the like without  to weaken significantly in their adhesive effect.

With the volume increased after sewing, for example swelling thread has a similar advantage Lich broader applicability or the avoidance of Achieve disadvantages of chain stitch seams, as with sewing thread with a surface with increased adhesion. Self ver what is common is the combined application of both measures, So an increase in surface area and an increase in Adhesive effect, especially adhesive effect, of particular importance part, because not only the holding effect of the thread of the chains stitching on the stitch links or in the stitch holes thereby further increased, but also the Gluing the sewing thread makes an additional contribution to one if desired, provides tightness. A tightness against water penetration can in particular under are supported that the adhesive thread is made hydrophobic. Conversely, both the sewing thread with the upper can surface of increased adhesion as well as the swellable sewing thread in a quilted seam if this is in the Individual cases should be desired or necessary. The Swellability also results in a stitching appropriate sealing, while the adhesive effect Ver anchorage of the topstitch is increased even further; This can about be of interest if one with such a seam provided structure can be divided into many small structures supposed to be held each by a short stretch of seam should be.

However, even when using a seam with bobbin thread gives itself an advantage by the fact that by the before the Verar processing reduced thread thickness a significantly larger thread length can be stored on the spool, and so the on number of business interruptions can be reduced. Nevertheless, the thread lies after processing, i.e. in Be use, in a desired higher thread thickness before the  to achieve a favorable pull-out behavior or from other reasons is desired.

The soul of the thread can be made of any suitable tensile strength exist material, which with the material of the expandable Surface layers is compatible. So as a material for the soul, for example, cotton, kevlar, carbon fibers or glass filament can be used. However, the soul needs basically not from one versus the surfaces layers of different material exist as long as It is established that the expansion effect on the surface strata is limited.

example 1

To produce an at least largely tear-resistant Chain stitching becomes a commercially available cotton sewing thread by an aqueous dispersion of a mixture of Polyvi nyl acetate, a cellulose derivative and a silicone resin led as precursor materials. Serves as polyvinyl acetate in the example, commercial Mowilit (Hoechst AG), as Cellulose derivative becomes commercially available in the example Methyl cellulose from Phrikolat-Chemical Products GmbH used. Serves as a silicone resin for the present case game commercial silicone resin MK from Wacker-Chemie AG.

The following quanti are used for the present example tative composition (based on the dry mixture):

50% by weight polyvinyl acetate,
45-48% by weight silicone resin,
2-5% by weight methyl cellulose.

After the sewing thread a dispersion dipping bath or with sponge soaked in the above dispersion he - after air drying - fed to the sewing device and  Buttons on a piece of textile, in the example a shirt, with sewn by means of a chain stitch.

The chain stitch seam thus created becomes one Activation treatment subjected to a commercial Hardener in aqueous solution, in the example an aluminum organic compound, under the name F100% of Wacker-Che mie commercially available, using a spray nozzle on the fresh seam is applied. By adding the hardener the precursor silicone resin changes onto the seam into a high polymer silicone resin which the chain stitch there is increased adhesion to the sewing material, the individual Loops of thread among each other and on the buttons.

This liability or adhesive creates a practical tear-resistant chain stitch seam, which is able buttons to be permanently attached to textiles without fear of anyone there must be a single tear within the thread to open go the chain stitch seam and thus leads to button loss.

Example 2

A commercially available sewing thread, for example a cotton thread is, as in Example 1, by an aqueous dispersion a copolymer of vinyl chloride and vinyl acetate and a plasticizer, in the example diphenyl phthalate, ge leads. Then you run the soaked Thread - after air drying - a sewing device, in the example fall to a commercially available industrial sewing machine.

The copolymer of vinyl chloride and vinyllace is used did in the form of an aqueous dispersion with cellulose as Sta bilizer as a precursor and in the example trap Vinnol dispersion 50 / 25C, which is from Wacker-Che mie AG is used. Who on the sewing machine which in turn buttons according to Example 1 sewn on shirts.  

Then the shirts are, as usual, using a Hot ironing device, in the example an iron, ironed.

Through this ironing process, which is required anyway simultaneously activated the Vinnol precursor material. By this time-saving type of activation treatment will Precursor material, in the example the copolymer Vinyl acetate and vinyl chloride converted into one product which has good adhesive properties without this an additional step would be required.

Example 3

A commercially available cotton sewing thread is used during processing processing to a chain stitch by an aqueous disperser sion of the following composition (based on the dry Mi led):

50.6% by weight polyvinyl acetate (Mowilit, Hoechst AG),
25.3% by weight of tree resin,
24.1 wt% starch.

After air drying, the result is a particularly smooth one thread that is easy to process even in continuous operation after heat activation an equally favorable adhesive effect has, where chain stitch seams arise, which in essentially no longer tear.

Of course, with the present invention, too A sewing thread according to the invention is produced on an industrial scale be, the raw thread with a solution from the in the Technique usual finishing with the addition of the invention Precursor materials and / or auxiliary materials is impregnated.

