Paper machine cover

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...

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

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