EP1524351B1 - Method of reinforcing textiles - Google Patents

Description

The invention relates to a method for reinforcing textile fabrics, in which a spunbonded fabric is applied to and connected to the areas of the fabric to be reinforced, and a device for carrying out the same.

Textile fabrics, in particular fabrics, knitted fabrics, but also nonwovens, are used, inter alia, in the production of clothing and other textiles and articles. These materials are often provided with a partial or full-surface reinforcement.

In particular, in the field of garments, as well as other textiles, it has been proven to stick the materials, which are commonly referred to as outer fabric, with a separate, sheet-like reinforcing material, a so-called Einlagestoff. The interlining materials are usually nonwoven fabrics, knitted fabrics or fabrics provided with an adhesive mass which are bonded to the outer fabric under heat and pressure. By choosing the fibers, e.g. The nonwoven production and the solidification method can be specifically set here the properties of the interlining material. In general, the nonwovens are produced here as a spunbonded fabric, wherein endless individual filaments are entangled and deposited on a carrier tape as mentioned in EP 0 363 254. Subsequently, this spunbonded nonwoven must be coated with an adhesive layer, e.g. in DE 32 48 889, provided, in order then to be connected to the outer fabric. However, this known type of reinforcement of materials is very expensive, since the outer fabric parts and the Einlagestoffteile must first be cut separately, the cut parts are positioned exactly on each other and then connected together in a fuser.

In order to simplify this process, a reinforcement has been proposed, for example, in DE 100 49 706, wherein a substance forming the reinforcement is applied selectively in the flowable state to the material to be reinforced. The steps of cutting the interlining fabric and the exact positioning of the two materials on each other is therefore no longer necessary. To reinforce this here Apply material to the outer fabric, it is necessary, however, that the substance is in a flowable state, so that it can be sprayed onto the outer material, sprayed or the like. For this purpose, it is necessary to put the substance to be applied with water or solvents in order to achieve the flowable state. However, additional drying steps are necessary, and it must be ensured that the added substance, ie water or solvent, does not penetrate the outer material and possibly leaves stains.

From DE 2 819 547 a process for stiffening textile fabrics of different size for the production of clothing by coating the same with plastic is known. In this case, the application of the plastic takes place via a printing cylinder, wherein the plastic supplied as a paste is connected by the pressure directly to the textile fabric. No indication can be found in this document with regard to the plastic used or with regard to necessary carrier substances of the same.

DE 2 552 878 also relates to a method of reinforcing a fabric in which a distribution of a reinforcing material as a fluid is applied to one surface of the fabric such that the reinforcement does not penetrate to the other fabric surface. In this case, the fluid is preferably applied as a pattern with strong directional dependence, for example by imprinting discontinuous and continuous lines over a printing cylinder. In order to avoid a variety of imprinting devices, it is proposed to apply the gravure printing method in the first place, while possibly bringing the printing rollers into and out of contact with the passing fabric during the printing process, whereby optional zones with and without imprinting can be produced. Printmasks are also mentioned in this context. A disadvantage of the plastic reinforcement, however, is that the O-blank blank is reinforced only by printing a plastic compound, but by far not reached the full-textile handle, as can be achieved with an outer fabric provided with interlining. The only reinforced with plastic outer material is flat and hard in this context, especially if the printed plastic resin material penetrates into the outer fabric.

To solve this problem, DE 301 46 56 proposes a method for reinforcing outer fabric blanks for garments by raster-shaped printing of the back of the outer fabric with an aqueous, crosslinkable, flock-binding dispersion paste by a gravure printing, flocking and curing by heating, in which the Dispersion paste electrostatically flocked, coagulated by heat and / or predrying pre-stabilized and condensed in a further operation in a heated chamber in the stack at 90 to 140 ° C. As a result, the reinforced outer fabric part should have a fuller and more textile effect, and essentially correspond to an insert-reinforced outer fabric part. Again, however, the proposed method, in particular by the necessary additional process steps, very expensive and therefore does not represent a real alternative to the known Einlagestoffen.

It is therefore an object of the invention to provide a simple and flexible method of reinforcing fabrics, such as e.g. Outer fabrics, as well as to provide a device for this.

