WO2016085055A1

WO2016085055A1 - Method for manufacturing protective sheet for touch screen panel by using jig, and protective sheet manufactured thereby

Info

Publication number: WO2016085055A1
Application number: PCT/KR2015/003746
Authority: WO
Inventors: 김영수
Original assignee: 김영수
Priority date: 2014-11-25
Filing date: 2015-04-15
Publication date: 2016-06-02
Also published as: KR101605269B1

Abstract

Provided are a method for manufacturing a protective sheet for a touch screen panel by using a jig, and a protective sheet manufactured thereby, the method solving an eccentricity problem through accurate alignment, preventing damage, to the protective sheet, caused by a physical collision with an adhesion roller, and lowering production costs. In the method and the sheet, at least one cell-type glass part is accommodated in an accommodation groove of a jig provided with the accommodation groove for accommodating the cell-type glass part and carved with an alignment mark for checking the position of the glass part, and in order to form a scattering-prevention part on the glass part, a scattering-prevention part film is continuously roll-joined and laminated on the glass part accommodated in the jig while removing a damage-prevention film of the scattering-prevention part film, then the scattering-prevention part film is cut to correspond to the glass part, and scraps, excluding the scattering-prevention part corresponding to the glass part, are separated from the scattering-prevention part film.

Description

Method for manufacturing protective sheet for touch screen panel using jig and protective sheet manufactured thereby

The present invention relates to a method for manufacturing a protective sheet for a touch screen panel and a protective sheet, and more particularly, to a glass screen in the form of a jig and a scattering prevention part supplied in a roll form, by successively bonding the glass to the touch screen panel It relates to a method for producing a protective sheet for and a protective sheet produced thereby.

Touch screens are widely used in mobile devices such as mobile phones, smart phones, tablets, and terminals such as small size information processors such as ATMs and kiosks. In addition, the touch screen is expected to expand to a large size (20 inches or more) market in the future, following the small size of the market. The touch screen forms a screen using a liquid crystal display, a light emitting diode display, or the like, and provides convenience of operation. In order to prevent the touch screen from being damaged due to frequent screen touches or collisions or scratches, a touch screen is generally attached with a protective sheet. Thus, the sheet for protecting the touch screen is called a protective sheet. Recently, a protective sheet of a synthetic resin film, which is poor in scratch resistance, heat resistance, and chemical resistance, has been replaced by a protective sheet using tempered glass.

1 is a view schematically showing an apparatus for manufacturing a protective sheet to which a conventional tempered glass is applied. Here, the conventional protective sheet 60 will be divided into a glass portion (G) including a tempered glass and a scattering prevention portion (R) to prevent the scattering of the glass.

Referring to FIG. 1, a conventional manufacturing apparatus adheres a glass part holder 51, a shatterproof part holder 53, and a glass part G and a shatterproof part R in a cell to cell manner. It comprises the adhesive roller 52. The glass holder holder 51 is placed on the die 50 to receive the glass portion G. The shatterproof part holder 53 houses the shatterproof part R processed into a cell. After removing the damage prevention film of the shatterproof part R, the shatterproof part holder 53 moves in the direction of the glass part holder 51, and finally the shatterproof part is prevented from the glass part G by the bonding roller 52. Part R is laminated in a cell-to-cell manner to form a protective sheet 60.

The conventional protective sheet 60 is a glass portion (G) cut and processed to a size attached to one touch screen (also referred to as a cell) and the shatterproof portion (R) processed into a cell are bonded. As described above, since the glass part G and the shatterproof part R are processed for each touch cell and then bonded to each cell to complete the protective sheet 60, the glass part G and the scattering part when laminating the touch screen. It is difficult to avoid the eccentricity problem of the prevention part R. The scattering prevention part (R) with respect to the glass portion (G) is correctly aligned to solve the eccentricity problem, but the situation is still insufficient. In recent years, since the thickness of the glass layer is gradually thinner from 0.55 mm to 0.05 mm, especially when the glass layer of 0.5 mm or less is bonded to each cell and manufactured, cracking and poor handling result in high production rates. Furthermore, due to the physical collision at the starting point (a) where the protective sheet 60 meets the adhesive roller 52, damage to the protective sheet 60 occurs, which is difficult to adhere to the touch screen. Furthermore, since the worker must work for each cell, the productivity of the protective sheet is low and the production cost is relatively high.

