Low-speed qualitative filter paper and preparation method thereof

A qualitative filter paper, 2-5 technology, applied in pulp beating method, pulp beating/refining method, filter paper, etc., can solve the problems of poor strength and toughness of filter paper, unable to meet the requirements of filter paper, etc. , high-strength effect

Pending Publication Date: 2021-08-24
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

[0003] The present invention solves the poor strength and toughness of the filter paper in the prior art, which cannot meet the requirements of the filter paper in the suction filtration method, adopts modified starch light calcium carbonate in the additive, and is easy to react with the active ingredients in the filtrate. Insufficiency that affects the final separation measurement results provides a slow qualitative filter paper with high strength and good toughness, which is not easily damaged during the suction filtration process and does not affect the final separation measurement results and its preparation method

Method used

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  • Low-speed qualitative filter paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of slow qualitative filter paper, obtains by weight part calculation: the mixed pulp of 30 parts of alkali-treated cotton linter pulp and alkali-treated cotton long-staple pulp, the mixed pulp of 40 parts of coniferous wood pulp and alkali-treated cotton long-staple pulp, 20 parts 2 parts of mixed plant fiber, 2 parts of viscose fiber, 2 parts of water-soluble phenolic resin, 2 parts of polypropylene fiber, wherein the mixed plant fiber includes 4 parts of bamboo fiber, 4 parts of psyllium seed fiber, 4 parts of straw fiber, 4 parts of flax fiber, 4 parts of A portion of asparagus pulp.

[0026] Follow the steps below to prepare target slow qualitative filter paper:

[0027] a) Thaw out the mixed pulp of alkali-treated cotton short-fluff pulp and alkali-treated cotton long-fluff pulp, water-soluble phenolic resin, and viscose fiber with a fiber deflagging machine, and add 1 part of vinyl bis stearamide and 1 part of polyamide at the same time Polyepichlorohydrin...

Embodiment 2

[0032] A slow qualitative filter paper, obtained by weight parts: 60 parts of mixed pulp of alkali-treated cotton linter pulp and alkali-treated cotton long-lint pulp, 60 parts of mixed pulp of softwood pulp and hardwood pulp, 35 parts of mixed plant pulp Fiber, 4 parts of viscose fiber, 3 parts of water-soluble phenolic resin, 3 parts of polypropylene fiber, of which mixed plant fibers include 7 parts of bamboo fiber, 7 parts of psyllium seed fiber, 7 parts of straw fiber, 7 parts of flax fiber, and 7 parts of asparagus straw pulp.

[0033] Follow the steps below to prepare target slow qualitative filter paper:

[0034] a) The mixed pulp of alkali-treated cotton short-fluff pulp and alkali-treated cotton long-fluff pulp, water-soluble phenolic resin, and viscose fiber are decomposed with a fiber deflagging machine, and 1.3 parts of vinyl bis stearamide and 1.3 parts of polyamide are added at the same time Polyepichlorohydrin resin, and then through double-disk refiner on-lin...

Embodiment 3

[0039] A kind of slow qualitative filter paper, obtained by weight: 80 parts of mixed pulp of alkali-treated cotton linter pulp and alkali-treated cotton long-lint pulp, 80 parts of mixed pulp of softwood pulp and hardwood pulp, 50 parts of mixed vegetable pulp Fiber, 5 parts of viscose fiber, 5 parts of water-soluble phenolic resin, 5 parts of polypropylene fiber, wherein the mixed plant fiber includes 10 parts of bamboo fiber, 10 parts of psyllium seed fiber, 10 parts of straw fiber, 10 parts of flax fiber, 10 parts of asparagus straw pulp.

[0040] Follow the steps below to prepare target slow qualitative filter paper:

[0041]a) Decompose the mixed pulp of alkali-treated cotton short-fluff pulp and alkali-treated cotton long-fluff pulp, water-soluble phenolic resin, and viscose fiber with a fiber deflagging machine, and add 1.5 parts of vinyl bis stearamide and 1.5 parts of polyamide at the same time Polyepichlorohydrin resin, and then through double-disk refiner on-line ...

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Abstract

The invention relates to the technical field of filter materials, and discloses slow qualitative filter paper and a preparation method thereof. The slow qualitative filter paper comprises 30-80 parts of mixed pulp of alkali-treated cotton linter pulp and alkali-treated cotton linter pulp; 40-80 parts of mixed pulp of softwood pulp and hardwood pulp; 20-50 parts of mixed plant fiber; 20-40 parts of viscose fiber; 2-5 parts of a water-soluble phenolic resin; and 2-5 parts of polypropylene fiber. The mixed plant fibers comprise one or a combination of more of bamboo fibers, pineapple fibers, jute fibers, coconut fibers, psyllium fibers, straw fibers, linen fibers and Chinese alpine rush pulp. According to the invention, the low-speed qualitative filter paper and the preparation method thereof have the beneficial effects that the low-speed qualitative filter paper has high strength and good toughness, is not easy to damage in a suction filtration process, does not influence a final separation measurement result, and is convenient to use and is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a slow qualitative filter paper and a preparation method thereof. Background technique [0002] Qualitative filter paper is generally used in the solid-liquid separation process in the laboratory. In order to prevent the calcium and magnesium ions in the filter paper from reacting with the active ingredients in the filter and affect the final separation measurement results, the ash content of the qualitative filter paper is required to be controlled at 0.2 % and below, in order to meet the ash content requirement, the fiber composition of qualitative filter paper can only be limited to cotton pulp, wood pulp and plant fiber. Poor, in the actual situation of using qualitative filter paper in the laboratory, in order to speed up the filtration, the method of suction filtration will be adopted. Multiple layers of filter paper are stacked in the funnel, which will lead to e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21D1/00D21D1/02D21F5/02D21F9/00D21H11/00D21H11/12D21H13/02D21H13/14D21H17/14D21H17/48D21H17/55D21H21/08D21H21/20
CPCD21H27/08D21H11/12D21H17/48D21H13/02D21D1/006D21D1/02D21H11/00D21H13/14D21F9/006D21F5/02D21H21/08D21H21/20D21H17/14D21H17/55
Inventor 王建业吴琼华吴安波朱政
Owner 杭州特种纸业有限公司
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