Preparation method of non-woven fabric

Abstract

The invention discloses a preparation method of a non-woven fabric. The non-woven fabric is formed by reinforcing a double-layer fiber net; the upper-layer fiber net is formed by uniformly mixing and carding first fine denier fibers and second fine denier fibers which are different in thickness; the first fine denier fibers are ES (Ethylene-Propylene Styrene) fibers with the density of 0.6 to 1.0 D The surface of the first fine denier fiber is subjected to first-time hydrophobic zinc oxide evaporation / magnetron sputtering treatment, so that a first layer of zinc oxide is formed on the surface of the first fine denier fiber, and the particle size of the zinc oxide is 10-100 nm; second-time hydrophobic zinc oxide evaporation / magnetron sputtering treatment is conducted on the surface of the first fine denier fiber, so that a second layer of zinc oxide is formed on the surface of the first layer of zinc oxide, and the particle size of zinc oxide is 2-30 nm; constructing a zinc oxide structure of which the surface is slightly convex on the surface of the first fine denier fiber; the super-hydrophobicity of the fiber surface is realized. According to the ES fiber disclosed by the invention, a surface micro-bulge structure is constructed through double-layer ZnO, so that the super-hydrophobic and antibacterial effects of the fiber surface are realized.

Description

Technical Field

[0001] The invention discloses a method for preparing nonwoven fabric. Background Art

[0002] With the upgrading of existing consumption concepts and the improvement of quality of life, modern consumers' pursuit of sanitary products has gradually improved. They not only require basic performance, but also pay attention to the function and comfort of products. There are many kinds of existing sanitary products, and their structures vary according to the functional performance of the products, such as absorption time, absorption amount, antibacterial, skin care, and dilution of surface liquid color. In particular, for sanitary napkins used during menstruation, menstrual blood is a mixed liquid of blood and some shed endometrium, cervical mucus and vaginal secretions. The color of menstrual blood is dark, slightly sticky, and it is not easy to coagulate into blood clots. If you look closely, there will be small and thin fragments. Sometimes blood clots or black blood appear. The sanitary products currently on the market are to pass liquid excrement through the surface non-woven fabric, and then the absorption layer absorbs and stores liquid. However, for liquids with high viscosity and easy to agglomerate, such as menstrual blood, the menstrual fluid has poor liquid permeability and is easy to remain on the surface of the sanitary napkin, making the recipient feel sticky and uncomfortable and visually uncomfortable. At the same time, due to problems such as slow absorption and surface moisture, allergies and other phenomena occur, which greatly reduces the comfort of consumers. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the object of the present invention is to provide a novel method for preparing nonwoven fabrics.

[0004] To achieve the above object, the preparation method of the nonwoven fabric of the present invention is that the nonwoven fabric is reinforced by a double-layer fiber web; the upper fiber web is composed of two kinds of first fine denier fibers and second fine denier fibers of different thicknesses, which are evenly mixed and combed, and the ratio of the two is (1 to 5:1); wherein

[0005] The first fine denier fiber is ES fiber of 0.6-1.0D;

[0006] The surface of the first fine-denier fiber is subjected to a first hydrophobic zinc oxide evaporation / magnetron sputtering treatment to form a first layer of zinc oxide on the surface of the first fine-denier fiber, wherein the particle size of the zinc oxide is 10 to 100 nm;

[0007] The surface of the first fine-denier fiber is subjected to a second hydrophobic zinc oxide evaporation / magnetron sputtering treatment to form a second zinc oxide layer on the surface of the first zinc oxide layer, wherein the particle size of the zinc oxide is 2 to 30 nm;

[0008] A zinc oxide structure with micro-convexities is constructed on the surface of the first fine-denier fiber to achieve super-hydrophobicity on the fiber surface.

