Press section of a machine for producing a fibrous web and method for producing a fibrous web

A press section, fiber web technology, applied in the press section, paper machine, papermaking, etc., can solve the problems of poor web running, tearing, unusable, etc., achieve low felt cost, improve dehydration, and save driving energy.

Active Publication Date: 2013-11-06
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course in the case of other kinds of paper formed from fibers that are not easily dewatered, a press section with only one single press nip according to the prior art cannot achieve sufficient dewatering and is therefore not usable
Too low dryness after pressing leads to poor web run and frequent tearing

Method used

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  • Press section of a machine for producing a fibrous web and method for producing a fibrous web
  • Press section of a machine for producing a fibrous web and method for producing a fibrous web
  • Press section of a machine for producing a fibrous web and method for producing a fibrous web

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Embodiment Construction

[0032] figure 1 The structure of a possible felt 5.1 is shown in cross section. The basic structure 12 here consists of two layers 12.1 and 12.2, wherein in one layer, namely layer 12.1, the threads are oriented in the web running direction 1a and wherein in this case both layers consist of monofilament threads (20 and 20.1) form. The scrim layer 13 is arranged as an intermediate layer between the substructure layers. In this case, the scrim layer 12 can consist of one or more layers. Generally, the weight of the thick non-woven fabric layer 13 is at 100g / m 2 up to 600g / m 2 between. The two further nonwoven layers 14 , 15 and the fine nonwoven layer 16 are located on the side facing the fiber web. A nonwoven layer 17 is applied to the running side of the felt. This combination achieves very good dewatering over the entire running time of the felt. So-called fused fibers can be contained in the nonwoven layers 14 , 15 , 17 and / or in the scrim layer 13 , which serve to f...

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PUM

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Abstract

The invention relates to a press section (10) for drying a fibrous web (1), in particular a paper, cardboard, or tissue web, in a machine for producing same, in which only one press nip is provided, wherein the press nip is formed by a shoe press roll (2) and a counter roll (3), and the shoe press roll (2) has a circumferential flexible cylindrical surface (7) and a pressing element (4), which can be pressed onto the cylindrical surface (7) from inside and thus can press the cylindrical surface (7) against the counter roll (3), and wherein the press section (10) comprises a first felt (5, 5.1, 6) having a base structure (12), which has at least one layer (12.1, 12.2) made of only twisted monofilament threads (20, 20.1, 20.2, 20.3, 20.4) and at least one nonwoven layer (12.1, 12.2) comprising a multitude of threads, wherein the threads of the one layer are oriented substantially in the running direction of the web.

Description

technical field [0001] The invention relates to a press section for dewatering a fibrous web in a machine for producing a fibrous web, especially a paper, board or tissue web, in which press section only one press nip is provided, wherein The press nip is formed by a shoe press roll and a counter roll with a surrounding flexible jacket and a press element which presses onto the jacket from the inside and can thus press the jacket against the counter roll, and wherein The fibrous web is guided through the press nip together with at least one first felt. [0002] Furthermore, the invention relates to a method for producing a fibrous web, in particular a paper, board or tissue web, by means of such a press section. Background technique [0003] The fiber web is guided through the nip together with the mat or between two mats which themselves circulate endlessly. By means of the pressing force with which the shoe press roll and the counter roll are pressed against each other, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F7/08D21F3/04
CPCD21F3/045D21F7/083
Inventor M.厄克伦兹P.莫德尔D.格罗尼赫
Owner VOITH PATENT GMBH
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