JP2014036925A - Agitator and manufacturing method of small size plate member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive in which spacers are mixed more uniformly.SOLUTION: An agitator 400 is used for agitating an adhesive 10 in which spacers 20 are mixed. The agitator 400 comprises: a storage tank 150 which stores the adhesive 10 in which the spacers 20 are mixed; agitating means including a shaft part 161 and an agitating blade 162 connected with the shaft part 161. In the agitating means, the agitating blade 162 may be disposed in the storage tank 150 and may rotate in the storage tank 150 with the shaft part 161 set as a rotation axis. A transport structure for transporting the adhesive 10, in which the spacers 20 are dispersed in the storage tank 150 according to rotations of the agitating blade 162, is integrally provided with the shaft part 161. The transport structure rotates in response to rotations of the shaft part 161 which causes the rotations of the agitating blade 162 and causes the adhesive 10, in which the spacers 20 are dispersed, to be transported from the storage tank 150 to the exterior of the storage tank 150.

Description

  The present invention relates to a stirring device and a method for manufacturing a small-sized flat plate member.

  In recent years, the spread of small electronic devices typified by smartphones has been remarkable, and there is a strong demand for producing mother glass used for them with high efficiency. The mother glass is obtained by cutting a large plate glass according to customer specifications.

  In Patent Document 1, a material glass block A is formed by laminating a material glass 1 through a fixing agent 2 as shown in FIGS. 1 to 3 of the document, and then, as shown in FIG. Is divided by a disk cutter 11 to form a divided glass block B having a small area, then the outer periphery of the small glass block B is processed to form a glass block C, and then the end face processing of the glass block C is performed. Next, it is disclosed that the glass blocks C are individually separated. The fixing agent 2a is a photocurable liquid fixing agent as described in paragraph 0010 of the same document, is cured by UV irradiation, and is softened by raising the temperature to 80 to 90 degrees with warm water.

  Patent Documents 2 to 5 disclose technologies related to a stirring device. As can be seen from the references in FIGS. 1 to 4 of the same document, in Patent Document 2, a spiral sample 2 is provided on the sampling nozzle 2 as a stirring member to the liquid sample in the sample container 4 in the automatic analyzer 1, and the sample It has been disclosed to improve the uniformity of the material within.

  In Patent Document 3, as can be seen from the reference in FIG. 1 of the same document, the stirring blade 9 of the suction nozzle 2 is provided, and convection is conducted to the liquid sample 8 in the sample container 7 when the suction nozzle 2 moves up and down during sampling. It is disclosed that the liquid sample 8 is effectively agitated.

  As can be seen from FIGS. 1 to 6 of the document, Patent Document 4 discloses disposing a turbine-type stirrer 3 in the storage tank 1 to cause a liquid to flow as indicated by the arrows.

  As can be seen from FIGS. 1 and 2 of Patent Document 5, the suction tube 30 supported by the housing 14 has a flow path extending from the lower end of the stirring tube 12 to the upper end thereof. A spiral screw immersed in a liquid contained in a container such as a drum is provided below the stirring tube 12. It is described that the connector 35 shown in FIG. 1 is connected to a suitable suction pump during operation of the device 10. It is described that the liquid flow is closed by the suction pipe 30, the passage 32, the pipe elbow 34, and the connector 35.

JP 2009-256125 A JP 2002-162402 A JP 2004-101271 A JP-A-5-170801 JP-A-7-246324

  It is expected that the amount of the adhesive used can be reduced by dispersing the spacer in the adhesive used for temporarily fixing the glass sheet, or that the stacking interval of the laminated glass sheets can be suitably controlled. However, if the number of spacers included in the predetermined amount of adhesive varies, the amount of adhesive used may not be sufficiently reduced. Also, if there is variation in the number of spacers contained in a predetermined amount of adhesive, it is not possible to suitably control the stacking interval of the sheet glass laminated via the adhesive layer containing the spacers. When the outer shape processing or the end surface processing is performed, a processing error occurs between individual plate glasses, and the reliability of the shape of the glass product may be reduced.

  The present inventor has found a new problem of providing an adhesive in which spacers are more uniformly dispersed.

