KR102116636B1 - Method and apparatus for attaching film on plate with curved surface and plate manufactured therefrom - Google Patents

Abstract

Provided is a device for attaching a film on a substrate having a curved surface, the device comprising: a lower transfer roll installed in a lower portion of a transfer table transferring a substrate to transfer the substrate; an upper pressing roll disposed in an upper portion of the lower transfer roll, and pressing to attach the film on the substrate; a supply roll continuously supplying the film with the upper pressing roll, a collection roll recovering release paper separated from the film; a preheating unit applying heat through the upper pressing roll to preheat the film; a driving unit rotating the lower transfer roll to control the transfer speed of the substrate; a pressure control unit adjusting the gap between the lower transfer roll and the upper pressing roll to control the film attachment pressure of the upper pressing roll to the substrate; and a control unit controlling film preheating temperature, substrate transfer speed, or film attachment pressure, thereby closely attaching the film on the curved surface of the substrate.

Description

Method and apparatus for attaching a bent substrate film, and a film-attached substrate manufactured therefrom TECHNICAL FIELD OF METHOD AND APPARATUS FOR ATTACHING FILM ON PLATE WITH CURVED SURFACE AND PLATE MANUFACTURED THEREFROM

The present disclosure relates to an attaching method and apparatus for attaching a film to a substrate surface having a curved surface, and a film attaching substrate produced therefrom.

In general, a functional film can be attached to a substrate made of glass or the like to improve various functions.

For example, large-sized glass panes are used for windows and windows in houses for viewing or mining. By attaching a functional film to such a plate glass, it is possible to obtain an effect of blocking ultraviolet rays or heat or enhancing a decorative effect. In addition, it is possible to secure the rigidity of the plate glass, thereby enhancing the effect of preventing damage due to typhoons, strong winds, and external forces.

However, in the case of a substrate having a flat surface and a curved surface, there is a problem that the film is not properly attached due to the curved surface and a step.

Thus, in the conventional case, when the film is attached to a substrate having a curved surface, the convex portion adheres properly to the film, but the stepped or concave portion does not closely adhere to the film. Thus, air bubbles (air pockets) are formed between the substrate and the film.

These bubbles cause turbidity and deformation of the film adhesive material due to moisture and other components contained therein. Therefore, a problem occurs that deteriorates the function of the film and inhibits the appearance of the substrate.

An object of the present invention is to provide a method and apparatus for attaching a curved substrate film capable of closely attaching a film to a surface of a corrugated substrate, and a film-attached substrate produced therefrom.

An object of the present invention is to provide a method and apparatus for attaching a curved substrate film capable of more firmly attaching a film to a substrate having a curved surface, and a film-attached substrate produced therefrom.

The attachment device of the present embodiment is installed on the lower portion of the transfer table for transferring the substrate, the lower transfer roll for transferring the substrate, the upper pressing roll disposed on the lower transfer roll and pressing the film on the substrate to attach it, the upper portion Supply roll to continuously supply the film with a pressure roll, a collection roll to recover the release paper separated from the film, a preheating section for preheating the adhesive of the film by applying heat through the upper pressurizing roll, and rotatingly driving the lower transfer roll Drive unit for controlling the transfer speed of the substrate, a pressure control unit for controlling the film adhesion pressure of the upper pressing roll to the substrate by adjusting the gap between the lower transfer roll and the upper pressing roll, and the adhesive preheating temperature or substrate transfer of the film It may include a control unit for controlling the speed or film adhesion pressure.

The upper pressure roll or the lower transfer roll has a surface made of a rubber material, and the surface hardness may be 78 to 80 based on a maximum of 100.

The control unit may control the pressure adjusting unit such that the film attachment pressure is set to 0.6 to 0.7 MPa.

The control unit may control the preheating unit so that the adhesive preheating temperature of the film is set to 53 to 57 ° C.

The control unit may control the driving unit such that the substrate transfer speed is set to 30 to 40 mm / sec.

The method of attachment of the present embodiment comprises preparing and transferring a substrate having a curved surface and a film for attaching the substrate, separating release paper from the film, preheating the adhesive, and pressing and attaching the film to the curved surface of the substrate It may include.

In the film preparation step, the film is an adhesive PET film coated with an adhesive on one side, and the thickness of the film may be 37 to 50 μm.

The thickness of the pressure-sensitive adhesive applied to the film may be 10 to 15㎛.

