TW201338984A - Device for producing and method for producing laminate body - Google Patents

Abstract

The present invention provides a method for producing a laminate body such that when pasting together a first surface material (A) and a second surface material (B) with a resin layer (2) therebetween, it is possible to favorably paste together the entire surfaces to be pasted together, it is difficult for air bubbles to remain between the pasted together surfaces, and it is difficult for peeling to arise at the edges after pasting together.

Description

Manufacturing method and manufacturing device of laminated body

The present invention relates to a method and apparatus for producing a laminate by bonding face materials to each other via a resin layer.

For example, when an integrated protective sheet is laminated on a display surface of a flat panel display (FPD) or a touch panel display device, or when the glass sheets are integrated with each other to form a laminated glass, it is important to make the display surface No air bubbles are generated between the protective sheets.

Patent Document 1 discloses that in the step of manufacturing an EL (Electro Luminescence) display device, a resin layer is formed by applying or printing a resin on a light-emitting element substrate, and a mask substrate is superposed thereon. In the method of performing vacuum evacuation and heat-hardening and sealing the resin, it is easy to leave air bubbles in the inside of the resin layer.

Further, as a method for improving the above, a method is proposed in which a resin adhesive is disposed in a central portion of one substrate, and the other substrate is bent into a convex shape, and the top of the convex surface is brought into contact with the resin adhesive, and another A substrate is sequentially restored to a flat shape from the top to the outer peripheral portion of the convex surface, whereby the resin adhesive is stretched and bonded.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent No. 3932660

However, in the case of Patent Document 1, the substrate is bent and the resin adhesive is extended one by one. In the method of bonding the surface, there is a problem that the resin adhesive layer after bonding is not uniform, and an area where the bonding is insufficient is generated. In addition, when the amount of the resin adhesive is large, the outer periphery of the substrate overflows. If the resin adhesive is insufficient, the adhesion at the peripheral portion is insufficient and the peeling is likely to occur.

The present invention has been made in view of the above circumstances, and an object of the invention is to provide a method in which the entire surface of the bonding surface can be favorably bonded when the surface materials are bonded to each other via the resin layer, and it is not easy to remain between the bonding surfaces. A method for producing a laminated body in which bubbles are not easily peeled off from the peripheral portion after bonding, and a device for manufacturing a laminated body.

That is, the present invention relates to the following 1. to 9.

1. A method for producing a laminated body, which is characterized in that a first surface material and a second surface material in which a resin layer is provided on a surface of at least one of the surface materials are bonded together to produce a laminated body, and The method includes: a step of facing and contacting a surface of the first surface material and the second surface material on which the resin layer is provided; and a first bonding step of contacting the first surface material with the second surface material Pressure is applied to a central portion of the surface to bond the central portion of the contact surface; and a second bonding step is performed after bonding the central portion of the contact surface to the first surface material and the second surface material The peripheral portion of the peripheral surface portion is pressed by a pressure in a direction in which the distance between the first surface material and the second surface material is reduced, thereby bonding the peripheral edge portion of the contact surface.

2. The method for producing a laminate according to claim 1, wherein the first and second bonding steps are performed by pressing the first face material and the second face member to the contact surface. The first pressing surface of the substantially spherical shape which is convex is bent and bonded.

3. The method of manufacturing a laminated body according to 2., wherein the second bonding step is performed by bringing a second pressing surface connected to the peripheral portion pressing member closer to the first pressing surface direction. The peripheral portion of the contact surface is bonded to each other.

4. The method for producing a laminate according to any one of the preceding claims, wherein, in the first bonding step, the bonding surface of the first face material and the contact between the first face material and the second face material The surface is flat.

5. The method for producing a laminate according to any one of the preceding claims, wherein, in the first and second bonding steps, an average value of a pressure applied to a peripheral portion of the contact surface is the contact surface. The average value of the pressure on the whole is above.

6. The method for producing a laminate according to any one of the preceding claims, wherein the measurement points of the pressure applied to the contact surface are arranged in a square lattice at intervals of 10 mm, and the first and the first In the 2 bonding step, the maximum value of the pressure to be applied is 245 Pa or more at any of the above measurement points.

7. A device for manufacturing a laminated body, which is characterized in that a first surface material and a second surface material in which a resin layer is provided on a surface of at least one of the surface materials are bonded together to produce a laminated body. Furthermore, the support unit is configured to support the first and second face materials in a state in which the surface on which the resin layer is provided is opposed to each other, and the opposing portion is coaxially opposed to the support portion; and the driving unit And the distance between the support portion and the opposing portion is changed; and any one of the support portion and the opposing portion includes a first spherical pressing surface that is curved toward the other and is substantially spherical, and the other A peripheral portion pressing member that can partially press the peripheral portion of the first and second face materials is provided.

8. The apparatus for manufacturing a laminated body according to 7, wherein the peripheral edge pressing member includes a second pressing surface that is bendable into a substantially spherical shape.

9. The apparatus for manufacturing a laminated body according to 7. or 8. further comprising an inclination adjusting unit that maintains a central axis of the first pressing surface and a central axis of the contact surface coaxially.

Further, the present invention relates to the following [1] to [9].

[1] The method for producing a laminated body according to the present invention, characterized in that it is a method of producing a laminated body in which a first face material (A) is aligned with respect to the first face material (A) The second face material (B) is bonded together via a resin layer provided on the bonding surface of the first face material (A) and/or the bonding surface of the second face material (B), and the manufacturing is performed. The method includes the step (1) of facing the first surface material (A) and the second surface material (B) so that the bonding surface is inside, and the first surface material (A), the resin layer, and The second surface material (B) is in contact with each other at a central portion of the bonding surface, and a first spherical pressing surface (C) and a first surface that are curved toward the first surface material (A) are formed into a convex shape. The outer surface of the material (A) is opposed to each other, and only the portion corresponding to the central portion of the bonding surface of the outer surface of the first surface material (A) is in contact with the first pressing surface (C); and the step (2) After the step (1), a pressure is applied to a portion corresponding to the peripheral portion of the bonding surface in a direction in which the distance between the first pressing surface (C) and the second surface material (B) is reduced. The bonding surface of the first pressing surface (C) and/or the second surface material (B) is deformed, and the first pressing surface (C), the first surface material (A), the resin layer, and the second surface material are deformed. (B) The first face material (A) and the second face material (B) are bonded to each other in close contact with each other.

[2] Preferably, in the above step (2), as a method of deforming at least the bonding surface of the second face material (B), in the step (1), the film can be bent into a substantially spherical shape. 2, the pressing surface (D) faces the outer surface of the second surface material (B), and the second pressing surface (D) is in contact with at least the outer surface of the second surface material (B) and the center of the bonding surface In the portion corresponding to the portion, in the step (2), the pressure is applied to the second face material (B) via the second pressing surface (D).

[3] Preferably, in the above step (1), the bonding surface of the first face material (A) and the bonding surface of the second face material (B) are planar.

[4] Preferably, in the above step (2), the average value of the pressure applied to the peripheral portion of the bonding surface at the time point when the bonding is completed is equal to or higher than the average value of the pressure applied to the entire bonding surface.

[5] Preferably, when the measurement points of the pressure applied to the bonding surface are arranged in a square lattice shape at intervals of 10 mm, all the measurement points on the entire bonding surface are from the above steps. (1) The maximum value of the pressure which is received during the period from the time when the members are brought into contact until the end of the bonding in the step (2) is 245 Pa or more.

[6] The apparatus for manufacturing a laminated body according to the present invention is characterized in that the first surface material (A) and the second surface material (B) disposed opposite to the first surface material (A) are disposed via a device for bonding a resin layer on the bonding surface of the first surface material (A) and/or the bonding surface of the second surface material (B) to produce a laminated body, and comprising: a support portion The first surface material (A) and the second surface material (B) are opposed to each other such that the bonding surface of the first surface material (A), the resin layer, and the second surface material (B) are opposed to each other. Supporting the state of the temporary laminated body in contact with each other at the central portion of the bonding surface; the opposing portion sandwiching the supporting portion and the temporary laminated body and facing each other coaxially; and a driving unit for causing the supporting portion and the pair The distance from the portion to the portion is changed; any one of the support portion and the opposing portion includes a first spherical pressing surface (C) that is curved to be convex toward the temporary laminated body, and the other includes the above A peripheral portion pressing member that is partially pressed at a portion corresponding to a peripheral portion of the bonding surface of the temporary laminated body.

