WO2021206320A1 - Non-woven medical composite fabric, method for producing same, and products comprising same - Google Patents

Abstract

Disclosed are non-woven medical composite fabric, a method for producing same, and products comprising same. Disclosed non-woven composite fabric is anti-static and alcohol-repellent.

Description

Medical composite nonwoven fabric, manufacturing method thereof, and article

Disclosed are a composite nonwoven fabric for medical use, a method for manufacturing the same, and an article. More specifically, a medical composite nonwoven fabric having excellent water pressure resistance and alcohol repellency and low surface resistance, a manufacturing method thereof, and an article are disclosed.

Conventionally, after preparing a nonwoven fabric, the final nonwoven fabric was obtained by immersing the prepared nonwoven fabric in an antistatic and alcohol repelling liquid and then drying the nonwoven fabric.

However, when a separate post-processing treatment is performed as described above, there is a problem that not only the water pressure resistance required for the medical nonwoven fabric is reduced, but also the manufacturing cost is increased.

One 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 manufacturing the medical composite nonwoven fabric.

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

One aspect of the present invention is

To provide a medical composite nonwoven fabric having antistatic properties and alcohol repellency.

The medical composite nonwoven fabric includes a first spunbonded nonwoven fabric layer, a meltblown nonwoven fabric layer and a second spunbonded nonwoven fabric layer, and the first spunbonded nonwoven fabric layer and the second spunbonded nonwoven fabric layer are antistatic properties and alcohol may have repulsion.

The melt blown nonwoven fabric layer may have antistatic properties and alcohol repellency.

The melt blown nonwoven fabric layer may not have at least one of antistatic properties and alcohol repellency properties.

The medical composite nonwoven fabric may include the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbond nonwoven fabric layer in this order.

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

The melt-blown non-woven fabric layer may include a plurality of melt-blown non-woven sub-layers.

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

The medical composite nonwoven fabric has a water pressure resistance of 700 mmH ₂ O or more measured according to WSP 80.6 (09), an alcohol repellency measured according to WSP 80.8 (05) of 8 or more, and a surface measured according to WSP 40.2 (05) The resistance ^{can be 10 12} Ω or less.

The medical composite nonwoven fabric has a water pressure of 800 mmH ₂ O or more measured according to WSP 80.6 (09), alcohol repellency measured according to WSP 80.8 (05) of 9 or more, and a surface resistance of 10 ¹² Ω or less.

Another aspect of the present invention is

Continuously forming a spunbond nonwoven layer (S10); and

Continuously forming a melt blown nonwoven fabric layer on the spunbond nonwoven fabric layer (S20),

The continuous forming of the spunbond nonwoven layer (S10) includes continuously forming free fibers with a non-conductive polymer (S10-1), continuously spinning the free fibers (S10-2), and continuously forming the free fibers (S10-2). Continuously forming a spunbond nonwoven fabric by integrating with a (S10-3) and continuously spraying a first liquid containing an antistatic agent and an alcohol repellent agent to the formed spunbond nonwoven fabric to continuously surface-treat the spunbond nonwoven fabric (S10-4),

The continuous formation of the melt blown nonwoven layer (S20) includes the steps of continuously forming free fibers with a non-conductive polymer (S20-1), continuously spinning the free fibers (S20-2), and forming the free fibers Continuously accumulating to continuously form a melt blown nonwoven fabric (S20-3) and continuously spraying a second liquid containing an alcohol repellent agent to the formed melt blown nonwoven fabric to continuously surface-treat the melt blown nonwoven fabric It provides a method of manufacturing a medical composite nonwoven including the step (S20-4).

The continuous surface treatment of the spunbond nonwoven fabric (S10-4) and the continuous surface treatment of the melt blown nonwoven fabric (S20-4) may be performed by continuously spraying each liquid together with a gas.

The manufacturing method of the medical composite nonwoven fabric may further include a step (S30) of continuously forming another spunbond nonwoven fabric layer on the melt blown nonwoven fabric layer in the same manner as the continuous forming step (S10) of the spunbonded nonwoven fabric layer. have.

The manufacturing method of the medical composite nonwoven fabric is performed on one or both sides of the melt blown nonwoven fabric layer after the continuous formation of the melt blown nonwoven layer (S20) or the continuous formation of the spunbond nonwoven layer (S30). The step of continuously thermocompressing the bond nonwoven layer (S40) may be further included.

