A spunlace nonwoven fabric made of a degradable material and its manufacturing method

Abstract

The present invention relates to a spunlace non-woven fabric made of degradable materials, which includes connecting degradable fibers, load-bearing degradable fibers, and decorative degradable fibers. Among them, the load-bearing degradable fibers form a number of sandwich load-bearing layers with a rectangular cross-section. Adjacent two sandwich load-bearing layers are connected to each other by a number of connecting degradable fibers. Each sandwich load-bearing layer is connected to each other to form a core layer. The decorative degradable fibers form a degradable decorative layer, and the degradable decorative layer is respectively coated on the upper surface and the lower surface of the core layer. Its preparation process includes three steps: fabric processing, slurry preparation, and secondary textile processing. The present invention has good structural strength, and can flexibly adjust the pattern and structure of the non-woven fabric according to the usage needs, so as to flexibly meet the usage needs of various usage scenarios. In addition, during the degradation process, the structure of the non-woven fabric can be degraded in a controllable and orderly manner, preventing a large amount of fiber debris from being generated due to the disorderly degradation of the non-woven fabric and causing pollution to the surrounding environment.

Description

Technical Field

[0001] The present invention relates to a spunlace non-woven fabric made of degradable materials and a method thereof, belonging to the technical field of textiles. Background Art

[0002] In actual use, it is found that the current non-woven fabrics often have a single fiber layer, resulting in poor structural strength of the non-woven fabric and inability to be flexibly adjusted according to usage needs, thus affecting the performance of the non-woven fabric and limiting its usage scenarios. At the same time, during the degradation process of the current non-woven fabrics, the entire fabric or the overall textile structure often degrades disorderly simultaneously, and users cannot predict the degradation process in advance, which brings great inconvenience to the use. In addition, due to the large amount of disorderly degradation of textiles, a large amount of fiber debris will be generated in a short time, resulting in great difficulty in cleaning a large amount of debris and causing pollution to the surrounding environment.

[0003] Therefore, based on the problems existing in the current textile mechanical property detection work, it is necessary to develop a spunlace non-woven fabric made of degradable materials and a method thereof to meet the actual usage needs. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a spunlace non-woven fabric made of degradable materials and a method thereof to overcome the above defects and meet the needs of actual equipment operation.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] A spunlace non-woven fabric made of degradable materials includes degradable fibers for connection, degradable fibers for bearing, and degradable fibers for decoration. Among them, the degradable fibers for bearing form several sandwich bearing layers with a rectangular cross-section, and each sandwich bearing layer is distributed in the same layer. At the same time, adjacent sandwich bearing layers are connected to each other by several degradable fibers for connection, and the distance between adjacent sandwich bearing layers is 0.5 - 2 millimeters. At the same time, each sandwich bearing layer is connected to form a core layer, and the degradable fibers for decoration form a degradable decoration layer, and the degradable decoration layer covers the upper surface and the lower surface of the core layer respectively, and the core layer and the degradable decoration layers connected to its upper surface and lower surface are connected by several degradable fibers for connection.

[0007] Further, the sandwich bearing layer is a mesh structure with a pore size of 0.5 - 1.5, and its mesh holes are in any one of a rectangular shape and a parallelogram shape. At the same time, the thickness of the sandwich bearing layer is 0.8 - 1.5 times the total thickness of the two surface degradable decoration layers.

[0008] Further, among the degradable fibers for connection, the degradable fibers for bearing, and the degradable fibers for decoration, the degradation time of the degradable fibers for bearing is at least 10 days longer than that of the degradable fibers for connection. At the same time, the degradation time of the degradable fibers for bearing is at least 20 days longer than that of the degradable fibers for decoration, and the degradation time of the degradable fibers for bearing is at least 5 days longer than that of the degradable fibers for connection.

[0009] Further, the degradable decorative layer and the core layer are connected by a degradable glue, and the degradable glue penetrates into the degradable decorative layer and the core layer respectively. In addition, a fiber protectant is provided on the surface of the degradable decorative layer.

[0010] A preparation process of a spunlace non-woven fabric made of a degradable material includes the following steps:

[0011] S1, fabric processing: Using textile equipment, process the sandwich bearing layer and the degradable decorative layer respectively, and independently wind and store the manufactured sandwich bearing layer and degradable decorative layer. At the same time, perform secondary weaving on the prepared sandwich bearing layers through the degradable fibers for connection to prepare the core layer, and wind and store the core layer.