[7] Preferably, the second pressing surface (D) including the second pressing surface (D) which is bendable into a substantially spherical shape and which can be in close contact with the outer surface of the temporary laminated body is provided between the peripheral edge pressing member and the temporary laminated body. The second pressing member.

[8] The manufacturing apparatus of the laminated body of the present invention is characterized in that the first surface material (A) and the second surface material (B) disposed opposite to the first surface material (A) are passed via An apparatus for producing a laminated body by bonding a resin layer provided on a bonding surface of the first face material (A) and/or a bonding surface of the second face material (B), and comprising: a support portion The first surface material (A) and the second surface material (B) are opposed to each other such that the bonding surface of the first surface material (A) and the second surface material (B) are inside, and the first surface material (A), the resin layer, and the second surface material (B) can be used. ) supporting at least the state of the temporary laminated body in contact with each other at the central portion of the bonding surface; a facing portion that sandwiches the support portion and the temporary laminated body and that faces coaxially; and a driving unit that changes a distance between the support portion and the opposing portion; and the support portion and the opposing portion One of the pressing members including the first pressing surface (C) which is curved in a convex shape toward the temporary laminated body and which is deformed in a convex shape so as to be deformable in a radius of curvature, and the pressing member A peripheral portion pressing member that is partially pressed against the temporary laminated body at a portion corresponding to the peripheral edge portion of the bonding surface.

[9] It is preferable that the manufacturing apparatus of the laminated body of the present invention further includes an inclination adjusting unit that holds the central axis of the first pressing surface (C) and the central axis of the bonding surface coaxially.

[10] A preferred embodiment of the method for producing a laminated body according to the present invention is a method for producing a laminated body, which comprises using the manufacturing apparatus of the above [6], and the first surface material (A) and the first surface material The second surface material (B) disposed opposite to the surface material (A) is passed through a resin layer provided on the bonding surface of the first surface material (A) and/or the bonding surface of the second surface material (B). A method of bonding a laminate to form a laminate, comprising the step (1) of bringing the first surface material (A) and the second surface material (B) into contact with each other by the support portion In the state in which the first surface material (A), the resin layer, and the second surface material (B) are in contact with each other at least in the central portion of the bonding surface, the first surface material (A) The outer side surface is supported so as to face the first pressurizing surface (C), and only the portion corresponding to the central portion of the bonding surface of the outer surface of the first surface material (A) and the first pressing surface are provided. (C) contacting; and step (2), after the step (1), driving the driving unit such that the distance between the supporting portion and the opposing portion is reduced, by the peripheral portion pressing member The part corresponding to the peripheral part of the fitting surface By applying pressure, the bonding surface of the second face material (B) is deformed, and the first pressing surface (C), the first surface material (A), the resin layer, and the second surface material (B) are mutually exchanged. The first surface material (A) and the second surface material (B) are bonded together by close contact.

[11] Alternatively, a preferred embodiment of the method for manufacturing a laminate of the present invention is a In the manufacturing method of the laminated body, the first surface material (A) and the second surface material (B) disposed opposite to the first surface material (A) are used in the manufacturing apparatus described in the above [8]. A method of producing a laminated body by bonding a resin layer provided on a bonding surface of the first face material (A) and/or a bonding surface of the second face material (B), and comprising: a step (1) In the support portion, the first surface material (A) and the second surface material (B) are opposed to each other such that the bonding surfaces of the first surface material (A) and the second surface material (B) are inside, and the first surface material (A), The resin layer and the second surface material (B) are opposed to the first pressure surface (C) at the outer surface of the first surface material (A) at least in a state in which the center layer portion of the bonding surface is in contact with each other. In this manner, only the portion of the outer surface of the first face material (A) corresponding to the central portion of the bonding surface is brought into contact with the first pressing surface (C); and the step (2) is performed by the step ( 1), the drive unit is driven to reduce the distance between the support portion and the opposing portion, and the peripheral portion pressing member applies pressure to a portion of the pressing member corresponding to the peripheral edge portion of the bonding surface. Thereby, the first pressing surface is made ( C) deformation, the first pressing surface (C), the first surface material (A), the resin layer, and the second surface material (B) are in close contact with each other, thereby making the first surface material (A) and the second surface material (B) Fit.

According to the method for producing a laminate of the present invention, the face materials are bonded to each other via the resin layer, whereby the entire surface of the bonding surface can be favorably bonded, and air bubbles remain between the bonding surfaces. Moreover, peeling of the peripheral portion is less likely to occur after bonding.

According to the method for producing a laminate of the present invention, the face materials are bonded to each other via the resin layer, whereby the entire surface of the bonding surface can be favorably bonded, and air bubbles remain between the bonding surfaces. Moreover, peeling of the peripheral portion is less likely to occur after bonding.

1‧‧‧Transparent surface material

2‧‧‧ resin layer

3‧‧‧ glass plate

4‧‧‧protection board

10‧‧‧Support components

11‧‧‧Under the abutment

11a‧‧‧ convex

12‧‧‧ Peripheral extrusion members

13‧‧‧Intermediate board

13a‧‧‧ The opposite side of the intermediate plate and the lower abutment side

21‧‧‧Underground support

21a‧‧‧Spherical seat

23‧‧‧Flange

24‧‧‧Support

30‧‧‧ Pressurization

31‧‧‧Abutment

31a‧‧‧ convex

32‧‧‧ Peripheral extrusion members

33‧‧‧Intermediate board

33a‧‧‧ The opposite side of the intermediate plate and the upper abutment side

35‧‧‧Connecting Department

35a‧‧‧ side

35b‧‧‧ bottom

40‧‧‧Decompression chamber

41‧‧‧ Container

41a‧‧‧ openings

42‧‧‧ cover

42a‧‧‧ cover inner surface

43‧‧‧ Sealing members

44‧‧‧Rubber washers

50‧‧‧Decompression chamber

51‧‧‧ Container

51a‧‧‧ openings

52‧‧‧ Cover

61‧‧‧Upper abutment support components

61a‧‧‧Spherical seat

63‧‧‧Flange

64‧‧‧Support

65‧‧‧Flexible connecting members

71‧‧‧ Lower pressure plate

71a‧‧‧ Upper surface of the lower platen

72‧‧‧Under the pressure plate

73‧‧‧Intermediate board

73a‧‧‧Under the middle plate

A, B, C‧‧‧ pressure measurement points

(A)‧‧‧1st face material

(B) ‧‧‧2nd face material

(C) ‧‧‧1st pressing surface

(D) ‧‧‧2nd pressing surface

P‧‧‧ center axis

X‧‧‧ layering direction

Fig. 1 is a cross-sectional view showing a first embodiment of the present invention.

Fig. 2 is a cross-sectional view showing a first embodiment of the present invention.

3(a) to 3(c) are cross-sectional views showing an embodiment of a peripheral portion pressing member.

4(a) to 4(d) are plan views showing an embodiment of the shape and arrangement of the support portion.

Fig. 5 is a cross-sectional view showing a second embodiment of the present invention.

Fig. 6 is a cross-sectional view showing a modification (1) of the second embodiment.

7(a) to 7(d) are plan views showing an embodiment of the shape and arrangement of the support portion and the elastic connecting member.

Fig. 8 is a cross-sectional view showing a modification (2) of the second embodiment.

Fig. 9 is a plan view showing an embodiment of the configuration of the elastic connecting member.

Fig. 10 is a cross-sectional view showing a modification (3) of the second embodiment.

Fig. 11 is a cross-sectional view showing a modification (4) of the second embodiment.

12(a) to 12(d) are plan views showing an embodiment of the shape and arrangement of the support portion and the elastic connecting member.

Figure 13 is a cross-sectional view showing a third embodiment of the present invention.

Figure 14 is a cross-sectional view showing a third embodiment of the present invention.

