DE102007021651A1 - Multilayered sun protection- and/or solar absorbing composite film for selective filtration of sun radiation from thermoplastic, comprises reinforcement material connected to area to be charged or processed for partial stabilization - Google Patents

Abstract

The multilayered sun protection- and/or solar absorbing composite film (10) for selective filtration of sun radiation from thermoplastic, comprises a reinforcement material (20) connected to area to be charged or processed for partial stabilization in a positive material fit, and a structure formed on the outer surface of the reinforcement material, where the surface is turned to the film. A connection between the film and the reinforcement material is produced by ultrasonic welding process in a positive material fit. The exterior structure consists of closed and/or open geometry. The multilayered sun protection- and/or solar absorbing composite film (10) for selective filtration of sun radiation from thermoplastic, comprises a reinforcement material (20) connected to area to be charged or processed for partial stabilization in a positive material fit, and a structure formed on the outer surface of the reinforcement material, where the surface is turned to the film. A connection between the film and the reinforcement material is produced by ultrasonic welding process in a positive material fit. The exterior structure consists of closed and/or open geometry. The structure is adapted to prefixing for a joining process or for transport of a fabric to be fixed at the structure of the fabric and/or the seam formation. The film is stabilized on a surface by the reinforcement material or longitudinal side edges (21, 22) with the reinforcement material in single or double-sided manner. The side edge reinforcement material has a breadth of 5-30 mm. A layer of the multilayered film is biaxially aligned. The reinforcement material has 65% of the thermoplastic plastic portion/fiber portion of the respective material at the surface of the film, and consists of a plastic non-woven Independent claims are included for: (1) a method for finishing a multilayered sun protection- and/or solar absorbing composite film; and (2) a device for finishing a multilayered sun protection- and/or solar absorbing composite film.

Description

The The present invention relates to a film, in particular multilayer sunscreen or sun-screen composite film for selective filtration of sun rays, of thermoplastic material according to the generic term of claim 1 and to a method and apparatus for Equipping a film, in particular multilayer sunscreen or solar composite foil for the selective filtration of solar radiation, made of thermoplastic material according to the preamble of the claim 15 or the claim 28th

The Foil is used for medical, cosmetic and / or dermatological use Use in humans as a preventive sunscreen for Skin, hair and eyes, for targeted gentle health improvement and targeted medical use of form of photo and heliotherapies and, depending on the form, has the task wholly or partly z. B. Risk reduction of sun exposure with the short-term Consequences, z. B.: Erythema, allergic or heat reaction and / or medium and long term consequences such as skin cancer, skin aging, etc. and / or to avoid, start, promote or reduction of photobiological and photochemical processes or wavelength-controlled biological or energetic Processes - such as B. the metabolism or endocrine and neurological system or optical irritation or "cosmetic" Change. The film is also suitable for use in the plant and animal world and in various further - also technical areas where an appropriate application the film advantages before or by optical rays promises (such Protection of objects from photo-aging). The foil can In this case, other primary functions such. B. weather, Take over visual and splinter protection. People, Animals, Plants, etc., which use this film can their Environment without significant impairment - depending on Tint and minimal structure - crystal clear to light perceive cloudy. The film is characterized by filtration in that they belong to the absolute, selective and / or relative Protection and / or use with or without transformation of certain optical Rays is used and / or by reflection z. As the infrared radiation Thermal radiation reduced to the user.

Especially The foil can be used in awnings, tents, umbrellas, tarpaulins, awnings, canopies with high environmental compatibility during use and disposal and with high recyclability cost be used.

Prefers is a composite foil which has a multilayer structure, wherein at least one layer is a biaxially oriented film. At least through a layer is the primary filtration, which by Further functionalizations are optimized and supplemented. Absolute filtering, d. H. almost completely filter the slides the optical beams with a wavelength up to 305 nm. Depending on the requirement, this absolute filtration ranges between 305 to 390 nm in a selective wavelength-specific narrow band filtration in the form of a flattened filtration edge, the wavelength-specific "Filtration edge" over. Depending on the request then takes a further relative filtration going into the areas of the VIS and the IR. This relative filtration can, for. B. almost constant, the IR increasingly z. B. to reduce the IR heat radiation by means of metallization, filter individual wavelength ranges reinforced (eg color light therapy, coloring) or individual wavelength ranges amplify by absorbing shortwave light and in longer-wavelength light is emitted. Depending on the application may be a further fine-tuning of the filtration and / or adjustment to the other requirements by introducing further substances, such as As pigments, particles, additives, by combination with others Materials, such. As PET, PC, PP, PE, EVA, PMMA, tissue or else Glass and prints of all kinds, done.