With regard to the method, this object is achieved by a method for reinforcing textile fabrics, in which a spunbonded fabric is applied to and bonded to the regions of the fabric to be reinforced, by removing the spunbonded fabric by depositing a multiplicity of filaments or filamentary segments emerging from a spinneret assembly is made directly on the fabric. The spunbonded fabric is therefore no longer produced in a separate step, but produced directly on the outer fabric, i. the outer fabric serves as a carrier layer for the spunbonded fabric in this case. Thus, the steps of trimming the interlining material are also eliminated, the process is simplified and can be performed faster.

Furthermore, this makes it possible to directly achieve a connection between the outer fabric and the spunbonded, so that the necessary adhesive layers in the state, as well as the previously required fixing steps omitted. Since the spunbonded fabric lays on the surface of the outer fabric, there is no risk that the quality of the fabric will change as a result of the application of the spunbonded fabric.

Advantageously, the spunbonded fabric can be applied in multiple layers on the material. This makes it possible to adapt the type of spunbonded fabric to the respective textile fabric, i. depending on whether a lighter material or a heavier material is processed, or whether a lighter or a rigid reinforcement is desired.

Furthermore, the spunbonded fabric can be applied over its entire surface on a textile fabric to be reinforced. This has proved particularly useful when the material is either to be fully reinforced, or completely reinforced sections should be cut out of the thus reinforced sheet.

Advantageously, the spunbonded fabric can be applied in sections, preferably within predetermined outlines, on a textile fabric to be reinforced. This has proved particularly useful when the textile fabric is reinforced in the form of a continuous web with the spunbonded fabric, wherein the spunbonded nonwoven fabric is applied in sections to the outer fabric parts to be cut later, e.g. in the area of hems, Revere, slits, etc., as well as in reinforcing already cut parts that are to be reinforced only in sections.

It has proved to be particularly advantageous if the spunbonded fabric is applied along the outlines of the elements to be cut out of textile fabrics. If the reinforcement is applied exclusively in the area of later cut edges of the outer material parts or material parts, it is possible to reinforce the cut edges, whereby fraying of the textile fabric during cutting is avoided. Fraying protection is a particular advantage of the present invention.

According to another preferred embodiment, the spunbonded fabric can be applied in different regions of a textile fabric to be reinforced of different thickness, thickness or density. This makes it possible, within a continuous material web already the different auszuschneidenden elements take into account the different areas to be reinforced.

According to a further preferred embodiment, elements with predetermined outlines can be cut from the textile fabric after application of the spunbonded nonwoven fabric. In this case, it has proven to be particularly preferred that the spunbond-reinforced textile fabric is cut along and / or within the outlines formed by the spunbonded fabric, preferably by the edge region formed by the spunbonded fabric. This measure in turn takes into account the protection against fraying of the textile fabric.

Advantageously, the application of the spunbonded fabric can take place by means of one or more spinneret arrangements. It is preferred that the spunbonded fabric is applied computer-controlled. In particular, when applying the reinforcement by a computer-controlled application device, it is possible to provide a textile surface web with maximum material utilization close to tight with corresponding contours reinforcements or full-surface reinforcements. This allows material reinforcement with maximum utilization of the material of the web on the textile fabric.

Advantageously, the spunbonded web is applied by the spunbond process or by the meltblown process. Both of these methods have been proven in the production of spunbonded nonwovens.

According to a further preferred embodiment, the textile fabric can be heated prior to application of the spunbonded nonwoven.

According to another preferred embodiment, the surface of the textile fabric can be pretreated first and then the spunbonded fabric can be applied. Here, in particular, the corona process for pretreatment has proven particularly useful, since this can easily be achieved a change in the surface.

Both of the aforementioned method steps, to which the textile fabric is subjected before application of the spunbonded fabric, serve to improve the affinity of the spunbonded fabric to the textile fabric. Both of these method steps are easy to perform and can be easily integrated into the existing procedure.

The process according to the invention can be operated continuously or discontinuously.

