Medical composite nonwoven fabric, its manufacturing method, and article

Abstract

The present invention relates to a medical composite nonwoven fabric, a method for producing the same, and an article made from the same, and the composite nonwoven fabric has antistatic properties and alcohol repellency.

Description

[Technical field]

[0001] The present invention relates to a medical composite nonwoven fabric, a manufacturing method thereof, and an article made from the fabric, and more specifically to a medical composite nonwoven fabric having excellent water pressure resistance and alcohol repellency and low surface resistance, a manufacturing method thereof, and an article made from the fabric. [Background technology]

[0002] Conventionally, after a nonwoven fabric is produced, the nonwoven fabric is immersed in an antistatic and alcohol-repellent liquid and then dried to obtain a final nonwoven fabric. However, as mentioned above, if a separate post-processing is performed, not only will the water pressure resistance required for medical nonwoven fabrics be reduced, but there will also be problems in that the production costs will increase. Summary of the Invention [Problem to be solved by the invention]

[0003] An embodiment of the present invention provides a medical composite nonwoven fabric having excellent water pressure resistance and alcohol repellency and low surface resistance. Another aspect of the present invention provides a method for producing the medical composite nonwoven fabric. Yet another aspect of the present invention provides an article comprising the composite nonwoven fabric described above. [Means for solving the problem]

[0004] One aspect of the present invention is Provided is a medical composite nonwoven fabric having antistatic properties and alcohol repellency. The medical composite nonwoven fabric includes a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer and a second spunbond nonwoven fabric layer, and the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each have antistatic properties and alcohol repellency.

[0005] The meltblown nonwoven fabric layer may have antistatic and alcohol repellent properties. The meltblown nonwoven fabric layer does not have at least one of antistatic property and alcohol repellency.

[0006] The medical composite nonwoven fabric also includes the first spunbond nonwoven fabric layer, the meltblown nonwoven fabric layer and the second spunbond nonwoven fabric layer in that order. The first spunbond nonwoven layer and the second spunbond nonwoven layer also each include a plurality of spunbond nonwoven sub-layers.

[0007] The meltblown nonwoven layer may also include a plurality of meltblown nonwoven sub-layers. The medical composite nonwoven fabric also further includes at least one additional layer.

[0008] The medical composite nonwoven fabric has a water pressure resistance of 700 mmH2O or more as measured by WSP 80.6(09), an alcohol repellency of grade 8 or more as measured by WSP 80.8(05), and a surface resistance of 10 or more as measured by WSP 40.2(05). 12 It is also less than Ω. The medical composite nonwoven fabric has a water pressure resistance of 800 mmH2O or more as measured by WSP 80.6(09), an alcohol repellency of grade 9 or more as measured by WSP 80.8(05), and a surface resistance of 10 12 It is also less than Ω.

[0009] Another aspect of the present invention is A step of continuously forming a spunbond nonwoven fabric layer (S10); (S20) continuously forming a meltblown nonwoven layer on the spunbond nonwoven layer; The step of continuously forming the spunbonded nonwoven fabric layer (S10) includes a step of continuously forming free fibers using a nonconductive polymer (S10-1), a step of continuously spinning the free fibers (S10-2), a step of continuously accumulating the free fibers to continuously form a spunbonded nonwoven fabric (S10-3), and a step of continuously spraying a first liquid containing an antistatic agent and an alcohol repellent agent onto the formed spunbonded nonwoven fabric to continuously surface treat the spunbonded nonwoven fabric (S10-4). The step of continuously forming the meltblown nonwoven fabric (S20) includes a step of continuously forming free fibers using a nonconductive polymer (S20-1), continuously spinning the free fibers (S20-2), continuously accumulating the free fibers to continuously form a meltblown nonwoven fabric (S20-3), and continuously spraying a second liquid containing an alcohol repellent onto the formed meltblown nonwoven fabric to continuously surface-treat the meltblown nonwoven fabric (S20-4).

[0010] The spunbond nonwoven continuous surface treatment step (S10-4) and the meltblown nonwoven continuous surface treatment step (S20-4) may also be performed by continuously spraying each of the liquids together with a gas.

[0011] The method for producing the medical composite nonwoven fabric may further include a step (S30) of continuously forming another spunbond nonwoven fabric layer on the meltblown nonwoven fabric layer in the same manner as the step (S10) of continuously forming the spunbond nonwoven fabric layer.

