A sanitary napkin containing seaweed fiber material and its preparation method

Abstract

The present invention relates to a sanitary napkin containing seaweed fiber material and a preparation method thereof, belonging to the technical field of sanitary products. The sanitary napkin sequentially includes a surface layer, an anti-osmosis function layer, an absorbent core layer, an anti-osmosis function layer and a bottom film from top to bottom; the anti-osmosis function layer is a non-woven fabric prepared by cross-bonding seaweed fiber and cotton fiber, and one side of the non-woven fabric is sprayed with a water-repellent finishing agent; the water-repellent finishing agent includes waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water; the absorbent core layer includes cotton-like paper and a high-molecular absorbent, and a deodorizing and antibacterial powder is attached to the upper surface of the absorbent core. The sanitary napkin of the present invention adds an anti-osmosis function layer, uses a special water-repellent finishing agent to achieve good single-sided water repellency, prevents blood from seeping back, adds a deodorizing and antibacterial powder to ensure the antibacterial property of the sanitary napkin, and improves the safety and health of use.

Description

Technical Field

[0001] The present invention belongs to the technical field of sanitary products, and particularly relates to a sanitary napkin containing seaweed fiber material and a preparation method thereof. Background Art

[0002] A sanitary napkin is a product with a large absorption capacity, and its structure includes a water-permeable surface layer, an absorbent core, and a water-impermeable bottom film. The material of the absorbent core is generally cotton-like paper and a high-molecular absorbent; with the continuous improvement of usage requirements, a sanitary napkin not only needs to play the role of absorbing liquid, but also needs to have functions such as anti-leakage, ultra-thinness, anti-static, antibacterial, deodorizing, and degradability. In order to enrich and improve the usage efficacy of sanitary napkins, various efficacy components are often added in the absorbent core or on the upper layer of the absorbent core to achieve the efficacy.

[0003] However, the safety of sanitary napkins with various components on the current market is also uneven. Improper use of sanitary napkins or using inferior sanitary napkins will lead to the occurrence of gynecological diseases. This is mainly because the absorbent core uses recycled pulp and will add chemical treatment components, which cause harm to the body; in order to reduce the thickness, the amount of water-absorbing material is reduced, and the water absorption and water-locking ability are poor, which is easy to cause reverse osmosis or side leakage, breed bacteria, generate odors, itching, etc. on the skin surface, and the chemical harmful substances in the absorbent core seep out with reverse osmosis to harm the skin; and the continuous antibacterial effect of antibacterial materials is poor. Therefore, it is necessary to improve the anti-reverse osmosis ability and antibacterial ability to ensure the safety and comfort of use. Summary of the Invention

[0004] Aiming at the problems of pathogenic safety risks, poor anti-reverse osmosis property, and poor antibacterial property existing in the existing sanitary napkins, the present invention provides a sanitary napkin containing seaweed fiber material and a preparation method thereof, adding an anti-reverse osmosis functional layer, using a special water-repellent finishing agent to achieve good single-sided water repellency, preventing blood from seeping back, adding a deodorizing and antibacterial powder to ensure the antibacterial property of the sanitary napkin, and improving the safety and health of use. The specific technical solutions are as follows:

[0005] A sanitary napkin containing seaweed fiber material, from top to bottom, the sanitary napkin sequentially includes a surface layer, an anti-reverse osmosis functional layer, an absorbent core layer, an anti-reverse osmosis functional layer, and a bottom film;

[0006] The anti-reverse osmosis functional layer is a non-woven fabric prepared by interlacing and bonding seaweed fiber and cotton fiber, and one side of the non-woven fabric is sprayed with a water-repellent finishing agent; the mass components of the water-repellent finishing agent are: 4 parts to 6 parts of waterborne polyurethane, 1 part to 3 parts of waterborne carnauba wax emulsion, 0.05 part to 0.08 part of polydimethylsiloxane PEG-10-15 cross-linked polymer, and 100 parts to 120 parts of water;

[0007] The absorbent core layer includes cotton-like paper and a superabsorbent polymer. An odor-removing and bacteriostatic powder is attached to the upper surface of the absorbent core. The preparation method of the odor-removing and bacteriostatic powder is as follows: By mass ratio, pumpkin seed meat: osmanthus tree leaves: syngonium podophyllum leaves = (5 - 8):(1.5 - 3):(1 - 2.5). Mix pumpkin seed meat, osmanthus tree leaves and syngonium podophyllum leaves, and pulverize to obtain a mixture. Add water with a mass 6 to 8 times that of the mixture to the mixture, then add Bacillus coagulans, neutral protease and hemicellulase, and perform fermentation enzymolysis at 35°C - 40°C for 25h - 30h. Sterilize and inactivate enzymes at high temperature. After cooling to room temperature, filter through a 400 - 800 mesh sieve, take the filtrate, and spray dry to obtain the odor-removing and bacteriostatic powder.

[0008] In the above technical solution, the mass ratio of the components of the non-woven fabric is seaweed fiber: cotton fiber = (8 - 10):(4 - 6); the thickness of the non-woven fabric is 0.15mm - 0.2mm.

