CN115381999A - Breathable sanitary towel and preparation method thereof - Google Patents
Breathable sanitary towel and preparation method thereof Download PDFInfo
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- CN115381999A CN115381999A CN202211178353.1A CN202211178353A CN115381999A CN 115381999 A CN115381999 A CN 115381999A CN 202211178353 A CN202211178353 A CN 202211178353A CN 115381999 A CN115381999 A CN 115381999A
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- breathable
- hollow carbon
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- palladium
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- 238000002360 preparation method Methods 0.000 title claims abstract description 64
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000010410 layer Substances 0.000 claims abstract description 108
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000002134 carbon nanofiber Substances 0.000 claims abstract description 71
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 56
- 239000002114 nanocomposite Substances 0.000 claims abstract description 47
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 38
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- -1 polypropylene Polymers 0.000 claims abstract description 15
- 239000002344 surface layer Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 52
- 210000004379 membrane Anatomy 0.000 claims description 35
- 239000012528 membrane Substances 0.000 claims description 35
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 27
- 239000004698 Polyethylene Substances 0.000 claims description 20
- 229920000573 polyethylene Polymers 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000004088 foaming agent Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000009987 spinning Methods 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 8
- 238000010041 electrostatic spinning Methods 0.000 claims description 7
- 238000007731 hot pressing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 210000002469 basement membrane Anatomy 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 3
- 239000004626 polylactic acid Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 abstract 1
- 229920001155 polypropylene Polymers 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 238000005187 foaming Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 230000003821 menstrual periods Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 235000019633 pungent taste Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 210000004722 stifle Anatomy 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
-
- 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
-
- 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
-
- 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
-
- 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
- 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
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
- A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
- A61F2013/15544—Permeability
- A61F2013/15552—Air permeability
-
- 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
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hematology (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The application relates to the technical field of sanitary products, and particularly discloses a breathable sanitary towel and a preparation method thereof. The breathable sanitary towel comprises a surface layer, an absorption layer and a bottom layer which are sequentially laminated from top to bottom, and is characterized in that the bottom film is a nano composite film, and the nano composite film comprises a breathable layer and a base layer; the breathable layer is prepared from the following raw materials in parts by weight: 200-300 parts of polypropylene and 30-50 parts of palladium modified hollow carbon nanofiber, wherein the palladium modified hollow carbon nanofiber is prepared by the following steps: dispersing 8-15 parts of metal palladium in 150-250 parts of polyvinyl alcohol solution, then soaking 50-100 parts of unmodified hollow carbon nanofibers in the polyvinyl alcohol solution mixed with the metal palladium, taking out the soaked hollow carbon nanofibers, draining, and naturally drying to obtain the palladium modified hollow carbon nanofibers. The breathable sanitary towel can be used for producing sanitary products and has the advantage of good breathability.
Description
Technical Field
The application relates to the technical field of sanitary products, in particular to a breathable sanitary towel and a preparation method thereof.
Background
The sanitary towel is a sanitary product used in the menstrual period of women, the air permeability is an important consideration for female consumers to select the sanitary towel, and the air permeability sanitary towel can reduce the stuffiness of users after long-term use.
At present, a related sanitary napkin, such as chinese patent with publication number CN203647587U, discloses a sanitary napkin, which comprises a net surface layer, a water absorption layer and a PE film bottom layer, wherein the water absorption layer is positioned between the net surface layer and the PE film bottom layer, and has the effect of preventing side leakage.
In view of the above-mentioned related arts, the inventor believes that since the material of the bottom layer of the sanitary napkin plays a crucial role in the breathability of the sanitary product, the bottom layer of the related sanitary napkin often uses a PE film to make it liquid-tight, but the breathability of the PE film is general, and thus, the user feels stuffy.
Disclosure of Invention
In order to improve the air permeability of a basement membrane and reduce the stuffy feeling of a sanitary towel user during use, the application provides an air permeable sanitary towel and a preparation method thereof.
