KR20140013758A - Polypropylene fabric wallpaper surface reforming devices by air plasma glowing - Google Patents

Abstract

The present invention relates to a surface reforming device and more specifically, to a surface reforming device for polypropylene fabric wallpapers using atmospheric pressure plasma which is specialized in fabric wallpaper industries in order to continuously perform a surface reformation work for polypropylene fabric wallpapers in an open area using the atmospheric pressure plasma. For the above characters, the present invention comprises: a chamber to which the inner space is connected to the outside through the opened bottom surface; a fabric transferring unit which transfers the fabric wallpapers to the inner space of the chamber through the opened bottom surface of the chamber; a plasma generation unit which generates the atmospheric plasma using corona discharge in the inner space of the chamber and reforms the surface of the fabric wallpapers transferred by the fabric transferring unit; and a control panel which controls the transfer speed of the fabric wallpapers and discharge current of the plasma generation unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a polypropylene fabric wallpaper surface reforming apparatus using atmospheric plasma,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface modifying apparatus, and more particularly, to a surface modifying apparatus using atmospheric pressure plasma, a polypropylene fabric wallpaper The present invention relates to a surface modification apparatus for a surface modification.

The fact that the general public's demand for indoor interior is gradually increasing as the level of people's living has increased recently can be confirmed at the apartment interior construction site, which can be easily seen from the surrounding area. As the demand for indoor interior is increasing, interest in human-friendly functional wallpaper is continuously expanding. Paper wall paper, PVC wallpaper, etc., which occupy most of the currently used wallpaper, do not meet the demand level. In particular, PVC wallpaper is used as a luxurious image, but since it contains chlorine itself, it can release toxic gas in case of fire, and most of the plasticizers added to it are known as harmful substances causing hormone disorder . Accordingly, materials for textile wallpapers which have flame retardancy and functionalities (antimicrobial, antifouling, sound absorption, etc.) and do not emit toxic gas in the case of fire are being actively developed. Particularly, polypropylene fabric wallpaper has excellent functions such as antibacterial and antifouling properties Since the molecular structure consists of only carbon and hydrogen, it does not emit toxic gas in case of fire. Although the polypropylene fabric wallpaper has excellent functionality, it is difficult to develop a post-processing technique for imparting flame retardancy, which limits the use of the polypropylene fabric wallpaper for wallpaper use.

Conventionally, ultraviolet surface modifying apparatuses have been mainly used for surface modification of fabric wallpaper. However, since the amount of ultraviolet energy irradiated to the fabric wallpaper in the ultraviolet surface modifying apparatus is not large, the surface modifying efficiency is not high, In particular, there is a problem in that the surface modification efficiency of polypropylene fabric wallpaper, which is difficult to postpone compared with other fabric wallpaper, is not high.

In order to solve such a problem of ultraviolet surface modifying apparatus, Korean Patent Registration No. 10-0414130 entitled " Apparatus and method for modifying fiber surface using low-temperature low-pressure plasma ", in which a fiber fabric is automatically controlled in a vacuum state, And a fiber using a low-temperature low-pressure plasma which is capable of applying a gas to the surface of the fiber to be treated or applying a polymerization monomer in a gaseous state to physically and chemically modifying the surface of the fiber and imparting functionality to the fiber product. Although a surface reforming device has been proposed, the cost of installing a vacuum chamber is excessive, and even if inert gas can be used, there is a possibility of fire due to gas input and management failure, The problem that it is not suitable for the wallpaper industry .

In addition, when a spark or an arc is generated in a surface modification process of a wallpaper using a plasma, the surface of the wallpaper is seriously destroyed, so that the surface modification efficiency is improved and the discharge condition is strictly controlled There was a need to control.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

It is an object of the present invention to provide a surface modifying apparatus for wallpaper, which is capable of continuous surface modifying process of fabric wallpaper in an open space by using atmospheric plasma and does not inject atmospheric gas.

Another object of the present invention is to provide a surface modification apparatus for a wallpaper, which can maximize the surface modification efficiency while strictly controlling the discharge conditions in order to minimize the generation of sparks or arcs in the corona discharge process.

Hereinafter, the present invention will be described.

