CN113417133A - Melt-blown fabric electret method - Google Patents
Melt-blown fabric electret method Download PDFInfo
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- CN113417133A CN113417133A CN202110672461.3A CN202110672461A CN113417133A CN 113417133 A CN113417133 A CN 113417133A CN 202110672461 A CN202110672461 A CN 202110672461A CN 113417133 A CN113417133 A CN 113417133A
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- Prior art keywords
- electret
- melt
- blown
- blown fabric
- charging
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a melt-blown fabric electret method, which relates to the technical field of electret treatment, and is characterized in that a high polymer raw material containing 1-3% of electret master batches is adopted for melt-blown spinning, and in the melt-blown production process, a superfine fiber curtain between a spinning die head and a receiving device and melt-blown fabric formed after the superfine fiber curtain and the receiving device are received are respectively subjected to corona charging, wherein the charging voltage of the superfine fiber curtain electret is 20-60 KV, and the electret distance is 10-15 cm; the charging voltage for the melt-blown fabric is 10-20 KV, and the electret distance is 3-8 cm. The invention solves the problem that the filtering efficiency retention time of melt-blown obtained by the existing melt-blown fabric electret method is short.
Description
Technical Field
The invention relates to the technical field of electret treatment, in particular to a melt-blown fabric electret method.
Background
The gauze mask except that coming to carry out mechanical barrier to dust, aerosol through the fibrous structure of cloth, still can catch particles such as bacterium, virus through electrostatic absorption, makes the particle adhere to on the cloth surface and can't see through to reinforcing filtration efficiency, in addition, air resistance can not increase because of electrostatic absorption, does benefit to the high-efficient low resistance that realizes the gauze mask and filters. The electrostatic adsorption effect is mainly that the melt-blown cloth in the middle layer of the mask is subjected to electret treatment, and the melt-blown cloth subjected to the electret treatment can carry charges which can adsorb bacteria, viruses and other particles with the same charges. The existing melt-blown fabric electret method is to add some electret master batches in polypropylene raw materials to increase the charge capture capacity during melt-blown fabric electret treatment, and then carry out electret treatment on the formed melt-blown fabric by adopting methods such as corona charging, triboelectrification or thermal polarization. However, the meltblown obtained by this electret method has a rapid charge decay, and after a few days of storage, the filtration efficiency decreases rapidly, and the desired filtration efficiency cannot be achieved any more, and the retention time of the filtration efficiency is short.
Disclosure of Invention
The invention aims to provide a melt-blown fabric electret method which can solve the problem that the melt-blown filtration efficiency retention time obtained by the existing melt-blown fabric electret method is short.
In order to solve the problems, the invention adopts the technical scheme that: the melt-blown fabric electret method adopts high polymer raw materials containing 1-3% of electret master batches to carry out melt-blown spinning, and carries out corona charging on a superfine fiber curtain between a spinning die head and a receiving device and melt-blown fabric formed after the superfine fiber curtain and the receiving device are received in the melt-blown production process, wherein the charging voltage of the superfine fiber curtain electret is 20-60 KV, and the electret distance is 10-15 cm; the charging voltage for the melt-blown fabric is 10-20 KV, and the electret distance is 3-8 cm.
In the technical scheme of the meltblown electret method, a more specific technical scheme may also be that: the electret time of the melt-blown fabric is more than or equal to 5 s.
Furthermore, the electret time of the melt-blown fabric is 10-20 s.
Further, the corona charging is constant voltage corona charging.
Furthermore, the charging temperature is 60-70 ℃, and the ambient humidity is 35-60%
Furthermore, the electret master batch is tourmaline or gas silicon.
Furthermore, the average grain diameter of the electret master batch is less than 0.3 μm.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the melt-blown electrets in two different forms in the melt-blown production process are subjected to corona charging, so that the content of deep trap charges in the electrets can be greatly increased, and meanwhile, the addition of the electret master batches can store the charges for a long time and prolong the retention time of the filtering efficiency; the limitation of electret voltage and distance of different forms of electrets can increase charge density and improve filtering efficiency, and can ensure higher air permeability of melt-blown cloth after electret, thereby obtaining high-efficiency and low-resistance filtering performance.
2. The time of electret of the melt-blown cloth is long enough, the charge density and the stability can be improved, the surface charge is uniformly distributed, the set range of the electret time can increase the charge density, the adsorption and polarization effects of the melt-blown cloth are enhanced, and the air permeability of the melt-blown cloth can not be reduced.
3. The charge storage stability by adopting the constant voltage corona charging is high.
4. Tourmaline or aerosil is used as the electret master batch, so that the electret efficiency is high and the charge storage is durable; the particle size range is beneficial to uniform dispersion, so that the stored charge is uniformly distributed.