The problem to be solved by the present invention is to easily stack the protective sheet for the touch screen panel of small size and large size continuously, and solve the eccentricity problem of the protective sheet without the accurate alignment when laminating, physical with the adhesive roller The present invention provides a method for manufacturing a protective sheet for a touch screen panel which prevents damage to a protective sheet due to phosphorus collision and lowers production costs, and a protective sheet manufactured thereby.

According to the method for manufacturing a protective screen for a touch screen panel utilizing a jig for solving the problem of the present invention, first the receiving groove for accommodating the glass portion of the cell shape is installed, the alignment mark for identifying the position of the glass portion is engraved Prepare the jig. Thereafter, at least one glass part in the form of the cell is accommodated in the receiving groove. In order to form the shatterproof part in the glass part, while removing the damage prevention film of the shatterproof part film, the glass part housed in the jig is continuously roll-bonded and laminated. The shatterproof part film is cut in correspondence with the glass part. The scrap is removed from the scattering prevention film except for the scattering prevention part corresponding to the glass part.

In the manufacturing method of the present invention, the glass layer thickness included in the glass portion may be 0.5 mm or less. The position coordinates of the accommodation groove in the jig are set in advance. The receiving groove preferably matches the contour of the glass portion or is larger than 0.1 mm than the glass portion. The glass portion protruding from the jig is preferably 0mm to 0.15mm or less. The alignment mark is formed on a jig that is inside the accommodation groove or outside the accommodation groove. The number of the alignment mark may be set to at least two places to recognize the receiving groove.

A part of the jig except for the receiving groove may include a surface roughness or a coated anti-stick layer. The jig may be any one selected from a metal, a ceramic, a polymer, or a mixed layer in which they are stacked. The scattering prevention part may be formed to coincide with the glass part or to have a margin of 0.2 mm or less inside the glass part.

Protective sheet for solving the other problem of the present invention is manufactured using a protective sheet manufacturing method for a touch screen panel using a jig.

According to the protective sheet manufacturing method and protective sheet for a touch screen panel using the jig of the present invention, by using a jig containing an alignment mark to produce a protective sheet in a cell to roll and (cell to roll and cell) method, accurate alignment By solving the eccentricity problem, it is possible to prevent damage to the protective sheet due to physical collision with the adhesive roller. In addition, by using a single or a plurality of glass parts continuously produced by a protective sheet at a time, the production cost can be lowered.

1 is a view for schematically explaining a method for manufacturing a protective sheet using a conventional tempered glass.

Figure 2 is an exploded perspective view showing an example of a protective sheet applied to the protective sheet manufacturing method for a touch screen panel according to the present invention.

3 is a flowchart illustrating a method for manufacturing a protective sheet for a touch screen panel using a jig according to the present invention.

Figure 4 is a plan view of the glass portion housed in the jig according to the present invention.

5 is a cross-sectional view taken along line IV (B) -IV (B) of FIG. 4.

6 is a view schematically showing a process in which the scattering prevention film and the glass portion are laminated according to the present invention.

7 is a view schematically showing a process of cutting the scattering prevention film according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Embodiment of the present invention by manufacturing a protective sheet in a cell-to-roll cell (cell to roll and cell) method using a jig including an alignment mark, to solve the eccentricity problem without the exact alignment, physical with the adhesive roller The present invention provides a manufacturing method that prevents damage to the protective sheet due to a collision and lowers the production cost. To this end, the jig including the alignment mark will be described in detail, and the process of manufacturing the protective sheet using the cell-to-roll cell method using the jig will be described in detail. The cell refers to one glass part and one shatterproof part constituting one protective sheet attached to one touch screen. The cell means that each glass part and the shatterproof part are separated and exist independently. The roll is intended to form a single or a plurality of cells in the future in the form of a film.