  The stirrer according to the present invention is a stirrer for stirring an adhesive mixed with a spacer, and is connected to a storage tank to store the adhesive mixed with the spacer, a shaft portion, and the shaft portion. Stirring means comprising a stirring blade, wherein the stirring blade can be disposed in the storage tank, and can be rotated in the storage tank with the shaft portion as a rotation axis. A conveying structure for conveying the adhesive in which the spacer is dispersed in the storage tank according to the rotation of the stirring blade is provided integrally with the shaft portion, and the conveying structure is provided with the stirring blade. It rotates according to the rotation of the shaft portion that causes the rotation of the adhesive, and transport of the adhesive in which the spacer is dispersed from the inside of the storage tank to the outside of the storage tank is caused. According to this apparatus, an adhesive in which spacers are more uniformly dispersed can be suitably provided.

  The said conveyance structure is good to include the spiral guide extended helically along the rotating shaft of the said axial part.

  The conveyance structure may further include a cylindrical portion in which the spiral guide is provided.

  The conveyance structure may further include a rod portion extending along the rotation axis of the shaft portion, and the spiral guide may be provided on an outer peripheral surface of the rod portion.

  The adhesive inlet provided in the cylindrical portion may be provided at a position facing the bottom surface of the storage tank.

  The stirring blade includes at least one horizontal bar portion extending from the shaft portion toward the inner peripheral surface side of the storage tank, and at least one vertical bar portion extending from the horizontal bar portion in the depth direction of the storage tank. And good.

  The manufacturing method of the small-sized flat plate member which concerns on this invention was obtained by the process of bonding flat plate members through the spacer containing adhesive stirred with the stirring apparatus in any one of the above-mentioned, and the said bonding process A step of cutting the laminate of the flat plate members, and removing the adhesive of the small size laminate obtained by the cutting step to individually separate the small size flat plate members constituting the small size laminate And a step of performing.

  The step of processing the outer shape of the small-sized laminate, the step of chamfering the end of each flat plate member constituting the small-size laminate, or the small-size laminate as an etching solution It is good to further include a dipping step.

  The flat plate member may be a transparent substrate, and the adhesive may be curable in response to incident light through the transparent substrate.

  According to the present invention, it is possible to provide an adhesive in which spacers are mixed more uniformly.

It is a schematic perspective view of the large sized plate glass laminated body which concerns on 1st Embodiment of this invention. It is a top view of the large sized plate glass laminated body which concerns on 1st Embodiment of this invention, and shows the dividing line virtually drawn | drawn vertically and horizontally. It is a schematic diagram which shows that a small sized plate glass laminated body is obtained by the division | segmentation of the large sized plate glass laminated body which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows that a small sized plate glass laminated body isolate | separates into each small sized plate glass by the temperature rising process of the small sized plate glass laminated body which concerns on 1st Embodiment of this invention. It is a schematic process drawing which shows the external shape process of the small sized plate glass laminated body which concerns on 1st Embodiment of this invention. It is a schematic process drawing which shows the end surface process of the small sized plate glass laminated body which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the stirring apparatus which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the stirring apparatus which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the structure of the axial part of the stirring apparatus which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the structure of the axial part of the stirring apparatus which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the stirring apparatus which concerns on a reference example. It is a schematic block diagram of the stirring apparatus which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the stirring apparatus which concerns on 3rd Embodiment of this invention. It is a schematic diagram which shows the structure around the axial part of the stirring apparatus which concerns on 4th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments are not individually independent, and need not be overexplained. Those skilled in the art can appropriately combine the embodiments, and can also grasp the synergistic effect of the combination. In principle, duplicate descriptions between the embodiments are omitted.

<First Embodiment>
The first embodiment will be described with reference to FIGS. FIG. 1 is a schematic perspective view of a large glass sheet laminate. FIG. 2 is a top view of a large-sized sheet glass laminate, showing dividing lines virtually drawn vertically and horizontally. FIG. 3 is a schematic view showing that a small-sized plate glass laminate is obtained by dividing a large-size plate glass laminate. FIG. 4 is a schematic diagram showing that the small-size plate glass laminate is separated into individual small-size plate glasses by the temperature increasing process of the small-size plate glass laminate. FIG. 5 is a schematic process diagram showing the outer shape processing of a small-sized sheet glass laminate. FIG. 6 is a schematic process diagram showing an end face treatment of a small-sized sheet glass laminate. 7 and 8 are schematic configuration diagrams of the stirring device. 9 and 10 are schematic views showing the configuration of the shaft portion of the stirring device. FIG. 11 is a schematic configuration diagram of a stirring device according to a reference example.

