CN109653019B - Preparation process of fully synthetic fiber F8-grade air filter material - Google Patents
Preparation process of fully synthetic fiber F8-grade air filter material Download PDFInfo
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- CN109653019B CN109653019B CN201910063272.9A CN201910063272A CN109653019B CN 109653019 B CN109653019 B CN 109653019B CN 201910063272 A CN201910063272 A CN 201910063272A CN 109653019 B CN109653019 B CN 109653019B
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- 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
- D21H13/02—Synthetic cellulose fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- 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
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
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- 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
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Filtering Materials (AREA)
Abstract
A preparation method of full synthetic fiber F8 grade air filter material comprises mixing two synthetic fibers with different diameters and superfine fiber, adding water, stirring, and dispersing to obtain slurry with pH of 2.5-3.0; preparing the slurry into a filter material by the existing wet papermaking forming method, drying, coating acrylic resin liquid on two surfaces of the dried filter material, and drying again to obtain the acrylic resin composite filter material. The fully synthetic fiber is of a solid structure, and cannot deform in humid weather and the phenomena of obvious resistance rise and deformation of a filter in haze weather; the synthetic fiber raw material contains low-diameter fibers and superfine fibers, so that a larger specific surface area, a larger porosity and a smaller pore size can be provided, and the filtering efficiency is obviously improved; the surface of the synthetic fiber is of a smooth structure, so that the synthetic fiber is easy to back-blow clean, and the service life is greatly prolonged; the product can fill the blank of the fully synthetic fiber air filter material product in the domestic filter industry and solve the problem of key materials for air filtration in the haze environment of China.
Description
Technical Field
The invention relates to preparation of an air filter material, in particular to a process for preparing a fully synthetic fiber F8-grade air filter material by taking synthetic fibers as a basic skeleton.
Background
Haze, common in cities, is the result of specific climatic conditions interacting with human activities. Economic and social activities of high-density population inevitably discharge a large amount of fine particulate matters (PM2.5), once the discharge exceeds the atmospheric circulation capacity and the bearing capacity, the concentration of the fine particulate matters is continuously accumulated, and at the moment, if the influence of calm weather and the like is caused, the haze in a large range is extremely easy to appear. Haze can produce adverse effect to the industrial system of reinforcing bar indisputable bone, for example, in engine system, to the haze, ordinary air cleaner on the air intake manifold plays no effect at all, and the car runs in the haze (as long as the engine has started), and the haze granule will gush in the engine combustion chamber in large numbers wantonly to kick. Moreover, as the haze particles are industrial products, particularly mineral industrial products, the particles are very sharp and cannot be melted by common high temperature. After entering an engine cylinder, a large amount of haze particles can be accumulated in any place of the whole combustion chamber, and when the piston runs up and down at a high speed, the accumulated haze particles are actually equal to a high-speed grinding machine and continuously cause mechanical damage to the cylinder wall.
The existing air filter is made of plant fiber air filter material, and the application case survey in the last 5 years shows a large number of problems: 1. the plant fiber is a surface hydrophilic substance and has a hollow structure, and under the condition of high humidity in haze days, the plant fiber absorbs moisture and stretches, so that the diameter of the fiber is thickened, the porosity is reduced, the air permeability is reduced, and the resistance is obviously increased; 2. the diameter of common plant fiber is about 20 μ M generally, the prepared air filter material is generally in the grade of M5-M6, the efficiency is low, and a large amount of dust enters the interior of an engine and an aftertreatment system, so that the problems of large-area engine abrasion and aftertreatment blockage are caused; 3. under the conditions of humidity and liquid pollutant, the plant fiber absorbs moisture, not only swells, but also can be lengthened, so that the filter element of the filter is seriously deformed and seriously folded inside, and the service life is seriously influenced; 4. through analysis of a large number of filter elements with short service lives, the failure of the filter material caused by the mixing action of liquid pollutants and solid pollutants is also one of important reasons. The interaction of the two is adhered to plant fibers like 'paste', so that dust is difficult to blow back, the times of blowback cleaning are reduced, and the service life is shortened.
Therefore, the domestic air filtering material still stays at the traditional wood pulp fiber level at present, the product filtering efficiency is low, the resistance is large, the service life is short, and the product upgrading is difficult due to unsmooth communication of upstream and downstream industrial chains and lack of design means. Meanwhile, foreign air filtration products are designed according to European and American working conditions, and show serious water and soil inadequacy in the environment with serious haze in China, and the production process and the technical development of domestic advanced products are very slow due to technical blockade. Therefore, in order to meet the existing working condition environment, an air filtering material with high efficiency and resistance to liquid pollutants such as water vapor, acid, oil and the like is urgently needed, and the development of a fully synthetic fiber air filtering material is urgent.