[0009] To achieve the above object, the preparation method of the nonwoven fabric of the present invention is that the nonwoven fabric is reinforced by a double-layer fiber web; the upper fiber web is composed of two kinds of first fine denier fibers and second fine denier fibers of different thicknesses, which are evenly mixed and combed, and the ratio of the two is (1 to 5:1); wherein,

[0010] A ZnO layer is formed on the surface of the first fine denier fiber using a ZnO latex particle size of 10 to 100 nm;

[0011] Zinc acetate solution is used to grow in situ on the ZnO seed layer to change the growth of ZnO from flower shape to rod shape and increase the roughness. The obtained fiber is dried and has a contact angle greater than 150°, so as to achieve super-hydrophobicity on the fiber surface.

[0012] Furthermore, the second fine denier fiber is 1.0-1.5D ES fiber containing hydrophilic silica, and the fiber contact angle is 80-90°;

[0013] Treating the second fine denier fiber with a weak monophilic oil agent to make the fiber contact angle be 70-80° to achieve liquid penetration;

[0014] After being wetted by liquid, the monophilic oil agent leaves the fiber and is carried into the absorbent core together with the liquid. At this time, the fiber contact angle is 80-90°, which can reduce the reverse osmosis of the liquid. At the same time, after the fiber is wetted, a capillary action channel is established with the lower fiber web, which can ensure the smooth infiltration of subsequent liquid.

[0015] Furthermore, the lower fiber web is composed of moisture-absorbing fibers and ES fibers;

[0016] Wherein, the moisture-absorbing fiber is plant fiber or regenerated cellulose fiber;

[0017] The mass of the hygroscopic fiber added to the lower fiber web is 0.5-5%; the hygroscopic fiber can absorb the moisture stored in the fiber gaps in the upper fiber web, so as to make the upper fiber web dry;

[0018] The lower ES fiber web is composed of multiple strong hydrophilic fibers, which can also transfer excess liquid absorbed by the hygroscopic fibers.

[0019] Furthermore, the method further comprises the step of performing post-finishing treatment on the nonwoven fabric:

[0020] Add skin care lotion to nonwoven fabrics using a roller coating process;

[0021] Furthermore, the skin care lotion comprises the following raw materials in mass fractions: 0.5 to 5 parts of guaiacyl, 0.5 to 5 parts of ceramide, 0 to 20 parts of octadecyl alcohol, 0 to 20 parts of palmitic alcohol, 10 to 25 parts of vaseline, 0.5 to 5 parts of water, and 0.1 to 2 parts of pH buffer system.

[0022] Furthermore, in the roller coating process, a polygonal or circular closed pattern is provided on the roller, so that the skin care lotion is formed on the nonwoven fabric in the form of a closed pattern.

[0023] Furthermore, the skin care lotion is prepared according to the following steps:

[0024] 0.5-5 parts of guaiazulene, 0-20 parts of octadecyl alcohol, 0-20 parts of palmitic alcohol, 10-25 parts of vaseline, 0.5-5 parts of water and 0.5-5 parts of a surfactant are mixed and stirred for 1-2 hours to prepare an oil phase solution;

[0025] By using the dropping method, 0.5 to 5 parts of ceramide are added dropwise to the oil phase solution, and homogenized with a high-speed dispersing homogenizer while dropping. After homogenizing for a period of time, a pH buffer system is added dropwise to adjust the pH of the emulsion to 4.5 to 6.5 to obtain an emulsion.

[0026] Furthermore, the fibers of the upper fiber web are less than 15um, and the fibers of the lower fiber web are less than 25um; and on the lower surface of the upper fiber web and / or the lower fiber web, there are arranged 5 to 500 pieces / cm2 of 0.001-0.1mm in diameter. 2 of glue drops.

