CS219907B2 - Combined three-component material and method of making the same - Google Patents

Abstract

Composite consists of a combination of polyalkyl methacrylate (I) with polyvinylidene fluoride (PVDF) and of (I) with a thermoplastic polymer (II), which is incompatible with PVDF. The composite has >=1 outer surface of PVDF and a surface of (II). PVDF and (II) pref. are joined through (a substance contg.) (I). The composite pref. is produced by coextrusion of (I) or a mixt. contg. >=30 wt. % (I) between PVDF and (II). The composite can be made into tubes, hoses, profiles, films and sheets (suitable for thermoforming). It has a homogeneous structure, in which the components are intimately bonded.

Description

The invention also relates to a process for the production of a composite material consisting of a polyvinylidene fluoride and a non-polyvinylidene fluoride-bonded thermoplastic polymer, characterized in that the polyvinylidene fluoride, polyalkyl methacrylate and the non-polyvinylidene fluoride bonded thermoplastic polymer are co-extruded. All three components, when exiting the extruders, are joined together at the latest at the end of the extruder tube maintained at a temperature in the range 180 to 280 ° C.

The present invention relates to a composite material consisting of polyvinylidene fluoride, i.e. a polymer referred to hereinafter as PVF _2, and a thermoplastic polymer not bonding (incompatible with PVF ₂₎ , as well as a method for producing such material by coextrusion.

The technique of coextrusion of thermoplastics is known and is described in particular in the "POLYMER PLASTICS TECHNOLOGY AND ENGINEERING, Vol. 3, pp. 49 to 68: "Co-Extruded Films - Method and Properties" by J. E. Guillotte.

In general, three methods for co-extruding thermoplastics from a plurality of conventional extruders are known, the number being the same as the number of extruded polymers. The first method consists in separately extruding the individual polymers and joining them together as they emerge from the extrusion die.

In the second method, thermoplastics from at least two extruders are fed to a single extruder, the extruder having as many channels as the extruders and hence the extruded polymers.

The streams of the individual polymers join at the edges of the extrusion die, i.e., almost immediately before leaving the extrusion die. In a third method, polymers from a select number of extruders are fed to a flow distributor in which they join to form a single stream which is fed to the extruder die. In these methods, the speeds at which the streams exit the extruders generally provide a means of controlling the relative thicknesses of the extruded streams.

While many polymers can be coextruded, using this technique fails to couple PVF ₂ to other polymers. This is due to the fact that PVF ₂ does not (is incompatible) with other polymers, and also the well-known fact that fluorinated resins are very difficult to adhere to most thermoplastic polymers.

This difficulty in combining PVF ₂ with other thermoplastics can also be encountered when using a lamination technique that involves two preformed films, one of PVF ₂ and the other of any selected thermoplastic, adjacent to each other. to adhere to each other under pressure and heat. Attempts have also been made, but unsuccessfully, to laminate a preformed PVF ₂ film with a film of polyvinyl chloride, polystyrene, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer immediately as it leaves the extruder, i.e. in a practically molten state. Even under these conditions, the two polymers are easily separated from each other after cooling.

In the prior art, adhesives have to be used to combine PVF ₂ with another thermoplastic that is not bondable to PVF ₂ . The disadvantage of this method is that it involves three stages:

preparing the film from PVF ₂ , preparing the film from thermoplastic, gluing and pressing the films together.

These processes are impractical, slow, generally requiring the use of solvent-based adhesives that are difficult to remove and do not allow the obtained composite material to be used immediately after manufacture due to the time required to dry the adhesive. In addition, the obtained composite material is not uniform, since the interfaces are still exposed to phenomena which may cause disintegration of the individual components. Therefore, it can be said that gluing does not achieve a uniform composite material, but in this process the thermoplastic materials merely stack together to form a final heterogeneous product.

These drawbacks are overcome by the invention. The invention provides the possibility of obtaining a new, uniform, truly combined material of a homogeneous composition in which the individual elements are firmly connected to each other. This novel composite ternary material consisting of one outer layer of polyvinylidene fluoride (PVF _and another layer of non-polyvinylidene fluoride-bonded thermoplastic polymer) is characterized in that the intermediate tie layer is a C 1 -C 3 alkyl alkyl methacrylate, alone or in in combination with another thermoplastic polymer which is present in an amount of at most 30% by weight.

