CN110882106A - Antibacterial layer and method for producing same, and absorbent article and method for producing same - Google Patents
Antibacterial layer and method for producing same, and absorbent article and method for producing same Download PDFInfo
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- CN110882106A CN110882106A CN201811057716.XA CN201811057716A CN110882106A CN 110882106 A CN110882106 A CN 110882106A CN 201811057716 A CN201811057716 A CN 201811057716A CN 110882106 A CN110882106 A CN 110882106A
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- acetic acid
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Images
Classifications
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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
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention discloses a bacteriostatic layer and a manufacturing method thereof, an absorption article and a manufacturing method thereof, wherein the bacteriostatic layer is used for the absorption article and comprises the following components: a base layer; the bacteriostatic composition is arranged on the base layer and comprises 20-91% of chitosan and 9.9-80% of acetic acid by mass percent, wherein the deacetylation degree of the chitosan is 60-95%, and the molecular weight is 2000-500000; wherein the pH value of the antibacterial layer is less than or equal to 6; the difference of the bacteriostasis rate of the bacteriostasis layer to the escherichia coli 8099 is more than or equal to 36 percent; the bacteriostasis difference rate of the bacteriostasis layer to the pseudomonas aeruginosa is more than or equal to 97 percent. In this way, the antibacterial layer of this application has obvious bacteriostatic action, and pH value is close human skin, can reduce the irritability to skin.
Description
Technical Field
The application relates to the technical field of textiles, in particular to a bacteriostatic layer and a manufacturing method thereof, an absorption article and a manufacturing method thereof.
Background
A conventional disposable diaper and a sanitary napkin are generally formed by laminating a liquid-permeable top sheet in which liquid is absorbed and stored after permeating through the liquid-permeable top sheet, an absorbent layer in which liquid is absorbed and a liquid-impermeable back sheet for preventing further leakage of the liquid absorbed and stored in the absorbent layer.
The inventor of the application finds that microorganisms such as bacteria can be bred due to the fact that the disposable diaper and the sanitary towel are not replaced in time in the long-term research and development process, and the disposable diaper and the sanitary towel are not beneficial to human health. In view of the above, it is desirable to provide a bacteriostatic layer and a method for manufacturing the same, an absorbent article and a method for manufacturing the same to solve the above problems.
Disclosure of Invention
The technical problem that this application mainly solved provides a bacteriostatic layer and manufacturing method, absorption articles for use and manufacturing method thereof, and the bacteriostatic layer of this application has obvious bacteriostatic action, and pH value is close human skin, can reduce the irritability to skin.
In order to solve the technical problem, the application adopts a technical scheme that: providing a bacteriostatic layer for use in an absorbent article, comprising: a base layer; the bacteriostatic composition is arranged on the base layer and comprises 20-91% of chitosan and 9.9-80% of acetic acid by mass percent, wherein the deacetylation degree of the chitosan is 60-95%, and the molecular weight is 2000-500000; wherein the pH value of the antibacterial layer is less than or equal to 6.
In order to solve the above technical problem, another technical solution adopted by the present application is: providing an absorption article, wherein the absorption article comprises a bottom film layer, an absorption layer, the bacteriostatic layer and a surface layer which are arranged in a stacking way; a first adhesive layer is arranged between the antibacterial layer and the surface layer to adhere the antibacterial layer and the surface layer; a second adhesive layer is arranged between the absorption layer and the antibacterial layer to adhere the absorption layer and the antibacterial layer; wherein the pH value of the surface layer is 5-6.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided a method of manufacturing an antibacterial layer for use in preparing an antibacterial layer as described above, the method comprising: providing an acetic acid aqueous solution, wherein the concentration of the acetic acid aqueous solution is 2-4% by mass percent; providing chitosan, mixing the chitosan with an acetic acid aqueous solution to prepare a chitosan-acetic acid aqueous solution, wherein the chitosan-acetic acid aqueous solution comprises the following components in percentage by mass: 1-20% of chitosan; providing a base layer, and adding a chitosan-acetic acid aqueous solution on the base layer; drying to obtain the antibacterial layer with water content less than 5%.