[0009] In the above technical solution, the mass ratio of the cotton-like paper and the superabsorbent polymer is cotton-like paper: superabsorbent polymer = (8 - 10):(2 - 4), and the thickness of the absorbent core layer is 1.mm - 1.5mm.

[0010] In the above technical solution, the addition amounts of Bacillus coagulans, neutral protease and hemicellulase are all 0.1% - 0.5% of the mass of the mixture; the temperature for high-temperature sterilization and enzyme inactivation is 100°C - 120°C, and the time is 20min - 30min.

[0011] In the above technical solution, the surface layer is a permeable fiber cloth, and the fiber cloth is a non-woven fiber cloth prepared by cross-bonding seaweed fiber, bamboo charcoal fiber and cotton fiber.

[0012] In the above technical solution, the mass ratio of seaweed fiber, bamboo charcoal fiber and cotton fiber is seaweed fiber: bamboo charcoal fiber: cotton fiber = (5 - 8):(0.5 - 1.5):(6 - 10); the thickness of the fiber cloth is 0.05mm - 0.1mm.

[0013] In the above technical solution, the bottom film is a degradable plastic film, and the material is PBS plastic, PBAT plastic or PLGA plastic.

[0014] The preparation method of the above sanitary napkin containing seaweed fiber material includes the following steps:

[0015] S1: By mass fraction, mix waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water evenly to prepare a water-repellent finishing agent; spray the water-repellent finishing agent on the lower surface of the non-woven fabric in a spray manner to ensure that the water-repellent finishing agent does not penetrate through the upper surface of the non-woven fabric. After drying, obtain an anti-osmosis function layer;

[0016] S2: Spray the odor-removing and bacteriostatic powder on the upper surface of the absorbent core layer, and then perform rolling so that the odor-removing and bacteriostatic powder is embedded in the upper layer of the absorbent core layer. Use an anti-osmosis functional layer to wrap the absorbent core layer with cotton. The side of the anti-osmosis functional layer with a water-repellent finishing agent faces the absorbent core layer to form a composite sheet of anti-osmosis functional layer-absorbent core layer-anti-osmosis functional layer;

[0017] S3: After sterilizing the surface layer, the composite sheet and the bottom film, prepare sanitary napkins.

[0018] In S1 of the above preparation method, the atomization fineness of the spray is nanoscale. Based on the non-woven fabric area of each sanitary napkin, the spray dosage of the water-repellent finishing agent is 0.006 mL to 0.008 mL.

[0019] In S2 of the above preparation method, for the dosage of the odor-removing and bacteriostatic powder, based on the area of the absorbent core layer of each sanitary napkin, the spraying amount is 0.1 g to 0.3 g.

[0020] In S4 of the above preparation method, the sterilization is ultraviolet irradiation sterilization.

[0021] A sanitary napkin containing seaweed fiber material and its preparation method provided by the present invention, compared with the prior art, has the following beneficial effects:

[0022] First, the sanitary napkin of the present invention is added with an anti-osmosis functional layer. The anti-osmosis functional layer is a non-woven fabric prepared by interlacing and bonding seaweed fiber and cotton fiber in a certain proportion. The content of seaweed fiber is greater than that of cotton fiber. One side of the non-woven fabric is sprayed with a water-repellent finishing agent. The mass composition of the designed water-repellent finishing agent is: 4 to 6 parts of waterborne polyurethane, 1 to 3 parts of waterborne carnauba wax emulsion, 0.05 to 0.08 parts of polydimethylsiloxane PEG-10-15 cross-linked polymer, and 100 to 120 parts of water. The combination of this water-repellent finishing agent and seaweed fiber can change the contact angle of the non-woven fabric against blood reverse osmosis and does not affect the positive penetration speed, having good reverse osmosis ability.

[0023] Second, the polydimethylsiloxane PEG-10-15 cross-linked polymer in the water-repellent finishing agent has the functions of film-forming, clouding, and surface activity. While forming a film, it can achieve good air permeability and improve positive permeability. The polydimethylsiloxane PEG-10-15 cross-linked polymer has the effect of improving the anti-osmosis ability by film-forming, and the clouding and surfactant characteristics can ensure that the positive penetration speed is not reduced.

[0024] III. The composition ratio of the water-repellent finishing agent has good fluidity, can achieve a nano-level spray fineness, avoid the generation of large-diameter droplets, prevent the spray coating of the non-woven fabric from penetrating through the upper surface, prevent the change of the penetration contact angle of the upper surface, and hinder the normal penetration of blood.

[0025] IV. Preparation of the odor-removing and bacteriostatic powder. Compared with the conventional ethanol aqueous solution extraction method, the present invention uses an extract obtained by fermenting and enzymatically hydrolyzing pumpkin seed meat, osmanthus tree leaves, and syngonium podophyllum leaves with bacillus coagulans, neutral protease, and hemicellulase, which contains fermentation products and enzymatically hydrolyzed small molecule bacteriostatic peptides, has a better bacteriostatic effect, can greatly improve the bacteriostasis of bacteria, and has better use safety. The syngonium podophyllum leaf component also has the effect of removing odors.