The method of manufacturing a protective sheet can be largely divided into a cell to cell, a cell to cell and roll, a cell to roll and cell, and a roll to roll method. In the cell-to-cell method, most of the conventional methods are used to bond the scattering prevention part pre-processed in pieces to the glass part of the sheet individually, to produce a protective sheet. By the way, the cell-to-cell method requires a plurality of jigs in the glass portion and the scattering prevention portion, it is difficult to align the plurality, and if one of the alignment is not aligned, an eccentric problem occurs. In addition, physical collision with the adhesion roller of the cell lamination start point occurs, and the production cost is high. In addition, the cell-to-cell continuous method is partially applied. This is a technology that continuously inputs the cell glass part and the cell shatterproof part by using the equipment, and stacks the sheets one by one continuously. The cell-to-cell continuous method is used in a limited production of general touch screen parts. In the cell-to-cell continuous method, the process is complicated, equipment installation cost is high, and a large amount of defects may occur.

In the cell-to-cell roll method, in splicing a piece of shatterproof portion that exactly matches a piece of glass, a shatterproof portion is prepared in a roll. Then, the cell shatterproof portion pre-processed to a size exactly matching the sheet glass portion is supplied in roll form at regular intervals by a film called a carrier. At the same time, the rolls are laminated and the carrier film is removed so as to exactly match the glass sections prepared in advance. In the cell-to-cell roll method, physical collision with the adhesive roller at the cell lamination starting point can be avoided. In addition, however, the cell-to-cell roll continuous method is complicated, and like the cell-to-cell, it is difficult to accurately stack without eccentricity, which may cause mass defects.

In the roll-to-roll method, the glass part in the form of a roll and the scattering prevention part film in the form of a roll are bonded to each other, and then produced by cutting in the form of a protective sheet. Because the glass part is easy to break, there is a problem in processing the glass after lamination. In particular, the glass portion including the glass layer of less than 0.5mm can be produced and supplied in the form of a roll in recent years, the processing of the glass unit of the cell unit after the lamination of the film is very difficult, breakage of the glass unit is inevitable. The roll-to-roll method is a technique mostly used when laminating a general film and a film.

Embodiment of the present invention is to replace the cell-to-cell method and the cell-to-cell method, the cell-to-roll cell method is applied. That is, as described above, the singular or plural glass parts of the cell form are accommodated in the jig, the scattering prevention part is supplied in the form of a roll, and the scattering prevention part can be continuously joined to the glass part irrespective of the eccentricity. And it is easily bonded without the problem of the lamination start point which is easy to occur in cell-to-cell lamination.

Figure 2 is an exploded perspective view showing an example of a protective sheet applied to the protective sheet manufacturing apparatus for a touch screen panel according to an embodiment of the present invention.

Referring to Figure 2, the protective sheet 10 comprises a glass portion (G) and shatterproof portion (R). The glass part G includes a cover film 11 that can be exposed to the outside and peeled off, and preferably a glass layer 12 using tempered glass. If necessary, the cover film 11 may not be provided. The glass layer 12 in contact with the cover film 11 may be coated separately to express various functions. The coating can be both dry coating such as wet coating and vapor deposition of the coating liquid, it can give properties such as antireflection, anti-fingerprint, antibacterial. The glass part G covers the display area and color on which the screen is located and a dummy area in which various patterns are engraved. In addition, the glass part G may be formed with an opening for exposing a button, a camera, a speaker, and the like. The cover film 11 protects the glass layer 12 from external impact or contaminants.

Shatterproof part (R), the transparent adhesive layer 13 and the damage prevention film (DF) and the other side is coated with a transparent adhesive layer 15 on one side of the transparent synthetic resin layer 14, the transparent adhesive layer 15 Release film 16 is attached. The synthetic resin layer 14 is made of a transparent polymer material, such as polyurethane, polyester or polycarbonate. The transparent adhesive layer 13 may be polyvinyl butyral resin, ethylene vinyl acetate resin, acrylic resin, or the like, and is an adhesive transparent to light. The transparent adhesive layer 13 bonds the synthetic resin layer 14 and the glass layer 12 together. With respect to the synthetic resin layer 14, the transparent adhesive layer 15 on the opposite side of the transparent adhesive layer 13 facilitates attachment and detachment of the protective sheet 10 to the touch screen. The transparent adhesive layer 15 is a transparent adhesive of an acrylic resin or a silicone resin, and the release film 16 is peeled off so that the protective sheet 10 can be easily mounted on the touch screen without bubbles.

