KR20190118540A - Nanofiber-filter for mask and it's manufacturing - Google Patents

Abstract

A manufacturing method of the present invention comprises: a base cover filter supplying step of forming a synthetic fiber material for filtering particles of 10μm or more; an electrospinning step of forming nanofibers filtering particles of 0.2 to 0.5 μm or more; and a thermal bonding step of bonding the base cover filter and the nanofibers. The electrospinning step includes a nozzle horizontal movement speed adjusting step, which prevents direct physical damage to the nanofibers and prevent the loss of function even when cleaned or washed for reuse.

Description

Nanofiber filter for mask and manufacturing method thereof {NANOFIBER-FILTER FOR MASK AND IT'S MANUFACTURING}

The present invention is a mask for a mask that does not lose the function of tearing even after washing or washing (washing) for reuse to prevent physical damage that is torn by increasing the tensile strength of the nanofiber filter with a nanofiber filter for mask and its manufacturing method A nanofiber filter and a method of manufacturing the same.

According to the present invention, a mask nanofiber filter and a method for manufacturing the same, in general, a nanomaterial nanomaterial having a dimension of at least 100 nm or less, in the case of textile fibers having a diameter of 100 nm and an aspect ratio of 100: 1 or more Can be defined as the flexible solid-state nanomaterial. Microfiber is a fiber that shrinks more than a hundredth of the thickness of human hair and has been used in the term micro fiber. Fibers of less than 1 micrometer are being used as a new standard for microfibers, which are called nanofibers.

The electrospinning production of the prior art for producing such a nanofiber will be described with the accompanying drawings. 1 is a conventional electrospinning manufacturing process referring to this,

It consists of three types of high voltage power supply and nozzle collector, and the polymer solution is discharged through the nozzle by controlling the flow rate at a constant speed through a pump. At this time, one electrode connects a power supply and a nozzle tip to inject charge into the discharged polymer solution and charges the opposite electrode to a dust collecting plate. It is hemispherical by polymer surface tension discharged to the nozzle end. When high voltage is applied to the nozzle tip, liquid droplets are conical due to mutual electrostatic repulsion between surface charges and coulombic force applied to external electric field. Stretched in the form of a Taylor cone. That is, when an electric field of a certain intensity is applied to the nozzle tip in contact with the polymer solution, one charge of + and-continues to accumulate in the polymer solution, and continues to accumulate in the polymer solution of the same charge. Beyond the surface tension, the hemispherical shape of the nozzle tip is radially stretched by a jet of a talyor cone shape. At this time, the fibers are collected in the direction of the current collector plate which is charged with the opposite charge or is grounded to obtain randomly arranged nanofibers. .

The following is a conventional invention Republic of Korea Patent Publication No. 10-1485119 relates to a method for producing an improved polyether sulfone nanofiber membrane using electrospinning.

(1) preparing a spinning solution by adding polyethersulfone to an N-methyl-2-pyrrolidone solution; (2) preparing a nanofiber membrane by electrospinning the spinning solution prepared in step (1); And (3) washing and solidifying the nanofiber membrane obtained in the step (2) in distilled water, followed by drying in air. The method for preparing a polyethersulfone nanofiber membrane is disclosed. Compared to the membrane for water treatment, it has the advantage of high water permeability and contaminant removal efficiency.

However, the conventional invention is that the nanofiber has a low tensile strength, which is easy to be directly physically damaged, and furthermore, it may be torn off at the time of washing or washing for reuse, and the function of the hemispherical polymer solution in the nozzle during electrospinning may be conical. In this case, the cone angle is concentrated at about 30 degrees, and thus uniform radiation is difficult.

Republic of Korea Patent Publication No. 10-1485119

The technical problem to be solved by the present invention is to provide a method for manufacturing a nanofiber filter for masks formed by electrospinning the nanofibers to protect the function and appearance and uniform overall area, and to provide a nanofiber filter for masks manufactured through the same.

A base cover filter supplying step of supplying a formed base cover filter for filtering particles having a diameter of 10 μm or more; An electrospinning step of forming nanofibers filtering at least one particle of 0.2 μm to 0.5 μm on the base cover filter; and a thermal bonding step of bonding the base cover filter and nanofibers to the electrospinning step. It provides a nozzle left and right moving step for moving the nozzle from side to side for uniform nanofiber production.

The method may further include a second filter supplying step of supplying a second cover filter of any one ply to three plies of synthetic fiber material, wherein the thermal bonding step includes thermally bonding the base cover filter, the nanofibers, and the second cover filter. To provide.

