Far infrared negative ion health product and preparation method thereof

Abstract

The application belongs to the technical field of sanitary products, and specifically discloses a far-infrared anion sanitary product and a preparation method thereof. The far-infrared anion sanitary product comprises a bamboo fiber non-woven fabric layer, an absorption layer and a PLA leakage-proof layer. The absorption layer comprises a far-infrared anion fiber layer and an anion chip. The far-infrared anion fiber layer is prepared by coating ES fiber with graphene composite material. The graphene composite material comprises the following components: modified graphene, composite polypropylene fiber, guar gum, sucrose monolaurate, carboxymethyl cellulose and deionized water. The sanitary product obtained by mixing various raw materials in the application has the advantages of anion bacteriostasis, far-infrared physiotherapy, absorption speed and mechanical properties.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sanitary products, in particular to a far-infrared anion sanitary product and a preparation method thereof. BACKGROUND

[0002] The far-infrared anion sanitary product is a new type of health care sanitary product developed on the basis of traditional sanitary products by combining far-infrared technology and anion technology. Far-infrared rays can be absorbed by the human body and converted into heat energy, promoting blood circulation and metabolism, and helping to relieve dysmenorrhea and improve immunity. Anions can inhibit the growth of bacteria, mold and other microorganisms, and reduce the occurrence of gynecological inflammation.

[0003] The existing far-infrared composite sanitary napkin generally comprises a liquid-permeable surface layer, an absorbent core and a liquid-impermeable bottom layer arranged in sequence. The absorbent core is usually composed of a bulky non-woven fabric, and carries a far-infrared anion functional chip. The non-woven fabric is usually made of polypropylene fibers. In the spinning process, the fibers are prone to breakage or entanglement, resulting in broken filaments and affecting the finished product. SUMMARY

[0004] In order to improve the problem of easy breakage of non-woven fabric in the spinning process, the application provides a far-infrared anion sanitary product and a preparation method thereof.

[0005] The application provides a far-infrared anion sanitary product, which adopts the following technical scheme:

[0006] The far-infrared anion sanitary product comprises a bamboo fiber non-woven fabric layer, an absorbent layer and a PLA leakage-proof layer. The absorbent layer comprises a far-infrared anion fiber layer and an anion chip. The far-infrared anion fiber layer is prepared from graphene composite material coated ES fiber. The graphene composite material comprises the following components: modified graphene, composite polypropylene fiber, guar gum, sucrose monolaurate, carboxymethyl cellulose and deionized water.

[0007] By adopting the above technical scheme, the outermost layer is the bamboo fiber non-woven fabric layer. The bamboo fiber non-woven fabric has natural antibacterial property, good air permeability and softness, and can provide comfortable use experience, reduce the risk of stuffiness and skin sensitivity during use. The middle layer is the absorbent layer for absorbing liquid. The inner layer is the PLA leakage-proof layer. Polylactic acid is a biodegradable material with water resistance and flexibility, which can effectively prevent liquid extravasation and ensure safety during use.

[0008] In the absorption layer, the far-infrared anion fiber layer is prepared by coating ES fiber with graphene composite material. The modified graphene enhances the far-infrared emission performance, promotes local blood circulation, and promotes the release of anions. At the same time, it has antibacterial, heat-conducting, and mechanical performance characteristics. The composite polypropylene fiber provides mechanical support, combines with the ES fiber to improve the strength, toughness, and loft of the layer structure. Guar gum and carboxymethyl cellulose act as adhesives to enhance the formability of the composite material, while also having water absorption and retention capabilities, which improve water retention and solution viscosity, allowing the graphene composite material to be stably loaded on the surface of the ES fiber, improving the structural strength and stability of the far-infrared anion fiber. Sucrose monolaurate improves the uniformity of the composite material, preventing graphene aggregation, and ensures uniform dispersion of all components in the system, which facilitates uniform loading of subsequent components.

[0009] The ES fiber can quickly absorb the liquid contacted by the sanitary napkin, allowing the liquid to quickly leave the skin surface, keeping the skin dry and comfortable. In the absorption layer, the ES fiber acts as a skeletal support, allowing the absorption layer to maintain a certain shape and structural integrity after absorbing liquid. The far-infrared anion fiber layer obtained by coating the ES fiber with graphene composite material has excellent mechanical properties, absorbency, and antibacterial properties. The anion chip can release negative ions, which can help eliminate odors. The far-infrared anion fiber layer and the anion chip obtain an absorption layer with anion antibacterial, far-infrared physiotherapy, absorption speed, and leak-proof ability.

[0010] Preferably, the preparation method of the modified graphene comprises the following steps:

[0011] (1) Cut the motherwort into sections and disperse it in deionized water. Add sodium chloride and heat at a temperature of 90-95°C for 3-4 hours. Filter to obtain a filtrate;

[0012] (2) Mix graphene, modified pearl powder, and polyvinylpyrrolidone, and wet-grind to obtain a mixture;

[0013] (3) Disperse the mixture of step (2) in the filtrate of step (1), and ultrasonic for 2-3 hours. Add sodium alginate, sodium dodecylbenzenesulfonate, and Tween-80, and stir at a temperature of 80-85°C for 1-2 hours. Dry to obtain modified graphene.