Here, the example includes the synthetic resin layer 14 as the scattering prevention part R, but the scattering prevention part R may be implemented by the adhesive layer and the adhesive layer without the synthetic resin layer 14. In addition, although not shown, the protective sheet 10 applied to the embodiment of the present invention may add other structures to the glass portion (G) and the scattering prevention portion (R). For example, by attaching a film for the handle on both sides of the protective sheet 10, the user can easily attach the protective sheet 10 to the touch screen. Here, only the degree generally known among the protective sheets applied to the touch screen is disclosed. Accordingly, it will be apparent that other types of protective sheets described herein may be applied within the scope of the present invention.

3 is a flowchart illustrating a method for manufacturing a protective sheet for a touch screen panel using a jig and a roll according to an embodiment of the present invention. At this time, the protective sheet will be referred to Figure 2, it is possible to apply other types of protective sheet within the scope of the present invention.

According to FIG. 3, first, a plurality of glass portions G having a cell shape are accommodated in the jig 20 (S10). This will be described in detail with reference to FIGS. 4 and 5 below. Thereafter, while removing the damage preventing film DF on the jig 20, the scattering preventing part film RF in the form of a roll is supplied (S20). The shatterproof part film RF is continuously bonded to the glass part G housed in the jig 20 and laminated (S30). The lamination process will be described in detail later with reference to FIG. 5. Subsequently, in the state where the scattering part film RF is entirely covered with the glass part G and laminated, the scattering part film RF is cut in the jig unit without damage to the glass part G (S40). At this time, the cut of the scattering prevention film (RF) is cut to leave a margin (margin) smaller than or equal to the glass portion (G) to complete the protective sheet (10). Finally, remove the scrap except for the shatterproof portion (R) in the shatterproof film (RF) (S50).

According to the embodiment of the present invention, the protective sheet 10 to which the glass part G and the shatterproof part R are bonded can be ensured. In the embodiment of the present invention by using a single or a plurality of glass portion (G) by producing a protective sheet 10 at a time, it is possible to lower the production cost, significantly reducing the cracking and handling failure. In addition, it is possible to obtain the protective sheet 10 without the problem of the lamination start point that is likely to occur in the cell-to-cell lamination.

4 is a plan view in which the glass part G is accommodated in the jig 20 according to the embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line IV (B) -IV (B) of FIG. 4. At this time, the process of manufacturing the protective sheet will be referred to FIG.

According to FIGS. 4 and 5, the jig 20 accommodates a plurality of glass parts G in order to be laminated with the shatterproof part film RF. Here, the number of glass parts G accommodated in the jig 20 is set in advance in consideration of the smooth progress of the manufacturing process of this invention. For example, when the number of glass portions G is too large, bonding may not occur smoothly due to flatness problems. The jig 20 includes a receiving groove 21 for receiving the glass portion (G). The shape of the accommodating groove 21 may vary depending on the type of glass portion G of the present invention. For example, the shape or size of the accommodating groove 21 may vary depending on the glass portion G of the mobile phone or the touch pad. That is, corresponding to the various glass portion (G), the receiving groove 21 can be manufactured to match it. Accordingly, the contours of the accommodating groove 21 and the glass portion G may coincide with each other.

Furthermore, it is preferable that the outline of the receiving groove 21 is as large as 0 mm to 0.1 mm or less than the glass portion G. If 0 mm or less, the glass part G may not be accommodated. If 0.1 mm or more, an eccentricity may occur due to a recognition error of the alignment mark 22. The depth of the receiving groove 21 is in the process of manufacturing the protective sheet 10 of the present invention, so that the glass portion (G) is not separated, the height of the glass portion (G) protruding is equal to the height of the jig or 0.15mm The following is suitable. If the protruding portion of the glass portion G is lower than the jig 20, the paper will not be laminated. If it is higher than 0.15 mm, a physical collision with the adhesive roller at the starting point occurs in the conventional cell-to-cell method.