In addition, the base cover filter supply step of supplying a base cover filter of a natural fiber or a synthetic fiber material filtering the particles of 10㎛ or more; Forming a first adhesive layer to adhere to the base cover filter; And an electrospinning step of forming nanofibers for filtering any one or more particles of 0.2 μm to 0.5 μm on the first adhesive layer, wherein the electrospinning step includes a nozzle for moving the nozzle from side to side for uniform nanofiber production. It provides a right and left movement speed adjustment step.

In addition, the second adhesive layer forming step of forming a second adhesive layer to adhere to the nanofibers; and the second cover filter for supplying any one of the first layer or three layers of natural fiber or synthetic fiber material on the second adhesive layer It provides a filter supply step.

It is to provide a nanofiber filter for mask prepared by the above manufacturing method.

The present invention prevents physical damage that is torn by increasing the tensile strength of the nanofibers, and thus does not lose their function even after being washed or washed for reuse, and uniformly throughout the process of manufacturing nanofibers by electrospinning. To provide one radiation.

1 is a manufacturing process of the electrospinning of the prior art
Figure 2 is a block diagram showing a process for manufacturing a nanofiber filter for the mask according to an embodiment of the present invention.
3 is a view showing a main part manufacturing apparatus according to an embodiment of the present invention.
4 is a view showing an electrospinning apparatus according to an embodiment of the present invention.
Figure 5 is a block diagram showing a process for manufacturing a nanofiber filter for a mask according to another embodiment of the present invention.
6 is a view showing a main part manufacturing apparatus according to another embodiment of the present invention.
Figure 7 is a block diagram showing a process for manufacturing a nanofiber filter for a mask according to another embodiment of the present invention.
8 is a view showing a main part manufacturing apparatus according to another embodiment of the present invention.
Figure 9 is a block diagram showing a process for manufacturing a nanofiber filter for masks according to another embodiment of the present invention.
10 is a view showing a main part manufacturing apparatus according to another embodiment of the present invention.

2 to 4 will be described below with reference to the drawings showing an embodiment of the present invention.

1. A method of manufacturing a nanofiber filter for a mask, comprising: a base cover filter supplying step (S10) of supplying a base cover filter (11) of a synthetic fiber material formed to filter particles having a diameter of 10 μm or more; Electrospinning step (S20) to form a nanofiber 35 to filter any one or more particles of 0.2㎛ to 0.5㎛ on the base cover filter 11; and the base cover filter 11 and nanofibers 35 It includes a thermal bonding step (S40) for bonding, the electrospinning step (S20) includes a nozzle left and right moving step for moving the nozzle to the left and right for the production of uniform nanofibers.

Here, the base cover filter 11 may be formed of a woven fabric or a nonwoven fabric. The base cover filter 11 may be formed of a woven fabric or a nonwoven fabric. The base cover filter 11 may absorb and capture pollutants having opposite charges by applying an electrostatic charge, or may discharge the pollutants having the same charge. It may be formed of a material using a sheet. In addition, it includes combining a three-layer filter formed of a layer or the middle of the carbon fiber (carbon fiber) as described above. In the base cover filter supply step (S10), the base cover filter 11 of synthetic fiber material is supplied to the filter supply device 10.

Electrospinning step (S20) is a general high voltage power supply for producing nanofibers through a jet of the electrically charged polymer solution and melt on the base cover filter (11) supplied in a clean room (clean room) The electrospinning apparatus 30 including the supply 31, the nozzle 33, and the collector 32 is comprised. Here, the nozzle 33 comprises a left and right movement step of moving the left and right, but the left and right swing device to adjust the speed to obtain a uniform void of any one of 0.2㎛ to 0.5㎛. It may also comprise a drying and washing step by configuring a dry washing apparatus.

In the thermal bonding step (S40), the nanofibers 35 formed on the base cover filter 11 in the electrospinning step (S20) is bonded to each other through the thermal bonding device (50). It can be bonded by ultrasonic method, high frequency method or hot air method. At this time, the joining surface is not a whole surface, but a joining surface of a pattern where the geometric shapes are repeatedly repeated in the shape of dots, comb or checker pattern arranged like a checkerboard. It becomes a filter. When bonded as described above, the tensile strength of the nanofibers 35 is increased to the level of the base cover filter 11 to prevent the damage to tear even in the external physical impact to maintain the filtration function and to increase the function by stepwise filtration.

5 and 6 are views showing another embodiment, the second filter supply step (S30) for supplying any one of the second cover filter 41 of one to three ply of synthetic fiber material And, the thermal bonding step (S40) includes the base cover filter 11, the nanofiber 35, the second cover filter 41 is bonded through the thermal bonding device 50 to be integral.

