KR101586219B1 - Apparatus for producing a breathable film using a UV laser - Google Patents

Abstract

The present invention relates to a device to manufacture an air-permeable film using a UV laser, capable of processing the air-permeable film material using a UV pulse laser. More specifically, the device to manufacture the air-permeable film using the UV laser is capable of processing a fine groove of the film material since at least one laser beam passes through a laser modulator, distributing a laser induced by a frequency.

Description

[0001] The present invention relates to a breathable film using a UV laser,

The present invention relates to an apparatus for producing an air-permeable film using a UV laser for processing an air-permeable film fabric using a UV laser, and more particularly, And to an apparatus for manufacturing an air-permeable film using a UV laser capable of processing fine grooves.

BACKGROUND ART [0002] Recently, widely used packaging materials have been used as packaging materials made of plastic films excellent in moisture resistance, waterproofing and sealing effect. In the case of a plastic film, it is superior in durability and sealing property compared with paper, and can be stored for a long period of time, and various kinds of printing can be performed, and thus it is used as packaging materials for foods such as instant foods. In particular, the use of plastic film materials in coffee-beverage packaging materials, pouches for storing various foods, and the like is almost unique.

The plastic film packaging material can be made of a single material such as polypropylene, polyethylene or the like and can be made of a composite material such as a polyamide, a polypropylene, a polyethylene (PE) (Polyethylene terephthalate (PET) or Oriented Polypropylene (OPP)), Ny or the like is used as the inner layer material of the wrapping paper such as aluminum foil , nylon (hereinafter referred to as Ny) It is made of the outer surface material of the wrapping paper.

As such, the plastic film packaging material has excellent sealing effect and is used in various fields. In recent years, a breathable film is being developed in which air is permeated by making minute scratches on the outside of the packaging material.

The breathable film is a film that permeates air but does not transmit liquid, and is a functional film that maintains the properties of vinyl as it is, and improves the storage stability and functionality of the packaging object. Therefore, it is widely used in various industrial fields besides food packaging.

Conventionally, when processing a breathable film, a plurality of laser oscillators are provided according to the area of the film, and fine grooves are formed on the outer surface of the plastic film. However, if a plurality of laser oscillators are used, a manufacturing cost of a plastic film processing apparatus increases.

In order to solve the above problems, an apparatus for processing a plastic film by irradiating multiple laser beams has been developed. However, the number of grooves formed in the area of the film is limited, and the number of fine grooves to be formed is controlled And the plastic film to be processed can be partially processed, thus increasing manufacturing time.

Therefore, it is necessary to develop a plastic film production apparatus which can process the number of fine grooves that can be formed on the plastic film raw material according to the user's purpose and shorten the processing time of the plastic film raw fabric.

1. Patent Document 10-2009-0046986 A film processing apparatus for a packaging material (disclosed on May 5, 2009) 2. Patent Literature 10-1385935 Laser processing apparatus (filing date Oct. 31, 2012) 3. Patent Registration No. 10-1385934 A film processing apparatus using a laser (filing date Oct. 31, 2012)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for fabricating a plurality of fine grooves on a surface of a plastic film without using a plurality of laser oscillators, The present invention provides an apparatus for producing a breathable film.

The present invention also relates to an apparatus for producing a breathable film using a UV laser capable of processing the surface of a multi-layered plastic film fabric and controlling the diameter and the like of fine grooves formed on the plastic film fabric.

The apparatus for producing an air-permeable film using a UV laser according to the present invention comprises a feed roller 100 on which a film 110 is wound; An optical device 200 for irradiating the film 110 with a laser pulse to process a plurality of fine grooves 111 on the surface of the film 110 fed from the feeding roller 100; And a winding roller (300) around which the film (110) processed through the optical device (200) is wound. The optical device (200) includes a laser oscillation unit (210) A beam expander 220 formed in front of the laser oscillator 210 to increase the thickness of the oscillated laser; A pinhole lens 230 formed in front of the beam expander 220 so as to maintain a constant wavelength of the laser transmitted from the beam expander 220; A wavelength plate 240 installed in front of the pinhole lens 230 to adjust the phase velocity of the laser transmitted from the pinhole lens 230; A laser modulator 250 which receives the laser beam passing through the wave plate 240 to divide the laser beam and changes the emission angle of the laser beam emitted so that the split laser beam is radiated in the left and right direction of the film 110; A convex lens 260 passing through the laser beam emitted from the laser modulator 250 such that the laser beam is irradiated in a direction parallel to a direction in which the film 110 is conveyed, ); A laser reflector 270 for refracting the laser transmitted through the convex lens 260 to the surface of the film 110 so that the laser is irradiated on the surface of the film 110 to form fine grooves 111; .

