Preparation method of ULPA ultra performance air filter material

An air filtration material and ultra-efficient technology, applied in filtration and separation, separation methods, pulp beating methods, etc., can solve problems such as porosity and low dust holding capacity, achieve low resistance, increase effective pore volume, and improve the scope of use and service life

Active Publication Date: 2010-02-10
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 porosi

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

[0023] The first step: the preparation method of ultrafine glass fiber

[0024] Superfine glass fibers are produced according to the prior art.

[0025] 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.

[0026] 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.

[0027] The fourth step is to remove the slag from the...

Embodiment 2

[0031] The first step: the preparation method of ultrafine glass fiber

[0032] 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 .

[0033]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

[0039] 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.

[0040] 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.

[0041] Table 1: Performance of filter material of the present invention

[0042]

[0043] Table 2: The permeability of filter material of the present invention and other filter materials

[0044]

[0045] It can be seen that the various performances of the air filter mater...

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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 invention relates to a filter medium of an air filter, in particular to a preparation method of a ULPA ultra-high-efficiency air filter material. Background technique [0002] Ultra-low penetration rate air (ULPA) filter material is currently the highest filter material in the world, and is widely used abroad in VLSI, atomic power stations, radiological medicine, genetic engineering, computer hosts, food processing, and pharmaceuticals , viruses, etc. Compared with high-efficiency particulate air (HEPA) filter materials, ULPA filter materials have high technical performance and high technical difficulty, which has attracted great attention in the field of purification, mainly because of major changes in the filtration mechanism. HEPA filter materials are based on 0.3μm Particles with a particle size are the target of capture, and the filtration efficiency is composed of various filtration mechanisms such as interception and diffusion. The ULPA fil...

Claims

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Application Information

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