Another thermoplastic polymer optionally used in combination with a C 1 -C 3 polyalkyl methacrylate is a polymer selected from the group consisting of fluorinated thermoplastics, chlorinated vinyl polymers, styrene polymers, polycarbonates, polyurethanes, polyether ethers, copolymers styrene with acrylonitrile and grafted acrylic elastomer, acrylonitrile copolymers with butadiene and styrene, polyacrylic esters, copolymers of acrylic esters with vinyl derivatives, and copolymers of methyl methacrylate with vinyl chloride, vinyl acetate, methyl acrylate, styrene, acrylonitrile, acrylonitrile or isobutylene.

The interface between polyvinylidene fluoride and polyalkyl methacrylate and between the incompatible thermoplastic polymer and polyalkyl methacrylate consists of an alloy that can be obtained, for example, by mixing the components in the molten state, which means that the combined material can be regarded as a composition. for the uniform and homogeneous so unlike ZVA Joint composite material .s heterogeneous composition, which is obtainable nápHklad Lepeda, wherein the extended ram ^{h, kt} era have in this case, no transition zone, they are distinct, visible and vulnerable. The product according to the invention may also be defined as a composite material consisting of three components, produced by combining polyvinylidene fluoride and polyalkyimethakrylátu po'ya ^to rylmetha ^for triacrylate thermoplastic ^poly mer of ^p not connect with potyvinylidenfluoridem ™, which material has at least one outer layer of polyvinylidene fluoride . and one layer of thermoplastic polymer not bonding to polyvinylidene fluoride. The outer layer or layers of polyvinyl ^yl ENF ^d i ⁱ u ^id fluoro are among ^{the bi} om ^eh cation of the material according to the invention usually devoid polyalkylmethakrylátu acting as a binder. This is understandable if sl polyvinytideiifteorte ^P ovrc ^h after ^d u ^t RZE any inherent properties.

For the most part, the combination material according to the invention usually has only one outer layer of polyvinylidene fluoride, the second outer layer of which is a thermoplastic polymer not bonding to polyvinylidene fluoride. However, the thermoplastic polymer does not associate with the polyvinylidene fluoride may constitute an attachment layer for the other material. It is therefore possible for the combined material according to the invention that its two outer layers consist of polyvinylidene fluoride in this connection sequence of the following three elements:

PVDF - polyalkyl - nespoiující thermoplastic polymer is polyvinylidene fluoride - polyalkyl ^ylate - pol ^y vin ^{yl id id} ene ^fluorine. Accordingly, according to the invention, a "layer of polymer not bonding to the polyurethane fluoride" may mean both an outer and an inner layer.

The product of this type which may be of any shape conventional for thermoplastics such as pipes, clutches, profiles, films and sheets (plates), wherein the film and sheets (plates) may be further re-shaped by known techniques such as molding lisovámm ^t e ^pl em zmlčeného matěг ^la · ^{l u,} I vel advantageous as it has at least one outer layer which is resistant to weathering, and which generally has all the characteristics inherent polyvl · nyliděnfluoridu, and a further layer, characterized .se mechanical properties and all orácně by properties inherent in thermoplastic polymers not associated with polyvinylidene fluoride, but in the form of a uniform and homogeneous material.

The material according to the invention is very advantageously obtained by coextrusion, which is very surprising in view of the notorious difficulty of forcing polyvinylidene fluoride to adhere to the thermoplastic polymer. It has been found that when pdyalkylmethalkrylát coextruded with PCL vinyiiděnflucrl · ^s and not DEM ^^ i ^ .jujícím the thermoplastic material so that it is positioned polyalkyl. between the two polymers, a combined operation is obtained in a single operation which can be used immediately and in which all the individual layers are firmly bonded to one another.

^{Pla d} subject in ^y n and ^l of cut is therefore a method of producing a composite material consisting of PCL ^y l · nyliděnfluoridu and thermoplastic polymer not · connecting with polyvinylidenflucriděm, the method consists in the ^fact that along the ^Y button ^No. TO, THE pol ^{Vin y} liděnflucrld, poly ^ ^ lkylmetha acrylate and the thermoplastic polymer with nespojujteí pdyvinyllděnflucriděm, 'wherein the poly-lkylmethakrylát serves as a binder and intermediate streams. All three components, when exiting the extruders, are joined together at the latest at the end of the extruder maintained at a temperature in the range of 180 to 280 ° C.

