METHOD FOR ASSEMBLING TEXTILE ADHESIVE TAPES

Abstract

A method for assembling cable wrapping tapes. From an adhesive tape parent roll, strip-like adhesive tapes (11), each having two cut edges (12a) on the sides, are produced from a textile material which has an adhesive coating (12) on one side, by cutting in the drawing direction of the parent roll. The cutting is performed using an ultrasound-excited cutting tool (1) and wherein the cutting is performed using a cooled cutting tool (1). An adhesive tape (11), having a strip-like textile carrier material (13) and an adhesive coating (12) applied to one side and two cut edges (12a) on the sides. The cut edges (12a) are created by ultrasound cutting, and the textile carrier material (13) of the carrier is fused to its cut edges (12a). No adhesive coating (12) exists on the cut edges (12a); which are free of lint and threads.

Claims

1. A method for assembling textile adhesive tapes, in particular cable wrapping tapes, comprising the steps of forming from a tape parent roll of a textile material with an adhesive coating attached to one side by cutting in a withdrawal direction of the parent roll from a plurality of strip-like adhesive tapes with two cut edges on the sides, performing ultrasound cutting, whereby an ultrasound excited cutting tool is used and whereby the ultrasound cutting occurs with simultaneous cooling in the cutting area or of the cutting tool, so that a fusing of the adhesive coating is prevented.

2. The method according to claim 1, further comprising providing a cutting tool made up of a sonotrode and an opposite facing cutting wheel, whereby the adhesive tape runs between them the sonotrode and the cutting wheel, and the sonotrode or the cutting wheel is cooled during the ultrasound cutting process in a way that the formation of a liquid separating film due to fusing of the adhesive coating is prevented.

3. A method according to claim 1, further comprising the ultrasound cutting occurs at a cutting angle () from 90 to 145.

4. A method according to claim 1, further comprising providing a PA woven fabric, a PET woven fabric, a PET stitch-bonded non-woven fabric, or a PET fiber-bonded fabric is used as a carrier material for the adhesive tape.

5. A method according to claim 2, further comprising the adhesive coating faces the cutting wheel.

6. A method according to claim 1, further comprising using an acrylate adhesive or a synthetic rubber adhesive for the manufacture of the adhesive coating.

7. An adhesive tape, manufactured according to claim 1, having a strip-like textile carrier and an adhesive coating attached to one side and two cut edges on the sides, further comprising the cut edges are created by the ultrasound cutting, whereby the textile carrier material of the carrier is fused to the cut edges; and no adhesive coating exists on the cut edges; and the cut edges are free of lint and threads.

8. An adhesive tape according to claim 7, further comprising in the area of the cut edges, a lesser tape thickness exists than in a remaining edge area.

9. An adhesive tape according to claim 7, further comprising a PA woven fabric, a PET woven fabric, a PET stitch-bonded non-woven fabric, or a PET fiber-bonded fabric is used as a textile carrier material of the carrier.

10. An adhesive tape according to claim 7, further comprising the adhesive coating is made from an acrylate adhesive or a synthetic rubber adhesive.

11. An adhesive tape according to claim 7, further comprising the carrier material of the carrier has a surface weight of 60 g/m.sup.2 to 300 g/m.sup.2.

12. An adhesive tape according to claims 6, that further comprising the adhesive material of the adhesive coating has a coating weight of 40 g/m.sup.2 to 200 g/m.sup.2.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Below the invention will be discussed in greater detail based on examples of embodiments making reference to the appended Figures, which show:

[0034] FIG. 1 is a view of a cutting device used in the method according to the invention,

[0035] FIG. 2 is a view through a cutting wheel of a cutting tool used according to the invention, and

[0036] FIG. 3 is a cross-section view of an adhesive tape manufactured according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0037] In a method according to the invention for assembling textile adhesive tapes 11, see with particular reference to FIG. 3, in particular cable wrapping tapes, a plurality of strip-like adhesive tapes each with two edge cuts 12a are created from one adhesive tape parent roll with a one-sided adhesive coating 12 attached by cutting in the drawing direction Z of the parent roll, whereby the cutting occurs by ultrasound. In this example, an ultrasound excited cutting tool is used, and the ultrasound cutting occurs with simultaneous cooling of the cutting area and/or of the cutting tool. In this example, there is a forward pushing speed of 25 m/min., with which the parent roll is withdrawn.

