CN114262988A - Preparation process of spunbonded fabric - Google Patents
Preparation process of spunbonded fabric Download PDFInfo
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- CN114262988A CN114262988A CN202111656195.1A CN202111656195A CN114262988A CN 114262988 A CN114262988 A CN 114262988A CN 202111656195 A CN202111656195 A CN 202111656195A CN 114262988 A CN114262988 A CN 114262988A
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- 239000004744 fabric Substances 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 68
- 239000000835 fiber Substances 0.000 claims abstract description 50
- 238000009987 spinning Methods 0.000 claims abstract description 30
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 17
- 238000005098 hot rolling Methods 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 13
- -1 polypropylene Polymers 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
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- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
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- 239000004745 nonwoven fabric Substances 0.000 description 4
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Abstract
The invention discloses a preparation process of spunbonded fabric, which comprises the following steps: s1, melting the raw materials at high temperature through a screw extruder; s2, quantitatively conveying the melted materials to a spinning box for spinning to form fibers; s3, cooling the fibers by cooling air, and stretching and shaping, wherein the cooling temperature is 9-13 ℃; the upper air supply volume is 1900-2200RPM, the lower air supply volume is 1030-1200RPM, and the monomer suction air volume is 800-1000 RPM; s4, laying the shaped fiber on a net curtain to form a fiber net; s5, the fiber web is hot rolled to form the spunbonded fabric. The invention is characterized in that the cooling temperature is 9-13 ℃; meanwhile, the upper air supply volume is 1900-2200RPM, the lower air supply volume is 1030-1200RPM, and the monomer suction air volume is 800-1000RPM, so that the broken wire rate can be reduced, and the transverse and longitudinal strength and the transverse and longitudinal elongation are improved.
Description
Technical Field
The invention relates to the technical field of non-woven fabric production, in particular to a preparation process of spunbonded fabric.
Background
The non-woven fabric is made of oriented random fibers and has the advantages of moisture resistance, air permeability, flexibility, light weight, recyclability and the like. The spunbonded fabric is one common non-woven fabric, and the common spunbonded fabric is made of terylene and polypropylene and has the advantages of high strength, good high-temperature resistance, aging resistance, ultraviolet resistance, high elongation, good stability, good air permeability and the like. Therefore, spunbonded fabrics are widely used in life.
The existing production process flow of the spunbonded fabric comprises the following steps: polymer (polypropylene + feed back) - -screw extruder high temperature melt extrusion-filter screen-metering pump (quantitative conveying) - -spinning (upper and lower drawing suction at spinning inlet) -cooling-air flow traction-net curtain netting-upper and lower press rolls (pre-reinforcement) - -rolling mill hot rolling (reinforcement) - -winding-slitting-packing. The parameters are as follows: raw materials of polypropylene (melt index is 35-40g/10min), and the melting temperature is as follows: 225 ℃ and 235 ℃; cooling air temperature: 13-17 ℃; the upper air supply volume: 2500-; lower air supply volume: 1200 and 1400 RPM; the suction air volume of the monomer is 1200-1500 RPM; mill temperature (embossing/smoothing): 156 ℃/154 ℃; rolling mill line pressure: 70N.
The spunbonded fabric prepared by the process has the following defects: the broken yarn rate is high, namely the total product quantity isolated due to broken yarn/(the total qualified product quantity + the total product quantity isolated due to broken yarn) × 100%.
Disclosure of Invention
The invention aims to provide a preparation process of spunbonded fabric, which solves the problem of high yarn breakage rate caused by the conventional production process of the spunbonded fabric.
The invention is realized by the following technical scheme:
a preparation process of spunbonded fabric comprises the following steps:
s1, melting the raw materials at high temperature through a screw extruder;
s2, quantitatively conveying the melted materials to a spinning box for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping, wherein the cooling temperature is 9-13 ℃; the upper air supply volume is 1900-2200RPM, the lower air supply volume is 1030-1200RPM, and the monomer suction air volume is 800-1000 RPM;
s4, laying the shaped fiber on a net curtain to form a fiber net;
s5, the fiber web is hot rolled to form the spunbonded fabric.
