Production process of allergy-free non-woven fabric

Abstract

The invention relates to the field of non-woven fabrics, and provides an allergy-free non-woven fabric production process, which combines the design of an arc-shaped blade of a cutter device with a high-frequency cutting process, so that a fiber cutting section forms a smooth cambered surface structure, burrs and fiber flashes generated by traditional straight blade cutting are thoroughly eliminated, and the quality of the non-woven fabrics is improved. The arc-shaped end part of the cut fiber and the cross lapping technology of the net forming device have a synergistic effect, so that the fiber is in a multidirectional interweaving state in a net-shaped structure, the probability that the fiber end part is in direct contact with skin is reduced, the comfort of the non-woven fabric is improved, the non-woven fabric is in contact with a human body, the human body is not allergic, and the problems that the non-woven fabric fiber has more burrs and the quality of the non-woven fabric is improved are solved. And allergy is easily caused.

Description

Technical Field

[0001] The present invention relates to the field of non-woven fabrics, and particularly to a production process of anti-allergy non-woven fabrics. Background Art

[0002] In modern textile industry, as an important non-woven material, non-woven fabrics are widely used in various fields such as sanitary products (such as diapers, pull-ups), medical protective supplies, clothing fabrics, home decoration, etc. due to their excellent physical properties, good air permeability, cost-effectiveness and processing flexibility. However, with the continuous improvement of consumers' requirements for product comfort, safety and environmental protection, some technical defects existing in the traditional non-woven fabric production process have gradually emerged, especially facing challenges in anti-allergy performance.

[0003] Currently, in the ES fiber extrusion and filament formation technology commonly used in non-woven fabric production, although the strength and elasticity of the fibers are effectively improved, burrs will inevitably be generated at both the head and tail ends during the fiber cutting and forming stage, and some burrs are even extremely sharp. These tiny and sharp burrs, after the non-woven fabric is processed into daily necessities such as diapers, pull-ups or clothes, come into direct contact with the human skin for a long time, especially in the delicate skin of infants or people with sensitive skin types, and are extremely likely to become potential allergens.

[0004] The existence of burrs not only reduces the smoothness of the non-woven fabric surface and affects the comfort of wearing or using, but more importantly, they can stimulate the skin, damage the skin barrier function, cause allergic reactions such as redness, itching, rash, etc., and even may lead to skin breakage and increase the risk of infection in severe cases. For infants, their skin barrier function has not yet been fully developed and is more sensitive to external stimuli, making them prone to allergies. Summary of the Invention

[0005] Therefore, in view of the above problems, the present invention proposes a production process of anti-allergy non-woven fabrics. It solves the technical problem that there are many burrs in non-woven fabric fibers and it is easy to cause allergies.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A production process of anti-allergy non-woven fabrics includes the following processes:

[0008] (1) Raw material preparation process: Select polymer raw materials with anti-allergic properties, such as specially modified polypropylene or polyester chips. The molecular weight distribution index (PDI) of the polymer raw materials is controlled between 2.0 - 3.5 to ensure good melt fluidity and fiber-forming properties of the raw materials. At the same time, an additive composed of a nanoscale antibacterial agent and an antistatic agent is added to the polymer raw materials. The nanoscale antibacterial agent is nanoparticles made of silver ion carriers, with a particle size distribution between 10 - 50 nanometers. The antistatic agent is a polyether ester amide compound. The mass ratio of the additive in the polymer raw materials is 0.5% - 2%, and it is mixed evenly by a high-speed mixer under the condition of a rotation speed of 800 - 1200 revolutions per minute. A fluorescent brightener with a mass ratio of 0.1% - 0.5% is also added to the raw materials to improve the whiteness and gloss of the non-woven fabric.

[0009] (2) Fiber extrusion process: Put the mixed raw materials into the spinning box. The spinning box is internally equipped with a partition temperature control system, which can divide the box from the feed inlet to the spinneret plate direction into a melting section, a metering section, and a homogenizing section in sequence. The temperatures of each section are controlled at 200°C - 280°C, 240°C - 260°C, and 250°C - 270°C respectively, and the temperature fluctuation range of each section is controlled within ±1°C. After the raw materials are melted and extruded, continuous fibers are formed through the spinneret plate.

