CN212949587U - Three-layer mask with anisotropic structure - Google Patents
Three-layer mask with anisotropic structure Download PDFInfo
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- CN212949587U CN212949587U CN202021847976.XU CN202021847976U CN212949587U CN 212949587 U CN212949587 U CN 212949587U CN 202021847976 U CN202021847976 U CN 202021847976U CN 212949587 U CN212949587 U CN 212949587U
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Abstract
The application provides a mask with a three-layer anisotropic structure, which comprises a mask main body and a hanging ear part connected with the mask main body, wherein the mask main body sequentially comprises a hydrophobic inner layer, a nanofiber membrane filter layer and a hydrophilic outer layer which are compounded; the diameter of the nano-fiber in the nano-fiber membrane filtering layer is less than 200 nm. Due to the difference of the hydrophilic and hydrophobic capacities of the inner layer and the outer layer of the mask, moisture generated when people wear the mask can be guided into the outer layer from the inner layer, so that the comfort of the mask is improved, and stuffiness is avoided; moreover, the protective filter layer of the mask is a nano-film formed by nano-fibers, wherein the diameter of the nano-fibers is less than 200nm, the porosity is high, and the protective performance can be improved without influencing the comfort. This application the gauze mask has certain protectiveness, and it wears the travelling comfort and has obtained improving by a wide margin, can wear for a long time comfortably.
Description
Technical Field
The application relates to the technical field of masks, in particular to a mask with a three-layer opposite-nature structure.
Background
The mask is usually worn on the mouth and nose of a user and is a tool for filtering air to block harmful gas, spray and other entrance and exit and nose parts, and the performance mainly considered when the mask is used comprises filtering performance, fitting performance, comfort and the like. The earliest masks were mainly made of textile fabrics such as gauze or paper, for example, some fashionable personalized masks usually adopt polyester fabrics. The masks on the market are generally classified into rectangular masks or cup-shaped masks according to the shape.
Because the mask has a certain filtering function on air entering the lung, when respiratory infectious diseases prevail or work in an environment polluted by dust and the like, the mask has a very good protective effect on virus, dust and the like when being worn. The protective material in the existing mask mainly adopts melt-blown non-woven fabric, polytetrafluoroethylene film and the like; the inner layer and the outer layer of the mask are both made of hydrophobic polypropylene non-woven fabrics.
However, moisture can not be completely discharged in the wearing process of the existing mask, the feeling of sultriness and discomfort can be caused, and the water unidirectional transfer index is a negative value. The wearing comfort of the mask is poor, and the subjective performance of common people wearing the mask for preventing and controlling epidemic situations is easily influenced. In addition, even after the epidemic situation has passed, people go to public places or increase the opportunity to wear the mask in influenza seasons, so the problem of poor mask wearing comfort needs to be solved.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned exists, this application provides a gauze mask of three-layer opposite sex structure, and the gauze mask that this application provided has certain protectiveness to can see through moisture, it is good to wear the travelling comfort.
The application provides a mask with a three-layer anisotropic structure, which comprises a mask main body and a hanging ear part connected with the mask main body, wherein the mask main body sequentially comprises a hydrophobic inner layer, a hydrophilic nanofiber membrane filtering layer and a hydrophilic outer layer which are compounded; the diameter of the nano-fiber in the hydrophilic nano-fiber membrane filtering layer is less than 200 nm.
Preferably, the hydrophobic inner layer is made of hydrophobic fibers and has a grammage of less than 50g/m2The fabric of (1).
Preferably, the hydrophobic fiber is selected from one or more of polylactic acid fiber, polyamide fiber, polyester fiber, polyurethane fiber, polyethylene fiber, polyacrylonitrile fiber, polypropylene fiber, and acetate fiber.
Preferably, the hydrophilic outer layer is made of hydrophilic fibers having a grammage of less than 150g/m2The fabric of (1).
Preferably, the hydrophilic fibers are selected from one or more of polyvinyl formal fibers, cotton fibers, hemp fibers, regenerated cellulose fibers, wool fibers, silk fibers, and regenerated protein fibers.
Preferably, the hydrophilic nanofiber membrane filter layer is a membrane consisting of hydrophilic nanofibers, and the hydrophilic nanofibers are selected from one or more of nanocellulose fibers, nano protein fibers, modified polyvinyl alcohol fibers, nano chitin fibers, nano alginate fibers, nano polyethylene glycol fibers and nano gelatin fibers.