[0014] By using the above technical solution, the effective components in motherwort are extracted by treating motherwort. Motherwort contains various alkaloids, flavonoids, and other components, which have various physiological activities such as promoting blood circulation and antibacterial properties. Sodium chloride increases the ionic activity of the extract, which helps the extraction process and improves the dissolution rate of the effective components.

[0015] The graphene, modified pearl powder and polyvinylpyrrolidone are mixed and ground. The graphene has excellent mechanical, electrical and thermal properties. The modified pearl powder contains various mineral components, such as calcium, magnesium and other elements. These components can interact with the graphene. The surface hydroxyl groups of the modified pearl powder form hydrogen bonds with the carboxyl groups of the graphene, change the surface properties of the graphene, enhance the interfacial bonding force, enhance the negative ion release capacity and improve the biocompatibility of the material. The polyvinylpyrrolidone is adsorbed on the surface of the graphene through π-π stacking, prevents the re-aggregation between the graphene layers, obtains a relatively uniformly dispersed mixture, ensures the uniformity of grinding, and the polar groups (pyrrolidone ring) of the polyvinylpyrrolidone can be miscible with the polar molecules (such as polysaccharides) in the motherwort extract, which improves the subsequent dispersion compatibility.

[0016] Wet grinding causes the graphene layers to be exfoliated and dispersed. The mineral components in the modified pearl powder fill the interlayers of the graphene or chemically adsorb to the surface of the graphene, change the surface charge distribution and hydrophilicity of the graphene. The molecular chains of the polyvinylpyrrolidone can be adsorbed on the surface of the graphene, forming a kind of steric hindrance effect to prevent the re-aggregation of the graphene layers.

[0017] Sodium alginate has good film-forming property and biocompatibility. The carboxylate groups form ionic bonds with the hydroxyl groups of the graphene and the Ca²⁺ of the pearl powder, constructing a three-dimensional network coating layer, improving the stability and mechanical properties of the composite material. Sodium dodecyl benzene sulfonate adjusts the surface activity of the system, making the dispersion of the graphene and other materials more uniform, and changing the charge properties of the graphene surface. Tween-80 has good emulsifying and dispersing properties, further preventing the agglomeration of graphene and other particles. After drying, the modified graphene has the characteristics of complexing with the active ingredients of motherwort, changing the surface properties, etc., and has the characteristics of improving the release amount of negative ions, improving the far-infrared emissivity, improving local blood circulation, antibacterial and mechanical properties.

[0018] Preferably, the mass ratio of the graphene, modified pearl powder and sodium alginate is 1:0.2-0.3:0.04-0.06.

[0019] By adopting the technical scheme, the mass ratio of the mixed graphene, modified pearl powder and sodium alginate is further limited, so that the modified graphene has excellent comprehensive performance. The graphene has high thermal conductivity, strong adsorption, good mechanical strength and electrical conductivity, emits far infrared rays, can promote local blood circulation, and has antibacterial and bacteriostatic performance. The modified pearl powder contains various minerals (such as calcium and magnesium), which can also interfere with the growth environment of bacteria and enhance the antibacterial effect. The graphene and the modified pearl powder are adsorbed with each other, and the comprehensive performance of the graphene is enhanced. The sodium alginate has moisturizing, film forming and biocompatibility, forms ionic bonds with the graphene hydroxyl and the pearl powder Ca²⁺ through carboxylate, constructs a three-dimensional network coating layer, has good stability, and the obtained modified graphene has the functions of promoting blood circulation by far infrared rays, enhancing bacteriostasis and air purification by negative ions, improving the flexibility and tensile strength of the composite material, and avoiding damage during use.

[0020] Preferably, the preparation method of the modified pearl powder comprises the following steps: dispersing pearl powder in deionized water, adding sodium hydroxide and lauroyl lysine, ultrasonicating at a temperature of 70-75℃ for 1-2h, filtering, and obtaining pretreated pearl powder; dispersing the high molecular water-absorbing resin in deionized water, stirring uniformly at 85-90℃, adding the pretreated pearl powder and nano silicon dioxide, stirring at 1000-1200rpm for 50-55min, adding boric acid, continuing to stir for 1-2h, drying at 60-65℃ for 12-14h, and grinding to obtain the modified pearl powder.

[0021] By adopting the technical scheme, the pH value of the solution can be adjusted by sodium hydroxide, so that the charge property of the surface of the pearl powder changes, active calcium sites are generated, and the pearl powder is helpful for compounding with other components; lauroyl lysine has good surface activity, and the dispersion effect of the pearl powder is further enhanced. After the pretreatment of the pearl powder, the solubility and stability of the pearl powder are improved. In the subsequent mixing process with other materials, the pearl powder can better interact with other components, and the uniformity of the whole system is improved.

