CN108797209B - Low-boron filter paper and preparation method thereof - Google Patents
Low-boron filter paper and preparation method thereof Download PDFInfo
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- CN108797209B CN108797209B CN201810689343.1A CN201810689343A CN108797209B CN 108797209 B CN108797209 B CN 108797209B CN 201810689343 A CN201810689343 A CN 201810689343A CN 108797209 B CN108797209 B CN 108797209B
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- 229910052796 boron Inorganic materials 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 58
- 239000003365 glass fiber Substances 0.000 claims abstract description 55
- 229920000742 Cotton Polymers 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 10
- 238000010009 beating Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 238000007865 diluting Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract description 13
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000010943 off-gassing Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/14—Making cellulose wadding, filter or blotting paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/001—Drying webs by radiant heating
- D21F5/002—Drying webs by radiant heating from infrared-emitting elements
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/14—Drying webs by applying vacuum
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
Abstract
The invention relates to low-boron filter paper and a preparation method thereof, belonging to the technical field of air filtration, wherein the low-boron filter paper is prepared from the following components in percentage by mass: 4-6wt% of glass fiber cotton with the fiber diameter of 0.4 μm, 20-30wt% of glass fiber cotton with the fiber diameter of 0.6 μm, 40-50wt% of glass fiber cotton with the fiber diameter of 1.5 μm, 6-12wt% of glass fiber cotton with the fiber diameter of 2.6 μm, 5-10wt% of glass fiber cotton with the fiber diameter of 2.8 μm and 5-10wt% of alkali-free glass fiber short cut filament with the fiber diameter of 6-8 μm. The low-boron filter paper has the boron content of less than or equal to 0.15 percent, is not easy to generate boron outgassing (TOC) in a relatively humid and HF environment, and effectively reduces the environmental pollution. The preparation method adopts a wet forming process, is simple and convenient to operate, has low cost and is suitable for industrial production.
Description
Technical Field
The invention belongs to the technical field of air filtration, and particularly relates to low-boron filter paper and a preparation method thereof.
Background
With the increasing severity of environmental protection problems, the requirements for clean plants in the electronic industry are becoming more stringent, and therefore, a new step is created in the examination of energy-saving clean products. However, the existing filtering products have high boron content, and boron outgassing (TOC) is easily generated in hydrofluoric acid or humid environment, and because boron is a pollutant, the emission of boron is strictly controlled by environmental regulations, so that expensive waste gas treatment facilities need to be established to ensure that the emitted waste gas reaches the environmental protection standard specified by the state, but the production cost is additionally increased, and secondary pollution of solid wastes is easily caused, so that the development of one or a series of low-boron filtering material products is not slow.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a low boron filter paper; the second purpose is to provide a preparation method of the low-boron filter paper.
In order to achieve the purpose, the invention provides the following technical scheme:
1. the low-boron filter paper is prepared from the following components in percentage by mass: 4-6wt% of glass fiber cotton with fiber diameter of 0.4 μm and 20-30wt% of fiber straightGlass fiber cotton with the diameter of 0.6 mu m, 40-50wt% of glass fiber cotton with the fiber diameter of 1.5 mu m, 6-12wt% of glass fiber cotton with the fiber diameter of 2.6 mu m, 5-10wt% of glass fiber cotton with the fiber diameter of 2.8 mu m and 5-10wt% of alkali-free glass fiber short cut filament with the fiber diameter of 6-8 mu m; the glass fiber cotton with different fiber diameters comprises the following components in percentage by mass: SiO 22：61.5-72.5wt％，Al2O3：5.5-7.5wt％，MgO：2-5.5wt％，Na2O：7-10.5wt％，K2O：3-4.5wt％，CaO：2.5-8wt％，Fe2O3: 0.05 to 0.1wt%, BaO: 0.5-1.0wt% and ZnO: 0.5-1.5 wt%.
2. The preparation method of the low-boron filter paper comprises the following steps:
(1) according to the mass ratio of each component in the low-boron filter paper, adding glass fiber cotton with the fiber diameter of 0.4 mu m, glass fiber cotton with the fiber diameter of 0.6 mu m, glass fiber cotton with the fiber diameter of 1.5 mu m, glass fiber cotton with the fiber diameter of 2.6 mu m, glass fiber cotton with the fiber diameter of 2.8 mu m and alkali-free glass fiber chopped fiber with the fiber diameter of 6-8 mu m into a disperser, and pulping and dispersing under the condition that the pH value is 2.5-3.1 to obtain slurry;
(2) transferring the slurry obtained in the step (1) to a storage pool, diluting to a mass concentration of 2.0-2.5 per mill, and adjusting the pH value to 2.5-3.1; then removing slag from the slurry in the storage tank, and conveying the slurry to a former according to the flow rate ratio of 1.0-1.02 to obtain wet paper;
(3) and (3) drying the wet paper prepared in the step (2) until the water content is less than 0.5%, and preparing the low-boron filter paper.
