TWI744141B - Blood and virus barrier waterproof and moisture permeable composite non-woven fabric - Google Patents

Abstract

The present invention is a blood and virus barrier waterproof, moisture-permeable composite non-woven fabric, which comprises: a non-woven fabric, the non-woven fabric has two surfaces, and the non-woven fabric basis weight ≦70g/m ² ; a multilayer breathable film, the multilayer breathable film is at least 3 Layer co-extruded film, the basis weight of the multilayer breathable film is between 5-30 g/m ² , the multilayer breathable film is attached to one of the surfaces of the non-woven fabric, and the weight percentage of the powder in the multilayer breathable film is 40-60 %, the drafting ratio≦300%; It is characterized by the synthetic blood permeability of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric, which can withstand a pressure of 2.0 psi for 1 minute; and the Phi- of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric The penetrability of X174 phage can withstand a pressure of 2.0 psi for 1 minute; the moisture permeability is ≧1500 g/m ² . 24hr; The average particle size of the powder in the multilayer breathable film is between 0.5~3μm; and the powder is made of calcium carbonate (CaCO3). Furthermore, the surface of the multi-layer breathable film of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric is coated with at least one moisture-permeable and waterproof coating.

Description

Blood and virus barrier waterproof and moisture permeable composite non-woven fabric

The present invention relates to the development of a waterproof and moisture-permeable composite non-woven fabric for blood and virus barrier, which is equipped with a P3 grade (CNS14798) waterproof and moisture-permeable composite non-woven fabric for medical protective clothing that blocks viruses, bacteria, blood infections and infections.

When the infectious disease outbreak broke out, the demand for medical protective equipment exploded in a short period of time, and the price of its medical protective equipment also increased. Countries began to pay attention to the shortage of protective equipment including protective clothing and masks. Among them, protective clothing must have high barrier properties, moisture permeability, water resistance, and lightweight tough membrane material requirements. European Union EN14126, US AAMI and Taiwan CNS standards all have standards for protective clothing for virus and bacterial epidemic prevention. Traditional P3 grade (CNS14798) medical protective clothing has poor air permeability and remains to be developed.

In the past, single-layer air-permeable films were unable to block the virus barrier due to the short air-permeable path of the holes. If the thickness was increased to lengthen the air-permeable path, it would not be able to meet the requirements of high air permeability. The prior art is still unable to achieve the optimal effect, resulting in poor comfort for the wearer of the protective clothing and unable to wear it for a long time. When an epidemic breaks out, the demand for protective clothing increases. Since medical staff need to wear protective clothing for a long time, the new generation of protective clothing needs to maintain a certain effect in protection, and the improvement of comfort will be the subject of future development.

The prior art research on the use of air-permeable composite sheet materials, as disclosed in the Republic of China Patent No. 089110815, is about an absorbent article having a top sheet, a back sheet, and an absorbent core between the top sheet and the back sheet. The backsheet comprises a composite sheet material that is water vapor permeable but substantially liquid impermeable, which comprises a spunbonded non-woven fabric bonded to a water vapor permeable thermoplastic film. The non-woven fabric includes a first layer composed mainly of fibers compatible with the adhesive used to bond the web, and a blend of fibers that are compatible with the adhesive and some incompatible, and a thermoplastic film. Second floor. Another prior art focuses on the research of moisture-permeable films. As disclosed in the Republic of China Patent No. 102144782, the moisture-permeable film can maintain air permeability, moisture permeability, mechanical strength and practicality, and is resistant to liquid permeability. The moisture-permeable film of the present invention is composed of a polyethylene resin composition (A) containing a polyethylene resin with a melting peak temperature of 130 to 150°C and a density of 0.940 to 0.970 g/cm 3, an inorganic filler (B), And styrene elastomer (C); and with respect to the total of 100 parts by mass of the polyethylene resin composition (A) and the inorganic filler (B), 1-20 mass parts of the styrene elastomer (C) are added Part of the resin composition; of which, the exudation area is less than 5%.

The prior art is directed to the study of a method for manufacturing a cloth with an antimicrobial compound. As disclosed in the Republic of China Patent No. 105106057, the antimicrobial compound is bound to or attached to the cloth. The treated cloth, the cloth itself can be used as a sterilizing material or a sterilizing material. The treated fabric also exhibits washing resistance and non-leaching properties. The dip solution used includes one or more antimicrobial agents, and a step of heat-treating the treated fabric. In addition, the prior art studies on the composite fabric coating of blood and virus barriers, as disclosed in the Republic of China Patent No. 099118884, a composite fabric including a non-woven fabric, a fully calendered non-woven fabric of fusible fibers is better; and a single sheet The sheet is a breathable polymer layer, which is on at least one surface of the fabric and has excellent breathability, good abrasion resistance and protection against both blood and viral agents. A composite fabric comprising a monolithic coating on a fibrous substrate fabric, the composite having an MVTR of at least 1500 g/m²/day and passing both the ASTM F1670 blood barrier test and the ASTM F1671 virus barrier test.