[0012] The method for producing a medical composite nonwoven fabric may further include, after the step of continuously forming the meltblown nonwoven fabric layer (S20) or the step of continuously forming another spunbonded nonwoven fabric layer (S30), a step of continuously heat-compressing the spunbonded nonwoven fabric layers to one or both sides of the meltblown nonwoven fabric layer (S40).

[0013] The manufacturing method of the medical composite nonwoven fabric does not include additional post-processing and drying steps.

[0014] Yet another aspect of the present invention is An article is provided that includes the medical composite nonwoven fabric. The article may also be a surgical drape or gown. Effect of the Invention

[0015] The composite nonwoven fabric according to an embodiment of the present invention has the advantages of excellent water pressure resistance and alcohol repellency, low surface resistance, and low manufacturing costs. [Brief description of the drawings]

[0016] [Figure 1] 1 is a schematic diagram illustrating a medical composite nonwoven fabric according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, a medical composite nonwoven fabric according to an embodiment of the present invention will be described in detail. In this specification, the term "nonwoven fabric composite" refers to a nonwoven fabric in which two or more types of nonwoven fabrics are manufactured in a single device through a continuous process and integrated with each other, rather than a nonwoven fabric laminate manufactured through a separate lamination process after two or more types of nonwoven fabrics are manufactured separately. Therefore, in this specification, the "composite nonwoven fabric" is also called a "monolithic nonwoven fabric." The medical composite nonwoven fabric has stronger interlayer bonding and excellent shape stability and filtration performance compared to the nonwoven fabric laminate.

[0018] In the present specification, the "spunbonded nonwoven fabric layer having antistatic properties and alcohol repellency" is also produced by a continuous process. Specifically, the "spunbonded nonwoven fabric layer having antistatic properties and alcohol repellency" is also produced by sequentially or simultaneously carrying out "production of spunbonded nonwoven fabric" and "surface treatment for imparting antistatic properties and alcohol repellency" in a continuous process.

[0019] In this specification, the "tensile strength" is measured by pulling a 5 cm wide test piece (grip spacing during evaluation: 10 cm) at a pulling speed of 500 mm / min using a tensile strength / extensometer (Instron) based on KSK 0520, and measuring the tensile strength in the MD (mechanical direction).

[0020] In addition, in this specification, "bending resistance" is measured in mm in accordance with the measurement standard WSP (Worldwide Strategic Partners) 90.1 by taking 16 samples (25 mm x 150 mm) in the MD and CD directions, placing the samples on a bending resistance tester, pushing the test piece in the direction of the inclined surface until it abuts against the inclined surface, and measuring the length of the sample from the bending point to the point where it abuts against the inclined surface.

[0021] In the present specification, the "alcohol-repellent meltblown nonwoven fabric layer" is also produced by a continuous process. Specifically, the "alcohol-repellent meltblown nonwoven fabric layer" is also produced by sequentially or simultaneously carrying out "manufacturing a meltblown nonwoven fabric" and "surface treatment for imparting alcohol repellency" in a continuous process.

[0022] In addition, in this specification, the "water pressure resistance" is measured according to WSP (Worldwide Strategic Partners) 80.6(09) using a water pressure resistance measuring device (Model FX-3000-4M (manufactured by TEXTEST)).

[0023] In addition, in this specification, "having antistatic properties" means that the surface resistance measured according to WSP 40.2(05) is 10 15 This means that the resistance is less than or equal to Ω.

[0024] In addition, in this specification, the "surface resistance" is measured using a surface resistance measuring device (Model R8340A (manufactured by ADVANTEST)) according to WSP 40.2(05).

[0025] In addition, in this specification, "having alcohol repellency" means that the alcohol repellency measured according to WSP 80.8(05) is grade 4 or higher.

[0026] The medical composite nonwoven fabric according to an embodiment of the present invention has antistatic properties and alcohol repellency.

[0027] The medical composite nonwoven fabric also includes a first spunbond nonwoven layer, a meltblown nonwoven layer and a second spunbond nonwoven layer. Specifically, the medical composite nonwoven fabric also includes a first spunbond nonwoven layer, a meltblown nonwoven layer and a second spunbond nonwoven layer, which are manufactured by a continuous process in one device and integrated with each other.

[0028] The first spunbond nonwoven layer and the second spunbond nonwoven layer may each have antistatic properties and alcohol repellency. Specifically, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer each also contain an antistatic agent and an alcohol repellent agent.

