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High drainage dimensionally stable brownstock washer belt design

A manufacturing method and technology of a pulp washer, applied in washing/replacing pulp treatment fluid, papermaking, papermaking machines, etc., can solve problems such as yellowing, unusable white paper, and deep pulp color

Inactive Publication Date: 2008-07-30
ALBANY INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The natural color paste thus washed still has a certain degree of brown color, and the remaining pulp is usually too dark to be used for white paper
Also, if any lignin is present, paper made from this pulp is poorly durable and eventually yellows

Method used

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  • High drainage dimensionally stable brownstock washer belt design
  • High drainage dimensionally stable brownstock washer belt design
  • High drainage dimensionally stable brownstock washer belt design

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Embodiment Construction

[0033] In view of the defects existing in the design of the filter belt of the pulp washer, the present invention details a set of fabric design and material selection for the filter belt of the pulp washer, which greatly improves the washing performance of the pulp washer before bleaching. Although the filter belt of the present invention is widely used in pre-bleach washers, it is foreseen that the filter belt is particularly suitable for use in similar Black-Clawson chemical pulp washers. (Black Clawson Chemi-Washer )model.

[0034] The filter belt is made of high-density multi-layer woven fabric. The fabric can be sewn into a loop structure for use as a belt, or woven into a loop. The sutures may embody braided sutures, needle sutures or spiral needle sutures. No matter which method is used, the fabric can provide a high degree of fiber support through high warp density / long warp floating yarns, and at the same time, by increasing the void ratio, it can achieve high d...

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Abstract

A belt suitable in a brownstock washer machine and a method of producing the same are provided. The belt is produced from a high-density multi-layer woven fabric, which is preferably made using an eight-shed weave pattern. The fabric provides high fiber support via a high warp-density / long-warp-float while achieving high drainage / resistance-to-sealing through increased void volume.

Description

technical field [0001] This invention relates to the preparation of wood pulp for papermaking, and more particularly to the washing of pulp for papermaking. Background technique [0002] Papermaking begins with processing wood. Wood is mostly composed of two main organic substances, that is, it is composed of chains of carbon atoms and rings of carbon atoms. Cellulose in plant cell walls is the fibrous material used to make paper. The large and complex lignin molecules act as a binder to hold the cellulose fibers together and strengthen the cell walls, giving wood its mechanical strength. To convert wood into pulp suitable for papermaking, the lignin must be removed from the cellulose fibers. Mechanical pulping produces groundwood pulp by physically tearing wood fibers apart, while most of the lignin remains intact in the pulp. The high lignin content in groundwood pulp makes paper products less durable and prone to degradation (eg, yellowing) over time. Mechanical pulp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/00D21C9/06
CPCD21F1/0045
Inventor 格雷戈里·D·齐拉克尔马克·莱文约翰·范汉德尔
Owner ALBANY INT CORP