Figs. 15(a) and 15(b) are views showing an example of temporal changes in the pressure applied to the bonding surface, wherein Fig. 15(a) is an explanatory view of the measuring point, and Fig. 15(b) is a view showing the pressure. A chart of changes in time.

In the present invention, the term "surface material" means a member having a surface to be bonded, and is, for example, a plate-like, sheet-like, or film-like member.

In the present invention, the central axis of the face refers to the axis passing through the center of the face and perpendicular to the face. The central axis of the surface of the surface refers to the axis perpendicular to the tangential plane of the center of the surface. The so-called coaxial system means that the central axes are identical.

In the present invention, the surface that is curved into a substantially spherical shape means a surface in which any cross section is curved.

In the present invention, the direction in which the center of the resin layer is parallel to the thickness direction of the resin layer is set to the lamination direction X in the laminate in which the two surface materials are bonded via the resin layer.

In the present invention, the bonding surface refers to the surface of the region where the two sheets of the surface material and the resin layer completely overlap each other when the laminated body is observed from the lamination direction X (hereinafter also referred to as the first surface material and the first surface). 2 contact surface of the face material).

In the present invention, the pressure applied to the bonding surface in the bonding step is such that the bonding surface of the first face material (A), the resin layer, the sensor sheet, and the second face material (B) The bonding surface is placed in the opposite direction in this order, and the pressure distribution in the bonding surface in the step is measured over time. In the present invention, the sensing plate is formed by arranging pressure sensors (measurement points) in a square lattice shape at equal intervals of 10 mm in two directions (x direction, y direction) which are straight in the plane of the sheet. There is a measurement point at the position of the lattice point of the square lattice. The sensor panel can be used by a commercially available person for surface pressure distribution measurement.

The average value of the pressure applied to the entire surface of the bonding surface is the total of the measured values of the pressure sensors (measuring points) present on the entire surface of the bonding surface divided by the number of the pressure sensors (measuring points). value.

The average value of the pressure applied to the peripheral portion of the bonding surface is the total of the measured values of the pressure sensors (measuring points) present at the peripheral portion of the bonding surface divided by the number of the pressure sensors (measuring points) The value obtained. The peripheral portion of the bonding surface means a strip-shaped region having a width of 10 mm along the entire circumference of the outer edge of the bonding surface.

In the present invention, the point in time at which the bonding is completed is the time point at which the distance between the first pressing surface (C) and the second surface material (B) at the outer edge of the bonding surface is minimized. In the case where the step of holding the distance between the first pressurizing surface (C) and the second surface material (B) is minimized in the peripheral portion of the bonding surface, the holding step is ended. Set to the point in time at which the fit ends.

<First embodiment>

Figs. 1 and 2 are cross-sectional views showing a first embodiment of a method for producing a laminate according to the present invention. Fig. 1 shows the state before the bonding starts, and Fig. 2 shows the state at the time of bonding.

In the present embodiment, a preferred tree for the protective panel for the display panel is listed. A method of bonding a transparent face material of a fat layer to a glass plate as a substitute for a display panel will be described as an example. The transparent surface material with a resin layer is described in detail.

The reference numeral 4 in the figure is a protective plate, and a resin having an adhesive thickness of 0.4 mm is provided on the entire surface of the bonding surface of the transparent surface material 1 (the first surface material (A)) containing the soda lime glass having a thickness of 1.8 mm. Layer 2. Reference numeral 3 in the figure is a glass plate (second face material (B)), and contains soda lime glass having a thickness of 1.8 mm. The protective plate 4 and the glass plate 3 are both rectangular, and the protective plate 4 is larger than the glass plate 3.

In Figs. 1 and 2, the lamination direction X is a vertical direction.

[Manufacturing device for laminated body]

The apparatus used in the present embodiment accommodates the support member 10 and the support portion that moves the support member 10 in the lamination direction X below the base support 21 in the decompression chamber 40.

The decompression chamber 40 includes a container 41 having an open upper end and a lid 42 (opposing portion) that closes the opening 41a in an airtight manner. The shape of the opening 41a when viewed from the lamination direction X may be a point symmetry, and may be a circle, an ellipse, a rectangle, a polygon, or the like. In the present embodiment, it is circular.

The lid body 42 includes a substantially spherical member that is bent toward the inner side to be convex when the decompression chamber 40 is depressurized. In the present embodiment, a plate made of an acrylic resin and having a thickness of 75 mm was used. Reference numeral 43 in the figure is a sealing member for hermetically sealing the opening portion 41a, for example, a rubber gasket is used.

In the present embodiment, the inner surface (the inner surface of the lid) 42a of the lid body 42 is the first pressing surface (C).

The support member 10 is provided with a peripheral edge pressing member 12 for pressing the peripheral edge portion of the glass sheet 3 on the lower base 11, and an intermediate plate 13 (second pressing member) is provided thereon. The intermediate plate 13 is a member that can be bent into a substantially spherical shape. In the present embodiment, a plate made of stainless steel (SUS304) having a thickness of 5 mm is included. The middle plate 13 is opposite to the lower base 11 side The side surface 13a is in close contact with the second pressing surface (D) on the outer surface of the glass sheet 3.

The lower base 11 and the peripheral portion pressing member 12 may be in contact only or may be fixed next. The peripheral portion pressing member 12 and the intermediate plate 13 may be in contact only or may be fixed.

Further, for example, when the intermediate plate 13 is made of metal or the like, when the glass plate 3 is damaged or broken by contact with the intermediate plate 13, in order to prevent the above, the intermediate plate 13 and the glass plate 3 are A resin film or the like may be inserted between them.

The peripheral portion pressing member 12 may be such that the peripheral portion can be partially pressed so that the pressure applied to the peripheral portion of the bonding surface becomes larger than the pressure applied to the inner side of the peripheral portion. In the present embodiment, the shape of the peripheral portion pressing member 12 when viewed from the lamination direction X may be, for example, a continuous frame shape as shown in Fig. 3(a). Alternatively, as shown in FIG. 3(b), the shape may be extruded only at the corners, or may be a discontinuous frame shape as shown in FIG. 3(c).

In order to prevent peeling in the laminated body, the peripheral portion pressing member 12 is preferably disposed so as to impart a higher pressure to the outer edge of the bonding surface and its vicinity. Therefore, it is preferable that the peripheral edge pressing member 12 exists over the peripheral portion of the bonding surface and the outer portion thereof when viewed from the lamination direction X.

The material of the peripheral portion pressing member 12 is preferably such that the uniformity in the circumferential direction is easy to increase the pressure applied to the peripheral edge portion of the bonding surface, and is preferably the same as the face material constituting the laminated body (glass plate 3 and The transparent face material 1) of the protective sheet 4 is lower than the elastic modulus. For example, use a sponge or rubber.

The lower base support 21 is configured to penetrate the center of the bottom of the container 41 in an airtight manner, and can advance and retreat in the lamination direction X by a drive unit (not shown). Reference numeral 44 in the figure is a rubber gasket.

In the present embodiment, the upper surface of the lower base 11 is formed coaxially with the upper surface of the intermediate plate 13. Further, the central axis of the inner surface 42a of the cover in the opening 41a of the container 41 coincides with the central axis of the lower base support 21, and is indicated by a symbol P in the figure.

In the present embodiment, the lower base 11 is not fixed to the lower base support 21, and is provided to set the central axis of the upper surface of the lower base 11 and the upper surface of the intermediate plate 13 and the central axis P of the inner surface 42a of the cover. The tilt adjustment unit (the convex portion 11a, the spherical seat 21a, and the support portion 24) that are coaxial is held.

That is, a convex portion 11a having a spherical outer surface is provided at the center of the lower surface of the lower base 11, and a spherical seat including a spherical concave portion slidable with the convex portion 11a is provided at the upper end of the lower base support 21. 21a. The central axis of the spherical seat 21a is P. The inclination of the upper surface of the lower base 11 is changed by sliding the convex portion 11a of the lower surface of the lower base 11 in the spherical seat 21a. The radius of curvature of the inner surface of the spherical seat 21a is preferably substantially equal to the distance from the inner surface of the spherical seat 21a to the bonding surface.

