DE102008035737A1 - Lay-on roller for lying of form of film in impression roller, particularly cooling and casting roller, has flexible surface with anti-stick-effect - Google Patents

Abstract

The lay-on roller has a flexible surface with an anti-stick-effect. The surface of the lay-on roller (5') is made of material, which has a repellent force against thermo plastic. The surface of the lay-on roller or an appropriate roller shell is made of thermoplastic, particularly repellent thermoplastic, polyhalogen olefin, fluorine plastic, homopolymer and copolymer of fluoroolefin, tetrafluorethylene, terpolymer elastomer, synthetic rubber, e.g. ethyl propylene rubber and ethylene propylene diene monomer rubber, and is made of plastic on silicon basis of silicon compound material.

Description

The The invention relates to a delivery roller for the plastic melt application on a casting roll according to the preamble of the claim 1.

at the production of plastic films, such as films from Polymer melt, it is basically common the emerging from a slot die melt film by means of a so-called air knife to produce a sufficient Air speed (dynamic pressure) to a cooling roller to press. The air knife extends with its longitudinal extent transverse to the width of the melt film, ie transverse to the take-off direction the plastic film.

Next generating an air pressure, above which the melt flag is pressed against the heat sink is it alternatively or additionally also possible, a Create negative pressure. This vacuum is between the roller and the melt lug is generated, causing the melt lug to the heat sink is pressed.

After all it is also possible to apply the melt film by means of at least support electrostatic surface forces. When applying the plastic melt lug to the heat sink Care should be taken to ensure the best possible heat transfer between the polymer melt and the heat sink is achieved, especially without air pockets. Otherwise this would lead to an uneven thickness distribution of the produced Lead movies. Furthermore, it would be an uneven Heat transport and thus to a non-uniform Crystallization in the film. In addition to the mentioned air inclusions arise as a detrimental effect of the appearance of a wavy Surface, surface defects, electrical breakdowns, poor thickness tolerance etc .. All these the slides in their quality adversely affecting causes are also disadvantageous on the further use of the slides down.

From the US 3,795,474 a roll-shaped roll for applying a melt film to a cooling or casting roll is known to be known, but which does not rotate and is not in contact with the melt film. The surface of this application roller is designed to be porous. The hollow roller is supplied via a gas inlet gas, which exits through a plurality of outlet openings on the roller body and to create a gas cushion contactless the melt flag to create the large-sized cooling roller located underneath.

After all But also smoothing or smoothering plants are known by which a melt film is not only applied to a casting or chill roll to be applied, but where due to the functional principle of the melt film in its thickness is strongly changed and should be changed.

Such constructions are for example from the DE 41 25 613 A1 refer to. A melt film is fed here into the space between a cooling roller configured as a rigid surface and a pressure roller cooperating therewith, wherein the pressure roller comprises a roller shell, which consists of several concentric zones, namely with at least one inner rubber-soft zone and an outer thin metallic zone good thermal conductivity. The surface of the outer roll shell is mirror-polished, for example by hard chrome plating. In this case, the roller surface is supplied via cooling gas nozzles cooling gas.

At the time of the EP 0 899 081 A1 The known arrangement also uses a rigid roller and a co-operating deformable roller between which is fed vertically from top to bottom a wide melt film which is compressed over the cooperating rollers to less than 30% of its thickness. In this case, the one roller in the region in which it interacts with the non-deformable cooling roller while sandwiching the compressed melt film, is deviated concavely on the surface from the usual convex shape in cross-section.

A comparable arrangement is also from the EP 0 861 715 B1 known. Here, too, a melt film is fed to the gap region between a cooling roll and a shaping roll cooperating therewith, wherein the shaping roll is concavely deformed in the axial cross section in the pressure region cooperating with the cooling roll and in this region the melt film is strongly compressed compared to its original thickness. The associated outer sleeve of the deformable roller is elastic in order to be able to be deformed concavely inwards when the corresponding radial forces act on it from the cooling roller. The outer sleeve is provided with a highly polished surface, for example, with a thickness of 50 to 1000 microns, preferably 200 to 400 microns. The material used is stainless steel or nickel.

