Skin-friendly hygienic product based on flat fibers and preparation method of skin-friendly hygienic product

Abstract

The invention relates to the field of hygienic product preparation, in particular to a skin-friendly hygienic product based on flat fibers and a preparation method thereof.The skin-friendly hygienic product based on the flat fibers comprises an ES flat fiber surface layer, a flow guide layer, a moisture absorption layer and a bottom film; the ES flat fiber leather in the ES flat fiber surface layer comprises PE (polyethylene), PHA (polyhydroxyalkanoate), a compatibilizer, a carrier calcium carbide whisker and a carrier nano cellulose; the preparation method comprises the following steps: melting the core layer to obtain a melt; uniformly mixing PE (polyethylene), PHA (polyhydroxyalkanoate) and a compatibilizer, uniformly mixing a loading material calcium carbide whisker and a loading material nano cellulose, and melting to obtain a mixed melting material; after the melt and the mixed melt are mixed, ES flat fibers are obtained through spinning, bundling, stretching, heat setting, curling and cutting; the ES fibers are woven into the ES flat fiber surface layer, then the diversion layer, the moisture absorption layer and the bottom film are bonded in sequence by spraying a glue solution, and a finished product is prepared after the glue solution is dried and cured. The fabric has the advantages of good skin-friendly performance, high softness, high tensile strength and good hygroscopicity.

Description

Technical Field

[0001] The present application relates to the field of preparation of sanitary products, and more specifically, to a skin-friendly sanitary product based on flat fibers and a preparation method thereof. Background Art

[0002] Sanitary products generally include sanitary napkins, pantiliners, diapers, diaper pads (papers), urine isolation pads, etc. for infants, the elderly, etc., and need to have good air permeability and hygroscopicity.

[0003] The structure of a diaper mainly includes parts such as a surface layer, a diversion layer, an absorption core, a bottom film, etc. Since infants and young children are active, the surface layer of the diaper needs to have good tensile strength to avoid the diaper being broken and exposing substances such as fibers and resins in the diversion layer as much as possible. And since the skin of infants and young children is delicate, the surface layer needs to have high softness and skin-friendliness to reduce skin friction and irritation and protect the skin of infants and young children from being scratched by friction.

[0004] Therefore, how to prepare a sanitary product with good skin-friendliness, high softness, high tensile strength and good hygroscopicity is a problem to be solved. Summary of the Invention

[0005] In order to prepare a sanitary product with good skin-friendliness, high softness, high tensile strength and good hygroscopicity, the present application provides a skin-friendly sanitary product based on flat fibers and a preparation method thereof.

[0006] In a first aspect, the present application provides a skin-friendly sanitary product based on flat fibers, adopting the following technical solution: A skin-friendly sanitary product based on flat fibers includes an ES flat fiber surface layer, a diversion layer, a moisture absorption layer and a bottom film; The skin material of the ES flat fiber in the ES flat fiber surface layer is made of the following raw materials in parts by weight: 80 - 100 parts of PE, 20 - 30 parts of PHA, 1 - 3 parts of compatibilizer, 1 - 4 parts of carrier calcium carbide whiskers, 1 - 3 parts of carrier nanocellulose; The core material of the ES flat fiber is a PET core material.

[0007] By adopting the above technical solution, the diaper prepared by the cooperation of the ES flat fiber surface layer, the diversion layer, the moisture absorption layer and the bottom film has good skin-friendly softness, and is not prone to problems such as allergy and skin friction; and has good moisture absorption effect, and at the same time has good tensile strength. After an infant wears the diaper, the diaper is not prone to problems such as rupture and side leakage during the movement of the infant.

[0008] The double-layer structure of the ES flat fiber can improve the absorption and diversion effect of the diaper surface layer on moisture, so as to quickly absorb liquid and is not prone to side leakage problems. And PET has good toughness, which improves the structural stability and strength of the surface layer.

[0009] During the preparation of ES flat fibers, by utilizing the good flexibility and durability of PE fibers, the flexibility of ES flat fibers is improved, and problems such as breakage and damage after movement and tearing are not likely to occur. In combination with the good biocompatibility of PHA, it can balance the skin affinity of PE fibers, reduce the impact of the surface layer prepared from ES flat fibers on the skin of infants, and improve the skin-friendly degree of the diaper surface layer to the skin of infants; in combination with a compatibilizer, the compatibilization and bonding effect among PE, PHA, and fibers is improved, and the structural density of ES flat fibers is increased, thereby improving the tensile strength, flexibility, and durability of ES flat fibers.