[0022] The high molecular water-absorbing resin has strong water absorption capacity, can absorb a large amount of water and form a hydrogel, and after being mixed with the pretreated pearl powder and nano silicon dioxide, the surface property of the pearl powder is modified, so that the modified pearl powder can better synergize with the high molecular water-absorbing resin when absorbing water, thereby further enhancing the water absorption and water retention of the modified pearl powder. The addition of nano silicon dioxide can improve the stability of the pearl powder. The nano silicon dioxide has a high specific surface area and surface energy, and fills the network pores of PVA. The mechanical properties of the system are improved, and the surface silicon hydroxyl enhances the negative ion release capacity.

[0023] Meanwhile, boric acid is added during stirring, and boric acid and the hydroxyl groups of PVA undergo crosslinking reaction to form reversible borate ester bonds, so that the gel structure is more compact, and boric acid also undergoes chemical reaction with pearl powder and nano-silicon dioxide to form a network structure, a double crosslinking network is constructed, and the stability of the modified pearl powder is further improved. The obtained modified pearl powder has high strength, good flexibility, strong water absorption and stability.

[0024] Preferably, the preparation method of the composite polypropylene fiber comprises the following steps:

[0025] (1) irradiating the polypropylene fiber under ultraviolet light of 330-350 nm for 6-8 h, then dispersing it in an ethanol solution, stirring for 1-2 h, filtering, and drying to obtain treated polypropylene fiber;

[0026] (2) dispersing the modified kaolin in deionized water, adding the treated polypropylene fiber of step (1), stirring at a temperature of 60-65°C for 1-2 h, filtering, and drying to obtain a mixture;

[0027] (3) adding the mixture to a xanthan gum aqueous solution, drying, and grinding to obtain a composite polypropylene fiber;

[0028] The xanthan gum aqueous solution raw material comprises xanthan gum, acrylate emulsion, and deionized water.

[0029] By adopting the above technical solution, the purpose of irradiation under ultraviolet light is to modify the surface of the polypropylene fiber. Ultraviolet light irradiation can produce free radicals on the surface of the polypropylene fiber, increase the roughness and chemical activity of the fiber surface, and thus improve the compatibility and bonding force with subsequent materials. Ethanol solution cleaning further cleans the fiber surface and removes possible impurities and low molecular weight substances, better dispersing the treated fiber.

[0030] The modified kaolin has a layered structure and a large specific surface area, and the surface is rich in hydroxyl groups. The modified kaolin is attached to the surface of the polypropylene fiber to form an inorganic-organic composite structure, improving the mechanical strength, heat resistance and functionality of the fiber. The layered structure of the kaolin may form a "bridge" between the fibers, enhancing the overall stability of the composite material. The polar groups on the fiber surface and the active sites (such as hydroxyl groups and silane groups) of the modified kaolin undergo physical adsorption or chemical reaction, realizing firm combination of the two, and avoiding falling off during subsequent processing.

[0031] Spraying xanthan gum aqueous solution on the surface of the mixture makes the modified kaolin and polypropylene fibers adhere closely, further improving the comprehensive performance of the composite polypropylene fibers. The binder penetrates into the intergranular gap through mechanical force, promotes interface fusion, and forms a more compact composite structure. The obtained composite polypropylene fibers have good compatibility with other materials, improving the absorption, leakage prevention, and functional release (such as negative ions and far infrared) of the composite polypropylene fibers, enhancing the flexibility and tear resistance of the composite material, and meeting the production requirements of ultra-thin sanitary products.

[0032] Preferably, the mass ratio of the polypropylene fibers, the modified kaolin, and the xanthan gum aqueous solution is 1:0.4-0.6:0.1-0.2.

[0033] By adopting the above technical solution, the mass ratio of the polypropylene fibers, the modified kaolin, and the xanthan gum aqueous solution is further limited within a certain range. The obtained composite polypropylene fibers have relatively optimal comprehensive performance. As a high molecular polymer, the composite system provides a mechanical basis, giving the material certain strength, toughness, and spinnability. The modified kaolin has a layered structure and a high specific surface area, which can adhere to the surface of the polypropylene fibers to form a "fiber-filler" composite structure, improving the tensile strength, tear resistance, far infrared emission, and negative ion release performance of the material. The polar surface of the modified kaolin forms a strong interfacial bond with the modified surface of the polypropylene fibers, reducing "void defects" in the composite material and improving the overall stability.

[0034] The xanthan gum aqueous solution physically wraps and bonds the polypropylene fibers and the modified kaolin into a whole, penetrates into the gap between the fibers and the fillers, forms a continuous phase network, and improves the formability and structural strength of the composite system. The obtained composite polypropylene fibers have good mechanical properties, far infrared / negative ion performance, and spinnability, which are mutually synergistic, comprehensively improving the performance of the composite material.

[0035] Preferably, the preparation method of the modified kaolin comprises the following steps: dispersing kaolin in deionized water, adding sodium hexametaphosphate and water glass, stirring for 2-3 h, filtering, grinding, obtaining kaolin with a particle size of 1-3 µm, dispersing the kaolin in deionized water again, adding cetyltrimethylammonium bromide and activated carbon powder, ultrasonicating for 3-4 h, then adding gum arabic, stirring at a temperature of 65-70 °C for 20-30 min, and drying to obtain the modified kaolin.