In a first aspect, the present application provides a breathable sanitary napkin, which adopts the following technical scheme:
a breathable sanitary towel comprises a surface layer, an absorption layer and a bottom layer which are sequentially laminated from top to bottom, and is characterized in that the bottom film is a nano composite film, and the nano composite film comprises a breathable layer and a base layer;
the breathable layer is prepared from the following raw materials in parts by weight:
200-300 parts of Polyethylene (PE),
30-50 parts of palladium modified hollow carbon nano fiber,
the palladium modified hollow carbon nanofiber is prepared by the following steps:
dispersing 8-15 parts of metal palladium in 150-250 parts of polyvinyl alcohol solution, then soaking 50-100 parts of unmodified hollow carbon nanofibers in the polyvinyl alcohol solution mixed with the metal palladium for pretreatment, taking out the soaked hollow carbon nanofibers, draining, and naturally drying to obtain the palladium modified hollow carbon nanofibers.
By adopting the technical scheme, in the polyethylene melt spinning process, the palladium modified hollow carbon nanofiber is added, the obtained breathable layer is breathable and impermeable, the hollow carbon nanofiber provides a passage for gas to pass through, and meanwhile, after the hollow carbon nanofiber is modified by palladium, metal palladium can be attached to the inner wall and the outer wall of the hollow carbon nanofiber under the bonding of polyvinyl alcohol.
Preferably, the solution of polyvinyl alcohol comprises the following preparation steps: adding 2-5 parts of polyvinyl alcohol crystals into 250-350 parts of deionized water, heating to 85 ℃ in a water bath at constant temperature, stirring until the polyvinyl alcohol crystals are completely dissolved, adding 25-35 parts of 20% nitric acid solution, and stirring to obtain the polyvinyl alcohol solution.
By adopting the technical scheme, the metal palladium is firstly dispersed in the polyvinyl alcohol solution, which is beneficial to improving the dispersibility of the metal palladium; the nitric acid solution promotes polyvinyl alcohol solution and metal palladium to enter the inner wall of the hollow carbon nanofiber, the polyvinyl alcohol solution can bond the metal palladium on the inner wall of the hollow carbon nanofiber, the inner diameter of the hollow carbon nanofiber is reduced, the condition that water passes through is reduced, only gas can pass through the hollow carbon nanofiber, the effect that the gas is only permeable and impermeable is achieved, and the polyvinyl alcohol on the outer wall of the hollow carbon nanofiber can further enhance the bonding effect between the hollow carbon nanofiber and polyethylene.
Preferably, the particle size of the metal palladium is 30-40nm, and the inner diameter of the hollow carbon nanofiber is 50-80nm.
By adopting the technical scheme, the particle size of the metal palladium and the inner diameter of the hollow carbon nanofiber are within the range, so that the prepared palladium modified hollow carbon nanofiber has good air permeability when being prepared into the air permeable layer.
Preferably, the air-permeable layer further comprises 3-6 parts of a foaming agent, and the foaming agent is nano calcium carbonate.
By adopting the technical scheme, the nano calcium carbonate serving as a foaming agent can be heated and foamed in the hot pressing process of the composite membrane, the nano calcium carbonate is increased in volume and extrudes the hollow carbon nanofibers in the foaming process, so that the hollow carbon nanofibers form a special tortuous channel under the extrusion action, the prepared nano composite membrane is softer in texture, and the effect that the nano composite membrane is only breathable and waterproof is further improved; and under the effect of foamer, one side that ventilative layer is close to the basic unit produces a plurality of little archs because of the foaming, makes to joint each other between ventilative layer and the basic unit, reduces to appear the condition of alternate segregation between ventilative layer and the basic unit.
Preferably, the particle size of the nano calcium carbonate is 100-120nm.
Through adopting above-mentioned technical scheme, nano calcium carbonate can play the effect of filler, when improving the gas permeability on ventilative layer, reduces nano composite film's cost, and nano calcium carbonate's particle diameter is the value in this scope, can produce suitable bubble distribution in nano composite film, makes nano composite film have better gas permeability and pliability.
Preferably, the base material is a cotton fiber net, and the pore diameter of the cotton fiber net is 200-300nm.
By adopting the technical scheme, the base material adopts the cotton fiber net, the aperture of the cotton fiber net is 200-300nm, the flexibility of the nano composite film is ensured while the air permeability of the air permeable layer is not influenced, and the nano composite film is not easy to tear.