[0010] The carrier calcium carbide whiskers and the carrier nanocellulose are combined. By utilizing the tensile strength of calcium carbide whiskers and the good softness of cellulose fibers and adding them to PE, the tensile strength and skin-friendly softness of ES flat fibers can be improved. Moreover, after being stretched, the cellulose fibers can quickly recover their shape, further improving the tensile resistance of the surface layer. At the same time, it has good air permeability and hygroscopicity, and can ensure comfort while guiding liquids.

[0011] Preferably, the carrier calcium carbide whiskers are prepared from calcium carbide whiskers, fucoidan solution, and hydrophobic silica microparticles with a mass ratio of 1:0.1 - 0.2:0.1 - 0.15.

[0012] By adopting the above technical scheme, the calcium carbide whiskers, fucoidan solution, and hydrophobic silica microparticles are combined. By utilizing the bonding effect of the fucoidan solution, it is convenient for the hydrophobic silica microparticles to adhere to the surface of the calcium carbide whiskers. By utilizing the hydrophobicity of the hydrophobic silica microparticles and the hydrophilicity of fucoidan, water can be quickly drained and migrated through the hydrophobic silica microparticles, so that water is not likely to accumulate on the surface layer, ensuring the water drainage effect while ensuring the surface layer strength.

[0013] The calcium carbide whiskers, fucoidan solution, and hydrophobic silica microparticles are combined. By utilizing the good tensile strength of the hydrophobic silica microparticles in combination with the tensile strength of the calcium carbide whiskers and the adhesion stability of fucoidan, the tensile strength of the surface layer is improved. Even when the surface layer comes into contact with a large amount of water, it is not likely to affect the tensile strength of the surface layer, ensuring the tensile strength and durability of the diaper surface layer.

[0014] Fucoidan has good biocompatibility in combination with the soft touch of calcium carbide whiskers, improving the skin-friendly effect of the ES flat fiber surface layer.

[0015] Preferably, the hydrophobic silica microparticles are prepared by treating silica microparticles with an amino silane coupling agent.

[0016] By adopting the above technical solution, the silica microparticles are loaded with an amino-silane coupling agent. The amino group of the amino-silane coupling agent attracts and connects with the hydroxyl group in PHA, thereby improving the connection effect between the calcium carbide whisker as the loading material and other raw materials. Moreover, the amino-silane coupling agent on the surface of the silica microparticles can repel moisture, promoting the diversion and penetration of moisture around the hydrophobic silica microparticles, so as to quickly reach the diversion layer and the moisture absorption layer, realizing the rapid drainage of moisture by the adhesive layer of the diaper. During the use of the diaper, the skin-friendly softness and comfort of the surface layer can be ensured.

[0017] Preferably, the loaded nano-cellulose is prepared from nano-cellulose, polyvinyl alcohol-1799 solution and hydrophobic molecular sieve microparticles with a mass ratio of 1:0.05 - 0.1:0.1 - 0.2.

[0018] By adopting the above technical solution, nano-cellulose, polyvinyl alcohol-1799 solution and hydrophobic molecular sieve microparticles cooperate with each other. By utilizing the viscosity of the polyvinyl alcohol-1799 solution, it is convenient for the hydrophobic molecular sieve microparticles to adhere to the surface of the nano-cellulose. Polyvinyl alcohol-1799 is insoluble in normal temperature water and dissolves under the water temperature condition above 95 °C, ensuring the attachment stability of the polyvinyl alcohol-1799 solution to the hydrophobic molecular sieve microparticles on the surface of the nano-cellulose; although polyvinyl alcohol-1799 has hydroxyl groups and has hydrophilicity, after the polyvinyl alcohol-1799 solution forms a film, it has a certain barrier effect on moisture, controlling the nano-cellulose from absorbing excessive water and affecting the air permeability of the surface layer and the comfort of contacting the skin; and the temperature of human urine will not dissolve polyvinyl alcohol-1799. Cooperating with the pore diversion effect of the hydrophobic molecular sieve microparticles, it promotes the absorption of moisture by the diversion layer and the moisture absorption layer, ensuring the freshness, dryness, skin-friendly softness of the surface layer.

[0019] The hydroxyl groups on the surface of the loaded nano-cellulose cooperate with the hydroxyl groups and amino groups on the surface of the loaded calcium carbide whiskers, promoting the mutual connection between the loaded nano-cellulose and the loaded calcium carbide whiskers to form a connection network, filling in PE and PHA. While ensuring the circulation of moisture, the surface layer has good tensile strength and softness, improving the anti-tensile property and anti-tearing property of the diaper.

