Thin-walled cylinder

FIELD: rigid pipes.

SUBSTANCE: cylinder wall comprises at least one layer made of fibers oriented at least in one direction. The total thickness of the wall dtot ranges from 0.010 mm to 1 mm. The ratio dtot/D ≥ 0.0025.

EFFECT: improved method of manufacturing.

20 cl, 4 dwg

 

The present invention relates to a thin-walled hollow cylinder made of FRP tanks.

Hollow cylinder with a relatively large wall thickness, is used as the drive shaft, is known, for example, from the document DE-A-29 11 167. This known cylinder has a layered structure and contains at least four layers, which contain fiberglass or carbon fiber, oriented at right angles relative to the longitudinal axis of the shaft. In accordance with this publication the inner layer with fibers oriented at an angle of between ±30° to ±50°serves as the main support for the damping effort shift. The first intermediate layer with fibers oriented at an angle from 0° to ±15°, serves to increase the wall thickness to counter the twisting during use. Additional intermediate layer, which contains carbon fibers oriented at an angle from 0° to 15°serves to stiffen the shaft so that it was possible to suppress the normal sound/noise, the source of which is the shaft in the process. Finally, the shaft is provided with the outer with impact resistant protective layer with fibers oriented at an angle of between ±60° to 90°, which also contributes to the resistance the structure of the torsion. The total wall thickness according to the examples is approximately 3.0 mm

In addition, in DE-A-25 20 623 disclosed pipe made of fiber-reinforced materials and intended for use, for example, in the Aeronautics and aerospace devices, which contains many layers, containing, perhaps, but not necessarily, oriented fibers. In EP-A-0 058 783 disclosed a tubular body, which contains many layers of plastic and has the outer finishing layer, such as a mast, in which it is preferable to use a combination of different fibers.

Thin-walled hollow cylinder is described, for example, in NL-A-8802144, with this cylinder is used for the manufacture of printing plates in the form of so-called "electro", and in the cylinder wall with a laser made the perforations in the grid points. This known cylinder made of plastic, to which may be added as solid particles and/or fibers to improve the mechanical stability and strength. Printing plates of this type in the form of galvanization made of plastic, never had commercial success.

In addition to the above use for the manufacture of printed forms as galvanisation, thin-walled hollow cylinder, often made of metal, such as Ni, are also used for other with ucaev use in print, for example, letterpress and gravure printing, in which the relief containing indentations, formed on the outer surface of the cylinder, for example, with a laser, or used as a thin-walled metal supports for printing plates for flexographic printing, which can be mounted on a pneumatic cushion and removed from it. Other applications of thin-walled hollow cylinders of this type include, in particular, their use as a means of transfer for the transfer of coatings and paints, as a conductive cylinder used as a mold for electroplating processes, as a material for forming the coating, for example a surface with specific friction properties and slip characteristics, possibly but not necessarily, the slave felling.

In some of these applications it is important to permit the material handling cylinder with a laser, which means that the wall thickness should not exceed a certain upper limit. In addition, in some applications in the printing industry, in which the cylinder is not based on the entire circumferential surface, and only at the ends of the cylinder, for example at the end rings, as well as in other cases of application of the thin-walled cylinder of this type must be hard (in longitudinal direction), especially in t is m case if its length is relatively large, so that the cylinder can be easily manipulated, so it is not prone to damage and that the bending of the cylinder was within acceptable limits.

In addition, it is difficult to ensure installation Nickel cylinders of small diameter without fixation on the rollers, in which the diameter of the cylinder increases with air, for example, such as are used in flexographic printing. In addition, Nickel cylinders of this type, having a small diameter, relatively difficult to produce. In addition, thin-walled Nickel cylinders are prone to wrinkling. However, the cylinders with greater wall thickness and, therefore, less prone to wrinkling, are expensive and difficult to install without the dock.

Thin-walled metal cylinders are often transported and stored at the compression of the cylinders together in oval-curved form. However, this is possible only starting from a certain diameter.

Therefore, there is a continuing need in the cylinders with properties that are superior for a given application, transport and (temporary) storage.

As already proposed in accordance with NL-A-8802144, plastics can generally be made more mechanically stable by the addition of fillers and/or fibers. On the however, this report does not describe anything that could answer the question, how can be achieved given the increased mechanical stability.