A pressure roller and a molding apparatus for use of the pressure roller in the manufacture of a plastic film is also known from US-A-5,347,347 EP 0 716 911 B1 known. The pressure roller in this case comprises a core element, which is surrounded by an intermediate layer of a flexible material. The intermediate layer in turn is dominated by an outer Me surrounded by a material having a high thermal conductivity of at least 0.03 cal / cm ² × sec × ° C. The material having the high thermal conductivity for the outermost layer is intended to be a metal selected from aluminum or aluminum alloys, copper or copper alloys, iron or iron alloys.

A pressure roller for pressing the edges of a melt flag to a cooling roller is also from JP 08039653 A known. Between the pressing and cooling roller, the melt lug is pressure-loaded and pressed, wherein the press roller is adjustable in three directions.

Finally, out of the JP 52-123453 As known to remove an arrangement in which the pressure rollers only pressure-load the edge of the plastic film. The application of the remaining melt flag is known to be via an air knife.

task The present invention is an improved application roller for In particular, applying a plastic film to a counter-roller, in particular To create cooling or casting roll.

The The object is achieved according to the invention solved in claim 1 features. advantageous Embodiments of the invention are in the subclaims specified.

By The present invention is not expected to be surprising Benefits realized.

Of the The core idea of the invention is based on the assumption that an application roller used (often referred to as a pinning roller by contrast to the prior art but the melt film in its thickness design not or in fact not changed becomes. Notwithstanding the last-mentioned application rollers, which are always designed as pressure rollers (even if they are provided with a soft and elastic roll shell), should no such by means of the mentioned application or pinning roll Pressure as in the pressure rollers used in the prior art the plastic melt are exerted so as mentioned the melt thickness is virtually unchanged or almost unchanged remains. In other words, in all cases in the frame the invention by the interaction between the pressure roller and counter-roller the melt film fed in between is not so compressed its thickness will change or even noticeably changed.

The Contact pressures are usually below 1000 N, with the Influences the take-off speed and the diameters of the rolls (i.e., the cooling and / or pinning roll) this value variable design. Contact pressures in an area below 1000 N are far below the contact pressure, as they are otherwise produced in the stretching unit of a stretching machine, there in particular when using so-called nip-rolls, for example Contact pressures of 4000 to 5000 N may arise which act on the plastic film.

The According to the invention provided low contact pressures when using the illustrated pinning roll can therefore also over the length of such Pinning roller usually easily over appropriate Adjustments to the roll stubs are made.

at the solution according to the invention thus remains the predetermined by the slot die thickness profile obtained the melt flag, which in particular for many subsequent processes are of great importance, in part even required.

Of the Thickness range of the single or multilayer prefilm is, for example between 15 μm (especially with a cast film made of polypropylene) or, for example 5000 microns (especially in a pre-film from BOPP Synpa - where synpa is the abbreviation for "synthetic Paper "is), preferably between 50 microns and 3000 μm. A synthetic paper is often polypropylene or polyester mixed with calcium carbonate (chalk) filled and thus appears white. At a so-called cast or pre-film is a prefilm, as they leave the chill roller and before carrying out a usually provided stretching method available stands.

aim The present invention is merely the melt flag even better to apply to the casting or cooling roll, without changing the thickness, with wavy surfaces or other surface defects, air pockets between casting roll and melt film and poor thickness tolerances to be avoided over the prior art. This should make the film more uniform overall be created, with the result that he is more even is cooled and the crystal formation is much more uniform and lattice free is done as in the prior art. Thereby The film is also in its surface smoothness improved overall.

In accordance with the invention, this is essentially achieved in that, in deviation from the prior art, an application roller is used whose roller shell is not provided with metal or a metal surface but consists of plastic, in particular of repellent thermoplastics such as, for example, silicone compounds (silicon compounds), EPDM, PTFE and others Fluoroplastics with low to very low tendency to adhere. In this case, a multilayer construction of these or other materials is possible. Thus, the lower layers may consist of soft, foamed material, for example, on which a roll shell is provided as outer layer, which consists of one of the aforementioned plastic materials.

