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Impregnated blade coating

A blade and coating technology, which is applied in the direction of scraper, reorganization of coated substances, textiles and papermaking, etc., can solve the problems of unacceptable long life, damage of blade coating, and reduction of paper quality, so as to prevent accumulation and improve Effect of quality, good sliding characteristics

Inactive Publication Date: 2013-10-09
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the wear behavior of this coating under the conditions prevailing in operation does not allow a long life, so the creping blades and scrapers must always be replaced at very short intervals in order to maintain the paper quality
Furthermore, particulates and contaminants on and in the paper web cause localized load peaks on the blade which often lead to damage on the blade coating, thus reducing the quality of the paper produced

Method used

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  • Impregnated blade coating
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Embodiment Construction

[0017] figure 1 shows schematically a cross section through the front region of the creping doctor 10 provided with the coating 12 . The creping doctor 10 has a base body 11 , for example of steel, to which a coating 12 has been applied. The coating 12 occupies at least one portion of the creping blade 10 that is in contact with the drying cylinder or cylinder and with the fibrous mat of the paper web. For better attachment, as in figure 1 As explained in , an intermediate layer 13 may be provided between the coating 12 and the substrate 11 . The working edge 14 with which the creping blade rests on the drying cylinder or cylinder adjoins the introduction surface 15 against which the paper web touches. The introduction face 15 and the working edge 14 are formed on the coating 12 .

[0018] As can be seen in the schematic detail illustration A of the coating 12 in the region of the working edge 14, the coating 12 has two parts, namely the coating formed from the coating bas...

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Abstract

A blade for treating fibrous nonwoven webs having a base body and a coating covering at least a part of the surface of the base body. The coating forms at least that part of the blade surface which is provided to come into contact with the fibrous nonwoven web. At the contact surface, the coating has an open-pored material, the pores of which are filled at least partly with a polymer.

Description

technical field [0001] The present invention relates to a blade of a machine for papermaking, and in particular to the design of a blade for use in the creping and coating of a paper web. Background technique [0002] In order to produce the surface characteristics required for the respective purpose of use of a paper, the fibrous mat produced in the papermaking process, the so-called base paper web, usually has to be subjected to a special treatment. For this purpose, high-quality types of paper are coated and toilet paper is creped. [0003] Papers of this type with a surface structure are produced in the creping process. For this purpose, a blade called a creping doctor is usually placed with its working edge against a drying or Yankee cylinder (a steam-heated cylinder usually several meters in diameter), said blade detaching the paper web from the cylinder. In order to generate the surface structure, the doctor blade has a sliding surface arranged close to its working ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B31F1/14D21F11/14D21G3/00D21H23/24
CPCD21H25/10D21H23/32B31F1/145D21G3/005D21G3/00
Inventor J.安杰勒A.艾特施梅尔
Owner VOITH PATENT GMBH