A plurality of laser modulators 250 are provided at predetermined intervals, and a part of the laser irradiated from the laser oscillator unit is interposed between the laser modulator 250 and the wave plate 240, A split lens 280 that is transmitted to be irradiated to one of the laser modulators 250 and partially reflects the laser to divide the laser into at least one or more of the laser modulators 250, A reflection plate 290 is formed to reflect the laser beam reflected by the plurality of laser modulators 250 to be irradiated to the other laser modulator 250 to the other laser modulator 250.

The laser modulator 250 is vertically raised so that the divided laser beams are irradiated in the transport direction of the film 110. A laser beam emitted from the laser modulator 250 is irradiated to the lower side of the laser modulator 250, And a driving motor 251 for rotating the laser modulator 250 to irradiate the film 110 in the left and right direction.

A plurality of convex lenses 260 are disposed adjacent to the convex lens 260 to improve the accuracy of the moving direction of the laser beam emitted from the laser modulator 250.

In the present invention, the laser reflector 270 is formed of a concave mirror capable of reflecting a laser, and the laser reflector 270 formed of the concave mirror has the same radius of curvature as the surface shape of the convex lens 260 And is formed in a concave shape to reflect the laser.

In the present invention, the laser modulator 250 includes a supply unit 252 for supplying a sound wave having a predetermined wavelength so that the laser is divided and reflected by a sound wave having a predetermined wavelength to split and reflect the transmitted laser. ); A wavelength converter 253 for adjusting the number of divided laser beams by adjusting the wavelength of a sound wave supplied from the supplying unit 252; And a sound absorbing part (254) for absorbing the sound wave to prevent sound waves supplied from the supply part (251) from being emitted to the outside of the laser modulator (250).

The present invention is characterized in that a laser modulator for dispersing a laser introduced by a sound wave is provided and a film can be processed by passing a laser through a laser modulator so that a plurality of fine grooves processed on the surface of the film can be formed, There is an advantage that at least one film can be processed during processing.

In addition, the present invention can process the gap and the number of the fine grooves formed through the operation of the laser modulator according to the purpose of packaging, a speed controller for controlling the feeding speed of the optical device irradiated with the laser, a position controller It is possible to shorten the production processing time.

1 is a perspective view showing a film processing apparatus using a laser according to the present invention;
2 is a perspective view showing the inside of an optical apparatus in a film processing apparatus using a laser according to the present invention.
3 is a schematic view for explaining laser processing of a film processing apparatus using the laser of the present invention.
4 is a schematic view for explaining laser processing of a film processing apparatus using a laser according to the present invention.
5 is a perspective view showing another embodiment of the laser reflector of the present invention.
6 is a perspective view showing still another embodiment of the laser reflector of the present invention.
7 is a plan view showing another embodiment of the laser modulator of the present invention.
8 is a side view showing another embodiment of the laser modulator of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a film processing apparatus using the laser of the present invention, FIG. 2 is a perspective view showing the inside of the optical apparatus among the film processing apparatus using the laser of the present invention, Fig. 5 is a perspective view showing another embodiment of the laser reflector according to the present invention, Fig. 6 is a perspective view showing another embodiment of the laser reflector according to the present invention, Fig. FIG. 7 is a plan view showing another embodiment of the laser modulator according to the present invention, and FIG. 8 is a side view showing another embodiment of the laser modulator according to the present invention.

Referring to FIG. 1, the present invention has a feed roller 100 on which a film 110 is wound. The supply roller 100 is fixed to the right and left by a first support 120 supporting the supply roller 100 to rotate. The support base 120 is seated and fixed on the upper surface of the first bottom plate 130. Therefore, the supply roller 100 is spaced upward from the upper surface of the first bottom plate 130.

