KR101876410B1 - An airpermeable and waterproof textile for the uppers of shoes - Google Patents

Abstract

The present invention relates to a fabric for air-permeable and water-resistant shoe upper which comprises a jacquard fabric composed of polyester, a nanofiber membrane, and a herringbone composed of nylon and polyester. In fabricating the nanofiber membrane, By using the electrospinning device including the temperature control device, electrospinning at a high temperature is possible, the production process using the existing thinner is simplified, the risk of explosion of the diluent is reduced, the diameter of the nanofiber membrane is kept constant, It is possible to increase the productivity of the nanofiber membrane by increasing the concentration of the solution and improve the quality of the nanofiber membrane by lowering the amount of residual solvent of the nanofiber membrane.

Description

Air permeable and waterproof fabric for shoe upper. {AN AIRPERMEABLE AND WATERPROOF TEXTILE FOR THE UPPERS OF SHOES}

The present invention relates to a fabric for a shoe upper which has air permeability and waterproof property, and a shoe upper which is superior in waterproof property than a conventional product by using a nanofiber membrane as a raw fabric for a shoe upper, It is about the fabric.

Upper, which is usually used for shoes, is called the upper, which means upper and upper parts of the shoes. It protects the shape and shape of appearance and protects the foot and joints. The basic items that the shoe upper should provide include bearing capacity, protection, ventilation, and lightness. There are many types of upper, such as mesh, leather, artificial leather, etc., and breathability is very important in the upper of the shoe. In addition to the breathability, the needs for shoes with both waterproof and ventilating functions have increased. Therefore, ventilation and waterproof materials have been used and applied to the upper.

It is an object of the present invention to provide a fabric for a shoe upper comprising a nanofiber membrane manufactured by electrospinning and having air permeability and waterproofness.

According to a preferred embodiment of the present invention, a jacquard fabric composed of polyester; Nanofiber membranes; And a herringbone composed of nylon and polyester. The airtight and waterproof fabric for a shoe upper is provided. Specifically, the nanofiber membrane is manufactured by electrospinning at a high temperature of 45 to 120 DEG C, the basis weight of the jacquard fabric is 500 to 600 g / yard2, and the basis weight of the herringbone is 130 to 150 g / m < 2 >. Wherein the herringbone is characterized in that the mixing ratio of nylon to polyester is 30:70 to 40:60, and the nanofiber membrane is one or more selected from the group consisting of polyurethane, polyvinylidene fluoride, and polyethylene terephthalate . The nanofiber membrane has a basis weight of 3 to 15 g / m 2, a thickness of 3 to 20 탆, an air permeability of 0.1 to 2 cm 3 / cm 2 / sec, a moisture permeability of 20,000 or less, The present invention provides a fabric for an air-permeable and waterproof shoe upper which is coated and laminated.

The nanofiber membrane used in the shoe upper fabric of the present invention can be electrospun at a high temperature by using an electrospinning device including a temperature control device, simplifying the production process using the existing thinner, and reducing the risk of explosion of the diluent It is possible to increase the productivity of the nanofiber membrane by increasing the concentration of the polymer solution according to the viscosity and to improve the quality of the nanofiber membrane by lowering the residual solvent amount of the nanofiber membrane.

In addition, by applying such a nanofiber membrane to a shoe upper, air permeability and water resistance are excellent.

1 is a diagram of an electrospinning apparatus having an overflow system used in the present invention.
Fig. 2 is a front sectional view showing a tubular body equipped with a coil-shaped heating wire in an electrospinning apparatus having a temperature control device used in the present invention.
3 is a cross-sectional view taken along the line A-A 'in FIG.
4 is a front sectional view showing a tubular body equipped with a linear heating wire in an electrospinning apparatus having a temperature control device according to the present invention.
5 is a cross-sectional view taken along line B-B 'of FIG.
6 is a front sectional view showing a tubular body equipped with a U-shaped pipe in an electrospinning apparatus having a temperature regulating device used in the present invention.
7 is a cross-sectional view taken along the line C-C 'in FIG.

Hereinafter, the present invention will be described in detail.

The air permeable and waterproof fabric for a shoe upper of the present invention comprises a jacquard fabric composed of polyester, a nanofiber membrane, and a herringbone composed of nylon and polyester.