In order to solve the above technical problem, the present application adopts another technical solution that: there is provided a method of manufacturing an absorbent article for use in preparing an absorbent article as hereinbefore described, the method of manufacturing an absorbent article comprising: providing a bottom film layer and an absorption layer; coating a first adhesive layer over the absorbent layer; attaching an antibacterial layer to the absorbent layer; coating a second adhesive layer over the bacteriostatic layer; and attaching the surface layer to the antibacterial layer to obtain the absorbent article.
The beneficial effect of this application is: different from the situation of the prior art, the bacteriostatic layer contains a bacteriostatic composition, and the bacteriostatic composition comprises 20-91% of chitosan and 9.9-80% of acetic acid. Because acetic acid is added, the pH value of the antibacterial layer can be controlled to be less than or equal to 6 and is close to the pH value of human skin, and therefore, the irritation to the human body is small. Further, when the absorbent article is used, the absorbent article can form a nearly closed microenvironment near the pudendum of a user, and acetic acid is released in the microenvironment to simultaneously inhibit the growth of bacteria in the microenvironment, so that the irritation to the skin is further reduced or the anaphylactic reaction is generated. Meanwhile, the chitosan can generate amino groups when dissolved in an acetic acid solution, and the amino groups can combine with negative electrons to inhibit bacteria, so that when secretion permeates into the antibacterial layer, the chitosan in the antibacterial layer can inhibit the bacteria in the secretion, and the bacteria in the secretion are prevented from proliferating. In addition, because the bacteriostatic composition further comprises acetic acid, the acetic acid can assist in dissolving chitosan, so that the chitosan can be easily added to the base layer to form the bacteriostatic layer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic flow chart of an embodiment of an antibacterial layer of the present invention;
FIG. 2 is a schematic flow chart of one embodiment of an absorbent article of the present invention;
FIG. 3 is a schematic flow chart of one embodiment of a method for forming an antimicrobial layer;
FIG. 4 is a schematic flow chart diagram illustrating one embodiment of a method for making an absorbent article according to the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an exploded structure of an embodiment of the present invention is shown.
The application provides a bacteriostatic layer 20, bacteriostatic layer 20 is used for absorbing articles for use 100, and bacteriostatic layer 20 includes: a base layer 22 and a bacteriostatic composition 21. The bacteriostatic composition 21 is disposed on the substrate 22, and the bacteriostatic composition 21 may comprise 20-91% (e.g., 20%, 25%, 45%, 75% or 91%) of chitosan and 9.9-80% (e.g., 9.9%, 40% or 80%) of acetic acid by mass percentage, the chitosan has a deacetylation degree of 60-95% (e.g., 60%, 75% or 95%) and a molecular weight of 2000-500000 (e.g., 2000, 10000, 20000, 100000 or 500000).
Wherein the pH of the bacteriostatic layer 20 is less than or equal to 6 (e.g., 4, 5, 6). The difference of the bacteriostasis rate of the bacteriostasis layer 20 to the escherichia coli 8099 is more than or equal to 36 percent. The bacteriostasis difference rate of the bacteriostasis layer 20 to pseudomonas aeruginosa is more than or equal to 97 percent.
In particular, the base layer 22 has a porous network structure to allow exudates to be rapidly absorbed through the antimicrobial layer 20 and into the absorbent layer of the absorbent article, and optionally, the base layer 22 can be a bonded and carded nonwoven fabric made of polyester, polypropylene, nylon, or other fibers capable of being thermally bonded. Of course, in other embodiments, other polyolefin materials are possible, such as copolymers of polypropylene and polyethylene, linear low density polyethylene, or fine-meshed film fabrics.
Wherein the deacetylation degree of the chitosan is greater than or equal to 70%, and the molecular weight of the chitosan is greater than or equal to 90000. The pH of the antibacterial layer 20 is 5-6.
Wherein the base layer 22 has a basis weight of 10 to 60g/m2A density of 15kg/m or less3. The mass of the bacteriostatic composition 21 is 1-3% of the basis weight of the base layer 22.