Referring to FIG. 1, a take-up roller 300 is wound around an end of a film 110 wound on a feed roller 100 so that a film 110 wound on a feed roller 100 is fed. The take-up roller 300 may be placed facing each other with respect to the feed roller 100. The winding roller 300 has a second support 310 formed on the left and right sides of the feed roller 100 and fixed to the second support 310 so that the left and right sides of the winding roller 300 are rotated by the second support 310. The second support plate 310 is seated on the upper surface of the second bottom plate 320 and fixed.

Referring to FIG. 1, an optical device 200 is installed between the feeding roller 100 and the winding roller 300. The optical device 200 can process a plurality of fine grooves 111 on the surface of the film 110 by pulsed laser irradiation of the film 110. [

Referring to FIG. 2, the optical device 200 includes a laser oscillator 210 in which a laser is oscillated. The laser oscillated by the laser oscillator 210 may be used as a laser oscillator 210 in which a high repetition rate pulse laser or an ultraviolet ray (UV) laser is oscillated.

Referring to FIG. 2, a beam expander 220 is installed in front of the laser oscillator 210. The beam expander 220 penetrates the laser oscillated from the laser oscillator 210 and is provided to increase the thickness of the laser oscillated from the laser oscillator 210. A pinhole lens 230 may be formed in front of the beam expander 220. The laser passing through the pinhole lens 230 can penetrate the beam expander 220 and can keep the wavelength of the laser increased in thickness constant.

Referring to FIG. 2, a wave plate 240 is installed in front of the pinhole lens 230. The wave plate 240 is provided to change the phase velocity of the laser through the pinhole lens 230. Thus, the change of the laser speed is determined by the design of the wave plate 240.

Referring to FIG. 2, a laser modulator 250 is provided for dividing and emitting a laser beam passing through the wave plate 240. The laser modulator 250 can change the emission angle of the laser emitted when the incident laser is emitted. That is, since the emission angle of the laser is changed, the laser can be irradiated along the lateral direction of the film 110.

4, a convex lens 260 spaced apart from the laser modulator 250 by a predetermined distance is provided. The convex lens 260 changes the advancing direction of the laser so that the outgoing angle of the laser emitted from the laser modulator 250 is maintained in the same direction as the direction in which the film 100 is fed to the winding roller 300 . At this time, a plurality of convex lenses 260 may be formed in the width direction of the film 110. When the plurality of convex lenses 260 are adjacent to each other, there is an advantage that the laser passing through the plurality of convex lenses 261 can be accurately irradiated in the moving direction of the film 110. [

Referring to FIG. 2, a convex lens 260 and a laser reflector 270 spaced apart from the film 110 by a predetermined distance are installed. The laser reflection plate 270 is provided to refract the laser so as to irradiate the laser beam penetrating the convex lens 260 in a direction perpendicular to the surface of the film 110. Therefore, when the laser beam is irradiated to the surface of the film 110 in the vertical direction, the fine grooves 111 are formed on the surface of the film 110.

At this time, the laser is irradiated within the range of the fine grooves 111 not passing through the film 110. The depth of processing of the fine grooves 111 can be adjusted by providing a separate controller (not shown) capable of controlling the laser energy in the laser oscillator 210. That is, it is possible to process the fine grooves 111 in the thickness of the other film 110 according to the purpose of use, and even when the film 110 is made of double or triple layers, Can be processed.

Referring to FIG. 3, a description will be given of the laser beam irradiated on the film 110 to process the fine grooves 111. FIG. If the reflection angle of the laser beam emitted from the laser modulator 250 is large, the laser beam is irradiated to the point P1 of the convex lens 260. At this time, the laser beam is refracted by the convex lens 260 in the conveying direction of the film 110, the laser beam is refracted in the vertical direction by the laser reflector 270, and the laser beam is irradiated to the D1 point of the film 110. Therefore, the laser is irradiated to the point D1 to form the fine grooves 111. [

4, when the angle of reflection of the laser beam emitted from the laser modulator 250 is small, the laser beam is irradiated to the point P2 of the convex lens 260. When the reflection angle of the laser beam emitted from the laser modulator 250 is large The laser beam is irradiated to the point D2 of the film 110 in the same manner.

