EP1612329A1 - Roll cover made of fibre reinforced composite material - Google Patents

Abstract

The cover(8) material is based on fibers(5) in a matrix(6) and the compound composition continuously varies depending on the area of the roll surface(14) to which the compound is applied. Fillers(9) of different types may also be included in the composition and the latter and/or the fiber(5) content and/or matrix(6) type and/or filler may continuously vary. Composition may vary in the axial and/or radial(7) direction of the roll body(4) onto which the compound is applied. Fiber type, content and/or diameter and/or length distribution and/or orientation may be varied. At least one fiber type may comprise loose fibers of specific length distribution and/or contains fibers which are randomly embedded in the matrix. Fibers have a length distribution of 1-10mm, preferably 1-3mm and/or more preferably 3-10mm. The matrix can comprise one or more different resin types. Matrix composition can be altered by varying the mixing ratio of at least one resin and/or hardener. Fillers can be used to influence wear resistance and/or viscosity and/or surface tension and/or conductivity. Filler particle size can also be varied. An independent claim is included for a process for manufacturing the claimed roll cover. A compound comprising fibers and a matrix is applied onto specific positions on the roll and the composition of matrix and fibers is varied according to the axial and/or radial position on the roll.. The same step is repeated at different positions on the roll.

Description

The invention relates to a roll cover made of a fiber composite material and a method for its production.

Roll coverings made of fiber composite materials are used in web-processing machines in a variety of ways. The most demanding requirements are placed on elastic calendar covers with regard to compressive stress and dynamic stress on paper machines. These covers are usually constructed of fiber composite material.

Essentially, two methods for applying a fiber reinforcement are known from the prior art.

From WO 94/09208 the so-called lamination process is known in which fiber and / or fabric tapes are applied to a roll body and then connected to one another by means of resins, for example epoxide resins, to form a fiber composite material. In order to meet different requirements, such a roll cover is composed of several differently laminated layers.

As a further application method, the so-called filament winding method is known, in which fiber bundles are wound onto a roll body and then joined together by means of resins to form a fiber composite material.

In the case of the first-mentioned application method, the disadvantage is that the finished roll cover is made up of different layers. The interface between different layers is often here, due to the sudden change in material properties, the starting point for Delaminationserscheinungen in roll cover.

The second application method is not suitable, for example, for the production of wear layers to be brought into contact with the paper web in straighteners, since such roll shells lead to an uneven smoothing of the paper web, since the wound fibers are substantially rectified.

However, a satisfactory smoothing effect can be achieved with applied fibers in the form of random fibers. Thus, it is necessary that the roll covers produced by the filament winding method are additionally provided with one or more laminated layers, which takes over the function of the wear layer. Thus, roller covers are created here, which are composed of several different layers.

Starting from the roller covers known from the prior art, it is the object of the present invention to propose a roller cover and a method for its production, in which the o. Disadvantages are prevented.

The object is achieved by a roll cover with the features of claim 1 and by a method having the features of claim 22.

Advantageous embodiments and further developments of the invention are specified in the subclaims.

The present invention is based on the idea that the load capacity of roll coverings can be increased by inhibiting a step-by-step change in the material properties as a result of the lamination process. Accordingly, the present invention provides a fiber composite roll cover made of a material with a fiber component and with a matrix component in which the material composition of fiber component and matrix component changes quantitatively and qualitatively at least in sections continuously.

In this context, a matrix component is to be understood as meaning the material or the material composition in which other dissolved or undissolved materials are embedded. In the case of the roll cover according to the invention thus the fiber component is embedded in the matrix component.

The invention thus provides, at least in sections, a roll cover without boundary layers, since the material composition of the roll cover changes continuously in sections.

Thus, a roll cover is provided, which has a continuous course of characteristic properties such as, for example, Young's modulus, fracture toughness, abrasion resistance or hardness.

According to a preferred embodiment of the invention, the material of the roll cover has a filler component, wherein the material composition of fiber component and / or matrix component and / or filler component changes continuously at least in sections.