It should be noted that, in US-A-3 981 237 disclosed screen mesh for rotary screen printing, made of plastic, such as a complex polyester. Plastic can be filled with a reinforcing filler such as glass fiber. This screen mesh for rotary screen printing are manufactured from a tubular preform, which is obtained by using conventional methods of extrusion and then stretch along the two axes. These filling materials are stapulionis fiber (short cut), which are distributed in the plastic randomly, even after stretching along two axes. Accordingly, the volume concentration of fibers is a maximum of 40%. However, the strength and rigidity of the grid, made so, leave much to be desired. In the tubular workpiece can be made of punched holes using laser radiation in order to form the holes of the grid.

In addition, it should be noted that JP-A-11 278817 disclosed a cylindrical structure made of a material which is reinforced with carbon fiber. This cylindrical design has a relatively large wall thickness with regard to its use as an insulating cylinder which echoes in the device for the production of silicon single crystals by the Czochralski method.

In other publications, mentioned above, discloses a hollow cylinder with walls having a relatively large thickness, which is not suitable for the above applications.

In accordance with the prior art generally believed that it is impossible to produce hollow cylinders of fiber with a relatively large diameter and a small thickness (about 1 mm), which however would have required mechanical and chemical properties for the above applications.

In addition, it is known that under load plastics deform more easily in comparison with metals such as Nickel, as a result of creep.

The purpose of this application is to develop a thin-walled hollow cylinder made of a fiber, in which the wall thickness of the cylinder is such that it can be processed as an intermediate product by using high energy radiation, while the rigidity is certainly sufficient for numerous other applications, and the cylinder is used with possible, but optional, support and/or possibly, but not necessarily, with rotation.

Another object of the invention is to develop a thin-walled hollow cylinder of this type, made from a fiber of this type, the mechanical properties of which are improved. is in printed form, made of fiber reinforced plastic that is described in the aforementioned NL 8802144.

In accordance with the invention offers a thin-walled hollow cylinder made of fiber, containing at least one layer having fibers with at least one direction of orientation of the fibers, with a total thickness of dtotwall being in the range from 0,010 up to 1 mm (10 to 1000 μm and a ratio of dtot/D, constituting ≤0,0025, where D represents the diameter (in mm) of the cylinder. According to the invention was proven ability to create tubes with very thin walls, namely the maximum wall thickness, component 1 mm, which may have a continuous outer surface, which can be made smooth, and which can be obtained with precise dimensional tolerances, and which requires little material. In addition it should be noted that in many cases there will be no need for additional mechanical processing.

Preferably the total thickness of dtotwall is in the range from 0,010 to 0,700 mm, more preferably in the range from 0.020 0,300 mm

For example, when the thickness of the wall part 80 μm, the minimum diameter is 32 mm, and the wall thickness, component 1000 μm, the minimum diameter of the cylinder is equal to 400 mm Cylinder FAV which is preferably round in cross section and has a ratio D/L < 1, where L is the length of cylinder (mm).

Cylinder low weight according to the invention highly suitable for use as a mounted sleeve on rapidly rotating roller or roller, such as roller for offset printing (speed (1000 rpm), without derailing this with bore liner with the roller by the action of centrifugal force. By proper choice of plastic(s) and type(s) of the fibers, which have no yield point or have a high yield strength, it is possible to make the cylinders that are not prone to wrinkling. Compared with metal, in particular Nickel, plastics, as a rule, are more corrosion resistant and better able to withstand exposure to chemicals, which is preferable, if the cylinder according to the invention is used in aggressive environments, such as those that exist when printing. When the ratio of wall thickness to diameter, which is defined above, can be easily transported and stored lots of cylinders according to the invention, which is not currently used in oval-curved in form. The cylinders can be easily manufactured without seams, so they will not have discontinuities due to the weld seam. Operations such as cutting and punching of holes, easy to perform, cylinders according to the invention in comparison with the execution of such operations is th for metal cylinders.

One layer of plastic with the fibers entered into it, which is oriented in the same direction (they are also referred to below unidirectional fibers)has anisotropic elastic properties, i.e. properties depend on the direction in which a load.

In this description, the fiber is understood to mean a layer of plastic binder, which introduced the reinforcing fibers. In accordance with the invention, these fibers are oriented in the same direction.

It is known that the addition of fibers in General gives increased rigidity of plastics. Fiber can be added in the form of so-called short fibers cut (also known as "stapulionis fiber"), in the form of long fibers, which are randomly distributed in the plastic and in the form of unidirectional fibers. The use of unidirectional fibers in principle provides the greatest rigidity, which can be achieved. In addition, the high fiber content can be achieved in the presence of layers with unidirectional fibers, and therefore, these fibers can be achieved highest modulus of elasticity.