[0020] Preferably, the hydrophobic molecular sieve microparticles are prepared by treating molecular sieve with cetearyl alcohol solution.

[0021] By adopting the above technical solution, the cetearyl alcohol solution has certain hydrophobicity and penetrates into the pores of the molecular sieve, improving the hydrophobic effect of the pores of the molecular sieve, promoting the diversion of the moisture on the surface layer to the moisture absorption layer, preventing the reverse osmosis of moisture while ensuring air permeability, thereby ensuring the dryness of the surface layer; and cetearyl alcohol can improve the bonding effect between the loaded nano-cellulose and PHA and the loaded calcium carbide whiskers, increasing the compatibility, making the prepared surface layer have higher tensile strength; at the same time, the smooth characteristics of cetearyl alcohol can improve the delicate softness of the surface layer, reducing skin friction, thereby improving the soft comfort of the diaper.

[0022] Preferably, the PET core material is made of PET and chitosan particles in a mass ratio of 100:1-3.

[0023] By adopting the above technical solution, the antibacterial effect of chitosan particles is combined with the tensile strength of PET to further improve the tensile strength and antibacterial properties of ES flat fibers, and the prepared diapers have better durability and longer service life.

[0024] Preferably, the compatibilizer is maleic anhydride grafted polyethylene.

[0025] By adopting the above technical solution, the compatibility and connectivity between PE and other raw materials are improved, thereby improving the tensile strength and tensile strength of ES flat fibers, and diapers are not easily torn and damaged.

[0026] Preferably, the hygroscopic material in the hygroscopic layer is made of macroporous adsorption resin and coated coconut shell charcoal in a mass ratio of 100:10-25.

[0027] By adopting the above technical solution, the super absorbent resin has a good adsorption effect, which can lock in moisture after absorbing it. The porous structure of the coated coconut shell charcoal can efficiently adsorb odor molecules such as ammonia and hydrogen sulfide in urine, while adjusting the acid-base balance. Through fixed adsorption, the diapers are not easy to emit odor during use. In addition, the porous air permeability of the coated coconut shell charcoal reduces the feeling of stuffiness and improves the quality of diapers.

[0028] Preferably, the coated coconut shell charcoal is prepared from the coated coconut shell charcoal and the composite membrane liquid in a mass ratio of 1:0.8-1.5; the composite membrane liquid is prepared from polyvinyl alcohol-1799 solution, glutathione solution, glycerol and glutaraldehyde in a mass ratio of 1:0.2-0.36:0.05-0.1:0.01-0.02.

[0029] By adopting the above technical scheme, a composite film is formed on the surface of the coated coconut shell charcoal after the composite film liquid dries. The viscosity of the polyvinyl alcohol-1799 solution is utilized in combination with the filling of glutathione, and with the help of the plasticization of glycerol and the cross-linking effect of glutaraldehyde, the coating effect of the coated coconut shell charcoal is further improved. The barrier property of the polyethylene glycol-1799 solution after film formation is utilized to minimize the effect of the coated coconut shell charcoal on its adsorption of odors due to water absorption. In addition, the plasticization of glycerol and glutaraldehyde is utilized to improve the toughness and tensile strength of the film layer. When infants and young children are active, the surface layer is not easily torn, thereby ensuring the service life and quality of the diapers.

[0030] After the polyvinyl alcohol-1799 solution forms a film, it can adjust the diffusion path of the pore-forming liquid, and cooperate with glutathione to scavenge oxidative free radicals in urine, protect the long-term adsorption effect of the coated coconut shell charcoal. At the same time, glutathione can bind irritating substances such as ammonia and sulfides in urine, thereby controlling odors and extending the service life of the diaper.

[0031] In a second aspect, the present application provides a method for preparing a skin-friendly sanitary product based on flat fibers, adopting the following technical solution: A method for preparing a skin-friendly sanitary product based on flat fibers, comprising the following steps: S1. Melt the materials of the core layer to obtain a melt; S2. Mix and stir PE, PHA, and compatibilizer evenly, then add carrier calcium carbide whiskers and carrier nanocellulose and mix and stir evenly, and obtain a mixed melt after melting; S3. After mixing the melt and the mixed melt, perform spinning, bunching, stretching, heat setting, curling, and cutting to obtain ES flat fibers; S3. Weave the ES fibers into an ES flat fiber surface layer, and then bond the diversion layer, moisture absorption layer, and bottom film by spraying glue solution in sequence. After the glue solution dries and cures, the finished product is obtained.

