AT502170B1 - Molding for use in filter presses (especially as a support for the membrane) comprises a first polymer at least partly covered by a layer of ultra-high molecular polyethylene - Google Patents

Abstract

A molding for a filter press comprises a first polymer upon which there is at least regionally a second polymer comprising an ultra-high molecular polyethylene (UHMWPE).

Description

2 AT 502 170 B1

The invention relates to a shaped body for a filter press in the form of a dewatering plate or pressure plate or membrane plate or diaphragm chamber or membrane carrier plate, comprising a substrate of a first polymer on which a second polymer is at least partially arranged. Furthermore, the invention also includes a method for producing 5 of the shaped body.

Filter presses consist of several, juxtaposed elements, the filter plates together. Around these plates a membrane is stretched, which lets only liquids through. The filter plates are pressed together under pressure, while between the filter plates from inside to outside the mixture to be clarified is pressed. The solid increasingly condenses as the liquid runs out of the press. From a certain density of the filter cake is removed. In membrane filter presses, one or two membranes are clamped on a membrane support plate, depending on the variant, which are made, for example, of high molecular weight, highly heat-stabilized polypropylene. Such membranes 15, in combination with a thermoplastic elastomer for surface protection, can be adapted to specific requirements of filtration operations. The elastomeric membranes disposed on both sides of the membrane support plate may be made of vulcanized or thermoplastic specialty elastomers, such as e.g. EPDM, NBR, SBR, PP-TPE, etc. The membrane carrier plate is made according to the prior art of PEHM, PPH, PPC, or 20 PVDF, but may also be made of a metal, e.g. Steel, aluminum, etc. may be formed, whereby the formation of a frame of the said materials, in which the Membranein) are held, is possible. The plate sizes can be for example from 150 mm x 150 mm to 2000 mm x 2000 mm. In addition to the polymers mentioned for the membranes themselves, they may also consist of polyethersulfone, polyacrylonitrile, cellulose acetate, etc. 25 exist.

Since the liquid-solid mixtures to be clarified are sometimes extremely aggressive, the life of such Membranträger- or chamber plates is sometimes very limited. DE 36 37 977 A1 discloses a process for laminar joining of ethylene-propylene terpolymers (EPDM), in particular ethylene-propylene-diene elastomers, with thermoplastic materials, in particular polypropylene. This method is used for the production of membrane filter plates. To carry out, only the areas of the thermoplastic material to be connected to the EPDM are initially superficially preheated. Subsequently, the prepared for vulcanization EPDM mixture is applied to the thermoplastic material and finally the thermoplastic material is pressed with the EPDM mixture under pressure and / or heat, thereby vulcanizing the EPDM.

It is therefore an object of the invention to increase the durability of moldings for filter presses, in particular membrane (carrier) plates or pressure plates or drainage plates.

This object is achieved in each case independently by the above-mentioned shaped body, in which the second polymer is formed by an ultra-high molecular weight polyethylene, by a process for producing this shaped body, and by a filter press, which is equipped with this shaped body. The advantage here is that a higher chemical resistance and oxidation resistance to oxidizing substances in the mixture to be clarified can be achieved by the inventive, at least partially coating with the ultra-high molecular weight polyethylene. Furthermore, by the very high temperature resistance for plastics advantageous in terms of hot filtration. Similar to PTFE, UHMWPE also has a low coefficient of friction, so that the reduced friction on the one hand the discharge of the filter cake can be simplified, on the other hand, the friction is reduced to the actual membrane, so that they have a higher mobility and thus a reduced susceptibility to destruction. 55 Due to the hardness, in particular the surface hardness of the molded body, a high 3 AT 502 170 B1

Abrasion resistance achieved. In addition, the molded body coated with UHMWPE has a higher rigidity. With regard to the microbial resistance, an improvement is achieved, so that the inventive molding is also suitable for filter presses that come into contact with drinking water or food or pharmaceuticals. In contrast to conventional materials used in this field, such as e.g. Polyamide or polytetrafluoroethylene may be subjected to pretreatment with special adhesives, such as e.g. Chemo-sil®, can be dispensed with.