The manufacturing method of the medical composite nonwoven fabric may not include a separate post-processing and drying process.

Another aspect of the present invention is

It provides an article comprising the medical composite nonwoven fabric.

The article may be a surgical cloth or a surgical gown.

The composite nonwoven fabric according to an embodiment of the present invention has advantages of excellent water pressure resistance and alcohol repellency, low surface resistance, and low manufacturing cost.

1 is a diagram schematically showing a medical composite nonwoven fabric according to an embodiment of the present invention.

Hereinafter, a medical composite nonwoven fabric according to an embodiment of the present invention will be described in detail.

In the present specification, "non-woven fabric composite" is not a non-woven fabric laminate manufactured through a separate lamination (lamination) post-process after two or more kinds of non-woven fabrics are individually prepared, but two or more kinds of non-woven fabrics are one It means a nonwoven fabric that is manufactured in a continuous process in each device and integrated with each other. Therefore, in this specification, "composite non-woven fabric" may also be referred to as "monolithic non-woven fabric". The medical composite nonwoven fabric has a strong interlayer bond compared to the nonwoven fabric laminate, and has excellent shape stability and filtration performance.

In addition, in the present specification, "spunbond nonwoven fabric layer having antistatic property and alcohol repellency" may be manufactured by a continuous process. Specifically, "spunbond nonwoven fabric layer having antistatic property and alcohol repellency" is a continuous process that "preparation of spunbond nonwoven fabric" and "surface treatment for imparting antistatic property and alcohol repellency" are sequentially or simultaneously performed It may be manufactured by

In addition, in this specification, "tensile strength" refers to a test piece with a width of 5 cm (grip interval of 10 cm during evaluation) with a tensile speed of 500 mm/min through a tensile strength elongator (Instron) according to KSK 0520. The tensile strength in the mechanical direction was measured, respectively.

In addition, in this specification, "strength" refers to 16 samples (25 mm × 150 mm) in MD and CD directions according to the measurement standard WSP 90.1, placed on the stiffness measuring machine, and when the specimen touches the inclined surface in the inclined direction. The length of the sample from the point of bending to the point of contact with the inclined surface was measured in mm.

Also, in the present specification, the "melt-blown nonwoven fabric layer having alcohol repellency" may be manufactured by a continuous process. Specifically, the "melt blown nonwoven fabric layer having alcohol repellency" may be manufactured by sequentially or simultaneously performing "preparation of melt blown nonwoven fabric" and "surface treatment for imparting alcohol repellency" in a continuous process. .

In addition, in this specification, "water pressure resistance" is measured using a water pressure measurement device (manufacturer TEXTEST, model name FX-3000-4M) according to Worldwide Strategic Partners (hereinafter referred to as "WSP") 80.6 (09).

In addition, in this specification, "having antistatic property" means that the surface resistance measured according to WSP 40.2 (05) is 10 ¹⁵ Ω or less.

In addition, in this specification, "surface resistance" is measured using a surface resistance measuring device (manufacturer ADVANTEST, model name: R8340A) according to WSP 40.2 (05).

In addition, in this specification, "having alcohol repellency" means that the alcohol repellency measured according to WSP 80.8(05) is 4 or more grades.

Medical composite nonwoven fabric according to an embodiment of the present invention has antistatic properties and alcohol repellency.

The medical composite nonwoven fabric may include a first spunbonded nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbonded nonwoven fabric layer. Specifically, the medical composite nonwoven fabric may include a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer and a second spunbond nonwoven fabric layer that are each manufactured in a continuous process in one device and integrated with each other.

The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may have antistatic properties and alcohol repellency, respectively.

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

The antistatic agent may be hydrophobic.

In addition, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may further include a penetrating agent for facilitating penetration of an antistatic agent and an alcohol repellent agent into the nonwoven fabric, respectively.

The penetrant 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, thereby improving the penetration performance into each of the spunbond nonwoven fabric layers.

In addition, the penetrant may include an alcohol-based compound, a hydroxy-based compound, or a combination thereof.

For example, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include an antistatic/alcohol repellent masterbatch.

