CN113413269A - Bacteriostatic sanitary towel and preparation method thereof - Google Patents
Bacteriostatic sanitary towel and preparation method thereof Download PDFInfo
- Publication number
- CN113413269A CN113413269A CN202110684839.1A CN202110684839A CN113413269A CN 113413269 A CN113413269 A CN 113413269A CN 202110684839 A CN202110684839 A CN 202110684839A CN 113413269 A CN113413269 A CN 113413269A
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- CN
- China
- Prior art keywords
- absorption layer
- layer
- bacteriostatic
- breathable
- drying
- Prior art date
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- Granted
Links
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- 239000000843 powder Substances 0.000 claims abstract description 24
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Classifications
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Abstract
The invention discloses an antibacterial sanitary towel and a preparation method thereof. The bacteriostatic sanitary towel consists of a water absorption layer, a bacteriostatic health-care layer, a breathable high-absorption layer and a bottom layer. On one hand, the growth and the reproduction of microorganisms are inhibited, and peculiar smell is removed; on the other hand, the air permeability of the sanitary towel is improved, and the dryness of the female vulva is kept. According to the invention, tourmaline powder and super absorbent resin are added in the water absorption layer, so that the health care performance of far infrared and negative ion release of the antibacterial sanitary towel is given while the water absorption performance is further improved.
Description
Technical Field
The invention relates to the technical field of disposable sanitary products, in particular to an antibacterial sanitary towel and a preparation method thereof.
Background
Sanitary articles are commonly referred to as "disposable products". The sanitary article brings more convenience and comfort to the life of people, improves the life quality of people and is a necessary product for economic and social development. Sanitary napkins are one of the sanitary products. The sanitary towel is a high water absorption polymer, has the advantages of good absorbability, softness, comfort, sanitation, convenience and the like, and is widely applied to the menstrual period of women. With the improvement of health consciousness of female consumers, the requirements of the female consumers on the comfort, safety and the like of the sanitary towel are higher and higher.
Investigation shows that during menstruation, microorganisms are easy to breed and propagate in the sanitary towel, so that the resistance of reproductive organs is reduced, infection is easy to occur, and the health of women is affected. The breeding of bacteria causes foul smell and brings inconvenience to the life of women. Most of the sanitary napkins in the current market only pay attention to a certain single function of relieving dysmenorrheal, removing peculiar smell, resisting bacteria and the like.
Patent 201711032479.7 discloses a sanitary napkin with health-care function, which is prepared by permeating antibacterial health-care Chinese medicinal extract into the core layer of the sanitary napkin, so that the sanitary napkin has the characteristics of biological bacteriostasis, moisture absorption, odor removal and the like, but has poor water absorption and air permeability. Meanwhile, the health care function is poor without far infrared and anion effects.
Therefore, the invention discloses a bacteriostatic sanitary towel and a preparation method thereof.
Disclosure of Invention
In view of the above defects in the prior art, the invention provides an antibacterial sanitary napkin, wherein tourmaline powder and super absorbent resin are added in the water absorption layer, so that the water absorption performance is further improved, and the health care performance of far infrared and negative ion release is provided for the antibacterial sanitary napkin.
A bacteriostatic sanitary napkin comprises a water absorbing layer, a bacteriostatic health layer, a breathable high-absorption layer, and a bottom layer; the first layer is a water absorbing layer, the second layer is a bacteriostatic health-care layer, the third layer is a breathable high-absorption layer, and the fourth layer is a bottom layer.
Preferably, the preparation method of the water-absorbing layer comprises the following steps:
(1) according to the weight ratio of 1 g: (20-30) soaking the ES non-woven fabric in 40-45 wt% of hydrophilic finishing liquid for 30-60min by using mL, controlling the rolling retention rate to be 50-70%, and baking at the temperature of 150-180 ℃ for 20-30s to obtain the hydrophilic non-woven fabric; the hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent;
(2) and (2) uniformly mixing 85-95 parts by weight of super absorbent resin and 5-15 parts by weight of tourmaline powder, attaching the edges of the hydrophilic non-woven fabric in the step (1), and extruding the edges at high temperature to realize sealing, thus obtaining the water absorbing layer.
Preferably, the preparation method of the super absorbent resin comprises the following steps:
(1) weighing 2-4 g of bamboo powder, adding the bamboo powder into 80-120 mL of sodium citrate buffer solution with pH of 4.0-5.5, and uniformly stirring and mixing; adding 0.5-1 g of cellulase, and reacting in a constant-temperature water bath oscillator at 40-60 ℃ for 2-5 h; inactivating, centrifuging, collecting precipitate, and drying to obtain enzyme-treated bamboo pulp fiber;
(2) adding 2-4 g of bamboo pulp fiber after enzyme treatment into 80-120 mL of urea solution at-15-0 ℃, and stirring for reaction for 1-3 h; then regulating the pH value of the solution to 7 by using a sulfuric acid aqueous solution, centrifuging, taking the precipitate, and drying to obtain modified bamboo pulp fibers; the urea solution is prepared from sodium hydroxide, urea and water according to a mass ratio of 5-10: 10-15: 60-100 parts of a mixture is uniformly stirred;
(3) adding 3-8 g of modified bamboo pulp fiber into 80-120 mL of water, uniformly stirring, and introducing nitrogen to remove oxygen; adding 0.03-0.07 g of potassium persulfate under the conditions of 50-65 ℃ and nitrogen atmosphere at a speed of 100-500 r/min, stirring, condensing and refluxing for 5-20 min; then adding 30-50 g of acrylic acid solution with the neutralization degree of 50-80%, 0.02-0.03 g N, N-methylene bisacrylamide, and continuing to react for 4-8 hours after the system is gelled; and adding the mixed solution into 100mL of absolute ethyl alcohol, uniformly stirring, standing for 8-24 h, filtering, shearing a filter cake with scissors, drying in vacuum, and crushing to 325-800 meshes with a crusher to obtain the super absorbent resin.