  First, referring to FIG. 1 to FIG. 6, a large-size plate glass 200 (hereinafter simply referred to as “plate glass 200”) to a small-size plate glass 201 (hereinafter sometimes simply referred to as “plate glass 201”) is efficient. Will be described. In addition, about XYZ coordinate shown in FIG. 1 etc., plate glass exists in the predetermined plane parallel to an X-axis and a Y-axis, and a Z-axis corresponds with the lamination direction of plate glass / the thickness direction of plate glass.

The plate glass 200 is an example of a flat plate member, and may be a sapphire substrate, a quartz substrate, a plastic substrate, a magnesium fluoride substrate, or the like. The plate glass 200 may be a tempered plate glass, a material plate glass, a glass substrate with a transparent conductive film, a glass substrate on which electrodes and circuits are formed, or the like. Although there is no restriction | limiting in particular in the magnitude | size of the plate glass 200, it has an area of about 10,000-250,000 mm < ² > typically, and has a thickness of about 0.1-2 mm. The laminated glass sheets 200 are preferably the same size. A predetermined printing pattern or plating pattern may be printed on the surface of the plate glass 200. Examples of the print pattern include a mobile phone display screen design, and examples of the plating pattern include a metal wiring pattern such as Al or AlNd, and a rotary encoder provided with a chromium plating pattern.

  As shown in FIG. 1, a large glass plate 200 is bonded one by one through an adhesive layer 100 made of a spacer-mixed adhesive in which a spacer 20 is mixed in a photocurable adhesive (adhesive) 10. Then, the photocurable adhesive 10 is cured by irradiation with ultraviolet rays (energy rays), and thereby the large-size plate glass laminate 250 (hereinafter simply referred to as a plate glass laminate 250). May be formed). The plate glass laminate 250 is a laminate of five large-size plate glasses 200 constituting the first layer L1 to the fifth layer L5, and the respective plate glasses 200 are laminated via the adhesive layer 100 described above. In FIG. 1, the spacers 20 are arranged between the glass plates 200 so as to form a single layer, but are merely exemplary, and the spacers 20 are arranged or disordered so as to form a multilayer between the glass plates 200. It may be dispersed. The wavelength of light that accelerates the curing of the photocurable adhesive 10 is arbitrary, and should not be limited to ultraviolet rays.

  If the thickness of the plate glass laminate 250 in the Z-axis direction is too thin, the mechanical strength becomes weak. Therefore, although it depends on the thickness of each plate glass 200, it is preferably 5 sheets or more, more preferably about 10 to 30 sheets. It is desirable to laminate the plate glass 200. In addition, about the specific material of the photocurable adhesive agent 10 and the spacer 20, it is arbitrary. The specific gravity of the photocurable adhesive 10 is 1.06 to 1.115. The specific gravity of the spacer 20 is 1.0 to 1.1.

The ultraviolet irradiation may be performed every time one plate glass 200 is laminated, or may be carried out collectively after a plurality of sheets are laminated as long as light reaches the photocurable adhesive 10. At this time, if the irradiation ultraviolet ray intensity is too strong, the peelability and appearance of the plate glass laminate 250 are likely to deteriorate with time, whereas if the irradiation ultraviolet ray intensity is too weak, the photocurable adhesive 10 is insufficiently cured. when curing the photocurable adhesive 10 for each bonding the glass sheet 200 is preferably in a 1000~10000mJ / cm ² irradiation amount of ultraviolet rays, more preferably, to 1200~6000mJ / cm ^2, It is still more preferable to set it as 1500-3000mJ / cm < ² >. The irradiation time is preferably 10 to 200 seconds, more preferably 20 to 100 seconds.