At a roll cover a variety of requirements are made. So it is e.g. often necessary that a roll cover is dimensionally stable and at the same time has a high wear resistance. The dimensional stability is realized here by the radially inward areas. The wear resistance, however, is realized by the radially outward areas.

Furthermore, there are applications in which it makes sense if the roll cover has properties that change in the axial direction of the roll body.

A preferred embodiment of the invention therefore provides that the material composition in the axial direction and / or in the radial direction of the roll cover changes continuously at least in sections.

There are different ways conceivable how the material composition of the roll cover material can change continuously. On the one hand, it is possible for the proportion of the material composition of at least one of the components, namely the fiber component and / or the matrix component and / or the filler component, to change.

Thus, for example, it is possible for the proportion of the fiber component in the radial direction to be reduced from 30% to 5% to the outside, whereas the proportion of the matrix component increases correspondingly while the proportion of the filler component remains the same.

Furthermore, it is conceivable that the composition of one or more of the components changes.

Thus, the fiber component is preferably formed by one or more fiber types.

Here, for example, a change in the composition of the fiber component should be understood to mean that the proportion and / or the diameter and / or the length distribution and / or the orientation of the fibers of at least one fiber type change.

By changing the different proportions of the individual fiber types on the fiber component, a desired property profile of the roll cover can be adjusted depending on the location.

Also, by changing the fiber diameter, the length distribution and the orientation of the fibers, the stability can be influenced location-dependent. For example, the tensile strength is heavily dependent on the orientation of the fibers.

Furthermore, the matrix component preferably comprises one or more resin types and one or more types of curing agents.

Here, for example, a change in the composition of the matrix component should be understood to mean that the mixing ratio of at least one type of resin and / or at least one hardener component in the matrix component changes.

Thus, for example, it is conceivable that the mixing ratio of at least one type of resin changes while maintaining the hardness in the radial direction of the roll cover, in which the proportion of epoxy resin from the interior of the roll cover towards the outside (paper side) of the roll cover from 100% to 0% continuously decreases whereas the proportion of polyurethane resin inversely increases from 0% to 100% in the direction of the outside of the roll cover from the inside of the roll cover. Thus, a roll cover is produced, which has a paper-side wear layer of polyurethane resin and a base layer of epoxy resin, wherein the two layers merge continuously in the radial direction.

In addition, the filler component is preferably formed by one or more types of fillers.

In this case, for example, a change in the composition of the filler component should be understood to mean that the proportion and / or the grain size of at least one filler type changes.

Preferred fiber types include inorganic fibers of glass, metal, ceramic fibers, boron or organic fibers, for example carbon and / or aramid and / or polypropylene or polyester or high-performance thermoplastics such as, for example, PPS or PEEK or PTFE fibers. For example, it is conceivable on the basis of the above statements that, if the fiber component consists of only one type of fiber, the proportion of one fiber type, for example glass fibers, and thus the proportion of the fiber component in the material composition can be changed continuously in the radial direction. Furthermore, it is also possible to increase the proportion of one fiber type in the fiber component and to correspondingly reduce the proportion of another type of fiber in the fiber component while maintaining the proportion of the fiber component in the material composition of fiber component and matrix component.

In order to be able to exert targeted influence on the properties of the roll cover, a preferred embodiment of the invention provides that at least one fiber type is formed by fiber pieces with a defined length distribution, which are not connected to one another before being embedded in the matrix component.

Fiber pieces should be understood in this context that the fibers are not formed as fiber bundles (in contrast to filament winding process) or as fiber mats (in contrast to the lamination process). Rather, pieces of fiber having a defined length distribution prior to embedding in the matrix component are discrete, i.e., loose. unconnected fiber pieces.

In particular for the paper-side surface of the roll cover it is necessary to avoid marking tendencies that this surface is formed by tangled fibers. Accordingly, a preferred embodiment of the invention provides that at least one type of fiber comprises a portion of fiber pieces embedded in an undirected orientation in the matrix component.

