CN114469530A - Nano silver antibacterial sanitary towel - Google Patents
Nano silver antibacterial sanitary towel Download PDFInfo
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- CN114469530A CN114469530A CN202210238576.6A CN202210238576A CN114469530A CN 114469530 A CN114469530 A CN 114469530A CN 202210238576 A CN202210238576 A CN 202210238576A CN 114469530 A CN114469530 A CN 114469530A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/47—Sanitary towels, incontinence pads or napkins
- A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/84—Accessories, not otherwise provided for, for absorbent pads
- A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/40—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing ingredients of undetermined constitution or reaction products thereof, e.g. plant or animal extracts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F2013/16—Sanitary towels; Means for supporting or fastening them
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/84—Accessories, not otherwise provided for, for absorbent pads
- A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
- A61F2013/8408—Additives, e.g. for odour, disinfectant or pH control with odour control
- A61F2013/8414—Additives, e.g. for odour, disinfectant or pH control with odour control with anti-microbic
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials
- A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
- A61L2300/104—Silver, e.g. silver sulfadiazine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
- A61L2300/30—Compounds of undetermined constitution extracted from natural sources, e.g. Aloe Vera
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/404—Biocides, antimicrobial agents, antiseptic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/12—Nanosized materials, e.g. nanofibres, nanoparticles, nanowires, nanotubes; Nanostructured surfaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention discloses a nano-silver antibacterial sanitary towel. The nano-silver antibacterial sanitary towel consists of a surface layer, a nano-silver chip, an absorption layer, a bottom film, a release paper layer, a coating film and quick and easy sticking which are sequentially overlapped from top to bottom. The nano silver chip is obtained by respectively carrying out antibacterial finishing and hydrophilic finishing on non-woven fabrics after non-treatment. Compared with the prior art, the invention uses the by-product cocoa bean husk discarded in the cocoa powder processing as the raw material, reduces the waste and expands the application field of the cocoa bean husk; the cocoa bean hull extract has good antibacterial and antioxidant effects, and can reduce silver ions into nano silver particles which have excellent antibacterial performance together with the nano silver particles in the sanitary towel; moreover, the nano-silver sanitary towel also has good permeability.
Description
Technical Field
The invention relates to the technical field of absorption pads, in particular to a nano-silver antibacterial sanitary towel.
Background
A sanitary towel is a female sanitary article and mainly comprises cotton, non-woven fabric, paper pulp or other composite materials. The sanitary napkin is a substance having an absorption function and can absorb menstrual blood and the like during the menstrual period of a female. During menstruation, the women have lowered systemic immunity due to the reduced excitability of cerebral cortex, are easy to receive various bacterial infections, and the genital organs are more easily infected with inflammation than usual. During menstruation, the endometrium is stripped to form a plurality of scars, which creates a favorable environment for the propagation of bacteria and further initiates a series of gynecological inflammations. Therefore, the development of sanitary napkins with bacteriostatic function is important.
As a substance with bacteriostatic function, the nano silver particles can strongly attract sulfydryl on protease in a bacterial body and rapidly combine with the sulfydryl, so that the protease of the bacterial body loses activity, and the bacteria die. The nano silver has active property and is harmless to human bodies, and the nano silver is introduced into the production and the manufacture of the sanitary towel, so that the dispersibility of the nano silver on the surface of the sanitary towel is improved, the use efficiency of nano silver particles can be improved, the production cost is reduced, and the sterilization effect can be improved.
Cocoa beans are seeds of the cacao tree (the academic name Theobroma cacao L). Theobroma cacao is originally produced in the tropical rainforest in America, is one of representative economic species in equatorial regions, is mainly distributed near the equator, has unique flavor and taste, medicinal function and health-care food effect, is very popular with people, and has wide development and application prospects. The cocoa beans contain polyphenol compounds, volatile oil, vegetable protein, alkaloid, dietary fiber and other components. Wherein the polyphenol exhibits excellent antioxidant activity and can react with free radicals in living organisms, and the product is phenolic oxygen free radical. It can reduce or even avoid the damage of organism by free radical. The polyphenol can specifically coagulate bacterial protein, destroy cell membrane mechanism, combine with bacterial genetic material, change its physiology, and inhibit bacterial growth.
The patent CN 102600021B discloses a nano-silver far infrared anion magnetotherapy sanitary towel, which is obtained by soaking a sanitary towel chip in a nano-silver antibacterial solution at the temperature of 80-95 ℃ for 24-48 hours, then soaking the sanitary towel chip in infrared anion, and finally taking out and spraying magnetic powder; patent 200820044745.8 discloses a nanometer silver ion sanitary towel, through arranging nanometer silver ion chip layer in the centre of nanometer silver sanitary towel to be equipped with the guiding gutter on the sanitary towel top layer, add polymer water absorbent resin and cover natural plant extraction essence on the surface, promoted the absorption function of sanitary towel, and restrain breeding of bacterium. In the schemes reported in the patents, the sanitary towel is soaked in the nano-silver antibacterial solution for a long time, the requirement on the soaking temperature is high, the production cycle in actual production is long, the productivity cannot be greatly improved, and meanwhile, the energy consumption of production is increased and the production cost is increased.
Disclosure of Invention
In view of the above defects in the prior art, the present invention provides a nano-silver antibacterial sanitary napkin, which has good antibacterial effect and good permeability.
