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Paper machine clothing with auxetic fibers and/or yarns

a technology of auxetic fibers and/or yarns, applied in the field of clothing, can solve the problems of affecting the performance and subsequent life of the press fabric, the quality of the paper sheet, and the bath fiber is exposed to “pulling” or tension forces, and achieves the effect of higher tension

Inactive Publication Date: 2008-08-07
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]An advantage of the present invention is that the fibers and / or yarns can be made thicker during operation of the paper machine by applying a higher tension and / or press load to the clothing.
[0012]Another advantage is that when the clothing includes a base layer, the auxetic fibers and / or yarns which are needled to the base layer can be made resistant to shedding because of the auxetic properties.

Problems solved by technology

An issue with this type of press fabric that is under subsequent mechanical action during operation, i.e., during running on the press section of a paper machine, is that the batt fiber is exposed to “pulling” or tension forces.
This fiber shedding is destructive to the performance and subsequent life of the press fabric and also may cause quality problems within the paper sheet due to the presence of unwanted fibers.

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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  • Paper machine clothing with auxetic fibers and/or yarns
  • Paper machine clothing with auxetic fibers and/or yarns
  • Paper machine clothing with auxetic fibers and/or yarns

Examples

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Embodiment Construction

[0020]Referring now to the drawings, and more particularly to FIG. 1, there is shown an embodiment of a paper machine 10 of the present invention, which generally includes rolls 12, 14 and 16 which carry a paper machine clothing 18. Roll 16 is a tension roll which is adjustable as indicated by the double-headed arrow to provide a desired degree of tension on clothing 18. Clothing 18 may be differently configured, depending upon the type of fiber web being produced and the location of clothing 18 along the length of the paper machine, as will be more apparent from the description hereinafter.

[0021]Referring to FIG. 2, a clothing in the form of a press fabric 20 will be described in greater detail. Press fabric 20 generally includes a first base layer 22, a second base layer 24 and batt fiber 26 which is physically and / or chemically coupled, e.g., via needling with at least one of first base layer 22 and second base layer 24. With a conventional press fabric 20, batt fiber 26 includes...

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

A paper machine includes a clothing carried by a plurality of rolls. At least one of the rolls is movable to exert a selected tension load on the clothing. The clothing includes auxetic fibers. By moving one of the rolls to exert a selected tension and / or press load on the clothing, a thickness of the auxetic fibers is modified to become thinner under a lesser load or thicker under a greater load.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to paper machines, and, more particularly, to clothing used in such paper machines.[0003]2. Description of the Related Art[0004]A paper machine includes clothing of various types which is carried by a plurality of rolls throughout the length of the machine. Examples of paper machine clothing include a press fabric, forming fabric, drying fabric and belt, each with its own unique construction and characteristics specific to that portion of the paper machine and the type of fiber web being produced. Each separate clothing is configured in an endless manner to be carried by a corresponding plurality of rolls, and the fiber web is transferred from one clothing to the next throughout the length of the machine. It is known to provide one or more tension rolls within each loop of clothing to keep the clothing under a desired amount of tension.[0005]Press fabrics are typically constructed from a co...

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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IPC IPC(8): D04H1/44
CPCD21F7/083D21F1/0027
Inventor MORTON, ANTONYWALKENHAUS, JOSEF HUBERT
Owner VOITH PATENT GMBH
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