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Press felt and method for producing the same

A technology for a press felt and a production method, applied in textiles and papermaking, papermaking, papermaking, etc., can solve the problems of high cost and troublesome film production, etc.

Inactive Publication Date: 2011-10-12
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Such films are laborious to produce and therefore expensive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Press felt and method for producing the same
  • Press felt and method for producing the same

Examples

Experimental program
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Effect test

Embodiment Construction

[0042] The press felt 1 has a load-bearing basic structure consisting of a fabric 2 as well as a first 3 and a second nonwoven fiber layer 4 . The first and second nonwoven fiber layers 3, 4 are superimposed on the side 6 of the basic structure 2 directed towards the paper side 5 of the press felt. The fabric 2 is composed of interwoven longitudinal threads 9 and transverse threads 10 . According to the invention, the pattern 7 of polymer pattern elements 8 printed on the first nonwoven fiber layer 3 is arranged between two superimposed nonwoven fiber layers 3 , 4 and partially covers it.

[0043] A further nonwoven fiber layer 11 providing the paper side 5 is arranged above the second nonwoven fiber layer 4 . As shown, the first nonwoven fibrous layer 3 is composed of finer fibers than the second nonwoven fibrous layer 4 .

[0044] When producing the press felt 1 firstly the first nonwoven fiber layer 3 is arranged on the basic structure 2 and combined with the basic struct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a method for producing a press felt for a fiber web producing and / or processing machine. The method according to the invention comprises the following steps: a) making a load-bearing basic structure, which is especially produced of yarn, available, b) making a first and a second non-woven fiber layer available, c) imprinting a polymer material pattern onto the first or second non-woven fiber layer so that the polymer material pattern partially covers the same, d) arranging the first non-woven fiber layer on a side of the basic structure and e) arranging the second non-woven fiber layer on the first non-woven fiber layer in such a manner that the polymer material pattern is arranged between the two non-woven fiber layers. The invention further relates to a press felt produced according to said method.

Description

technical field [0001] The invention relates to a press felt for a paper, board or tissue machine and to a method for producing such a press felt. Background technique [0002] Press felts are usually constructed from a load-bearing basic structure in the form of a knitted or laid fabric and one or more nonwoven fiber layers which are arranged on both sides of the basic structure and are needle-sewn together therewith. [0003] In order to reduce the rewetting of such press felts, it has previously been proposed to place a prefabricated film of polymeric material between two superimposed layers of nonwoven fibers. [0004] The production of such films is complex and therefore expensive. It is therefore desirable to have a press felt which can be produced at low cost. Furthermore, it is desirable to be able to adjust the dewatering performance of the press felt locally in a targeted manner. Contents of the invention [0005] The task of the present invention is to propos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F7/08
CPCD21F7/083Y10T428/24802
Inventor 安德鲁·阿勒姆约翰·杰弗里斯蒂芬·道格拉斯大卫·斯图尔特·庞顿安东尼·莫顿
Owner VOITH PATENT GMBH
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