[0032] By adopting the above technical solution, the prepared ES fiber surface layer has good tensile strength, softness, comfort, and moisture absorption. Combined with the moisture absorption layer, the diaper has the advantages of skin-friendly touch, dryness without greasiness, good tensile effect, and long service life.

[0033] In summary, the present application has the following beneficial effects: 1. The ES fiber surface layer has good tensile strength, softness, comfort, and moisture absorption. Combined with the moisture absorption layer, the diaper has the advantages of skin-friendly touch, dryness without greasiness, good tensile effect, and long service life. <�

[0034] 2. The polyvinyl alcohol-1799 solution and cetearyl alcohol cooperate. The film formed by the polyvinyl alcohol-1799 solution has selective permeability and can selectively permeate moisture. And the microporous structure of the film can evenly distribute the liquid flow rate, reducing the risk of gel caking caused by water absorption; cetearyl alcohol can reduce urine salts and inhibit the agglomeration tendency caused by the ion cross-linking of the water-absorbing resin, thereby preventing the problem of aggregation and accumulation of the water-absorbing resin in the moisture absorption layer from affecting the comfort of the diaper.

[0035] 3. The polyvinyl alcohol-1799 solution forms a transparent and dense film after drying, improving the skin-friendly comfort of the diaper surface layer; and the film formed by the polyvinyl alcohol-1799 solution has selective permeability to moisture, and tries to prevent liquid backflow, thereby ensuring the dryness of the surface layer. Description of the Drawings

[0036] Figure 1 It is a cross-sectional view of the ES flat fiber in Embodiment 1 of the present application. Specific embodiments

[0037] The present application will be further described in detail below in conjunction with embodiments.

[0038] The following raw materials are all commercially available.

[0039] Preparation example of carrier-loaded calcium carbide whiskers Preparation example 1: The carrier-loaded calcium carbide whiskers are prepared by the following method: Fucan is placed in water at a temperature of 85 °C and stirred until all the fucan is dissolved to obtain a 1% (by mass) fucan solution. 1 kg of silica gel microparticles are immersed and dispersed in 10 kg of an amino silane coupling agent, which is silane coupling agent KH-550. The ultrasonic dispersion frequency is 20 kHz, and the dispersion is carried out for 10 min. Then, the silica gel microparticles are filtered and separated to obtain hydrophobic silica gel microparticles; the average particle size of the silica gel microparticles is 300 nm. 0.15 kg of the fucan solution is evenly sprayed on the surface of 1 kg of calcium carbide whiskers. The average length of the calcium carbide whiskers is 2 μm. Then, 0.12 kg of hydrophobic silica gel microparticles are added, and after drying and dispersion, carrier-loaded calcium carbide whiskers are obtained. The average particle size of the carrier-loaded calcium carbide whiskers is less than 4 μm.

[0040] Preparation example 2: The difference between this preparation example and Preparation example 1 is as follows: 0.1 kg of the fucan solution is evenly sprayed on the surface of 1 kg of calcium carbide whiskers. The average length of the calcium carbide whiskers is 2 μm. Then, 0.1 kg of hydrophobic silica gel microparticles are added, and after drying and dispersion, carrier-loaded calcium carbide whiskers are obtained. The average particle size of the carrier-loaded calcium carbide whiskers is less than 4 μm.

[0041] Preparation example 3: The difference between this preparation example and Preparation example 1 is as follows: 0.2 kg of the fucan solution is evenly sprayed on the surface of 1 kg of calcium carbide whiskers. The average length of the calcium carbide whiskers is 2 μm. Then, 0.15 kg of hydrophobic silica gel microparticles are added, and after drying and dispersion, carrier-loaded calcium carbide whiskers are obtained. The average particle size of the carrier-loaded calcium carbide whiskers is less than 4 μm.