In a second aspect, the present application provides a method for preparing a breathable sanitary napkin, which adopts the following technical scheme:
a method of making a breathable sanitary napkin, comprising the steps of:
s1, preparing a surface layer: the surface layer is made of polylactic acid non-woven fabric;
s2, preparing an absorption layer: the absorption layer is composed of high water absorption resin;
s3, preparing a base film: the base membrane is a nano composite membrane, the nano composite membrane comprises a breathable layer and a base layer, the breathable layer is attached to the base layer, and one side of the breathable layer, which is far away from the base layer, is subjected to hot pressing, so that the breathable layer and the base layer are bonded with each other, and the nano composite membrane is obtained;
and S4, sequentially stacking and compounding the surface layer, the absorption layer and the bottom film to obtain the breathable sanitary towel.
By adopting the technical scheme, in the using process, liquid permeates the surface layer and is quickly absorbed by the absorption layer, the base film can block liquid leakage and also can ensure good air permeability, the stuffiness feeling of a user is reduced, and the air permeability is improved; in the hot pressing process, the foaming agent reaches the decomposition temperature for foaming, so that the connection strength and flexibility between layers of the nano composite film are improved.
Preferably, the air-permeable layer comprises the following preparation steps: melting polyethylene at 85-95 deg.C, adding other materials of the air-permeable layer, performing ultrasonic dispersion to obtain spinning solution, and performing electrostatic spinning to obtain air-permeable layer.
By adopting the technical scheme, after the polyethylene, the palladium modified hollow carbon nanofiber and the foaming agent are stretched into filaments by the electrostatic spinning technology, the prepared breathable layer has the breathable and waterproof effects.
In summary, the present application has the following beneficial effects:
1. because this application adopts palladium modified hollow carbon nanofiber, hollow carbon nanofiber is through palladium modified back, and metal palladium can be under the bonding of polyvinyl alcohol, attached to hollow carbon nanofiber inner wall and outer wall, because metal palladium can the absorbed gas to in the use, can receive the influence of human body temperature, along with gas is emitted in the temperature rise, make gas discharge fast through hollow carbon nanofiber, reduce user's stifle hotness, improve the gas permeability.
2. In the application, nano calcium carbonate is preferably used as a foaming agent, and can be heated and foamed in the hot pressing process of the composite membrane, so that the nano calcium carbonate is increased in volume and extrudes the hollow carbon nanofibers in the foaming process, the hollow carbon nanofibers form a special tortuous channel under the extrusion action, the prepared nano composite membrane is softer in texture, and the effect that the nano composite membrane is only breathable and waterproof is further improved; and under the effect of foaming agent, the ventilative layer is close to one side of basic unit and produces a plurality of little archs because of the foaming, makes to form the effect of mutual joint between ventilative layer and the basic unit, reduces the condition that appears alternate segregation between ventilative layer and the basic unit.
3. According to the method, after polyethylene is melted at the temperature of 85-95 ℃, other raw materials of the breathable layer are added, the spinning solution is obtained through ultrasonic dispersion, and the breathable layer is obtained through electrostatic spinning of the spinning solution, so that the manufactured breathable layer has the effects of breathability and impermeability.
Detailed Description
The present application will be described in further detail with reference to examples.
The starting materials in the examples of the present application are all commercially available.
Nitric acid with the mass percentage concentration of 20 percent.
The length of the hollow carbon nanofiber is 30 +/-5 mu m.
Preparation examples
Preparation example 1
A breathable layer of a nanocomposite film, comprising the steps of:
melting 250kg of polyethylene at 90 ℃, adding 40kg of palladium modified hollow carbon nanofiber, performing ultrasonic dispersion for 15min to obtain a spinning solution, and performing electrostatic spinning on the spinning solution to obtain a breathable layer;
the palladium modified hollow carbon nanofiber is prepared by the following steps:
dispersing 10kg of metal palladium in 200kg of polyvinyl alcohol solution, wherein the particle size of the metal palladium is 35nm, then soaking 80kg of unmodified hollow carbon nanofibers in the polyvinyl alcohol solution mixed with the metal palladium for pretreatment, taking out the soaked hollow carbon nanofibers, draining, and naturally drying to obtain palladium modified hollow carbon nanofibers, wherein the inner diameter of the unmodified hollow carbon nanofibers is 60 nm;
the solution of polyvinyl alcohol comprises the following preparation steps: adding 3kg of polyvinyl alcohol crystals into 300kg of deionized water, heating to 85 ℃ in a water bath at constant temperature, stirring until the polyvinyl alcohol crystals are completely dissolved, adding 30kg of 20% nitric acid solution, and stirring to obtain the polyvinyl alcohol solution.