[0012] S2, slurry preparation: Using a slurry mixing device, first dilute the degradable glue into a glue solution with a concentration not greater than 50%, then add the fiber protectant to the glue solution and mix it thoroughly with the glue solution to obtain a protective liquid. The dosage of the fiber protectant is 30% - 70% of the dosage of the degradable glue, and after stirring evenly, store it at a constant temperature of 25°C - 40°C.

[0013] S3, secondary weaving processing: Perform secondary weaving processing on the core layer and the degradable decorative layer prepared in step S1 through the degradable fibers for connection to obtain a non-woven fabric substrate, and transport the prepared non-woven fabric substrate to the slurry mixing device in step S2 through a conveying device, so that the non-woven fabric substrate is soaked in the protective liquid by the slurry mixing device, and then the soaked non-woven fabric substrate is dried. After drying, the finished non-woven fabric can be obtained, and the finished non-woven fabric is wound and stored in a dry place.

[0014] Further, the slurry mixing device in the step S2 includes a bearing frame, a liquid storage tank, guide rollers, a swing mechanism, a connecting arm, an inclination sensor, a torque sensor, a temperature and humidity sensor, a turning mechanism, and a driving circuit. The bearing frame is a frame structure with a rectangular cross-section. The liquid storage tank is embedded in the bearing frame, and its axis forms an angle of 0° - 30° with the horizontal plane. There are two guide rollers located outside the front and rear end faces of the liquid storage tank, and their axes are perpendicularly distributed to the axis of the liquid storage tank. The guide rollers are connected to the bearing frame through connecting arms, and the rear end face of the connecting arm is hinged to the bearing frame through a swing mechanism. The axis of the connecting arm forms an angle of 10° - 60° with the bottom of the liquid storage tank, and the axes of the guide rollers are all above the upper end face of the liquid storage tank. At the same time, an inclination sensor is additionally provided on the outer side of the connecting arm, a torque sensor is additionally provided at the turning mechanism, the temperature and humidity sensor is embedded in the roller surface of the guide roller, and at least two temperature and humidity sensors are provided on each guide roller, and the temperature and humidity sensors are evenly distributed around the axis of the guide roller. The driving circuit is connected to the outer side of the bearing frame and is electrically connected to the liquid storage tank, the swing mechanism, the inclination sensor, the torque sensor, and the temperature and humidity sensor respectively.

[0015] Further, the liquid storage tank includes a bearing tank, a sealing cover, supporting rollers, a lifting driving mechanism, pressing rollers, a pressure sensor, a temperature sensor, a liquid level sensor, a water drainage mechanism, and an electric heating mechanism. The bearing tank is a trough-shaped structure with an inverted isosceles trapezoid cross-section, and its upper end face is connected to the sealing cover to form a closed cavity structure. A guiding hole is provided on each of the front and rear end faces of the bearing tank, and the two guiding holes are coaxially distributed and distributed along the axis of the bearing tank. A feeding port and an exhaust port are provided on the sealing cover. There are two supporting rollers located in the bearing tank and connected to the front and rear end faces of the bearing tank respectively. The supporting rollers are located below the guiding holes and their roller surfaces are flush with the axis of the guiding holes. There are at least two pressing rollers and one water drainage mechanism. The pressing rollers and the water drainage mechanism are both located in the bearing tank and distributed along the axis of the bearing tank, and the water drainage mechanism is located between the pressing rollers and the supporting roller at the rear end face of the bearing tank. The pressing rollers are parallel to the supporting rollers, and both ends of the pressing rollers and the water drainage mechanism are slidably connected to the side wall of the bearing tank through a lifting driving mechanism. The pressing rollers are connected to the lifting driving mechanism through sliders, and a pressure sensor is additionally provided at the connection position of the slider and the pressing roller. The liquid level sensor and the temperature sensor are both located in the bearing tank. Among them, there are several temperature sensors, all of which are connected to the lower end face of the sealing cover and distributed along the axis of the bearing tank. The liquid level sensor is connected to the side wall of the bearing tank. The electric heating mechanism is embedded in the bottom of the bearing tank and distributed along the axis of the bearing tank. The lifting driving mechanism, the pressure sensor, the temperature sensor, the liquid level sensor, the water drainage mechanism, and the electric heating mechanism are all electrically connected to the driving circuit.

