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Screw winding paperboard core, and producing and using method thereof

A technology of spiral winding and cardboard core, applied in the field of spiral core, improving the rigidity of spiral cardboard core, can solve the problems of limited opportunities, influence, insufficient to solve problems, etc., and achieve the effect of improving economy

Inactive Publication Date: 2004-01-21
实耐格阿尔科尔有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] By optimizing the ratio of cardboard in the machine direction to the cardboard in the cross-machine direction and adjusting the configuration of the helically wound core (winding angle), it is possible to have some influence on the existing situation
However, with conventional board machines and conventional screw machines, the opportunities are rather limited and not enough to solve the problem

Method used

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  • Screw winding paperboard core, and producing and using method thereof
  • Screw winding paperboard core, and producing and using method thereof
  • Screw winding paperboard core, and producing and using method thereof

Examples

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Embodiment Construction

[0042] Attached figure 1 is a graphical representation of the values ​​of the elastic modulus as a function of the winding angle α (mean winding angle) of a core manufactured with a paperboard ply according to the invention, such a core being, for example, a rotogravure printing core for use in In the paper, film and textile industries, the elastic modulus values ​​are compared to corresponding elastic modulus values ​​of prior art conventional cores of higher strength grades. As mentioned above, when the winding angle is about 15-35° which is usually used in the spiral core, the elastic modulus in the cross machine direction has a very important influence on the overall elastic modulus of the finished spiral core. The definition of the paperboard ply winding angle α (average winding angle) relevant to the present invention is expressed in figure 2 middle. Winding angle α (mean winding angle) means the acute angle α between the direction perpendicular to the axis of the pap...

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PUM

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Abstract

A structural ply of a spiral paperboard core has an elasticity modulus E in the cross machine direction (CD) higher than 4500 Mpa, and an elasticity modulus E in the machine direction (MD) higher than 7500 MPa (N / mm2). Such paperboard cores may be manufactured by using, either solely or partly, these structural plies, the paperboard for making up such structural plies having been manufactured by press drying. Paperboard based on the press drying method can be manufactured, e.g., with a board machine employing the Condebelt process. The cores may be used as yarn carriers and as tubes for thin films and foils, which may be wound onto and unwound from the cores at a speed of at least about 200 meters / minute.

Description

technical field [0001] The present invention relates to structural layers of paperboard cores. The invention also relates to a helical core comprising such structural layers. Furthermore, the present invention also relates to a method of improving the stiffness of a spiral paperboard core. Background technique [0002] The spiral cardboard core is composed of many superimposed cardboard layers through winding, bonding and drying. [0003] Roll-to-roll products (WEBS) produced by the paper industry, film industry and textile industry are usually wound on a core for rolling. Cores made of cardboard, in particular spiral cores, are manufactured by gluing cardboard layers one on top of the other and winding them helically on a special screw machine. The width, thickness and number of paperboard layers required to make up the core vary according to the size and strength requirements of the core to be manufactured. Usually, the layer width is 50 to 250 mm (in special cases abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B31C3/00B65H75/10
CPCY10S428/906B65H75/10B31C3/00Y10T428/1303Y10T428/13Y10T428/1317
Inventor J·哈帕尼米M·耶尔维宁
Owner 实耐格阿尔科尔有限公司