CN114892407A - Nano-silver chip and nano-silver sanitary towel - Google Patents
Nano-silver chip and nano-silver sanitary towel Download PDFInfo
- Publication number
- CN114892407A CN114892407A CN202210534885.8A CN202210534885A CN114892407A CN 114892407 A CN114892407 A CN 114892407A CN 202210534885 A CN202210534885 A CN 202210534885A CN 114892407 A CN114892407 A CN 114892407A
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- China
- Prior art keywords
- nano
- silver
- woven fabric
- water
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
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- D06M13/152—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen having a hydroxy group bound to a carbon atom of a six-membered aromatic ring
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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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
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Abstract
The invention discloses a nano-silver chip and a nano-silver sanitary towel. The production of the nano silver chip comprises the steps of surface treatment of non-woven fabric, impregnation in bacteriostatic finishing liquid, irradiation under ultraviolet rays, steaming and washing, drying and cutting. The invention also provides a preparation method of the antibacterial finishing liquid, which comprises 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 in parts by weight. 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, so that the cocoa bean hull extract and the nano silver particles jointly play an excellent antibacterial property in the sanitary towel.
Description
Technical Field
The invention relates to the technical field of absorption pads, in particular to a nano-silver chip and a nano-silver 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. Therefore, the provision of the sanitary napkin with the nano-silver antibacterial function, which has the advantages of short production period, low production cost and low energy consumption, is important.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to provide a nano-silver chip and a nano-silver sanitary napkin, so as to meet the bacteriostatic requirements of the sanitary napkin product.
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.
In order to achieve the purpose, the invention provides a production method of a nano silver chip, which is characterized by comprising 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 dosage 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 use amount 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 irradiated by the ultraviolet rays 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.
The invention also provides a nano silver chip manufactured by the preparation method.
The invention also provides a nano-silver sanitary towel which is composed of a surface layer, the nano-silver chip, an absorption layer, a bottom film, a release paper layer, a coating film and a quick and easy paste which are sequentially overlapped from top to bottom.
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. After melting, the solution was a pale yellow liquid, and after solidification, the solution was still white. 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.
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 by the antibacterial finishing liquid is irradiated under ultraviolet rays, and is chemically reduced by the ultraviolet rays, so that silver nitrate remaining on the surface of the non-woven fabric can be further and uniformly generated into silver nanoparticles without agglomeration, and the antibacterial effect of the 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 Seishenhouse 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/m 2 Model 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 dosage 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 dosage 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 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; 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 sanitary napkin with nano silver has a surface layer, is made of pure cotton spunlace cloth, and has a gram weight of 100g/m 2 And 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 layer 2 ) 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. Applying the surface layerThe sanitary napkin with the bacteriostatic function is prepared by the nano-silver chip, the absorption layer, the bottom film, the release paper, the coating film and the quick and easy sticker in the example 1 according to the conventional process of the sanitary napkin.
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 dosage 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 use amount 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 sanitary towel has a surface layer, is made of pure cotton spunlaced cloth and has a gram weight of 100g/m 2 And 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 comprising an absorbent 1 (a bamboo fiber gauze having a product number of C40 x 40 x 88 x 64 x 56, supplied by taian, wet cotton textile co., ltd.) and an absorbent 2 disposed under the absorbent 1 (a sanitary napkin of NR-VS-01 type manufactured by shandong norl biotechnology co., ltd.)Water-absorbent resin) and a bottom film (PE film produced by Fuchang packaging materials Ltd, Shenzhen, with a grammage of 50 g/m) arranged below the absorbing layer 2 ) 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 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 for later use, wherein the dosage of the non-woven fabric is 3.5 wt% of the cellulase aqueous solution;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the use amount 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 sanitary towel has a surface layer, is made of pure cotton spunlaced cloth and has a gram weight of 100g/m 2 And 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 layer 2 ) 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 (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, and washing the non-woven fabric with water, wherein the dosage of the non-woven fabric is 3.5 wt% of the water for later use;
(2) dipping the dipped non-woven fabric in bacteriostatic finishing liquid at 20 ℃ for 80min, wherein the use amount 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 sanitary towel has a surface layer, is made of pure cotton spunlaced cloth and has a gram weight of 100g/m 2 And the nano-silver chip of example 4 disposed under the surface 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, takan) and an absorbent disposed under the absorbent 1A collector 2 (made of NR-VS-01 water-absorbent resin for sanitary napkin produced by Shandong Noll Biotech Co., Ltd.) and a bottom film (made of PE film produced by Shenzhen Fuhang packaging Material 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 ) 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 the 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, and washing the non-woven fabric with water, wherein the dosage of the non-woven fabric is 3.5 wt% of the 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/m 2 And the sanitary napkin core of comparative example 1 disposed below the top sheet, and the absorbent layer disposed below the sanitary napkin core, wherein the absorbent layer comprises an absorbent body 1 (made of bamboo fiber gauze of a product number C40 x 40 x 88 x 64 x 56, available from taian moisturizing textile co., ltd.) and an absorbent body 2 (made of NR-VS-01 type water-absorbent resin, manufactured by shandonol biotechnology co., ltd.) disposed below the absorbent body 1, and the absorbent layer is disposedA bottom film (PE film produced by Fuchang packaging materials Ltd, Shenzhen, with a grammage of 50 g/m) below the absorption layer 2 ) 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.