A preferred embodiment of the invention provides that at least one fiber type from the range of inorganic and / or organic fibers (elastomer, thermoplastics or thermosets) fiber pieces with a length distribution of 0.1 to 100 mm, preferably from 1 to 30mm, more preferably from 1 up to 3 mm and / or from 3 to 10 mm, preferably fibers of aramid and / or glass and / or carbon.

The types of resins used are preferably elastomeric or thermosetting resins. Accordingly, one embodiment of the invention provides that at least one type of resin is an elastomeric or thermosetting resin (epoxies, cyanate esters, phenolic resins), but also thermoplastic materials (PE, PP, PPS, PEEK, ...) and / or mixtures thereof.

Here, as a duroplastic resin, for example, epoxy resin or cyanate ester resins also phenolic resins may be mentioned. In particular, bisphenol A epoxy resins with amine hardener, wherein the proportions hardener per 100 parts of resin in the range 0 to 300 parts (eg Ancamine 2390 [Air Products] 107 parts), but especially 5 to 40 parts, particularly preferably 5 to 25 parts. However, the crosslinking can also be prepared by catalysts that crosslink the epoxy resin three-dimensionally without curing agents. Further, as the elastomeric resins, polyurethane resin or rubber is used.

For example, in order to be able to influence the properties of the paper-side wear layer in a targeted manner, preferred embodiments of the invention provide for use as fillers wear-reducing fillers and / or fillers influencing the viscosity and / or fillers influencing the surface tension and / or fillers influencing the conductivity.

Carbide or metals or oxides such as, for example, Cr, Fe, Al or their oxides are preferably used as wear-reducing filler types, in a range from 0 to 100% by weight, in particular in a range from 10 to 60% by weight. %, more preferably in a range of 20 to 50 wt.%.

Thermoplastics or ionic fillers are preferably used as fillers influencing the surface tension, in a range from 0 to 60% by weight, in particular 5 to 20% by weight, to achieve a surface tension of 20 to 70mN / m, preferably 25 to 56mN / m. more preferably from 25 to 48mN / m.

Furthermore, the filler types may have a grain size in the nanometer and / or micrometer and / or millimeter range, i. Filler types are conceivable which only have particle sizes in the nanometer range as well as filler types which have a particle size distribution from the nanometer range to the millimeter range.

• Aufbringen der Faserkomponente und der Matrixkomponente an einem bestimmten Ort auf dem Walzenkörper, wobei die quantitative und qualitative Materialzusammensetzung aus Faserkomponente und Matrixkomponente abhängig von der axialen und / oder radialen Position des Auftragsorts auf dem Walzenkörper ist,
• Wiederholen der vorgenannten Schritte an einem anderen Ort des Walzenkörpers.

According to the inventive method for producing a fiber composite - roll cover on a roll body, wherein the material of the roll cover comprises a fiber component and a matrix component, the following steps are provided,

• Applying the fiber component and the matrix component at a specific location on the roll body, wherein the quantitative and qualitative material composition of fiber component and matrix component is dependent on the axial and / or radial position of the application location on the roll body,
• Repeating the aforementioned steps at a different location of the roll body.

An embodiment of the method according to the invention provides that a filler component is likewise applied with the fiber component and the matrix component.

Particularly simply and effectively, a continuous change of the fiber component can be adjusted if the fiber component is formed by one or more fiber types, wherein prior to application of the fiber component at least one fiber type loose fiber pieces are produced with a defined length distribution. Furthermore, it is particularly easy to distribute the loose fiber pieces with a defined length distribution undirected, whereby the roll cover on the one hand has a lower tendency to mark and on the other hand in all directions of the layer in which the loose fibers are arranged has an equal stability.

The process according to the invention is particularly simple and cost-effective if the fiber component and / or the matrix component and / or the filler component are applied by an injection process; An application by combining syringes and sprinkling of the fillers is also possible.

According to one embodiment of the invention, the composition and / or the proportion of the applied fiber component and / or the applied matrix component and / or the applied filler component is dependent on the axial and / or radial position of the application location on the roll body.

A concrete embodiment of the method provides that the material of the roll cover is applied to the roll body with an applicator, wherein the applicator can move in the axial and / or in the radial direction of the roll body.