The traditional silver-containing antibacterial finishing liquid generally adopts complex silver as an antibacterial component, the complex silver, namely silver ions, needs to reach a certain concentration to exert the antibacterial effect, and meanwhile, the antibacterial time is short, and the effect is easy to lose; the silver ion has the biggest characteristic that the silver ion has strong binding force with chlorine element of human body fluid and is easy to become silver chloride which is insoluble precipitate, so that the silver loses the antibacterial effect. In practical use, the release of silver ions is uncontrollable, and the silver ions lose one or more electrons and have strong oxidizability, namely traditional cytotoxicity; silver ions can generate osmotic pressure difference in water, so that nerves are stimulated to generate pain. Compared with silver ions, the nano silver particles are colloidal nano particle silver simple substance, the problem cannot be caused when the nano silver particles are used as bacteriostatic components, and the preparation of the nano silver has higher requirements on the process compared with the silver ions.
A significant amount of cocoa shell by-products, such as cocoa shell, remain during processing of cocoa beans. The inventor finds that the cocoa bean shells contain a plurality of active ingredients with good bacteriostatic effects; the cocoa bean hull extract has reducibility, can reduce silver ions into nano silver particles, the nano silver particles are efficient and safe antibacterial components, and can play a good antibacterial effect together with the cocoa bean hull extract in a sanitary towel, and the polyphenol component contained in the cocoa bean hull extract can introduce hydrophilic hydroxyl groups on the surfaces of the nano silver particles so as to improve the dispersibility of the nano silver particles in the antibacterial finishing liquid.
A nanometer silver antibacterial sanitary towel comprises a surface layer, a nanometer silver chip, an absorption layer, a bottom membrane, a release paper layer, a coating film and a quick and easy paste which are sequentially stacked from top to bottom.
The production method of the nano silver chip comprises the following steps:
(1) soaking 100-300 parts by weight of non-woven fabric in 40-50 ℃ cellulase water solution for 20-50 min, and washing the non-woven fabric with water, wherein the weight of the non-woven fabric is 3-5 wt% of the cellulase water solution for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 15-30 ℃ for 60-150 min, wherein the weight of the dipped non-woven fabric is 18-27 wt% of the bacteriostatic finishing liquid;
(3) irradiating the non-woven fabric impregnated with the antibacterial finishing liquid for 40-50 min under ultraviolet rays;
(4) steaming the non-woven fabric subjected to ultraviolet irradiation for 35-40 min under the conditions that the temperature is 110-120 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 1-3 times;
(6) and drying the washed non-woven fabric at 60-80 ℃, rolling into a proper thickness, and cutting into proper widths to obtain the nano-silver chip.
Preferably, the concentration of the cellulase aqueous solution is 1.2-2.4 g/L.
The preparation method of the antibacterial finishing liquid comprises the following steps:
(a) drying cocoa bean shells at 40-50 ℃, crushing and grinding the dried cocoa bean shells into powder, wherein the particle size of the ground particles is 60-80 meshes, so as to obtain cocoa bean shell powder for later use;
(b) mixing cocoa shell powder with 65-80 wt% of ethanol water solution according to a weight ratio of 1: (45-60), heating by microwave for 5-8 min, filtering the extracting solution by filter paper, centrifuging the filtrate by a centrifugal machine, and obtaining supernatant which is the cocoa bean hull extract;
(c) taking 10-30 parts of silver nitrate, 120-180 parts of cocoa shell extract, 60-90 parts of water-soluble sophora alopecuroide powder and 1000-2000 parts of water by weight for later use;
(d) adding the cocoa bean hull extract into water, controlling the stirring speed to be 90-120 r/min, and stirring for 10-15 min; then adding silver nitrate, controlling the stirring speed to be 45-60 r/min, and stirring for 30-60 min; and finally, adding water-soluble sophora alopecuroide powder with the particle size of 80-100 meshes, controlling the stirring speed to be 60-90 r/min, stirring for 10-15 min, and filtering to obtain the antibacterial finishing liquid.
Preferably, the step (6) may further include: drying the washed non-woven fabric at 60-80 ℃; soaking the fabric in a hydrophilic finishing liquid for 10-30 min according to a bath ratio of 1 (10-20) g/mL, and controlling the rolling residual rate to be 70-90%; drying at 60-80 ℃ for 1-5 min, and then drying at 110-120 ℃ for 3-10 min; and rolling the dried non-woven fabric into a proper thickness, and cutting into proper widths to obtain the nano-silver chip.
Preferably, the preparation method of the hydrophilic finishing liquid comprises the following steps: dissolving 5-10 g of trehalose and 15-25 g of raffinose in 300-1000 mL of water, and adding 40-60 g of sodium periodate twice under the stirring condition; and then reacting for 4-10 hours at room temperature in a dark condition, adding 25-40 g of barium chloride, stirring for 4-10 hours at 5-10 ℃, and filtering to obtain filtrate, namely the hydrophilic finishing liquid.
In the invention:
cocoa bean hulls: the hard shell of cocoa beans, which is rich in natural antibacterial substances such as polyphenols, is usually discarded as a by-product in the production of cocoa powder; in the invention, the cocoa bean hull extract can be used as a natural antibacterial component and can also be used as a reducing agent to reduce silver ions into nano silver particles.