The Primary filtration is by means of modified polymers, preferably from thermoplastics and their derivatives and Copolymers, preferably from the family of the polyester in particular the PET or PC, the family of polyacrylic, the family of polyolefin in particular, the PP, PE, EVA of the polyamide family, the family of the polyurethane, the family of polyvinyl chloride, wherein the primary filtration in addition to the orientation of the polymers, the manufacturing process, the addition of other substances and the film thickness are defined can.

Because of the mechanical properties of a film composite is preferred from thermoplastics and their derivatives and copolymers preferably from the family of the polyester, in particular the PET or PC, polyacrylic family, polyolefin family in particular PP, PE, EVA family of polyamide, polyurethane family, the family of polyvinyl chloride, wherein i. d. R. this Films are also stretched.

It is the state of the art, the skin, the eyes and the hair of man against the dangers of solar radiation, especially those of To protect sunburn.

The WO 2004/090589 A1 describes such a film, which is suitable, the dilemma of the positive and negative effects of optical rays to solve man.

at Films for sun protection or for sun use are in usually a composite of technical films with different physical, chemical and thermal properties, which Slides in the composite for this purpose specific properties (Filtration, price, weight, production of the composite, insensitive against influences of weather and use, food law Safety, ...). Regarding the processing ability for connections with other materials (example: sewing connection with tissue), these films are only partially suitable. By orientation the film, i. d. R. biaxially, these films have a low tear propagation resistance. This property is used z. For example, to open a simple and defined a foil package by means of an opening aid, z. As edge or perforation to allow. This attribute however, is undesirable in the use described herein. Potential injuries (knives, sharp edges), which are especially when in use by the edge areas or in further processing / connection with other materials z. B. caused by perforations during sewing, can be do not prevent. So it is necessary in some applications Edge areas or other critical areas due to trimming too Protect, thus preventing a tearing and tearing or especially to stabilize those areas in which a Attachment or connection with other materials, eg. B. by Sewing is desired or necessary.

Naturally subject Foils at heat input a shrinking process, which the temperature as well as the duration of the heat input is dependent and to a loss of dimensional accuracy and in the area of heat input to a reduction transparency and optical interference due to waviness leads. The shrinkage behavior is i. d. R. different in the longitudinal and transverse direction, depending on the thermoplastic Plastics and the composition of the individual layers of the Composite film - which alternately through the arrangement can influence the degree of orientation - the manufacturing process of the individual layers and the composite film (eg lamination) as well as possible after-treatments such as Heat stabilization and heat treatment. The slides have a shrinkage of up to 5%. Related to the applications From these slides is a more accurate dimensional accuracy as well Avoidance of optical changes necessary. shrink can not be completely prevented, but only by a suitable mutual balance in reduce the arrangement of the different degrees of orientation. Costly post-treatments are also expensive and not only bring a reduction in strength but i. d. R. optical disadvantages.

applications In addition, the requirement for partial uptake of high mechanical, static and dynamic loads, which the other weather and application influences despite Withstand lightweight construction, so that the films are assembled and at the affected areas by elastic and / or inelastic Material must be stabilized.

The smooth surface, lack of elasticity and the high puncture resistance of the films lead In addition, no reliable results. The reason for this is a non-constant thread tension because of lack of elasticity, which is especially at later dynamic and weather-related stress noticeable, the lack of prefixing and the poor transport (upper as well as sub-transport) through the smooth surface, whereby the sewing speeds significantly reduced and provisions for draft-free feeding of the materials must be taken to the interface.

Of the Invention is based on the object, a suitable stabilization which are common to those in the textile industry Tuned procedures and production accuracies and speeds and the purpose-defining properties of the slides are not adversely affect.

to Solution to this problem are in a film or a method and means for providing such a film in the claim 1 and the features specified in claim 15 and 28 features intended.

It has been found to be a material bond a reinforcing material with the surface the film by ultrasonic welding the best method is to realize a partial stabilization without that Here, the inhomogeneous film composite or the compounds of the individual Layers is destroyed or damaged and where at a further processing no further requirements such. B. Needle cooling, prevention of resinification, time delay through Curing, ... are made. The ultrasonic welding is also the most cost effective, environmentally friendly and suitable for mass production and fulfilled at Material compositions continue to meet the criteria of an unrestricted Food safety of the slides (eg after Directive 80/128 EEC, the German BgVV and / or the American FDA for the Approval as packaging of food of all kinds).