[0016] Furthermore, the water draining mechanism includes a slider, a bracket, a flipping mechanism, water draining rollers, a hot air blower, a pressure sensor, and a temperature and humidity sensor. The bracket is a trough-shaped structure with a "U"-shaped cross-section. Its outer side is hinged to the slider through the flipping mechanism and is connected to the lifting drive mechanism through the slider. The bottom of the bracket forms an angle of 0° - 45° with the horizontal plane. There are several water draining rollers, and every two water draining rollers form a working group. Each working group is located inside the bracket and is distributed along the axis of the bracket. The two ends of the water draining rollers are hinged to the inner side of the bracket through a swinging mechanism. The axes of the water draining rollers are perpendicularly distributed to the axis of the bearing groove. At the same time, the two water draining rollers in the same working group are distributed vertically, and the distance between the two water draining rollers is 0 - 10 mm. There is at least one hot air blower, which is located in front of two adjacent working groups. The hot air blower is hinged to the inner side of the bracket through a swinging mechanism, is located above the midline of the working group, and the axis of the hot air blower forms an angle of 10° - 90° with the bottom of the bracket. There are several pressure sensors and temperature and humidity sensors. At least two pressure sensors and temperature and humidity sensors are arranged inside the roller surface of each water draining roller, and the pressure sensors and temperature and humidity sensors are evenly distributed around the axis of the water draining roller. The flipping mechanism, the hot air blower, the pressure sensor, and the temperature and humidity sensor are all electrically connected to the drive circuit.

[0017] Furthermore, the drive circuit is a circuit system based on a programmable controller. At the same time, the drive circuit is additionally provided with a communication gateway and establishes a data connection with an external communication network through the communication gateway.

[0018] The present invention has good structural strength and can flexibly adjust the decorative pattern and structure of the non-woven fabric according to the usage needs, so as to flexibly meet the usage needs of various usage scenarios. At the same time, during operation, it has good degradability. While meeting the environmental protection needs, it can also achieve controllable and orderly degradation of the non-woven fabric structure during the degradation process. While effectively extending the service life and stability of the non-woven fabric, it can also give a prompt to the user during the degradation process, overcoming the inconvenience caused to the user by the overall failure of the traditional non-woven fabric during disordered degradation. At the same time, it also prevents a large amount of fiber debris from being generated due to the disordered degradation of the non-woven fabric, causing pollution to the surrounding environment and increasing the cleaning difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0020] Figure 1 It is a schematic partial cross-sectional structure diagram of the non-woven fabric of the present invention;

[0021] Figure 2 It is a schematic partial structure diagram of the connection relationship between the sandwich bearing layers;

[0022] Figure 3 It is a schematic partial structure diagram of the degradable decorative layer;

[0023] Figure 4 This is a schematic diagram of the usage process of the present invention;

[0024] Figure 5 This is a schematic cross-sectional structure diagram of the slurry mixing equipment;

[0025] Figure 6 This is a schematic partial side cross-sectional structure diagram of the liquid storage tank;

[0026] Figure 7 This is a schematic partial cross-sectional structure diagram of the liquid storage tank;

[0027] Figure 8 This is a schematic partial side cross-sectional structure diagram of the water drainage mechanism;

[0028] Figure 9 This is a schematic partial cross-sectional structure diagram of the water drainage mechanism. Specific embodiments

[0029] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0030] As Figures 1-3 shown, a spunlace non-woven fabric made of degradable materials includes degradable fibers 101 for connection, degradable fibers 102 for bearing, and degradable fibers 103 for decoration. Among them, the degradable fibers 102 for bearing form a number of sandwich bearing layers 1021 with a rectangular cross-section, and each sandwich bearing layer 1021 is distributed in the same layer. At the same time, adjacent sandwich bearing layers 1021 are connected to each other by a number of degradable fibers 101 for connection, and the distance between adjacent sandwich bearing layers 1021 is 0.5 - 2 millimeters. At the same time, each sandwich bearing layer 1021 is connected to form a core layer 1022. The degradable fibers 103 for decoration form a degradable decoration layer 1031, and the degradable decoration layer 1031 covers the upper surface and the lower surface of the core layer 1022 respectively. And the core layer 1022 and the degradable decoration layer 1031 connected to its upper surface and lower surface are connected by a number of degradable fibers 101 for connection.