Detailed Description
The invention is further described in detail below with reference to the following examples:
example 1
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass percentage of the tourmaline is 1%, and the average grain diameter of the tourmaline is less than 0.3 mu m. In the melt-blown production process, the melt-blown electrets in two different forms are subjected to electret treatment by adopting constant-voltage corona charging, the charging temperature is controlled to be 60-65 ℃, and the environmental humidity is 35-45%. Firstly, carrying out constant voltage corona charging on a row of superfine fiber screens in a melt trickle blowing and drawing manner between a spinning die head and a receiving device, wherein the charging voltage is 20KV, and the electret distance is 10 cm; and then carrying out deepening electret treatment on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, and also adopting constant-voltage corona charging, wherein the charging voltage is 10 KV, the electret distance is 3 cm, and the electret time is 20 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 99.8 percent, and the air flow resistance is 29.2 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the aged sample reaches 95.7%.
Example 2
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass ratio of the tourmaline is 2%, and the average grain diameter of the tourmaline is less than 0.3 mu m. In the melt-blown production process, the melt-blown electrets in two different forms are subjected to electret treatment by adopting constant-voltage corona charging, the charging temperature is controlled to be 60-65 ℃, and the ambient humidity is 40-50%. Firstly, carrying out constant voltage corona charging on a row of superfine fiber screens in a melt trickle blowing and drawing manner between a spinning die head and a receiving device, wherein the charging voltage is 40KV, and the electret distance is 12 cm; and then carrying out deepening electret treatment on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, and also adopting constant-voltage corona charging, wherein the charging voltage is 15 KV, the electret distance is 5cm, and the electret time is 15 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 99.4 percent, and the air flow resistance is 30.3 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the aged sample reaches 93.9%.
Example 3
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass percentage of the tourmaline is 3%, and the average grain diameter of the tourmaline is less than 0.3 mu m. In the melt-blown production process, the melt-blown electrets in two different forms are subjected to electret treatment by adopting constant-voltage corona charging, the charging temperature is controlled to be 65-70 ℃, and the environmental humidity is 50-60%. Firstly, carrying out constant voltage corona charging on a row of superfine fiber screens in a melt trickle blowing and drawing manner between a spinning die head and a receiving device, wherein the charging voltage is 60KV, and the electret distance is 15 cm; and then carrying out deepening electret treatment on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, and also adopting constant-voltage corona charging, wherein the charging voltage is 20KV, the electret distance is 8cm, and the electret time is 10 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 99.2 percent, and the air flow resistance is 31.4 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the aged sample reaches 92.6 percent.
Example 4
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass percentage of gas and silicon is 1%, and the average grain diameter of the gas and silicon is less than 0.3 mu m. In the melt-blown production process, the melt-blown electrets in two different forms are subjected to electret treatment by adopting constant-voltage corona charging, the charging temperature is controlled to be 65-70 ℃, and the environmental humidity is 50-60%. Firstly, carrying out constant voltage corona charging on a row of superfine fiber screens in a melt trickle blowing and drawing manner between a spinning die head and a receiving device, wherein the charging voltage is 50KV, and the electret distance is 12 cm; and then carrying out deepening electret treatment on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, and also adopting constant-voltage corona charging, wherein the charging voltage is 18 KV, the electret distance is 8cm, and the electret time is 5 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 99.1 percent, and the air flow resistance is 31.7 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the sample after aging reaches 91.4%.
Example 5
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass ratio of gas to silicon is 1.5%, and the average grain diameter of the gas to silicon is less than 0.3 mu m. In the melt-blown production process, the melt-blown electrets in two different forms are subjected to electret treatment by adopting constant-voltage corona charging, the charging temperature is controlled to be 60-65 ℃, and the environmental humidity is 45-55%. Firstly, carrying out constant voltage corona charging on a row of superfine fiber screens in a melt trickle blowing and drawing manner between a spinning die head and a receiving device, wherein the charging voltage is 35KV, and the electret distance is 10 cm; and then carrying out deepening electret treatment on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, and also adopting constant-voltage corona charging, wherein the charging voltage is 15 KV, the electret distance is 5cm, and the electret time is 15 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 99.5 percent, and the air flow resistance is 30.8 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the aged sample reaches 94.4 percent.
Example 6
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass percentage of gas and silicon is 3%, and the average grain diameter of the gas and silicon is less than 0.3 mu m. In the melt-blown production process, the melt-blown electrets in two different forms are subjected to electret treatment by adopting constant-voltage corona charging, the charging temperature is controlled to be 60-65 ℃, and the environmental humidity is 35-45%. Firstly, carrying out constant voltage corona charging on a row of superfine fiber screens in a melt trickle blowing and drawing manner between a spinning die head and a receiving device, wherein the charging voltage is 50KV, and the electret distance is 12 cm; and then carrying out deepening electret treatment on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, and also adopting constant-voltage corona charging, wherein the charging voltage is 10 KV, the electret distance is 5cm, and the electret time is 20 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 99.6 percent, and the air flow resistance is 30.2 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the aged sample reaches 95.2%.