As already mentioned, one plastic layer having unidirectional fibers, has anisotropic elastic properties. According to the invention this anisotropy is used to limit the deformation to the NRA is the making of action of the load, which takes place in various applications. This direction of action of the load and, consequently, the direction of orientation of the fibers of the cylinder may vary for each application, different from the others.

In some cases, use may also be a situation when many loads will act upon the cylinder simultaneously, but in different directions, for example, if the printed form of electro, designed for rotary screen printing, made of a cylinder. Therefore, in accordance with one embodiment of the invention the cylinder according to the invention contains a fibre-reinforced layer having fibers with two different directions of orientation of the fibers, such as woven or braided material of the fibers, the Mat of fibers or fabric fibers.

To reduce the overall degree of bending, in particular in the case of a long cylinder, it is preferable that the direction of orientation of the fibers is parallel to the longitudinal axis of the cylinder, i.e. coincides with the axial direction.

For cylinders, which are mounted on a pneumatic cushion, for example, flexographic printing, the direction of orientation of the fibers is preferably perpendicular to the longitudinal axis of the cylinder.

In accordance with another variant implementation, the value of the printing form according to the invention, the cylinder includes a first layer, having fibers with the first direction of orientation of fibers and a second layer having fibers with a second direction of orientation of the fibers, with the first and second directions of orientation of the fibers are not identical. As already mentioned, the individual layers having unidirectional fibers, may have a high content of fibers (see fiber content, constituting 63 volume percent (vol.%), for unidirectional carbon fiber in epoxy with fiber content, constituting approximately 35 vol.%, for non-woven fabric in epoxy resin), which is preferable for the elastic properties. The fiber content in the cylinder according to the invention preferably exceeds 45 vol.%. The cylinder of this type according to the invention consists at least of two layers of fiber-reinforced materials in which the fibers in one layer are oriented in the same direction and the direction of the fibers are not parallel to each other.

Preferably the direction of orientation of the fibers of the first layer forms an angle α with the longitudinal axis of the cylinder, and the direction of orientation of the fibers of the second layer forms an angle α with the longitudinal axis of the cylinder. The cylinder preferably also contains an additional layer having fibers with a third direction of orientation of the fibers, with the fiber direction of this additional layer is inserted is compulsory or perpendicular to the longitudinal axis of the cylinder. More preferably, if the additional layer is located between the first and second layers.

Examples of angle α are the angles that comprise 0°, 30°, 45° and the corners >60°. Thus, a three-layer laminate designed for use in the cylinder according to the invention, contains 3 layers with different directions of orientation of the fibers, for example, an angle of 0° and ±60°or 0° and ±45°or 0° and 90° (×2) relative to the longitudinal axis of the cylinder, if the cylinder is a template for printing plates for rotary screen printing. Thus, a three-layer laminate designed for use in the cylinder according to the invention as a so-called "shell sleeve for flexographic printing, contains 3 layers with different directions of orientation of the fibers, for example, at an angle of 90° and ±30°or 90° and ±45°or 0°(×2) and 90° relative to the longitudinal axis of the cylinder.

According to another variant implementation of the cylinder in accordance with the invention, the first layers having a first direction of orientation of the fibers, and the second layers having a second direction of orientation of the fibers alternate with each other. One example of a variant of implementation of the cylinder of this type is a cylinder, which is made from chetyrehkolka what about the laminate, in which the direction of orientation of the fibers of the first and third layers and the direction of orientation of the fibers of the second and fourth layers are identical.

In accordance with a particularly preferred embodiment, the cylinder has a symmetrical structure in the thickness direction, and the direction of orientation of the fibers most of the exterior, the first layer forms an angle α with the longitudinal axis of the cylinder, and the direction of orientation of the fibers of the second intermediate layer forms an angle α with the longitudinal axis of the cylinder. In this embodiment, the cylinder is also preferably contains an additional layer having fibers with a third direction of orientation of the fibers, with the direction of orientation of the fibers in parallel or perpendicular to the longitudinal axis of the cylinder. As in the cylinder containing the layer 3, which was discussed above, the additional layer preferably is located between the second intermediate layers, i.e. in the center, when viewed in the direction of the wall thickness of the cylinder.