Silver nitrate: the crystal is colorless transparent orthorhombic flaky crystal, is easily soluble in water, is soluble in ether and glycerin, is slightly soluble in absolute ethyl alcohol, and is almost insoluble in concentrated nitric acid. The aqueous solution is weakly acidic. The silver nitrate solution has strong oxidizability and certain corrosiveness because of containing a large amount of silver ions, is used for corroding hyperplastic granulation tissues medically, and the dilute solution is used as a bactericide for eye infection. The liquid was a pale yellow liquid after melting and was still white after solidification. The invention is used as the raw material for preparing the nano silver particles.
Water-soluble sophora alopecuroide powder: sophora alopecuroides L has the efficacies of clearing heat and drying dampness, relieving pain and killing insects; sophora alopecuroide is used for clearing heat and drying dampness to stop leukorrhagia, and can be indicated for leukorrhagia. The water-soluble sophora alopecuroide powder is prepared by processing sophora alopecuroide seeds by adopting a spray drying technology, and is used as a raw material for preparing the antibacterial finishing liquid.
Raffinose is prepared from galactose, fructose and glucose.
Trehalose, a non-reducing disaccharide consisting of two glucose molecules.
According to the invention, trehalose and raffinose are prepared under the action of sodium periodate to obtain hydrophilic finishing; the hydrophilic performance of the non-woven fabric after antibacterial finishing can be effectively improved, so that the finally prepared nano-silver antibacterial sanitary towel has remarkable water absorption performance while the antibacterial performance is ensured.
The invention has the beneficial effects that:
(1) compared with the prior art, the non-woven fabric used in the invention has lower impregnation time and impregnation temperature, the production period and energy consumption are shortened, the surface of the non-woven fabric is treated by cellulase, the fiber surface area of the non-woven fabric is increased, effective bacteriostatic components are easier to adsorb and retain, the bacteriostatic ability is improved, and the service life is prolonged; the cocoa bean husk which is discarded as the cocoa bean processing by-product under the common condition is recycled, the waste is reduced, and the application field of the cocoa bean husk is developed.
(2) Compared with the prior art, the antibacterial finishing liquid bag is prepared by a solution method, silver nitrate is used as a silver ion source, silver ions are reduced into nano silver particles by the cocoa bean hull extract, the loss caused by silver oxidation in the processing process is reduced, the dispersibility of the nano silver particles in a solution system is better, and the antibacterial effect is greatly improved.
(3) Compared with the prior art, the antibacterial finishing liquid disclosed by the invention contains polyphenol, and has the effects of resisting oxidation and protecting color of nano silver particles.
(4) Compared with the prior art, the non-woven fabric impregnated with the antibacterial finishing liquid is irradiated under ultraviolet rays, and is chemically reduced through the ultraviolet rays, so that silver nitrate remaining on the surface of the non-woven fabric can be further uniformly generated into silver nanoparticles without agglomeration, and the antibacterial effect of a nano silver chip is improved; the uv irradiation itself also further inhibits the presence of bacteria during the production process.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Introduction of raw materials in the examples:
cellulase, enzyme activity 1.1 ten thousand U/g, Ningxia Shensheng industry group Co., Ltd, CAS number: 9012-54-8;
cocoa bean husk, Hainan Xinke tropical crop engineering technologies, Inc.;
water-soluble sophora alopecuroide powder, hibiscus-sonte biotechnology ltd;
the modal fiber is produced by Aodilandin company, and the product specification is as follows: 1.3Dtex X38 mm.
The cotton fiber is fine cotton, and the specification is as follows: 1.8Dtex X30 mm.
Non-woven fabric, ingredient ES fiber, gram weight 25g/m2Model number ESHA-202, Minn Hai Kangli sanitary materials, Foshan.
In the examples, a commercially available ultraviolet sterilizer was used for the ultraviolet irradiation.
Example 1
The nano silver chip is prepared by the following method:
(1) soaking 150 parts by weight of non-woven fabric in 45 ℃ cellulase aqueous solution for 40min, and washing the non-woven fabric with water, wherein the weight of the non-woven fabric is 3.5 wt% of the cellulase aqueous solution for later use;
(2) soaking the soaked non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the weight of the non-woven fabric is 21 wt% of the cellulase aqueous solution;
(3) irradiating the non-woven fabric impregnated with the antibacterial finishing liquid for 45min under ultraviolet rays;
(4) steaming the non-woven fabric irradiated by the ultraviolet rays for 40min under the conditions that the temperature is 110 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 3 times;
(6) and drying the washed non-woven fabric at 75 ℃, rolling the non-woven fabric into a thickness of 0.5cm, and cutting the non-woven fabric into a length of 15cm and a width of 5cm to obtain the nano-silver chip.
The concentration of the cellulase aqueous solution is 1.2 g/L.
The preparation method of the antibacterial finishing liquid comprises the following steps: (a) drying cocoa bean shells at 40 ℃, crushing and grinding the dried cocoa bean shells into powder, wherein the particle size of the ground particles is 80 meshes to obtain cocoa bean shell powder for later use; (b) mixing cocoa shell powder with 70 wt% ethanol water solution according to the weight ratio of 1: mixing at a ratio of 50, microwave heating for 6min, filtering the extractive solution with filter paper, centrifuging the filtrate in a centrifuge, and collecting supernatant to obtain cocoa shell extract; (c) taking 135 parts of cocoa bean hull extract, 60 parts of water-soluble sophora alopecuroide powder and 1200 parts of water by weight for later use; (d) adding cacao bean husk extract into water, controlling stirring speed at 120r/min, and stirring for 15 min; and then adding water-soluble sophora alopecuroide powder with the particle size of 100 meshes, controlling the stirring speed to be 60r/min, stirring for 15min, and filtering to obtain the antibacterial finishing liquid.
