JP2023521127A - Composite nonwoven fabric for medical use, its manufacturing method, and articles thereof - Google Patents

Abstract

A composite nonwoven fabric for medical use, a method for producing the same, and an article thereof, wherein the composite nonwoven fabric has antistatic properties and alcohol repellency.

Description

TECHNICAL FIELD The present invention relates to a composite nonwoven fabric for medical use, a method for producing the same, and an article thereof, and more particularly to a composite nonwoven fabric for medical use, a method for producing the same, and an article thereof, which have excellent water pressure resistance, alcohol repellency, and low surface resistance. .

Conventionally, after manufacturing a nonwoven fabric, the manufactured nonwoven fabric is immersed in an antistatic and alcohol-repellent liquid and then dried to obtain a final nonwoven fabric.
However, as described above, if a separate post-processing treatment is performed, not only is the water pressure resistance required for medical nonwoven fabrics reduced, but there is also the problem of an increase in manufacturing costs.

An embodiment of the present invention provides a medical composite nonwoven fabric having excellent water pressure resistance, alcohol repellency, and low surface resistance.
Another aspect of the present invention provides a method for producing the composite nonwoven fabric for medical use.
Yet another aspect of the invention provides an article comprising the composite nonwoven fabric.

One aspect of the present invention is
A composite nonwoven fabric for medical use having antistatic properties and alcohol repellency is provided.
Said composite nonwoven fabric for medical use comprises a first spunbond nonwoven layer, a meltblown nonwoven layer and a second spunbond nonwoven layer, wherein said first spunbond nonwoven layer and said second spunbond nonwoven layer are respectively antistatic and repellent. May have alcoholic properties.

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

The composite nonwoven fabric for medical use 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 may also each comprise a plurality of spunbond nonwoven sublayers.

The meltblown nonwoven layer also includes a plurality of meltblown nonwoven sublayers.
Said nonwoven medical composite also further comprises at least one additional layer.

The composite nonwoven fabric for medical use has a water pressure resistance of 700 mmH ₂ O or higher as measured by WSP 80.6(09), and an alcohol repellency of grade 8 or higher as measured by WSP 80.8(05). It also has a surface resistance of 10 ¹² Ω or less as measured by WSP 40.2(05).
The composite nonwoven fabric for medical use has a water pressure resistance of 800 mmH ₂ O or higher as measured by WSP 80.6(09), and an alcohol repellency of grade 9 or higher as measured by WSP 80.8(05). It also has a surface resistance of 10 ¹² Ω or less.

Another aspect of the invention is
continuously forming a spunbond nonwoven layer (S10);
continuously forming a meltblown nonwoven layer on the spunbond nonwoven layer (S20);
The step of continuously forming the spunbond nonwoven fabric layer (S10) includes the step of continuously forming free fibers with a non-conductive polymer (S10-1), and the step of continuously spinning the free fibers (S10-2). ), continuously accumulating the free fibers to continuously form a spunbond nonwoven fabric (S10-3); Continuously jetting a liquid to continuously surface-treat the spunbond nonwoven fabric (S10-4);
The continuous formation of the meltblown nonwoven fabric layer (S20) includes the step of continuously forming free fibers using a non-conductive polymer (S20-1), and the step of continuously spinning the free fibers (S20-2). , the step of continuously accumulating the free fibers to continuously form a meltblown nonwoven fabric (S20-3); and continuously injecting a second liquid containing an alcohol-repellent agent onto the formed meltblown nonwoven fabric, Provided is a method for manufacturing a composite nonwoven fabric for medical use, comprising the step of continuously surface-treating a meltblown nonwoven fabric (S20-4).

The spunbond nonwoven fabric continuous surface treatment step (S10-4) and the meltblown nonwoven fabric continuous surface treatment step (S20-4) can also be performed by continuously injecting each liquid together with gas.

The method for manufacturing the composite nonwoven fabric for medical use includes 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) (S30). is also included.

In the method for manufacturing the composite nonwoven fabric for medical use, after the step of continuously forming the meltblown nonwoven fabric layer (S20) or after the step of continuously forming the other spunbond nonwoven fabric layer (S30), on one or both sides of the meltblown nonwoven fabric layer, each of the above The method further includes a step of continuously thermocompressing the spunbond nonwoven fabric layers (S40).

The method for manufacturing the composite nonwoven fabric for medical use does not include separate post-processing and drying steps.

