DE2817612A1 - METHOD AND DEVICE FOR THE PRODUCTION OF HIGH-FREQUENCY WELDABLE SYNTHETIC RESINS, PREFERRED MATERIALS IN PARTICLE TRAINING, FOR THE PRODUCTION OF COMPOSITES AND PROCESS PRODUCTS - Google Patents

Abstract

Manufacture of textile compound fabrics from elements (30, 31) capable of being interconnected by H.F. welding. The welding is enhanced by addition of plastic materials (5, 51, 52). These plastic materials are resistant to washing agents, cleaning agents, adhesives and have, under the action of a H.F. field, a polar as well as a substantially non-polar behaviour. The elements susceptible to receive the means enhancing the welding may and have to be modified as regards the shape, sections, arranged into a layer with respect to each other and subject to overpressures, to depressions, as well as to other physical, mechanical, chemical, pneumatic, hydraulic, electric and electronic actions, all of this being achieved in machines (I, II, 11, 12, 13, 14) specially designed for this purpose. The products obtained differ from those that are known by the presence in good order within said obtained products of bonding elements made from plastic material particles having a varied dielectric behaviour when they are subjected to an H.F. field.

Description

Method and device for manufacturing high frequency

weldable synthetic resins, preferably in particle form, absorbent Substances used to create composites and manufactured by the process Products The special field of textile joining technology on which synthetic resins are used for education of welded connection elements are used, is based on the known fact t that synthetic resins, which are generally characterized by high-quality electrical insulating properties distinguish, contain polar groups which, although neutral on the whole, within their molecules have positive and negative centers of gravity, called dipoles.

A low or high frequency alternating field once less, a At other times exposed to larger amplitudes, the dipoles are constantly converted and reoriented and too weaker # or.

stronger vibrations excited so that under the effect of a lasting Energy supply Heat arises and is released, with which the synthetic resins melt and the Form the aforementioned welded connecting elements, which has the advantage that In contrast to other connection methods, the environment has no heat flow is exposed to the sensitive substances na part and reducing their Influences the tremor or service life. So there is a directional weld instead of a previous loosening of the HF energy the secondary valence forces the change of place of the Molecules actually do prepared and leads to the flow of material, which is causative under the pressure of the electrodes for the creation of the RF welded joint that is in the form of a molecular If confusion occurs, apolar plastics behave differently. This behavior goes back to the electron distribution in the molecule, which is such that in apolar plastics no dipole moment arises, which is common to the particularly high intermolecular Forces of attraction in polar molecules. The parameter for the dipole moment is Dielectric constant, in which two components have to be distinguished, namely a first real, inertia-free and therefore loss-free, the one in the numerator of a quotient occurs, in whose denominator the second component appears, the relaxation time and thus depends on the frequency, while the quotient as a whole corresponds to the tangent of the in the context of the present consideration, the loss angle that is particularly important is the same, which again is a measure of the thermodielectric behavior of the synthetic resin in the HF field is. The loss angle supplements the phase angle in the current-voltage diagram to 900. As the dielectric gets closer to an electrical conductor, the Loss angle smaller, but it would be incorrect to want to draw the conclusion from this, that the height ielectric values correspond to the polar behavior of mono- and polymers are directly proportional, rather it must be stated that configuration, structure and the distance between the molecules and their position in relation to one another in the polymer assembly are also essential. It also depends on whether the individual monomers a chain vibrate independently or whether the nakromolecule as a whole participates in the vibrations of the electrical system. Questions are also of interest the occurrence of segment vibrations, partial crystallinity, iso- or actaticity, an influence of the polymerization conditions on the structure of the polymer, further Finally, the molecular weight distribution and the low molecular weight ones are significant Proportions. It is known that cooling or even quenching synthetic resins to an increase in the loss angle lead by the in micro- or molecules that are already in macro-Brownian motion, oscillating in a disorderly manner be frozen. Reduction in brittleness and associated increase in Dielectric losses can equally affect the increase in distance in the molecule due to the greater freedom of movement achieved. Dam3tj the installation bulky, but less polar behavior showing monomers by reduction the secondary valence forces possible, which influences the so-called internal softening be touched. The distance increase is also by means of various external Plasticizers attainable, which include monomer, polymer plasticizers and extenders. Finally, the influence of temperature should not go unmentioned, which increases as the temperature increases in increased heat oscillations and thus in increased molecular mobility affects. The loss values increase accordingly, so that the imagination arises could, as products of movement paths and resistance to movement, are under Consideration of the frequency of movement and phase shifts to the applied HF field is a direct physical consequence of the increase in temperature, which is not is the case, the relationships are much more complex after the foregoing and more involved. Rather, the above overview shows that the decisive parameters are so diverse in terms of influencing variables and number that with theoretical considerations alone is not enough to break new ground in joining technology, especially since the scientific community itself takes the view that the statements at hand about all influences of the configuration, chain lengths, chain branches, structure and distance-related intermolecular interactions on the oscillating sequences in no way can lay claim to finality.