[0026] V. The surface layer is a permeable fiber cloth, which is a non-woven fiber cloth prepared by interlacing and bonding seaweed fiber, bamboo charcoal fiber, and cotton fiber. The ratio of seaweed fiber: bamboo charcoal fiber: cotton fiber = (5 - 8):(0.5 - 1.5):(6 - 10); it has good permeability.

[0027] VI. More than 90% of the raw materials used in the present invention can achieve rapid and good degradability and will not cause persistent pollution to the environment. Detailed implementation mode

[0028] The present invention will be further described below in conjunction with specific implementation cases, but the present invention is not limited to these embodiments.

[0029] Example 1

[0030] A sanitary napkin containing seaweed fiber material, which successively includes a surface layer, an anti-osmosis function layer, an absorption core layer, an anti-osmosis function layer, and a bottom film from top to bottom.

[0031] Among them, the anti-osmosis function layer is a non-woven fabric prepared by interlacing and bonding seaweed fiber and cotton fiber. The mass ratio of the components is seaweed fiber: cotton fiber = 9:5, and the thickness of the non-woven fabric is 0.18 mm; one side of the non-woven fabric is spray-coated with a water-repellent finishing agent; the mass components of the water-repellent finishing agent are: 5 parts of waterborne polyurethane, 2 parts of waterborne carnauba wax emulsion, 0.06 part of polydimethylsiloxane PEG-10-15 cross-linked polymer, and 110 parts of water.

[0032] Among them, the absorbent core layer includes cotton-like paper and a superabsorbent polymer. The mass ratio of the cotton-like paper to the superabsorbent polymer is cotton-like paper:superabsorbent polymer = 9:3.5, and the thickness of the absorbent core layer is 1.2 mm. An odor-removing and antibacterial powder is attached to the upper surface of the absorbent core. The preparation method of the odor-removing and antibacterial powder is as follows: by mass ratio, pumpkin seed meat:osmanthus tree leaves:syngonium leaves = 6:2.5:1.8. Mix pumpkin seed meat, osmanthus tree leaves and syngonium leaves, and crush them to obtain a mixture. Add water with a mass 7 times that of the mixture to the mixture, then add Bacillus coagulans, neutral protease and hemicellulase, and carry out fermentation enzymolysis at 37°C for 28 h. Sterilize and inactivate the enzymes at 110°C for 25 min. After cooling to room temperature, filter through a 500-mesh sieve, take the filtrate, and spray-dry it to obtain the odor-removing and antibacterial powder;

[0033] The addition amounts of Bacillus coagulans, neutral protease and hemicellulase are all 0.3% of the mass of the mixture; the viable count of Bacillus coagulans is 10 billion CFU / g; the enzyme activity of neutral protease is 20,000 U / g; the enzyme activity of hemicellulase is 100,000 U / g.

[0034] Among them, the surface layer is a permeable fiber cloth, and the fiber cloth is a non-woven fiber cloth prepared by cross-bonding seaweed fiber, bamboo charcoal fiber and cotton fiber. The mass ratio of seaweed fiber:bamboo charcoal fiber:cotton fiber = 6:0.8:9; the thickness of the fiber cloth is 0.08 mm.

[0035] Among them, the bottom film is a degradable plastic film, and the material is PBS plastic.

[0036] The preparation method of the above sanitary napkin containing seaweed fiber material includes the following steps:

[0037] S1: According to mass parts, mix waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water evenly to prepare a water-repellent finishing agent; spray the water-repellent finishing agent on the lower surface of the non-woven fabric in a spray manner to ensure that the water-repellent finishing agent does not penetrate through the upper surface of the non-woven fabric. After drying, obtain an anti-osmosis function layer;

[0038] The atomization fineness of the spray is nanoscale. Based on the non-woven fabric area of each sanitary napkin, the spray dosage of the water-repellent finishing agent is 0.007 mL.

[0039] S2: Sprinkle the odor-removing and antibacterial powder on the upper surface of the absorbent core layer, and then roll-press it to make the odor-removing and antibacterial powder embed in the upper layer of the absorbent core layer. Use the anti-osmosis function layer to wrap the absorbent core layer with cotton, and the side of the anti-osmosis function layer with the water-repellent finishing agent faces the absorbent core layer to form a composite sheet of anti-osmosis function layer-absorbent core layer-anti-osmosis function layer;

[0040] Based on the area of the absorbent core layer of each sanitary napkin, the spraying amount of the odor-removing and bacteriostatic powder is 0.2 g.

[0041] S3: After sterilizing the surface layer, composite sheet and bottom film by ultraviolet irradiation, prepare the sanitary napkin.

[0042] Example 2

[0043] A sanitary napkin containing seaweed fiber material, which from top to bottom includes a surface layer, an anti-osmosis function layer, an absorbent core layer, an anti-osmosis function layer and a bottom film in sequence.