Disclosure of Invention
The invention aims to provide a preparation process of a fully synthetic fiber F8 grade air filter material which takes synthetic fibers as base materials and has high efficiency and high moisture resistance aiming at the defects of the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a preparation process of a fully synthetic fiber F8 grade air filter material comprises the following steps:
a. taking the following raw materials in percentage by weight: (1.3-1.7) 25-35% of synthetic fiber with the diameter of Dx6 mm, (0.6-0.8) 50-60% of synthetic fiber with the diameter of Dx6 mm and 12-18% of superfine fiber, wherein the sum of the three components is 100%, water with the pH value of 2.6-3.2 which is 20-30 times of the weight of the raw materials is added into the raw materials, the raw materials are mixed and stirred to be dispersed into pulp, and the pH value of the pulp is ensured to be 2.5-3.0;
b. preparing the slurry into a filter material according to the existing wet papermaking forming method;
c. the filter material sequentially passes through three groups of drying cylinders at a paper feeding speed of 35-45m/min, the steam temperature in the three groups of drying cylinders is 90-110 ℃, 115-125 ℃ and 125-145 ℃ in sequence, so as to dry the filter material, and the water content of the dried filter material is less than 5%;
d. coating acrylic resin liquid on two surfaces of the dried filter material;
e. the filter material coated with the acrylic resin liquid sequentially passes through two groups of drying cylinders at a paper feeding speed of 35-45m/min, and the steam temperature in the two groups of drying cylinders is 90-110 ℃ and 120-140 ℃ sequentially so as to dry the filter material, so that the water content of the dried filter material is less than 5%.
The acrylic resin liquid in the step d is prepared by mixing and stirring 1 part of acrylic resin and 2 parts of water in parts by weight.
Preferably, the superfine fibers in the step a are glass wool.
Preferably, the steam temperature in the three groups of drying cylinders in the step c is 100 ℃, 120 ℃ and 135 ℃ in sequence.
Preferably, the steam temperature in the two groups of drying cylinders in the step e is 100 ℃ and 130 ℃ in sequence.
The base material of the fully synthetic fiber product is synthetic fiber, so that the reaction of fiber water absorption and wetting does not exist, the integrity of the filter material structure can be effectively kept in a haze environment, and the high efficiency and the high moisture resistance of the material can be synchronously realized by ensuring the filtering precision of the material in a mode of adding superfine fiber. However, the raw materials of the invention contain superfine fiber and synthetic fiber with smaller size, and the problems of easy generation of bubbles, difficult dispersion, flocculation and the like in the defibering and dispersing process are solved, the method adds water with stronger acidity into the raw materials for dispersing and beating treatment before the wet papermaking forming method, so that the concentration of the raw materials in the wet papermaking forming process is ultralow (less than 0.05 percent), and the flocculation phenomenon of the materials is not generated in the preparation process; on the other hand, the synthetic fiber is easy to break and has poor bonding strength in the preparation process, the method adopts acrylic resin liquid to coat the formed and dried filter material, and simultaneously double-melting-point synthetic fiber is added in the raw material to enhance the strength of the filter paper.
Compared with the prior art, the invention has the following advantages: 1. the fully synthetic fiber is of a solid structure, has better moisture resistance, does not have any shape change in humid weather, and can not cause the reduction of gaps and the deformation of filter materials when used as materials, so that the phenomena of obvious resistance rise and filter deformation can not occur in haze weather; 2. the synthetic fiber raw material contains fibers with low diameter, the applied synthetic fiber main body is about 6 mu m, and simultaneously contains a large amount of superfine fibers smaller than 1 mu m, compared with the plant fibers with the diameter of 20 mu m, the synthetic fiber raw material can provide larger specific surface area, porosity and smaller pore size, and the filtering efficiency is obviously improved; 3. the surface of the synthetic fiber is of a smooth structure, so that the synthetic fiber is easier to back-blow clean compared with the plant fiber, and the service life is relatively prolonged.
The F8-grade air filtering material product prepared by the method has high efficiency and high moisture resistance, the research and development of the product can effectively deal with the long-term persistent haze weather in China, the protection of the internal components of an industrial system is realized, the loss caused by haze is reduced, the blank of the fully synthetic fiber air filtering material product in the domestic filter industry is filled, the problem of key materials for air filtering in the haze environment in China is solved, and the development of the filtering and separating industry in China is powerfully promoted.
Drawings
FIG. 1 is a photograph showing a filter made of the product of the present invention before and after use.
Wherein: the left picture is the photograph before use and the right picture is the photograph after use.
Fig. 2 is a photograph showing a filter made of a conventional plant fiber F8 filter before and after use.
Wherein: the left picture is the photograph before use and the right picture is the photograph after use.