First, jacquard fabrics are used in the case of fabrics that are close to the outer covering from the upper fabric used in the present invention. Jacquard refers to a fabric that is made by using yarns of various colors to squeeze the pattern and is not a printing form, so that even after washing, there is no damage to the pattern, and a complex pattern is expressed using a jacquard loom.

The jacquard fabric used in the present invention is preferably composed of 100% polyester, and the basis weight is preferably 500 to 600 g / yard2. When the basis weight is less than 500 g / yard 2, or when it exceeds 600 g / yard 2, the mechanical properties are deteriorated or too stiff to be used for the shoe upper. In the case of the present jacquard fabrics, it is preferable that two or more kinds of yarns used as weft yarns are combined. It is preferable that at least two yarns are used for warp yarns in order to express color due to the characteristics of the jacquard fabrics.

Below the jacquard fabric is a nanofiber membrane fabricated by electrospinning and below the nanofiber membrane is a herringbone lining. Herringbone means a fabric with a tissue effect resembling the bone of a herring, and means a twine with a pattern of fish bone or a pattern of arrows. The herringbone used in the present invention is characterized in that each yarn composed of nylon and polyester is mixed, and the mixing ratio of nylon and polyester yarn is 30:70 to 40:60. In the case where the mixing ratio is not 30:70 to 40:60, the proportion of nylon is increased, which leads to a problem of deteriorating physical properties of the lining support. The herringbone used in the present invention has a basis weight of 130 to 150 g / m < 2 >. When the weight of the herringbone is less than 130 g / m 2 or exceeds 150 g / m 2, Lt; / RTI > Also, it is possible to use a bristle treated herringbone, and it is also preferable to use a waterproofed one.

Meanwhile, the nanofiber membrane used in the present invention is characterized by being formed by electrospinning. Hereinafter, a nanofiber membrane manufactured using an electrospinning device will be described.

1. Electrospinning method with overflow system

The method of manufacturing a nanofiber membrane according to the present invention comprises an overflow system 200 for reusing a spinning solution that has been emitted from an electrospinning device 1 nozzle block 110 but has not been made into nanofibers.

Here, the electrospinning device 1 includes a case 102, a nozzle block 110, a collector 150, a power supply device 160 and an auxiliary belt device 170, and units 100 and 100 ' A second transfer pipe 216, a second transfer control device 218, a regeneration tank 230, and an overflow system 200 composed of the main storage tank 210, the second transfer pipe 216, the second transfer control device 218, and the regeneration tank 230.

At this time, it is preferable that the case 102 is made of a conductor, but the case 102 may be made of an insulator, or the case 102 may be applied with a conductor and an insulator mixedly used. It is possible.

The nozzle 42 of the nozzle block 110 can be a bottom-up type, a top-down type, and a bottom-up type. In particular, in an electrospinning apparatus to which the overflow system 200 is applied, bottom-up electrospinning is preferable. A plurality of nozzles 42 are arranged in a bottom-up, top-down, or horizontal manner and are supplied with the spinning solution from the main storage tank 210 or the regeneration tank 230. Hereinafter, the present invention will be described on the basis of bottom-up electrospinning, and the following bottom-up spinning is not intended to limit the scope of the present invention, but merely as an example, and various modifications are possible without departing from the technical gist of the present invention .

The tip of the nozzle 42 of the bottom-up electrospinning is preferably formed in a shape cut along a plane intersecting the axis of the cylinder with the axis of the cylinder. However, the tip of the nozzle 42 of a part of the nozzle block 110 has a trumpet- .

The collector 150 is disposed above the nozzle block 110 and is made of a conductor and is attached to the case 102 through an insulating member 152. It is also possible to remove the insulating member 152 when the case 102 is made of an insulator or when the upper part of the case 102 is used as an insulator and the lower part is used as a conductor.

The power supply unit 160 applies a high voltage between the nozzle 42 and the collector 150, which are vertically arranged in the nozzle block 110. The positive electrode of the power source device 160 is connected to the collector 150 and the negative electrode of the power source device 160 is connected to the nozzle block 110 through the case 102.