The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric must have high moisture permeability and prevent blood and viruses from penetrating; in other words, the surface of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric must be drip-proof, but the gas must be able to discharge. The present invention is a blood and virus barrier waterproof, moisture-permeable composite non-woven fabric, which comprises: a non-woven fabric, the non-woven fabric has two surfaces, and the non-woven fabric basis weight ≦70g/m ² ; a multilayer breathable film, the multilayer breathable film is at least 3 Layer co-extruded film, the basis weight of the multilayer breathable film is between 5-30 g/m ² , the multilayer breathable film is attached to one of the surfaces of the non-woven fabric, and the weight percentage of the powder in the multilayer breathable film is 40-60 %, the drafting ratio≦300%; It is characterized by the synthetic blood permeability of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric, which can withstand a pressure of 2.0 psi for 1 minute; and the Phi- of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric The penetrability of X174 phage can withstand a pressure of 2.0 psi for 1 minute; the moisture permeability is ≧1500 g/m ² . 24hr; The average particle size of the powder in the multi-layer breathable film is between 0.5~3μm; and the powder is made of calcium carbonate (CaCO ₃ ). Wherein, the non-woven fabric is at least one water needle non-woven fabric, needle-bonded non-woven fabric, spun-bonded non-woven fabric and melt-blown non-woven fabric. The fiber diameter of the non-woven fabric is 0.5-40μm. The fiber material of the non-woven fabric is at least one polyethylene, polypropylene, polyester, polyvinyl alcohol, rayon, cotton, polyurethane, and Styrene-Ethylene/Butylene -Styrene copolymer. The multi-layer breathable film is a three-layer co-extruded film with a layer ratio of 1:1:1, 1:2:1, 1:3:1, 1:4:1 or 1:5:1. The weight percentage of powder in the multilayer air-permeable film is 40-60%, and the moisture permeability is ≧1500 g/m ² . 24hr. The basis weight of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric is 40~100 g/m ² , and the moisture permeability is ≧1500 g/m ² . 24hr. The average particle size of the powder in the multi-layer breathable film of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric is 2μm, and the moisture permeability is ≧1500 g/m ² . 24hr. Furthermore, the surface of the multi-layer breathable film of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric is coated with at least one moisture-permeable and waterproof coating, so that the overall moisture permeability can reach ≧1500 g/m2. 24hr. Among them, at least one of waterborne polyurethane and solventborne polyurethane is selected for the moisture-permeable waterproof coating. The blood and virus barrier waterproof, moisture-permeable composite non-woven fabric of the present invention has at least three layers of co-extruded multi-layer air-permeable film to partially block or extend the air-permeable passage. And the multi-layer breathable film is attached to the surface of the non-woven fabric. It is different from the past knowledge and skills, and its novelty, progress and practical benefits are correct. Regarding the techniques, methods and effects used in this creation, I will give a preferred embodiment and detailed descriptions in conjunction with the diagrams. I believe that the above-mentioned purpose, structure and features of this creation should be thoroughly and concretely understood. .

The following is a specific embodiment to illustrate the implementation of this creation. Those who are familiar with this technique can easily understand the other advantages and effects of this creation from the content disclosed in this manual. This creation can also be implemented or applied by other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the spirit of this creation.