[0027] Furthermore, the glue droplets are formed by the following method:

[0028] Using a rotating disk spray device, spraying the light-curing glue on the upper fiber web and / or the lower surface of the lower fiber web to form glue droplets;

[0029] The glue droplets are cured by using a light-curing device; during the curing process, air is blown downward from the top of the nonwoven fabric to make the glue droplets protrude downward;

[0030] Using a camera to photograph the surface of the cured nonwoven fabric to obtain an image;

[0031] Pre-process the image to accurately identify and measure the glue drop size;

[0032] Extract the number and diameter of glue droplets from the processed image;

[0033] Collect data on the viscosity of the light-curing adhesive, environmental conditions, nonwoven surface characteristics, and turntable speed to determine their effects on the number and diameter of adhesive droplets;

[0034] determining an initial training data set based on the influence;

[0035] Preprocessing the initial training data set to obtain a model training data set, wherein the model training data set includes a training data set and a test data set;

[0036] Build an initial prediction model based on the long short-term memory network LSTM;

[0037] The initial prediction model is trained and verified using the above training data set and test data set;

[0038] The validated prediction model is used to precisely adjust the speed of the servo motor in the rotary disk spray equipment to control the number and diameter of the glue droplets.

[0039] The upper fine denier ES fiber in the present invention is mixed with a single hydrophilic fiber, wherein the ES fiber is constructed with a double-layer ZnO surface micro-convex structure, the size of the particle is controlled to increase the roughness and the contact area with the blood, and the interface between the liquid and the air is expanded through the micro-pits (with air inside), and the blood obtains a certain surface energy, so that the fiber surface is super-hydrophobic and self-cleaning. At the same time, the sodium zinc oxide has an antibacterial effect; the single hydrophilic fiber contains hydrophilic SiO2 and is treated with a single hydrophilic oil agent. After the liquid is infiltrated, a capillary action channel with the lower fiber net is established, which can ensure the smooth infiltration of the subsequent liquid. The lower layer is mixed with hygroscopic fibers and multiple hydrophilic fibers. The hygroscopic fibers are used to absorb the moisture stored in the fiber gaps in the upper fiber net to achieve the upper fiber net dryness, and the multiple strong hydrophilic fibers transfer the excess liquid absorbed by the hygroscopic fibers. At the same time, the non-woven fabric is post-finished, and the W / O emulsion system and the closed pattern are used to block the capillary action, effectively prevent the reverse osmosis of the liquid, and increase the skin care function to reduce the allergic phenomenon. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below.

[0041] The nonwoven fabric of the present invention is reinforced by a double-layer fiber net; the upper fiber net is composed of fine denier fibers (0.6-1.0D) and 1.0-1.5D fibers, which are evenly mixed and combed, and the ratio of the two is (1-5:1); the lower fiber net is composed of moisture-absorbing fibers and ES fibers;

[0042] First, the upper fine denier fiber (0.6-1.0D) is treated with super hydrophobic treatment:

[0043] Fine denier fiber (0.6-1.0D) is ES fiber, and the fiber surface is treated twice by hydrophobic zinc oxide evaporation / magnetron sputtering. The particle size of the first zinc oxide layer is 10-100nm; the particle size of the second layer is 2-30nm. By controlling the difference in the particle size of zinc oxide during the treatment process, the roughness is increased, and a micro-convex structure (lotus effect) is constructed on the fine denier fiber surface to achieve super hydrophobicity on the fiber surface. At the same time, nano zinc oxide has an antibacterial effect. The blood only contacts the micro-convex part, reducing the contact area of ​​the surface layer. The interface between the liquid and the air is expanded through the micro-pits (with air inside). The blood obtains a certain surface energy and will not expand, playing a self-cleaning role.

[0044] or

[0045] Using the hydrothermal method, the fine denier fiber is first placed in a ZnO emulsion (particle size 10-100nm) to generate ZnO, and then it is passed through a zinc acetate solution (small particle size) to promote the in-situ growth of ZnO (small particle size) on the ZnO seed layer (large particle size), so as to promote the growth of ZnO from flower shape to rod shape and increase the roughness. The resulting fiber is dried, the contact angle is greater than 150°, and it is super hydrophobic.

[0046] 1.0-1.5D fiber: Hydrophilic nano-silica (0.5-15%) is added to the PE masterbatch to prepare ES fiber containing hydrophilic silica, with a fiber contact angle of 80-90°, and the fiber is treated with a weak monophilic oil agent, with a contact angle of 70-80° to achieve liquid infiltration.