Preferably, in the step (1), the beating degree is 32-36 DEG SR, and the beating time is 4-8 min.
Preferably, in step (2), the former is a wire-forming paper machine.
Preferably, in the step (3), the drying treatment is carried out for 5-10min at 190 ℃ and 170-.
Preferably, the drying process is by infrared heating.
Preferably, the drying process is performed under negative pressure.
The invention has the beneficial effects that: the invention provides low-boron filter paper and a preparation method thereof, wherein the content of boron in the low-boron filter paper is less than or equal to 0.15%, the phenomenon of boron outgassing (TOC) is not easy to occur in a relatively humid and HF environment, and the environmental pollution is effectively reduced. Through the diameter of the glass fiber cotton used and the using amount of the glass fiber cotton with different diameters in the preparation process, the fibers with different fibers are matched in thickness, so that different net-shaped structures are formed on the finally prepared low-boron filter paper, the filter paper further has different pore diameters, and the low-boron filter paper is guaranteed to have good filtering efficiency, excellent air permeability and high dust holding capacity. Meanwhile, alkali-free glass fiber short shreds with the diameter of 6-8 mu m are added in the preparation process, so that the skeleton function is exerted in the filter paper forming process, and the stiffness and the strength of the final product are improved. In addition, the concentration of the slurry is controlled to be 2.0-2.5 thousandths in the preparation process, no slurry scars, no slurry seeds and no slurry flocculation can be well guaranteed in the forming process, the finally prepared filter paper is enabled to be smoother and smoother in appearance, the flow speed ratio is limited to be 1.0-1.02 (namely the ratio of the speed of the slurry flowing to the paper machine to the speed of the paper machine) in the wet paper forming process, the uniformity of the finally prepared filter paper can be guaranteed, the wet paper is dried under negative pressure in an infrared heating mode, the wet paper is heated more uniformly in a drying room, the moisture content is stable, the specific heat is kept in the drying process, the wet paper can be effectively guaranteed to be heated uniformly, and the finally prepared filter paper has good mechanical tensile strength and folding resistance. The preparation method of the low-boron filter paper adopts a wet forming process, is simple and convenient to operate, has low cost and is suitable for industrial production.
Detailed Description
The preferred embodiments of the present invention will be described in detail below.
Example 1
Preparation of low-boron filter paper
(1) 4 wt% of glass fiber cotton with a fiber diameter of 0.4 μm, 30wt% of glass fiber cotton with a fiber diameter of 0.6 μm, 45 wt% of glass fiber cotton with a fiber diameter of 1.5 μm, 6wt% of glass fiber cotton with a fiber diameter of 2.6 μm, and 8 wt% of glass fiber cotton with a fiber diameter of 2.8 μmAdding 7 wt% of alkali-free glass fiber short shreds with the fiber diameter of 8 mu m into a disperser, pulping and dispersing for 4min at the pH value of 2.7 according to the pulping degree of 32 DEG SR, and obtaining pulp, wherein the glass fiber cotton with different fiber diameters comprises the following components in percentage by mass: SiO 22：71wt％，Al2O3：5.5wt％，MgO：5.5wt％，Na2O：7wt％，K2O：3wt％，CaO：5.7wt％，Fe2O3: 0.1wt%, BaO: 0.7 wt% and ZnO: 1.5 wt%;
(2) transferring the slurry obtained in the step (1) to a storage pool, diluting until the mass concentration is 2.0 per mill, and adjusting the pH value to 2.7; then transferring the pulp in the storage tank to a pre-papermaking tank for storing pulp after deslagging, enabling the pulp to flow on an inclined wire forming paper machine after the pulp is temporarily stopped by a high-level box, wherein the ratio of the speed of the pulp flowing to the paper machine to the speed of the paper machine is 1.0, namely the flow speed ratio is 1.0;
(3) and (3) placing the wet paper prepared in the step (2) in a drying room, and drying the wet paper at 180 ℃ for 7min under negative pressure in an infrared heating mode to prepare the low-boron filter paper, wherein the water content of the low-boron filter paper is 0.2%.
