Quick qualitative filter paper and preparation method thereof

Abstract

The invention relates to the technical field of filter materials, and discloses quick qualitative filter paper and a preparation method thereof. The invention discloses an alkali-treated cotton fiber composite fiber, which comprises the following components in parts by weight: 50 to 100 parts of mixed pulp of alkali-treated cotton linter pulp and alkali-treated cotton linter pulp, 30 to 60 parts of mixed plant fiber, 5 to 10 parts of PET and pp composite staple fiber, 2 to 5 parts of water-soluble phenolic resin, and 2 to 5 parts of polypropylene fiber, the mixed plant fiber comprises bamboo fiber, pineapple fiber, jute fiber, coconut fiber, psyllium fiber, and straw fiber, and the mixed plant fiber comprises bamboo fiber, pineapple fiber, jute fiber, coconut fiber, psyllium fiber, and straw fiber. The quick qualitative filter paper is prepared from one or a combination of more of Chinese silvergrass pulp and Chinese alpine rush pulp according to the component proportion by a specific preparation method, and the main performance indexes of the quick qualitative filter paper can reach that the ash content is 0.10, the average pore size is 18 microns, the maximum pore size is 29 microns, the dry bursting strength is 120 + / -5 kPa, the stiffness is 26.5 N / m, and the filter paper has the characteristics of high quality, high quality and the like. The invention has the beneficial effects of high strength, good toughness, difficult damage in the suction filtration process, no influence on the final separation measurement result, convenient use and environmental protection.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to an ultra-fast 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. One characteristic of qualitative filter paper made with this composition is that its mechanical strength and toughness Poor, in the actual situation of using qualitative filter paper in the laboratory, in order to speed up the filtration, the...

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 an ultra-fast 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