CN111636146A - A kind of preparation method of non-woven fabric - Google Patents

Abstract

The invention discloses a preparation method of non-woven fabric, which comprises the following preparation steps: s1 preparing raw materials; s2 filtering; s3 spinning into a net; s4 carrying out solution jet spinning; s5 reinforcement and finishing; s6, drying; therefore, the non-woven fabric has fluffy feeling and thick feeling, the strength and the filtering capacity of the non-woven fabric are increased, the pressure drop is low, the melt-blown fabric can be replaced, and the production cost is reduced.

Description

A kind of preparation method of non-woven fabric

technical field

The invention relates to the technical field of non-woven fabric production, in particular to a preparation method of a non-woven fabric.

Background technique

Non-woven fabrics are non-woven fabrics, which directly use polymer chips, short fibers or filaments to form fibers through air flow or machinery, and then are reinforced by solution jet spinning, needle punching or hot rolling, and finally formed after finishing. of non-woven fabrics. Spunbond non-woven fabric: After the polymer is extruded and stretched to form continuous filaments, the filaments are laid into a web, and the web is then self-bonded, thermally bonded, chemically bonded or mechanically reinforced to make the fibers The net becomes a non-woven fabric; the existing spunbond non-woven fabric has low strength, poor filtering ability, and high pressure drop. Therefore, it is currently unable to replace melt-blown cloth in air, liquid filter materials, isolation materials, absorption materials, etc. materials, mask materials, thermal insulation materials and wiping cloths and other fields.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a preparation method of a non-woven fabric, which can not only make the non-woven fabric have a fluffy and thick feeling, but also increase the strength and filtering ability of the non-woven fabric, and its pressure drop is relatively low. , which can replace the meltblown cloth and reduce the production cost.

For achieving the above object, technical scheme of the present invention is as follows:

A preparation method of non-woven fabric, comprising the following preparation steps:

S1 Raw material preparation: After mixing the raw material a, it is extruded and melted by a screw extruder to obtain a melt a, and the raw material b is dissolved in a solvent and then added to the dissolving kettle of the solution jet spinning machine, and a spinning solution b is formed by stirring;

S2 Filtration: The prepared melt a and the spinning solution b obtained in the S1 step are filtered through a filter to remove impurities, respectively, and then enter the spinning assembly respectively;

S3 spinning into a web: the melt a and the spinning solution b filtered in the S2 step are respectively quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, they are cooled and consolidated into filaments. The bundle is introduced into the drafting nozzle and drawn by the air stream, and the fiber web A is obtained by laying the web on the web forming machine;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by the airflow, cooled and consolidated into filaments on the fiber web A, and laid on the web forming machine to obtain the fiber web B;

S5 reinforcement and finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric;

S6 drying: the non-woven fabric after the solution jet spinning in step S5 is input into an oven for drying.

The invention provides a preparation method of non-woven fabric, which can not only make the non-woven fabric have a fluffy and thick feeling, but also increase the strength and filtering ability of the non-woven fabric, and its pressure drop is low, which can replace the melt-blown fabric. Reduced production costs.

On the basis of the above-mentioned technical scheme, the present invention can also be improved as follows:

As a preferred solution, the components of the raw material a and the raw material b are different or the components of the raw material a and the raw material b are the same.

As a preferred solution, when the components of the raw material a and the raw material b are different, the raw material a is composed of the following raw materials by weight: 81-86.5 parts of polypropylene, 12.5-16 parts of propylene-based elastomer, soft mother 0.5-1.5 parts of particles and 0.5-1.5 parts of titanium dioxide; the raw material b is composed of the following raw materials by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.

As a preferred solution, when the components of the raw material a and the raw material b are the same, the raw material a is composed of the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile; the raw material b is composed of the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.

As a preferred solution, in the step S3 and the step S4, the control solution jet air draught air pressure of the solution jet spinning head is 2bar-70bar, respectively.

As a preferred solution, in step S5, the non-woven fabric obtained by completing the solution jet spinning is subjected to hydrophilic treatment.

As a preferred solution, the hydrophilic treatment liquid used in the hydrophilic treatment step is obtained by mixing and stirring the hydrophilic agent and purified water in a weight ratio of 1 to 150.

As a preferred solution, in the drying step S6, the non-woven fabric is pre-dried in the first oven, and the non-woven fabric enters the second oven for drying after pre-drying.