[0036] By adopting the above technical scheme, sodium hexametaphosphate and metal ions on the surface of kaolin particles undergo complexation reaction, thereby changing the charge distribution on the particle surface, increasing the electrostatic repulsion between particles, preventing particle agglomeration, and enabling kaolin to be more uniformly dispersed in water. Water glass (sodium silicate) also plays a certain dispersing and stabilizing role, chemically reacts with the surface of kaolin, preliminarily modifies kaolin, reduces the surface energy of particles, and promotes particle size refinement during mechanical grinding.

[0037] The kaolin is again dispersed in deionized water, and cetyltrimethylammonium bromide and activated carbon powder are added. The cetyltrimethylammonium bromide is adsorbed on the surface of the kaolin particles, changes the surface electrical properties of the kaolin, and makes it change from hydrophilic to hydrophobic. The organic matrix (such as polypropylene fiber, resin) is compatible.

[0038] The activated carbon powder has a highly developed pore structure and a large specific surface area, and has a strong adsorption capacity. The porous structure of the activated carbon and the layered structure of the kaolin form a multi-level pore system, and the activated carbon is tightly combined with the kaolin through electrostatic attraction to prevent the activated carbon from falling off. Then, gum arabic is added. Gum arabic has good water solubility and colloid protection performance, is adsorbed on the surface of the modified kaolin particles, forms a protective film, and wraps the activated carbon particles, further improving the stability of the kaolin particles, preventing the particles from re-agglomerating during the drying process, and also improving the compatibility and processability of the modified kaolin with subsequent materials. The modified kaolin has a dual hydrophilic surface, a multi-level pore structure, and a controllable release function, and is a composite modified material. When combined with other raw materials, the corresponding properties of the composite polypropylene fiber are improved.

[0039] Preferably, the negative ion chip raw material includes nano-sized calcium zeolite powder, tourmaline powder, nano-silver, and polyethylene.

[0040] By adopting the above technical scheme, the nano-sized calcium zeolite powder has a unique pore structure and ion exchange performance, a larger specific surface area, and can more effectively adsorb and release ions. The tourmaline powder can produce piezoelectric and pyroelectric effects. When the tourmaline is subjected to friction, pressure, or temperature changes, electric charges will be generated on its surface. These electric charges can excite water molecules and oxygen molecules in the air to produce negative ions. The nano-silver has super strong antibacterial properties. Adding nano-silver to the negative ion chip can effectively inhibit the growth and reproduction of bacteria, mold, and other microorganisms, prevent the chip from being contaminated by microorganisms during use, and prolong the service life of the chip. Polyethylene has good film-forming properties and processability. During the preparation of the negative ion chip, polyethylene serves as the base material, uniformly dispersing other materials (calcium zeolite powder, tourmaline powder, nano-silver) therein, so that various materials can be well combined together to form an integral chip structure. At the same time, polyethylene can also improve the flexibility and mechanical strength of the chip, making it less likely to break or be damaged during use.

[0041] Preferably, the composition includes 5-6 parts modified graphene, 3-4 parts composite polypropylene fiber, 2-3 parts guar gum, 3-4 parts sucrose monolaurate, 2-3 parts carboxymethyl cellulose, and 70-80 parts deionized water.

[0042] By adopting the above technical solution and further limiting the amount of each raw material, the graphene composite material obtained within this range has good mechanical properties, absorption and adhesion, which is helpful for composite with ES fiber.

[0043] Secondly, this application also provides a method for preparing far-infrared negative ion hygiene products, comprising the following steps:

[0044] The negative ion chip is adhered to the far-infrared negative ion fiber layer to obtain the absorption layer;

[0045] The bamboo fiber nonwoven fabric layer, absorbent layer, and PLA leak-proof layer are stacked in sequence, cut into the required shape of the sanitary napkin, and the edges of the multi-layer structure are sealed to obtain far-infrared negative ion sanitary products.

[0046] By adopting the above technical solution and preparation method, the process time is short and the operation is simple, which improves the production efficiency of far-infrared negative ion hygiene products. The far-infrared negative ion hygiene products obtained have good mechanical properties, absorbency, and antibacterial properties.

[0047] In summary, this application has the following beneficial effects:

[0048] 1. In this application, the far-infrared negative ion fiber layer is prepared by coating ES fibers with graphene composite material. The modified graphene enhances the far-infrared emission performance, promotes local blood circulation, and increases the release of negative ions. It also has antibacterial, thermally conductive, and mechanical properties.

[0049] 2. The far-infrared negative ion sanitary products in this application have mechanical properties, negative ion antibacterial properties, far-infrared physiotherapy, absorption speed, and leak-proof ability.

[0050] 3. In this application, the composite polypropylene fiber provides mechanical support, and its combination with ES fiber enhances the strength, toughness, and bulkiness of the layer structure. Detailed Implementation

[0051] The present application will be further described in detail below with reference to the embodiments.

[0052] The raw materials used in the examples and comparative examples are all commercially available.