Also taking into account the Schrump Depending on the ultrasound process and structure of the weld pattern and properties of the reinforcing material, which must contain at least 65% of the identical thermoplastic resin content / fiber content, as prevails on the surface of the films shrinking of the machined portion of 0.5 to 3% , The best results are achieved with a 100% agreement in the composition of the thermoplastic material.

When welding or welding on the reinforcing material is on the film in the form of thin nonwoven fabrics (spunbond or staple nonwovens - preferably thermally bonded and compacted continuous filaments) material of uniform material preferably made of polypropylene (preferred expression: spunbonded between 10-100 gr / m ² ) or Polypropylene films (preferred form non-oriented polypropylene (preferably produced by blow or cast method between 40-100 μm) by means of a continuous or discontinuous ultrasonic method with defined energy input (amplitude, frequency, pressure, welding time, holding-down time and welding surface) and with a defined structure on anvil or sonotrode (for material application, creation of a defined surface structure and a partial change in the physical properties of the filter film) partially apply, without the physical, chemical and thermal properties of nicht stabilis change the surfaces.

By the melting / plasticizing of the material have the polymers the film in addition to the general shrinkage the tendency to break down the restoring force introduced by the orientation / stretching contribute and partially rearrange the polymers, where at the same time imposed a new structure by the geometric structure so that new mechanical properties in this partial Area as well as partial shrinkage arise. In this area are therefore only partially the original features exist where z. B. the loss of strength by the strength gain of welded plasticized material is compensated.

The Width of the reinforcement / enclosure preferably has one Width from 5 to 30 mm. Preference is given to ultrasound with the frequency used from 20 to 50 kHz.

to Improvement of the welding pattern, solidification and degradation the welding-related temperatures will - depending on Quality requirements - especially with the continuous Procedure of spot weld / area immediately a hold-down device downstream.

The Surface structure of the anvil or sonotrode can open and closed geometries - consisting of points, diamonds, Chopsticks or the like - exist, wherein Care should be taken that no sharp transitions are chosen and that the edges are broken, as these become voltage peaks being able to lead. Particularly advantageous are diamonds resulting hatchings in terms of tear strength, where the stitch length and the needle thickness are chosen it should be that no more than one puncture takes place per rhombus and the needle thickness is not more than half the diagonal the rhombus is in the direction of the seam.

Regarding Shrinkage is interrupted structures specially formed advantageous. Regarding the further processing are particularly at the use of films as a stabilizing material rippled Structures that have a high resistance and in the it is best to penetrate tissues that are to be sutured suitable. The reinforcing material immediately becomes the welding surface supplied by means of a feeding aid.

With The thus stabilized surfaces can be any Materials with the common procedures of the textile industry be reliably connected.

With the above method resulted for the so equipped or made-up film, a shrinkage of 0.5 to 1.5%, which however, for some applications or for an effective one Making applications from the film is not optimal.

In Another expression is the ultrasonic welding avoid shrinkage or reduce further.

The Causes of shrinkage are on the one hand in the shrinkage behavior the film and the stabilizing material as well as in the ultrasonic welding process with the shape, size and duration of the energy input. The lower, faster and more accurate the energy input exactly the surface of the film is done, the faster it is Energy input degraded and the lower the shrinkage, but also the strength of the joint connection.

A essential variable for an effective energy input and for fast plasticizing also provided the damping behavior of the reinforcing material, a reduction in shrinkage tendency before welding - also by anticipated Shrink -, a draft-free feeder and a previous heating to reduce the differential temperature to the ultrasonic welding temperature of the stabilizing agent to be applied Material dar. In a special form of the process For this purpose, the reinforcing material between 50 ° and 160 ° C. heated.

A Partial heating of the film is with regard to the exact Heat input only very gently and possibly under bias to anticipate shrinkage and expensive. experience have shown that partial heating of the film up to 140 ° C under prestress with very good results a the ultrasonic welding process downstream cooling resulting in rapid temperature reduction.