[0044] Among them, the anti-osmosis function layer is a non-woven fabric prepared by interlacing and bonding seaweed fiber and cotton fiber, and the component mass ratio is seaweed fiber:cotton fiber = 8:4. The thickness of the non-woven fabric is 0.15 mm; one side of the non-woven fabric is sprayed with a water-repellent finishing agent; the mass component of the water-repellent finishing agent is: 4 parts of waterborne polyurethane, 1 part of waterborne carnauba wax emulsion, 0.05 part of polydimethylsiloxane PEG-10-15 cross-linked polymer and 100 parts of water.

[0045] Among them, the absorbent core layer includes cotton-like paper and a high-molecular absorbent. The mass ratio of cotton-like paper to the high-molecular absorbent is cotton-like paper:high-molecular absorbent = 8:2. The thickness of the absorbent core layer is 1.0 mm; an odor-removing and bacteriostatic powder is attached to the upper surface of the absorbent core. The preparation method of the odor-removing and bacteriostatic powder is: by mass ratio, pumpkin seed meat:osmanthus tree leaves:syngonium leaves = 5:1.5:1. Mix pumpkin seed meat, osmanthus tree leaves and syngonium leaves, and crush to obtain a mixture. Add 6 times the mass of water of the mixture to the mixture, then add Bacillus coagulans, neutral protease and hemicellulase, and carry out fermentation enzymolysis at 35 °C for 25 h, and carry out high-temperature sterilization and enzyme inactivation at 100 °C for 20 min. After cooling to room temperature, filter with a 600-mesh sieve, take the filtrate, and spray dry to obtain the odor-removing and bacteriostatic powder;

[0046] The addition amounts of Bacillus coagulans, neutral protease and hemicellulase are all 0.1% of the mass of the mixture; the viable count of Bacillus coagulans is 10 billion CFU / g; the enzyme activity of neutral protease is 20,000 U / g; the enzyme activity of hemicellulase is 100,000 U / g.

[0047] Among them, the surface layer is a permeable fiber cloth, and the fiber cloth is a non-woven fiber cloth prepared by interlacing and bonding seaweed fiber, bamboo charcoal fiber and cotton fiber. The mass ratio of seaweed fiber, bamboo charcoal fiber and cotton fiber is seaweed fiber:bamboo charcoal fiber:cotton fiber = 5:0.5:6; the thickness of the fiber cloth is 0.05 mm.

[0048] Among them, the bottom film is a degradable plastic film, and the material is PBAT plastic.

[0049] The preparation method of the above-mentioned sanitary napkin containing seaweed fiber material includes the following steps:

[0050] S1: Mix waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water evenly by mass parts to prepare a water-repellent finishing agent; spray the water-repellent finishing agent on the lower surface of the non-woven fabric in a spray manner, ensuring that the water-repellent finishing agent does not penetrate through the upper surface of the non-woven fabric. After drying, a reverse osmosis prevention functional layer is obtained.

[0051] The atomization fineness of the spray is at the nanometer level. Based on the area of the non-woven fabric of each sanitary napkin, the spray dosage of the water-repellent finishing agent is 0.006 mL.

[0052] S2: Sprinkle the odor-removing and bacteriostatic powder on the upper surface of the absorbent core layer, and then roll-press it so that the odor-removing and bacteriostatic powder is embedded in the upper layer of the absorbent core layer. Use the reverse osmosis prevention functional layer to wrap the absorbent core layer with cotton. The side of the reverse osmosis prevention functional layer with the water-repellent finishing agent faces the absorbent core layer to form a composite sheet of reverse osmosis prevention functional layer-absorbent core layer-reverse osmosis prevention functional layer.

[0053] Based on the area of the absorbent core layer of each sanitary napkin, the spraying dosage of the odor-removing and bacteriostatic powder is 0.1 g.

[0054] S3: After sterilizing the surface layer, composite sheet and bottom film by ultraviolet irradiation, a sanitary napkin is prepared.

[0055] Example 3

[0056] A sanitary napkin containing seaweed fiber material, which sequentially includes a surface layer, a reverse osmosis prevention functional layer, an absorbent core layer, a reverse osmosis prevention functional layer and a bottom film from top to bottom.

[0057] Among them, the reverse osmosis prevention functional layer is a non-woven fabric prepared by interlacing and bonding seaweed fibers and cotton fibers. The mass ratio of the components is seaweed fiber:cotton fiber = 8:6, and the thickness of the non-woven fabric is 0.15 mm; one side of the non-woven fabric is sprayed with a water-repellent finishing agent; the mass components of the water-repellent finishing agent are: 6 parts of waterborne polyurethane, 1 part of waterborne carnauba wax emulsion, 0.08 part of polydimethylsiloxane PEG-10-15 cross-linked polymer and 100 parts of water.