[0042] Preparation example of carrier-loaded nanocellulose Preparation example 4: The carrier-loaded nanocellulose is prepared by the following method: Soak and disperse 1 kg of molecular sieve in 10 kg of cetearyl alcohol solution. The average particle size of the molecular sieve is 2 μm, the frequency of ultrasonic dispersion is 20 kHz, and the dispersion time is 5 min. The cetearyl alcohol solution is a 2% (by mass) cetearyl alcohol ethanol solution with an ethanol mass fraction of 99%. Then filter and separate the molecular sieve, dry and disperse it to obtain hydrophobic molecular sieve particles; Place polyvinyl alcohol - 1799 in hot water at 95 °C and stir until polyvinyl alcohol - 1799 is completely dissolved to obtain a 1% (by mass) polyvinyl alcohol - 1799 solution; Spray 0.08 kg of polyvinyl alcohol - 1799 solution evenly on the surface of 1 kg of nanocellulose, then add 0.15 kg of hydrophobic molecular sieve particles. The average length of the nanocellulose is 200 nm, and the addition rate of the hydrophobic molecular sieve particles is 60 g / min. During the addition process, the nanocellulose is continuously stirred at a rotation speed of 120 r / min. After the addition is completed, continue to mix and stir for 10 min, and then dry and disperse to obtain loaded nanocellulose, and the average particle size of the loaded nanocellulose is less than 4 μm.

[0043] Preparation Example 5: The difference between this preparation example and Preparation Example 4 is that: Spray 0.05 kg of polyvinyl alcohol - 1799 solution evenly on the surface of 1 kg of nanocellulose, then add 0.1 kg of hydrophobic molecular sieve particles. The average length of the nanocellulose is 200 nm, and the addition rate of the hydrophobic molecular sieve particles is 60 g / min. During the addition process, the nanocellulose is continuously stirred at a rotation speed of 120 r / min. After the addition is completed, continue to mix and stir for 10 min, and then dry and disperse to obtain loaded nanocellulose, and the average particle size of the loaded nanocellulose is less than 4 μm.

[0044] Preparation Example 6: The difference between this preparation example and Preparation Example 4 is that: Spray 0.1 kg of polyvinyl alcohol - 1799 solution evenly on the surface of 1 kg of nanocellulose, then add 0.2 kg of hydrophobic molecular sieve particles. The average length of the nanocellulose is 200 nm, and the addition rate of the hydrophobic molecular sieve particles is 60 g / min. During the addition process, the nanocellulose is continuously stirred at a rotation speed of 120 r / min. After the addition is completed, continue to mix and stir for 10 min, and then dry and disperse to obtain loaded nanocellulose, and the average particle size of the loaded nanocellulose is less than 4 μm.

[0045] Preparation Example of Coated Coconut Shell Charcoal Preparation Example 7: The coated coconut shell charcoal is prepared by the following method: Place polyvinyl alcohol - 1799 in hot water at 95 °C and stir until polyvinyl alcohol - 1799 is completely dissolved to obtain a 1% (by mass) polyvinyl alcohol - 1799 solution; Place glutathione in water and stir until completely dissolved to obtain a 1% (mass fraction) glutathione solution; Weigh 1 kg of polyvinyl alcohol - 1799 solution and 0.3 kg of glutathione solution, mix and stir evenly, then add 0.08 kg of glycerol and mix and stir, then add 0.02 kg of glutaraldehyde, and mix and stir evenly at 60 °C to obtain a composite membrane solution; Spray 1 kg of the composite membrane solution evenly on the surface of 1 kg of coated coconut shell charcoal. The average particle size of the coated coconut shell charcoal is 80 μm. After drying and dispersing until the coated coconut shell charcoal does not adhere or agglomerate with each other, coated coconut shell charcoal is obtained.

[0046] Preparation Example 8: The difference between this preparation example and Preparation Example 7 is that: Weigh 1 kg of polyvinyl alcohol - 1799 solution and 0.2 kg of glutathione solution, mix and stir evenly, then add 0.05 kg of glycerol and mix and stir, then add 0.01 kg of glutaraldehyde, and mix and stir evenly at 60 °C to obtain a composite membrane solution; Spray 1 kg of the composite membrane solution evenly on the surface of 0.8 kg of coated coconut shell charcoal. The average particle size of the coated coconut shell charcoal is 80 μm. After drying and dispersing until the coated coconut shell charcoal does not adhere or agglomerate with each other, coated coconut shell charcoal is obtained.