Example 2
Preparation of low-boron filter paper
(1) 6wt% of glass fiber cotton with the fiber diameter of 0.4 mu m, 20 wt% of glass fiber cotton with the fiber diameter of 0.6 mu m, 50wt% of glass fiber cotton with the fiber diameter of 1.5 mu m, 9 wt% of glass fiber cotton with the fiber diameter of 2.6 mu m, 5wt% of glass fiber cotton with the fiber diameter of 2.8 mu m and 10wt% of alkali-free glass fiber short shreds with the fiber diameter of 6 mu m are added into a disperser and are beaten and dispersed for 8min under the condition of the pH value of 2.5 according to the beating degree of 36 DEG SR to obtain a sizing agent, wherein the glass fibers with different fiber diameters consist of the following components in percentage by mass: SiO 22：63.9wt％，Al2O3：7.5wt％，MgO：4.5wt％，Na2O：10.5wt％，K2O：4wt％，CaO：8wt％，Fe2O3: 0.05 wt%, BaO: 0.55 wt% and ZnO: 1 wt%;
(2) transferring the slurry obtained in the step (1) to a storage pool, diluting until the mass concentration is 2.5 per mill, and adjusting the pH value to 2.5; then the pulp in the storage tank is removed slag and transferred to a pre-papermaking tank for storing pulp, the pulp stays for a short time through a head box and then flows freely on an inclined wire forming paper machine, the ratio of the speed of the pulp flowing to the paper machine to the speed of the paper machine is 1.02, namely the flow speed ratio is 1.02;
(3) and (3) placing the wet paper prepared in the step (2) in a drying room, and drying the wet paper at the temperature of 170 ℃ for 10min in an infrared heating mode under negative pressure to prepare the low-boron filter paper, wherein the water content of the low-boron filter paper is 0.3%.
Example 3
Preparation of low-boron filter paper
(1) 5wt% of glass fiber cotton with the fiber diameter of 0.4 mu m, 28 wt% of glass fiber cotton with the fiber diameter of 0.6 mu m, 40 wt% of glass fiber cotton with the fiber diameter of 1.5 mu m, 12wt% of glass fiber cotton with the fiber diameter of 2.6 mu m, 10wt% of glass fiber cotton with the fiber diameter of 2.8 mu m and 5wt% of alkali-free glass fiber short shreds with the fiber diameter of 7 mu m are added into a disperser and are beaten and dispersed for 6min under the condition of pH value of 3.1 according to the beating degree of 34 DEG SR to obtain a sizing agent, wherein the glass fibers with different fiber diameters consist of the following components in percentage by mass: SiO 22：72.5wt％，Al2O3：6.5wt％，MgO：2.4wt％，Na2O：10wt％，K2O：4.5wt％，CaO：2.5wt％，Fe2O3: 0.08 wt%, BaO: 1.0wt% and ZnO: 0.52 wt%;
(2) transferring the slurry obtained in the step (1) to a storage pool, diluting until the mass concentration is 2.3 per mill, and adjusting the pH value to 3.1; then transferring the pulp in the storage tank to a pre-papermaking tank for storing pulp after deslagging, enabling the pulp to flow on an inclined wire forming paper machine after the pulp is temporarily stopped by a high-level box, wherein the ratio of the speed of the pulp flowing to the paper machine to the speed of the paper machine is 1.0, namely the flow speed ratio is 1.0;
(3) and (3) placing the wet paper prepared in the step (2) in a drying room, and drying the wet paper at 190 ℃ for 5min under negative pressure in an infrared heating mode to prepare the low-boron filter paper, wherein the water content of the low-boron filter paper is 0.35%.
The low boron filter papers prepared in examples 1-3 were subjected to performance tests and the results are shown in Table 1.
Table 1 results of performance tests on low boron filter papers prepared in examples 1-3
As shown in Table 1, the low-boron filter paper prepared in the invention has extremely low boron content, good strength, excellent filtering performance, folding resistance and water resistance. The device can be suitable for purifying and dedusting energy-saving clean plants in the industries such as the electronic industry and the semiconductor industry, and is not easy to generate boron outgassing (TOC) phenomenon in relatively humid and FH environments, thereby meeting the requirement of environmental protection.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. The low-boron filter paper is characterized by being prepared from the following components in percentage by mass: 4-6wt% of glass fiber cotton with the fiber diameter of 0.4 μm, 20-30wt% of glass fiber cotton with the fiber diameter of 0.6 μm, 40-50wt% of glass fiber cotton with the fiber diameter of 1.5 μm, 6-12wt% of glass fiber cotton with the fiber diameter of 2.6 μm, 5-10wt% of glass fiber cotton with the fiber diameter of 2.8 μm, and 5-10wt% of alkali-free glass fiber short cut filament with the fiber diameter of 6-8 μm; the glass fiber cotton with different fiber diameters comprises the following components in percentage by mass: SiO 22：61.5-72.5wt%，Al2O3：5.5-7.5wt%，MgO：2-5.5wt%，Na2O：7-10.5wt%，K2O：3-4.5wt%，CaO：2.5-8wt%，Fe2O3: 0.05 to 0.1wt%, BaO: 0.5-1.0wt% and ZnO: 0.5-1.5 wt%.