The antistatic agent is mainly classified into anion-based, cation-based, nonionic and amphoteric, and among them, anionic and nonionic are widely used for antistatic processing. In general, cationic and amphoteric systems are rarely used as components of fiber spinning and spinning emulsions, but are used as antistatic agents to ensure flexibility of the final product. As anionic type, sulfonate type (RSO ₃ Na), sulfate ester salt type (ROSO ₃ Na, ROSO ₃ NH(CH ₂ CH ₂ OH) ₃ Na, RO(CH ₂ CH ₂ O)SO ₃ Na), phosphate ester salt type, etc. In addition, the phosphate ester salt type has good antistatic properties, so it is widely used alone or mixed with other agents. In general, in the case of sulfuric acid esterification and phosphoric acid esterification products, the number of carbon atoms of an aliphatic group, a degree of lactic acidity, a degree of phosphorylation, and the position of a hydrophilic group in the molecular structure of the antistatic agent have a great correlation with the antistatic performance. The cationic system classified as follows is an amine salt type (RNH ₂ CH ₃ COOH), a quaternary ammonium salt type (RCONHC ₃ H ₆ N(CH ₃ ) ₂ CH ₂ CH ₂ OH]X (X=NO ₃ , ClO ₄ ) ), etc., it is widely used in post-processing processes due to its good antistatic properties, compatibility, and flexibility, but since it contains nitrogen in the molecule, there may be coloration due to oxidation, chlorine damage due to chlorine bleaching, and metal ions and contamination, adsorption, etc. There is a problem with it, so you need to be careful when using it. Nonionic types generally have low adsorption to fibers and have good smoothness to show uniform wettability to synthetic fibers. Polyoxyethylene fatty acid ester type (R-COO(CH ₂ CH ₂ O) _n H), polyoxyethylene There are alkyl ether type (RO(CH ₂ CH ₂ O) _n H), polyoxyethylene alkylphenol ether type, and polyoxyethylene alkylamine type, and it is widely used as a spinning emulsifier for synthetic fibers. On the other hand, amphoteric ionic systems containing both polar groups of cations and anions in the same molecule have excellent cationic performance and tactile feel, and have fewer chlorine disturbances. There are betaine type and imidazoline type, and betaine type is commonly used. Durable antistatic agent has excellent flexibility and heat resistance, does not change over time, can be used in combination with resin processing agents, water and oil repellents without reducing color fastness, and durability without dust absorption is required. Most of the durable antistatic agents are cationic polymer compounds or electrolyte polymer compounds with strong water absorption, for example, polyacrylic acid derivatives, polyvinylamine derivatives, polyamide derivatives, and cationic resins, among which the representative ones are cationic side chains. As a polyacrylic acid derivative with There is a method of treating the material, a method of treating the fiber with a polyamine containing polyethylene oxide together with a crosslinking agent, and forming an insolubilized three-dimensional network structure on the fiber surface by heat treatment.

The alcohol repellent may include a perfluoroalkyl material, a polyfluoroalkyl material, or a combination thereof.

The perfluoroalkyl material may include Perfluorinated Alkyl Acid (PFAA).

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

As an example, the melt blown nonwoven fabric layer may have antistatic properties and alcohol repellency.

Specifically, the melt blown nonwoven fabric layer may include an antistatic agent and an alcohol repellent agent.

In addition, the antistatic agent and the alcohol repellent agent included in the melt blown nonwoven fabric layer may be the same as the antistatic agent and the alcohol repellant agent included in each spunbond nonwoven fabric layer, respectively.

As another example, the melt blown nonwoven fabric layer may not have at least one of antistatic properties and alcohol repellency properties.

The medical composite nonwoven fabric may include the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbond nonwoven fabric layer in this order. However, the present invention is not limited thereto, and the medical composite nonwoven fabric may include the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in a different order.

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 include a plurality of spunbond nonwoven fabric sublayers that are each manufactured by a continuous process in one device and integrated with each other.

The melt-blown non-woven fabric layer may include a plurality of melt-blown non-woven sub-layers. Specifically, the melt-blown non-woven fabric layer may include a plurality of melt-blown non-woven fabric sub-layers that are each manufactured in a continuous process in one device and integrated with each other.