The screw extruder adopts the existing equipment, and aims to ensure that the raw materials for preparing the spunbonded fabric are subjected to phase change through high-temperature melting, so that the materials are changed from a solid state to a molten state. The screw extruder is provided with a feeding hopper, and a heating zone is arranged on the screw extruder and used for realizing material melting.
The applicant finds that the yarn breakage is easily caused in the process of using the existing spun-bonded fabric preparation process, so that the yarn breakage rate is high. Therefore, the inventors have conducted an in-depth analysis on the cause of the yarn breakage and found that:
the temperature and the air quantity of cooling air (both upper air supply and lower air supply belong to cooling air) are the root causes of yarn breakage, the cooling temperature of the existing spunbonded fabric preparation process is generally higher than 13 ℃, the common cooling air temperature is 13-17 ℃ and 18-25 ℃, the temperature of the cooling air is too high, yarn strands are not cooled sufficiently, yarn breakage is easily caused, and meanwhile, the air quantity of the cooling air is too large, the yarn strands are drafted excessively, and the yarn strands are also pulled apart, so that the yarn breakage is caused.
Therefore, the applicant verifies through a large number of experiments that the problem of broken filaments can be relieved by properly reducing the temperature, but excessive reduction of the temperature is rather adverse, and the cost of lowering the temperature too low is high, comprehensively considering that the cooling temperature is set to 9-13 ℃, and meanwhile, the temperature is reduced, so that the cooling speed is inevitably increased, if the temperature is only reduced, the air volume control of the cooling air is not carried out, and the filament breakage rate is also high, therefore, on the premise that the cooling temperature is 9-13 ℃, the cooling speed control is carried out by controlling the air volume of the upper air supply, the air volume of the lower air supply and the air volume of the monomer suction, the air volume of the cooling air is relatively reduced, and finally, the filament breakage rate is reduced.
In conclusion, the invention adopts the cooling temperature of 9-13 ℃; meanwhile, the upper air supply volume is 1900-2200RPM, the lower air supply volume is 1030-1200RPM, and the monomer suction air volume is 800-1000RPM, so that the broken wire rate can be reduced, and the following unexpected technical effects are achieved:
taking 30 g of spunbonded fabric as an example, the transverse strength and the longitudinal strength of the spunbonded fabric prepared by the process are 47-50.3N and 74-78.5N respectively, and the transverse elongation and the longitudinal elongation of the spunbonded fabric are 63-72.5 percent and 69-82.5 percent respectively.
Further, in step S1, the raw material is polypropylene.
The raw material for preparing the spunbonded fabric is usually polypropylene, and the flow index of the melted material is 35-40g/10 min.
Further, in step S1, the melting temperature is 225-235 ℃.
The melting temperature is set in a matching way based on the raw materials for preparing the spunbonded fabric, the raw materials for preparing the spunbonded fabric are usually polypropylene, and the melting temperature can realize that the polypropylene is subjected to phase change to form a molten material under the action of a screw extruder. In theory, the material can be melted through the screw extruder as long as the temperature is higher than the melting point of the material, but the excessively high temperature not only increases the cost, but also greatly affects the equipment (the screw extruder) (for example, the failure rate of the equipment increases, or the service life of the equipment decreases), so that the control of the melting temperature is not set to be excessively high on the premise of meeting the melting requirement of the material.
Further, in step S2, quantitative feeding is realized by using a metering pump.
The metering pump is the prior art, can realize quantitative measurement, the metering pump is preferably corrosion-resistant metering pump, and corrosion-resistant metering pump has corrosion-resistant advantage, and the material after the specially adapted melting has higher life.
Further, in step S3, the cooling temperature is 11-13 ℃.
Further, in step S3, the cooling tuyere is arranged up and down, and the spinning inlet is drawn up and down.
Namely, the inlet of the cooling tuyere is at the top in the vertical direction, the outlet of the cooling tuyere is at the bottom in the vertical direction, and the humidity of the cooling air is preferably controlled to be 60-70%.
