Rapid quantitative filter paper and preparation method thereof

A quantitative filter paper, rapid technology, applied in the field of filter paper, can solve the problems of paper leakage, lower filtration accuracy, poor water resistance of quantitative filter paper, etc.

Inactive Publication Date: 2016-09-21
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

However, the existing quantitative 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 type of quantitative 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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  • Rapid quantitative filter paper and preparation method thereof
  • Rapid quantitative filter paper and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] Rapid quantitative 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 includes 20 parts of softwood pulp and 40 parts of hardwood pulp in parts by weight; The flow-in surface layer includes 20 parts of softwood pulp and 30 parts of short-staple cotton pulp in parts by weight, and the outflow surface layer includes 20 parts of hardwood pulp and 30 parts of short-staple cotton in parts by weight. paddle; the softwood pulp, hardwood pulp and linter cotton pulp are respectively soaked in hydrofluoric acid and hydrochloric acid mixture, then neutralized by alkali, and finally washed with ion-exchanged pure water or distilled water to obtain the obtained. The α-cellulose content in the rapid quantitative filter paper is 98%.

[0020] The total weight is 80±4.0g / m 2 , Quantitative flow into the surface layer is 30±2g / m 2 , the middle layer is 20±1g / m 2 , the outflow s...

Embodiment 2

[0030] Rapid quantitative 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 includes 40 parts of softwood pulp and 20 parts of hardwood pulp in parts by weight; The flow-in surface layer includes 40 parts of softwood pulp and 80 parts of short-staple cotton pulp in parts by weight, and the outflow surface layer includes 40 parts of hardwood pulp and 30 parts of short-staple cotton in parts by weight. paddle; the softwood pulp, hardwood pulp and linter cotton pulp are respectively soaked in hydrofluoric acid and hydrochloric acid mixture, then neutralized by alkali, and finally washed with ion-exchanged pure water or distilled water to obtain the obtained. The α-cellulose content in the rapid quantitative filter paper is 99%.

[0031] As a preference, the total weight is 80±4.0g / m 2 , Quantitative flow into the surface layer is 30±2g / m 2 , the middle layer is 20±1g / m ...

Embodiment 3

[0041] Rapid quantitative 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 includes 30 parts of softwood pulp and 20 parts of hardwood pulp in parts by weight; The flow-in surface layer includes 30 parts of softwood pulp and 60 parts of short-staple cotton pulp in parts by weight, and the outflow surface layer includes 40 parts of hardwood pulp and 50 parts of short-staple cotton in parts by weight. paddle; the softwood pulp, hardwood pulp and linter cotton pulp are respectively soaked in hydrofluoric acid and hydrochloric acid mixture, then neutralized by alkali, and finally washed with ion-exchanged pure water or distilled water to obtain the obtained. The α-cellulose content in the rapid quantitative filter paper is 98.5%.

[0042] As a preference, the total weight is 80±4.0g / m 2, Quantitative flow into the surface layer is 30±2g / m 2 , the middle layer is 20±1g / m ...

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Abstract

The invention provides rapid quantitative filter paper. The rapid quantitative filter paper is of a three-layered structure from a flowing-in surface to a flowing-out surface of the filter paper; a middle layer of the three-layered structure is prepared from the following raw materials in parts by weight: 20 to 40 parts of softwood pulp and 20 to 40 parts of hardwood pulp; the flowing-in surface layer is prepared from the following raw materials in parts by weight: 20 to 40 parts of softwood pulp and 30 to 80 parts of short-staple cotton pulp; the flowing-out surface layer is prepared from the following raw materials in parts by weight: 20 to 40 parts of hardwood pulp and 30 to 80 parts of short-staple cotton pulp; the softwood pulp, the hardwood pulp and the short-staple cotton pulp are immersed with a mixed solution of hydrofluoric acid and hydrochloric acid respectively, then are neutralized with an alkali and are finally washed with ion-exchanged pure water or distilled water to prepare the rapid quantitative filter paper. The rapid quantitative filter paper has the characteristics of good filtering and absorption performances, long service life, good humidity and strength and high compressive strength.

Description

technical field [0001] The invention relates to the technical field of filter paper, in particular to a rapid quantitative filter paper and a preparation method thereof. Background technique [0002] Quantitative filter paper, that is, quantitative analysis filter paper, has very little residual ash after burning, which has almost no effect on the analysis results, and is suitable for precise quantitative analysis; the amount of ash produced after ashing does not exceed 0.0009%. However, the existing quantitative 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21H11/00D21C9/00D21F11/14D21D1/30
CPCD21C9/004D21D1/303D21F11/14D21H11/00D21H27/08
Inventor 吴安波
Owner 杭州特种纸业有限公司
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