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Method and device for changing the formation of a paper web

A paper format and paper machine technology, applied in the direction of paper making, paper machine, paper machine wet end, etc., can solve problems such as impact, and achieve the effect of less production process, optimized production process, and good quality

Active Publication Date: 2016-08-31
SIEMENS ENERGY GLOBAL GMBH & CO KG
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Problems solved by technology

Formation however is determined by different parameters which can only be influenced under certain conditions by conventional papermaking methods

Method used

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  • Method and device for changing the formation of a paper web
  • Method and device for changing the formation of a paper web
  • Method and device for changing the formation of a paper web

Examples

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Embodiment Construction

[0033] figure 1 Include sub figure 1 a to 1c, which show the entire sequence of fiber orientations, are enlarged top views of a fiber layer of a still wet paper web being formed. This sequence illustrates the variation of the orientation of the fibers 3 in the paper web as it passes through the device for varying the formation of the paper fibers in the paper web.

[0034] figure 1 a shows an initial state in which the main orientation of the paper fibers 3 in the fiber layer being formed is along the direction of movement 21 of the screen. This initial state of markedly anisotropic fiber orientation is usually due to the layout and high screen speeds of the screens in industrial paper machines. The original orientation of the fibers 3 is along the screen movement direction 21 , as it is given by the fiber material coiled up on the screen moving in the screen movement direction 21 .

[0035] figure 1 b shows the state formed just after discharge along the discharge channe...

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Abstract

The invention relates to a method and a device for changing the orientation of paper fibers (3) in a paper web, and to a paper machine with such a device. A still damp paper web is formed by applying an aqueous suspension of paper fibers (3) to the screen. At least one electrical discharge is generated through the still wet paper web and / or from the surface of the paper web (9).

Description

technical field [0001] The invention relates to a method for modifying the formation of paper fibers in a paper web, a device for carrying out the method and a paper machine with such a device. Background technique [0002] Sheet forming is an important process during papermaking. For this purpose, a suspension consisting of paper fibers, auxiliary material and water, which is distributed as uniformly as possible over the width of the paper web, is fed to a sheet forming device, for example the screen section of an industrial paper machine. In fourdrinier paper machines, for example, the fiber suspension flows on an endlessly encircling screen. [0003] The quality of the paper is also determined by the so-called formation, ie the arrangement, orientation and distribution of the fibers in the paper. Usually, due to the layout of the screen in an industrial paper machine and the high screen speed, the paper fibers of the paper are mostly along the direction of motion of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/00
CPCD21F1/009
Inventor 维尔纳·哈特曼马蒂亚斯·伊尔斯托费尔赫尔曼·施瓦茨格奥尔格·舍勒尔阿尔布雷希特·西贝尔
Owner SIEMENS ENERGY GLOBAL GMBH & CO KG
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