[0047] Preparation Example 9: The difference between this preparation example and Preparation Example 7 is that: Weigh 1 kg of polyvinyl alcohol - 1799 solution and 0.36 kg of glutathione solution, mix and stir evenly, then add 0.1 kg of glycerol and mix and stir, then add 0.02 kg of glutaraldehyde, and mix and stir evenly at 60 °C to obtain a composite membrane solution; Spray 1 kg of the composite membrane solution evenly on the surface of 1.5 kg of coated coconut shell charcoal. The average particle size of the coated coconut shell charcoal is 80 μm. After drying and dispersing until the coated coconut shell charcoal does not adhere or agglomerate with each other, coated coconut shell charcoal is obtained. Example

[0048] Example 1: A skin-friendly sanitary product based on flat fibers: It includes an ES flat fiber surface layer, a diversion layer, a moisture absorption layer, and a bottom film; The skin material of the ES flat fibers in the ES flat fiber surface layer: 90 kg of PE, 25 kg of PHA, 2 kg of compatibilizer, 3 kg of carrier calcium carbide whiskers, 2 kg of carrier cellulose fibers; the compatibilizer is maleic anhydride grafted polyethylene; the carrier calcium carbide whiskers are the carrier calcium carbide whiskers prepared in Preparation Example 1, and the carrier nanocellulose is the carrier nanocellulose prepared in Preparation Example 4; The core material of the ES flat fibers: 100 kg of PET, 2 kg of chitosan microparticles, and the average particle size of the chitosan microparticles is 200 nm; The diversion layer is a hot air non-woven fabric; The moisture-absorbing layer is made by enclosing a moisture-absorbing material in a non-woven fabric and then sealing and stitching it. The moisture-absorbing material consists of macroporous adsorption resin and coated coconut shell charcoal with a mass ratio of 100:20. The coated coconut shell charcoal is the coated coconut shell charcoal prepared in Preparation Example 7; The preparation method is as follows: S1. Mix the materials of the core layer and place them in a screw extruder, and melt them at 250 °C to obtain a melt; S2. Mix and stir PE, PHA, and compatibilizer evenly, then add carrier calcium carbide whiskers and carrier cellulose fibers and mix and stir evenly, and carry out melting in a screw extruder. The temperature sections in the screw extruder are: conveying section 180 °C, melting section 210 °C, enhanced dispersion section 240 °C, kneading section 250 °C, exhaust section 240 °C, and homogenization section 230 °C to obtain a polyethylene melt and obtain a mixed melt; S3. After mixing the melt and the mixed melt, carry out spinning, bundling, stretching, heat setting, crimping, and cutting to obtain ES flat fibers; the spun fiber output is flat fibers, and the draw ratio is 3.7:1; S3. The ES flat fibers are woven to obtain an ES flat fiber surface layer. Apply a sizing solution on one side of the ES flat fiber surface layer at 30 mL per square meter, then bond a hot air non-woven fabric. The hot air non-woven fabric is a diversion layer. Then evenly apply a sizing solution on the side of the hot air non-woven fabric surface away from the ES flat fiber surface layer at 30 mL per square meter, then bond the moisture-absorbing layer. Apply a sizing solution evenly on the other side of the moisture-absorbing layer at 30 mL per square meter, then bond the bottom film. The bottom film is a PE film. After the sizing solution is completely dried and cured, the finished product is obtained; the sizing solution is a sodium carboxymethyl cellulose solution, and the sodium carboxymethyl cellulose solution is an aqueous solution of sodium carboxymethyl cellulose with a mass fraction of 1%.

[0049] Example 2: The difference between this example and Example 1 is that: The skin material of the ES flat fiber: 80 kg of PE, 20 kg of PHA, 1 kg of compatibilizer, 1 kg of carrier calcium carbide whiskers, 1 kg of carrier cellulose fibers; the compatibilizer is maleic anhydride grafted polyethylene; the carrier calcium carbide whiskers are the carrier calcium carbide whiskers prepared in Preparation Example 2, and the carrier nanocellulose is the carrier nanocellulose prepared in Preparation Example 5; The core material of the ES flat fiber: 100 kg of PET, 1 kg of chitosan microparticles, and the average particle size of the chitosan microparticles is 200 nm; The diversion layer is a hot air non-woven fabric; the moisture-absorbing layer consists of macroporous adsorption resin and coated coconut shell charcoal with a mass ratio of 100:10. The coated coconut shell charcoal is the coated coconut shell charcoal prepared in Preparation Example 8.

[0050] Example 3: The difference between this example and Example 1 is that: Skin material of ES flat fiber: 100 kg of PE, 30 kg of PHA, 3 kg of compatibilizer, 4 kg of calcium carbide whisker with carrier, 3 kg of cellulose fiber with carrier; the compatibilizer is maleic anhydride grafted polyethylene; the calcium carbide whisker with carrier is the calcium carbide whisker with carrier prepared in Preparation Example 3, and the nanocellulose with carrier is the nanocellulose with carrier prepared in Preparation Example 6; Core material of ES flat fiber: 100 kg of PET, 3 kg of chitosan microparticles, and the average particle size of the chitosan microparticles is 200 nm; The diversion layer is a hot air non-woven fabric; the moisture absorption layer is composed of macroporous adsorption resin and coated coconut shell charcoal with a mass ratio of 100:25, and the coated coconut shell charcoal is the coated coconut shell charcoal prepared in Preparation Example 9.