In the above-described multi-layer laminates, which are used for the manufacture of the cylinder according to the invention and which contain additional layer having fibers with the direction of orientation of the fibers, which is parallel or perpendicular to the longitudinal axis of the cylinder, the thickness of this additional the Loya preferably greater than the thickness of other layers. In this case, the other layers with identical directions of orientation of the fibers generally have an identical thickness of the layers.

Depending on the thickness (diameter) of the fibers and the predetermined final thickness of the cylinder according to the invention, this cylinder may also contain a set of neighboring layers have the same direction of the fibers.

If the cylinder according to the invention are produced printing plate for rotary screen printing, total wall thickness is preferably in the range from 80 to 300 microns. The small thickness of the printing plates of this type also allows you to make holes for printing by using a laser, in accordance with the figure, which should be printed. If the cylinder according to the invention is used as mounted sleeves for flexographic printing, the minimum wall thickness is approximately 0,08 mm For printing labels total wall thickness is preferably in the range from 0.02 to 0.15 mm

Thin-walled cylinder according to the invention can be easily processed with a laser, for example, for the manufacture of printing plates for screen printing. It should be noted that such further processed cylinder can be easily made flat printing plate by cutting a cylinder in the longitudinal direction and mounting a flat grid, the floor is military so on the corresponding flat frame (frame).

The mechanical properties of the printing plates for rotary screen printing, which is made of a cylinder according to the invention, are also good.

Despite the fact that there are preferred directions and materials, the direction of orientation of the fibers, the thickness of layers and the material can vary depending on the final application, as mentioned above and as will be illustrated below in more detail.

If desired, the cylinder according to the invention can be combined layers of material so that they formed quasiisotropic laminate to reduce the anisotropy of a single layer having unidirectional fibers.

As mentioned above, the materials of the fibers and plastic binder matrix can be selected depending on the given properties. Examples of suitable materials fibers include carbon fibers, inorganic fibers such as glass fiber and boron fiber, metal fiber and organic polymer fibers, such as elongated fibers, for example, aramid fiber and fiber from extruded high strength polyethylene, and combinations thereof. Particularly preferred carbon fiber and inorganic fiber, and of these the most preferred carbon fiber. The material used is of the binder is not critical, because he makes a small contribution to the mechanical properties in comparison with the fibers, and may be selected from known thermoplastic resins such as polyester resins and thermosetting plastics such as epoxy resin. Of usual compounds, it is preferable to epoxyacrylate, given the excellent correlation between the production cost and rigidity. The rigidity of this combination is actually twice the stiffness of the fiber-based epoxy resin with filler, representing Kevlar, and three times the stiffness of fiberglass epoxy resin. Other combinations with more high rigidity include polyaminocarboxylic, volokita based on epoxy resin with a filler of graphite fibers and volokita on a ceramic base with a filler made of fibers of silicon carbide. However, these composite materials are expensive. The above-mentioned single-layer industrial materials are produced and are available on the market.

Elastic properties for a number of single-layer combinations of fibers and binder are described, in particular, in the book I.M. Daniel and other "Engineering Mechanics of Composite Materials", Oxford University Press, 1994, and listed below in table 1.

Table 1
Fiber content (% is of total) The modulus of elasticity parallel fibers (HPa)The modulus of elasticity perpendicular to the grain (HPa)The modulus of elasticity shear (SBS)The Poisson's ratio
Composite material based on epoxy resin with a fibrous filler of glass E

(aluminosilicates alkali free glass)
55398,6the 3.80,28
Composite material based on epoxy resin with a fibrous filler of glass S

(heat-resistant magnesium-aluminosilicate glass)
50438,94,50,27
Composite material based on epoxy resin with a fibrous filler of Kevlar60875,52,20,34
Ȋ
Composite material based on peek with filler made of carbon fiber581318,75,00,28
Epoxyacrylate6314210,37,20,27
Polyaminocarboxylic452165,04,50,25
Composite material based on epoxy resin with a filler of graphite fibers572946,44.90,23
Composite material on a ceramic base with

filler made of fibers of silicon carbide
39121112440,20

Elastic properties quasiisotropic laminates are shown below in table 2.