[0047] After being wetted by the liquid, the monophilic oil agent leaves the fiber and is carried into the absorbent core together with the liquid. At this time, the fiber contact angle is 80-90°, which can reduce the reverse osmosis of the liquid. At the same time, after the fiber is wetted, a capillary action channel is established with the lower fiber network, which can ensure the smooth infiltration of the subsequent liquid.

[0048] Secondly, in the lower fiber web, the hygroscopic fiber is plant fiber or regenerated cellulose fiber, preferably cotton fiber or viscose fiber or lyocell fiber. The hygroscopic fiber is added in an amount (0.5-5%) in the lower fiber web, and the hygroscopic fiber can absorb the moisture stored in the fiber gaps in the upper fiber web to achieve a dry upper fiber web.

[0049] The lower fiber web ES is composed of multiple layers of strongly hydrophilic fibers, and can also transfer excess liquid absorbed by the hygroscopic fibers.

[0050] The nonwoven fabric is further subjected to post-finishing treatment, and skin care ingredients are added by roller coating process, so that the nonwoven fabric has the functions of dryness, skin care, softness, etc., and reduces allergies.

[0051] The above-mentioned skin care lotion comprises the following raw materials in mass fractions: 0.5-5 parts of guaiazulene, 0.5-5 parts of ceramide, 0-20 parts of octadecyl alcohol, 0-20 parts of palmitic alcohol, 10-25 parts of vaseline, 0.5-5 parts of water, and 0.1-2 parts of pH buffer system;

[0052] The skin care component emulsion is prepared according to the following steps: 0.5-5 parts of guaiazulene, 0-20 parts of octadecyl alcohol, 0-20 parts of palmitic alcohol, 10-25 parts of vaseline, 0.5-5 parts of water and a certain amount of surfactant are mixed and stirred for 1-2 hours to prepare an oil phase solution. 0.5-5 parts of ceramide are added dropwise to the oil phase solution by a dropwise addition method, and a high-speed dispersing homogenizer is used to homogenize the solution while adding the ceramide dropwise. After homogenizing for a period of time, a pH buffer system is added dropwise to adjust the pH of the emulsion to 4.5-6.5 to prepare the emulsion.

[0053] The pH buffer system has a high molecular weight (molecular weight>1000) to prevent penetration of the skin, and uses the buffering capacity to adjust the pH of the emulsion to 4.5-6.5. Further, it is a compound system of polyglutamic acid / polyglutamic acid salt and polyleucine / polyleucine salt.

[0054] Furthermore, the pattern of the embossing roller in the above-mentioned roller coating process is a closed pattern, such as a quadrilateral, pentagon, hexagon or a closed irregular pattern. The closed pattern is used to lock the liquid and block the capillary action. When used, the pressure promotes the infiltration of the liquid in a direction, thereby achieving skin care, small surface diffusion, low rewetting, etc.

[0055] Furthermore, the friction migration amount of the skin care ingredients is ≤ 60%, and further 30 to 60%.

[0056] In the above scheme, the upper fine denier ES fiber is mixed with a single hydrophilic fiber, wherein the ES fiber constructs a surface micro-convex structure through a double layer of ZnO, controls the size of the particles to increase the roughness and the contact area with the blood, expands the interface between the liquid and the air through the micro-pits (with air inside), and the blood obtains a certain surface energy, realizing the super-hydrophobicity and self-cleaning effect of the fiber surface, and the sodium zinc oxide has an antibacterial effect; the single hydrophilic fiber contains hydrophilic SiO2 and is treated with a single hydrophilic oil agent. After the liquid is infiltrated, a capillary action channel with the lower fiber net is established to ensure the smooth infiltration of the subsequent liquid. The lower layer is a mixture of hygroscopic fibers and multiple hydrophilic fibers. The hygroscopic fibers are used to absorb the moisture stored in the fiber gaps in the upper fiber net to achieve the dryness of the upper fiber net, and the multi-strong hydrophilic fibers transfer the excess liquid absorbed by the hygroscopic fibers. At the same time, the non-woven fabric is post-finished, and the W / O emulsion system and the closed pattern are used to block the capillary action, effectively prevent the reverse osmosis of the liquid, and increase the skin care function to reduce allergies.