Further, the lower base support 21 is provided with a flange portion 23 below the spherical seat 21a. On the flange portion 23, a support portion 24 including an elastic body (rubber, sponge, etc.) is provided in such a manner as to be in contact with one of the flange portion 23 and the lower base 11 or the other Contact or follow or have a slight gap.

By providing the support portion 24 in this manner, the upper surface of the lower base 11 can be prevented from being extremely inclined.

The support portion 24 is not particularly limited as long as it is disposed uniformly around the spherical seat 21a. 4 is a view schematically showing an example of the shape and arrangement of the spherical seat 21a, the flange portion 23, and the support portion 24 when viewed from the stacking direction X. 4(a) shows an example in which four cylindrical support portions 24 are arranged at equal intervals around the spherical seat 21a on the rectangular flange portion 23, and FIG. 4(b) is attached to the rectangular flange portion 23. An example in which the support member 24 having a rectangular frame shape is disposed around the spherical seat 21a. Fig. 4(c) shows an example in which three cylindrical support portions 24 are arranged at equal intervals around the spherical seat 21a on the disk-shaped flange portion 23, and Fig. 4(d) is a disc-shaped convex portion. An example in which the annular support portion 24 is disposed around the spherical seat 21a is formed in the edge portion 23.

[Manufacturing method of laminated body]

In the manufacture of a laminate using the apparatus of the present embodiment, first, in the support structure The glass plate 3 and the protective plate 4 are placed on the intermediate plate 13 of the member 10 such that the bonding surface is inside. At this time, the central axis of the bonding surface is made coaxial with the central axis P.

In the present embodiment, the glass plate 3 is placed at a specific position on the intermediate plate 13 so that the bonding surface is the upper surface, and the resin layer 2 is placed on the lower surface at a specific position thereon, and is placed and protected. Board 4. As a result, the resin layer 2 of the protective sheet 4 is in a state of being in contact with the glass sheet 3 due to its own weight.

Further, the inside of the decompression chamber 40 is depressurized, and the inner surface 42a of the lid is bent into a substantially spherical shape having a specific curvature (if the opening portion 41a is circular, it is substantially spherically symmetrical). The pressure reduction in the decompression chamber 40 may be performed before the glass plate 3 is brought into contact with the resin layer 2, or may be performed simultaneously with the step of contacting, or may be performed after the contact.

Then, in a state where the cover inner surface 42a is bent, the lower base support 21 is driven to raise the support member 10, and the upper surface (outer side surface) of the protective plate 4 is brought into contact with the cover inner surface 42a (step (1)).

At this time, first, the state in which the top surface of the inner surface 42a of the cover which is bent into a substantially spherical shape is in contact with the center of the upper surface of the protective plate 4, and the inner surface 42a of the cover, the protective plate 4, and the glass plate 3 are in contact with each other. .

Then, if the support member 10 is further raised, the contact between the inner surface 42a of the cover and the protective plate 4 comes into surface contact, and the protective plate 4 and the glass plate 3 are pressed by the force of pressing the intermediate plate 13 to the inner surface 42a of the cover. Pressure is applied to the central part. Thereby, first, the central portion of the bonding surface is partially bonded to each other.

Then, as shown in FIG. 2, when the shape of the inner surface 42a of the lid is fixed, the support member 10 is further raised, and the peripheral portion pressing member 12 is applied to the portion corresponding to the peripheral edge portion of the bonding surface. The pressure in the direction in which the distance between the glass sheet 3 and the protective sheet 4 is reduced. Thereby, the intermediate plate 13, the glass plate 3, and the protective plate 4 are deformed so as to follow the shape of the inner surface 42a of the cover, and the region where the protective plate 4 and the glass plate 3 are pressurized is gradually expanded from the central portion toward the peripheral edge. Therefore, the bubbles existing between the resin layer 2 and the glass plate 3 can be discharged while being discharged. Make the two close together and fit together (step (2)).

Thereby, the center portion of the self-bonding surface is bonded to the peripheral portion in order, and the intermediate plate 13 is deformed until the upper surface of the intermediate plate 13 and the inner surface 42a of the cover are parallel, whereby the entire surface of the bonding surface can be made. fit.

Thereafter, it is preferable that the support member 10 is further raised, and the vicinity of the periphery of the bonding surface is particularly firmly adhered to complete the bonding.

That is, if the upper surface of the intermediate plate 13 and the inner surface 42a of the cover are parallel, and the support member 10 is further raised, the peripheral portion of the intermediate plate 13 is partially pressed by the peripheral portion pressing member 12, and the intermediate plate 13 is further deformed. The radius of curvature of the intermediate plate 13 is slightly smaller than the radius of curvature of the inner surface 42a of the cover. Thereby, the pressure applied to the peripheral edge portion of the bonding surface becomes larger than the pressure applied to the inner side of the peripheral edge portion, so that the peripheral edge portion of the bonding surface can be particularly firmly adhered and less likely to be peeled off.

After the bonding is completed, the support member 10 is lowered to release the pressure on the bonding surface.

Fig. 15 is a view showing an example of temporal changes in pressure applied to the bonding surface in the present embodiment. In Fig. 15(a), the symbol A indicates the measurement point existing at the center of the bonding surface, and the symbol C indicates the measurement point located at the peripheral edge portion of the bonding surface (for example, 5 mm inside from the outer edge of the bonding surface). , symbol B represents the measurement point located at the midpoint between A and C. Fig. 15 (b) is a graph showing the temporal change of the pressure applied to the bonding surface at each of the measurement points of A to C, with the horizontal axis as the time and the vertical axis as the pressure.

In the graph, the pressure at each measurement point of A to C before the upper surface (outer side surface) of the protective plate 4 is to be in contact with the inner surface 42a of the cover is set as a reference (zero).

(i) of the horizontal axis is a time point as follows, that is, a state in which the protective plate 4 and the glass plate 3 are supported on the intermediate plate 13 of the support member 10 in a state of a temporary laminated body, and the lower base support 21 is driven. The support member 10 is raised, and the top end of the cover inner surface 42a is in contact with the center of the upper surface of the protective plate 4.

In (i) to (ii) of the horizontal axis, the support member 10 is further raised, and the inner surface 42a of the cover is protected. The contact of the shield 4 is in surface contact, and the center portion of the bonding surface is partially bonded.

The horizontal axis (ii) is the time point at which the intermediate plate 13, the glass plate 3, and the protective plate 4 start to deform along the shape of the inner surface 42a of the cover.

In (ii) to (iv) of the horizontal axis, with the rise of the support member 10, the center portion of the self-bonding surface is sequentially bonded to the peripheral portion, and on the horizontal axis (iv), the upper surface of the intermediate plate 13 is The lid inner surface 42a is parallel, and the entire surface of the bonding surface is bonded.

In (iv) to (v) of the horizontal axis, the support member 10 is further raised, and the peripheral portion of the bonding surface is particularly firmly adhered. The (v) of the horizontal axis is the time point at which the bonding is completed, and immediately thereafter, the support member 10 is lowered, and the pressure is released at all the measurement points.

The time required for each of (i) to (ii) to (iii) to (iv) to (v) on the horizontal axis becomes longer as the bonding surface becomes larger, for example, the bonding surface is the length of the long side 50. The case of the rectangle of cm is as follows.

(i) to (ii) from the horizontal axis, that is, the time from the contact of the first face material (A) with the first pressurizing surface (C), up to the first pressurizing surface (C) and/or the second surface The time from the start of the deformation of the bonding surface of the material (B) (the deformation of the bonding surface of the second surface material (B) in the present embodiment) is preferably about 0.1 to 10 seconds.

(ii) to (iv) from the horizontal axis, that is, after the start of the above-described deformation, the time until the region where the first face material (A) and the second face material (B) are bonded to the entire surface of the bonding surface is preferable. It is about 0.1 to 100 seconds, more preferably about 0.5 to 10 seconds. When the bonding time is equal to or greater than the lower limit of the above range, the air existing between the first face material (A) and the second face material (B) is easily discharged to the outside to prevent the remaining of the bubbles. If the bonding time is less than or equal to the upper limit of the above range, it is preferable in terms of industrially good production efficiency.