Yet another aspect of the present invention is
An article is provided comprising the medical composite nonwoven fabric.
Said article is also a surgical cloth or 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 schematic view of a composite nonwoven fabric for medical use according to an embodiment of the present invention;

Hereinafter, a composite nonwoven fabric for medical use according to an embodiment of the present invention will be described in detail.
As used herein, the term "non-woven fabric composite" refers to a non-woven fabric laminate produced through a separate post-lamination process after two or more non-woven fabrics are separately produced. Instead, it means a nonwoven fabric in which two or more kinds of nonwoven fabrics are each manufactured by a continuous process in one apparatus and integrated with each other. Accordingly, "composite nonwoven fabric" is also referred to herein as "monolithic non-woven fabric". The composite nonwoven fabric for medical use is characterized by stronger interlaminar bonding and superior shape stability and filtration performance than the nonwoven fabric laminate.

Moreover, in the present specification, the "antistatic and alcohol-repellent spunbonded nonwoven layer" is also produced by a continuous process. Specifically, the "spunbond nonwoven fabric layer having antistatic properties and alcohol repellency" can be produced in a continuous process by "manufacturing a spunbond nonwoven fabric" and "surface preparation for imparting antistatic properties and alcohol repellency." It is also manufactured by performing "processing" sequentially or simultaneously.

In addition, in this specification, "tensile strength" refers to a test piece with a width of 5 cm (grip distance during evaluation: 10 cm) based on KSK 0520 through a tensile strength / elongation device (Instron), at a tensile speed of 500 mm / The tensile strength in the MD direction (mechanical direction) was measured.

In addition, in this specification, "bending strength" is measured by taking 16 samples (25 mm × 150 mm) in the MD and CD directions according to the measurement standard WSP (Worldwide Strategic Partners) 90.1, and measuring the sample with a bending resistance measuring instrument. In the above, the test piece was pushed in the direction of the inclined surface until it abutted against the inclined surface, and the length of the sample from the bend point to the point of contact with the inclined surface was measured in units of mm.

Moreover, in the present specification, the "meltblown nonwoven fabric layer having alcohol repellency" is also one produced by a continuous process. Specifically, the "meltblown nonwoven fabric layer having alcohol repellency" is produced by sequentially or simultaneously performing "production of meltblown nonwoven fabric" and "surface treatment for imparting alcohol repellency" in a continuous process. It is also manufactured.

In this specification, "water pressure resistance" was measured using a water pressure resistance measuring device (model FX-3000-4M (manufactured by TEXTEST)) according to WSP (Worldwide Strategic Partners) 80.6 (09). of.

Further, in this specification, "having antistatic properties" means having a surface resistance of 10 ¹⁵ Ω or less as measured by WSP 40.2(05).

In addition, "surface resistance" as used herein is measured using a surface resistance measuring device (model R8340A (manufactured by ADVANTEST)) according to WSP 40.2(05).

Moreover, in this specification, "having alcohol repellency" means that the alcohol repellency measured by WSP 80.8(05) is grade 4 or higher.

A composite nonwoven fabric for medical use according to an embodiment of the present invention has antistatic properties and alcohol repellency.

The composite nonwoven fabric for medical use also includes a first spunbond nonwoven layer, a meltblown nonwoven layer and a second spunbond nonwoven layer. Specifically, the composite nonwoven fabric for medical use may include a first spunbond nonwoven layer, a meltblown nonwoven layer and a second spunbond nonwoven layer, which are each manufactured by a continuous process in one apparatus and integrated with each other. .

The first spunbond nonwoven layer and the second spunbond nonwoven layer may have antistatic properties and alcohol repellency, respectively.
Specifically, the first spunbonded nonwoven fabric layer and the second spunbonded nonwoven fabric layer also contain an antistatic agent and an alcohol-repellent agent, respectively.

Said antistatic agent is also hydrophobic.
In addition, the first spunbonded nonwoven fabric layer and the second spunbonded nonwoven fabric layer further contain a penetrating agent for facilitating penetration of the antistatic agent and the alcohol-repellent agent inside the nonwoven fabric.

The penetrating agent improves the wettability of the antistatic agent and the alcohol-repellent agent in each of the first spunbond nonwoven layer and the second spunbond nonwoven layer, and improves the permeation performance into each of the spunbond nonwoven layers. play the role of

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

For example, the first spunbond nonwoven layer and the second spunbond nonwoven layer each also comprise an antistatic/alcohol repellent masterbatch.