Further, in step S5, the hot roll is pre-consolidated using upper and lower rolls, and then consolidated using hot rolling in a rolling mill.
The upper and lower compression rollers are two compression rollers which are symmetrical up and down, the temperature of the upper and lower compression rollers is controlled to be about 100 ℃, and the pressure is 5-10 bar. During the use, carry the fibre web between two upper and lower compression rollers, realize rolling the fibre web into spunbonded fabric under the certain temperature through the extrusion of two compression rollers.
According to the invention, the spun-bonded fabric is formed by fibers through hot roller extrusion, and then the fiber is subjected to hot rolling by the rolling mill for reinforcement treatment, so that the performance of the spun-bonded fabric can be improved, and particularly the strength of the spun-bonded fabric can be improved.
Further, in step S5, the temperature of the rolling mill is 157 ℃/155 ℃, the linear pressure of the rolling mill is 77N, the rolling mill used in the step is the existing equipment, and can be directly obtained by commercial purchase, and only the required parameters need to be adjusted in actual use.
Further, the melted materials are quantitatively conveyed to a spinning box for spinning after being filtered by a filter screen.
The filter screen is preferably stainless steel wire filter screen, stainless steel wire filter screen not only has corrosion-resistant having a bit, and intensity is higher, is particularly suitable for the material after melting that has certain viscosity, the aperture of filter screen is more excellent more little under the prerequisite of material after can melting, filters the material after melting through adopting the filter screen, can reduce the impurity of material, can improve the product quality of the spunbonded fabric of preparation on the one hand, and on the other hand can reduce the influence of impurity to follow-up spinning equipment, tensile equipment, does benefit to improve equipment's life.
Further, the method comprises the steps of sequentially winding, cutting and packaging the spunbonded fabric.
The winding is realized by adopting the existing winding machine, and the winding speed set by the winding machine is 150-300 m/min. The existing splitting machine is adopted for splitting, the semi-finished products are wound into finished products through a winding machine, the finished products with the related sizes are split, and finally, the packaging treatment is carried out.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention realizes the reduction of the broken wire rate by reducing the cooling temperature and reasonably controlling the upper air supply volume, the lower air supply volume and the monomer suction air volume to control the cooling time.
2. Compared with the traditional process, the transverse and longitudinal strength of the invention is twice higher than the industry standard, and the transverse and longitudinal elongation of the invention is twice higher than the industry standard.
3. The process of the invention does not improve the original production line, and only optimizes the product performance by changing parameters, thus being beneficial to popularization.
4. The process of the invention optimizes the parameters of the cooling step and reasonably optimizes other parameters, thereby not only improving the product quality of the spunbonded fabric and the overall performance of the spunbonded fabric, but also considering the protection equipment.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1, a process for preparing a spunbonded fabric comprises the following steps:
s1, melting the raw material at high temperature through a screw extruder, wherein the raw material is polypropylene, and the melting temperature is 230 ℃;
s2, filtering the melted materials by a filter screen, and quantitatively conveying the materials to a spinning box by a metering pump for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping the fibers, wherein the cooling temperature is 11 ℃; the upper air supply volume is 1900RPM, the lower air supply volume is 1030RPM, the monomer suction air volume is 800RPM, and the cooling air inlet adopts an up-and-down arrangement and spinning inlet up-and-down stretching suction mode;
s4, laying the shaped fiber on a net curtain to form a fiber net;
s5, forming the fiber net into the spunbonded fabric by hot rolling:
the hot roller is pre-reinforced by an upper press roller and a lower press roller, and then is reinforced by hot rolling of a rolling mill; the temperature of the upper and lower compression rolls is controlled at 200 ℃, the temperature of the rolling mill is 157 ℃/155 ℃ (the temperature of the embossing roll is 157 ℃, the temperature of the smooth roll is 155), and the linear pressure of the rolling mill is 77N;
and S5, sequentially winding, cutting and packaging the spunbonded fabric.
The yarn breakage ratio in this example was 0.03%, taking a 30 gram-weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 49.7N and 76.4N, respectively, and transverse and longitudinal elongations of 64.5% and 77.3%, respectively.