Specifically, the base layer 22 has a basis weight of 10 to 60g/m in order to allow secretion to pass through the antibacterial layer 20 rapidly2(e.g., 10 g/m)2、30g/m2、40g/m2Or 60g/m2) Optionally, 15-35g/m2(e.g., 15 g/m)2、20g/m2、25g/m2Or 35g/m2) Optionally, 20-30g/m2(e.g., 20 g/m)2、25g/m2Or 30g/m2)。
Meanwhile, in order to make the antibacterial layer 20 accelerate the diffusion of secretion, the base layer 22 has a fluffy structure relative to the surface layer 10, and optionally, the density of the base layer 22 of the antibacterial layer 20 is less than or equal to 15kg/m3Optionally less than or equal to 12kg/m3。
Different from the prior art, the bacteriostatic layer 20 of the embodiment contains the bacteriostatic composition 21, and the bacteriostatic composition 21 comprises 20-91% of chitosan and 9.9-80% of acetic acid. Because this application has added acetic acid, acetic acid volatilizees, can make the pH value of surface course material be less than or equal to 6, is close the pH value of human skin, consequently is less to the irritability of human body. Further, when the absorbent article is used, the absorbent article can form a nearly closed microenvironment near the pudendum of a user, and acetic acid is released in the microenvironment to simultaneously inhibit the growth of bacteria in the microenvironment, so that the irritation to the skin is further reduced or the anaphylactic reaction is generated. Meanwhile, chitosan can generate amino groups when dissolved in an acetic acid solution, and the amino groups can combine with negative electrons to inhibit bacteria, so that when secretions permeate into the antibacterial layer 20, the chitosan in the antibacterial layer 20 can inhibit the bacteria in the secretions, and the bacteria in the secretions can be prevented from proliferating. In addition, since the bacteriostatic composition 21 of the present embodiment further includes acetic acid, which can assist in dissolving chitosan, the chitosan can be easily added to the base layer 22 to form the bacteriostatic layer 20.
Referring to fig. 2, fig. 2 is an exploded view of an embodiment of an absorbent article of the present application.
Absorbent article100 includes a backsheet layer 40, an absorbent layer 30, the antimicrobial layer 20 of the above embodiments, and a topsheet 10 in a layered arrangement. A first adhesive layer 11 is disposed between the antimicrobial layer 20 and the face layer 10 to bond the antimicrobial layer 20 and the face layer 10. A second adhesive layer 31 is disposed between the absorbent layer 30 and the bacteriostatic layer 20 to bond the absorbent layer 30 and the bacteriostatic layer 20. Wherein the pH value of the surface layer 10 is 5-6. The first adhesive layer 11 and the second adhesive layer 31 are used in amounts of 2.6 to 3.3g/m, respectively2(e.g., 2.6 g/m)2、2.8g/m2、3.1g/m2Or 3.3g/m2) The coating area is 80-100% (e.g., 80%, 85%, 95%, or 100%) of the area of the lay-flat of the bacteriostatic layer 20.
Specifically, the absorbent article 100 may be a diaper or a sanitary napkin, and the sanitary napkin is described in detail below.
The topsheet 10 is in contact with the skin of the user while being liquid permeable to allow the absorbent layer 30 to absorb exudates, including liquids such as menses, and the topsheet 10 may be formed from a liquid permeable woven or nonwoven, natural or synthetic material. The face layer 10 material may comprise a bonded and carded textile made of polyester, polypropylene, nylon, or other fibers capable of thermal bonding. In other embodiments, the material of the cover 10 may be a polyolefin material, such as a copolymer of polypropylene and polyethylene, linear low density polyethylene, a finely perforated film fabric, and a mesh fabric.
Alternatively, the facing layer 10 material is a nonwoven fabric of spunbonded polypropylene, it being understood that the facing layer 10 has a white appearance. In other embodiments, it is also possible to provide the facing layer 10 with a material having good masking properties, and thus to enable the color of the facing layer 10 to mask secretions, such as blue, pink, etc., it is also possible for the facing layer 10 to be colored.
Further, the facing layer 10 may also have a plurality of apertures, optionally through the thickness of the facing layer 10, to further increase the speed of exudate penetration into the absorbent layer 30. The holes are uniformly distributed on the surface of the surface layer 10. The surface of the facing layer 10 may also be treated with, for example, a surfactant, such as a polysiloxane, to further increase the hydrophilicity of the facing layer 10.
The absorbent layer 30 may include a carrier layer and an absorbent material disposed in the carrier layer, the carrier layer is made of stacked absorbent materials, such as airlaid fabric, and optionally the absorbent material may be fluff pulp fibers, but in other embodiments, the absorbent material may be other fibers such as chemical fibers or a mixture of natural fibers and chemical fibers, and is not limited herein.