First of all, please refer to Figure 1 which shows the cross-sectional structure diagram of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric of this creation to illustrate the embodiment of the present invention. It is a blood and virus barrier waterproof and moisture permeable composite nonwoven fabric, which includes: A non-woven fabric 201, the non-woven fabric 201 has two surfaces, and the basis weight of the non-woven fabric 201 ≦70g/m ² ; a multi-layer breathable film 101, the multi-layer breathable film 101 is a co-extruded film of at least 3 layers, and the multi-layer breathable film 101 has a basis weight Between 5～30 g/m ² , the multilayer air-permeable film 101 is attached to one of the surfaces of the non-woven fabric 201, the weight percentage of the powder 1014 in the multilayer air-permeable film 101 is 40-60%, and the draft ratio ≦300% It is characterized in that the synthetic blood permeability of the blood and virus barrier waterproof and moisture permeable composite non-woven fabric can withstand a pressure of 2.0 psi for 1 minute; and the blood and virus barrier waterproof and moisture permeable composite non-woven fabric has Phi-X174 phage permeability and can withstand pressure 2.0 psi for 1 minute; moisture permeability≧1500 g/m ² . 24hr; the average particle size of the powder 1014 in the multilayer breathable film 101 is between 0.5-3 μm; and the powder 1014 is made of calcium carbonate (CaCO ₃ ). Wherein, the non-woven fabric 201 is at least one water needle non-woven fabric, needle-punched non-woven fabric, spun-bonded non-woven fabric and melt-blown non-woven fabric. The fiber diameter of the non-woven fabric 201 is 0.5-40 μm. The fiber material of the non-woven fabric 201 is at least one polyethylene, polypropylene, polyester, polyvinyl alcohol, rayon, cotton, polyurethane and styrene (Styrene)-Ethylene/Butylene (Butylene) )-Styrene (Styrene) copolymer. The multi-layer breathable film 101 is a three-layer co-extruded film with a layer ratio of 1:1:1, 1:2:1, 1:3:1, 1:4:1, or 1:5:1. The content of the powder 1014 in the multi-layer breathable film 101 is 40-60% by weight, and the moisture permeability is ≧1500 g/m ² . 24hr (CNS 12222). The basis weight of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric is 40~100 g/m ² , and the moisture permeability is ≧1500 g/m ² . 24hr (CNS 12222), water pressure resistance≧140cmH ₂ O, impact penetration≦0.5g (CNS 14801), tensile strength in warp direction≧50N (ASTM D 5034), tensile strength in weft direction≧40N (ASTM D 5034), Bursting strength≧2000kPa, suture strength≧40N, tear strength in warp direction≧20N (ASTM D 4533), tear strength in weft direction≧20N (ASTM D 4533), synthetic blood penetration through pressure>13.8 kPa test results show no Penetration (CNS14799), and virus penetration test results show no penetration (CNS14800) at a pressure> 13.8 kPa, that is, it has passed the CNS14798 national standard P3 level test. The impact penetration test method is to fix the sample on an experimental platform inclined at 45 degrees, fill a bucket-shaped container 0.6 meters away from the experimental platform with 500 c.c. of water, impact the surface of the fabric, and then absorb the back water with absorbent paper Bead weighing≦0.5g. The average particle size of the powder 1014 in the blood and virus barrier waterproof, moisture-permeable composite non-woven multilayer breathable film 101 is 2μm, and the moisture permeability is ≧1500 g/m ² . 24hr (CNS 12222). Figure 2 is a schematic diagram showing the cross-sectional structure of another embodiment of the blood and virus blocking waterproof and moisture-permeable composite nonwoven fabric of the present invention. Furthermore, the surface of the blood and virus blocking waterproof and moisture-permeable composite nonwoven fabric 101 is coated with at least one layer The moisture-permeable waterproof coating 301 makes the overall moisture permeability of ≧1500 g/m ² . 24hr (CNS 12222). Wherein, the moisture-permeable waterproof coating 301 is selected from at least one of waterborne polyurethane and solventborne polyurethane. The thickness of the moisture-permeable waterproof coating 301 can be thinned to reduce the material usage of the moisture-permeable waterproof coating 301. The moisture-permeable waterproof coating 301 is scratch resistant, prevents the printed matter on the surface of the multilayer breathable film 101 from falling off, and assists in lifting The temperature-resistant dimensional stability of the multi-layer breathable film 101 improves the yield of garment products during heat-sealing processing. The moisture-permeable and waterproof coating 301 adopts a smooth and shiny structure or a matte structure, which can change the visual effect of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric of the present invention.