The antistatic agent is mainly classified into anion type, cation type, nonion type and amphoteric type. Widely used for processing. In general, cationic and amphoteric systems, when used as components of fiber spinning and spinning emulsions, are used to a lesser extent as antistatic agents to impart flexibility to the final product. Examples of anionic systems include sulfonate type (RSO ₃ Na), sulfate 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. The phosphate ester salt type has good antistatic properties and is therefore widely used alone or mixed with other formulations. In general, in the molecular structure of the antistatic agent, products that have been sulfated or phosphated are charged according to the number of carbon atoms in the aliphatic group, the degree of lactic acidification, the degree of phosphorylation, and the position of the hydrophilic group. There is a strong correlation with prevention performance. Cationic _systems classified as follows are _amine salt type ( _RNH2CH3COOH ), quaternary ammonium _salt type ( _{RCONHC3H6N (CH3)2CH2CH2OH ) X} (X _{. _} Due to the chlorine damage caused by the metal ions, there are problems such as contamination and adsorption with metal ions, so caution is required in use. Nonionics generally _have a small adsorptive power to fibers, good smoothness, and uniform wettability to synthetic fibers. ₂ O) _n H), polyoxyethylene alkyl ether type (RO(CH ₂ CH ₂ O) _n H), polyoxyethylene alkylphenol ether type and polyoxyethylene alkylamine type, etc., and are widely used as spinning emulsions for synthetic fibers. be done. In addition, the amphoteric ionic system containing cationic and anionic amphoteric polar groups in the same molecule has the characteristics of being excellent in cationic performance and tactile sensation, and having little chlorine interference. There are betaine type and imidazoline type, and betaine type is generally used. Durable antistatic agents have excellent flexibility and heat resistance, do not change over time, do not reduce color fastness, can be used in combination with resin processing agents, water repellent agents, and oil repellent agents, and are effective in absorbing dust. non-sustainability is required. 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. Among them, representative ones are polyacrylic acid derivatives with cationic side chains, which are treated with poly(beta-methacryloxyethyldimethylethylammonium methosulfate) on fibers and then post-treated with anionic activators. , a method of forming a complex on the fiber, a method of treating the complex dispersed as a nonionic activator, a method of treating the fiber with a polyamine containing polyethylene oxide in combination with a cross-linking agent, and heat treatment , a method of forming an insolubilized three-dimensional network structure on the fiber surface, and the like.

The alcohol repellent may also include perfluoroalkyl substances, polyfluoroalkyl substances, or combinations thereof.
The perfluoroalkyl substance also includes perfluorinated alkyl acid (PFAA).
The perfluorinated alkyl acid also includes perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), or combinations thereof.
As an example, the meltblown nonwoven layer may have antistatic properties and alcohol repellency.

Specifically, the meltblown nonwoven fabric layer also contains an antistatic agent and an alcohol-repellent agent.
Also, 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 the spunbonded nonwoven fabric layers, respectively.

As another example, the meltblown nonwoven layer does not have at least one of antistatic properties and alcohol repellency.

The composite nonwoven fabric for medical use also includes 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 so limited and the medical composite nonwoven may also comprise the first spunbond nonwoven layer, the meltblown nonwoven layer and the second spunbond nonwoven layer in different order.

The first spunbond nonwoven layer and the second spunbond nonwoven layer may also each comprise a plurality of spunbond nonwoven sublayers. Specifically, the first spunbond nonwoven layer and the second spunbond nonwoven layer may each comprise a plurality of spunbond nonwoven sub-layers that are manufactured by a continuous process and integrated with each other in one piece of equipment. be.

The meltblown nonwoven layer also includes a plurality of meltblown nonwoven sublayers. Specifically, the meltblown nonwoven layer may also include a plurality of meltblown nonwoven sublayers each manufactured in a continuous process and integrated with one another in one piece of equipment.

At least one spunbond nonwoven fabric and at least one meltblown nonwoven fabric contained in the composite nonwoven fabric for medical use also independently contain a non-conductive polymer.
Said non-conducting polymers also include polyolefins, polystyrenes, polycarbonates, polyesters, polyamides, copolymers thereof, or combinations thereof.

The polyolefin may also include polyethylene, polypropylene, poly-4-methyl-1-pentene, polyvinyl chloride, or combinations thereof.
The polyester also includes polyethylene terephthalate, polylactic acid, or combinations thereof.