The absorbent material, which is often referred to as superabsorbent or Super Absorbent Polymer (SAP), may be composed of hydrogel-forming polymers that are insoluble in water, are lightly crosslinked and partially neutralized, and may be prepared from an unsaturated, polymerizable, acid group-containing monomer and a crosslinking agent. The above-mentioned absorbent materials all have very good properties of absorbing body fluids, and therefore, they are capable of absorbing a large amount of fluid relative to their own weight. The partially neutralized and crosslinked copolymers of polyacrylic acid and polyvinyl alcohol are particularly suitable for use as absorbent materials in sanitary napkins. In particular partially neutralized salts of crosslinked copolymers of polyacrylic acid and polyvinyl alcohol.
The surface layer 10 and the absorption layer 30 are arranged in a laminated way, and a liquid-tight bottom film layer 40 can be arranged below the absorption layer 30 and is used for isolating the absorption article 100 from clothes and preventing secretion from polluting the clothes.
Further, in order to improve the comfort of the sanitary napkin during use, such that the backsheet layer 40 is capable of passing air or vapor from the sanitary napkin, but does not pass exudates, such as bodily fluids, the backsheet layer 40 may be made of a micro-embossed polymeric film, such as polyethylene or polypropylene; or from a film having two components, such as a polyethylene film.
The backsheet layer 40 has a side facing the human skin and a side facing the undergarment. A plurality of backsize is also typically provided on the backsheet layer 40 and applied to the undergarment-facing side of the backsheet layer 40.
Different from the situation in the prior art, the bacteriostatic layer 20 of the absorbent article 100 of the present embodiment contains the bacteriostatic composition 21, and the bacteriostatic composition 21 includes acetic acid, which is slowly volatilized and can be adsorbed by the nonwoven fabric of the surface layer 10, so that the pH value of the nonwoven fabric of the surface layer 10 is reduced and is close to the pH value of the skin of a human body, thereby reducing the irritation of the nonwoven fabric of the surface layer 10 to the skin and generating allergic reaction.
In one embodiment, a plurality of absorption articles are usually contained in one big packaging bag at the same time in the prior art, and in order to prevent the absorption articles from volatilizing acetic acid in the storage process, the application adopts a separate packaging bag to store a single absorption article, considering that the acetic acid may volatilize into the atmosphere once the big packaging bag is disassembled. This independent wrapping bag can be the quadrangle, it can be including being located the independent object space of putting and being located four hot blank pressing at the edge of being used for placing absorption articles for use of intermediate position, four hot blank pressing will independently put the object space and seal up to airtight space, effectively prevent to absorb articles for use volatilizing acetic acid in the storage process, so that when absorption articles for use are used, absorption articles for use can form near user's private parts and be close inclosed microenvironment, acetic acid is released in this microenvironment, can restrain the bacterial growth in the microenvironment simultaneously, further reduce the irritability or the production anaphylactic reaction to skin.
In one embodiment, a microporous membrane having adsorption and desorption properties to acetic acid, such as an activated carbon microporous membrane or a nonwoven microporous membrane, may be used as the surface layer. If acetic acid volatilizees in the storage process, this many micropore diaphragm can adsorb acetic acid, and when absorbing articles for use, it can form a near inclosed microenvironment near user's private parts to absorb articles for use, and the temperature of this microenvironment is higher than the room temperature, and humidity is big, and at this moment, the adsorbed acetic acid of many micropore diaphragm can be desorbed in this microenvironment, can restrain the bacterial growth in the microenvironment, reduces the irritability or the production anaphylactic reaction to skin simultaneously.
In one embodiment, in order to reduce the acetic acid volatilized by the antibacterial layer adsorbed on the bottom film layer, a waterproof and breathable material with an acidic pH value can be used as the bottom film layer, such as a polyethylene film, a polypropylene film or a polyethylene film with the surface coated with acetic acid. In other embodiments, a gas permeable membrane may also be employed as the base membrane layer, such as at least one of polyether-b-polyamide, nylon-6, nylon-12, nylon-6, polyethylene oxide, or polybutylene oxide. Only air is allowed to permeate through the gas permeable membrane by utilizing the difference in the dissolution and diffusion coefficients of acetic acid and air in the membrane. When the absorption article is used, the acetic acid can not be absorbed by the bottom film layer and can not permeate through the bottom film layer.