The Shore A hardness of such a soft application roller should be 20 to 100 sh (A), preferably 45 to 80 sh (A). If a soft sheath made of one of the materials mentioned is used in order to achieve the above-mentioned hardness, the sheath should preferably have, for example, a thickness of between 3 and 15 mm, in particular between 5 and 10 mm and more. Likewise, the outer shell may be made thinner if, together with the aforementioned softer substructure, it is designed to meet the Shore A hardness values mentioned above. An application roller according to the invention designed in this way can preferably also be optimally adjusted over the length of the application roller to the cooperating casting or cooling roller by having support points several times over its axial length. The structure can therefore be basically comparable to a contact roller, as used for example together with a winding roller, which from the DE 102 50 863 B4 is known.

Provided the application or pinning roll by means of several of their Length spaced provided support point supported should be, may be in the field These support points are fundamentally different Surface temperatures arise. That can easily be counteracted by a continuous metal roller is used for the apply or pinning roll, in addition could simply be cooled (for example by using a liquid coolant or Coolant gas, which flows through the interior of the metal roller). Further cooling measures would not be necessary be provided. Nevertheless, it has proved to be favorable if alternative to an internal cooling or in addition also one about the length or the essential Length of the pinning roll extending cooling nozzle (or several offset cooling nozzles) are provided, for example, a cooled fluid (preferably a cooled gas such as air) in the direction of the outer jacket the pinning roll (in an area where the melt film does not surround the pinning roller).

The Non-stick effect between melt and pinning roll can also can be achieved and / or improved if the polymer or the coextrudate an antiblocking agent or an antiblocking agent is added (for example by addition of antistatic agents). A further improvement of the non-stick effect can be achieved by pre-cooling the melt before this comes into contact with the pinning roller.

For Special applications can also be useful if the pinning roll is structured. This can be a defined Surface structure are applied to the pre-film, which gives advantages for various applications, such. B. in Kondenstatorfolien. In other words, it becomes a surface structure in the sense of a rough surface preferred, in particular has advantages in the production of electrolytic capacitors. Because the surface structure of the roller, which is then a corresponding Surface structure produced in the melt film is special suitable by the rough surface to form Formation of depressions and elevations to absorb the electrolyte. Due to the rough surface, so can the electrolyte attach better to the plastic films, which, above all, too the electrical properties of using the plastic film manufactured products such as Elektrolytkondensa factors can be improved. For other products, for example through the structured, d. H. especially rougher surface the printability of the film can be improved etc ..

Further Advantages, details and features of the invention will become apparent below from the embodiment illustrated with reference to drawings. In detail:

1 : A schematic front view with respect to the use of a contact and pinning roller according to the invention in conjunction with a casting or cooling roller;

2 a schematic axial end view of an input station for producing a plastic film;

3 : a schematic side view across the representation of 1 ; and

4 : a schematic extracts axial cross section through the application roller according to the invention.

First, it will open 1 Reference is made, in which the basic structure and the basic operation of the application or pinning roller according to the invention is shown in conjunction with a casting or cooling roller, as used for example in a plastic film plant.

The from a nozzle arrangement 1 preferably in the form of a slot die 1' leaving melt film 3 (hereinafter also referred to as melt flag), by means of a contact or pinning roll 5 with a flexible (soft and / or elastic) surface, which is explained in detail below, on a casting and / or cooling roller 7 created.

The application or pinning roller 5 is hereinafter also partially referred to as a pressure roller.

The surface 5 ' the application roller 5 is designed so that it faces the melt 3 has an anti-adhesion effect, thereby sticking or sticking the melt 3 at the application roller 5 to prevent.

The Surface of the roller can vary depending on the material to be applied be different and must be adapted to its tendency to stick.

In addition, the roll surface is 5 ' flexible enough to make sure that of the slot die 1' predetermined thickness profile in the film (melt film) 3 is maintained, ie essentially maintained. Therefore, the thickness profile of the melt film should 3 after the interaction between application roller 5 and casting and / or chill roll 7 not more than 10%, preferably not more than 8%, not more than 6%, not more than 4%, not more than 2% and in particular not more than 1% or even 0.5% of the original thickness profile of the melt flag before Passage of the melt lug through the gap between the application roller 5 and casting roll 7 exhibit. The surface 5 ' the application roller 5 can be a suitably flexible roll shell 6 having accordingly from reaching selected thickness, in addition or alternatively, this roll shell 6 on an optional (soft) interlayer 40 can be provided, so this soft intermediate layer 40 surrounds. As will be discussed below, this optionally provided soft intermediate layer or the correspondingly soft (elastic) roll shell 6 on a support and / or cooling tube 41 be positioned, which can be flowed through with a cooling medium.