It is also possible here, such as microwave absorbers  for example graphite, carbon black or conductive metal oxides to the Avivage admit so that the conversion of the precursor mate rials to the product with the desired properties preferably be carried out by microwave absorption can.

Further advantages and features of the present invention he give another execution based on the description example and based on the drawing.

It shows

Figure 1 is a perspective schematic representation of a button which is attached to a textile piece at a defined distance by means of the sewing thread according to the invention. and

Fig. 2 is a perspective schematic representation of a button which is attached to a textile piece at a defined distance according to the prior art.

In Fig. 1, 1 denotes a button, which is sewn on a textile piece 2 by means of the sewing thread 3 according to the invention using a schematically indicated chain stitch. The sewing thread 3 according to the invention is a cotton thread which, as described in Example 2, was treated with an aqueous solution of a copolymer of vinyl chloride and vinyl acetate and a plasticizer, in the example of diphenyl phthalate, as the precursor material.

After the sewing process, the textile piece 2 is ironed. Here comes through heat, for example in the form of steam, in the area of the thread loops 4 , to the sewn threads 5 running between button 1 and textile piece 2 , in the area of the stitch holes 6 in the textile piece 2 , into the interior of the stitch hole 6 and the rear 7 of the textile piece 2 and thus also in the area of the thread loops 8 located at the rear.

The precursor material is activated by the heat, so that a sticky product forms, which causes that in the area of the thread loops 4 , the stitch holes 6 , inside the stitch hole 6, the surface of the sewing thread 3 both with the textile piece 2 and the individual side by side Genden loops 4 and 8 with each other, as well as the thread loops 4 with the surface of the button 1 , glued. This results in strong adhesive forces in situ, so that the chain stitch seam formed with the sewing thread 3 is practically tear-resistant.

The product formed hardens quickly. There is therefore no disruptive surface stickiness after sewing. This hardening process has a particular advantage. As a result, the sewn threads 5 running between button 1 and textile piece 2 are stiffer than is the case with known threads. This in turn means that additional measures to keep the button 1 at a defined distance from the textile piece 2 can be dispensed with.

Typically, in the prior art (see FIG. 2), the area between the button and the textile piece with additional thread denwicklungen 9 is wrapped spirally, so that the button does not hang down optically, or to increase the security of the chain stitch seam at least something.

However, such measures are not necessary with the sewing thread 3 according to the invention. This has the economically particularly favorable consequence that less sewing thread 3 is required per button 1 and thus the costs for each sewn button 1 remain approximately the same despite the more expensive sewing thread 3 .

Claims (23)

