Method and device for separating textile products made of synthetic resin fibers

Abstract

The present invention relates to a method and device for thermally separating a textile (10) made of synthetic resin fibers (9). According to the invention, an impact pulse acts on the textile (10). The textile (10) is placed in a single layer between a pair of unheated impact jaws (2, 4), whereby the textile is separated and a separated edge (12) is formed. The synthetic resin of the synthetic resin fibers (9) that is melted during the impact pulse is limited to the area of ​​the separated edge (12).

Description

[Technical Field]

[0001] The present invention relates to a method and device for the thermal separation of textiles made from synthetic resin fibers, such as woven fabrics, knitted fabrics, nonwoven fabrics, ropes, cords, and yarns, all of which are made from dissolvable synthetic fibers. [Background technology]

[0002] Known methods for processing webs of flat material, such as separating films by impact pulses using a film punch according to publication DE 10 2015 211 622 A1, are unsuitable for separating textile products in such a way that after separation of the textile product or rope a separated edge is formed which protects against fraying at the edge.

[0003] JP 58-78605 proposes a solution for separating textile products by impact pulses. A continuously generated tear line is divided into segments of the required length by individual impact pulses. However, continuous high-speed processing is not described.

[0004] The impact device and process according to US Patent No. 4,747,455 is capable of producing individual impacts, no sequential process is described. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] German Patent Application Publication No. 102015211622 [Patent Document 2] Japanese Patent Application Publication No. 58-78605 [Patent Document 3] U.S. Patent No. 4,747,455 Summary of the Invention [Problem to be solved by the invention]

[0006] It is therefore an object of the present invention to provide a robust, uncomplicated and rapid method for the thermal separation of textiles based on or consisting of synthetic resin fibers and for continuous application, while at the same time preventing the textiles from unraveling. Another object of the present invention is to provide an energy-saving and simple device for separating textiles with corresponding properties. [Means for solving the problem]

[0007] The object of the present invention is achieved by a method for the thermal separation of textiles based on or consisting of synthetic resin fibers, where the synthetic resin fibers must be meltable, their melting point being below the temperature reached during the impact pulse.

[0008] An impact pulse, in which at least one of the impact elements penetrates the textile in a stroke movement perpendicular to the textile for less than 10 ms, is applied to the textile, arranged in at least one layer, between a pair of unheated impact elements. The unheated pair of impact elements also exists when the impact element operates against the anvil, which is the junction point. This junction point or anvil then forms the second impact element of the pair. Heating of the impact elements is not necessary. On the contrary, this would be disadvantageous, especially if heating as an external heat supply would soften the textile. Therefore, preheating of the textile is also excluded. Thus, "unheated" means that the temperatures of the impact element and the textile are kept below the softening temperature of the textile. If the impact element or the textile is slightly heated for other reasons, this does not affect the method of the present invention, and the impact element or the textile is considered unheated or not preheated within the method of the present invention.

[0009] According to the present invention, opposing impact elements are used in high-speed continuous processes. The thermal separation method is preferably integrated into high-speed continuous processes or high-speed machines or systems. This is particularly applicable to continuous web induction processes with continuous feed, for example, systems for producing industrial textile products such as face masks. Such systems operate, for example, at 100 cycles per minute.

[0010] The separating edge in a textile made of synthetic resin fibers, such as a woven fabric, knitted fabric, nonwoven fabric, or a ripe, cord, or twisted yarn, is made of synthetic resin fibers fused together. It is produced by or during thermal separating of the textile. Thermal separating is defined as when the textile is first compressed or deformed at an effective point, so that the heat required for separating, particularly for forming the separating edge, is generated in the textile, which together results in the thermal melting of the synthetic resin fibers.

