Medium-speed qualitative filter paper and preparation method thereof

A qualitative filter paper, medium-speed technology, applied in the field of filter paper, can solve the problems of high residual ash, poor water resistance of qualitative filter paper, and reduced filtration accuracy

Inactive Publication Date: 2016-09-28
杭州特种纸业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Medium-speed qualitative filter paper and preparation method thereof

Examples

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Example Embodiment

[0023] Example 1

[0024] A medium-speed qualitative filter paper has a three-layer structure from the inflow surface to the outflow surface of the filter paper, and the middle layer of the three-layer structure, in parts by weight, comprises 20 parts of softwood pulp, 30 parts of alkali-treated cotton Linter pulp, 1 part of dispersant, 1 part of wet strength agent; the inflow surface layer, in parts by weight, includes 10 parts of acetate fiber, 30 parts of flax fiber, 0.2 part of water repellent, 0.5 part of wet strength agent ; Described outflow surface layer, in parts by weight, comprises 10 parts of polypropylene fibers, 30 parts of bamboo fibers, 0.2 parts of waterproofing agent; Described dispersant is carboxymethyl cellulose; Described wet strength agent is Polyamide polyepichlorohydrin resin; the waterproofing agent is selected from melamine resin, and the content of α-cellulose in the medium-speed qualitative filter paper is 95%.

[0025] The preparation method of t...

Example Embodiment

[0032] Example 2

[0033] A medium-speed qualitative filter paper has a three-layer structure from the inflow surface to the outflow surface of the filter paper, and the middle layer of the three-layer structure, in parts by weight, comprises 40 parts of softwood pulp, 80 parts of alkali-treated Cotton linter pulp, 3 parts of dispersant, 2 parts of wet strength agent; the inflow surface layer, in parts by weight, includes 30 parts of acetate fiber, 60 parts of flax fiber, 2 parts of water repellant, 2 parts of wet strength The described outflow surface layer, in parts by weight, comprises 30 parts of polypropylene fibers, 80 parts of bamboo fibers, and 2 parts of water repellent; the dispersant is sodium pyrophosphate; the wet strength agent is a polymer Amide polyepichlorohydrin resin; the waterproofing agent is waterproof pulp, and the content of α-cellulose in the medium-speed qualitative filter paper is 98%.

[0034] The preparation method of the above-mentioned medium-sp...

Example Embodiment

[0041] Example 3

[0042]A medium-speed qualitative filter paper has a three-layer structure from the inflow surface to the outflow surface of the filter paper, and the middle layer of the three-layer structure, in parts by weight, comprises 30 parts of softwood pulp, 60 parts of alkali-treated cotton Linter pulp, 2 parts of dispersant, 1 part of wet strength agent; the inflow surface layer, in parts by weight, includes 20 parts of acetate fiber, 50 parts of flax fiber, 1 part of water repellant, 1 part of wet strength agent ; Described outflow surface layer, in parts by weight, comprises 20 parts of polypropylene fibers, 60 parts of bamboo fibers, 1 part of water repellent; Described dispersant is sodium hexametaphosphate; Described wet strength agent is poly Amide polyepichlorohydrin resin; the waterproofing agent is urea-formaldehyde resin, and the content of α-cellulose in the medium-speed qualitative filter paper is 97%.

[0043] The preparation method of the above-menti...

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Abstract

The invention provides medium-speed qualitative filter paper. The medium-speed qualitative filter paper is of a three-layer structure from an inflow face to an outflow face of the filter paper, wherein a middle layer of the three-layer structure contains the ingredients in parts by weight: 20-40 parts of softwood pulp and 30-80 parts of alkali-treated cotton linter pulp; the inflow face contains the ingredients in parts by weight: 10-30 parts of acetate fibers and 30-60 parts of flax fibers; the outflow face contains the ingredients in parts by weight: 10-30 parts of polypropylene fibers and 40-80 parts of bamboo fibers. The medium-speed qualitative filter paper has the characteristics of good filtering and absorbing performance, long service life, good wet strength and high compressive strength.

Description

technical field [0001] The invention relates to the technical field of filter paper, in particular to a medium-speed 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 f...

Claims

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Application Information

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IPC IPC(8): D21H27/08D21H11/12D21H13/14D21H13/20D21F11/14D21D1/30
CPCD21H27/08D21D1/303D21F11/14D21H11/12D21H13/14D21H13/20
Inventor 吴安波
Owner 杭州特种纸业有限公司
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