Preferably, the preparation method of the bacteriostatic health-care layer comprises the following steps: (1) according to the weight ratio of 1 g: (20-30) putting the bamboo charcoal fiber into 10-20 wt% of sodium hydroxide aqueous solution, stirring at the temperature of 100-120 ℃ for 5-10min, washing and drying to obtain the pretreated bamboo charcoal fiber;
(2) soaking the pretreated bamboo charcoal fiber in an antibacterial finishing liquid at 45-50 ℃ for 40-60min, wherein the pretreated bamboo charcoal fiber and the antibacterial finishing liquid are mixed according to the mass ratio of 1 (8-12), and drying at 80-115 ℃ for 2-3h to obtain the antibacterial health-care layer;
the antibacterial finishing liquid is prepared by the following method: adding 1-5g of traditional Chinese medicine extract, 1-6g of 3- (methacryloyloxy) propyl trimethoxy silane, 0.5-2g of trisodium ethylenediamine disuccinate and 1-3g of glycerol into 80-100g of water, and mixing uniformly to obtain the antibacterial finishing liquid.
The preparation method of the traditional Chinese medicine extract comprises the following steps: drying the Chinese medicinal materials, and pulverizing to obtain Chinese medicinal powder; uniformly mixing the traditional Chinese medicine powder and water according to the mass ratio of 1 (5-25) and carrying out microwave treatment, wherein the microwave power is 800-1000W, and the microwave treatment time is 1-2 min; concentrating under reduced pressure until the relative density is 1-1.05g/mL to obtain Chinese medicinal extract.
The Chinese medicinal materials are one or more of Ganoderma, Curcuma rhizome, rhizoma Alpiniae Officinarum, herba Menthae, herba Moslae, flos Lonicerae, and herba Taraxaci.
Ganoderma (Ganoderma Lucidum Karst.) is derived from fresh fruiting body of Ganoderma Lucidum and Ganoderma sinense belonging to Polyporaceae, and has anticancer, immunity enhancing and antiinflammatory effects.
Curcuma longa L is derived from rhizome of Curcuma longa or Curcuma aromatica Salisb of Zingiberaceae, and has antitumor, antiinflammatory, and pathogenic microorganism resisting effects.
The rhizoma Alpiniae Officinarum is derived from rhizome of Alpinia officinarum Hance of Zingiberaceae, and has antibacterial and analgesic effects.
Herba Menthae (Mentha haplocalyx Briq.) is derived from whole leaf or stem and leaf of herba Menthae of Labiatae, and has analgesic, pathogenic bacteria resisting, and antiinflammatory effects.
Elsholtzia splendens (Elsholtzia ciliata (Thunb.) Hyland.) is derived from whole plant of Elsholtzia splendens of Labiatae, and has effects in enhancing immunity, clearing heat, relieving pain, and resisting pathogenic bacteria.
Flos Lonicerae (Lonicera Hypogluca) is derived from flower or dry flower bud of Caprifoliaceae plant, and has effects of resisting pathogenic microorganism, resisting inflammation, and enhancing function.
The herba Taraxaci (Taraxacum mongolicum hand. -Mazz.) is derived from whole herb with root of Compositae, and has good anti-infection and immunity enhancing effects.
On the basis, the bacterial cellulose, the acrylic acid and the ethylene propylene diene monomer are introduced to the grafted bamboo charcoal fiber and the chitin fiber material to prepare the breathable high-absorption layer, so that the breathability, the water absorption performance and the water retention performance of the bacteriostatic sanitary towel are improved. The possible reasons for this are: the bamboo charcoal fiber and the chitin fiber material are treated by combining an alkali washing mode and normal-pressure plasma jet treatment, so that the bamboo charcoal fiber and the chitin fiber material contain-OH and-COOH groups, and meanwhile, the bamboo charcoal fiber and the chitin fiber material interact with ceric ammonium nitrate, so that the AA-g-EPDM/bacterial cellulose is grafted with the bamboo charcoal fiber and the chitin fiber material, and the firmness of the AA-g-EPDM/bacterial cellulose in the bamboo charcoal fiber and the chitin fiber material is effectively improved; the bacterial cellulose has good air permeability and hydrophilicity, and the bacterial cellulose is introduced into acrylic acid, ethylene propylene diene monomer, pentaerythritol trienyl ether and allyl sucrose for reaction crosslinking and grafting, so that the water absorption of the air-permeable high-absorption layer is further improved.
Preferably, the preparation method of the breathable high-absorption layer comprises the following steps:
(1) according to the weight ratio of 1 g: (20-30) mL, placing the air-permeable high-absorption layer material in 10-20 wt% of sodium hydroxide aqueous solution, stirring at 100-120 ℃ for 5-10min, washing, and drying to obtain an alkaline air-permeable high-absorption layer; treating the alkaline breathable high-absorption layer for 80-120s by adopting normal-pressure plasma jet to obtain a pretreated breathable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen (97-99): (1-3) mixing;
(2) according to the weight ratio of 1 g: (20-30) mL, adding the pretreated breathable high-absorption layer material into a 2-5 wt% ammonium ceric nitrate aqueous solution, soaking for 1-2h, controlling the rolling residual rate to be 60-100%, and drying to obtain a modified breathable high-absorption layer material; according to the weight ratio of 1 g: (20-30) mL, adding the modified breathable high-absorption layer material into 3-7 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution, soaking for 1-2h, controlling the rolling residual rate to be 60-100%, and drying at 80-100 ℃ for 30-60min to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of (60-90): (5-20) the mixture is obtained by pressing through a spunlace non-woven fabric production process.
The preparation method of the AA-g-EPDM/bacterial cellulose compound comprises the following steps:
(1) adding 0.5-2g of bacterial cellulose and 4-8g of coupling agent into 100-200mL of acetone for ultrasonic treatment for 5-10min, wherein the ultrasonic power is 800-1000W and the ultrasonic frequency is 20-40kHz, heating to 80-100 ℃ for reaction for 1-2h, centrifuging and drying to obtain modified bacterial cellulose;
the coupling agent is vinyl tri (b-methoxyethoxy) silane;
(2) adding 2-5g of acrylic acid, 5-10g of ethylene propylene diene monomer, 1-6g of modified bacterial cellulose, 0.1-0.3mL of tetramethylethylenediamine, 0.4-0.9mL of azobisisobutyronitrile and 0.4-0.9g of cross-linking agent into 100-100 mL of ethyl acetate, heating to 80-100 ℃, reacting for 1-2h, centrifuging and drying to obtain AA-g-EPDM/bacterial cellulose.
The cross-linking agent is pentaerythritol triallyl ether and/or allyl sucrose.
Preferably, the cross-linking agent is formed by mixing pentaerythritol trienyl ether and allyl sucrose according to a mass ratio of (1-3) to (1-3).