Accordingly, when the laser is divided and emitted within the range of the emission angle of the laser modulator 250, the laser is irradiated between the D1 point and the D2 point of the film 110, and a plurality of fine grooves 111 are formed between the D1 point and the D2 point Processed.

Referring to FIG. 1, a speed controller 500 for adjusting the feeding speed of the film 110 is installed. The speed controller 500 is installed at one side of the take-up roller 300 to control the speed of the take-up roller 300. The distance between the plurality of fine grooves 111 formed on the surface of the film 110 is increased along the feeding direction of the film 110 by increasing the feeding speed of the film 110 through the speed controller 500. On the other hand, if the feeding speed of the film 110 is slowed, the interval between the plurality of fine grooves 111 formed on the surface of the film 110 becomes narrow. Therefore, if the feeding speed of the film 110 is controlled through the speed controller 500, the number of the fine grooves 111 can be varied in the area of the same film 110, thereby controlling the air permeability of the film 110 .

Referring to FIG. 1, a tension controller 600 is installed between the feeding roller 100 and the winding roller 300. The tension controller 600 is vertically movably installed to prevent the film 110 from sagging. In this way, when the film 110 is prevented from sagging and a certain tension is applied to the film 110, the film 110 can be moved at a constant feed rate.

Further, when the tension controller 600 is installed so as to be movable up and down, there is an additional advantage that the laser beam passing through the convex lens 260 can keep the processing focal distance of the laser constant when the fine groove 111 is processed .

5 and 6, the laser reflector 270 may be formed in a shape corresponding to the convex lens 260. That is, the shape of the laser reflector 270 may be a concave mirror or a plurality of concave mirrors disposed adjacent to each other, and each concave mirror may be formed to have the same curvature as the radius of curvature of the convex lens 260. Accordingly, the laser beam passing through the convex lens 260 is accurately irradiated onto the film 110, which is transported at a high speed, so that the fine grooves 111 can be processed.

Referring to FIG. 7, the laser modulator 250 may be spaced apart at a predetermined interval to process the entire area of the film 110 when the width of the film 110 is large, and may be provided in at least one, preferably two, . A split lens 280 is provided between the laser modulator 250 and the wave plate 240 to divide the laser into at least one or more. The split lens 280 is transmitted so that a part of the laser irradiated from the laser oscillating unit is irradiated to one of the laser modulators 250 of the plurality of laser modulators 250, and a part thereof is reflected in one direction. In order to irradiate the reflected laser to the other laser modulator 250 not irradiated with the laser among the plurality of laser modulators 250, the reflection plate 290 for reflecting the laser in the direction in which the other laser modulator 250, ) May be additionally provided.

As described above, according to the present invention, a plurality of laser modulators 250 are provided and the split lens 280 and the reflection plate 290 are additionally provided, thereby limiting the processing of the fine grooves 111 due to the width of the film 110 There is an advantage not to do.

Referring to FIG. 8, the laser modulator 250 may be erected vertically so that the divided laser beams are irradiated in the transport direction of the film 110. Further, a driving motor 251 for rotating the laser modulator 250 at a predetermined angle may be further provided at the lower end of the laser modulator 250.

That is, since the laser modulator 250 is raised, a plurality of fine grooves 111 are primarily processed in the transport direction of the film 110, and the laser modulator 250 is rotated by the drive motor 251, (111) can be secondarily processed in the transverse direction of the film (110). Accordingly, since the area for machining the fine grooves 111 is increased, the processing time of the film 110 can be shortened.

2 and 5 to 6, the laser modulator 250 may be provided as an AOM (Acousto-optic modulator) including a supply unit 252, a wavelength conversion unit 253, and an undulating unit 254. First, the supply unit 252 supplies a sound wave having a predetermined wavelength to split and reflect the transmitted laser. The laser is reflected at the wavelength of the sound wave, the angle of the emitted laser is changed, and at the same time, the laser can be divided.

The wavelength converting unit 253 adjusts the wavelength of the sound wave supplied from the supplying unit 252, adjusts the reflection angle of the emitted laser, and adjusts the number of divided laser beams. Therefore, it is possible to adjust the number of processes of the fine grooves 111 and the like.