• a) Durch Wärmebehandlung des Verstärkungsmaterial beim/vor dem Schweißen und zugentlastete Zuführung.
• b) Durch partielle Wärmebehandlung der Folie beim/vor dem Schweißen.
• c) Durch Reckung/Verspannen der Folie beim Schweißen/Schweißprozess.
• d) Durch dem Schweißen nachgeschaltete Kühleinheit (Kühlwalze oder Kühlstempel).
• e) Durch Kombination von Wärmebehandlung und/oder Recken und/oder Kühlen.
• f) Die Wärmebehandlung, die Kühleinheit, die Vorspannung kann durch Regelglieder gesteuert und mit der Steuerung des Ultraschallprozesses vernetzt werden.
• g) Der Schweißeinheit kann direkt nachgestellt eine Näheinheit folgen.
• h) Die vorgenannten Maßnahmen sind für alle Ultraschall-Schweißverfahren einsetzbar, unabhängig ob das Ultraschall-Schweißverfahren kontinuierlich, diskontinuierlich getaktet oder eine Kombination daraus ist; die Vorrichtungen müssen lediglich hinsichtlich der Taktzeiten, Schweißlängen als Rollen oder Stempel oder Kombination aus Rollen und Stempel ausgeführt werden.
• i) Der Temperatureintrag bzw. Temperaturreduktion kann direkt Wärme-/Kühlfläche-/-walze oder berührungslos über eine z. B. über IR-Strahlung oder Warmluft/Kühlluft erfolgen.

In a further embodiment of this preferred method, the affected area to be stabilized is therefore defined before the ultrasonic welding process for reducing shrinkage stresses and preventing the restoring behavior and for "energy-reduced" and consistently gentle ultrasonic welding, wherein the applied material or even to be stabilized During the ultrasonic welding process foil can be under prestressing (stretching) and the materials to be joined are stored under defined climatic conditions. This can be done as follows:

• a) By heat treatment of the reinforcing material during / before welding and strain-relieved feed.
• b) By partial heat treatment of the film during / before welding.
• c) By stretching / bracing the film during the welding / welding process.
• d) Cooling unit downstream of welding (chill roll or cold stamp).
• e) By combination of heat treatment and / or stretching and / or cooling.
• f) The heat treatment, the cooling unit, the bias can be controlled by regulators and networked with the control of the ultrasonic process.
• g) The welding unit can be followed directly by a sewing unit.
• h) The aforementioned measures can be used for all ultrasonic welding processes, regardless of whether the ultrasonic welding process is continuous, intermittently clocked or a combination thereof; the devices need only be designed in terms of cycle times, welding lengths as rolls or punches, or combinations of rolls and punches.
• i) The temperature entry or temperature reduction can directly heat / cooling surface - / - roller or contact over a z. B. via IR radiation or hot air / cooling air.

By a process-related heating of various components during the processing process is for certain qualities necessary that these temperature fluctuations on the individual components recorded and regulated by appropriate control units locally or their effect will be corrected.

In a simplified version can by shrinking changed dimensional accuracy also by consideration the shrinkage during cutting can be improved. This has however in series production the disadvantage that no straight blanks can be made and light geometric optically visible Waves appear, which in some applications with the film are acceptable.

Further Details of the invention can be taken from the following description, in the invention with reference to the embodiments illustrated in the drawings is described and explained in detail.

1 a composite film partially reinforced according to the invention on two opposite side edges in plan view,

2 a section along the line II-II of 1 to illustrate a known composite film,

3 a composite film partially reinforced according to the invention on four side edges in plan view,

4 in an enlarged view a section according to circle IV of 3 .

5 in a perspective broken view of a side edge partially and on both sides reinforced composite film according to an embodiment of the present invention,

6 one of the 5 corresponding representation, but with a partial and double-sided amplification according to another embodiment of the present invention,

7 in a perspective broken view of a partially and unilaterally executed reinforcement at an inner region of the composite film according to a further embodiment of the present invention,

8th in plan view, various embodiments of the geometric structure on the outer surface of the reinforcing material,

9 a schematic plan view of a rectangular cut composite film after its edge stabilization,

10 one of the 9 Corresponding illustration, but with a precut take into account of shrinking cut composite film,

11 in a schematic perspective view of a device for equipping or Assembling the composite foil with a reinforcing material in a continuous ultrasonic welding process,

12 a schematic perspective view of a device for equipping the compound film with a reinforcing material in a discontinuous ultrasonic welding process,

13 in a schematic side view of a system with a device according to 11 for continuously equipping a composite film with a reinforcing material,

14A and 14B a schematic side view of a device for biasing or pre-stretching the composite foil to be welded and the reinforcing material during a discontinuous ultrasonic welding process according to a first embodiment and

15A and 15B one of the 14A respectively. 14B corresponding representation of a device for biasing or pre-stretching of the composite film to be welded and the reinforcing material in a discontinuous ultrasonic welding process according to a second embodiment.