The nanofibers produced through the nozzles 42 for discharging the spinning solution of the nozzle block 110 from the discharge port toward the collector 150 in the upward direction are accumulated on the long sheet and move while maintaining a uniform thickness.

In this case, the electrospun nanofiber is a fiber having an average diameter of 50 to 1000 nm manufactured by spinning a synthetic resin material capable of electrospinning, and the synthetic resin material capable of electrospinning is not limited, but polypropylene (PP) , Polyethylene terephthalate (PET), polyvinylidene fluoride, nylon, polyvinyl acetate, polymethylmethacrylate, polyacrylonitrile (PAN), polyurethane (PUR), polybutylene terephthalate (PBT) (PVA), polyethylene naphthalate (PEN), polyamide (PA), polyvinyl alcohol (PVA), polyethyleneimine (PVA), polyvinyl butyral, polyvinyl chloride, polyethyleneimine, polyolefin, Polyethylene glycol (PEI), polycaprolactone (PCL), polylactic acid glyceric acid (PLGA), silk, cellulose and chitosan. Among them, polypropylene (PP) , Aromatic polyesters such as polyimide, polyamideimide, poly (meta-phenylene isophthalamide), polysulfone, polyether ketone, polyetherimide, polyethylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, Polyphosphazenes such as polytetrafluoroethylene, polydiphenoxaphospazene, and polybis [2- (2-methoxyethoxy) phosphazene], polyurethane copolymers including polyurethane and polyether urethane, Cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate propionate and the like are widely used commercially.

More preferably, it is one or more selected from the group consisting of polyurethane, polyvinylidene fluoride and polyethylene terephthalate.

First, polyurethanes are collectively referred to as polymer compounds bonded by an urethane bond formed by the combination of an alcohol group and an isocyanate group. Typically, there are spandex made of synthetic fibers, and urethane-based synthetic rubber is widely used. In other words, the polyurethane is collectively referred to as a polymer compound having a urethane bond (-NHCOO-) group during the repeating of the main chain. Such a polyurethane exhibits properties intermediate between polyamide and polyester, and hygroscopicity is smaller than that of polyamide and exhibits 1 to 1.5% at relative humidity of 65%. It has the advantages of abrasion resistance, chemical resistance, solvent resistance, aging resistance and oxygen stability.

On the other hand, polyvinylidene fluoride (PVDF) (hereinafter referred to as PVDF) is one of the fluorine-based polymers, and the fluororesin contains fluorine, which is excellent in thermal and chemical properties.

Reaction 1. Manufacture of PVDF

PVDF is prepared by the same process as in the above reaction formula 1, and has a melting point (177) and a density (1.78) lower than those of other fluororesin, and is cheap in chemical cost and low in unit cost. It is also used as an advanced paint for exterior walls.

In addition, PVDF is a representative organic material exhibiting piezoelectricity, and many studies have been conducted since the 1960s. In PVDF polymer, four kinds of crystals are mixed, and it can be divided into at least four types of α, β, γ and δ type depending on crystal form. Among them, β-type crystals of PVDF are filled with trans-type molecular chains in parallel, and all of the permanent dipoles of the monomers are aligned in one direction and exhibit large spontaneous polarization. This means that PVDF molecules are arranged regularly through stretching to impart piezoelectricity by giving anisotropy to the aggregated state. In order to improve such piezoelectric properties, various methods for increasing the? -Form crystal in the PVDF fiber have been studied.

Polyethylene terephthalate is also called PET (polyethylene terephthalate), which is a saturated polyester obtained by condensing terephthalic acid with ethylene glycol. Poly (ethylene terephthalate) is obtained by heating dimethyl and terephthalic acid at 150 to 230 ° C for ester exchange reaction to obtain bis (beta -hydroxyethyl) terephthalate. When bis (? -Hydroxyethyl) terephthalate is heated to 270 to 300 占 폚 at 1 torr or lower, polycondensation is carried out, and ethylene glycol is emitted to obtain PET. Another method of obtaining Bis (beta -hydroxyethyl) terephthalate is to react at about 230 [deg.] C while applying pressure to high purity terephthalic acid and ethylene glycol. Such polyethylene terephthalate is excellent in heat resistance, rigidity and electrical properties, and has an advantage that the extreme strength is slightly reduced even at a high temperature for a long time.

