Preparation method of ULPA ultra performance air filter material

An air filter material and ultra-high-efficiency technology, applied in the direction of filtration separation, separation method, pulp beating method, etc., can solve the problems of porosity, low efficiency of dust holding capacity, etc., achieve low resistance, high dust holding capacity, and increase the effect of effective space

Active Publication Date: 2011-05-11
CHONGQING ZAISHENG TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the filter medium is HEPA filter material, its porosity, dust holding capacity and efficiency are relatively low

Method used

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  • Preparation method of ULPA ultra performance air filter material
  • Preparation method of ULPA ultra performance air filter material
  • Preparation method of ULPA ultra performance air filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step: the preparation method of ultrafine glass fiber

[0026] Superfine glass fibers are produced according to the prior art.

[0027] In the second step, 20% by weight of glass fibers with an average diameter of 0.3 μm, 30% by weight of glass fibers with an average diameter of 0.4 μm, 20% by weight of glass fibers with an average diameter of 9 μm, and 30% by weight of glass fibers with an average diameter of 17 μm long glass fibers (length 8-10mm) were beaten and dispersed in an aqueous solution with sulfuric acid, and the mass concentration of the slurry was controlled to be 5%. The acidity of the slurry was controlled to be pH 2.5 with sulfuric acid, and the beating time was 45 minutes.

[0028] The third step is adding the obtained slurry into a slurry tank to dilute to a mass concentration of 0.5%, adjusting the pH to 3.5, and storing it for 60 minutes under this condition to redisperse the slurry.

[0029] The fourth step is to remove the slag from the...

Embodiment 2

[0033] The first step: the preparation method of ultrafine glass fiber

[0034] Using self-made fiber glass block, the composition of the fiber glass block and its weight / number ratio are: SiO 2 48 copies, Al 2 o 3 10 copies, B 2 o 3 16 parts, Na 2 O 13 parts, K 2 1 part of O, 0.3 parts of CaO, 0.2 parts of MgO, 8 parts of BaO, and 3.5 parts of ZnO. The fiber glass block is heated to 950°C and melted in the furnace, and the wire is drawn through the arrangement of leakage holes with a diameter of 1mm. The drawing diameter is controlled at 10μm, and the drawing speed is 2.5m / min. The jetted flame makes the glass filaments into glass fibers below 0.3μm, the nozzle width of the combustion chamber is 6mm, and the jet air velocity is 600m / s to obtain micro glass fibers, see figure 1 .

[0035]In the second step, 29% by weight of glass fibers with an average diameter of 0.2 μm, 28% by weight of glass fibers with an average diameter of 0.6 μm, 15% by weight of glass fibers...

Embodiment 3

[0041] The preparation method is the same as in Example 2, and the composition of the mixed glass fibers is: 25% by weight of glass fibers with an average diameter of 0.3 μm, 35% by weight of glass fibers with an average diameter of 0.8 μm, and 18% by weight of glass fibers with an average diameter of 9 μm Fiber and 22% by weight of glass long fibers (8-10 mm in length) with an average diameter of 22 μm.

[0042] The resulting filter material was inspected. The technical indicators, inspection conditions and test methods are carried out according to the requirements stipulated in the current foreign Class 5000ULPA filter material technical conditions. The results can be seen in Table 1 and Table 2.

[0043] Table 1: The piece performance of filter material of the present invention

[0044]

[0045] Table 2: The permeability of filter material of the present invention and other filter materials

[0046]

[0047] It can be seen that the various performances of the air fi...

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Abstract

The invention discloses a preparation method of ULPA super performance air filter material, including the following steps: step (1), 20-30wt% of glass fiber with average diameter of 0.1-0.3 Mum, 28-35wt% of glass fiber with average diameter of 0.4-1 Mum, 15-20wt% of glass fiber with average diameter of 5-7 Mum and 20-30wt% of long glass fiber with average diameter of 15-20 Mum are dispersed in water by beating, mass concentration of size is controlled to be 4.5-5.5%, acidity is controlled to be pH 2.1-2.6, and time of beating is controlled to be 40-48min; step (2), size obtained by the step (1) is diluted and stored; step (3), paper is made; step (4), sizing is carried out; step (5), drying is carried out. The invention has the advantages of high poriness, high clogging capacity and high efficiency.

Description

Technical field [0001] The filter media involved in the air filter involved in the present invention is specifically to prepare the ULPA ultra -efficient air filter material. Background technique [0002] Ultra -low penetration rate air (ULPA) filtering material is currently the highest filter material in the world. It is widely used abroad in oversized integrated circuits, atomic energy power stations, radioactive medical care, genetic engineering, computer host, food processing, pharmaceutical medicine, Virus, etc.Compared with high -efficiency particle air (HEPA) filtering materials, ULPA filtering materials are highly technical and difficult, which attracts high attention in the field of purification.The particles of the particle size are the capture object, and the filtration efficiency is composed of a variety of filtering mechanisms such as interception and diffusion. The ULPA filtering material is mainly based on 0.1 μm particle size as the grain.Filtering methods dominat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/40D21D1/02D21H21/16B01D39/18
Inventor 秦大江刘军
Owner CHONGQING ZAISHENG TECH CORP
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