Novel liquid sanitary towel

Abstract

The invention discloses a novel liquid sanitary napkin, which relates to the technical field of hygienic products and is characterized in that an inner core of the novel liquid sanitary napkin contains a composite liquid material; the composite liquid material is formed by liquefying purified water, modified nano attapulgite and a composite-based nano molecular polymer; the composite liquid material is used as an adsorption core of a sanitary towel, the surface layer of the manufactured sanitary towel is very light and thin, the sanitary towel has excellent air permeability, a female can keep a comfortable state for a long time in the menstrual period using process, and then the emotion of the female in the menstrual period is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sanitary products, in particular to a new type of liquid sanitary napkin. Background Art

[0002] In women's daily life, sanitary napkins are an indispensable part of modern women's daily life, and their importance is self-evident. It is not only a sanitary product, but also an important tool for women to maintain comfort, cleanliness and confidence during menstruation.

[0003] The primary function of sanitary napkins is to absorb blood and other secretions during women's menstruation, thereby preventing these liquids from overflowing and staining clothes or the body.

[0004] In addition to its absorption function, sanitary napkins can also effectively prevent the growth and spread of bacteria. During menstruation, women's private parts are vulnerable to bacterial invasion, and the material and design of sanitary napkins can effectively isolate bacteria and reduce the risk of infection.

[0005] However, with the advancement of technology and the changing needs of consumers, traditional sanitary napkins can no longer meet the needs of all women.

[0006] Liquid sanitary napkins are not "liquid" products in the literal sense, but refer to the use of a special absorbent material inside them - FlexFoamTM. This material is liquefied from pure water and nanomolecular polymers through emulsification technology, and has a porous form similar to memory foam. Compared with the cotton fibers used in traditional sanitary napkins, liquid sanitary napkins have stronger absorption performance, fit the body curve better, and never deform.

[0007] However, the liquid absorption efficiency of existing liquid sanitary napkins is relatively average, and after being fully absorbed, they are prone to back-seepage.

[0008] Based on this, a new liquid sanitary napkin is provided to solve the existing technical problems. Summary of the invention

[0009] The purpose of the present invention is to provide a new type of liquid sanitary napkin to solve the deficiencies in the prior art.

[0010] The technical solution adopted by the present invention is as follows:

[0011] A novel liquid sanitary napkin, wherein the inner core of the novel liquid sanitary napkin contains a composite liquid material;

[0012] The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

[0013] As a further technical solution: the preparation method of the modified nano-attapulgite is:

[0014] First, lemon, purslane and sophora flavescens are added into a blender in sequence, and then distilled water is added, and blending is performed to obtain a mixed slurry;

[0015] Among them, the beating speed is 1200r / min;

[0016] The beating time is 20min;

[0017] Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was collected;

[0018] The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion;

[0019] The pH of the dispersion was adjusted to 7.0, and then the temperature was adjusted to 80° C., and the dispersion was stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite.

[0020] As a further technical solution: the mixing ratio of the lemon, purslane, sophora flavescens, and distilled water is 4-5g: 1-2g: 1-2g: 300mL;

[0021] The mass ratio of the mixed slurry to anhydrous ethanol is 5:3;

[0022] The mixing ratio of the nano-attapulgite and the filtrate is 25-30 g:150 mL.

[0023] As a further technical solution: the pH is adjusted using sodium hydroxide solution or hydrochloric acid solution;

[0024] Wherein, the concentration of sodium hydroxide solution is 1 mol / L;

[0025] The concentration of hydrochloric acid solution is 0.5 mol / L.

[0026] As a further technical solution: the preparation method of the composite-based nanomolecular polymer is:

[0027] First, acrylic acid and sodium hydroxide are added to deionized water in sequence, stirred and mixed for 15-20 minutes at room temperature, and then acrylamide is added and stirred for 40 minutes to obtain a first intermediate solution;

[0028] The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of inert gas, the initiator solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules;

[0029] The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

[0030] As a further technical solution: acrylic acid, sodium hydroxide, and deionized water are mixed in a ratio of 18 mL: 6 g: 60 mL;

[0031] The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL;

[0032] The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180mL: 1-1.8g;

[0033] The initiator solution is an ammonium persulfate solution;

[0034] The mass fraction of the ammonium persulfate solution is 5%;

[0035] Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:10.

