KR101597760B1 - Method for preparing dust-proof fabrics having improved water-swelling resistance and wear comfortableness - Google Patents

Abstract

The present invention relates to a method for preparing a dustproof fabric. The method includes the steps of: (a) preparing a base fabric which has conductive fibers and polyester fibers woven in a combined manner and has a weight of 75 g/yd to 120 g/yd; and (b) coating a polyurethane resin onto the base fabric and thermally treating the base fabric in order to form a polyurethane coating layer having a non-swellable porous structure including pores. The polyurethane coating layer is formed by coating an imperforate and hydrophilic polyurethane composition, which is obtained by dissolving the imperforate and hydrophilic polyurethane resin into a mixed solvent including first and second organic solvents as well as water, onto the base fabric. The polyurethane coating layer goes through three-stages of heat treatment at the boiling points of the first organic solvent, water, and the second organic solvent in order to form the polyurethane coating layer having the non-swellable porous structure with dense pores.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to dust-proof fabrics having improved water-swellability and wearing comfort,

The present invention relates to a method of manufacturing an antivibration fabric. More particularly, the present invention relates to a method for fabricating an antivibration fabric which is difficult to swell due to moisture and can simultaneously satisfy comfort performance, lightness, and particulate collection efficiency such as air permeability and moisture permeability.

In today's high-tech industrial age, production environments are increasingly demanding high purity and sterilization. These high-purity and aseptic production environments include bioclean room (BCR) systems for preventing biological contamination such as medical industry, pharmaceutical industry, food industry, and the like, as well as semiconductor industry, precision machinery industry, And an industrial clean room (ICR) system to prevent contamination.

Semiconductor production in the semiconductor industry occurs in a clean room that includes an upper filter and a grating pad. In the clean room, clean air is introduced into the clean room through the upper filter, and clean air introduced into the clean room is discharged through the grating pad. When the clean air is discharged, the particles in the clean room are also discharged.

In the clean room, particles originating from the worker also cause pollution. Accordingly, the workers working in the clean room wear special clothes such as dustproof clothing. That is, it is possible to prevent leakage of particles generated from an operator by wearing a dustproof cloth.

The dustproof clothing should take into account such requirements as comfort such as air permeability and moisture permeability, particle filtration efficiency, and human skin rash suppression characteristics. Therefore, the garment is made of a polyester fabric mainly coated with a porous or non-porous polyurethane coating. In the case of the fabric made of polyester fabric, although the efficiency of removing contaminants such as particles is good, the comfort performance (air permeability, moisture permeability) and lightweight property are poor, and improvement of wearing comfort of the anti-vibration clothes is still a problem.

The method of coating a polyurethane coating on a polyester (PE) fabric can be roughly divided into a wet coating method and a dry coating method. The wet coating method is a method in which a polyurethane resin composition obtained by dissolving a polyurethane resin in a polar solvent such as dimethylformamide (DMF) is coated on a PE fabric, and the resultant is immersed in a coagulation bath containing water, And converting the polyurethane coating into a microporous structure by extracting a polar organic solvent such as DMF contained therein with water. However, the wet coating method has a problem that the production cost is high, the quality is high, and a large amount of waste water is generated. The dry coating method is a method of forming a polyurethane coating by applying a polyurethane resin composition on a PE fabric and then applying heat to the resultant to vaporize the organic solvent in the composition. The dry coating method has no problem of generating a large amount of wastewater, and it is easy to obtain a thin polyurethane coating, but the obtained polyurethane coating film may swell easily due to moisture.

Therefore, a problem to be solved by the present invention is that there is no problem of generating a large amount of wastewater, and it is easy to obtain a thin polyurethane coating film, and the resulting polyurethane coating film is difficult to swell by moisture, The present invention also provides a method of manufacturing an antivibration fabric that can satisfy both the same comfort performance, light weight, and particulate collection efficiency at the same time.

In order to solve the above problems, according to one aspect of the present invention,

(a) preparing a base fabric having conductive fibers and pulley-ester fibers interwoven with each other and having a weight of from 75 g / yd to 120 g / yd; And

(b) coating a polyurethane resin on the base fabric and heat-treating the polyurethane resin to form a polyurethane coating layer having a non-swellable porous type pore structure,

(B) forming the polyurethane coating layer comprises:

b1) A first organic solvent and a second organic solvent (the boiling point of the first organic solvent and the boiling point of the second organic solvent) are mixed with a nonporous polyurethane resin to form a hydrophilic organic polyurethane organic solution step;

b2) forming a hydrophilic Unperforated polyurethane compositions by the addition of water (H ₂ 0) in the hydrophilic polyurethane Unperforated organic solution present in the polyurethane polymer structure swollen state;

b3) The hydrophilic nonporous polyurethane composition is coated on the base fabric with a non-swelling microporous type coating amount of 2 to 10 g / m < 2 > and a thickness of 2 to 100 mu m to form a polyurethane coating step; And

b4) The polyurethane coating is heat-treated in three stages from the boiling point of the first organic solvent, the boiling point of the water, and the boiling point of the second organic solvent, respectively. The heat treatment is started from the lowest boiling point and the heat treatment is finished at the highest boiling point , Which comprises 1 to 15% of micropores having a diameter of 0.01 to less than 1 占 퐉, 30% or more of pores having a diameter of 1 to 10 占 퐉, and an average pore diameter of 1 to 20 Forming a polyurethane coating layer having a non-swellable porous type pore structure containing micropores having a specific surface area of 1 to 10 mu m,

The method of manufacturing an antivibration fabric is provided.