[0011] For this purpose, an impact pulse is applied to the textile, which is arranged in at least one layer, between a pair of unheated impact elements. The impact pulse occurs between the unheated impact elements. In either case, it is not necessary to heat the impact elements; on the contrary, heating, especially as an external heat source, can be disadvantageous if it leads to premature softening of the textile and thus impairs the heat generation during formation. Therefore, preheating of the textile is also excluded. Thus, "unheated" in the present invention means that the temperature of the impact element and the textile is kept below the softening temperature of the textile. If the impact element or the textile is slightly heated for other reasons, this does not affect the method according to the present invention, and the impact element or the textile is considered unheated or unpreheated within the method according to the present invention. If the pair is not identical and one impact element acts on a joint or anvil, there is also a pair of unheated impact elements, and the joint or anvil then forms the second impact element of the pair.

[0012] The impact pulse is a stroke movement of at least one of the impact elements perpendicular to the textile layer, with the penetration time of at least one of the impact elements into the textile being less than 10 ms. In this case, the impact pulse, preferably generated by a mechanical drive, acts on the textile to separate the textile and form a separated edge. This is achieved by directly fusing the separated synthetic resin fibers of the textile to each other, because the material is reshaped with the heat generated during the separation process. The synthetic resin fibers are thereby fixed, preventing undesired separation of the textile from the edge, i.e., fraying. The separated edge is formed by the impact pulse penetrating the textile and deforming the separated edge, thereby temporarily heating and melting the fibers. This heating is limited to the immediate influence zone, i.e., the area adjacent to the separated edge region.

[0013] The separating edge can be applied to, for example, woven, knitted, warp-knitted, or nonwoven fabrics, or ropes, threads, or cords. Thus, the synthetic resin melted during the impact pulse is precisely limited to the area of ​​the separating edge. In contrast, conventional melting processes heat and melt larger areas due to a lack of targeted heating. This results in larger hardened areas and, in some cases, an unattractive appearance.

[0014] The precise limitation of the separation edge to a narrow area is particularly advantageous in the case of woven, knitted, warp-knitted, or nonwoven fabrics that are cut as pre-made pieces according to the present invention, and in the case of simultaneous hemming with a separation edge. By limiting the separation edge to a minimum, there are no hardened areas that would damage the garment or ruin its visual appearance, unlike conventional melt processes.

[0015] Further importance of the separating edge and the associated processes for its creation exists in the field of industrial textiles, for example in nonwoven fabrics for filters or for the production of batteries. In mass production, shaping processes have clear advantages over incremental processes, such as laser cutting, with the added advantage that the present invention is a low energy consumption and simple, safe system technology.

[0016] In addition to cutting, it has been shown that embossing can also be produced in textiles by impact pulses. This is produced when an impact element strikes the textile according to the contour of the impact element. This effect can be used for other purposes, such as solidifying materials, imprinting information, or for design purposes.

[0017] The solidification of the surface is carried out using a more or less flat impact element. This can also be applied to wider edges where other elements are attached, such as rubber bands on a filter mask. For example, the joining of rubber bands can also be carried out according to the invention by impact pulses, and welding or a meltable adhesive can be used. The temporary heating required in each case is also introduced into the material by the impact pulse and the resulting deformation.

[0018] The edges of the small holes can also be generated by solidifying the surface, and the necessary openings of the small holes can be cut out before or after. Then, solidification occurs as well as the formation of the separation edges by melting as a result of one or more impact pulses. The application of impact pulses can also be performed selectively, in which case multiple solidification points arranged in a row result in the desired surface. While row-shaped punches are used for separation in the form of separation edges, more or less flat shapes are advantageous for melting to form the surface or for thermal bonding.

[0019] Due to the rapid increase in temperature, there is little effect on the material temperature, unless the material unfavorably softens. The same applies to the impact element, which does not need to be preheated, because the temperature required for bonding occurs in the textile itself within a very short time during the pulse. Therefore, heating and melting of the textile is advantageously limited to the immediate influence zone and short contact time. Due to the fast deformation rate, adiabatic heating of the textile occurs in the influence zone with minimal energy input and without heat exchange with the surrounding air and adjacent areas of the textile. Only liquefaction of the synthetic resin fiber material is required for the formation of a separation edge by melting the fiber ends. This also prevents liquid material from the melted fibers from being extruded from the bonded area and unnecessarily thickening the separation area.