[0036] As a further technical solution: the preparation method of the modified nano-silicon dioxide is:

[0037] Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%;

[0038] Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, and cool to room temperature to obtain modified nano-silica;

[0039] The mass ratio of sodium dodecylbenzenesulfonate to vinyltriethoxysilane is 1:3-4;

[0040] Wherein, the volume ratio of saturated ammonia water and sodium dodecylbenzene sulfonate solution is 1:1;

[0041] The centrifugal speed is 8000r / min.

[0042] As a further technical solution: the inert gas is nitrogen;

[0043] The vacuum drying temperature was 60°C and the time was 10 hours.

[0044] As a further technical solution, the preparation method of the composite liquid material is:

[0045] S1. The purified water and the modified nano-attapulgite were mixed uniformly in a mass ratio of 10:1-2, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion;

[0046] S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material;

[0047] The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100mL: 40-50g;

[0048] S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material.

[0049] As a further technical solution, the low-temperature drying temperature is 50-55°C.

[0050] Beneficial effects:

[0051] The composite liquid material of the present invention is used as the adsorption core of the sanitary napkin, and the surface layer of the manufactured sanitary napkin is very light and thin, and has excellent air permeability. Women can maintain a comfortable state for a long time during menstruation, thereby improving women's mood during menstruation.

[0052] The present invention has significantly optimized the components, and the composite liquid material produced can quickly absorb menstrual blood and evenly disperse it, ensuring that the blood will not accumulate on the surface, thereby reducing the risk of side leakage. Due to its fast liquid absorption rate, it can quickly absorb menstrual blood, so that the surface of the liquid sanitary napkin always remains in a relatively dry state, providing a comfortable experience for the user.

[0053] The composite liquid material prepared by the present invention contains a large number of hydrophilic groups on its molecular chain, including carboxylic acid groups, sulfonic acid groups, etc. Through a large number of hydrophilic groups, the composite liquid material can achieve high water absorption performance. When it comes into contact with menstrual blood, the hydrophilic groups on the molecular chains in the material will quickly interact with the menstrual blood to form hydrogen bonds, thereby quickly adsorbing it and firmly combining it with the material, thereby achieving rapid and stable absorption of menstrual blood.

[0054] In order to further improve the water absorption and water absorption stability of the composite liquid material, the present invention introduces acrylamide and modified nano-attapulgite in the process of preparing the composite liquid material, so that a large number of pores and channels exist inside the composite liquid material prepared by the present invention. These pores and channels can accommodate more liquid and can also facilitate the liquid to spread inside, so that the liquid can be absorbed evenly. After the composite liquid material absorbs the liquid, a certain expansion effect will occur, thereby expanding the pores and channels, further improving the liquid absorption of the composite liquid material.

[0055] By introducing modified nano-silica, stable connection points are formed inside the polymer. It not only has water-absorbing groups itself, but also can form a three-dimensional network structure by chemical bonds with the polymer molecular chains. This structure can increase the overall strength and stability of the composite liquid material, and can greatly improve the back-permeability performance of the composite liquid material. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a bar graph of the water absorption rate of the sample. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Example 1

[0059] A novel liquid sanitary napkin, wherein the inner core of the novel liquid sanitary napkin contains a composite liquid material;

[0060] The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

[0061] The preparation method of the composite liquid material is as follows:

[0062] S1. The purified water and the modified nano-attapulgite were uniformly mixed in a mass ratio of 10:1, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion;

[0063] S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material;

[0064] The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100 mL: 40 g;

[0065] S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material; the low temperature drying temperature is 50°C.