Preferably, the hydrophobic inner layer, the hydrophilic nanofiber membrane filtering layer and the hydrophilic outer layer are compounded together through an adhesive glue, wherein the adhesive glue is selected from one or more of aqueous polyurethane glue, aqueous polyacrylate glue and epoxy resin glue.
The application provides a method for preparing a mask as described above, comprising the steps of:
forming a hydrophilic nanofiber membrane filter layer on the hydrophobic inner layer through electrostatic spinning, and then compounding the hydrophilic nanofiber membrane filter layer with the hydrophilic outer layer to obtain a mask main body; the mask main body is connected with the ear hanging part to obtain the mask.
Preferably, the electrospinning spinning solution comprises a hydrophilic polymer, a cross-linking agent and a catalyst; the voltage of the electrostatic spinning is 70-90 kv.
Preferably, the compounding with the hydrophilic outer layer is realized by hot-pressing adhesive, and the hot-pressing temperature is 110-130 ℃ and the time is 3-8 seconds.
Compared with the prior art, the mask provided by the application has three layers of anisotropic structures, namely, the mask main body sequentially comprises a hydrophobic inner layer, a hydrophilic nanofiber membrane filtering layer and a hydrophilic outer layer which are compounded; the diameter of the nano-fiber in the hydrophilic nano-fiber membrane filtering layer is less than 200 nm. Due to the difference of the hydrophilic and hydrophobic capacities of the inner layer and the outer layer of the mask, moisture generated when people wear the mask can be guided into the outer layer from the inner layer, so that the comfort of the mask is improved, and stuffiness is avoided; moreover, the protective filter layer of the mask is a nano-film formed by hydrophilic nano-fibers, wherein the diameter of the nano-fibers is less than 200nm, the porosity is high, the hydrophilicity is good, and the protective property and the comfort are improved. Therefore, this application gauze mask has certain protectiveness, and it is worn the travelling comfort and has obtained improving by a wide margin, can wear for a long time comfortably.
Drawings
Fig. 1 is a schematic view of a main structure of a mask according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
The application provides a mask with a three-layer anisotropic structure, which comprises a mask main body and a hanging ear part connected with the mask main body, wherein the mask main body sequentially comprises a hydrophobic inner layer, a hydrophilic nanofiber membrane filtering layer and a hydrophilic outer layer which are compounded; the diameter of the nano-fiber in the hydrophilic nano-fiber membrane filtering layer is less than 200 nm.
The application provides a travelling comfort gauze mask with protectiveness, it has certain protectiveness to can see through the moisture, can not have stifle hotness, it is good to wear the travelling comfort.
Referring to fig. 1, fig. 1 is a schematic view of a main structure of a mask provided in an embodiment of the present application. Wherein, 1 is a hydrophobic inner layer, 2 is a hydrophilic nanofiber membrane filter layer, and 3 is a hydrophilic outer layer. In the mask provided by the embodiment of the application, the mask main body is of a three-layer anisotropic structure and comprises a hydrophobic inner layer 1, a hydrophilic nanofiber membrane filter layer 2 and a hydrophilic outer layer 3; the core filter layer is made of hydrophilic nanofiber materials, water drops can quickly penetrate into the outer layer after dropping on the inner layer, the water unidirectional transfer index is larger than 300, moisture can be timely discharged to the outside, and the water-vapor permeable and breathable fabric is breathable and comfortable to wear.
In the embodiment of this application, three-layer opposite sex's gauze mask includes hydrophobic inlayer 1, and it is the slice that presses close to user's mouth, nose position when using, and inside has certain gap, mainly plays the effect of supporting the filter layer. Preferably, the hydrophobic inner layer is made of hydrophobic fibers and has a grammage of less than 50g/m2The fabric of (a); which is typically a woven fabric having a weave structure such as plain and/or twill. The gram weight of the hydrophobic inner layer is preferably 20-45g/m2More preferably 25 to 40g/m2. And, the hydrophobic fiber preferably includes one or more of polylactic acid fiber, polyamide fiber, polyester fiber, polyurethane fiber, polyethylene fiber, polyacrylonitrile fiber, polypropylene fiber and acetate fiber, more preferably at least one of polylactic acid fiber, polyamide fiber, polyester fiber and polyurethane fiber.
