阅读说明：本技术 一种纳米纤维静电纺丝医用防护服面料的制备方法 (Preparation method of nanofiber electrostatic spinning medical protective clothing fabric ) 是由 胡才坤 刘江川 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种纳米纤维静电纺丝医用防护服面料的制备方法,涉及医用面料领域。该纳米纤维静电纺丝医用防护服面料的制备方法,包括溶液配制、二次纺丝、紫外固化和二浸一轧四个步骤。该纳米纤维静电纺丝医用防护服面料的制备方法,静电纺丝机喷丝针头运动路径相对于静电纺丝机本体分别呈横向和竖向“Z”字形进行两次纺丝,纺制的面料各方向的抗拉抗撕裂能力优异,满足医护人员日常使用要求,延长使用寿命,降低整体使用成本,玻璃的光滑性也便于操作人员将喷射纺丝后成型的面料取下,缩短处理时间,加之紫外线灯的设置,能够达到提升纺丝固化速度和杀灭面料上细菌的双重效果。(The invention discloses a preparation method of a nanofiber electrostatic spinning medical protective clothing fabric, and relates to the field of medical fabrics. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric comprises four steps of solution preparation, secondary spinning, ultraviolet curing and two-dipping and one-rolling. This preparation method of medical protective clothing surface fabric of nanofiber electrostatic spinning, electrostatic spinning machine spouts the needle motion path and is horizontal and vertical "Z" font respectively for electrostatic spinning machine body and carries out twice spinning, the tear resistance of tensile of the surface fabric all directions that spins is excellent, satisfy medical personnel's daily operation requirement, and increase of service life reduces whole use cost, the fashioned surface fabric of operating personnel after will spouting spinning is also convenient for to the smoothness of glass takes off, shorten the processing time, ultraviolet lamp's setting in addition, can reach the dual effect that promotes spinning solidification speed and exterminate the bacterium on the surface fabric.)

1. A preparation method of nanofiber electrostatic spinning medical protective clothing fabric is characterized by comprising the following steps:

s1: solution preparation

1) Feeding corresponding electrostatic spinning solution raw materials into a ball mill for grinding, feeding the powdered raw materials and corresponding parts by weight of water into a hot melting machine for hot melting after grinding, controlling the hot melting temperature to be 175-;

2) filtering the hot-melted electrostatic spinning solution by using a filter screen, cooling the electrostatic spinning solution after filtering, sending the electrostatic spinning solution into a homogenizer after cooling to normal temperature, homogenizing the electrostatic spinning solution, removing the upper layer froth of the electrostatic spinning solution after homogenizing for 10-20min, and taking the electrostatic spinning solution of which the upper layer does not contain bottom impurities;

s2: secondary spinning

1) Filling an electrostatic spinning solution into an electrostatic spinning machine, prefabricating a box body with an opening at the top, arranging an ultraviolet lamp at the inner side of the box body, inlaying and installing glass at the opening at the top of the box body, conveying the prefabricated box body to be right below a spinning nozzle of the electrostatic spinning machine, and keeping a spinning nozzle needle of the electrostatic spinning machine vertical to the prefabricated box body;

2) starting an electrostatic spinning machine, starting spinning on the glass surface at the top of a prefabricated box body, controlling the motion path of a spinning needle of the electrostatic spinning machine to be in a transverse Z shape relative to the electrostatic spinning machine body, controlling the motion path of the spinning needle of the electrostatic spinning machine to be adjusted to be in a vertical Z shape relative to the electrostatic spinning machine body after the thickness of the spun fabric reaches 0.7-1.1mm, continuing spinning, and stopping after the thickness of the spun fabric reaches 1.3-1.7mm to obtain the electrostatic spinning fabric;

s3: ultraviolet curing

In the electrostatic spinning process, simultaneously turning on an ultraviolet lamp inside the prefabricated box body, solidifying and sterilizing the spinning sprayed on the glass by the ultraviolet lamp, wherein the irradiation time of the ultraviolet lamp is synchronous with the electrostatic spinning operation time;

s4: two-dipping and one-rolling

1) Pouring the prefabricated padding liquid into a padding pool, preheating the padding liquid to 48-58 ℃, taking down the electrostatic spinning fabric on the glass, soaking the fabric in the preheated padding pool for 15-25min, controlling the temperature in the padding pool to rise to 55-65 ℃, and continuing to soak for 10-18 min;