[0058] Among them, the absorbent core layer includes cotton-like paper and a superabsorbent polymer. The mass ratio of the cotton-like paper to the superabsorbent polymer is cotton-like paper:superabsorbent polymer = 10:2, and the thickness of the absorbent core layer is 1.2 mm. An odor-removing and antibacterial powder is attached to the upper surface of the absorbent core. The preparation method of the odor-removing and antibacterial powder is as follows: By mass ratio, pumpkin seed meat:osmanthus tree leaves:syngonium leaves = 5:3:1. Mix pumpkin seed meat, osmanthus tree leaves and syngonium leaves, and crush them to obtain a mixture. Add water with a mass 8 times that of the mixture to the mixture, then add Bacillus coagulans, neutral protease and hemicellulase, and carry out fermentation enzymolysis at 35°C for 30 h. Sterilize and inactivate the enzymes at 100°C for 30 min. After cooling to room temperature, filter through a 400-mesh sieve, take the filtrate, and spray-dry it to obtain the odor-removing and antibacterial powder;

[0059] The addition amounts of Bacillus coagulans, neutral protease and hemicellulase are all 0.1% of the mass of the mixture; the viable count of Bacillus coagulans is 10 billion CFU / g; the enzyme activity of neutral protease is 20,000 U / g; the enzyme activity of hemicellulase is 100,000 U / g.

[0060] Among them, the surface layer is a permeable fiber cloth, which is a non-woven fiber cloth prepared by cross-bonding seaweed fiber, bamboo charcoal fiber and cotton fiber. The mass ratio of seaweed fiber:bamboo charcoal fiber:cotton fiber = 8:0.5:10; the thickness of the fiber cloth is 0.05 mm.

[0061] Among them, the bottom film is a degradable plastic film, and the material is PLGA plastic.

[0062] The preparation method of the above sanitary napkin containing seaweed fiber material includes the following steps:

[0063] S1: By mass fraction, mix waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water evenly to prepare a water-repellent finishing agent; spray the water-repellent finishing agent on the lower surface of the non-woven fabric in a spray manner, ensure that the water-repellent finishing agent does not penetrate through the upper surface of the non-woven fabric, and after drying, obtain an anti-osmosis function layer;

[0064] The atomization fineness of the spray is nanoscale, and based on the non-woven fabric area of each sanitary napkin, the spray dosage of the water-repellent finishing agent is 0.008 mL.

[0065] S2: Sprinkle the odor-removing and antibacterial powder on the upper surface of the absorbent core layer, and then roll-press it so that the odor-removing and antibacterial powder is embedded in the upper layer of the absorbent core layer. Use the anti-osmosis function layer to wrap the absorbent core layer with cotton, and the side of the anti-osmosis function layer with the water-repellent finishing agent faces the absorbent core layer to form a composite sheet of anti-osmosis function layer-absorbent core layer-anti-osmosis function layer;

[0066] Based on the area of the absorbent core layer of each sanitary napkin, the spraying amount of the odor-removing and bacteriostatic powder is 0.1 g.

[0067] S3: After sterilizing the surface layer, composite sheet and bottom film by ultraviolet irradiation, prepare the sanitary napkin.

[0068] Example 4

[0069] A sanitary napkin containing seaweed fiber material, which sequentially includes a surface layer, an anti-osmosis functional layer, an absorbent core layer, an anti-osmosis functional layer and a bottom film from top to bottom.

[0070] Among them, the anti-osmosis functional layer is a non-woven fabric prepared by interlacing and bonding seaweed fiber and cotton fiber, and the component mass ratio is seaweed fiber:cotton fiber = 10:6. The thickness of the non-woven fabric is 0.2 mm; one side of the non-woven fabric is sprayed with a water-repellent finishing agent; the mass components of the water-repellent finishing agent are: 6 parts of waterborne polyurethane, 3 parts of waterborne carnauba wax emulsion, 0.08 part of polydimethylsiloxane PEG-10-15 cross-linked polymer and 120 parts of water.

[0071] Among them, the absorbent core layer includes cotton-like paper and a high-molecular absorbent. The mass ratio of cotton-like paper to high-molecular absorbent is cotton-like paper:high-molecular absorbent = 10:4. The thickness of the absorbent core layer is 1.5 mm; an odor-removing and bacteriostatic powder is attached to the upper surface of the absorbent core. The preparation method of the odor-removing and bacteriostatic powder is as follows: according to the mass ratio, pumpkin seed meat:osmanthus tree leaves:syngonium leaves = 8:3:2.5. Mix pumpkin seed meat, osmanthus tree leaves and syngonium leaves, and crush to obtain a mixture. Add 8 times the mass of water of the mixture to the mixture, and then add Bacillus coagulans, neutral protease and hemicellulase, and ferment and enzymolyze at 40 °C for 30 h. Sterilize and inactivate the enzyme at 120 °C for 30 min. After cooling to room temperature, filter with an 800-mesh sieve, take the filtrate, and spray dry to obtain the odor-removing and bacteriostatic powder;

[0072] The addition amounts of Bacillus coagulans, neutral protease and hemicellulase are all 0.5% of the mass of the mixture; the viable count of Bacillus coagulans is 10 billion CFU / g; the enzyme activity of neutral protease is 20,000 U / g; the enzyme activity of hemicellulase is 100,000 U / g.

