High density press fabric

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...

Examples

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...

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...

Examples

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...

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