The broken filament rate is the total amount of products isolated due to broken filaments/(the total amount of qualified products + the total amount of products isolated due to broken filaments) × 100%; the strength and elongation were measured by an electronic textile tensile machine according to the method mentioned in the industry Standard "determination of breaking Strength and elongation at Break of nonwoven Fabric" FZ 60005-1991.
Example 2:
a preparation process of spunbonded fabric comprises the following steps:
s1, melting the raw material at high temperature through a screw extruder, wherein the raw material is polypropylene, and the melting temperature is 230 ℃;
s2, filtering the melted materials by a filter screen, and quantitatively conveying the materials to a spinning box by a metering pump for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping the fibers, wherein the cooling temperature is 12 ℃; the upper air supply volume is 2100RPM, the lower air supply volume is 1100RPM, the monomer suction air volume is 900RPM, and the cooling air inlet adopts an up-and-down arrangement and spinning inlet up-and-down stretching suction mode;
s4, laying the shaped fiber on a net curtain to form a fiber net;
s5, forming the fiber net into the spunbonded fabric by hot rolling:
the hot roller is pre-reinforced by an upper press roller and a lower press roller, and then is reinforced by hot rolling of a rolling mill; the temperature of the upper and lower compression rolls is controlled at 200 ℃, the temperature of the rolling mill is 157 ℃/155 ℃ (the temperature of the embossing roll is 157 ℃, the temperature of the smooth roll is 155), and the linear pressure of the rolling mill is 77N;
and S5, sequentially winding, cutting and packaging the spunbonded fabric.
This example is based on example 1, and differs from example 1 in that:
in step S3, the cooling temperature is 12 ℃; the upper air supply volume is 2100RPM, the lower air supply volume is 1100RPM, and the single suction air volume is 900 RPM.
The yarn breakage ratio in this example was 0.03%, taking a 30 gram-weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 48.7N and 75.3N, respectively, and transverse and longitudinal elongations of 63.2% and 74.9%, respectively.
Example 3:
a preparation process of spunbonded fabric comprises the following steps:
s1, melting the raw material at high temperature through a screw extruder, wherein the raw material is polypropylene, and the melting temperature is 230 ℃;
s2, filtering the melted materials by a filter screen, and quantitatively conveying the materials to a spinning box by a metering pump for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping the fibers, wherein the cooling temperature is 13 ℃; the upper air supply volume is 2200RPM, the lower air supply volume is 1200RPM, the monomer suction air volume is 1000RPM, and the cooling air inlet adopts an up-and-down arrangement and spinning inlet up-and-down stretching suction mode;
s4, laying the shaped fiber on a net curtain to form a fiber net;
s5, forming the fiber net into the spunbonded fabric by hot rolling:
the hot roller is pre-reinforced by an upper press roller and a lower press roller, and then is reinforced by hot rolling of a rolling mill; the temperature of the upper and lower compression rolls is controlled at 200 ℃, the temperature of the rolling mill is 157 ℃/155 ℃ (the temperature of the embossing roll is 157 ℃, the temperature of the smooth roll is 155), and the linear pressure of the rolling mill is 77N;
and S5, sequentially winding, cutting and packaging the spunbonded fabric.
This example is based on example 1, and differs from example 1 in that:
in step S3, the cooling temperature is 13 ℃; the upper air supply volume is 2200RPM, the lower air supply volume is 1200RPM, and the single body suction air volume is 1000 RPM.
The yarn breakage ratio of this example was 0.10%, taking a 30 gram-weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 48.2N and 74.7N, respectively, and transverse and longitudinal elongations of 72.1% and 69.8%, respectively.