[0053] Example of modified graphene preparation:

[0054] Preparation Example 1

[0055] A method for preparing modified graphene, comprising the following steps:

[0056] (1) 100 kg of motherwort is cut into sections, dispersed in 150 L of deionized water, 10 kg of sodium chloride is added, heated at a temperature of 95 ℃ for 3.5 h, filtered to obtain a filtrate;

[0057] (2) 8 kg of graphene, modified pearl powder, and 1 kg of polyvinylpyrrolidone are mixed and wet ground to obtain a mixture;

[0058] (3) The mixture of step (2) is dispersed in the filtrate of step (1), ultrasonically treated for 2.5 h, 0.5 kg of sodium dodecylbenzenesulfonate and 0.3 kg of Tween-80 are added, stirred at a temperature of 83 ℃ for 1.5 h, and dried to obtain modified graphene.

[0059] The mass ratio of graphene, modified pearl powder, and sodium alginate is 1:0.2:0.06.

[0060] A method for preparing modified pearl powder, comprising the following steps: 10 kg of pearl powder is dispersed in 20 L of deionized water, 0.8 kg of sodium hydroxide and 1 kg of lauroyl lysine are added, ultrasonically treated at a temperature of 72 ℃ for 1.5 h, filtered to obtain pretreated pearl powder; 5 kg of high molecular water-absorbing resin is dispersed in 50 L of deionized water, stirred uniformly at 87 ℃, 2.5 kg of pretreated pearl powder and 1 kg of nano silicon dioxide are added, stirred at 1100 rpm for 53 min, 0.75 kg of boric acid is added, and stirring is continued for 1.5 h, and dried at 62 ℃ for 13 h, and ground to obtain modified pearl powder. The high molecular water-absorbing resin is purchased from Henan Haire Chemical Product Co., Ltd.

[0061] Preparation Example 2

[0062] The difference from Preparation Example 1 is that no modified pearl powder is added in step (2).

[0063] Preparation Example 3

[0064] The difference from Preparation Example 1 is that no sodium alginate is added in step (3).

[0065] Preparation Example 4

[0066] The difference from Preparation Example 1 is that the mass ratio of graphene, modified pearl powder, and sodium alginate is 1:0.3:0.04.

[0067] Preparation Example 5

[0068] The difference from Preparation Example 1 is that the mass ratio of graphene, modified pearl powder, and sodium alginate is 1:0.08:0.3.

[0069] Preparation Example 6

[0070] The difference from Preparation Example 1 is that no high molecular water-absorbing resin is added in the preparation method of the modified pearl powder.

[0071] Preparation Example 7

[0072] The difference from Preparation Example 1 is that no nano-silicon dioxide is added in the preparation method of the modified pearl powder.

[0073] Preparation of composite polypropylene fiber

[0074] Preparation Example 8

[0075] The preparation method of the composite polypropylene fiber comprises the following steps:

[0076] (1) 15 kg of polypropylene fiber is irradiated under 340 nm ultraviolet light for 7 h, then dispersed in 25 L of an ethanol solution, stirred for 1.5 h, filtered, and dried to obtain treated polypropylene fiber;

[0077] (2) The modified kaolin is dispersed in 50 L of deionized water, and the treated polypropylene fiber of step (1) is added, stirred at a temperature of 62℃ for 1.5 h, filtered, and dried to obtain a mixture;

[0078] (3) The mixture is added to a xanthan gum aqueous solution, dried, and ground to obtain a composite polypropylene fiber;

[0079] The raw materials of the xanthan gum aqueous solution include 1.5 kg of xanthan gum, 30 kg of an acrylate emulsion, and 100 kg of deionized water, which are uniformly mixed at 40℃ to obtain the xanthan gum aqueous solution, and the required amount is used for the preparation of the composite polypropylene fiber.

[0080] The mass ratio of the polypropylene fiber, the modified kaolin, and the xanthan gum aqueous solution is 1:0.4:0.2.

[0081] The preparation method of the modified kaolin comprises the following steps: 10 kg of kaolin is dispersed in 25 L of deionized water, 2 kg of sodium hexametaphosphate and 1 kg of water glass are added, stirred for 2.3 h, filtered, and ground to obtain kaolin with a particle size of 1-3 µm. The kaolin is again dispersed in 30 L of deionized water, 2.5 kg of cetyltrimethylammonium bromide and 2 kg of activated carbon powder are added, ultrasonically treated for 3.5 h, 0.8 kg of gum arabic is further added, stirred at a temperature of 67℃ for 25 min, and dried to obtain the modified kaolin.

[0082] Preparation Example 9

[0083] The difference from Preparation Example 8 is that no modified kaolin is added in step (2).

[0084] Preparation Example 10

[0085] The difference from Preparation Example 8 is that, in step (3), no xanthan gum aqueous solution is added.

[0086] Preparation Example 11

[0087] The difference from Preparation Example 8 is that the mass ratio of polypropylene fiber, modified kaolin and xanthan gum aqueous solution is 1:0.6:0.1.

