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Seamed press felt with monofilament seam support yarns

A monofilament, seam area technology, applied in the field of seam press felt, can solve the problems of paper cracks, inconsistencies, different air permeability, etc., and achieve the effect of improving seam quality

Pending Publication Date: 2021-05-25
艾斯登强生国际股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems include: differences in the physical properties of the fabric in the seam area leading to different elasticity and different air permeability, which can cause the paper to break due to the lower strength of the paper at the seam mark; and marks on the finished paper
Here, however, the results are no more than inconsistent at best and even leave very perceptible marks on the finished paper being processed / transferred by the press felt

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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  • Seamed press felt with monofilament seam support yarns
  • Seamed press felt with monofilament seam support yarns
  • Seamed press felt with monofilament seam support yarns

Examples

Experimental program
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Effect test

Embodiment Construction

[0040] The use of certain terms in the following description is for convenience only and is not limiting. The terms "top", "bottom", "upper" and "lower" designate directions in the figures referred to. The terms "inner" and "outer" refer to an orientation in or out of the two base fabrics. A reference to a list of items enumerated as "at least one of a, b, or c" (where a, b, or c represents the listed items) means any single item of items a, b, or c or their combination. "A" means one or more of the indicated item. "MD" refers to the machine direction in a paper machine from the headbox to the dryer section, and is the machine direction of the press felt. "CD" means cross-machine direction, or the direction in the plane of the fabric perpendicular to the machine direction. The term "PS" refers to the paper side surface of the fabric, which is the surface on which the paper product is carried through the paper machine. "MS" refers to the machine side of the fabric and is t...

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Abstract

A seamed press felt formed from a base fabric having a CD width and a MD length with two opposing MD ends that are joined to form a continuous belt. MD oriented yarns form uniform loops at the two opposing MD ends that are interdigitated to define a pintle channel extending across the CD width. CD oriented yarns are connected to the MD oriented yarns, in a woven or nonwoven construction. Loop open spaces are located within the loops on each of the two opposing MD ends in a seam region, with the loop open spaces being defined between a last one of the CD yams at each of the two opposing MD ends and the pintle channel. At least one CD monofilament support yarn is located in the loop open spaces on each of the two opposing MD ends. A pintle extends through the pintle channel to form a seam.

Description

[0001] Cross References to Related Patent Applications [0002] The following document is incorporated herein by reference as if fully set forth: U.S. Provisional Patent Application No. 62 / 711,806, filed July 30, 2018. technical field [0003] The present invention relates generally to slotted press felts for use in the production of paper and similar products in paper machines or similar machines. It relates in particular to seams of helically wound multiaxial press felts formed from four layers. The novel construction helps reduce sheet marking at seams. Background technique [0004] The present invention relates to a press felt used in the press section of a paper machine. In the production of said paper products, a stock slurry consisting of about 1% of papermaking fibers and other solids dispersed in about 99% of water is conveyed from the headbox slice to the bottom of the paper machine at high speed and with precision. On fast-moving forming fabrics in the forming ...

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): D21F1/00D21F1/12D21F7/00D21F7/08D21F7/10
CPCD21F7/10D21F7/083
Inventor 布兰特·斯韦恩盖瑞·林斯坦约翰·史奈德约翰·许瑞克·菲力浦斯
Owner 艾斯登强生国际股份有限公司
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