Comparative example 1
The melt-blown fabric electret method of the embodiment adopts polypropylene and tourmaline as high polymer raw materials to carry out melt-blown spinning, wherein the mass percentage of the tourmaline is 1%, and the average grain diameter of the tourmaline is less than 0.3 mu m. And under the conditions that the charging temperature is 60-65 ℃ and the environmental humidity is 35-45%, carrying out constant-voltage corona charging on the melt-blown fabric formed after the superfine fiber curtain is received by the receiving device, wherein the charging voltage is 10 KV, the electret distance is 3 cm, and the electret time is 20 s.
In the embodiment, the finished melt-blown fabric is placed for 24 hours at room temperature, the filtering efficiency of the finished melt-blown fabric on particles with the particle size of 0.3 mu m reaches 95.1 percent, and the air flow resistance is 29.2 Pa; the sample is placed at (23 +/-3) DEG C and (85 +/-5)% relative humidity for 30 days and then is placed at room temperature for 4 hours, and the filtration efficiency of the sample after aging reaches 79.7%.
The melt-blown fabric prepared by the method has good filtering performance, good filtering efficiency durability and lower air flow resistance.
Claims (7)
1. A melt-blown fabric electret method is characterized in that: carrying out melt-blown spinning by adopting a high polymer raw material containing 1-3% of electret master batch, and respectively carrying out corona charging on a superfine fiber curtain between a spinning die head and a receiving device and melt-blown cloth formed after the superfine fiber curtain and the receiving device are received in the melt-blown production process, wherein the charging voltage of the electret of the superfine fiber curtain is 20-60 KV, and the electret distance is 10-15 cm; the charging voltage for the melt-blown fabric is 10-20 KV, and the electret distance is 3-8 cm.
2. The meltblown electret method of claim 1, wherein: the electret time of the melt-blown fabric is more than or equal to 5 s.
3. The meltblown electret method of claim 2, wherein: the electret time of the melt-blown fabric is 10-20 s.
4. The meltblown electret method of claim 3, wherein: the corona charging is constant voltage corona charging.
5. The meltblown electret method of claim 4, wherein: the charging temperature is 60-70 ℃, and the ambient humidity is 35-60%.
6. The meltblown electret method of any of claims 1-5 wherein: the electret master batch is tourmaline or gas silicon.
7. The meltblown electret method of claim 3, wherein: the average grain diameter of the electret master batch is less than 0.3 mu m.
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| CN202110672461.3A CN113417133A (en) | 2021-06-17 | 2021-06-17 | Melt-blown fabric electret method |
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| CN202110672461.3A CN113417133A (en) | 2021-06-17 | 2021-06-17 | Melt-blown fabric electret method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6365088B1 (en) * | 1998-06-26 | 2002-04-02 | Kimberly-Clark Worldwide, Inc. | Electret treatment of high loft and low density nonwoven webs |
| CN106555277A (en) * | 2016-12-02 | 2017-04-05 | 武汉纺织大学 | The device and method of composite ultrafine fiber beam is prepared using melt-blown and electrostatic spinning |
| CN111733527A (en) * | 2020-07-28 | 2020-10-02 | 常州金纬管道设备制造有限公司 | Melt-blown fabric production line, starting method and melt-blown fabric production method |
| CN111910274A (en) * | 2020-09-02 | 2020-11-10 | 江科 | Device and method for jet fiber electrostatic electret and fiber drawing of non-woven fabric by melt-blowing method |
| CN112267213A (en) * | 2020-11-04 | 2021-01-26 | 宁波格林美孚新材料科技有限公司 | Melt-blown fabric preparation facilities |
| CN112941723A (en) * | 2021-01-26 | 2021-06-11 | 南京捷纳思新材料有限公司 | Preparation method of electret treated modified polypropylene melt-blown fabric |
-
2021
- 2021-06-17 CN CN202110672461.3A patent/CN113417133A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6365088B1 (en) * | 1998-06-26 | 2002-04-02 | Kimberly-Clark Worldwide, Inc. | Electret treatment of high loft and low density nonwoven webs |
| CN106555277A (en) * | 2016-12-02 | 2017-04-05 | 武汉纺织大学 | The device and method of composite ultrafine fiber beam is prepared using melt-blown and electrostatic spinning |
| CN111733527A (en) * | 2020-07-28 | 2020-10-02 | 常州金纬管道设备制造有限公司 | Melt-blown fabric production line, starting method and melt-blown fabric production method |
| CN111910274A (en) * | 2020-09-02 | 2020-11-10 | 江科 | Device and method for jet fiber electrostatic electret and fiber drawing of non-woven fabric by melt-blowing method |
| CN112267213A (en) * | 2020-11-04 | 2021-01-26 | 宁波格林美孚新材料科技有限公司 | Melt-blown fabric preparation facilities |
| CN112941723A (en) * | 2021-01-26 | 2021-06-11 | 南京捷纳思新材料有限公司 | Preparation method of electret treated modified polypropylene melt-blown fabric |
Non-Patent Citations (2)
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