In order to enable the reviewer to further understand that the actual test results of this creation have unpredictable effects, a comparative example of a single-layer breathable film laminated with a non-woven fabric includes: a non-woven fabric 201, which is the same as the non-woven fabric 201 of the embodiment, and the non-woven fabric 201 has On the second surface, the basis weight of the non-woven fabric 201 is less than or equal to 70g/m ² ; a single-layer air-permeable film, the single-layer air-permeable film is an extruded film, and the single-layer air-permeable film has a basis weight of 5-30 g/m ² , and The breathable film is attached to one of the surfaces of the non-woven fabric 201. The single-layer breathable film contains powder 1014, which is the same as the powder 1014 of the embodiment, and the powder 1014 has a weight percentage content of 40-60%, and a draft ratio≦300 %; It is characterized in that the synthetic blood permeability of the single-layer breathable film laminated with non-woven fabric can withstand a pressure of 2.0 psi for 1 minute; and the single-layer breathable film laminated with a non-woven fabric has a Phi-X174 phage penetration resistance of 2.0 psi for 1 minute minutes, the test results Phi-X174 bacteriophage <1 PFU / ml; moisture permeability ≧ 1500 g / m ² .24hr; breathable film 1014 in a single layer powder average particle size is between 0.5 ~ 3μm; 1014 and the selection carbonate powder Calcium (CaCO ₃ ). Wherein, the non-woven fabric 201 is at least one water needle non-woven fabric, needle-punched non-woven fabric, spun-bonded non-woven fabric and melt-blown non-woven fabric. The fiber diameter of the non-woven fabric 201 is 0.5-40 μm. The fiber diameter of the non-woven fabric 201 is 2 to 5 μm. The fiber material of the non-woven fabric 201 is at least one polyethylene, polypropylene, polyester, polyvinyl alcohol, rayon, cotton, polyurethane and styrene (Styrene)-Ethylene/Butylene (Butylene) )-Styrene (Styrene) copolymer. The single-layer air-permeable film contains 40-60% of powder 1014 by weight, and the moisture permeability is ≧1500 g/m ² . 24hr (CNS 12222). The single-layer breathable film is laminated with non-woven fabric with a basis weight of 40~100 g/m ² and a moisture permeability of ≧1500 g/m ² . 24hr (CNS 12222), water pressure resistance≧140cmH ₂ O, impact penetration≦0.5g (CNS 14801), tensile strength in warp direction≧50N (ASTM D 5034), tensile strength in weft direction≧40N (ASTM D 5034), Bursting strength≧2000kPa, stitching strength≧40N, tearing strength in warp direction≧20N (ASTM D 4533), tearing strength in weft direction≧20N (ASTM D 4533), this single-layer breathable film is laminated to a single-layer breathable film of non-woven fabric The powder 1014 has an average particle size of 2μm and a moisture permeability of ≧1500 g/m ² . 24hr (CNS 12222). The synthetic blood permeability of the single-layer breathable film laminated with the non-woven fabric showed no penetration (CNS14799) through the test result of pressure> 13.8 kPa, but the test result of virus penetration rate> 13.8 kPa showed that there was penetration (CNS14800). That is, it failed the CNS14798 national standard P3 level test.

From the examples and comparative examples of the present invention, it is found that the multi-layer breathable film 101 of the present invention has the effect of blocking viruses, and mainly has a three-layer structure of co-extruded breathable film. Its function and characteristics are as shown in the first layer of the first layer. The film 1011 is the outermost layer that will contact the phage suspension, and most of the phage suspension needs to be blocked. Therefore, it needs to have the characteristics of a small number of holes, a wide pore size distribution and a high film thickness, and the film surface is dense and water-repellent to block the suspension. The second layer of breathable film 1012 is because the phage may still be wetted by the calcium carbonate powder by the suspension, and diffuse and penetrate, so as to minimize the concentration of the contact phage. The powder 1014 of this layer is finer and has a smaller pore size. To avoid wet penetration. The third layer of breathable film 1013 is to block all viruses from penetrating. The size of the powder 1014 needs to be different from that of the interception layer to avoid the formation of continuous holes in order to achieve a complete barrier effect. At the same time, the design of the inner layer with large pores and multiple micropores is also It can improve the moisture permeability formed by the vapor pressure of the inner layer, and improve the wearing comfort. The multi-layer breathable film 101 of the present invention is designed to develop the highest level of protection against blood and viruses, waterproof and moisture-permeable composite non-woven fabrics by designing the number of holes, pore size, and film thickness of each film layer.

The present invention is a blood and virus barrier, waterproof, moisture-permeable composite non-woven fabric, which has the characteristics of blood and virus barrier properties. It is penetrated by the thickness design of each layer of the multi-layer breathable film 101 and the powder 1014 composition to create the characteristics of each layer of melt flow. It can partially block or extend the air passage. The material composition and manufacturing conditions have been fully disclosed. Compared with the comparative example, it has an unexpected effect. It is different from the conventional techniques in the past. It is novel, advanced, and innovative. The practical benefits are correct. Therefore, it can effectively improve the lack of knowledge, and has considerable practicality in use.