In one embodiment of the present invention, the first organic solvent is methyl ethyl ketone, and the second organic solvent is toluene.

In one embodiment, the b2) phase of the water (H ₂ 0) and the b1), but additionally the first and second organic solvent used in step mixing said hydrophilic Unperforated poly finally formed with The addition amount of water may be adjusted so that the weight of the water in the urethane composition is larger than the total weight of the first and second organic solvents.

In one embodiment of the present invention, 10 to 16 parts by weight of the first organic solvent and 10 to 20 parts by weight of the second organic solvent are mixed in the step b1) based on 100 parts by weight of the hydrophilic nonporous polyurethane resin ,

In one embodiment of the present invention, a solvent mixed with 40 to 50 parts by weight of water and 5 to 10 parts by weight of the first organic solvent may be further added in step b2).

In one embodiment of the present invention, the coating of the polyurethane resin in the step (b) may be carried out by knife coating, gravure coating, coma coating, top coating, offset coating, spray coating or reverse coating.

In one embodiment of the present invention, in the step (b), the polyurethane coating layer may be formed in a porous front coating type, a dot shape, or a line shape.

In one embodiment of the present invention, the finally obtained dust-proof fabric may have an air permeability (OTR) of 0.5 to 2.0 cm 3 / cm 2 / s.

In one embodiment of the present invention, the ultimately obtained dust-proof fabric may have a moisture vapor transmission rate (WVTR) of 7,000 to 9,000 g / m 2/24 hr.

According to another aspect of the present invention,

(a) preparing a base fabric having conductive fibers and pulley-ester fibers interwoven with each other and having a weight of from 75 g / yd to 120 g / yd; And

(b) coating a polyurethane resin on the base fabric and heat-treating the polyurethane resin to form a polyurethane coating layer having a non-swellable porous type pore structure,

The step of forming the polyurethane coating layer comprises:

b1) mixing hydrophilic nonporous polyurethane resin with methyl ethyl ketone and toluene to form a hydrophilic organic polyurethane organic solution;

b2) forming a hydrophilic Unperforated polyurethane compositions by the addition of water (H ₂ 0) in the hydrophilic polyurethane Unperforated organic solution present in the polyurethane polymer structure swollen state;

b3) The hydrophilic nonporous polyurethane composition is coated on the base fabric with a non-swelling microporous type coating amount of 2 to 10 g / m < 2 > and a thickness of 2 to 100 mu m to form a polyurethane coating step; And

b4) The polyurethane coating is subjected to a first heat treatment in three steps at a boiling point of the methyl ethyl ketone, a boiling point of the water and a boiling point of the toluene, followed by a first heat treatment at 80 DEG C for 30 seconds to 90 seconds, And a third heat treatment is performed at 110 캜 for 15 seconds to 45 seconds for 1 to 15% of micropores having a diameter of at least 0.01 탆 and less than 1 탆, Forming a polyurethane coating layer having a non-swellable porous type pore structure containing micropores having 30% or more of pores having a diameter of 1 占 퐉 to 10 占 퐉 and having an average pore diameter of 1 占 퐉 to 20 占 퐉,

The b2) Step of water (H ₂ 0) and with the b1), but additionally mixed with the methyl ethyl ketone and the toluene used in step, and finally the formed hydrophilic Unperforated polyurethane composition in the water weight of the methyl acetate in the The amount of water added is controlled so as to be greater than the total weight of the ketone and the toluene,

In step b1), 10 to 16 parts by weight of the methyl ethyl ketone and 10 to 20 parts by weight of the toluene are mixed, based on 100 parts by weight of the hydrophilic nonporous polyurethane resin,

And a solvent mixed with 40 to 50 parts by weight of water and 5 to 10 parts by weight of methyl ethyl ketone is further added in the step b2).

The dust-proof fabric obtained by the dust-proof fabric manufacturing method of the present invention can exhibit the following technical effect.

First, since the polyurethane coating layer is formed by the dry coating method, the dustproof fabric manufactured according to one embodiment of the present invention has no problem of generating a large amount of wastewater, and the polyurethane coating layer is thin, A specific high-performance microporous polyurethane coating layer having dense pore densities of various sizes formed by volatilizing a solvent having different boiling points at at least three different temperatures when forming a polyurethane coating layer, Unlike the dust-proof fabric obtained by the present invention, the wearer's comfort is improved while maintaining the high efficiency of blocking the fine particles generated in the human body, and the chemical resistance, peel strength of the coating layer, and washing durability can be improved.

Since the polyurethane coating layer has a non-swellable porous type pore structure, the dustproof fabric produced according to one embodiment of the present invention hardly swells due to moisture during washing.