在第二道烘箱中进行烘燥的温度为

As a preferred solution, the temperature for pre-drying in an oven is

The drying temperature in the second oven is

As a preferred solution, the S2 step filter filtration adopts the secondary filtration method of pre-filtration and fine filtration, the particle size of pre-filtration is less than 80um, and the particle size of fine filtration is less than 30um.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless otherwise specified, the reagents used in the following examples can be obtained commercially from regular channels.

In order to achieve the purpose of the present invention, a kind of preparation method of non-woven fabric provided by the present invention comprises the following steps:

S1 Raw material preparation: Mix the raw material a and feed it into the hopper. After mixing, the raw material a is extruded and melted by a twin-screw extruder to obtain melt a. The raw material a is composed of the following raw materials by weight: 81 parts of polypropylene, propylene-based 12.5 parts of elastomers, 0.5 parts of soft masterbatch, and 0.5 parts of titanium dioxide; the raw material b is dissolved in the solvent and then added to the dissolving kettle of the solution jet spinning machine, and the spinning solution b is formed by stirring; the raw material b is composed of the following parts by weight of raw materials : 10 parts of polylactic acid and 20 parts of polyacrylonitrile;

S2 Melt Filtration: The melt a and spinning solution b obtained in step S1 are filtered through filters to remove impurities online respectively, and then enter the spinning assembly. The filters are filtered online to remove impurities using a secondary filtration method of pre-filtration and fine filtration. , the precision of pre-filtering is less than 80um, and the precision of fine-filtering is less than 30um;

S3 spinning into a web: the melt a filtered in step S2 is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, it is cooled and consolidated into filaments, and the tow is introduced into the drafting nozzle through the Airflow traction, solution jet traction wind pressure is 50bar, and fiber webs A are obtained by laying webs on the web forming machine;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by air flow, and the solution is sprayed with a pulling air pressure of 50 bar, cooled and consolidated into filaments on the fiber web A, and laid on the web forming machine to obtain the fiber web B;

S5 reinforcement finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric, and the surface layer of the non-woven fabric is subjected to hydrophilic treatment, and the treatment liquid for the hydrophilic treatment is a hydrophilic agent and a Pure water is mixed and stirred into a liquid state according to the weight ratio of 1:150, and heated to 53°C.

S6 drying: the non-woven fabric after the hydrophilic treatment in step S5 is transported to the oven for at least two times by rolling with liquid. First, the non-woven fabric is pre-dried in the first oven, and the The pre-drying temperature in the first oven is 105°C; after the pre-drying, the non-woven fabric enters the second oven for drying, and the drying temperature of the second oven is 110°C. Factory packing.

In this embodiment, the non-woven fabric 1 is produced by first spunbonding and then solution jet spinning, which can make the non-woven fabric 1 have a fluffy and thick feeling, increase the strength and filtering ability of the non-woven fabric 1, and can replace the melt-blown The cloth reduces the production cost. In this embodiment, the surface layer of the non-woven fabric 1 is subjected to hydrophilic treatment, which can effectively improve the hydrophilicity of the non-woven fabric 1 .

The preparation method of a kind of non-woven fabric provided by the invention comprises the following steps:

S1 Raw material preparation: Mix the raw material a and feed it into the hopper. After mixing, the raw material a is extruded and melted by a twin-screw extruder to obtain melt a. The raw material a is composed of the following raw materials by weight: 86.5 parts of polypropylene, propylene-based 16 parts of elastomer, 1.5 parts of soft masterbatch and 1.5 parts of titanium dioxide; raw material b is dissolved in a solvent and added to the dissolving kettle of the solution jet spinning machine, and a spinning solution b is formed by stirring; raw material b is composed of the following parts by weight of raw materials : 70 parts of polylactic acid and 80 parts of polyacrylonitrile;

S2 melt filtration: the melt a and spinning solution b obtained in step S1 are respectively removed from impurities online through the filter, and then enter the spinning assembly. The precision of filtration is less than 80um, and the precision of fine filtration is less than 30um;

S3 spinning into a web: the melt a filtered in step S2 is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, it is cooled and consolidated into filaments, and the tow is introduced into the drafting nozzle through the Airflow traction, solution jet traction wind pressure is 70bar, and fiber webs A are obtained by laying webs on the web forming machine;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by air flow, and the solution is sprayed with a pulling air pressure of 70 bar, cooled and consolidated into filaments on the fiber web A, and laid on the web forming machine to obtain the fiber web B;