Although all pclyvinyliděnflucrid ^s provide satisfactory results achieved best results with PVF ₂ of such a range of apparent viscosity at 200 ° C, in that - at least two rate gradients listed in below Table below - has an apparent viscosity within the · between these two extremes of apparent viscosity.

adíent ^ r ^y c ^h Tost ^{and 1} sec values of apparent viscosity in Pa.s Minimum Maximum

3,543

11,811,8

35,41,1

1180,65

3540,39

11810.23

X 10 ³ 20.0 X 10 ³ X 103 9.3 X 10 ³ X 103 4.7 X 10 ³ X 10 ³ 2 ^, 1 X 103 X 103 1.0 X 103 X 10 ³ 0.45 X 103

Said apparent viscosity is measured in a known manner with a capillary rheometer phhléůnutm Rablnowhchově ^{to the} ore or ^{the p} ro non-Newtonian fluid.

Although, considered generally, the layer thickness is not critical PVF _2, is preferred for economic reasons to produce combined mater ^^ un ^eH oz ttouštRa layer ^P W ₂ is in the range from 10 μηι to several tenths of millimeters.

In addition, polyvinylidene fluoride means not only a homopolymer but also copolymers containing at least 70% by weight of why. PVF ₂ , or mixtures of PVF2 with other polymers.

The polyalkyl methacrylate is preferably polymethyl methacrylate (PMMA) whose viscosity in the molten state falls within the viscosity range of commercially available polymethyl methyl acrylates, and the viscosity may optionally be adjusted using known means to suit the desired viscosity, for example by mixing with a small amount of filler or other. % of the polymer, but such that the mixture contains at least 75 wt.% of polyalkyl methacrylate.

Furthermore, it was found that the quality of polyalkylmethakrylátu and ^{P or} A ^{de EZ} t ^{y p} olyvin polyvinylidene fluoride should be selected in accordance with the viscosity of the thermoplastic material nespojujícího with PVF _2, in the molten state. Excellent results are obtained with polymethyl methacrylate viscosities, measured at a temperature of 200 degrees Celsius, in the range given below for the appropriate velocity gradient. However, the viscosity need not be limited to these values since it can be adjusted depending on the extrusion temperature.

^g radient speed s ^{_1 h} o ^{d d} seem to be minimal viscosity in Pa.s maximum 3.54 10.0 x 103 ^50, 0 ^x 10 ³ 11.81 5.0 x 103 28.0 x 103 35.4 ² 5 10 ^{3 χ} 15.0 x 103 118 1.3 x 10 8.0 x 103 354 0.7 x 103 ^{5 x} 10 ³ 0 1181 ^0, 35 ^× 10 ^-3 3.0 x 103

It is also possible to admix polyalkylmethakryláto and ^l es ^p o ^{d N} One al ^{width p} lastic thermoplastic polymer under the condition that the mixture with polyalkyl-ATO jrným thermoplastic polymer contains at least ³⁰ wt% ^s po'l alk ^yl methacrylate ^Ylä herein. The polymer added to polyalkylmethakrylátu may be chosen from the following substances: Uuorované le ^ op ^ hundred ctoorované vin ^y nominal polymers, styrene polymers, polycarbonates, polyurethanes, poly (ester-ethers, ^copoly and chlorinated styrene with acrylonitrile and grafted acrylic elastomer, a copolymer of acrylonitrile-butadiene-styrene terpolymer, polyacrylic esters such as polymethyl acrylate, polyethyl acrylate or polybutyl acrylate, ^or OPO ^poly mer ^y these acre ^y-target esters such as vinyl derivatives, or copolymers of alkyl methacrylates such as vinyl chloride, vinyl acetate, methyl acrylate, styrene, isobutylene, acrylic acid, acrylonitrile and methyl acrylonitrile.

The thickness of the polyalkyl methacrylate is adjusted, as necessary in individual cases, in the range of several μπι to 200 μη. Generally speaking, it is not advisable to work with greater thicknesses due to the role that polyalkyl methacrylate would play in the mechanical properties of the entire composite material.

The thermoplastic polymer not associated with PVF2 may be, among others, a chlorinated vinyl polymer such as polyvinyl chloride or polyvinylidene chloride, a styrene polymer such as polystyrene or reinforced polystyrene, polycarbonate, polyurethane, a styrene-acrylonitrile graft copolymer with acrylonitrile and acrylonitrile copolymer styrene. This layer of thermoplastic polymer can have any poured thickness, typically from a few tens to several mm. The thermoplastic polymer may contain fillers, plasticizers, stabilizers, colorants or other conventional additives.