Therefore, the dustproof fabric obtained according to the manufacturing method of the present invention can be used not only for various purposes but also for various clothes requiring moisture-proof moistureproof performance.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given above, serve to further the understanding of the technical idea of the invention. Should not be construed to limit the scope of
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a section of an anti-vibration fabric obtained by a manufacturing method according to an embodiment of the present invention. FIG.
FIGS. 2A and 2B are schematic diagrams showing a dustproof garment obtained by a manufacturing method according to an embodiment of the present invention, respectively.
FIG. 3 is a schematic view showing the anti-vibration clothes obtained by the manufacturing method according to one embodiment of the present invention.
FIG. 4 is a schematic view showing the anti-vibration clothes obtained by the manufacturing method according to an embodiment of the present invention. FIG.
FIG. 5 is a schematic view showing a dustproof cloth obtained by a manufacturing method according to an embodiment of the present invention. FIG.
FIG. 6 is a schematic view illustrating a dustproof cloth obtained by a manufacturing method according to an embodiment of the present invention. FIG.
FIG. 7 is a schematic view showing the dustproof clothing obtained by the manufacturing method according to an embodiment of the present invention. FIG.
FIG. 8 is a photograph showing a state in which the dustproof clothing obtained by the manufacturing method according to an embodiment of the present invention is worn.
9A and 9B are SEM photographs of a polyurethane coating layer of an antivibration fabric obtained by a manufacturing method according to an embodiment of the present invention.
10 is a photograph of the surface of the dustproof fabric obtained by the manufacturing method according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

The method of manufacturing the dustproof fabric according to the present invention is a method of forming a polyurethane coating layer of a non-swelling microporous type, which is thin and light and does not cause swelling phenomenon by moisture, by a dry direct coating method To a base fabric.

Specifically, the method for fabricating the dustproof fabric according to an embodiment of the present invention includes the steps of: (a) preparing a base fabric having conductive fibers and pulley-ester fibers interwoven with each other and having a weight of 75 g / yd to 120 g / yd; And (b) coating a polyurethane resin on the base fabric and heat-treating the polyurethane resin to form a polyurethane coating layer having a non-swellable porous type pore structure.

First, in step (a), a base fabric having conductive fibers and polyester fibers interwoven with each other and having a weight of 75 g / yd to 120 g / yd is prepared. The base fabric is a polyester fabric in which conductive yarns are arranged in a warp and weft direction at a predetermined interval. For example, polyester fabric of 50 to 150 denier and normal polyester fibers of 15 to 30 denier , Weaving with a warp density of 140 to 190 yarns / inch and a weft density of 80 to 130 yarns / in, and refining, marking and dyeing according to a conventional polyester filament dyeing processing method . Thereafter, the base fabric is subjected to water repellency treatment by impregnation using a fluorocarbon-based water repellent such as fluorocarbon or a copolymer such as perfluoroalkyl acrylate, and the base fabric subjected to water repellency treatment is heat-set by hot air at 120 to 180 ° C . Further, antistatic processing may be further performed on the base fabric.

The organizational structure of the base fabric is not particularly limited, such as basic organization such as plain weave, twill weave, runner weave, and modified weave structure such as change weave, change weave, change weave, etc. For example, down); 3 up and 2 down; 2 up, 1 down, 1 up, 1 down; Or 2 up, 1 down, 2 down, 1 down.

As the polyester yarn, a full draw yarn, a draw textured yarn, an air textured yarn, or an interlacing textured yarn may be used. The polyester yarn may be polyethylene terephthalate yarn, polytrimethylene terephthalate yarn, or polybutylene terephthalate yarn.

As the conductive material, nylon yarn or polyester yarn may be coated with conductive carbon on the surface thereof, or a composite yarn in which conductive carbon is embedded in the yarn.

The base fabric may be a fabric of reduced density of warp and weft yarns having a warp of 140T to 189T and a warp of 85T to 110T. In addition, the spacing of the conductive yarns on the base fabric can be adjusted according to the purpose, and may be about 0.3 cm to 1 cm in consideration of the weaving efficiency and the conductive performance. The base fabric may have a weight of 75 g / yd to 120 g / yd, preferably 100 g / yd to 120 g / yd.

A polyurethane coating layer is formed on the base fabric thus formed. That is, in step (b), a polyurethane resin is coated on the base fabric and dried at room temperature to form a polyurethane coating layer. Specifically, in step (b) of forming a polyurethane coating layer, first, b1) a first organic solvent and a second organic solvent (the boiling point of the first organic solvent, the second The boiling point of the organic solvent) is mixed to form a hydrophilic organic polyurethane organic solution.

Examples of the first and second organic solvents include methyl ethyl ketone, toluene, xylene, dimethylformamide (DMF), ethyl acetate, tetrahydrofuran, ethylene glycol monoethyl ether and ethylene glycol monoethyl ether acetate. A combination of species can be used. Among them, the first organic solvent is methyl ethyl ketone, and the second organic solvent is toluene, which is preferable in that a dense pore structure can be efficiently formed in the polyurethane coating layer.

In step b1), 10 to 16 parts by weight of the first organic solvent and 10 to 20 parts by weight of the second organic solvent may be mixed based on 100 parts by weight of the hydrophilic nonporous polyurethane resin.

Then, b2) the hydrophilic Unperforated polyurethane by addition of water (H ₂ 0) in an organic solution to form a hydrophilic polyurethane polymer structure Unperforated polyurethane composition which exists in a swollen state. The b2) phase of the water (H ₂ 0) and with b1), but the first and second mixture additionally an organic solvent used in step, and finally that the water weight in the hydrophilic Unperforated polyurethane composition of the first formed And the amount of water added may be adjusted to be greater than the total weight of the second organic solvent. For example, in step b2), a mixed solvent of 40 to 50 parts by weight of water and 5 to 10 parts by weight of the first organic solvent may be additionally added. If the solvent content is low, it is difficult to form uniform pores because the viscosity of the composition is high. If the solvent content is too high, the viscosity of the composition is too low to control the thickness precisely. Therefore, in step b1) and b2) Is preferably used. Also, if the content of water is lower than the content of the first and second organic solvents, swelling due to moisture is liable to occur during washing of the dustproof fabric finally obtained.