[0073] Among them, the surface layer is a permeable fiber cloth, and the fiber cloth is a non-woven fiber cloth prepared by interlacing and bonding seaweed fiber, bamboo charcoal fiber and cotton fiber. The mass ratio of seaweed fiber, bamboo charcoal fiber and cotton fiber is seaweed fiber:bamboo charcoal fiber:cotton fiber = 8:1.5:10; the thickness of the fiber cloth is 0.1 mm.

[0074] Among them, the bottom film is a degradable plastic film, and the material is PBS plastic.

[0075] The preparation method of the above-mentioned sanitary napkin containing seaweed fiber material includes the following steps:

[0076] S1: Mix waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water evenly by mass parts to prepare a water repellent finishing agent; spray the water repellent finishing agent on the lower surface of the non-woven fabric in a spray manner, ensuring that the water repellent finishing agent does not penetrate through the upper surface of the non-woven fabric. After drying, a reverse osmosis prevention functional layer is obtained.

[0077] The atomization fineness of the spray is nanoscale. Based on the area of the non-woven fabric of each sanitary napkin, the spray dosage of the water repellent finishing agent is 0.008 mL.

[0078] S2: Sprinkle the odor-removing and bacteriostatic powder on the upper surface of the absorbent core layer, and then roll-press it so that the odor-removing and bacteriostatic powder is embedded in the upper layer of the absorbent core layer. Use the reverse osmosis prevention functional layer to wrap the absorbent core layer with cotton. The side of the reverse osmosis prevention functional layer with the water repellent finishing agent faces the absorbent core layer to form a composite sheet of reverse osmosis prevention functional layer-absorbent core layer-reverse osmosis prevention functional layer.

[0079] Based on the area of the absorbent core layer of each sanitary napkin, the spraying dosage of the odor-removing and bacteriostatic powder is 0.3 g.

[0080] S3: After sterilizing the surface layer, the composite sheet and the bottom film by ultraviolet irradiation, a sanitary napkin is prepared.

[0081] Example 5

[0082] A sanitary napkin containing seaweed fiber material, which successively includes a surface layer, a reverse osmosis prevention functional layer, an absorbent core layer, a reverse osmosis prevention functional layer and a bottom film from top to bottom.

[0083] Among them, the reverse osmosis prevention functional layer is a non-woven fabric prepared by interlacing and bonding seaweed fiber and cotton fiber. The component mass ratio is seaweed fiber:cotton fiber = 10:4, and the thickness of the non-woven fabric is 0.2 mm; one side of the non-woven fabric is sprayed with a water repellent finishing agent; the mass components of the water repellent finishing agent are: 4 parts of waterborne polyurethane, 3 parts of waterborne carnauba wax emulsion, 0.05 part of polydimethylsiloxane PEG-10-15 cross-linked polymer and 120 parts of water.

[0084] Among them, the absorbent core layer includes cotton-like paper and a superabsorbent polymer. The mass ratio of the cotton-like paper to the superabsorbent polymer is cotton-like paper:superabsorbent polymer = 8:4, and the thickness of the absorbent core layer is 1.2 mm. An odor-removing and bacteriostatic powder is attached to the upper surface of the absorbent core. The preparation method of the odor-removing and bacteriostatic powder is as follows: By mass ratio, pumpkin seed meat:osmanthus tree leaves:syngonium leaves = 8:1.5:2.5. Mix pumpkin seed meat, osmanthus tree leaves and syngonium leaves, and pulverize to obtain a mixture. Add water with a mass 6 times that of the mixture to the mixture, then add Bacillus coagulans, neutral protease and hemicellulase, and carry out fermentation enzymolysis at 40 °C for 25 h. Sterilize and inactivate the enzymes at 120 °C for 20 min. After cooling to room temperature, filter through a 500-mesh sieve, take the filtrate, and spray dry to obtain the odor-removing and bacteriostatic powder;

[0085] The addition amounts of Bacillus coagulans, neutral protease and hemicellulase are all 0.5% of the mass of the mixture; the viable count of Bacillus coagulans is 10 billion CFU / g; the enzyme activity of neutral protease is 20,000 U / g; the enzyme activity of hemicellulase is 100,000 U / g.

[0086] Among them, the surface layer is a permeable fiber cloth, which is a non-woven fiber cloth prepared by cross-bonding seaweed fiber, bamboo charcoal fiber and cotton fiber. The mass ratio of seaweed fiber:bamboo charcoal fiber:cotton fiber = 5:1.5:6; the thickness of the fiber cloth is 0.1 mm.

[0087] Among them, the bottom film is a degradable plastic film, and the material is PBAT.