At least one spunbond nonwoven fabric and at least one melt blown nonwoven fabric included in the medical composite nonwoven fabric may each independently include a non-conductive polymer.

The non-conductive polymer may include polyolefin, polystyrene, polycarbonate, polyester, polyamide, a copolymer thereof, or a combination thereof.

The polyolefin may include polyethylene, polypropylene, poly-4-methyl-1-pentene, polyvinyl chloride, or a combination thereof.

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

The total content of the melt blown nonwoven fabric in the medical composite nonwoven fabric may be 3 to 50 parts by weight based on 100 parts by weight of the total weight of the composite nonwoven fabric. When the total content of the melt blown nonwoven fabric is within the above range, a composite nonwoven fabric having excellent shape stability and durability can be obtained.

The medical composite nonwoven fabric may have a basis weight (mass per unit area) of 10 to 500 g/m ² , for example, 20 to 100 g/m ² .

A plurality of nonwoven fabrics included in the medical composite nonwoven fabric may be integrated (ie, bonded) to each other by thermal fusion rather than ultrasonic fusion.

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

As an example, each of the additional layers may include at least one separate nonwoven fabric that is neither a spunbond nonwoven fabric nor a meltblown nonwoven fabric.

As another example, each of the additional layers may include one or more layers made of a material other than the non-woven fabric.

The medical composite nonwoven fabric may have a tensile strength of 0.1 to 0.3 kgf / 5 cm / gsm in the MD direction, 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 is ^{an abbreviation of g/m 2} , which means the weight per unit area of the composite nonwoven fabric.

In addition, the medical composite nonwoven fabric may have a stiffness in the MD direction of 20mm or more, 25mm or more, 30mm or more, or 35mm or more.

In addition, the medical composite nonwoven fabric may have a stiffness 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.

The medical use composite nonwoven fabric is the water pressure measured according to WSP 80.6 (09) 700mmH ₂ O or more, 720mmH ₂ O or more, 740mmH ₂ O or more, 760mmH ₂ O or more, 780mmH ₂ O or more, 800mmH ₂ O or more, 820mmH ₂ O over , 840mmH ₂ O or more, 860mmH ₂ O or more, 880mmH ₂ O or more, or 900mmH ₂ O or more.

In addition, the medical composite nonwoven fabric may have an alcohol repellency measured according to WSP 80.8 (05) of 8 or more or 9 or more.

In addition, the medical composite nonwoven fabric may have a surface resistance measured according to WSP 40.2(05) of 10 ¹² Ω or less, 10 ¹¹ Ω or less, 10 ¹⁰ Ω or less, 10 ⁹ Ω or less, or 10 ⁸ Ω or less.

The present inventors first developed a nonwoven fabric manufacturing method having a special configuration as described below, so that the water pressure resistance measured according to WSP 80.6 (09) is 800 mmH ₂ O or more, and the alcohol repellency measured according to WSP 80.8 (05) is It was possible to manufacture a medical composite nonwoven fabric with a grade of 9 or higher and a surface resistance of 10 ^{12 Ω or less.}

Hereinafter, a method for manufacturing a medical composite nonwoven fabric according to an embodiment of the present invention will be described in detail.

The method of manufacturing a medical composite nonwoven fabric according to an embodiment of the present invention comprises the steps of continuously forming a spunbond nonwoven layer (S10) and continuously forming a meltblown nonwoven fabric layer on the spunbonded nonwoven fabric layer (S20) include

The continuous forming step (S10) of the spunbond non-woven fabric layer is to melt extruded, cooled and stretched a thermoplastic non-conductive polymer to form a fiber yarn, and then laminated the fiber yarn on a screen belt to form a web (web forming). have.

Specifically, the continuous forming of the spunbond nonwoven layer (S10) includes the steps of continuously forming free fibers with a non-conductive polymer (S10-1), continuously spinning the free fibers (S10-2), and the free Continuously forming a spunbond nonwoven fabric by accumulating fibers (S10-3) and continuously spraying a first liquid containing an antistatic agent and an alcohol repellent agent to the formed spunbond nonwoven fabric to continuously surface the spunbond nonwoven fabric It may include a processing step (S10-4).

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

The first liquid may be prepared by adding the antistatic agent and the alcohol-repellent agent to a solvent (eg, water).