In the composite nonwoven fabric for medical use, the total content of the meltblown nonwoven fabric is also 3-50 parts by weight based on the total weight of 100 parts by weight of the composite nonwoven fabric. When 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.

The composite nonwoven fabric for medical use also has a basis weight (mass per unit area) of 10 to 500 g/m ² , such as 20 to 100 g/m ² .
A plurality of nonwoven fabrics included in the composite nonwoven fabric for medical use are also integrated (that is, bonded) to each other by thermal fusion instead of ultrasonic fusion.

Said nonwoven medical composite also further comprises at least one additional layer.
By way of example, each additional layer is neither a spunbond nonwoven nor a meltblown nonwoven, but comprises one or more separate nonwovens.
As another example, each of the additional layers may include one or more layers of other material than nonwoven fabric.

The composite nonwoven fabric for medical use has a tensile strength in the MD direction 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 is an abbreviation for g/m ² and means the weight per unit area of the composite nonwoven fabric.

Further, the medical composite nonwoven fabric 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.
In addition, the composite nonwoven fabric for medical use 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.

The composite nonwoven fabric for medical use has a water pressure resistance of 700 _mmH2O or more, 720 mmH2O _or more, 740 mmH2O _or more, 760 mmH2O _or more, 780 mmH2O _or more, or ₈₀₀ mmH2O as measured by WSP 80.6(09). 820 _mmH2O or more, 840 _mmH2O or more, 860 _mmH2O or more, 880 _mmH2O or more, or 900 _{mmH2O or} more.

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).
In addition, the composite nonwoven fabric for medical use 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 Ω or less as measured by WSP 40.2(05). .

As described below, the present inventors first developed a nonwoven fabric manufacturing method with a special configuration, the water pressure resistance measured by WSP 80.6 (09) is 800 mmH ₂ O or more, and the WSP A medical composite nonwoven fabric having an alcohol repellency of grade 9 or higher as measured by 80.8(05) and a surface resistance of 10 ¹² Ω or lower was successfully produced.

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

In the step of continuously forming spunbond nonwoven fabric layers (S10), a non-conductive thermoplastic polymer is melt-extruded, cooled and stretched to form fiber yarns, and then the fiber yarns are laminated on a screen belt. It is also webforming.

Specifically, the step of continuously forming a spunbond nonwoven fabric layer (S10) includes the step of continuously forming free fibers using a non-conductive polymer (S10-1), and continuously spinning the free fibers. step (S10-2), continuously accumulating the free fibers to continuously form a spunbond nonwoven fabric (S10-3), and adding an antistatic agent and alcohol repellent to the spunbond nonwoven fabric thus formed (S10-3); It also includes a step (S10-4) of continuously spraying the agent-containing first liquid to continuously surface-treat the spunbond nonwoven fabric.

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

The first liquid is also produced by adding the antistatic agent and the alcohol-repellent agent to a solvent (for example, water).
In addition, the first liquid further contains the above-described penetrant in addition to the antistatic agent and the alcohol-repellent agent.
The first liquid is both a solution and a suspension.

In the step of continuously forming meltblown nonwoven fabric layers (S20), the thermoplastic non-conductive polymer is melt extruded, hot air drawn and cooled to form fiber yarns, and then the fiber yarns are formed into the spunbond nonwoven fabric. It is also laminated on the spunbond web formed in the continuous layer forming step (S10) to form a web.

Specifically, 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), and the step of continuously spinning the free fibers. (S20-2), continuously accumulating the free fibers to continuously form a meltblown nonwoven fabric (S20-3), and adding an antistatic agent and/or an alcohol-repellent agent to the formed meltblown nonwoven fabric. It also includes a step (S20-4) of continuously spraying the contained second liquid to continuously surface-treat the meltblown nonwoven fabric.

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

The second liquid is also produced by adding the antistatic agent and/or the alcohol-repellent agent to a solvent (for example, water).
In addition, the second liquid further contains the above-described penetrating agent in addition to the antistatic agent and the alcohol-repellent agent.
The second liquid is both a solution and a suspension.