First new findings, their correctness and reliability through longer practical tests and executions could be obtained, have the Directed to the present Zrfindun £.

These findings are based on the idea that the dielectric Behavior of a substance is dependent: 1. on its structure or from which it is composed the latter resulting dipole moment, 2. the mobility within the molecule group, which in turn depends on 2.1 adhered to in the manufacturing process Working conditions, 2.2 the use of internal, 2.3 external plasticizers, 2.4 the Substance temperature, further from the applied 2.5 HF field, namely from its 2.5 1 frequency, Potential, but that alone, as essentially 2.5 2, has always been considered is not sufficient, but that, for a decisive increase in the range of variation According to the economic efficiency of the procedure, a 3rd appropriate one must be added Selection of the dielectric and 4. arrangement of the same according to mutual 4.1 distances 4.2 Distribution over 4.3 areas and 4.4 heights of the receptacle or composite under 4.5 adaptation to their 4.5 1 shapes, to 4.5 2 welds, in or between recording and / or composites taking into account 4.5 3 related stresses and measurements of the 4.5 4 connection strength the weld seam layers that are sufficient to cope with these stresses.

Since the requirements for points 1 to 2.5 2 are already introductory was carried out, can now be used to develop the solution and thus the core idea The present invention to be passed over, which consists in the fact that it is through a targeted distribution and thus pre-arrangement of used as welding aids, Detergent, detergent and adhesive synthetic resins with polar behavior succeeds in the amount of welding aid to be applied per unit area of the receiving material to be kept so low that, despite high production costs, it is preferable to consider coming polyamides, copolyamides and modified copolyamides, the required Profitability remains assured, but that it is due to a previously unknown material Differentiation of different types of synthetic resin succeeds, without giving up so far and achieved technical advantages on the path taken so far to come, if it is noted that it is practical besides the aforementioned synthetic resins non-polar or non-polar synthetic resins, synthetic resin and / or plastic hot-melt adhesives, also known as hot melt adhesive, there are often very low initial costs under a more or less strong as well as brief or shorter in time become liquid than previously permanent effects and, if necessary, by the action of pressure, to extraordinarily strong material connections, also with the preservation of the many Applications require elasticity, immediately after cooling down to room temperature, lead to connections referred to as II technical seams. So far they have been not taken into account when welding in the high-frequency field because they only with exceptionally high potential differences between anode and cathode molecularly confuse. They therefore require one leading to inefficiency Expenditure on contact protection, cause the risk of breakdowns and thus Fires and have a number of other disadvantages for which they have been rejected.

As now contrary to the existing prejudice in the result completely different Observations were made when series of experiments were carried out in which From the Ifli textile welding point of view, it is particularly favorable Result showing copolyamides and modified copolyamides, as suggested our own DE-PS 1 903 667, 1 913 209, 1 929 352 and patent application P19 36 199.0-16 are based, in one of the specific BF welded connection tasks Adjusted dosage with plasticizer-free and petrol-resistant PVC / PVA-1 # polymerizates with a much coarser; 7 tangens delta, albeit a lower degree of wetting of the Environment compared to1 largely reducing the amount of deposits of copolyamides, were used together for HF welds, one turned out to be completely surprising strong initial reaction of the PVC / PVA copolymers with the characteristic, very large loss angle, absorbing an energy within the desired low potential difference when generating the HF field, resulting in the necessary Welding temperatures in a time shorter by at least two seconds in inner core area of the absorbent material with 140 ° C and above. This enabled the Use quantities of the copolymers / used copolymers which are significantly higher than the cost Welding aid storage usually up to a little more than a third a welding aid embedding consisting only of copolyamides or modified copolyamides be reduced without affecting the HF weld strength and welding behavior thereby quality and impairments could be determined. The same time and arranged together but separately in a predetermined order and in relation to the proportions based on the given HF welding factors, specific dosage levels gave the added benefit of recycling the maximum tension sufficient for all requirements for strength of the connection between anode and cathode by up to 200 and 240 volts compared to the previously standard values applicable Welding stresses. That result is alone of great importance for textile HF welding technology, because the equipment technology found increases production reliability considerably and because with the reduction the failure and failure rates that were previously considered to be consequences of breakdowns, also known as burnouts, theoretically and practically more or fewer are to be completely eliminated.