  As shown in FIG. 2, on the upper surface 251 of the glass sheet laminate 250, a dividing line DL11 that runs vertically (Y-axis direction) and a dividing line DL21 that runs horizontally (X-axis direction) when viewed from the front in FIG. And a small glass sheet laminate 260 (hereinafter sometimes simply referred to as a sheet glass laminate 260) schematically shown in FIG. 3 by dividing the glass sheet laminate 250 along the dividing lines DL11 and DL21. It is formed. In addition, although the specific method of dividing | segmenting the large sized plate glass laminated body 250 is arbitrary, in order to maintain high production efficiency, it utilizes the rotary blade called a dicing blade, and the plate glass laminated body 250 is the lamination direction ( It is desirable to cut in the Z-axis direction). Fixed abrasive type or loose abrasive type wire saw, laser beam, etching (eg chemical etching or electrolytic etching using hydrofluoric acid or sulfuric acid, etc.), water jet, red tropical (Nichrome wire), etc. are used alone or in combination It doesn't matter. The interval W10 between the dividing lines DL21 and the interval W20 between the dividing lines DL11 are appropriately set according to customer specifications.

  As shown in FIG. 4, the small-sized sheet glass laminate 260 obtained by the division is put into a melting treatment tank 300 in which hot water of about 80 ° C. to 90 ° C. is stored. The layer of the photocurable adhesive 10 cured by the above-described ultraviolet irradiation is heated in hot water of about 80 ° C. to 90 ° C., and peeled off from the interface with the plate glass 201 to thereby form a photocurable adhesive. The agent 10 is efficiently removed, and the plate glasses 201 constituting the small-size plate glass laminate 260 are individually separated, and a large number of small-size plate glasses 201 are efficiently obtained. In FIG. 4, for convenience of illustration, the melting processing tank 300 is shown small.

  Before the melting treatment of the photocurable adhesive 10 shown in FIG. 4, it may be desirable to process the outer shape of the plate glass laminate 260 as schematically shown in FIG. 5. The outer shape of 201 can be processed collectively. In this case, as described at the beginning, if there is variation in the stacking interval between the glass sheets 201, the processing accuracy of the outer shape of each glass sheet 201 may be deteriorated. In addition, the specific method of the external shape processing of the plate glass laminated body 260 is arbitrary, For example, it is good to employ | adopt dicing with a rotary blade, grinding with a rotating grindstone, drilling with an ultrasonic vibration drill, processing with a rotating brush, etc.

  Before the melting treatment of the photocurable adhesive 10 shown in FIG. 4, it is desirable to chamfer the end portion 201k of the plate glass 201 constituting the plate glass laminate 260 as schematically shown in FIG. Chamfering of the end portion 201k of the plate glass 201 can be performed collectively before separation. Further, by chamfering the end portion 201k of the plate glass 201 after the outer shape processing of the plate glass laminate 260 described with reference to FIG. 5, the chipping, cracking, chipping, or the like of the plate glass 201 after the outer diameter processing is removed. Can also be expected. When processing the end portion of the end portion 201k of the plate glass 201, as described at the beginning, when there is variation in the stacking interval between the plate glasses 201, the chamfering accuracy of the end portions 201k of the individual plate glasses 201 may be deteriorated. is there. Although the specific method of chamfering the end 201k of the plate glass 201 is arbitrary, it is desirable to use a cutting jig 310 as shown in FIG. 6A, and as can be seen from FIG. 6B. The end portions 201k of the laminated glass sheets 201 can be chamfered together.

  As shown in FIG. 6, the cutting jig 310 is fixed to a spindle (not shown) or the like and can be rotated around a rotation axis AX3. The cutting jig 310 has a cutting crest 310k provided continuously along the rotation axis AX3, and the cutting crest 310k is continuous in the circumferential direction around the rotation axis AX3. The cutting crest 310k has a pair of cutting inclined surfaces 310m and 310n, and each cutting inclined surface 310m and 310n is a flat surface continuous in the circumferential direction around the rotation axis AX3. The top part 310r of the cutting peak part 310k also continues linearly in the circumferential direction around the rotation axis AX3. The cutting jig 310 is positioned with respect to the sheet glass laminate 260 in such a manner that the top part 310r enters between the laminated sheet glasses 201, and is rotated around the rotation axis AX3 in this state, whereby the sheet glass is formed. The end 201k of 201 is chamfered.

  By moving the cutting jig 310 in the X-axis direction with respect to the plate glass laminate 260, the degree of chamfering applied to the end portion 201k of the plate glass 201 can be adjusted. By moving the cutting jig 310 in the Y-axis direction with respect to the plate glass laminate 260, it is possible to continuously chamfer along the end portion 201k of the plate glass 201. Instead of moving the cutting jig 310 in the XY plane, the plate glass laminate 260 may be moved in the XY plane.