[0010] (3) Fiber cutting process: The extruded fibers enter the cutting area. The cutting area is provided with a cutter device, which includes a cutter body, a cutter drive mechanism, and a cutter mounting bracket. The cutter body has an arc-shaped blade, the curvature radius of the arc-shaped blade is 5 - 10 millimeters, and a cemented carbide coating with a thickness of 2 - 5 micrometers is provided on the blade surface. The cutter drive mechanism is a servo motor. An installation plate is provided at the output end of the servo motor. The arc-shaped blade is fixed on the installation plate. The arc-shaped blade is located at an eccentric position of the servo motor so that the arc-shaped blade can make a circular motion. The cutting frequency of the cutter body is 800 - 1200 times per minute, and the cutting speed is 1 - 3 meters per second. The cutter body makes an arc motion to precisely cut the fibers at high speed, making the two ends of the fibers an arc surface structure.

[0011] (4) Fiber web-forming process: The cut fiber segments are transported to the web-forming device through an air conveying device. The web-forming device adopts a cross-laying technology. Through the rotation and swing of multiple groups of laying rollers, the fiber segments are evenly spread into a net-like structure. The web-forming device is also provided with an electrostatic eliminator, which is an ion wind rod and can generate a large number of positive and negative ions to neutralize the static electricity generated during the transportation and laying of the fiber segments, preventing the fiber segments from being adsorbed on the surface of the conveying pipeline or laying rollers or being entangled with each other due to static electricity.

[0012] (5) Base fabric flattening process: The reinforced non-woven fabric base fabric enters the flattening device for flattening treatment. The flattening device includes two flattening rollers arranged oppositely up and down. A heating element is provided inside the flattening roller, which can control the surface temperature of the flattening roller at 50°C - 65°C, and the temperature uniformity on the surface of the flattening roller is controlled within ±2°C.

[0013] (6) Base fabric flattening process: The reinforced non-woven fabric base fabric enters the flattening device for flattening treatment. The flattening device includes two flattening rollers arranged oppositely up and down. A heating element is provided inside the flattening roller, which can control the surface temperature of the flattening roller at 50°C - 60°C, and the temperature uniformity on the surface of the flattening roller is controlled within ±2°C.

[0014] (7) Base fabric cooling process: The flattened non-woven fabric base fabric enters the cooling device for cooling treatment. The cooling device includes a cooling fan and a cooling channel. In addition, a temperature monitoring mechanism is provided in the cooling device. The temperature monitoring mechanism includes a temperature sensor and a display instrument connected to the temperature sensor. The temperature sensor can detect the temperature in the cooling channel in real time and display it through the display instrument, so that the operator can adjust the air volume of the cooling fan in time to ensure the cooling effect of the non-woven fabric base fabric.

[0015] (8) Finished product winding process: The cooled non-woven fabric enters the winding device for winding. The winding device includes a winding roller and a winding motor that drives the winding roller to rotate, and the winding roller winds the non-woven fabric.

[0016] Furthermore:

[0017] The surface of the flattening roller is coated with an elastic rubber layer. The hardness of the elastic rubber layer is Shore A60 - A70, and a fine mesh pattern is provided on the surface. The wire diameter of the mesh pattern is 0.1 - 0.3 mm, and the pore diameter is 0.5 - 1 mm. By adjusting the gap between the flattening rollers and the rotation speed of the flattening rollers, the surface of the non-woven fabric base fabric is made flat and smooth. The gap between the flattening rollers is 80% - 90% of the thickness of the non-woven fabric base fabric.

[0018] The flattening device is also provided with a pressure regulating mechanism. The pressure regulating mechanism includes a pressure sensor and a hydraulic cylinder connected to the pressure sensor. The pressure sensor can detect the pressure between the flattening rollers in real time and control the pressure between the flattening rollers by adjusting the piston rod stroke of the hydraulic cylinder, so that the pressure between the flattening rollers is maintained within the range of 5 - 10 N / cm, and the pressure fluctuation range is controlled within ±0.5 N / cm.

[0019] The laying roller of the web-forming device is also provided with a vibration motor. The vibration motor can drive the laying roller to generate micro-vibrations. The vibration frequency is 50 - 100 Hz, and the amplitude is 0.1 - 0.3 mm, so that the fiber segments can be spread more evenly during the web-laying process.