[0057] Experimental data

[0058] According to "GB / T 24218.13-2010 Test methods for textile nonwovens Part 13: Determination of multiple liquid penetration time", "GB / T 24218.14-2010 Test methods for textile nonwovens Part 14: Determination of the rewet content of coated materials" and "T / CTAPI002-2022 Craftsmanship Products Household Paper", nonwoven fabrics are tested to characterize their liquid penetration time, rewet content and softness.

[0059] 1. Use 2.5D ES fiber as the lower fiber web to verify the effect of different upper fiber layers on the performance of nonwoven fabrics

[0060]

[0061] Note: TSA tests softness, where TS7 represents the true softness, which is mainly affected by the fiber. The smaller the peak value, the better the softness.

[0062] The finer the fibers of the upper fiber web, the smaller the TS7, the better the real softness, but the liquid penetration time and rewet amount are poor. By adopting a suitable combination of fiber fineness, the softness and absorption performance of the nonwoven fabric can be taken into account.

[0063] After 0.8D fiber is treated with ZnO supercomb water, water does not adhere to its surface, thereby significantly reducing the amount of rewetting.

[0064] By combining the hydrophilic nano-silica and monophilic oil treatment of the 1.2D fiber, the permanent weak hydrophilicity of the 1.2D surface is achieved. At the same time, the initial hydrophilic effect of the monophilic oil is utilized to achieve smooth infiltration of the liquid. At this time, after the fiber is wetted, a capillary action channel is established with the underlying fiber web, which can ensure the smooth infiltration of subsequent liquids and reduce the amount of rewetting.

[0065] 2. The upper fiber web is treated with 80% 0.8D ZnO + 20% 1.2D hydrophilic nano-silica and single oleophilic agent to verify the effect of different lower fiber layers on the performance of nonwoven fabrics

[0066]

[0067]

[0068] Adding viscose fiber to the lower fiber web helps the liquid to penetrate quickly. At the same time, when the amount added is small, it can absorb the moisture stored in the fiber gaps in the upper fiber web and transfer it to the absorbent core through the lower ES fiber, thereby reducing the amount of rewetting. However, if the amount added is too much, the liquid will be stored in the hygroscopic fiber and cannot be effectively transferred, resulting in a high amount of rewetting.

[0069] Nonwoven finishing

[0070] Nonwoven fabrics with different coating patterns were made into baby diapers, and the permeability performance was tested according to GB / T 28004.1-2021.

[0071]

[0072] After the nonwoven fabric surface is coated with emulsion, the absorption speed slows down and the rewet amount decreases. This is because after coating, the absorption area is small, resulting in a slower absorption speed, but at the same time, there is a water-repellent area and the rewet amount also decreases.

[0073] Compared with a non-closed pattern, a closed pattern can completely block the capillary action, thereby reducing the diffusion on the surface and significantly reducing the amount of rewet.

[0074] Although closed pattern coating will affect the absorption speed, it is still much faster than the national standard requirements and there is no risk of urine leakage.

[0075] In order to achieve good skin care effects, it is hoped that more skin care ingredients will migrate to the skin surface. However, if they migrate to the skin surface, there is also a risk of migrating downwards, which will affect the performance of sanitary products.

[0076] Coating agent migration test method:

[0077] Weigh the weight of the plexiglass panel and record it as M1, and lay the nonwoven fabric coated with the emulsion (the mass of the emulsion coating is M0) flat on the plexiglass panel;

[0078] A 5 kg briquette of 60 mm*100 mm in size was placed on the nonwoven fabric, with the non-emulsion coated surface in contact with the briquette;

[0079] Pull the nonwoven fabric back and forth at a constant speed for 3 times at a speed of 500 mm / min, with a pulling range of 100 mm

[0080] Remove the pressing block and nonwoven fabric, and weigh the plexiglass plate M2.