By moving the applicator in the axial direction of the roller body, the material composition can be adjusted in the axial direction. This can be constant both in the axial direction as well as varüeren. In addition, the feed rate of the application device in the axial direction is included in the application quantity of the application device.

By moving the applicator in the radial direction of the roller body, the distance to the roller body can be adjusted and thus specifically the mixing and the impact density, for example, the fiber component, the matrix component or the filler component can be controlled.

A preferred embodiment of the invention provides that the roller body rotates during application about its axial axis, whereby a uniform thickness in the circumferential direction of the roll cover can be produced. Here, the peripheral speed of the roller body is an important factor for the order quantity.

According to a preferred embodiment of the invention, a plurality of application devices are provided, which are arranged, for example, in the circumferential direction at different positions. With this configuration, it is possible to further improve the continuous blending of fiber component, matrix component and filler component.

According to a further embodiment of the method according to the invention, the roll cover is applied in one layer or in several layers.

In order to remove gases trapped in the roll cover during the application process, a particularly preferred development of the method according to the invention provides that the roll cover is cured in a pressurized or overpressure atmosphere. As a result, for example, during the gelling phase and the subsequent curing process, the air released from the fiber composite material can be sucked through the negative pressure, whereby a bubble-free and pore-free roll cover can be produced. Likewise, curing by means of electromagnetic radiation such as UV light or microwaves is possible.

• Figur 1 eine Walze mit Walzenkörper und erfindungsgemäßem Walzenbezug in Seitenansicht,
• Figur 2 eine Vorrichtung zur Durchführung des erfindungsgemäßen Herstellungsverfahrens,
• Figur 3 eine Vorrichtung zur Durchführung des erfindungsgemäßen Herstellungsverfahrens mit mehreren Auftragsvorrichtungen.

The invention will be explained in more detail below with reference to the following diagrammatic drawings, which are not to scale. Show it:

• 1 shows a roller with roller body and inventive roller cover in side view,
• FIG. 2 shows a device for carrying out the production method according to the invention,
• 3 shows an apparatus for carrying out the production method according to the invention with a plurality of application devices.

FIG. 1 shows a roll 1 with a roll cover 8 according to the invention in side view. The roll cover according to the invention was applied to a roll body 4 by the method according to the invention.

The roll cover 8 has a roll side 2 and a paper or wear side 3. The roll cover 8 is applied to the roll side 2 on the lateral surface 14 of the roller body 4 and connected thereto. The roll cover 8 has a fiber component 5, a matrix component 6 and a filler component 9, wherein the fiber component 5 and the filler component 9 are embedded in the matrix component 6.

According to the invention, the material composition of the roll cover 8, consisting of fiber component 5, matrix component 6 and filler component 9, changes continuously in the radial direction 7 of the roll 1.

In the present exemplary embodiment, the fiber component 5 is formed by a single type of fiber, for example in the form of carbon fibers 5. As can be seen from Figure 1, the composition of the fiber component changes continuously in the radial direction 7 of the roll cover 8, in which the proportion of carbon fibers 5 in the material composition of fiber component 5, matrix component 6 and filler component 9 in the radial direction 7 of Roll cover 8 from the roll side 2 to the paper or wear side 3 decreases continuously and by the length distribution of the carbon fibers 5 in the radial direction 7 of the roll cover 8 from the roll side 2 to the paper or wear side 3 decreases continuously.

Further, in the present embodiment, the matrix component 6 is formed by a first matrix type 10 (shown as a white area) and a second matrix type 11 (shown as a black round dots).

The first matrix type 10 comprises in the present exemplary embodiment an epoxy resin fraction. The second matrix type 11 comprises in the present embodiment, a polyurethane resin portion.

As can be seen from FIG. 1, the proportion of the first matrix type 10 in the axial direction 7 decreases continuously from the roll side 2 towards the paper or wear side 3. Conversely, the proportion of the second matrix type 11 in the radial direction 7 continuously increases from the roll side 2 towards the paper or wear side 3. Thus, a roll cover 8 is provided which is dimensionally stable and has an abrasion-resistant paper or wear side 3.