The jig 20 has a width and a thickness sufficient to sufficiently secure the receiving groove 21. The jig 20 has a rigidity such that the shape of the accommodating groove 21 is not deformed later by the scattering prevention film RF. The surface of the jig 20 may be coated with a surface roughness or an anti-adhesive coating containing fluorine or the like so that bonding with the scattering preventing film RF may not occur easily. In this case, the coating may be a dry coating such as wet coating or deposition using a resin binder. As such, when the scattering prevention film RF is not well adhered to the surface of the jig 20, the scattering prevention film RF bonded to the glass part G may be prevented from being twisted during the lamination process. The jig 20 may be made of any one of metal, ceramic, or polymer as a main body, and may be a mixed layer in which at least one of metal, ceramic, and polymer is laminated on the main body except for the receiving groove 21.

An alignment mark 22 for calculating the position coordinates of the glass portion G is displayed on the jig 20 inside or around the accommodation groove 21. In the drawing, the alignment mark 22 displayed on the jig 20 around the receiving groove 21 is taken as an example. The alignment mark 22 may be engraved away from the one side of the receiving groove 21 by the first distance D1 and the second distance D2 from the other side. In some cases, the first and second intervals D1 and D2 may be the same, but are not necessarily limited thereto. Alignment mark 22 may be a variety of shapes, but the cross shape is good. The size and number of the alignment mark 22 may vary depending on the shape of the accommodation groove 21, but it is sufficient to be able to accurately recognize the accommodation groove (21). The alignment mark 22 may be coated with a material having high reflectivity so that the alignment mark 22 may be detected by light.

The position of the receiving groove 21 in the jig 20 is stored in advance in the form of coordinates in a controller (not shown) for controlling the apparatus of the present invention. Since the coordinates of the accommodating groove 21 are set in advance, when the alignment mark 22 is confirmed, the coordinates of the glass portion G are automatically calculated. Glass portion (G) is transparent, it is difficult to directly detect. In order to overcome this, the receiving groove 21 can grasp the position coordinates of the glass portion (G) indirectly. The alignment mark 22 is particularly useful when cutting the shatterproof film RF later. By using the alignment mark 22, the problem of eccentricity of the glass portion G and the shatterproof portion R is solved. That is, with respect to the glass part G, the scattering prevention part R is grasped correctly and the said eccentricity problem no longer arises.

6 is a view schematically illustrating a process in which the scattering prevention film RF and the glass part G are laminated according to an embodiment of the present invention. At this time, the process of manufacturing the protective sheet will be referred to FIG.

According to FIG. 6, the jig 20 in which the glass portion G is housed is placed on a support 25 such as a conveyor belt or a die moving to a predetermined position. Support 25 may be provided with a separate fixing means for the jig 20 does not move. The supply roll 30 is wound and laminated with a damage preventing film DF for protecting the scattering preventing film RF to the external environment. Before supplying the anti-scattering part film RF to the jig 20, the damage preventing film DF is wound around the take-up roll 32 and continuously separated. The scattering preventing film RF from which the damage preventing film DF has been removed is supplied onto the jig 20, and is continuously bonded to the glass part G by the pressing roller 31. As described above, the anti-scattering film RF may not be adhered or partially adhered to the surface of the jig 20, but may be easily removed in post processing.

On the other hand, the scattering prevention film (RF) can be supplied by the release film 16, as described in FIG. That is, even when the protective sheet 10 implements the anti-scattering portion R with the adhesive layer and the adhesive layer without the synthetic resin layer 14, the embodiment of the present invention can be applied. At the beginning of the lamination process, the method of attaching the anti-scattering part film (RF) to the jig 20 may be performed manually, but a separate device for attaching may be used. After the continuous lamination process is completed, the protective sheet may be completed by cutting the shatterproof portion R to a size corresponding to the glass portion G with a blade or a laser and then removing the scrap.

In addition, by cutting the outer shatterproof film (RF) in the unit of the jig 20 with a blade or a laser, the jig 20 is separated, and then the shatterproof portion with a size that corresponds to the glass portion (G) with a blade or a laser. The protective sheet can also be completed by cutting and removing scrap. When laminating in roll form, if the projecting height of the glass part G in the jig 20 is equal to the height of the jig or 0.15 mm or less, physical collision occurs at the point where the protective sheet meets the adhesive roller unlike the conventional art. Can be prevented. Accordingly, while laminating continuously easily, the protection sheet 10 is fundamentally prevented from being damaged by physical collision.