2) winding and sleeving the electrostatic spinning fabric on a roller immersed in the pre-prepared mangling liquid, extruding and pushing the electrostatic spinning fabric below the liquid level by using the roller, wherein the stretching ratio of the length of the extruded electrostatic spinning fabric to the length of the electrostatic spinning fabric before extrusion is 1.15-1.25: 1;

3) and taking the electrostatic spinning fabric out of the padding pool, sending the electrostatic spinning fabric into a dust-free environment, air-drying the electrostatic spinning fabric by using a fan, and obtaining the nanofiber electrostatic spinning medical protective clothing fabric after the electrostatic spinning fabric is completely dried.

2. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 1, wherein the preparation method comprises the following steps: the rotation speed of the ball mill in the solution preparation step is 1370-1590rpm, and the ground powdery raw material can pass through a screen with 180-240 meshes.

3. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 2, wherein the preparation method comprises the following steps: the number of the filter screens used for filtering the electrostatic spinning solution after hot melting in the solution preparation step is 210-270 meshes.

4. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 3, wherein the preparation method comprises the following steps: and in the secondary spinning step, the distance between the glass at the top of the prefabricated box body and a spinning needle of the electrostatic spinning machine is 32-40 cm.

5. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 4, wherein the preparation method comprises the following steps: and before the electrostatic spinning step, a shading cover is used for shielding the electrostatic spinning machine and the prefabricated box body.

6. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 5, wherein the preparation method comprises the following steps: in the solution preparation step, the raw materials of the electrostatic spinning solution comprise the following components in parts by weight: 30-50 parts of hot melt adhesive for fabrics, 18-24 parts of polylactic acid, 12-16 parts of methanol, 8-10 parts of animal fat and 5-7 parts of polystyrene.

7. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 6, wherein the preparation method comprises the following steps: in the solution preparation step, the water which is sent into the hot melting machine together with the powdery raw materials is 0.3 to 0.5 time of the sum of the parts by weight of the powdery raw materials.

8. The preparation method of the nanofiber electrostatic spinning medical protective clothing fabric as claimed in claim 7, wherein the preparation method comprises the following steps: the padding liquid prefabricated in the step of two-dipping and one-rolling comprises the following raw materials in parts by weight: 6.5 to 8.5 percent of quaternary ammonium salt, 3.4 to 5.4 percent of caustic soda, 2.6 to 3.6 percent of penetrating agent, 2.4 to 3.4 percent of migration inhibitor and the balance of water.

Technical Field

The invention relates to the technical field of medical fabrics, in particular to a preparation method of a nanofiber electrostatic spinning medical protective clothing fabric.

Background

The medical protective clothing is used by medical staff and people entering specific medical and health areas, and has the functions of isolating germs, harmful ultrafine dust, acid-base solution, electromagnetic radiation and the like, ensuring the safety of the staff and keeping the environment clean.

However, most of the existing medical protective clothing has poor fabric strength and tear resistance, is easy to damage and has limited service life, and part of the fabric prepared by the electrostatic spinning technology has high efficiency, but has large thickness limitation and thin material as a whole, for example, the invention patent with the publication number of CN111962211A needs to be compounded with base cloth, which affects the production efficiency and the whole quality of the fabric, affects the original properties of the electrostatic spinning nano fabric, and is not beneficial to popularization and use.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the preparation method of the nanofiber electrostatic spinning medical protective clothing fabric, which is high in efficiency, and the prepared fabric is strong in tear resistance.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of nanofiber electrostatic spinning medical protective clothing fabric can solve the problems of low process efficiency and poor finished product quality: a preparation method of nanofiber electrostatic spinning medical protective clothing fabric comprises the following steps:

s1: solution preparation

Feeding corresponding electrostatic spinning solution raw materials into a ball mill for grinding, feeding the powdered raw materials and corresponding parts by weight of water into a hot melting machine for hot melting after grinding, controlling the hot melting temperature to be 175-185 ℃, and heating until the electrostatic spinning solution raw materials are completely hot melted into liquid; filtering the hot-melted electrostatic spinning solution by using a filter screen, cooling the electrostatic spinning solution after filtering, sending the electrostatic spinning solution into a homogenizer after cooling to normal temperature, homogenizing the electrostatic spinning solution for 10-20min, removing the upper layer froth of the electrostatic spinning solution, and taking the electrostatic spinning solution of which the upper layer does not contain bottom impurities;

s2: secondary spinning

Filling an electrostatic spinning solution into an electrostatic spinning machine, prefabricating a box body with an opening at the top, arranging an ultraviolet lamp on the inner side of the box body, inlaying and installing glass at the opening at the top of the box body, conveying the prefabricated box body to the position right below a spinning nozzle of the electrostatic spinning machine, and keeping a spinning nozzle needle of the electrostatic spinning machine vertical to the prefabricated box body; starting an electrostatic spinning machine, starting spinning on the glass surface at the top of the prefabricated box body, controlling the motion path of a spinning needle of the electrostatic spinning machine to be in a transverse Z shape relative to the electrostatic spinning machine body, controlling the motion path of the spinning needle of the electrostatic spinning machine to be in a vertical Z shape relative to the electrostatic spinning machine body after the thickness of the spun fabric reaches 0.7-1.1mm, continuing spinning, and stopping after the thickness of the spun fabric reaches 1.3-1.7mm to obtain the electrostatic spinning fabric, wherein the spun fabric has excellent tensile strength and tear resistance in each direction, meets the daily use requirements of medical workers, prolongs the service life and reduces the overall use cost;

s3: ultraviolet curing

In the electrostatic spinning process, simultaneously turning on an ultraviolet lamp inside the prefabricated box body, solidifying and sterilizing the spinning sprayed on the glass by the ultraviolet lamp, wherein the irradiation time of the ultraviolet lamp is synchronous with the electrostatic spinning operation time;

s4: two-dipping and one-rolling

Pouring the prefabricated padding liquid into a padding pool, preheating the padding liquid to 48-58 ℃, taking off the electrostatic spinning fabric on the glass, soaking the electrostatic spinning fabric in the preheated padding pool for 15-25min, controlling the temperature in the padding pool to rise to 55-65 ℃, and continuing to soak for 10-18 min; winding and sleeving the electrostatic spinning fabric on a roller immersed in the prefabricated mangling liquid, extruding and pushing the electrostatic spinning fabric below the liquid level by using the roller, wherein the length of the extruded electrostatic spinning fabric is 1.15-1.25 of the stretch ratio of the length before extrusion: 1;

taking the electrostatic spinning fabric out of the padding pool, sending the electrostatic spinning fabric into a dust-free environment, air-drying the electrostatic spinning fabric by using a fan, and obtaining the nanofiber electrostatic spinning medical protective clothing fabric after the electrostatic spinning fabric is completely dried.

Preferably, the rotation speed of the ball mill in the solution preparation step is 1370-1590rpm, and the ground powdery raw material can pass through a screen with 180-240 meshes.

Preferably, the number of the filter meshes used for filtering the hot-melted electrostatic spinning solution in the solution preparation step is 210-270 meshes.

Preferably, the distance between the glass at the top of the prefabricated box body and the spinning needle of the electrostatic spinning machine in the secondary spinning step is 32-40cm, the straight glass is used as a device for receiving electrostatic spinning, compared with a drum-type receiving device, the thickness of the spinning fabric can be better improved, the limitation of the electrostatic spinning process on the thickness is solved, the integral strength of the forming fabric is improved, meanwhile, the smoothness of the glass is convenient for an operator to take down the fabric formed after the jet spinning, and the processing time is shortened.

Preferably, the electrospinning machine and the preform box are shielded by a light shield before the electrospinning step.

Preferably, the raw materials of the electrostatic spinning solution in the solution preparation step comprise the following components in parts by weight: 30-50 parts of hot melt adhesive for fabrics, 18-24 parts of polylactic acid, 12-16 parts of methanol, 8-10 parts of animal fat and 5-7 parts of polystyrene.