The application and / or pressure roller 5 For this purpose, a defined contact force F _res (i) to be set can be applied to ensure even application or pressing of the melt film (melt layer) to the casting roll 7 to ensure. The resulting application of force F _res (i) can be adjusted not only at the roll ends, but alternatively also additionally or exclusively over the entire working width (AB) at defined points (i). On a possible structure of such a contact or pressure roller 5 will be discussed below.

Due to the specified softness (flexibility) of the application roller 5 becomes the melt 3 homogeneous on one side to the casting roll 7 at any rate, much more homogeneous and uniform, and avoiding trapped air compared to other prior art methods or methods, wherein on the opposite surface side of the melt 3 opposite to the surface 7 ' on the casting roll 7 Although the melt during the application process smoothed, but the thickness - as mentioned - not deformed, and in particular is not reduced.

The mentioned homogeneous application of the melt 3 over the entire width on the casting roll 7 becomes more critical the higher the launch speeds are. Especially in opposite border areas 3 ' of the plastic film 3 creates a strong tendency that the melt 3 turns up, ie bulges. By the mechanical fixation of the melt 3 by means of the application or pressure roller 5 this effect is significantly reduced.

But it is also possible, the application roller 5 Shortened in their axial extension form, so that the edge areas 3 ' the melt 3 not in interaction with the surface 5 ' the application roller 5 devices. This can be advantageous if, in terms of process technology, a thicker edge is to be formed on the melt.

Only for the sake of completeness is also mentioned that the application or pinning roll 5 may also have one or more so-called cambers across the working width (AB), as is generally known for rollers.

Finally, the apply or pinning roll 5 If necessary, tempered by suitable measures from the inside and / or from the outside to influence the surface structure of the films produced to further reduce the tendency of the nip roller to adhere and / or increase the life of the roller surface.

The aforementioned application or pinning roller 5 has a non-stick surface 5 ' on. Ie. at least the surface 5 ' or a roll jacket 6 as the topmost layer should have a corresponding non-stick surface 5 ' be provided. As a roll shell come in so far all materials in question, which produce a repulsive effect on thermoplastics. Particularly suitable here are materials such as EPDM, PTFE silicone composites (silicone compounds) and fluoroplastics with low tendency to adhere. Furthermore, of course, a multilayer construction of one or more of these materials is possible. For example, the lower (inner) layers may consist of soft, foamed materials, which then have the upper layer as the outer layer added to said non-stick materials.

alternative the outer layer can also consist of a tube. For example, such a tube of an ethylene-propylene-diene rubber consist of a terpolymeren elastomer (EPDM). such Elastomeric hoses are made, for example, by extrusion, Radiation crosslinking, inflation and subsequent shrinking produced on the roll body of the application or pinning roll, wherein the shrinking process is generated by the action of heat. This shrink tubing can already be of its consistency and thickness be sufficient to the elastic surface layer or the elastic jacket layer according to the invention for to create the landing or pinning roll. As shrink tubing or as an outer layer can also be a PFA tube or PFA material are used. Otherwise could on the inner support or jet pipe also a sponge-like elastic layer are applied, which then covered with the shrink tube becomes. If necessary, but also other heat shrink tubing made of other materials or with similar properties be used.

In other words, so should the surface 5 ' the application roller 5 or an associated roll shell 6 from thermoplastics, in particular repellent thermoplastics, polyhalogenolefins, fluoroplastics, in particular from homopolymers and / or from copolymers of fluoroolefins, in particular of tetrafluoroethylenes and / or of terpolymeric elastomers, in particular synthetic rubbers, preferably ethylene-propylene rubber and / or ethylene-propylene-diene Rubber (EPDM) and / or silicone-based plastics including silicone composites or at least one of these materials.

The Shore A hardness should in all these embodiments for the outer cladding layer or the surface 5 ' the application or pinning roll 5 between 20 to 100 Sh (A) and preferably at 45 to 80 Sh (A).