The filler component 9 (shown as black squares) is formed in the present embodiment by a wear-reducing filler, for example, in the form of nanoparticles 9 made of aluminum oxide or the like.

As can be seen from FIG. 1, the proportion of nanoparticles 9 in the radial direction 7 increases continuously from the roll side 2 towards the paper or wear side 3.

FIG. 2 shows an arrangement 12 for carrying out the method according to the invention.

The arrangement is essentially formed by the roll body 4 to be coated with a roll jacket 8 and by an applicator device 18, which is spaced apart from it in the radial direction of the roll body 4.

Furthermore, a part of a roll cover 8 already formed on the roll body 4 can be seen. The roller body 4 of the present embodiment is made of a metallic material. It would also be conceivable that the roller body 8 is at least partially made of a composite material.

During the application process, the roller body 4 rotates in the rotational direction 15 about its axial axis of rotation 29 while the applicator 18 moves parallel to the axis of rotation 29 along the direction of movement 16 and optionally additionally can move perpendicular to the axis of rotation 29 along the direction of movement 17.

The application device 18 has an ejection opening 25 for the exit of loose fiber pieces 26 of the fiber component 5 and an outlet opening 28 for the exit of a mixture 27 of the matrix component 6, the filler component 9 and other components such as. A color component and the like. The ejection opening 25 and the outlet opening 28 are set in such a way that the mixture 27 and the loose fiber pieces 26 impinge substantially on the same point of the lateral surface 14 of the roller body 4 and thereby form a fiber composite material. The mixture 27 and the loose fiber pieces 26 are thus applied in an injection process in which the loose fiber pieces 26 are embedded in the mixture 27 of matrix component 6, filler component 9 and color component. An application of individual components by scattering (not shown) is also possible according to the invention.

Furthermore, the application device 18 has a feed device 23 for feeding in the fiber component 5. In the present embodiment, the feed device is designed as a feed opening 23 into which the fiber component 5 is introduced. In the present embodiment, the supplied fiber component 5 is in the form of long fiber strands. Between the feed opening 23 and the discharge opening 25, a crushing device 29 is provided. In the comminuting device 29, the introduced fiber component 5 is comminuted into loose fiber pieces 26 having a defined length distribution.

In addition, the applicator 18 has feed openings 19, 20, 21 and 22 for feeding the matrix component 6, the filler component 9 (also pre-bleached with another component, for example, resin) and the color component. The matrix component 6 typically comprises one or more resin types and one or more types of curing agents. In the present embodiment, the resin type (s) of the application device 18 are supplied via the feed opening 19. Furthermore, the hardener type or types are supplied to the application device 18 via the feed opening 20. The filler component 9 and the color component are supplied to the application device 18 via the feed openings 21 and 22, respectively.

In the applicator 18 itself, the supplied matrix component 6, the filler component 9 and the color component are mixed to form the mixture 27, which is injected via the outlet opening 28 onto the roll body 4 to produce a roll cover 8 according to the invention.

In the production of the fiber composite roll cover 8 on the roll body 4, the loose fiber pieces 26 of the fiber component 5 and the mixture 27 of matrix component 6 and filler component 9 by rotating the roller body 4 and by moving the applicator 18 along the direction of movement 16 at different locations applied to the roll body 4, wherein the composition of loose fiber pieces 26 and mixture 27 and the composition of the loose Fasem 26 and / or the mixture 27 itself is set depending on the axial and / or radial position of the location on the roll body 4 to achieve that the material composition of fiber component 5, matrix component 6 and filler component 9 according to the invention, according to the respective requirements of the roll cover 8, at least in sections continuously changes.

Thus, it is possible that the fiber component 5 is formed by one or more types of fibers, such as glass or carbon or aramid or boron or polypropylene or polyester or PPS or PEEK fibers and / or that the composition the fiber component 5 changes, in which the proportion and / or the diameter and / or the length distribution and / or the orientation of the fiber pieces of at least one fiber type changes. Preferably, the loose fiber pieces have a length distribution of 1 to 10 mm, preferably from 1 to 3 mm and / or from 3 to 10 mm, wherein the length distribution according to the invention depending on the axial and radial position of the location on which these are applied to the roll body 4 may vary or varies.

