JP2019172732A - Auxiliary sheet and method for manufacturing the same, and bonding method of film for display by using auxiliary sheet - Google Patents

Abstract

To provide an auxiliary sheet by which positioning of a film for display onto a display area of a display can be easily performed, and a method for manufacturing thereof, and a bonding method of the film for display by using the auxiliary sheet.SOLUTION: A sheet body 11 of an auxiliary sheet 1 has one surface 111 and the other surface 112, and an adhesive layer 13 is formed on the other surface 112. In the sheet body 11, the one surface 111 is temporarily fixed on an adhesive surface 211 of the film for display 2. By bonding the one surface 111 of the sheet body 11 on a part of the adhesive surface 211 of the film for display 2, and bonding and positioning the adhesive layer 13, which is formed on the other surface 112 of the sheet body 11, on a display area 31 of a display 3, positioning of the film for display 2 can be easily performed.SELECTED DRAWING: Figure 4A

Description

  The present invention relates to an auxiliary sheet temporarily attached to the adhesive surface of the display film when the display film is attached to a display area of the display, a method for manufacturing the auxiliary sheet, and a method for attaching a display film using the auxiliary sheet. It is about.

  A film (display film) may be attached to the display of various devices such as a mobile phone, a smartphone, a game machine, or a tablet terminal in order to protect the display area. This type of film usually has a configuration in which an adhesive surface is formed on the surface of a flat thin film, and the film is attached to a flat display region via the adhesive surface.

  In recent years, in particular, some smartphones have a shape in which the peripheral edge of the display area is curved. In such a smartphone, the entire surface including the peripheral edge of the main body is a display area. The main body has a design in which the peripheral portion is curved, and the display area is also curved so as to follow the curvature of the peripheral portion of the main body.

  When a conventional flat film is attached to the curved display area as described above along the curve, there is a problem that the film is easily peeled off from the peripheral edge due to the elastic force of the film. Therefore, a film having a curved peripheral edge corresponding to the curved display area has been commercially available as a film dedicated to each model.

  On the other hand, in a conventional flat film, a separator is bonded to the adhesive surface of the film, and after the separator is peeled to expose the adhesive surface, the adhesive surface is bonded to the display area. In some conventional films, the separator is divided into a plurality of sheets by forming cuts in the separator (see Patent Document 1 below). In this case, the film can be easily aligned because the adhesive surface of the film can be attached to the display region step by step while sequentially separating the divided separators.

JP, 2015-203090, A

  As for a film having a curved peripheral edge, there is currently no commercially available separator. This is due to the fact that when a film having a curved peripheral edge is formed by press forming, the boundary (cut) of the divided separator remains on the adhesive surface of the film due to the pressure.

  Therefore, when a film having a curved peripheral edge is attached to the display region, all the separators are peeled off and the entire adhesive surface is attached to the display region, which makes it difficult to align. In particular, the adhesive surface of this type of film is generally more adhesive than conventional flat film adhesive surfaces, and once attached to the display area, it is not easy to peel off. , Positioning was even more difficult.

  The film having a configuration in which the separator is not divided is not limited to a film having a curved peripheral edge as described above, and there has been a problem that alignment is difficult in the past. Therefore, there has been a demand for a configuration that can easily align the film with the display area of the display.

  The present invention has been made in view of the above circumstances, and an auxiliary sheet capable of easily aligning the display film with respect to the display area of the display, a manufacturing method thereof, and a display film using the auxiliary sheet. The purpose of this is to provide a method of attaching.

(1) The auxiliary sheet | seat which concerns on this invention is an auxiliary | assistant sheet | seat temporarily fixed to the adhesive surface of the said film for a display, when a display film is affixed on the display area of a display, Comprising: A sheet | seat main body is provided. The sheet body has one surface and the other surface, and an adhesive layer is formed on the other surface. The one side of the sheet body is temporarily fixed to the adhesive surface of the display film.

  According to such a configuration, the display film can be aligned with the display area of the display using the sheet body of the auxiliary sheet. That is, by sticking one surface of the sheet body to a part of the adhesive surface of the display film, and positioning the adhesive layer formed on the other surface of the sheet body to the display area of the display, The display film can be easily aligned with the display area of the display.

