WO2021212542A1

WO2021212542A1 - Long-acting reusable n90-level face mask and preparation method therefor

Info

Publication number: WO2021212542A1
Application number: PCT/CN2020/088269
Authority: WO
Inventors: 吴宁西; 刘惠林
Original assignee: Wu Ningxi
Priority date: 2020-04-23
Filing date: 2020-04-30
Publication date: 2021-10-28
Also published as: CN111424360A

Abstract

Disclosed are a long-acting reusable N90-level face mask and a preparation method therefor. The N90-level face mask comprises a face mask body (1), the face mask body (1) is composed of an inner layer (2) and an outer layer (3); the inner layer (2) is made of ultra-fine denier anhydrous drawn PP false-twist textured yarn that is 75D or above or below; and the outer layer (3) is a single-layer structure made from warp-weft interlacing and laminating, by means of a loom shuttle, single 6 or double 6 high-strength air textured yarn of nylon that is 160D or above or below, or polyester that is 75D or above or below and polypropylene false-twist textured yarn. The N90-level face mask can thoroughly solve the problem of the filtering efficiency of a disposable protective face mask/medical surgical face mask decreasing and same directly losing efficacy after being worn for four hours; and the face mask has a physical structure, a constant density, a long-acting and stable filtering effect, can be washed with water and is machine washable, can be sterilized by directly spraying alcohol thereon, can immediately reduce the consumption expenditure for disease prevention during a pandemic, saves on social costs, increases economic benefits, and reduces the burden of expenditure on enterprises and individuals.

Description

Long-acting reusable N90-level mask and preparation method thereof

Technical field

The invention relates to the field of masks, in particular to a long-lasting reusable N90-level mask and a preparation method thereof.

Background technique

At present, all masks on the market are disposable and disposable, and at the same time, they rely heavily on the raw materials of meltblown cloth. If it is medical grade, a sterile workshop is also required. The overall investment is large and the output cost-effectiveness ratio is low. The same is true for industrial masks. In the event of large-scale epidemic spread, it is difficult to adjust, and it is easy to produce more sanitation pressure and environmental pollution. Traditional disposable masks may become a new source of transmission after they are disposable.

technical problem

The purpose of the present invention is to provide a long-lasting and reusable N90-level mask and a preparation method thereof in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background art.

Technical solutions

In order to achieve the above objective, the present invention provides the following technical solution: a long-lasting reusable N90 mask and a preparation method thereof, including a mask body, the mask body is composed of an inner layer and an outer layer, the inner layer adopts Ultra-fine anhydrous drawing PP false-twisted textured yarn 75D or less, the outer layer is made of nylon 160D or less, single 6 or double 6 high-strength air textured yarn, or polyester 75D or less and polypropylene false twisted texture The wire picking warp and weft are interlaced to achieve a single layer organization.

A method for preparing long-lasting and reusable N90 masks, the specific steps are as follows:

Step 1: The inner layer is made of ultra-fine anhydrous drawn PP false-twist textured yarn of 75D or less;

Step 2: The outer layer is made of nylon 160D or less single 6 or double 6 high-strength air texturing yarn, or polyester 75D or less and polypropylene false twist texturing yarn picking warp and weft interlaced to achieve a single layer structure;

Step 3: Then in the form of picking, the two layers of special yarns, warp and weft, are interlaced to form a single-layer double-density screen structure.

Beneficial effect

The beneficial effects of the present invention are: the present invention can completely solve the problem that the filtration efficiency of the disposable protective mask/medical surgical mask decreases directly after wearing for 4 hours, the physical structure, the density is constant, the filtration effect is long-lasting and stable, and it can be washed with water, Direct spraying with alcohol can immediately reduce the expenditure on epidemic prevention consumption during a large-scale epidemic, save social costs, improve economic efficiency, and reduce the burden on enterprises and individuals. Single-guide masks made of single-guide fabrics can be used for one The annual use cost is still 60%-80% less than the existing disposable sterilized surgical mask and industrial-grade N90-95 mask, respectively, and the social and economic benefits are extremely obvious;

The invention can immediately reduce the secondary hidden contact infection of sanitation workers and environmental protection pressure. The best environmental sanitation and environmental protection is reusability, reducing the disposable products that are thrown away;

The invention can immediately reduce the requirements for the sterilization of the finished product production environment, and has the characteristics of low requirements for the large-scale mass production environment. Because the finished product can be sprayed and killed at will with alcohol, it is completely unnecessary for the company to sterilize the environment. The investment in equipment and environment during the construction of the workshop is immediately visible in reducing burdens and increasing efficiency;

The finished product of the invention requires low production environment, the output can meet the requirements of large-scale mass production at any time, and the filtration efficiency level is long-lasting and stable. Therefore, it has the characteristics of the national strategic anti-epidemic material reserve. Traditional disposable masks and industrial masks use electrostatic electrets. , There is a situation that the electrostatic discharge adsorption reduces the failure. The single-lead isolation mask completely avoids the above situation and can be used as a strategic material reserve for a long time.