Referring to fig. 1 and 3, fig. 3 is a schematic flow chart of an embodiment of a method for manufacturing an antibacterial layer according to the present invention.
The manufacturing method of the bacteriostatic layer 20 is used for preparing the bacteriostatic layer 20 in the above embodiment, and the manufacturing method of the bacteriostatic layer 20 includes:
step S11: providing an aqueous solution of acetic acid.
Wherein, the concentration of the acetic acid aqueous solution is 2-4% (such as 2%, 3% or 4%) by mass percentage.
Step S12: providing chitosan, and mixing the chitosan and an acetic acid aqueous solution to prepare a chitosan-acetic acid aqueous solution.
Wherein, the chitosan-acetic acid aqueous solution comprises the following components in percentage by mass: chitosan 1-20% (e.g., 10%, 12%, 14%, 16%, 18%, or 20%). The deacetylation degree of the chitosan is greater than or equal to 70%, and the molecular weight of the chitosan is greater than or equal to 90000. The pH of the antibacterial layer 20 is 5-6.
Step S13: a base layer 22 is provided, and a chitosan-acetic acid aqueous solution is added on the base layer 22.
The base layer 22 may be a through-air type non-woven fabric formed of polyester fibers through bonding and carding
Wherein, the step S13 further includes: the chitosan-acetic acid aqueous solution may be coated on the surface of the base layer 22 by a coating roll. Or chitosan-acetic acid aqueous solution can be uniformly sprayed on the surface of the base layer 22. Alternatively, the base layer 22 may be immersed in an aqueous chitosan-acetic acid solution.
Step S14: drying to obtain the antibacterial layer 20.
Wherein, the water content of the bacteriostatic layer 20 is less than 5%.
Wherein, in one embodiment, the drying is at least one of natural air drying or heating drying. The heat drying is at least one of infrared radiation heat drying or heating roller heat drying. The heating temperature for heating and drying is less than or equal to 110 ℃.
Specifically, the drying is performed by heating, and the heating may be performed by infrared radiation heating, heating roller, or the like. Optionally, the heating temperature is less than or equal to 110 ℃, so as to prevent damage to the base layer 22 during heating, such as thermal shrinkage or thermal deformation of fibers of the base layer 22 caused by heating, and prevent excessive dissipation of acetic acid during heating. Optionally, the heating temperature is less than or equal to 90 ℃.
In one embodiment, the air flow rate of the natural air drying is less than or equal to 1 m/s.
It is understood that, in order to prevent excessive dissipation of acetic acid, the air flow rate on the surface of the substrate 22 during heating is less than or equal to 1m/s, and optionally, the air flow rate on the surface of the substrate 22 is less than or equal to 0.1 m/s.
In one embodiment, after drying to obtain the antibacterial layer 20, the method for manufacturing the antibacterial layer 20 further includes: the pH of the antibacterial layer 20 is measured. If the pH value of the antibacterial layer 20 is greater than 6, the chitosan-acetic acid aqueous solution is repeatedly and uniformly sprayed on the surface of the base layer 22, and the antibacterial layer 20 with the pH value less than or equal to 6 is obtained by drying.
Specifically, after step S14, the method for manufacturing the bacteriostatic layer 20 further includes: the step of detecting the pH of the antibacterial layer 20, and after the pH of the antibacterial layer 20 is detected, if the pH of the antibacterial layer 20 is greater than 6, the steps S13 and S14 may be repeated, so that the pH of the antibacterial layer 20 is within a predetermined range, and the acetic acid content in the antibacterial layer 20 is within a suitable range of 5-6.
Referring to fig. 2 and 4, fig. 4 is a schematic flow chart of an embodiment of a method for manufacturing an absorbent article of the present application. The manufacturing method of the absorbent article 100 is used for preparing the absorbent article 100 in the above embodiment, and the manufacturing method of the absorbent article 100 includes:
step S21: a base film layer 40 is provided and,
step S22: an absorbent layer 30 is provided.
Step S23: a first adhesive layer 11 is coated over the absorbent layer 30.
Step S24: the bacteriostatic layer 20 is attached to the absorbent layer 30.
Step S25: a second adhesive layer 31 is coated over the bacteriostatic layer 20.