[0031] In this embodiment, the axis of the degradable fiber 101 for connection between the degradable decoration layer 1031 and the core layer 1022 forms an angle of 30° - 120° with the surface of the degradable decoration layer 1031 and the core layer 1022.

[0032] In this embodiment, the sandwich bearing layer 1021 is a mesh structure with a pore size of 0.5 - 1.5, and its mesh holes are any one of parallelograms. At the same time, the thickness of the sandwich bearing layer 1021 is 0.8 - 1.5 times the total thickness of the two surface degradable decoration layers 1031.

[0033] In this embodiment, among the communication degradable fibers 101, the load-bearing degradable fibers 102, and the decorative degradable fibers 103, the degradation time of the load-bearing degradable fibers 102 is at least 10 days longer than that of the communication degradable fibers 101, and the degradation time of the load-bearing degradable fibers 101 is at least 20 days longer than that of the decorative degradable fibers 103, and the degradation time of the load-bearing degradable fibers is at least 5 days longer than that of the communication degradable fibers.

[0034] By setting the degradation speed difference between the contact degradable fiber 101, the load-bearing degradable fiber 102, and the decorative degradable fiber 103, the degradation time of the contact degradable fiber 101 is the shortest, and the contact degradable fiber 101 is degraded and invalidated first, so that the non-woven fabric textile is firstly made to maintain the overall structural stability while partially reducing the structural strength of the non-woven fabric, thereby providing the user with a prompt operation of the degradation status of the non-woven fabric, and after the contact degradable fiber is degraded, the degradable decorative layer and the core layer are separated, so that the non-woven fabric is not degraded and invalidated, and a large amount of fiber debris is prevented from being generated at the same time;

[0035] At the same time, the load-bearing degradable fibers take longer to degrade than the decorative degradable fibers, so that when the decorative layer structure of the non-woven fabric fails first, the sandwich load-bearing layer still has a complete structure, so that the non-woven fabric can achieve the purpose of gradual failure and degradation.

[0036] In this embodiment, the degradable decorative layer 1031 and the core layer 1022 are connected by degradable adhesive, and the degradable adhesive penetrates into the degradable decorative layer 1031 and the core layer 1022 respectively. In addition, a fiber protective agent is provided on the surface of the degradable decorative layer 1031.

[0037] like Figures 4-9 As shown, a process for preparing a spunlace nonwoven fabric of a degradable material comprises the following steps:

[0038] S1, fabric processing, using textile equipment to process and manufacture the sandwich load-bearing layer and the degradable decorative layer respectively, and independently rolling up and storing the manufactured sandwich load-bearing layer and the degradable decorative layer respectively, and at the same time, secondary spinning is performed between the prepared sandwich load-bearing layers through the contacting degradable fiber to prepare the core layer, and the core layer is rolled up and stored;

[0039] S2, slurry preparation, first dilute the degradable glue into a glue solution with a concentration of no more than 50% through a slurry mixing device, then add the fiber protective agent into the glue solution and mix it thoroughly with the glue solution to obtain a protective liquid, and the amount of the fiber protective agent is 30%-70% of the amount of the degradable glue, and after stirring evenly, store it at a constant temperature of 25℃-40℃;

[0040] S3. Secondary textile processing: The core layer and the degradable decorative layer prepared in step S1 are subjected to secondary textile processing through the connecting degradable fibers to obtain a non-woven fabric substrate. Then, the prepared non-woven fabric substrate is transported to the slurry mixing device in step S2 by a conveying device, and the non-woven fabric substrate is soaked in the protective liquid through the slurry mixing device. After that, the soaked non-woven fabric substrate is dried, and the finished non-woven fabric can be obtained after drying. Then, the finished non-woven fabric is wound up and stored in a dry place.

