Paper-making-machine fabric and tissue paper produced therewith

• US 20020088596A1
• Filed: 10/04/2001
• Published: 07/11/2002
• Est. Priority Date: 04/20/1999
• Status: Active Grant

• Current Assignee: SCA Hygiene Products GmbH (Essity AB)
• Original Assignee: SCA Hygiene Products GmbH (Essity AB)
• Inventors: Lamb, Hans-Jurgen
• Granted Patent: US 6,592,714 B2
• Time in Patent Office: Days
• US Class Current: 162/100
• CPC Class Codes: D21F 1/0027 Screen-cloths
• CPC Class Codes: D21F 11/006 Making patterned paper
• CPC Class Codes: Y10S 162/902 Woven fabric for papermaking drier section
• CPC Class Codes: Y10S 162/903 Paper forming member, e.g. fourdrinier, sheet forming member
• CPC Class Codes: Y10T 442/3179 Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified

Abstract

The invention relates to a paper machine clothing, notably an air-dry clothing (TAD clothing), in the form of a woven having a weaving design. According to the invention the relative depth of machine clothing cups which are open towards the contact surface of the paper is 20% or more, said relative cup depth being the quotient of the difference between the measurement height for which the bearing percentage is 30% and the measurement for which the bearing percentage is 60% on the one hand, and the sum of the diameters of a warp thread and a weft, on the other hand. The measurement height “0” is the outer limit of the paper machine clothing on the paper contact surface, the bearing percentage is the projected sectional area of the threads of the woven at a given measurement height in relation to the measurement surface, the section areas being parallel to the surface of the clothing. The invention also relates to a tissue paper product which is produced with such a clothing and is especially voluminous in direction Z.

Claims

1. A paper-making-machine fabric, in the form of a woven pattern, such as a through air drying (TAD) fabric, wherein

the relative pocket depth of pockets in the paper-making-machine fabric open towards the paper contact side amounts to 20% or more, where

the relative pocket depth is the quotient of the difference in height between the measuring height at which the bearing-area-percentage is 30% and the measuring height at which the bearing-area-percentage is 60% and the sum of the diameters of a weft wire and a warp wire,

the measuring height “

0”

is the outer limit of the paper-making-machine fabric on the paper contact side,

the bearing-area-percentage is the projected area of the sectional wires of the fabric at a specific measuring height divided by the measuring area wherein the sectional planes are located parallel to the surface of the fabric.

2. The paper-making-machine fabric as set forth in claim 1, characterized in that the relative pocket depth amounts to 24% or more.

3. The paper-making-machine fabric as set forth in claim 1, characterized in that the relative pocket depth amounts to 27% or more.

4. The paper-making-machine fabric as set forth in claim 1, characterized in that the fabric comprises a woven pattern regularly repeated over the surface area.

5. The paper-making-machine fabric as set forth in claim 1, characterized in that the fabric comprises a woven pattern irregularly distributed over the surface area.

6. The paper-making-machine fabric as set forth in claim 1, characterized in that the fabric is single-ply.

7. A tissue-paper product produced with a paper-making-machine fabric as set forth in any of the claims 1 to 6.