Subsequently, b3) the hydrophilic nonporous polyurethane composition is coated on the base fabric with a non-swelling microporous type coating amount of 2 to 10 g / m 2 and a thickness of 2 to 100 탆 to form a polyurethane coating . In the hydrophilic non-porous polyurethane composition, the polyurethane molecules are fixed in a state in which the polymer structure itself is previously swollen by contact with sufficient moisture, so that the polyurethane molecules are not swollen when they are in contact with water, to be. The coating of the polyurethane composition can be carried out, for example, by knife coating (for example, floating knife coating, doctor knife coating, knife overall coating, etc.), gravure coating, Coating, spray coating, calender roll coating or reverse coating. After drying at room temperature, the polyurethane coating layer may be formed in the form of a front coating, a dot coating, or a line coating.

Finally, b4) the polyurethane coating is heat-treated in three stages from the boiling point of the first organic solvent, the boiling point of the water and the boiling point of the second organic solvent, respectively, and the heat treatment is started from the lowest boiling point, Heat treatment is carried out in the order of finishing the heat treatment so that pores having a diameter of 0.01 to less than 1 탆 are contained in an amount of 1 to 15% and a pore having a diameter of 1 to 10 탆 is contained in an amount of 30% or more, for example, %, 30% to 80%, or 30% to 70%, and the average pore diameter is 1 占 퐉 to 20 占 퐉, for example, 2 占 퐉 to 18 占 퐉, 3 占 퐉 to 16 占 퐉, 4 占 퐉 to 14 占 퐉, Thereby forming a polyurethane coating layer having a porous type pore structure. Generally, in the manufacture of dustproof fabrics, a polyurethane resin is applied on the base fabric to form a coating layer. When the polyurethane coating layer has a non-porous structure, it has a high filtration efficiency with respect to fine particles, However, the nonporousness of the polyurethane coating layer deteriorates the air permeability on the one hand, thereby giving the wearer a considerably lowered feeling of comfort (deterioration in comfort) after being fabricated as a dustproof clothing. However, in one embodiment of the present invention, pores having various sizes formed by volatilizing solvents having different boiling points at three different temperatures by the above-described unique three-step heat treatment are used as the specific high-performance microporous polyurethane having dense pore density A coating layer can be formed. Accordingly, the dust-proof fabric obtained by the present invention has a micro-porous type having various pore sizes (pore average diameter 1 占 퐉 to 20 占 퐉) containing 1 to 15% of micropores having diameters of not less than 0.01 占 퐉 and less than 1 占 퐉 in the polyurethane coating layer By having the pore structure, unlike the dust-proof fabric obtained by the conventional dry coating method, the air-tightness of the fine particles generated in the human body is kept high while the comfort of the wearer is improved. At this time, since the polyurethane resin of the polyurethane coating layer has a non-swelling property, the swelling phenomenon due to moisture hardly occurs, so that the chemical resistance, peel strength of the coating layer, and washing durability can be improved. In addition, since the dustproof fabric manufactured according to one embodiment of the present invention is manufactured by the dry coating method, there is no problem of generating a large amount of wastewater, and the polyurethane coating layer is thin, so that the lightweight property is excellent.

In the present invention, it may be preferable from the viewpoint of process efficiency to use a polyurethane resin prepared by reacting a polyol, a chain extender, and a diisocyanate in a solvent in one step. As the polyol, polyester polyol (number average molecular weight 1,000 to 6,000) such as polyester polyol obtained by condensation polymerization of adipic acid and 1,4-butanediol, polyether polyol such as polyethylene glycol (PEG) To 6,000) and a polycarbonate-based polyol (number average molecular weight: 1,000 to 6,000).

As the chain extender, those commonly used in the art may be used, and although not particularly limited, it may be preferable to use a low molecular weight diol having an even number of repeating units which is advantageous for increasing the degree of crystallization. Specific examples of the solvent include ethylene glycol (EG), propylene glycol (PG), 1,4-butanediol (1,4-BD), 1,6- hexanediol, diethylene glycol, neopentyl glycol And the like. The amount of the chain extender is preferably 1 to 15 parts by weight, preferably 2 to 10 parts by weight, based on 100 parts by weight of the polyol. If it is used in an amount of less than 1 part by weight, heat resistance and adhesion may be deteriorated. If it is used in an amount exceeding 15 parts by weight, unreacted chain extender is excessively generated, which is uneconomical.

In the present invention, when a polyurethane resin is synthesized, a solvent may not be used. If a solvent is used to synthesize a polyurethane resin, the solvent commonly used in the art may be used. However, it may preferably contain at least one selected from DMF, ethyl acetate, tetrahydrofuran, ethylene glycol monoethyl ether and ethylene glycol monoethyl ether acetate. The amount of the solvent to be used is preferably 150 to 350 parts by weight, preferably 200 to 300 parts by weight, more preferably 250 to 300 parts by weight based on 100 parts by weight of the polyol. When the amount is less than 150 parts by weight, the viscosity may be too high to increase the molecular weight. When the amount is more than 350 parts by weight, it may be difficult to synthesize a polyurethane resin having a proper viscosity and molecular weight.

Examples of the diisocyanate include, but are not limited to, 4,4-diphenylmethane diisocyanate (MDI), modified MDI, toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI ), Isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (H ₁₂ MDI), and xylene diisocyanate (XDI). The amount of the diisocyanate to be used is not particularly limited as long as the NCO / OH ratio of the polyol and the diisocyanate is a commercially available ratio. For example, the diisocyanate may have a molar ratio of 5: 1 to 0.9: 1. For example, the amount of the diisocyanate to be used is preferably such that the NCO / OH ratio of the polyol and the diisocyanate is 0.95 to 1.05, preferably 1.0, from the viewpoint of increasing the molecular weight.