[0051] Example 4: The difference between this example and Example 1 is that: Hydrophobic silica microparticles were not added during the preparation of the calcium carbide whisker with carrier.

[0052] Example 5: The difference between this example and Example 1 is that: Fucan solution was not added during the preparation of the calcium carbide whisker with carrier.

[0053] Example 6: The difference between this example and Example 1 is that: Polyvinyl alcohol-1799 solution was not added during the preparation of the nanocellulose with carrier.

[0054] Example 7: The difference between this example and Example 1 is that: Hydrophobic molecular sieve microparticles were not added during the preparation of the nanocellulose with carrier.

[0055] Example 8: The difference between this example and Example 1 is that: During the preparation of the coated coconut shell charcoal in the moisture absorption layer, glutathione solution was not added.

[0056] Example 9: The difference between this example and Example 1 is that: Coated coconut shell charcoal was not added to the moisture absorption layer.

[0057] Comparative example Comparative example 1: The difference between this comparative example and Example 1 is that: Calcium carbide whisker with carrier and nanocellulose with carrier were not added to the raw materials.

[0058] Performance detection test 1. Detection of ES flat fiber structure The cross-sectional view of the ES flat fiber of Example 1 was observed by a scanning electron microscope, see Figure 1 .

[0059] 2. Detection of surface layer performance The ES flat fiber surface layers were prepared by the methods of Examples 1-7 and Comparative Example 1 respectively. The softness (longitudinal), breaking strength (longitudinal), and moisture regain were detected with reference to GB / T 24218.6, and the data were recorded; the air permeability was detected with reference to GB / T 5453, and the data were recorded; the skin-friendly property was scored, with good skin-friendly property, no surface fiber burrs, and smooth hand feeling being 10 points → poor skin-friendly property, serious surface fiber burrs on the surface layer, and rough hand feeling being 0 points, and the average value of 10 groups of data was recorded.

[0060] Table 1 Performance Test Table (in the table, " / " represents that the corresponding example or comparative example did not detect this item, so there is no data)

[0061] Combined with Examples 1-7 and Comparative Example 1 and Table 1, it can be seen that the surface layer prepared in this application has good skin-friendly softness, high tensile strength, is not easy to regain moisture, and also has good air permeability; Example 4 verifies that the addition of hydrophobic silica gel particles can further improve the structural tensile strength of the surface layer, can control moisture regain, and can also improve the softness of the surface layer; Example 5 verifies that the addition of fucoidan can improve the skin-friendly effect and softness, and can improve the tensile strength of the surface layer through the crosslinking effect, and can also control the moisture regain situation; Example 6 verifies that the added polyvinyl alcohol-1799 solution can improve the softness and tensile strength of the surface layer, and has a good skin-friendly effect while controlling moisture regain; Example 7 verifies that the added hydrophobic molecular sieve particles improve the structural stability of the surface layer by their filling effect and control the moisture regain amount; Comparative Example 1 verifies that the combination of carrier calcium carbide whiskers and carrier nanocellulose can improve the softness of the surface layer, control the moisture regain amount, and have a good skin-friendly effect at the same time.

[0062] 3. Performance Detection of Diapers The finished products (diapers) were prepared by the methods of Examples 1-3 and 8-9 respectively; The absorption rate was detected with reference to GB / T 22875, and the test liquid was sodium chloride aqueous solution; 5 g of the absorbent core layer sample was weighed and added to a beaker, 50 mL of 0.9% sodium chloride aqueous solution was weighed and added to the beaker, and timing was started immediately. After observing that the liquid completely disappeared on the surface of the absorbent core layer sample and there was no liquid when the beaker was tilted 60°, the timing was stopped, and the data were recorded. The average value was taken for 3 parallel groups. The faster the absorption rate, the better the hygroscopicity; According to the GB / T 8939-2018 standard, one end of the diaper test sample was clamped with a clip, and the diaper with the antibacterial surface layer facing up was immersed in a constant temperature water bath containing 12 cm deep artificial urine together with the clip. After being immersed for 60 s, the clip was lifted, and after the diaper was vertically suspended for 100 s, its wet weight was weighed, and the liquid absorption ratio of the diaper was calculated; liquid absorption ratio = (mass after liquid absorption - mass before liquid absorption) / mass before liquid absorption, and the data were recorded; Deodorization test: Cut the finished product sample into a size of 120 mm × 120 mm. Set the temperature of the sealed environment to 25 °C and the relative humidity to 60%. Measure 40 mL of ammonia water and 5 mL of sodium hydroxide and pour them into the experimental container. Close the sealed box and let it stand for 1 h to measure the ammonia water concentration in the sealed box. Then place the test sample in the sealed box and measure the ammonia gas concentration in the sealed box after standing for 18 h, and calculate the deodorization rate in the sealed box.