S5 reinforcement finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric, and the surface layer of the non-woven fabric is subjected to hydrophilic treatment, and the treatment liquid for the hydrophilic treatment is a hydrophilic agent and a Pure water is mixed and stirred into a liquid state according to the weight ratio of 1:150, and heated to 53°C;

S6 drying: the non-woven fabric after the hydrophilic treatment in step S5 is transported to the oven for at least two times by rolling with liquid. First, the non-woven fabric is pre-dried in the first oven, and the The pre-drying temperature in the first oven is 125°C; after pre-drying, the non-woven fabric enters the second oven for drying, and the drying temperature of the second oven is 130°C. Factory packing.

In this embodiment, the non-woven fabric 2 is produced by first spunbonding and then solution jet spinning, which can make the non-woven fabric 2 have a fluffy and thick feeling, increase the strength and filtering ability of the non-woven fabric 2, and can replace the melt-blown In this embodiment, the surface layer of the non-woven fabric 2 is subjected to hydrophilic treatment, which can effectively improve the hydrophilicity of the non-woven fabric 2 .

The preparation method of a kind of non-woven fabric provided by the invention comprises the following steps:

S1 Raw material preparation: Mix the raw material a and feed it into the hopper. After mixing, the raw material a is extruded and melted by a twin-screw extruder to obtain melt a. The raw material a is composed of the following raw materials by weight: 83.75 parts of polypropylene, propylene-based 14.25 parts of elastomer, 1.0 part of soft masterbatch and 1.0 part of titanium dioxide; raw material b is dissolved in a solvent and added to the dissolving kettle of the solution jet spinning machine, and a spinning solution b is formed by stirring; raw material b is composed of the following parts by weight of raw materials : 40 parts of polylactic acid and 50 parts of polyacrylonitrile;

S2 Melt filtration: the melt a and spinning solution b obtained in step S1 are respectively filtered online to remove impurities through the filter, and then enter the spinning assembly. , the precision of pre-filtering is less than 80um, and the precision of fine-filtering is less than 30um;

S3 spinning into a web: the melt a filtered in step S2 is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, it is cooled and consolidated into filaments, and the tow is introduced into the drafting nozzle through the Airflow traction, solution jet traction wind pressure is 2bar, and fiber webs A are obtained by laying webs on the web forming machine;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by air flow, and the solution is sprayed with a pulling air pressure of 2 bar, which is cooled and consolidated into filaments on the fiber web A, and the fiber web B is obtained by laying the web on the web forming machine;

S5 reinforcement finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric, and the surface layer of the non-woven fabric is subjected to hydrophilic treatment, and the treatment liquid for the hydrophilic treatment is a hydrophilic agent and a Pure water is mixed and stirred into a liquid state according to the weight ratio of 1:150, and heated to 53°C;

S6 drying: the non-woven fabric after the hydrophilic treatment in step S5 is transported to the oven for at least two times by rolling with liquid. First, the non-woven fabric is pre-dried in the first oven, and the The pre-drying temperature in the first oven is 112°C; after pre-drying, the non-woven fabric enters the second oven for drying, and the second oven drying temperature is 142°C, and is trimmed and rolled by the winder. Factory packing.

In this embodiment, the non-woven fabric 3 is produced by first spunbonding and then solution jet spinning, which can make the non-woven fabric 3 have a fluffy and thick feeling, increase the strength and filtering ability of the non-woven fabric, and can replace the melt-blown fabric. To reduce the production cost, the hydrophilic treatment of the surface layer of the non-woven fabric can effectively improve the hydrophilicity of the non-woven fabric.