Preferably, the water which is fed into the hot melting machine together with the powdery raw materials in the solution preparation step is 0.3-0.5 times of the sum of the parts by weight of the powdery raw materials.

Preferably, the padding liquid prefabricated in the step of two-dipping and one-rolling comprises the following raw materials in parts by weight: 6.5-8.5% of quaternary ammonium salt, 3.4-5.4% of caustic soda, 2.6-3.6% of penetrating agent, 2.4-3.4% of migration inhibitor and the balance of water, wherein the quaternary ammonium salt can further improve the antibacterial capability of the fabric, and meanwhile, the fabric is not required to be compounded with other fabrics; the air permeability is ensured on the premise of not influencing the strength performance, and the overall performance is improved.

(III) advantageous effects

Compared with the prior art, the invention provides a preparation method of nanofiber electrostatic spinning medical protective clothing fabric, which has the following beneficial effects:

1. the motion path of the spinning needle of the electrostatic spinning machine is respectively in a transverse Z shape and a vertical Z shape relative to the electrostatic spinning machine body for twice spinning, the tensile and tear resistance of the spun fabric in all directions is excellent, the daily use requirement of medical personnel is met, the service life is prolonged, the overall use cost is reduced, and the popularization and the use are facilitated.

2. Prefabricated open-top's box, set up ultraviolet lamp in the box inboard, inlay installation glass in box open-top again, electrostatic spinning machine spinneret syringe needle keeps perpendicular with prefabricated box, adopt straight glass as the device of receiving electrostatic spinning, for drum-type receiving arrangement, can promote the thickness of spinning surface fabric better, solve the limitation of electrostatic spinning technology to thickness, promote the holistic intensity of shaping surface fabric, the fashioned surface fabric of operating personnel after the while smoothness of glass also is convenient for will jet spinning takes off, shorten the processing time, ultraviolet lamp's setting in addition, can reach the dual effect of promoting spinning solidification speed and killing the bacterium on the surface fabric, promotion technological method overall efficiency and the off-the-shelf quality of surface fabric.

3. The fabric after electrostatic spinning forming is modified by adopting a 'two-dipping one-rolling' mode, compared with a processing means of a common method, the fabric is milder and more effective, the quaternary ammonium salt can further improve the antibacterial capability of the fabric, meanwhile, the fabric does not need to be compounded with other fabrics, the air permeability is ensured on the premise of not influencing the strength performance, the overall performance of the fabric is improved, and the use requirement of medical personnel is met.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

a preparation method of nanofiber electrostatic spinning medical protective clothing fabric can solve the problems of low process efficiency and poor finished product quality: a preparation method of nanofiber electrostatic spinning medical protective clothing fabric comprises the following steps:

the method comprises the following steps: solution preparation

Feeding corresponding electrostatic spinning solution raw materials into a ball mill for grinding, wherein the rotating speed of the ball mill is 1370rpm, the ground powdery raw materials can pass through a 180-mesh screen, and after grinding, the powdery raw materials and corresponding parts by weight of water are fed into a hot melting machine for hot melting, wherein the electrostatic spinning solution raw materials comprise the following components in parts by weight: 30 parts of hot melt adhesive for fabrics, 18 parts of polylactic acid, 12 parts of methanol, 8 parts of animal fat and 5 parts of polystyrene, controlling the hot melting temperature to be 175 ℃, heating the water to ensure that the raw materials of the electrostatic spinning solution are completely melted into liquid, wherein the weight part of the water is 0.3 times of the sum of the weight parts of the powdery raw materials; filtering the hot-melted electrostatic spinning solution by using a filter screen, wherein the used filter screen is 210 meshes, cooling the electrostatic spinning solution after filtering, sending the electrostatic spinning solution into a homogenizer after cooling to normal temperature, homogenizing the electrostatic spinning solution, removing floating foam on the upper layer of the electrostatic spinning solution after homogenizing for 10min, and then taking the electrostatic spinning solution of which the upper layer does not contain bottom impurities;