As already mentioned, the matrix component 6 is formed by one or more resin types and by one or more types of hardeners. As resin types, for example, elastomeric and / or thermoplastic and / or thermosetting resins are conceivable. The composition of the matrix component 6 changes, for example, in that the mixing ratio and the components of at least one type of resin and / or at least one hardener component changes, for example the change from a bisphenol A epoxy resin type to a bisphenol F epoxy resin type and / or a variation of aromatic and / or aliphatic amine hardeners.

Furthermore, the filler component is formed by one or more types of filler, wherein as fillers, for example, wear-reducing fillers and / or viscosity-influencing fillers and / or surface tension influencing fillers and / or conductivity-influencing fillers can be used. As wear-reducing filler types are carbides or metals or oxides such as metal oxides such as Cr oxide, Fe oxide or Al oxide or fiber pulp of carbon and / or aramid and / or glass in the size range of 1 to 1000 .mu.m, preferably 5 to 100 .mu.m conceivable , Thermoplastics or ionic fillers are conceivable as fillers influencing the surface tension. In this case, the composition of the filler component changes, for example, in which the proportion and / or the grain size of at least one filler type changes. Here, at least one type of filler may have a grain size in the nanometer and / or micrometer and / or millimeter range.

Of course, with the method according to the invention, several layers can be produced independently of each other with outer and inner diameters corresponding to one another, which are then connected to one another by means of adhesives or adhesion promoters.

Furthermore, a typical rubber cover can be applied to the fiber composite roll cover 8 according to the invention, which is crosslinked by vulcanization.

FIG. 3 shows a further arrangement 30 for carrying out the method according to the invention.

According to the arrangement shown in FIG. 3, a plurality of application devices 31, 32 and 33 are provided, which are arranged one behind the other in the circumferential direction of the roll body 4 to be coated with a roll cover 8.

LIST OF REFERENCE NUMBERS

1

roller

2

roll side

3

wear side

4

roller body

5

fiber component

6

matrix component

7

radial direction

8th

roll cover

9

filler

10

first matrix type

11

second matrix type

12

Arrangement for carrying out the method according to the invention

14

lateral surface

15

direction of rotation

16

movement direction

17

movement direction

18

applicator

19

feed

20

feed

21

feed

22

feed

23

feed port

25

ejection port

26

loose fiber pieces

27

mixture

28

outlet opening

29

comminution device

30

Arrangement for carrying out the method according to the invention

31

applicator

32

applicator

33

applicator

Claims (32)