Further, when the entire surface of the bonding surface is bonded and the peripheral portion of the bonding surface is firmly adhered to each other, (iv) to (v) of the horizontal axis, that is, the bonded region is brought into conformity. The time from the entire surface of the surface to the end of the bonding is preferably about 0.1 to 100 seconds, and more preferably about 0.5 to 10 seconds. If the time is above the lower limit of the above range, the time can be easily obtained. The adhesion improving effect of the peripheral portion obtained by pressing the entire peripheral surface of the bonding surface and then pressing the peripheral edge portion of the bonding surface is obtained. If the time is less than or equal to the upper limit of the above range, it is preferable in terms of easy to obtain industrially good production efficiency.

In this case, it is preferable that the average value of the pressure applied to the peripheral portion of the bonding surface is the average of the pressures to be applied to the entire bonding surface when the bonding is completed (the (v) on the horizontal axis). the above.

In the present embodiment, after the cover inner surface 42a is brought into contact with the protective plate 4, the support member 10 is raised to press the intermediate plate 13 to the inner surface 42a of the cover, and the central axis of the upper surface of the intermediate plate 13 is used. The central axis P of the inner surface 42a of the cover is offset, that is, the upper surface of the intermediate plate 13 is inclined with respect to a plane (horizontal plane) perpendicular to the central axis P, by lowering the convex portion 11a of the lower surface of the lower base 11 to the lower base The spherical seat 21a of the table support 21 slides, and the inclination is corrected, and the upper surface of the intermediate plate 13 is kept coaxial with the inner surface 42a of the cover. Thereby, the central axis of the bonding surface can be kept coaxial with the central axis of the inner surface 42a of the cover, and as the support member 10 rises, the bonded region can be evenly distributed from the central portion to the peripheral portion of the bonding surface. The reproducibility is well expanded.

In the present embodiment, the curvature radius of the inner surface 42a of the cover is reduced in a state in which the inner surface 42a of the cover is substantially spherical, and the protective plate 4 is first pressed against the top of the inner surface 42a of the cover. The smaller the bonding area when the central portion of the joint is partially bonded. The smaller the bonding area, the more difficult it is to bite the air bubbles. For example, the radius of curvature of the inner surface 42a of the cover is preferably 100,000 mm (100 m) or less, more preferably 10,000 mm (10 m) or less.

The lower limit of the radius of curvature of the inner surface 42a of the cover is also dependent on the material or the thickness, so that the cover 42 is not easily broken or the protective plate 4, the glass plate 3 or the intermediate plate is deformed along the inner surface 42a of the cover. In terms of the damage of 13, for example, it is preferably 100 mm (0.1 m) or more, and more preferably 1000 mm (1 m) or more.

Moreover, the pressure applied to the bonding surface is preferably set in such a manner as to accompany When the support member 10 rises, the bubble existing between the resin layer 2 and the glass plate 3 can be reliably discharged to the outside, and the entire surface of the bonding surface can be surely bonded.

For example, it is preferable that all the measurement points existing on the entire surface of the bonding surface are in a period from the time point when the inner surface 42a of the cover body, the protective plate 4, and the glass plate 3 are in contact with each other until the end of the bonding. The maximum value of the pressure to be measured over time is 245 Pa or more at any of the measurement points.

In the present embodiment, the pressure applied to the bonding surface can be controlled by a driving unit that changes the distance between the supporting portion and the opposing portion. For example, if the drive unit is a cylinder, it can be controlled by air pressure, and if it is a servo motor, it can be controlled by torque.

According to the present embodiment, the protective sheet 4 (the transparent surface material 1 having the resin layer 2) and the glass sheet 3 can be surely bonded together without leaving air bubbles. Further, by extrusion using the peripheral portion pressing member, in particular, the vicinity of the outer edge of the glass sheet 3 can be easily adhered to the resin layer, and a laminate which is less likely to be peeled off can be obtained.

Further, in the present embodiment, the glass plate 3 and the protective plate 4 are brought into contact with each other in a state in which the bonding surface is planar, and the temporary laminated body is in a state of being in contact (in a state of contact), so that the glass plate can be easily formed. 3 is aligned with the position of the protective plate 4, and the positional deviation after the positional alignment is less likely to occur.

Further, in the present embodiment, when the support member 10 is raised and the intermediate plate 13 is bent, the shape of the inner surface 42a of the cover is kept constant, but the intermediate plate 13 may be deformed while being applied to the facing surface. The shape of the inner surface 42a of the cover is deformed in a direction from a substantially spherical shape to a flat surface within a range in which the pressure is not lowered. That is, both the first pressurizing surface (C) and the second surface material (B) may be deformed at the time of bonding.

Further, in the present embodiment, the inner surface 42a of the lid is curved into a substantially spherical shape by depressurizing the inside of the decompression chamber 40. However, the present invention is not limited thereto, and the outer surface of the lid 42 may be applied. The central portion is pressurized to bend the inner surface 42a of the lid. In this case, the pressure in the decompression chamber 40 may also be normal pressure.

<Second embodiment>

Fig. 5 is a cross-sectional view showing the second embodiment and showing the state before the start of bonding. The same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and their description will be omitted.

The present embodiment differs greatly from the first embodiment in that, in the first embodiment, the inner surface 42a of the lid as the first pressing surface (C) is placed above and protected from the lower side. In the present embodiment, the upper surface of the lower platen 71 is the first pressing surface (C), and the protective plate 4 is provided from above. The glass plate 3 is pressed to deform it.

In the present embodiment, the upper surface 71a of the platen 71 as the first pressing surface (C) is disposed opposite to the outer surface of the glass sheet 3. That is, in the present embodiment, the glass sheet 3 is the first surface material (A), and the transparent surface material 1 of the protective sheet 4 is the second surface material (B).

[Manufacturing device for laminated body]

The apparatus used in the present embodiment accommodates an opposing portion in the decompression chamber 50, the opposing portion substantially including: a lower pressing plate 71 (supporting portion); and a pressing portion 30 including and pressing The disk 71 is opposed to the intermediate plate 33; and the upper base supporting member 61 moves the pressing portion 30 in the lamination direction X.

The decompression chamber 50 includes a container 51 having an open upper end and a lid 52 that hermetically closes the opening 51a.

On the bottom surface of the decompression chamber 50, a platen 71 having a larger area than the protective plate 4 and the glass plate 3 is disposed. The upper surface of the lower platen 71 is formed in a substantially spherical shape that is convex upward. In the present embodiment, the material of the platen 71 is an aluminum alloy (A5052).

In the present embodiment, the upper surface 71a of the lower platen 71 is the first pressing surface (C).

Further, a resin film or the like may be inserted between the lower platen 71 and the glass plate 3.

The pressurizing unit 30 is provided with a peripheral edge pressing member 32 for pressing a portion corresponding to the peripheral edge portion of the glass sheet 3 on the lower surface of the upper base 31, and an intermediate plate 33 is fixed to the lower surface thereof. The intermediate plate 33 is the same as the intermediate plate 13 in the first embodiment. Intermediate plate 33 The surface 33a opposite to the side of the upper base 31 can be in close contact with the second pressing surface (D) on the outer surface of the protective plate 4.

The peripheral portion pressing member 32 is the same as the peripheral portion pressing member 12 of the first embodiment.

The upper base supporting member 61 is configured to penetrate the center of the lid body 52 in an airtight manner, and can advance and retreat in the lamination direction X by a driving unit (not shown).

In the present embodiment, the lower surface of the upper base 31 is formed coaxially with the lower surface of the intermediate plate 33. Further, the central axis of the upper surface 71a of the lower platen 71 coincides with the central axis of the upper abutment supporting member 61, and is the central axis P.

In the present embodiment, a convex portion 31a having a spherical outer surface is provided at the center of the upper surface of the upper base 31, and a spherical surface slidable with the convex portion 31a is provided at the lower end of the upper base support member 61. The spherical seat 61a of the recess. The central axis of the spherical seat 61a is P.

The upper base 31 is not fixed to the upper base supporting member 61, and the flange portion 63 provided above the spherical seat 61a is coupled to the upper surface of the upper base 31 by an elastic connecting member 65 such as a coil spring. The convex portion 31a of 31 can slide in the spherical seat 61a.