step two: secondary spinning

Filling an electrostatic spinning solution into an electrostatic spinning machine, prefabricating a box body with an opening at the top, arranging an ultraviolet lamp on the inner side of the box body, embedding and installing glass at the opening at the top of the box body, conveying the prefabricated box body to the position right below a spinning nozzle of the electrostatic spinning machine, wherein the distance between the glass at the top of the prefabricated box body and a spinning needle of the electrostatic spinning machine is 32cm, and the spinning nozzle needle of the electrostatic spinning machine is vertical to the prefabricated box body; starting an electrostatic spinning machine, starting spinning on the glass surface at the top of the prefabricated box body, enabling a spinning needle moving path of the electrostatic spinning machine to be in a transverse Z shape relative to the electrostatic spinning machine body, controlling the spinning needle moving path of the electrostatic spinning machine to be adjusted to be in a vertical Z shape relative to the electrostatic spinning machine body after the thickness of the spun fabric reaches 0.7mm, continuing spinning, and stopping after the thickness of the spun fabric reaches 1.3mm to obtain the electrostatic spinning fabric;

step three: ultraviolet curing

Before the electrostatic spinning operation, a shading cover is used for shielding the electrostatic spinning machine and the prefabricated box body, in the process of the electrostatic spinning operation, an ultraviolet lamp on the inner side of the prefabricated box body is simultaneously started, the ultraviolet lamp carries out solidification and sterilization treatment on the spinning sprayed on the glass, and the irradiation time of the ultraviolet lamp is synchronous with the electrostatic spinning operation time;

step four: two-dipping and one-rolling

Pouring a prefabricated padding liquid into a padding pool, wherein the padding liquid comprises the following raw materials in parts by weight: 6.5% of quaternary ammonium salt, 3.4% of caustic soda, 2.6% of penetrant, 2.4% of anti-migration agent and the balance of water, preheating the padding liquid to 48 ℃, taking off the electrostatic spinning fabric on the glass, sending the fabric into a preheated padding pool for soaking, controlling the temperature in the padding pool to rise to 55 ℃ after soaking for 15min, and continuing to soak for 10 min; winding and sleeving the electrostatic spinning fabric on a roller immersed in the prefabricated mangling liquid, extruding and pushing the electrostatic spinning fabric below the liquid level by using the roller, wherein the length of the extruded electrostatic spinning fabric is 1.15 in a stretching ratio relative to the length before extrusion: 1;

taking the electrostatic spinning fabric out of the padding pool, sending the electrostatic spinning fabric into a dust-free environment, air-drying the electrostatic spinning fabric by using a fan, and obtaining the nanofiber electrostatic spinning medical protective clothing fabric after the electrostatic spinning fabric is completely dried.

Example two:

a preparation method of nanofiber electrostatic spinning medical protective clothing fabric can solve the problems of low process efficiency and poor finished product quality: a preparation method of nanofiber electrostatic spinning medical protective clothing fabric comprises the following steps:

the method comprises the following steps: solution preparation

Feeding corresponding electrostatic spinning solution raw materials into a ball mill for grinding, wherein the rotating speed of the ball mill is 1480rpm, the ground powdery raw materials can pass through a 210-mesh screen, and after grinding, feeding the powdery raw materials and corresponding parts by weight of water into a hot melting machine for hot melting, wherein the electrostatic spinning solution raw materials comprise the following components in parts by weight: 40 parts of hot melt adhesive for fabrics, 21 parts of polylactic acid, 14 parts of methanol, 9 parts of animal fat and 6 parts of polystyrene, controlling the hot melting temperature to be 180 ℃, heating the water to ensure that the raw materials of the electrostatic spinning solution are completely melted into liquid, wherein the weight part of the water is 0.4 times of the sum of the weight parts of the powdery raw materials; filtering the hot-melted electrostatic spinning solution by using a filter screen, wherein the used filter screen is 240 meshes, cooling the electrostatic spinning solution after filtering, sending the electrostatic spinning solution into a homogenizer after cooling to normal temperature, homogenizing the electrostatic spinning solution for 15min, removing floating foam on the upper layer of the electrostatic spinning solution, and taking the electrostatic spinning solution of which the upper layer does not contain bottom impurities;