The first polymer of the molding may be formed by an elastomer, so that the molding can be better adapted to the respective pressure conditions in the filter press, without being destroyed.

It is advantageous if this elastomer is non-polar or medium-polar, in order to achieve a better adhesion of the UHMWPE.

To further enhance this effect, the elastomer may have a cohesive energy density - with which the polarity of the elastomer can be expressed - selected from a range with a lower limit of 10 [J / cm 3] 0.5 and an upper limit of 18 [J / cm3f5.

In particular, the elastomer is selected from a group comprising rubber, in particular natural rubber (NR), EPDM, HR, XIIR, SBR, CSM, CM, CR, BR, PU, thermoplastic elastomers, such as e.g. thermoplastic vulcanizates (TPV), for example EPDM / PP, thermoplastic polyurethanes (TPU), styrene-based thermoplastic elastomers, for example styrenic triblock thermoplastic copolymers (SBS, SIS, SIBS), thermoplastic natural rubber (NR-TP), EVA / PVDC blends , NBR / PP blends, polyetheresters, polyetherhemides, olefin-based thermoplastic elastomers (TPO), thermoplastic nitrile rubber (TP-NBR), thermoplastic fluorinated rubber (TP-FKM), thermoplastic silicone rubber (TP-Q), copolymers polyetherester (CPO, CPA) , Polyether Blockarmide (PEBA), blends of crosslinked EPM or EPDM with polyolefins (TPO), blends of uncrosslinked EPM or EPDM in polyolefins, and mixtures or blends thereof.

To increase the resistance of the molded body is advantageous if the elastomer has a Shore A hardness, selected from a range with a lower limit of 30 and an upper limit of 95. It thus also a certain adaptability to different filtration conditions, as well as different pressure conditions , As well as different sizes of the filter presses in which these moldings are used, possible.

According to embodiments, it is possible that the hardness of the elastomer is selected to Shore A, from a range with a lower limit of 45 and an upper limit of 85 and a lower limit of 65 and an upper limit of 75, whereby the press properties This molding and thus the filtration result can be improved.

The molded body may be formed as a layer. It is also conceivable or within the scope of the invention possible that UHMWPE form itself as a molded part, which is connected to the first polymer. It is thus possible a certain variability of the molding in terms of its surface texture and thus also in terms of its applicability in filter presses, in which case in particular the use of UHMWPE and its ease of processing into moldings for filter presses with special internal geometries is advantageous.

The layer may have a layer thickness selected from a range with a lower limit of 0.01 mm and an upper limit of 5 mm, whereby the molded body in turn can be adapted to a wide variety of pressure conditions in filter presses, so for example low pressure or medium pressure or High-pressure presses, without which there is a risk, that the molded body only has a relatively short service life. In addition, it is possible with such layer thicknesses to influence the chemical resistance, or the abrasion resistance and temperature resistance of the molding within certain limits, so that it can be used more versatile for different liquid-solid mixtures to be separated.

According to embodiments, the layer thickness may be selected from a range with a lower limit of 0.1 mm and an upper limit of 2 mm, or with a lower limit of 0.5 mm and an upper limit of 1 mm. 10

It is also possible to form the layer, at least in regions, in several layers, so that a reinforcement in certain areas of the shaped body, i. in its surface areas, can take place in which this shaped body is exposed to increased mechanical or chemical stress. 15

To further increase the resistance or strength of the molded body, it is possible to use a, at least partially crosslinked UHMWPE.

To increase the adhesive strength and thus to avoid delamination, it is advantageous to compress the UHMWPE with the first polymer.