The nano silver antibacterial sanitary towel has a structure of a surface layer, is made of pure cotton spunlaced cloth and has the gram weight of 100g/m2And the nano-silver chip of example 1 disposed under the top layer, and the absorbent layer disposed under the nano-silver chip, the absorbent layer comprising an absorbent 1 (a bamboo fiber gauze of the product number C40 x 40 x 88 x 64 x 56, supplied by terra cotton textile limited) and an absorbent 2 (a water-absorbent resin for sanitary napkins of the NR-VS-01 type, produced by shandong norkel biotechnology limited) disposed under the absorbent 1, and a base film (a PE film, produced by shenzhen kuanlong packaging material limited, having a grammage of 50g/m, disposed under the absorbent layer2) And release paper (white glassine release paper produced by Shanghai Rusin industries, Ltd., gram weight 80 g/m)2) And a coating film (with a thickness of 0.025mm and produced by Ethyl company and MODEL MODEL XP 39385) arranged below the release paper and a quick-release patch (provided by Jinbaoli sanitary products, Inc. of Quanzhou city)Quick and easy to stick). The surface layer, the nano-silver chip, the absorption layer, the bottom film, the release paper, the coating film and the quick and easy sticker of the embodiment 1 are prepared into the sanitary towel with the antibacterial function according to the conventional process of the sanitary towel.
Example 2
The nano silver chip is prepared by the following method:
(1) soaking 150 parts by weight of non-woven fabric in 45 ℃ cellulase aqueous solution for 40min, and washing the non-woven fabric with water, wherein the weight of the non-woven fabric is 3.5 wt% of the cellulase aqueous solution for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the weight of the non-woven fabric is 21 wt% of the bacteriostatic finishing liquid;
(3) irradiating the non-woven fabric impregnated with the antibacterial finishing liquid for 45min under ultraviolet rays;
(4) steaming the non-woven fabric irradiated by the ultraviolet rays for 40min under the conditions that the temperature is 110 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 3 times;
(6) and drying the washed non-woven fabric at 75 ℃, rolling the non-woven fabric into a thickness of 0.5cm, and cutting the non-woven fabric into a length of 15cm and a width of 5cm to obtain the nano-silver chip.
The concentration of the cellulase aqueous solution is 1.2 g/L.
The preparation method of the antibacterial finishing liquid comprises the following steps: (a) taking 135 parts of silver nitrate, 60 parts of water-soluble sophora alopecuroide powder and 1200 parts of water by weight for later use; (b) adding silver nitrate into water, controlling the stirring speed at 60r/min, and stirring for 30 min; adding water-soluble sophora alopecuroide powder with the particle size of 100 meshes, controlling the stirring speed to be 90r/min, stirring for 15min, and filtering to obtain the antibacterial finishing liquid.
The nano silver antibacterial sanitary towel has a structure of a surface layer, is made of pure cotton spunlaced cloth and has the gram weight of 100g/m2And the nano-silver chip of example 2 disposed under the top layer, and the absorbent layer disposed under the nano-silver chip, the absorbent layer including an absorbent 1 (a bamboo fiber gauze having a product number of C40 x 40 x 88 x 64 x 56, available from lothan textile limited, taian) and an absorbent 2 disposed under the absorbent 1 (a bamboo fiber gauze having a product number of C40 x 40 x 64 x 56, available from shandong norl bioscience limited, co.)NR-VS-01 type water-absorbent resin for sanitary napkins produced by department of Japan) and a base film (PE film produced by Shenzhen Fuchang packaging materials Co., Ltd., grammage of 50 g/m)2) And release paper (white glassine release paper produced by Shanghai Rusin industries, Ltd., gram weight 80 g/m)2) The release paper comprises release paper, a coating (a low-density polyethylene coating of MODEL MODEL XP 39385 produced by Ethyl company with the thickness of 0.025mm) arranged below the release paper and a quick-release sticker (a quick-release sticker provided by Jinbaoli sanitary products, Inc. of Quanzhou). And preparing the surface layer, the nano-silver chip, the absorption layer, the bottom film, the release paper, the coating film and the quick and easy sticker of the embodiment 2 according to a conventional process of the sanitary towel to obtain the nano-silver sanitary towel.
Example 3
The nano silver chip is prepared by the following method:
(1) soaking 150 parts by weight of non-woven fabric in 45 ℃ cellulase aqueous solution for 40min, and washing the non-woven fabric with water, wherein the weight of the non-woven fabric is 3.5 wt% of the cellulase aqueous solution for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the weight of the non-woven fabric is 21 wt% of the bacteriostatic finishing liquid;
(3) irradiating the non-woven fabric impregnated with the antibacterial finishing liquid for 45min under ultraviolet rays;
(4) steaming the non-woven fabric irradiated by the ultraviolet rays for 40min under the conditions that the temperature is 110 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 3 times;
(6) and drying the washed non-woven fabric at 75 ℃, rolling the non-woven fabric into a thickness of 0.5cm, and cutting the non-woven fabric into a length of 15cm and a width of 5cm to obtain the nano-silver chip.