[0020] Preferably, the impact pulse is generated by a mechanical drive, and when the impact pulse acts on the textile, the textile is separated at that point, forming a compressed area and / or a separated edge, followed by a return stroke of the at least one impact element. The impact pulse has at least a first intensity F i1 The impact pulse acts on the textile with a second intensity F i2 When the impact element acts on the textile product, the textile product is separated between the impact elements and, depending on the contour of the impact element, compressed separation edges or at least partially melted separation edges made of melted synthetic resin fibers remain on both sides of the separation line.

[0021] Additionally, time is saved and energy input is reduced. Such a narrow, heat-affected zone cannot be achieved with conventional methods of fusing the edges or ends of textiles because the heat diffuses rather quickly, resulting in an increased area of ​​heated and softened textile. It has been found that the melt width during separation is limited to no more than twice the textile layer thickness.

[0022] In the step before the impact pulse, the textile is subjected to a pretension force F between a pair of impact elements. v The impact elements are then pressed against each other with a force of 0.001 V. The impact pulse of at least one of the driven impact elements is then applied or transmitted by at least one of the impact elements and finally acts on the textile. In this way, instead of the tool dropping directly onto the textile, the overlapping textiles are first pressed together. This compensates for the roughness of the tool surface and, in particular, the roughness of the textile. In all cases, temperature effects occur in the impact zone where the separation edge is formed, resulting in localized heating. Due to the mechanical stresses that occur when the impact pulse penetrates during the penetration time with a correspondingly high deformation speed, this leads to a very short dissolution of the synthetic resin from which the synthetic resin fibers are made.

[0023] In a step prior to the impact pulse, the textile is subjected to a pretension force F, preferably by at least one pretensioning roller. v It has been found to be advantageous that, when subjected to a shock, an impact pulse from at least one of the subsequently activated impact elements acts on the textile product. In order to carry out the treatment in this way continuously, the pretensioning device is designed as a rotating pretensioning roller, under which the web can move.

[0024] At least one driven impact element may be moved within a pretensioning roller and performs an impact pulse whenever aligned perpendicular to the textile.

[0025] In an alternative embodiment, the impact pulse generated by at least one of the driven impact elements acts indirectly on the textile and is transmitted via at least one pretensioning roller. For this purpose, the impact pulse is initially applied to at least one pretensioning roller by at least one impact element. Assuming that at least one of the impact elements applies an impact pulse to the pretensioning roller, this pretensioning roller is designed to transmit the impact pulse. The impact pulse is introduced indirectly into the textile via the pretensioning roller. For this purpose, the pretensioning roller may have a suitable profile at its peripheral surface or a diameter that allows applying an impact pulse of appropriate profile and intensity.

[0026] According to another alternative, the impact drive can also act on the pretensioning roller or on an additional roller of corresponding contour, which in this case acts only as an impact element. The additional impact element can then be omitted.

[0027] The melting remains confined to the affected zone, so that the environment is not affected by unwanted heat input (e.g., burning areas around the separated edges of the textile, as with conventional melting methods), nor is heat dissipated to the environment as energy loss.

[0028] The impact pulse is preferably generated by a mechanical or magnetic drive, so that the mechanical drive of the impact element is direct, or the impact pulse is transmitted indirectly by a spring force, a drop weight, a magnetic drive, or a cam gear. Using a cam gear, particularly fast movements can be controlled without delay and with precise amplitude. In particular, the spring force and the drop weight can be manually introduced into the position where they generate the force, so that the method according to the invention can be carried out without an external energy supply.

[0029] If the pairs are not identical and one impact element is a passive, flat junction, there may also be a pair of impact elements that are not heated, with the flat junction then forming the second impact element of the pair. The impact pulse is a stroke movement of at least one of the impact elements that takes less than 10 ms to penetrate the textile, proceeding essentially perpendicular to the textile. Depending on the thickness of the textile, the penetration time is preferably 5 ms or less, particularly preferably less than 1 ms. To generate the impact pulse, the tool is pushed onto the textile, preferably at an initial speed of 1-5 m / s, and braked to a stop during the penetration time. The impact pulse is preferably generated by a mechanical drive, alternatively by an electromagnetic drive.