Also, the step (S20) does not include the step (S20-4).
The present inventors sprayed a first liquid or a second liquid together with air onto a spunbond nonwoven fabric layer or a meltblown nonwoven fabric layer in the form of two fluids, and with a small amount of spray, liquid particles having sufficient kinetic energy were formed. A surface treatment device is developed to have highly efficient antistatic and alcohol-repellent effects in contact with a nonwoven web. It is characterized in that it does not require separate drying equipment because it is sufficiently heated and evaporated by heated air. Due to such characteristics, the surface treatment apparatus is combined with the nonwoven fabric manufacturing process, and is characterized in that the nonwoven fabric can be composited through continuous lamination.

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

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

The method for manufacturing the composite nonwoven fabric for medical use includes 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) (S30). is also included.

In the method for manufacturing the composite nonwoven fabric for medical use, after the step of continuously forming the meltblown nonwoven fabric layer (S20) or after the step of continuously forming the other spunbond nonwoven fabric layer (S30), on one or both sides of the meltblown nonwoven fabric layer, each of the above The method further includes a step of continuously thermocompressing the spunbond nonwoven fabric layers (S40).

The first liquid or the second liquid continuously sprayed in each nonwoven fabric continuous surface treatment step (S10-4, S20-4) undergoes a drying process provided in the manufacturing process of the composite nonwoven fabric manufacturing apparatus. Out.

The manufacturing method of the composite nonwoven fabric for medical use enables mass production, reduces the manufacturing cost, and does not require separate antistatic treatment, alcohol-repellent treatment, and drying process after manufacturing the nonwoven fabric. In addition, the meltblown nonwoven fabric layer is stretched and damaged while being exposed to a high drying temperature, so that the water pressure resistance is lowered, as in the conventional technology having separate post-processing and drying processes. can be prevented.

FIG. 1 is a diagram schematically showing a medical composite nonwoven fabric 10 according to an embodiment of the present invention.
A composite nonwoven fabric 10 for medical use according to one embodiment of the present invention includes a first spunbond nonwoven layer 11 , a meltblown nonwoven layer 12 and a second spunbond nonwoven layer 13 .

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

Hereinafter, the present invention will be described in more detail through examples. The present examples are intended to describe the present invention more specifically, and the scope of the present invention is not limited to these examples.

Example 1: Production of composite nonwoven fabric for medical use Polypropylene with a melting index (M.F.R) of 34 g/10 min was used as the main raw material for producing spunbond nonwoven fabric, and phthalocyanine blue was used to develop a blue color. 3% by weight of masterbatch chips highly concentrated in Constantly supplied main raw materials and masterbatch chips are melted and kneaded in an extruder, formed into filaments through a spinneret, cooled with cooling air, stretched with air sucked from the bottom of the belt, and continuously driven. A first spunbond nonwoven layer and a second spunbond nonwoven layer were each formed on a conveyor belt. Polypropylene with a melting index (M.F.R) of 1,100 g/10 minutes is used as the main raw material for the production of meltblown nonwoven fabrics. 3% by weight was added. The main material and masterbatch chips supplied in fixed amounts are melted and kneaded in an extruder, spun through a spinneret composed of multiple orifices, and then injected from a side nozzle with high-speed concentrated heating. brought into contact with air. As such, the high-speed heated air draws the spun polymer through the fine-sized orifice, and the drawn polymer is microfiber-like consisting of fine-thickness threads of 1 to 5 μm. A meltblown nonwoven layer was formed. The meltblown nonwoven layer was adjusted to have a basis weight of 10 g/ ^m2 . In addition, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer are adjusted to be composed of at least two layers, and the final total weight including the meltblown nonwoven fabric layer is 47 g/m ² . A spunbond/meltblown/spunbond (SMS) multilayer nonwoven web was formed. Before forming the multi-layer nonwoven fabric web, the spunbond nonwoven fabric layer and the meltblown nonwoven fabric layer are each coated with a perfluoroalkylethyl acrylate alcohol-repellent agent to impart alcohol repellency and antistatic properties. 25 parts by weight of polymer (concentration 30% by weight), 4 parts by weight of nonionic compound (concentration 50% by weight) as an antistatic agent, and alcohol as a penetrating agent for facilitating the penetration of the formulation inside the nonwoven fabric A mixture prepared by mixing 2 parts by weight of a base compound (concentration: 70% by weight) with 969 parts by weight of water was continuously jetted to surface-treat each of the nonwoven fabrics. The three types of nonwoven webs thus formed were thermocompressed under the calender conditions of an embossing roll temperature of 162° C., a plate roll temperature of 161° C., and a pressure of 90 N/mm. was granted. Next, the resulting product was dried in a continuously moving 130° C. hot air dryer to produce a composite nonwoven fabric for medical use with excellent alcohol repellency and antistatic properties.