Based on these findings and insights, it is characterized to solve the problem, the HF welding technology on welding aids to expand, which were previously considered unusable due to their properties, but which, on the contrary, the expected disadvantages in such a prejudice Transforming advances, inventively proposed methods of manufacture High-frequency weldable synthetic resins1, for example in particle form absorbing substances such as webs, cut sheets, foils and bodies and / or using these Absorbents for the production of composites, in that synthetic resins in proportion mutually different, dielectric behavior in the RF field, preferably both polar and at least practically non-polar in or on the substance for uptake to be brought.

The reference to the fact that synthetic resins are at least non-polar should be the Open up the possibility that so far scientifically valid as apolar substances show the occurrence of properties in practical use, which speak in favor of the fact that the substance, for example as a result of minimal loss angle, so shows a polar behavior in border areas.

In general, the synthetic resins are of different dielectric strengths Behavior separately, preferably layered, brought to the recording. on Details are given in the subclaims and the following statements.

According to what has been said above, it must be assumed that the apolar Synthetic resins or synthetic resin components due to their high initial energy conversion in the HF field as a primary impulse heat generator, for example in a length of fabric, for a maximum of 4 to 6 seconds Let high melting temperatures arise, then by way of a secondary indirect heat transfer within the absorbent material or the web, which was previously At least one plastic or resin also embedded in each dimension further, possibly several types of synthetic resin, to melt, namely without any direct effect on their own dielectric properties.

The general use of a large, sometimes very valuable range obstacles in the form of the Hangels at a sufficient dielectric loss angle are ensured by the present Invention for use in HF welding eliminated in those cases in which the melting point of the apolar synthetic resin is 150/160 ° C or below. Apparently also go from the energy-consuming, impulse-like growth to high temperatures PVC / PVA resins triggering effects on the neighboring non-polar particles so that the occurrence of rocking processes must be taken into account, at least cannot be ruled out, especially since the thought chain is stronger than before expresses that the use of non-polar synthetic resins has not been rejected is because they are not considered dielectrics in the absolute sense, but because theirs Loss angles are too small to be commercially exploitable in the sense previously represented to appear. Since, however, according to the series of experiments, they lead to molecular confusion lead, which is a prerequisite for a welding process, become practical Circumstances are to be named as causal and authoritative for the fact that by means of the invention the aforementioned technical advances have become realizable. Known is particularly that when carrying out large-scale en polymerization / branching are not to be avoided, for example, with high pressure polyethylene with a Thirtieth to one fiftieth smaller than with low-pressure polyethylene with a frequency between five hundredths and one thousandths. Responsible this includes impurities from catalyst residues, such as those when using ZiEGLER catalytic converters can be found more often. Similar behavior is at Determine polytetrafluoroethylene in which all valences are saturated by fluorine are. But that changes again when fluorine is replaced by another halogen, namely through Chlorine, is replaced. The trifluorochloroethylene and its polymers are polar again, (CF3Cl = OF2 = 0.46). These substances can be melted down again in the HF field. Would but one can conclude from this that the abolition of the symmetry within the molecular chain would have to result in corresponding dielectric losses, one would be such Conclusion immediately refuted by the behavior of propylene, because the loss value propylene is only slightly above that of ethylene. Closes one further from the fact that hydrocarbons are generally independent of composition and configuration were wholly or approximately non-polar substances, then such would be Generalization again unfounded, because styrene, for example, is not non-polar, but polar. In addition, the temperature should always be included in such considerations because if due to styrene polymers and even pure polystyrene products it is certain that these substances are particularly high-quality EF-Isoller properties deals with what they are characterized by low loss angles, then that applies only for room temperatures and thus for the freezing range of the substance in which the side group - the benzene ring - is relatively immobile. From what has been said is it can be seen that theoretical considerations that have not been substantiated by empirical findings are useless as discriminants for the procedure leading to the invention, which thus could only arise intuitively If it was stated above, that in a further development of the invention additional advantages arise from it, that synthetic resins in the HF field have different dielectric behavior in the absorbent are introduced separately from each other or brought to it for inclusion, so there is the main advantage is that in this way the recording directions and accordingly the accommodation areas in or on the receiving material can be changed. This is from crucial when in with the help of recording and / or composite materials workpieces to be produced due to their changing training, different Materials, different layers of the latter and other conditions thereby emerging problems can only be mastered by recording and / or Composites at predetermined locations and over defined areas in accordance with the present invention Invention selected and distributed synthetic resins have, their thereby determined Properties are precisely those that help solve the problem at this point or above this area are needed. An exemplary embodiment referring to this specifies in detail what these explanations relate to. That what for the recording material had been carried out initially, on for one with his help Produced composite applies, it follows that the composites then were also listed, because by storage under the influence of HF fields Welding resins in the absorbent material can be used with any of the latter a composite leading further material are cohesively united.