[0020] The flattening roller of the flattening device is also provided with a cooling device, which cools the flattening roller to prevent the flattening roller from deforming due to excessive temperature during the flattening process. The temperature of the cooling water is 20°C - 30°C, and the flow rate is 2 - 5 liters per minute.

[0021] The winding roller of the winding device is also provided with a length meter, which can detect and display the winding length of the non-woven fabric in real time, so that the operator can replace the winding roller in time or perform other related operations.

[0022] The surface of the winding roller is provided with anti-slip lines, which are strip-shaped protrusions arranged along the axial direction of the winding roller. The height of the strip-shaped protrusions is 0.5 - 1 mm, and the width is 2 - 3 mm.

[0023] The hot rolling roller of the hot rolling reinforcement device is also provided with a temperature compensation mechanism, which includes a temperature sensor and a heating element connected to the temperature sensor. The temperature sensor can detect the temperature at both ends of the hot rolling roller in real time, and compensate for the temperature difference at both ends of the hot rolling roller by adjusting the power of the heating element, so that the temperature on the surface of the hot rolling roller is uniform.

[0024] The flattening device is also provided with a pressure regulating mechanism, which includes a pressure sensor and a hydraulic cylinder connected to the pressure sensor. The pressure sensor can detect the pressure between the flattening rollers in real time, and control the pressure between the flattening rollers by adjusting the stroke of the piston rod of the hydraulic cylinder, so that the pressure between the flattening rollers is maintained within the range of 5 - 10 N / cm, and the pressure fluctuation range is controlled within ±0.5 N / cm.

[0025] In the raw material preparation process, the mixed raw materials need to be deeply dried by a vacuum drying device. The drying temperature is 60°C - 80°C, and the drying time is 1 - 2 hours. The vacuum drying device is also equipped with stirring blades, which slowly rotate at a speed of 5 - 15 revolutions per minute to prevent the raw materials from caking and promote the uniform volatilization of moisture.

[0026] By adopting the foregoing technical solutions, the beneficial effects of the present invention are:

[0027] The present invention combines the arc-shaped cutting edge design (curvature radius 5-10 mm) of the cutting tool device with the high-frequency cutting process (cutting frequency 800-1200 times / minute), enabling the fiber cutting section to form a smooth arc surface structure, completely eliminating the burrs and fiber fraying generated by traditional straight-edge cutting. The arc-shaped ends after fiber cutting cooperate with the cross-laying technology of the web-forming device, making the fibers in a multi-directional intertwined state in the network structure, reducing the probability of the fiber ends directly contacting the skin, improving the comfort of the non-woven fabric, and preventing the human body from being allergic when in contact with the non-woven fabric. The micron-level network texture (wire diameter 0.1-0.3 mm, pore diameter 0.5-1 mm) on the surface of the flattening roller cooperates with the elastic rubber layer (Shore A60-A70), performing secondary physical trimming on the fiber ends during the flattening process, making the surface flatness of the non-woven fabric reach Ra0.8-1.2μm, far superior to the industry standard (Ra3.2μm). The silver ion carrier nano-antibacterial agent (particle size 10-50 nm) added to the raw materials forms a uniformly distributed antibacterial phase inside the fibers. After testing, the antibacterial rate against Staphylococcus aureus and Escherichia coli reaches 99.9%, effectively blocking the allergic reactions caused by microbial stimulation. The partitioned temperature control system of the spinning box and the temperature compensation mechanism of the spinneret plate act jointly to ensure that the coefficient of variation (CV value) of the fiber diameter is controlled within 2%, providing a stable raw material basis for the formation of the arc-shaped ends. The finished non-woven fabric has both biocompatibility and physical properties (tensile strength ≥ 35 N / 5 cm), and can be directly used in fields such as medical dressings, baby products, and high-end hygiene materials. After clinical tests, the incidence of contact dermatitis is reduced by 85% compared with traditional products. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention.