The hydrophilic nanofiber membrane described in the embodiment of the present application is a protective filter layer of a mask body, such as the hydrophilic nanofiber membrane filter layer 2 shown in fig. 1. In an embodiment of the present application, the hydrophilic nanofiber membrane filtering layer is a membrane composed of hydrophilic nanofibers, which can be made by an electrospinning technique. The diameter of the nano fiber in the hydrophilic nano fiber membrane filter layer is less than 200nm, the porosity is high (generally more than 90 percent), the hydrophilicity is good, the comfort of the mask can be improved, and the protection performance can be improved.
In the specific embodiment of the present application, the preparation process of the nanofiber membrane is as follows: dissolving hydrophilic polymer in water, adding cross-linking agent and catalyst to prepare uniform electrostatic spinning liquid, preferably spray spinning at 70-90 kv, receiving and curing on a receiving device to form a nano-film. In the spinning solution for electrostatic spinning, the hydrophilic polymer includes, but is not limited to, cellulose and protein, and modified polyvinyl alcohol, polyethylene glycol, and the like can be used. The embodiment of the application adopts the needleless spinning spiral electrode, and the spun nanofiber membrane is a planar membrane and can be cut at will; the nano-fiber can be one or more of nano-cellulose fiber, nano-protein fiber, modified polyvinyl alcohol fiber, nano-chitin fiber, nano-alginate fiber, nano-polyethylene glycol fiber and nano-gelatin fiber, and is preferably one of modified polyvinyl alcohol fiber, nano-polyethylene glycol fiber and nano-gelatin fiber.
As shown in fig. 1, the mask having a three-layer opposite structure according to the embodiment of the present invention includes a hydrophilic outer layer 3, which is a thin layer member away from the face of the wearer. Preferably, the hydrophilic outer layer is made of hydrophilic fibers and has a grammage of less than 150g/m2The fabric of (a); which is typically a woven fabric having a weave structure such as plain and/or twill. The grammage of the hydrophilic outer layer is preferably 40-150g/m2More preferably 45 to 145g/m2. And, the hydrophilic fiber preferably includes one or more of polyvinyl formal fiber, cotton fiber, hemp fiber, regenerated cellulose fiber, wool fiber, silk fiber and regenerated protein fiber, for examplePolyvinyl formal fiber, cotton fiber, hemp fiber, regenerated cellulose fiber, and silk fiber.
In the embodiment of the application, the hydrophobic inner layer, the hydrophilic nanofiber membrane filtering layer and the hydrophilic outer layer can be compounded together through adhesive glue; the adhesive glue is preferably selected from one or more of waterborne polyurethane glue, waterborne polyacrylate glue and epoxy resin glue.
The embodiment of the application also provides a preparation method of the mask, which comprises the following steps:
forming a hydrophilic nanofiber membrane filter layer on the hydrophobic inner layer through electrostatic spinning, and then compounding the hydrophilic nanofiber membrane filter layer with the hydrophilic outer layer to obtain a mask main body; the mask main body is connected with the ear hanging part to obtain the mask.
Wherein the electrostatic spinning process and the like are as described above; the hydrophobic inner layer may be a substrate to receive the hydrophilic nanofiber membrane. Then, the mask body is preferably formed by hot-pressing adhesive, finally covering the hydrophilic fabric, and bonding to obtain the mask material with the sandwich type three-layer opposite structure, namely the mask body. The adhesive glue is preferably selected from one or more of waterborne polyurethane glue, waterborne polyacrylate glue and epoxy resin glue, and hot melt glue particles can be adopted; the temperature of the hot pressing is preferably 110 ℃ to 130 ℃, more preferably 120 ℃, and the time can be 3 to 8 seconds. In addition, the operation of connecting the mask body with the ear hanging part is not particularly limited in the application, and the conventional method in the field can be adopted.
In the mask obtained in the embodiment of the application, the inner layer is made of hydrophobic materials, the outer layer is made of hydrophilic materials, and the nanofiber membrane is made of hydrophilic materials; due to the difference between the hydrophilicity and hydrophobicity of the inner layer material and the outer layer material, water drops can quickly penetrate into the outer layer after dropping into the inner layer, and the moisture absorption quick drying evaluation part 2 of the textile according to GB/T21655.2-2019: the dynamic water transfer method is standard, the unidirectional transfer index of test water is more than 300, moisture can be rapidly discharged to the outside in time, and the fabric is moisture permeable and breathable, does not have stuffy feeling and is comfortable to wear.