Step S26: the topsheet 10 is attached to the absorbent layer 30 to provide the absorbent article 100.
Specifically, further, in order to prolong the acetic acid release aging. Make surface course 10 and antibacterial layer 20 form whole simultaneously, be convenient for the easy permeable surface course 10 of secretion and antibacterial layer 20, still be provided with first adhesive layer 11 between antibacterial layer 20 and the surface course 10, first adhesive layer 11 is used for bonding antibacterial layer 20 and surface course 10 for surface course 10 and antibacterial layer 20 form a whole, and the adhesive layer includes the adhesive.
Alternatively, the first adhesive layer 11 and the second adhesive layer 31 may be used in amounts of 2.6 to 3.3g/m, respectively2(e.g., 2.6 g/m)2、2.8g/m2、3.1g/m2Or 3.3g/m2) The coating area is 80-100% (e.g., 80%, 85%, 95%, or 100%) of the area of the lay-flat of the bacteriostatic layer 20.
Optionally, the amount of binder is 2.85-3.15g/m2(e.g., 2.85 g/m)2、2.95g/m2Or 3.15g/m2) When the adhesive is used for preventing the adhesive from being used too much, the absorption of secretion is easily blocked, and the layering phenomenon easily occurring between the antibacterial layer 20 and the surface layer 10 when the adhesive is used too little is prevented, and the acetic acid in the antibacterial layer 20 can volatilize too fast.
Optionally, the first adhesive layer 11 and the second adhesive layer 31 form a film on the surface of the bacteriostatic layer 20, so as to prevent the acetic acid from volatilizing too fast and releasing at a proper rate.
Alternatively, the first adhesive layer 11 is the same as the second adhesive layer 31, meaning that the adhesive in the adhesive layers is the same, and the amount of adhesive is the same, and the area of adhesive is the same.
The adhesive may be polyvinyl alcohol adhesive or thermosetting cationic resin adhesive, and the resin may be polyamide resin.
It will be appreciated that the absorbent article 100 may also include a treatment that is allowed to stand for at least 1 week after it has been formed to allow the facing layer 10 to absorb acetic acid and lower the pH of the facing layer 10, thereby making the facing layer 10 less irritating or allergenic. In addition, the absorbent article 100 may be further processed by disposing a flow guide groove on the surface layer 10, printing a pattern, pressing a pattern, and the like, which will not be described herein again.
The characteristics of the composite nonwoven fabric will be described below with reference to the table.
Example 1:
the antibacterial layer 20 is made in such a way that the base layer 22 is 30g/m2The antibacterial composition 21 used in the hot air non-woven fabric of (1) is: chitosan and acetic acid, the deacetylation degree of the chitosan is 77%, the molecular weight of the chitosan is 9.6 multiplied by 105, and the prepared chitosan-acetic acid aqueous solution has the concentration of 12% (the mixture ratio is 12g of chitosan, 48g of acetic acid and 440g of water). The addition amount of the chitosan-acetic acid composition is 3 percent, namely the basis weight of the bacteriostatic layer 20 is 30.9g/m after the bacteriostatic composition 21 is added2After drying, the pH of the bacteriostatic layer 20 is 5.1.
Example 2:
the antibacterial layer 20 is made in such a way that the base layer 22 is 31g/m2The bacteriostatic composition 21 used in the linear low density polyethylene layer of (a) is: chitosan and acetic acid, the deacetylation degree of the chitosan is 90%, the molecular weight of the chitosan is 20000, and the concentration of the prepared chitosan-acetic acid aqueous solution is 20% (the mixture ratio is 20g of chitosan, 2.2g of acetic acid and 88.8g of water). The addition amount of the chitosan-acetic acid composition is 4 percent, namely the basis weight of the bacteriostatic layer 20 is 32.3g/m after the bacteriostatic composition 21 is added2After drying, the pH of the bacteriostatic layer 20 is 5.1.
Example 3:
the antibacterial layer 20 is made in such a way that the base layer 22 is 30g/m2The used bacteriostatic composition 21 is: chitosan and acetic acid, the deacetylation degree of the chitosan is 82%, the molecular weight of the chitosan is 5000, and the concentration of the prepared chitosan-acetic acid aqueous solution is 12% (the mixture ratio is 12g of chitosan, 4.2g of acetic acid and 83.8g of water). The addition amount of the chitosan-acetic acid composition is 3 percent, namely the basis weight of the bacteriostatic layer 20 is 30.9g/m after the bacteriostatic composition 21 is added2After drying, the bacteriostatic layerThe pH of 20 was 4.9.