With regard to the task solution,

The present invention relates to a method of manufacturing a chamber, which comprises a chamber in which an inner space is connected to the outside through an opened lower surface, a raw material transferring unit for transferring a fabric wallpaper to an internal space of the chamber through an opened lower surface of the chamber, And a control panel for controlling a feeding speed of the fabric wallpaper and a discharging current of the plasma generating part, and a control panel for controlling the feeding speed of the fabric wallpaper and the discharging current of the plasma generating part .

Further, in the present invention, the chamber is provided with a front door, which is openable and closable, made of a transparent or semitransparent material so as to observe the inner space of the chamber, on the front surface of the chamber.

In addition, in the present invention, the fabric transferring unit may include a winding frame in which the chamber is coupled to the upper end, a guide roller horizontally installed in the winding frame and guiding the fabric wallpaper end supplied from the outside to the inner space of the chamber, A take-up roller which is provided in the take-up frame so as to be parallel to the take-up frame and which is rotated by a power supplied from the take-up roller driving motor to be guided to the inner space of the chamber by the guide roller, And a plurality of tension rollers provided on the winding frame in parallel with the guide rollers along the path and applying a uniform tension to the fabric wallpaper.

The plasma generating unit may include a roller-shaped ground electrode that is horizontally rotatable in an inner space of the chamber and has a dielectric coating layer on the outer circumference thereof, and a height adjustment unit that is installed through the upper surface of the chamber. Shaped metal electrode which is integrally connected to the fixed plate provided so as to be movable up and down in the direction of the axis of rotation and which is disposed so as to face the outer circumferential surface of the roller-shaped ground electrode and on the outer surface facing the outer circumferential surface of the ground electrode, And a power supply for supplying high-voltage DC power to the discharge electrode and the metal discharge electrode.

In the present invention, the height adjusting means is a height adjusting screw formed on the outer circumferential surface of the male screw cooperating with the female screw formed in the through hole of the chamber.

According to the present invention, the metal discharge electrode is composed of three metal discharge electrodes which are arranged in parallel on a fixing plate along the transfer path of the fabric wallpaper to face the outer circumferential surface of the ground electrode.

Further, the present invention is further characterized by an exhaust system for discharging ozone and nitrogen oxides generated due to corona discharge in the internal space of the chamber to the outside.

The present invention adopts a surface modification method using a plasma to increase the surface modification efficiency of the fabric wallpaper and insulate the dielectric between the metal discharge electrode and the ground electrode to strictly control the discharge condition so that a spark or an arc is generated during the corona discharge, In particular, since the dielectric is fixed to the ground electrode instead of the metal discharge electrode, natural cooling of the dielectric is facilitated, thereby widening the choice of the dielectric material.

In addition, the present invention has a plurality of protruding lines protruding at uniform intervals on the lower surface of the metal discharge electrode, thereby preventing spark or arc from being generated due to uneven discharge in the metal discharge electrode.

In addition, the present invention has the effect of maximizing the surface modification effect of the fabric wallpaper by arranging the three metal discharge electrodes in parallel.

The present invention also has the effect of adjusting the distance between the metal discharge electrode and the ground electrode, that is, the discharge gap, so as to maximize the effect of surface modification of the fabric wallpaper by allowing the user to adjust the height of the metal discharge electrode through the height adjustment means .

In addition, the present invention allows a user to control the rotation speed of the winding roller driving motor or the output current of the power supply through the control panel, thereby maximizing the effect of surface modification of the fabric wallpaper. The negative discharge current can be controlled.

Further, since the atmospheric pressure plasma is used and the atmospheric gas is not supplied, it is not necessary to provide expensive vacuum equipment, the continuous surface modification of the fabric wallpaper in the open space is possible, and the effect of minimizing the risk of fire occurrence have.

In addition, since the front door of the transparent or semi-transparent material can be opened or closed on the front surface of the chamber, it is possible to monitor the occurrence of sparks or arcs during the surface modification process.

In addition, since the present invention can utilize a generally used spinning machine for fabric wallpaper, the fabric can be used as a feeding part, so that manufacturing and installation costs can be minimized.