The polyurethane composition may include a pore-controlling agent, for example, an anionic surfactant and / or a nonionic surfactant to help form pores in the polyurethane coating layer. When a pore-forming agent is used, its amount to be used may be 100: 0.5 to 2 by weight, preferably 100: 0.5 to 1.5 by weight, based on the polyurethane resin.

The polyurethane composition may further comprise a pigment for imparting color to the polyurethane coating layer. When the pigment is used, the amount of the pigment to be used is preferably 100: 5 to 15: To 12 weight ratio. If the ratio is less than 5 parts by weight, it may be difficult to realize the color, and it may exceed 15 parts by weight and deteriorate the physical properties of the product.

In addition, the polyurethane composition may further include a coating surface anti-static agent commonly used in the art.

The polyurethane resin which can be preferably used in the present invention is a PEG having a number average molecular weight of 1,000 to 3,000 as a polyol in view of improvement of physical properties such as moisture permeability, water pressure, washing durability and hydrolysis resistance of the resulting dustproof fabric, 1000 PEG, at least one selected from EG, 1,4-BD, and NPG as chain extender, and TDI / MDI as a diisocyanate in a 6/4 molar ratio, Urethane resin. These hydrophilic nonporous polyurethane resins are distinguished from general hydrophobic polyurethane resins. Means a hydrophilic functional group derived from a hydrophilic component such as a low molecular weight PEG, for example, a polyurethane having a large amount of a hydroxyl group introduced into a molecular structure, as compared with a case where a general hydrophobic polyurethane resin does not absorb and diffuse water. This hydrophilic functional group absorbs water molecules and then transfers the hydrophilic functional groups to neighboring hydrophilic functional groups, so that water can be diffused.

An example of the method of synthesizing the hydrophilic nonporous polyurethane resin which can be used in the present invention is as follows. 1 to 15 parts by weight, preferably 2 to 10 parts by weight, of at least one chain extender selected from EG, 1,4-BD and NPG is mixed with 100 parts by weight of PEG having a number average molecular weight of 1,000 to 3,000 to prepare a polyol composition . And may be a hydrophilic nonporous polyurethane resin prepared by mixing a mixture obtained by mixing TDI / MDI with the polyol composition in a 6/4 molar ratio to proceed a urethane reaction. The amount of the TDI / MDI mixture used may be such that the NCO / OH ratio of the mixture of the polyol composition and the TDI / MDI ranges from 5: 1 to 0.9: 1. On the contrary, when PEG having a number average molecular weight of 1,000 to 3,000 is mixed with TDI / MDI at a rate of 6/4 mol, and the terminal group obtained by mixing isocyanate group-containing terminal group has at least one chain selected from EG, 1,4-BD and NPG Even if the urethane reaction is carried out by mixing the extender, a hydrophilic nonporous polyurethane resin can be obtained. The hydrophilic nonporous polyurethane resin may exhibit a viscosity of about 30,000 to about 100,000 cps at 25 ° C.

In step (b), a polyurethane coating layer having a non-swellable porous type pore structure is formed on the base fabric, and then a temperature of 100 to 180 DEG C and a surface tension of 40 m / Min to a drying rate of 60 m / min; And a nip pressure of 15 to 45 kgf / cm < 2 > and a treatment speed of 40 m / min to 60 m / min to improve the feel of the coated fabric And a step of obtaining an antivibration fabric having a polyurethane coating layer having a non-swellable porous type pore structure formed thereon.

Referring to FIG. 1, the dustproof fabric obtained by the manufacturing method according to an embodiment of the present invention includes: a base fabric 11 having conductive fibers and pulley-ester fibers bonded to each other; And a polyurethane coating layer (12) having a non-swellable porous type pore structure formed on the base fabric.

The base fabric is a polyester fabric in which conductive yarns are arranged in a warp and weft direction at predetermined intervals. For example, polyester fibers of 50 to 150 denier are arranged in a regular interval of 15 to 30 denier And a warp density of 140 to 190 yarns / inch and a weft density of 80 to 130 yarns / in. The base fabric has two up and one down; 3 up and 2 down; 2 up, 1 down, 1 up, 1 down; Or 2 up, 1 down, 2 down, 1 down. In this case, the polyester yarn may be a completely oriented yarn, a false twist yarn, an air texture yarn, or an interlaced texture yarn. The conductive yarn may be one obtained by coating conductive yarn on the surface of nylon or polyester yarn, Or the like may be employed. The base fabric may be a fabric of reduced density of warp and weft yarns having a warp of 140 to 189 T and a warp of 85 to 110T. In addition, the interval of the conductive yarns on the base fabric can be adjusted according to the purpose, and may be 0.3 to 1 cm in consideration of the weaving efficiency and the conductive performance. The base fabric may have a weight of 75 g / yd to 120 g / yd, preferably 100 g / yd to 120 g / yd.

The dot shape of the polyurethane coating layer 12 having the non-swellable porous type pore structure formed on the base may be arranged in an oblique line, a lattice or a pyramid shape. The diameter of the dots may be, for example, 1 탆 to 3 탆, and the spacing of the dots may be 1 탆 to 2 탆. As described above, when the diameter and the interval of the dots satisfy the above range, the durability and comfort of the dustproof fabric can be improved by providing the firm adhesion with the porous coating layer while maintaining the air permeability of the base fabric.