Preferably, the bottom layer is an anti-leakage breathable bottom film.
The invention also discloses a preparation method of the bacteriostatic sanitary towel, which comprises the following steps: and sequentially stacking the water absorbing layer, the bacteriostatic health-care layer, the breathable high-absorption layer and the bottom layer according to the sequence, and extruding the edges at high temperature after the edges are attached to realize sealing, thus obtaining the bacteriostatic sanitary towel.
The invention has the beneficial effects that:
according to the invention, tourmaline powder and super absorbent resin are added in the water absorption layer, so that the health care performance of far infrared and negative ion release of the antibacterial sanitary towel is given while the water absorption performance is further improved.
According to the invention, bacterial cellulose, acrylic acid and ethylene propylene diene monomer are introduced into the grafting core layer and the breathable high-absorption layer is prepared, so that the breathability, water absorption and water retention of the bacteriostatic sanitary towel are improved. The possible reasons for this are: the modal fiber and the chitin fiber material are treated by combining an alkali washing mode and normal-pressure plasma jet treatment, so that the modal fiber and the chitin fiber material contain-OH and-COOH groups, and meanwhile, the modal fiber and the chitin fiber material interact with ceric ammonium nitrate, so that AA-g-EPDM/bacterial cellulose is grafted with the modal fiber and the chitin fiber material, and the firmness of AA-g-EPDM/bacterial cellulose in the modal fiber and the chitin fiber material is effectively improved; the bacterial cellulose has good air permeability and hydrophilicity, and the bacterial cellulose is introduced into acrylic acid, ethylene propylene diene monomer, pentaerythritol trienyl ether and allyl sucrose for reaction crosslinking and grafting, so that the water absorption of the air-permeable high-absorption layer is further improved.
According to the invention, acrylic acid is a high-water-absorption substance, and can react and crosslink with bacterial cellulose, a coupling agent, acrylic acid, ethylene propylene diene monomer, pentaerythritol trienyl ether and allyl sucrose to prepare AA-g-EPDM/bacterial cellulose, so that a reticular structure is formed, meanwhile, the bacterial cellulose is firmly locked in an AA-g-EPDM compound, the water absorption and water retention of a breathable high-absorption layer of the composite are improved, and the breathability of the bacteriostatic sanitary towel is improved.
Detailed Description
The above summary of the present invention is described in further detail below with reference to specific embodiments, but it should not be understood that the scope of the above subject matter of the present invention is limited to the following examples.
The anti-leakage air-permeable basement membrane is a PE (polyethylene) membrane with the density of 50g/m produced by Nantong Haiki Wei building materials Co2。
Bacterial Cellulose (BC), food grade, molecular weight 5.18X 103Purchased from Hainan foods GmbH.
Modal fiber, 1.0D, was purchased from shaoxing danau textile limited.
Chitin fiber, linear density: 1.0dtex, purchased from Zibo blue nanomaterial Co., Ltd.
Ganoderma lucidum, Curcuma longa, Alpinia officinarum, mint, herba Moslae, flos Lonicerae and herba Taraxaci are all commercially available.
Acrylic acid, CAS No.: 79-10-7, acrylic acid content: 99.5% from Shanghaining silver Business development, Inc.
3- (methacryloyloxy) propyltrimethoxysilane, CAS No.: 2530-85-0, purity: 99% of the total amount of the feed is purchased from Wuhan Haoring Biotechnology limited.
Trisodium ethylenediamine disuccinate, CAS No.: 20846-91-7, purity: 99% of the total amount of the total amounts of all the total amounts of all the total.
Vinyltris (b-methoxyethoxy) silane, CAS No.: 1067-53-4, purity: 99% from ferry chemical company, Hubei.
Ethylene propylene diene monomer, CAS No.: 23627-24-9, purity: 99% from Nanjing Ponno Biotech, Inc.
Tetramethylethylenediamine, CAS No.: 110-18-9, purity: 99% from Shanghai Michelin Biotechnology, Inc.
Azobisisobutyronitrile, CAS number: 78-67-1, purity: 98% of the total weight of the composition, purchased from Shanghai Michelin Biotechnology, Inc.
Pentaerythritol triallyl ether, CAS number: 1471-17-6, purity: 99% from Hubei Nonakojic technologies, Inc.
Allyl sucrose, CAS number: 68784-14-5, purity: 99% from Hubei Nonakojic technologies, Inc.
Cerium ammonium nitrate, CAS No.: 16774-21-3, purity: 99% from Shanghai Michelin Biotechnology, Inc.
The ES non-woven fabric is prepared from two raw materials, namely polypropylene (PP) and Polyethylene (PE), by a composite spinning method; the ES nonwoven fabric is made of ES fibers by a hot air method and purchased from Changxing Hengyue nonwoven fabric Co.
DP-1001 hydrophilic finish, purchased from Debao chemical Co., Zhang hong Kong.
Bamboo charcoal fiber, 1.5D, purchased from Taicangfang Ke textile Co.
Tourmaline powder, 400 mesh, China Union mineral processing factory in Lingshou county.
Bamboo powder, 80 mesh, Longxian county Longtan Zhen Boli bamboo and wood products factory.
The cellulase added in this example was a cellulase enzyme mixture enzyme, CAS No.: 9012-54-8, enzyme activity 1000U/g, Shanghai Aladdin Biotechnology GmbH.
Acrylic acid, CAS No.: 105-11-3, Shandongxin Asian chemical technology Co., Ltd.
N, N' -methylenebisacrylamide, CAS No.: 110-26-9, Shenzhenzekiake Biotech, Inc.
Example 1
A bacteriostatic sanitary napkin is prepared from water-absorbing layer, core layer, and bottom layer by conventional processing.
Example 2
A bacteriostatic sanitary napkin is prepared by sequentially stacking water absorbing layer, bacteriostatic health layer and bottom layer, attaching edges, and extruding at high temperature to seal.
The bottom layer is an anti-leakage breathable basement membrane.
The preparation method of the water absorption layer comprises the following steps: according to the weight ratio of 1 g: and (3) soaking the ES non-woven fabric in 45 wt% of hydrophilic finishing liquid for 30min by 30mL, controlling the rolling residue rate to be 65%, and baking at 180 ℃ for 30s to obtain the water absorbing layer.
The hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent.