The equipment used for the production of material it Combined ^{e p} o ^y n ^dl EV ^AL sectional ^area, consists of the displacement machines, the discharge nozzle and preferably a flow distributor, said apparatus is all conventional-type currently utilized in the art of co-extrusion of thermoplastics. The thickness of each of the layers is controlled according to the feed rate of each of the extruders.

^P ro ^{at an} all ^PU with ^b at the stage in ^y n and ^{l b} is cut yl die extrusion temperature ranges from 180 to 280 ° C, which depends on the materials to be coextruded. Temperatures výUačnýc machines ^h j and ^k are such you would normally use for separate extruding the individual polymers.

It is recommended to ensure a satisfactory final cohesion of the three polymers. ^p with ^p rovádět olečn ^{é ytl} and ^No. OC ^and this m · three ^p ol ^y mer flow and ^would ηater ^iály, odmázeje ^c-d of the above machines with Harných ^ ity therefrom ^p oz ěji ^d at die edges. In some at ^p and ^d ec ^h Nern (iosažená soiu ^d ržnos ^t yet ^{uPL Na,} and ^P roto is preferred and ^{the p} drilled ^{soil P} VF ^2, thermoplastic and polyalkylmethakrylátu discharged from the displacement machine progressed before reaching the edge extrusion sleeve together, touching one another. In this ^or Ada · the town výUatoé Humac with ně21990

how many channels the current distributor should be positioned between the outlets of the extruder and the single-channel discharge nozzle.

In a variation, using co-extrusion technology with at least three extrusion machines, a combined material having the following three components can be obtained:

PVF ₂ - polyalkyl methacrylate - thermoplastic polymer not associated with PVF ₂ - - polyalkyl methacrylate - PVF ₂ .

The following examples illustrate the invention.

The viscosity is measured with an INSTRON Model 3211 capillary rheometer having a capillary length of about 50.8 mm with a nozzle diameter of about 1.27 mm.

Example 1

Three SMTP - KATFMAN extruders are used, the first of which includes a degassing device having a diameter equal to 120 millimeters and a screw having a length equal to 33 times its diameter. It is used to extrude acrylonitrile-butadiene-styrene copolymer (ABS), while the second extruder has a diameter of 50 mm (SUPER - 2 x 50) and is used to extrude polymethyl methacrylate [PMMAJ. A third extruder with a diameter of 40 mm is used for extrusion of PVF ₂ .

From these three extruders, the individual streams arrive at a cylindrical distributor which is rigidly connected to a conventional flat extrusion die providing a sheet of approximately 4 mm thickness, followed by a calender and a conventional extruder for extruding the sheets.

UGIKRAL SF 10 436 is used as acrylonitrile-butadiene-styrene copolymer, ALTULITE-2710 is used as polymethyl methacrylate and FORAFLON 1000 HD as polyvinylidene fluoride.

The viscosity of the acrylonitrile-butadiene-styrene copolymer, measured at 220 ° C of 7.5 x 10 ³ poise at a velocity gradient of 5.6 to ¹ and 1.0 x 10 ³ to 2 in a gradient of ^{'the first} The viscosity of the polymethyl methacrylate, measured at 200 ° C, is 11.0 x 10 ³ Pa.s at a speed gradient of 5.6 s ^-1 and 1.4 x 10 ³ Pa.s at a gradient of 2 s ^-1 .

Finally, the viscosity of the polyvinylidene fluoride, measured at 200 ° C, is 14.1 x 10 ³ Pa.s, and 0.88 x 10 ³ Pa.s at a speed of 3.5 s ^{-1: 1} , respectively. 354 s ¹ .

The temperatures at which the extruders are heated range from 190 to 210 ° C for acrylonitrile-butadiene-styrene copolymer, from 180 to <200 ° C for polymethyl methacrylate and from 180 to 220 ° C for polyvinylidene fluoride.

The temperature of the flow distributor and extrusion die is 210 ° C. The leaf comes between the brewing calender _? heated to 80 ° C.

The total amount of material produced is approximately 300 kg / h. The amount, as supplied by the three extruders, is regulated so as to obtain a final composite material containing acrylonitrile-butadiene copolymer, 4 mm thick polymethyl methacrylate in a thickness of 30, and polyvinylidene fluoride in a thickness of 100 _(m. The three. Layers are to each other perfectly fused already Upon cooling, a composite material of a homogeneous composition is obtained, one surface of which consists of polyvinylidene fluoride, while the other consists of acrylonitrile butadiene styrene copolymer.