In an alternative to this, this effect can also be achieved by the absorption of the UHMWPE, in particular a powder, onto the first polymer. In order to increase the adhesion of the UHMWPE to the first polymer, it is possible that this is pretreated thermally, for example by impregnation, and / or oxidatively.

Alternatively, or additionally, the UHMWPE may be surface-activated, particularly under inert gas atmosphere and / or with halogens, e.g. by gas phase fluorination, or 30 by corona treatment.

To avoid passage of liquid through the UHMWPE and thus to avoid attack, especially chemical attack, of the first polymer, it is advantageous if the UHMWPE has a closed surface, i. the layer thus formed has a closed surface.

According to one embodiment variant of the filter press, it is provided that the UHMWPE is arranged between the support body and the filter membrane at least in the region of increased friction, whereby an increased service life of the filter membrane is achieved. 40

The layer of the UHMWPE, which is applied to the first polymer can, according to an embodiment of the method by peeling or by cutting from a semi-finished product, in particular a UHMWPE sintered cake, are produced. The advantage here is that the layer thicknesses can be varied, with no large storage for 45 different layer thicknesses of UHMWPE is required.

The compression of the layer with the first polymer is advantageously carried out in addition to the application of pressure even using an elevated temperature, which is selected from a range having a lower limit of 130 ° C and an upper limit of 250 ° C, whereby the adhesive strength can be improved by the at this temperature tough plastic first polymer with simultaneous sintering of the UHMWPE.

The UHMWPE layer may for this purpose be placed in a mold and optionally held therein, whereupon an elastomer mixture, in particular for an elastomer of the abovementioned type, is injected or inserted, e.g. as a mat, which also allows more complex geometries of 5 AT 502 170 B1

Shaped bodies can be produced.

Instead of peeling layers of a sinter cake, it is provided according to a variant of the method that UHMWPE used as a powder, this Pul-5 ver in a mold and thereon an elastomer mixture, again in particular for an elastomer of the type mentioned above, is introduced , wherein by the vulcanization of the elastomer, ie the temperature which is required for the UHMWPE powder is sintered at the same time, during which a correspondingly good adhesion to the elastomer can be achieved during the sintering process. 10

For a better understanding of the invention, this will be explained in more detail below.

By way of introduction, it should be noted that individual features or combinations of features from the various embodiments described represent separate, inventive or inventive solutions.

It is known that filter presses, such as chamber or membrane filter presses, consist of a plurality of filter plates which are equipped with filter cloths and are arranged one behind the other. In this way, filter chambers are formed between the filter plates, in which way the suspension and pressure to be filtered are introduced via a feed. Through the filter cloths while a filter cake is separated from the filtrate, which is derived via a Filtratablauf. For ejection of the filter cake as well as for cleaning and maintenance or to change the filter chambers, the individual filter plates are detached from each other and moved relative to each other. For this purpose, the individual filter plates are arranged on frames 25 on which they are displaceable.

Filter presses are used for the separation of solid-liquid mixtures, for example for sludge dewatering, for the clarification of suspensions, for example in polymer conditioning or even in the food industry, such. in beer production. Especially in the food industry, filter presses can also have the effect of filtering out harmful germs when using microporous membranes.

Due to the microporosity of some filter cloths, in particular membrane filter presses, it is necessary to give up the suspension to be clarified by means of pressure on the filter press, in order to overcome the resistance, which is also partly caused by the forming filter cake. Such filter presses are known for example from DE 102 52 621 B3 and DE 39 11 697 A1. There is a comprehensive state of the art, so that the structural design of a filter press - to avoid repetition - at 40 this point is not discussed in more detail.