(2) It is preferable that the adhesive force of the adhesive layer is weaker than the adhesive force of the adhesive surface of the display film.

  According to such a configuration, when the adhesive layer of the auxiliary sheet is bonded to the display area, the display film can be peeled off more easily than when the adhesive surface of the display film is directly bonded to the display area. It is easy to position the auxiliary sheet repeatedly. Therefore, the display film can be more easily aligned with the display area of the display.

(3) The auxiliary sheet may further include a peelable protective film bonded to the one surface.

  According to such a configuration, one surface of the sheet main body can be protected by the protective film. Further, when the protective film is peeled from the sheet main body, the foreign matter on one surface of the sheet main body adheres to the protective film side, so that one surface of the sheet main body can be kept free of foreign matters. . Thereby, when one surface of the sheet main body is bonded to the adhesive surface of the display film, foreign matter can be prevented from being transferred to the adhesive surface from the sheet main body side. Therefore, when a display film is subsequently attached to the display area, foreign matter can be prevented from entering between the display film and the display area.

(4) A positioning mark for temporarily fixing the one surface to the adhesive surface of the display film may be formed on the sheet body.

  According to such a configuration, one surface of the sheet main body can be accurately positioned with respect to the adhesive surface of the display film using the positioning mark. Therefore, it is possible to further easily align the display film with respect to the display area of the display.

(5) In the method for manufacturing an auxiliary sheet according to the present invention, the other surface of the additional sheet having the adhesive layer formed on one surface is bonded to the other surface of the sheet body.

  According to such a configuration, the auxiliary sheet can be easily manufactured by simply attaching the additional sheet to the other surface of the sheet main body.

(6) In the method for attaching a display film according to the present invention, a part of the adhesive surface of the display film is bonded to one surface of the sheet body, and then the adhesive layer of the sheet body is used as a display area of the display. After attaching the remaining part of the adhesive surface of the display film to the display area, the sheet body is peeled from a part of the adhesive surface of the display film, and the adhesive surface Is pasted on the display area.

  According to such a structure, it can position by sticking the sheet | seat main body of an auxiliary | assistant sheet | seat first to the film for displays, and bonding the adhesive layer of the sheet | seat main body to the display area of a display. After the positioning is performed in this manner, the adhesive surface of the display film can be attached to the display area, so that the display film can be easily aligned with the display area of the display.

(7) Another method for attaching a display film according to the present invention is to stick the adhesive layer of the sheet main body to the display area of the display, and then position the adhesive on the display film on one surface of the sheet main body. After pasting a part of the surface and pasting the remaining part of the adhesive surface of the display film to the display area, the sheet body is peeled from a part of the adhesive surface of the display film, and the adhesive A part of the surface is pasted on the display area.

  According to such a configuration, the adhesive layer of the sheet main body of the auxiliary sheet can be pasted and positioned in the display area of the display first, and the sheet main body can be bonded to the adhesive surface of the display film. After the positioning is performed in this manner, the adhesive surface of the display film can be attached to the display area, so that the display film can be easily aligned with the display area of the display.

  According to the present invention, one surface of the sheet main body is bonded to a part of the adhesive surface of the display film, and the adhesive layer formed on the other surface of the sheet main body is bonded to the display area of the display for positioning. By doing so, alignment of the film for a display can be performed easily.

It is the side view which showed the structural example of the auxiliary sheet | seat which concerns on one Embodiment of this invention. It is a top view which shows the state in which the auxiliary sheet was temporarily fixed to the display film. It is the side view which showed an example of the manufacturing method of an auxiliary sheet. It is the side view which showed the flow at the time of sticking the film for a display on the display area of a display using an auxiliary sheet. It is the side view which showed the flow at the time of sticking the film for a display on the display area of a display using an auxiliary sheet. It is the side view which showed the flow at the time of sticking the film for a display on the display area of a display using an auxiliary sheet. It is the side view which showed the flow at the time of sticking the film for a display on the display area of a display using an auxiliary sheet.

  Below, embodiment of the auxiliary sheet | seat which concerns on this invention is described in detail. In addition, each layer of the auxiliary sheet and the display film illustrated in the following embodiments is shown with a thickness larger than the actual thickness for easy understanding of the description.