The concentration of the cellulase aqueous solution is 1.2 g/L.
The preparation method of the antibacterial finishing liquid comprises the following steps: (a) drying cocoa bean shells at 40 ℃, crushing and grinding the dried cocoa bean shells into powder, wherein the particle size of the ground particles is 80 meshes to obtain cocoa bean shell powder for later use; (b) mixing cocoa shell powder with 70 wt% ethanol water solution according to the weight ratio of 1: mixing at a ratio of 50, microwave heating for 6min, filtering the extractive solution with filter paper, centrifuging the filtrate in a centrifuge, and collecting supernatant to obtain cocoa shell extract; (c) taking 15 parts of silver nitrate, 120 parts of cocoa shell extract, 60 parts of water-soluble sophora alopecuroide powder and 1200 parts of water for later use; (d) adding cacao bean husk extract into water, controlling stirring speed at 120r/min, and stirring for 15 min; then adding silver nitrate, controlling the stirring speed to be 60r/min, and stirring for 30 min; and finally, adding water-soluble sophora alopecuroide powder with the particle size of 100 meshes, controlling the stirring speed to be 90r/min, stirring for 15min, and filtering to obtain the antibacterial finishing liquid.
The nano silver antibacterial sanitary towel has a structure of a surface layer, is made of pure cotton spunlaced cloth and has the gram weight of 100g/m2And the nano-silver chip of example 3 disposed under the top layer, and the absorbent layer disposed under the nano-silver chip, the absorbent layer comprising an absorbent 1 (a bamboo fiber gauze of the product number C40 x 40 x 88 x 64 x 56, supplied by terra cotton textile limited) and an absorbent 2 (a water-absorbent resin for sanitary napkins of the model NR-VS-01, produced by shandong noral biotechnology limited) disposed under the absorbent 1, and a base film (a PE film, produced by shenzhen kunlong packaging material limited, having a grammage of 50g/m, disposed under the absorbent layer2) And release paper (white glassine release paper produced by Shanghai Rusin industry Co., Ltd., gram weight 80 g/m)2) And a coating film (a low-density polyethylene coating film of MODEL MODEL XP 39385 produced by Ethyl company and with the thickness of 0.025mm) arranged below the release paper and a quick-release sticker (provided by Jinbaoli sanitary products, Inc. of Quanzhou city) arranged below the coating film. And (3) preparing the surface layer, the nano-silver chip, the absorption layer, the bottom film, the release paper, the coating film and the quick and easy sticker of the embodiment 3 according to a conventional process of the sanitary towel to obtain the nano-silver sanitary towel.
Example 4
The nano silver chip is prepared by the following method:
(1) soaking 150 parts by weight of non-woven fabric in water at 45 ℃ for 40min, wherein the weight of the non-woven fabric is 3.5 wt% of the water, and washing with water for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the weight of the non-woven fabric is 21 wt% of the bacteriostatic finishing liquid;
(3) irradiating the non-woven fabric impregnated with the antibacterial finishing liquid for 45min under ultraviolet rays;
(4) steaming the non-woven fabric irradiated by the ultraviolet rays for 40min under the conditions that the temperature is 110 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 3 times;
(6) and drying the washed non-woven fabric at 75 ℃, rolling the non-woven fabric into a thickness of 0.5cm, and cutting the non-woven fabric into a length of 15cm and a width of 5cm to obtain the nano-silver chip.
The preparation method of the antibacterial finishing liquid comprises the following steps: (a) drying cocoa bean shells at 40 ℃, crushing and grinding the dried cocoa bean shells into powder, wherein the particle size of the ground particles is 80 meshes to obtain cocoa bean shell powder for later use; (b) mixing cocoa shell powder with 70 wt% ethanol water solution according to the weight ratio of 1: mixing at a ratio of 50, microwave heating for 6min, filtering the extractive solution with filter paper, centrifuging the filtrate in a centrifuge, and collecting supernatant to obtain cocoa shell extract; (c) taking 15 parts of silver nitrate, 120 parts of cocoa shell extract, 60 parts of water-soluble sophora alopecuroide powder and 1200 parts of water for later use; (d) adding cacao bean husk extract into water, controlling stirring speed at 120r/min, and stirring for 15 min; then adding silver nitrate, controlling the stirring speed to be 60r/min, and stirring for 30 min; and finally, adding water-soluble sophora alopecuroide powder with the particle size of 100 meshes, controlling the stirring speed to be 90r/min, stirring for 15min, and filtering to obtain the antibacterial finishing liquid.
Adding cacao bean husk extract into water, controlling stirring speed at 120r/min, and stirring for 15 min; and then adding water-soluble sophora alopecuroide powder with the particle size of 100 meshes, controlling the stirring speed to be 60r/min, stirring for 15min, and filtering to obtain the antibacterial finishing liquid.
