Medical composite nonwoven fabrics and their preparation methods, as well as articles

Abstract

A medical composite nonwoven fabric, its preparation method, and an article are disclosed. The disclosed composite nonwoven fabric has antistatic and alcohol-repellent properties.

Description

Technical Field

[0001] A medical composite nonwoven fabric, its preparation method, and articles are disclosed. More specifically, a medical composite nonwoven fabric with excellent water pressure resistance and alcohol repellency and low surface resistivity, a method for preparing said medical nonwoven fabric, and articles are disclosed. Background Technology

[0002] In the prior art, after the nonwoven fabric is prepared, the final nonwoven fabric is obtained by immersing the prepared nonwoven fabric in a liquid with antistatic and alcohol-repellent properties and then drying it.

[0003] However, when additional post-processing is performed as described above, the water pressure resistance required for medical nonwoven fabrics is reduced, and the manufacturing cost also increases. Summary of the Invention

[0004] Technical issues

[0005] One embodiment of the present invention provides a medical composite nonwoven fabric with excellent water pressure resistance and alcohol repellency and low surface resistance.

[0006] Another aspect of the present invention provides a method for preparing the medical spunbond nonwoven fabric.

[0007] Another aspect of the present invention provides an article comprising the composite nonwoven fabric.

[0008] Technical solution

[0009] One aspect of the present invention

[0010] A medical composite nonwoven fabric is provided, which has antistatic and alcohol-repellent properties.

[0011] The medical composite nonwoven fabric includes a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer, wherein the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer each have antistatic properties and alcohol repellency properties.

[0012] The meltblown nonwoven fabric layer can have antistatic and alcohol-repellent properties.

[0013] The meltblown nonwoven fabric layer may not have at least one of antistatic and alcohol-repellent properties.

[0014] The medical composite nonwoven fabric may sequentially include a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer.

[0015] The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include a plurality of spunbond nonwoven fabric sublayers.

[0016] The meltblown nonwoven fabric layer may include a plurality of meltblown nonwoven fabric sublayers.

[0017] The medical composite nonwoven fabric may further include at least one additional layer.

[0018] For the aforementioned medical composite nonwoven fabric, the water pressure resistance measured according to WSP 80.6(09) can be 700 mmH2O or greater, the alcohol repellency measured according to WSP 80.8(05) can be grade 8 or higher, and the surface resistivity measured according to WSP40.2(05) can be 10 Ω. 12 Ω or smaller.

[0019] For the aforementioned medical composite nonwoven fabric, the water pressure resistance measured according to WSP 80.6(09) can be 800 mmH2O or greater, the alcohol repellency measured according to WSP 80.8(05) can be grade 9 or higher, and the surface resistivity can be 10. 12 Ω or smaller.

[0020] Another aspect of the present invention includes:

[0021] The step of continuously forming spunbond nonwoven fabric (S10); and

[0022] In step (20), whereby a meltblown nonwoven layer is continuously formed on the spunbond nonwoven layer,

[0023] The step of continuously forming the spunbond nonwoven fabric layer (S10) includes a step of continuously forming free fibers using a non-conductive polymer (S10-1), a step of continuously spinning the free fibers (S10-2), a step of continuously forming the spunbond nonwoven fabric by continuously aggregating the free fibers (S10-3), and a step of continuously surface treating the formed spunbond nonwoven fabric by continuously spraying a first liquid containing an antistatic agent and an alcohol-repellent agent (S10-4).

[0024] The step of continuously forming the meltblown nonwoven fabric layer (S20) includes the step of continuously forming free fibers using a non-conductive polymer (S20-1), the step of continuously spinning the free fibers (S20-2), the step of continuously aggregating the free fibers to continuously form the meltblown nonwoven fabric (S20-3), and the step of continuously spraying the formed meltblown nonwoven fabric with a second liquid containing an alcohol-repellent agent to further treat the meltblown nonwoven fabric with a surface treatment (S20-4).

[0025] The steps of surface treatment of spunbond nonwoven fabric (S10-4) and continuous surface treatment of meltblown nonwoven fabric (S20-4) are performed by continuously spraying the first liquid and the second liquid with gas, respectively.

[0026] The method for preparing the medical composite nonwoven fabric may further include a step (S30) of continuously forming another spunbond nonwoven layer on the meltblown nonwoven fabric in the same manner as the step (S10) of continuously forming the spunbond nonwoven layer.

