KR101721992B1 - The method of making nanofiber-maskpack with MD-direction different basis weights - Google Patents

Abstract

The present invention relates to a method of manufacturing a mask pack, which can manufacture a mask pack having a nanofiber layer having different basis weights in the longitudinal direction, thereby preventing the mask pack from being detached, It is possible to produce a mask pack having a high impregnation efficiency of a moisturizing component and various nutritional components and an excellent diffusion effect of nutrients through the skin.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a mask pack including nanofibers having different weights in the longitudinal direction,

The present invention relates to a method of manufacturing a mask pack, and more particularly, to a mask pack comprising a substrate and a nano fiber layer, wherein the nano fiber layer has a basis weight different in the longitudinal direction .

As society is modernized, interest in the environment, welfare, and health is increasing, and interest in health is increasing day by day due to increase in income.

Recently, environmental pollution caused by industrialization has caused a sudden increase in atopic skin patients and side effects such as skin damage due to exposure to ultraviolet rays due to destruction of the ozone layer.

Therefore, in order to remove wastes from damaged skin as described above, or to remove unnatural substances such as cucumber, citrus, aloe, carrot, wormwood, seaweed, carrot, ginseng, red ginseng, Potatoes, cacti, mesyl, vitamins, etc.) and minerals (elvan) have already been commercialized and marketed.

A mask pack is a cosmetic product that replenishes the skin's physiological functions by covering the skin such as the face and supplying moisture and cosmetic ingredients to the skin to clean and make the skin beautiful. Such a mask pack is manufactured by impregnating synthetic fibers such as nonwoven fabric with various nutritional ingredients suitable for skin-beauty, as disclosed in the patent document 10-2011-0122473, and exhibits a skin-beauty effect by being attached to the face for a predetermined time.

In recent years, a nanofiber layer has been widely used for manufacturing mask packs. The nanofiber layer has a small diameter, has good skin adhesion, has a high impregnation efficiency with respect to moisturizing and various nutrients, and has an excellent spreading effect of nutrients through the skin.

The nanofiber layer is usually carried out by electrospinning. For this purpose, a specific polymer solution is electrospun due to the constitution of a unit for electrospinning and a nozzle and a nozzle block installed in the unit, And a fibrous layer is laminated.

At this time, the nanofiber layer laminated on the substrate by electrospinning is more effective in filtering foreign matter if it is manufactured so that the concentration of the polymer solution per unit area, that is, the basis weight, differs depending on the concentration of the pollutant and the degree of generation of foreign matter. However, in the conventional nanofiber filter, since the polymer solution is uniformly electrospun in the formation of the nanofiber layer, it is inevitable that the polymer solution is over-used and the production cost increases accordingly. In addition, the problem of environmental pollution caused by the use of excessive solvent was inevitable.

However, there has not yet been studied a method of manufacturing a mask pack using a polymer nanofiber layer having different basis weights in manufacturing a mask pack.

Disclosure of the Invention The present invention has been conceived in order to solve the above problems, and it is an object of the present invention to provide a mask pack in which a nanofiber layer is stacked, in which the basis weight, i.e., the nano- It is an object of the present invention to provide a method of manufacturing a mask pack in which a fibrous layer is laminated.

In order to solve the above problems,

In the method of manufacturing a mask pack,

Wherein the mask pack comprises a substrate and a plurality of nanofiber layers,

Wherein the nanofiber layer is formed by electrospinning a polymer solution with different weights from each other. The present invention also provides a method for manufacturing a mask pack.

At this time, the bonding between the substrate and the nanofiber layer and the nanofiber layer is carried out through an adhesive layer formed by electrospinning a low melting point polymer solution selected from at least one of a low melting point polyester, a low melting point polyvinylidene fluoride and a low melting point polyurethane .

Characterized in that the electrospinning of the low melting point polymer solution is carried out on a part or whole of the base material and the nano fiber layer,

The polymer for forming the nanofiber layer is selected from a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer.

The hydrophilic polymer is selected from any one of polyacrylonitrile, polyvinyl alcohol, polyamide, and hydrophilic polyurethane,

The hydrophobic polymer is selected from polyvinylidene fluoride, a low-melting-point polyester, and a hydrophobic polyurethane,

The heat-resistant polymer may be selected from polyamic acid, meta-aramid, and polyethersulfone.