In addition, the first liquid may further include the above-described penetrating agent in addition to the antistatic agent and the alcohol repellent agent.

The first liquid may be a solution or a suspension.

In the continuous formation of the melt blown nonwoven layer (S20), a thermoplastic non-conductive polymer is melt-extruded, hot air drawn, and cooled to form a fiber yarn, and then the fiber yarn is continuously formed in the spunbond non-woven layer in the continuous forming step (S10). It may be laminated on a web-formed spunbond to form a web.

Specifically, the continuous formation of the melt blown nonwoven layer (S20) includes the steps of continuously forming free fibers with a non-conductive polymer (S20-1), continuously spinning the free fibers (S20-2), and Continuously forming a melt-blown nonwoven fabric by continuously accumulating free fibers (S20-3) and continuously spraying a second liquid containing an antistatic agent and/or an alcohol repellent agent to the formed melt-blown nonwoven fabric to form the melt blown nonwoven fabric It may include the step of continuously surface-treating the new nonwoven fabric (S20-4).

The continuous surface treatment of the melt blown nonwoven fabric ( S20 - 4 ) may be performed by continuously spraying the second liquid together with a gas (eg, air).

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

In addition, the second liquid may further include the above-described penetrating agent in addition to the antistatic agent and the alcohol repellent agent.

The second liquid may be a solution or a suspension.

Also, the step (S20) may not include the step (S20-4).

The present inventors spray the first liquid or the second liquid together with air into the spunbond nonwoven fabric layer or the meltblown nonwoven fabric layer in the form of an air in the form of a small jet amount of liquid particles having sufficient kinetic energy to contact the nonwoven fabric web, resulting in high efficiency A surface treatment device was developed to have antistatic and alcohol repellent effects of Its feature is that no equipment is required. Due to these features, the surface treatment apparatus has a feature that can compound the nonwoven fabric by continuous lamination in combination with the nonwoven fabric manufacturing process.

As described above, the manufacturing method of the medical composite nonwoven fabric includes a separate post-processing treatment and drying for removing the first liquid or the second liquid sprayed in each of the nonwoven continuous surface treatment steps (S10-4, S20-4). process may not be included.

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

The manufacturing method of the medical composite nonwoven fabric may further include a step (S30) of continuously forming another spunbond nonwoven fabric layer on the melt blown nonwoven fabric layer in the same manner as the continuous forming step (S10) of the spunbonded nonwoven fabric layer. have.

The manufacturing method of the medical composite nonwoven fabric is performed on one or both sides of the melt blown nonwoven fabric layer after the continuous formation of the melt blown nonwoven layer (S20) or the continuous formation of the spunbond nonwoven layer (S30). The step of continuously thermocompressing the bond nonwoven layer (S40) may be further included.

The first liquid or the second liquid continuously sprayed in each of the nonwoven continuous surface treatment steps S10-4 and S20-4 may be subjected to a drying process installed in the manufacturing process of the composite nonwoven fabric manufacturing apparatus.

The manufacturing method of the medical composite nonwoven fabric can be mass-produced, thereby reducing manufacturing costs, and since it does not include a separate antistatic and anti-alcohol treatment and drying process as a post-process after manufacturing the nonwoven fabric, a separate post-processing treatment And as in the prior art having a drying process, the melt-blown nonwoven fabric layer is stretched and damaged in a state exposed to a high drying temperature, thereby preventing a decrease in water pressure resistance.

1 is a view schematically showing 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 melt blown nonwoven fabric layer 12 , and a second spunbonded nonwoven fabric layer 13 .

In addition, by modifying the manufacturing method of the medical composite nonwoven fabric, medical composite nonwoven fabric having various structures and/or configurations may be manufactured.

Another aspect of the present invention provides an article comprising the medical composite nonwoven fabric.

The article may be a surgical cloth or a surgical gown.