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 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 carrying out 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 is selected from Candida albicans (ATCC 10231), and the test results are 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 test results are 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.
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. The production method of the nano-silver chip is characterized by comprising the following steps:
(1) dipping the non-woven fabric in a cellulase water solution, and washing with water for later use;
(2) dipping the dipped non-woven fabric in the antibacterial finishing liquid;
(3) irradiating the non-woven fabric dipped with the antibacterial finishing liquid under ultraviolet rays;
(4) steaming the non-woven fabric subjected to ultraviolet irradiation;
(5) washing the steamed non-woven fabric with water;
(6) and drying the washed non-woven fabric, rolling into a proper thickness, and cutting into proper widths to obtain the nano-silver chip.
2. The method for producing nano-silver chips according to claim 1, comprising the steps of:
(1) soaking 100-300 parts by weight of non-woven fabric in 40-50 ℃ cellulase water solution 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 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.
3. The method for producing a nano-silver chip according to claim 1, wherein: the concentration of the cellulase aqueous solution is 1.2-2.4 g/L.
4. The production method of the nano-silver chip according to claim 1, wherein 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 for 5-8 min by microwave, filtering the extracting solution, centrifuging the filtrate, and obtaining the 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.
5. The method for producing nano-silver chips according to claim 4, wherein: in the step (b), the cocoa bean hull powder and 70 wt% ethanol water solution are mixed according to the weight ratio of 1: 50, heating with microwave for 6min, filtering the extractive solution, and centrifuging to obtain cocoa shell extract.
6. The nano-silver chip manufactured by the method for manufacturing a nano-silver chip according to any one of claims 1 to 5.
7. A sanitary napkin containing nano-silver, which comprises a surface layer, a nano-silver chip as claimed in claim 6, an absorbing layer, a bottom film, a release paper layer, a coating film and a quick-release adhesive layer, wherein the surface layer, the nano-silver chip, the absorbing layer, the bottom film, the release paper layer, the coating film and the quick-release adhesive layer are sequentially laminated from top to bottom.
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| JP2012246595A (en) * | 2011-05-26 | 2012-12-13 | Bmc Green Chemical Co Ltd | Method for producing antibacterial hygiene nonwoven fabric, and antibacterial hygiene nonwoven fabric using the same |
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| CN106901904A (en) * | 2017-02-19 | 2017-06-30 | 嫒赟（上海）生物科技股份有限公司 | Nano silver antibacterial chip and its production method and the sanitary napkin with nano silver antibacterial function |
| CN113413269A (en) * | 2021-06-21 | 2021-09-21 | 嫒赟（上海）生物科技股份有限公司 | Bacteriostatic sanitary towel and preparation method thereof |
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| JP2012246595A (en) * | 2011-05-26 | 2012-12-13 | Bmc Green Chemical Co Ltd | Method for producing antibacterial hygiene nonwoven fabric, and antibacterial hygiene nonwoven fabric using the same |
| CN105839419A (en) * | 2016-05-12 | 2016-08-10 | 武汉纺织大学 | Preparation method of polyphenol modified nano-silver carrying antibacterial fabric |
| CN106758216A (en) * | 2016-12-02 | 2017-05-31 | 辽东学院 | A kind of processing method of antibacterial, uvioresistant bafta |
| CN106901904A (en) * | 2017-02-19 | 2017-06-30 | 嫒赟（上海）生物科技股份有限公司 | Nano silver antibacterial chip and its production method and the sanitary napkin with nano silver antibacterial function |
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