The sound absorbing portion 254 is formed to absorb the sound waves supplied to prevent the sound waves supplied from the supply portion 251 from being emitted to the outside of the laser modulator 250.

It is preferable that a separate control unit capable of collectively controlling the wavelength converter 254, the driving motor 251, the tension controller 600, and the position controller 400 is provided.

The present invention according to the present invention can easily adjust the number of intervals of the fine grooves 111 and the like, and advantageously, at least one film can be processed at the time of film processing and the processing area of the fine grooves 111 can be adjusted There is an advantage that the manufacturing process time can be shortened.

100: take-up roller 110: film
200: optical device 210: laser oscillation unit
220: beam expander 230: pinhole lens
240: wave plate 250: laser modulator
251: driving motor 252:
253 wavelength conversion unit 254 sound absorption unit
260: convex lens 270: laser reflector
280: split lens 290: reflector
300: take-up roller

Claims (6)

A feed roller 100 on which the film 110 is wound;
An optical device 200 for irradiating the film 110 with a laser pulse to process a plurality of fine grooves 111 on the surface of the film 110 fed from the feeding roller 100;
And a winding roller (300) around which the film (110) processed through the optical device (200) is wound,
The optical device 200 includes:
A laser oscillation unit 210 in which an ultraviolet (UV) laser is oscillated;
A beam expander 220 formed in front of the laser oscillator 210 to increase the thickness of the oscillated laser;
A pinhole lens 230 formed in front of the beam expander 220 so as to maintain a constant wavelength of the laser transmitted from the beam expander 220;
A wavelength plate 240 installed in front of the pinhole lens 230 to adjust the phase velocity of the laser transmitted from the pinhole lens 230;
The laser beam is transmitted through the wave plate 240 to divide the laser beam, and the divided laser beams are irradiated in a plurality of directions in the transport direction of the film 110 to increase the area of processing the fine grooves 111 A laser modulator 250 rising up and down in order to cause the laser beam to propagate;
The laser modulator 250 is rotated so that the fine grooves 111 are secondarily processed in the left and right width directions of the film 110 to shorten the processing time of the film 110, A driving motor 251 formed at the laser module 150 for rotating the laser modulator 150 at a predetermined angle;
A convex lens 260 passing through the laser beam emitted from the laser modulator 250 such that the laser beam is irradiated in a direction parallel to a direction in which the film 110 is conveyed, );
A laser reflector 270 for refracting the laser transmitted through the convex lens 260 to the surface of the film 110 so that the laser is irradiated on the surface of the film 110 to form fine grooves 111; / RTI >
The laser modulator 250
A supply part 252 for supplying a sound wave having a predetermined wavelength so that the laser is divided and reflected by a sound wave having a constant wavelength to split and reflect the transmitted laser;
A wavelength conversion unit 253 that adjusts the wavelength of the sound wave supplied from the supply unit 252 to adjust the reflection angle of the emitted laser beam and adjusts the number of divided laser beams to adjust the number and interval of the fine grooves 111, );
A sound absorbing part 254 for absorbing the sound wave to prevent sound waves supplied from the supply part 252 from being emitted to the outside of the laser modulator 250;
Wherein the UV laser-based breathable film manufacturing apparatus The method according to claim 1,
The laser modulators 250 are spaced apart from each other by a predetermined distance,
Between the laser modulator 250 and the wave plate 240,
A splitting lens 280 for splitting a part of the laser beam irradiated from the laser oscillating unit into at least one laser beam to be transmitted to one laser modulator 250 of the plurality of laser modulators 250, )Wow
A reflection plate 290 is formed which reflects the laser beam reflected by the split lens 280 to another laser modulator 250 of the plurality of laser modulators 250 to the other laser modulator 250 Wherein the UV laser is used to produce an air-permeable film. delete The method according to claim 1,
The convex lens 260 is disposed adjacent to the convex lenses 260 in order to improve the accuracy of the moving direction of the laser beam emitted from the laser modulator 250. [ The method according to claim 1 or 4,
The laser reflection plate 270 is formed of a concave mirror capable of reflecting a laser beam, and the laser reflection plate 270 formed of the concave mirror is formed in a concave shape having the same radius of curvature as the surface shape of the convex lens 260 Wherein the UV laser is used to reflect the laser beam. delete

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