2. The method for preparing the low-boron filter paper as claimed in claim 1, wherein the method comprises the following steps:
(1) according to the mass ratio of each component in the low-boron filter paper, adding glass fiber cotton with the fiber diameter of 0.4 mu m, glass fiber cotton with the fiber diameter of 0.6 mu m, glass fiber cotton with the fiber diameter of 1.5 mu m, glass fiber cotton with the fiber diameter of 2.6 mu m, glass fiber cotton with the fiber diameter of 2.8 mu m and alkali-free glass fiber chopped fiber with the fiber diameter of 6-8 mu m into a disperser, and pulping and dispersing under the condition that the pH value is 2.5-3.1 to obtain slurry;
(2) transferring the slurry obtained in the step (1) to a storage pool, diluting to a mass concentration of 2.0-2.5 per mill, and adjusting the pH value to 2.5-3.1; then removing slag from the slurry in the storage tank, and conveying the slurry to a former according to the flow rate ratio of 1.0-1.02 to obtain wet paper;
(3) drying the wet paper prepared in the step (2) until the water content is less than 0.5%, and preparing low-boron filter paper; the drying treatment is specifically carried out for 5-10min at the temperature of 170-190 ℃; the drying treatment is by infrared heating; the drying process is carried out under negative pressure.
3. The method of claim 2, wherein in the step (1), the beating degree is 32-36 ° SR and the beating time is 4-8 min.
4. The method of claim 2, wherein in step (2), the former is a wire-forming papermaking machine.
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| CN201810689343.1A CN108797209B (en) | 2018-06-28 | 2018-06-28 | Low-boron filter paper and preparation method thereof |
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|---|---|---|---|
| CN201810689343.1A CN108797209B (en) | 2018-06-28 | 2018-06-28 | Low-boron filter paper and preparation method thereof |
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| CN108797209A CN108797209A (en) | 2018-11-13 |
| CN108797209B true CN108797209B (en) | 2021-07-20 |
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| CN110252031B (en) * | 2019-06-26 | 2020-09-22 | 南京玻璃纤维研究设计院有限公司 | Nuclear grade water filter element filter material and preparation method thereof |
| CN111892330B (en) * | 2020-07-29 | 2022-02-25 | 重庆文理学院 | Superfine glass fiber cotton felt for photocatalytic air purification and preparation method thereof |
| CN112370865B (en) * | 2020-10-28 | 2022-04-29 | 重庆再升科技股份有限公司 | Glass fiber filter material containing aramid fiber and preparation method thereof |
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| CN101830639A (en) * | 2010-02-26 | 2010-09-15 | 重庆再升净化设备有限公司 | Low-boron glass for glass fiber, glass fiber and manufacturing method of glass fiber |
| CN103244793A (en) * | 2013-05-31 | 2013-08-14 | 重庆再升科技股份有限公司 | Novel glass fiber vacuum insulation panel core and preparation method |
| CN103721477A (en) * | 2013-04-22 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | High-strength glass fiber air filter paper and preparation method thereof |
| CN104060497A (en) * | 2014-07-10 | 2014-09-24 | 重庆再升科技股份有限公司 | High-performance light-weight air filtering paper and preparation method thereof |
| CN104088198A (en) * | 2013-03-24 | 2014-10-08 | 苏州维艾普新材料股份有限公司 | High-strength glass fiber-made air-filter paper and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830639A (en) * | 2010-02-26 | 2010-09-15 | 重庆再升净化设备有限公司 | Low-boron glass for glass fiber, glass fiber and manufacturing method of glass fiber |
| CN104088198A (en) * | 2013-03-24 | 2014-10-08 | 苏州维艾普新材料股份有限公司 | High-strength glass fiber-made air-filter paper and preparation method thereof |
| CN103721477A (en) * | 2013-04-22 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | High-strength glass fiber air filter paper and preparation method thereof |
| CN103244793A (en) * | 2013-05-31 | 2013-08-14 | 重庆再升科技股份有限公司 | Novel glass fiber vacuum insulation panel core and preparation method |
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