Preparation example 2
A breathable layer of a nanocomposite film, comprising the steps of:
melting 200kg of polyethylene at 85 ℃, adding 30kg of palladium modified hollow carbon nanofiber, performing ultrasonic dispersion for 15min to obtain a spinning solution, and performing electrostatic spinning on the spinning solution to obtain a breathable layer.
The palladium modified hollow carbon nanofiber is prepared by the following steps:
dispersing 8kg of metal palladium in 150kg of polyvinyl alcohol solution, wherein the particle size of the metal palladium is 30nm, then soaking 50kg of unmodified hollow carbon nanofibers in the polyvinyl alcohol solution mixed with the metal palladium for pretreatment, taking out the soaked hollow carbon nanofibers, draining, and naturally drying to obtain palladium modified hollow carbon nanofibers, wherein the inner diameter of the unmodified hollow carbon nanofibers is 50 nm;
the solution of polyvinyl alcohol comprises the following preparation steps: adding 2kg of polyvinyl alcohol crystals into 250kg of deionized water, heating to 85 ℃ in a water bath at constant temperature, stirring until the polyvinyl alcohol crystals are completely dissolved, adding 25kg of 20% nitric acid solution, and stirring to obtain the polyvinyl alcohol solution.
Preparation example 3
A breathable layer of a nanocomposite film, comprising the steps of:
melting 300kg of polyethylene at 95 ℃, adding 50kg of palladium modified hollow carbon nanofibers, performing ultrasonic dispersion for 15min to obtain a spinning solution, and performing electrostatic spinning on the spinning solution to obtain a breathable layer.
The palladium modified hollow carbon nanofiber is prepared by the following steps:
dispersing 15kg of metal palladium in 250kg of polyvinyl alcohol solution, wherein the particle size of the metal palladium is 40nm, then soaking 100kg of unmodified hollow carbon nanofibers in the polyvinyl alcohol solution mixed with the metal palladium for pretreatment, taking out the soaked hollow carbon nanofibers, draining, and naturally drying to obtain palladium modified hollow carbon nanofibers, wherein the inner diameter of the unmodified hollow carbon nanofibers is 80 nm;
the solution of polyvinyl alcohol comprises the following preparation steps: adding 5kg of polyvinyl alcohol crystals into 350kg of deionized water, heating to 85 ℃ in a water bath at constant temperature, stirring until the polyvinyl alcohol crystals are completely dissolved, adding 35kg of 20% nitric acid solution, and stirring to obtain the polyvinyl alcohol solution.
Preparation example 4
A gas-permeable layer of a nanocomposite membrane, which is different from preparation example 1 in that the amount of nitric acid solution used was 0kg.
Preparation example 5
A gas permeable layer of a nanocomposite membrane, which is different from that of preparation example 1 in that the particle diameter of metallic palladium is 20nm.
Preparation example 6
A gas permeable layer of a nanocomposite membrane, which is different from that of preparation example 1 in that the particle size of metallic palladium is 60nm.
Preparation example 7
A permeable layer of a nanocomposite membrane, which is different from that of preparation example 1 in that the inner diameter of a hollow carbon nanofiber is 35 nm.
Preparation example 8
A permeable layer of a nanocomposite membrane, which is different from that of preparation example 1 in that the inner diameter of hollow carbon nanofibers is 100 nm.
Preparation example 9
The difference between the permeable layer of the nano composite membrane and the preparation example 1 is that 5kg of nano calcium carbonate is added as a foaming agent into the permeable layer, the particle size of the nano calcium carbonate is 110nm, the nano calcium carbonate and palladium modified hollow carbon nanofiber are added into molten polyethylene together, and other steps are the same as the preparation example 1.
