CN112813583A - Melt-blown fabric production process method - Google Patents
Melt-blown fabric production process method Download PDFInfo
- Publication number
- CN112813583A CN112813583A CN202011613033.5A CN202011613033A CN112813583A CN 112813583 A CN112813583 A CN 112813583A CN 202011613033 A CN202011613033 A CN 202011613033A CN 112813583 A CN112813583 A CN 112813583A
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- CN
- China
- Prior art keywords
- electret
- production process
- filter
- hot air
- fabric production
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/544—Olefin series
Abstract
The invention discloses a melt-blown fabric production process method, and relates to the technical field of materials for mask production. Through the improvement of the process steps and parameters, particularly through the adjustment of the size density of the spinneret holes, the corresponding angle between the hot air spraying direction and the spinneret holes, the hot air temperature and the flow rate, the produced fibers are thinner and more uniform, have larger specific surface area and higher porosity, and are combined with subsequent specific electret voltage to finally obtain the melt-blown fabric with more excellent filtering efficiency and air flow resistance performance.
Description
Technical Field
The invention relates to the technical field of materials for mask production, in particular to a production process of melt-blown cloth.
Background
The melt-blown cloth is the most central material for mask production, polypropylene is used as a main production raw material, and the diameter of the fiber can reach 1-5 microns. Because the superfine fiber with the unique capillary structure increases the number and the surface area of the fiber per unit area, the melt-blown fabric has good filtering property, shielding property, heat insulation property, oil absorption property and the like, and is widely applied to the fields of air, liquid filtering materials, isolating materials, absorbing materials, medical and industrial mask materials, heat-insulating materials, oil absorption materials, wiping cloth and the like.
However, as the technology and living standards have increased, the requirements for the various specifications of meltblown fabrics with the above-mentioned widespread use have also increased, in particular with regard to their filtration efficiency and air flow resistance.
Disclosure of Invention
The invention provides a production process method of meltblown fabric, and the meltblown fabric produced by the method has excellent filtration efficiency and air flow resistance performance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
it comprises the following steps:
A. weighing the following raw materials in parts by weight: 95-97% of polypropylene resin and 3-5% of electret master batch;
B. putting the raw materials into a stirrer, and stirring and mixing to obtain a mixed master batch;
C. then, heating and melting the mixed master batch in the process of conveying materials by a screw extruder to obtain a molten material;
D. then, filtering the molten material through a filter to obtain a filtered material; wherein the aperture of the filter screen on the filter is 150 meshes;
E. homogenizing the filter material by a homogenizer to obtain a homogenized material;
F. then, the homogenized material is subjected to spinning through a nozzle, hot air drafting and cold air cooling and blowing to obtain superfine fibers; wherein the nozzle has 1500 spinneret orifices per meter on average, the direction of the hot air and the spinneret orifices form an angle of 50b, the temperature of the hot air is 200-250 ℃, and the flow rate is 12000-14000 m/min;
G. then, collecting the superfine fiber filaments on a condensing net roller, and carding to form a net to obtain a nascent non-woven fabric;
H. then, electret the nascent non-woven fabric through an electret to obtain a non-woven fabric with charges; wherein, in the electret process, the electret voltage is 3-6 ten thousand volts;
I. then, the obtained non-woven fabric with charges is wound and packaged by a winding machine; wherein the coiling speed is 15 m/min.
In the above technical solution, a more specific technical solution may also be: the steps A to I are carried out on the same production line continuously without interruption.
Further, the screw diameter of the screw rod extruder is 100 mm-120 mm, and the length/diameter ratio is 30.
Furthermore, the filter is provided with 3 layers of filter screens.
Further, the temperature of the hot air is 250 ℃, and the flow rate is 13000 m/min.
Further, the electret voltage is 4 ten thousand volts.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
according to the invention, through improvement of process steps and parameters, particularly through adjustment of the size density of the spinneret orifices, the corresponding angle between the hot air jetting direction and the spinneret orifices, the temperature and the flow rate of the hot air, the obtained fibers are thinner and more uniform, have larger specific surface area and higher porosity, and are combined with subsequent specific electret voltage to finally obtain the meltblown fabric with more excellent filtering efficiency and air flow resistance performance.