[0029] The antistatic agent is also hydrophobic. In addition, the first spunbonded nonwoven fabric layer and the second spunbonded nonwoven fabric layer each further contain a penetrating agent for facilitating the penetration of the antistatic agent and the alcohol repellent agent into the interior of the nonwoven fabric.

[0030] The penetrating agent serves to improve the wettability of the antistatic agent and the alcohol repellent agent in each of the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer, and to improve the permeation performance into each of the spunbond nonwoven fabric layers.

[0031] The penetrant may also include an alcohol-based compound, a hydroxy-based compound, or a combination thereof.

[0032] For example, the first spunbond nonwoven layer and the second spunbond nonwoven layer each also include an antistatic / alcohol repellent masterbatch.

[0033] The antistatic agents are mainly classified into anionic, cationic, nonionic and amphoteric types, among which anionic and nonionic types are frequently used for antistatic processing. In general, cationic and amphoteric types are rarely used as components of fiber spinning and spinning emulsion, but are used as antistatic agents to give flexibility to the final product. Anionic types include sulfonate type (RSO3Na), sulfate type (ROSO3Na, ROSO3NH(CH2CH2OH)3Na, RO(CH2CH2O)SO3Na), and phosphate type, and since the phosphate type has good antistatic properties, it is widely used alone or mixed with other preparations. Generally, in the molecular structure of the antistatic agent, the number of carbon atoms of the aliphatic group, the degree of lactation, the degree of phosphorylation, and the position of the hydrophilic group are closely correlated with the antistatic performance of sulfate ester and phosphate ester products. Cationic types, classified as follows, include amine salt type (RNH2CH3COOH), quaternary ammonium salt type (RCONHC3H6N(CH3)2CH2CH2OH〕X (X=NO3,ClO4)), etc., and have good antistatic properties, compatibility with other products, and flexibility, and are widely used in post-processing processes, but because they contain nitrogen in the molecule, they can cause discoloration due to oxidation, chlorine damage due to chlorine bleaching, and have problems such as contamination with metal ions and adsorption, so care must be taken when using them. Nonionic types generally have low adsorption power to fibers, good smoothness, and show uniform wettability to synthetic fibers, and are polyoxyethylene fatty acid ester type (R-COO(CH2CH2O) n H), polyoxyethylene alkyl ether type (RO(CH2CH2O) nH), polyoxyethylene alkylphenol ether type, and polyoxyethylene alkylamine type, which are widely used as spinning emulsions for synthetic fibers. Amphoteric ions, which contain both cationic and anionic amphoteric polar groups in the same molecule, have superior cationic performance and feel, and are characterized by less chlorine damage. There are betaine and imidazoline types, and generally, the betaine type is widely used. Durable antistatic agents have excellent flexibility and heat resistance, do not change over time, do not reduce color fastness, and are used in resin processing agents, water repellents, repellents, etc. It is required that it can be used in combination with oils and that it is durable and does not attract dust. Most of the durable antistatic agents are cationic polymer compounds or electrolytic polymer compounds with strong water absorption, such as polyacrylic acid derivatives, polyvinylamine derivatives, polyamide derivatives, and cationic resins, and among them, the representative one is polyacrylic acid derivatives having cationic side chains, and there are a method of treating a fiber with polybeta methacryloxyethyl dimethylethyl ammonium methsulfate, and then post-treating with an anionic surfactant to form a complex on the fiber, a method of treating the complex dispersed as a nonionic surfactant, a method of treating a fiber with a polyamine containing polyethylene oxide in combination with a crosslinking agent, and then forming an insolubilized three-dimensional network structure on the fiber surface by heat treatment, and the like.

[0034] The alcohol repellent may also include a perfluoroalkyl material, a polyfluoroalkyl material, or a combination thereof. The perfluoroalkyl substance also includes a perfluorinated alkyl acid (PFAA). The perfluorinated alkyl acids may include perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), or a combination thereof. As an example, the meltblown nonwoven fabric layer may have antistatic and alcohol repellent properties.

[0035] Specifically, the meltblown nonwoven layer also contains an antistatic agent and an alcohol repellent agent. In addition, the antistatic agent and the alcohol repellent agent contained in the meltblown nonwoven fabric layer are the same as the antistatic agent and the alcohol repellent agent contained in each of the spunbond nonwoven fabric layers, respectively.