1. Sewing thread, in particular for chain stitch seams, characterized in that it has at least on its outer surface at least one precursor material of a product which gives a seam produced with such a thread increased adhesion to the material to be sewn and / or between individual thread loops of the seam. 2. Sewing thread, especially for chain stitch seams, thereby characterized that he at least on his outer Surface has at least one precursor material, that turns into such a product, which the outer diameter of the sewing thread after sewing by activating one the actual or that apparent volume increasing property, ver enlarged. 3. Sewing thread according to claim 2, characterized in that the increase in diameter between 1 and 200%, ins especially between 1 and 30%, preferably between 30 and 150%, particularly preferably between 40 and 100%, and is particularly preferably between 50 and 80%. 4. Sewing thread according to claim 2 or 3, characterized net that the precursor material is a foamable art fabricist. 5. Sewing thread according to one of claims 1 to 4, characterized characterized in that the precursor material is an adhesive  is. 6. Sewing thread according to one of claims 2 to 4, characterized characterized in that the precursor material Polyte includes trafluoroethylene, which with an expansion material is mixed. 7. Sewing thread according to one of claims 2 to 6, characterized in that the precursor material contains molecules which are able to bring about changes in volume due to conformational changes, the molecules being selected from the group consisting of:
natural or synthetic heteropolymers, in particular special peptides or proteins; natural or synthetic homopolymers, especially polysaccharides. 8. Sewing thread according to one of claims 1 to 7, characterized ge indicates that he is a soul made of tensile material having. 9. Sewing thread according to claim 8, characterized in that the core of the sewing thread comprises a material which is selected from the group consisting of:
natural materials, especially vegetable materials such as alginate, cotton, cellulose, flax, linen, silk, viscose, wool; and
artificial materials, in particular synthetic fibers such as glass filament, Kevlar, carbon fibers, nylon, polyacrylate, polyacrylonitrile, polyamide, polyester, polypropylene, polytetrafluoroethylene, polyvinyl chloride, triacetate;
as well as their mixtures. 10. Sewing thread according to one of claims 1 to 9, characterized ge indicates that the precursor material has at least one physically and / or chemically activatable substance is. 11. Sewing thread according to one of claims 1 to 10, characterized in that the precursor material is selected from the group consisting of:
Silicone resins; Alkyl silicone resins, methyl silicone resins; Aryl silicone resins; Copolymers of vinyl chloride and vinyl acetate, vinyl acetate, polyvinyl acetate; Polysaccha rides, in particular celluloses and their derivatives, cold water-insoluble polysaccharide products; Esters from polysaccharides and inorganic acids, esters from polysaccharides and organic acids; Polysaccharide ethers; Starches, potato starches; Esters from starches and inorganic acids, esters from starches and organic acids; Starch ethers, nitrogen-containing starch ethers, cationic starch ethers, especially their salts; Acrylamides, N- and C-substituted acrylamides or acrylamide oligomers; foamable plastics; inorganic expandable materials such as expanded perlite, expanded mica or expanded graphite, hydrogen carbonate, preferably ammonium hydrogen carbonate; natural resins, in particular tree resins, balsam resins, rosins; as well as their mixtures. 12. Sewing thread according to one of claims 1 to 11, characterized in that the thread contains additional auxiliary substances, selected from the group consisting of:
usual equipment for threads; natural and synthetic waxes; Paraffins; Crosslinkers for growing polymer chains, in particular methylenebis acrylamide or N, N, N ', N'-tetramethylethylenediamine; Plasticizers, especially dibutyl phthalate, diphenyl phthalate, glycerol; inorganic fillers, organic fillers; Activators; Radical starters, peroxides, metal organyls, in particular aluminum organyls; and their suitable mixtures. 13. Sewing thread according to one of claims 1 to 12, characterized in that the precursor material is acrylamide; and
that the auxiliary methylene bisacrylamide and
N, N, N ', N'-tetramethylethylenediamine and gycerol. 14. Sewing thread according to one of claims 1 to 13, characterized in that the precursor material is an aqueous dispersion of a copolymer of vinyl chloride and vinyl acetate; and additionally
a plasticizer, preferably diphenyl phthalate, a stabilizer, preferably cellulose, and optionally a blowing material, in particular ammonium hydrogen carbonate. 15. Sewing thread according to one of claims 1 to 13, characterized ge indicates that the precursor material is a mixture is made of: starch, polyvinyl acetate and tree resin. 16. A method for producing at least largely tear-resistant chain stitch seams for fixing buttons to a textile material, characterized in that

• a) a sewing thread is provided at least on its outer upper surface with a precursor material of a product;
• b) the sewing thread is fed to a sewing device and a button is fixed to a textile material by means of a chain stitch seam; and
• c) the chain stitch seam is subjected to an activation treatment, as a result of which the precursor material converts into the desired product, and the product of the chain stitch seam gives increased adhesion to the button, textile material and between the individual thread loops.

17. The method according to claim 16, characterized in that a sticky product is formed. 18. The method according to claim 16 or 17, characterized in records that the surface with the precursor material by spraying, dipping, continuously or discontinuously is provided. 19. The method according to any one of claims 16 to 18, characterized characterized in that step a) takes place after step b). 20. The method according to any one of claims 16 to 19, characterized in that the precursor material is selected from the group consisting of:
Silicone resins; Alkyl silicone resins, methyl silicone resins; Aryl silicone resins; Copolymers of vinyl chloride and vinyl acetate, vinyl acetate, polyvinyl acetate; Polysaccha rides, in particular celluloses and their derivatives, cold water-insoluble polysaccharide products; Esters from polysaccharides and inorganic acids, esters from polysaccharides and organic acids; Polysaccharide ethers; Starches, potato starches; Esters from starches and inorganic acids, esters from starches and organic acids; Starch ethers, nitrogen-containing starch ethers, cationic starch ethers, especially their salts; Acrylamides, N- and C-substituted acrylamides or acrylamide oligomers; foamable plastics; inorganic expandable materials such as expanded perlite, expanded mica or expanded graphite, hydrogen carbonates, in particular ammonium hydrogen carbonate; natural resins, in particular tree resins, balsam resins, rosins; as well as their mixtures. 21. The method according to any one of claims 16 to 20, characterized in that additional auxiliaries are used in step a) and / or c), selected from the group consisting of:
usual equipment for threads; natural and synthetic waxes; Paraffins; Crosslinkers for growing polymer chains, in particular methylenebis acrylamide or N, N, N ', N'-tetramethylethylenediamine; Plasticizers, especially dibutyl phthalate, diphenyl phthalate, glycerol; inorganic fillers, organic fillers; Activators; Radical starters, peroxides, metal organyls, in particular aluminum organyls; and their suitable mixtures. 22. The method according to any one of claims 16 to 21, characterized characterized in that step c) chemical and / or phy physical activation, especially thermal activation, Heat sealing, high frequency activation, light, ins special UV light activation, chemical polymerisa tion, chemical hardening, radical start; or their com binations.   23. Chain stitch seam, in particular for fixing a Button, with a sewing thread according to one of claims 1 until 14.