According to a further preferred embodiment, the filaments or filament sections can be formed from a thermoplastic polymer. Preferably, the thermoplastic polymer may be selected from the group comprising polyurethanes or polyolefins such as polyethylene or polypropylene, polyamides, polyesters, polylactides or the like. These materials have proven to be particularly suitable in use and provide a secure connection with the textile fabric to be reinforced.

With regard to the device, the invention is achieved by a device for carrying out the method, which has a carrier for a fabric and a spinneret assembly for depositing a plurality of emerging from the spinneret assembly filaments or filament sections directly on the sheet.

Consequently, the apparatus according to the invention combines processes which were previously carried out separately from one another. Thus, the formation and application of the spunbonded fabric takes place as a reinforcement of textile fabrics, directly on the textile fabric, which in this case assumes the role of the wearer. This eliminates the previously necessary storage costs for interlinings, as well as the complex fixing steps, which requires an exact positioning of the interlining.

Advantageously, the applicator can be moved over the textile fabric in a computer-controlled manner. This allows the exact positioning of the reinforcements, while at the same time it is possible to form a wide variety of reinforcements on a single web of a textile fabric.

According to another preferred embodiment, the spinneret assembly may comprise a spinneret having a plurality of spinnerets. By means of the spinning beam and the spinnerets, the individual filaments are easily generated, which then lie on the fabric.

Advantageously, the carrier and / or the spinneret assembly may be arranged to be movable parallel to the plane of the textile fabric. This makes it possible to easily create even complicated patterns on the fabric.

Furthermore, the device may comprise a pair of counter-rotating rollers, through which the fabric provided with the spunbonded fabric is feasible. Through these rollers, an additional adhesion of the spunbonded fabric to the fabric can be achieved. In this case, it is possible either to cool or to heat the rolls, depending on whether the spunbonded fabric has already completely bonded to the textile fabric or whether the spunbonded fabric should be applied more densely to the textile fabric.

Advantageously, the device may comprise means for heating the textile fabric before depositing the filaments or filament sections on the textile fabric. Another preferred embodiment of the device may provide a corona system for the surface treatment of the fabric before depositing the filaments or filament sections on the textile fabric. The additional spreading of a device or system for surface treatment of the textile fabric, the connection properties between spunbonded fabric and the fabric can be further improved.

A preferred embodiment of the present invention will be explained in more detail with reference to a drawing.

Fig. 1

eine schematische Seitenansicht einer erfindungsgemäßen Vorrichtung zum Verstärken flächiger Materialien, und

Fig. 2

eine Draufsicht auf die Arbeitsfläche der Vorrichtung gemäß Fig. 1.

It shows:

Fig. 1

a schematic side view of a device according to the invention for reinforcing sheet materials, and

Fig. 2

a plan view of the working surface of the device according to FIG. 1.

The device shown in view 1 comprises a worktop 1, on which a textile fabric 2 is spread. The textile fabric 2 is in this case unwound continuously from a supply roll 3 and conveyed over the worktop 1 in the direction indicated by the arrow. The worktop 1 serves at the same time as a carrier for the textile fabric 2 and may include an integrated conveyor. Furthermore, the worktop 1 may be provided with holding means, e.g. Suction, be provided to hold the fabric 2 immovably in position. This may be necessary in particular during the application of the reinforcement.

Above the worktop 1, a spinning beam 4 is arranged, from which a plurality of filaments or filament sections are deposited on the textile fabric 2 continuously or discontinuously. The spinneret beam extends in this case perpendicular to the direction of movement of the textile fabric 2 over the entire material web and can have a plurality of mutually parallel rows of spinning bores 5 as shown in FIG. By means of these spinnerets, filaments which are confused and entangled when hitting the textile fabric are deposited as reinforcements directly on the textile fabric. Here are used as starting materials thermoplastic polymers which are melted and spun into fine filaments. The spun threads are usually stretched aerodynamically and thus obtain a desired strength. The filaments are deposited on the textile fabric 2, where the individual filaments are randomly disordered, ie confused, distribute and deposit.

Equally, it can also be provided that the melt emerging from the spinning bores 5 is entrained by a high-pressure and high-temperature air flow, so that fibers with a small thickness are formed, which then likewise deposit on the textile fabric and form a spunbonded nonwoven here.