In the step of preparing the substrate, the step of the bent portion formed on the surface of the substrate may be greater than 0 and less than 1.2 mm.

In the step of preheating the film, the film preheating temperature may be 53 to 57 ° C.

In the attaching step, the transfer speed of the substrate and the film may be 30 to 40mm / sec.

In the attachment step, the film adhesion pressure to the substrate may be 0.6 to 0.7 MPa.

In the attaching step, the upper pressing roll or the lower transferring roll for pressing and attaching the film to the substrate is made of a rubber material, and the hardness of the surface may be 78 to 80 based on a maximum of 100.

The substrate of this embodiment may be a substrate manufactured from the above apparatus or method.

The substrate, the film is attached along the curved portion of the surface, the step difference of the curved portion formed on the substrate surface is greater than 0 and less than 1.2mm, the film is an adhesive PET film coated with an adhesive on one surface, the thickness of the film is 37 to 50㎛, the thickness of the pressure-sensitive adhesive may be 10 to 15㎛.

As described above, according to this embodiment, the film can be tightly attached on the curved substrate having no flat surface without generating bubbles.

In addition, the film is firmly attached to the curved portion of the substrate, and is not easily removed. Accordingly, it is possible to increase the quality or reliability of the product.

1 is a schematic view showing a device for attaching a curved substrate film according to the present embodiment.
2 is a schematic cross-sectional view showing a substrate manufactured according to the present embodiment.
3 is a schematic flowchart illustrating a process of attaching a curved substrate film according to the present embodiment.

Hereinafter, embodiments of the present invention will be described in detail. However, this is provided as an example, and the present invention is not limited thereto, and the present invention is only defined by the scope of claims to be described later. The embodiments described below may be modified in various forms within limits that do not depart from the concept and scope of the present invention. Where possible, the same or similar parts are indicated by the same reference numerals in the drawings.

The terminology used hereinafter is for reference only to specific embodiments and is not intended to limit the invention. The singular forms used herein also include plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of “comprising” embodies certain properties, regions, integers, steps, actions, elements and / or components, and other specific properties, regions, integers, steps, actions, elements, components and / or groups It does not exclude the existence or addition of.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the following examples are only preferred embodiments of the present invention, and the present invention is not limited to the following examples.

1 schematically shows a configuration of a device for attaching a curved substrate film according to this embodiment, and FIG. 2 schematically shows a cross-section of a substrate manufactured according to this embodiment.

The apparatus of this embodiment attaches the film 200 to the plate-shaped curved substrate 100 having a three-dimensional curved portion 110 on its surface. The curved substrate 100 having the three-dimensional curved portion 110 on the surface is a curved portion 110, as shown in FIG. 2, in which the surface steps are not flat and the surface step difference caused by the concave portion 112 and the convex portion 114 repeatedly appears. It may mean a substrate 100 having a. For example, the curved substrate 100 may be a glass plate having a three-dimensional pattern on itself. Hereinafter, for convenience of description, a surface on which the surface bent portion 110 is formed is referred to as a curved surface of the substrate 100.

The film 200 may be made of a polyethylene terephthalate (PET) material coated with an adhesive 210 on one side. The film 200 may be supplied with a release paper 220 attached to the adhesive 210 applied surface.

As shown in Figure 1, the film 200 attachment device of this embodiment, the upper pressing roll 310 and the lower transfer roll 320, which is disposed up and down on the transfer table 300 for transferring the substrate 100, A supply unit for supplying the film 200, a preheating unit 330 for applying heat to the film 200, a driving unit 340 for moving the substrate 100, and a pressure adjusting unit for adjusting the attachment pressure to the film 200 ( 350), and a control unit 360 for controlling each component.

The control unit 360 may be connected to the preheating unit 330, the driving unit 340, and the pressure regulating unit 350 to control and drive each of these components. The control unit 360 allows the film 200 to be closely attached to the curved surface of the substrate 100 so that the preheating temperature of the film 200 or the transfer speed of the substrate 100 or the pressure of attaching the film 200 through each component Controls the required setting value.

By being tightly attached, it may mean that the film is completely adhered and adhered to the substrate bent portion without generating bubbles.

Accordingly, the substrate 100 and the film 200 are pressure-closed by an appropriate temperature, pressure, and transfer speed controlled by the controller. Therefore, the film 200 may be closely attached to the curved surface of the substrate 100.