[0038] In FIG. 1, an example of an embodiment is shown of an ultrasound-cutting tool used according to the invention. In this embodiment, the cutting tool 1 consists of a sonotrode 2 and a facing cutting device 3, whereby this cutting device 3 has a cutting wheel 4. The sonotrode 2 transmits the sound through the substrate to be cut onto the facing cutting wheel 4, in the present case a textile carrier material 13 of an adhesive tape parent roll provided with an adhesive layer 12. The cutting wheel 4 has the function of separating the material and in each case fusing or sealing the cut edges 12a, whereby the coated tape runs between the cutting wheel 4 and the sonotrode 2, as shown in FIG. 1. The geometry of the cutting wheel 4 is adjusted according to the desired cutting result. In addition, the ultrasound system of the cutting tool 1 has an ultrasound generator, not illustrated, which is attached to an ultrasound converter 6 via an appropriate connector, to which the sonotrode 2 is attached at the end. Through the ultrasound converter 6, electronically created vibrations of the generator are converted into mechanical movements. These mechanical movements are transferred to the coated material to be cut via a transformation piece 7 and a cutting sonotrode 2 prepared for this application. In fractions of seconds the ultrasound vibrations create a cut through the coated material to be cut. A standard frequency area of a sonotrode 2 used according to the invention lies between 20,000 Hz up to and including 90,000 Hz. For example, a vibration frequency of 30 kHz and an amplitude height of the vibration of 15 to 30 can be created. According to the invention materials of 0.05 to 180 mm thickness can be cut. The particular cutting width depends on the structural form of the sonotrode 2. A minimum width is about 5 mm; the maximum cutting width is defined variably.

[0039] According to the invention, it is advantageous if the cutting angle of the cutting wheel 4 is 90 to 145, see FIG. 2. For a cutting angle , the applicable angle is the one that is enclosed by the cutting wheel side surfaces 4b in a cutting edge 4a of the cutting wheel 4, see FIG. 2. This cutting angle can be created by a corresponding polishing of the cutting wheel 4. The standard chemical fibers can be considered as textile carrier materials, whereby the carrier materials may be formed for example as woven fabric, non-woven fabric, stitch bonded non-woven fabric, or fiber-bonded fabric. Advantageously, the carrier materials that are used have a surface weight between 30 g/m.sup.2 and 300 g/m.sup.2. Adhesive materials for the adhesive coating 12 that are used are in particular synthetic rubbers or acrylate adhesive materials, in particular poly-acrylate materials. The adhesive application weight is preferentially between 40 g/m.sup.2 and 200 g/m.sup.2. Their melting point ranges from 70 C. to 250 C. In synthetic rubber adhesives, the melting point is 80 C. to 160 C. The textile thread material and/or fiber material that is used, for example polyamide or polyamide 6.6, has a melting point of >200 C. or >250 C., or for example a polyester that is used has a melting point of >210 C. The particular plastic becomes fluid above the given melting points.

[0040] Also to be recognized from FIG. 1, according to the invention it is advantageous if the sonotrode 2 is cooled by a cooling device, for example through internal air cooling, for which for example an appropriate attachment unit 8 on the converter 6 is available for inserting cooling air. In addition, it is advantageous according to the invention that additionally or alternatively the cutting device 3, that is, the cutting wheel 4, is cooled by a cooling unit 10, in which in particular cool air is introduced through an exit jet 14 by air cooling in the cutting area. The cooling of the sonotrode 2 and/or of the cutting wheel 4 prevents the cutting layer 12 of the carrier material from becoming fluid in the cutting area and creating a separating film. In this example according to the invention, the adhesive coating 12 is prevented from spreading out into the cutting edge area, so that according to the invention the cutting edge area, that is, the lengthwise edge 12a of the adhesive tape, is free of the adhesive material of the adhesive coating 12. In addition, in this way in particular secure sealing is effected in connection with the cutting angle area according to the invention, that is, the fusing of the carrier material in the lengthwise edge area, meaning on the cutting edge 12a. Thereby a cutting edge free of lint and thread occurs, which is also free of adhesive material.

[0041] Exemplary embodiments are contained in the following examples of methods 1 to 4.

METHOD EXAMPLE 1

[0042] Cutting cable wrapping tapes with PA fabric 185 g/m.sup.2 with a cooled sonotrode and a cooled cutting wheel.

TABLE-US-00001 Cutting angle 20 45 90 110 120 140 145 degrees degrees degrees degrees degrees degrees degrees Film creation heavy heavy Minimal/ No No No Minimal none Heat fusing No partially Yes Yes Yes Yes Yes of the edges Thread creation Yes Yes Yes No No No No Lint creation Yes Yes Yes No No No No

METHOD EXAMPLE 2

[0043] Cutting cable wrapping tapes with PET fabric 130 g/m.sup.2 with a cooled sonotrode and a cooled cutting wheel.

TABLE-US-00002 Cutting angle 20 45 90 110 120 140 145 degrees degrees degrees degrees degrees degrees degrees Film creation heavy heavy No No No No Minimal Heat fusing No partially Yes Yes Yes Yes Yes of the edges Thread creation Yes Yes No No No No No Lint creation Minimal Minimal No No No No No

METHOD EXAMPLE 3

[0044] Cutting cable wrapping tapes with PET fabric 70 g/m.sup.2 with a cooled sonotrode and a cooled cutting wheel.