Fiber composite - roll cover for use in sheet processing machines, wherein the material of the roll cover comprises a fiber component and a matrix component,
characterized,
that the material composition of fiber component and matrix component changes at least in sections continuously. Fiber composite - roll cover according to claim 1,
characterized,
that the material of the roll cover includes a filler component, wherein the material composition of the fiber component and / or matrix component and / or filler component changes continuously at least in sections. Fiber composite - roll cover according to one of claims 1 to 2,
characterized,
that the composition and / or the proportion of the fiber component and / or the matrix component and / or the filler component changes continuously. Fiber composite - roll cover according to one of claims 1 to 3,
characterized,
that the composition in the axial direction and / or in the radial direction of the roll cover at least in sections continuously changes. Fiber composite - roll cover according to one of claims 1 to 4,
characterized,
that the fiber component is formed by one or more fiber types. Fiber composite - roll cover according to claim 5,
characterized,
that a type of fiber is formed by inorganic fibers, for example, glass, metal, ceramic fibers, boron or organic fibers such as carbon and / or aramid and / or polypropylene or polyester or high-performance thermoplastics such as PPS or PEEK or PTFE fibers. Fiber composite - roll cover according to claim 5 or 6,
characterized,
in that the composition of the fiber component changes, in which the proportion and / or the diameter and / or the length distribution and / or the orientation of the fibers of at least one fiber type changes. Fiber composite - roll cover according to claim 5, 6 or 7,
characterized,
that at least one fiber type is formed by loose pieces of fiber with a defined length distribution, which are not connected to each other before embedding in the matrix component. Fiber composite - roll cover according to one of claims 5 to 8,
characterized,
in that at least one type of fiber has a portion of fiber pieces which are not directionally embedded in the matrix component. Fiber composite - roll cover according to one of claims 5 to 9,
characterized,
in that at least one fiber type has pieces of fiber with a length distribution of 1 to 10 mm, preferably of 1 to 3 mm and / or of 3 to 10 mm. Fiber composite - roll cover according to one of claims 1 to 10,
characterized,
that the matrix component is one or more types of resin and curing agent comprises one or more types. Fiber composite - roll cover according to claim 11,
characterized,
that a type of the same resin is an elastomeric or a thermoset resin (epoxides, cyanate esters, phenolic resins) and / or a thermoplastic material (PE, PP, PPS, PEEK, ...) and / or a mixture thereof. Fiber composite - roll cover according to claim 12,
characterized,
that the duroplastic resin is epoxy resin. Fiber composite - roll cover according to claim 12,
characterized,
that the elastomeric resin is polyurethane resin or rubber. Fiber composite - roll cover according to one of claims 11 to 14,
characterized,
that the composition of the matrix component changes, in which the mixture ratio changes at least a resin types and / or at least one curing agent components. Fiber composite - roll cover according to one of claims 2 to 15,
characterized,
that the filler is formed by one or more types of fillers. Fiber composite - roll cover according to claim 16,
characterized,
in that fillers which reduce wear are wear-reducing fillers and / or fillers influencing the viscosity and / or fillers influencing the surface tension and / or fillers influencing the conductivity are used. Fiber composite - roll cover according to claim 17,
characterized,
that wear-reducing filler types are carbides or metals or oxides or fiber pulp of carbon and / or aramid and / or glass in the size range of 1 to 1000 .mu.m, preferably 5 to 100 .mu.m. Fiber composite - roll cover according to claim 17,
characterized,
that the surface tension affecting filler types are thermoplastics or ionic fillers. Fiber composite - roll cover according to one of claims 17 to 19,
characterized,
that the composition of the filler component changes, in which the content and / or the grain size changes at least one filler type. Fiber composite - roll cover according to one of claims 17 to 20,
characterized,
that at least one Füllstofflyp has a grain size in the nanometer and / or in the micrometer and / or in the millimeter range. Process for producing a fiber composite - roll cover on a roll body, wherein the material of the roll cover comprises a fiber component and a matrix component, with the following steps, Applying the fiber component and the matrix component at a specific location on the roller body, wherein the composition of fiber component and matrix component is dependent on the axial and / or radial position of the location on the roller body, - Repeat the above steps at a different location of the roller body. Method according to claim 22,
characterized,
that with the fiber component and the matrix component also a filler component is applied. Method according to one of claims 22 to 23,
characterized,
in that the fiber component and / or the matrix component and l or the filler component are applied by an injection process. Method according to one of claims 22 to 24,
characterized,
that the composition and / or the content of the fiber component and / or matrix component and / or the Füllstofflcomponente is the location on the roll body depends on the axial and / or radial position, is applied to the. Method according to one of claims 22 to 25,
characterized,
that the material of the roll cover is applied with an application device to the roller body, with the applicator in the axial and / or move in a radial direction of the roll body can. Method according to one of claims 22 to 26,
characterized,
that a plurality of application devices are provided. Method according to one of claims 22 to 27,
characterized,
that the roller body rotates when applied about its axial axis. Method according to one of claims 22 to 28,
characterized,
that the roll cover is applied in one layer or in several layers. Method according to one of claims 22 to 29,
characterized,
that the roll cover is cured in a low or high pressure atmosphere. Method according to one of claims 22 to 30,
characterized,
in that the fiber component is formed by one or more fiber types, fibers of defined lengths being produced in at least one fiber type prior to application of the fiber component. Apparatus for carrying out the method according to one of claims 22 to 31.

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