Here, the second filter supply step S30 configures a second filter supply device 40 to supply the second cover filter 41. The second cover filter 41 may be formed of at least one carbon fiber, and may be formed of a woven fabric or a nonwoven fabric.

When bonded through the thermal bonding device 50, the tensile strength of the nanofibers 35 increases to the level of the base cover filter 11 or the second cover filter 41 to prevent damage from tearing even in the external physical impact filtration function To maintain its function.

7 and 8 is a view showing another embodiment of the base cover filter supply step (S10) for supplying a base cover filter 11 of natural or synthetic fibers filtering the particles of 10㎛ or more; A first adhesive layer forming step (S11) of forming a first adhesive layer to adhere to the base cover filter (11); Electrospinning step (S20) to form a nanofiber 35 to filter any one or more particles of 0.2㎛ to 0.5㎛ on the first adhesive layer; Including,

The electrospinning step (S20) includes a nozzle left and right movement speed adjusting step.

Here, in the base cover filter supply step S10, the base cover filter 11 made of natural fiber material is supplied to the filter supply device 10.

The first adhesive layer forming step (S11) is an adhesive layer forming apparatus for bonding a water-soluble binder or a hotmelt adhesive onto the base cover filter 11 supplied in the base cover filter supply step (S10) by spraying or printing. 20 forms the first adhesive layer. At this time, the first adhesive layer is formed on the surface of the uppermost layer in such a way that the filter function is not impaired.

Electrospinning step (S20) constitutes an electrospinning manufacturing apparatus 30 to form a nanofiber 35 having any one of 0.2㎛ to 0.5㎛ above the first adhesive layer, the electrospinning manufacturing apparatus 30 In the nozzle 33 is moved left and right, but comprises a left and right swing device for adjusting the speed to obtain a uniform gap of any one of 0.2㎛ to 0.5㎛ nozzle left and right movement step.

9 and 10 are views showing another embodiment to form a second adhesive layer (S21) for forming a second adhesive layer to adhere to the nanofibers 35; and the natural fiber or synthetic fiber material on the second adhesive layer A second filter supplying step (S30) of supplying the second cover filter 41 of any one to three ply; It further includes.

Here, the second adhesive layer forming step (S21) is the adhesive layer forming apparatus 21 for bonding the water-soluble binder or hotmelt adhesive (hotmelt adhesive) on the nanofibers 35 in a spray method or a printing method to form a second adhesive layer. do. At this time, the second adhesive layer is formed on the surface of the uppermost layer in such a way that the filter function is not impaired.

The second filter supplying step 30 configures the second filter supplying device 40 to supply the second cover filter 41 formed of any one layer or three layers of natural fibers or synthetic fibers.

The second cover filter 41 may be formed of at least one carbon fiber, and may be formed of a woven fabric or a nonwoven fabric.

Therefore, the nanofiber filter for mask made of the manufacturing method increases the tensile strength of the nanofibers 35 to prevent the damage to tear even in the external physical impact, and do not tear even if washed or washed (washing) for reuse for filtration It maintains its function and enhances its function by staged filtration.

S10: base cover filter supply step S11: first adhesive layer forming step
S20: electrospinning step S21: second adhesive layer forming step
S30: second filter supply step S40: thermal bonding step
10: filter supply device 11: base cover filter
20,21: adhesive layer forming apparatus
30: electrospinning manufacturing apparatus 31: power supply
32: dust collecting plate 33: nozzle
34: clean room 35: nanofiber
40: second filter supply device 41: second cover filter
50: thermal bonding device

Claims (1)

In the manufacturing method of the nanofiber filter for mask,
A base cover filter supplying step of supplying a formed base cover filter for filtering particles having a diameter of 10 μm or more;
Electrospinning step of forming a nanofiber to filter any one or more particles of 0.2㎛ to 0.5㎛ on the base cover filter; And
A thermal bonding step of bonding the base cover filter and the nanofibers, and the electrospinning step includes a nozzle left and right moving step of moving the nozzles from side to side for uniform nanofiber production;
And a second filter supplying step of supplying a second cover filter of any one layer or three layers of a synthetic fiber material, wherein the thermal bonding step has a geometric shape of the base cover filter, the nanofibers, and the second cover filter. It is made by thermal bonding in a repeating continuous pattern;
A second adhesive layer forming step of forming a second adhesive layer bonded to the nanofibers; and
A second filter supplying step of supplying a second cover filter of any one layer or three layers of natural fibers or synthetic fibers on the second adhesive layer; the method of manufacturing a nanofiber filter for a mask further comprising: .

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