It is not essential to the invention that the recording material the Process is subjected to its entire volume, in individual cases is sufficient it is enough to treat individual layers in this way.

This creates a multiplication of the possibilities of Kunst-Kunstharzifi about resin selection / arrangement; aer synthetic resin particles according to mutual spacing, Layer heights and distribution over areas, areas and heights of both, as well the same measures to be taken in the case of dividing layers of the receiving substance so # Jen, like it the Adaptation to its shapes, materials, subdivision of layers, their height structure and weld seams to be produced in, on and / or between these layers taking into account the loads attributable to these under occurrence correspondingly high connection strengths of the seams required. This applies accordingly again for each composite. In the context of the technical achieved according to the invention Progress is worth noting that by incorporating the synthetic resins polar behavior the extraordinarily high clawing ability in the welding aid layer smooth surfaces of the receiving material after completion of their recrystallization, the after liquefaction in the HF field at least about 24, at most 48 hours required, is largely retained. This also applies to the remarkable property of the polar welding aid parts, residues aggravate adhesion or clawing Layer stains from grease, wax and other adhesive agents as well as from non-stick Absorb impregnations. The ability to maintain the melting temperature is also retained to lower, with some copolyamides to below 9000 with liquefaction, the Suitability for the application of HF welding technology to sensitive materials, like pure silk, thin and thinnest textile fabrics made of synthetics, whereby In addition, the influences of favorable grain shapes, grain sizes, flow properties, specific weight, bulk weight, but also all for $ t # ilization, monitoring, Grinding analyzes etc. of the input material serving and necessary allowances.

Except for the previously discussed possibility, on the distribution of the synthetic resin particles To take influence by dividing the absorbent material into layers gives there is a second possibility to achieve the same thing that the receiving substance, be it as a whole, be it after the previous work in shifts, during or after the sweat-out with the accommodation Changes in shape on or in iim will be subject to, as they are according to our own earlier proposals already successfully used for the same purpose has been brought are. Since only pliable materials come into question as AuinM # o materials anyway, if you from a pure accumulation of solids through sticking, dusting, heat sealing Or the like. Apart from that, materials such as foams, spunbounds, fleeces, nonwovens are used and other # elastically yielding materials subjecting to warping, flexing or otherwise so deformable that especially under the simultaneous influence of Vibrations, application of ultrasound, underpressure and / or overpressure, especially rhythmic As a result or by means of aperiodic vibrations, changes in the location of the welding aid perform that can be controlled and directed, becoming possible both polar as well as apolar synthetic resin, finally both types together by means of Implementation of the procedures mentioned in each case at the desired depot in which Form of wandering and subsequently to be stabilized resting positions in relation to the To be able to bring absorption material and its layers, depending on your choice. That will too on the basis of an exemplary embodiment to be described below in detail be illustrative. Through appropriate associations of the listed measures it will easily be possible to fully cover the range of variation mentioned above, which corresponds to the multitude of existing tasks, every problem that occurs to be able to lead to the practical solution.

By carrying out these processes, previously unknown ones arise Substances that are characterized by the fact that the absorption- and thus composite occurring weld fasteners in the distribution and the order in which the synthetic resin used to form these elements occurs was present before treatment in the RF field, and that in the direction perpendicular to on this surface the welded connection elements are in the same order taking into account any profiling carried out during the procedure involved substances is the same or is essentially the same in the order in the particles different dielectric behavior in the HF field with the admission resp.

Composite came into contact. That is very important This is because the composite material can be implemented in the through construction according to its structure becomes, the foreseeable future after with security> guaranteeing recording Stresses to be found as optimal is to implement the proposed facilities mr Processes are preferably characterized by the arrangement of at least two in the direction of movement of an absorbent for synthetic resin in relation to one another under the action of a RF field with different dielectric behavior of successive machine stations each with a movable conveyor that appropriately distributes or pre-arranges the resin Transmission surface.