On the other hand, the spinning solution is prepared by dissolving the polymer in a solvent, and the type of the solvent is not limited as long as it can dissolve the polymer, and examples thereof include phenol, formic acid, sulfuric acid, m-cresol, Methyl isobutyl ketone, methyl ethyl ketone, aliphatic hydroxyl group, m-butyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, isopropyl alcohol, Hexane, tetrachlorethylene, acetone, propylene glycol, diethylene glycol, ethylene glycol as a glycol group, trichlorethylene as a group of halogen compounds, dichloromethane, aromatic compounds such as methylene chloride, Toluene, xylene, aliphatic cyclic compound groups such as cyclohexanone, cyclohexane and ester groups such as n-butyl acetate, ethyl acetate, Group ether group in salbeu, ethyl 2-butyl-cell-ethoxyethanol, may be used. Ethoxyethanol, dimethylformamide to, dimethylacetamide or the like 2 can be used a mixture of a plurality kinds of solvents. The spinning solution preferably contains an additive such as a conductivity improver.

The auxiliary belt device 170 is provided outside the collector 150. The auxiliary belt device 170 includes an auxiliary belt 172 rotating in synchronization with the conveyance speed of the long sheet, And an auxiliary belt driving device for driving the auxiliary belt driving roller 174 and the auxiliary belt 172.

At this time, it is preferable that the auxiliary belt roller 174 rotates the auxiliary belt 172 by the auxiliary belt driving device, but it is also possible to use a roller having a low friction coefficient to assist in transferring the long sheet without a separate driving device It is possible.

The main storage tank 210 stores a spinning solution to be a raw material of the nanofibers. The main storage tank 210 is provided therein with a stirring device 211 for preventing separation or coagulation of the spinning solution.

The second transfer pipe 216 is composed of a pipe connected to the main storage tank 210 or the regeneration tank 230 and a valve 233. The second transfer pipe 216 is connected to the main storage tank 210 or the regeneration tank 230, And transfers the spinning liquid to the tank 220.

The second conveyance control device 218 controls the conveyance operation of the second conveyance pipe 216 by controlling the valves 212, 213 and 214 of the second conveyance pipe 216. The valves 212, 213 and 214 control the transfer of the spinning liquid from the main storage tank 210 to the intermediate tank 220 and control the transfer of spinning liquid from the regeneration tank 230 to the intermediate tank 220, And controls the amount of the spinning solution flowing into the intermediate tank 220 from the main storage tank 210 and the regeneration tank 230.

The control method as described above is controlled according to the liquid surface height of the spinning solution measured by the second sensor 222 provided in the intermediate tank 220 to be described later.

The intermediate tank 220 stores the spinning solution supplied from the main storage tank 210 or the regeneration tank 230, supplies the spinning solution to the nozzle block 110, and measures the level of the supplied spinning solution And a second sensor 222 are provided.

The second sensor 222 may be a sensor capable of measuring the liquid level height, and is preferably formed of, for example, an optical sensor or an infrared sensor.

A supply pipe 24 and a supply control valve 242 for supplying a spinning solution to the nozzle block 110 are provided in the lower part of the intermediate tank 220. The supply control valve 242 is connected to the supply pipe 240 And the like.

The regeneration tank 230 includes a stirring device 231 for storing the recovered circulating fluid and preventing separation or coagulation of the circulating fluid, and a first sensor (not shown) for measuring the liquid level of the recovered circulating fluid 232.

The first sensor 232 may be a sensor capable of measuring the liquid level height, and is preferably formed of, for example, an optical sensor or an infrared sensor.

On the other hand, the spinning solution overflowed in the nozzle block 110 is recovered through the spinning solution recovery path 250 provided below the nozzle block 110. The spinning solution recovery path 250 recovers the spinning solution to the regeneration tank 230 through the first transfer pipe 251.

The first transfer pipe 251 is provided with a pipe and a pump connected to the regeneration tank 230 and the spinning liquid is transferred from the spinning solution recovery path 250 to the regeneration tank 230 by the power of the pump .

At this time, it is preferable that at least one of the regeneration tanks 230 is provided, and when there are two or more, the first sensor 232 and the valve 233 may be provided in plurality.