Detailed Description
The present invention is further described in detail below with reference to examples;
example 1
A. Weighing the following raw materials in parts by weight: 95% of polypropylene resin and 5% of electret master batch;
B. putting the raw materials into a stirrer, and stirring and mixing to obtain a mixed master batch;
C. then, heating and melting the mixed master batch in the process of conveying materials by a screw extruder to obtain a molten material; wherein the screw diameter of the screw rod extruder is 100mm, and the length/diameter ratio is 30;
D. then, filtering the molten material through a filter to obtain a filtered material; wherein the aperture of the filter screen on the filter is 150 meshes;
E. homogenizing the filter material by a homogenizer to obtain a homogenized material;
F. then, the homogenized material is subjected to spinning through a nozzle, hot air drafting and cold air cooling and blowing to obtain superfine fibers; wherein the nozzle has 1500 spinneret orifices per meter on average, the direction of the hot air is 50b angle with the spinneret orifices, the temperature of the hot air is 250 ℃, and the flow rate is 13000 m/min;
G. then, collecting the superfine fiber filaments on a condensing net roller, and carding to form a net to obtain a nascent non-woven fabric;
H. then, electret the nascent non-woven fabric through an electret to obtain a non-woven fabric with charges; in the electret process, the electret voltage is 4 ten thousand volts;
I. then, the obtained non-woven fabric with charges is wound and packaged by a winding machine; wherein the coiling speed is 15 m/min;
wherein, the steps A to I are continuously carried out on the same production line.
Example 2
A. Weighing the following raw materials in parts by weight: 96% of polypropylene resin and 4% of electret master batch;
B. putting the raw materials into a stirrer, and stirring and mixing to obtain a mixed master batch;
C. then, heating and melting the mixed master batch in the process of conveying materials by a screw extruder to obtain a molten material; wherein the screw diameter of the screw rod extruder is 110mm, and the length/diameter ratio is 30;
D. then, filtering the molten material through a filter to obtain a filtered material; wherein the aperture of the filter screen on the filter is 150 meshes;
E. homogenizing the filter material by a homogenizer to obtain a homogenized material;
F. then, the homogenized material is subjected to spinning through a nozzle, hot air drafting and cold air cooling and blowing to obtain superfine fibers; wherein the nozzle has 1500 spinneret orifices per meter on average, the direction of the hot air is at an angle of 50b with the spinneret orifices, the temperature of the hot air is 200 ℃, and the flow rate is 14000 m/min;
G. then, collecting the superfine fiber filaments on a condensing net roller, and carding to form a net to obtain a nascent non-woven fabric;
H. then, electret the nascent non-woven fabric through an electret to obtain a non-woven fabric with charges; wherein, in the electret process, the electret voltage is 3 ten thousand volts;
I. then, the obtained non-woven fabric with charges is wound and packaged by a winding machine; wherein the coiling speed is 15 m/min;
wherein, the steps A to I are continuously carried out on the same production line.
Example 3
A. Weighing the following raw materials in parts by weight: 97% of polypropylene resin and 3% of electret master batch;
B. putting the raw materials into a stirrer, and stirring and mixing to obtain a mixed master batch;
C. then, heating and melting the mixed master batch in the process of conveying materials by a screw extruder to obtain a molten material; wherein the screw diameter of the screw rod extruder is 120mm, and the length/diameter ratio is 30;
D. then, filtering the molten material through a filter to obtain a filtered material; wherein the aperture of the filter screen on the filter is 150 meshes;
E. homogenizing the filter material by a homogenizer to obtain a homogenized material;
F. then, the homogenized material is subjected to spinning through a nozzle, hot air drafting and cold air cooling and blowing to obtain superfine fibers; wherein the nozzle has 1500 spinneret orifices per meter on average, the direction of the hot air is at an angle of 50b with the spinneret orifices, the temperature of the hot air is 220 ℃, and the flow rate is 12000 m/min;
G. then, collecting the superfine fiber filaments on a condensing net roller, and carding to form a net to obtain a nascent non-woven fabric;
H. then, electret the nascent non-woven fabric through an electret to obtain a non-woven fabric with charges; in the electret process, the electret voltage is 6 ten thousand volts;
I. then, the obtained non-woven fabric with charges is wound and packaged by a winding machine; wherein the coiling speed is 15 m/min;
wherein, the steps A to I are continuously carried out on the same production line.