Description of the drawings

Figure 1 is a schematic diagram of the single-guide single-layer double-density screen type structure of the present invention;

2 is a schematic diagram of the single-conducting double-layer four-density structure of the present invention;

Figure 3 is a schematic diagram of the single-lead three-layer six-density structure of the present invention.

In the picture: 1. Mask body, 2. Inner layer, 3. Outer layer.

Embodiments of the present invention

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be more clearly defined.

Example: Please refer to Figures 1-3. The present invention provides a technical solution: a long-lasting and reusable N90-level mask, including a mask body 1, which is composed of an inner layer 2 and an outer layer 3. Layer 2 is made of ultra-fine denier anhydrous drawing PP false twisted textured yarns of 75D or less, and outer layer 3 is of nylon 160D or less, single 6 or double 6 high-strength air textured yarns, or polyester 75D or less and polypropylene false yarns. Twisted textured yarn picking warp and weft staggered stacking to achieve a single layer structure.

Working principle: A long-lasting and reusable N90 mask and its preparation method. The mask body 1 is composed of an inner layer 2 and an outer layer 3. The present invention uses a special single-conducting material, that is, a unidirectional moisture-conducting material. In the form of picking, the warp and weft layers of two special yarns are interlaced to form a single-layer double-density screen structure. The inner layer of the structure is made of PP false twisted textured yarn (super fine denier anhydrous drawing Polypropylene) 75D or less, the outer layer can be nylon 160D or less, single 6 or double 6 high-strength air texturing yarn, or polyester 75D or less and polypropylene false twist texturing yarn picking warp and weft staggered stacking Achieve a single-tier organization.

The selection of yarn materials implemented by this technology, polypropylene and polyester yarns are mainly false-twisted textured yarns. On the one hand, false-twisted textured yarns improve the tightness of the filaments, and at the same time obtain the bulkiness and good elasticity of the textured yarns; The increase in the degree of filtration has played an important role in improving the overall filtering effect of the mask. Secondly, in the yarn of the present invention, the number of fiber holes is mostly ultra-fine fiber, such as 50D72F, 75D72F, 75D144F, taking 75D144F yarn specifications as an example, the number of fibers in a yarn reaches 144 monofilaments, the same The thickness of the yarn material and the greater the number of fibers also increase the surface area of the fiber filtration. Under the premise of not affecting the respiratory resistance, the overall protective effect of the mask is improved. The fabric is lighter in weight by using several thicknesses; third, the technology of the present invention also applies air textured yarns to the outer layer of masks, and uses FDY filaments to produce ATY air textured yarns using special equipment. , The air texturized yarn uses compressed air to make the fiber into a fluffy effect similar to short fiber, does not affect the overall fabric strength, and also increases the specific surface area. This kind of yarn matching structure, innovatively applied to masks, does not affect the breathing resistance, does not increase the weight, and obtains a better actual effect of filtering protection.

The woven single conductive fabric formed by the present invention has the characteristics of single layer and double density. The outer layer can be adjusted in density and function at will, and even the silica array can be directly distributed on the outer layer to achieve super-oleophobic and super-hydrophobic functions. Strengthen the performance of dust and oil and gas isolation. The inner layer of PP polypropylene fiber has a structural density of secondary dust, viruses, bacteria and other ultra-fine particles to isolate and block the natural electrostatic adsorption partly due to the density of polypropylene fiber;

The inner layer of the single-layer double-density single-guide fabric formed by the present invention is composed of polypropylene false-twisted textured yarns as the inner layer of the shuttle-weaving laminated double-density, because the characteristics of polypropylene are high strength, light relative density, and the moisture absorption of polypropylene is very high. Small, almost non-hygroscopic, the moisture regain rate is close to zero under normal atmospheric conditions, so the polypropylene layer can not only be used as an ultra-fine and hard secondary hard filter layer, but also as a sterile layer for secondary adsorption and hard isolation of bacteria and viruses. In the case of single layer and double density, the inner layer of ultra-fine denier polypropylene is used for drawing, and the outer layer of nylon or polyester or even any natural fiber is used to form a single layer of double density. The outer layer density is responsible for the hard barrier of 10-0.075 micron particles, and the inner density is responsible for The secondary hard barrier is also used as a sterile layer of physical properties. It uses the characteristics of natural electrostatic effect to achieve partial resorption. The yarn is not easy to breed bacteria. It is tested by the national standard test for antibacterial effect, GB/T20944.3-2008 oscillation method, The inhibitory rate of Staphylococcus aureus can reach more than 95%, and that of Escherichia coli and Candida albicans can reach more than 70%. If double-layer or three-layer single-conductor fabrics are used, the overall antibacterial rate can be greatly improved. It can also be combined with dyeing and finishing process, anti-viral finishing is adopted for post-finishing, and anti-viral finishing agent 100G/L is applied to the fabric. Through the active ingredients of the finishing agent, the envelope composed of protein can be attacked, so as to achieve the effect of inactivating viruses. After evaluation, it has a high killing rate against influenza viruses such as H1N1 and H3N2, which can meet the requirements of ISO18184, and can provide excellent protection after washing. The evaluation can achieve more than 50 times of washing with influenza virus protection.