When the number of the regeneration tanks 230 is two or more, a plurality of valves 233 located above the regeneration tank 230 are also provided, so that a first transfer control device (not shown) The control unit controls at least two valves located at the upper part in accordance with the height of the liquid level of the first sensor 232 to control whether the spinning liquid is to be transferred to one of the plurality of regeneration tanks 230. [

2. Temperature control system of polymer solution (polymer)

A polymer solution is used for electrospinning. Generally, the existing inventions have a diluting agent and concentration adjusting devices to keep the concentration of the polymer solution constant. MEK (methyl ether ketone), THF (tetrahydrofuran), and alcohol are used as the diluent. The concentration of the polymer solution recovered through the overflow system 200 in addition to the polymer solution that is electrospun through the nozzle block 110 and accumulated in the collector 150 is determined by the concentration of the polymer solution initially supplied from the main storage tank 210 In the conventional electrospinning, a diluent is added to maintain the concentration of the polymer solution at a certain level. In addition, MEK or THF used as a diluent has low boiling point (b.p) (about 60 ° C) and is more easily scattered than the case of using DMAc alone as a solvent during electrospinning, so nanofiber formation is easy.

However, in the present invention, instead of maintaining the concentration constant, the high-concentration polymer solution to be reused is used again after the overflow, and the viscosity of the polymer solution is controlled to be constant using the temperature control device 60 to increase the efficiency of electrospinning And it is easy to form nanofibers of the polymer solution because of its high acidity at high temperature conditions for controlling high viscosity without using a diluent. The temperature control device 60 of the present invention is capable of measuring the viscosity of the polymer solution and controlling the radiation temperature accordingly.

The viscosity refers to the ratio of the skew stress and the skewness rate of solute and solvent in the flowing liquid. In general, it is expressed in terms of the point dryness per cutting area, and the unit is dynscm-2gcm-1s-1 or poise (P). The viscosity decreases in inverse proportion to the temperature rise. If the viscosity of the solution is higher than the viscosity of the solvent, the flow of the liquid is distorted depending on the solute, and the flow rate of the liquid is lowered by the amount.

The viscosity of the solution is measured at various solution concentrations and extrapolated to a concentration of 0, and the relationship between the intrinsic viscosity (?) And the molecular weight M of the substance can be expressed as (?) = KMa. In this case, K, a is an integer depending on the type of solute or solvent and the temperature. Therefore, the viscosity value is affected by the temperature, and the degree of the change depends on the type of fluid. Therefore, when talking about viscosity, the values of temperature and viscosity should be specified.

When fabricating the nanofiber with the electrospinning device 1, the fiber diameter and radioactivity of the nanofiber produced, such as the type of polymer and solvent used, the concentration of the polymer solution, the temperature and humidity of the spinning room, And the like. That is, the physical properties of the polymer (polymer solution) emitted from electrospinning are important. It has been considered that it is usually necessary to maintain the viscosity of the polymer at or below a predetermined viscosity at the time of electrospinning. This is because the higher the viscosity is, the more the nano-sized fibers are not radiated smoothly through the nozzle 42. If the viscosity is higher, the nano-sized fibers are not suitable for fiberization by electrospinning.

The present invention is characterized in that it includes a temperature control device 60 for controlling the viscosity with the temperature control device 60 to maintain fiber viscosity suitable for electrospinning as described above.

As the temperature control device 60, it is possible to use a heating device capable of keeping the viscosity of the high-viscosity polymer solution reused through the overflow low and a cooling device capable of keeping the viscosity of the polymer solution having a relatively low viscosity high, .

In the temperature in the electrospinning region, the temperature of the region where the electrospinning occurs (hereinafter, referred to as the 'radiating region') changes the surface tension of the spinning solution by changing the viscosity of the spinning solution, . ≪ / RTI >

That is, when the temperature of the radiation region is relatively high, the nanofiber having a relatively small fiber diameter is produced when the viscosity of the solution is low, and the nanofiber having relatively large fiber diameter is produced when the viscosity of the solution is relatively high because the temperature is relatively low.

The concentration measuring device for measuring the concentration has a contact type and a non-contact type in direct contact with a solution, and a capillary type concentration measuring device and a disk (DISC) type concentration measuring device can be used as a contact type. A concentration measuring device using the infrared or a concentration measuring device using infrared can be used.