[0088] The preparation method of the above sanitary napkin containing seaweed fiber material includes the following steps:

[0089] S1: According to the mass parts, mix waterborne polyurethane, waterborne carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water evenly to prepare a water-repellent finishing agent; spray the water-repellent finishing agent on the lower surface of the non-woven fabric in a spray manner to ensure that the water-repellent finishing agent does not penetrate through the upper surface of the non-woven fabric. After drying, obtain an anti-osmosis function layer;

[0090] The atomization fineness of the spray is nanoscale. Based on the non-woven fabric area of each sanitary napkin, the spray dosage of the water-repellent finishing agent is 0.006 mL.

[0091] S2: Sprinkle the odor-removing and bacteriostatic powder on the upper surface of the absorbent core layer, and then roll-press it so that the odor-removing and bacteriostatic powder is embedded in the upper layer of the absorbent core layer. Use the anti-osmosis function layer to wrap the absorbent core layer with cotton. The side of the anti-osmosis function layer with the water-repellent finishing agent faces the absorbent core layer to form a composite sheet of anti-osmosis function layer-absorbent core layer-anti-osmosis function layer;

[0092] Based on the area of the absorbent core layer of each sanitary napkin, the spraying amount of the odor-removing and bacteriostatic powder is 0.3 g.

[0093] S3: After sterilizing the surface layer, composite sheet and bottom film by ultraviolet irradiation, a sanitary napkin is prepared.

[0094] Comparative Example 1

[0095] The sanitary napkin does not have an anti-osmosis function layer, and other parameters and methods are the same as those in Example 1.

[0096] Comparative Example 2

[0097] The lower surface of the anti-osmosis function layer is not sprayed with a water-repellent finishing agent, and other parameters and methods are the same as those in Example 1.

[0098] Comparative Example 3

[0099] The preparation method of the odor-removing and bacteriostatic powder is as follows: by mass ratio, pumpkin seed meat: osmanthus tree leaves: syngonium leaves

[0100] = 6: 2.5: 1.8. Mix pumpkin seed meat, osmanthus tree leaves and syngonium leaves, crush them to obtain a mixture, soak the mixture with an ethanol aqueous solution with 7 times the mass, the ethanol aqueous solution contains 40 v / v% ethanol, after soaking for 6 h, filter with a 500-mesh sieve, take the filtrate, and spray-dry it to obtain the odor-removing and bacteriostatic powder; other parameters and methods are the same as those in Example 1.

[0101] Comparative Example 4

[0102] The water-repellent finishing agent does not contain polydimethylsiloxane PEG-10-15 cross-linked polymer, and other parameters and methods are the same as those in Example 1.

[0103] I. Conduct absorption and anti-osmosis experiment tests on the sanitary napkins of the above-mentioned examples and the sanitary napkins of the comparative examples: The length of the sanitary napkin is 240 mm, the width is 80 mm, 100 mL of animal blood is immersed in the sanitary napkin, and then a tissue paper is laid on the upper surface of the sanitary napkin, and a 2-kg heavy object is pressed on the tissue paper for 1 min to observe the absorption situation and the situation of the tissue paper being stained with blood. Three parallel samples are made for each, and the test results are shown in Table 1 below:

[0104] Table 1 Test results of anti-osmosis experiment

[0105]

[0106] Absorption speed scoring standard: 1 - instantaneous absorption with no residue, 2 - all absorbed in 3 s to 5 s, 3 - all absorbed in more than 5 s, 4 - not all absorbed in more than 5 s, with residue.

[0107] Anti - reverse osmosis scoring criteria: 0 - no blood stain contamination, 1 - slightly contaminated with blood stains (blood stain area less than 20%), 2 - mildly contaminated with blood stains (blood stain area between 20% and 40%), 3 - moderately contaminated with blood stains (blood stain area between 40% and 60%), 4 - severely contaminated with blood stains (blood stain area between 60% and 80%), 5 - extremely severely contaminated with blood stains (blood stain area above 80%).

[0108] From the above test results, it can be seen that the anti - reverse osmosis functional layer has good blood reverse osmosis property, can achieve zero reverse osmosis, and does not affect the positive absorption rate of blood. Polydimethylsiloxane PEG - 10 - 15 cross - linked polymer has the effect of improving the anti - reverse osmosis ability and can increase the forward osmosis rate.

[0109] Second, conduct antibacterial experiments on the odor - removing and bacteriostatic powders of the above - mentioned examples and the odor - removing and bacteriostatic powder of Comparative Example 3: The test bacteria are Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Actinobacillus actinomycetemcomitans; inoculate the bacteria in the solid medium, inoculate the odor - removing and bacteriostatic powder in the middle of the medium, after culturing for 48 h, observe the diameter of the antibacterial circle, and make 3 specimens for each type. The average diameter results of the antibacterial circles are shown in Table 2 below:

[0110] Table 2 Average diameter of antibacterial circle (mm)

[0111]

[0112] From the above results, it can be seen that compared with the conventional ethanol aqueous solution extraction method of Comparative Example 3, the extracts obtained by fermenting and enzymatically hydrolyzing the pumpkin seed meat, osmanthus tree leaves, and syngonium leaves of each example with Bacillus coagulans, neutral protease, and hemicellulase contain fermentation products and enzymatically hydrolyzed small - molecule antibacterial peptides, have better antibacterial effects, can significantly improve the antibacterial property of bacteria, and have better use safety.