The preparation method of the bacteriostatic health-care layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of bamboo charcoal fiber is placed in 20 wt% of sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and the bamboo charcoal fiber is washed and dried to obtain pretreated bamboo charcoal fiber;
(2) dipping the pretreated bamboo charcoal fiber in an antibacterial finishing liquid at 45 ℃ for 60min, wherein the mass ratio of the pretreated bamboo charcoal fiber to the antibacterial finishing liquid is 1: drying at 8,100 deg.C for 2h to obtain the antibacterial health layer;
the antibacterial finishing liquid is prepared by the following method: adding 5g of the Chinese medicinal extract, 6g of 3- (methacryloyloxy) propyl trimethoxy silane, 0.5g of trisodium ethylenediamine disuccinate and 3g of glycerol into 100g of water, and mixing uniformly to obtain the antibacterial finishing liquid.
The preparation method of the traditional Chinese medicine extract comprises the following steps: drying the Chinese medicinal materials, and pulverizing to obtain Chinese medicinal powder; mixing the traditional Chinese medicine powder and water according to a mass ratio of 1: 25 mixing uniformly, performing microwave treatment for 2min at a microwave power of 800W, concentrating under reduced pressure until the relative density is 1.05g/mL to obtain traditional Chinese medicine extract;
the traditional Chinese medicines are prepared by mixing lucid ganoderma, turmeric, galangal, mint, elsholtzia, lonicera confusa and dandelion according to a mass ratio of 1:1:1:1:1: 1.
Example 3
A bacteriostatic sanitary napkin is prepared by sequentially stacking water absorbing layer, bacteriostatic health layer, air permeable high absorption layer and bottom layer, attaching edges, extruding the edges at high temperature, and sealing.
The bottom layer is an anti-leakage breathable basement membrane.
The preparation method of the water absorption layer comprises the following steps: according to the weight ratio of 1 g: and (3) soaking the ES non-woven fabric in 45 wt% of hydrophilic finishing liquid for 30min by 30mL, controlling the rolling residue rate to be 65%, and baking at 180 ℃ for 30s to obtain the water absorbing layer.
The hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent.
The preparation method of the bacteriostatic health-care layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of bamboo charcoal fiber is placed in 20 wt% of sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and the bamboo charcoal fiber is washed and dried to obtain pretreated bamboo charcoal fiber;
(2) dipping the pretreated bamboo charcoal fiber in an antibacterial finishing liquid at 45 ℃ for 60min, wherein the mass ratio of the pretreated bamboo charcoal fiber to the antibacterial finishing liquid is 1: drying at 8,100 deg.C for 2h to obtain the antibacterial health layer;
the antibacterial finishing liquid is prepared by the following method: adding 5g of the Chinese medicinal extract, 6g of 3- (methacryloyloxy) propyl trimethoxy silane, 0.5g of trisodium ethylenediamine disuccinate and 3g of glycerol into 100g of water, and mixing uniformly to obtain the antibacterial finishing liquid.
The preparation method of the traditional Chinese medicine extract comprises the following steps: drying the Chinese medicinal materials, and pulverizing to obtain Chinese medicinal powder; mixing the traditional Chinese medicine powder and water according to a mass ratio of 1: 25 mixing uniformly, performing microwave treatment for 2min at a microwave power of 800W, concentrating under reduced pressure until the relative density is 1.05g/mL to obtain traditional Chinese medicine extract;
the traditional Chinese medicines comprise lucid ganoderma, turmeric, galangal, mint, elsholtzia, lonicera confusa and dandelion according to a mass ratio of 1:1:1:1:1:1:1 and mixing.
The preparation method of the breathable high-absorption layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of the material of the air-permeable high absorption layer is placed in a 20 wt% sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and then washed and dried to obtain the material of the alkaline air-permeable high absorption layer; treating the alkaline air-permeable high-absorption layer material for 100s by adopting normal-pressure plasma jet to obtain a pretreated air-permeable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen is 98: 2, mixing;
(2) according to the weight ratio of 1 g: 30mL of the pretreated breathable high-absorption layer material is added into a 3 wt% ammonium ceric nitrate aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is obtained after drying; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM/bacterial cellulose compound comprises the following steps:
(1) adding 2g of bacterial cellulose and 6g of coupling agent into 120mL of acetone for ultrasonic treatment for 10min, wherein the ultrasonic power is 800W and the ultrasonic frequency is 40kHz, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain modified bacterial cellulose;
the coupling agent is vinyl tri (b-methoxyethoxy) silane;
(2) adding 4g of acrylic acid, 8g of ethylene propylene diene monomer, 3g of modified bacterial cellulose, 0.2mL of tetramethylethylenediamine, 0.5mL of azobisisobutyronitrile and 0.5g of cross-linking agent into 150mL of ethyl acetate, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain AA-g-EPDM/bacterial cellulose.
The cross-linking agent is formed by mixing pentaerythritol triallyl ether and allyl sucrose according to the mass ratio of 2: 1.
Example 4
A bacteriostatic sanitary napkin is prepared by sequentially stacking water absorbing layer, bacteriostatic health layer, air permeable high absorption layer and bottom layer, attaching edges, extruding the edges at high temperature, and sealing.
The bottom layer is an anti-leakage breathable basement membrane.
The preparation method of the water absorption layer comprises the following steps: according to the weight ratio of 1 g: and (3) soaking the ES non-woven fabric in 45 wt% of hydrophilic finishing liquid for 30min by 30mL, controlling the rolling residue rate to be 65%, and baking at 180 ℃ for 30s to obtain the water absorbing layer.
The hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent.
The preparation method of the bacteriostatic health-care layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of bamboo charcoal fiber is placed in 20 wt% of sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and the bamboo charcoal fiber is washed and dried to obtain pretreated bamboo charcoal fiber;
(2) placing the pretreated bamboo charcoal fiber in an antibacterial finishing liquid at 45 ℃ for soaking for 60min, wherein the mass ratio of the pretreated bamboo charcoal fiber to the antibacterial finishing liquid is 1: drying at 8,100 deg.C for 2h to obtain the antibacterial health layer;
the antibacterial finishing liquid is prepared by the following method: adding 5g of the Chinese medicinal extract, 6g of 3- (methacryloyloxy) propyl trimethoxy silane, 0.5g of trisodium ethylenediamine disuccinate and 3g of glycerol into 100g of water, and mixing uniformly to obtain the antibacterial finishing liquid.