The convex portion 31a of the upper base 31 slides in the spherical seat 61a, and the inclination of the lower surface of the upper base 31 changes. Further, the elastic connecting member 65 also functions to prevent the lower surface of the upper base 31 from being extremely inclined. That is, the convex portion 31a, the spherical seat 61a, and the elastic connecting member 65 constitute a central axis P for lowering the lower surface of the upper base 31 and the lower surface of the intermediate plate 33, and a central axis P of the upper surface 71a of the lower platen 71 Keep it as a coaxial tilt adjustment unit.

The radius of curvature of the inner surface of the spherical seat 61a is preferably substantially equal to the distance from the inner surface of the spherical seat 61a to the bonding surface.

Further, a resin film or the like may be inserted between the intermediate plate 33 and the protective plate 4.

[Manufacturing method of laminated body]

In the production of the laminated body by the apparatus of the present embodiment, first, the glass plate 3 and the protective plate 4 are placed on the lower platen 71 so that the bonding surface is inside. At this time, the central axis of the bonding surface is made to be coaxial with the central axis P.

In the present embodiment, the glass plate 3 is placed on the lower platen 71 at a specific position such that the bonding surface is the upper surface, and the protective plate 4 is placed on the lower surface of the resin layer 2 and placed thereon. Specific location. Thereby, the resin layer 2 of the protective sheet 4 is in contact with the glass plate 3 due to its own weight at least in the central portion of the bonding surface.

At this time, only the central portion of the lower surface of the glass plate 3 comes into contact with the temporary laminated body bent to the top of the upper surface 71a of the platen 71 under the substantially spherical shape due to its own weight (step (1)).

Then, the upper base supporting member 61 is driven to lower the pressing portion 30, and the intermediate plate 33 is brought into contact with the upper surface (outer side surface) of the protective plate 4.

When the pressurizing portion 30 is further lowered, pressure is applied to the central portion of the protective plate 4 and the glass plate 3 by pressing the intermediate plate 33 against the upper surface 71a of the lower platen 71. Thereby, first, the central portion of the bonding surface is partially bonded to each other.

Thereafter, when the pressurizing portion 30 is further lowered, the intermediate plate 33, the protective plate 4, and the glass plate 3 are deformed so as to follow the shape of the upper surface 71a of the lower platen 71.

Therefore, similarly to the first embodiment, the region where the protective plate 4 and the glass plate 3 are pressurized can be gradually enlarged from the central portion to the peripheral edge, and the two can be bonded together (step (2)).

According to this embodiment, the same effects as those of the first embodiment can be obtained.

Further, in the present embodiment, the upper surface 71a of the platen 71 as the first pressing surface (C) can be formed into an arbitrary curved surface by mechanical processing, so that it can be easily and accurately controlled. The radius of curvature of the first pressing surface (C).

Further, in terms of facilitating the miniaturization of the device, it is preferable that the elevating mechanism for changing the distance between the support portion and the opposing portion is disposed in the lower first embodiment.

<Modification (1)>

Fig. 6 is a cross-sectional view showing a main part of a modification (1) of the embodiment. In the present embodiment, as the tilt adjusting unit, in addition to the convex portion 31a, the spherical seat 61a, and the elastic connecting member 65, an elastic body (rubber, sponge) is also provided between the flange portion 63 and the upper base 31. The support portion 64 of the device.

The support portion 64 is provided in contact with one of the flange portion 63 and the upper base 31 or with a slight gap with the other. By providing the support portion 64 in this way, the lower surface of the upper base 31 is prevented from being extremely inclined.

In this example, the support portion 64 may be disposed uniformly around the spherical seat 61a, and the shape and arrangement thereof are not particularly limited.

FIG. 7 is a view schematically showing an example of the shape and arrangement of the spherical seat 61a, the flange portion 63, the support portion 64, and the elastic connecting member 65 when viewed from the lamination direction X. Fig. 7(a) shows an example in which four cylindrical support portions 64 are arranged at equal intervals around the spherical seat 61a on the rectangular flange portion 63, and four elastic connecting members 65 are disposed on the outer side. The support portion 64 and the elastic connecting member 65 are disposed on the diagonal line of the flange portion 63.

Fig. 7(b) is a rectangular flange portion 63. The four-frame-shaped support portion 64 is disposed around the spherical seat 61a, and four elastic connecting members 65 are disposed on the outer side. The elastic connecting member 65 is disposed on a diagonal line of the flange portion 63.

Fig. 7(c) is a disk-shaped flange portion 63, and three cylindrical support portions 64 are disposed at equal intervals around the spherical seat 61a, and three elastic connecting members 65 are circumferentially disposed on the outer side. An example in which the directions are equally spaced. The support portion 64 and the elastic connecting member 65 are arranged side by side in the diameter direction of the flange portion 63.

7(d), the annular support portion 64 is disposed around the spherical seat 61a on the disk-shaped flange portion 63, and the three elastic connecting members 65 are equally spaced in the circumferential direction on the outer side thereof. Example of configuration.

With the configuration of this example, it is also possible to advance and retract and support the upper base 31 with an adjustable tilt.

<Modification (2)>

Fig. 8 is a cross-sectional view showing a main part of a modification (2) of the embodiment. In this example, the upper surface of the upper base 31 is provided with a flange portion 63 for receiving the upper base supporting member 61. The connecting portion 35. The connecting portion 35 includes a side surface 35a fixed to the upper surface of the upper base supporting member 61 and a bottom surface 35b opposed to the flange portion 63, and the flange portion 63 is coupled to the bottom surface 35b by the elastic connecting member 65. A through hole is provided in the center of the bottom surface 35b, and the upper base support member 61 can pass through and retreat.

Fig. 9 is a view schematically showing an example of the arrangement of the spherical seat 61a, the flange portion 63, and the elastic connecting member 65 when viewed in the laminated direction X of the present example.

With the configuration of this example, it is also possible to advance and retract and support the upper base 31 with an adjustable tilt.

<Modification (3)>

Fig. 10 is a cross-sectional view showing a main part of a modification (3) of the embodiment. In the present modification, in the configuration of the modification (2), the support portion 64 is provided between the flange portion 63 and the upper base 31.

The support portion 64 is provided in contact with one of the flange portion 63 and the upper base 31 or with a slight gap with the other.

In the present example, for example, when the elastic connecting member 65 is disposed in the same manner as in FIG. 9 when viewed from the laminated direction X, the support portion 64 is preferably disposed at a position overlapping the elastic connecting member 65.

With the configuration of this example, it is also possible to advance and retract and support the upper base 31 with an adjustable tilt.

<Modification (4)>

Fig. 11 is a cross-sectional view showing the main part of a modification (4) of the embodiment. In the present modification, in the configuration of the modification (2), the support portion 64 is provided on the outer side of the elastic connecting member 65 between the bottom surface 35b of the coupling portion 35 and the flange portion 63.

The support portion 64 is provided in contact with either or both of the bottom surface 35b and the flange portion 63 of the joint portion 35, and has a slight gap with the other.

Figure 12 is a view schematically showing the spherical seat 61a and the flange when viewed from the lamination direction X. Examples of the shape and arrangement of the portion 63, the support portion 64, and the elastic connecting member 65. Fig. 12 (a) is a rectangular flange portion 63, and four elastic connecting members 65 are disposed at equal intervals around the spherical seat 61a, and four cylindrical support portions 64 are disposed at equal intervals on the outer side. example. The support portion 64 and the elastic connecting member 65 are disposed on the diagonal line of the flange portion 63.

Fig. 12(b) shows an example in which the four elastic connecting members 65 are disposed at equal intervals around the spherical seat 61a, and the four-corner frame-shaped supporting portion 64 is disposed on the rectangular flange portion 63. The elastic connecting member 65 is disposed on a diagonal line of the flange portion 63.

Fig. 12(c) is a disk-shaped flange portion 63, and three elastic connecting members 65 are disposed at equal intervals around the spherical seat 61a, and three cylindrical support portions 64 are circumferentially arranged on the outer side. Examples of arrangements at equal intervals. The support portion 64 and the elastic connecting member 65 are arranged side by side in the radial direction of the flange portion 63.