1. Configuration of Auxiliary Sheet FIG. 1 is a side view showing a configuration example of an auxiliary sheet 1 according to an embodiment of the present invention. The auxiliary sheet 1 is a sheet that is used auxiliary to align the display film when the display film is attached to the display area of the display. The auxiliary sheet 1 is formed by laminating a sheet body 11, a protective film 12, an adhesive layer 13, a separator 14, and the like.

  The sheet body 11 is configured by a transparent thin sheet formed of, for example, PET (polyethylene terephthalate). However, the material of the sheet body 11 is not limited to PET, and may be other materials such as glass. The sheet body 11 may not be transparent, but is preferably transparent or translucent from the viewpoint of aligning the display film using the auxiliary sheet 1.

  A mold release process is performed on one surface 111 of the sheet body 11. The mold release process is a process for facilitating peeling from the adhesive surface, and the adhesive force to the surface subjected to the mold release process is smaller than that of the surface not subjected to the mold release process. Examples of the mold release treatment include fluorine treatment or silicon treatment. However, the one surface 111 of the sheet body 11 may not be subjected to the mold release process.

  An adhesive layer 13 is formed on the other surface 112 of the sheet body 11. The adhesive layer 13 is a thin layer formed of, for example, a silicon adhesive. A separator 14 is bonded to the opposite side of the adhesive layer 13 from the sheet body 11 side. The adhesive force of the separator 14 to the adhesive layer 13 is smaller than the adhesive force of the sheet body 11 to the adhesive layer 13. Therefore, the separator 14 can be peeled from the adhesive layer 13 while the adhesive layer 13 is adhered to the sheet body 11 side.

  The protective film 12 is configured by a masking sheet having an adhesive layer 121 formed on one surface. The protective film 12 has an adhesive layer 121 bonded to one surface 111 of the sheet body 11. Since the one surface 111 of the sheet body 11 is subjected to the mold release process, the protective film 12 can be peeled off without the adhesive layer 121 being transferred to the surface 111.

  When aligning the film for display using the auxiliary sheet 1, first, the protective film 12 is peeled from the sheet body 11, so that one surface 111 of the sheet body 11 is exposed. Then, one surface 111 of the sheet body 11 is temporarily fixed to the adhesive surface of the display film.

2. FIG. 2 is a plan view showing a state where the auxiliary sheet 1 is temporarily fixed to the display film 2. The display film 2 is attached to the display area in order to protect the display area of the display of various devices such as a mobile phone, a smartphone, a game machine, or a tablet terminal.

  The display film 2 is formed by laminating a film body 21 and a separator 22. The separator 22 is bonded to an adhesive surface 211 formed on one surface of the film body 21, and the separator 22 can be peeled from the adhesive surface 211 of the film body 21 as shown in FIG. 2.

  The peripheral edge of the film body 21 may be curved toward the separator 22 side. Some devices (particularly smartphones) to which the display film 2 is attached have a design in which the peripheral portion of the display area is curved, and the film body 21 of the display film 2 applied to such a device is curved. The peripheral part is formed in a curved shape corresponding to the display area. However, the film body 21 is not limited to a shape having a curved peripheral edge portion, and may be a flat shape as a whole.

  As shown in FIG. 2, when temporarily fixing the auxiliary sheet 1 to the display film 2, first, only a part of the separator 22 of the display film 2 is peeled, and a part of the adhesive surface 211 is exposed. Then, the sheet main body 11 is temporarily fixed to the display film 2 by bonding one surface 111 of the sheet main body 11 from which the protective film 12 has been peeled off to a part of the exposed adhesive surface 211.

  The sheet main body 11 is formed with a positioning mark 113 for temporarily fixing one surface 111 to the adhesive surface 211 of the display film 2. The mark 113 includes, for example, a plurality of vertical lines 114 extending in parallel with each other and a plurality of horizontal lines 115 extending in parallel with each other, and is a lattice-shaped mark in which the vertical lines 114 and the horizontal lines 115 intersect. When the sheet main body 11 is temporarily fixed to the adhesive surface 211 of the display film 2, the sheet main body 11 is adhered to the adhesive surface 211 so that one of the horizontal lines 115 is along one side 212 of the film main body 21 of the display film 2. Are pasted together.