In summary, the specific structure disclosed in this creative embodiment can indeed provide blood and virus barrier, waterproof and moisture-permeable composite non-woven blood and Phi-X174 bacteriophage penetrability, pressure resistance 2.0 psi for 1 minute; moisture permeability ≧1500 g/ m ² . For the 24hr protective clothing application, the structure needs to be up to specifications. It is not easy to combine and complete. In terms of the overall structure, it has the advantages of lightweight and unpredictable wearing comfort. It has not been seen in similar products and has not been seen before application. Open, sincerity has met the statutory requirements of the Patent Law, and Yan has filed an application for a patent for invention in accordance with the law.

However, the above is only one of the preferred embodiments of this creation, and should not be used to limit the scope of implementation of this creation, that is, all equivalent changes and modifications made in accordance with the scope of the patent application for this creation and the content of the creation specification are all Should still be within the scope of this creation patent.

101: Multilayer breathable film 1011: The first layer of breathable film 1012: The second layer of breathable film 1013: The third layer of breathable film 1014: powder 201: Non-woven 301: Moisture-permeable waterproof coating

Figure 1 is a schematic diagram showing the cross-sectional structure of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric of this creation. Figure 2 is a schematic diagram showing the cross-sectional structure of another embodiment of the blood and virus barrier waterproof and moisture-permeable composite nonwoven fabric of the present invention.

101: Multilayer breathable film

1011: The first layer of breathable film

1012: The second layer of breathable film

1013: The third layer of breathable film

1014: powder

201: Non-woven

Claims (10)

A blood and virus barrier waterproof and moisture-permeable composite non-woven fabric, which comprises: a non-woven fabric with two surfaces and a basis weight of the non-woven fabric ≦70g/m ² ; a multi-layer breathable film with at least 3 layers of co-extruded Film, the basis weight of the multilayer air-permeable film is between 5-30 g/m ² , the multilayer air-permeable film is attached to one of the surfaces of the non-woven fabric, and the weight percentage of the powder in the multi-layer air-permeable film is 40-60%. Magnification≦300%; It is characterized by the synthetic blood permeability of the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric, which can withstand a pressure of 2.0 psi for 1 minute; and the blood and virus barrier waterproof and moisture-permeable composite non-woven fabric’s Phi-X174 phage penetration Resistance to pressure 2.0 psi for 1 minute; moisture permeability ≧1500 g/m ² . 24hr; The average particle size of the powder in the multi-layer breathable film is between 0.5~3μm; and the powder is made of calcium carbonate (CaCO ₃ ). The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric according to claim 1, wherein the non-woven fabric is at least one water needle non-woven fabric, needle-punched non-woven fabric, spun-bonded non-woven fabric and melt-blown non-woven fabric. The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric according to claim 1, wherein the fiber diameter of the non-woven fabric is 0.5-40 μm. The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric according to claim 1, wherein the fiber material of the non-woven fabric is at least one polyethylene, polypropylene, polyester, polyvinyl alcohol, rayon, cotton, polyurethane Ester and Styrene-Ethylene/Butylene-Styrene copolymer. The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric according to claim 1, wherein the multi-layer breathable film is a three-layer co-extruded film with a layer ratio of 1:1:1, 1:2:1, 1:3 :1, 1:4:1 or 1:5:1. The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric according to claim 1, wherein the weight percentage of powder in the multi-layer breathable film is 40-60%, and the moisture permeability is ≧1500 g/m ² . 24hr. The blood and virus barrier waterproof and moisture permeable composite nonwoven fabric as described in claim 1, wherein the basis weight of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric is 40~100 g/m ² , and the moisture permeability is ≧1500 g/m ² . 24hr. The blood and virus barrier waterproof and moisture-permeable composite nonwoven fabric according to claim 1, wherein the average particle size of the powder in the multi-layer breathable film of the blood and virus barrier, waterproof and moisture-permeable composite non-woven fabric is 2μm, and the moisture permeability is ≧1500 g/m ² . 24hr. The blood and virus barrier waterproof and moisture permeable composite nonwoven fabric as described in claim 1, and further, the surface of the multilayer breathable film of the blood and virus barrier waterproof and moisture permeable composite nonwoven fabric is coated with at least one layer of moisture permeable and waterproof coating to make the overall moisture permeability reach ≧1500 g/m ² ． 24hr. The blood and virus barrier waterproof and moisture-permeable composite non-woven fabric according to claim 9, wherein the moisture-permeable and waterproof coating is selected from at least one of waterborne polyurethane and solventborne polyurethane.

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