TABLE-US-00003 Cutting angle 20 45 60 90 110 120 140 145 degrees degrees degrees degrees degrees degrees degrees degrees Film creation heavy heavy Minimal No No No No No No Heat fusing Minimal partially Yes Yes Yes Yes Yes Yes of the edges Thread creation Yes Yes Yes No No No No No Lint creation Yes Yes Yes No No No No No

METHOD EXAMPLE 4

[0045] Cutting cable wrapping tapes with PET stitch-bonded non-woven fabric 60 g/m.sup.2 with a cooled sonotrode and a cooled cutting wheel.

TABLE-US-00004 Cutting angle 20 45 60 90 110 120 140 145 degrees degrees degrees degrees degrees degrees degrees degrees Film creation heavy heavy Minimal No No No No No No Heat fusing Minimal partially Yes Yes Yes Yes Yes Yes of the edges Thread creation Yes Yes Yes No No No No No Lint creation Yes Yes Yes No No No No No

[0046] In accord with a set surface weight of the carrier material, it results that according to the invention it is advantageous for the minimum cutting angle to be 90 and the maximum cutting angle to be 145, with a cooling of the sonotrode 2 and a cooling of the cutting wheel 4. The embodiments in the method examples 1 to 4 have a cutting angle according to the invention greater than or equal to 90.

[0047] The method Examples 5 to 7 show that either with omitted cooling of the sonotrode 2 and of the cutting wheel 4 or of an alternative cooling of sonotrode 2 or cutting wheel 4 or with other cutting angles, a poor fusing of the cutting edges takes place, and additionally thread and lint formation is not prevented.

METHOD EXAMPLE 5

[0048] Cutting cable wrapping tapes with PA woven fabric 185 g/m.sup.2 without cooled sonotrode and cutting wheel.

TABLE-US-00005 Cutting angle 90 degrees 110 degrees 120 degrees Film creation very heavy very heavy very heavy Heat fusing of the edges Minimal Minimal Minimal Thread creation Yes No No Lint creation Yes Yes Yes

METHOD EXAMPLE 6

[0049] Cutting cable wrapping tapes with PA woven fabric 185 g/m.sup.2 without cooled sonotrode and cutting wheel.

TABLE-US-00006 Cutting angle 90 degrees 110 degrees 120 degrees Film creation very heavy very heavy very heavy Heat fusing of the edges Minimal Minimal Minimal Thread creation Yes Yes Yes Lint creation Yes Yes Yes

METHOD EXAMPLE 7

[0050] Cutting cable wrapping tapes with PA woven fabric 185 g/m.sup.2 with cooled sonotrode and without cooled cutting wheel.

TABLE-US-00007 Cutting angle 90 degrees 110 degrees 120 degrees Film creation Minimal Minimal Minimal Heat fusing of the edges Yes Yes Yes Thread creation Yes Yes Yes Lint creation Yes No No

[0051] The following table gives examples of embodiments, without limiting the invention, for construction of woven fabric and fiber fabric as well as for the adhesive layer of textile adhesive tapes according to the invention, in particular cable wrapping tapes.

TABLE-US-00008 PA woven PET woven PET woven PET woven Unit fabric fabric 130 g/m.sup.2 fabric 70 g/m.sup.2 fabric 60 g/m.sup.2 Surface weight g/m.sup.2 185 130 70 60 carrier Type of fiber Polyamide 100% 100% 100% 6.6 Polyester Polyester Polyester Number of warp 1/cm 20 45 32 20 threads Yarn type of warp Filament, Filament, Filament, Filament, threads smooth or intermingled/textured intermingled/textured intermingled/textured textured, and and and dyed as dyed by spin dyed by spin dyed by spin spun or by jets jets jets item Number of item 68 36 36 24 filaments in warp threads Thread strength of dtex 470 167 84 40 the warp threads Warp threads dtex/ 9400 7515 2688 800 strength cm according to width Number of weft 1/cm 16 25 30 30 threads Yarn type of weft Filament, Filament, Filament, Filament, threads smooth or intermingled/textured intermingled/textured intermingled/textured textured, and and and dyed as dyed by spin dyed by spin dyed by spin spun or by jets jets jets item Number of item 68 36 36 36 filament weft threads Thread strength of dtex 470 167 167 167 the warp threads Warp thread dtex/ 7520 4175 5010 5010 strength cm according to length Adhesive material Acrylate Acrylate Synthetic Acrylate adhesive adhesive rubber adhesive material material material Applied adhesive g/m.sup.2 100 80 50 40 weight Thickness mm 0.33-0.35 0.24-0.25 0.14-0.16 0.10-0.12 Elongation at % 21-35 35-40 26-38 15-18 rupture Breaking force N/cm 400-1.100 200-350 80-150 50-100

[0052] The invention is not limited to the embodiments that are shown and described, but rather includes all embodiments that act the same way within the meaning of the invention. It is expressly claimed that the embodiments are not limited to all the characteristics in the combinations, but rather every individual partial characteristic may have an inventive significance separate from all the other partial characteristics. In addition, the invention is not limited to the combination of characteristics defined in claim 1, but can be defined as well through any other combination of specific characteristics of all the individual characteristics presented together.

[0053] While the above description constitutes the preferred embodiment of the present invention, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope and fair meaning of the accompanying claims.