Table 2
The modulus of elasticity (GPA)The modulus of elasticity shear (SBS)The Poisson's ratio
Composite material based on epoxy resin with a fibrous filler of glass E (aluminosilicates alkali free glass)18,97,30,29
Composite material based on epoxy resin with fiber glass aggregate S(heat-resistant magnesium-aluminosilicate glass)20,98,20,27
Composite material based on epoxy resin with a fibrous filler of Kevlar32,612,30,33
Composite material based on peek with filler made of carbon fiber50,719,40,30
Epoxyacrylate56,722,10,29
Polyaminocarboxylic77,429,60,31
Composite material based on epoxy resin with a filler of graphite fibers10439,70,31
Composite material on a ceramic base with a filler made of fibers of silicon carbide11346,40,22

The material layers may, in addition to the above-mentioned binder and unidirectional fibers, optionally also contain other conventional additives such as lubricants, substances that increase the adhesion strength, fillers, pigments, etc.

In addition, if necessary, print the form (cylinder) according to the invention can be performed with one or more surface layers, which contain no fiber and have the specified properties, in particular layers of plastic on the inside and/or outside with the Auron cylinder. Examples of such specified properties are, in particular, reduced friction (due to the use of polytetrafluoroethylene), wear resistance, resistance to scratching, water repellency and durability.

The invention also relates to the use of the cylinder according to the invention as blanks for the manufacture of printing plates for rotary screen printing, as mounted sleeves for flexographic printing and offset printing, which must be installed on the pneumatic cushion, as a printing plate for gravure printing as a means of transfer, intended for transferring coatings and printing inks, as a mold for electroplating processes (galvanotherapy) or as a material for forming the coating.

The invention is explained below with reference to the accompanying drawings, where:

figure 1 shows the schematic representation in isometric printing plates for rotary screen printing, which is made of a cylinder according to the invention;

figure 2 shows a schematic depiction of a layer of fiber having a direction of orientation of the fibers;

figure 3 shows performed with a spatial separation of the elements is a schematic depiction of a symmetric three-layer laminate; and

figure 4 shows performed with a spatial separation of elements, hematine the image of a five-layer laminate.

Figure 1 shows a printing form 10 for rotary screen printing, which is made of thin-walled hollow cylinder 12 according to the invention. This cylinder is made of punched holes in accordance with the figure, which should be printed by use of high energy radiation, for example, with a laser carbon dioxide. In this case, these perforations form a hole 14 for printing, the defining image 16 and 18, which are to be printed. The total thickness of dtotthe cylinder wall is, for example, 140 μm for the diameter D, comprising 203,4 mm, and length L, component 1850 mm

Figure 2 shows a flat layer 20 of the fiber, having a fiber 22 (schematically shown a relatively thin solid lines)when the direction of orientation of these fibers parallel to the longitudinal axis of the cylinder, which should be made of this layer. This axial direction of the fibers is preferable to reduce the overall bending of the printing form 10.

For simplicity, in the following figures, identical elements are denoted by identical reference numbers.

Figure 3 schematically shows a three-layer laminate 30 in which the middle layer 32 with a thickness of 84 μm consists of a layer of fiber, shown in figure 2, i.e. the layer in which the fibers 22 are parallel the longitudinal axis (not shown in figure 3). On both sides of the middle layer 32 has the outer layer 34 with a thickness of 28 μm, the fibers 22 which are oriented in the direction perpendicular to the longitudinal axis. Laminate with unidirectional fibers of this type can be formed, for example, using conventional methods, such as the process of obtaining a uniaxial-oriented fibrous plastic, injection molding, laminating and winding, and may be machined, if necessary, by grinding, polishing, etc. But in most cases, additional machining of this type is unnecessary. Suitable way to get the cylinder according to the invention disclosed in US-A-5 071 506. With this method of composite material onto the mandrel having an inflatable elastic balloon. The mandrel into unilocular the mold. When the pressure in the inflatable elastic balloon composite material is pressed to the wall of the mold. Subsequently, the composite material is cured.

Laminate, in which the Central layer has a direction of orientation of the fibers, which is perpendicular to the longitudinal axis, and the direction of orientation of the fibers of the outer layers, which form an angle of α with the longitudinal axis, where the angle α not equal to 90° angle α preferably 0°used as a BA the new patterns for the manufacture of the cylinder according to the invention, which has a support during use (for example, for the manufacture of shell sleeve for flexographic printing), because in this case it may be less bending and properties in the direction of the tangent are important.