Example 4:
a preparation process of spunbonded fabric comprises the following steps:
s1, melting the raw material at high temperature through a screw extruder, wherein the raw material is polypropylene, and the melting temperature is 230 ℃;
s2, filtering the melted materials by a filter screen, and quantitatively conveying the materials to a spinning box by a metering pump for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping the fibers, wherein the cooling temperature is 9 ℃; the upper air supply volume is 1900RPM, the lower air supply volume is 1030RPM, the monomer suction air volume is 800RPM, and the cooling air inlet adopts an up-and-down arrangement and spinning inlet up-and-down stretching suction mode; (ii) a
S4, laying the shaped fiber on a net curtain to form a fiber net;
s5, forming the fiber net into the spunbonded fabric by hot rolling:
the hot roller is pre-reinforced by an upper press roller and a lower press roller, and then is reinforced by hot rolling of a rolling mill; the temperature of the upper and lower compression rolls is controlled at 200 ℃, the temperature of the rolling mill is 157 ℃/155 ℃ (the temperature of the embossing roll is 157 ℃, the temperature of the smooth roll is 155), and the linear pressure of the rolling mill is 77N;
and S5, sequentially winding, cutting and packaging the spunbonded fabric.
This example is based on example 1, and differs from example 1 in that:
in step S3, the cooling temperature was 9 ℃.
The yarn breakage ratio of this example was 0.06%, taking a 30 gram-weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 47.7N and 75.4N, respectively, and transverse and longitudinal elongations of 66.8% and 73.4%, respectively.
Example 5:
a preparation process of spunbonded fabric comprises the following steps:
s1, melting the raw material at high temperature through a screw extruder, wherein the raw material is polypropylene, and the melting temperature is 230 ℃;
s2, filtering the melted materials by a filter screen, and quantitatively conveying the materials to a spinning box by a metering pump for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping the fibers, wherein the cooling temperature is 10 ℃; the upper air supply volume is 1900RPM, the lower air supply volume is 1030RPM, the monomer suction air volume is 800RPM, and the cooling air inlet adopts an up-and-down arrangement and spinning inlet up-and-down stretching suction mode; (ii) a
S4, laying the shaped fiber on a net curtain to form a fiber net;
s5, forming the fiber net into the spunbonded fabric by hot rolling:
the hot roller is pre-reinforced by an upper press roller and a lower press roller, and then is reinforced by hot rolling of a rolling mill; the temperature of the upper and lower compression rolls is controlled at 200 ℃, the temperature of the rolling mill is 157 ℃/155 ℃ (the temperature of the embossing roll is 157 ℃, the temperature of the smooth roll is 155), and the linear pressure of the rolling mill is 77N;
and S5, sequentially winding, cutting and packaging the spunbonded fabric.
This example is based on example 1, and differs from example 1 in that:
in step S3, the cooling temperature is 10 ℃.
The yarn breakage ratio in this example was 0.05%, taking a 30 gram-weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 50.1N and 78.1N, respectively, and transverse and longitudinal elongations of 66.8% and 82.1%, respectively.
Comparative example 1:
this example is based on example 1, the same cooling temperature as example 1, with the difference that:
the upper air supply volume is 2400RPM, the lower air supply volume is 1200RPM, and the single suction air volume is 1200 RPM.
The comparative example had a yarn breakage of 0.54%, using a 30 gram weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 44.3N and 72.1N, respectively, and transverse and longitudinal elongations of 59.8% and 68.7%, respectively.
Comparative example 2:
this example is based on example 2, and is identical to example 2 in cooling temperature, except that:
the upper air supply volume is 2500RPM, the lower air supply volume is 1300RPM, and the single suction air volume is 1400 RPM.
The yarn breakage ratio of this comparative example was 0.87%, taking a 30 gram weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 43.9N and 69.8N, respectively, and transverse and longitudinal elongations of 67.2% and 75.4%, respectively.
Comparative example 3:
this example is based on example 3, and is identical to example 3 in cooling temperature, with the difference that:
the upper air supply volume is 2600RPM, the lower air supply volume is 1400RPM, and the unit suction air volume is 1500 RPM.
The yarn breakage ratio of this comparative example was 1.24%, taking a 30 gram weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 44.7N and 68.7N, respectively, and transverse and longitudinal elongations of 57.4% and 65.8%, respectively.
Comparative example 4:
the comparative example is a conventional process, and compared with example 1, the cooling temperature is 15 ℃; the upper air supply volume is 2550RPM, the lower air supply volume is 1300RPM, and the single suction air volume is 1400 RPM.