Detailed Description
Example 1
Taking the following raw materials in percentage by weight: (1.3-1.7) 25% of synthetic fiber with the diameter of Dx6 mm, (0.6-0.8) 60% of synthetic fiber with the diameter of Dx6 mm and 15% of glass wool, wherein water with the pH value of 2.6 which is 20 times of the weight of the raw materials is added into the raw materials, mixed and stirred to form slurry, and the pH value of the slurry is ensured to be 2.5; preparing the slurry into a filter material according to the existing wet papermaking forming method; the filter material sequentially passes through three groups of drying cylinders at a paper feeding speed of 35m/min, and the steam temperature in the three groups of drying cylinders is 90-110 ℃, 115-125 ℃ and 125-145 ℃ in sequence so as to dry the filter material, so that the water content of the dried filter material is less than 5%; and (2) coating acrylic resin liquid (consisting of 1 part of acrylic resin and 2 parts of water in parts by weight) on two surfaces of the dried filter material, and sequentially passing through two groups of drying cylinders at a paper feeding speed of 35m/min, wherein the steam temperature in the two groups of drying cylinders is 90-110 ℃ and 120-140 ℃ in sequence to dry the filter material, so that the water content of the dried filter material is less than 5%, and the fully synthetic fiber F8 grade air filter material is obtained.
Example 2
Taking the following raw materials in percentage by weight: (1.3-1.7) 35% of synthetic fiber with the diameter of D multiplied by 6mm, (0.6-0.8) 53% of synthetic fiber with the diameter of D multiplied by 6mm and 12% of glass wool, 30 times of water with the pH value of 3.2 is added into the raw materials, mixed and stirred into slurry, and the pH value of the slurry is ensured to be 3.0; preparing the slurry into a filter material according to the existing wet papermaking forming method; the filter material sequentially passes through three groups of drying cylinders at a paper feeding speed of 45m/min, and the steam temperature in the three groups of drying cylinders is 90-110 ℃, 115-125 ℃ and 125-145 ℃ in sequence so as to dry the filter material, so that the water content of the dried filter material is less than 5%; and (2) coating acrylic resin liquid (consisting of 1 part of acrylic resin and 2 parts of water in parts by weight) on two surfaces of the dried filter material, and sequentially passing through two groups of drying cylinders at a paper feeding speed of 45m/min, wherein the steam temperature in the two groups of drying cylinders is 90-110 ℃ and 120-140 ℃ in sequence to dry the filter material, so that the water content of the dried filter material is less than 5%, and the fully synthetic fiber F8 grade air filter material is obtained.
Example 3
Taking the following raw materials in percentage by weight: (1.3-1.7) 32% of synthetic fiber with the diameter of Dx6 mm, (0.6-0.8) 50% of synthetic fiber with the diameter of Dx6 mm and 18% of glass wool, adding water with the pH value of 3.0 which is 25 times of the weight of the raw materials into the raw materials, mixing, stirring to form slurry, and ensuring that the pH value of the slurry is 2.8; preparing the slurry into a filter material according to the existing wet papermaking forming method; the filter material sequentially passes through three groups of drying cylinders at a paper feeding speed of 40m/min, and the steam temperature in the three groups of drying cylinders is 90-110 ℃, 115-125 ℃ and 125-145 ℃ in sequence so as to dry the filter material, so that the water content of the dried filter material is less than 5%; and (2) coating acrylic resin liquid (consisting of 1 part of acrylic resin and 2 parts of water in parts by weight) on two surfaces of the dried filter material, and sequentially passing through two groups of drying cylinders at a paper feeding speed of 40m/min, wherein the steam temperature in the two groups of drying cylinders is 90-110 ℃ and 120-140 ℃ in sequence to dry the filter material, so that the water content of the dried filter material is less than 5%, and the fully synthetic fiber F8 grade air filter material is obtained.
Example 4
1. Performance parameters of the product
The technical index parameters of the product are shown in the following table 1, the product is an F8-grade air filter material, and compared with the conventional plant fiber F8 air filter material (containing about 5% of synthetic fibers), the product is shown in the following table 1 in combination: the traditional plant fiber F8 grade air filter material has the bursting strength obviously lower than that of the product, particularly the wet bursting strength, the product of the invention has little change, and the plant fiber material has obvious reduction of the wet bursting strength, which shows that the moisture resistance of the fully synthetic fiber F8 grade air filter material of the product is obviously superior to that of the traditional plant fiber F8 grade air filter material, the use moisture deformation resistance is obviously improved, the service life of the filter can be greatly prolonged, and the application problem in severe environment can be solved.