The heating device of the present invention may be an electric heater, a hot water circulating device, a hot air circulating device, or the like. In addition, devices capable of raising the temperature in the same range as the above devices can be borrowed.

As an example of the heating device, the electro-thermal heater may be used in the form of a hot wire, and coil-shaped hot wires 62a and 62b may be mounted inside the tube 43 of the nozzle block 110, (See Figs. 3 to 8).

It is also possible to have the configuration of the linear heat lines 62a and 62b and the U-shaped pipe 63.

The heating device includes a nozzle block 110 through which the polymer solution is radiated, a tank (main storage tank, intermediate tank or regeneration tank) and an overflow system 200 (in particular, a tank And a transfer pipe).

The cooling device of the present invention may be a cooling device including a chilling device, and the means for maintaining a constant viscosity of the polymer solution is usually applicable. The cooling device may be provided in at least one of the nozzle block 110, the tank, and the overflow system 200 in the same manner as the heating device, and is used to maintain a certain viscosity of the polymer solution.

In addition, the temperature control device 60 of the present invention includes a sensor for measuring the concentration and a temperature control unit (not shown) for controlling the temperature accordingly.

The sensor is installed in the main storage tank 210, the intermediate tank 220, the regeneration tank 230, the nozzle block 110 or the overflow system 200 to measure the concentration of the flushing liquid in real time, The heating device and / or the cooling device is operated so that the viscosity is kept constant in the device 60. [

The concentration of the polymer solution re-supplied through the overflow system 200 of the present invention is 20 to 40%, which is a high concentration solution compared to the concentration of the polymer solution used in conventional electrospinning of 10 to 18%.

In addition, the temperature of the polymer solution according to the concentration of the polymer solution is adjusted to 45 to 120 캜, rather than the room temperature, in order to maintain the viscosity of the polymer solution to be supplied again.

Meanwhile, the viscosity of the polymer solution of the present invention is preferably 1,000 to 5,000 cps, more preferably 1,000 to 3,000 cps. If the viscosity is 1,000 cps or less, the quality of the nanofibers to be electrospun is poor, and if the viscosity is 3,000 cps or more, the polymer solution can not be easily discharged from the nozzle 42 during the electrospinning, resulting in a slow production rate.

In the present invention, since the viscosity of the polymer solution is constant as the electrospinning progresses, the ease of spinning during electrospinning is excellent, and the concentration of the polymer solution is increased. As a result, the amount of solids in the nanofibers accumulated in the collector increases, There is an increasing effect.

In addition, the amount of the residual solvent of the nanofibers using electrospinning is lower than that of the conventional electrospinning, and thus it is possible to produce nanofibers of excellent quality.

The temperature control device 60 of the present invention measures the viscosity of the polymer solution through the temperature control of the nozzle block 110 or the main storage tank 210 by measuring the concentration of the intermediate tank 220 in an off- Which can be controlled manually, and which can automatically control the temperature of the solution according to the concentration measurement through an automatic control system on-line.

Hereinafter, a method for fabricating nanofibers using electrospinning electrospinning will be described in which a temperature control device 60 is provided to maintain the viscosity constant. However, the following production method is only one production method of the present invention, and the scope of the present invention is not limited thereto.

The nanofiber manufacturing method includes a supplying step in which the polymer solution is supplied from the main storage tank 210 storing the polymer solution to the nozzle block 110. At this time, the polymer solution introduced into the main storage tank 210 may be variously used as the polymer solution described above.

The polymer solution supplied from the main storage tank 210 to the nozzle block 110 includes an electrospinning step of electrospinning to the collector 150 through the nozzle 42 to laminate the nanofiber layers. In the electrospinning step, the distance between the nozzle block 110 and the collector 150 is adjusted to 20 to 50 cm on average, the applied voltage is controlled to 10 to 40 kV, and the flow rate, temperature and humidity of the polymer solution It can be set in a normal range.

Only 30% to 10% of the polymer solution electrospun in the nozzle block 110 in the electrospinning step becomes nanofiber, and the remaining 70 to 90% of the polymer solution can not be nanofiberized. The polymer solution, which is not nanofiberized, is collected through the recovery tank 230 through the overflow system 200 and collected.