The preparation method of a kind of non-woven fabric provided by the invention comprises the following steps:

S1 Raw material preparation: Mix the raw material a and feed it into the hopper. After mixing, the raw material a is extruded and melted by a twin-screw extruder to obtain a melt a. The raw material a is composed of the following raw materials by weight: 10 parts of polylactic acid and polypropylene 20 parts of nitrile; after the raw material b is dissolved in the solvent, it is added to the dissolving kettle of the solution jet spinning machine, and the spinning solution b is formed by stirring; the raw material b is composed of the following raw materials by weight: 10 parts of polylactic acid and 20 parts of polyacrylonitrile ;

S2 Melt filtration: the melt a and spinning solution b obtained in step S1 are respectively filtered online to remove impurities through the filter, and then enter the spinning assembly. , the precision of pre-filtering is less than 80um, and the precision of fine-filtering is less than 30um;

S3 spinning into a web: the melt a filtered in step S2 is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, it is cooled and consolidated into filaments, and the tow is introduced into the drafting nozzle through the Air-drafting, laying the web on the web forming machine to obtain the fiber web A;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by air flow, and the solution is sprayed with a pulling air pressure of 50 bar, cooled and consolidated into filaments on the fiber web A, and laid on the web forming machine to obtain the fiber web B;

S5 reinforcement finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric, and the surface layer of the non-woven fabric is subjected to hydrophilic treatment, and the treatment liquid for the hydrophilic treatment is a hydrophilic agent and a Pure water is mixed and stirred into a liquid state according to the weight ratio of 1:150, and heated to 53°C;

S6 drying: the non-woven fabric after the hydrophilic treatment in step S5 is transported to the oven for at least two times by rolling with liquid. First, the non-woven fabric is pre-dried in the first oven, and the The pre-drying temperature in the first oven is 105°C; after the pre-drying, the non-woven fabric enters the second oven for drying, and the drying temperature of the second oven is 110°C. Factory packing.

In this embodiment, the non-woven fabric 4 is produced by first spunbonding and then solution jet spinning, which can make the non-woven fabric 4 have a fluffy and thick feeling, increase the strength and filtering ability of the non-woven fabric 4, and can replace the melt-blown In this embodiment, the surface layer of the non-woven fabric 4 is subjected to hydrophilic treatment, which can effectively improve the hydrophilicity of the non-woven fabric.

The preparation method of a kind of non-woven fabric provided by the invention comprises the following steps:

S1 Raw material preparation: Mix the raw material a and feed it into the hopper. After mixing, the raw material a is extruded and melted by a twin-screw extruder to obtain melt a. The raw material a is composed of the following raw materials by weight: 70 parts of polylactic acid and polypropylene 80 parts of nitrile; the raw material b is dissolved in the solvent and added to the dissolving kettle of the solution jet spinning machine, and the spinning solution b is formed by stirring; the raw material b is composed of the following raw materials by weight: 70 parts of polylactic acid and 80 parts of polyacrylonitrile ;

S2 Melt filtration: the melt a and spinning solution b obtained in step S1 are respectively filtered online to remove impurities through the filter, and then enter the spinning assembly. , the precision of pre-filtering is less than 80um, and the precision of fine-filtering is less than 30um;

S3 spinning into a web: the melt a filtered in step S2 is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, it is cooled and consolidated into filaments, and the tow is introduced into the drafting nozzle through the Air-drafting, laying the web on the web forming machine to obtain the fiber web A;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by air flow, and the solution is sprayed with a pulling air pressure of 50 bar, cooled and consolidated into filaments on the fiber web A, and laid on the web forming machine to obtain the fiber web B;

S5 reinforcement finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric, and the surface layer of the non-woven fabric is subjected to hydrophilic treatment, and the treatment liquid for the hydrophilic treatment is a hydrophilic agent and a Pure water is mixed and stirred into a liquid state according to the weight ratio of 1:150, and heated to 53°C.

S6 drying: the non-woven fabric after the hydrophilic treatment in step S5 is transported to the oven for at least two times by rolling with liquid. First, the non-woven fabric is pre-dried in the first oven, and the The pre-drying temperature in the first oven is 105°C; after the pre-drying, the non-woven fabric enters the second oven for drying, and the drying temperature of the second oven is 110°C. Factory packing.

In this embodiment, the non-woven fabric 5 is produced by first spunbonding and then solution jet spinning, which can make the non-woven fabric 5 have a fluffy and thick feeling, increase the strength and filtering ability of the non-woven fabric, and can replace the melt-blown fabric. To reduce the production cost, in this embodiment, the surface layer of the non-woven fabric 5 is subjected to hydrophilic treatment, which can effectively improve the hydrophilicity of the non-woven fabric.