A plurality of transfer rolls 302 for supporting and smoothly transferring the substrate 100 along the inlet and outlet sides of the transfer table 300 may be installed at intervals. The substrate 100 is supported by the transfer roll 302 of the transfer table 300 so as to pass between the upper pressing roll 310 and the lower transfer roll 320, and in this process, the film 200 of the substrate 100 It is attached to the curved surface.

A lower transfer roll 320 is provided on the transfer table 300. The lower transfer roll 320 is located on the lower surface of the substrate 100 to contact the substrate 100. The lower transfer roll 320 is rotationally driven to transfer the substrate 100, and pressurizes the substrate 100 and the film 200 between the upper pressing roll 310. The surface of the lower transfer roll 320 in contact with the substrate 100 may be formed of an elastic material such as rubber or urethane.

The driving unit 340 is connected to the rotating shaft of the lower transfer roll 320 to rotate and drive the lower transfer roll 320. The driving unit 340 may include, for example, a driving motor. The driving unit 340 is not limited to the driving motor and is applicable as long as the lower transport roll 320 can be rotated at a set speed. The driving unit 340 rotates the lower transfer roll 320 at a set speed according to the control signal of the control unit 360. Accordingly, the substrate 100 is passed between the upper pressing roll 310 and the lower feeding roll 320 at a set speed according to the rotation of the lower feeding roll 320.

In this embodiment, the control unit 360 may set the transfer speed of the substrate 100 by the lower transfer roll 320 to 30 to 40 mm / sec by controlling the driving unit 340. Therefore, while the substrate 100 and the film 200 are moved at an appropriate speed and under pressure, the film 200 can be closely attached to the curved surface of the substrate 100.

When the transfer speed of the substrate 100 by the driving unit 340 exceeds the above range, the film 200 is not properly attached to the curved surface of the substrate 100, so air bubbles may be generated in the recess 112 or the stepped portion. have. In addition, when the transfer speed of the substrate 100 is smaller than the above range, overall productivity may be reduced.

The upper pressing roll 310 is connected to a pressure adjusting unit 350 for controlling the pressure of the film 200 attached to the upper pressing roll 310 to the substrate 100 by adjusting the distance between the lower feeding roll 320 Can be installed.

The pressure regulating unit 350 may adjust the upper and lower heights of the upper pressing roll 310 with respect to the conveying table 300 to adjust the distance from the lower conveying roll 320. By adjusting the distance between the lower transfer roll 320 and the upper pressing roll 310, the attachment pressure of the upper pressing roll 310 to the substrate 100 and the film 200 passing therebetween can be adjusted. The pressure regulating unit 350 may include, for example, a driving cylinder that raises and lowers the upper pressing roll 310 up and down. The pressure regulating unit 350 is not limited to the driving cylinder, and is applicable to all the upper pressing rolls 310 as long as they can be moved up and down to a set value.

The pressure regulating unit 350 raises and lowers the upper pressing roll 310 to a value set according to the control signal of the control unit 360 to attach the pressure of the upper pressing roll 310 to the substrate 100 and the film 200. Adjust the. Thus, the film 200 may be pressed to a pressure set by the upper pressing roll 310 and attached to the film 200.

In this embodiment, the control unit 360 may set the pressure of the film 200 attached to the upper pressing roll 310 to the substrate 100 by controlling the pressure adjusting unit 350 to 0.6 to 0.7 MPa. Therefore, the film 200 is pressed against the substrate 100 at an appropriate pressure, so that it can be closely attached to the curved surface of the substrate 100.

When the pressing force of the film 200 of the upper pressing roll 310 by the pressure adjusting part 350 is out of the above range, it is difficult to effectively press and press the film 200 on the curved surface of the substrate 100 as a whole. When the pressing force of the film 200 exceeds the above range, the upper pressing roll 310 or the lower transferring roll 320 or the substrate 100 may be damaged. When the pressing force of the film 200 is smaller than the above range, the film 200 is not properly attached to the substrate 100 and air bubbles may be generated between the film 200 and the substrate 100.