TABLE 1 comparison table of the product parameters of the present invention and the existing traditional equivalent filter material
2. Effects of use
After the filter made of the fully synthetic fiber F8 grade air filter material is used for 10 kilometers, referring to fig. 1, a filter element of the filter is not deformed after the filter is used; after a filter made of the conventional plant fiber F8 grade air filter material is used for 2 kilometers, referring to fig. 2, the filter element of the filter is seriously deformed. As can be seen from fig. 1 and 2: the service life of the filter made of the traditional plant fiber F8 grade air filter material is far shorter than that of the full synthetic fiber F8 grade air filter material, and the full synthetic fiber F8 grade air filter has no deformation, can keep the original shape and greatly prolongs the service life.
Claims (5)
1. A preparation process of a fully synthetic fiber F8-grade air filter material is characterized by comprising the following steps:
a. taking the following raw materials in percentage by weight: (1.3-1.7) 25-35% of synthetic fiber with the diameter of Dx6 mm, (0.6-0.8) 50-60% of synthetic fiber with the diameter of Dx6 mm and 12-18% of superfine fiber, adding water with the pH value of 2.6-3.2 which is 20-30 times of the weight of the raw materials into the raw materials, mixing, stirring to form slurry, and ensuring the pH value of the slurry to be 2.5-3.0;
b. preparing the slurry into a filter material according to the existing wet papermaking forming method;
c. the filter material sequentially passes through three groups of drying cylinders at a paper feeding speed of 35-45m/min, the steam temperature in the three groups of drying cylinders is 90-110 ℃, 115-125 ℃ and 125-145 ℃ in sequence, so as to dry the filter material, and the water content of the dried filter material is less than 5%;
d. coating acrylic resin liquid on two surfaces of the dried filter material;
e. the filter material coated with the acrylic resin liquid sequentially passes through two groups of drying cylinders at a paper feeding speed of 35-45m/min, and the steam temperature in the two groups of drying cylinders is 90-110 ℃ and 120-140 ℃ sequentially so as to dry the filter material, so that the water content of the dried filter material is less than 5%.
2. The process for preparing fully synthetic fiber F8 grade air filter material according to claim 1, wherein the acrylic resin solution in step d is prepared by mixing and stirring 1 part of acrylic resin and 2 parts of water in parts by weight.
3. The process for preparing fully synthetic fiber F8 grade air filter material according to claim 1, wherein the superfine fiber in step a is glass wool.
4. The process for preparing grade F8 air filter material of claim 1, wherein the steam temperature in the three drying cylinders in step c is 100 ℃, 120 ℃ and 135 ℃ in sequence.
5. The process for preparing grade F8 air filter material of claim 1, wherein the steam temperature in the two groups of drying cylinders in step e is 100 ℃ and 130 ℃ in sequence.
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| CN201910063272.9A CN109653019B (en) | 2019-01-23 | 2019-01-23 | Preparation process of fully synthetic fiber F8-grade air filter material |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3617442A (en) * | 1968-09-30 | 1971-11-02 | Alfred A Hurschman | Paper-making means and method |
| US3622445A (en) * | 1967-05-18 | 1971-11-23 | Koninkl Papierfabriken Van Gel | Glass-fiber webs employing glass fibers with diameters of3{14 15 microns |
| CN1456384A (en) * | 2003-05-20 | 2003-11-19 | 华南理工大学 | Fibrous composite filtering materials of engine and preparing method thereof |
| CN102728144A (en) * | 2012-06-27 | 2012-10-17 | 吕凯 | Battery capacitor membrane filtration material prepared by using wet papermaking forming process, and preparation method thereof |
| CN103100264A (en) * | 2013-02-06 | 2013-05-15 | 吕凯 | Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material |
-
2019
- 2019-01-23 CN CN201910063272.9A patent/CN109653019B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3622445A (en) * | 1967-05-18 | 1971-11-23 | Koninkl Papierfabriken Van Gel | Glass-fiber webs employing glass fibers with diameters of3{14 15 microns |
| US3617442A (en) * | 1968-09-30 | 1971-11-02 | Alfred A Hurschman | Paper-making means and method |
| CN1456384A (en) * | 2003-05-20 | 2003-11-19 | 华南理工大学 | Fibrous composite filtering materials of engine and preparing method thereof |
| CN102728144A (en) * | 2012-06-27 | 2012-10-17 | 吕凯 | Battery capacitor membrane filtration material prepared by using wet papermaking forming process, and preparation method thereof |
| CN103100264A (en) * | 2013-02-06 | 2013-05-15 | 吕凯 | Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material |
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Effective date of registration: 20220831 Address after: 31# Factory Building, Tianneng Chain Innovation Industrial Park, Meishan Town, Changxing County, Huzhou City, Zhejiang Province, 313100 Patentee after: Magnesium (Zhejiang) New Materials Co.,Ltd. Address before: No. 701, Unit 7, Building B, Yinxinyuan, Eling Street, Yinjiang Tujia and Miao Autonomous County, Tongren City, Guizhou Province, 555200 Patentee before: Yin Jinghua Patentee before: Zhou Xiaobing |
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