[0027] After the step of continuously forming the meltblown nonwoven fabric layer (S20) or the step of continuously forming another spunbond nonwoven fabric layer (S30), the method for preparing the medical composite nonwoven fabric may further include the step of continuously hot-pressing the spunbond nonwoven fabric layer and the other spunbond nonwoven fabric layer to one or both surfaces of the meltblown nonwoven fabric layer (S40).

[0028] The preparation method of the medical composite nonwoven fabric may not include additional subsequent processing and drying processes.

[0029] Another aspect of the present invention

[0030] An article comprising the aforementioned medical composite nonwoven fabric is provided.

[0031] The item may be a surgical drape or surgical gown.

[0032] Beneficial effects

[0033] The advantages of the composite nonwoven fabric according to an embodiment of the present invention are that it has excellent water pressure resistance, alcohol repellency and low surface resistance, and its preparation cost is also low. Attached Figure Description

[0034] Figure 1 The illustration is for illustrative purposes of a medical composite nonwoven fabric according to an embodiment of the present invention. Detailed Implementation

[0035] The following describes in detail a medical composite nonwoven fabric according to an embodiment of the present invention.

[0036] In this specification, "composite nonwoven fabric" refers to a nonwoven fabric made by continuously manufacturing two or more types of nonwoven fabrics in a single device and then bonding them together, rather than a nonwoven fabric laminate made by separately manufacturing two or more types of nonwoven fabrics and then performing a separate lamination process. Therefore, in this specification, "composite nonwoven fabric" can also be referred to as "monolithic nonwoven fabric". The medical composite nonwoven fabric is characterized by a stronger interlayer bond than the nonwoven fabric laminate, and superior morphological stability and filtration performance.

[0037] Furthermore, in this specification, the "spunbond nonwoven fabric layer with antistatic and alcohol-repellent properties" can be prepared by a continuous process. Specifically, the "spunbond nonwoven fabric layer with antistatic and alcohol-repellent properties" can be prepared by sequentially or simultaneously performing the "preparation of spunbond nonwoven fabric" and the "surface treatment for imparting antistatic and alcohol-repellent properties" in a continuous process.

[0038] Furthermore, in this specification, for "tensile strength", tensile strength in the mechanical direction was measured by stretching a 5cm wide specimen (grip interval of 10cm during evaluation) at a tensile speed of 500mm / min using a tensile testing machine (Instron) according to KSK0520.

[0039] Furthermore, in this specification, for "rigidity and softness", 16 mechanical and transverse test specimens (25mm × 150mm) were taken according to the test standard WSP 90.1. The test specimens were placed on the rigidity and softness tester and pushed in the inclined direction until the test specimens reached the inclined surface. The length of the test specimens from the bending point to the point of contact with the inclined surface was measured in mm.

[0040] Furthermore, in this specification, the "meltblown nonwoven fabric layer with alcohol repellency" can be prepared by a continuous process. Specifically, the "meltblown nonwoven fabric layer with alcohol repellency" can be a layer prepared by sequentially or simultaneously performing the "manufacturing of meltblown nonwoven fabric" and the "surface treatment for imparting alcohol repellency" in a continuous process.

[0041] Furthermore, in this specification, “water pressure resistance” is measured using a water pressure tester (manufacturer Textest Co., Ltd., model FX-3000-4M) according to Worldwide Strategic Partners (hereinafter referred to as “WSP”) 80.6(09).

[0042] Furthermore, in this specification, "having antistatic properties" means that the surface resistivity is 10 Ω as measured according to WSP 40.2(05). 15 Ω or smaller.

[0043] Furthermore, in this specification, “surface resistance” is measured using a surface resistance meter (manufacturer ADVANTEST, model R8340A) according to WSP 40.2(05).

[0044] Furthermore, in this specification, "having alcohol repellency" means that the alcohol repellency is grade 4 or higher as determined according to WSP 80.8(05).

[0045] The medical composite nonwoven fabric according to an embodiment of the present invention has antistatic and alcohol-repellent properties.

[0046] The medical composite nonwoven fabric may include a first spunbond nonwoven layer, a meltblown nonwoven layer, and a second spunbond nonwoven layer. Specifically, the medical composite nonwoven fabric may include a first spunbond nonwoven layer, a meltblown nonwoven layer, and a second spunbond nonwoven layer, which are prepared by a single apparatus through a continuous process and integrated into one piece.

[0047] The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer can respectively have antistatic properties and alcohol repellency.

[0048] Specifically, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may respectively include an antistatic agent and an alcohol repellent agent.

[0049] The antistatic agent may be hydrophobic.

[0050] Furthermore, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each further include a penetrating agent, which is used to promote the penetration of antistatic agent and alcohol repellent into the interior of the nonwoven fabric.