[0036] As another example, the meltblown nonwoven fabric layer does not have at least one of antistatic property and alcohol repellency.

[0037] The medical composite nonwoven fabric may include the first spunbond nonwoven fabric layer, the meltblown nonwoven fabric layer, and the second spunbond nonwoven fabric layer in that order. However, the present invention is not limited thereto, and the medical composite nonwoven fabric may include the first spunbond nonwoven fabric layer, the meltblown nonwoven fabric layer, and the second spunbond nonwoven fabric layer in a different order.

[0038] The first spunbond nonwoven layer and the second spunbond nonwoven layer each include a plurality of spunbond nonwoven sub-layers, specifically, the first spunbond nonwoven layer and the second spunbond nonwoven layer each include a plurality of spunbond nonwoven sub-layers that are manufactured in a continuous process on a single device and integrated with one another.

[0039] The meltblown nonwoven layer also includes a plurality of meltblown nonwoven sub-layers, specifically, the meltblown nonwoven layer also includes a plurality of meltblown nonwoven sub-layers each manufactured by a continuous process in one device and integrated with each other.

[0040] The at least one spunbond nonwoven fabric and the at least one meltblown nonwoven fabric included in the medical composite nonwoven fabric each independently contain a non-conductive polymer. The non-conductive polymer may also include polyolefins, polystyrenes, polycarbonates, polyesters, polyamides, copolymers thereof, or combinations thereof.

[0041] The polyolefin may include polyethylene, polypropylene, poly-4-methyl-1-pentene, polyvinyl chloride, or a combination thereof. The polyester may also include polyethylene terephthalate, polylactic acid, or a combination thereof.

[0042] In the medical composite nonwoven fabric, the total content of the meltblown nonwoven fabric is 3 to 50 parts by weight per 100 parts by weight of the total weight of the composite nonwoven fabric. If the total content of the meltblown nonwoven fabric is within the above range, a composite nonwoven fabric having excellent shape stability and durability can be obtained.

[0043] The medical composite nonwoven fabric has a basis weight (mass per unit area) of 10 to 500 g / m 2 , for example, 20 to 100 g / m 2 It is also in the range. The multiple nonwoven fabrics contained in the medical composite nonwoven fabric are integrated (ie, bonded) to one another by thermal fusion rather than ultrasonic fusion.

[0044] The medical composite nonwoven fabric also further includes at least one additional layer. By way of example, each of the additional layers may be neither a spunbond nonwoven nor a meltblown nonwoven, and may include one or more separate nonwovens. As another example, each of the additional layers may include one or more layers of other materials than a nonwoven fabric.

[0045] The medical composite nonwoven fabric has a MD tensile strength of 0.1 to 0.3 kgf / 5 cm / gsm, 0.15 to 0.3 kgf / 5 cm / gsm, 0.20 to 0.3 kgf / 5 cm / gsm, or 0.25 to 0.30 kgf / 5 cm / gsm. Here, gsm stands for g / m 2and means the weight per unit area of ​​the composite nonwoven fabric.

[0046] The medical composite nonwoven fabric also has a bending resistance in the MD direction of 20 mm or more, 25 mm or more, 30 mm or more, or 35 mm or more. The medical composite nonwoven fabric also has a bending resistance in the CD direction of 10 mm or more, 15 mm or more, 20 mm or more, 25 mm or more, or 30 mm or more.

[0047] The medical composite nonwoven fabric has a water pressure resistance, measured according to WSP 80.6(09), of 700 mmH2O or more, 720 mmH2O or more, 740 mmH2O or more, 760 mmH2O or more, 780 mmH2O or more, 800 mmH2O or more, 820 mmH2O or more, 840 mmH2O or more, 860 mmH2O or more, 880 mmH2O or more, or 900 mmH2O or more.

[0048] In addition, the medical composite nonwoven fabric has an alcohol repellency of grade 8 or higher or grade 9 or higher as measured by WSP 80.8(05). The medical composite nonwoven fabric has a surface resistance of 10 12 Ω or less, 10 11 Ω or less, 10 10 Ω or less, 10 9 Ω or less or 10 8 It is also less than Ω.

[0049] The present inventors have first developed a method for manufacturing a nonwoven fabric having a special configuration, as described below, and have produced a nonwoven fabric having a water pressure resistance of 800 mmH2O or more as measured by WSP 80.6(09), an alcohol repellency of 9 or more as measured by WSP 80.8(05), and a surface resistance of 10 12 It was possible to produce a medical composite nonwoven fabric with a hardness of less than Ω.