The polymer solution stored in the regeneration tank 230 may then be re-supplied to the nozzle block 110. In addition, the polymer solution may be introduced into the regeneration tank 230 from the main storage tank 210, And may be re-supplied to the nozzle block 110 through the storage step to be stored.

Thereafter, the polymer solution is supplied from the regeneration tank 230 to the nozzle block 110 again. At this time, the temperature control device 60 is attached to the nozzle block 110 to adjust the viscosity of the polymer solution uniformly. Respectively. The temperature control device 60 may be installed in any one of the overflow system 200 and the regeneration tank 230 or the main storage tank 210 as well as the nozzle block 110.

Preferably, the nanofiber membrane has a basis weight of 3 to 15 g / m < 2 > and a thickness of the nanofiber membrane is 3 to 20 m. If the basis weight is less than 3 g / m < 2 > or the thickness is less than 3 mu m, the mechanical properties are deteriorated. If the basis weight exceeds 15 g / m 2 or the thickness exceeds 20 m, the properties of air permeability and waterproofness are deteriorated. The air permeability of the nanofiber membrane produced by the present invention is preferably 0.1 to 2 cm 3 / cm 2 / sec and the moisture permeability is 20,000 or less.

* The nanofiber membrane manufactured as above is composed of 3 layers between jacquard fabrics and herringbone to finally produce 3 layer fabrics for shoe upper. Here, it is also possible that an adhesive is applied to one side or both sides of the nanofiber membrane constituting the intermediate layer of the three-layer fabric and laminated.

The adhesive may be applied by applying a low-melting-point polymer or an adhesive, or alternatively, a material used as an adhesive may be separately electrospun.

Hereinafter, a method of fabricating a nanofiber membrane according to an embodiment of the present invention and a fabric for a shoe upper comprising the nanofiber membrane will be described.

Preparing a jacquard fabric and a herringbone respectively, fabricating a nanofiber membrane through electrospinning, laminating the jacquard fabric and the herringbone on both sides of the nanofiber membrane; And laminating the laminated laminated body to produce a fabric for a shoe upper.

The step of preparing the nanofiber membrane is characterized in that the nanofiber membrane is prepared by electrospinning at a high temperature of 45 to 120 DEG C, and the polymer constituting the nanofiber membrane may be polyurethane, polyvinylidene fluoride or polyethylene terephthalate And at least one kind selected from the group consisting of

Since the fabric for the shoe upper manufactured as described above is used as a shoe upper, it is suitable to be used as a shoe fabric because it satisfies the waterproof property and the air permeability at the same time.

Hereinafter, embodiments of the present invention will be described in more detail. However, the embodiments are only examples of the present invention, and the scope of the present invention is not limited thereto.

[Example 1]

20% by weight of polyurethane was dissolved in 80% by weight of a solvent of N-N-dimethylacetamide (DMAc) to prepare a spinning solution having a concentration of 20% and a viscosity of 1000 cps. Thereafter, the spinning liquid was moved from the raw material tank to the nozzle block, and then the distance between the nozzle block and the collector was 20 cm, the applied voltage was 15 kV, the spinning liquid flow rate was 0.1 mL / h, the temperature was 50 ° C, and the humidity was 50%. Thereafter, the concentration of the spinning solution in the raw material tank was changed to 25% in the course of providing the spinning solution which was not radiated through the spinning process and overflowed to the raw material tank which is one of the storage tanks again, and the viscosity was changed to 2000 cps . Thereafter, in order to lower the viscosity to 1000 cps, the temperature of the nozzle radiated by the temperature control device was raised to 65 DEG C, and then electrospun on the support to obtain a nanofiber membrane. The basis weight of the nanofiber membrane prepared here was 7 g / m 2 and the thickness was 14 μm. On one side of the nanofiber membrane, a jacquard fabric with 100% polyester, a basis weight of 585 g / yard2 and a width of 59 inches was placed. The warp of the jacquard fabric was polyester 150D / 48F and the yarn was a mixed yarn composed of three polyester 600D / 192F DTY SD. On the other side of the nanofiber membrane, a nylon 70 denier yarn and a polyester 75 denier yarn are placed at a mixing ratio of 35:65. Wherein the herringbone had a basis weight of 140 g / m 2 and a width of 64 inches. The jacquard fabric and the herringbone were placed on both sides of the nanofiber membrane as described above, and the laminated laminate was laminated to fabric the shoe upper fabric.