[0051] The penetrant improves the permeation performance of each of the first and second spunbond nonwoven layers by increasing the wettability of the antistatic agent and the alcohol repellent in each of the first and second spunbond nonwoven layers.

[0052] Furthermore, the penetrant may include alcohol compounds, hydroxy compounds, or combinations thereof.

[0053] For example, the first spunbond nonwoven layer and the second spunbond nonwoven layer may each comprise an antistatic / alcohol-repellent matrix mixture.

[0054] Antistatic agents are mainly classified into anionic, cationic, nonionic, and amphoteric types. Anionic and nonionic agents are widely used in antistatic processing. Cationic and amphoteric antistatic agents are rarely used as components in fiber spinning or textile emulsions, but they are used to ensure the softness of the final product. Anionic antistatic agents include sulfonate types (RSO3Na), sulfate ester types (ROSO3Na, ROSO3NH(CH2CH2OH)3Na, RO(CH2CH2O)SO3Na), and phosphate ester types. Phosphate ester antistatic agents are widely used, either alone or in mixtures with other auxiliaries, due to their excellent antistatic properties. Generally, in sulfated or phosphoric acid-esterified products, the number of carbon atoms in the aliphatic group, the degree of lactation, the degree of phosphorylation, and the position of the hydrophilic group in the molecular structure of the antistatic agent are highly correlated with its antistatic performance. Cationic antistatic agents are broadly classified into amine salt type (RNH2CH3COOH) and quaternary ammonium salt type (RCONHC3H6N(CH3)2CH2CH2OH)X (X = NO3, ClO4)). Due to their excellent antistatic properties, compatibility, and softness, they are widely used in post-processing. However, because they contain nitrogen in their molecules, they may cause discoloration due to oxidation, chlorine loss due to chlorine bleaching, and problems related to metal ion contamination and adsorption. Therefore, caution is required during use. Nonionic antistatic agents generally have lower adsorption to fibers and excellent smoothness, thus exhibiting uniform wetting of synthetic fibers. They are classified into polyoxyethylene fatty acid ester type (R-COO(CH2CH2O)). n H), Polyoxyethylene alkyl ether type (RO(CH2CH2O) nNonionic antistatic agents include H), polyoxyethylene alkylphenol ether type, and polyoxyethylene alkylamine type. These nonionic antistatic agents are commonly used in spinning emulsions for synthetic fibers. Amphoteric antistatic agents, containing both cationic and anionic polar groups within the same molecule, are characterized by excellent cationic properties and tactile feel, and less chloride loss. Amphoteric antistatic agents include betaine type and imidazoline type; betaine type is generally widely used. Durable antistatic agents require excellent softness or heat resistance, no change over time, compatibility with resin processing agents and water-repellent and oil-repellent agents without reducing color fastness, and continuous dust absorption. Durable antistatic agents are typically cationic polymers or electrolyte polymers with strong absorption properties, such as polyacrylic acid derivatives, polyethyleneamine derivatives, polyamide derivatives, and cationic resins, with polyacrylic acid derivatives with cationic side chains being representative examples. Methods for treating fibers with durable antistatic agents include methods for forming complexes on fibers by treating fibers with poly(β-methacryloyloxyethyl dimethyl ethyl metasulfate) ammonium sulfate followed by post-treatment with an anionic surfactant; methods for treating the complexes dispersed with a nonionic surfactant; methods for treating fibers by combining a polyamine containing polyoxyethylene with a crosslinking agent; and methods for forming an insoluble three-dimensional network structure on the fiber surface by heat treatment.

[0055] The alcohol repellent may include perfluoroalkyl materials, polyfluoroalkyl materials, or combinations thereof.

[0056] The perfluoroalkyl material may include perfluoroalkyl acid (PFAA).

[0057] The perfluoroalkyl acid may include perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), or a combination thereof.

[0058] As an example, the meltblown nonwoven fabric layer may have antistatic and alcohol-repellent properties.

[0059] Specifically, the meltblown nonwoven fabric layer may include an antistatic agent and an alcohol repellent.

[0060] Furthermore, the antistatic agent and the alcohol repellent included in the meltblown nonwoven fabric layer may be the same as the antistatic agent and alcohol repellent included in the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer, respectively.

[0061] According to another example, the meltblown nonwoven layer may not have at least one of antistatic and alcohol-repellent properties.

[0062] The medical composite nonwoven fabric may sequentially include a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer. 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 other orders.

[0063] The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include a plurality of spunbond nonwoven fabric sublayers. Specifically, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include a plurality of spunbond nonwoven fabric sublayers, which are manufactured by a single apparatus through a continuous process and integrated into one unit.