The film used in the partial film stabilization according to the invention is for example one of the WO 2004/090589 A1 known multilayer composite film for sun protection or for solar use for the selective filtration of solar radiation, wherein the composite film 10 made of thermoplastic material. According to 2 owns the composite foil 10 a preferably biaxially oriented base film 11 , on both sides of a cover sheet or carrier layer 12 is covered. For example, the lower cover sheet 2.12 over an adhesive layer 2.13 directly with the relevant surface of the base film 11 firmly attached while the top cover sheet 1.12 over an adhesive layer 1.13 with a metallization surface 14 on the relevant page of the base film 11 is firmly connected. Such a composite foil 10 has neither sufficient tear strength nor sufficient tear resistance. Furthermore, such composite films 10 made of thermoplastic material on both sides very smooth and have a high puncture resistance to sewing needles or the like because of their relative rigidity, so that it is difficult to such composite films 10 to further process or incorporate into a sunscreen or sunscreen product.

In accordance with the invention, therefore, the composite film 10 , as reflected in the 1 and 3 With 4 in a schematic manner, partially, for example, side edge side with a reinforcing material 20 Mistake. The reinforcing material 20 consists of a polyester or of a polypropylene, preferably a non-oriented polyester or a non-oriented polypropylene. For example, the reinforcing material arises 20 as a plastic fleece, which is made of polyester fibers or preferably made of polypropylene fibers or constructed. The reinforcing material 20 is in still darzustellender way by ultrasonic welding with surfaces to be selected or areas of the composite film 10 applied on one side or on both sides cohesively connected.

According to 1 is the reinforcing material 20 at the two transverse edges 21 and 22 a substantially approximately oblong rectangular composite film 10 cohesively applied. Opposite that 3 a roughly square cut composite film 10 in which all four margin areas 23 to 26 with the reinforcing material 20 are provided. It is understood that the blank of the composite film 10 others, such as triangular, circular, polygonal u. Like., Bases may own.

4 shows an enlarged view of the arrangement of the reinforcing material 20 in a width of, for example, between 5 mm and 30 mm along the respective edge region, about 9/10 of the width of the reinforcing material 20 with the composite foil 10 cohesively connected, while 1/10 of the width with the composite film 10 remains unconnected and this unconnected strip 27 is seen from the edge of the side edge of the inside.

The stabilization of certain areas of the composite film 10 serving partial equipment or packaging along one or more side edges 21 to 26 composite film 10 after the 1 and 3 can according to the 5 and 6 be done in two ways, in both cases, the side edges on both sides with the reinforcing material 20 are occupied.

It shows 5 a stabilization of the side edge 21 in that the reinforcing material 20 around the front edge 28 of the margin 21 is laid.

6 shows an embodiment in which the end edge 28 remains free as the reinforcing material 20 from both faces of the margin area 21 the composite foil 10 is applied by ultrasonic welding. Thus, the reinforcing material 20 by two separate stabilization layers 31 and 32 shown.

7 shows an embodiment in which the reinforcing material 20 on one side on an arbitrary inner, ie a side edge facing away surface area of the composite film 10 is applied. This area can be anywhere on the composite film 10 arranged according to their stress and / or connection with other materials and be stabilized on one side or on both sides.

From the 5 to 7 the commonality arises that by the ultrasonic welding of the reinforcing material 20 on the relevant surface area of the composite film 10 a plasticization 30 of the relevant area of the surface 18 and or 19 the composite foil 10 and the reinforcing material 20 results. These plastifications 30 cause the cohesive connection of reinforcing material 20 and composite foil 10 and may be punctiform or linear, which is dependent on the design of the ultrasonic welding elements. Furthermore, it follows from the representations of all the above figures (except 2 ) that the reinforcing material 20 with the cohesive application to the composite film 10 with a surface structure 35 is provided.