At least one of the machine stations expediently has vibration and / or devices for exerting deformation forces on the absorbent material, through which he hawks, stretch, compress, bend, twist, twist, To be exposed to underpressure and / or overpressure or to be influenced in some other way in such a way that he receives the state in which he can best be used to exercise the functions that he should receive according to the chosen working method. That also includes Repetitions, switching on pauses, covering and superimposing different ones Effects on the recording and the composite material in the frame in which it is only becomes possible after the absorption material has been combined with other layers of material that to achieve the required overall effect. The proposed training of the facility has the advantage that the required synthetic resin is available at one station stands without the risk to be accepted that as a result of the difficulties to remove the last particle residues from pipes, containers, collecting funnels, Engravings, corner and angular spaces the possibility arises that a synthetic resin type in absorbent and / or composite materials is set in areas that lead to the solution certain tasks are extremely unsuitable. In addition, by arranging at least two Machine stations are reached that further stations at the point in time currently only later becoming Bodürinisse in the already ordering station streets can be switched on; the degree of freedom increases with each individual station to accommodate additions, extensions and / or changes to existing stations.

For example, possible embodiments of the invention that may be considered have been shown in drawings without claiming that they do Ability to comprehend the essence of the invention only approximately exhaustively. The drawing shows in: FIG. 1 the highly schematic and enlarged cross section by means of the aforementioned methods and the means shown in FIG. 3 Manufactured workpiece in the form of a screen, as used in automotive manufacturing technology needed in large numbers to be placed in the clear space of a motor vehicle door and to be able to be determined, which extends to the inside of the body to the self external door closure, not shown, connects; Fig. 2 gives the top view # on the Aperture, seen from the body interior according to arrow II in Fig. 1 again, while 3 schematically illustrates a device for carrying out the method, by means of which the reference of the diaphragm according to FIG. 1 is generated.

Fig. 4 gives the detail IV of FIG. 1 with the representation of a compared to FIG. 1 modified embodiment again, while FIG shows modified execution option.

In Fig. 1, 1 is a for example as a fiber board with very smooth delimitation broad areas designated underlayment, which under the most extensive Elimination of all manual work, so practically only in the context of automatically operated Manufacturing such as assembly line, cycle processes as well # machine roads, tool-touched, is to be covered with a textile fabric 2. A workpiece 1 - 3 designed in this way is found e.g. use in the clothing of seats and benches in the interior of motor vehicles and aircraft, in the case of the exemplary embodiment for covering the body facing Cavity of a door, the outline of the Dürhohlraumes of FIG. 2 to be taken is.

In order to be able to fulfill the task at hand, the foam is like equipped follows.

The foam 2 is absorbent for welding aids in the form discrete, arbitrarily distributable, pre-, arranging or classifying particles as well as layers of predeterminable height or heights, including particle-bearing foils, as long as their impermeability to air, as in the case of cavity lining is disturbing, further from suspensions, diffusions, paste dots or layers en as well as any other welding aid carrier, think of, for example adjacent layers of fabric of worn inclusions, apply.