Example 2

Using a flow distributor to obtain a five-layer material at the exit of the extruder die, the procedure described in Example 1 is repeated to obtain - using the same polymers and the same extruders heated to the same temperatures - a combined sheet consisting of a 75 μπι layer of polyvinylidene difluoride, a 50 μΐη layer of polymethyl acrylate, a 3 mm acrylonitrile-butadiene-styrene copolymer layer, a 50 μΐη layer of polymethyl methacrylate and a 75 μp layer of polyvinylidene fluoride. The produced composite material consists of five layers, which are perfectly matched to each other. Upon cooling, a combined homogeneous composite material having both outer surfaces of polyvinylidene fluoride is obtained, while its center consists of acrylonitrile-butadiene-styrene copolymer.

Example 3

For extrusion of polyvinyl chloride (EKAVYL SL 66) a twin screw extruder KESTERMANN К 107 is used, for extrusion of polymethyl methacrylate (RESARITE KOX 125) an extruder STMP with a diameter of 30 mm is used and extrusion of polyvinylidene fluoride (FORAFLON 4000 HDU) 40 mm.

Of these three extruders, the individual streams go to a flow distributor which is rigidly connected to the tube extrusion head. The equipment is complemented by a conventional vacuum forming machine and a drawing line.

The three polymers are coextruded at their normal extrusion temperatures, i.e. 160-200 ° C for polyvinyl chloride, 180-200 ° C for polymethyl methacrylate, and 180-200 ° C for polyvinylidene fluoride. The temperature of the extruder head and the flow distributor is maintained at between 195 and 200 ° C.

The product is a tube with an external diameter of 50 mm formed from a layer of polyvinylchloride having a thickness of approximately 3 mm, the layer po219907 lymethylinethakrylátu a thickness of approximately 50 microns sebum inner layer ^yp ol ^y ks ^Yli denfluoridu of Houbce ^at BLI ^from NE ^{75 μ ΐη} respectively. The three polymers are in the form of a combined material with a homogeneous uniform composition.

Example. 4

All three extruders of Example 3, terminated with a flow distributor and a tube extrusion head, were used. The apparatus also includes a conventional bottle making apparatus by extrusion and blow molding, by which the three polymers can be coextruded and blown together.

In the first extruder is introduced in polyvinyl chloride [EKAVYL SK 55B] ^d of the second polymethylmethacrylate (Presario KOX 125) into the third and polyvinylidene fluoride (FORAFLON 1 000 HD). The temperatures in each extruder, respectively, are: 160 to 180 ° C, 180 to 190 ° C, and 190 to 200 ° C; the flow distributor and outlet nozzle are maintained at 190 ° C.

^{Zi 'KA} together with the pushing ^{and y b} ANTOM ^{(Pla d} foxes), which is the usual way to obtain a blown bottle. The three extruders are connected to the branched ^d ec ^p rou ^Importan so that the manufactured bottle having an inner layer of polyvinyltáenfluortou a thickness ^ ce ^{EXAMPLE IBL} cut through 100, am, an intermediate layer of polymethyl methacrylate having a thickness approximately 80 μΐη and ^outer layer of ^p ol vin ^{y y} c ^hl or CS ^id ^ ce thickness of approximately 0.8 mm.

The three layers of the bottle produced are perfectly aligned with each other as they exit the extrusion head. After cooling, the bottle has the appearance of a combined material with a homogeneous uniform composition.

Example 5

Working with three extruders (SMTP - KAUFMAN), the first O · ¹²⁰ mm in diameter and with šnetom o ^del CE equal to ^E 33násobku diameter, provided with a degassing device, is used for extruding akrytomtrllMuaadien-styrene copolymer, the second diameter (50 mm Super xx 2 50) for a mixture of 40 parts by weight of polymethyl methacrylate with 30 parts by weight of polyvinylidene fluoride and 30 parts by weight akrylonitrll ^buaa-d ien-styгenol tion copolymer and a third diameter of 40 mm for extrusion of polyvinylidene fluoride.

These three extruders supply power to a single cylindrical enclosure Prou ^d s ^P Ojen ^eh about to b ^Ez Nou straight expressive nozzle to produce sheets with a thickness at approximately the 4 mm, followed by a calender and the normal of ^dt ahovac ^s hnto spectacle during ^{characterized} Uačov ^ desek.

And ^the rylonitrile-buaadiene-styrene copolymer is UGIKRAL SF 10 436, the polymethylmacrylate is ALTULITE 2710 and the polyvinylidene fluoride is FORAFLON 1000 HD.