[Example 2]

A fabric for a shoe upper was prepared in the same manner as in Example 1 except that the polyurethane used as a spinning solution was changed to polyvinylidene fluoride.

[Example 3]

A fabric for shoe upper was prepared in the same manner as in Example 1, except that the polyurethane used as the spinning solution was changed to polyethylene terephthalate.

[Example 4]

A fabric for a shoe upper was prepared in the same manner as in Example 1, except that an epoxy adhesive was applied to both sides of the nanofiber membrane and the laminated laminate was laminated by placing the jacquard fabric and herringbone.

[Comparative Example 1]

A fabric for a shoe upper was prepared in the same manner as in Example 1, except that a polytetrafluoroethylene film having a thickness of 14 μm was used in place of the nanofiber membrane.

Air permeability and moisture permeability of the fabric for shoe upper fabric manufactured by Examples and Comparative Examples were measured.

1. Measurement of air permeability

Air permeability was measured with a gas permeance analyzer (GPA-2001, B, S Chem. Co., LTD).

2. Measurement of moisture permeability

The moisture permeability was measured according to JIS L1099A-1.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Air permeability (cm3 / cm2 / sec) 2 0.9 0.6 0.2 - Water vapor permeability (mmH2O) 10000 13500 12000 9500 25000

Thus, Examples 1 to 4 of the present invention can simplify the production process using existing diluents, reduce the risk of explosion of the diluent, increase the spinning temperature by increasing the spinning temperature, and increase productivity of nanofiber membrane manufacturing And the fabrics for the shoe upper including the fabricated nanofiber membranes were excellent in air permeability, whereas the comparative example was unable to measure the air permeability. The water vapor permeability is lower than that of the comparative example in that the water vapor permeability is more excellent.

As described above, the fabric of the shoe upper according to the present invention is not limited to the configuration and method of the embodiments described above, but the embodiments can be applied to all or part of the embodiments so that various modifications can be made. Some of which may be selectively combined.

1: electrospinning device, 42: nozzle,
43: tube 60: temperature control device,
62a, 62b: heat line 63: pipe,
100, 100 ': unit, 102: case,
110: nozzle block, 150: collector,
152: insulating member, 160: power supply unit,
170: auxiliary belt device, 172: auxiliary belt,
174: Roller for auxiliary belt, 200: Overflow system,
210: main storage tank, 211: stirring device,
212: valve, 213: valve,
214: valve, 216: second transfer pipe,
218: second conveyance control device, 220: intermediate tank,
222: second sensor, 230: regeneration tank,
231: stirring device, 232: first sensor,
233: valve, 240: supply piping,
242: supply control valve, 250: circulating fluid recovery path,
251: First transfer piping.

Claims (7)

A jacquard fabric composed of polyester;
A nanofiber membrane laminated on the jacquard fabric; And
A fabric for a shoe upper which is laminated on said nanofiber membrane and comprises a herringbone consisting of nylon and polyester,
The basis weight of the jacquard fabric is 500 to 600 g / yard ² ,
The herringbone is the mixing ratio of nylon and polyester 30:70 to 40:60, the basis weight is from 130 to 150g / m ^2,
Wherein the nanofiber membrane is one or more selected from the group consisting of polyurethane, polyvinylidene fluoride and polyethylene terephthalate, the basis weight is 3 to 15 g / m ² , the thickness is 3 to 20 탆,
Wherein the shoe upper has an air permeability of 0.1 to 2 cm ³ / cm ² / sec and a moisture permeability of 20,000 mmH ₂ O or less.
The method according to claim 1,
Wherein the nanofiber membrane is manufactured by electrospinning at a high temperature of 45 to 120 DEG C, and the air permeable and waterproof fabric for a shoe upper.
delete delete delete delete The method according to claim 1,
Characterized in that an adhesive is applied and laminated on one or both sides of the nanofiber membrane, and the fabric is air permeable and waterproof.

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