To the sticking tendency of the roll mantle 6 Furthermore, cooling of the roll mantle is preferably provided or possible. An internal cooling can be done as usual according to the prior art via corresponding feeders and rotary seals, preferably in the form of a water cooling. This is in 4 and 5 a support and / or cooling tube 40 for the application or pinning roller 5 shown, which consists for example of metal, ie a metal alloy (steel) and preferably of a cooling medium 42 is flowed through, in particular a gaseous or liquid cooling medium such as cooled water. The same applies to an alternative or supplementary provided external cooling of the roll shell 6 , This is for example in 5 a cooling nozzle 51 located over the entire or the wesent union axial length of the application or pinning roller 5 extends. Alternatively, a plurality of separate over the axial length of the pinning roll staggered cooling nozzles 51 be provided, which is a coolant flow 53 with radial direction or radial component on the surface 5 ' the application or pinning roller 5 generate and thereby cool the surface of the application roller. This cooled medium stream is preferably made of cooled gas, in particular cooled air, wherein the coolant flow in a region on the application roller (ie, flows to the surface of the application roller), which is not from the melt film 3 surrounded or covered).

In addition, on the outer jacket 6 or the surface 5 ' a material which repels all thermoplastics may be applied in solid and / or liquid form, for example by means of a spraying process. The outer jacket 6 can also be charged with electrostatic charge in a likewise known manner to improve the overall effect of the application roller.

The mentioned cooling of the roll mantle 6 and especially the surface 5 ' It also serves to reduce degradation of the material due to the evolution of heat through the melt.

The following is by reference to 2 the further geometry of the roller 5 be explained.

As already mentioned, the application or pinning roller 5 have a multilayer construction. The diameter may be, for example, in the range of 20 mm to, for example, 100 mm, but if necessary also designed with an even smaller or even significantly larger diameter. In order to prevent deflection of the roll over the working width of the roll, it is possible to apply the piecing or pinning roll 5 can be variably supported over its working width.

In the schematic representation according to 2 , in which an input station of a plastic film stretching machine (without the following stretching stations, for example, with a transverse or longitudinal stretching system or Simultanreckanlage etc.) is described again shows the basis of 1 mentioned nozzle arrangement 1 with the slot die 1' , the melt lug leaving the die slot 3 by means of the application or pinning roller 5 on the surface 5 ' the casting roll 7 is created, where in this embodiment, the Schmelzerand 3 ' over the application roller 5 on the surface of the casting roll 7 is created.

The pinning roller 5 is about two in axial extension of the associated axle 15 the Pininngwalze 5 provided support arms 17 rotatably mounted and held, wherein the two at the opposite end face of the pinning roll 5 provided support arms 17 by means of a usually stationary in each case stand device 19 is held, as this basically also from the front view according to 3 can be seen.

At the various positions (i), a resultant force F _res (i) is to be exerted, as is the case with reference to the schematic illustration and reference to FIG 1 for a position (i) is shown. This is done first by a force application to the roll ends at (i) = 1 and (i) = n, so the n-th adjustable position for adjustment and adjustment of the pinning roll 5 ,

The force application takes place via adjusting elements, which are preferably in the horizontal x-direction according to double-arrow representation 20 on the one hand and in the vertical y-direction according to the double-arrow view 21 (in 2 ) can be generated to the other. This introduction of force must be carried out in such a way that the original thickness profile from the nozzle control does not or not significantly influence.

The introduction of force then take place in various ways, as this basically from the DE 102 50 863 as is known, to the full extent of which the disclosure is referenced. A corresponding storage and control can also with the present application or pinning 5 be provided, as shown schematically 3 is apparent.