  However, the mark 113 is not limited to the grid-shaped mark composed of the vertical lines 114 and the horizontal lines 115, and may be any mark that can position the sheet body 11 at a fixed position with respect to the adhesive surface 211 of the display film 2. Any landmark can be used. For example, the mark 113 may be composed of only one of the vertical line 114 and the horizontal line 115, or may be composed of one straight line. The straight line is not limited to a solid line, but may be another line type such as a dotted line. Or the L-shaped mark etc. corresponding to the corner | angular part of the film main body 21 of the film 2 for a display may be sufficient. Furthermore, the mark 113 may be formed not by a line but by a protrusion, a hole, or an unevenness. In this case, by punching from the other surface 112 side of the sheet main body 11, the punched portion protrudes to the one surface 111 side of the sheet main body 11, and positioning with respect to the display film 2 is performed using this protrusion as a mark. May be. When a hole (for example, a hole for a speaker) is formed in the display film 2, the positioning can be further facilitated by hooking the protrusion into the hole.

3. Example of Manufacturing Method of Auxiliary Sheet The auxiliary sheet 1 as illustrated in FIG. 1 can be formed by simply laminating the sheet body 11, the protective film 12, the adhesive layer 13, and the separator 14 in the order shown in FIG. . However, the auxiliary sheet 1 can be manufactured not only by this method but also by the method described below.

  FIG. 3 is a side view illustrating an example of a method for manufacturing the auxiliary sheet 1. In this example, the auxiliary sheet 1 is manufactured by bonding the additional sheet 15 to the sheet body 11. The protective sheet 12 is bonded to one surface 111 of the sheet body 11 before the auxiliary sheet 1 is manufactured, but nothing is bonded to the other surface 112, and the surface 112 is exposed. It is in a state.

  The additional sheet 15 is a sheet in which the adhesive layer 13 and the separator 14 described above are laminated on one surface, and an adhesive layer 151 is formed on the other surface. The adhesive sheet 151 of the additional sheet 15 is bonded to the other surface 112 of the sheet body 11. Thereby, the auxiliary sheet 1 in which the sheet main body 11, the protective film 12, the adhesive layer 13, the separator 14, and the additional sheet 15 are laminated can be manufactured.

  The adhesive layer 151 is formed of, for example, an acrylic or urethane adhesive, and the adhesive strength thereof is stronger than the adhesive strength of the adhesive layer 13. Therefore, when the separator 14 is peeled from the manufactured auxiliary sheet 1, it is possible to prevent the pressure-sensitive adhesive layer 151 from being peeled from the sheet main body 11. According to the manufacturing method illustrated in FIG. 3, the auxiliary sheet 1 can be easily manufactured by simply attaching the additional sheet 15 to the other surface 112 of the sheet body 11.

4). 4A to 4D are side views showing a flow when the display film 2 is attached to the display area 31 of the display 3 using the auxiliary sheet 1. . In this example, a case where the display film 2 has a flat shape will be described.

  When the auxiliary sheet 1 is used, first, the protective film 12 of the auxiliary sheet 1 is peeled to expose one surface 111 (surface subjected to the mold release process) of the sheet body 11. Moreover, when the separator 22 of the display film 2 is peeled from one end partway, a part of the adhesive surface 211 is exposed. Then, as shown in FIG. 4A, a part of the adhesive surface 211 of the exposed display film 2 is bonded to one surface 111 of the sheet body 11 of the auxiliary sheet 1, whereby the auxiliary sheet 1 is Temporarily fixed to the display film 2.

  Thereafter, the separator 14 is peeled off from the sheet body 11 of the auxiliary sheet 1 to expose the adhesive layer 13, and the adhesive layer 13 is bonded to the display area 31 of the display 3 and positioned as shown in FIG. 4B. Is done. At this time, positioning is performed using the mark 113 on the sheet body 11 as shown in FIG. The adhesive strength of the adhesive layer 13 of the auxiliary sheet 1 is weaker than the adhesive strength of the adhesive surface 211 of the display film 2. Therefore, when the position of the display film 2 is not accurately positioned with respect to the display area 31, the display film 2 is easily peeled from the display area 31 together with the auxiliary sheet 1, and again with respect to the display area 31. Positioning can be performed by pasting together.