In addition, the present invention has an exhaust system connected to the inner space of the chamber, so that ozone (O ₃ ) and nitrogen oxide (NO _x ) generated during corona discharge can be discharged to the outside.

1 is a front view showing a surface modification apparatus according to the present invention;
2 is a side view showing a surface modification apparatus according to the present invention;
3 is a cross-sectional view showing a plasma generating portion of the surface modification apparatus according to the present invention.
4 is a side cross-sectional view showing a plasma generating portion of the surface modification apparatus according to the present invention.
5 is a block diagram schematically showing a configuration of a control panel of a surface modification apparatus according to the present invention.

Hereinafter, a surface modification apparatus according to the present invention will be described with reference to FIGS. 1 to 5 attached hereto.

FIG. 1 is a front view showing a surface modifying apparatus according to the present invention, FIG. 2 is a side view showing a surface modifying apparatus according to the present invention, and FIG. 3 is a sectional view showing a plasma generating section of the surface modifying apparatus according to the present invention FIG. 4 is a side sectional view showing a plasma generating unit of the surface modifying apparatus according to the present invention, and FIG. 5 is a block diagram schematically showing the configuration of a control panel of the surface modifying apparatus according to the present invention.

The surface modification apparatus 10 according to the present invention includes a chamber 100, a raw material transfer unit 200, a plasma generation unit 300, and a control panel 400.

The chamber 100 has an inner space in which a plasma generating unit is installed, and a lower surface of the chamber 100 is opened so that a fabric wallpaper fabric, to which the fabric is transferred by the transmitting unit, can be transferred to the inner space.

In addition, the chamber 100 may be provided with a front door 110, which is transparent or semitransparent, so as to open and close the front door 110 so that the interior space can be observed. The front door 110 is coupled to the chamber through a hinge 112 and has a handle 114 to allow the user to easily open and close the door.

The fabric transferring unit 200 includes a winding frame 210, a guide roller 220 horizontally installed on the winding frame and guiding the outer surface of the fabric wallpaper to the inner space of the chamber, A take-up roller 240 installed in the frame for taking up the fabric wall fabric that is supplied from the outside by being powered by the take-up roller driving motor 230, And a plurality of tension rollers 250 installed on the winding frame parallel to the rollers and applying a uniform tension to the textile wallpaper fabric.

It is preferable that the chamber is coupled to the upper end of the winding frame 210.

The take-up roller driving motor 230 is an apparatus for converting electrical energy into mechanical energy. It is preferable that the take-up roller driving motor 230 is built with a speed reducer (not shown) .

Although the tension roller 250 is shown as two in the drawings, the tension roller 250 is spaced apart from the take-up roller by a distance between the chamber and the take-up roller so as to prevent the cloth wallpaper material fed by the take-up roller from being sagged by gravity, As shown in FIG.

The plasma generator 300 includes a ground electrode 310 connected to a positive terminal of the power supply, a ground electrode 310 disposed to face the ground electrode and connected to a minus terminal of the power supply. When a high voltage direct current power is applied from the power supply, And a power supply 360 for applying high-voltage DC power to the ground electrode and the metal discharge electrode.

The ground electrode 310 is installed in the inner space of the chamber parallel to the guide rollers so that the fabric wallpaper guided by the guide rollers can contact the outer circumferential surface.

The ground electrode 310 preferably includes a dielectric coating layer 320 on an outer circumferential surface thereof facing the metal discharge electrode.

The ground electrode 310 preferably has a roller shape rotatably coupled to the chamber so that heat generated in the dielectric coating layer can be naturally cooled by corona discharge.

The metal discharge electrode 330 is integrally coupled to the lower surface of the fixing plate 350, which is vertically movable in the inner space of the chamber by height adjusting means installed through the upper surface of the chamber, And is connected to a minus terminal of the power supply to receive a high-voltage DC power. In addition, the metal discharge electrode 330 preferably has a plurality of protruding lines 332 protruding from the outer surface of the ground electrode at regular intervals. In addition, the metal discharge electrode 330 is preferably divided into three metal discharge electrodes coupled to the fixed plate.