Claims

1. A sanitary napkin containing seaweed fiber material, characterized in that: From top to bottom, it includes a surface layer, an anti-reverse osmosis functional layer, an absorbent core layer, an anti-reverse osmosis functional layer and a bottom film; The anti-reverse osmosis functional layer is a non-woven fabric prepared by interlacing and bonding seaweed fibers and cotton fibers, and one side of the non-woven fabric is sprayed with a water-repellent finishing agent; the water-repellent finishing agent comprises: 4 to 6 parts of aqueous polyurethane, 1 to 3 parts of aqueous carnauba wax emulsion, 0.05 to 0.08 parts of polydimethylsiloxane PEG-10-15 cross-linked polymer and 100 to 120 parts of water; The absorbent core layer comprises cotton paper and a polymer absorbent, and the upper surface of the absorbent core is attached with deodorizing and antibacterial powder. The preparation method of the deodorizing and antibacterial powder is as follows: pumpkin seed pulp: osmanthus fragrans leaves: syngonium leaves = (5-8): (1.5-3): (1-2.5) are mixed and crushed according to a mass ratio to obtain a mixture, and water of 6 to 8 times the mass of the mixture is added, and Bacillus coagulans, neutral protease and hemicellulase are added, and the Bacillus coagulans, neutral protease and hemicellulase are all 0.1% to 0.5% of the mass of the mixture, fermented and enzymolyzed at 35°C to 40°C for 25h to 30h, sterilized and inactivated by high temperature, cooled to room temperature, filtered through a 400-mesh to 800-mesh sieve, and the filtrate is spray-dried to obtain the deodorizing and antibacterial powder; The sanitary napkin preparation method comprises: S1: Mix water-based polyurethane, water-based carnauba wax emulsion, polydimethylsiloxane PEG-10-15 cross-linked polymer and water in parts by mass to prepare a water-repellent finishing agent; spray the water-repellent finishing agent on the lower surface of the non-woven fabric in a spraying manner, the atomization fineness of the spray is nanometer level, and the spray amount of the water-repellent finishing agent is 0.006mL~0.008mL based on the non-woven fabric area of ​​each sanitary napkin, to ensure that the water-repellent finishing agent does not penetrate through the upper surface of the non-woven fabric, and after drying, an anti-reverse osmosis functional layer is obtained; S2: spraying the deodorizing and antibacterial powder on the upper surface of the absorbent core layer, rolling the deodorizing and antibacterial powder to embed the deodorizing and antibacterial powder in the upper layer of the absorbent core layer, and using the anti-reverse osmosis functional layer to wrap the absorbent core layer with a cotton core, with the side of the anti-reverse osmosis functional layer having the water-repellent finishing agent facing the absorbent core layer, to form a composite sheet of the anti-reverse osmosis functional layer-absorbent core layer-anti-reverse osmosis functional layer; S3: After sterilizing the surface layer, the composite sheet and the bottom film, a sanitary napkin is prepared.

2. A sanitary napkin containing seaweed fiber material according to claim 1, characterized in that: The mass ratio of the components of the non-woven fabric is seaweed fiber:cotton fiber=(8-10):(4-6); the thickness of the non-woven fabric is 0.15mm-0.2mm.

3. A sanitary napkin containing seaweed fiber material according to claim 1, characterized in that: The mass ratio of the cotton-like paper to the polymer absorbent is cotton-like paper: polymer absorbent = (8-10): (2-4), and the thickness of the absorbent core layer is 1.mm-1.5mm.

4. A sanitary napkin containing seaweed fiber material according to claim 1, characterized in that: The temperature of the high temperature sterilization and enzyme inactivation is 100° C. to 120° C., and the time is 20 min to 30 min.

5. A sanitary napkin containing seaweed fiber material according to claim 1, 2, 3 or 4, characterized in that: The surface layer is a permeable fiber cloth, and the fiber cloth is a non-woven fiber cloth prepared by interlacing and bonding seaweed fiber, bamboo charcoal fiber and cotton fiber.

6. A sanitary napkin containing seaweed fiber material according to claim 5, characterized in that: The mass ratio of the seaweed fiber, bamboo charcoal fiber and cotton fiber is seaweed fiber: bamboo charcoal fiber: cotton fiber = (5-8): (0.5-1.5): (6-10); the thickness of the fiber cloth is 0.05 mm to 0.1 mm.

7. A sanitary napkin containing seaweed fiber material according to claim 1, characterized in that: The base film is a degradable plastic film, and the material is PBS plastic, PBAT plastic or PLGA plastic.

8. The sanitary napkin containing seaweed fiber material according to claim 1, characterized in that: In S2, the amount of the deodorizing and antibacterial powder used is 0.1 g to 0.3 g, based on the area of ​​the absorbent core layer of each sanitary napkin.

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