  In this way, after the display film 2 is positioned with respect to the display region 31, the remaining part of the separator 22 of the display film 2 is peeled off. As a result, the remaining part of the adhesive surface 211 of the display film 2 is exposed, and the part is attached to the display region 31 as shown in FIG. 4C. At this time, since the display film 2 is positioned in the display area 31 via the auxiliary sheet 1, the remaining portion of the adhesive surface 211 of the display film 2 can be accurately attached to the display area 31. .

  Thereafter, the sheet body 11 of the auxiliary sheet 1 is peeled off from the adhesive surface 211 of the display film 2, so that a part of the adhesive surface 211 (a portion not attached to the display region 31) is exposed. Then, by sticking the portion of the adhesive surface 211 to the display region 31, the entire adhesive surface 211 of the display film 2 is attached to the display region 31 as shown in FIG. 4D.

  Thus, positioning can be performed by pasting the sheet main body 11 of the auxiliary sheet 1 to the display film 2 first and pasting the adhesive layer 13 of the sheet main body 11 to the display region 31 of the display 3. Since the adhesive surface 211 of the display film 2 can be attached to the display area 31 after positioning in this way, the display film 2 can be easily aligned with the display area 31 of the display 3. it can.

5. Effect (1) In this embodiment, the display film 2 can be aligned with the display area 31 of the display 3 by using the sheet body 11 of the auxiliary sheet 1. That is, as shown in FIG. 4B, the one surface 111 of the sheet body 11 is bonded to a part of the adhesive surface 211 of the display film 2 and the adhesive layer 13 formed on the other surface 112 of the sheet body 11. Can be easily aligned with the display area 31 of the display 3 by attaching the film to the display area 31 of the display 3 and positioning it.

(2) Moreover, in this embodiment, since the adhesive force of the adhesive layer 13 of the auxiliary sheet 1 is weaker than the adhesive force of the adhesive surface 211 of the display film 2, the adhesive layer 13 of the auxiliary sheet 1 is displayed in the display area 31. In the case of bonding, the adhesive surface 211 of the display film 2 can be peeled off more easily than in the case of directly bonding to the display region 31. Thereby, it is easy to repeatedly position the auxiliary sheet 1 with respect to the display area 31. Therefore, alignment of the display film 2 with respect to the display area 31 of the display 3 can be performed more easily.

(3) Furthermore, in this embodiment, the one surface 111 of the sheet body 11 can be protected by the protective film 12. Further, when the protective film 12 is peeled from the sheet main body 11, the foreign matter on the one surface 111 of the sheet main body 11 adheres to the protective film 12 side (adhesive layer 121). It is possible to keep the surface 111 free from foreign matter. Thereby, when one surface 111 of the sheet main body 11 is bonded to the adhesive surface 211 of the display film 2, it is possible to prevent foreign matter from being transferred to the adhesive surface 211 from the sheet main body 11 side. Therefore, when the display film 2 is subsequently attached to the display area 31, foreign matter can be prevented from entering between the display film 2 and the display area 31.

(4) In the present embodiment, one surface 111 of the sheet main body 11 is attached to the display film 2 using the positioning mark 113 (see FIG. 2) formed on the sheet main body 11 of the auxiliary sheet 1. It can be accurately positioned with respect to the surface 211. Therefore, the alignment of the display film 2 with respect to the display area 31 of the display 3 can be more easily performed.

6). Modification of Display Film Attaching Method Using Auxiliary Sheet In the above embodiment, the sheet main body 11 of the auxiliary sheet 1 is first bonded to the display film 2, and then the adhesive layer 13 of the sheet main body 11 is attached to the display 3 The sticking method of sticking to the display area 31 has been described. However, the configuration is not limited to this, and the adhesive layer 13 of the sheet body 11 of the auxiliary sheet 1 is first bonded to the display area 31 of the display 3, and then the sheet body 11 is adhered to the adhesive surface 211 of the display film 2. A pasting method such as pasting may be used.