[0030] The impact pulses are applied by the upper impact element or alternatively by both opposing impact elements. In particular, in the case of opposing impact elements, they are used for high-speed continuous processing or for high-speed machines or systems, in particular for continuous web guiding processing with continuous infeed, for example in systems for manufacturing industrial textile products such as face masks. The opposing impact elements, which operate at, for example, 100 cycles per minute, are integrated into this system. The impact elements can be designed as rollers. They can also function as infeed rollers, for example, and apply a pretension force F v while applying a pulse force F i is transferred to the textile by impact on the roller.

[0031] The object of the present invention is also achieved by a device for separating textiles made of synthetic resin fibers by thermal separation, which is defined as the textile being first compressed or deformed by an impact element penetrating into the effective area, whereby the heat required for separation, in particular for forming the separating edge, is generated in the textile and melts the synthetic resin fibers together.

[0032] For this purpose, the device comprises a pair of unheated impact elements, between which the textile product is placed in at least one layer during the separation process; the device for generating pulses introduces an impact pulse to at least one of the impact elements during the heat treatment, which then acts on the textile product, separating it at the separation point and forming separation edges on both sides of this separation point.

[0033] When one impact element acts on a junction that is a flat anvil, there is also a pair of unheated impact elements, and the junction then forms the second impact element of the pair. The device for generating a pulse is designed to introduce an impact pulse into at least one of the impact elements. The impact pulse is a stroke movement of at least one of the impact elements in a direction perpendicular to the textile layer, which has a penetration time into the textile of less than 10 ms. The impact pulse acts on the textile and forms a separation edge in the effective area of ​​the impact element by melting the synthetic resin fibers at the edge of the textile. The impact pulse is preferably generated by a drive device.

[0034] According to the invention, the first and / or second impact element is designed to work in a high speed continuous process, in particular in a web guiding process with continuous feeding, as described above for the method according to the invention.

[0035] According to an advantageous embodiment of the method and device, the first and / or second impact elements are designed as rolling tools and act in a web guiding process with continuous infeed. Alternatively, the first and / or second impact elements can be designed as tools that pivot towards an effective point, as is customary and commonly known in web guiding processes for a particular process stage, or as tools that are temporarily supported with the web during separation or embossing, so that impact pulses can be applied while the web is advancing. The co-supported tools can also consist of other fixed impact elements, but they are guided at the speed of the web during the impact pulse and then more rapidly returned to their starting position.

[0036] The device of the present invention is therefore suitable for installation in complex systems, thereby also replacing established techniques for separation. It is advantageous if the pair of impact elements are made of hardened steel with a polished surface. Additionally, each impact element includes an element for attachment to a drive device.

[0037] According to another advantageous development, the pretension force F v is provided, whereby the impact element is subjected to a pretensioning force F before the impact pulse is applied. v are pressed against each other by

[0038] In a preferred embodiment, the pair of impact elements comprises at least a first impact element with an effective area having a shaped cross section. It has also proven advantageous if the pair of impact elements includes a second impact element with a wedge-shaped effective area. An advantageous shaped cross section has a wedge-shaped profile bounded by two radius ranges R2 with any contour shape and a width covering at least the effective zone—separating edge. According to a first alternative, the shaped cross section is formed in the radius range R1. According to a second alternative, the shaped cross section is wedge-shaped with an angle α relative to the flat effective area of ​​the second impact element, the tip of the wedge being formed in the radius range R3. In general, regardless of the configuration of the shaped cross section, it is advantageous if the main profile is bounded by a radius range to prevent undesired twisting of the textile at the edge of the profile. It has also proven advantageous if the pair of impact elements includes a second impact element, usually the lower one, with a flat effective area or shaped cross section.

[0039] According to a first embodiment, the drive device acts on the first impact element, or according to a second embodiment, on the first and second impact elements. The drive device for generating the impact pulses comprises a spring, a drop weight, or a mechanical gear. According to an advantageous embodiment, the mechanical gear is a cam gear, the advantages of which have already been explained above. A magnetic drive is also provided, which directly drives the impact element or the associated punch.