Hereinafter, the present invention will be described in more detail through examples. These examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

Example 1: Preparation of medical composite nonwoven fabric

Polypropylene having a melt index (M.F.R) of 34 g/10 min was used as the main raw material for manufacturing the spunbond nonwoven fabric, and 3 wt % of master batch chips highly concentrated in phthalocyanine blue were added to express blue color. The main raw material and master batch chips that are constantly supplied are melt-kneaded in an extruder to form filaments through a spinneret, then cooled with cooling air and stretched with suction air under the belt, and the first spunbond nonwoven fabric is placed on a continuously driven conveyor belt. A layer and a second spunbond nonwoven layer were respectively formed. Polypropylene having a melt index (M.F.R) of 1100 g/10 min was used as the main raw material for manufacturing the melt blown nonwoven fabric, and 3 wt % of master batch chips having a high concentration of phthalocyanine blue as in the spunbond nonwoven layer were added. The main raw material and master batch chips supplied in a certain amount were melt-kneaded in an extruder, spun through a nozzle composed of a number of orifices, and then brought into contact with high-speed, concentrated heating air sprayed from a side nozzle. The high-speed heating air stretched the polymer spun through the micro-sized orifices, and the stretched polymer formed a microfiber-form melt-blown nonwoven fabric layer made of fine threads of 1 to 5 μm. The melt blown nonwoven fabric layer was adjusted to have a basis weight of 10 g/m 2 . In addition, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer were adjusted so that the entirety was composed of at least two layers, and finally the total weight including the meltblown nonwoven fabric layer was 47g/m2 of spunbond/meltblown A raw/spunbond (SMS) multilayer nonwoven web was formed. And before forming the multilayer nonwoven web, in order to impart alcohol repellency and antistatic properties to each of the spunbond nonwoven fabric layer and the melt blown nonwoven fabric layer, a perfluoroalkylethyl acrylate copolymer (concentration of 30 wt. %) 25 parts by weight, 4 parts by weight of a non-ionic compound (concentration of 50% by weight) as an antistatic agent, and 2 parts by weight of an alcohol-based compound (concentration of 70% by weight) as a penetrating agent to facilitate penetration of the agent into the nonwoven fabric Each of the nonwoven fabrics was surface-treated by continuously spraying the mixture prepared by mixing 969 parts by weight. The three types of nonwoven webs thus formed were thermocompression-bonded under calendar conditions in which the temperature of the emboss roll was 162°C, the temperature of the plate roll was 161°C, and the pressure was 90N/mm to give shape stability. Subsequently, the resultant was dried in a hot air dryer at 130° C. that was continuously moved to prepare a medical composite nonwoven fabric having excellent alcohol repellency and antistatic properties.

Example 2: Preparation 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 excluded during the surface treatment of the melt blown nonwoven fabric layer.

Example 3: Preparation 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 agent was excluded during the surface treatment of the melt blown nonwoven fabric layer.

Example 4: Preparation of medical composite nonwoven fabric

A medical composite nonwoven fabric was prepared in the same manner as in Example 1, except that an alcohol repellent agent and an antistatic agent were excluded during the surface treatment of the melt blown nonwoven fabric layer.

Comparative Example 1: Preparation of medical composite nonwoven fabric

Medical composite in the same manner as in Example 1, except that the alcohol repellent agent was excluded during the surface treatment of the second spunbond nonwoven fabric layer, and the alcohol repellent agent and the antistatic agent were excluded during the surface treatment of the melt blown nonwoven fabric layer. A nonwoven fabric was prepared.

Comparative Example 2: Preparation 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 excluded during the surface treatment of the second spunbond nonwoven fabric layer and the alcohol repellent agent was excluded during the surface treatment of the melt blown nonwoven fabric layer. .

Comparative Example 3: Preparation of medical composite nonwoven fabric

Except for excluding the alcohol repellent agent and antistatic agent during the surface treatment of the first spunbond nonwoven fabric layer and the surface treatment of the second spunbond nonwoven fabric layer, and excluding the antistatic agent during the surface treatment of the melt blown nonwoven fabric layer, A medical composite nonwoven fabric was prepared in the same manner as in Example 1.

Comparative Example 4: Preparation 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 agent and the antistatic agent were excluded during the surface treatment of the first spunbond nonwoven fabric layer and the surface treatment of the second spunbond nonwoven fabric layer.