The preparation method of the traditional Chinese medicine extract comprises the following steps: drying the Chinese medicinal materials, and pulverizing to obtain Chinese medicinal powder; mixing the traditional Chinese medicine powder and water according to a mass ratio of 1: 25 mixing uniformly, performing microwave treatment for 2min at a microwave power of 800W, concentrating under reduced pressure until the relative density is 1.05g/mL to obtain traditional Chinese medicine extract;
the traditional Chinese medicines comprise lucid ganoderma, turmeric, galangal, mint, elsholtzia, lonicera confusa and dandelion according to a mass ratio of 1:1:1:1:1:1:1 and mixing.
The preparation method of the breathable high-absorption layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of the material of the air-permeable high absorption layer is placed in a 20 wt% sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and then washed and dried to obtain the material of the alkaline air-permeable high absorption layer; treating the alkaline air-permeable high-absorption layer material for 100s by adopting normal-pressure plasma jet to obtain a pretreated air-permeable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen is 98: 2, mixing;
(2) according to the weight ratio of 1 g: 30mL of the pretreated breathable high-absorption layer material is added into a 3 wt% ceric ammonium nitrate aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified core layer material is obtained after drying; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM/bacterial cellulose compound comprises the following steps:
(1) adding 2g of bacterial cellulose and 6g of coupling agent into 120mL of acetone for ultrasonic treatment for 10min, wherein the ultrasonic power is 800W and the ultrasonic frequency is 40kHz, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain modified bacterial cellulose;
the coupling agent is vinyl tri (b-methoxyethoxy) silane;
(2) adding 4g of acrylic acid, 8g of ethylene propylene diene monomer, 3g of modified bacterial cellulose, 0.2mL of tetramethylethylenediamine, 0.5mL of azobisisobutyronitrile and 0.5g of cross-linking agent into 150mL of ethyl acetate, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain AA-g-EPDM/bacterial cellulose.
The cross-linking agent is pentaerythritol triallyl ether.
Example 5
A bacteriostatic sanitary napkin is prepared by sequentially stacking water absorbing layer, bacteriostatic health layer, air permeable high absorption layer and bottom layer, attaching edges, extruding the edges at high temperature, and sealing.
The bottom layer is an anti-leakage breathable basement membrane.
The preparation method of the water absorption layer comprises the following steps: according to the weight ratio of 1 g: and (3) soaking the ES non-woven fabric in 45 wt% of hydrophilic finishing liquid for 30min by 30mL, controlling the rolling residue rate to be 65%, and baking at 180 ℃ for 30s to obtain the water absorbing layer.
The hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent.
The preparation method of the bacteriostatic health-care layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of bamboo charcoal fiber is placed in 20 wt% of sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and the bamboo charcoal fiber is washed and dried to obtain pretreated bamboo charcoal fiber;
(2) placing the pretreated bamboo charcoal fiber in an antibacterial finishing liquid at 45 ℃ for soaking for 60min, wherein the mass ratio of the pretreated bamboo charcoal fiber to the antibacterial finishing liquid is 1: drying at 8,100 deg.C for 2h to obtain the antibacterial health layer;
the antibacterial finishing liquid is prepared by the following method: adding 5g of the Chinese medicinal extract, 6g of 3- (methacryloyloxy) propyl trimethoxy silane, 0.5g of trisodium ethylenediamine disuccinate and 3g of glycerol into 100g of water, and mixing uniformly to obtain the antibacterial finishing liquid.
The preparation method of the traditional Chinese medicine extract comprises the following steps: drying the Chinese medicinal materials, and pulverizing to obtain Chinese medicinal powder; mixing the traditional Chinese medicine powder and water according to a mass ratio of 1: 25 mixing uniformly, performing microwave treatment for 2min at a microwave power of 800W, concentrating under reduced pressure until the relative density is 1.05g/mL to obtain traditional Chinese medicine extract;
the traditional Chinese medicines comprise lucid ganoderma, turmeric, galangal, mint, elsholtzia, lonicera confusa and dandelion according to a mass ratio of 1:1:1:1:1:1:1 and mixing.
The preparation method of the breathable high-absorption layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of the material of the air-permeable high absorption layer is placed in a 20 wt% sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and then washed and dried to obtain the material of the alkaline air-permeable high absorption layer; treating the alkaline air-permeable high-absorption layer material for 100s by adopting normal-pressure plasma jet to obtain a pretreated air-permeable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen is 98: 2, mixing;
(2) according to the weight ratio of 1 g: 30mL of the pretreated breathable high-absorption layer material is added into a 3 wt% ammonium ceric nitrate aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is obtained after drying; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM/bacterial cellulose compound comprises the following steps:
(1) adding 2g of bacterial cellulose and 6g of coupling agent into 120mL of acetone for ultrasonic treatment for 10min, wherein the ultrasonic power is 800W and the ultrasonic frequency is 40kHz, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain modified bacterial cellulose;
the coupling agent is vinyl tri (b-methoxyethoxy) silane;
(2) adding 4g of acrylic acid, 15g of ethylene propylene diene monomer, 3g of modified bacterial cellulose, 0.2mL of tetramethylethylenediamine, 0.5mL of azobisisobutyronitrile and 0.5g of cross-linking agent into 150mL of ethyl acetate, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain AA-g-EPDM/bacterial cellulose.
The cross-linking agent is allyl sucrose.
Comparative example 1
Essentially the same as example 3, except that: the preparation method of the breathable high-absorption layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of the material of the air-permeable high absorption layer is placed in a 20 wt% sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and then washed and dried to obtain the material of the alkaline air-permeable high absorption layer; treating the alkaline air-permeable high-absorption layer material for 100s by adopting normal-pressure plasma jet to obtain a pretreated air-permeable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen is 98: 2, mixing;
(2) according to the weight ratio of 1 g: 30mL of the pretreated breathable high-absorption layer material is added into a 3 wt% ammonium ceric nitrate aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is obtained after drying; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM compound comprises the following steps: adding 4g of acrylic acid, 15g of ethylene propylene diene monomer, 0.2mL of tetramethylethylenediamine, 0.5mL of azobisisobutyronitrile and 0.5g of crosslinking agent into 150mL of ethyl acetate, heating to 100 ℃ for reaction for 2h, centrifuging and drying to obtain the AA-g-EPDM compound.