According to the present invention, there is an advantage that it is possible to prevent separation and to produce an economical and inexpensive mask pack.

1 is a side view schematically showing an electrospinning apparatus according to the present invention;
Fig. 2 is a plan view schematically showing the connection relationship with other components of the nozzle provided in the spinning solution unit of the present invention. Fig.
Fig. 3 is a plan view of a nozzle block provided in the low melting point polymer unit of the present invention
Fig. 4 is a plan view showing a process of electrospinning work according to the arrangement of the nozzle blocks as shown in Fig.
5 is a plan view showing a work process in which the basis weight of the polymer is electrospunctured in the MD direction according to the operation of the nozzle in the spinning solution unit

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the scope of the present invention, but is merely an example, and various modifications can be made without departing from the technical spirit of the present invention.

1 is a side view schematically showing an electrospinning apparatus according to the present invention. 1 is a side view schematically showing an electrospinning apparatus according to the present invention as illustrated. As shown in the figure, the electrospinning apparatus 1 according to the present invention comprises a bottom-up electrospinning apparatus 1, in which at least one low-melting polymer unit 10a and a spinning solution unit 10b are spaced apart from each other by a predetermined interval The low melting point polymer unit 10a and the spinning liquid unit 10b are manufactured by electrospinning a low melting point polymer or a polymer spinning solution separately.

The low-melting-point polymer unit and spinning solution unit may include a main tank 8 in which a low-melting-point polymer or a polymer solution is filled, and a low-melting-point polymer or polymer solution filled in the main tank 8 in a predetermined amount A nozzle block 11 for discharging a low-melting-point polymer or a polymer solution for filling the inside of the main tank 8 and having a plurality of nozzles 12 arranged in a pin shape; And a voltage generator 14a and 14b for generating a voltage to the collector 13 and a collector 13 spaced apart from the nozzle 12 by a predetermined distance in order to accumulate the polymer spinning solution injected from the nozzle 12, .

The electrospinning device 1 according to the present invention has a structure in which a low melting point polymer or a polymer spinning liquid filled in the main tank 8 is supplied to a plurality of nozzles (not shown) formed in the nozzle block 11 through a metering pump 12 and the supplied low melting point polymer or polymer spinning liquid is radiated and focused on a collector 13 having a high voltage applied thereto through a nozzle 12 to be transported on the collector 13 15), and the formed nanofiber nonwoven fabric is made of a filter or a nonwoven fabric.

The low-melting-point polymer solution of the present invention is prepared by mixing at least one low-melting-point polyester, a low-melting-point polyurethane and a low-melting polyvinylidene fluoride into a main tank in order to form an adhesive layer for bonding between the substrate, The selected low melting point polymer solution is stored.

In the spinning solution unit of the present invention, a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer solution are selectively stored in the main tank.

The hydrophilic polymer is selected from polyacrylonitrile, polyvinyl alcohol, polyamide, and hydrophilic polyurethane.

The hydrophobic polymer is selected from any one of polyvinylidene fluoride, low melting point polyester, and hydrophobic polyurethane.

The heat-resistant polymer is preferably selected from polyamic acid, meta-aramid, and polyethersulfone.

2 is a plan view schematically showing a connection relationship with other components of the nozzle provided in the spinning solution unit of the present invention. As shown in the drawing, the nozzles 12 are arranged in a line along the nozzle tube 40, and the spinning solution can be electrospun from the nozzle 12 over the entire surface of the substrate.

3 is a layout diagram of a nozzle block installed in the low melting point polymer unit of the present invention. The nozzle arranged in the low melting point polymer unit may be applied to the front face portion of the substrate, but is preferably applied to a specific portion of the substrate if necessary. In Fig. 3, the nozzles are divided into five groups of nine nozzles, one at the center and two at the bottom in the upper part. However, the arrangement of the nozzle and the nozzle block is not limited thereto, and it is obvious that those skilled in the art can appropriately design, change and arrange the nozzle in consideration of the number of the nozzles and the amount of the low melting point polymer to be radiated.