[0050] Hereinafter, a method for manufacturing a medical composite nonwoven fabric according to an embodiment of the present invention will be described in detail. A method for manufacturing a medical composite nonwoven fabric according to an embodiment of the present invention includes a step of continuously forming a spunbond nonwoven fabric layer (S10), and a step of continuously forming a meltblown nonwoven fabric layer on the spunbond nonwoven fabric layer (S20).

[0051] The spunbond nonwoven fabric layer continuous formation step (S10) is a step of forming fiber yarn by melt extruding, cooling and stretching a thermoplastic nonconductive polymer, and then laminating the fiber yarn on a screen belt to form a web.

[0052] Specifically, the step of continuously forming the spunbonded nonwoven fabric layer (S10) includes a step of continuously forming free fibers using a nonconductive polymer (S10-1), a step of continuously spinning the free fibers (S10-2), a step of continuously accumulating the free fibers to continuously form a spunbonded nonwoven fabric (S10-3), and a step of continuously spraying a first liquid containing an antistatic agent and an alcohol repellent agent onto the formed spunbonded nonwoven fabric to continuously treat the surface of the spunbonded nonwoven fabric (S10-4).

[0053] The spunbond nonwoven continuous surface treatment step (S10-4) may also be performed by continuously spraying the first liquid together with a gas (eg, air).

[0054] The first liquid is also prepared by adding the antistatic agent and the alcohol repellent agent to a solvent (eg, water). The first liquid further contains the above-mentioned penetrating agent in addition to the antistatic agent and the alcohol repellent agent. The first liquid may be either a solution or a suspension.

[0055] The meltblown nonwoven fabric layer continuous formation step (S20) is a step in which a thermoplastic nonconductive polymer is melt-extruded, hot-air-drawn, and cooled to form a fiber yarn, and then the fiber yarn is laminated on the spunbond web formed in the spunbond nonwoven fabric layer continuous formation step (S10) to form a web.

[0056] Specifically, the step of continuously forming the meltblown nonwoven fabric layer (S20) includes a step of continuously forming free fibers using a nonconductive polymer (S20-1), a step of continuously spinning the free fibers (S20-2), a step of continuously accumulating the free fibers to continuously form a meltblown nonwoven fabric (S20-3), and a step of continuously spraying a second liquid containing an antistatic agent and / or an alcohol repellent agent onto the formed meltblown nonwoven fabric to continuously treat the surface of the meltblown nonwoven fabric (S20-4).

[0057] The meltblown nonwoven continuous surface treatment step (S20-4) may also be performed by continuously spraying the second liquid together with a gas (eg, air).

[0058] The second liquid is also prepared by adding the antistatic agent and / or the alcohol repellent agent to a solvent (eg, water). The second liquid further contains the above-mentioned penetrating agent in addition to the antistatic agent and the alcohol repellent agent. The second liquid may be either a solution or a suspension.

[0059] Also, the step (S20) does not include the step (S20-4). The inventors have developed a surface treatment device that sprays a first or second liquid together with air onto a spunbonded or meltblown nonwoven fabric layer in a two-fluid form, and allows liquid particles with sufficient kinetic energy to come into contact with the nonwoven fabric web with a small amount of spraying, thereby providing highly efficient antistatic and alcohol repellent effects.The surface treatment device is characterized in that it does not require a separate drying facility because the small amount of spraying is sufficiently heated and evaporated by heated air within the DCD (die to collector distance) section.With such characteristics, the surface treatment device can be combined with the nonwoven fabric manufacturing process to composite nonwoven fabrics by continuous lamination.

[0060] As described above, the manufacturing method of the medical composite nonwoven fabric does not include a separate post-processing and drying step for removing the first liquid or the second liquid sprayed in each of the above-mentioned nonwoven fabric continuous surface treatment steps (S10-4, S20-4).

[0061] In addition, as described above, the first liquid or the second liquid sprayed continuously in each of the nonwoven fabric continuous surface treatment steps (S10-4, S20-4) can be continuously heated and evaporated by heated air in the DCD (die to collector distance) section of the composite nonwoven fabric manufacturing equipment.

[0062] The method for producing the medical composite nonwoven fabric may further include a step (S30) of continuously forming another spunbond nonwoven fabric layer on the meltblown nonwoven fabric layer in the same manner as the step (S10) of continuously forming the spunbond nonwoven fabric layer.