The upper pressing roll 310 is disposed on the lower transfer roll 320 and is attached by pressing the film 200 on the curved surface of the substrate 100 at the top of the substrate 100. The upper pressing roll 310 may have a structure that rotates freely. Accordingly, while the upper pressing roll 310 is freely rotated in accordance with the movement of the substrate 100 while being pressed against the curved surface of the substrate 100, the film 200 is pressed onto the substrate 100 to be attached. The surface of the upper pressing roll 310 may be formed of an elastic material such as rubber or urethane,

In this embodiment, the surface hardness of the upper pressing roll 310 or the lower feeding roll 320 may be 78 to 80 based on a maximum of 100. Accordingly, the surface of the upper pressing roll 310 is elastically deformed in accordance with the curved surface formed on the substrate 100, so that the film 200 can be closely attached to the curved surface of the substrate 100.

When the surface hardness of the upper pressing roll 310 or the lower transferring roll 320 is outside the above range, it is difficult to effectively press and close the film 200 to the curved surface of the substrate 100. When the surface hardness exceeds the above range, the substrate 100 may be damaged. In addition, bubbles may be generated because the surface of the upper pressing roll is not elastically deformed in accordance with the curved surface of the substrate.

When the surface hardness is smaller than the above range, the upper pressing roll 310 or the lower feeding roll 320 may be damaged by the edge of the substrate 100 upon initial entry. In addition, by overcoming the tension of the film does not reach the film to the main portion of the substrate, air bubbles may be generated between the substrate 100 and the film 200.

In the present embodiment, the preheating unit 330 may be a structure for preheating the adhesive 210 of the film 200 through the upper pressing roll 310. The preheating unit 330 may include, for example, a heating element installed inside the upper pressing roll 310 to heat the surface of the upper pressing roll 310. Various structures may be applied to the heating element, including an electric heater or an infrared heater that converts electrical energy into thermal energy. The preheating unit 330 may be applied to any structure surface that applies heat through the upper pressing roll 310 surface.

By applying heat through the upper pressing roll 310, the adhesive 210 of the film 200 passing through the upper pressing roll 310 may be preheated to increase adhesion.

The preheater 330 preheats the pressure-sensitive adhesive 210 of the film 200 by heating the upper pressing roll 310 to a temperature set according to the control signal of the control unit 360. Accordingly, the film 200 is more closely and firmly attached to the substrate 100 by the adhesive 210 preheated while passing through the upper pressing roll 310.

In this embodiment, the control unit 360 may set the pre-heating temperature of the pressure sensitive adhesive 210 to 53 ° C to 57 ° C by controlling the preheating unit 330. The rigid PET film does not exhibit a change in physical properties such as crystallization to soft under the above-mentioned preheating temperature. By heating the pressure-sensitive adhesive to the above temperature by the preheating portion, the pressure-sensitive adhesive has appropriate fluidity. Due to the increase in fluidity, the pressure-sensitive adhesive can penetrate to the minute irregularities formed on the surface of the substrate. Accordingly, the adhesive effect of the adhesive can be enhanced.

As described above, the pressure-sensitive adhesive 210 of the film 200 is preheated to an appropriate temperature before the film 200 is pressed and attached, so that the film can be closely attached to the curved surface of the substrate 100.

When the pre-heating temperature of the pressure-sensitive adhesive 210 of the upper pressing roll 310 by the preheating unit 330 is out of the above range, it is difficult to evenly and closely attach the film 200 to the curved surface of the substrate 100. When the preheating temperature of the film 200 exceeds the above range, the pressure-sensitive adhesive 210 melts due to overheating, resulting in excessive fluidity, causing the pressure-sensitive adhesive, clumping, and distortion. As a result, it is difficult to ensure a uniform adhesive force and causes aesthetic deterioration. If the pre-heating temperature of the pressure-sensitive adhesive 210 is smaller than the above range, the pre-heating of the pressure-sensitive adhesive 210 is insufficient and the adhesive strength is lowered, and the film is not properly attached to the substrate 100, or the film 200 and the substrate 100 are completely separated. Bubbles may be generated in between.

A supply roll 370 for continuously supplying the film 200 and a collection roll 372 for recovering the release paper 220 separated from the film 200 may be disposed on the transfer table 300.

The supply roll 370 and the collection roll 372 may be spaced apart on both sides with the upper pressing roll 310 interposed therebetween. The film 200 released from the supply roll 370 is brought into close contact with the outer circumferential surface of the upper pressing roll 310 by the direction changing roll 374 and the separating roll 376 and is transported together according to the rotation of the upper pressing roll 310. . The supply roll 370 may apply tension required for the film 200. Thus, the film 200 may be transported in tight contact with the outer circumferential surface of the upper pressing roll 310.