[0041] Among them, the slurry mixing device in step S2 includes a bearing frame 1, a liquid storage tank 2, guide rollers 3, a swing mechanism 4, a connecting arm 5, an inclination sensor 6, a torque sensor 7, a temperature and humidity sensor 8, a flipping mechanism 9 and a drive circuit 10. The bearing frame 1 is a frame structure with a rectangular cross-section. The liquid storage tank 2 is embedded in the bearing frame 1, and its axis forms an angle of 0° - 30° with the horizontal plane. There are two guide rollers 3, which are located outside the front and rear end faces of the liquid storage tank 2, and their axes are perpendicular to the axis of the liquid storage tank 2. The guide rollers 3 are connected to the bearing frame 1 through the connecting arm 5, and the rear end face of the connecting arm 5 is hinged to the bearing frame 1 through the swing mechanism 4. The axis of the connecting arm 5 forms an angle of 10° - 60° with the bottom of the liquid storage tank 2, and the axes of the guide rollers 3 are all above the upper end face of the liquid storage tank 2. At the same time, an inclination sensor 6 is provided on the outer side of the connecting arm 5, and a torque sensor 7 is provided at the flipping mechanism 9. The temperature and humidity sensor 8 is embedded in the roller surface of the guide roller 3. At least two temperature and humidity sensors 8 are provided on each guide roller 3, and the temperature and humidity sensors 8 are evenly distributed around the axis of the guide roller 3. The drive circuit 10 is connected to the outer side of the bearing frame 1 and is electrically connected to the liquid storage tank 2, the swing mechanism 4, the inclination sensor 6, the torque sensor 7 and the temperature and humidity sensor 8 respectively.

[0042] Further optimized, at least one ultrasonic oscillation mechanism 11 is provided on the bottom and side walls of the liquid storage tank 2, and the ultrasonic oscillation mechanism 11 is electrically connected to the drive circuit 10.

[0043] By setting the ultrasonic oscillation mechanism, the glue liquid mixing operation can be effectively realized.

[0044] At the same time, through the cooperation of the flipping mechanism and the connecting arm, the height and relative position between the guide roller and the liquid storage tank are effectively adjusted, so as to adjust the speed and tension of the textile passing through the liquid storage tank.

[0045] It should be emphasized that the liquid storage tank 2 includes a bearing tank 21, a sealing cover 22, a supporting roller 23, a lifting drive mechanism 24, a pressing roller 25, a pressure sensor 26, a temperature sensor, a liquid level sensor, a water draining mechanism 29, and an electric heating mechanism 20. The bearing tank 21 has a trough-shaped structure with an inverted isosceles trapezoid cross-section. Its upper end surface is connected to the sealing cover 22 to form a closed cavity structure. A guiding hole 201 is provided on each of the front end surface and the rear end surface of the bearing tank 21. The two guiding holes 201 are coaxially distributed and along the axial direction of the bearing tank 21. A feeding port 202 and an exhaust port 203 are provided on the sealing cover 22. There are two supporting rollers 23 in total, which are located in the bearing tank 21 and are respectively connected to the front end surface and the rear end surface of the bearing tank 21. The supporting roller 23 is located below the guiding hole 201 and its roller surface is flush with the axis of the guiding hole 201. There are at least two pressing rollers 25 and one water draining mechanism 29. The pressing rollers 25 and the water draining mechanism 29 are both located in the bearing tank 21 and are distributed along the axial direction of the bearing tank 21. The water draining mechanism 29 is located between the pressing rollers 25 and the supporting roller 23 at the rear end surface of the bearing tank 21. The pressing rollers 25 and the supporting rollers 23 are parallel to each other. The two ends of the pressing rollers 25 and the water draining mechanism 29 are respectively slidably connected to the side wall of the bearing tank 21 through the lifting drive mechanism 24. The pressing rollers 25 are connected to the lifting drive mechanism 24 through a slider 204, and a pressure sensor 26 is additionally provided at the connection position of the slider 204 and the pressing roller 25. The liquid level sensor and the temperature sensor are both located in the bearing tank 21. Among them, there are several temperature sensors, which are all connected to the lower end surface of the sealing cover 22 and are distributed along the axial direction of the bearing tank 21. The liquid level sensor is connected to the side wall of the bearing tank 21. The electric heating mechanism 20 is embedded in the bottom of the bearing tank 21 and is distributed along the axial direction of the bearing tank 21. The lifting drive mechanism 24, the pressure sensor 26, the temperature sensor, the liquid level sensor, the water draining mechanism 29, and the electric heating mechanism 20 are all electrically connected to the drive circuit 10.

[0046] The provided supporting rollers can effectively carry and guide the textiles passing through the bearing tank, improving the smoothness and stability of textile transportation. At the same time, the provided lifting mechanism and pressing rollers cooperate. On the one hand, the textiles passing through the bearing tank are pressed into the glue liquid in the bearing tank for soaking; on the other hand, the tension during textile transportation is adjusted.