[0063] The method for producing a medical composite nonwoven fabric may further include, after the step of continuously forming the meltblown nonwoven fabric layer (S20) or the step of continuously forming another spunbonded nonwoven fabric layer (S30), a step of continuously heat-compressing the spunbonded nonwoven fabric layers to one or both sides of the meltblown nonwoven fabric layer (S40).

[0064] The first liquid or the second liquid sprayed continuously in each of the nonwoven fabric continuous surface treatment steps (S10-4, S20-4) is subjected to a drying process provided within the manufacturing process of the composite nonwoven fabric manufacturing apparatus.

[0065] The method for manufacturing a medical composite nonwoven fabric is not only mass-producible and reduces manufacturing costs, but also does not require separate antistatic and alcohol repellent treatments and drying processes as post-processes after the manufacture of the nonwoven fabric, and therefore can prevent a phenomenon in which the meltblown nonwoven fabric layer is stretched and damaged while exposed to a high drying temperature, as in the conventional technology that requires separate post-processing and drying processes, resulting in a decrease in water pressure resistance.

[0066] FIG. 1 is a schematic diagram illustrating a medical composite nonwoven fabric 10 according to an embodiment of the present invention. The medical composite nonwoven fabric 10 according to an embodiment of the present invention includes a first spunbond nonwoven fabric layer 11, a meltblown nonwoven fabric layer 12 and a second spunbond nonwoven fabric layer 13.

[0067] In addition, by modifying the manufacturing method of the medical composite nonwoven fabric, medical composite nonwoven fabrics having various structures and / or configurations can be manufactured. Another aspect of the present invention provides an article comprising the medical composite nonwoven fabric. The article may also be a surgical drape or gown.

[0068] The present invention will be described in more detail below with reference to examples. These examples are provided to more specifically explain the present invention, and the scope of the present invention is not limited to these examples.

[0069] Example 1: Production of medical composite nonwoven fabric Polypropylene with a melting factor (MFR) of 34g / 10 minutes was used as the main raw material for the spunbond nonwoven fabric, and 3% by weight of masterbatch chips with highly concentrated phthalocyanine blue were added to produce a blue color. The main raw material and masterbatch chips were melt-kneaded in an extruder and formed into filaments through a spinneret, then cooled with cooling air and stretched with air suctioned under the belt, forming a first spunbond nonwoven fabric layer and a second spunbond nonwoven fabric layer on a continuously driven conveyor belt. Polypropylene with a melting factor (MFR) of 1,100g / 10 minutes was used as the main raw material for the meltblown nonwoven fabric, and 3% by weight of masterbatch chips with highly concentrated phthalocyanine blue were added, as with the spunbond nonwoven fabric layer. The main raw material and masterbatch chips were melt-kneaded in an extruder and spun through a nozzle composed of multiple orifices, and then contacted with high-speed concentrated heated air sprayed from a side nozzle. In this way, the high-speed heated air stretched the polymer spun through the fine orifices, and the stretched polymer formed a microfiber-like meltblown nonwoven fabric layer consisting of fine threads of 1 to 5 μm. The meltblown nonwoven fabric layer had a density of 10 g / m 2 The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer were adjusted to have a basis weight of at least two layers, and finally, the total weight including the meltblown nonwoven fabric layer was adjusted to have a basis weight of 47 g / m 2A spunbond / meltblown / spunbond (SMS) multilayer nonwoven web was formed. Before forming the multilayer nonwoven web, each of the spunbond nonwoven layers and the meltblown nonwoven layers was continuously sprayed with a mixture of 25 parts by weight of an alcohol repellent perfluoroalkylethyl acrylate copolymer (concentration 30% by weight), 4 parts by weight of a nonionic compound (concentration 50% by weight) as an antistatic agent, and 2 parts by weight of an alcohol compound (concentration 70% by weight) as a penetrating agent for facilitating the penetration of the formulation into the nonwoven fabric, in water, to give alcohol repellency and antistatic properties, to treat the surface of each nonwoven fabric. The three nonwoven webs thus formed were heat-pressed under calendar conditions with an embossing roll temperature of 162°C, a plate roll temperature of 161°C, and a pressure of 90 N / mm to give shape stability. The resultant was then dried in a continuously moving hot air dryer at 130° C. to produce a medical composite nonwoven fabric having excellent alcohol repellency and antistatic properties.