12(d) is a disk-shaped flange portion 63, and three elastic connecting members 65 are disposed at equal intervals in the circumferential direction around the spherical seat 61a, and an annular support portion 64 is disposed outside the spherical seat portion 61a. An example.

With the configuration of this example, it is also possible to advance and retract and support the upper base 31 with an adjustable tilt.

<Third embodiment>

13 and 14 are cross-sectional views showing a third embodiment. Fig. 13 shows the state before the bonding starts, and Fig. 14 shows the state at the time of bonding. The same components as those in FIGS. 1, 2, and 5 are denoted by the same reference numerals, and their description will be omitted.

The present embodiment differs greatly from the second embodiment in that, in the second embodiment, the upper surface 71a of the platen 71 below the first pressing surface (C) is not deformed. In the present embodiment, the protective plate 4 and the glass plate 3 are deformed, and the lower surface 73a of the intermediate plate 73 as the first pressing surface (C) is not deformed in the present embodiment.

In the present embodiment, the first pressurization is disposed on the outer surface of the protective plate 4 The lower surface 73a of the intermediate plate 73 of the face (C). That is, in the present embodiment, the transparent surface material 1 of the protective sheet 4 is the first surface material (A), and the glass plate 3 is the second surface material (B).

[Manufacturing device for laminated body]

In the apparatus used in the present embodiment, the upper surface of the lower platen 72 (support portion) is a flat surface.

The intermediate plate 73 (pressing member) in the present embodiment includes a member which is formed in a substantially spherical shape having a desired curvature in advance, and which is deformable into a flat surface by pressing the peripheral edge portion thereof. In the present embodiment, a plate made of an aluminum alloy (A5052) having a thickness of 3 mm is processed into a substantially spherical shape by, for example, press working.

In the present embodiment, the pressurizing portion 30 is fixed to the lower surface of the upper base 31 by a peripheral edge pressing member 32 for pressing a portion of the intermediate plate 73 corresponding to the peripheral edge portion of the bonding surface. An intermediate plate 73 is fixed to the lower surface.

Further, a resin film or the like may be inserted between the lower platen 72 and the glass plate 3. A resin film or the like may be inserted between the intermediate plate 73 and the protective plate 4.

[Manufacturing method of laminated body]

In the production of the laminated body by the apparatus of the present embodiment, first, the glass plate 3 and the protective plate 4 are placed on the lower platen 72 such that the bonding surface is inside. At this time, the central axis of the bonding surface is made coaxial with the central axis P.

In the present embodiment, the glass plate 3 is placed at a specific position on the lower platen 72 so that the bonding surface is the upper surface, and the protective plate 4 is placed thereon in such a manner that the resin layer 2 becomes the lower surface. position. As a result, the resin layer 2 of the protective sheet 4 is in a state of being in contact with the glass sheet 3 due to its own weight.

Then, the upper base supporting member 61 is driven to lower the pressing portion 30, and the intermediate plate 73 is brought into contact with the upper surface (outer side surface) of the protective plate 4 (step (1)).

At this time, first, the state is such that the top surface of the lower surface 73a of the intermediate plate 73 bent into a substantially spherical shape is in contact with the center of the upper surface of the protective plate 4, under the intermediate plate 73. The surface 73a, the protective plate 4, and the glass plate 3 are in contact with each other.

Then, if the pressurizing portion 30 is further lowered, the contact of the lower surface 73a of the intermediate plate 73 with the protective plate 4 comes into surface contact, and the protective plate 4 is pressed by the force of pressing the intermediate plate 73 to the lower pressing plate 71. Pressure is applied to the central portion of the glass plate 3. Thereby, first, the central portion of the bonding surface is partially bonded to each other.

Thereafter, as shown in FIG. 14, when the pressurizing portion 30 is further lowered, the lower surface 73a of the intermediate plate 73 is gradually deformed into a flat surface from a substantially spherical shape.

Thereby, the region where the protective plate 4 and the glass plate 3 are pressurized is gradually enlarged from the central portion to the peripheral edge. Therefore, similarly to the first embodiment, the air bubbles existing between the resin layer 2 and the glass plate 3 can be discharged and adhered to each other (step (2)).

Further, after the lower surface 73a of the intermediate plate 73 and the upper surface of the lower platen 72 are parallel, the pressurizing portion 30 is lowered, and the peripheral portion of the intermediate plate 73 is partially pressed by the peripheral portion pressing member 32. Thereby, the pressure applied to the peripheral portion of the bonding surface can be made larger than the pressure applied to the inner side of the peripheral portion.

According to this embodiment, the same effects as those of the first embodiment can be obtained.

Further, in particular, in the present embodiment, the laminate having no warpage is easily obtained from the viewpoint that the bonding surface is flat at the end of bonding.

[Transparent surface material with resin layer]

Hereinafter, a preferred configuration of a transparent face material having a resin layer will be described.

The transparent surface material having a resin layer includes a protective sheet (transparent surface material), a light-shielding portion printed on a peripheral portion of the surface of the protective sheet, and a resin layer formed on the surface of the protective sheet on the side where the light-shielding portion is formed. The surface of the resin layer is covered by a peelable protective film after the manufacture of the transparent face material having the resin layer until use.

The protective plate is provided on the image display side of the display panel to protect the display panel, and a known protective plate can be used. As a material of a protective plate, a glass plate or a transparent resin board is mentioned. In particular, it has high transparency to the emitted light or reflected light from the display panel. A glass plate is preferred in terms of high light resistance, low birefringence, high planar precision, good surface damage resistance, and high mechanical strength. The material of the glass plate may be a glass material such as soda lime glass, and it is more preferable that the iron content is lower and the blue color is higher than that of the glass (white glass). For added safety, tempered glass can also be used. Particularly in the case of using a thin glass plate, it is preferred to use a glass plate which is chemically strengthened. The material of the transparent resin sheet is a resin material (polycarbonate, polymethyl methacrylate or the like) having high transparency.

The shape and size of the protective plate are not particularly limited, and are determined depending on the shape and size of the display panel. The shape of the display panel and the protection panel is generally rectangular. The protective plate is preferably a slightly larger rectangle than the display panel.

In the present invention, for example, a rectangular protective sheet can be preferably used for bonding a protective sheet having a short side length of 30 mm or more. The larger the protective sheet, the greater the effect obtained by applying the present invention. If it is, for example, a rectangular protective sheet, it is preferable that the length of the short side is 80 mm or more.

The upper limit of the size of the protective plate is not particularly limited, and may vary depending on the use of the protective plate. In the case of a rectangular protective sheet for a general display member, for example, the length of the short side is preferably 2,500 mm or less, more preferably 1,500 mm or less.

In terms of mechanical strength and transparency, the thickness of the protective sheet is usually 0.5 to 25 mm in the case of a glass plate. For the use of a television receiver or a PC (Personal Computer) display for use in a house, it is preferably 1 to 6 mm in terms of weight reduction of the display device, and is installed in a public place outside the house. In the display use, it is preferably 3 to 20 mm. In the case of using chemically strengthened glass, the thickness of the glass is preferably about 0.5 to 1.5 mm in terms of strength. In the case of a transparent resin sheet, it is preferably 2 to 10 mm.

The resin layer of the transparent face material having a resin layer can be used for a known resin layer having adhesion or adhesion after curing.

For example, a resin layer having a shear modulus of 10 ³ to 10 ⁷ Pa, preferably 10 ⁴ to 10 ⁶ Pa at 25 ° C is preferred. As long as the shear modulus is 10 ³ Pa or more, the shape of the resin layer can be maintained. Further, even when the thickness of the resin layer is relatively thick, the thickness can be maintained uniform, and when the transparent surface material having the resin layer is bonded to the display panel, voids are less likely to occur at the interface between the display panel and the resin layer. When the shear modulus is 10 ⁷ Pa or less, good adhesion can be exhibited when it is bonded to the display panel.