Viscosity akrylomarll ^{buaacΓen-to-sayee.nového -p} o ^ly mers, measurement ^and e pn ^pl OA ^{of 220} ° C = ^{7. 5} x 1 ° ^P and ^BC i ^{g d} r ient rate of ^5, 6 ^_1 and 1.0 x ^{103 p} as suits. ^g ra ^di entu 2 s “ ¹ . ^{In the} Ozitech polymeahylmeahakrylátu is measured at ²⁰⁰ ° C is ^1.0 x 10 l at ^{3 g} Radient ^{fifth 6 '1} and ^1.4 x ^{103 p} and p ^{s g} ra ^di ent ² s ^-1.

^The onečn ^s vfetoztta ^p ol ^y vin ^Yli day uori ^{d fl} u measurements ^and te ^pl OTE ²⁰⁰ ° C is ^14.1 × 10 ³ and ^0.88 x ^{103 g of p} and r pn ^di ec en ^{t h} c r ^{y h} losai ^3, 5 resp. ³⁵⁴ s ^-1 .

The temperatures to which the extruders are heated in the range 190-210 ° C, u ^k r ^y loniirll-buaa ^d ien-Si ^y renového copolymer between 180 · 200 ° C in a mixture containing by polymerase ahylmethakrylát and 180 up to 220 ° C for polyvinylidene fluoride.

The temperature of the flow distributor and extrusion die is 210 ° C. The calender rolls are maintained at 80 ° C.

Tilt processing ^e · ^LeVeLs SIV ^Imin approximately 300 kg / h. The amount discharged from jednoaUvýc ^hr extrusion Saroja to-regulating ^s to obtain the ^final Nu coform material comprising akryloniaril butadiene slyrenový a copolymer, the thickness ^ ce ^{4 mm,} a composition comprising POLYMET ^ t ^ h ^ lm ^ t ^ l ^ h ^ l. iylate in a thickness of 30 μΐη and polyvinylidene fluoride in a thickness of 100 дш. The three layers are perfectly aligned with each other as they exit the extrusion die. After cooling, a combined material of homogeneous structure is obtained, one surface of which is made of polyvinylidene fluoride, the other of which is an acrylonitrile-1-butadiene-styrene copolymer.

Example 6

Using conditions described in Example 5 except that a mixture containing polymeahylmethakrylát using a mixture consisting of 30 parts by weight of polymethyl methacrylate (Presario KOS 125), 40 ^h mot: nose .níc ^h ^ ^p ol ^y days and ^{the y} r ^h nominal O · (tenvátu (Acryloid KM 323b) and 30 parts by weight of ^y acre lonitrll ^{buaadien-y-St} copolymer renového (UGIKRAL SF 10436).

A composite material of a homogeneous composition is obtained, the layers of which are perfectly matched to each other as they exit the extrusion die, and whose one surface is made of polyvinylidene fluoride and the other consists of an acrylomarllbuaadienstyrene copolymer.

Claims (3)

Combined ternary material consisting of one outer layer of polyvinylidene fluoride and another non-polyvinylidene fluoride-bonded thermoplastic polymer layer, characterized in that the intermediate tie layer is a C 1 -C 3 polyalkyl methacrylate, alone or in combination with another a thermoplastic polymer which is present in an amount of at most 30% by weight. 2. The composite material of claim 1, wherein the other thermoplastic polymer optionally used in combination with the polyalkyl methacrylate is a polymer selected from the group consisting of fluorinated thermoplastics, chlorinated vinyl polymers, styrene polymers, polycarbonates, polyurethanes, poly (ester-ethers). , styrene-acrylonitrile copolymers and grafted acrylic elastomer, acrylonitrile-copolymers of tadiene and styrene, polyacrylic esters, copolymers of acrylic esters with vinyl derivatives, and copolymers of methyl methacrylate with vinyl chloride, vinyl acetate, methyl acrylate, acrylonitrile, acrylonitrile, styrene, acrylene, styrene, acrylene, styrene, acrylonitrile. A process for the production of a composite material consisting of a polyvinylidene fluoride and a non-polyvinylidene fluoride-bonded thermoplastic polymer, characterized in that polyvinylidene fluoride, polyalkyl methacrylate and a polyvinyl-bonded thermoplastic polymer are coextruded. the polyalkyl methacrylate serves as an intermediate binder and the streams of all three components are connected to each other at the end of the extruder at the end of the extruder maintained at a temperature in the range of 180 to 280 ° C.