The cross-linking agent is formed by mixing pentaerythritol triallyl ether and allyl sucrose according to the mass ratio of 2: 1.
Comparative example 2
Essentially the same as example 3, except that: the preparation method of the breathable high-absorption layer comprises the following steps: according to the weight ratio of 1 g: 30mL of the material of the breathable high absorption layer is added into a 3 wt% ammonium ceric nitrate aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the material is dried to obtain the material of the modified breathable high absorption layer; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM/bacterial cellulose composite is the same as that of example 3.
Comparative example 3
Essentially the same as example 3, except that: the preparation method of the breathable high-absorption layer comprises the following steps: (1) according to the weight ratio of 1 g: 30mL of the material of the air-permeable high absorption layer is placed in a 20 wt% sodium hydroxide aqueous solution and stirred for 5min at 100 ℃, and then washed and dried to obtain the material of the alkaline air-permeable high absorption layer;
(2) according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is obtained by adding the alkaline breathable high-absorption layer material into a 3 wt% ammonium ceric nitrate aqueous solution, soaking for 1h, controlling the rolling residual rate to be 90%, and drying; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM/bacterial cellulose composite is the same as that of example 3.
Comparative example 4
Essentially the same as example 3, except that: the preparation method of the breathable high-absorption layer comprises the following steps: (1) treating the air-permeable high-absorption layer material for 80-120s by adopting normal-pressure plasma jet to obtain a pretreated air-permeable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen is 98: 2, mixing;
(2) according to the weight ratio of 1 g: 30mL of the pretreated breathable high-absorption layer material is added into a 3 wt% ammonium ceric nitrate aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is obtained after drying; according to the weight ratio of 1 g: 30mL of the modified breathable high-absorption layer material is added into 5 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution to be soaked for 1h, the rolling residual rate is controlled to be 90%, and the modified breathable high-absorption layer material is dried for 60min at 100 ℃ to obtain the breathable high-absorption layer.
The breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of 85: 15 the mixture is obtained by pressing through a spunlace nonwoven process.
The preparation method of the AA-g-EPDM/bacterial cellulose composite is the same as that of example 3.
Test example 1
Water absorption performance:
the non-water-absorption parts of the side edges of the bacteriostatic sanitary towels prepared in the examples 2-5 and the comparative examples 1-4 are cut off, the bacteriostatic sanitary towels are placed in distilled water with the depth of 10cm and the temperature of 23 ℃, the use surface is upward, the sanitary towels are lightly pressed to be completely immersed, the sanitary towels are lifted up after 60s to ensure that the samples are completely separated from the water surface, the samples are vertically hung for 90s, then weighing is carried out, the water absorption multiplying power is calculated, three groups of parallel tests are respectively carried out, and the average value is calculated.
K＝(n-m)/m×100％
In the formula: k is the water absorption rate;
n is the mass after absorption (g);
and m is the mass (g) before absorption.
TABLE 1 test results of water absorption performance of bacteriostatic sanitary napkins
Note: the water absorption capacity is an average value in the table.
As is clear from Table 1, the water absorption capacity of examples 3 to 5 is high, and among them, the water absorption capacity of example 3 is the highest and can reach 52.34%, that is, the water absorption is the strongest. The water absorption rate of the bacteriostatic sanitary napkins of the example 2 and the bacteriostatic sanitary napkins of the comparative examples 1-4 is lower than that of the bacteriostatic sanitary napkins of the examples 3-5, and the results show that the prepared bacteriostatic sanitary napkins have excellent water absorption performance.
Test example 2
The rewet property:
the bacteriostatic sanitary napkins prepared in examples 2-5 and comparative examples 1-4 were subjected to a rewet test.
Dyeing distilled water with blue dye, respectively transferring 5mL of the distilled water to the center of the surface of the bacteriostatic sanitary towel prepared in examples 1-5 and comparative examples 1-4, placing water-absorbing facial tissue on the surface of the bacteriostatic sanitary towel, placing a 200g weight on the surface of the water-absorbing facial tissue for 10s, lifting, observing the wet area of the water-absorbing facial tissue, and testing results are shown in table 2:
TABLE 2 Return permeability test results of bacteriostatic sanitary napkins
| Return permeability (cm)2) | |
| Example 2 | 3.1 |
| Example 3 | 1.2 |
| Example 4 | 1.6 |
| Example 5 | 1.5 |
| Comparative example 1 | 1.8 |
| Comparative example 2 | 2.4 |
| Comparative example 3 | 2.1 |
| Comparative example 4 | 2.2 |
As can be seen from Table 2, example 3The rewet areas of-5 and comparative example 1 were 1-2cm2Wherein the rewet area of example 3 is 1.2cm2Therefore, has good back-osmosis performance. The rewet area of examples 2 and comparative examples 2-4 is significantly greater than that of examples 3-5 and comparative example 1, at 2-3.1cm2In the meantime. The composition and type of the material in the breathable superabsorbent core layer has a significant effect on rewet.
Test example 3
Bactericidal and antibacterial properties:
the antibacterial sanitary napkins prepared in the examples 1-5 and the comparative examples 1-4 are subjected to sterilization and antibacterial performance tests according to the test method of sterilization performance and antibacterial performance of the product in appendix 4 of GB/T15979-2002 hygienic Standard for Disposable sanitary articles.
The test microorganism is: escherichia coli ATCC 25922; staphylococcus aureus ATCC 6538; candida albicans ATCC 10231.
After the bacteriostatic sanitary napkins prepared in examples 1-5 and comparative examples 1-4 were sterilized by ultraviolet irradiation for 1.5min, Escherichia coli 1.0X 10 was uniformly coated on the surface of the sanitary napkins5CFU/tablet, Staphylococcus aureus 1.0X 105CFU/tablet, Candida albicans 1.0 × 105CFU/tablet, tested after 30 minutes of action.
And (3) testing results: the Escherichia coli in the bacteriostatic sanitary napkins prepared in examples 2-5 and comparative examples 1-4 is 0-5X 103CFU/tablet, Staphylococcus aureus 0-5.0 × 103CFU/tablet, Candida albicans 1.0 × 103-5.0×103CFU/sheet; the bacteriostatic sanitary napkin prepared in example 1 has Escherichia coli content of 1.0 × 105CFU/tablet, Staphylococcus aureus 1.0X 105CFU/tablet, Candida albicans 1.0 × 105CFU/sheet.