[0066] The preparation method of modified nano-attapulgite is as follows:

[0067] First, lemon, purslane, and sophora flavescens are added to a blender in sequence, and then distilled water is added, and a mixed slurry is obtained after beating; the mixing ratio of lemon, purslane, sophora flavescens, and distilled water is 4g:1g:1g:300mL;

[0068] Among them, the beating speed is 1200r / min;

[0069] The beating time is 20min;

[0070] Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was taken; the mass ratio of the mixed slurry to the anhydrous ethanol was 5:3;

[0071] The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion;

[0072] The pH of the dispersion is adjusted to 7.0 using a sodium hydroxide solution or a hydrochloric acid solution, and then the temperature is adjusted to 80° C., and the dispersion is stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite; wherein the concentration of the sodium hydroxide solution is 1 mol / L;

[0073] The concentration of the hydrochloric acid solution is 0.5 mol / L; the mixing ratio of nano-attapulgite and filtrate is 25g:150mL.

[0074] The preparation method of composite-based nano-molecular polymer is as follows:

[0075] First, acrylic acid and sodium hydroxide are added to deionized water in sequence, stirred and mixed for 15 minutes at room temperature, and then acrylamide is added and stirred for 40 minutes to obtain a first intermediate solution;

[0076] The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of nitrogen, a 5% ammonium persulfate solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules;

[0077] The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

[0078] The mixing ratio of acrylic acid, sodium hydroxide, and deionized water is 18mL:6g:60mL;

[0079] The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL;

[0080] The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180mL:1g;

[0081] Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:10.

[0082] The preparation method of modified nano-silicon dioxide is:

[0083] Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%;

[0084] Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, cool to room temperature, and obtain modified nano-silica; the mass ratio of sodium dodecylbenzene sulfonate to vinyl triethoxysilane is 1:3; wherein, the volume ratio of saturated ammonia water to sodium dodecylbenzene sulfonate solution is 1:1.

[0085] The centrifugal speed is 8000 r / min; the vacuum drying temperature is 60°C and the time is 10 hours.

[0086] Example 2

[0087] A novel liquid sanitary napkin, wherein the inner core of the novel liquid sanitary napkin contains a composite liquid material;

[0088] The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

[0089] The preparation method of the composite liquid material is as follows:

[0090] S1. The purified water and the modified nano-attapulgite were mixed uniformly in a mass ratio of 10:1.2, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion;

[0091] S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material;

[0092] The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100 mL: 44 g;

[0093] S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material; the low temperature drying temperature is 50°C.

[0094] The preparation method of modified nano-attapulgite is as follows:

[0095] First, lemon, purslane, and sophora flavescens are added to a blender in sequence, and then distilled water is added, and a mixed slurry is obtained after beating; the mixing ratio of lemon, purslane, sophora flavescens, and distilled water is 4.4:1.5g:1.5g:300mL;

[0096] Among them, the beating speed is 1200r / min;

[0097] The beating time is 20min;

[0098] Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was taken; the mass ratio of the mixed slurry to the anhydrous ethanol was 5:3;

[0099] The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion;

[0100] The pH of the dispersion is adjusted to 7.0 using a sodium hydroxide solution or a hydrochloric acid solution, and then the temperature is adjusted to 80° C., and the dispersion is stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite; wherein the concentration of the sodium hydroxide solution is 1 mol / L;

[0101] The concentration of the hydrochloric acid solution is 0.5 mol / L; the mixing ratio of nano-attapulgite and filtrate is 28 g:150 mL.

[0102] The preparation method of composite-based nano-molecular polymer is as follows:

[0103] First, acrylic acid and sodium hydroxide are added to deionized water in sequence, stirred and mixed for 15-20 minutes at room temperature, and then acrylamide is added and stirred for 40 minutes to obtain a first intermediate solution;

[0104] The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of nitrogen, a 5% ammonium persulfate solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules;

[0105] The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

[0106] The mixing ratio of acrylic acid, sodium hydroxide, and deionized water is 18mL:6g:60mL;

[0107] The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL;

[0108] The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180 mL: 1.2 g;

[0109] Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:10.