Comparative Example 5: Preparation of medical composite nonwoven fabric

A spunbond/meltblown/spunbond multilayer nonwoven web having a total weight of 47 g/m 2 was formed by the method of Example 1. In order to impart alcohol repellency and antistatic properties to the multilayer nonwoven fabric thus formed, 25 parts by weight of a perfluoroalkylethyl acrylate copolymer (concentration of 30% by weight) as an alcohol repellent agent as post-processing, a nonionic antistatic agent (concentration of 50% by weight) ) Wet Pick Up rate ( = The line pressure of the padder mangle was adjusted so that it was 150 wt% based on the weight of the solvent-containing emulsion applied to the nonwoven fabric/the weight of the nonwoven fabric * 100). The resultant was dried at 36 sec/m in a hot air dryer at 135° C. continuously moved to prepare a medical composite nonwoven fabric with alcohol repellency and antistatic properties.

Comparative Example 6: Preparation 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 excluded during post-processing.

Comparative Example 7: Preparation 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 agent was excluded during post-processing.

Evaluation Example: Evaluation of Physical Properties of Medical Composite Nonwoven Fabric

Water pressure resistance, alcohol repellency and surface resistance of the medical composite nonwoven fabric prepared in Examples 1 to 4 and Comparative Examples 1 to 7 were evaluated in the following manner, and the results are shown in Table 1 below.

<Water pressure evaluation>

Water pressure resistance was measured using a water pressure measurement device (manufacturer TEXTEST, model name FX-3000-4M) according to Worldwide Strategic Partners (hereinafter referred to as "WSP") 80.6 (09).

<Evaluation of alcohol repellency>

Alcohol repellency was measured according to WSP 80.8 (05).

<Evaluation of surface resistance>

Surface resistance was measured using a surface resistance measuring device (manufacturer ADVANTEST, model name: R8340A) according to WSP 40.2 (05).

		Example							comparative example
		One	2		3		4		One		2
Method for imparting antistatic properties and alcohol repellency		jet	jet		jet		jet		jet		jet
SB1	antistatic	possession	possession		possession		possession		possession		possession
	alcohol repellency	possession	possession		possession		possession		possession		possession
MB	antistatic	possession	not possessed		possession		not possessed		not possessed		possession
	alcohol repellency	possession	possession		not possessed		not possessed		not possessed		not possessed
SB2	antistatic	possession	possession		possession		possession		possession		not possessed
	alcohol repellency	possession	possession		possession		possession		not possessed		possession
water pressure (mmH 2 O)	-	900	810		850		830		850		830
alcohol repellency (ranking)	SB1	9	9		9		9		9		9
	SB2	9	9		9		9		3		9
surface resistance (Ω)	SB1	6X10 10	2X10 11		7X10 10		8X10 10		1X10 11		8X10 10
	SB2	5X10 10	1X10 11		8X10 10		5X10 10		3X10 11		9X10 14
		comparative example
		3		4		5		6		7
Method for imparting antistatic properties and alcohol repellency		jet		jet		immersion+ dry		immersion+ dry		immersion+ dry
SB1	antistatic	not possessed		not possessed		possession		not possessed		possession
	alcohol repellency	not possessed		not possessed		possession		possession		not possessed
MB	antistatic	not possessed		possession		possession		not possessed		possession
	alcohol repellency	possession		possession		possession		possession		not possessed
SB2	antistatic	not possessed		not possessed		possession		not possessed		possession
	alcohol repellency	not possessed		not possessed		possession		possession		not possessed
water pressure (mmH 2 O)	-	800		790		520		530		500
alcohol repellency (ranking)	SB1	3		3		9		9		3
	SB2	3		3		9		9		3
surface resistance (Ω)	SB1	2X10 14		2X10 14		3X10 10		5X10 14		2X10 10
	SB2	4X10 14		3X10 14		4X10 10		5X10 14		3X10 10

Referring to Table 1, the medical composite nonwoven fabric prepared in Examples 1 to 4 has high water pressure resistance (≥ 800 mmH ₂ O) and alcohol repellency (≥ 9 grade) of both surfaces, and the surface resistance of both surfaces (≤ 10 ¹² Ω) was found to be low. On the other hand, the medical composite nonwoven fabric prepared in Comparative Examples 1 to 7 _{has a low water pressure resistance (< 800 mmH 2} O), a low alcohol repellency (< 9 grade) of at least one surface, and/or a surface of at least one surface The resistance (> 10 ¹² Ω) was found to be high.