The release paper 220 separated from the film 200 is recovered by being wound on a collection roll 372 after passing through a separation roll 376. Since the release paper 220 is separated from the film 200, the adhesive 210 applied to the film 200 is exposed to the outside. The film 200 from which the release paper 220 is separated is transferred along the upper pressing roll 310 in a state where the adhesive 210 faces the substrate 100, and mediates the adhesive 210 on the curved surface of the substrate 100 It is attached with pressure.

As described above, according to the present embodiment, the substrate 100 having the film 200 closely attached to the surface of the substrate 100 having the bent portion 110 can be manufactured.

2 illustrates a flexural substrate 100 manufactured according to this embodiment and having a film 200 closely attached to the flexure 110. As shown in FIG. 2, the film 200 is in close contact with the convex portion 114 of the curved surface of the substrate 100 as well as the concave portion 112 without air bubbles.

In this embodiment, the step D of the bent portion 110 formed on the surface of the substrate 100 may be greater than 0 and less than or equal to 1.2 mm.

In addition, the film 200 may have a thickness L of 37 to 50 μm, and a thickness H of the adhesive 210 may be 10 to 15 μm.

When the step (D) of the bent portion 110 is outside the above range, the film 200 is not properly attached to the bent portion 110 of the substrate 100. When the step (D) of the bent portion 110 is smaller than the above range, the substrate has a flat plate structure without a bent portion, and thus an adhesion problem to the bent portion does not occur. When the step of the bent portion 110 exceeds the above range, bubbles are generated because the film cannot reach the main portion of the substrate under the set pressure. When the film adhesion pressure is increased, a phenomenon in which the substrate is broken may occur.

When the thickness (L) of the film 200 is smaller than the above range, it is not a problem on the surface of the film attached to the bent portion, but it is difficult to obtain the effect of preventing scattering, which is the main purpose of film attachment. The film has an effect of preventing scattering of fragments when the substrate is damaged, but when the thickness of the film is thin, the scattering prevention function of the fragments is remarkably lowered and it is difficult to use for the purpose of preventing scattering. When the thickness (L) of the film 200 exceeds the above range, adhesion defects are generated in the bent portion, and air bubbles are generated.

When the thickness (H) of the adhesive 210 applied to the film 200 is outside the above range, the film 200 is not properly attached to the bent portion 110 of the substrate 100. When the thickness 210 of the pressure-sensitive adhesive 210 is smaller than the above range, it is difficult to expect sufficient adhesive strength to hold the tension generated in the film. When the thickness of the pressure-sensitive adhesive 210 exceeds the above range, the effect of increasing the adhesion force due to the thickened pressure-sensitive adhesive does not appear any more, and the amount of the flowable pressure-sensitive adhesive due to preheating is excessive, so that the pressure-sensitive adhesive sticks, clumps, and distorts. Weighted, deterioration of aesthetics may occur.

Hereinafter, the process of attaching the film of the bent substrate according to this embodiment will be described with reference to FIG. 3.

According to this embodiment, a substrate having a curved surface and a film to be attached to the substrate are prepared.

The substrate may be prepared by forming the step of the bent portion formed on the surface of 1.2 mm or less. The film is an adhesive PET film coated with an adhesive on one side, and the thickness of the film is 37 to 50 μm, and the thickness of the adhesive applied to the film may be 10 to 15 μm.

The substrate and film are transferred at a set speed. As the film moves according to the substrate transfer speed, the film is attached to the curved surface of the substrate.

In this embodiment, the substrate and film transfer speed may be 30 to 40 mm / sec.

When the substrate transfer speed by the driving unit exceeds the above range, the film may not be properly attached to the curved surface of the substrate, and air bubbles may be generated in the recessed or stepped portions. When the substrate transfer speed is smaller than the above range, the overall productivity may decrease.

In the process of transferring the substrate and film, the adhesive of the film is preheated to the set temperature. The film is separated from the pressure-sensitive adhesive and transferred to the curved surface of the substrate to be tightly attached to the substrate.

In this embodiment, the preheating temperature for the pressure-sensitive adhesive of the film may be 53 ℃ to 57 ℃. By heating the pressure-sensitive adhesive to the above temperature, it is possible to induce further improved adhesion, and it is possible to closely adhere the film to the curved portion of the substrate without air bubbles.