[0029] Figure 2 is a schematic structural diagram of the arc-shaped cutting edge. DETAILED DESCRIPTION OF THE INVENTION

[0030] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0031] Reference Figure 1 and Figure 2 This embodiment provides an anti-allergy non-woven fabric production process, including the following processes:

[0032] (1) Raw material preparation process: Select polymer raw materials with anti-allergic properties, such as specially modified polypropylene or polyester chips. The molecular weight distribution index (PDI) of the polymer raw materials is controlled between 2.0 and 3.5 to ensure good melt fluidity and fiber-forming properties of the raw materials. At the same time, an additive composed of a nano-scale antibacterial agent and an antistatic agent is added to the polymer raw materials. The nano-scale antibacterial agent is nano-particles made of silver ion carriers, with a particle size distribution between 10 and 50 nanometers. The antistatic agent is a polyether ester amide compound. The mass ratio of the additive in the polymer raw materials is 0.5%-2%, and it is mixed evenly by a high-speed mixer under the condition of a rotation speed of 800-1200 revolutions per minute. A fluorescent brightener with a mass ratio of 0.1%-0.5% is also added to the raw materials to improve the whiteness and gloss of the non-woven fabric.

[0033] (2) Fiber extrusion process: Put the mixed raw materials into the spinning box. There is a partition temperature control system inside the spinning box, which can divide the box into a melting section, a metering section, and a homogenizing section in sequence from the feed inlet to the spinneret plate. The temperatures of each section are controlled at 200°C-280°C, 240°C-260°C, and 250°C-270°C respectively, and the temperature fluctuation range of each section is controlled within ±1°C. After the raw materials are melted and extruded, continuous fibers are formed through the spinneret plate.

[0034] (3) Fiber cutting process: The extruded fibers enter the cutting area. The cutting area is provided with a cutter device, which includes a cutter body, a cutter drive mechanism, and a cutter mounting frame. The cutter body has an arc-shaped blade 13. The curvature radius of the arc-shaped blade 13 is 5-10 millimeters, and a cemented carbide coating with a thickness of 2-5 microns is provided on the blade surface. The cutter drive mechanism is a servo motor 11. An installation plate is provided at the output end of the servo motor 11. The arc-shaped blade 13 is fixed on the installation plate. The arc-shaped blade 13 is located at an eccentric position of the servo motor 11 so that the arc-shaped blade 13 can make a circular motion. The cutting frequency of the cutter body is 800-1200 times per minute, and the cutting speed is 1-3 meters per second. The cutter body makes an arc motion to cut the fibers at high speed and precisely, so that both ends of the fibers are arc-shaped structures.

[0035] (4) Fiber web-forming process: The cut fiber segments are transported to the web-forming device through an air conveying device. The web-forming device adopts a cross-laying technology. Through the rotation and swing of multiple groups of laying rollers, the fiber segments are evenly spread into a net-like structure. The web-forming device is also provided with an electrostatic eliminator, which is an ion wind rod and can generate a large number of positive and negative ions to neutralize the static electricity generated by the fiber segments during transportation and laying, preventing the fiber segments from being adsorbed on the surface of the conveying pipeline or laying rollers or being entangled with each other due to static electricity.

[0036] (5) Base fabric flattening process: The reinforced non-woven fabric base fabric enters the flattening device for flattening treatment. The flattening device includes two flattening rollers arranged oppositely, one above the other. Heating elements are provided inside the flattening rollers, which can control the surface temperature of the flattening rollers within 50°C - 65°C, and the temperature uniformity on the surface of the flattening rollers is controlled within ±2°C.

[0037] (6) Base fabric flattening process: The reinforced non-woven fabric base fabric enters the flattening device for flattening treatment. The flattening device includes two flattening rollers arranged oppositely, one above the other. Heating elements are provided inside the flattening rollers, which can control the surface temperature of the flattening rollers within 50°C - 60°C, and the temperature uniformity on the surface of the flattening rollers is controlled within ±2°C.

[0038] (7) Base fabric cooling process: The flattened non-woven fabric base fabric enters the cooling device for cooling treatment. The cooling device includes a cooling fan and a cooling channel; in addition, a temperature monitoring mechanism is provided in the cooling device. The temperature monitoring mechanism includes a temperature sensor and a display instrument connected to the temperature sensor. The temperature sensor can detect the temperature inside the cooling channel in real time and display it through the display instrument, so that the operator can adjust the air volume of the cooling fan in time to ensure the cooling effect of the non-woven fabric base fabric.

[0039] (8) Finished product winding process: The cooled non-woven fabric enters the winding device for winding. The winding device includes a winding roller and a winding motor that drives the winding roller to rotate, and the winding roller winds the non-woven fabric.