The polyurethane coating layer 12 has a thickness of about 2 탆 to 100 탆, for example, 2 탆 to 80 탆, 3 탆 to 70 탆, 4 탆 to 70 탆, 5 탆 to 70 탆, 10 탆 to 70 탆, Lt; RTI ID = 0.0 > um. ≪ / RTI >

The dustproof fabric may have an air permeability (OTR) of 0.5 to 2.0 cm3 / cm2 / s, preferably 0.5 to 1.5 cm3 / cm2 / s.

The dustproof fabric may have a moisture vapor transmission rate (WVTR) of 7,000 to 9,000 g / m 2/24 hr.

According to another aspect of the present invention, there is provided a wearable garment comprising a body covering a body portion of a human body, a lower body covering a leg portion of the body connected to the body, and a sleeve connected to the body to cover an arm portion of the body, And a garment made of a dustproof fabric as described above.

2A, the dustproof clothing according to an embodiment of the present invention includes an upper surface 21 covering the body portion of the human body, a lower body 21 integrally connected to the upper surface 21, 31) and a sleeve (41) connected to the upper surface (21) and covering the arms of the human body.

In addition, it is further possible to additionally provide an opening 22 for attaching or detaching the above-mentioned anti-vibration cloth to be formed on the back or front surface of the image 21, wherein the opening is generally a button or a zipper Refers to a portion formed so as to be opened and closed, which is formed in order to facilitate the wearing and unfolding of the garment including the dustproof clothing.

At this time, since the opening 22 is formed on the back surface of the image 21, a zipper or the like for opening and closing the opening and the opening is not formed on the front surface of the image 21, By suppressing the outflow of particles and the like from the human body through the openings as much as possible, it is possible to prevent contamination of the workpiece, such as a wafer, which is mainly located on the front surface of the worker.

A collar portion 51 may be provided at an upper end of the upper surface 21.

In addition, the undergarment 31 may be further provided with underpants, and the underpants may function to provide a pleasant feeling of comfort by increasing the comfort of the wearer wearing the anti-vibration clothing.

The gaits (23) can be further attached to the armpit portion between the sleeve (41) and the upper surface (21) of the above-described anti-vibration clothes. The term " gadget " as used herein refers to a cut piece of a fabric, such as a quadrangle, which is used to connect the armpit between the sleeve 41 and the upper face 21, which is a cutting term commonly used by clothing designers and forms a three- And it is possible to freely exercise the arm around the armpit. The goggles 23 are made of a tricot mesh structure, a stretchable band, or the like, so that the wearing feeling can be improved.

The sleeves 41 can be connected directly to the tops 21 to be integrally connected, which reduces the formation of seams as much as possible, thereby preventing the release of particles through the seams.

An elastic cuff 42 may be further formed on the end of the sleeve 41. The elastic cuff 42 closely contacts the end of the sleeve 41 of the wearable garment with the cuff of the wearer, To prevent the release of < / RTI > Alternatively, an elastic band can be inserted into the elbow 43 of the sleeve 41 to enhance the fit.

A waist tightening band 61 may be further attached between the upper face 21 and the lower side 31. The waist tightening band 61 may be an elastic spandex band so that the waist tightening band 61 can be used to easily attach and detach the dustproof clothing.

Referring to FIG. 2B, the hood 52 may be integrally fixed to the upper end of the upper surface 21 of the dustbin according to an embodiment of the present invention. The hood 52 functions to cover the head portion of the human body, thereby playing the role of a vibration damping protector for preventing particles from being emitted from the head portion, particularly, hair.

The hood 52 may be integrally fixed to an upper end of the upper surface 21 by an elastic hood connecting band 51 'and the elastic hood connecting band 51' ), And allows the free movement of the neck portion to facilitate the activity.

In addition, the elastic band can be inserted into the neck portion to prevent the hood fabric from coming out of the dustproof box when the hood 52 is worn.

Referring to FIGS. 3 and 4, a portion 82 or a front portion 81 of the rear portion of the image may be made of a stretchable material, according to an embodiment of the present invention.

As a result, while the worker wearing the anti-vibration clothes performs a variety of work operations to bow or straighten the waist, the back portion of the top can be stretched or contracted corresponding to the movement of the upper body of the worker, Can be further improved.

The stretchable material may be any kind of knitted or woven material capable of imparting stretchability without limitation, and may be, for example, a lightweight knitted fabric or a circular knitted fabric using polyurethane based elastic fibers.

5, in order to impart elasticity and comfort to the image, the rear portion of the image of the dustbin has elastic bands 72 to which both ends are fixed, And a wrinkle portion 71 having a predetermined width.

The elastic band 72 and the wrinkle portion 71 may be provided on the inside or outside of the rear portion of the image of the dustproof clothing. If the elastic band 72 and the wrinkle portion 71 are formed on the inner side of the rear face portion of the image of the vibration absorbing cloth as shown in Fig. 5, the wrinkle portion is formed on the outer side corresponding to the elastic band 72 and the wrinkle portion 71 as shown in Fig.

7 shows in more detail the portion where the elastic band 72 and the wrinkle portion 71 are formed. That is, when the wearer wears a garment according to an embodiment of the present invention, in a state where the elastic band is not elongated due to the movement of the upper body, the fold is bent (left figure), and when the elastic band is stretched The folded folded portion is unfolded (right drawing).