In filter presses, so-called membranes are used in addition to conventional filter cloths. These membrane filters are thin, highly porous materials with defined pore size, which can be made of plastic or ceramic. For example, these materials are composed of cellulose blends, polyamides, polyimides, polyurethanes, polysulfones, nylon 66, polyolefins, such as e.g. PTFE or PVPF. These membranes may also be coated, as e.g. DE 39 11 697 A1 discloses from which a filter membrane of a polymeric substrate is known, the surface of which is coated with a crosslinked polyhydroxyalkyl acrylate or methacrylate or polyacrylamide or methacrylamide. 50

It is also already known from the prior art, in particular DE 699 15 691 T2, to provide filter membranes with a layer of ultra-high molecular weight polyethylene.

The membrane plates themselves, so for example, the support bodies for the membranes, 55 were previously attributed only little importance. This is where the invention starts. 6 AT 502 170 B1

In a first embodiment of the invention, the shaped body is designed as a so-called membrane carrier plate. Membrane carrier plates serve to receive the membranes and consist for example of a substrate made of a first polymer. This polymer can, as known from the prior art, be formed by polypropylene, or this polymer can also be an elastomer. Since the membrane support plate of the membrane should give a certain support, it is advantageous that it has sufficient inherent rigidity. For this purpose, the first polymer according to the invention may be an elastomer which has a hardness up to an upper limit of 105 Shore A or 95 Shore A or 75 Shore A. In particular, elastomers are used for the membrane support plate according to the invention, selected from a group comprising rubber, in particular natural rubber (NR), ethylene-propylene-diene elastomers (EPDM), butyl rubber (IIR), carboxylated butyl rubber (XIIR), styrene-butadiene rubber (SBR ), Poly (chlorosulfone-methylene) rubber (CSM), chloroprene rubber (CR), butadiene rubber (BR), nitrile rubber (NBR), carboxylated nitrile rubber (XNBR), bromobutyl rubber (BIIR), chlorinated polyethylenes (CM), polyisoprenes (IR), chlorosulfonated polyethylenes (CSM), an ethylene-propylene rubber (EPM, EPDM), a thermoplastic elastomer, such as a polyurethane, an ethylene-phenyl-acetate rubber (EVA, EVM), an acrylate rubber (ACM, ANM), an epichlorohydrin rubber (CO), a polyurethane rubber (AU, EU), a silicone rubber (P / VMQ), and derivatives thereof , such as Chlorinated rubbers, as well as mixtures or blends or blends thereof. In particular, it is advantageous if an elastomer which is non-polar or medium-polar is used as the membrane carrier plate for the production of the shaped body. Since determination of the polarity of elastomers is sometimes difficult, the cohesive energy density, which is e.g. can be determined from source measurements, used. The cohesive energy density of the elastomer is preferably selected from a range with a lower limit of 5 [J / cm 3] 0.5 and an upper limit of 23 [J / cm 3] 0.5, preferably with a lower limit of 7 [J / cm3] 0x5 and an upper limit of 20 [J / cm3] 0.5, in particular with a lower limit of 10 [J / cm3] 0.5 and an upper limit of 18 [J / cm3] 0'5 The thermoplastic elastomer may be a thermoplastic polyurethane block copolymer at least consisting of monomer units A and B, eg a diblock copolymer ([AB] "), a triblock copolymer (An-Bm-An), a segmented copolymer ([Aa-Bb] n), a star block copolymer ([An-Bm] xX where x> 2). The thermoplastic vulcanizate can be formed from an ethylene / propylene-diene-methylene (EPDM) polypropylene (PP) mixture, wherein the EPDM content of the mixture according to one embodiment variant can be selected from a range with a lower limit of 20%. , preferably 25%, in particular 30%, and an upper limit of 45%, preferably 40%, in particular 35% or, according to a further embodiment, the polypropylene content of the mixture may be selected from a range with a lower limit of 5 %, preferably 7%, in particular 10%, and an upper limit of 25%, preferably 17%, in particular 15%. It can thus the elongation at break, depending on the design of the EPDM / PP blend, i. mechanical EPDM / PP blend or EPDM / PP blend with partially cross-linked EPDM phase or highly-evaporated EPDM phase, can be set to values of approx. 300 or 45 350%, or values of the order of magnitude for mechanical EPDM / PP blends from 600% to 800%. Likewise, the tear strength can be varied accordingly, for example between 5 MPa and 30 MPa.