In any case, the present application example is characterized by that the welding aids used are different under the influence of an HF field exhibit dielectric behavior. This is due to the fact that the foam 2 rests once on the fiber board, which behaves passively in every HF field and accordingly does not enter into a strength connection with the foam of layer 2, if welding aids are not in the contact zone when the connection is made 1/2 would be present. The ones in the contact zone area 1/2, with thick ones. Black dots 5 indicated synthetic resins are polar and they exist in the example from ternary modified polyamides because their decidated wetting and clawing ability, based on the generally occurring contact zone area inner and unstructured smooth surfaces of the part 1 is large enough to a the Permanent connection withstanding stresses between the fiber layer 1 and the foam 2 to make, especially one Such a plate generally only has a surface finish on the beautiful side 11 has to be designated smooth surface, while the been exposed to a press cut Surfaces 12 and 13 are rough, so that according to FIG. 4, these rough surfaces with the Designation 12, 13 facing foam boundary surfaces 21 yet another Particle accumulation from synthetic resins 51 may have, which are generally called apolar are considered and which are in contrast to the polar synthetic resins, which according to the the previous explanation are shown with the thick black dots 5, have received a finer score for the purpose of emphasizing the difference. As already explained before, the apolar particles, which then develop with 51 are designated when they occur in connection with the polar particles 5 while they are designated as 52 when they occur alone in particle clusters, below the action of the H2 field generates a very large amount of heat energy, so that it consists of synthetic resins how PVC / PVA can exist because the heating effect of the synthetic resins 5 is high Wetting and clawing ability with the development of the impact energy the apolar resin remains. Only non-polar drifts into synthetic resin accumulations Particles 52, they are nevertheless under the action of the HB field and they are also in the immediate vicinity of the polar welding aids 5, so that they can easily be used alone for the reasons mentioned, such as from the textile contact zone areas 2/3 {0omld it succeeds in between the foam layer 2 and the textile cover material 3 the required connection strength to realize. However, with the same technical success, but with # discounted Reality of the procedure in the textile-facing areas of the foam 2 also only polar synthetic resins 5 are brought to the accumulation, as the further possibility is present, by means of the shape of the RF welding process applicable, even electrodes not illustrated the production of welds in zones 1/2 and 2/3 with the profiling in the form the decorative grooves 41, 42, 43, 44, etc. to connect, since finally the described Production processes without any need for manual intervention the fact that a prefabricated plate 1 by means of an appropriate Mechanics inserted into the cavity of each prefabricated foam body 2, an end stop can be triggered and the HF field can be switched on. Therefore corresponds to the suggestion of the exemplary embodiment all technically and cost-wise given Requirements; 2 also shows that a recess 6 of the parts 1 - 3 the lock and the lock actuation can be pushed through the entire panel, while a simple Kreuzschliit 7 the implementation of the window crank hub itself enables.

Finally, FIG. 3 illustrates a device for processing of the new operating method, the two in the direction of the path of the absorbent 10 sequence set machine stations I and II. As absorbent material for one of its thickness exaggeratedly shown foam sheet available, to be able to illustrate the way, the layered synthetic resin in the foam should take. A cylindrically curved conveying surface 11 is provided for layering, which is structured and accordingly formed in the shape of a cylinder jacket Has surface with engravings 12, Sur receiving synthetic resins are used that if it occurs in the form of granular particles, each in a receiving, collecting and reservoir 13 is located. A cylinder jacket-shaped one runs at its mouth Conveyor surface 11 delivering drum over, in the direction opposite to Clockwise, with any synthetic resin excess due to the scraper 14 is removable. A rubber squeegee with a heavy iron core presses the particles into the engravings 12 or on their boundary surfaces. On the foam strand 10 are the readjustable, adjustable and lockable brake drums 16 with which conveyor and pull drums 17 correspond so that a between this # Rush lying foam area, depending on the settings mentioned above, more or is warped less. The strand 10 then passes through a suction box 18 and thereby bridges the free gap 19, the width of which is adjustable as a result, that it is determined by the front edges 23 of two steel sheets 24 attached to the inner Boundary surfaces of the suction box 18 are performed. You are under the influence of consoles 25, on which on the one hand adjusting spindles 26, on the other hand compression springs 27 attack, which provide the restoring forces. The entire suction box 18 is means further springs 27 sprung and is under the influence of rapidly rotating eccentric disks, the masses and amplitudes of movement are coordinated so that the Springs 28 vibrate in the resonance region. Open into the suction box 18 via flexible Lines or hoses suction and pressure connections 29, 30, so that resulting Negative and positive pressures are to be brought into effect on the foam via gap 19. All, individual or groups of these measures can be used to prevent particle accumulation to influence on the surface of the foam strand 10 as it is in the Machine station I of Figure 3 has been illustrated at 10, i.e. the particle flow 500 has a tendency towards the contact surface between the strand 10 and the suction box 18 to approach. If that leads to the risk of particles escaping from the strand threatens to lead, the suction box is switched over to the effect of a pressure box, wherein a diaphragm, not shown, comes into effect above the strand 10 to prevent particles from being blown out of the strand. That can be automated be.

In the same way as the machine station I of Fig. 3 the station II is designed with the difference that in this station the Absorption capacity of the foam strand 10 is used to give it a particle Synthetic resin to be able to supply it, its dielectric occurring in the IIF field Behavior is different than that of the synthetic resin that in station I of the absorbent was fed. The possibilities available in this respect are not exhausted in two Stations. The same applies to structures and engravings of the coating drums, which are also carried out by level, distributing and ordering devices are replaceable.