FIG. 4 is a plan view showing the electrospinning process according to the arrangement of the nozzle blocks shown in FIG. 3. The nozzle tubes 112a, 112b, 112c, and 112d are formed in a rectangular parallelepiped shape and have a plurality of nozzles linearly arranged on the top surface thereof. 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i, 112e, 112f, 112g, 112h, 112i are arranged on the nozzle block in the length and the longitudinal direction of the substrate, Is connected to the spinning liquid main tank 8 and supplied with the polymer spinning solution filled in the spinning liquid main tank 8.

The nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i are connected to the spinning liquid main tank 8 through a supply pipe 240, A plurality of nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i and a spinning liquid main tank 8 are branched.

At this time, the supply piping 240, which is communicated to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i in the spinning liquid main tank 8, And the supply amount adjusting means comprises valves 212, 213, 214, and 233.

The valves 212, 213, 214 and 233 are connected to the supply pipe 240 which is communicated to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i in the spinning liquid main tank 8, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 8 by the respective valves 212, 213, 214, 233, Is controlled by an on-off system in which the supply of the polymer solution is controlled and controlled.

That is, when the polymer spinning solution is supplied to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 8 through the supply pipe 240, The opening and closing of the valves 212, 213, 214 and 233 provided in the supply pipe for supplying the main tank 8 and the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, The nozzle tubes 112b, 112d, 112f, 112g, 112h, 112i, 112f, 112g, 112h, 112i at specific positions among the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112b, 112c, 112d, 112e, 112e, 112c, 112d, 112e, 112e, 112e, 112e, 112e, 112e, 112e, 112e, 112f, 112g, 112h and 112i of the polymeric spinning solution is controlled and controlled.

The spray liquid main tank 8 and the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, and 112i are connected to the supply pipe 240 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 8 are provided with valves 212, 213, 214, The nozzle tubes 112a, 112b, 112c, 112d, and 112d, which are arranged in the nozzle block 111 by opening specific valves 212, 213, 214, and 233 among the plurality of valves 212, 213, 214, 112b, 112d, 112f, 112g, 112h, 112i of the nozzle tubes 112a, 112b, 112e, 112f, 112g, 112h, 112i, 213, 214, and 233, such as blocking the supply of the polymer solution, to only the nozzle tubes 112a, 112c, and 112e at specific positions in the nozzle tube body arranged in the nozzle block 111, Room used by In the main tank 8 is supplied to the polymer spinning solution to be supplied to each nozzle tube (112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i) is adjusted and controlled.

That is, the nozzles 111a provided in the supply pipe 240 and the nozzle pipes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i are addressed, (111a).

The means for regulating the amount of radiation comprises valves 212, 213, 214 and 233.

By providing the valves 212, 213, 214 and 233 as the radiation amount adjusting means, it is possible to supply the respective nozzles 111a from the supply pipe 240 by opening and closing the valves 212, 213, 214 and 233 The valves 212, 213, 214 and 233 are controllably connected to a controller (not shown), and the valves 212, 213, 214, It is also possible that the opening and closing of the valves 212, 213, 214, and 233 are manually controlled according to the situation of the field and the operator.

In the present invention, if the amount of radiation of the polymer spinning solution is easily controlled and controlled after being supplied to the nozzle 111a from the supply pipe 240, the spinning amount adjusting means is composed of the valves 212, 213, 214 and 233 The radiation amount adjusting means may be configured by various other structures and means, but is not limited thereto.

In the present invention, valves 212, 213, 214 and 233 are provided in the supply pipe 240 so that the nozzle tubes 112a, 112b, 112c, 112d, and 112d of the nozzle block 111 in the spinning liquid main tank 8, 112, 112f, 112g, 112h, 112i, and the valves 212, 213, 214, 233 are provided in the supply pipe 240 to control the flow rate of the polymer tubing liquid supplied to the nozzle tubes 112a, 112b, 112c, 112c, 112c, 112d, 112c, 112d, 112e, 112f, 112g, 112h, 112i and regulating and controlling the radiation amount of the polymer spinning solution which is electrospun through each nozzle 111a, The nanofiber webs having different basis weights are formed in the longitudinal direction of the base material 115 by the polymer spinning solution which is electrospun from the respective nozzles 111a of the base materials 111a to 112d, 112e, 112f, 112g, 112h and 112i.