  Hereinafter, the configuration of the stirring device capable of supplying the photocurable adhesive 10 in which the spacers 20 are more uniformly dispersed will be described in detail with reference to FIGS. 7 to 10. In addition, it can be expected that the amount of use of the photocurable adhesive 10 is sufficiently reduced by the more uniform dispersion of the spacers 20. Further, the more uniform dispersion of the spacers 20 can reduce the variation in the stacking interval between the glass plates 201 described above, which is particularly advantageous when processing the outer shape or the end portion of the glass plate 201. In addition, the use of the photocurable adhesive 10 in which the spacer 20 is mixed is not limited to temporary fixing of a plate-like member or the like, and can be applied to semi-permanent bonding.

  As shown in FIG. 7, the stirring system 500 includes a stirring device 400 including a storage tank 150, a shaft portion 161, and a stirring blade 162, and a stirring means / stirring mechanism is configured by the shaft portion 161 and the stirring blade 162. . The stirring system 500 includes a driving device 173 for driving the shaft portion 161 of the stirring device 400. The shaft portion 161 is rotated in accordance with the rotational force transmitted from the driving device 173, and at the same time, the stirring blade 162 connected to the lower end of the shaft portion 161 is rotated. The adhesive 10 and the spacer 20 are agitated and mixed. As will be apparent from the description below, the shaft portion 161 functions as a rotating shaft of the stirring blade 162 and autonomously moves the photocurable adhesive 10 in which the spacer 20 is dispersed from the storage tank 150 to the storage tank 150. / Also functions as a conveying means for automatically conveying. The agitation system 500 further includes a discharge device 175 that discharges the photocurable adhesive 10 in which the spacer 20 supplied from the storage tank 150 through the shaft portion 161 is dispersed, and the operation of the discharge device 175 refers to FIG. As described above, a predetermined amount of spacer-mixed adhesive is applied on the surface of the plate glass 200.

  The drive shaft 173m of the drive device 173 is coupled to the shaft portion 161 of the stirring device 400 via the coupling portion 173n. The discharge device 175 and the shaft portion 161 are connected to each other through a flow path 179 provided with an on-off valve 177 so that the fluid can move. The inner diameter of the flow path 179 is appropriately set according to the flow rate and viscosity of the flowing fluid. In order to stabilize the liquid viscosity at the time of stirring, the storage tank 150 may be provided with a temperature adjustment mechanism (not shown). The temperature adjusting mechanism is not particularly limited, and any mechanism may be used as long as the entire tank such as a heater, a water passage jacket, and a chiller unit can be maintained at a constant temperature.

  The storage tank 150 is a bottomed cylindrical body made of metal, for example, and can store a predetermined amount of the photocurable adhesive 10. Inside the storage tank 150, a shaft portion 161 connected to the stirring blade 162 which is the above-described stirring means / stirring mechanism is disposed. The stirring blade 162 is immersed in the photocurable adhesive 10 in the storage tank 150 and is disposed deeper than the liquid level. The stirring blade 162 is not particularly limited as long as the inside of the tank can be made uniform without entraining bubbles in the liquid. An appropriate stirring blade 162 is selected in consideration of the characteristics of the photocurable adhesive 10 having a large capacity and a certain degree of viscosity.

  Illustratively, an anchor blade that can uniformly agitate the photocurable adhesive 10 in a relatively large capacity storage tank 150 is selected as the stirring blade. In short, the stirring blade 162 includes horizontal bar portions 162m and 162n and vertical bar portions 162p and 162q which are symmetrical with respect to the shaft portion 161. The horizontal bar portions 162m and 162n linearly extend to the inner peripheral surface side of the storage tank 150 toward the side away from the shaft portion 161, in other words, linearly outward in the radial direction in relation to the cylindrical storage tank 150. Extend. The lengths of the horizontal bar portions 162m and 162n are set so as not to interfere with the inner peripheral surface of the storage tank 150 in consideration of the inner diameter of the storage tank 150. The vertical bar portions 162p and 162q are linearly extended from the outer end portions of the horizontal bar portions 162m and 162n along the shaft portion 161 in the depth direction of the storage tank 150, and finally upward from the bottom of the storage tank 150. Extend. It is desirable to set the length of the vertical bar portions 162p and 162q within the depth range of the storage tank 150.

