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Fast qualitative filter paper and preparing method thereof

A qualitative filter paper, rapid technology, applied in the field of filter paper, can solve the problems of high residual ash, paper leakage, and reduced filtration accuracy

Inactive Publication Date: 2016-11-23
杭州特种纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Qualitative filter paper, that is, qualitative analysis filter paper, generally has a lot of residual ash, which is only used for general qualitative analysis and for filtering sediment or suspension in solution, and cannot be used for quality analysis
However, the existing qualitative filter paper uses a single wood pulp as a raw material. For this single fiber material, in order to improve the filtration accuracy, the pore size must be reduced, which will increase the filtration resistance and shorten the practical life; in order to reduce the filtration resistance and prolong the service life , it is necessary to increase the pore size, but it will reduce the filtration accuracy, so it is difficult to balance the performance parameters such as filtration accuracy and filtration resistance through the adjustment of microscopic pores; in addition, this kind of qualitative filter paper has poor water resistance, and it is easy to cause paper to break after a short period of filtration. leak

Method used

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  • Fast qualitative filter paper and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] A rapid qualitative filter paper, which has a three-layer structure from the inflow surface to the outflow surface of the filter paper, the middle layer of the three-layer structure includes 20 parts of viscose fiber, 30 parts of alkali-treated cotton short Fluff pulp, 1 part of dispersant, 1 part of wet strength agent; the described flow-in surface layer includes 10 parts of acetate fiber, 30 parts of flax fiber, 0.2 part of water repellent, and 0.5 part of wet strength agent; The outflow surface layer includes 10 parts of polypropylene fibers, 30 parts of bamboo fibers, and 0.2 parts of waterproofing agent in parts by weight; the described dispersant is carboxymethyl cellulose; the described wet strength agent is polystyrene Amide polyepichlorohydrin resin; the waterproofing agent is selected from melamine resin, and the α-cellulose content in the rapid qualitative filter paper is 95%.

[0025] The preparation method of above-mentioned fast qualitative filter paper, c...

Embodiment 2

[0033] A rapid qualitative filter paper, which is a three-layer structure from the inflow surface to the outflow surface of the filter paper, the middle layer of the three-layer structure includes 40 parts of viscose fiber, 80 parts of alkali-treated cotton Short fluff pulp, 3 parts of dispersant, 2 parts of wet strength agent; the described flow-in surface layer includes 30 parts of acetate fiber, 60 parts of flax fiber, 2 parts of water repellent, 2 parts of wet strength agent ; The outflow surface layer includes 30 parts by weight of polypropylene fiber, 80 parts of bamboo fiber, and 2 parts of water repellent; the described dispersant is sodium pyrophosphate; the described wet strength agent is polyamide Polyepichlorohydrin resin; the waterproofing agent is waterproof slurry, and the α-cellulose content in the rapid qualitative filter paper is 98%.

[0034] The preparation method of above-mentioned fast qualitative filter paper, comprises the steps:

[0035] 1) Prepare th...

Embodiment 3

[0042]A rapid qualitative filter paper, which is a three-layer structure from the inflow surface to the outflow surface of the filter paper, the middle layer of the three-layer structure includes 30 parts of viscose fiber, 60 parts of alkali-treated cotton short Fluff pulp, 2 parts of dispersant, 1 part of wet strength agent; the described flow-in surface layer includes 20 parts of acetate fiber, 50 parts of flax fiber, 1 part of waterproofing agent, and 1 part of wet strength agent in parts by weight; The outflow surface layer includes 20 parts by weight of polypropylene fiber, 60 parts of bamboo fiber, and 1 part of water repellent; the described dispersant is sodium hexametaphosphate; the described wet strength agent is polyamide Polyepichlorohydrin resin; the waterproofing agent is urea-formaldehyde resin, and the α-cellulose content in the rapid qualitative filter paper is 97%.

[0043] The preparation method of above-mentioned fast qualitative filter paper, comprises the...

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Abstract

The invention provides fast qualitative filter paper. A three-layer structure is formed from the inflow surface to the outflow surface of the filter paper. A middle layer of the three-layer structure comprises, by weight, 20-40 pats of viscose and 30-80 parts of alkali treated cotton linter pulp. An inflow surface layer comprises, by weight, 10-30 parts of cellulose acetate fiber and 30-60 parts of linen fiber. An outflow surface layer comprises, by weight, 10-30 parts of polypropylene fiber and 40-80 parts of bamboo fiber. The fast qualitative filter paper has the advantages of being high in filtration absorption performance, long in service life, high in wet strength and high in compressive strength.

Description

technical field [0001] The invention relates to the technical field of filter paper, in particular to a rapid qualitative filter paper and a preparation method thereof. Background technique [0002] Qualitative filter paper, that is, qualitative analysis filter paper, generally has a lot of residual ash, which is only used for general qualitative analysis and for filtering sediment or suspension in solution, and cannot be used for quality analysis. However, the existing qualitative filter paper uses a single wood pulp as a raw material. For this single fiber material, in order to improve the filtration accuracy, the pore size must be reduced, which will increase the filtration resistance and shorten the practical life; in order to reduce the filtration resistance and prolong the service life , it is necessary to increase the pore size, but it will reduce the filtration accuracy, so it is difficult to balance the performance parameters such as filtration accuracy and filtrati...

Claims

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Application Information

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IPC IPC(8): D21H27/08D21H15/10D21H13/02D21H13/06D21H11/12D21H13/14D21H21/16D21H21/20D21H21/08D21F11/14
CPCD21H27/08D21F11/14D21H11/12D21H13/02D21H13/06D21H13/14D21H15/10D21H21/08D21H21/16D21H21/20
Inventor 吴安波
Owner 杭州特种纸业有限公司
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