[0064] The meltblown nonwoven fabric layer may include a plurality of meltblown nonwoven fabric sub-layers. Specifically, the meltblown nonwoven fabric layer may include a plurality of meltblown nonwoven fabric sub-layers, which are respectively prepared by a device through a continuous process and then integrated into one.

[0065] At least one spunbond nonwoven fabric and at least one meltblown nonwoven fabric included in the medical composite nonwoven fabric may each independently include a non-conductive polymer.

[0066] The non-conductive polymer may include polyolefins, polystyrene, polycarbonate, polyester, polyamide, copolymers thereof, or combinations thereof.

[0067] The polyolefin may include polyethylene, polypropylene, poly-4-methyl-1-pentene, polyvinyl chloride, or combinations thereof.

[0068] The polyester may include polyethylene terephthalate, polylactic acid, or a combination thereof.

[0069] In the aforementioned medical composite nonwoven fabric, based on 100 parts by weight of the total weight of the composite nonwoven fabric, the total content of meltblown nonwoven fabric can be from 3 parts by weight to 50 parts by weight. When the total content of the spunbond nonwoven fabric is within this range, a composite nonwoven fabric with excellent morphological stability and durability can be obtained.

[0070] The basis weight (mass per unit area) of the medical composite nonwoven fabric can be 10 g / m². 2 Up to 500g / m 2 For example, 20g / m 2 Up to 100g / m 2 .

[0071] The plurality of nonwoven fabrics included in the medical composite nonwoven fabric can be thermally melted into one piece (i.e., bonded) rather than being melted into one piece by ultrasound.

[0072] The medical composite nonwoven fabric may further include at least one additional layer.

[0073] As an example, each of the additional layers may include one or more additional nonwoven fabrics that are neither spunbond nonwovens nor meltblown nonwovens.

[0074] As another example, each of the additional layers may include one or more layers that include other textures that are not nonwoven fabrics.

[0075] The mechanical tensile strength of the medical composite nonwoven fabric can be 0.1 to 0.3 kgf / 5cm / gsm, 0.15 to 0.3 kgf / 5cm / gsm, 0.20 to 0.3 kgf / 5cm / gsm, or 0.25 to 0.30 kgf / 5cm / gsm. Here, gsm is g / m². 2 The abbreviation for "composite nonwoven fabric" refers to the weight per unit area of ​​the composite nonwoven fabric.

[0076] In addition, the stiffness or softness of the medical composite nonwoven fabric in the mechanical direction can be 20 mm or more, 25 mm or more, 30 mm or more, or 35 mm or more.

[0077] Furthermore, the transverse stiffness of the medical composite nonwoven fabric can be 10mm or greater, 15mm or greater, 20mm or greater, 25mm or greater, or 30mm or greater.

[0078] The water pressure resistance of the medical composite nonwoven fabric, as determined by WSP 80.6(09), can be 700 mmH2O or greater, 720 mmH2O or greater, 740 mmH2O or greater, 760 mmH2O or greater, 780 mmH2O or greater, 800 mmH2O or greater, 820 mmH2O or greater, 840 mmH2O or greater, 860 mmH2O or greater, 880 mmH2O or greater, or 900 mmH2O or greater.

[0079] Furthermore, the alcohol repellency of the medical composite nonwoven fabric, as determined according to WSP 80.8(05), can be grade 8 or higher, or grade 9 or higher.

[0080] Furthermore, the surface resistivity of the medical composite nonwoven fabric, as measured according to WSP 40.2(05), can be 10 Ω·cm. 12 Ω or smaller, 10 11 Ω or smaller, 10 10 Ω or smaller, 10 9 Ω or smaller, or 10 8 Ω or smaller.

[0081] The inventors initially developed a method for preparing a nonwoven fabric with the following specific composition, thereby producing a medical composite nonwoven fabric having a water pressure resistance of 800 mmH2O or greater as determined by WSP 80.6(09), an alcohol repellency of grade 9 or higher as determined by WSP 80.8(05), and a surface resistivity of 10. 12 Ω or smaller.

[0082] The preparation method of a medical composite nonwoven fabric according to an embodiment of the present invention will be described in detail below.

[0083] A method for preparing 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).

[0084] The step (S10) of continuously forming spunbond nonwoven fabric layers may refer to the process of melting, extruding, cooling and stretching a thermoplastic non-conductive polymer to form fiber filaments, and then stacking the fiber filaments on a mesh belt to perform web forming.