According to the invention, the traditional Chinese medicine extract is grafted on bamboo charcoal fiber to prepare bacteriostatic health-care cotton bamboo charcoal fiber, a breathable high-absorption core layer and a leakage-proof bottom layer, so that on one hand, the growth and the reproduction of microorganisms are inhibited, and peculiar smell is removed; on the other hand, the air permeability of the sanitary towel is improved, and the dryness of the female vulva is kept. According to the antibacterial health-care cotton bamboo charcoal fiber, the traditional Chinese medicine extract is grafted on the cotton bamboo charcoal fiber to prepare the antibacterial health-care cotton bamboo charcoal fiber, and the traditional Chinese medicine substances have synergistic effect, so that the breeding and propagation of microorganisms are effectively inhibited, meanwhile, the antibacterial health-care cotton bamboo charcoal fiber has a protective effect on skin mucosa, the stimulation is reduced, and the skin itch is avoided.
Test example 4
Air permeability:
the bacteriostatic sanitary napkins prepared in examples 2-5 and comparative examples 1-4 were subjected to air permeability test with reference to GB/T5453-1997 determination of textile fabric air permeability.
TABLE 3 test results of air permeability of bacteriostatic sanitary napkins
| Air permeability (mm/s) | |
| Example 2 | 4543 |
| Example 3 | 5347 |
| Example 4 | 5301 |
| Example 5 | 5320 |
| Comparative example 1 | 5190 |
| Comparative example 2 | 4863 |
| Comparative example 3 | 4932 |
| Comparative example 4 | 4915 |
Compared with the comparative example 1, the bacteria cellulose, the acrylic acid and the ethylene propylene diene monomer rubber are introduced into the grafted modal fiber and the chitin fiber material to prepare the breathable high-absorption layer, so that the breathability, the water absorption performance and the water retention performance of the bacteriostatic sanitary towel are improved. The possible reasons for this are: the modal fiber and the chitin fiber material are treated by combining an alkali washing mode and normal-pressure plasma jet treatment, so that the modal fiber and the chitin fiber material contain-OH and-COOH groups, and meanwhile, the modal fiber and the chitin fiber material interact with ceric ammonium nitrate, so that AA-g-EPDM/bacterial cellulose is grafted with the modal fiber and the chitin fiber material, and the firmness of AA-g-EPDM/bacterial cellulose in the modal fiber and the chitin fiber material is effectively improved; the bacterial cellulose has good air permeability and hydrophilicity, and the bacterial cellulose is introduced into acrylic acid, ethylene propylene diene monomer, pentaerythritol trienyl ether and allyl sucrose for reaction crosslinking and grafting, so that the water absorption of the air permeable absorption layer is further improved.
As can be seen from Table 3, the air permeability of the bacteriostatic sanitary napkins in the examples 3-5 and the comparative example 1 is more than 5000mm/s, wherein the air permeability of the bacteriostatic sanitary napkin in the example 3 is the best. The air permeability of the bacteriostatic sanitary napkins in the example 2 and the comparative examples 2-4 is lower than 5000mm/s, which shows that the bacteriostatic sanitary napkins prepared by the invention have high air permeability, and the water absorption layer, the bacteriostatic health-care layer, the breathable high-absorption layer and the leakage-proof bottom layer can influence the air permeability of the sanitary napkins.
Example 6
Essentially the same as example 3, except that: the preparation method of the water absorbing layer is different.
The preparation method of the water-absorbing layer of example 6 includes the following steps:
(1) according to the weight ratio of 1 g: 30mL of the ES non-woven fabric is placed in 45 wt% of hydrophilic finishing liquid to be soaked for 30min, the rolling residual rate is controlled to be 65%, and the ES non-woven fabric is baked for 30s at 180 ℃ to obtain hydrophilic non-woven fabric;
the hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent;
(2) and (2) uniformly mixing 90 parts by weight of super absorbent resin and 10 parts by weight of tourmaline powder, attaching the edges of the hydrophilic non-woven fabric obtained in the step (1), and then extruding the edges at high temperature to realize sealing, thus obtaining the water absorbing layer.
The preparation method of the super absorbent resin comprises the following steps:
(1) weighing 3g of bamboo powder, adding into 100mL of sodium citrate buffer solution with pH of 4.8 and concentration of 0.1mol/L, and stirring and mixing uniformly; adding 1g of cellulase, and reacting in a constant-temperature water bath oscillator at 50 ℃ for 3 h; then inactivating in a water bath at 100 ℃ for 10 min; centrifuging at 25 deg.C at 2500r/min for 15min, collecting precipitate, and air drying at 50 deg.C for 12 hr to obtain bamboo pulp fiber after enzyme treatment;
(2) adding 3g of bamboo pulp fiber after enzyme treatment into 100mL-10 ℃ urea solution, and stirring for 2h at room temperature and 100 rpm; then regulating the pH value of the solution to 7 by using a 5 wt% sulfuric acid aqueous solution, centrifuging for 15min at the room temperature at the rotating speed of 2500r/min, taking the precipitate, and carrying out forced air drying for 12h at the temperature of 50 ℃ to obtain modified bamboo pulp fibers; the urea solution is prepared from sodium hydroxide, urea and water according to a mass ratio of 8: 12: 80 mixing and stirring uniformly;
(3) adding 5g of modified bamboo pulp fiber into 100mL of water, stirring uniformly, introducing nitrogen to remove oxygen; adding 0.05g of potassium persulfate at 60 ℃ in a nitrogen atmosphere at 100r/min, stirring, condensing and refluxing for 15 min; then 40g of acrylic acid solution with the neutralization degree of 70 percent and 0.024g N, N' -methylene bisacrylamide are added, and the reaction is continued for 6 hours after the system has gel; adding the mixed solution into 100mL of absolute ethyl alcohol, uniformly stirring, standing for 12h, filtering, shearing a filter cake by using scissors, drying for 24h at 50 ℃ in vacuum, and crushing to 400 meshes by using a crusher to obtain the super absorbent resin.
The weight of each piece of the antibacterial sanitary napkin prepared in the embodiment 6 is only 0.3g higher than that of the antibacterial sanitary napkin prepared in the embodiment 3, namely the total weight of the super absorbent resin and the tourmaline powder added in the water absorption layer of the embodiment is 0.3 g.