8 is a photograph showing a wearer wearing a dustproof garment according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

Example  One

For the warp and weft we used polyester filament yarn of 75/36 (denier / pillar), we used 20 denier of conductive yarn to have a spacing of 0.5 cm in both weft direction and weaving density was 147T The fabric was weaved with two-up and one-down twill weave with a water jet loom at a weft density of 100 T to prepare a base fabric. At this time, the surface resistance of the base fabric was 10 ⁷ to 10 ⁹ Ω, and the weight was 110 g / yd.

On this base fabric, a non-swellable porous type polyurethane coating layer was formed, the details of which are as follows.

First, 100 parts by weight of a hydrophilic non-porous polyurethane resin (manufactured by Cytec), 10 to 16 parts by weight of methyl ethyl ketone, 10 to 20 parts by weight of toluene and 6 parts by weight of a moisture control agent (trade name: OK- After mixing and stirring, the resultant was filtered.

Thereafter, a solvent obtained by mixing 40 to 50 parts by weight of water (H ₂ O) and 5 to 10 parts by weight of methyl ethyl ketone was added and the mixture was forcedly stirred together to prepare a polyurethane resin composition.

The prepared polyurethane resin composition was coated on the base fabric prepared above by a float knife method to form a polyurethane coating layer whose thickness of the polyurethane resin composition was adjusted to about 60 탆.

  The base fabric having the coating layer formed is subjected to a first heat treatment at 80 ° C. for 60 seconds, which is the boiling point of methyl ethyl ketone, to evaporate the methyl ethyl ketone. After heat treatment at a boiling point of 100 ° C. for 30 seconds, water is evaporated. Deg.] C for 30 seconds to evaporate the toluene to form a non-swellable polyurethane coating layer having a dense porous pore structure in the polyurethane coating layer.

At this time, the basic specifications of the polyurethane coating layer are shown in Table 1 below.

Viscosity (cP, 25 캜) 2,000 ~ 6,000 Solid content (%) 20 to 40 100% modulus (kgf / cm ² ) 29 Tensile strength (kgf / cm ² ) 165 Elongation (%) 450

From this, an anti-vibration fabric having a non-swellable polyurethane coating layer of porous type which develops a moisture permeability and a breathing function on a base fabric by a dry coating method in which a hydrophilic non-porous polyurethane resin is coated on a base fabric and heat- . 9A and 9B show SEM photographs of the surface of the porous polyurethane coating layer of the manufactured dustproof fabric. Fig. 10 shows a photograph of the surface of the manufactured dustproof fabric.

Comparative Example  One

For the warp and weft we used polyester filament yarn of 75/36 (denier / pillar), we used 20 denier of conductive yarn to have a spacing of 0.5 cm in both weft direction and weaving density was 147T The fabric was weaved with two-up and one-down twill weave with a water jet loom at a weft density of 100 T to prepare a base fabric. At this time, the surface resistance of the base fabric was 10 ⁷ to 10 ⁹ Ω, and the weight was 110 g / yd.

A porous polyurethane coating layer was formed on the base fabric, and the details thereof are as follows.

First, 100 parts by weight of a conventional polyurethane dry resin (Dongsung Chemical Co., trade name D-ACE 8301), 18 parts by weight of DMF, 50 parts by weight of methyl ethyl ketone and 6 parts by weight of a moisture- Were mixed and stirred, and the resultant was filtered to prepare a polyurethane resin composition.

The prepared polyurethane resin composition was coated on the base fabric prepared above by a float knife method to form a polyurethane coating layer whose thickness of the polyurethane resin composition was adjusted to about 60 탆.

The base fabric having the coating layer formed thereon was heat-treated at about 120 ° C for 60 seconds to form a non-swellable polyurethane coating layer having a porous pore structure in the polyurethane coating layer.

Thus, a vibration-proof fabric having a porous polyurethane coating layer that exhibits a moisture permeability and a breathing function on a base fabric was prepared by a dry coating method in which a conventional polyurethane dry resin was coated on a base fabric and heat-treated in one step.

Property evaluation

The air permeability, the collection efficiency, the moisture permeability, and the tumbler particle evaluation of the dustproof fabric prepared in Example 1 and Comparative Example 1 were evaluated by the following methods and shown in Table 2.

(1) Air permeability

The air permeability of the dustproof fabric was measured by the method of ASTM D 737, wherein the test head was 38.3 cm 2 and the applied pressure was 200 Pa.

(2) Collection efficiency

The dust collecting efficiency of the dustproof fabric was measured by the method of EN 1822. At this time, the airflow rate was 32.0 L / min, the test area was 100 cm 3, the particles used were 0.1 ㎛ and 0.3 ㎛ NaCl, the test equipment was TSI CERTITEST MODEL 8140.

(3) Water vapor permeability

The moisture permeability of the dustproof fabric was measured by ASTM E 96 method. The particles used were CaCl 2, Cup area 0.00283 m 2, height 23 mm, temperature 38 ± 2 ° C and humidity 90 ± 2% R.H.

(4) Evaluation of washing fastness

Wash fastness: Measured by KS K 0430 A1 method.

division Comparative Example 1 Example 1 Air permeability (cm3 / cm2 / s) 0 to 0.2 1.7 to 2.0 Collection efficiency (%) 84 85 Moisture permeability (g / m 2/24 hr?) 500 8,000 Wash fastness 3 to 4 4 to 5 Weight (g / yd) 110 110

From Table 2, it can be seen that the dustproof fabric obtained according to Example 1 according to the present invention is far superior in air permeability, collection efficiency, moisture permeability, and washing fastness to the dustproof fabric obtained in Comparative Example 1 according to the prior art.