[0085] Specifically, the step of continuously forming the spunbond nonwoven fabric layer (S10) may include the step of continuously forming free fibers using a non-conductive polymer (S10-1), the step of continuously spinning the free fibers (S10-2), the step of continuously forming the spunbond nonwoven fabric by continuously aggregating the free fibers (S10-3), and the step of continuously surface treating the formed spunbond nonwoven fabric by continuously spraying a first liquid containing an antistatic agent and an alcohol repellent (S10-4).

[0086] The step of continuously surface treating the spunbond nonwoven fabric (S10-4) can be performed by continuously spraying the first liquid together with a gas (e.g., air).

[0087] The first liquid may be prepared by adding the antistatic agent and the alcohol repellent to a solvent (e.g., water).

[0088] Furthermore, in addition to the antistatic agent and the alcohol repellent, the first liquid may further include the aforementioned penetrant.

[0089] The first liquid can be a solution or a suspension.

[0090] The step (S20) of continuously forming the meltblown nonwoven fabric layer may refer to forming fiber filaments by melting and extruding a thermoplastic non-conductive polymer, hot air stretching and cooling it, and then laminating the fiber filaments onto the web-formed spunbond nonwoven fabric in the step (S10) of continuously forming the spunbond nonwoven fabric layer.

[0091] Specifically, the step of continuously forming the meltblown nonwoven fabric layer (S20) may include the step of continuously forming free fibers using a non-conductive polymer (S20-1), the step of continuously spinning the free fibers (S20-2), the step of continuously aggregating the free fibers to continuously form the meltblown nonwoven fabric (S20-3), and the step of continuously spraying the formed meltblown nonwoven fabric with a second liquid containing an antistatic agent and / or an alcohol repellent to continuously surface treat the meltblown nonwoven fabric (S20-4).

[0092] The step of continuously surface treating the meltblown nonwoven fabric (S20-4) can be performed by continuously spraying a second liquid together with a gas (e.g., air).

[0093] The second liquid may be prepared by adding the antistatic agent and / or the alcohol repellent to a solvent (e.g., water).

[0094] Furthermore, in addition to the antistatic agent and the alcohol repellent, the second liquid may further include the aforementioned penetrant.

[0095] The second liquid can be a solution or a suspension.

[0096] Furthermore, step (S20) may exclude step (S20-4).

[0097] The inventors have developed a surface treatment apparatus to spray a first or second liquid, in a dual-fluid form, along with air, onto a spunbond or meltblown nonwoven fabric layer. This allows liquid particles with sufficient kinetic energy, generated with a small spray volume, to contact the nonwoven fabric web, resulting in high antistatic and alcohol-repellent effects. This surface treatment is characterized by the elimination of the need for additional drying equipment, as the spray volume is small and the air is sufficiently heated and evaporated within the DCD (Die to collector distance) range. Due to this feature, the surface treatment apparatus is characterized by combining the nonwoven fabric with a nonwoven fabric manufacturing process and continuously layering the nonwoven fabric.

[0098] As described above, the method for preparing the medical composite nonwoven fabric may not include additional subsequent processing or drying processes to remove the first or second liquid sprayed in the steps (S10-4, S20-4) of continuously surface treating the nonwoven fabric.

[0099] Furthermore, as described above, the first or second liquid continuously sprayed in the nonwoven fabric continuous surface treatment step (S10-4, S20-4) can be continuously heated and evaporated by air heated within the DCD (Die to collector distance) range of the composite nonwoven fabric preparation apparatus.

[0100] The method for preparing the medical composite nonwoven fabric may further include a step (S30) of continuously forming another spunbond nonwoven layer on the meltblown nonwoven fabric in the same manner as the step (S10) of continuously forming the spunbond nonwoven fabric.

[0101] After the step of continuously forming the meltblown nonwoven fabric layer (S20) or the step of continuously forming another spunbond nonwoven fabric layer (S30), the method for preparing the medical composite nonwoven fabric may further include the step of continuously hot-pressing the spunbond nonwoven fabric layer and the other spunbond nonwoven fabric layer to one or both surfaces of the meltblown nonwoven fabric layer (S40).

[0102] In the continuous surface treatment step (S10-4, S20-4) of the nonwoven fabric, the first or second liquid continuously sprayed can be dried in the preparation process performed by the composite nonwoven fabric preparation device.

[0103] According to the preparation method of the medical composite nonwoven fabric, mass production can be achieved while saving preparation costs. It does not include additional antistatic, alcohol-repellent treatment and drying processes as subsequent processes after the preparation of nonwoven fabric. Therefore, it can prevent the phenomenon that meltblown nonwoven fabric layers are stretched and damaged when exposed to high drying temperature, resulting in reduced water pressure resistance, as is the case in the prior art with additional subsequent processing and drying processes.