Example 2: Manufacture of composite nonwoven fabric for medical use A composite nonwoven fabric for medical use was manufactured 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.

Example 3: Manufacture of composite nonwoven fabric for medical use A composite nonwoven fabric for medical use was manufactured in the same manner as in Example 1, except that the alcohol-repellent agent was not used during the surface treatment of the meltblown nonwoven fabric layer.

Example 4: Manufacture of composite nonwoven fabric for medical use A composite nonwoven fabric for medical use was manufactured in the same manner as in Example 1, except that the alcohol-repellent agent and antistatic agent were omitted during the surface treatment of the meltblown nonwoven fabric layer. manufactured.

Comparative Example 1: Manufacture of composite nonwoven fabric for medical use 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 meltblown nonwoven fabric layer. A composite nonwoven fabric for medical use was produced in the same manner as in Example 1, except for the above.

Comparative Example 2: Manufacture of composite nonwoven fabric for medical use A composite nonwoven fabric for medical use was produced in the same manner as in Example 1.

Comparative Example 3: Manufacture of composite nonwoven fabric for medical use During the surface treatment of the first spunbond nonwoven fabric layer and the surface treatment of the second spunbond nonwoven fabric layer, the alcohol-repellent agent and the antistatic agent were excluded, and the surface of the meltblown nonwoven fabric layer was treated. A composite nonwoven fabric for medical use was manufactured in the same manner as in Example 1, except that the antistatic agent was omitted during treatment.

Comparative Example 4: Manufacture of composite nonwoven fabric for medical use Except that the alcohol-repellent agent and the antistatic agent were excluded during the surface treatment of the first spunbond nonwoven layer and the surface treatment of the second spunbond nonwoven layer. A composite nonwoven fabric for medical use was produced in the same manner as in Example 1 above.

Comparative Example 5 Preparation of Medical Composite Nonwoven Using the method of Example 1, a spunbond/meltblown/spunbond multilayer nonwoven web having a total weight of 47 g/m ² was formed. 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: 30% by weight), which is an alcohol repellent agent, is post-processed. , 4 parts by weight of a nonionic antistatic agent (concentration of 50% by weight), and 2 parts by weight of a penetrating agent (70% by weight of concentration) to facilitate the penetration of the formulation into the nonwoven fabric, mixed with 969 parts by weight of water. Then, the nonwoven fabric is deposited in a crude liquid bath that is continuously supplied, and the wet pickup rate (= weight of emulsion containing solvent soaked in nonwoven fabric / weight of nonwoven fabric * 100) is 150% by weight. The linear pressure of the padder mangle was adjusted so that The resulting product 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.

Comparative Example 6: A composite nonwoven fabric for medical use was manufactured in the same manner as in Comparative Example 5, except that the antistatic agent was omitted during post-processing of the composite nonwoven fabric for medical use.

Comparative Example 7: A composite nonwoven fabric for medical use was manufactured in the same manner as in Comparative Example 5, except that the alcohol-repellent agent was omitted during post-processing of the composite nonwoven fabric for medical use.

Evaluation example: Evaluation of physical properties of composite nonwoven fabrics for medical use Water pressure resistance, alcohol repellency and surface resistance of the composite nonwoven fabrics for medical use produced in Examples 1 to 4 and Comparative Examples 1 to 7 were evaluated by the following methods. The results are shown in Table 1 below.

<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 (manufactured by TEXTEST)).
<Alcohol repellency evaluation>
Alcohol repellency was measured by WSP 80.8(05).
<Surface resistance evaluation>
The surface resistance was measured according to WSP 40.2(05) using a surface resistance measuring device (Model R8340A (manufactured by ADVANTEST)).

Referring to Table 1 above, the medical composite nonwoven fabrics produced in Examples 1 to 4 had high water pressure resistance (≧800 mmH ₂ O) and alcohol repellency (≧9 grade) on both surfaces. The surface resistance (≦10 ¹² Ω) of the surface is shown to be low. On the other hand, the medical composite nonwoven fabrics produced in Comparative Examples 1 to 7 have low water pressure resistance (<800 mmH ₂ O), low alcohol repellency (<9 grade) on at least one side surface, and/or at least High surface resistance (>10 ¹² Ω) of one side surface is shown.

