Claims
- 1. Thin-walled hollow cylinder made from fibre-reinforced plastics material, comprising at least one layer having fibres with at least one oriented direction of the fibres, the total wall thickness dtot lying in the range from 0.010 to 1 mm, and the ratio dtot/D being ≦0.0025, where D is the diameter (in mm) of the cylinder.
- 2. Cylinder according to claim 1, wherein the total wall thickness is in the range from 0.010 to 0.700 mm.
- 3. Cylinder according to claim 2, wherein the total wall thickness is in the range from 0.020 to 0.300 mm.
- 4. Cylinder according to claim 1, wherein the cylinder comprises a fibre-reinforced layer having fibres with two oriented directions of the fibres.
- 5. Cylinder according to claim 1, wherein an oriented fibre direction lies parallel or perpendicular to the longitudinal axis of the cylinder.
- 6. Cylinder according to claim 1, wherein the cylinder comprises a first layer having fibres in a first oriented direction of the fibres, and a second layer having fibres in a second oriented direction of the fibres, the oriented directions of the fibres not being identical.
- 7. Cylinder according to claim 6, wherein the oriented direction of the fibres of the first layer forms an angle α with the longitudinal axis of the cylinder, and the oriented direction of the fibres of the second layer forms an angle −α with the longitudinal axis of the cylinder.
- 8. Cylinder according to claim 6, wherein the cylinder also comprises a further layer having fibres in a third oriented direction of the fibres, the direction of the fibres running parallel or perpendicular to the longitudinal axis of the cylinder.
- 9. Cylinder according to claim 8, wherein the said further layer is present between the first layer and the second layer.
- 10. Cylinder according to claim 6, wherein first layers having a first oriented direction of the fibres and second layers having a second oriented direction of the fibres alternate with one another.
- 11. Cylinder according to claim 1, wherein the cylinder is of symmetrical structure in the thickness direction, and the oriented direction of the fibres of outermost, first layers forms an angle α with the longitudinal axis of the cylinder, and the oriented direction of second, intermediate layers forms an angle −α with the longitudinal axis of the cylinder.
- 12. Cylinder according to claim 11, wherein the cylinder comprises a further layer having fibres in a third oriented direction of the fibres, which direction of the fibres runs parallel or perpendicular to the longitudinal axis of the cylinder.
- 13. Cylinder according to claim 12, wherein the further layer is arranged between the second, intermediate layers.
- 14. Cylinder according to claim 11, wherein the layer thickness of the outermost, first layers is identical.
- 15. Cylinder according to claim 8, wherein the thickness of the further layer is greater than the thickness of the other layers.
- 16. Cylinder according to claim 1, wherein the fibre-reinforced plastics material consists of unidirectional carbon fibres in an epoxy matrix.
- 17. Cylinder according to claim 1, wherein the cylinder is made from a quasi-isotropic laminate.
- 18. Cylinder according to claim 1, wherein a surface layer which does not contain any fibres is provided on the inside and/or outside of the cylinder.
- 19. Cylinder according to claim 1, wherein the cylinder is seamless.
- 20. Use of a cylinder according to claim 1 as a preform for the production of a printing forme for rotary screen printing, as a sleeve which is to be exchangeably fitted on an air roller for flexographic and offset printing, as a printing forme for gravure printing, as a transfer medium for transferring coatings and inks, as an electroforming mould or as a coating material.
Priority Claims (2)
Number |
Date |
Country |
Kind |
1013763 |
Dec 1999 |
NL |
|
1013328 |
Oct 1999 |
NL |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation application of PCT/NL00/00747 filed Oct. 17, 2000.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/NL00/00747 |
Oct 2000 |
US |
Child |
09829844 |
Apr 2001 |
US |