Method and apparatus for treating a fibre web

A fiber web and equipment technology, applied in the field of fiber web processing, can solve problems such as difficult to control pits, and achieve the effect of avoiding web damage and leakage

Inactive Publication Date: 2009-07-01
VALMET CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can also determine the dimple with a certain accuracy, it is difficult to control the dimple before the nip ev...

Method used

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  • Method and apparatus for treating a fibre web
  • Method and apparatus for treating a fibre web
  • Method and apparatus for treating a fibre web

Examples

Experimental program
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Embodiment Construction

[0019] exist figure 1 In , a gluing station according to the invention is shown deployed in a production line. In the direction of movement of the web 1 , the first component is the dryer group 2 from which the web 1 is led directly to the coating device 3 . The coating apparatus 3 is followed by a press roll 4 and an air dryer 5 from which the web is led on for further processing. Between the dryer group 2 and the coating device 3 is a measuring instrument 6 for monitoring the web 1 .

[0020]The coating apparatus 3 comprises a press roll 8 supported by bearings on a frame 7, said press roll forming a nip through which the treated web 1 passes. The press roll 8 and the frame 7 can be part of a conventional film transfer coating device, so in this solution the coating device corresponds to a film transfer coating device from which the press roll 8 of the coating device can transfer the coating. Remove from cloth equipment. The web 1 is guided to run directly down to a pres...

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PUM

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Abstract

In the method, the web (1) to be treated is directed to run from a press nip (8) and treatment mixture is pressed into the web at this nip of rolls (8). The treatment mixture is distributed prior to directing the web into the nip from the spray nozzles to at least one side of the web (1) in such an amount that in the nip the treatment mixture is still wet. The present invention relates to a method and arrangement for treating a fiber web, the arrangement comprising applying a sizing mixture, a coating or the like treatment mixture onto especially board webs. The invention can also be used for paper webs and other corresponding fiber webs. The arrangement comprises at least one press nip (8), means (1) for directing the web (1) into the press nip (8) and means for distributing the wet treatment mixture so that a pool is formed at least between the nip formed by the means (8) forming the nip and the web (1). It further comprises means (20) for measuring the height of the surface of the pool and means for adjusting the height of the surface for controlling the penetration of the treatment material.

Description

technical field [0001] The present invention relates to a method and an apparatus for treating fibrous webs comprising means for dispensing sizing mixtures, coating materials or similar treating mixtures onto specific paperboard webs. The invention is also applicable to paper webs and other corresponding fibrous webs. [0002] The present application relates to sizing (surface gluing), pigmenting, coating and treating webs by calendering. Hereinafter, the present invention will be described by taking sizing as an example, which is the most preferred embodiment of the present invention. However, the invention can also be applied in other above-mentioned applications. Background technique [0003] Typically, sizing refers to the application of an aqueous mixture of starches to the surface of the board or paper, which is then pressed into the web, for example in the nip between a plurality of rolls. Sizing is also used to increase the strength of the web. Sizing can also im...

Claims

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Application Information

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IPC IPC(8): D21H23/56
CPCD21H23/50D21H23/56D21H23/78
Inventor 保利·屈特宁
Owner VALMET CHINA CO LTD
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