EP1192308B1 - Method for producing elastic bands for the clothing industry - Google Patents

Description

Technical area

The invention relates to a process for the production of elastic and stretchable tapes of a Einlagoffoffbahn having at least partially synthetic fibers or filaments for use in the clothing industry.

The garment industry needs for a variety of purposes, such as inserts in suits, jackets, blouses and the like tapes associated with the garment fabric, this a high stability coupled with elasticity. In this case, the bands of a given direction to give the fabric increased strength. Also, a design should be maintained or stabilized. The use of tapes, for example, in the longitudinal direction, a high stability, but in the transverse direction have a reduced strength, is not desirable in many cases. These strengths, however, arise in the bands cut from Einlagestoffbahnen in that the Einlagestoffbahn often, be it in the weaving process or even in the production of nonwoven webs, in their longitudinal direction a higher strength than in transverse or intermediate directions.

The invention is therefore based on the object to provide a method can be produced with the bands that have high strength, but at the same time have the same flexibility and strength in a given direction of the Einlagestoffbahn.

The solution of the object is achieved in a method of the type mentioned in the present invention in that one or more industrially manufactured Einlagestoffbahnen is folded together and connected to each other at their open edges or are and a tube is formed, and that the wall of the tube is cut obliquely, so that a new elastic Einlagoffoffbahn arises, which is then cut in the longitudinal direction to tapes. By this procedure, the directions of the warp and weft threads are changed in a fabric and the main direction of the fibers or filaments in a nonwoven web. The original orientation of the warp threads in the longitudinal direction of the alumina web or fibers and filaments in a nonwoven web is changed and lies in the new Einlagestoffbahn obliquely to its longitudinal direction. In the case of the tapes then cut from the inlay fabric web, the warp and weft threads or fibers and filaments in the case of a nonwoven fabric are therefore likewise at an angle to the longitudinal direction of the tapes.

For the production of the new interlining fabric from which the bands are cut, two equal width Einlagestoffbahnen can be superimposed and connected at their open edges. This procedure is very simple from the machine side. But it is also possible to take only a nonwoven web, which is folded in half in the longitudinal direction and also at their open Edges is connected together, so that a hose is formed. While in the former possibility on both sides of the Einlagestoffbahnen the open edges are connected and consequently two devices are to be used for this, in the second-mentioned possibility only a device for connecting the open edges is needed.

There are various possibilities for connecting the open edges conceivable. However, particularly preferred is the connection of the edges by ultrasonic or laser beam technology. Compared to a mechanical seam connection by sewing this results in several advantages. Thus, a connecting seam is formed, which has a high strength. Comparative tearing tests have shown that an ultrasound-produced seam has a higher strength than the adjacent fabric, ie in tensile tests tears the fabric and not the seam. This is different with a sewn seam where the seam breaks in the tensile test while the fabric is holding. This is also understandable from the fact that when cutting the hose, the thread of the connecting seam is cut. Another advantage is that the seam is as good as not visible, or can be formed as good as not visible. In order for the seam to appear as little as possible, it is expedient that the seam allowance of the fabric web or the fabric webs beyond the joining line of the edges is cut off. With a sewn connection, this can only be limited. The sewn edge therefore occurs in the finished volume in appearance. In many cases, this seam can be unfavorable in the further processing of the tape and it is necessary that the seams must be cut from the tape, which means a high waste. By contrast, in the case of a connection by means of ultrasound or laser beam technology, the seam allowance can be cut off completely or to a minimum until the ultrasound seam produced by ultrasound and at the new extended Einlagofondbahn the junction is as good as not visible. It can be saved significantly in both the production of the tube and in the subsequent processing considerable web material. Cutting the seam pieces from the finished tape is no longer necessary. The cutting angle at which the tube is cut, which lies between a transverse line to the fabric and the cutting line, is determined by the application of the bands. It is convenient to set it at 8, 12 or 38 °. The greater the cutting angle, the greater the elasticity of the new Einlagestoffbahn in nonwoven webs and thus the tapes produced therefrom.

The tapes thus produced are used in their final processing in the most varied places of clothing. From this it may be necessary that they are in addition to confectioning. This can for example take place in that the cut tapes are provided by lockstitch, chain stitch or blind stitch with a seam. It is also possible and is often practiced that several of the cut bands are connected by lockstitch, chain stitch or blind stitch.

The inventive method is particularly well suited for the production of tapes which are cut from a nonwoven web. Nonwoven webs whose fibers and / or filaments are oriented predominantly in the longitudinal direction of the nonwoven web are preferably used here. The formation of a tube of such nonwoven webs, its cutting and the creation of the new nonwoven web, an oblique orientation of the main fiber direction is achieved, which leads to the desired properties in the cut from the new nonwoven web belts.

Reference to the embodiments illustrated in the drawings, the invention is explained in detail.

