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Production process of high-dust-holding-capacity filter paper

A production process and technology of dust holding capacity, applied in the field of filter material manufacturing, can solve problems such as affecting the filtration efficiency and reducing the air permeability of filter paper, and achieve the effect of improving dust holding capacity, prolonging service life and being environmentally friendly.

Active Publication Date: 2020-04-03
石家庄辰泰滤纸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to increase the dust holding capacity of the filter paper, it is generally chosen to add thickeners or demulsifiers to the glue to prevent the thermal migration of the resin. Although these inhibitors can control the thermal migration of the resin to a certain extent, due to the The resin-cured structure will reduce the air permeability of the filter paper, which will seriously affect the filtration efficiency

Method used

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  • Production process of high-dust-holding-capacity filter paper

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of production technology of filter paper with high dust holding capacity, concrete steps are as follows:

[0029] Pulping: Feed hardwood pulp and softwood pulp into a pulper according to a certain ratio, and after pulping, the wood pulp raw materials are evenly dispersed in water to obtain pulp;

[0030] Wet forming: the slurry is evenly distributed on the forming net through the headbox, and vacuum suction is used to remove a large amount of water to form a wet paper sheet;

[0031] Base paper drying: dry the wet paper sheets to obtain base paper without moisture, which is convenient for absorbing glue and applying glue; after drying, the base paper has a weight of 95 grams, a thickness of 0.35 mm, and an air permeability of 160 L / m 2 / s, the bursting strength is 90kpa.

[0032] Dipping and gluing: dip the dried base paper in acrylic latex (viscosity 250cp) for 1.5s, so that the latex fully penetrates the base paper.

[0033] Drying: four sets of drying cylind...

Embodiment 2

[0041] A kind of production technology of filter paper with high dust holding capacity, concrete steps are as follows:

[0042] Pulping: Feed hardwood pulp and softwood pulp into a pulper according to a certain ratio, and after pulping, the wood pulp raw materials are evenly dispersed in water to obtain pulp;

[0043] Wet forming: the slurry is evenly distributed on the forming net through the headbox, and vacuum suction is used to remove a large amount of water to form a wet paper sheet;

[0044] Base paper drying: dry the wet paper sheets to obtain base paper with a moisture content of 3wt%, which is convenient for absorbing glue and applying glue; after drying, the base paper has a weight of 115 grams, a thickness of 0.45 mm, and an air permeability of 500 L / m 2 / s, the bursting strength is 60kpa.

[0045] Dipping and gluing: dip the dried base paper in acrylic latex (viscosity 800cp) for 1.5s, so that the latex fully penetrates the base paper.

[0046] Drying: four sets ...

Embodiment 3

[0054] The base paper obtained in Example 2 was dipped and coated with the same conditions and then dried with the same four sets of drying cylinders, the difference being the temperature of each group of drying cylinders, the time passing through each drying cylinder and the total drying of each step The time is as follows:

[0055] (1) 180°C, 5s, 1min;

[0056] (2) 150°C, 5s, 0.5min;

[0057] (3) 150°C, 5s, 0.5min;

[0058] (4) 140°C, 5s, 40s.

[0059] The grammage, thickness, air permeability and bursting strength of the filter paper sheets after drying in this embodiment are equivalent to those in embodiment 2, and the dust holding capacity is 69g / m 2 .

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Abstract

The invention relates to the technical field of filter material manufacturing, and particularly discloses a production process of high-dust-holding-capacity filter paper. According to the production process, filter paper base paper is dipped and glued and then is subjected to drying treatment, in the drying treatment process, a drying cylinder is adopted for drying, and the temperature and the drying time of the drying cylinder are adjusted, so that the accurate control on the thermal migration process of a resin glue solution is realized, gradient distribution is formed in a filter paper interface, and the filter material dust holding capacity is improved.

Description

technical field [0001] The invention relates to the technical field of filter material manufacturing, in particular to a production process of filter paper with a high dust holding capacity. Background technique [0002] Manufacturing high-efficiency, low-resistance and long-life filter media is the eternal goal of the filtration industry. At present, in the filter material manufacturing industry, in order to improve the strength of filter paper, it is generally selected to use reinforced resin to glue the base paper of filter paper, and the strength of filter paper can be significantly improved after drying. During the drying process of the coated filter paper, the resin glue will migrate thermally with the water, and the water evaporates on the surface of the filter paper, while the resin tends to accumulate on the surface of the filter paper, blocking the filter pores and reducing the dust holding capacity of the filter paper. [0003] In order to increase the dust holdi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/04D21H27/08D21H17/37
CPCD21F5/04D21H17/37D21H27/08
Inventor 李攀石占辉沈新
Owner 石家庄辰泰滤纸有限公司
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