[0104] Figure 1 The diagram illustrates a medical composite nonwoven fabric 10 according to an embodiment of the present invention.

[0105] According to an embodiment of the present invention, a medical composite nonwoven fabric 10 includes a first spunbond nonwoven fabric layer 11, a meltblown nonwoven fabric layer 12, and a second spunbond nonwoven fabric layer 13.

[0106] Furthermore, medical composite nonwoven fabrics with various structures and / or compositions can be prepared by modifying the preparation method of the medical composite nonwoven fabric.

[0107] Another aspect of the present invention provides an article comprising the aforementioned medical composite nonwoven fabric.

[0108] The item may be a surgical drape or surgical gown.

[0109] The present invention will be described in more detail below with reference to embodiments. These embodiments are merely for the purpose of describing the invention more specifically, and the scope of the invention is not limited to these embodiments.

[0110] Example 1: Preparation of medical composite nonwoven fabric

[0111] Polypropylene with a melt flow rate (MFR) of 34 g / 10 min was used as the main raw material for preparing spunbond nonwoven fabric, and a matrix mixture sheet comprising a high concentration of phthalocyanine blue was added at 3% by weight to express the blue color. The regularly supplied main raw material and matrix mixture sheet were melt-kneaded in an extruder, filaments were formed through a spinneret, cooled with cooling air, and stretched using adsorbed air below the belt, forming a first and second spunbond nonwoven fabric layer on a continuously driven conveyor belt. Polypropylene with a melt flow rate (MFR) of 1100 g / 10 min was used as the main raw material for preparing meltblown nonwoven fabric, and, as for the spunbond nonwoven fabric layer, a matrix mixture sheet comprising a high concentration of phthalocyanine blue was added at 3% by weight. The main raw material and matrix mixture sheet, supplied in fixed quantities, were melt-kneaded in an extruder and spun through a spinneret formed by multiple cavities, and the main raw material and matrix mixture sheet were contacted with high-speed, concentrated, and heated air ejected from side nozzles. This high-rate heating air stretches polymers spun through tiny cavities, forming microfiber-like meltblown nonwoven layers composed of filaments with a fine thickness of 1 μm to 5 μm. The meltblown nonwoven layers are adjusted to have a density of 10 g / m². 2 The basis weight. Furthermore, the first and second spunbond nonwoven layers are configured as a single unit, comprising at least two layers, ultimately forming a spunbond / meltblown / spunbond (SMS) multilayer nonwoven web with a total weight including the meltblown nonwoven layer of 47 g / m². 2 Furthermore, prior to forming the multilayer nonwoven web, each of the nonwoven fabrics was surface-treated by continuously spraying a mixture to impart alcohol-repellent and antistatic properties to the first and second spunbond nonwoven layers and the meltblown nonwoven layer. The mixture was prepared by mixing the following with 969 parts by weight of water: 25 parts by weight of a perfluoroalkyl ethyl acrylate copolymer (30% by weight) as an alcohol-repellent, 4 parts by weight of a nonionic compound (50% by weight) as an antistatic agent, and 2 parts by weight of an alcohol compound (70% by weight), which acts as a penetrant to promote the penetration of the auxiliaries into the nonwoven fabric. The three nonwoven webs formed in this manner were hot-pressed under Calendar conditions of 162°C printing roller temperature, 161°C plate roller temperature, and 90 N / mm pressure to impart morphological stability. The resulting material was then dried in a continuously moving 130°C hot air dryer to prepare a medical composite nonwoven fabric with excellent alcohol-repellent and antistatic properties.

[0112] Example 2: Preparation of medical composite nonwoven fabric

[0113] Except for excluding the antistatic agent during the surface treatment of the meltblown nonwoven fabric layer, a medical composite nonwoven fabric was prepared according to the same method as described in Example 1.

[0114] Example 3: Preparation of medical composite nonwoven fabric

[0115] Except for excluding alcohol-repellent agents during surface treatment of the meltblown nonwoven fabric layer, a medical composite nonwoven fabric was prepared according to the same method as described in Example 1.

[0116] Example 4: Preparation of medical composite nonwoven fabric

[0117] Except for excluding alcohol-repellent and antistatic agents during the surface treatment of the meltblown nonwoven fabric layer, a medical composite nonwoven fabric was prepared according to the same method as in Example 1.