7 is a view schematically showing a process of cutting the scattering prevention film (RF) according to an embodiment of the present invention. At this time, the process of manufacturing the protective sheet will be referred to FIG. In addition, the scattering prevention film (RF) can be cut with a blade or a laser, but the case of using a laser will be described here.

According to FIG. 7, the cutter 40 includes an irradiator 42 for irradiating a laser and a cutter body 41 for supporting the irradiator 42 and controlling movement. The cutter 40 can move back and forth, left and right and up and down with respect to the jig 20. On the other hand, the cutter 40 is fixed, and the support 25 can move back and forth, left and right, and up and down with respect to the cutter 40. The glass part G may have an opening for exposing a button, a camera, a speaker, and the like. In some cases, the shatterproof portion R may have a predetermined margin inside the glass portion G. Having the margin, it is possible to prevent the transparent adhesive layer 13 from flowing out of the glass part G. The margin is not necessarily limited to this, but is preferably larger than 0 mm and 0.2 mm or less. Of course, the protective sheet 10 may be cut 1: 1 in the glass portion (G) shatterproof portion (R) without a margin.

The cutter 40 cuts the scattering prevention part film RF in consideration of the opening and the margin. At this time, the output value of the laser may be determined differently depending on the type of synthetic resin and the adhesive forming the scatter preventing part film (RF). By the cutter 40, the shatterproof film RF is divided into scraps except for the shatterproof portion R and the shatterproof portion R. After removing the scrap, the jig 20 is secured to the protective sheet 10 consisting of the shatterproof portion (R) and the glass portion (G). The process of removing scrap can be done manually, but a separate device can be used.

Thereafter, the protective sheet 10 may be attached to the cover film 11 by a separate process or may be attached by the cell-to-roll cell method of the present invention. The cover film 11 may not be attached depending on the type of the protective sheet 10, the demand of the consumer, and the use environment.

As mentioned above, although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is possible.

Explanation of the sign

10; Protective sheet 11; Cover film

12; Glass layer 13; Transparent adhesive layer

14; Synthetic resin layer 15; Transparent adhesive layer

16; Release film 20; Jig

21; Receiving groove 22; Alignment mark

25; Support 30; Feeding roll

31; Pressing roller 32; Winding roll

40; Cutter 41; Cutter body

42; Investigation

G; Glass part R; Shatterproof Department

RF; Shatterproof film DF; Damage prevention film

Claims

Preparing a jig having an accommodating groove accommodating a glass portion in a cell form and having an alignment mark engraved therein to identify the glass portion;

Accommodating at least one glass part in the form of a cell in the receiving groove;

Continuous roll-bonding and laminating the glass part housed in the jig while removing the damage preventing film of the scattering part film to form the shatterproof part in the glass part;

Cutting the scattering prevention part film corresponding to the glass part; And

Method for manufacturing a protective sheet for a touch screen panel using a jig comprising the step of separating the scrap except for the shatterproof portion corresponding to the glass in the shatterproof portion film.
The method of claim 1, wherein the glass layer included in the glass part has a thickness of 0.5 mm or less.
The method for manufacturing a protective sheet for a touch screen panel according to claim 1, wherein, in the jig, the position coordinates of the accommodation groove are set in advance.
The method according to claim 1, wherein the receiving groove coincides with the contour of the glass part or is larger than 0.1 mm from the glass part.
The method of claim 1, wherein the glass portion protrudes from the jig has a height of 0 mm to 0.15 mm or less.
The method of claim 1, wherein the alignment mark is formed in a jig that is inside the receiving groove or outside of the receiving groove.
The method of claim 1, wherein the number of the alignment marks is set at least two or more so as to recognize the accommodation groove.
The method according to claim 1, wherein the jig, except for the receiving groove, includes a surface roughness or a coated anti-stick layer.
The method of claim 1, wherein the jig is any one selected from a metal, a ceramic, and a polymer, or a mixed layer in which the jig is stacked.
The method of claim 1, wherein the scattering prevention unit coincides with the glass unit or is formed with a margin of 0.2 mm or less inside the glass unit.
A protective sheet prepared by any one of claims 1 to 10.