The antibacterial sanitary napkin prepared in example 6 was tested for water absorption properties by referring to the method disclosed in test example 1, and the test results were: the water absorption capacity was 59.62%.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. A bacteriostatic sanitary napkin comprises a water absorbing layer, a bacteriostatic health layer, a breathable high-absorption layer, and a bottom layer; the first layer is a water absorption layer, the second layer is a bacteriostatic health-care layer, the third layer is a breathable high absorption layer, and the fourth layer is a bottom layer; the preparation method of the water absorbing layer is characterized by comprising the following steps:
(1) according to the weight ratio of 1 g: (20-30) soaking the ES non-woven fabric in 40-45 wt% of hydrophilic finishing liquid for 30-60min by using mL, controlling the rolling retention rate to be 50-70%, and baking at the temperature of 150-180 ℃ for 20-30s to obtain the hydrophilic non-woven fabric; the hydrophilic finishing liquid is DP-1001 hydrophilic finishing agent;
(2) and (2) uniformly mixing 85-95 parts by weight of super absorbent resin and 5-15 parts by weight of tourmaline powder, attaching the edges of the hydrophilic non-woven fabric in the step (1), and extruding the edges at high temperature to realize sealing, thus obtaining the water absorbing layer.
2. The bacteriostatic sanitary towel according to claim 1, wherein the preparation method of the super absorbent resin comprises the following steps:
(1) weighing 2-4 g of bamboo powder, adding the bamboo powder into 80-120 mL of sodium citrate buffer solution with pH of 4.0-5.5, and uniformly stirring and mixing; adding 0.5-1 g of cellulase, and reacting in a constant-temperature water bath oscillator at 40-60 ℃ for 2-5 h; inactivating, centrifuging, collecting precipitate, and drying to obtain enzyme-treated bamboo pulp fiber;
(2) adding 2-4 g of bamboo pulp fiber after enzyme treatment into 80-120 mL of urea solution at-15-0 ℃, and stirring for reaction for 1-3 h; then regulating the pH value of the solution to 7 by using a sulfuric acid aqueous solution, centrifuging, taking the precipitate, and drying to obtain modified bamboo pulp fibers; the urea solution is prepared from sodium hydroxide, urea and water according to a mass ratio of 5-10: 10-15: 60-100 parts of a mixture is uniformly stirred;
(3) adding 3-8 g of modified bamboo pulp fiber into 80-120 mL of water, uniformly stirring, and introducing nitrogen to remove oxygen; adding 0.03-0.07 g of potassium persulfate under the conditions of 50-65 ℃ and nitrogen atmosphere at a speed of 100-500 r/min, stirring, condensing and refluxing for 5-20 min; then adding 30-50 g of acrylic acid solution with the neutralization degree of 50-80%, 0.02-0.03 g N, N-methylene bisacrylamide, and continuing to react for 4-8 hours after the system is gelled; and adding the mixed solution into 100mL of absolute ethyl alcohol, uniformly stirring, standing for 8-24 h, filtering, shearing a filter cake with scissors, drying in vacuum, and crushing to 325-800 meshes with a crusher to obtain the super absorbent resin.
3. The bacteriostatic sanitary towel according to claim 1, wherein the preparation method of the bacteriostatic health-care layer comprises the following steps:
(1) according to the weight ratio of 1 g: (20-30) putting the bamboo charcoal fiber into 10-20 wt% of sodium hydroxide aqueous solution, stirring at the temperature of 100-120 ℃ for 5-10min, washing and drying to obtain the pretreated bamboo charcoal fiber;
(2) soaking the pretreated bamboo charcoal fiber in an antibacterial finishing liquid at 45-50 ℃ for 40-60min, wherein the mass ratio of the pretreated bamboo charcoal fiber to the antibacterial finishing liquid is 1 (8-12), and drying at 80-115 ℃ for 2-3h to obtain the antibacterial health-care layer; the antibacterial finishing liquid is prepared by the following method: adding 1-5g of traditional Chinese medicine extract, 1-6g of 3- (methacryloyloxy) propyl trimethoxy silane, 0.5-2g of trisodium ethylenediamine disuccinate and 1-3g of glycerol into 80-100g of water, and mixing uniformly to obtain the antibacterial finishing liquid.
4. The bacteriostatic sanitary napkin according to claim 1, wherein the preparation method of the air-permeable high absorption layer comprises the following steps:
(1) according to the weight ratio of 1 g: (20-30) mL, placing the air-permeable high-absorption layer material in 10-20 wt% of sodium hydroxide aqueous solution, stirring at 100-120 ℃ for 5-10min, washing, and drying to obtain an alkaline air-permeable high-absorption layer; treating the alkaline breathable high-absorption layer for 80-120s by adopting normal-pressure plasma jet to obtain a pretreated breathable high-absorption layer material; wherein, helium is taken as a carrier, and oxygen is taken as a reaction gas; and the volume ratio of helium to oxygen (97-99): (1-3) mixing;
(2) according to the weight ratio of 1 g: (20-30) mL, adding the pretreated breathable high-absorption layer material into a 2-5 wt% ammonium ceric nitrate aqueous solution, soaking for 1-2h, controlling the rolling residual rate to be 60-100%, and drying to obtain a modified breathable high-absorption layer material; according to the weight ratio of 1 g: (20-30) mL, adding the modified breathable high-absorption layer material into 3-7 wt% of AA-g-EPDM/bacterial cellulose compound aqueous solution, soaking for 1-2h, controlling the rolling residual rate to be 60-100%, and drying at 80-100 ℃ for 30-60min to obtain the breathable high-absorption layer.
5. Bacteriostatic sanitary napkin according to claim 4, wherein the breathable high-absorption layer material is prepared from modal fibers and chitin fibers in a mass ratio of (60-90): (5-20) mixing, and pressing by a spunlace non-woven fabric production process.
6. The method for preparing a bacteriostatic sanitary towel as claimed in claim 1, which is characterized in that: the bottom layer is an anti-leakage breathable basement membrane.
7. The method for preparing a bacteriostatic sanitary towel according to any one of claims 1-6, characterized in that: and sequentially stacking the water absorbing layer, the bacteriostatic health-care layer, the breathable high-absorption layer and the bottom layer according to the sequence, and extruding the edges at high temperature after the edges are attached to realize sealing, thus obtaining the bacteriostatic sanitary towel.
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