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A production process of filter paper with high dust holding capacity

A technology of production process and dust holding capacity, which is applied in the field of filter material manufacturing, can solve the problems of reduced air permeability of filter paper and affect filtration efficiency, etc., and achieve the effects of prolonging service life, improving dust holding capacity, good waterproof and aging resistance

Active Publication Date: 2021-09-24
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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  • A production process of filter paper with high dust holding capacity
  • A production process of filter paper with high dust holding capacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Producing process, specific dust holding capacity paper steps as follows:

[0029] Pulper: The hardwood pulp and softwood pulp in accordance with a certain proportion of the feed into the pulper, pulped wood pulp material are uniformly dispersed in water to obtain a slurry;

[0030] Wet molding: the slurry through a headbox evenly distributed in the forming wire, and vacuum suction to remove large amounts of water to form a wet sheet;

[0031] Paper Drying: drying the wet paper sheet, obtaining water-free paper, easy to absorb adhesive glue; paper weight after drying was 95 g and a thickness of 0.35 mm, air permeability of 160L / m 2 / S, bursting was 90kpa.

[0032] Gumming dipping: After drying the paper was immersed in an acrylic latex (Viscosity 250cp), the immersion time 1.5s, full penetration of the latex base paper.

[0033] Drying: The four dryer drying,

[0034] The first group consists of four cylinder dryer, whose temperature was controlled at 160 degrees, betwee...

Embodiment 2

[0041] Producing process, specific dust holding capacity paper steps as follows:

[0042] Pulper: The hardwood pulp and softwood pulp in accordance with a certain proportion of the feed into the pulper, pulped wood pulp material are uniformly dispersed in water to obtain a slurry;

[0043] Wet molding: the slurry through a headbox evenly distributed in the forming wire, and vacuum suction to remove large amounts of water to form a wet sheet;

[0044] Paper Drying: drying the wet paper sheet, obtaining a moisture content of 3wt% of the paper, glue coating to facilitate absorption; paper weight after drying was 115 g and a thickness of 0.45 mm, air permeability of 500L / m 2 / S, bursting was 60kpa.

[0045] Gumming dipping: After drying the paper was immersed in an acrylic latex (viscosity 800 cp), the immersion time 1.5s, full penetration of the latex base paper.

[0046] Drying: Drying dryer using four groups:

[0047] The first dryer group of the dryer 12, whose temperature was ...

Embodiment 3

[0054] Example 2 A base paper obtained in the same embodiment in accordance with the same conditions as impregnation coating dryer group drying four, except that the temperature of each group of drying cylinders, each cylinder through each step of the total drying time and hours are as follows:

[0055] (1) 180 ℃, 5s, 1min;

[0056] (2) 150 ℃, 5s, 0.5min;

[0057] (3) 150 ℃, 5s, 0.5min;

[0058] (4) 140 ℃, 5s, 40s.

[0059] After drying embodiment of the present embodiment grams of filter paper weight, thickness, air permeability and burst strength of Example 2 is quite dust holding capacity of 69g / m 2 .

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Abstract

The invention relates to the technical field of filter material manufacturing, and specifically discloses a production process of filter paper with a high dust holding capacity, which involves drying the base paper of the filter paper after being dipped and coated with glue. The temperature and drying time are adjusted to achieve precise control of the thermal migration process of the resin glue, making it form a gradient distribution in the filter paper interface and improving the dust holding capacity of the filter material.

Description

Technical field [0001] The present invention relates to the technical field of manufacturing the filter medium, particularly relates to a high dust holding capacity paper production process. Background technique [0002] Manufacturing efficiency and low resistance and long life of the filter filtration industry is always our goal. Currently, manufacturing filter, to improve the strength of paper-reinforced resin is generally selected using filter paper coating base paper treatment, paper strength after drying can be improved significantly. Filter paper glue to glue the resin with hot water to migrate during the drying process, the surface of the water evaporated in the filter paper, the filter paper and the surface of the resin is often aggregated, clogging of the filter holes, so that the amount of paper dust is reduced. [0003] In order to increase the dust holding capacity paper, a thickener or the like typically opt demulsifier glue obstruction agent to prevent the migration...

Claims

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Application Information

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Patent Type & Authority Patents(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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