  The number of rotations of the stirring blade 162 per unit time is arbitrary, but an appropriate speed is selected so that bubbles are not generated in the liquid and uniform diffusion of the spacer can be achieved. The stirring blade 162 may be a helical ribbon blade, a pitched paddle blade, a ribbon blade, a pitched (flat) turbine blade, a full zone blade, or the like.

  When air bubbles are mixed in the adhesive layer 100 in the plate glass laminate 260 shown in FIG. 3, when the plate glass laminate 260 is immersed in an etching solution or the like, the etching solution unintentionally enters the bubbles, and the surface of the plate glass 201 Or, there is a risk of damaging an arbitrary layer on the surface, which may lead to a poor appearance inspection of the mother glass.

  The shaft portion 161 can autonomously / automatically convey the photocurable adhesive 10 in which the spacer 20 is dispersed from the introduction port 161k to the discharge port 161r as schematically shown in FIG. 8 according to its rotation. It is configured. In this way, by using the shaft portion 161 as an autonomous / automatic conveyance path, the photocurable adhesive 10 in which the spacers 20 are uniformly dispersed to a desired degree can be suitably taken out. By appropriately preventing the bubbles from being generated in the photocurable adhesive 10 by appropriately using the stirring blade 162, it is possible to suppress the bubbles from being mixed into the photocurable adhesive 10 taken out from the storage tank 150.

  9 and 10 show an exemplary configuration of the shaft portion 161. FIG. As shown in FIGS. 9 and 10, the shaft portion 161 includes a spiral guide 163 that spirally extends along the rotation axis AX5, and the spiral guide 163 extends spirally along the rotation axis AX5. A thickness of the spiral guide 163 defined by the set of guide surfaces is set to an appropriate thickness. Between the spiral guides 163, a spiral channel 166 extending in a spiral shape along the rotation axis AX5 is provided. The photocurable adhesive 10 in which the spacers 20 are dispersed flows on the spiral guide surface of the spiral guide 163 according to the rotation of the spiral guide 163, that is, flows in the spiral flow path 166.

  A cylindrical portion 164 that is integral with the spiral guide 163 is provided around the spiral guide 163, whereby the spiral flow path 166 is closed from the outside, and the photocurable adhesive 10 in which the spacer 20 is dispersed is efficiently used. Can be transported. The cylindrical portion 164 is a cylindrical body that extends linearly along the rotation axis AX5. The cylindrical portion 164 includes an inner peripheral surface 164a and an outer peripheral surface 164b. The cylindrical portion 164 is a predetermined portion defined by the interval between the inner peripheral surface 164a and the outer peripheral surface 164b. It has a thickness. The cylindrical portion 164 rotates together with the spiral guide 163.

  The spiral guide 163 preferably has a shaft configuration. In this example, as shown in FIG. 9, the spiral guide 163 is integrally formed on the outer peripheral surface of the rod portion 165 extending linearly along the rotation axis AX5. Provided, the rod portion 165 and the spiral guide 163 rotate together. The rod portion 165, the spiral guide 163, and the tube portion 164 rotate together around the rotation axis AX 5, and the photocurable adhesive 10 in which the spacers 20 are dispersed flows in the spiral flow channel 166 according to the rotation. .

  The spiral channel 166 is a channel defined by the spiral guide 163 and closed by the cylindrical portion 164, and communicates between the inlet 161k and the outlet 161r shown in FIG. As shown in FIG. 10, it is desirable that the outer peripheral end portion 163k of the spiral guide 163 is connected to the inner peripheral surface 164a of the cylindrical portion 164. However, the rotation of the spiral guide 163 causes fluid to enter the cylindrical portion 164. Because of the flow, it does not necessarily have to be so configured.

  Returning to FIG. 7, the operation method of the stirring system 500 / the operation mode of the stirring device 400, etc. will be described. First, a predetermined amount of the photocurable adhesive 10 and a predetermined amount of the spacer 20 are put into the storage tank 150. Thereafter, the drive device 173 is operated to rotate the drive shaft 173m, and the shaft portion 161 of the stirring device 400 connected to the drive shaft 173m via the coupling portion 173n is rotated. The stirring blade 162 connected to the lower end of the shaft portion 161 is rotated in the storage tank 150 according to the rotation of the shaft portion 161, and this operation is continued for a predetermined time, whereby the photocurable adhesive is stored in the storage tank 150. The spacers 20 are uniformly dispersed in 10.