The surface structure 35 can according to the representations 1 to 8 of 8th be configured in a variety of ways, the illustrated embodiments of the surface structure 35 are given by the surface configuration of sonotrode and / or anvil of the ultrasonic welding device used. Open (interrupted) and closed (uninterrupted) structural geometries are shown, of which the open or interrupted formed structures (representations 3, 4, 6, 8 of FIG 8th ) with respect to shrinkage of the reinforcing material 10 are advantageous, while the closed or continuous structures, such as hatching o. The like. According to the representations 1 and 2 or 5 and 7 of 8th are advantageous in terms of tear strength. The further advantage of these structures 35 consists in the optimal Weiterverarbeitbarkeit or connectivity with other materials (such as fabrics or elements) due to the increased resistance or friction coefficient, for example, when sewing with fabric or the like elements.

9 shows a rectangular cut straight composite film 10 in double-dashed line before or in solid lines after stabilization by the ultrasonic welding with the reinforcing material 20 and after shrinking the composite film 10 , where there is a crimp on the edge 36 comes. To 10 On the other hand, the shrinkage of the composite film 10 In the case of ultrasound, this is taken into account in advance in that the composite foil 10 is cut convex or concave (double-dashed line), so that after the stabilization (in solid lines) by the ultrasonic welding with the reinforcing material 20 the curling area 36 less fails.

11 shows a device 40 for continuous ultrasonic welding of the reinforcing material 20 , here on both sides along a side edge 21 , on the composite film 10 in one embodiment 5 , The device 40 has a wheel-shaped sonotrode 41 and a wheel-shaped anvil 42 between which the composite foil 10 and the reinforcing material 20 are arranged and carried out such that the band-like reinforcing material 20 over the margin 21 the composite foil 10 is turned down and up, which by means of a not shown in detail conical channel-like feeder 43 and one along the side edge 21 the composite foil 10 arranged stop 44 he follows. It can be seen that sonotrode 41 and anvil wheel 42 in opposite directions (V1 or V2) are driven - or one of the wheels is free-running and indirectly through the counter-rotating wheel with the material - and with their cylinder jacket-shaped contact surfaces by a force F1 or F2 against which to the composite film 10 beating reinforcing material 20 are pressed. On the one hand, the punctiform or linear plasticization takes place for the positive connection between the composite foil 10 and the reinforcing material 20 and on the other hand the imprint of the structure in question 35 (here according to the representation 1 in 8th ) on the respective outer surface of the reinforcing material 20 due to the circumferential surface structure 45 from sonotrodes 41 and anvil wheel 42 ,

An institution 50 for discontinuous ultrasonic welding or producing the ultrasonic welding connection between composite foil 10 and reinforcing material 20 in one embodiment 6 owns according to paragraph 12 a sonotrode 51 and an anvil 52 which have a rectangular contact surface (for example, for all possible three-dimensional surfaces) with a corresponding surface structure and on an upper or lower layer 31 . 32 made of reinforcing material 20 for connection with the composite foil 10 to press. Feeding the composite foil 10 with previously applied reinforcing material layers takes place in the direction of arrow A, wherein the ultrasonic welding connection in sections by mutually moving Sonotrode 51 and anvil 52 takes place by means of a force F1 or F2. An attack 54 allows a guide along the edge region to be stabilized 21 ,

13 shows a plant 60 for the continuous production of an ultrasonic welded joint of composite foil 10 and reinforcing material 20 either along the edge or on any other areas of the composite film 10 , The attachment 60 has a sonotrode wheel 61 and anvil wheel 62 with certain energy supply, process-related temperatures T1, T2, certain contact pressure F1 and rotation speed V1 (similar 11 ) as well as a device 65 for pre-stretching the composite film 10 , which is a unit of upper and lower tension roller 66 . 67 and a unit of upper and lower brake rollers 68 . 69 , in each case specific contact pressure F3, F4 or F5, F6, and rotational speed V3, V4 or V5, V6 and temperature T3, T4 for cooling and solidifying the welded connection or T5, T6 for heating the composite film 10 form. Thus, the draw rollers 66 . 67 also solidify and cool the ultrasound image and the brake rollers 68 . 69 the composite foil 10 heat.

For the reinforcing material 20 is a cone-shaped feed unit 71 provided that the reinforcing material 20 optimally folds, heats and measures at T8. A preferably provided transport unit 72 serves to tension and tension-free feeding of the reinforcing material 20 to the feed unit 71 , The reinforcing material 20 gets from a roll 74 subtracted and also from a control and test unit 76 supervised. It is also possible to use the reinforcing material 20 in the form of cut pieces. The composite foil 10 for example, directly from a roll 78 subtracted and by a control and test unit 79 supervised. Optionally, a temperature monitoring unit 80 upstream of the ultrasonic welding process. After the ultrasonic welding process, the with the reinforcing material 20 provided composite film 10 after checking and monitoring by means of a unit 81 on a roll 82 rolled up or by an automatic cutting unit 83 cut or by a turning unit after automatically cutting off the reinforcing material 20 and the supernatant on the nearest surface further reinforced.