step two: secondary spinning

Filling an electrostatic spinning solution into an electrostatic spinning machine, prefabricating a box body with an opening at the top, arranging an ultraviolet lamp on the inner side of the box body, embedding and installing glass at the opening at the top of the box body, conveying the prefabricated box body to the position right below a spinning nozzle of the electrostatic spinning machine, wherein the distance between the glass at the top of the prefabricated box body and a spinning needle of the electrostatic spinning machine is 36cm, and the spinning nozzle needle of the electrostatic spinning machine is vertical to the prefabricated box body; starting an electrostatic spinning machine, starting spinning on the glass surface at the top of the prefabricated box body, enabling a spinning needle moving path of the electrostatic spinning machine to be in a transverse Z shape relative to the electrostatic spinning machine body, controlling the spinning needle moving path of the electrostatic spinning machine to be adjusted to be in a vertical Z shape relative to the electrostatic spinning machine body after the thickness of the spun fabric reaches 0.9mm, continuing spinning, and stopping after the thickness of the spun fabric reaches 1.5mm to obtain the electrostatic spinning fabric;

step three: ultraviolet curing

Before the electrostatic spinning operation, a shading cover is used for shielding the electrostatic spinning machine and the prefabricated box body, in the process of the electrostatic spinning operation, an ultraviolet lamp on the inner side of the prefabricated box body is simultaneously started, the ultraviolet lamp carries out solidification and sterilization treatment on the spinning sprayed on the glass, and the irradiation time of the ultraviolet lamp is synchronous with the electrostatic spinning operation time;

step four: two-dipping and one-rolling

Pouring a prefabricated padding liquid into a padding pool, wherein the padding liquid comprises the following raw materials in parts by weight: 7.5% of quaternary ammonium salt, 4.4% of caustic soda, 3.1% of penetrant, 2.9% of anti-migration agent and the balance of water, preheating the padding liquid to 53 ℃, taking off the electrostatic spinning fabric on the glass, sending the fabric into a preheated padding pool for soaking, controlling the temperature in the padding pool to rise to 60 ℃ after soaking for 20min, and continuing to soak for 14 min; winding and sleeving the electrostatic spinning fabric on a roller immersed in the prefabricated mangling liquid, extruding and pushing the electrostatic spinning fabric below the liquid level by using the roller, wherein the stretching ratio of the length of the extruded electrostatic spinning fabric to the length of the fabric before extrusion is 1.20: 1;

taking the electrostatic spinning fabric out of the padding pool, sending the electrostatic spinning fabric into a dust-free environment, air-drying the electrostatic spinning fabric by using a fan, and obtaining the nanofiber electrostatic spinning medical protective clothing fabric after the electrostatic spinning fabric is completely dried.

Example three:

a preparation method of nanofiber electrostatic spinning medical protective clothing fabric can solve the problems of low process efficiency and poor finished product quality: a preparation method of nanofiber electrostatic spinning medical protective clothing fabric comprises the following steps:

the method comprises the following steps: solution preparation

Feeding corresponding electrostatic spinning solution raw materials into a ball mill for grinding, wherein the rotating speed of the ball mill is 1590rpm, the ground powdery raw materials can pass through a 240-mesh screen, and after grinding, feeding the powdery raw materials and corresponding parts by weight of water into a hot melting machine for hot melting, wherein the electrostatic spinning solution raw materials comprise the following components in parts by weight: 50 parts of hot melt adhesive for fabrics, 24 parts of polylactic acid, 16 parts of methanol, 10 parts of animal fat and 7 parts of polystyrene, controlling the hot melting temperature to be 185 ℃, heating the water to ensure that the raw materials of the electrostatic spinning solution are completely melted into liquid, wherein the weight part of the water is 0.5 time of the sum of the weight parts of the powdery raw materials; filtering the hot-melted electrostatic spinning solution by using a filter screen, wherein the used filter screen is 270 meshes, cooling the electrostatic spinning solution after filtering, sending the electrostatic spinning solution into a homogenizer after cooling to normal temperature, homogenizing the electrostatic spinning solution for 20min, removing floating foam on the upper layer of the electrostatic spinning solution, and taking the electrostatic spinning solution of which the upper layer does not contain bottom impurities;