[0110] The preparation method of modified nano-silicon dioxide is:

[0111] Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%;

[0112] Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, cool to room temperature, and obtain modified nano-silica; the mass ratio of sodium dodecylbenzene sulfonate to vinyl triethoxysilane is 1:3-4; wherein the volume ratio of saturated ammonia water to sodium dodecylbenzene sulfonate solution is 1:1.

[0113] The centrifugal speed is 8000 r / min; the vacuum drying temperature is 60°C and the time is 10 hours.

[0114] Example 3

[0115] A novel liquid sanitary napkin, wherein the inner core of the novel liquid sanitary napkin contains a composite liquid material;

[0116] The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

[0117] The preparation method of the composite liquid material is as follows:

[0118] S1. The purified water and the modified nano-attapulgite were mixed uniformly in a mass ratio of 10:1.5, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion;

[0119] S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material;

[0120] The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100 mL: 42 g;

[0121] S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material; the low temperature drying temperature is 54°C.

[0122] The preparation method of modified nano-attapulgite is as follows:

[0123] First, lemon, purslane, and sophora flavescens are added to a blender in sequence, and then distilled water is added, and a mixed slurry is obtained after beating; the mixing ratio of lemon, purslane, sophora flavescens, and distilled water is 4.2 g: 1.3 g: 1.3 g: 300 mL;

[0124] Among them, the beating speed is 1200r / min;

[0125] The beating time is 20min;

[0126] Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was taken; the mass ratio of the mixed slurry to the anhydrous ethanol was 5:3;

[0127] The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion;

[0128] The pH of the dispersion is adjusted to 7.0 using a sodium hydroxide solution or a hydrochloric acid solution, and then the temperature is adjusted to 80° C., and the dispersion is stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite; wherein the concentration of the sodium hydroxide solution is 1 mol / L;

[0129] The concentration of the hydrochloric acid solution is 0.5 mol / L; the mixing ratio of nano-attapulgite and filtrate is 26 g:150 mL.

[0130] The preparation method of composite-based nano-molecular polymer is as follows:

[0131] First, acrylic acid and sodium hydroxide are added to deionized water in sequence, stirred and mixed for 15-20 minutes at room temperature, and then acrylamide is added and stirred for 40 minutes to obtain a first intermediate solution;

[0132] The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of nitrogen, a 5% ammonium persulfate solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules;

[0133] The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

[0134] The mixing ratio of acrylic acid, sodium hydroxide, and deionized water is 18mL:6g:60mL;

[0135] The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL;

[0136] The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180 mL: 1.6 g;

[0137] Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:10.

[0138] The preparation method of modified nano-silicon dioxide is:

[0139] Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%;

[0140] Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, cool to room temperature, and obtain modified nano-silica; the mass ratio of sodium dodecylbenzene sulfonate to vinyl triethoxysilane is 1:3.5; wherein, the volume ratio of saturated ammonia water to sodium dodecylbenzene sulfonate solution is 1:1.

[0141] The centrifugal speed is 8000 r / min; the vacuum drying temperature is 60°C and the time is 10 hours.

[0142] Example 4

[0143] A novel liquid sanitary napkin, wherein the inner core of the novel liquid sanitary napkin contains a composite liquid material;

[0144] The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

[0145] The preparation method of the composite liquid material is as follows:

[0146] S1. The purified water and the modified nano-attapulgite were mixed uniformly in a mass ratio of 10:1.8, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion;

[0147] S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material;

[0148] The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100 mL: 46 g;

[0149] S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material; the low temperature drying temperature is 54°C.