[0047] After soaking, the water draining mechanism finally cleans the excess glue liquid from the textiles and dries the textiles, thus facilitating subsequent winding and storage operations. At the same time, the cleaned glue liquid flows back into the bearing tank for recycling.

[0048] It should be specifically noted that the water draining mechanism 29 includes a slider 204, a bracket 291, a flipping mechanism 9, a water draining roller 293, a hot air blower 292, a pressure sensor 26, and a temperature and humidity sensor 8. The bracket 291 has a trough-shaped structure with a "U"-shaped cross-section. Its outer side is hinged to the slider 204 through the flipping mechanism 9 and is connected to the lifting drive mechanism 24 through the slider 204. The bottom of the bracket 291 forms an angle of 0° - 45° with the horizontal plane. There are several water draining rollers 293, and every two water draining rollers 293 form a working group. Each working group is located inside the bracket 291 and is distributed along the axis direction of the bracket 291. Both ends of the water draining roller 293 are hinged to the inner side of the bracket 291 through a swinging mechanism 4. The axes of the water draining rollers 293 are perpendicularly distributed to the axis of the bearing groove 21. At the same time, the two water draining rollers 293 in the same working group are distributed vertically, and the distance between the two water draining rollers 293 is 0 - 10 millimeters. There is at least one hot air blower 292, which is located before two adjacent working groups. The hot air blower 292 is hinged to the inner side of the bracket 291 through the swinging mechanism 4, is located above the midline of the working group, and the axis of the hot air blower 292 forms an angle of 10° - 90° with the bottom of the bracket 291. There are several pressure sensors 26 and temperature and humidity sensors 8. At least two pressure sensors 26 and temperature and humidity sensors 8 are arranged inside the roller surface of each water draining roller 293, and the pressure sensors 26 and temperature and humidity sensors 8 are evenly distributed around the axis of the water draining roller 293. The flipping mechanism 9, the hot air blower 292, the pressure sensor 26, and the temperature and humidity sensor 8 are all electrically connected to the drive circuit 10.

[0049] During operation, the angle between the bottom of the bracket and the horizontal plane can be adjusted through the flipping mechanism. On the one hand, it meets the need for guiding and transporting textiles; on the other hand, it can effectively improve the reflux efficiency of the drained glue.

[0050] During operation, the distance between the two water draining rollers in the same working group and the pressure between the two water draining rollers are adjusted through the swinging mechanism, so as to discharge the excess glue adsorbed in the textile through the pressure between the two water draining rollers, thereby achieving the purpose of draining the excess glue through continuous operation of multiple working groups. At the same time, while draining the excess glue through physical extrusion, the textile is dried by the hot air blower.

[0051] In this embodiment, the drive circuit 10 is a circuit system based on a programmable controller. At the same time, the drive circuit is additionally provided with a communication gateway and establishes a data connection with an external communication network through the communication gateway.

[0052] The present invention has good structural strength and can flexibly adjust the decorative pattern of the non-woven fabric according to the usage requirements. Meanwhile, during operation, it has good degradability, meeting the environmental protection requirements. Additionally, it can achieve controllable and orderly degradation of the non-woven fabric structure during the degradation process, effectively extending the service life and stability of the non-woven fabric. Moreover, it can give a prompt to the user during the degradation process, overcoming the inconvenience caused to the user by the overall failure of the traditional non-woven fabric during disordered degradation. At the same time, it also prevents a large amount of fiber debris from being generated due to the disordered degradation of the non-woven fabric, which may pollute the surrounding environment and increase the cleaning difficulty.