The nano silver antibacterial sanitary towel has a structure of a surface layer, is made of pure cotton spunlaced cloth and has the gram weight of 100g/m2And the nano-silver chip of example 4 disposed under the top layer, and the absorbent layer disposed under the nano-silver chip, the absorbent layer including an absorbent 1 (made of bamboo fiber supplied by wet textile limited of takan, under the trade designation C40 x 40 x 88 x 64 x 56)Weiyu gauze), an absorber 2 (made of water-absorbent resin for sanitary napkin of NR-VS-01 type produced by Shandong Noel Biotech Co., Ltd.) disposed below the absorber 1, and a base film (made of PE film produced by Shenzhen Fuklong packaging Material Co., Ltd., grammage of 50 g/m) disposed below the absorbing layer2) And release paper (white glassine release paper produced by Shanghai Rusin industries, Ltd., gram weight 80 g/m)2) And a coating film (a low-density polyethylene coating film of MODEL MODEL XP 39385 produced by Ethyl company and with the thickness of 0.025mm) arranged below the release paper and a quick-release sticker (provided by Jinbaoli sanitary products, Inc. of Quanzhou city) arranged below the coating film. And preparing the surface layer, the nano-silver chip, the absorption layer, the bottom film, the release paper, the coating film and the quick and easy sticker of the embodiment 4 according to a conventional process of the sanitary towel to obtain the nano-silver sanitary towel.
Comparative example 1
The sanitary towel core is prepared by adopting the following method:
(1) soaking 150 parts by weight of non-woven fabric in water at 45 ℃ for 40min, wherein the weight of the non-woven fabric is 3.5 wt% of the water, and washing with water for later use;
(2) irradiating the non-woven fabric with ultraviolet rays for 45 min;
(3) steaming the non-woven fabric irradiated by the ultraviolet rays for 40min under the conditions that the temperature is 110 ℃ and the relative humidity is 100%;
(4) washing the non-woven fabric irradiated by the ultraviolet rays with water for 3 times;
(5) drying the washed non-woven fabric at 75 ℃, rolling the non-woven fabric into a thickness of 0.5cm, and cutting the non-woven fabric into a length of 15cm and a width of 5cm to obtain the sanitary towel chip.
The sanitary napkin has a surface layer, is made of pure cotton spunlace cloth, and has a gram weight of 100g/m2And the sanitary napkin core of comparative example 1 disposed below the top sheet, and the absorbent layer disposed below the sanitary napkin core, the absorbent layer comprising an absorbent body 1 (a bamboo fiber gauze having a product number of C40 x 40 x 88 x 64 x 56, supplied by taian, moisturizing textile co., ltd.) and an absorbent body 2 (produced by shandono noel biotechnology co., ltd.) disposed below the absorbent body 1NR-VS-01 type water-absorbent resin for sanitary napkin) and a base film (PE film produced by Fuchanong packaging materials Ltd., Shenzhen, having a grammage of 50 g/m) provided below the absorbent layer2) And release paper (white glassine release paper produced by Shanghai Rusin industries, Ltd., gram weight 80 g/m)2) And a coating film (a low-density polyethylene coating film of MODEL MODEL XP 39385 produced by Ethyl company and with the thickness of 0.025mm) arranged below the release paper and a quick-release sticker (provided by Jinbaoli sanitary products, Inc. of Quanzhou city) arranged below the coating film. The surface layer, the sanitary napkin core sheet of comparative example 1, the absorbing layer, the bottom film, the release paper, the envelope and the quick-release adhesive were prepared according to the conventional process of sanitary napkins to obtain the sanitary napkin.
Example 5
The nano silver antibacterial sanitary towel has a structure of a surface layer, is made of pure cotton spunlaced cloth and has the gram weight of 100g/m2A nano silver chip arranged below the surface layer, and an absorption layer arranged below the nano silver chip, wherein the absorption layer comprises an absorber 1 (bamboo fiber gauze with the product number of C40 x 40 x 88 x 56 provided by Runfan textile Co., Ltd.), an absorber 2 (water-absorbing resin for a sanitary towel of NR-VS-01 type produced by Shandong Noll Biotech Co., Ltd.) arranged below the absorber 1, and a bottom film (PE film produced by Shenzhen Konfan packaging Material Co., Ltd., gram weight 50 g/m)2) And release paper (white glassine release paper produced by Shanghai Rusin industry Co., Ltd., gram weight 80 g/m)2) And a coating film (a low-density polyethylene coating film of MODEL MODEL XP 39385 produced by Ethyl company and with the thickness of 0.025mm) arranged below the release paper and a quick-release sticker (provided by Jinbaoli sanitary products, Inc. of Quanzhou city) arranged below the coating film. And preparing the surface layer, the nano-silver chip, the absorption layer, the bottom film, release paper, the coating film and the quick and easy sticker according to a conventional process of the sanitary towel to obtain the nano-silver sanitary towel.
The nano-silver chip is prepared by the following method:
(1) soaking 150 parts by weight of non-woven fabric in water at 45 ℃ for 40min, wherein the weight of the non-woven fabric is 3.5 wt% of the water, and washing with water for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the weight of the non-woven fabric is 21 wt% of the bacteriostatic finishing liquid;
(3) irradiating the non-woven fabric impregnated with the antibacterial finishing liquid for 45min under ultraviolet rays;
(4) steaming the non-woven fabric irradiated by the ultraviolet rays for 40min under the conditions that the temperature is 110 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 3 times;
(6) drying the washed non-woven fabric at 75 ℃; soaking the fabric in the hydrophilic finishing liquid for 20min according to the bath ratio of 1:15g/mL, and controlling the rolling allowance rate to be 90%; baking at 75 deg.C for 3min, and baking at 120 deg.C for 10 min; and rolling the dried non-woven fabric into a thickness of 0.5cm, and cutting the non-woven fabric into a length of 15cm and a width of 5cm to obtain the nano-silver chip.