Figure 4 shows a schematical diagram illustrating the multilayer structure of example five-layer laminate 40 according to the invention in a flat view. The laminate 40 symmetric structure contains the middle layer 32 with a thickness of 200 μm, in which the fibers 22 are oriented in the longitudinal direction of the cylinder, which must be made from the laminate. On both sides of the middle layer 32 has two intermediate layer 44 with a thickness of a layer constituting 20 μm, in which the fiber direction forming an angle of α=-70° relative to the longitudinal axis. The outer first layers 46, similarly made with a thickness of 10 μm, have fiber 22, which is oriented at an angle +70° relative to the longitudinal axis. A cylinder with a diameter of 120 mm made of this five-layer laminate.

It should be noted that in practice the choice of the direction of the fibers will partly be determined by the reproducibility of the production technology used and the total cost.

1. Thin-walled hollow cylinder (12)made of a fiber containing at least Odie the layer (20; 32, 34; 32, 44, 46) with fibers (22)having at least one direction of orientation of the fibers, while the total thickness of dtotwall is in the range from 0,010 up to 1 mm and the ratio of dtot/D is ≤ 0,0025, where D represents the diameter (in mm) of the cylinder.

2. Cylinder according to claim 1, characterized in that the fiber content is at least 45 volume percent.

3. The cylinder according to any one of claims 1 and 2, characterized in that the total thickness is in the range from 0,010 to 0,700 mm

4. Cylinder according to claim 3, characterized in that the total thickness is in the range from 0.020 0,300 mm

5. The cylinder according to any one of claims 1 to 4, characterized in that the cylinder (12) contains a fiber reinforced layer having fibers with two directions of orientation of the fibers.

6. The cylinder according to any one of claims 1 to 5, characterized in that the direction of orientation of the fibers is parallel or perpendicular to the longitudinal axis of the cylinder (12).

7. The cylinder according to any one of claims 1 to 4, characterized in that the cylinder (12) includes a first layer having fibers with the first direction of orientation of fibers and a second layer having fibers with a second direction of orientation of the fibers, the direction of orientation of the fibers are not identical.

8. Cylinder according to claim 7, characterized in that the direction of orientation of the fibers of the first layer forms an angle αwith the longitudinal axis of the cylinder (12), and the direction of orientation of the fibers of the second layer forms an angle -α with the longitudinal axis of the cylinder (12).

9. The cylinder according to any one of claims 7 and 8, characterized in that the cylinder (12) also includes an additional layer (32)having a fiber (22) with the third direction of orientation of the fibers, which is parallel or perpendicular to the longitudinal axis of the cylinder (12).

10. Cylinder according to claim 9, characterized in that the additional layer (32) is located between the first layer (34) and second layer (34).

11. The cylinder according to any one of claims 7 to 9, characterized in that the first layers having a first direction of orientation of the fibers, and the second layers having a second direction of orientation of the fibers alternate with each other.

12. The cylinder according to any one of claims 1 to 3, characterized in that the cylinder (12) has a symmetric structure in the thickness direction and the direction of orientation of the fibers most of the exterior, the first layer (46) forms an angle α with the longitudinal axis of the cylinder (12), and the direction of orientation of the fibers of the second, intermediate layer (44) forms the corner -α with the longitudinal axis of the cylinder (12).

13. Cylinder 12, characterized in that it contains an additional layer (32)having a fiber (22) with the third direction of orientation of the fibers, which is parallel or perpendicular to the longitudinal axis of the cylinder (12).

14. Cylinder 13, characterized in that the additional layer 32) is located between the second, intermediate layers (44).

15. The cylinder according to any one of p, 10, 12-14, characterized in that the thickness of most of the exterior, the first layer (46) is the same.

16. The cylinder according to any one of p, 10, 13 and 14, characterized in that the thickness of the additional layer (32) is greater than the thickness of the other layers(34; 44, 46).

17. The cylinder according to any one of claims 1 to 4, characterized in that the fiber is composed of unidirectional carbon fibers in an epoxy matrix.

18. The cylinder according to any one of claims 1 to 3, characterized in that it is made of quasiisotropic laminate.

19. The cylinder according to any one of claims 1 to 17, characterized in that on the inner side and/or outer side of the cylinder (12) has a surface layer that does not contain any fibers.

20. The cylinder according to any one of claims 1 to 19, characterized in that the cylinder (12) is seamless.

21. The cylinder according to any one of claims 1 to 20, characterized in that it is a blank for the manufacture of printing plates for rotary screen printing, with bore liners installed can be replaced with pneumatic roller for flexographic printing and offset printing, the printing plate for gravure printing, transfer, intended for transferring coatings and printing inks, forms for electrotype (galvanotherapy) or to obtain material for forming the coating.



 

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