Particularly preferred as the material for the first polymer EPDM. 50

The membrane (s) is (are) installed in the membrane carrier plate, wherein the membrane carrier plate, for example, may have a sealing edge and the membrane is loosely mounted in the sealing edge. Likewise, the membrane can be mounted on an outer surface or in a frame of the membrane support plate. 55

For example, a clamping ring can be used for installation in the membrane carrier plate, this clamping ring being made of a thermoplastic material, such as e.g. Polypropylene or PVDF, may be formed. On the other hand, it is also possible to produce this clamping ring also from a molded body according to the invention, which has a coating, 5 at least partially, of ultra-high molecular weight polyethylene. This clamping ring in the form of the shaped body according to the invention advantageously has a lower hardness than the membrane carrier plate, for example, this hardness is selected from a range with a lower limit of 20 or 30 or 45 Shore A. Of course, other than the above hardness values selected from the ranges mentioned possible.

In principle, the shape of the membrane support plate is based on the shape of the membrane used, that is, for example, round or polygonal, in particular square or 15 square formed, with sizes up to 2 m diameter or side length are possible.

The coating of the substrate, i. the first polymer, with the second polymer, ie the ultra-high molecular weight polyethylene, can be carried out at least in regions, wherein the coating is advantageously arranged in those areas which either increased mechanical stress or increased chemical attack by the suspension to be clarified or to be clarified Medium subject, so for example, those areas in which this medium could come into contact with the membrane support plate. Of course, it is within the scope of the invention possible to coat the entire membrane support plate with the ultra-high molecular weight polyethylene.

The layer thickness of the UHMWPE layer may vary depending on the desired resistance or on the application, this layer thickness may be selected from a range with a lower limit of 0.01 mm and an upper limit of 5 mm or for applications, which cause less wear of the membrane support plate, with a lower limit of 0.1 mm and an upper limit of 2 mm and a lower limit of 0.5 mm and an upper limit of 1 mm. It is also possible that the layer is formed in multiple layers, at least regionally, so that in turn only those areas that are exposed to increased mechanical or chemical attack are provided with a higher layer thickness and thus costs for the membrane support plate can be saved , In contrast to the membranes, which are known from the prior art and coated with ultra-high molecular weight polyethylene, the layer on the shaped body according to the invention, so for example the membrane support plate, no porosity, ie a closed surface. It is thus prevented that corrosive media to the surface of the substrate of the membrane support plate, i. of the molding, get. 45

In addition to this embodiment variant of the shaped body as a membrane support plate, there is also the possibility in the context of the invention that the membranes are arranged on a separate membrane support plate, or filter cloths are arranged in a clamping frame, and the shaped body as a membrane plate, which is arranged between the membranes out - 50 is formed. Such a membrane plate or pressure plate, for example, have the function to transfer the pressure on the forming filter cake to squeeze him, so to speak, whereby this membrane plate may have some flexibility and therefore with a Shore A hardness of the substrate, so for example the elastomer, is formed, which extends in the range of the lower limits of the specified ranges or up to the middle 55 value ranges of the specified hardness ranges. It is also of advantage that the regions provided with it have a higher rigidity due to the ultra high molecular weight polyethylene, so that the pressure which is exerted on the filter cloths or the membranes and thus on the filter cake is transmitted as evenly as possible , In addition to the aforementioned embodiments of the molding according to the invention, this may also be formed as a dewatering plate or as a scraper, it may be advantageous if the scraper is formed with a lower hardness, whereas the dewatering plate in turn has a higher hardness. In principle, the invention encompasses all shaped bodies for filter presses, in particular membrane filter presses, which are formed from a first polymer, in particular an elastomer, as a substrate, which can come into contact with the media to be filtered and thereby undergo chemical attack, for example by oxidation or corrosion. may be exposed, or even mechanical stress, such as Friction, cavitation, etc. can be exposed 15.