[0063] Table 2 Performance test table (in the table, " / " means that the corresponding example or comparative example did not detect this item, so there is no data)

[0064] Combining Examples 1-3 and Examples 8-9 and referring to Table 2, it can be seen that the skin-friendly sanitary product diaper prepared in this application has good hygroscopicity and good deodorization effect; glutathione was not added in Example 8, and coated coconut shell charcoal was not added in Example 9, and the deodorization effect is worse than that of Example 1, indicating that the coated coconut shell charcoal treated with polyvinyl alcohol-1799 solution, glutathione solution, glycerol and glutaraldehyde has a good deodorization effect.

[0065] This specific embodiment is only an explanation of this application, and it is not a limitation of this application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A skin-friendly hygiene product based on flat fibers, characterized in that, It includes an ES flat fiber surface layer, a diversion layer, a moisture absorption layer and a bottom film; The skin material of the ES flat fiber in the ES flat fiber surface layer is made of the following raw materials in parts by weight: 80-100 parts of PE, 20-30 parts of PHA, 1-3 parts of compatibilizer, 1-4 parts of carrier calcium carbide whiskers, and 1-3 parts of carrier nanocellulose; The core material of the ES flat fiber is a PET core material.

2. The skin-friendly sanitary product based on flat fibers according to claim 1, wherein: The carrier calcium carbide whiskers are prepared from calcium carbide whiskers, fucoidan solution and hydrophobic silica microparticles with a mass ratio of 1:0.1-0.2:0.1-0.

15.

3. The skin-friendly hygiene product based on flat fibers according to claim 2, wherein The hydrophobic silica microparticles are prepared by treating silica microparticles with an amino silane coupling agent.

4. The skin-friendly hygiene product based on flat fibers according to claim 1, wherein The carrier nanocellulose is prepared from nanocellulose, polyvinyl alcohol-1799 solution and hydrophobic molecular sieve microparticles with a mass ratio of 1:0.05-0.1:0.1-0.

2.

5. The skin-friendly sanitary product based on flat fibers according to claim 4, characterized in that, The hydrophobic molecular sieve microparticles are prepared by treating molecular sieves with cetostearyl alcohol solution.

6. The skin-friendly sanitary product based on flat fibers according to claim 1, wherein The PET core material is prepared from PET and chitosan microparticles with a mass ratio of 100:1-3.

7. The skin-friendly sanitary product based on flat fibers according to claim 1, characterized in that The compatibilizer is maleic anhydride grafted polyethylene.

8. The skin-friendly sanitary product based on flat fibers according to claim 1, wherein The moisture absorbent in the moisture absorption layer is prepared from macroporous adsorption resin and coated coconut shell charcoal with a mass ratio of 100:10-25.

9. The skin-friendly hygiene product based on flat fibers according to claim 8, characterized in that, The coated coconut shell charcoal is prepared from coated coconut shell charcoal and composite film solution with a mass ratio of 1:0.8-1.5; the composite film solution is prepared from polyvinyl alcohol-1799 solution, glutathione solution, glycerol and glutaraldehyde with a mass ratio of 1:0.2-0.36:0.05-0.1:0.01-0.

02.

10. A method for preparing a skin-friendly hygiene product based on flat fibers according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Melting the materials of the core layer to obtain a melt; S2. Mixing and stirring PE, PHA and compatibilizer evenly, then adding carrier calcium carbide whiskers and carrier nanocellulose and mixing and stirring evenly, and melting to obtain a mixed melt; S3. After mixing the melt and the mixed melt, through spinning, bundling, stretching, heat setting, crimping and cutting, ES flat fibers are obtained; S3. The ES fibers are woven into an ES flat fiber surface layer, and then the diversion layer, the moisture absorption layer and the bottom film are sequentially bonded by spraying glue solution. After the glue solution is dried and cured, the finished product is obtained.

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