The concentration of the cellulase aqueous solution is 1.2 g/L.
The preparation method of the antibacterial finishing liquid comprises the following steps: (a) drying cocoa bean shells at 40 ℃, crushing and grinding the dried cocoa bean shells into powder, wherein the particle size of the ground particles is 80 meshes to obtain cocoa bean shell powder for later use; (b) mixing cocoa shell powder with 70 wt% ethanol water solution according to the weight ratio of 1: 50, heating with microwave for 6min, filtering the extractive solution with filter paper, centrifuging the filtrate in a centrifuge, and collecting supernatant as cacao bean husk extract; (c) taking 15 parts of silver nitrate, 120 parts of cocoa shell extract, 60 parts of water-soluble sophora alopecuroide powder and 1200 parts of water for later use; (d) adding cacao bean husk extract into water, controlling stirring speed at 120r/min, and stirring for 15 min; then adding silver nitrate, controlling the stirring speed to be 60r/min, and stirring for 30 min; and finally, adding water-soluble sophora alopecuroide powder with the particle size of 100 meshes, controlling the stirring speed to be 90r/min, stirring for 15min, and filtering to obtain the antibacterial finishing liquid.
The preparation method of the hydrophilic finishing liquid comprises the following steps: dissolving 8g of trehalose and 18g of raffinose in 600mL of water, adding 50g of sodium periodate twice under the stirring condition, namely adding 25g of sodium periodate for the first time, and adding 25g of sodium periodate again after 5min each; and then reacting for 6 hours at room temperature in the dark, adding 30g of barium chloride, stirring for 10 hours at 5 ℃, and filtering to obtain filtrate, namely the hydrophilic finishing liquid.
Test example 1
The indices of the sanitary napkins of the above embodiments were tested with reference to GB/T15979-2002 hygienic Standard for Disposable sanitary articles-appendix B. At least 12 minimum sales package samples were drawn in two shipping packages of the same lot, 1/4 samples for testing, 1/4 samples for leave samples, and 1/2 samples for review if necessary. Sampled minimum sales packages should not be ruptured and should not be opened before inspection. At least 3 packages for testing were opened aseptically under grade 100 decontamination conditions, samples were taken from each package, and 10 g. + -.1 g of sample was accurately weighed. Shearing, adding into 200ml sterilized normal saline, and mixing to obtain a normal saline sample solution. The liquid product is directly used as a sample liquid by using the stock solution. The test results were averaged over multiple measurements and are shown in table 1.
Table 1: and (5) testing the product hygiene index.
The pathogenic pyogenic bacteria refer to Pseudomonas aeruginosa, Staphylococcus aureus and hemolytic streptococcus.
The lower the total number of bacterial colonies detected by the product sanitation index is, the better the sanitation index is. The results of the tests of example 1 and example 4 reach the standard of the sanitary product in the menstrual period of the general grade women, and the standard of the sanitary product in the menstrual period of the disinfection grade women is reached in example 3.
Test example 2
The test of the bacteriostatic performance of the invention is carried out according to GB/T15979-2002 hygienic Standard for Disposable sanitary articles-appendix C-C4 test method of the bacteriostatic performance of the dissolution type anti (bacteriostatic) bacteria product. At least 5 of three transport packages in the same batch are randomly extracted for bacteriostatic performance test, 4 sample pieces with the specification of 2.0cm multiplied by 3.0cm are taken, and each group of test is repeated for 3 times. The microorganism is selected from Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 25922); the yeast was Candida albicans (ATCC 10231), and the test results were averaged over several measurements, as shown in Table 2.
Table 2: and (5) testing the bacteriostatic performance.
The bacteriostatic rate is more than or equal to 50-90%, the product has bacteriostatic action, the bacteriostatic rate is more than or equal to 90%, and the product has strong bacteriostatic action. Examples 1 to 2 had bacteriostatic action, and examples 3 to 4 had strong bacteriostatic action. The non-woven fabric is soaked in the cellulase aqueous solution in advance, the roughness and the surface area of the non-woven fabric are increased through enzyme etching, the bacteriostatic finishing liquid can be uniformly and better adsorbed, the migration of nano silver particles is limited, and the silver nitrate remained on the surface of the non-woven fabric is uniformly reduced into silver nano particles through ultraviolet chemical reduction without agglomeration, so that the bacteriostatic effect of the nano silver chip is improved. The silver ions adsorbed on the surface of the non-woven fabric are slowly reduced by adopting a steaming method, so that the dispersibility of the nano-silver on the surface of the non-woven fabric is improved, and the antibacterial performance of the nano-silver chip is enhanced. The method combines ultraviolet chemical reduction and steaming reduction, and the prepared nano silver chip obtains the best antibacterial effect.
Test example 3
The Zeta potential test adopts an electrophoresis method, the antibacterial finishing liquid in each example is taken, 0.5mL of each group is put in an electric micro-electrophoresis cell, the pH value of the solution environment is 7, 10 groups of data in each example are measured, and the results are averaged. Zeta potential was measured using a Zetasizer Pro tester manufactured by Marvens Pasnake, Inc., and the average of the results of the tests was taken and shown in Table 3.