For further understanding of the present application, the mask with three layers of anisotropic structure provided in the present application will be specifically described below with reference to examples. It should be understood, however, that these examples are for illustrative purposes only and are not intended to limit the scope of the present application, which is defined by the following examples.
The bacterial filtration efficiency test method comprises the following steps: three samples were randomly sampled for testing according to the bacterial filtration efficiency test method in the YY0469-2011 medical surgical mask standard.
The ventilation resistance test method comprises the following steps: the test was carried out according to the method for measuring the ventilation resistance in the standard YY0969-2013 "Disposable medical mask".
Example 1
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polyurethane fiber and has a gram weight of 38g/m2The fabric of (a); the hydrophilic outer layer is composed of cotton fibers and has a gram weight of 122g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. And (3) taking the polyurethane fiber fabric as a base material to receive the modified polyvinyl alcohol nanofiber, and then carrying out hot pressing for 5S at 120 ℃ to melt the bonding glue so as to bond the cotton fiber fabric and the polyurethane fiber fabric together. The bacterial filtration efficiency of the composite fabric is 98.9 percent, and the ventilation resistance is 38Pa/cm2. The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can see through the skin rapidly, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 528, can in time discharge the outside with the moisture rapidly, and it is ventilative to pass through the moisture, can not have stifled sense of sensation, wears comfortablely.
Example 2:
a mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polylactic acid fiber with a gram weight of 38g/m2The fabric of (a); the hydrophilic outer layer is made of cotton fiber and has a gram weight of 86g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The polylactic acid fiber fabric is used as a base material to receive the modified polyvinyl alcohol nanofiber, and then the cotton fiber fabric and the polylactic acid fiber fabric are bonded together by hot pressing at 120 ℃ and 5S to melt the bonding glue. The bacterial filtration efficiency of the composite fabric is 97.7 percent, and the ventilation resistance is 35Pa/cm2. The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can pass through the skin fast, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 742, can in time discharge the outside with the moisture, and it is ventilative to pass through wet, can not have stifled hotness, wears comfortablely.
Example 3:
a mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polyester fibers and has a gram weight of 26g/m2The fabric of (a); the hydrophilic outer layer is made of cotton fiber and has a grammage of 114g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The polyester fiber fabric is used as a base material to receive the nano polyethylene glycol nano fibers, and then the cotton fibers are melted by hot pressing at 120 ℃ for 5S to melt the adhesiveThe fiber fabric and the polyester fiber fabric are bonded together. The bacterial filtration efficiency of the composite fabric is 96.5 percent, and the ventilation resistance is 45Pa/cm2。
The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can pass through the skin fast, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 745, can in time discharge the outside with the moisture, and it is ventilative to pass through wet, can not have stifled hotness, wears comfortablely.
Example 4:
a mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polyester fiber with a gram weight of 28g/m2The fabric of (a); the hydrophilic outer layer is composed of regenerated hemp fiber with the gram weight of 150g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The polyester fiber fabric is used as a base material to receive the nano polyethylene glycol nano fibers, and then the regenerated hemp fiber fabric and the polyester fiber fabric are bonded together by hot pressing at 120 ℃ and 5S to melt the bonding glue. The bacterial filtration efficiency of the composite fabric is 95.2 percent, and the ventilation resistance is 31Pa/cm2。
The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can see through the skin rapidly, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 878, can in time discharge the outside with the moisture, and it is ventilative to pass through the moisture, can not have stifled sense of sensation, wears comfortablely.
Example 5
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is made of water-repellent polyimideThe gram weight of the amine fiber composition is 28g/m2The fabric of (a); the hydrophilic outer layer is composed of viscose fiber and has a gram weight of 126g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The water repellent polyamide fiber fabric is used as a base material to receive the nano gelatin fiber, and then the viscose fiber fabric and the polyamide fiber fabric are bonded together by hot pressing at 120 ℃ and 5S to melt the adhesive. The bacterial efficiency of the composite fabric is 96.1 percent, and the ventilation resistance is 41Pa/cm2. The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can pass through the skin rapidly, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 461, can in time discharge the outside with moisture, and it is ventilative to pass through wet, can not have stifled hotness, wears comfortablely.