[0150] The preparation method of modified nano-attapulgite is as follows:

[0151] First, lemon, purslane, and sophora flavescens are added to a blender in sequence, and then distilled water is added, and a mixed slurry is obtained after beating; the mixing ratio of lemon, purslane, sophora flavescens, and distilled water is 4.5 g: 1.8 g: 1.8 g: 300 mL;

[0152] Among them, the beating speed is 1200r / min;

[0153] The beating time is 20min;

[0154] Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was taken; the mass ratio of the mixed slurry to the anhydrous ethanol was 5:3;

[0155] The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion;

[0156] The pH of the dispersion is adjusted to 7.0 using a sodium hydroxide solution or a hydrochloric acid solution, and then the temperature is adjusted to 80° C., and the dispersion is stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite; wherein the concentration of the sodium hydroxide solution is 1 mol / L;

[0157] The concentration of the hydrochloric acid solution is 0.5 mol / L; the mixing ratio of nano-attapulgite and filtrate is 28 g:150 mL.

[0158] The preparation method of composite-based nano-molecular polymer is as follows:

[0159] First, acrylic acid and sodium hydroxide were added to deionized water in sequence, stirred and mixed for 16 minutes at room temperature, and then acrylamide was added and stirred for 40 minutes to obtain a first intermediate solution;

[0160] The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of nitrogen, a 5% ammonium persulfate solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules;

[0161] The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

[0162] The mixing ratio of acrylic acid, sodium hydroxide, and deionized water is 18mL:6g:60mL;

[0163] The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL;

[0164] The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180 mL: 1.5 g;

[0165] Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:10.

[0166] The preparation method of modified nano-silicon dioxide is:

[0167] Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%;

[0168] Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, cool to room temperature, and obtain modified nano-silica; the mass ratio of sodium dodecylbenzene sulfonate to vinyl triethoxysilane is 1:3; wherein, the volume ratio of saturated ammonia water to sodium dodecylbenzene sulfonate solution is 1:1.

[0169] The centrifugal speed is 8000 r / min; the vacuum drying temperature is 60°C and the time is 10 hours.

[0170] Example 5

[0171] A novel liquid sanitary napkin, wherein the inner core of the novel liquid sanitary napkin contains a composite liquid material;

[0172] The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

[0173] The preparation method of the composite liquid material is as follows:

[0174] S1. The purified water and the modified nano-attapulgite were uniformly mixed in a mass ratio of 10:2, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion;

[0175] S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material;

[0176] The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100 mL: 50 g;

[0177] S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material; the low temperature drying temperature is 55°C.

[0178] The preparation method of modified nano-attapulgite is as follows:

[0179] First, lemon, purslane, and sophora flavescens are added to a blender in sequence, and then distilled water is added, and a mixed slurry is obtained after beating; the mixing ratio of lemon, purslane, sophora flavescens, and distilled water is 5g:2g:2g:300mL;

[0180] Among them, the beating speed is 1200r / min;

[0181] The beating time is 20min;

[0182] Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was taken; the mass ratio of the mixed slurry to the anhydrous ethanol was 5:3;

[0183] The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion;

[0184] The pH of the dispersion is adjusted to 7.0 using a sodium hydroxide solution or a hydrochloric acid solution, and then the temperature is adjusted to 80° C., and the dispersion is stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite; wherein the concentration of the sodium hydroxide solution is 1 mol / L;

[0185] The concentration of the hydrochloric acid solution is 0.5 mol / L; the mixing ratio of nano-attapulgite and filtrate is 30 g:150 mL.

[0186] The preparation method of composite-based nano-molecular polymer is as follows:

[0187] First, acrylic acid and sodium hydroxide are added to deionized water in sequence, stirred and mixed for 20 minutes at room temperature, and then acrylamide is added and stirred for 40 minutes to obtain a first intermediate solution;

[0188] The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of nitrogen, a 5% ammonium persulfate solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules;

[0189] The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

[0190] The mixing ratio of acrylic acid, sodium hydroxide, and deionized water is 18mL:6g:60mL;

[0191] The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL;

[0192] The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180 mL: 1.8 g;

[0193] Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:10.

