Qualitative filtration paper, preparation method and applications thereof

A qualitative filter paper and amphoteric technology, applied in the field of filter paper, can solve the problems of poor water resistance, unusable quality analysis, and increased filtration resistance of qualitative filter paper, and achieve the effects of good water resistance, good elasticity, and resource saving

Inactive Publication Date: 2017-09-22
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Qualitative filter paper, including 30 parts by weight of corn stalk fiber, 5 parts of polypropylene fiber and 30 parts of high-density cotton linter pulp, 0.05 part of amphoteric polyacrylamide and 0.2 part of modified starch light calcium carbonate were used in the preparation , 0.05 parts of polyethylene oxide having a molecular weight of 2.5 million to 3 million.

[0022] The preparation of the high-density cotton linter pulp is obtained by adding YY-02 penetrating agent for beating and then alkali cooking.

[0023] The preparation method of the corn stalk fiber is as follows: cleaning and cutting the corn stalk into sections, extracting the husk fiber by steaming, bleaching to make the whiteness of the paper meet the requirement, and refining the fiber by beating.

[0024] The preparation method of the described amphoteric polyacrylamide is to dissolve chitosan in acetic acid at 70°C, add acrylamide (AM), maleic acid (MA), methacryloyloxyethyltrimethylammonium chlo...

Embodiment 2

[0033] Qualitative filter paper, including 50 parts by weight of corn stalk fiber, 12 parts of polypropylene fiber and 50 parts of high-density cotton linter pulp, 2 parts of amphoteric polyacrylamide used in the preparation, and 0.8 part of modified starch light calcium carbonate , 3 parts of polyethylene oxide with a molecular weight of 2.5 million to 3 million, and 0.2 part of a defoamer.

[0034] The preparation of the high-density cotton linter pulp is obtained by adding YY-02 penetrating agent for beating and then alkali cooking.

[0035] The preparation method of the corn stalk fiber is as follows: cleaning and cutting the corn stalk into sections, extracting the husk fiber by steaming, bleaching to make the whiteness of the paper meet the requirement, and refining the fiber by beating.

[0036] The preparation method of the described amphoteric polyacrylamide is to dissolve chitosan in acetic acid at 70°C, add acrylamide (AM), maleic acid (MA), methacryloyloxyethyltrim...

Embodiment 3

[0044] Qualitative filter paper, including 45 parts by weight of corn stalk fiber, 10 parts of polypropylene fiber and 36 parts of high-density cotton linter pulp, 1.0 part of amphoteric polyacrylamide used in the preparation, 0.4 part of modified starch light calcium carbonate , 1.5 parts of polyethylene oxide with a molecular weight of 2.5 million to 3 million, and 0.1 part of a defoamer.

[0045] The preparation of the high-density cotton linter pulp is obtained by adding YY-02 penetrating agent for beating and then alkali cooking.

[0046] The preparation method of the corn stalk fiber is as follows: cleaning and cutting the corn stalk into sections, extracting the husk fiber by steaming, bleaching to make the whiteness of the paper meet the requirement, and refining the fiber by beating.

[0047] The preparation method of the described amphoteric polyacrylamide is to dissolve chitosan in acetic acid at 70°C, add acrylamide (AM), maleic acid (MA), methacryloyloxyethyltrimeth...

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PUM

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Abstract

The present invention provides qualitative filtration paper, which comprises, by weight, 30-50 parts of corn straw fiber, 5-12 parts of polypropylene fiber, and 30-50 parts of high density cotton linter pulp, wherein 0.05-2 parts of amphoteric polyacrylamide, 0.2-0.8 part of modified starch light calcium carbonate, 0.05-3 parts of polyoxyethylene having a molecular weight of 2500000-3000000, and 0-0.2 part of a defoamer are used during the preparation, and an impregnant is a modified phenol formaldehyde resin. The qualitative filtration paper of the present invention has advantages of good filtration absorption performance, long service life, good water resistance, and high compressive strength.

Description

technical field [0001] The invention relates to the technical field of filter paper, in particular to a qualitative filter paper and its preparation method and application. 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 filt...

Claims

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Application Information

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IPC IPC(8): D21H15/10D21H11/12D21H13/14D21H17/69D21H17/53D21H17/37D21H21/12D21H23/30D21H23/32D21H19/10D21H27/08D21F11/14
CPCD21H15/10D21F11/14D21H11/12D21H13/14D21H17/37D21H17/53D21H17/69D21H19/10D21H21/12D21H23/30D21H23/32D21H27/08
Inventor 王建业吴琼华吴安波
Owner 杭州特种纸业有限公司
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