The preparation method of a kind of non-woven fabric provided by the invention comprises the following steps:

S1 Raw material preparation: Mix the raw material a and feed it into the hopper. After mixing, the raw material a is extruded and melted by a twin-screw extruder to obtain the melt a. The raw material a is composed of the following raw materials by weight: 40 parts of polylactic acid and polypropylene 50 parts of nitrile; after the raw material b is dissolved in the solvent, it is added to the dissolving kettle of the solution jet spinning machine, and the spinning solution b is formed by stirring; the raw material b is composed of the following raw materials by weight: 40 parts of polylactic acid and 50 parts of polyacrylonitrile;

S2 Melt filtration: the melt a and spinning solution b obtained in step S1 are respectively filtered online to remove impurities through the filter, and then enter the spinning assembly. , the precision of pre-filtering is less than 80um, and the precision of fine-filtering is less than 30um;

S3 spinning into a web: the melt a filtered in step S2 is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, it is cooled and consolidated into filaments, and the tow is introduced into the drafting nozzle through the Air-drafting, laying the web on the web forming machine to obtain the fiber web A;

S4 solution jet spinning: the fiber web A in step S3 is sent into the solution jet receiving net, the spinning solution b is quantitatively fed into the spinning assembly by a metering pump, and after being ejected from the spinneret of the spinning machine, the tow is introduced into the drafting The nozzle is drawn by air flow, and the solution is sprayed with a pulling air pressure of 50 bar, cooled and consolidated into filaments on the fiber web A, and laid on the web forming machine to obtain the fiber web B;

S5 reinforcement finishing: the fiber web B obtained in the step S4 is overlapped into the solution jet spinning area for reinforcement to obtain a non-woven fabric, and the surface layer of the non-woven fabric is subjected to hydrophilic treatment, and the treatment liquid for the hydrophilic treatment is a hydrophilic agent and a Pure water is mixed and stirred into a liquid state according to the weight ratio of 1:150, and heated to 53°C.

S6 drying: the non-woven fabric after the hydrophilic treatment in step S5 is transported to the oven for at least two times by rolling with liquid. First, the non-woven fabric is pre-dried in the first oven, and the The pre-drying temperature in the first oven is 105°C; after the pre-drying, the non-woven fabric enters the second oven for drying, and the drying temperature of the second oven is 110°C. Factory packing.

In this embodiment, the non-woven fabric 6 is produced by first spunbonding and then solution jet spinning, which can make the non-woven fabric 6 have a fluffy and thick feeling, increase the strength and filtering ability of the non-woven fabric, and can replace the melt-blown fabric. To reduce the production cost, in this embodiment, the surface layer of the non-woven fabric 6 is subjected to hydrophilic treatment, which can effectively improve the hydrophilicity of the non-woven fabric.

Effect test:

The performance of the non-woven fabric made in the above-described embodiment and the air filter were tested (respectively in Table 1 and Table 2), and the test result was compared with the existing product, the results are as follows:

Table 1: Comparison of Air Permeability, Pore Size, Burst Resistance, Stiffness, and Antibacterial Properties

Table 2 The filtration efficiency of the non-woven fabric provided by the invention to make the filter (take the gram weight 180-220 g/square meter as an example)

2. Test standard

The criteria used for each of the above tests are as follows:

The thickness measurement adopts GB/T3820-1997 standard; the air permeability measurement adopts GB/T5453-1997 standard; the pore diameter measurement adopts GB/T2679.14-1996 standard; the burst resistance measurement adopts GB/T454-1989 standard; the stiffness measurement adopts GB/T454-1989 standard /T2679.3-1996 standard; the antibacterial activity was determined by the 2.1.8.7 shaking flask test of the "Technical Specification for Disinfection" (2002 Edition) of the Ministry of Health;

The classification efficiency of the non-woven filter was tested on a test bench conforming to GB/14295-2008 "Air Filter", using CLJ-03A laser dust particle counter, TSI-8108 large particle size aerosol generator, sampling flow rate is 2.83L/min.

3. Analysis of test results

The results in Table 1 show: in terms of air permeability, pore size, burst resistance, stiffness, antibacterial properties, etc., the effect of the non-woven fabrics 1-6 prepared by the preparation method of a non-woven fabric provided by the present invention is obviously better than PET needle punched non-woven filter media and filter paper on the market. It is shown that the effect of the non-woven filter material provided by the present invention is obviously better than that of the existing products.