Claims (9)

(a) preparing a base fabric having conductive fibers and pulley-ester fibers interwoven with each other and having a weight of from 75 g / yd to 120 g / yd; And
(b) coating a polyurethane resin on the base fabric and heat-treating the polyurethane resin to form a polyurethane coating layer having a non-swellable porous type pore structure,
(B) forming the polyurethane coating layer comprises:
b1) A first organic solvent and a second organic solvent (the boiling point of the first organic solvent and the boiling point of the second organic solvent) are mixed with a nonporous polyurethane resin to form a hydrophilic organic polyurethane organic solution step;
b2) forming a hydrophilic Unperforated polyurethane compositions by the addition of water (H ₂ 0) in the hydrophilic polyurethane Unperforated organic solution present in the polyurethane polymer structure swollen state;
b3) The hydrophilic nonporous polyurethane composition is coated on the base fabric with a non-swelling microporous type coating amount of 2 to 10 g / m < 2 &gt; and a thickness of 2 to 100 mu m to form a polyurethane coating step; And
b4) The polyurethane coating is heat-treated in three stages from the boiling point of the first organic solvent, the boiling point of the water, and the boiling point of the second organic solvent, respectively. The heat treatment is started from the lowest boiling point and the heat treatment is finished at the highest boiling point , Which comprises 1 to 15% of micropores having a diameter of 0.01 to less than 1 占 퐉, 30% or more of pores having a diameter of 1 to 10 占 퐉, and an average pore diameter of 1 to 20 Forming a polyurethane coating layer having a non-swelling porous type pore structure containing micropores having a specific surface area,
Wherein the method comprises the steps of: The method according to claim 1,
Wherein the first organic solvent is methyl ethyl ketone and the second organic solvent is toluene. The method according to claim 1,
The b2) above in the b1) step with the water (H ₂ 0) in step the first and second, but additionally mixed with an organic solvent, and finally that the water weight of the claim from the hydrophilic Unperforated polyurethane composition formed by 1 &lt; / RTI &gt; and the second organic solvent in an amount greater than the total weight of the first and second organic solvents. The method of claim 3,
10 to 16 parts by weight of the first organic solvent and 10 to 20 parts by weight of the second organic solvent are mixed in the step b1) based on 100 parts by weight of the hydrophilic nonporous polyurethane resin,
40 to 50 parts by weight of water and 5 to 10 parts by weight of the first organic solvent are further added in step b2). The method according to claim 1,
Wherein the coating of the polyurethane resin in the step (b) is performed by knife coating, gravure coating, coma coating, top coating, offset coating, spray coating or reverse coating. The method according to claim 1,
Wherein the polyurethane coating layer in the step (b) is formed as a porous front coating type, a dot shape, or a line shape. The method according to claim 1,
Wherein the ultimately obtained dustproof fabric has an air permeability (OTR) of 0.5 to 2.0 cm 3 / cm 2 / s. The method according to claim 1,
Wherein the finally obtained dustproof fabric has a moisture vapor transmission rate (WVTR) of 7,000 to 9,000 g / m &lt; 2 &gt; / 24 hours. (a) preparing a base fabric having conductive fibers and pulley-ester fibers interwoven with each other and having a weight of from 75 g / yd to 120 g / yd; And
(b) coating a polyurethane resin on the base fabric and heat-treating the polyurethane resin to form a polyurethane coating layer having a non-swellable porous type pore structure,
The step of forming the polyurethane coating layer comprises:
b1) mixing hydrophilic nonporous polyurethane resin with methyl ethyl ketone and toluene to form a hydrophilic organic polyurethane organic solution;
b2) forming a hydrophilic Unperforated polyurethane compositions by the addition of water (H ₂ 0) in the hydrophilic polyurethane Unperforated organic solution present in the polyurethane polymer structure swollen state;
b3) The hydrophilic nonporous polyurethane composition is coated on the base fabric with a non-swelling microporous type coating amount of 2 to 10 g / m &lt; 2 &gt; and a thickness of 2 to 100 mu m to form a polyurethane coating step; And
b4) The polyurethane coating is subjected to a first heat treatment in three steps at a boiling point of the methyl ethyl ketone, a boiling point of the water and a boiling point of the toluene, followed by a first heat treatment at 80 DEG C for 30 seconds to 90 seconds, And a third heat treatment is performed at 110 캜 for 15 seconds to 45 seconds for 1 to 15% of micropores having a diameter of at least 0.01 탆 and less than 1 탆, Forming a polyurethane coating layer having a non-swellable porous type pore structure containing micropores having 30% or more of pores having a diameter of 1 占 퐉 to 10 占 퐉 and having an average pore diameter of 1 占 퐉 to 20 占 퐉,
The b2) Step of water (H ₂ 0) and with the b1), but additionally mixed with the methyl ethyl ketone and the toluene used in step, and finally the formed hydrophilic Unperforated polyurethane composition in the water weight of the methyl acetate in the The amount of water added is controlled so as to be greater than the total weight of the ketone and the toluene,
In step b1), 10 to 16 parts by weight of the methyl ethyl ketone and 10 to 20 parts by weight of the toluene are mixed, based on 100 parts by weight of the hydrophilic nonporous polyurethane resin,
40 to 50 parts by weight of water and 5 to 10 parts by weight of methyl ethyl ketone are further added in step b2).

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