[0118] Comparative Example 1: Preparation of Medical Composite Nonwoven Fabric

[0119] Except for removing the alcohol repellent during the surface treatment of the second spunbond nonwoven layer and removing the alcohol repellent and antistatic agent during the surface treatment of the meltblown nonwoven layer, a medical composite nonwoven fabric was prepared according to the same method as in Example 1.

[0120] Comparative Example 2: Preparation of medical composite nonwoven fabric.

[0121] Except for excluding the antistatic agent during the surface treatment of the second spunbond nonwoven layer and the alcohol-repellent agent during the surface treatment of the meltblown nonwoven layer, a medical composite nonwoven fabric was prepared according to the same method as in Example 1.

[0122] Comparative Example 3: Preparation of Medical Composite Nonwoven Fabric

[0123] Except that alcohol-repellent agents and antistatic agents were excluded during the surface treatment of the first spunbond nonwoven layer and the second spunbond nonwoven layer, and antistatic agents were excluded during the surface treatment of the meltblown nonwoven layer, a medical composite nonwoven fabric was prepared according to the same method as in Example 1.

[0124] Comparative Example 4: Preparation of Medical Composite Nonwoven Fabric

[0125] Except for excluding alcohol-repellent agents and antistatic agents during the surface treatment of the first spunbond nonwoven layer and the second spunbond nonwoven layer, a medical composite nonwoven fabric was prepared according to the same method as in Example 1.

[0126] Comparative Example 5: Preparation of Medical Spunbond Nonwoven Fabric

[0127] A spunbond / meltblown / spunbond multilayer nonwoven web was formed according to the method in Example 1, with a total weight of 47 g / m. 2 To impart alcohol-repellent and antistatic properties to the multilayer nonwoven fabric formed in this manner, as a subsequent processing step, a crude solution was prepared by mixing 25 parts by weight of a perfluoroalkyl ethyl acrylate copolymer (30% by weight) as an alcohol-repellent agent, 4 parts by weight of a nonionic antistatic agent (50% by weight), and a penetrant (70% by weight) for promoting the penetration of auxiliaries into the nonwoven fabric with 969 parts by weight of water. The nonwoven fabric was then immersed in a bath continuously supplied with this crude solution, and the linear pressure of the Padder mangle was adjusted to achieve a liquid absorption rate (= weight of solvent-containing emulsion adhering to the nonwoven fabric / weight of nonwoven fabric * 100) of 150% by weight. The resulting product was dried in a continuously moving 135°C hot air dryer at a speed of 36 sec / m to prepare a medical composite nonwoven fabric with alcohol-repellent and antistatic properties.

[0128] Comparative Example 6: Preparation of Medical Composite Nonwoven Fabric

[0129] Except for excluding the antistatic agent during subsequent processing, a medical composite nonwoven fabric was prepared according to the same method as Comparative Example 5.

[0130] Comparative Example 7: Preparation of Medical Composite Nonwoven Fabric

[0131] Except for excluding alcohol-repellent agents during post-processing, a medical composite nonwoven fabric was prepared according to the same method as in Comparative Example 5.

[0132] Evaluation Example: Physical Property Evaluation of Medical Composite Nonwoven Fabrics

[0133] The water pressure resistance, alcohol repellency and surface resistivity of the medical composite nonwoven fabrics prepared in Examples 1 to 4 and Comparative Examples 1 to 7 were evaluated according to the following method, and the results are shown in Table 1 below.

[0134] <Water Pressure Resistance Assessment>

[0135] According to Worldwide Strategic Partners (hereinafter referred to as "WSP") 80.6(09), water pressure resistance was determined using a water pressure tester (manufacturer TEXTEST Co., Ltd., model FX-3000-4M).

[0136] <Alcohol Rejection Assessment>

[0137] Alcohol rejection was determined according to WSP 80.8(05).

[0138] <Surface Resistance Evaluation>

[0139] The surface resistance was measured using a surface resistance meter (manufacturer ADVANTEST, model R8340A) according to WSP 40.2(05).

[0140] [Table 1]

[0141]

[0142]

[0143] According to Table 1, the medical composite nonwoven fabrics prepared in Examples 1 to 4 exhibit high water pressure resistance (≥800 mmH2O) and alcohol repellency (≥9 grade) on both sides, and low surface resistivity (≤10). 12 The surface resistance (Ω) is lower. Conversely, for the medical composite nonwoven fabrics prepared in Comparative Examples 1 to 7, the water pressure resistance (<800 mmH2O), the alcohol repellency (<9 grade) of at least one surface, and / or the surface resistivity (>10 Ω) of at least one surface are lower. 12 (Ω) is relatively high.