[0070] Example 2: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was prepared in the same manner as in Example 1, except that the antistatic agent was not used during the surface treatment of the meltblown nonwoven fabric layer.

[0071] Example 3: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was prepared in the same manner as in Example 1, except that the alcohol repellent was not used during the surface treatment of the meltblown nonwoven fabric layer.

[0072] Example 4: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was prepared in the same manner as in Example 1, except that the alcohol repellent and antistatic agent were not used during the surface treatment of the meltblown nonwoven fabric layer.

[0073] Comparative Example 1: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was produced in the same manner as in Example 1, except that the alcohol repellent was omitted during the surface treatment of the second spunbond nonwoven fabric layer, and the alcohol repellent and antistatic agent were omitted during the surface treatment of the meltblown nonwoven fabric layer.

[0074] Comparative Example 2: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was produced in the same manner as in Example 1, except that the antistatic agent was omitted during the surface treatment of the second spunbond nonwoven fabric layer, and the alcohol repellent agent was omitted during the surface treatment of the meltblown nonwoven fabric layer.

[0075] Comparative Example 3: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was produced in the same manner as in Example 1, except that the alcohol repellent and antistatic agent were omitted during the surface treatment of the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer, and the antistatic agent was omitted during the surface treatment of the meltblown nonwoven fabric layer.

[0076] Comparative Example 4: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was produced in the same manner as in Example 1, except that the alcohol repellent and antistatic agent were omitted during the surface treatment of the first spunbond nonwoven fabric layer and the surface treatment of the second spunbond nonwoven fabric layer.

[0077] Comparative Example 5: Production of medical composite nonwoven fabric Using the method of Example 1, the total weight is 47 g / m 2A spunbond / meltblown / spunbond multi-layer nonwoven web was formed. In order to impart alcohol repellency and antistatic properties to the multi-layer nonwoven fabric thus formed, 25 parts by weight of an alcohol repellent perfluoroalkylethyl acrylate copolymer (concentration 30% by weight), 4 parts by weight of a nonionic antistatic agent (concentration 50% by weight), and 2 parts by weight of a penetrating agent (concentration 70% by weight) for facilitating the penetration of the formulation into the nonwoven fabric were mixed with 969 parts by weight of water, and the nonwoven fabric was immersed in a continuously supplied crude liquid bath, and the line pressure of the padder mangle was adjusted so that the wet pickup rate (= weight of the emulsion containing the solvent soaked in the nonwoven fabric / weight of the nonwoven fabric * 100) was 150% by weight. The resultant was dried at 36 sec / m in a continuously moving 135°C hot air dryer to produce a medical composite nonwoven fabric imparted with alcohol repellency and antistatic properties.

[0078] Comparative Example 6: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was prepared in the same manner as in Comparative Example 5, except that the antistatic agent was omitted during post-processing.

[0079] Comparative Example 7: Production of medical composite nonwoven fabric A medical composite nonwoven fabric was prepared in the same manner as in Comparative Example 5, except that the alcohol repellent was omitted during post-processing.

[0080] Evaluation example: Evaluation of the physical properties of medical composite nonwoven fabrics The water pressure resistance, alcohol repellency and surface resistance of the medical composite nonwoven fabrics produced in the above-mentioned Examples 1 to 4 and Comparative Examples 1 to 7 were evaluated by the following methods, and the results are shown in Table 1 below.

[0081] <Water pressure resistance evaluation> The water pressure resistance was measured by WSP (Worldwide Strategic Partners) 80.6 (09) using a water pressure resistance measuring device (Model FX-3000-4M (TEXTEST)). <Alcohol repellency evaluation> Alcohol repellency was measured by WSP 80.8(05). <Surface resistance evaluation> The surface resistance was measured using a surface resistance measuring device (Model R8340A (manufactured by ADVANTEST)) according to WSP 40.2(05).

[0082] [Table 1]

[0083] Referring to Table 1 above, the medical composite nonwoven fabrics manufactured in Examples 1 to 4 have high water pressure resistance (≧800 mmH2O) and alcohol repellency (≧9 grade) on both surfaces, and surface resistance (≦10 12 On the other hand, the medical composite nonwoven fabrics produced in Comparative Examples 1 to 7 have low water pressure resistance (<800 mmH2O), low alcohol repellency (<9 grade) on at least one surface, and / or low surface resistance (>10 12 Ω) is shown to be high.