According to DE 102 50 863 For example, a web-shaped material winding apparatus is described in which a contact roller is used to apply the film bale to be wound up. Similar to this prior art contact roll, the present apply or pinning roll 5 several in the axial longitudinal direction of the roller 5 staggered control positions (i), which can be adjusted preferably in the horizontal x-direction to one and vertical y-direction to the other accordingly. The adjustment thus takes place according to the above-known contact roller, for example via air or magnetic bearings. But also a purely mechanical support is possible. In the embodiment according to 3 and the cross-sectional view through the pinning roll 5 according to 4 is schematic to see that at the several support and rule provide (i) the actual application roller 5 Preferably, in each case at least two circumferentially offset rollers, namely preferably a rear retaining roller 10 (opposite to the casting roll 7 ) and an upper holding roller 11 is different adjustable (kraftbeaufschlagbar), wherein the roller body of the application roller 5 can rotate. Each of the support and control points (i) thus formed can - as mentioned - preferably in horizontal and vertical direction (ie at least in two different directions, which need not necessarily be aligned perpendicular to each other) are adjusted. It takes on the basis of the schematic representation in 2 to be seen support or Anstellträger 23 at the relevant support and control points (i) = 2 ... (n-1) in the embodiment shown, the corresponding roles 10 . 11 for adjusting or regulating the rollers over the working width. At the opposite ends of the rollers adjustment via a variable position support or control point with respect. The axle of the pinning roll 5 what about the pinning roller 5 is stored. With not too large axis lengths of the pinning roll, a holder and adjustment of the application roller is sufficient 5 over her stub axle. Only then, when the length of the application roller 5 Become larger over the working width, it may be appropriate and appropriate to provide additional force control points F _i - as described above - to here at certain points, for example, by the two mentioned roles 10 and 11 a force setting of the application roller 5 in two different directions with respect to the melt film 3 make.

With such an arrangement, it is thus possible to change thickness with respect. The melt to cause, but only the melt flag 3 in contact with the casting or cooling roll 7 bring to make a good thermal contact. If it is necessary for different process engineering applications, the edge 3 ' of the melt film 3 thicker than the center region, it is provided that the roll diameter at the pinning roll 5 at the edge 5 '' is executed reduced accordingly. To the edge 3 ' of the melt film 3 Nevertheless, to create, are with respect to the edge 3 ' of the melt film 3 additional rollers with a structure - comparable to the described application or pinning roll 5 - Provided, but with correspondingly shorter axial length.

following should be discussed in more detail on the drive.

The mentioned pinning roller 5 points to their opposite axes or stub axles 5a a corresponding control for the introduction of force. By appropriate adjusting elements such as a linear adjustment in the horizontal x or in the vertical y-direction, a desired force F _x or F _{y are} applied to the opposite end faces (stub axle 5a ) of the pinning roll 5 acts. To reproducibly ensure that the thickness profile of the melt film 3 is not influenced too much, via a force measuring device not shown in detail, each acting in the horizontal x-direction and in the vertical y-direction force and thus the corresponding resultant force F _res measured (the measurement preferably parallel to the adjustment component of the application roller he follows).

moreover The device can also serve that a Schmelzewulst certain places, but especially at the edge. Builds Such a melt bead, thereby affecting the force signal. The control can then the contact pressure at the point concerned humiliate.

The device, in particular the control but also has other advantages. Because with a damaged surface layer of the pinning roll 5 There is also the risk that the melt could accumulate there. If, therefore, increased forces occur in this case, the signal can also be evaluated for maintenance purposes, since the occurrence of an abnormal signal can be regarded as an indication of damage to the roller. This opens up the opportunity to swap the roller in good time.

The mentioned control elements serve to control as also for delivery and for driving away the roller.

The roller 5 can be driven by suitable motors with the interposition of a gear assembly. However, the roll can also be driven directly so as not to give rise to relative velocities, for example, at high take-off speeds of the melt. Preferably, a direct drive is used for this purpose. In addition, the force signal can also be used as a manipulated variable for the roller drive.

The Overall effect can be further improved if the polymer or the coextrudate (ie the melt film) an antiblocking agent or an antiblocking agent is added. The additional provided external and / or internal cooling of Anlege- or pinning roll can also have a surface texture be advantageous to the pinning roll, so a structured surface, the thereby applied to the pre-film. This can be advantages, for example in capacitor film production.