The shear modulus at 25 ° C was measured using a rheometer (Anton Paar Co., Ltd., modular rheometer Physica MCR-301) to measure the gap between the spindle and the light-transmitting platen. The thickness of the resin layer is the same, and the uncured hardenable composition is placed in the gap, and the shear elastic modulus of the hardening process is measured while applying heat and light required for hardening the uncured curable composition. The measured value under specific hardening conditions is set as the shear modulus of the resin layer.

The thickness of the resin layer is preferably from 0.03 to 2 mm, more preferably from 0.1 to 0.8 mm. When the thickness of the resin layer is 0.03 mm or more, the resin layer can effectively cushion the impact caused by a force from the side of the protective plate, and the display panel can be protected. Further, even if a foreign matter having a thickness not exceeding the thickness of the resin layer is mixed between the display panel and the transparent surface material having the resin layer, the thickness of the resin layer does not largely change, and the effect on the light transmission performance is small. When the thickness of the resin layer is 2 mm or less, voids remain in the resin layer, and the thickness of the entire display device does not become excessively thick.

The resin layer of the transparent surface material having the resin layer preferably includes a layer portion extending along the surface of the protective sheet, and a weir portion contacting the periphery of the layer portion and surrounding the layer. The thickness of the beak is thicker than the thickness of the layer. By including the weir-like portion in the resin layer, it is possible to suppress the expansion of the peripheral portion of the layered portion to the outside, that is, the thinning of the peripheral portion, and to keep the thickness of the entire layered portion uniform.

Moreover, when the transparent surface material having the resin layer is bonded to the display panel by the method of returning to the atmosphere by laminating in a reduced pressure environment, even in the case of When a gap is formed in the peripheral portion of the resin layer at the interface between the display panel and the resin layer, the beak portion may be shielded from the gap, thereby making the void open to the outside without being opened. Therefore, when the display panel is bonded to the transparent surface material having the resin layer in a reduced pressure environment and returned to the atmosphere, the following effects can be obtained: the pressure in the gap (the state in which the pressure is reduced) The difference in pressure with the pressure applied to the resin layer (atmosphere) causes the volume of the void to decrease, and the void disappears.

The thickness of the beak portion is preferably 0.005 mm or more thicker than the thickness of the layer portion, and more preferably 0.01 mm or more. The thickness of the beak portion is preferably 0.05 mm or less thicker than the thickness A of the layer portion, and is more than 0.03 thick in terms of suppressing the generation of the void due to the step difference between the beak portion and the layer portion. Below mm.

The difference between the thickness of the layered portion and the thickness of the beak portion is a laser beam-transparent transparent surface material and a layered portion or a beak formed thereon, using a laser displacement meter (LK-G80, manufactured by Keyence Corporation). The total thickness is measured and found by the difference. Further, the thickness of the layered portion is set to be equal to the thickness of the peripheral portion of the layered portion of the beak portion.

Further, it is preferable that the thickness of the layer portion and the thickness of the weir portion are uniform throughout the entire transparent surface material.

In order to make the thickness of the beak portion thicker than the thickness of the layer portion, the shrinkage ratio at the time of hardening of the curable composition forming the beak portion and the shrinkage rate at the time of hardening of the curable composition forming the layer portion are Designed in a smaller way.

One of the methods for reducing the shrinkage ratio at the time of hardening of the curable composition forming the beak portion is to reduce the amount of the curable group. Therefore, (i) the content of the curable compound (monomer) having a small molecular weight may be reduced, or (ii) the content of the curable compound (oligomer) having a large molecular weight may be increased.

That is, the viscosity of the curable composition forming the beak portion may be made higher than the viscosity of the curable composition forming the layer portion.

<Other Embodiments>

Further, the present invention is not limited to the above embodiment, and can be appropriately modified within the scope of the invention.

For example, when the bonding surface of the second face material (B) is deformed as in the first and second embodiments, the second pressing surface (D) is used on the outer side of the second face material (B). (Intermediate plate), in the case where the rigidity of the second face material (B) is sufficiently high, the second pressurizing surface (D) (intermediate plate) may not be provided.

Further, in the case where the bonding surface of the second face material (B) is deformed via the second pressing surface (D) (intermediate plate) as in the first and second embodiments, the intermediate portion may be The rigidity of the plate is small (using a material having a small modulus of elasticity or a thin plate or the like), and the pressure applied to the peripheral portion of the bonding surface is greater than the pressure applied to the inner side of the peripheral portion.

The material and size of the first surface material and the second surface material in the present invention are not particularly limited, and may be preferably applied to, for example, a bonding of a display panel and a protective sheet (a transparent surface material having a resin layer). It is applied to the bonding of construction materials or laminated glass of automobiles, solar cell panels, and the like.

The present application is based on Japanese Patent Application No. 2012-020014, filed on Jan.

1‧‧‧Transparent surface material

2‧‧‧ resin layer

3‧‧‧ glass plate

4‧‧‧protection board

10‧‧‧Support components

11‧‧‧Under the abutment

11a‧‧‧ convex

12‧‧‧ Peripheral extrusion members

13‧‧‧Intermediate board

21‧‧‧Underground support

21a‧‧‧Spherical seat

23‧‧‧Flange

24‧‧‧Support

40‧‧‧Decompression chamber

41‧‧‧ Container

41a‧‧‧ openings

42‧‧‧ cover

42a‧‧‧ cover inner surface

43‧‧‧ Sealing members

44‧‧‧Rubber washers

(A)‧‧‧1st face material

(B) ‧‧‧2nd face material

(C) ‧‧‧1st pressing surface

P‧‧‧ center axis

X‧‧‧ layering direction

Claims (9)

A method for producing a laminate, which is characterized in that a first surface material and a second surface material provided with a resin layer on at least one of the surface materials of the surface material are bonded together to produce a laminate, and includes a step of bringing the first surface material and the surface of the second surface material facing the resin layer into contact with each other; and the first bonding step of the contact surface between the first surface material and the second surface material Pressure is applied to the central portion of the contact surface, and a second bonding step is performed after bonding the central portion of the contact surface to the first surface material and the second surface material. The peripheral portion is pressed by a pressure in a direction in which the distance between the first surface material and the second surface material is reduced, whereby the peripheral edge portion of the contact surface is bonded to each other. The method for producing a laminate according to claim 1, wherein the first and second bonding steps are performed by pressing the first surface material and the second surface material to be convexly curved with respect to the contact surface. The step of bonding the spherical first pressing surface. The method for producing a laminate according to claim 2, wherein the second bonding step is to form a periphery of the contact surface by bringing a second pressing surface connected to the peripheral portion pressing member closer to the first pressing surface direction The step of fitting. The method for producing a laminate according to any one of claims 1 to 3, wherein, in the first bonding step, a bonding surface of the first face material and a contact surface between the first face member and the second face member are Flat. The method for producing a laminate according to any one of claims 1 to 4, wherein, in the entire first and second bonding steps, an average value of a pressure applied to a peripheral portion of the contact surface is the entire contact surface The average value of the pressure to withstand. The method for manufacturing a laminate according to any one of claims 1 to 5, wherein When the measurement points of the pressure applied to the contact surface are arranged in a square lattice shape at intervals of 10 mm, the maximum value of the pressure applied to the entire first and second bonding steps is 245 Pa or more at any of the above measurement points. . A manufacturing apparatus for a laminated body, which is capable of bonding a first surface material and a second surface material in which a resin layer is provided on a surface of at least one of the surface materials to produce a laminated body, and includes a support portion. The first and second face materials are supported in a state in which the surface on which the resin layer is provided are opposed to each other; the opposing portion faces the support portion coaxially; and the drive unit causes the support portion a distance from the opposing portion; the support portion and the opposing portion include a first spherical pressing surface that is curved toward the other and is substantially spherical, and the other includes the 1 and a peripheral portion pressing member that is partially pressed around the peripheral portion of the second face material. The apparatus for manufacturing a laminated body according to claim 7, wherein the peripheral portion pressing member includes a second pressing surface which is bendable into a substantially spherical shape. The apparatus for manufacturing a laminated body according to claim 7 or 8, further comprising an inclination adjusting unit that maintains a central axis of the first pressing surface and a central axis of the contact surface coaxially.