[0053] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention. These changes and improvements fall within the scope of the claimed present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spunlace nonwoven fabric of a degradable material, characterized in that: The spunlace nonwoven fabric of the degradable material comprises a connecting degradable fiber, a bearing degradable fiber, and a decorative degradable fiber, wherein the bearing degradable fiber constitutes a plurality of sandwich bearing layers with rectangular cross sections, and each sandwich bearing layer is distributed in the same layer, and two adjacent sandwich bearing layers are connected to each other through a plurality of connecting degradable fibers, and the spacing between two adjacent sandwich bearing layers is 0.5-2 mm, and each sandwich bearing layer is connected to each other to form a core layer, and the decorative degradable fiber constitutes a degradable decorative layer, and the degradable decorative layer is respectively coated on the upper surface and the lower surface of the core layer, and the core layer and the degradable decorative layer connected to the upper surface and the lower surface are connected through a plurality of connecting degradable fibers; By setting the difference in degradation speed between the contacting degradable fibers, the bearing degradable fibers and the decorative degradable fibers, among which the contacting degradable fibers have the shortest degradation time, and making them degrade and fail first, the non-woven textile is first made to maintain the overall structural stability while partially reducing the structural strength of the non-woven fabric, thereby providing the user with a prompt of the degradation status of the non-woven fabric, and after the contacting degradable fibers are degraded, the degradable decorative layer and the core layer are separated, which not only satisfies the degradation failure of the non-woven fabric, but also prevents the simultaneous generation of a large amount of fiber debris; at the same time, the bearing degradable fibers take longer to degrade than the decorative degradable fibers, so that when the decorative layer structure of the non-woven fabric fails first, the sandwich bearing layer remains structurally intact, so that the non-woven fabric achieves the purpose of gradual failure and degradation.

2. The spunlace nonwoven fabric of a degradable material according to claim 1, characterized in that: The sandwich bearing layer is a mesh structure with a pore size of 0.5-1.5, and the mesh holes are parallelogram-shaped. The thickness of the sandwich bearing layer is 0.8-1.5 times the total thickness of the two degradable decorative layers on its surface.

3. The spunlace nonwoven fabric of a degradable material according to claim 1, characterized in that: The degradable decorative layer and the core layer are connected by degradable adhesive, and the degradable adhesive penetrates into the degradable decorative layer and the core layer respectively. In addition, a fiber protective agent is arranged on the surface of the degradable decorative layer.

4. The process for preparing a spunlace nonwoven fabric of a degradable material according to claim 1, characterized in that: The preparation process of the spunlace nonwoven fabric of the degradable material comprises the following steps: S1, fabric processing, using textile equipment to process and manufacture the sandwich load-bearing layer and the degradable decorative layer respectively, and independently rolling up and storing the manufactured sandwich load-bearing layer and the degradable decorative layer respectively, and at the same time, secondary spinning is performed between the prepared sandwich load-bearing layers through the contacting degradable fiber to prepare the core layer, and the core layer is rolled up and stored; S2, slurry preparation, first dilute the degradable glue into a glue solution with a concentration of no more than 50% through a slurry mixing device, then add the fiber protective agent into the glue solution and mix it thoroughly with the glue solution to obtain a protective liquid, and the amount of the fiber protective agent is 30%-70% of the amount of the degradable glue, and after stirring evenly, store it at a constant temperature of 25℃-40℃; S3, secondary textile processing, the core layer and the degradable decorative layer prepared in step S1 are subjected to secondary textile processing through contacting degradable fibers to obtain a non-woven fabric substrate, and the prepared non-woven fabric substrate is transported to the slurry mixing equipment in step S2 through a conveying device, so that the non-woven fabric substrate is soaked in a protective liquid through the slurry mixing equipment, and then the soaked non-woven fabric substrate is dried. After drying, a finished non-woven fabric can be obtained, and the finished non-woven fabric can be rolled up, dried and stored.

5. The process for preparing a spunlace nonwoven fabric of a degradable material according to claim 4, characterized in that: The mixing device in step S2 includes a supporting frame, a liquid storage tank, a guide roller, a swing mechanism, a connecting arm, an inclination sensor, a torque sensor, a temperature and humidity sensor, a flip mechanism and a driving circuit. The supporting frame is a frame structure with a rectangular cross section. The liquid storage tank is embedded in the supporting frame, and its axis is at an angle of 0°-30° with the horizontal plane. There are two guide rollers, which are located outside the front end and rear end surfaces of the liquid storage tank, and their axes are perpendicular to the axis of the liquid storage tank. The guide roller is connected to the supporting frame through a connecting arm, and the rear end surface of the connecting arm is connected to the supporting frame through a swing mechanism. The connecting arm is hinged, the axis of the connecting arm forms an angle of 10°-60° with the bottom of the liquid storage tank, and the axes of the guide rollers are all located above the upper end surface of the liquid storage tank. At the same time, an inclination sensor is provided on the outer side of the connecting arm, and a torque sensor is provided at the flipping mechanism. The temperature and humidity sensors are embedded in the roller surface of the guide roller, and each guide roller is provided with at least two temperature and humidity sensors, and the temperature and humidity sensors are evenly distributed around the axis of the guide roller. The driving circuit is connected to the outer side of the supporting frame, and is electrically connected to the liquid storage tank, the swing mechanism, the inclination sensor, the torque sensor, and the temperature and humidity sensor respectively.