Preparation example 10
The difference between the permeable layer of the nano composite membrane and the preparation example 1 is that 3kg of nano calcium carbonate is added as a foaming agent into the permeable layer, the particle size of the nano calcium carbonate is 100nm, the nano calcium carbonate and palladium modified hollow carbon nanofiber are added into molten polyethylene, and other steps are the same as the preparation example 1.
Preparation example 11
An air-permeable layer of a nanocomposite membrane was different from that of preparation example 1 in that 6kg of nano calcium carbonate having a particle size of 120nm as a foaming agent was further added to the air-permeable layer, the nano calcium carbonate was added to molten polyethylene together with palladium-modified hollow carbon nanofibers, and the other steps were the same as in preparation example 1.
Preparation example 12
The difference between the air-permeable layer of a nano-composite film and that of preparation example 9 is that the particle size of nano-calcium carbonate is 80nm.
Preparation example 13
The difference between the air-permeable layer of a nano-composite film and that of preparation example 9 is that the particle size of nano-calcium carbonate is 150nm.
Comparative preparation example 1
A permeable layer of a nanocomposite membrane, which is different from preparation example 1 in that the amount of palladium-modified hollow carbon nanofibers was 0kg, and the remaining steps were the same as in preparation example 1.
Comparative preparation example 2
A breathable layer of a nanocomposite membrane, which is different from preparation example 1 in that palladium-modified hollow carbon nanofibers are replaced with the same amount of hollow carbon nanofibers, and the remaining steps are the same as in preparation example 1.
Comparative preparation example 3
A gas-permeable layer of a nanocomposite membrane, which is different from preparation example 1 in that palladium-modified hollow carbon nanofibers were replaced with equal amounts of carbon nanotubes, and the remaining steps were the same as in preparation example 1.
Examples
Example 1
A breathable sanitary napkin comprising the steps of:
s1, preparing a surface layer: the surface layer is made of polylactic acid non-woven fabric;
s2, preparing an absorption layer: the absorption layer is composed of high water absorption resin;
s3, preparing a basement membrane: the base membrane is a nano composite membrane, the nano composite membrane comprises a breathable layer and a base layer, the breathable layer is attached to the base layer, one side of the breathable layer, which is far away from the base layer, is subjected to hot pressing at the temperature of 120 ℃, so that the breathable layer and the base layer are bonded with each other, and the nano composite membrane is obtained;
and S4, sequentially stacking and compounding the surface layer, the absorption layer and the bottom film to obtain the breathable sanitary towel.
Wherein the air-permeable layer was prepared by preparation example 1, the base layer was a cotton fiber web, and the pore diameter of the cotton fiber web was 250nm.
Examples 2 to 13
A breathable sanitary napkin which is different from example 1 in that a breathable layer is obtained by successively preparing preparation examples 2 to 13, and the remaining steps are the same as in example 1.
Example 14
A breathable sanitary napkin which differs from example 9 in that the thermocompression bonding temperature in S3 is 80 ℃.
Comparative example
Comparative examples 1 to 3
A breathable sanitary napkin which was different from example 1 in that a breathable layer was obtained by successively preparing comparative preparation examples 1 to 3, and the remaining steps were the same as in example 1.
Performance test
The test comprises the following steps:
1. air permeability test
The air permeability is tested according to the method specified in GB/T5453-1997 determination of the air Permeability of textile fabrics.
2. Flexibility test
According to GB/T24218.3-2010 textile nonwoven test method part 3: the breaking elongation of the nanocomposite film was measured by the method specified in "measurement of breaking strength and breaking elongation".
The breathable sanitary napkins prepared in examples 1-14 and comparative examples 1-3 were subjected to the breathability test, and the test results are shown in table 1.