  When the on-off valve 177 is opened after a predetermined time has elapsed, the shaft portion 161 starts functioning not only as a rotating shaft but also as a transport path. In short, the photocurable adhesive 10 in which the spacers 20 are dispersed according to the rotation of the shaft portion 161 (that is, the spiral guide 163, the cylindrical portion 164, and the rod portion 165) is transferred from the storage tank 150 to the spiral flow path 166. It flows in and is conveyed from the introduction port 161k of the shaft portion 161 / cylinder portion 164 to the discharge port 161r side via the spiral flow path 166. The photocurable adhesive 10 in which the spacers 20 are dispersed reaches the discharge port 161r of the shaft portion 161, and then is supplied to the discharge device 175 via the flow path 179. The discharge device 175 starts operating at an appropriate time, and discharges the photocurable adhesive 10 in which the spacer 20 supplied from the storage tank 150 is dispersed onto the plate glass 200 shown in FIG.

  In addition, the discharge amount of the photocurable adhesive 10 in which the spacers 20 are dispersed can be adjusted by adjusting the rotation speed of the stirring blade 162. The rotation speed of the stirring blade 162 may be decreased in accordance with a decrease in the liquid level in the storage tank 150. The discharge amount may be controlled by returning a part or all of the photocurable adhesive 10 in which the spacer 20 is dispersed to the storage tank 150.

  As is clear from the above description, in this embodiment, a transport structure (here, at least a spiral) transports the photocurable adhesive 10 in which the spacers 20 are dispersed in the storage tank 150 in accordance with the rotation of the stirring blade 162. A guide 163) is integrally provided with respect to the shaft portion 161, and the conveying structure (here, at least the spiral guide 163) rotates in response to the rotation of the shaft portion 161 that causes the stirring blade 162 to rotate, The adhesive 10 in which the spacers 20 are dispersed is transported from the inside of the storage tank 150 to the outside of the storage tank 150. The spiral guide 163 rotates in accordance with the rotation of the shaft portion 161, and the photocurable adhesive 10 in which the spacer 20 is dispersed flows in the spiral flow path 166 defined by the spiral guide 163, whereby the spacer 20 Can be suitably collected from the storage tank 150.

  If a transfer tube or pipe is separately added to the storage tank 150, there is a possibility of adversely affecting uniform stirring in the storage tank 150 by the stirring blade 162. According to the present embodiment, it is possible to effectively utilize the shaft portion arranged in the storage tank 150 to secure the conveyance path of the photocurable adhesive 10 and to effectively avoid the occurrence of such a problem. .

  It can be expected that the use amount of the photocurable adhesive 10 is reduced by the uniform dispersion of the spacers 20. Furthermore, the uniform dispersion of the spacers 20 can be expected to favorably control the stacking interval of the sheet glasses laminated via the photocurable adhesive 10 in which the spacers 20 are dispersed. This is particularly advantageous when the outer shape processing or end surface processing is performed collectively. Further, if the rotation speed of the shaft portion 161 is adjusted to prevent air bubbles from being mixed into the photocurable adhesive 10, the bubbles are also generated in the photocurable adhesive 10 supplied from the storage tank 150 to the outside. It can be expected not to be mixed, and it is particularly advantageous when a plate glass laminate in which plate glasses are laminated via the photocurable adhesive 10 is immersed in an etching solution.

  Although the specific configuration of the transport structure provided integrally with the shaft portion 161 is arbitrary, preferably, the transport structure is spiral guide 163 extending spirally along at least the rotation axis AX5 of the shaft portion 161. including. This point can be properly understood in consideration of the disclosure of the fourth embodiment described later. More preferably, like this embodiment, the conveyance structure further includes a cylindrical portion 164 in which a spiral guide 163 is provided.