[0040] Compared to established separation processes, the encapsulation process proposed by the present invention offers the following advantages: Highly cost-effective and robust systems and tool technology; · Purely mechanical and manually operated solutions can be implemented (spring pretensioning); · Very short processing time; Special separation and embossing patterns can be achieved by using contour patterns in the tool; · Very low energy requirements resulting in very high energy efficiency; · Advantageous as a shape-based process as it is faster than bulk incremental processes (e.g. lasers).

[0041] The above advantages result in advantageous areas in the following applications: · Continuous processing due to fast processing speed; Application for separation by pretensioning of springs for mobile use without electrical energy; · Technical textiles, such as nonwoven fabrics for filters and capacitor production.

[0042] The invention will be explained in more detail below on the basis of the description of embodiments and the associated figures. [Brief explanation of the drawings]

[0043] [Figure 1] 1 is a schematic diagram of a process sequence of a method according to the invention for separating textile products; [Figure 2] 1A-1C are schematic perspective views of three embodiments of impact elements according to the invention with different effective areas; [Figure 3] 1 is a schematic perspective view of an embodiment of a first impact element according to the invention with an effective area of ​​a flat molded cross section; FIG. [Figure 4] 10 is a schematic perspective view of an embodiment of a second impact element according to the present invention with a flat effective area. FIG. [Figure 5] 1 is a schematic side view of an embodiment of a continuous web guiding process. [Figure 6] 10 is a schematic side view of another embodiment of a continuous web guiding process. [Figure 7] 1 is a schematic view of an embodiment of a device according to the invention, in which the textile has been separated; [Figure 8] 1 is a schematic enlarged view of a separated textile product with separated edges. [Figure 9] 1 is a schematic enlarged view of separated synthetic resin fibers of a textile product with separated edges. [Figure 10]1 is a schematic enlarged view of synthetic resin fibers of a textile product with compressed effective zones. DETAILED DESCRIPTION OF THE INVENTION

[0044] 1 shows a schematic diagram of an embodiment of a process sequence of the method according to the invention for separating textiles 10 inserted in a device 1 in double layers using impact pulses. The process sequence is shown in three steps, starting from the left. In the first step, a first impact element 2 separates the textiles 10 along the machine feed path s z 1, the first impact element 2 is moved in the direction of the arrow along the effective contour 6' towards the surface of the textile 10 until the effective contour 6' comes into contact with the textile 10. The two textiles 10 to be separated, which preferably also receive a separating edge 12, come to rest on the surface of the second impact element 4, here designed as a flat anvil. The effective contour 6' of the first impact element 2 is wedge-shaped.

[0045] In a second step, the first impact element 2 applies a pretensioning force F v With the preload thus created, which compensates for the roughness and elasticity of the textile 10, a pulse force F i is applied to separate the textile 10, which dissolves briefly in the process, also resulting in the formation of separated edges 12.

[0046] The described processing sequence is repeated in rapid succession when used in the high speed continuous processing provided by the present invention.

[0047] 2 shows three schematic perspective views of embodiments a), b), and c) of an impact element 2 according to the invention, each with a different profile. In a), a flat profile with a flat working area bounded by two radius ranges R2 can be seen. In the exemplary effective profile 6, the preferred radius R2 is 1-4 mm, and the flat profile has a width of 0.1-0.5 mm. Such similar, and in particular wider, profiles are primarily used for compression.

[0048] In b), the cross section is wedge-shaped and is particularly suitable for separation, forming the effective contour 6 as used in Figure 1. In c), the cross section is designed as a radius, also suitable for separation, but the separation edge 12 is compressed and overall wider.

[0049] Figure 3 shows a schematic perspective view of an embodiment of a first impacting element 2 according to the invention with an effective area 6 of flat profile, as shown in detail in Figure 2. Mounting openings 8 are provided for the insertion of clamping bolts (not shown), by means of which the first impacting element 2 is fixed to an impacting element holder 26 (Figure 5) of a machine. This machine applies a pretensioning force F to the first impacting element 2. v and pulse force F i applies.

[0050] 4 shows a schematic perspective view of an embodiment of a second impacting element 4 according to the invention with a flat anvil-like active area. The second impacting element 4 is mounted in an impacting element holder 28.