In terms of friction, it is advantageous, especially for cost reasons, if the ultra-high molecular weight polyethylene coating is placed only in the regions of increased friction. 20

To increase the resistance of the UMWHPE layer, it may be advantageous to use a crosslinked ultrahigh molecular weight polyethylene or an at least partially crosslinked one. Suitable as ultra-high molecular weight polyethylene are e.g. Products of Ticona Engee-niering Polymers, which are available under the trade name GHR®.

These are the types GHR® HMW-PE (High Molecular Weight Polyethylene) and GHR® VHMW-PE (Very High Molecular Weight Polyethylene). For the production of, at least partial coating of the substrate of the first polymer of the molding according to the invention, on the one hand there is the possibility of going out of films from UMWHPE, or on the other hand it is possible to use the UMWHPE in powder form. For the first variant, it is possible to start from a semi-finished product which consists of sintered ultrahigh-molecular-weight polyethylene, and to peel it of the desired layer thickness or to obtain it in a different mechanical way. This film or layer can be pressed in sequence with the first polymer, in particular the elastomer, for which it is possible, for example, for this layer or film to be placed in a mold on which the substrate is laid, optionally on the substrate again a layer or film is applied, and the compression is carried out at elevated pressure and elevated temperature. Preferably, the compression takes place at a pressure selected from a range with a lower limit of 10 bar, preferably 50 bar, and 45 an upper limit of 1000 bar, preferably 150 bar instead. The temperature can be selected from a range with a lower limit of 130 ° C and an upper limit of 250 ° C.

Alternatively, it is possible for the layer of UHMWPE to be placed in a mold and then injected with an elastomeric admixture and vulcanized thereafter to allow the vulcanization process to contact the UHMWPE layer. It is possible in this way, at least one step for the pressing of the UMWHPE layer with the first polymer, i. especially to save the elastomer and herzustelien also more complex geometries. In this variant of decomposition, it is also possible to apply at least one further layer of the 9AT 502 170 B1 UHMWPE to the elastomer mixture before the vulcanization takes place.

It is also possible, instead of layers, to produce a shaped body made of UHMWPE, to place it in a mold and, for example, to spray an elastomer onto it. 5

According to one embodiment variant of the invention, it is provided to form the coated shaped body starting from a powder of UMWHPE, wherein this powder can in turn be introduced into a mold and then the elastomer is introduced into the mold. During the subsequent vulcanization of the elastomer, sintering of the UMWHPE powder is simultaneously achieved due to the predominant temperature. Thus, once again, a solid film, preferably with a closed surface, is formed from the ultrahigh molecular weight polyethylene, which is bonded to the elastomer due to the surface smearing or softening of the UMWHPE powder. 15 It is possible, especially with the latter procedure, to produce the UHMWPE itself in the form of a for-part instead of the layer and to bond it to the first polymer, so that moldings with complex geometries can also be produced.

To increase the adhesion of the ultra high molecular weight polyethylene layer to the first polymer, on the one hand, it is possible to thermally, e.g. by flame treatment, or alternatively, the film can be exposed to a glow discharge under helium or neon atmosphere, forming reactive noble gas radicals attack the surface of the UHMWPE layer and thus achieve better adhesion. Optionally, it is possible with this pretreatment to bond the UMWHPE layer with the first polymer 25, so that the compression or bonding during vulcanization can be dispensed with.

Alternatively or additionally, the surface of the UHMWPE layer (s) or the UHMWPE molding and / or the elastomer may be at least partially halogenated, e.g. Chlorination, in particular flourisation, etching, treatment with ozone and / or corona treatment and / or plasma treatment and / or with radiation, e.g. UV light, electron radiation, ion radiation, pretreated to improve the adhesion.