Example 4:
the absorbent article 100 is manufactured by using a base film layer 40 made of a polyethylene film, an absorbent layer 30 made of a high molecular water-absorbent resin, a first adhesive layer 11 coated on the absorbent layer 30, the first adhesive layer 11 made of a polyvinyl alcohol adhesive, and the amount of the first adhesive layer 11 being 2.6g/m2The bacteriostatic layer 20 prepared in example 1 was attached to the absorbent layer 30, and a second adhesive layer 31 was coated on the bacteriostatic layer 20, the second adhesive layer 31 being a polyvinyl alcohol-based adhesive, and the amount of the second adhesive layer 31 was 2.6g/m2The surface layer 10 is attached to the bacteriostatic layer 20, and the surface layer 10 is a nonwoven fabric of spunbonded polypropylene to obtain the absorbent article 100.
Example 5:
the absorbent article 100 is manufactured in such a way that the bottom film layer 40 is a polypropylene film, the absorbent layer 30 is fluff pulp fiber, the first adhesive layer 11 is coated on the absorbent layer 30, the first adhesive layer 11 is a polyvinyl alcohol adhesive, and the dosage of the first adhesive layer 11 is 2.9g/m2The bacteriostatic layer 20 prepared in example 1 was attached to the absorbent layer 30, and a second adhesive layer 31 was coated on the bacteriostatic layer 20, the second adhesive layer 31 being a polyvinyl alcohol-based adhesive, and the amount of the second adhesive layer 31 was 3.1g/m2The surface layer 10 is attached to the bacteriostatic layer 20, and the surface layer 10 is a nonwoven fabric of spunbonded polypropylene to obtain the absorbent article 100.
Example 6:
the absorbent article 100 is manufactured in such a way that the bottom film layer 40 is a polyethylene film, the absorbent layer 30 is a crosslinked copolymer of polyacrylic acid and polyvinyl alcohol, the first adhesive layer 11 is coated on the absorbent layer 30, the first adhesive layer 11 is a polyvinyl alcohol adhesive, and the amount of the first adhesive layer 11 is 3.1g/m2The bacteriostatic layer 20 prepared in example 1 was attached to the absorbent layer 30, and a second adhesive layer 31 was coated on the bacteriostatic layer 20, the second adhesive layer 31 being a polyvinyl alcohol-based adhesive, and the amount of the second adhesive layer 31 was 3.1g/m2Attaching a surface layer 10 to the antibacterial layer 20, wherein the surface layer 10 is a non-woven fabric of spun-bonded polypropylene, so as to obtainAn absorbent article 100.
GB 15979-2002: the bacteriostatic performance test method of the non-leachable anti (bacteriostatic) antibacterial product in appendix C5 of hygienic Standard for Disposable sanitary products tests were carried out on the bacteriostatic layer 20 of examples 1-3 and the absorbent article 100 of examples 4-5, and the test results are shown in Table 1 below.
TABLE 1
As can be seen from table 1, under the same conditions, the difference between the bacteriostatic rates of the bacteriostatic layer 20 of examples 1 to 3 and the absorbent article 100 of examples 4 to 5 for escherichia coli 8099 is not less than 36%, and the difference between the bacteriostatic rates for pseudomonas aeruginosa is not less than 97%.