[0051] 5 shows a schematic side view of an embodiment of a continuous web guiding process, in which the textile product 10 proceeds from two web rollers 40 and is fed to the device 1 in two layers. In the device 1 for separating the textile product 10, the textile product 10 proceeds in two layers between the first impact element 2 and the second impact element 4, where separation and the formation of the separation edge 12 take place (in the example, the separation edge 12 has not yet formed and is not yet separated). However, precautions must be taken to ensure the continuity of the web guiding process even during the application of the pretensioning force, and in particular the impact pulses. This can be achieved, for example, by periodically moving and returning the device 1 in and against the web guiding direction, or by using web accumulators after the web rollers 40 and before the device 1 (both not shown but known in the art).

[0052] 6 is a schematic side view of another embodiment of a continuous web guiding process. A pretensioning force is applied by pretensioning rollers 42, between which the textile 10 advances in two webs. A device for generating pulses 30, in particular an impact gear, acts on one or both of the pretensioning rollers 42, causing the textile 10 to separate, leaving a separating edge 12 at the separation point.

[0053] Figure 7 shows a schematic side view of an embodiment of the device 1 according to the invention during separation of the textile 10, with the simultaneously formed separation edge 12. This is particularly evident in the enlarged view of Figure 8. The device 1 comprises impact elements 2, 4, which are shown after a return stroke, releasing the separated textile 10, with the separation edge 12 on both remaining parts of the textile 10 after separation.

[0054] FIG. 8 shows a schematic enlarged view of a separated textile product 10 with a separated edge 12. FIG. 8 illustrates how the synthetic resin fibers 9 are fused together, thereby forming the separated edge 12. Among other things, this ensures that the textile product 10 remains protected from undesired degradation even after separation, preventing the individual synthetic resin fibers 9 from breaking apart. Examples include woven, knitted, or nonwoven fabrics, where the separated edge can replace the edge. Another example of application of the method according to the invention is a textile product such as a rope, thread, or cord, where the separated edge forms an end that is secured against fraying. Without such protection, the synthetic resin fibers 9 may break apart from the edge after being cut without other measures, and the textile product 10 would gradually split apart.

[0055] 9 shows a schematic enlarged view of a synthetic resin fiber 9 belonging to a separated textile product 10 with a separated edge 12. The heat affected zone 13 is shown by a dashed line, which indicates that the heat generated in the material by the impact pulse is limited to the separated edge 12.

[0056] 10 shows a schematic enlarged view of a compression impact point, which is a compressed area 11 of synthetic resin fibers 9. The textile material 10 is formed from a plurality of synthetic resin fibers 9. The area of ​​the synthetic resin fibers 9 next to the compressed area 11 does not thicken, as in other prior art thermal separation or welding methods where liquid synthetic resin material is extruded from a melting area. This clearly shows that excess synthetic resin material is not melted or displaced.

[0057] Rather, the heat affected zone 13, which is bounded by the unaffected area of ​​the synthetic resin fiber 9, is shown by the dashed line and is limited to the area of ​​the compression bond 14. Neither the synthetic resin fiber 9 nor any area outside of it is affected by the unwanted heating. [Explanation of symbols]

[0058] 1 device 2. First impact factor 4. Second Impact Element 6 Scope 6' effective outer diameter 8 Mounting opening 9. Synthetic resin fibers 10. Textile products and textile materials 11 Compression Region 12 Separation edge 13 Heat affected zone 20 Impact Press 22 Stand 24 Operating lever 26 First impact element holder 28 Second impact element holder 30 (Devices) for pulse generation 32 Feeding Device 40 Web Roller 42 Rolling tool, pretension roller a Effective outer width R1 First effective outer diameter R2 Second effective outer diameter R3 Third effective outer diameter F v Pretension force F i Pulse force and impact pulse strength s z Machine feed path

Claims

1. 1. A method for thermally separating a textile (10) made of synthetic resin fibers (9), comprising: applying impact pulses to the textile (10) arranged in at least one layer between a pair of unheated impact elements (2, 4), the stroke movement of at least one of the impact elements (2, 4) extending perpendicular to the textile (10), such that the time for at least one of the impact elements (2, 4) to penetrate into the textile (10) is less than 10 ms, whereby the textile (10) is separated between the impact elements (2, 4) and a separated edge (12) of bonded synthetic resin fibers (9) is formed, characterized in that the opposing impact elements (2, 4) are used in a high-speed, continuous process.