And (3) performance detection:
wherein, the fiber diameter adopts a fiber fineness apparatus to measure the diameter and the distribution; the surface charge density is measured by a digital charge meter, and the size of the sample is 10 x 10cm2(ii) a The airflow resistance is tested according to the GB 2626-2006 standard, and the wind speed is 5.33 cm/s; the filtration efficiency is tested according to GB 2626-2006 standard, the test particle is 0.3 μm, and the wind speed is 5.33 cm/s.
The test results are shown in table 1.
TABLE 1
As can be seen from table 1 above, the meltblown fabric produced according to the present invention has excellent filtration efficiency and air flow resistance properties.
Claims (6)
1. A melt-blown fabric production process method is characterized by comprising the following steps:
A. weighing the following raw materials in parts by weight: 95-97% of polypropylene resin and 3-5% of electret master batch;
B. putting the raw materials into a stirrer, and stirring and mixing to obtain a mixed master batch;
C. then, heating and melting the mixed master batch in the process of conveying materials by a screw extruder to obtain a molten material;
D. then, filtering the molten material through a filter to obtain a filtered material; wherein the aperture of the filter screen on the filter is 150 meshes;
E. homogenizing the filter material by a homogenizer to obtain a homogenized material;
F. then, the homogenized material is subjected to spinning through a nozzle, hot air drafting and cold air cooling and blowing to obtain superfine fibers; wherein the nozzle has 1500 spinneret orifices per meter on average, the direction of the hot air and the spinneret orifices form an angle of 50b, the temperature of the hot air is 200-250 ℃, and the flow rate is 12000-14000 m/min;
G. then, collecting the superfine fiber filaments on a condensing net roller, and carding to form a net to obtain a nascent non-woven fabric;
H. then, electret the nascent non-woven fabric through an electret to obtain a non-woven fabric with charges; wherein, in the electret process, the electret voltage is 3-6 ten thousand volts;
I. then, the obtained non-woven fabric with charges is wound and packaged by a winding machine; wherein the coiling speed is 15 m/min.
2. The meltblown fabric production process of claim 1, wherein: the steps A to I are carried out on the same production line continuously without interruption.
3. The meltblown fabric production process of claim 1 or 2, wherein: the screw diameter of the screw rod extruder is 100-120 mm, and the length/diameter ratio is 30.
4. The meltblown fabric production process of claim 3, wherein: and 3 layers of filter screens are arranged on the filter.
5. The meltblown fabric production process of claim 4, wherein: the temperature of the hot air is 250 ℃, and the flow rate is 13000 m/min.
6. The meltblown fabric production process of claim 5, wherein: the electret voltage is 4 ten thousand volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613033.5A CN112813583A (en) | 2020-12-31 | 2020-12-31 | Melt-blown fabric production process method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613033.5A CN112813583A (en) | 2020-12-31 | 2020-12-31 | Melt-blown fabric production process method |
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| Publication Number | Publication Date |
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| CN112813583A true CN112813583A (en) | 2021-05-18 |
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| CN202011613033.5A Pending CN112813583A (en) | 2020-12-31 | 2020-12-31 | Melt-blown fabric production process method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116397383A (en) * | 2023-06-09 | 2023-07-07 | 称道新材料科技(上海)有限公司 | Meltblown cloth with three-dimensional structure and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116397383A (en) * | 2023-06-09 | 2023-07-07 | 称道新材料科技(上海)有限公司 | Meltblown cloth with three-dimensional structure and application thereof |
| CN116397383B (en) * | 2023-06-09 | 2023-08-22 | 称道新材料科技(上海)有限公司 | Meltblown cloth with three-dimensional structure and application thereof |
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Application publication date: 20210518 |