6. The process for preparing a spunlace nonwoven fabric of a degradable material according to claim 5, characterized in that: The described liquid storage tank includes a carrying tank, a sealing cover, idler rollers, a lifting drive mechanism, pressing rollers, pressure sensors, temperature sensors, a liquid level sensor, a water draining mechanism, and an electric heating mechanism. The carrying tank has a trough-shaped structure with an inverted isosceles trapezoid cross-section. Its upper end surface is connected to the sealing cover to form a closed cavity structure. A guiding hole is provided on each of the front end surface and the rear end surface of the carrying tank. The two guiding holes are coaxially distributed and arranged along the axis direction of the carrying tank. A feeding port and an exhaust port are provided on the sealing cover. There are two idler rollers in total, which are located inside the carrying tank and are respectively connected to the front end surface and the rear end surface of the carrying tank. The idler rollers are located below the guiding holes and their roller surfaces are flush with the axis of the guiding holes. There are at least two pressing rollers and one water draining mechanism. The pressing rollers and the water draining mechanism are both located inside the carrying tank and are arranged along the axis direction of the carrying tank. The water draining mechanism is located between the pressing rollers and the idler roller at the rear end surface of the carrying tank. The pressing rollers are parallel to the idler rollers. Both ends of the pressing rollers and the water draining mechanism are slidably connected to the side wall of the carrying tank through the lifting drive mechanism. The pressing rollers are connected to the lifting drive mechanism through sliders, and a pressure sensor is additionally provided at the connection position between the slider and the pressing roller. The liquid level sensor and the temperature sensor are both located inside the carrying tank. There are several temperature sensors, which are all connected to the lower end surface of the sealing cover and are arranged along the axis direction of the carrying tank. The liquid level sensor is connected to the side wall of the carrying tank. The electric heating mechanism is embedded in the bottom of the carrying tank and is arranged along the axis direction of the carrying tank. The lifting drive mechanism, the pressure sensors, the temperature sensors, the liquid level sensor, the water draining mechanism, and the electric heating mechanism are all electrically connected to the drive circuit.

7. The process for preparing a spunlace nonwoven fabric of a degradable material according to claim 6, characterized in that: The described water draining mechanism includes sliders, brackets, a flipping mechanism, water draining rollers, hot air blowers, pressure sensors, and temperature and humidity sensors. The bracket has a trough-shaped structure with a "凵" - shaped cross-section. Its outer side is hinged to the slider through the flipping mechanism in the water draining mechanism and is connected to the lifting drive mechanism through the slider. The bottom of the bracket forms an angle of 0° - 45° with the horizontal plane. There are several water draining rollers, and every two water draining rollers form a working group. Each working group is located inside the bracket and is arranged along the axis direction of the bracket. Both ends of the water draining rollers are hinged to the inner side surface of the bracket through a swinging mechanism. The axes of the water draining rollers are perpendicularly distributed to the axis of the carrying tank. At the same time, the two water draining rollers in the same working group are arranged vertically, and the distance between the two water draining rollers is 0 - 10 millimeters. There is at least one hot air blower, which is located in front of two adjacent working groups. The hot air blower is hinged to the inner side surface of the bracket through a swinging mechanism, is located above the midline of the working group, and the axis of the hot air blower forms an angle of 10° - 90° with the bottom of the bracket. There are several pressure sensors and temperature and humidity sensors. At least two pressure sensors and temperature and humidity sensors are provided inside the roller surface of each water draining roller, and the pressure sensors and temperature and humidity sensors are evenly distributed around the axis of the water draining roller. The flipping mechanism, the hot air blower, the pressure sensors, and the temperature and humidity sensors in the water draining mechanism are all electrically connected to the drive circuit.

8. The process for preparing a spunlace nonwoven fabric of a degradable material according to claim 7, characterized in that: The described drive circuit is a circuit system based on a programmable controller. At the same time, a communication gateway is additionally provided in the drive circuit, and a data connection is established with an external communication network through the communication gateway.

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