At the time when the filaments or filament sections impinge on the textile fabric 2, they have a sufficiently high temperature to bond to each other and to the textile fabric 2 so as to form a permanent bond between the textile fabric 2 and the spunbonded fabric 6 to achieve.

The deposition of the individual filaments or filament sections in the form of a spunbonded fabric 6 on the textile fabric 2 can be carried out continuously, with only the textile fabric moving under the spinning beam 4. Similarly, the spinning beam 4 can be moved back and forth transversely as well as longitudinally to the textile fabric 2, this is particularly advantageous if not the complete fabric should be provided with the reinforcement, but only individual previously determined sections. The textile fabric 2 provided with the spunbonded fabric 6 is guided by the spinneret assembly 4 to two rollers 7, 8 arranged opposite one another behind the work plate 1, between which the textile fabric 2 provided with the spunbonded fabric 6 is received. By the pressure exerted by the rollers contact pressure, the connection between the spunbonded fabric 6 and the textile fabric 2 is further enhanced, in addition, a compaction of the spunbonded fabric can be achieved. For this purpose, it would be possible to heat one or both rollers additionally by means provided for.

Similarly, cooled rolls can be used to cool the composite of spunbonded fabric 6 and textile fabric 2 before the further process steps to the working temperature. In this context, a corresponding cooling even without the use of rollers through a cooling chamber, through which the done with the spunbond textile fabric is carried out continuously done.

Subsequently, the composite of spun-bonded nonwoven fabric and textile fabric is placed on a further work surface 9 and fed back to a cutting device 10 which is at least provided with a cutting means 11, e.g. a conventional knife or laser or plasma jets provided. The cutting device 10 can hereby be similar to the spinneret arrangement computer-controlled transversely and arranged longitudinally displaceable by the textile fabric. In this way it is possible to cut even complicated shapes from the fabric.

Subsequently, the cut material sections are transferred via a further conveying device 12 to the next method steps.

In addition to the device described above and the corresponding method sequence, it can be provided that the textile fabric is pretreated before the filaments or filament sections are deposited in an upstream process step. Such a pretreatment of the textile fabric may in this case lead to an even improved bond between the spunbonded fabric and the textile fabric.

Suitable pretreatments include, on the one hand, the heating of the textile fabric before the filaments or filament sections are deposited on the textile fabric. In this case, the filaments or filament sections are applied to the preheated sheet. On the other hand, the surface of the textile fabric can be pretreated so as to obtain a structure which results in better adhesion of the spunbonded fabric to the surface. Here, the corona process has proven particularly useful.

Fig. 2 shows an example of a textile fabric, which has been provided by the method according to the invention with a spunbonded fabric. Here is an example of the production of garments is shown. 2 shows a plan view of a material web, where all individual sections to be cut out are shown. In this case, the areas to which the spunbonded fabric has been applied are shown in full black. Since the spinneret beam 4 is moved computer-controlled over the textile fabric 2, it is possible to position the reinforcement produced by the spunbonded fabric exactly on the textile fabric 2, wherein even very fine lines become possible. From Fig. 2 it is clear that not only the necessary reinforcements are made with the spunbonded fabric, but that all outlines 13 of the cut out fabric blanks are provided with a border of the spunbonded fabric. In this case, it is possible to provide the different reinforced regions with reinforcements which differ from each other, ie certain reinforcements can be made denser than others.

After application of the individual reinforcements and, if appropriate, after cooling thereof, the reinforced flexible fabric 2 is fed to the cutting device 10. In this case, the cutting out of the bordered material sections preferably takes place within the marking formed by the spunbonded nonwoven. In this way, fraying of the material during the cutting process and during the further processing steps can be prevented.