[0084] Although the present invention has been described with reference to the drawings and embodiments, they are merely illustrative, and a person skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. Therefore, the true technical scope of the present invention is defined by the technical ideas of the claims.

Claims

1. A medical composite nonwoven fabric having antistatic properties and alcohol repellency, The medical composite nonwoven fabric includes a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer in that order; The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer each have antistatic properties and alcohol repellency, Water resistance measured by WSP 80.6 (09) is 700 mmH ２ O or higher, alcohol repellency measured by WSP 80.8 (05) is 8 or higher, and surface resistance measured by WSP 40.2 (05) is 10 １２ A medical composite nonwoven fabric with a hardness of less than Ω.

2. The medical composite nonwoven fabric according to claim 1 , wherein the meltblown nonwoven fabric layer has antistatic properties and alcohol repellency.

3. The medical composite nonwoven fabric according to claim 1 , wherein the meltblown nonwoven fabric layer does not have at least one of antistatic properties and alcohol repellency.

4. The medical composite nonwoven fabric of claim 1 , wherein the first spunbond nonwoven layer and the second spunbond nonwoven layer each include a plurality of spunbond nonwoven sub-layers.

5. The medical composite nonwoven fabric of claim 1 , wherein the meltblown nonwoven layer comprises a plurality of meltblown nonwoven sub-layers.

6. The medical composite nonwoven fabric of claim 1 , further comprising at least one additional layer.

7. Water pressure resistance measured by WSP 80.6 (09) is 800 mmH ２ O or higher, alcohol repellency measured by WSP 80.8 (05) is 9 or higher, and surface resistance measured by WSP 40.2 (05) is 10 １２ The medical composite nonwoven fabric according to claim 1, having a stiffness of Ω or less.

8. A method for producing a medical composite nonwoven fabric, comprising the steps of: A step of continuously forming a spunbond nonwoven fabric layer (S10); (S20) continuously forming a meltblown nonwoven fabric layer on the spunbond nonwoven fabric layer; After the step of continuously forming the meltblown nonwoven fabric layer (S20), the step of continuously heat-compressing each of the spunbond nonwoven fabric layers to one or both sides of the meltblown nonwoven fabric layer (S40), The step of continuously forming the spunbonded nonwoven fabric layer (S10) includes the steps of continuously forming free fibers using a nonconductive polymer (S10-1), continuously spinning the free fibers (S10-2), continuously accumulating the free fibers to continuously form a spunbonded nonwoven fabric (S10-3), and continuously spraying a first liquid containing an antistatic agent and an alcohol repellent agent onto the formed spunbonded nonwoven fabric to continuously surface treat the spunbonded nonwoven fabric (S10-4). The step of continuously forming the meltblown nonwoven fabric layer (S20) includes the steps of continuously forming free fibers using a nonconductive polymer (S20-1), continuously spinning the free fibers (S20-2), continuously accumulating the free fibers to continuously form a meltblown nonwoven fabric (S20-3), and continuously spraying a second liquid containing an alcohol repellent onto the formed meltblown nonwoven fabric to continuously surface-treat the meltblown nonwoven fabric (S20-4). The spunbond nonwoven continuous surface treatment step (S10-4) and the meltblown nonwoven continuous surface treatment step (S20-4) are performed by continuously spraying each of the liquids together with a gas, The spunbond nonwoven continuous surface treatment step (S10-4) and the meltblown nonwoven continuous surface treatment step (S20-4) are performed by using a surface treatment device configured to have antistatic and alcohol repellent effects by spraying a first liquid or a second liquid together with air onto a spunbond nonwoven layer or a meltblown nonwoven layer in a two-fluid form and contacting the liquid particles with the nonwoven web, and the surface treatment device is characterized in that a separate drying facility is not required because the liquid is heated and evaporated by heated air within a DCD (die to collector distance) section, The manufacturing method of the medical composite nonwoven fabric does not include a separate post-processing and drying process; A manufacturing method for medical composite nonwoven fabric.

9. 9. The method for producing a medical composite nonwoven fabric according to claim 8, further comprising the step of continuously forming another spunbond nonwoven fabric layer on the meltblown nonwoven fabric layer in the same manner as the step of continuously forming the spunbond nonwoven fabric layer (S10).

10. An article comprising the medical composite nonwoven fabric according to any one of claims 1 to 7.

11. The article of claim 10, wherein the article is a surgical drape or gown.

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