The mask product made of the single-layer double-density single-guide fabric formed by the present invention can use each single-layer double-density to make a double-layer four-density and three-layer six-density structure based on the principle of multi-layer screens. When the resistance and exhalation resistance are in compliance with the GB2626-2006 and GB2626-2019 standards and the breathing valve is not added, the current double-layer four-density screen structure (the outer layer is not made of silica super oleophobic, water treatment ) Has been able to achieve KN75% (0.075 microns, 75 nanometers) filtration effect of 75% of the national CNAS laboratory test data, and at the same time can achieve KP66% (0.185 microns, 185 nanometers) filter efficiency reached 66% level, from the principle of fabric Above, in terms of structural principles, it is proved that the screen structure principle of single-layer multi-density fabric can effectively isolate and effectively filter dust, viruses, bacteria, and oily micro-particles. And because the material preparation itself is physical structure, density Constant, so it has the characteristics of long-term filtration efficiency without decreasing.

And through further experimental verification, using a three-layer six-density structure, inhalation resistance and expiration resistance are in line with GB2626-2006 and GB2626-2019 and YY/T 0469-2011 a number of national mandatory standards for respiratory products and medical recommended standards In the case of circumstance, the experimental data test results confirmed that the KN level filtration efficiency has reached more than 90%, and the KP efficiency has reached more than 80%, which has fully complied with the corresponding national mandatory international qualification standards for breathing.

The YY/T 0469-2011 standard experimental data uses a single-layer double-density surface material to make a silica array fiber embedded with nanotechnology, so it can effectively prevent the synthetic blood from penetrating, and the test standard results are qualified, and because the inner layer is ultra-fine Denier polypropylene fiber is naturally antibacterial, so the BFE result in the index also meets the standard.

The mask body made of the single-conductor fabric screen type principle formed by the present invention has a physical structure, so the filtration efficiency is constant and long-lasting, and because the single-conductor fabric itself has natural anti-ultraviolet (single layer double density), natural antibacterial ( The inner ultra-fine denier polypropylene layer), the fabric has an active pressure difference intelligent quick-drying working mode, so it can not only be machine-washed or hand-washed at will, but also because the single-conducting material combined with polypropylene and nylon/polyester and other chemical fibers has a certain material inertness, Therefore, it is possible to directly use 75% medical alcohol to directly spray and inactivate the mask made of this material, and wear it for a long time, and it has a rapid and active action on the skin-friendly nature of the human face and the hot and humid face of the nose and mouth. Exhaust and active absorption, and can maintain the effect for a long time, no peculiar smell is generated on the mouth and nose contact surface, and the subjective comfort is excellent.

The invention can completely solve the problem that the filtration efficiency of the disposable protective mask/medical surgical mask decreases directly after being worn for 4 hours. The physical structure, the density is constant, the filtration effect is long-lasting and stable, and it can be washed, machine washed, and directly sprayed with alcohol. The first impression is to reduce the expenditure on epidemic prevention consumption during a large-scale epidemic, save social costs, improve economic efficiency, and reduce the burden of enterprises and individuals. Existing disposable sterile grade surgical masks and industrial grade N90-95 masks save 60%-80% of the use cost respectively, and the social and economic benefits are extremely obvious;

The above examples only express several embodiments of the present invention, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention.

Claims

A long-lasting reusable N90 mask, comprising a mask body (1), characterized in that: the mask body (1) is composed of an inner layer (2) and an outer layer (3), and the inner layer (1) is composed of an inner layer (2) and an outer layer (3). 2) Using ultra-fine anhydrous drawing PP false twisted textured yarns above or below 75D, the outer layer (3) using nylon 160D above or below single 6 or double 6 high-strength air textured yarns or polyester 75D above or below With polypropylene false twisted textured yarn, the warp and weft are interlaced to achieve a single layer structure.
A method for preparing long-lasting and reusable N90 masks is characterized in that: the specific steps are:

Step 1: The inner layer is made of ultra-fine anhydrous drawn PP false-twist textured yarn of 75D or less;

Step 2: The outer layer is made of nylon 160D or less single 6 or double 6 high-strength air texturing yarn, or polyester 75D or less and polypropylene false twist texturing yarn picking warp and weft interlaced to achieve a single layer structure;

Step 3: Then in the form of picking, the two layers of special yarns, warp and weft, are interlaced to form a single-layer double-density screen structure.