The film in which the adhesive layer is preheated is pressed and attached to the curved surface of the substrate at a set pressure.

In this embodiment, the film adhesion pressure to the substrate may be 0.6 to 0.7 MPa.

In addition, in the process of attaching the film to the substrate by pressing, the upper pressing roll or the lower conveying roll for pressing and attaching the film to the substrate is made of a rubber material, and the hardness of the surface can be 78 to 80 based on a maximum of 100. .

When the pressure of attaching the film to the substrate is out of the above range, it is difficult to effectively press the film in close contact with the curved surface of the substrate. When the film pressing force exceeds the above range, the upper pressing roll or the lower feeding roll or the substrate may be damaged. When the film pressing force is smaller than the above range, the film is not properly attached to the substrate and air bubbles may be generated between the film and the substrate.

In addition, when the surface hardness of the upper pressing roll or the lower transferring roll is outside the above range, it is difficult to effectively press-press the film to the curved surface of the substrate. If the surface hardness exceeds the above range, the substrate may be damaged. When the surface hardness is smaller than the above range, the upper pressing roll or the lower transferring roll may be damaged by the edge of the substrate upon initial entry, and air bubbles may be generated between the substrate and the film.

As such, through the manufacturing process of the present embodiment, the film can be closely attached without air bubbles to the surface of the substrate on which the bent portion is formed.

[Experimental Example]

According to this embodiment, a film was attached to a surface of a substrate on which a bent portion was formed to prepare a substrate.

Table 1 shows the film adhesion conditions of the substrate and the results accordingly.

The experiment was carried out by moving the prepared substrate through the apparatus of this example to continuously attach the film.

In the experiment, a glass substrate having a curved surface with a step difference of 1.2 mm was used. The film is a PET-made film coated with an adhesive on one side, the thickness of the film is 50㎛, and the thickness of the adhesive is 10㎛.

The experiment was performed by pre-heating the adhesive of the film while pressing the film on the substrate while moving the substrate and the film prepared through the device.

Each experiment was carried out by slightly different pressure, preheating temperature, moving speed, etc. under the same equipment and conditions.

Experimental results according to the pressing force Experiment One 2 3 4 5 6 7 8 9 10 Pressure (MPa) 0.4 0.5 0.5 0.6 0.6 0.7 0.7 0.8 0.8 0.9 Travel speed (mm / sec) 30 30 30 35 35 35 40 40 40 40 Preheating temperature (℃) 53 53 54 54 55 55 56 56 57 57 result(%) 46 11 4 0 0 0 0 3 5 damage

Experimental results according to the moving speed Experiment One 2 3 4 5 6 7 8 9 10 Pressure (MPa) 0.6 0.6 0.6 0.6 0.6 0.7 0.7 0.7 0.7 0.7 Travel speed (mm / sec) 26 28 30 32 34 36 38 40 42 44 Preheating temperature (℃) 53 53 54 54 55 55 56 56 57 57 result(%) 0 0 0 0 0 0 0 0 6 17

Experimental results according to the preheating temperature Experiment One 2 3 4 5 6 7 8 9 10 Pressure (MPa) 0.6 0.6 0.6 0.6 0.6 0.7 0.7 0.7 0.7 0.7 Travel speed (mm / sec) 30 30 30 35 35 35 40 40 40 40 Preheating temperature (℃) 50 51 52 53 54 55 56 57 58 59 result(%) 5 4 3 0 0 0 0 0 0 0

Experimental results according to roll hardness Experiment One 2 3 4 5 6 7 8 9 10 Pressure (MPa) 0.6 0.6 0.6 0.6 0.6 0.7 0.7 0.7 0.7 0.7 Travel speed (mm / sec) 30 30 30 35 35 35 40 40 40 40 Preheating temperature (℃) 53 53 54 54 55 55 56 56 57 57 Roll hardness (max 100) 75 76 77 78 79 80 81 82 83 85 result(%) 12 11 8 0 0 0 damage damage damage damage

The result of the experiment was expressed as a percentage of the number of ridges on which the bubbles were formed because the film was not properly attached to the number of ridges of the bent portion on the entire substrate.

As shown in the experimental results shown in the above tables, it can be seen that when the film is attached to the substrate according to the pressure, the moving speed, the preheating temperature, etc. of the present embodiment, the film can be closely attached without air bubbles to the surface of the bent portion of the substrate.