By the high-frequency discharge (corona) can also be performed at the same time a cleaning 35, by absorbing substances can be eliminated. The advantage here is that the surface remains "cold" and thus the basic properties of the UHMWPE or the first polymer are not or only slightly changed. It is thus also possible to produce special functional groups, in particular also on inert surfaces. The corona or plasma treatment can produce a high uniformity of the layer thickness and the structure, or the surface and layer properties can be selectively adjusted within wide limits to the particular requirement. In addition, the corona or plasma process is solvent-free, i. dry process, which not only gives environmental benefits, but also saves on chemicals costs. 45

It may also be advantageous if the surface of the UHMWPE layer (s) or of the UHMWPE shaped body and / or of the first polymer, in particular of the elastomer, if this is used, for example, as a mat, at least partially, in particular, before bonding to one another in those areas where the connection takes place, it becomes roughened. This roughening may be mechanical, e.g. with a brush, a sandblasting nozzle, an abrasive article, e.g. Emery paper, made a cutter. Alternatively or additionally, the roughening can also be carried out chemically, e.g. by spraying or dipping with or in an etching or pickling solution or solvent to dissolve the surface, thereby also improving the adhesion of the UHMWPE to the first polymer 55 by forming a kind of "scribing" by the penetration of the coating material into

Claims (31)