[0144] Although the invention has been described with reference to the accompanying drawings and embodiments, such description is merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments can be made based on it. Therefore, the true scope of protection of the invention should be determined by the technical concept of the appended claims.

Claims

1. A medical composite nonwoven fabric having antistatic and alcohol-repellent properties, The medical composite nonwoven fabric sequentially comprises 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 respectively possess antistatic and alcohol-repellent properties, wherein... According to WSP 80.6 (09), the water pressure resistance is 700 mmH2O or greater; according to WSP 80.8 (05), the alcohol repellency is grade 8 or higher; and according to WSP 40.2 (05), the surface resistivity is 10. 12 Ω or smaller The feature is that the surface treatment of the first and second spunbond nonwoven fabric layers and the meltblown nonwoven fabric layer is performed by continuously spraying a first liquid or a second liquid together with a gas. The surface treatment is performed using a surface treatment device configured to spray a first or second liquid in a dual-fluid form with air onto each layer so that liquid particles with sufficient kinetic energy in a small spray volume contact the nonwoven fabric to achieve high antistatic and alcohol-repellent effects. The surface treatment device is configured to evaporate the liquid by air heated within the DCD (Die to collector distance) range, thereby achieving high antistatic and alcohol-repellent effects without the need for additional drying equipment.

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

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 according to claim 1, wherein, The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer each include a plurality of spunbond nonwoven fabric sublayers.

5. The medical composite nonwoven fabric according to claim 1, wherein, The meltblown nonwoven fabric layer comprises a plurality of meltblown nonwoven fabric sublayers.

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

7. The medical composite nonwoven fabric according to claim 1, in, According to WSP 80.6 (09), the water pressure resistance is 800 mmH2O or greater; according to WSP 80.8 (05), the alcohol repellency is grade 9 or higher; and the surface resistivity is 10. 12 Ω or smaller.

8. A method for preparing a medical composite nonwoven fabric, comprising: Step of continuously forming spunbond nonwoven fabric layers (S10); The step of continuously forming a meltblown nonwoven layer on the spunbond nonwoven layer (S20), and After the step of continuously forming the meltblown nonwoven fabric layer (S20), the step of continuously hot-pressing the spunbond nonwoven fabric layer and the other spunbond nonwoven fabric layer to one or both surfaces of the meltblown nonwoven fabric layer (S40), wherein, The step of continuously forming the spunbond nonwoven fabric layer (S10) includes a step of continuously forming free fibers using a non-conductive polymer (S10-1), a step of continuously spinning the free fibers (S10-2), a step of continuously forming the spunbond nonwoven fabric by continuously aggregating the free fibers (S10-3), and a step of continuously surface treating the formed spunbond nonwoven fabric by continuously spraying a first liquid containing an antistatic agent and an alcohol-repellent agent (S10-4). The step of continuously forming the meltblown nonwoven fabric layer (S20) includes the step of continuously forming free fibers using a non-conductive polymer (S20-1), the step of continuously spinning the free fibers (S20-2), the step of continuously aggregating the free fibers to continuously form the meltblown nonwoven fabric (S20-3), and the step of continuously spraying the formed meltblown nonwoven fabric with a second liquid containing an alcohol-repellent agent to further surface treat the meltblown nonwoven fabric (S20-4). The steps of surface treatment of spunbond nonwoven fabric (S10-4) and continuous surface treatment of meltblown nonwoven fabric (S20-4) are performed by continuously spraying the first liquid and the second liquid with gas, respectively. The steps of continuously surface treating the spunbond nonwoven fabric (S10-4) and the continuous surface treating the meltblown nonwoven fabric (S20-4) are performed using a surface treatment device. This device is configured to spray either a first or a second liquid, in a dual-fluid form, along with air, onto the spunbond or meltblown nonwoven fabric layer. This allows liquid particles with sufficient kinetic energy, applied in a small spray volume, to contact the nonwoven fabric web, achieving high antistatic and alcohol-repellent effects. A key feature of this surface treatment device is that it eliminates the need for additional drying equipment, as the spray volume is small and the air heated within the DCD (Die to collector distance) range is sufficient for heating and evaporation. The method for preparing the medical composite nonwoven fabric does not include additional subsequent processing and drying processes.

9. The preparation method according to claim 8, further comprising a step (S30) of continuously forming another spunbond nonwoven layer on the meltblown nonwoven layer in the same manner as the step (S10) of continuously forming the spunbond nonwoven layer.

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

11. The article according to claim 10, wherein, The item in question is a surgical drape or surgical gown.

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