What is carried out in the context of the exemplary embodiments for the foam strand applies analogously to any other material such as fleece, sliver, pile tape, Cotton swabs, nonwoven fabrics or such as preferably textile-structured fabrics, Knitted fabrics, braids, etc. Synthetic resin powder, powder and / or grain particles, the latter containing suspensions, diffusions, pastes and paste dots able to absorb, as far as it is not about fibers, or pieces of fiber or otherwise molded synthetic resin particles.

The device of Fig. 3 makes it clear that with their help any required synthetic resin distribution, order and arrangement can be implemented. Recognizable is first of all an area 40 over which a distribution of particles extends, as a result of mutual, preferably coincident or approximate equal distances separated, i.e. discrete particles or collections from these occur when they circulate the conveying surface q r mouth of the collecting container 13 had filled up and filled in the niches that gave rise to the engraving areas owe that against the cylindrical drum circumference radially to the drum rotation axis set back or increased. It depends on the design of the engraving on the one hand, on the grain size and shape of the particles on the other hand, whether the foam strand 10 only individually pre-arranged and accordingly arranged on its upper boundary surface distributed particles continues or the particle depots less or more in terms of area appear broadened. Both influencing variables are controllable and accordingly adjustable. Since it can still be assumed for the area that during its Generation of warping of the foam strand with the aid of the devices 16, 17 realized and / or the vibration device on the box 18 switched on and / or above an appropriately adjusted slot 19 the effect of the Box 18 was guaranteed as a suction box, it comes to training in the area 40 an increase in the number of particles in the vicinity of the lower boundary surface of the Foam layer 10.

The small size of the resin particles present in area 40 indicates that these are apolar synthetic resins with a very large loss angle, accordingly high heat development in the HF field, but less wetting and clawing capacity acts. The machine station II is accordingly used to apply non-polar particles used, whereby it is a matter of determining the lengths of the areas 40, 41, 42, 43, etc. is to prepare line 10 according to the given working and usage conditions, that according to their dielectric behavior in the HF field / according to their further properties correctly selected types of synthetic resin occur in each case at the points of the foam sheet and that the foam web is deformed at these locations so that the web areas in the HF field meet the application and working conditions, which is also the case for format cuts is applicable. Likewise, the devices 16, 17, the vibrators 25-27, the lines 29, 30 associated suction and compressed air valves so manageable that it is in each of the Sections 40 - 43 etc. come to the particle distribution, with the help of which it is possible is to perform the tasks that arise.

What afterwards for the entire thickness range of the foam strand 10 is achievable, also applies to subdivisions of this strand into individual layers, about 30 and 31 according to Figure 5 of the drawing, whereby a contact zone 30/31 can be seen in which the particle accumulations 51 have different dielectric behavior their components 5 and 52 under the influence of the RF field in direct mixing contact occur and take effect by the particles 52 in the RF field providing the primary heat suppliers and the secondary heat generated by the particles 5 to the heat of fusion climb up.

Manufactured using the method shown and in one RF field treated recording or composite materials are characterized by the fact that in them occurring welded connection elements sorted, in particular in the order occur, whichever synthetic resins are used to form the welded joint treatment in the XF field and that in the direction perpendicular to the distribution surface or to the distribution areas in which this order occurs or in which these orders occur is the same as that which takes into account any, Profiling of the substances involved or

Layers of fabric, is the same or is essentially the same in the order which the synthetic resins in the RF field different dielectric behavior before Had formation of the welding elements.

It is in the essence of the invention that it should not be drawn from the drawing illustrated and described embodiments exhausted. This is also true for the characterization of the invention par excellence. For example, if from the occurrence There has been talk of synthetic resins in particle form as they stand out due to the need for fragmentation larger solid accumulations of synthetic resins obtained, for example by stone crushers and Mills results, then that does not, as already mentioned, shoot out the particles amorphous, crystalline, pasty, which are carried in them, if necessary enclosing them and / or bringing in liquid substances and taking them up, provided that the prerequisites are met it is sufficient that the states or changes of state that occur as a result nothing in the behavior of the synthetic resins or nothing essential in them changes that cause and the purpose of using synthetic resins in accordance with the invention as in the RF field is dielectrically differentiated welding aids.