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

• US 3795474 [0005]
• - DE 4125613 A1 [0007]
• EP 0899081 A1 [0008]
• - EP 0861715 B1 [0009]
• - EP 0716911 B1 [0010]
• - JP 08039653A [0011]
• - JP 52-123453 [0012]
• - DE 10250863 B4 [0023]
• - DE 10250863 [0057, 0058]

Claims (15)

Application roller for applying a melt film to a casting roll, having the following features: - the application roll ( 5 ) has a flexible surface ( 5 ' ) characterized by the following further features: - the surface ( 5 ' ) of the application roller ( 5 ) has an anti-adhesion effect, - the surface of the application roller ( 5 ) consists of materials which have a repellent effect on thermoplastics, and - the roll shell has a Shore A hardness of between 20 to 100 sh (A). Applicator roller according to claim 1, characterized in that the surface ( 5 ' ) of the application roller ( 5 ) or an associated roll shell ( 6 ) of thermoplastics, in particular repellent thermoplastics, polyhalogenolefins, fluoroplastics, in particular of homopolymers and / or of copolymers of fluoroolefins, in particular of tetrafluoroethylenes and / or of terpolymeric elastomers, in particular synthetic rubbers, preferably ethylene-propylene rubber and / or ethylene-propylene rubber. Diene rubber (EPDM) and / or silicone-based plastics including silicone composites or at least one of these materials. Applicator roller according to claim 1 or 2, characterized in that below the surface ( 5 ' ) or below the roll mantle ( 6 ) of the application roller ( 5 ) a layer of foamed material is provided. Applicator roller according to one of claims 1 to 3, characterized in that the surface ( 5 ' ) and / or the roll shell ( 6 ) of the application roller ( 5 ) has a Shore A hardness of between 45 to 80 sh (A). Applicator roller according to one of claims 1 to 4, characterized in that the application roller ( 5 ) is provided with an internal cooling, in particular a fluid-based internal cooling, preferably in the form of a water cooling. Applicator roller according to one of claims 1 to 5, characterized in that further comprises means for external cooling of the application roller ( 5 ) is provided. Applicator roller according to one of claims 1 to 6, characterized in that the application roller ( 5 ) in two directions, preferably perpendicular directions for changing a distance gap to one with the application roller ( 5 ) cooperating casting roll ( 7 ) is adjustable. Applicator roller according to one of claims 1 to 7, characterized in that the application roller ( 5 ) is adjustable while generating different resulting application forces (F _res ), with which the application roller ( 5 ) in operation on a melt film ( 3 ) acting through a with the application roller ( 5 ) cooperating casting roll ( 7 ) is held. Application roller according to one of claims 1 to 8, characterized in that the opposite axes or stub axles ( 5a ) of the application roller ( 5 ) are preferably variable in position in two mutually perpendicular directions and / or for generating different contact forces (F _res ) _{i are} adjustable. Applicator roller according to one of claims 1 to 9, characterized in that the application roller ( 5 ) offset in their longitudinal direction (n-1) positions to each other, where the respective distances of the application roller ( 5 ) are individually variable in position from adjacent positions and / or generating different application forces (F _res ) can be generated. Applicator roller according to claim 10, characterized in that between the opposite the application roller ( 5 ) and via the application roller ( 5 ) adjusting stub axles or stub axle bearings at least one or preferably a plurality of setting positions for the application roller ( 5 ) are provided, the at least two in the circumferential direction of the application roller ( 5 ) offset adjustment and contact positions preferably in the form of roles ( 10 . 11 ), one in the horizontal direction to the application roller ( 5 ) offset roll ( 10 ) for applying force to the application roller ( 5 ) at least in a first direction, preferably with one in the direction of a horizontal component or in the horizontal direction and a respective second in the vertical direction to the application roller ( 5 ) offset roll ( 11 ) for bearing adjustment and application of force to the application roller ( 5 ) is provided in a further direction, preferably in the direction of a vertical component or in the vertical direction. Applicator roller according to one of claims 1 to 11, characterized in that the application roller a support and / or cooling tube ( 41 ), which is cooled by a coolant for cooling the melt film ( 3 ) can be flowed through. Applicator roller according to one of claims 1 to 12, characterized in that at least one outer cooling device is preferably in the form of one or more in the axial direction of the application roller ( 5 ) offset cooling nozzles ( 51 ), via which a coolant flow ( 53 ), preferably a gas shaped coolant flow to the surface ( 5 ' ) of the application roller ( 5 ) can be directed. Applicator roller according to one of claims 1 to 13, characterized in that the surface ( 5 ' ) of the application roller ( 5 ) a structured surface ( 5 ' ), which in particular has a predeterminable roughness due to the formation of elevations and depressions. Applicator roller according to one of claims 1 to 14, characterized in that the roll shell ( 6 ) consists of a tube, in particular a shrink tube, preferably made of EPDM material.