[0040] In one embodiment, the surface of the flattening roller is coated with an elastic rubber layer. The hardness of the elastic rubber layer is Shore A60 - A70, and fine mesh patterns are provided on the surface. The wire diameter of the mesh patterns is 0.1 - 0.3 mm, and the pore diameter is 0.5 - 1 mm; by adjusting the gap between the flattening rollers and the rotation speed of the flattening rollers, the surface of the non-woven fabric base fabric is made flat and smooth, and the gap between the flattening rollers is 80% - 90% of the thickness of the non-woven fabric base fabric.

[0041] In one embodiment, the flattening device is further provided with a pressure regulating mechanism. The pressure regulating mechanism includes a pressure sensor and a hydraulic cylinder connected to the pressure sensor. The pressure sensor can detect the pressure between the flattening rollers in real time and control the pressure between the flattening rollers by adjusting the piston rod stroke of the hydraulic cylinder, so that the pressure between the flattening rollers is maintained within the range of 5 - 10 N / cm, and the pressure fluctuation range is controlled within ±0.5 N / cm.

[0042] In one embodiment, the laying roller of the web-forming device is further provided with a vibration motor. The vibration motor can drive the laying roller to generate micro-vibrations. The vibration frequency is 50 - 100 Hz, and the amplitude is 0.1 - 0.3 mm, so that the fiber segments can be spread more evenly during the web-laying process.

[0043] In one embodiment, the flattening roller of the flattening device is also provided with a cooling device, which cools the flattening roller to prevent the flattening roller from deforming due to excessive temperature during the flattening process. The temperature of the cooling water is 20°C - 30°C, and the flow rate is 2 - 5 liters per minute.

[0044] In one embodiment, the winding roller of the winding device is also provided with a length meter, which can detect and display the winding length of the non-woven fabric in real time, so that the operator can replace the winding roller in time or perform other related operations.

[0045] In one embodiment, the surface of the winding roller is provided with anti-slip patterns, which are strip-shaped protrusions arranged along the axial direction of the winding roller. The height of the strip-shaped protrusions is 0.5 - 1 mm, and the width is 2 - 3 mm.

[0046] In one embodiment, the hot rolling roller of the hot rolling reinforcement device is also provided with a temperature compensation mechanism, which includes a temperature sensor and a heating element connected to the temperature sensor. The temperature sensor can detect the temperature at both ends of the hot rolling roller in real time, and compensate for the temperature difference at both ends of the hot rolling roller by adjusting the power of the heating element, so that the temperature on the surface of the hot rolling roller is uniform.

[0047] In one embodiment, the flattening device is also provided with a pressure regulating mechanism, which includes a pressure sensor and a hydraulic cylinder connected to the pressure sensor. The pressure sensor can detect the pressure between the flattening rollers in real time, and control the pressure between the flattening rollers by adjusting the stroke of the piston rod of the hydraulic cylinder, so that the pressure between the flattening rollers is maintained within the range of 5 - 10 N / cm, and the pressure fluctuation range is controlled within ±0.5 N / cm.

[0048] In one embodiment, in the raw material preparation process, the mixed raw materials need to be deeply dried by a vacuum drying device. The drying temperature is 60°C - 80°C, and the drying time is 1 - 2 hours. The vacuum drying device is also equipped with stirring blades, which slowly rotate at a speed of 5 - 15 revolutions per minute to prevent the raw materials from caking and promote the uniform volatilization of moisture.

[0049] In one embodiment, the die holes of the spinneret are arranged in a circular array, the diameter of the die holes is 0.3 - 0.8 mm, and a flow guiding groove is provided at the outlet of each die hole. The depth of the flow guiding groove is 0.1 - 0.3 mm, and the width is 0.2 - 0.5 mm, which is used to guide the extrusion direction of the fibers and make the fiber surface smooth. The spinneret is also provided with a temperature compensation mechanism, which includes a temperature sensor and a heating element connected to the temperature sensor. The temperature sensor can detect the temperature at the die head outlet in real time, and compensate for the temperature difference at the die head outlet by adjusting the power of the heating element, so that the temperature at the die head outlet is uniform.

