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High density press fabric

Inactive Publication Date: 2008-08-14
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 it significantly reduces the time needed for the running in time of the fabric.
[0012]Another advantage of the present invention is that it reduces initial contamination of the press fabric.
[0013]Yet another advantage of the present invention is that it allows the use of a fine surface batt structure that yields improved paper surface quality and higher dryness.

Problems solved by technology

Varying amounts of water is removed from the slurry through the forming fabric, resulting in the formation of a fibrous web on the surface of the forming fabric.
The running in of the fabric results in lost production time and / or at the very least non-optimal dewatering efficiency of the papermaking machine.
This running in sequence and non-optimal nip dewatering resulting therefrom leads to a condition of increased contamination of the press fabric mainly in the surface batt structure, which leads to an increased flow resistance.

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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  • High density press fabric
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Examples

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Embodiment Construction

[0020]Referring now to the drawings, and more particularly to FIG. 1, there is shown a papermaking machine 10 having a press section 12 that utilizes a press fabric 14. Not all of papermaking machine 10 is illustrated with papermaking machine 10 having a forming section and a drying section in addition to press section 12.

[0021]Now, additionally referring to FIG. 2, there is shown one embodiment of press fabric 14 having a fine layer 16, a batt layer 18, a non-woven component 20, a base fabric 22 and a batt layer 24. Fine layer 16 is a thin layer of fine fabric fibers combined with a polymer reinforcement. Fine layer 16 is so thin that it is no more than 125 g / m2. The polymer reinforcement may be made of polyamide or polyurethane. The fine fibers are finer than 3.1 dtex for a shoe press application used in a press section 12 or finer than 6.7 dtex for roll presses used in a press section 12. Base fabric 22 has a low lateral and transversal Intrinsic Flow Resistance (IFR) of below 12...

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 press fabric for use in a papermaking machine, the press fabric including a base fabric and a layer of fine fibers combined with a polymer reinforcement. The layer being associated with the base fabric. The layer being no more than 125 grams / m2. The press fabric being pre-compacted to a density greater than 750 kg / m3.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a papermaking machine, and, more particularly, to a press fabric utilized by a papermaking machine.[0003]2. Description of the Related Art[0004]In the art of papermaking multiple steps occur from the introduction of a pulp slurry to the production of a finished paper product. The initial introduction of the slurry is that portion of a papermaking machine known as the wet end. Here, the slurry, or fiber suspension, is initially dewatered when the slurry is introduced onto a moving forming fabric, in the forming section of the papermaking machine. Varying amounts of water is removed from the slurry through the forming fabric, resulting in the formation of a fibrous web on the surface of the forming fabric.[0005]The forming fabric addresses the dewatering of the slurry and also sheet formation, which contributes to the sheet quality as the web forms on the forming fabric. The roll of the fo...

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): D03D25/00
CPCD21F7/083
Inventor BURBAUM, RALFCROOK, BOBKLEISER, GEORGLESMEISTER, ACHIMRAGVALD, HANSWALKENHAUS, HUBERT
Owner VOITH PATENT GMBH
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