[0194] The preparation method of modified nano-silicon dioxide is:

[0195] Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%;

[0196] Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, cool to room temperature, and obtain modified nano-silica; the mass ratio of sodium dodecylbenzene sulfonate to vinyl triethoxysilane is 1:4; wherein, the volume ratio of saturated ammonia water to sodium dodecylbenzene sulfonate solution is 1:1.

[0197] The centrifugal speed is 8000 r / min; the vacuum drying temperature is 60°C and the time is 10 hours.

[0198] Comparative Example 1:

[0199] Based on the technical solution of Example 1, modified nano-attapulgite is not added, and the rest of the technical solutions remain unchanged.

[0200] Comparative Example 2:

[0201] On the basis of the technical solution of Example 1, the modified nano-attapulgite is replaced by unmodified nano-attapulgite, and the rest of the technical solutions remain unchanged.

[0202] test:

[0203] To test the liquid absorption performance:

[0204] The samples of the embodiment and the comparative example were tested for liquid absorption rate and liquid absorption ratio;

[0205] The test method is based on GB / T22975-2008 for super absorbent resin for sanitary napkins:

[0206] Table 1

[0207] Liquid absorption rate Liquid absorption rate g / g Example 1 2.6 62.5 Example 2 2.3 64.2 Example 3 2.2 65.6 Example 4 2.5 63.7 Example 5 2.4 63.3 Comparative Example 1 3.6 53.5 Comparative Example 2 3.3 56.1

[0208] It can be seen from Table 1 that the new liquid sanitary napkin prepared by the present invention has a higher liquid absorption rate and liquid absorption ratio, and has a stronger water absorption performance.

[0209] Taking Example 1 as the basic sample, the effects of different mixing ratios of the first intermediate liquid and modified nano-silicon dioxide on the liquid absorption rate were compared;

[0210] Table 2

[0211] Mixing ratio Liquid absorption rate g / g 180mL: 0g 60.3 180mL: 0.5g 61.2 180mL: 1g 62.5 180mL: 1.5g 63.6 180mL: 2g 61.6 180mL: 2.5g 60.4

[0212] It can be seen from Table 2 that different mixing ratios of the first intermediate liquid and modified nano-silica have different effects on the liquid absorption rate. Excessive addition of modified nano-silica will slightly reduce the liquid absorption rate of the sample.

[0213] Backflow test:

[0214] 100g of physiological saline was poured into a culture dish, and 10g of the samples of the embodiment and the comparative example were used to absorb water until the dish was full.

[0215] Place 10 accurately weighed filter papers on the sample, and then press a 1000g weight on the sample. Count for 10 minutes, and then measure the weight gain of the filter paper, which is the back permeation amount of the sample:

[0216] Table 3

[0217]

[0218]

[0219] It can be seen from Table 3 that the sample prepared by the present invention has a lower back seepage amount and can effectively prevent the back seepage phenomenon of the sanitary napkin.

[0220] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification, should be within the protection scope of the present invention.

Claims

1. A new type of liquid sanitary napkin, characterized in that: The inner core of the novel liquid sanitary napkin contains a composite liquid material; The composite liquid material is formed by liquefying pure water, modified nano-attapulgite and composite-based nano-molecular-level polymer.

2. A novel liquid sanitary napkin according to claim 1, characterized in that: The modified nano-attapulgite preparation method is: First, lemon, purslane and sophora flavescens are added into a blender in sequence, and then distilled water is added, and blending is performed to obtain a mixed slurry; Among them, the beating speed is 1200r / min; The beating time is 20min; Anhydrous ethanol was added to the mixed slurry, stirred at 1200 r / min for 2 hours, then allowed to stand for 2 hours, centrifuged at 5000 r / min for 1 hour, allowed to stand for 2 hours, filtered, the residue was removed, and the filtrate was collected; The nano-attapulgite was added to the filtrate and dispersed by ultrasonic for 10 minutes to obtain a dispersion; The pH of the dispersion was adjusted to 7.0, and then the temperature was adjusted to 80° C., and the dispersion was stirred in a water bath for 4 hours, and then filtered and dried to obtain modified attapulgite.