14 shows a discontinuous ultrasonic welding method in combination with a pre-stretching of the composite film to be welded 10 and reinforcing material 20 consisting of a sonotrode 91 with cooling unit, an anvil 92 with rounded edge, left and right each one hold-down 93 and 94 with counterhold 95 and 96 , In position I, the supplied reinforcing material 20 and the composite foil 10 by the force A between anvil 92 and sonotrode 91 fixed. Then the hold downs close 93 and 94 with the force B. In position II, the units from hold-down now lower 93 and 94 as well as the counterholder 95 respectively. 96 around the path C, creating the slightly prefixed composite foil 10 and the reinforcing material to be welded 20 over the rounded edges of the anvil 92 are pulled and thus the materials to be welded are biased to compensate for the expected shrinkage stresses. Then the actual ultrasonic welding process starts with the force F (D), the energy E (D) and the reaction time t (D). After ultrasonic welding, the sonotrode lingers 91 with the force F (E) and the residence time t (E) for hardening and cooling, optionally additionally a cooling element can be pivoted. After that drive the units 93 . 95 respectively. 94 . 96 back to position I and open in reverse order. Then it will continue to clock. Optionally, as in 13 described, a draft-free feed with heated reinforcing material 20 ,

15 shows a discontinuous ultrasonic welding method in combination with a pre-stretching of the composite film to be welded 10 and reinforcing material 20 , also consisting of a sonotrode 91 with cooling unit and an anvil 92 with a rounded edge as well as a hold-down on the left and right 93 ' and 94 ' with counterhold 95 ' and 96 ' , In position I, the supplied reinforcing material 20 and the composite foil 10 by the force A between anvil 92 and sonotrode 91 fixed. Then the hold downs close 93 ' and 94 ' with the force B. In position II now the units are from hold down 93 ' and 94 ' as well as the counterholder 95 ' and 96 ' in the direction of the material to be welded wegunabhängig tense with a defined force C to compensate for the expected shrinkage stresses, creating a tensile stress in the slightly prefixed composite film 10 and the reinforcing material to be welded 20 is built. Then the actual welding process starts with the force F (D), the energy E (D) and the reaction time t (D). After welding, the sonotrode lingers 91 with the force F (E) and the residence time t (E) for hardening and cooling, optionally additionally a cooling element can be pivoted. After that drive the units 93 ' . 95 ' respectively. 94 ' . 96 ' back to position I and open in reverse order. Then it will continue to clock. Optionally, as in 13 described, a draft-free feed with heated reinforcing material 20 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 2004/090589 A1 [0008, 0048]

Claims (31)