[0081] Calculate the migration amount M% = (M2-M1) / M0*100%

[0082] By changing the hardness of the skin care system, the migration amount of the system can be adjusted. The nonwoven fabric is made into diapers, and the absorption speed and re-permeability are tested according to GB / T28004.1-2021 Baby Diapers

[0083] Migration amount First absorption speed / s Second absorption rate / s Re-seepage amount / g 20％ 10 17 2.5 30％ 10 19 1.8 40％ 12 25 1.3 50％ 14 28 1.2 60％ 18 32 1.9 70％ 38 67 6.7 80％ 67 98 7.2

[0084] As a further improvement of the present invention, the lower surface of the upper fiber web and / or the lower fiber web is provided with 5-500 pieces / cm2 of diameter of 0.001-0.1 mm 2 The glue droplets are light-curing glue; light-curing glue, also known as UV glue or shadowless glue, is an adhesive that must be cured by ultraviolet light.

[0085] The preparation process comprises the following steps:

[0086] The light-curing glue is applied to the lower surface of the upper fiber web and the lower fiber web by spraying, roller coating or the like;

[0087] The glue droplets are cured by using a light curing device. Preferably, during the light curing process, air is blown upward from the nonwoven fabric to make the glue droplets form a spindle structure.

[0088] Under the condition of blowing, most of the light-cured glue will drip and adhere to the fiber entanglement. After curing, glue droplets will be formed at the fiber entanglement. When the liquid contacts the glue droplets, the Laplace pressure gradient difference caused by the curvature change can accelerate the infiltration of the liquid.

[0089] The present invention is described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Many other changes and modifications that do not depart from the concept and scope of the present invention should be regarded as the protection scope of the present invention.

[0090] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0091] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preparing a nonwoven fabric, characterized in that: The nonwoven fabric is reinforced by a double-layer fiber web; the upper fiber web is composed of two types of first fine denier fibers and second fine denier fibers of different thicknesses, which are evenly mixed and combed; wherein, The first fine denier fiber is ES fiber of 0.6-1.0D; The surface of the first fine-denier fiber is subjected to a first hydrophobic zinc oxide evaporation / magnetron sputtering treatment to form a first layer of zinc oxide on the surface of the first fine-denier fiber, wherein the particle size of the zinc oxide is 10 to 100 nm; The surface of the first fine-denier fiber is subjected to a second hydrophobic zinc oxide evaporation / magnetron sputtering treatment to form a second zinc oxide layer on the surface of the first zinc oxide layer, wherein the particle size of the zinc oxide is 2 to 30 nm; A zinc oxide structure with micro-convexities is constructed on the surface of the first fine-denier fiber to achieve super-hydrophobicity on the fiber surface.

2. A method for preparing a nonwoven fabric, characterized in that: The nonwoven fabric is reinforced by a double-layer fiber web; the upper fiber web is composed of two first fine denier fibers and second fine denier fibers of different thicknesses, which are evenly mixed and combed; wherein, A ZnO layer is formed on the surface of the first fine denier fiber using a ZnO latex particle size of 10 to 100 nm; Zinc acetate solution is used to grow in situ on the ZnO seed layer to change the growth of ZnO from flower shape to rod shape and increase the roughness. The obtained fiber is dried and has a contact angle greater than 150°, so as to achieve super-hydrophobicity on the fiber surface.

3. The method for preparing a nonwoven fabric according to claim 1 or 2, characterized in that: The second fine denier fiber is 1.0-1.5D ES fiber containing hydrophilic silica, and the fiber contact angle is 80-90°; Treating the second fine denier fiber with a weak monophilic oil agent to make the fiber contact angle be 70-80° to achieve liquid penetration; After being wetted by liquid, the monophilic oil agent leaves the fiber and is carried into the absorbent core together with the liquid. At this time, the fiber contact angle is 80-90°, which can reduce the reverse osmosis of the liquid. At the same time, after the fiber is wetted, a capillary action channel is established with the lower fiber web, which can ensure the smooth infiltration of subsequent liquid.

