Paper machine cover

A technology for drying wire and paper machine, applied in paper machine, paper machine, wet end of paper machine, etc., can solve the problems of paper quality loss and falling, and achieve the effect of improving detachment and early detachment

Inactive Publication Date: 2004-11-10
ASTEN PRIVATMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Especially in the case where a web cleaner cannot be installed in this front area of ​​the drying section, in certain cases (depending on the composition of the paper web, the production conditions and the type of dirt particles) larger dirt particles are formed, These particles fall off the surface of the web and cause a loss of quality in the paper based on their larger size

Method used

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Embodiment Construction

[0025] FIG. 1 is a perspective view of a section of flat strip 1 . The ratio of width 2 to thickness 3 of the flat strip is approximately 4:1. The flat belt 1 woven by the extrusion process is flat on one side (surface 4), while the web-contacting surface 5 formed when the belt 1 is formed into a woven drying wire has no texture. regular. This textured surface 5 has an average roughness of 5 μm to 100 μm. Such structures can be formed, for example, by embossing plastic that has not yet fully cured.

[0026] The flat strip 1' shown in FIG. 2 differs from that shown in FIG. 1 in that its surface 5' has a regular structure. The surface 5' has three rows of cylindrical elevations 6 extending parallel in the longitudinal direction. The elevations in the individual rows are equidistant from each other and likewise form rows of elevations in the transverse direction of the flat strip.

[0027] The elevations 6 can also be spherical or rounded in shape.

[0028] The surface 5 ″ ...

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Abstract

In order to prevent the formation and subsequent breaking off of large agglomerations of dirt particles on the cover of a paper machine, at least one surface located opposite the paper web and pertaining to at least one part of the elements forming a contact surface is provided, at least partially, with an average surface roughness of between 5 mu m and 100 mu m.

Description

technical field [0001] The invention relates to a paper machine dryer wire running continuously on a drum for removing moisture from a paper web by heating. Heat penetration, abrasion resistance, air permeability and traction, as well as surface structure are the basic features of such drying wires that impart a sound quality to the dried paper web. Background technique [0002] Generally known, such a drying wire is a flexible sheet-like article, which may be a fabric, a knitted fabric, a spiraled fabric or support segments hinged to one another (usually die-cast). The most common woven dryer fabric is a spiralized fabric. [0003] In the case of the above-mentioned two types of drying wires, the problem of soiling of the contact surface of the drying wire facing the paper web has particularly arisen recently. One cause of the increasing contamination of the dry part of paper machines is the increasing use of used paper in paper production. Since the used paper content i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/00
CPCD21F1/0027Y10T428/24777Y10T428/24355Y10T428/24818Y10T428/2481Y10T428/23964
Inventor 迪特尔·库卡特
Owner ASTEN PRIVATMBH
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