Claims (28)

1. Method for reinforcing flat textile formations (2), in which a spun-bonded fabric (6) is applied to the areas of the flat formation (2) to be reinforced and joined thereto, characterised in that
   the spun-bonded fabric (6) is produced by placing a multiplicity of filaments or filament sections emerging from a spinneret arrangement (4) immediately on to the flat formation (2).
2. Method according to claim 1, characterised in that the spun-bonded fabric (6) is applied to the flat textile formation (2) in multiple layers.
3. Method according to claim 1 or 2, characterised in that the spun-bonded fabric (6) is applied over the entire surface of a flat textile formation (2) to be reinforced.
4. Method according to claim 1 or 2, characterised in that the spun-bonded fabric (6) is applied on a flat textile formation (2) to be reinforced in sections, preferably within preset outlines (13).
5. Method according to one of claims 1 to 4, characterised in that spun-bonded fabric (6) is applied along the outlines (13) of elements to be cut out of the flat textile formation (2).
6. Method according to one of claims 1, 3, 4 and/or 5, characterised in that the spun-bonded fabric (6) is applied in various areas of a flat textile formation (2) to be reinforced with different strength, thickness or density.
7. Method according to one of claims 1 to 6, characterised in that elements with predetermined outlines (13) are cut out of the flat textile formation (2) after the spun-bonded fabric (6) has been applied.
8. Method according to one of claims 4 to 7, characterised in that the flat textile formation (2) reinforced with spun-bonded fabric (6) is cut to size along and/or within the outlines (13) formed by the spun-bonded fabric (6), preferably through the edge area formed by the spun-bonded fabric (6).
9. Method according to one of claims 1 to 8, characterised in that the applied spun-bonded fabric (6) is cooled before the flat textile formation (2) is cut to size.
10. Method according to one of claims 1 to 7, characterised in that the flat textile formation (2) is cut to size before the spun-bonded fabric (6) is applied.
11. Method according to one of claims 1 to 10, characterised in that the spun-bonded fabric (6) is applied by means of one or more spinneret arrangements (4).
12. Method according to one of claims 1 to 11, characterised in that the spun-bonded fabric (6) is applied by computer control.
13. Method according to one of claims 1 to 12, characterised in that the spun-bonded fabric (6) is applied by the spun bonding method.
14. Method according to one of claims 1 to 12, characterised in that the spun-bonded fabric (6) is applied by the meltblown method.
15. Method according to one of claims 1 to 14, characterised in that the flat textile formation (2) is heated before the spun-bonded fabric (6) is applied.
16. Method according to one of claims 1 to 14, characterised in that the surface of the flat textile formation (2) is pretreated and that the spun-bonded fabric (6) is subsequently applied.
17. Method according to claim 16, characterised in that the surface of the flat textile formation (2) is pretreated by the corona method.
18. Method according to one of claims 1 to 17, characterised in that the method is carried out continuously.
19. Method according to one of claims 1 to 17, characterised in that the method is carried out discontinuously.
20. Method according to one of claims 1 to 19, characterised in that the filaments or filament sections are made of a thermoplastic polymer.
21. Method according to claim 20, characterised in that the thermoplastic polymer is chosen from the group comprising polyurethanes or polyolefins, such as polyethylene or polypropylene, polyamide, polyester, polylactides or similar.
22. Device for carrying out the method according to one of claims 1 to 21, characterised by a carrier (1) for a flat textile formation (2) and a spinneret arrangement (4) for placing a multiplicity of filaments or filament sections emerging from the spinneret arrangement immediately on to the flat formation (2).
23. Device according to claim 22, characterised in that the spinneret arrangement (4) can be moved over the flat textile formation (2) by computer control.
24. Device according to one of claims 22 or 23, characterised in that the spinneret arrangement (4) comprises a spin-dye manifold with a multiplicity of spinnerets.
25. Device according to one of claims 22 to 24, characterised in that the carrier conveyor (1) and/or the spinneret arrangement (4) are arranged as movable parallel to the plane of the flat textile formation (2).
26. Device according to one of claims 22 to 25, further comprising a pair of rollers (7, 8) running in opposite directions, through which the flat textile formation (2) provided with the spun-bonded fabric can be conducted.
27. Device according to one of claims 22 to 25, further comprising devices for heating the flat textile formation before the filaments or filament sections are placed on the flat textile formation (2).
28. Device according to one of claims 22 to 25, further comprising a corona system for surface treatment of the flat textile formation (2) before the filaments or filament sections are placed on the flat textile formation (2).

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