Film, in particular multilayer sunscreen or solar useful composite film for the selective filtration of solar radiation from thermoplastic plastic, characterized in that the film ( 10 ) to be worked and / or loaded areas for partial stabilization with a reinforcing material ( 20 ) is integrally connected. A film according to claim 1, characterized in that the cohesive connection between the film ( 10 ) and the reinforcing material ( 20 ) is produced by ultrasonic welding. Film according to claim 2, characterized in that on the film ( 10 ) facing away from outer surface of the reinforcing material ( 20 ) a structure ( 35 ) is shown. Foil according to claim 3, characterized in that the outer surface side structure ( 35 ) consists of closed and / or open geometries. Film according to claim 3 or 4, characterized in that the structure ( 35 ) is adapted for prefixing for a joining method or for the transport of a tissue to be fixed thereto to the structure of the fabric and / or the seam pattern. Film according to at least one of claims 1 to 5, characterized in that the film ( 10 ) on at least one surface ( 18 . 19 ) by the reinforcing material ( 20 ) is stabilized on one or both sides. Film according to at least one of claims 1 to 5, characterized in that the film ( 10 ) along at least one side edge ( 21 - 26 ) with the reinforcing material ( 20 ) is stabilized on one or both sides. A film according to claim 7, characterized in that the side edge reinforcing material ( 20 ) has a width of about 5 mm to 30 mm. Film according to at least one of claims 1 to 8, characterized in that the reinforcing material ( 20 ) consists of preferably non-oriented polyester or polypropylene. Film according to at least one of claims 1 to 8, characterized in that the reinforcing material ( 20 ) consists of a plastic fleece. Film according to claim 10, characterized in that that the plastic fleece made of polyester or polypropylene fibers consists. A film according to any one of claims 1 to 11, characterized in that the film is selected from a polyester from the group polymethyl methacrylate, polybuthyl methacrylate, polycarbonate, Polyethylene tereftalate and its derivatives, or from a polefinefin, selected from the group consisting of polypropylene, polyvinyl chloride, Polystyrene, polyethylene and their derivatives, or of a polyamide and their derivatives or from copolymers of these polymers or from Mixtures of these polymers is formed. Foil according to at least one of the preceding claims, characterized in that at least one layer of the multilayer Slide is biaxially oriented. Film according to at least one of claims 9 to 13, characterized in that the reinforcing material ( 20 ) at least 65% of the thermoplastic resin content / fiber content of the respective material on the surface of the film ( 10 ) having. Method for equipping a film, in particular multilayered sunscreen or solar useful composite film for the selective filtration of solar radiation from thermoplastic plastic, characterized in that the film ( 10 ) to be worked and / or loaded areas for partial stabilization with a reinforcing material ( 20 ) is materially connected. A method according to claim 15, characterized in that the cohesive connection between film ( 10 ) and reinforcing material ( 20 ) is produced by ultrasonic welding. A method according to claim 16, characterized in that the ultrasonic welding a punctiform or linear plasticization ( 30 ) between the facing surfaces of the film to be welded ( 10 ) and the reinforcing material ( 20 ) is made. A method according to claim 16 or 17, characterized in that in the ultrasonic welding on the outer surface of the reinforcing material has a structure ( 35 ) is displayed. Method according to claim 18, characterized in that the structure ( 35 ) is depicted as closed and / or open geometry. Method according to claim 18 or 19, characterized in that as structure ( 35 ) a prefixing for sewing or further joining method or for the transport of the other materials to be fixed for adaptation to the tissue and / or the seam pattern is displayed. Method according to at least one of claims 15 to 20, characterized in that the film ( 10 ) on at least one edge ( 21 - 26 ) or a surface on one or both sides with the reinforcing material ( 20 ) is stabilized. Method according to one of claims 15 to 21, characterized in that a reinforcing material ( 20 ) of preferably unoriented polyester or polypropylene is used. Method according to claim 22, characterized in that as reinforcing material ( 20 ) such is used from a plastic fleece made of polyester or preferably polypropylene fibers. Method according to one of claims 15 to 23, characterized in that a shrinkage in the reinforcing material to be applied ( 20 ) is anticipated by supplying heat to the reinforcing material and the energy input during ultrasonic welding is reduced by a lower differential temperature. Method according to one of claims 15 to 24, characterized in that the film to be welded ( 10 ) is heated immediately prior to ultrasonic welding to reduce the energy input during ultrasonic welding. Method according to one of claims 15 to 25, characterized in that the film to be welded ( 10 ) is stretched or prestressed around the potential shrinkage by the ultrasonic welding for the ultrasonic welding process. Method according to one of claims 15 to 26, characterized in that immediately after the ultrasonic welding the cooling of the relevant cohesive accelerated area. Device for equipping a film, in particular a multilayered sunscreen or solar useful composite film for the selective filtration of solar radiation from thermoplastic plastic, characterized by a continuous or discontinuous ultrasonic welding device ( 61 . 62 ) for applying a reinforcing material on one or both sides ( 20 ) on a region of the film to be processed and / or loaded ( 10 ) for their partial stabilization. Device according to claim 28, characterized in that the ultrasonic welding device ( 61 . 62 ) upstream and / or downstream with a stretching device ( 65 ; 93 . 95 ; 94 . 96 ) for the film ( 10 ) and / or the reinforcing material ( 20 ) and / or the welded unit of foil ( 10 ) and reinforcing material ( 20 ) is provided. Device according to claim 29, characterized in that the stretching device ( 65 ) a pair of brake rollers ( 68 . 69 ) and / or a pull roller pair ( 66 . 67 ) having. Unit according to Claim 29, characterized in that the stretching device has a hold-down unit ( 93 . 95 ; 94 . 96 ) which are perpendicular to or in the direction of the feed movement of film ( 10 ) and reinforcing material ( 20 ) is movable.