[0050] In one embodiment, the surface of the flattening roller is coated with an elastic rubber layer. The hardness of the elastic rubber layer is Shore A 60 - A 70, and the surface is provided with fine mesh patterns. The wire diameter of the mesh patterns is 0.1 - 0.3 mm, and the pore diameter is 0.5 - 1 mm. By adjusting the gap between the flattening rollers and the rotation speed of the flattening rollers, the surface of the non-woven fabric base cloth is made flat and smooth. The gap between the flattening rollers is 80% - 90% of the thickness of the non-woven fabric base cloth, and the rotation speed of the flattening rollers is matched with the production speed of the non-woven fabric.

[0051] In one embodiment, the number of the laying rollers is 4 - 8 groups. The rotation speed of each group of laying rollers is 10 - 30 revolutions per minute, and the swing amplitude is ±30° to ±60°.

[0052] In one embodiment, in the base cloth flattening process, a micron-level groove structure engraved by laser is further provided on the surface of the elastic rubber layer of the flattening roller. The depth of the groove structure is 10 - 30 microns, the width is 50 - 100 microns, and the arrangement density is 100 - 300 per square centimeter. The micron-level groove structure can store a small amount of air during the flattening process to form a dynamic air cushion effect, which can reduce the friction coefficient between the fibers and the roller surface while ensuring the flattening effect and reduce fiber damage.

[0053] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. A production process for anti-allergic nonwoven fabrics, characterized in that: Including the following processes: (1) Raw material preparation process: Select polymer raw materials with anti-allergic properties, such as specially modified polypropylene or polyester chips, and control the molecular weight distribution index (PDI) of the polymer raw materials between 2.0 and 3.5 to ensure that the raw materials have good melt fluidity and fiber-forming properties; at the same time, add an additive mixed with a nano-scale antibacterial agent and an antistatic agent to the polymer raw materials, wherein the nano-scale antibacterial agent is nanoparticles made of silver ion carriers with a particle size distribution between 10 and 50 nanometers, and the antistatic agent is a polyether ester amide compound, and the additive accounts for 0.5% to 2% by weight in the polymer raw materials, and is mixed uniformly by a high-speed mixer at a speed of 800 to 1200 rpm; a fluorescent brightener accounting for 0.1% to 0.5% by weight is also added to the raw materials to improve the whiteness and glossiness of the non-woven fabric; (2) Fiber extrusion process: the mixed raw materials are put into a spinning manifold, and a zoned temperature control system is provided inside the spinning manifold, which can divide the manifold from the feed port to the spinneret into a melting section, a metering section, and a homogenizing section in sequence. The temperature of each section is controlled at 200°C-280°C, 240°C-260°C, and 250°C-270°C, respectively, and the temperature fluctuation range of each section is controlled within ±1°C; after the raw materials are melted and extruded, they pass through the spinneret to form continuous fibers; (3) Fiber cutting process: the extruded fiber enters the cutting area, and the cutting area is provided with a cutter device, which includes a cutter body, a cutter drive mechanism and a cutter mounting frame; the cutter body has an arc-shaped blade, the radius of curvature of the arc-shaped blade is 5-10 mm, and the surface of the blade is provided with a hard alloy coating, and the coating thickness is 2-5 μm; the cutter drive mechanism is a servo motor, and the output end of the servo motor is provided with a mounting plate, and the arc-shaped blade is fixed on the mounting plate, and the arc-shaped blade is located at an eccentric position of the servo motor so that the arc-shaped blade can make a circular motion, the cutting frequency of the cutter body is 800-1200 times per minute, and the cutting speed is 1-3 m / s. The cutter body makes an arc motion to cut the fiber at high speed and accurately, so that both ends of the fiber have an arc surface structure; (4) Fiber web forming process: The cut fiber segments are transported to the web forming device through the air conveying device. The web forming device adopts the cross-laying technology. Through the rotation and swing of multiple sets of web laying rollers, the fiber segments are evenly spread into a web structure. The web forming device is also provided with an electrostatic eliminator. The electrostatic eliminator is an ion wind rod that can generate a large number of positive and negative ions to neutralize the static electricity generated by the fiber segments during the transportation and web laying process, thereby preventing the fiber segments from being adsorbed on the conveying pipe or the surface of the web laying roller or entangled with each other due to static electricity; (5) Base fabric flattening process: The reinforced non-woven base fabric enters a flattening device for flattening. The flattening device includes two upper and lower flattening rollers arranged opposite to each other. A heating element is arranged inside the flattening roller, and the surface temperature of the flattening roller can be controlled at 50°C-65°C, and the temperature uniformity of the flattening roller surface is controlled within ±2°C; (6) Base fabric flattening process: The reinforced non-woven base fabric enters a flattening device for flattening. The flattening device includes two upper and lower flattening rollers arranged opposite to each other. A heating element is arranged inside the flattening roller, and the surface temperature of the flattening roller can be controlled at 50°C-60°C, and the temperature uniformity of the flattening roller surface is controlled within ±2°C; (7) Fabric cooling process: the flattened nonwoven fabric enters a cooling device for cooling, the cooling device comprising a cooling fan and a cooling channel; in addition, the cooling device is also provided with a temperature monitoring mechanism, the temperature monitoring mechanism comprising a temperature sensor and a display instrument connected to the temperature sensor, the temperature sensor can detect the temperature in the cooling channel in real time and display it through the display instrument, so that the operator can adjust the air volume of the cooling fan in time to ensure the cooling effect of the nonwoven fabric; (8) Finished product winding process: The cooled nonwoven fabric enters a winding device for winding. The winding device includes a winding roller and a winding motor for driving the winding roller to rotate. The winding roller winds up the nonwoven fabric.

2. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The surface of the flattening roller is coated with an elastic rubber layer, the hardness of the elastic rubber layer is Shaw A60-A70, and the surface is provided with fine mesh patterns, the wire diameter of the mesh patterns is 0.1-0.3 mm, and the pore diameter is 0.5-1 mm; by adjusting the gap between the flattening rollers and the rotation speed of the flattening rollers, the surface of the non-woven base cloth is made flat and smooth, and the gap between the flattening rollers is 80%-90% of the thickness of the non-woven base cloth.

3. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The flattening device is also provided with a pressure regulating mechanism, which includes a pressure sensor and a hydraulic cylinder connected to the pressure sensor. The pressure sensor can detect the pressure between the flattening rollers in real time, and control the pressure between the flattening rollers by adjusting the piston rod stroke of the hydraulic cylinder, so that the pressure between the flattening rollers is maintained within the range of 5-10 N / cm, and the pressure fluctuation range is controlled within ±0.5 N / cm.

4. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The web laying roller of the web forming device is also provided with a vibration motor, which can drive the web laying roller to generate micro-vibration with a vibration frequency of 50-100 Hz and an amplitude of 0.1-0.3 mm, so that the fiber segments can be spread more evenly during the web laying process.

5. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The flattening roller of the flattening device is also provided with a cooling device, which cools the flattening roller to prevent the flattening roller from deforming due to excessive temperature during the flattening process. The cooling water temperature is 20°C-30°C and the flow rate is 2-5 liters / minute.

6. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The winding roller of the winding device is also provided with a meter, which can detect and display the winding length of the non-woven fabric in real time, so that the operator can replace the winding roller in time or perform other related operations.

7. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The surface of the winding roller is provided with anti-skid patterns, which are strip-shaped protrusions arranged along the axial direction of the winding roller. The height of the strip-shaped protrusions is 0.5-1 mm and the width is 2-3 mm.

8. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The hot rolling roller of the hot rolling reinforcement device is also provided with a temperature compensation mechanism, which includes a temperature sensor and a heating element connected to the temperature sensor. The temperature sensor can detect the temperature at both ends of the hot rolling roller in real time, and compensate for the temperature difference at both ends of the hot rolling roller by adjusting the power of the heating element, so that the temperature of the surface of the hot rolling roller is uniform.

9. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: The flattening device is also provided with a pressure regulating mechanism, which includes a pressure sensor and a hydraulic cylinder connected to the pressure sensor. The pressure sensor can detect the pressure between the flattening rollers in real time, and control the pressure between the flattening rollers by adjusting the piston rod stroke of the hydraulic cylinder, so that the pressure between the flattening rollers is maintained within the range of 5-10 N / cm, and the pressure fluctuation range is controlled within ±0.5 N / cm.

10. The process for producing an anti-allergic nonwoven fabric according to claim 1, characterized in that: In the raw material preparation process, the mixed raw materials need to be deeply dried by a vacuum drying device at a drying temperature of 60°C-80°C and a drying time of 1-2 hours; the vacuum drying device is also equipped with a stirring blade, which rotates slowly at a speed of 5-15 rpm to prevent the raw materials from agglomerating and promote uniform volatilization of water.

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