The height adjusting means is preferably a height adjusting screw 340 having a male screw on the outer circumferential surface, but it is not limited thereto and various means such as a cylinder and a gear can be used. When the male thread formed on the outer circumferential surface of the height adjusting screw 340 is rotated in cooperation with the female screw formed in the through hole of the chamber, the height adjusting screw 340 is vertically moved with respect to the chamber to vertically move the fixing plate integrally coupled to the lower end of the height adjusting screw.

In addition, at least two height adjusting screws 340 may be provided to adjust the level of the fixing plate.

The power supply 360 is connected to a minus terminal (not shown) connected to the metal discharge electrode to supply the converted high-voltage direct-current power to the high-voltage DC power supply, Terminal (not shown).

The control panel 400 controls the rotation speed of the take-up roller driving motor and the output current of the power supply according to a signal inputted by the user.

Further, the surface modification apparatus 10 according to the present invention may further include an exhaust system 500 for exhausting ozone and nitrogen oxides generated due to corona discharge in the internal space of the chamber to the outside.

The exhaust system 500 includes an exhaust pipe 510 coupled to an upper end of the chamber and connected to the outside of the chamber, and an exhaust pipe 510 installed in the exhaust pipe. The exhaust system 500 operates by receiving electric energy from the outside, And a fan 520 for sucking and discharging the nitrogen oxides to the outside.

Hereinafter, the operation of the surface modification apparatus 10 according to the present invention will be described.

When the user operates the take-up roller driving motor 230, the take-up roller 240 rotates and winds the fabric wallpaper 20 connected thereto. The fabric wallpaper 20 is guided to the inner space of the chamber 100 by the guide roller 220 and is wound around the winding roller 240 through the outer peripheral surface of the roller-shaped ground electrode 310, The tension roller 250 receives a predetermined tensile force to prevent sagging and wrinkling.

Meanwhile, by controlling the rotation speed of the take-up roller driving motor 230, the user can adjust the conveying speed of the fabric wallpaper, i.e., the plasma processing speed. While adjusting the plasma processing speed from 0.3 m / min to 2.0 m / min, As a result of the experiment with the wallpaper fabric, it was confirmed that the water absorbency and water content of the fabric wallpaper were increased as the plasma exposure time to plasma was lowered, but the surface of the fabric wallpaper was damaged at a speed of less than 1.0 m / min .

When a user applies a high voltage direct current power between the ground electrode 310 and the metal discharge electrode 330 by operating the power supply 360 of the plasma generator through the control panel 400, A corona is generated and electrons emitted from the metal discharge electrode 330 are accelerated by a high voltage to collide with surrounding air molecules to ionize the air molecules to form a plasma. These electrons ultimately collide with the fabric wallpaper 20 passing between the ground electrode 310 and the metal discharge electrode 330, thereby breaking and activating the surface molecule bonds of the fabric wallpaper. Since the activated surface molecule is an unstable molecular structure and has a strong binding property with other materials, it rapidly reacts with the atmospheric plasma to change the surface molecular structure of the fabric wallpaper 20.

The dielectric coating layer 320 coated on the outer circumferential surface of the ground electrode 310 is charged like a capacitor when a high voltage DC power is applied between the ground electrode 310 and the metal discharge electrode 330, By discharging, sparks or arcs are generated during the surface modification process to prevent the surface of the fabric wallpaper 20 from being damaged. Since the dielectric coating layer 320 is provided on the ground electrode 310 instead of the metal discharge electrode 330, the dielectric coating layer 320 can be easily cooled naturally and the dielectric material is not limited. The metal discharge electrode 330 has a plurality of protruding lines (332) are provided at regular intervals, so that discharge can be uniformly generated without sparks or arcs.

On the other hand, in order to confirm the improvement of the water absorption and water content according to the number of times of plasma treatment of the fabric wallpaper, the result of the experiment of treating the fabric wallpaper with one to four times of the plasma treatment is as follows. , It was confirmed that the water content was increased, but when it exceeded 3 times, the surface of the fabric wallpaper was observed to be damaged. Accordingly, it is preferable that the three metal discharge electrodes 330 are installed in parallel so that the surface treatment of the fabric wallpaper can be continuously performed three times when the fabric wallpaper is passed through the chamber once.