10 AT 502 170 B1 the depressions or furrows in the surface of the profile element or the base body or by increasing the surface available for adhesion can be achieved. Of course, it is possible to clean the layer (s) or the molding (s) prior to bonding with the first polymer. All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10. The embodiments describe possible embodiments of the molded body, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather Rather, various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action by objective invention in the skill of those working in this technical field. There are therefore also all possible embodiments, which are possible by combinations of individual details of the illustrated and described embodiment, the scope of protection. The task underlying the independent inventive solutions can be taken from the description. 1. molded body for a filter press in the form of a dewatering plate or pressure plate or membrane plate or diaphragm chamber or membrane carrier plate, comprising a substrate of a first polymer on which at least partially a second polymer is arranged, characterized in that the second polymer by a ultra-high molecular weight polyethylene (UHMWPE) is formed. 2. Shaped body according to claim 1, characterized in that the first polymer is an elastomer. 3. Shaped body according to claim 2, characterized in that the elastomer is non-polar or medium-polar. A molded article according to claim 3, characterized in that the elastomer has a cohesive energy density selected from a range having a lower limit of 10 [J / cm] 0.5 and an upper limit of 18 [J / cm 3] 0.5 , 5. Shaped body according to one of claims 2 to 4, characterized in that the elastomer is selected from a group comprising rubber, in particular natural rubber (NR), EPDM, IIR, XIIR, SBR, CSM, CM, CR, BR, PU, thermoplastic Elastomers, such as thermoplastic vulcanizates (TPV), for example EPDM / PP, thermoplastic polyurethanes (TPU), styrene-based thermoplastic elastomers, for example styrenic triblock thermoplastic copolymers (SBS, SIS, SIBS), thermoplastic natural rubber (NR-TP), EVA / PVDC blends , NBR / PP Blends, Polyether Esters, Polyetheramides, Olefin-based Thermoplastic Elastomers (TPO), Thermoplastic Nitrile Rubber (TP-NBR), Thermoplastic Flour Rubber (TP-FKM), Thermoplastic Silicone Rubber (TP-Q), Copolymeric Polyetherester (CPO, CPA) , Polyether block amides (PEBA), blends of crosslinked EPM or EPDM with polyolefins (TPO), blends of un-crosslinked EPM or EPDM in polyolefins, and mixtures or blends thereof. Shaped body according to one of claims 2 to 5, characterized in that the elastomer has a Shore A hardness selected from a range having a lower limit of 30 and an upper limit of 95. 7. Shaped body according to one of claims 2 to 5, characterized in that the elastomer has a Shore A hardness, selected from a range with a lower limit of 45 and an upper limit of 85th Shaped body according to one of claims 2 to 5, characterized in that the elastomer has a Shore A hardness selected from a range with a lower limit of 65 and an upper limit of 75. 9. Shaped body according to one of the preceding claims, characterized in that the UHMWPE forms a layer. 10. Shaped body according to claim 9, characterized in that the layer has a layer thickness selected from a range with a lower limit of 0.01 mm and an upper limit of 5 mm. 11. Shaped body according to claim 9, characterized in that the layer has a layer thickness selected from a range with a lower limit of 0.1 mm and an upper limit of 2 mm. 12. Shaped body according to claim 9, characterized in that the layer has a layer thickness selected from a range with a lower limit of 0.5 mm and an upper limit of 1 mm. 13. Shaped body according to one of claims 9 to 12, characterized in that the layer is at least partially ausgebiidet in several layers. 14. Shaped body according to one of the preceding claims, characterized in that the UHMWPE is at least partially crosslinked. 15. Shaped body according to one of the preceding claims, characterized in that the UHMWPE is formed as a molded part. 16. Shaped body according to one of the preceding claims, characterized in that the UHMWPE is pressed with the first polymer. 17. Shaped body according to one of the preceding claims, characterized in that the UHMWPE is sintered onto the first polymer. 18. Shaped body according to one of the preceding claims, characterized in that the UHMWPE is thermally pretreated before the connection with the first polymer, for example by flaming, and / or oxidatively. Shaped body according to one of the preceding claims, characterized in that the UHMWPE layer is superficially treated by treatment with a glow discharge under inert gas atmosphere and / or with halogens, e.g. activated by gas phase fluorination, or by corona treatment. 20. Shaped body according to one of the preceding claims, characterized in that 12 AT 502 170 B1, the UHMWPE has a closed surface. 21. Filter press comprising at least one filter membrane and at least one support body for the filter membrane, characterized in that the support body formed as a shaped body according to any one of the preceding claims 5. 22. Filter press according to claim 21, characterized in that the UHMWPE is arranged at least in the region of increased friction between the support body and the filter membrane. 10 23. A method for producing a shaped body for a filter press in the form of a dewatering plate or pressure plate or membrane plate or Membranembranammer- or membrane carrier plate comprising a substrate of a first polymer on which at least partially a second polymer is arranged, in particular according to one of claims 15 che 1 to 20, characterized in that as the second polymer, an ultra-high molecular weight polyethylene (UHMWPE) is arranged. 24. The method according to claim 23, characterized in that the UHMWPE is formed as a layer. 20 25. The method according to claim 24, characterized in that the layer of a semi-finished product, in particular of a sintered semi-finished product, made of UHMWPE by peeling or machining. 26. The method according to claim 24 or 25, characterized in that the layer is pressed with the first polymer. 27. The method according to claim 26, characterized in that the pressing is carried out at a temperature which is selected from a range having a lower limit of 130 ° C and an upper limit of 250 ° C. 28. The method according to any one of claims 24 to 27, characterized in that the UHMWPE layer is placed in a mold and optionally held and thereon an elastomer mixture, in particular for an elastomer according to one of claims 3 to 5, 35 injected or inserted, e.g. as a mat, will. 29. The method according to any one of claims 24 to 28, characterized in that the UHMWPE layer is pretreated thermally and / or oxidatively. A method according to any one of claims 24 to 29, characterized in that the UHMWPE layer is heated in an inert gas atmosphere of a glow discharge and / or halogens, e.g. a gas phase fluorination, or a corona treatment is exposed. 31. The method according to claim 24, characterized in that the UHMWPE is introduced as a powder in a mold and thereon an elastomer mixture, in particular for an elastomer according to one of claims 3 to 5, and that during the vulcanization of the elastomer, the powder is sintered , so no drawing 55