Table 3: zeta potential test results.
| Kind of product | Zeta potential mV |
| Example 1 | -15.8 |
| Example 2 | -14.7 |
| Example 3 | -32.4 |
The value of the Zeta potential is related to the stability of the colloidal dispersion. The Zeta potential is a measure of the strength of the mutual repulsion or attraction between particles. The smaller the molecule or dispersed particle, the higher the absolute value of the Zeta potential, the more stable the system, i.e. the dissolution or dispersion can resist aggregation. Conversely, the lower the Zeta potential, the more prone it is to coagulation or coagulation, i.e., the attractive force exceeds the repulsive force, and the dispersion is broken and coagulation or coagulation occurs. As can be seen from the test results in table 3, the bacteriostatic finishing liquid in example 3 has good dispersibility, which may be due to the fact that the polyphenol substance in the cocoa shell extract introduces hydroxyl groups on the surface of the reduced nano silver particles, and the hydroxyl groups are typical polar groups, and can form hydrogen bonds with water, thereby improving the dispersibility of the nano silver particles in the finishing liquid and preventing coagulation or coagulation. Generally speaking, the absolute value of the Zeta potential is more than 50mV, so that obvious cytotoxicity is achieved, even tissue toxicity is achieved, and the absolute value of the Zeta potential value of each example is less than 50mV, so that the cytotoxicity is avoided while the antibacterial effect is improved by keeping good dispersibility as in example 3.
Test example 4
Permeability tests were performed on the nano-silver chips prepared in examples 3 and 5, and the specific test method refers to measurement of liquid penetration time (simulated urine) in part 8 of GB/T2418.8-2010 textile non-woven fabric test method, and the test results were averaged over a number of measurements, and the results are shown in table 4.
TABLE 4 permeation performance of nano-silver chips
| Penetration time, s | |
| Example 3 | 1.41 |
| Example 4 | 0.92 |
Claims (5)
1. A nano-silver sanitary towel is composed of a surface layer, a nano-silver chip, an absorption layer, a bottom film, a release paper layer, a coating film and a quick and easy sticker which are sequentially stacked from top to bottom, and is characterized in that the preparation method of the nano-silver chip is as follows:
(1) soaking the non-woven fabric in a cellulase water solution at 40-50 ℃ for 20-50 min, and washing with water for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 15-30 ℃ for 60-150 min;
(3) irradiating the non-woven fabric subjected to antibacterial finishing for 40-50 min under ultraviolet rays with the wavelength of 200-350 nm;
(4) steaming the non-woven fabric subjected to ultraviolet irradiation for 35-40 min under the conditions that the temperature is 110-120 ℃ and the relative humidity is 100%;
(5) washing the steamed non-woven fabric with water for 1-3 times;
(6) drying the washed non-woven fabric at 60-80 ℃; soaking the fabric in a hydrophilic finishing liquid for 10-30 min according to a bath ratio of 1 (10-20) g/mL, and controlling the rolling residual rate to be 70-90%; drying at 60-80 ℃ for 1-5 min, and then drying at 110-120 ℃ for 3-10 min; and rolling the dried non-woven fabric into a proper thickness, and cutting into proper widths to obtain the nano-silver chip.
2. The nano-silver sanitary napkin of claim 1, wherein the weight of the non-woven fabric in the step (1) is 3-5 wt% of the cellulase aqueous solution; the concentration of the cellulase aqueous solution is 1.2-2.4 g/L.
3. The nano-silver sanitary napkin according to claim 1, wherein the weight of the non-woven fabric in the step (2) is 18-27 wt% of the bacteriostatic finishing liquid.
4. The nano-silver sanitary napkin according to claim 1, wherein the bacteriostatic finishing liquid is prepared by the following steps:
(a) drying cocoa bean shells at 40-50 ℃, crushing and grinding the dried cocoa bean shells into powder, wherein the particle size of the ground particles is 60-80 meshes, so as to obtain cocoa bean shell powder for later use;
(b) mixing cocoa shell powder with 65-80 wt% of ethanol water solution according to a weight ratio of 1: (45-60), heating for 5-8 min by microwave, filtering the extracting solution, centrifuging the filtrate, and obtaining supernatant fluid which is the cocoa shell extract;
(c) taking 10-30 parts of silver nitrate, 120-180 parts of cocoa shell extract, 60-90 parts of water-soluble sophora alopecuroide powder and 1000-2000 parts of water by weight for later use;
(d) adding the cocoa bean hull extract into water, controlling the stirring speed to be 90-120 r/min, and stirring for 10-15 min; then adding silver nitrate, controlling the stirring speed to be 45-60 r/min, and stirring for 30-60 min; and finally, adding water-soluble sophora alopecuroide powder, controlling the stirring speed to be 60-90 r/min, stirring for 10-15 min, and filtering to obtain the antibacterial finishing liquid.
5. The nano-silver sanitary napkin according to claim 1, wherein the hydrophilic finishing liquid is prepared by a method comprising: dissolving 5-10 g of trehalose and 15-25 g of raffinose in 300-1000 mL of water, and adding 40-60 g of sodium periodate twice under the stirring condition; and then reacting for 4-10 hours at room temperature in a dark condition, adding 25-40 g of barium chloride, stirring for 4-10 hours at 5-10 ℃, and filtering to obtain filtrate, namely the hydrophilic finishing liquid.
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