The yarn breakage ratio of this comparative example was 2.58%, taking a 30 gram weight spunbonded fabric as an example: the spunbonded fabric had transverse and longitudinal strengths of 43.5N and 70.3N, respectively, and transverse and longitudinal elongations of 58.7% and 68.4%, respectively.
From the data of the above examples and comparative examples it can be seen that:
1) from the data of examples 1 to 5, it is clear that:
the invention is characterized in that the cooling temperature is 9-13 ℃; meanwhile, the upper air supply volume is 1900-2200RPM, the lower air supply volume is 1030-1200RPM, and the monomer suction air volume is 800-1000RPM, so that the broken wire rate can be reduced, and the following unexpected technical effects are achieved:
taking 30 g of spunbonded fabric as an example, the transverse strength and the longitudinal strength of the spunbonded fabric prepared by the process are 47-50.3N and 74-78.5N respectively, and the transverse elongation and the longitudinal elongation of the spunbonded fabric are 63-72.5 percent and 69-82.5 percent respectively.
2) From the comparison of examples 1 to 3 with comparative examples 1 to 3:
on the premise that the cooling temperature is the same, the cooling rate is controlled by reasonably controlling the air volume, the wire breakage rate can be reduced, but if the cooling temperature is only reduced, the cooling speed is accelerated, and the wire breakage rate is improved.
3) From a comparison of example 1 with comparative example 4, it can be seen that:
when the cooling temperature is too high, the wire breakage rate is obviously increased when the temperature is higher than 13 ℃.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The preparation process of the spunbonded fabric is characterized by comprising the following steps of:
s1, melting the raw materials at high temperature through a screw extruder;
s2, quantitatively conveying the melted materials to a spinning box for spinning to form fibers;
s3, cooling the fibers by cooling air, and stretching and shaping, wherein the cooling temperature is 9-13 ℃; the upper air supply volume is 1900-2200RPM, the lower air supply volume is 1030-1200RPM, and the monomer suction air volume is 800-1000 RPM;
s4, laying the shaped fiber on a net curtain to form a fiber net;
s5, the fiber web is hot rolled to form the spunbonded fabric.
2. The process of claim 1, wherein in step S1, the raw material is polypropylene.
3. The process according to claim 1, wherein the melting temperature in step S1 is 225-235 ℃.
4. The process of claim 1, wherein in step S2, the metered delivery is accomplished by a metering pump.
5. The process according to claim 1, wherein the cooling temperature in step S3 is 11-13 ℃.
6. The process of claim 1, wherein in step S3, the cooling air ports are arranged up and down, and the spinning inlet is drawn up and down.
7. The process of claim 1, wherein in step S5, the hot rolls are pre-consolidated by upper and lower rolls and then consolidated by hot rolling in a rolling mill.
8. The process of claim 7, wherein in step S5, the temperature of the rolling mill is 157 ℃/155 ℃ and the linear pressure of the rolling mill is 77N.
9. The process of claim 1, wherein the melted material is filtered by a filter screen and then quantitatively conveyed to a spinning box for spinning.
10. A process for preparing a spunbonded fabric according to any one of claims 1 to 9, which comprises the subsequent steps of winding, slitting and packaging the spunbonded fabric.
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| CN104480642A (en) * | 2014-12-05 | 2015-04-01 | 柳州市威腾汽车配件厂 | Preparation technology of non-woven fabrics |
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2021
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| US20160145781A1 (en) * | 2014-11-26 | 2016-05-26 | Acelon Chemicals and Fiber Corporation | Stapled melt spinning method for producing non-woven fabrics with hygroscopic metastatic feature |
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| CN107460641A (en) * | 2017-08-22 | 2017-12-12 | 浙江吉和非织造布有限公司 | A kind of flexible non-weaving cloth and preparation method thereof |
| CN107700076A (en) * | 2017-08-22 | 2018-02-16 | 浙江吉和非织造布有限公司 | A kind of high-elasticity non-woven fabric and preparation method thereof |
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Application publication date: 20220401 |