Fig. 1

schematisch den Verfahrensablauf,

Fig. 2

schematisch und vergröbert im Schnitt die Herstellung eines Schlauchs aus zwei Stoffbahnen,

Fig. 3

eine Draufsicht auf die Stoffbahnen nach Figur 2,

Fig. 4

schematisch die Bildung eines Schlauchs aus einer Stoffbahn;

Fig. 5

einen Schlauch mit angedeuteter Schnittlinie und

Fig. 6

die neue Stoffbahn mit Einschnitten für die Herstellung der Bänder.

It shows

Fig. 1

schematically the procedure,

Fig. 2

schematically and coarsely in section the production of a tube of two panels,

Fig. 3

a top view of the panels of Figure 2,

Fig. 4

schematically the formation of a tube from a fabric;

Fig. 5

a hose with indicated cutting line and

Fig. 6

the new fabric with cuts for the production of the ribbons.

Embodiment of the invention

In the figure 1, the method is shown schematically, for an embodiment in which two webs are used. Two original webs are used, which are produced by industrial processes known per se. The two webs are folded together and their open edges joined together by ultrasound and simultaneously cut off the seam allowances present on both sides of the webs. In this way, a hose has been formed, which is fed to a further cutting device and there obliquely is cut open. The inclined slitting creates a new fabric in which the main draw direction no longer runs along the fabric but obliquely to the longitudinal orientation of the web. The wound fabric is cut into individual slices and further assembled.

In Figures 2 and 3, the two panels 1 and 2 are shown coarsely drawn. They lie one above the other and are connected to each other at their open edges 3 and 4, or 5 and 6 by ultrasound and cut. The ultrasonic device is indicated by the arrows 7 and 8 and the counter-bearings 9 and 10 located underneath. After the edges 3, 4 and 5, 6 of the webs 1, 2 are connected to each other, a tube 11 is formed.

FIG. 3 shows in a top view the seams 14, 15 of the panels 1 and 2 projecting beyond the edges 3, 4 and 5, 6, respectively, due to the joining lines 12, 13 produced by the ultrasonic welding process, which are simultaneously cut off.

FIG. 4 shows the possibility in which a nonwoven web 16 is folded in half in the longitudinal direction 17 and the open edges 18, 19 are connected to one another. The joining process takes place in the same way as in the figure 2, by the ultrasonic device 7 and 9. Again, the seam allowance is separated and a tube 11 is formed.

FIG. 5 shows the hose 11 with the cutting line 20 through the wall 21. The cutting angle w of the material web 16 is set to approximately 38 °.

The cutting process results in a new fabric 22, in which the main orientation of the warp threads or fibers or filaments of the Nonwoven web now obliquely and not in the longitudinal direction of the web. By dashed lines in Fig. 6 drawn double arrow 23, this direction is indicated.

FIG. 6 shows, as an example, the cutting lines 24 for the belts 25, which are cut from the new one-day clothing web 22. The bands 25 may be subjected to further fabrication steps as are known in the art. For example, they can be connected with each other or with other materials by lockstitch, chain stitch or blindstitch. Its longitudinal direction is identical to the longitudinal direction 26 of the new elastic fabric web 22.

Claims (10)

1. Method for the production of elastic and stretchable bands from an insert cloth web having at least partially synthetic fibres of filaments, for use in the clothing industry, characterized in that one or more industrially produced webs (1, 2; 16) is or are folded together and connected to one another at their open edges (3, 4; 5, 6; 18, 19) and a tube (11) is formed, and in that the wall (21) of the tube (11) is cut open obliquely, so as to give rise to a novel, more elastic cloth web (22) which is cut in the longitudinal direction (26) into bands (25).
2. Method according to Claim 1, characterized in that two cloth webs (1,2) of equal width are laid one above the other.
3. Method according to Claim 1, characterized in that one cloth web (16) is folded together in half in the longitudinal direction (17).
4. Method according to one of Claims 1 to 3, characterized in that the connection of the edges (3, 4; 5, 6; 18, 19) is carried out by means of the ultrasonic or laser-beam technique.
5. Method according to one of Claims 1 to 4, characterized in that the seam addition (14, 15) of the cloth web (1, 2) or cloth webs (1, 2) which projects beyond the connecting line (12, 13) of the edges (3, 4; 5, 6) is cut off.
6. Method according to one of Claims 1 to 5, characterized in that the cutting angle (w) of the obliquely cut-open wall (21) of the cloth web (1, 2; 16) is 8, 12 or 38°.
7. Method according to one of Claims 1 to 6, characterized in that the cut bands (25) are provided with a longitudinal seam by two-thread lock stitch, chain stitch or blind stitch.
8. Method according to one of Claims 1 to 6, characterized in that a plurality of the cut bands (25) are connected to one another by two-thread lock stitch, chain stitch or blind stitch.
9. Method according to one of Claims 1 to 8, characterized in that a nonwoven web (1, 2; 16) is used, the fibres and/or filaments of which are oriented predominantly in the longitudinal direction (17) of the nonwoven web (1, 2; 16).
10. Method according to one of Claims 1 to 9, characterized in that the cloth web is a nonwoven web (16).

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