The results in Table 2 show that the filters prepared from non-woven fabrics meet the classification standards for high-efficiency and sub-high-efficiency filters in GB12218-89.

4 Conclusion

The present invention provides a method for preparing a non-woven fabric, which can not only make the non-woven fabric 1-6 have a fluffy and thick feeling, but also increase the strength and filtration capacity of the non-woven fabric 1-6, and its pressure drop is low, It can replace the melt-blown cloth and reduce the production cost. The present invention performs hydrophilic treatment on the surface layer of the non-woven fabric 1-6, which can effectively improve the hydrophilicity of the non-woven fabric 1-6.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the inventive concept of the present invention, which belong to the present invention. The scope of protection of the invention.

Claims (10)

1. The preparation method of the non-woven fabric is characterized by comprising the following preparation steps:

preparing S1 raw material: mixing the raw materials a, extruding and melting the mixture by a screw extruder to obtain a melt a, dissolving the raw materials b in a solvent, adding the dissolved raw materials b into a dissolving kettle of a solution jet spinning machine, and stirring to form a spinning solution b;

s2 filtering: filtering the prepared melt a and the spinning solution b obtained in the step S1 through filters respectively to remove impurities, and then feeding the melt a and the spinning solution b into a spinning assembly respectively;

s3 spinning into net: quantitatively feeding the melt a and the spinning solution b filtered in the step S2 into a spinning assembly by using metering pumps respectively, spraying the melt a and the spinning solution b by using a spinneret plate of a spinning machine, cooling and solidifying the melt a and the spinning solution b into filaments, guiding the filaments into a drawing nozzle, drawing the filaments by using air flow, and lapping on a lapping machine to obtain a fiber web A;

s4 solution jet spinning: feeding the fiber web A obtained in the step S3 into a solution jet receiving net, quantitatively feeding the spinning solution B into a spinning assembly by using a metering pump, after the spinning solution B is jetted out by a spinneret plate of a spinning machine, guiding tows into a drawing nozzle, drawing the tows by using air flow, cooling and solidifying the tows on the fiber web A into filaments, and laying a net on a net forming machine to obtain a fiber web B;

s5 reinforcement and finishing: overlapping the fiber web B obtained in the step S4 into a solution jet spinning area for reinforcement to obtain a non-woven fabric;

s6 drying: and (4) inputting the non-woven fabric subjected to the solution jet spinning in the step S5 into an oven for drying.

2. The method of claim 1, wherein the raw material a and the raw material b have different compositions or the raw material a and the raw material b have the same composition.

3. The method for preparing the non-woven fabric according to any one of claims 1 to 2, wherein when the components of the raw material a and the raw material b are different, the raw material a consists of the following raw materials in parts by weight: 81-86.5 parts of polypropylene, 12.5-16 parts of propenyl elastomer, 0.5-1.5 parts of soft master batch and 0.5-1.5 parts of titanium dioxide; the raw material b comprises the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.

4. The method for preparing the non-woven fabric according to any one of claims 1 to 2, wherein when the components of the raw material a and the raw material b are the same, the raw material a consists of the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile; the raw material b comprises the following raw materials in parts by weight: 10-70 parts of polylactic acid and 20-80 parts of polyacrylonitrile.

5. The method of preparing a nonwoven fabric according to claim 1, wherein the drawing wind pressure of the solution jet control air stream of the solution jet spinning head in the steps of S3 and S4 is 2bar to 70bar, respectively.

6. The method of manufacturing a nonwoven fabric according to claim 1, wherein the nonwoven fabric obtained by the solution jet spinning in the step S5 is subjected to a hydrophilic treatment.

7. The method for producing a nonwoven fabric according to claim 6, wherein the hydrophilic treatment liquid used in the hydrophilic treatment step is obtained by mixing and stirring a hydrophilic agent and purified water at a weight ratio of 1 to 150.

8. The method of claim 1, wherein the step of drying in step S6 comprises pre-drying the nonwoven fabric in a first oven, and the pre-dried nonwoven fabric is dried in a second oven.

9. The method of claim 8, wherein the pre-drying is carried out in a single oven at a temperature of

The temperature for drying in the second drying oven is

10. The method of claim 1, wherein the step S2 is performed by two-stage filtration including pre-filtration and fine filtration, the pre-filtration has a particle size of less than 80um, and the fine filtration has a particle size of less than 30 um.