Claims (17)

Claims 1. A method for producing high-frequency weldable Synthetic resins, preferably in particle form, absorbing substances such as webs, cut pieces, Films and bodies and / or using these receptive substances for production of composites that do not indicate that synthetic resins are in the Relationship between different dielectric behavior in the HF field, preferably both polar and at least practically non-polar synthetic resins in or be brought to the material for inclusion. 2. The method according to claim 1, d a d u r c h k e k e n n -z e i c Not that the synthetic resins have different dielectric behavior separately be brought from each other for recording. 3. The method according to any one of claims 1-2, d a d u r c h g e k It is noted that selected synthetic resins in some areas of the absorption substance preferably in layers of the same 1 to be taken up. 4. The method according to claim 3, d a d u r c h g e k e n n z e i c # n e t that layer layers themselves or in connection with other substances of the action of the HF field. 5. The method according to any one of claims 3 - 4, d a d u r c h g e k e n n n z e i n e t that layer layers are combined to form a composite material, if necessary. in connection with other substances. 6. The method according to any one of claims 1-5, d a d u r c h g e -k Noted that selected synthetic resins change the shape of the absorbent material such as warping the same, flexing, vibrating, or periodic oscillation excitation aperiodisok exercise of pressure, tension, bending, notch, shear and / or other increases Forces and stresses, application of under- resp. Overpressure, mechanical, pneumatic, hydraulic, magnetic, electrical, electrostatic and / or # dynamic as well as electronic influences in or on the absorbent material, depending on the boundary surface or volume, in certain areas or localized in a volume-distributed manner 7. Procedure after a of claims 1 - 6, d u r c h g e n n n z e i c h n e t that selected Resin particles are brought into at least one foam layer for inclusion. 8. The method according to any one of claims 1-7, d a d u r c h g e k e It is not noted that selected synthetic resin particles in a fleece, in a Wadding, cellulose, spun bo-nd, non-woven, or in any other, the particles yielding and they can be accommodated in the surrounding layer. 9. The method according to any one of claims 1 - 8, dadu r c h e kUS e deei it is clear that the selected synthetic resin particles in woven, knitted, knitted, braided or otherwise textile-structured layers of fabric are brought to the inclusion, for example with the help of a thermosetting process. 10. The method according to any one of claims 1-9, d a d u r c h g e k It is noted that the boundary surface of a foam layer, which is in a composite material to be produced for contact with a surface or layer of material without Bringing absorption capacity for selected particles would be prior to the production of the System flame-laminated and only in the sticky state created by it Areas or layer is created. 11. The method according to any one of claims 1 - 10, d a d u r c h g e k It is noted that selected resin particles that are attached to one do not the directly absorbing surface or layer or a substance of this type are, by means of applying or laying on, pressing on or in or pressing on, pressing, On or on vapor deposition, on, on and / or on dusting, on or on gluing, on or Laying on dissolved foils made of cold Ifld / od # rHot glue, by means of cathodic Atomization, fritting or fritting and / or using hot-seal-like ones Processes on surface, layer, material and then the action of the handler - subject to the field. 12. Manufactured by the method of any one of claims 1-11 Recording or composite material, d u r c h g e k e n n n z e i c h n e t'daß in them occurring weld connection elements in an orderly manner, in particular occur in the orderly distribution which are responsible for the formation of the welded joints used synthetic resins in the HF field due to the different dielectric behavior Treatment under his influence before welding, and that they were in the Direction perpendicular to the distribution surface or to the distribution surfaces a sequence that they have to take into account any precautions to be taken during the procedure Profiles of a layer of fabric or the layers of fabric possessed, the same or substantially is the same as the sequence that prevailed before the treatment in the IB field. 13. Recording or composite according to claim 12, d a -d u r c h g It is not noted that there are welding elements in these The distribution of the area corresponds to the distribution completely or approximately, the engravings located in a structured conveying surface for receiving, conveying and delivering the particles to the absorbent. 14. Device for carrying out a method according to one of the claims 1 - 11, it is indicated that they have at least two machine stations (I, Ii), which in the direction of the conveying movement of a receiving fabric for under the action of an H # field exhibiting different dielectric behavior Synthetic resin particles (21, 22) successively, and in which conveyor and distribution means for the particles are present, which are necessary for their orderly accommodation in the engravings (12) a moving conveying surface (11) which rests on the absorbent material (10) and which Particles thereby form-fitting. transfer him, lead him. 15. Device according to claim 14, d a d u r c h g e -k e n n z e i c h n e t that at least one of the stations devices (16, 17) for generating of changes in shape of the absorbent material (10). 16. Device according to one of claims 14-15, d a -d u r c h g It is noted that at least one of the stations has devices (19; 23-28) for generating vibrations of the absorbent material (10). 17. Device according to one of claims 14-16, d a d u r c h gek It is noted that at least one of the stations has devices (29, 30) to generate negative or positive pressures acting on the absorbent material (10).