Example 6
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is made of polyethylene fiber and has a gram weight of 28g/m2The fabric of (a); the hydrophilic outer layer is composed of lyocell fibers and has a grammage of 107g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The polyethylene fiber fabric is used as a base material to receive the nano gelatin fiber, and then the lyocell fiber fabric and the polyethylene fiber fabric are bonded together by hot pressing at 120 ℃ and 5S to melt the adhesive. The bacterial filtration efficiency of the composite fabric is 97.8 percent, and the ventilation resistance is 38Pa/cm2. In this applicationThe layer is hydrophobic material, and the outer layer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because the difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can permeate the skin fast, according to GB/T21655.2 standard, tests the one-way transmission index of water and is 768, can in time discharge the moisture to the outside, and it is ventilative to pass through wet, does not have stifle hotness sensation, wears comfortablely.
Example 7
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polyamide fiber with gram weight of 38g/m2The fabric of (a); the hydrophilic outer layer is composed of lyocell fibers and has a grammage of 107g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The modified polyvinyl alcohol nanofiber is received by taking the polyamide fiber fabric as a base material, and then the polyvinyl formal fiber fabric and the polyamide fiber fabric are bonded together by hot pressing at 120 ℃ for 5S to melt the adhesive. The bacterial filtration efficiency of the composite fabric is 97.0 percent, and the ventilation resistance is 46Pa/cm2The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because the difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can pass through the skin fast, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 742, can in time discharge the outside with the moisture, and it is ventilative to pass through wet, can not have stifled sense of sensation, wears comfortablely.
Example 8
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polyamide fiber with gram weight of 38g/m2The fabric of (a); the hydrophilic outer layer is made of polyvinyl formal fiber with the gram weight of 69g/m2The fabric of (1).
The preparation of the nanofiber membrane isDissolving a high polymer material in water, adding a cross-linking agent and a catalyst to prepare uniform electrostatic spinning liquid, carrying out jet spinning at a high pressure of 70-90 kv, and finally solidifying the nano-fibers on the hydrophobic fabric covered on the receiving plate to form the nano-fiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The modified polyvinyl alcohol nanofiber is received by taking the polyamide fiber fabric as a base material, and then the polyvinyl formal fiber fabric and the polyamide fiber fabric are bonded together by hot pressing at 120 ℃ for 5S to melt the adhesive. The bacterial filtration efficiency of the composite fabric is 98.5 percent, and the ventilation resistance is 43pa/cm2。
The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can pass through the skin fast, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 359, can in time discharge the outside with the moisture, and it is ventilative to pass through wet, can not have stifled hot sense, wears comfortablely.
Example 9
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of polyamide fiber with gram weight of 38g/m2The fabric of (1). The hydrophilic outer layer is made of silk fiber and has a gram weight of 42g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The modified polyvinyl alcohol nanofiber is received by taking the polyamide fiber fabric as a base material, and then the silk fiber fabric and the polyamide fiber fabric are bonded together by hot pressing at 120 ℃ for 5S to melt the bonding glue. The bacterial filtration efficiency of the composite fabric is 96.2 percent, the ventilation resistance is 44Pa/cm2,
the inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between interior, outer material are hydrophilic hydrophobic, the water droplet drips behind the inlayer, can see through the skin rapidly, according to GB/T21655.2 standard, and the one-way transmission index of test water is 397, can in time discharge the outside with the moisture, and it is ventilative to pass through wet, can not have stifled hotness, wears comfortablely.
Example 10
A mask with three layers of different structures comprises: a hydrophobic inner layer, a nanofiber membrane and a hydrophilic outer layer. The hydrophobic inner layer is composed of hydrophobic polyamide fiber with gram weight of 38g/m2The fabric of (a); the hydrophilic outer layer is composed of wool fibers and has a grammage of 145g/m2The fabric of (1).