Different from the prior art, the bacteriostatic layer 20 of the application contains the bacteriostatic composition 21, and the bacteriostatic composition 21 comprises 20-91% of chitosan and 9.9-80% of acetic acid. Because chitosan can generate amino groups when dissolved in an acetic acid solution, the amino groups can combine with negative electrons to generate an inhibition effect on bacteria, and therefore, when secretion permeates into the antibacterial layer 20, the chitosan in the antibacterial layer 20 generates an inhibition effect on the bacteria in the secretion, and the proliferation of the bacteria in the secretion is prevented. In addition, since the bacteriostatic composition 21 of the present application further comprises acetic acid, it can assist in dissolving chitosan, so that chitosan can be easily added onto the base layer 22 to form the bacteriostatic layer 20. Meanwhile, because acetic acid is added, the pH value of the antibacterial layer 20 can be controlled to be less than or equal to 6 and is close to the pH value of human skin, and therefore, the irritation to a human body is small. Further, when the absorbent article 100 is used, the absorbent article 100 forms a nearly closed micro-environment near the pudendal region of the user, and the acetic acid is released into the micro-environment to simultaneously inhibit the growth of bacteria in the micro-environment, thereby further reducing the irritation to the skin or causing allergic reactions.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A bacteriostatic layer for use in an absorbent article, comprising:
a base layer;
the bacteriostatic composition is arranged on the base layer and comprises 20-91% of chitosan and 9.9-80% of acetic acid by mass percent, wherein the deacetylation degree of the chitosan is 60-95%, and the molecular weight is 2000-500000;
wherein the pH value of the antibacterial layer is less than or equal to 6.
2. The bacteriostatic layer according to claim 1,
the deacetylation degree of the chitosan is greater than or equal to 70%, and the molecular weight of the chitosan is greater than or equal to 90000;
the pH value of the antibacterial layer is 5-6.
3. The bacteriostatic layer according to claim 1,
the base layer has a basis weight of 10-60g/m2A density of 15kg/m or less3；
The mass of the antibacterial composition is 1-3% of the basis weight of the base layer.
4. An absorbent article, comprising a backsheet layer, an absorbent layer, a bacteriostatic layer according to any one of claims 1-3, and a topsheet layer in a layered arrangement;
a first adhesive layer is arranged between the antibacterial layer and the surface layer so as to adhere the antibacterial layer and the surface layer;
a second adhesive layer is arranged between the absorption layer and the antibacterial layer so as to adhere the absorption layer and the antibacterial layer;
wherein the pH value of the surface layer is 5-6.
The first adhesive layer and the second adhesive layer are used in an amount of 2.6 to 3.3g/m, respectively2The coating area is 80-100% of the spreading area of the antibacterial layer.
5. A method of manufacturing an antibacterial layer for use in preparing the antibacterial layer according to any one of claims 1 to 3, the method comprising:
providing an acetic acid aqueous solution, wherein the concentration of the acetic acid aqueous solution is 2-4% by mass percent;
providing chitosan, and mixing the chitosan and the acetic acid aqueous solution to prepare a chitosan-acetic acid aqueous solution, wherein the chitosan-acetic acid aqueous solution comprises the following components in percentage by mass: 1-20% of chitosan;
providing a base layer, and adding the chitosan-acetic acid aqueous solution on the base layer;
drying to obtain the antibacterial layer, wherein the water content of the antibacterial layer is less than 5%.
6. The method of manufacturing an antibacterial layer according to claim 5, wherein the step of adding the aqueous chitosan-acetic acid solution to the base layer comprises:
coating the chitosan-acetic acid aqueous solution on the surface of the base layer through a coating roller; or
Uniformly spraying the chitosan-acetic acid aqueous solution on the surface of the base layer; or
And soaking the base layer in the chitosan-acetic acid aqueous solution.
7. The method of manufacturing an antibacterial layer according to claim 5, wherein the drying is at least one of natural air drying or heat drying;
the heating and drying is at least one of infrared radiation heating and drying or heating roller heating and drying;
the heating temperature of the heating drying is less than or equal to 110 ℃.
8. The method of producing an antibacterial layer according to claim 5,
the air flow rate of the natural air drying is less than or equal to 1 m/s.
9. The method of manufacturing an antibacterial layer according to claim 5, further comprising, after the drying to obtain the antibacterial layer:
detecting the pH value of the antibacterial layer;
and if the pH value of the antibacterial layer is more than 6, repeatedly and uniformly spraying the chitosan-acetic acid aqueous solution on the surface of the base layer, and drying to obtain the antibacterial layer with the pH value of less than or equal to 6.
10. A method of manufacturing an absorbent article for use in making an absorbent article according to any of claim 4, said method comprising:
providing a bottom film layer, and forming a first protective film layer,
providing an absorption layer;
coating a first adhesive layer over the absorbent layer;
attaching an antimicrobial layer to the absorbent layer;
coating a second adhesive layer over the bacteriostatic layer;
and attaching a surface layer to the absorption layer to obtain the absorption article.
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