TABLE 1 test results of breathability of sanitary napkins in examples 1-14 and comparative examples 1-3
| Air transmission rate/%) | |
| Example 1 | 82.3 |
| Example 2 | 82.1 |
| Example 3 | 82.2 |
| Example 4 | 78.5 |
| Example 5 | 78.3 |
| Example 6 | 77.3 |
| Example 7 | 70.5 |
| Example 8 | 70.6 |
| Example 9 | 83.6 |
| Example 10 | 83.4 |
| Example 11 | 83.5 |
| Example 12 | 71.3 |
| Example 13 | 72.1 |
| Example 14 | 81.1 |
| Comparative example 1 | 26.3 |
| Comparative example 2 | 60.3 |
| Comparative example 3 | 55.6 |
The nanocomposite films obtained in preparation example 1 and preparation examples 9 to 13 were subjected to a flexibility test, and the test results are shown in table 2.
TABLE 2 test results of nanocomposite films prepared in preparation example 1 and preparation examples 9 to 13
| Elongation at break/% | |
| Preparation example 1 | 25 |
| Preparation example 9 | 38 |
| Preparation example 10 | 36 |
| Preparation example 11 | 37 |
| Preparation example 12 | 26 |
| Preparation example 13 | 27 |
As can be seen by combining examples 1-3 and comparative examples 1-3 with Table 1, the air permeability of examples 1-3 is better than that of comparative examples 1-3, which shows that the addition of palladium modified hollow carbon nanofibers can effectively improve the air permeability of the bottom film of the sanitary napkin and reduce the stuffy feeling of the user.
As can be seen by combining example 1 and example 4 and table 1, the permeability of example 1 is better than that of example 4, which indicates that the addition of nitric acid is favorable for metal palladium to enter the hollow carbon nanofibers, palladium has the function of absorbing gas and can exhaust gas under the influence of the body temperature, so that the gas can be rapidly exhausted from the hollow carbon nanofibers, and the stuffiness feeling of a user is reduced.
As can be seen by combining examples 1 and 5 to 8 with table 1, the air permeability of example 1 is superior to that of examples 5 to 8, and it is demonstrated that when the particle size of the metal palladium is in the range of 30 to 40nm and the inner diameter of the hollow carbon nanofiber is in the range of 50 to 80nm, the prepared palladium-modified hollow carbon nanofiber has good air permeability when being made into an air-permeable layer.
It can be seen from the combination of examples 1 and 9-13 and table 1 that examples 9-11 are superior to examples 12-13 and 1, and illustrate that the addition of nano calcium carbonate, when the spinning solution is prepared, the nano calcium carbonate does not reach the decomposition temperature, so the nano calcium carbonate only temporarily acts as a filler, when the spinning solution is hot pressed, the nano calcium carbonate reaches the decomposition temperature and acts as a foaming agent, and the bubbles expand during the foaming process to extrude the palladium modified hollow carbon nanofibers to have special air permeable channels, thereby improving the air permeability of the nanocomposite membrane.
It can be seen from the combination of example 9 and example 14 and table 1 that example 9 is better than example 14, and when the thermal compression bonding temperature is 80 ℃, the nano calcium carbonate does not reach the decomposition temperature, and the foaming effect cannot be achieved.
It can be seen by combining preparation examples 1 and 9-13 and combining table 2 that the flexibility of preparation examples 9-11 is better than that of preparation examples 12-13 and 1, which shows that the addition of nano calcium carbonate, which is used as a foaming agent, can be heated and foamed in the hot pressing process of the composite membrane, the nano calcium carbonate increases the volume and extrudes the hollow carbon nanofibers in the foaming process, so that the hollow carbon nanofibers form special tortuous channels under the extrusion effect, the prepared nano composite membrane is softer in texture, and the effect that the nano composite membrane is only breathable and waterproof is further improved; and under the effect of foaming agent, the ventilative layer produces a plurality of little archs because of the foaming on one side near the basic unit, makes mutual joint between ventilative layer and the basic unit, reduces the condition that appears alternate segregation between ventilative layer and the basic unit.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A breathable sanitary towel comprises a surface layer, an absorption layer and a bottom layer which are sequentially stacked from top to bottom, and is characterized in that a basement membrane is a nano composite membrane, and the nano composite membrane comprises a breathable layer and a base layer;
the breathable layer is prepared from the following raw materials in parts by weight:
200-300 parts of Polyethylene (PE),
30-50 parts of palladium modified hollow carbon nano fiber,
the palladium modified hollow carbon nanofiber is prepared by the following steps:
dispersing 8-15 parts of metal palladium in 150-250 parts of polyvinyl alcohol solution, then soaking 50-100 parts of unmodified hollow carbon nanofibers in the polyvinyl alcohol solution mixed with the metal palladium for pretreatment, taking out the soaked hollow carbon nanofibers, draining, and naturally drying to obtain the palladium modified hollow carbon nanofibers.