4. The method for preparing a nonwoven fabric according to claim 1 or 2, characterized in that: The lower fiber web is composed of moisture-absorbing fibers and ES fibers; Wherein, the moisture-absorbing fiber is plant fiber or regenerated cellulose fiber; The mass of the hygroscopic fiber added to the lower fiber web is 0.5-5%; the hygroscopic fiber can absorb the moisture stored in the fiber gaps in the upper fiber web, so as to make the upper fiber web dry; The lower ES fiber web is composed of multiple strong hydrophilic fibers, which can also transfer excess liquid absorbed by the hygroscopic fibers.

5. The method for preparing a nonwoven fabric according to claim 1 or 2, characterized in that: It also includes the steps of finishing the nonwoven fabric: Skin care lotion is applied on nonwoven fabric using roller coating process.

6. The method for preparing a nonwoven fabric according to claim 5, wherein: The skin care lotion comprises the following raw materials in mass fractions: 0.5 to 5 parts of guaiacyl, 0.5 to 5 parts of ceramide, 0 to 20 parts of octadecyl alcohol, 0 to 20 parts of palmitic alcohol, 10 to 25 parts of vaseline, 0.5 to 5 parts of water, and 0.1 to 2 parts of pH buffer system.

7. The method for preparing a nonwoven fabric according to claim 5, wherein: In the roller coating process, a polygonal or circular closed pattern is provided on the roller, so that the skin care lotion is formed on the nonwoven fabric in the form of a closed pattern.

8. The method for preparing a nonwoven fabric according to claim 5, wherein: The skin care lotion is prepared according to the following steps: 0.5-5 parts of guaiazulene, 0-20 parts of octadecyl alcohol, 0-20 parts of palmitic alcohol, 10-25 parts of vaseline, 0.5-5 parts of water and 0.5-5 parts of a surfactant are mixed and stirred for 1-2 hours to prepare an oil phase solution; By using the dropping method, 0.5 to 5 parts of ceramide are added dropwise to the oil phase solution, and homogenized with a high-speed dispersing homogenizer while dropping. After homogenizing for a period of time, a pH buffer system is added dropwise to adjust the pH of the emulsion to 4.5 to 6.5 to obtain an emulsion.

9. The method for preparing a nonwoven fabric according to claim 3, wherein: The fibers of the upper fiber net are less than 15um, and the fibers of the lower fiber net are less than 25um; on the lower surface of the upper fiber net and / or the lower fiber net, there are 5 to 500 pieces / cm with a diameter of 0.001-0.1mm. 2 of glue drops.

10. The method for preparing a nonwoven fabric according to claim 3, wherein: The glue droplets are formed by the following method: Using a rotating disk spray device, spraying the light-curing glue on the upper fiber web and / or the lower surface of the lower fiber web to form glue droplets; Use light curing equipment to cure the glue droplets; During the curing process, air is blown downward from above the nonwoven fabric to make the glue droplets protrude downward; Using a camera to photograph the surface of the cured nonwoven fabric to obtain an image; Pre-process the image to accurately identify and measure the size of glue droplets; Extract the number and diameter of glue droplets from the processed image; Collect data on the viscosity of the light-curing adhesive, environmental conditions, nonwoven surface characteristics, and turntable speed to determine their effects on the number and diameter of adhesive droplets; determining an initial training data set based on the influence; Preprocessing the initial training data set to obtain a model training data set, wherein the model training data set includes a training data set and a test data set; Build an initial prediction model based on the long short-term memory network LSTM; The initial prediction model is trained and verified using the above training data set and test data set; The validated prediction model is used to precisely adjust the speed of the servo motor in the rotary disk spray equipment to control the number and diameter of the glue droplets.

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