[0088] Preparation Example 12

[0089] The difference from Preparation Example 8 is that the mass ratio of polypropylene fiber, modified kaolin and xanthan gum aqueous solution is 1:0.1:0.5.

[0090] Preparation Example 13

[0091] The difference from Preparation Example 8 is that, in the preparation method of the modified kaolin, no activated carbon powder is added.

[0092] Preparation Example 14

[0093] The difference from Preparation Example 8 is that, in the preparation method of the modified kaolin, no gum arabic is added.

[0094] Example 1 A far infrared anion health product, comprising a bamboo fiber non-woven fabric layer, an absorption layer, a PLA leakage-proof layer, the absorption layer comprising a far infrared anion fiber layer and an anion chip, the far infrared anion fiber layer being prepared from graphene composite material coated ES fiber; the graphene composite material comprising the following components: modified graphene 5 kg, composite polypropylene fiber 4 kg, guar gum 3 kg, sucrose monolaurate 4 kg, carboxymethyl cellulose 2 kg, deionized water 70 kg.

[0095] The raw materials of the anion chip include nano calcium zeolite powder, tourmaline powder, nano silver and polyethylene.

[0096] 10 kg of nano calcium zeolite powder, 30 kg of tourmaline powder, 5 kg of nano silver and 20 kg of polyethylene are uniformly mixed and dispersed in 100 L of deionized water, stirred at 380 r / min for 22 min to obtain a slurry, scraped on the surface of a glass plate, dried and cut to obtain an anion chip (thickness of 0.1 mm).

[0097] The bamboo fiber non-woven fabric is purchased from Kaimeixing (Hebei) Cellulose Co., Ltd., and the PLA leakage-proof layer is purchased from Dongguan Global Environmental Protection Technology Co., Ltd.

[0098] The preparation method of the far infrared anion fiber layer comprises the following steps:

[0099] Mix 20 kg core layer polypropylene and 10 kg skin layer high density polyethylene, melt extrude at 220℃, spin (winding speed 1800 m / min, spinneret draw ratio 1:3.5) to obtain ES fiber;

[0100] Mix the modified graphene, composite polypropylene fiber, guar gum, sucrose monolaurate, carboxymethyl cellulose and deionized water uniformly, stir at 45℃ for 1.5h to obtain a mixed solution; dip the ES fiber in the mixed solution, take it out after 5min, dry to obtain far infrared anion fiber; orthogonally lay the fiber, spray 1kg of 8% mass fraction water-based polyurethane adhesive aqueous solution, hot press at 95℃ for 25s to obtain a far infrared anion fiber layer (thickness 1mm).

[0101] The preparation method of the far infrared anion sanitary product described above comprises the following steps:

[0102] Adhere the anion chip to the far infrared anion fiber layer at 82℃ to obtain an absorption layer; the adhesive is EVA hot melt adhesive;

[0103] Stack the bamboo fiber non-woven fabric layer, the absorption layer and the PLA leakage prevention layer in sequence, cut out the shape required by the sanitary napkin, ultrasonic edge sealing (amplitude 40μm, pressure 0.5MPa) to seal the edges of the multi-layer structure to obtain the far infrared anion sanitary product.

[0104] The modified graphene is prepared by Preparation Example 1, and the composite polypropylene fiber is prepared by Preparation Example 8.

[0105] Example 2: A far infrared anion sanitary product, which differs from Example 1 in that the graphene composite material comprises the following components by weight: modified graphene 6 kg, composite polypropylene fiber 3 kg, guar gum 2 kg, sucrose monolaurate 3 kg, carboxymethyl cellulose 3 kg and deionized water 80 kg.

[0106] Example 3: A far infrared anion sanitary product, which differs from Example 1 in that the modified graphene is prepared by Preparation Example 2.

[0107] Example 4: A far infrared anion sanitary product, which differs from Example 1 in that the modified graphene is prepared by Preparation Example 3.

[0108] Example 5: A far infrared anion sanitary product, which differs from Example 1 in that the modified graphene is prepared by Preparation Example 4.

[0109] Example 6: A far infrared anion sanitary product, which differs from Example 1 in that the modified graphene is prepared by Preparation Example 5.

[0110] Example 7 A far infrared anion sanitary product, which is different from Example 1 in that the modified graphene is prepared according to Preparation Example 6.

[0111] Example 8 A far infrared anion sanitary product, which is different from Example 1 in that the modified graphene is prepared according to Preparation Example 7.

[0112] Example 9 A far infrared anion sanitary product, which is different from Example 1 in that the composite polypropylene fiber is prepared according to Preparation Example 9.

[0113] Example 10 A far infrared anion sanitary product, which is different from Example 9 in that the composite polypropylene fiber is prepared according to Preparation Example 10.

[0114] Example 11 A far infrared anion sanitary product, which is different from Example 9 in that the composite polypropylene fiber is prepared according to Preparation Example 11.

[0115] Example 12 A far infrared anion sanitary product, which is different from Example 9 in that the composite polypropylene fiber is prepared according to Preparation Example 12.

