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Novel filtering paper and preparation method thereof

A filter paper, a new type of technology, applied in pulp beating/refining method, filter paper, filtration and separation, etc., can solve the problems of scarcity of ultra-fine synthetic fibers, high price, complicated preparation process of filter paper, etc. Good performance, high fibrillation effect

Inactive Publication Date: 2020-02-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of filter paper manufactured by this process are that suitable ultrafine synthetic fibers are scarce and expensive, and the preparation process needs sizing treatment, and the preparation process of filter paper is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A kind of preparation method of novel filter paper of the present invention specifically comprises the steps:

[0031] Step 1, take 40% to 50% of the coniferous wood fiber and put it into a tank beater that has stored water to decompose, control the fiber concentration to 2%, and decompose for 20 minutes;

[0032] Step 2, put the slurry decomposed in step 1 into a PFI refiner for refining, control the refining concentration to 10%, the refining time is 30-60min, and the number of revolutions of the refiner is 13000-18000rpm;

[0033] Step 3, weigh 40g of PET slices and add them to the mixed solvent (the mass ratio of phenol and tetrachloroethane is 1:1), heat and stir in a water bath at 80°C until the slices are completely dissolved to obtain PET with a mass fraction of 10%. Resin synthesis liquid, cooled to room temperature for later use. Then inject the PET resin synthesis liquid into the coagulation liquid composed of absolute ethanol and glycerol, stir evenly at a ...

Embodiment 1

[0039] Step 1, get 40% (percentage by weight) of coniferous wood fiber and put it into the Chushi beater that has stored water, control the fiber concentration to be 2%, and decompose for 20min;

[0040] Step 2, put the decomposed pulp into a PFI refiner for refining, control the refining concentration to 10%, the refining time is 30min, and the revolution number of the refiner is 13000rpm;

[0041] Step 3: Inject the PET resin synthesis solution with a mass percentage of 10% into a coagulation bath composed of glycerol and absolute ethanol with a mass ratio of 1:1, stir evenly at 2000rmp, filter with suction, wash with water, and dehydrate to obtain PET precipitated fiber, the appearance of the precipitated fiber is ribbon-like.

[0042] In step 4, take 5% PET fiber / PP fiber, 35% PET fibrid and the product obtained in step 2 and put them into a deflagger for deflagging, and the deflagging speed is 25000rpm.

[0043] Step 5: Add 20% diatomaceous earth to the product in step 4...

Embodiment 2

[0047] Step 1, get 45% (percentage by weight) of coniferous wood fiber and put it into the tank's beater that has stored water, control the fiber concentration to be 2%, and decompose for 20min;

[0048] Step 2, put the decomposed pulp into a PFI refiner for refining, control the refining concentration to 10%, the refining time is 45min, and the revolution number of the refiner is 15000rpm;

[0049]Step 3: Inject the synthetic liquid of PET resin with a mass percentage of 10% into a coagulation bath composed of glycerol and absolute ethanol with a mass ratio of 1:1, stir evenly under the condition of 3000rmp, suction filter, then wash with water, and obtain after dehydration PET precipitated fiber, the appearance of the precipitated fiber is ribbon-like.

[0050] In step 4, take 10% PP fiber, 30% PET fibril and the product obtained in step 2 and put them into a deflagger for deflagging, and the deflagging speed is 25000rpm.

[0051] Step 5: Add 15% diatomaceous earth to the p...

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Abstract

The invention discloses novel filtering paper, which is prepared from the following raw materials by weight: 40-50% of coniferous wood fiber, 5-17% of PET fiber / PP fiber, 25-35% of PET fibrid and 8-20% of diatomite or bentonite. The invention further discloses a preparation method of the novel filtering paper. According to the invention, the filtering paper is simple and convenient in process, environment-friendly, low in quantification, small in filtering resistance, high in filtering precision and good in strength.

Description

technical field [0001] The invention belongs to the technical field of filter paper preparation, and in particular relates to a novel filter paper, and also relates to a preparation method of the filter paper. Background technique [0002] In recent years, the use of filter paper to filter out impurity particles in liquids has been widely used in chemical, pharmaceutical, food processing, precision machining and other industrial fields, such as the filtration of Chinese herbal medicine residues, the clarification and filtration of beer liquids, and the precision machining working fluids. Filtration of metal corrosion products, etc. The impurity particle size in precision machining working fluid is only about 5 μm; for beer liquid, it is required to meet the purpose of filtering and removing residual protein, polyphenols and some bacteria in beer, and the protein or bacteria The diameter range is generally between 1 μm and 3 μm. Therefore, the filter paper used should have ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D21H27/08D21B1/34D21D1/20D21H17/06D21H17/46D21H17/68
CPCD21B1/345D21D1/20D21H17/06D21H17/46D21H17/68D21H27/08
Inventor 张素风姚雪
Owner SHAANXI UNIV OF SCI & TECH
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