For example, in the experiment of Table 1, when the adhesion pressure to the film and the substrate exceeds 0.6 to 0.7 MPa, it can be confirmed that bubbles were generated because the film was not properly attached to the main portion of the substrate.

In the experiment results shown in Table 2, even when the moving speed was 30 mm / sec or less, air bubbles did not appear, but the work speed was too slow to decrease productivity.

In addition, as in the experiment of Table 3, when the pressure-sensitive adhesive preheating temperature is 53 degrees to 57 degrees, it can be confirmed that the film can be closely adhered without the occurrence of phenomena such as bubble generation or the sticking of the pressure-sensitive adhesive. As a result of the experiment according to the preheating temperature, bubbles were not generated when the preheating temperature was 57 degrees or higher, but the sticking, bunching, and distortion of the adhesive occurred.

As a result of the experiment on the surface hardness of the roll of the upper pressing roll and the lower conveying roll, as shown in Table 4, it can be confirmed that the best result appears without breaking the substrate within the range of the roll hardness of 78 to 80 based on a maximum of 100. have.

As described above, although exemplary embodiments of the present invention have been illustrated and described, various modifications and other embodiments may be made by those skilled in the art. These modifications and other embodiments are all to be considered and included in the appended claims, without departing from the true spirit and scope of the invention.

100: substrate 200: film
210: adhesive 220: release paper
300: Transfer table 310: Upper pressing roll
320: lower feed roll 330: preheating section
340: driving unit 350: pressure control unit
360: Control unit 370: Supply roll
372: collection roll

Claims (8)

A curved substrate film attachment device for attaching a film to a curved surface of a substrate having a curved portion where the surface is not flat and the surface level difference due to the recessed portion and the repeated portion repeatedly appears,
It is installed on the lower portion of the transfer table for transferring the substrate, a lower transfer roll for transferring the substrate, an upper pressing roll disposed on the upper portion of the lower transfer roll and pressing the film on the substrate to attach, and continuously filming the film with the upper pressing roll. Supply roll to supply, collection roll to recover release paper separated from the film, preheating section for preheating the adhesive of the film by applying heat through the upper pressing roll, rotational driving of the lower feeding roll to control the transfer speed of the substrate A driving unit for controlling the pressure between the lower transfer roll and the upper pressing roll to control the film attachment pressure of the upper pressing roll to the substrate, and controlling the film preheating temperature or the substrate transfer speed or film attachment pressure. Includes a control unit,
The upper pressing roll has a surface made of a rubber material, the hardness of the surface is a maximum of 100 to 78 to 80 bending substrate film attachment device. According to claim 1,
Bend substrate film attachment device for controlling the preheating portion so that the control portion is set to a film preheating temperature of 53 to 57 ℃. The method of claim 1 or 2,
Bend substrate film attachment device for controlling the pressure control unit so that the control unit is set to 0.6 to 0.7MPa film attachment pressure. The method of claim 3,
Bend substrate film attachment device for controlling the drive unit so that the control unit is set to a substrate transfer speed of 30 to 40mm / sec. A method for attaching a film to a curved substrate for attaching a film to a curved surface of a substrate having a curved portion where the surface is not flat and the surface level difference due to the recessed portion and the repeated portion repeatedly appears,
Preparing and transferring a film for attaching a substrate having a curved surface and a substrate for attaching the substrate, separating and preheating the release paper from the film, and pressing and attaching the film to the curved surface of the substrate,
In the step of pressurizing and attaching the film, the film adhesion pressure to the substrate is 0.6 to 0.7 MPa, the surface is made of a rubber material, and the hardness of the surface is pressurized to the substrate with an upper pressing roll of 78 to 80 based on a maximum of 100. A method of attaching a flexible substrate film to be attached. The method of claim 5,
In the step of pressure-attaching the film, the transfer speed of the substrate and the film is 30 to 40 mm / sec. The method according to claim 5 or 6,
In the step of preheating the film, the film preheating temperature is 53 to 57 ℃ bending substrate film attachment method. A substrate manufactured from claim 1 or 6, wherein the surface is not flat, and a curved portion in which surface differences due to recesses and convex portions are repeatedly formed is formed, and the film is closely adhered to the curved surface on which the curved portion is formed to be attached. Substrate.

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