By controlling the output current of the power supply 360, the user can adjust the discharge current between the metal discharge electrode and the ground electrode applied to the fabric wallpaper. The user can control the output current from 1A to 5A while processing the fabric wallpaper Experimental results show that the higher the output current, the higher the absorbency and moisture content of the fabric wallpaper. However, at the output current of 3A or higher, the fabric surface is damaged.

The user can adjust the distance between the metal discharge electrode integrally fixed to the fixing plate and the ground electrode fixed to the chamber by moving the height adjusting screw 340 by moving the fixing plate 350 up and down. , The water absorbency and water content of the fabric wallpaper were not significantly changed according to the electrode interval. However, the plasma formation was not uniform at the electrode gap of 4 mm or more, and the surface of the fabric wallpaper was not reformed properly Respectively.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. And such changes are, of course, within the scope of the claims.

10: Surface modification device
20: Fabric wallpaper fabrics
100: chamber
110: Front door
112: hinge
114: handle
200: Fabric is sent
210: Winding frame
220: guide roller
230: Retraction roller driving motor
240: winding roller
250: Tension roller
300: Plasma generator
310: ground electrode
320: dielectric coating layer
330: Metal discharge electrode
332: protruding line
340: Height adjustment screw
350: Fixing plate
360: Power supply
400: Control Panel
500: Exhaust system
510: Exhaust pipe
520: Fans

Claims (7)

A chamber in which an inner space is connected to the outside through an opened lower surface;
A fabric transfer unit for transferring the fabric wallpaper fabric to the internal space of the chamber through the opened lower surface of the chamber;
A plasma generator for generating a plasma at atmospheric pressure using a corona discharge in the inner space of the chamber and modifying the surface of the cloth wallpaper fabric transferred by the cloth transferring; And
And a control panel for controlling a conveying speed of the fabric wallpaper and a discharge current of the plasma generating unit. The apparatus for surface modification of polypropylene fabric wallpaper using atmospheric pressure plasma. The method of claim 1,
The chamber may comprise:
Wherein an openable and closable front door made of a transparent or semi-transparent material is installed on the front surface of the chamber so as to observe the inner space of the chamber. The method of claim 1,
The fabric transfer unit,
A winding frame to which the chamber is coupled at the top;
A guide roller horizontally installed on the winding frame and guiding a fabric wallpaper end supplied from the outside to the inner space of the chamber;
A winding roller installed on the winding frame so as to be parallel to the guide roller and winding up a fabric wallpaper to be guided to the inner space of the chamber by the power of the winding roller driving motor to rotate the guide roller; And
Atmospheric pressure plasma characterized in that it comprises a plurality of tension rollers are installed in the winding frame in parallel to the guide roller along the transport path of the fabric wallpaper fabric wound by the winding roller and apply a uniform tension to the fabric wallpaper fabric Surface modification apparatus of used polypropylene fabric wallpaper. The method of claim 1,
The plasma generator,
A roller-shaped ground electrode provided to be rotatable horizontally in an inner space of the chamber and having a dielectric coating layer on an outer circumferential surface thereof;
The chamber being integrally coupled to a fixing plate provided so as to be movable up and down in an internal space of the chamber by a height adjusting means provided through the upper surface of the chamber and arranged so as to face an outer circumferential surface of the roller shaped ground electrode, A rod-like metal discharge electrode having a plurality of protruding lines protruding at uniform intervals on an outer surface thereof; And
And a power supply for supplying high-voltage DC power to the metal discharge electrode. 5. The method of claim 4,
Wherein the height adjusting means is a height adjusting screw formed on an outer circumferential surface in cooperation with a female screw formed in the through hole of the chamber. 6. The method of claim 5,
Wherein the metal discharge electrode is composed of three metal discharge electrodes arranged in parallel on the fixing plate along the transfer path of the fabric wallpaper to face the outer circumferential surface of the ground electrode. 7. The method according to any one of claims 1 to 6,
Further comprising an exhaust system for exhausting ozone and nitrogen oxides generated due to corona discharge in the inner space of the chamber to the outside.

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