Although the present invention has been described with reference to the drawings and examples, which are illustrative only, it will be appreciated by those skilled in the art that various modifications and equivalent modifications may be made therefrom. It will be appreciated that implementations of are possible. Therefore, the true technical scope of protection of the present invention is determined by the technical ideas of the claims.

Claims (17)

Medical composite nonwoven fabric having antistatic properties and alcohol repellency. The composite nonwoven fabric for medical use comprises a first spunbond nonwoven layer, a meltblown nonwoven layer and a second spunbond nonwoven layer,
The composite nonwoven fabric for medical use according to claim 1, wherein the first spunbond nonwoven layer and the second spunbond nonwoven layer have antistatic properties and alcohol repellency, respectively. 3. The composite nonwoven fabric for medical use according to claim 2, wherein the meltblown nonwoven layer has antistatic properties and alcohol repellency. 3. The composite nonwoven fabric for medical use according to claim 2, wherein the meltblown nonwoven layer does not have at least one of antistatic properties and alcohol repellency. 3. The medical composite nonwoven fabric according to claim 2, wherein the medical composite nonwoven fabric comprises the first spunbond nonwoven layer, the meltblown nonwoven layer and the second spunbond nonwoven layer in that order. 3. The medical composite nonwoven fabric of claim 2, wherein the first spunbond nonwoven layer and the second spunbond nonwoven layer each comprise a plurality of spunbond nonwoven sublayers. 3. The composite nonwoven medical grade of Claim 2, wherein the meltblown nonwoven layer comprises a plurality of meltblown nonwoven sublayers. 3. The nonwoven medical composite according to claim 2, further comprising at least one additional layer. Water pressure resistance measured by WSP 80.6(09) is 700 mmH ₂ O or more, alcohol repellency measured by WSP 80.8(05) is grade 8 or more, WSP 40.2(05) The composite nonwoven fabric for medical use according to claim 2, which has a surface resistance of 10 ¹² Ω or less as measured by . Water pressure resistance measured by WSP 80.6 (09) is 800 mmH ₂ O or more, alcohol repellency measured by WSP 80.8 (05) is grade 9 or more, and surface resistance is 10 ¹² Ω or less. The composite nonwoven fabric for medical use according to claim 9, which is continuously forming a spunbond nonwoven layer (S10);
continuously forming a meltblown nonwoven layer on the spunbond nonwoven layer (S20);
The step of continuously forming the spunbond nonwoven fabric layer (S10) includes the step of continuously forming free fibers with a non-conductive polymer (S10-1), and the step of continuously spinning the free fibers (S10-2). ), continuously accumulating the free fibers to continuously form a spunbond nonwoven fabric (S10-3); Continuously jetting a liquid to continuously surface-treat the spunbond nonwoven fabric (S10-4);
The continuous formation of the meltblown nonwoven fabric layer (S20) includes the step of continuously forming free fibers using a non-conductive polymer (S20-1), and the step of continuously spinning the free fibers (S20-2). , the step of continuously accumulating the free fibers to continuously form a meltblown nonwoven fabric (S20-3); and continuously injecting a second liquid containing an alcohol-repellent agent onto the formed meltblown nonwoven fabric, A method for producing a composite nonwoven fabric for medical use, comprising the step of continuously surface-treating the meltblown nonwoven fabric (S20-4). 12. The method according to claim 11, wherein said spunbond nonwoven continuous surface treatment step (S10-4) and said meltblown nonwoven continuous surface treatment step (S20-4) are performed by continuously injecting each of said liquids together with gas. A method for producing the medical composite nonwoven fabric described. 13. The method according to claim 11 or 12, further comprising the step of continuously forming another spunbond nonwoven layer on the meltblown nonwoven layer (S30) in the same manner as the step of continuously forming the spunbond nonwoven layer (S10). A method for producing the medical composite nonwoven fabric described. After the meltblown nonwoven layer continuous formation step (S20) or the other spunbond nonwoven layer continuous formation step (S30), the spunbond nonwoven layers are continuously heated on one or both sides of the meltblown nonwoven layer. 14. The method for producing a composite nonwoven fabric for medical use according to claim 13, further comprising a step of pressing (S40). 13. The method for producing a composite nonwoven fabric for medical use according to claim 11 or 12, which does not include separate post-processing and drying steps. An article comprising the medical nonwoven composite according to any one of claims 1-10. 17. The article of claim 16, wherein the article is a surgical cloth or surgical gown.

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