[0116] Example 13 A far infrared anion sanitary product, which is different from Example 9 in that the composite polypropylene fiber is prepared according to Preparation Example 13.

[0117] Example 14 A far infrared anion sanitary product, which is different from Example 9 in that the composite polypropylene fiber is prepared according to Preparation Example 14.

[0118] Comparative Example 1

[0119] A far infrared anion sanitary product, which is different from Example 1 in that no modified graphene is added.

[0120] Comparative Example 2

[0121] A far infrared anion sanitary product, which is different from Example 1 in that no composite polypropylene fiber is added.

[0122] Performance test test

[0123] The far infrared anion sanitary products prepared according to Examples 1-14 and Comparative Examples 1-2 are subjected to performance tests;

[0124] The absorption speed and the back penetration amount of the sanitary product are tested: 6 mL of standard synthetic liquid (0.9% physiological saline) is added in the middle of the sanitary product, and the time for the sample surface to be completely absorbed is recorded as the absorption speed / s; after waiting for 1.5 min, the weight of the filter paper is weighed and recorded, then the filter paper is covered on the position where the sample is soaked with physiological saline, and a 1.5 kg press block is used to press the filter paper for 1.5 min, the weight of the filter paper is weighed and recorded, and the increased weight of the filter paper is calculated as the back penetration amount.

[0125] The far infrared anion fiber was tested for breaking strength and elongation at break according to GB / T 14344-2022 "Chemical fiber filament tensile property test method", and the test results are shown in Table 1.

[0126] Table 1 Test data of examples and comparative examples:

[0127]

[0128] As can be seen from Table 1, the far infrared anion health care product prepared in Examples 1-2 has good mechanical properties, mechanical strength and absorbency. The breaking strength of Example 1 is 4.8 cN / dtex, the elongation at break is 275%, the absorption speed is 0.3 s, and the back permeation amount is 0.1 g. It can be seen that the health care product prepared in the present application has good strength, toughness and absorption speed, and the various components cooperate with each other to improve the mechanical properties of the far infrared anion health care product, so that the health care product has the functions of anion antibacterial, far infrared physiotherapy, absorption speed and leakage prevention.

[0129] The preparation methods of modified graphene in Examples 3-4 do not add modified pearl powder and sodium alginate respectively, and the mass ratio of graphene, modified pearl powder and sodium alginate is changed in Examples 5-6. As can be seen from Table 1, the test effects of breaking strength, elongation at break, absorption speed and back permeation amount of Examples 3-4 are obviously worse than those of Examples 1-2 and Example 5, and the corresponding performance test effect of Example 6 is better than that of Examples 3-4, but worse than that of Examples 1-2 and Example 5. It shows that sodium alginate forms ionic bonds with graphene hydroxyl and pearl powder Ca²⁺ through carboxylate, and constructs a three-dimensional network coating layer, so that the modified graphene has the functions of promoting blood circulation by far infrared, enhancing antibacterial and air purification by anion, improving the flexibility and mechanical properties of the composite material, and avoiding damage during use.

[0130] The preparation methods of modified pearl powder in Examples 7-8 do not add high molecular water-absorbing resin and nano silicon dioxide respectively. As can be seen from Table 1, the test effects of breaking strength, elongation at break, absorption speed and back permeation amount of Examples 7-8 are obviously worse than those of Examples 1-2, but better than those of Example 3. It shows that the high molecular water-absorbing resin has strong water absorption capacity, and after being mixed with pretreated pearl powder and nano silicon dioxide, the modified pearl powder can better synergize with the high molecular water-absorbing resin when absorbing water, thereby improving the mechanical properties of the system, and the surface silicon hydroxyl enhances the anion release capacity.

[0131] The preparation methods of the composite polypropylene fibers of Examples 9-10 do not add modified kaolin and xanthan gum solution respectively, the mass ratios of the polypropylene fibers, modified kaolin and xanthan gum solution are changed in Examples 11-12. As can be seen from Table 1, the test effects of breaking strength, elongation at break, absorption speed and back permeation amount of Examples 9-10 are obviously poorer than those of Examples 1-2 and Example 11, and the corresponding performance test effects of Example 12 are better than those of Examples 9-10 but poorer than those of Examples 1-2 and Example 11. It is shown that the xanthan gum solution makes the modified kaolin and the polypropylene fiber closely bonded, improves the absorption, leakage prevention, functional release (such as negative ions and far infrared) and mechanical properties of the composite polypropylene fiber, and improves the flexibility and tear resistance of the composite material, which is suitable for the production requirements of ultra-thin sanitary products.

[0132] The preparation methods of modified kaolin of Examples 13-14 do not add activated carbon powder and gum arabic respectively. As can be seen from Table 1, the test effects of breaking strength, elongation at break, absorption speed and back permeation amount of Examples 13-14 are obviously poorer than those of Examples 1-2 but better than those of Example 9. It is shown that the porous structure of activated carbon and the layered structure of kaolin form a multi-pore system, and the activated carbon is closely combined with kaolin through electrostatic attraction to prevent the activated carbon from falling off, and the gum arabic is adsorbed on the surface of the modified kaolin particles to form a protective film to wrap the activated carbon particles, further improving the amphiphilic surface, multi-pore structure and controlled release function of the kaolin.