  In this case, first, the adhesive layer 13 is exposed by peeling the separator 14 from the sheet body 11 of the auxiliary sheet 1, and the adhesive layer 13 is bonded to the display region 31 of the display 3 and positioned. Thereafter, the protective film 12 of the auxiliary sheet 1 is peeled off, so that one surface 111 (surface subjected to the mold release process) of the sheet body 11 is exposed. Moreover, when the separator 22 of the display film 2 is peeled from one end partway, a part of the adhesive surface 211 is exposed. Then, as shown in FIG. 4B, a part of the adhesive surface 211 of the exposed display film 2 is bonded to one surface 111 of the sheet body 11 of the auxiliary sheet 1, whereby the auxiliary sheet 1 is Temporarily fixed to the display film 2.

  In this way, after the display film 2 is positioned with respect to the display region 31, the remaining part of the separator 22 of the display film 2 is peeled off. As a result, the remaining part of the adhesive surface 211 of the display film 2 is exposed, and the part is attached to the display region 31 as shown in FIG. 4C. Thereafter, the sheet body 11 of the auxiliary sheet 1 is peeled off from the adhesive surface 211 of the display film 2, so that a part of the adhesive surface 211 (a portion not attached to the display region 31) is exposed. Then, by sticking the portion of the adhesive surface 211 to the display region 31, the entire adhesive surface 211 of the display film 2 is attached to the display region 31 as shown in FIG. 4D.

  Thus, in the above modification, the adhesive layer 13 of the sheet main body 11 of the auxiliary sheet 1 is pasted and positioned on the display area 31 of the display 3 in advance, and the sheet main body 11 is attached to the adhesive surface 211 of the display film 2. Can be pasted together. Since the adhesive surface 211 of the display film 2 can be attached to the display area 31 after positioning in this way, the display film 2 can be easily aligned with the display area 31 of the display 3. it can.

DESCRIPTION OF SYMBOLS 1 Auxiliary sheet 2 Display film 3 Display 11 Sheet main body 12 Protective film 13 Adhesive layer 14 Separator 15 Additional sheet 21 Film main body 22 Separator 31 Display area 111 One surface 112 Other surface 113 Mark 121 Adhesive layer 151 Adhesive layer 211 Adhesive surface

Claims (7)

When the display film is attached to the display area of the display, an auxiliary sheet temporarily fixed to the adhesive surface of the display film,
A sheet body having one surface and the other surface, and an adhesive layer formed on the other surface;
The auxiliary sheet, wherein the one surface is temporarily fixed to the adhesive surface of the display film.   The auxiliary sheet according to claim 1, wherein the adhesive force of the adhesive layer is weaker than the adhesive force of the adhesive surface of the display film.   The auxiliary sheet according to claim 1, further comprising a peelable protective film bonded to the one surface.   The said sheet | seat main body is formed with the mark for positioning at the time of temporarily fixing said one surface to the adhesive surface of the said film for a display, It is any one of Claims 1-3 characterized by the above-mentioned. Auxiliary sheet. It is a manufacturing method of the auxiliary sheet according to any one of claims 1 to 4,
A method for manufacturing an auxiliary sheet, wherein the other surface of the additional sheet having the adhesive layer formed on one surface is bonded to the other surface of the sheet body. A method for attaching a display film using the auxiliary sheet according to any one of claims 1 to 4,
After pasting a part of the adhesive surface of the display film on one surface of the sheet body, the adhesive layer of the sheet body is pasted and positioned on the display area of the display, and the adhesive surface of the display film After the remaining portion is pasted on the display area, the sheet body is peeled off from a part of the adhesive surface of the display film, and a part of the adhesive surface is pasted on the display area. A method for attaching a film for display. A method for attaching a display film using the auxiliary sheet according to any one of claims 1 to 4,
After the adhesive layer of the sheet body is pasted and positioned on the display area of the display, a part of the adhesive surface of the display film is pasted on one surface of the sheet body, and the remaining adhesive surface of the display film After the part is pasted on the display area, the sheet body is peeled off from a part of the adhesive surface of the display film, and a part of the adhesive surface is pasted on the display area. Method of attaching film.

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