3. A novel liquid sanitary napkin according to claim 2, characterized in that: The mixing ratio of the lemon, purslane, sophora flavescens and distilled water is 4-5g:1-2g:1-2g:300mL; The mass ratio of the mixed slurry to anhydrous ethanol is 5:3; The mixing ratio of the nano-attapulgite and the filtrate is 25-30 g:150 mL.

4. A novel liquid sanitary napkin according to claim 3, characterized in that: The pH is adjusted by using sodium hydroxide solution or hydrochloric acid solution; Wherein, the concentration of sodium hydroxide solution is 1 mol / L; The concentration of hydrochloric acid solution is 0.5 mol / L.

5. A new type of liquid sanitary napkin according to claim 4, characterized in that: The preparation method of the composite-based nano-molecular-level polymer is as follows: First, acrylic acid and sodium hydroxide are added to deionized water in sequence, stirred and mixed for 15-20 minutes at room temperature, and then acrylamide is added and stirred for 40 minutes to obtain a first intermediate solution; The first intermediate liquid and modified nano-silica are added to the reaction kettle, and under the protection of inert gas, the initiator solution is added dropwise, and then the reaction is carried out in a water bath for 24 hours, and the reaction material is discharged to obtain the reaction material, and the reaction material is washed to remove unreacted small molecules; The reaction material is vacuum dried and then crushed to obtain a nano-molecular polymer.

6. A new type of liquid sanitary napkin according to claim 5, characterized in that: The mixing ratio of acrylic acid, sodium hydroxide, and deionized water is 18mL:6g:60mL; The mixing ratio of acrylamide and acrylic acid is 0.6g:18mL; The mixing ratio of the first intermediate liquid and modified nano-silicon dioxide is 180mL: 1-1.8g; The initiator solution is an ammonium persulfate solution; The mass fraction of the ammonium persulfate solution is 5%; Among them, the mixing mass ratio of the initiator solution to the first intermediate solution is 1:

10.

7. A novel liquid sanitary napkin according to claim 2, characterized in that: The modified nano silicon dioxide preparation method is: Firstly, sodium dodecylbenzene sulfonate is added into deionized water, and stirred to mix evenly to obtain a sodium dodecylbenzene sulfonate solution with a mass fraction of 10%; Add vinyl triethoxysilane to the sodium dodecylbenzene sulfonate solution, stir and mix for 30 minutes, then add saturated ammonia water, adjust the temperature to 60°C, continue stirring for 2 hours, centrifuge for 30 minutes, filter, place at 80°C, dry for 2 hours, and cool to room temperature to obtain modified nano-silica; The mass ratio of sodium dodecylbenzenesulfonate to vinyltriethoxysilane is 1:3-4; Wherein, the volume ratio of saturated ammonia water and sodium dodecylbenzene sulfonate solution is 1:1; The centrifugal speed is 8000r / min.

8. A novel liquid sanitary napkin according to claim 1, characterized in that: The inert gas is nitrogen; The vacuum drying temperature was 60°C and the time was 10 hours.

9. A new type of liquid sanitary napkin according to claim 8, characterized in that: The preparation method of the composite liquid material is as follows: S1. The purified water and the modified nano-attapulgite were mixed uniformly in a mass ratio of 10:1-2, and then ultrasonically dispersed to obtain a modified nano-attapulgite dispersion; S2: adding a composite-based nano-molecular polymer to the modified nano-attapulgite dispersion, mixing and emulsifying, and then homogenizing at a speed of 8000 r / min for 2 minutes to obtain a composite liquid material; The mixing ratio of modified nano-attapulgite dispersion and composite-based nano-molecular polymer is 100mL: 40-50g; S2. Add the composite liquid material into the mold, dry and solidify it at low temperature for 2 hours, and then cut it to obtain the composite liquid material.

10. A novel liquid sanitary napkin according to claim 9, characterized in that: The low temperature drying temperature is 50-55°C.

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