[0133] Comparative Examples 1 and 2 do not add modified graphene and composite polypropylene fiber respectively. As can be seen from Table 1, the test effects of breaking strength, elongation at break, absorption speed and back permeation amount of Comparative Examples 1 and 2 are obviously poorer than those of Examples 1-2, which shows that the modified graphene enhances the far infrared emission performance, promotes local blood circulation and promotes the release of negative ions, and at the same time has the characteristics of antibacterial, heat conduction and mechanical properties; the composite polypropylene fiber provides mechanical support, and combines with the ES fiber to improve the strength, toughness and bulkiness of the layer structure.

[0134] The specific embodiments are only an explanation of the present application, which is not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A far infrared negative ion health product comprising a bamboo fiber non-woven fabric layer, an absorption layer, and a PLA leakage-proof layer, characterized in that, The absorption layer comprises a far-infrared anion fiber layer and an anion chip, and the far-infrared anion fiber layer is prepared from graphene composite material coated ES fiber; the graphene composite material comprises the following components: modified graphene, composite polypropylene fiber, guar gum, sucrose monolaurate, carboxymethyl cellulose and deionized water. The preparation method of the modified graphene comprises the following steps: (1) cut and disperse motherwort in deionized water, add sodium chloride, heat at a temperature of 90-95 DEG C for 3-4 h, filter to obtain a filtrate; (2) mix graphene, modified pearl powder and polyvinylpyrrolidone, wet grind to obtain a mixture; (3) disperse the mixture of step (2) in the filtrate of step (1), ultrasonic for 2-3 h, add sodium alginate, sodium dodecylbenzenesulfonate and Tween-80, stir at a temperature of 80-85 DEG C for 1-2 h, dry to obtain modified graphene; The preparation method of the composite polypropylene fiber comprises the following steps: (1) irradiate polypropylene fiber under ultraviolet light of 330-350 nm for 6-8 h, then disperse in ethanol solution, stir for 1-2 h, filter, dry to obtain treated polypropylene fiber; (2) disperse modified kaolin in deionized water, add treated polypropylene fiber of step (1), stir at a temperature of 60-65 DEG C for 1-2 h, filter, dry to obtain a mixture; (3) add the mixture to xanthan gum aqueous solution, dry, grind to obtain composite polypropylene fiber; The xanthan gum aqueous solution raw material comprises xanthan gum, acrylate emulsion and deionized water.

2. The far infrared negative ion sanitary product according to claim 1, characterized in that, The mass ratio of the graphene, modified pearl powder and sodium alginate is 1:0.2-0.3:0.04-0.

06.

3. The far infrared negative ion sanitary product according to claim 1, characterized in that, The preparation method of the modified pearl powder comprises the following steps: disperse pearl powder in deionized water, add sodium hydroxide and lauroyl lysine, ultrasonic at a temperature of 70-75 DEG C for 1-2 h, filter to obtain pretreated pearl powder; disperse high molecular water absorbing resin in deionized water, stir uniformly at 85-90 DEG C, add pretreated pearl powder and nano silicon dioxide, stir at 1000-1200 rpm for 50-55 min, add boric acid, continue to stir for 1-2 h, dry at 60-65 DEG C for 12-14 h, grind to obtain modified pearl powder.

4. The far infrared negative ion sanitary product according to claim 1, characterized in that, The mass ratio of the polypropylene fiber, modified kaolin and xanthan gum aqueous solution is 1:0.4-0.6:0.1-0.

2.

5. The far infrared negative ion sanitary product according to claim 1, characterized in that, The preparation method of the modified kaolin comprises the following steps: disperse kaolin in deionized water, add sodium hexametaphosphate and water glass, stir for 2-3 h, filter, grind to obtain kaolin with a particle size of 1-3 µm, disperse the kaolin in deionized water again, add cetyl ammonium bromide and activated carbon powder, ultrasonic for 3-4 h, add gum arabic, stir at a temperature of 65-70 DEG C for 20-30 min, dry to obtain modified kaolin.

6. The far infrared negative ion sanitary product according to claim 1, characterized in that, The anion chip raw material comprises nano calcium zeolite powder, tourmaline powder, nano silver and polyethylene.

7. The far infrared negative ion sanitary product according to claim 1, characterized in that, Modified graphene 5-6 parts, composite polypropylene fiber 3-4 parts, guar gum 2-3 parts, sucrose monolaurate 3-4 parts, carboxymethyl cellulose 2-3 parts, deionized water 70-80 parts.

8. The method for preparing a far-infrared negative ion hygiene product according to claim 1, characterized in that, It comprises the following steps: The negative ion chip is adhered on the far infrared negative ion fiber layer to obtain an absorption layer; The bamboo fiber non-woven fabric layer, the absorption layer and the PLA leakage-proof layer are stacked in sequence, the shape required by the sanitary napkin is cut, the edges of the multi-layer structure are sealed, and a far infrared negative ion sanitary product is obtained.

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