step two: secondary spinning

Filling an electrostatic spinning solution into an electrostatic spinning machine, prefabricating a box body with an opening at the top, arranging an ultraviolet lamp on the inner side of the box body, embedding and installing glass at the opening at the top of the box body, conveying the prefabricated box body to the position right below a spinning nozzle of the electrostatic spinning machine, wherein the distance between the glass at the top of the prefabricated box body and a spinning needle of the electrostatic spinning machine is 40cm, and the spinning nozzle needle of the electrostatic spinning machine is vertical to the prefabricated box body; starting an electrostatic spinning machine, starting spinning on the glass surface at the top of the prefabricated box body, enabling a spinning needle moving path of the electrostatic spinning machine to be in a transverse Z shape relative to the electrostatic spinning machine body, controlling the spinning needle moving path of the electrostatic spinning machine to be adjusted to be in a vertical Z shape relative to the electrostatic spinning machine body after the thickness of the spun fabric reaches 1.1mm, continuing spinning, and stopping after the thickness of the spun fabric reaches 1.7mm to obtain the electrostatic spinning fabric;

step three: ultraviolet curing

Before the electrostatic spinning operation, a shading cover is used for shielding the electrostatic spinning machine and the prefabricated box body, in the process of the electrostatic spinning operation, an ultraviolet lamp on the inner side of the prefabricated box body is simultaneously started, the ultraviolet lamp carries out solidification and sterilization treatment on the spinning sprayed on the glass, and the irradiation time of the ultraviolet lamp is synchronous with the electrostatic spinning operation time;

step four: two-dipping and one-rolling

Pouring a prefabricated padding liquid into a padding pool, wherein the padding liquid comprises the following raw materials in parts by weight: 8.5% of quaternary ammonium salt, 5.4% of caustic soda, 3.6% of penetrant, 3.4% of anti-migration agent and the balance of water, preheating the padding liquid to 58 ℃, taking off the electrostatic spinning fabric on the glass, sending the fabric into a preheated padding pool for soaking, controlling the temperature in the padding pool to rise to 65 ℃ after soaking for 25min, and continuing soaking for 18 min; winding and sleeving the electrostatic spinning fabric on a roller immersed in the prefabricated mangling liquid, extruding and pushing the electrostatic spinning fabric below the liquid level by using the roller, wherein the length of the extruded electrostatic spinning fabric is 1.25 in a stretching ratio relative to the length before extrusion: 1;

taking the electrostatic spinning fabric out of the padding pool, sending the electrostatic spinning fabric into a dust-free environment, air-drying the electrostatic spinning fabric by using a fan, and obtaining the nanofiber electrostatic spinning medical protective clothing fabric after the electrostatic spinning fabric is completely dried.

Therefore, the fabric of most of the existing medical protective clothing is poor in strength and tear resistance, easy to damage and limited in service life, and the fabric prepared by partially utilizing the electrostatic spinning technology is high in efficiency, but large in thickness limitation, thin in whole material, required to be compounded with base cloth, influenced in efficiency and overall quality of the fabric, influenced in original properties of the electrostatic spinning nano fabric and not beneficial to popularization and use; the preparation method of the nanofiber electrostatic spinning medical protective clothing fabric has the advantages that the moving path of the spinning needle of the electrostatic spinning machine is respectively in a Z shape in the horizontal direction and the vertical direction relative to the electrostatic spinning machine body for twice spinning, the tensile and tear resistance of the spun fabric in each direction is excellent, the daily use requirement of medical workers is met, the service life is prolonged, the overall use cost is reduced, the flat glass is used as a device for receiving electrostatic spinning, the thickness of the spun fabric can be better improved relative to a drum-type receiving device, the limitation of the electrostatic spinning process on the thickness is solved, the integral strength of the formed fabric is improved, meanwhile, the smoothness of the glass is convenient for operators to take down the fabric formed after the jet spinning, the processing time is shortened, and the double effects of improving the spinning curing speed and killing bacteria on the fabric can be achieved by the arrangement of an ultraviolet lamp, the overall efficiency of the process and the quality of the finished fabric are improved, and the use requirements of medical workers are met.