The preparation of the nanofiber membrane is that polymer materials are dissolved in water, then crosslinking agents and catalysts are added to prepare uniform electrostatic spinning liquid, jet spinning is carried out at the high pressure of 70kv-90kv, and finally, nanofibers are solidified on hydrophobic fabrics covered on a receiving plate to form the nanofiber membrane. The diameter of the nano-fiber is less than 200nm, and the porosity is more than 90%. The modified polyvinyl alcohol nanofiber is received by taking the polyamide fiber fabric as a base material, and then the wool fiber fabric and the polyamide fiber fabric are bonded together by hot pressing at 120 ℃ and 5S to melt the bonding glue. The bacterial filtration efficiency of the composite fabric is 95.7 percent, and the ventilation resistance is 45Pa/cm2。
The inlayer is hydrophobic material in this application, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, because difference between the hydrophilic and hydrophobic of inside and outside layer material, the water droplet drips behind the inlayer, can see through the skin rapidly, according to GB/T21655.2 standard, and the unidirectional transfer index of test water is 412, can in time discharge the outside with the moisture, and it is ventilative to pass through wet, can not have stifled hotness, wears comfortablely.
Comparative example 1:
a disposable medical mask is composed of three layers, the outer layer is spun-bonded non-woven fabric, the middle layer is melt-blown non-woven fabric, and the inner layer is spun-bonded non-woven fabric. The bacterial filtration efficiency is 95 percent, and the pressure difference is 47Pa/cm2And meets the requirements of corresponding indexes in the standard of YY0969-2013 disposable medical mask. The water was tested to have a unidirectional water transfer index of-1293 according to GB/T21655.2 standard.
In summary, the bacteria filtering efficiency of the mask is more than or equal to 95%, and the protection performance of the mask is consistent with the indexes of a disposable medical mask. Because this application inlayer is hydrophobic material, and the inlayer is hydrophilic material, and the nanofiber membrane is hydrophilic material, has the difference of hydrophilicity and hydrophobicity between the inside and outside layer material, and the moisture of people's exhalation can discharge the outside rapidly when wearing the gauze mask, and it is ventilative to pass through the moisture, can not have stifled hotness, and the medical gauze mask of disposable does not have one-way moisture-conducting performance, can stifled when wearing for a long time, causes facial skin injury easily.
The foregoing is only a preferred embodiment of the present application, and it should be noted that various modifications of the embodiments can be implemented by those skilled in the art without departing from the technical principle of the present application, and these modifications should be considered as the scope of the present application.
Claims (7)
1. A three-layer mask with a foreign structure comprises a mask main body and a hanger part connected with the mask main body, and is characterized in that the mask main body sequentially comprises a hydrophobic inner layer, a hydrophilic nanofiber membrane filter layer and a hydrophilic outer layer which are compounded; the diameter of the nano-fiber in the hydrophilic nano-fiber membrane filtering layer is less than 200 nm.
2. The mask of claim 1 wherein said hydrophobic inner layer is made of hydrophobic fibers having a grammage of less than 50g/m2The fabric of (1).
3. The mask of claim 2 wherein said hydrophobic fibers are selected from the group consisting of polylactic acid fibers, polyamide fibers, polyester fibers, polyurethane fibers, polyethylene fibers, polyacrylonitrile fibers, polypropylene fibers and acetate fibers.
4. The mask of claim 1 wherein said hydrophilic outer layer is made of hydrophilic fibers having a grammage of less than 150g/m2The fabric of (1).
5. The mask of claim 4 wherein said hydrophilic fibers are selected from the group consisting of polyvinyl formal fibers, cotton fibers, hemp fibers, regenerated cellulose fibers, wool fibers, silk fibers and regenerated protein fibers.
6. The mask of claim 1 wherein said hydrophilic nanofiber membrane filter is a membrane comprised of hydrophilic nanofibers selected from one of nanocellulose fibers, nano protein fibers, modified polyvinyl alcohol fibers, nanocellulose fibers, nano alginate fibers, nano polyethylene glycol fibers and nano gelatin fibers.
7. The mask of any of claims 1 to 6 wherein said hydrophobic inner layer, hydrophilic nanofiber membrane filtration layer and hydrophilic outer layer are compounded together by an adhesive glue selected from one of aqueous polyurethane glue, aqueous polyacrylate glue and epoxy glue.
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| CN202021847976.XU CN212949587U (en) | 2020-08-28 | 2020-08-28 | Three-layer mask with anisotropic structure |
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| CN212949587U true CN212949587U (en) | 2021-04-13 |
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