2. 2. The method according to claim 1, wherein the first and / or second impact elements (2, 4) are configured as rolling tools (42), the rolling tools (42) moving along a web-guided process of continuous feeding.

3. 2. The method according to claim 1, wherein the first and / or second impact element (2, 4) is configured as a tool pivoting towards an effective point, the tool acting in a continuous feeding web guiding process.

4. 2. The method according to claim 1, wherein the first and / or second impact element (2, 4) is configured as a tool carried with the web during the separation process, said tool acting in a continuous infeed web guiding process.

5. In a step before the impact pulse, the textile (10) is subjected to a pretension force F by at least one pretensioning roller (42). ｖ The method according to any one of claims 1 to 4, wherein an impact pulse of at least one of the activated impact elements (2, 4) then acts on the textile (10).

6. 3. The method according to claim 2, wherein an impact pulse transmitted by at least one of the driven impact elements (2, 4) via at least one pretensioning roller (42) acts on the textile (10), and at least one impact element (2, 4) initially applies an impact pulse to the at least one pretensioning roller (42) and transfers it to the textile (10).

7. A method according to any one of claims 1 to 6, wherein the mechanical drive that generates the impact pulses is provided by a spring force, a drop weight, a magnetic drive or a cam gear.

8. Method according to any one of the preceding claims, wherein the impact pulse is applied by the upper impact element (2) only or by both opposing impact elements (2, 4).

9. 1. A device for thermally separating textile products (10) made of synthetic resin fibers (9), the device (1) comprising a pair of unheated impact elements (2, 4) between which the textile products (10) are arranged in at least one layer during the separation process, the device (1) further comprising a pulse generating device (30) configured to introduce impact pulses into at least one of the impact elements (2, 4), characterized in that the device (1) is constructed and arranged such that the first and / or second impact elements (2, 4) act in a rapid succession.

10. 10. The device according to claim 9, wherein the first and / or second impact element (2, 4) is configured as a rolling tool (42) according to the first embodiment, as a tool that pivots towards an effective point according to the second embodiment, or as a tool that is carried along with the web during the separation process according to the third embodiment.

11. A pretensioning device is included, and the pretensioning device provides a pretensioning force (F ｖ ) and applying the pretension force (F) to the impact elements (2, 4) before the impact pulse. ｖ 11. The device according to claim 9 or 10, wherein the two components are pressed against each other by a force of 1000 .mu.m.

12. The device according to claim 11, wherein the pretensioning device is configured as a pretensioning roller (42).

13. 13. The device according to claim 12, wherein at least one of the impact elements (2, 4) applies an impact pulse to the pretensioning roller (42), the pretensioning roller (42) being configured to transmit the impact pulse, and the impact pulse is introduced into the textile (10) by the pretensioning roller (42).

14. A device according to any one of claims 9 to 13, wherein said pair of impact elements (2, 4) comprises at least a first impact element (2) with an effective area having a shaped cross section (6').

15. 15. The device according to claim 14, wherein the shaped section (6') is designed as a radius range R1.

16. 16. The device according to claim 14 or 15, wherein the shaped section (6') is wedge-shaped at an angle α to the flat effective area of ​​the second impact element (4), the tip of the wedge shape being designed as a radius R3.

17. 17. The device according to any one of claims 9 to 16, wherein the pair of impact elements (2, 4) comprises a second impact element (4) with a flat effective area (6) or with a shaped cross section (6').

18. 18. The device according to any one of claims 9 to 17, wherein the pulse generating device (30) is configured to act on only one impact element (2, 4) or on both the first and second impact elements (2, 4) simultaneously.

19. The device according to any one of claims 9 to 18, wherein the pulse generating device (30) comprises a spring, a drop weight or a mechanical gear.

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