Although the present invention has been described with reference to the drawings and embodiments, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Claims (17)

1. Medical composite nonwoven fabric with antistatic properties and alcohol repellency.
2. According to claim 1,

   The medical composite nonwoven fabric includes a first spunbond nonwoven fabric layer, a melt blown nonwoven fabric layer, and a second spunbond nonwoven fabric layer,

   The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer are medical composite nonwoven fabrics having antistatic properties and alcohol repellency, respectively.
3. 3. The method of claim 2,

   The melt blown nonwoven fabric layer is a medical composite nonwoven fabric having antistatic properties and alcohol repellency.
4. 3. The method of claim 2,

   The melt blown nonwoven fabric layer is a medical composite nonwoven fabric having at least one of antistatic properties and alcohol repellency properties.
5. 3. The method of claim 2,

   The medical composite nonwoven fabric comprises the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in this order.
6. 3. The method of claim 2,

   The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer each include a plurality of spunbond nonwoven fabric sublayers.
7. 3. The method of claim 2,

   The melt-blown non-woven fabric layer is a medical composite non-woven fabric comprising a plurality of melt-blown non-woven fabric sub-layers.
8. 3. The method of claim 2,

   Medical composite nonwoven further comprising at least one additional layer.
9. 3. The method of claim 2,

   Water pressure measured according to WSP 80.6(09) is 700mmH ₂ O or higher, alcohol repellency measured according to WSP 80.8(05) is grade 8 or higher, and surface resistance measured according to WSP 40.2(05) is 10 ¹² Ω The following medical composite nonwoven fabrics.
10. 10. The method of claim 9,

    A medical composite nonwoven fabric _{having a water pressure of 800 mmH 2} O or higher measured in accordance with WSP 80.6 (09), an alcohol repellency of grade 9 or higher measured in accordance with WSP 80.8 (05), and a surface resistance of 10 ^{12 Ω or less.}
11. Continuously forming a spunbond nonwoven layer (S10); and

    Continuously forming a melt blown nonwoven fabric layer on the spunbond nonwoven fabric layer (S20),

    The continuous forming of the spunbond nonwoven layer (S10) includes continuously forming free fibers with a non-conductive polymer (S10-1), continuously spinning the free fibers (S10-2), and continuously forming the free fibers (S10-2). Continuously forming a spunbond nonwoven fabric by integrating with a (S10-3) and continuously spraying a first liquid containing an antistatic agent and an alcohol repellent agent to the formed spunbond nonwoven fabric to continuously surface-treat the spunbond nonwoven fabric (S10-4),

    The continuous formation of the melt blown nonwoven layer (S20) includes the steps of continuously forming free fibers with a non-conductive polymer (S20-1), continuously spinning the free fibers (S20-2), and forming the free fibers Continuously accumulating to continuously form a melt blown nonwoven fabric (S20-3) and continuously spraying a second liquid containing an alcohol repellent agent to the formed melt blown nonwoven fabric to continuously surface-treat the melt blown nonwoven fabric A method of manufacturing a medical composite nonwoven fabric comprising the step (S20-4).
12. 12. The method of claim 11,

    The continuous surface treatment step (S10-4) of the spunbond nonwoven fabric and the continuous surface treatment step (S20-4) of the melt blown nonwoven fabric are performed by continuously spraying each liquid together with a gas.
13. 13. The method of claim 11 or 12,

    The method of manufacturing a medical composite nonwoven fabric further comprising the step (S30) of continuously forming another spunbonded nonwoven fabric layer on the melt blown nonwoven fabric layer in the same manner as the continuous forming step (S10) of the spunbond nonwoven fabric layer.
14. 14. The method of claim 13,

    After the continuous formation of the melt blown nonwoven fabric layer (S20) or the continuous formation of another spunbond nonwoven layer (S30), each of the spunbond nonwoven layers is successively thermocompression-bonded on one or both sides of the melt blown nonwoven fabric layer Method of manufacturing a medical composite nonwoven further comprising the step (S40).
15. 13. The method of claim 11 or 12,

    A method for manufacturing a medical composite nonwoven fabric that does not include a separate post-processing and drying process.
16. An article comprising the medical composite nonwoven according to any one of claims 1 to 10.
17. 17. The method of claim 16,

    The article is an article that is a surgical cloth or a surgical gown.

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