The nanofiber layer of the present invention is characterized in that the nanofiber layers are electrospun and laminated in different weights in the longitudinal direction, i.e., the MD direction. The MD direction is the machine direction, which means the direction perpendicular to the CD direction (Cross Direction), and the MD direction also refers to the longitudinal direction / longitudinal direction.

Basis Weight or Grammage is defined as the mass per unit area, that is, the preferred unit, grams per square meter (g / m 2).

5 is a plan view showing a work process in which the basis weight of the polymer is radiated differently in the MD direction according to the operation of the nozzle in the spinning solution unit. As described above, the operation of the nozzle in the spinning solution unit is electrically turned on and off A nanofiber layer having different basis weights in the MD direction can be formed.

Example

A polyurethane solution was prepared by dissolving a polyurethane having a weight average molecular weight of 157,000 in dimethylformamide (DMF), putting the polyurethane solution into each of the spinning liquid main tanks, separating the nozzle block into two parts in the MD direction, A nozzle block containing an on-off system designed to be connected to the main tank was applied at an applied voltage of 20 kV and electrospun on a substrate having a basis weight of 3 g / m 2. On the electrospun collector, polyurethane nanofibers having a basis weight of 0.2 g / m < 2 > of 1 m in one direction in the MD direction and 2 m in width of MD having a basis weight of 0.5 g / m < 2 & And a polyurethane nanofiber layer was laminated on a substrate to prepare a mask pack. At this time, bottom-up electrospinning was performed under the condition that the distance between the electrode and the collector was 40 cm and the temperature was 22 ° C.

1: electrospinning device, 3: feed roller,
5: take-up roller, 7: main control device,
8: Main tank,
10a: low melting point polymer unit 10b: spinning liquid unit
11: nozzle block, 12: nozzle,
13: collector, 14, 14a, 14b: voltage generator,
15, 15a, 15b: long sheet, 16: auxiliary conveying device,
16a: auxiliary belt, 16b: auxiliary belt roller,
18: case, 19: insulating member,
30: Long sheet conveying speed adjusting device, 31: Buffer section,
33, 33 ': support roller, 35: regulating roller,
40: tube body, 41, 42: heat wire,
43: pipe, 60: thermostat,
70: thickness measuring device, 80: air permeability measuring device,
90: laminating device, 111: nozzle block,
111a: nozzle, 112: nozzle tube,
112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i:
115: substrate, 115a, 115b, 115c: nanofiber web,
200: overflow device,
211, 231: stirring device, 212, 213, 214, 233: valve,
216: second transfer pipe, 218: second transfer control device,
220: intermediate tank, 222: second sensor,
230: regeneration tank, 232: first sensor,
240: supply piping, 242: supply control valve,
250: circulating fluid recovery path, 251: first transfer pipe,
300: VOC recycling apparatus, 310: condensing apparatus,
311, 321, 331, 332: piping, 320: distillation device,
330: solvent storage device, 404: air supply nozzle,

Claims (5)

A method of manufacturing a mask pack, comprising a substrate and a plurality of nanofiber layers,
The nanofiber layer is formed by electrospinning the polymer solution in the longitudinal direction with different weights,
The bond between the base material, the nano fiber layer and the nano fiber layer is formed through an adhesive layer formed by electrospinning a low melting point polymer solution selected from at least one of a low melting point polyester, a low melting point polyvinylidene fluoride and a low melting point polyurethane Wherein the mask pack is manufactured by a method of manufacturing a mask pack delete The method according to claim 1,
Characterized in that the electrospinning of the low melting point polymer solution is radiated to a part or whole of the substrate and the nano fiber layer The method according to claim 1,
Wherein the polymer for forming the nanofiber layer is selected from a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer. 5. The method of claim 4,
The hydrophilic polymer is selected from any one of polyacrylonitrile, polyvinyl alcohol, polyamide, and hydrophilic polyurethane,
The hydrophobic polymer is selected from polyvinylidene fluoride, a low-melting-point polyester, and a hydrophobic polyurethane,
Wherein the heat-resistant polymer is selected from the group consisting of polyamic acid, meta-aramid, and polyethersulfone.

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