2. A breathable sanitary napkin according to claim 1, wherein: the solution of polyvinyl alcohol comprises the following preparation steps: adding 2-5 parts of polyvinyl alcohol crystals into 250-350 parts of deionized water, heating to 85 ℃ in a water bath at constant temperature, stirring until the polyvinyl alcohol crystals are completely dissolved, adding 25-35 parts of 20% nitric acid solution, and stirring to obtain the polyvinyl alcohol solution.
3. A breathable sanitary napkin according to claim 1, wherein: the particle size of the metal palladium is 30-40nm, and the inner diameter of the hollow carbon nanofiber is 50-80nm.
4. A breathable sanitary napkin according to claim 1, wherein: the breathable layer further comprises 3-6 parts of foaming agent, and the foaming agent is nano calcium carbonate.
5. A breathable sanitary napkin according to claim 1, wherein: the particle size of the nano calcium carbonate is 100-120nm.
6. A breathable sanitary napkin according to claim 1, wherein: the base material is a cotton fiber net, and the aperture of the cotton fiber net is 200-300nm.
7. A method of making a breathable sanitary napkin according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1, preparing a surface layer: the surface layer is made of polylactic acid non-woven fabric;
s2, preparing an absorption layer: the absorption layer is composed of high water absorption resin;
s3, preparing a base film: the base membrane is a nano composite membrane, the nano composite membrane comprises a breathable layer and a base layer, the breathable layer is attached to the base layer, and one side of the breathable layer, which is far away from the base layer, is subjected to hot pressing at the temperature of 100-140 ℃, so that the breathable layer and the base layer are bonded with each other, and the nano composite membrane is obtained;
and S4, sequentially stacking and compounding the surface layer, the absorption layer and the bottom film to obtain the breathable sanitary towel.
8. The method of making a breathable sanitary napkin according to claim 7, wherein:
the breathable layer comprises the following preparation steps: melting polyethylene at 85-95 deg.C, adding other materials of the air-permeable layer, performing ultrasonic dispersion to obtain spinning solution, and performing electrostatic spinning to obtain air-permeable layer.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020071944A1 (en) * | 1998-04-21 | 2002-06-13 | Hugh C. Gardner | Breathable composite and method therefor |
| US20160102420A1 (en) * | 2014-10-10 | 2016-04-14 | Korea Institute Of Science And Technology | Carbon nanofibers with sharp tip ends and a carbon nanofibers growth method using a palladium catalyst |
| CN109559905A (en) * | 2018-12-03 | 2019-04-02 | 暨南大学 | A kind of polyvinyl alcohol-carbon nano-fiber flexible composite and the preparation method and application thereof |
| CN113545921A (en) * | 2021-07-30 | 2021-10-26 | 福建恒安集团有限公司 | Three-section type breathable sanitary towel |
-
2022
- 2022-09-26 CN CN202211178353.1A patent/CN115381999A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020071944A1 (en) * | 1998-04-21 | 2002-06-13 | Hugh C. Gardner | Breathable composite and method therefor |
| US20160102420A1 (en) * | 2014-10-10 | 2016-04-14 | Korea Institute Of Science And Technology | Carbon nanofibers with sharp tip ends and a carbon nanofibers growth method using a palladium catalyst |
| CN109559905A (en) * | 2018-12-03 | 2019-04-02 | 暨南大学 | A kind of polyvinyl alcohol-carbon nano-fiber flexible composite and the preparation method and application thereof |
| CN113545921A (en) * | 2021-07-30 | 2021-10-26 | 福建恒安集团有限公司 | Three-section type breathable sanitary towel |
Non-Patent Citations (1)
| Title |
|---|
| 国家技术监督局: "GB/T 5453-1997《纺织品 织物透气性的测定》", vol. 1, 中国地质大学出版社, pages: 1356 - 231 * |
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