  The case of the reference example will be described with reference to FIG. As shown in FIG. 11, a discharge pipe 155 may be connected to the side wall near the bottom of the storage tank 150 to discharge the photocurable adhesive 10 containing the spacer 20 in the storage tank 150. However, in this case, there is a range where stirring cannot be sufficiently performed in the range DS indicated by the dotted line, and the uniform stirring of the spacer 20 in the photocurable adhesive 10 may be deteriorated. In the above-described embodiment, the space is not provided in the storage tank 150 to take out the photocurable adhesive 10 containing the spacer 20, but is provided in the shaft portion 161, so that it is possible to avoid a situation where stirring cannot be performed sufficiently. . Note that the shaft portion 161 ′ shown in FIG. 11 is not a hollow but a solid rod-like portion.

-Examples of adhesive and spacer materials-
Hereinafter, suitable materials for the above-described photocurable adhesive and spacer will be described.

  Any known photocurable adhesive can be used and is not particularly limited. For example, (A) polyfunctional (meth) acrylate and (B) monofunctional (meth) acrylate as described in WO2008 / 018252. And (C) an adhesive composition containing a photopolymerization initiator is preferred.

  (A) As a polyfunctional (meth) acrylate, two or more (meth) acryloylated polyfunctional (meth) acrylate oligomer / polymer or two or more (meth) acryloyl groups at the oligomer / polymer terminal or side chain Polyfunctional (meth) acrylate monomers having can be used. For example, as a polyfunctional (meth) acrylate oligomer / polymer, 1,2-polybutadiene-terminated urethane (meth) acrylate (for example, “TE-2000”, “TEA-1000” manufactured by Nippon Soda Co., Ltd.), hydrogenated product ( For example, “TEAI-1000” manufactured by Nippon Soda Co., Ltd.), 1,4-polybutadiene-terminated urethane (meth) acrylate (for example, “BAC-45” manufactured by Osaka Organic Chemical Co., Ltd.), polyisoprene-terminated (meth) acrylate, polyester-based urethane (Meth) acrylate (for example, “UV-2000B”, “UV-3000B”, “UV-7000B” manufactured by Nippon Synthetic Chemical Co., Ltd., “KHP-11”, “KHP-17” manufactured by Negami Kogyo Co., Ltd.), polyether type Urethane (meth) acrylate (for example, “UV-3700B”, “UV” manufactured by Nippon Synthetic Chemical Co., Ltd. 6100B "), or bisphenol A type epoxy (meth) acrylate.

  Here, the urethane (meth) acrylate is a reaction between a polyol compound (hereinafter represented by X), an organic polyisocyanate compound (hereinafter represented by Y), and a hydroxy (meth) acrylate (hereinafter represented by Z). The urethane (meth) acrylate obtained by this.

  Examples of the polyol compound (X) include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, butylene glycol, 1,4-butanediol, polybutylene glycol, 1, 5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 3-methyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 2,2-butylethyl-1,3-propanediol, neopentyl glycol, cyclohexanedimethanol, hydrogenated bisphenol A, polycaprolactone, trimethylolethane, trimethylolpropane, poly At least polyhydric alcohols such as limethylolpropane, pentaerythritol, polypentaerythritol, sorbitol, mannitol, glycerin, polyglycerin, polytetramethylene glycol, polyethylene oxide, polypropylene oxide, ethylene oxide / propylene oxide block or random copolymerization Polyether polyol having one type of structure, a polycondensate of the polyhydric alcohol or polyether polyol and a polybasic acid such as maleic anhydride, maleic acid, fumaric acid, itaconic anhydride, itaconic acid, adipic acid, and isophthalic acid Polyester polyols, caprolactone-modified polytetramethylene polyols and other caprolactone-modified polyols, polyolefin-based polyols, polycarbonate-based poly Lumpur, polybutadiene polyols, polyisoprene polyols, hydrogenated polybutadiene polyols, polydiene polyols such as hydrogenated polyisoprene polyol, silicone polyol, such as polydimethylsiloxane polyols and the like. Among these, polyether polyol and / or polyester polyol are more preferable, and polyester polyol is most preferable.

  The organic polyisocyanate compound (Y) is not particularly limited. For example, aromatic, aliphatic, cycloaliphatic, and alicyclic polyisocyanates can be used. Isocyanate (TDI), diphenylmethane diisocyanate (MDI), hydrogenated diphenylmethane diisocyanate (H-MDI), polyphenylmethane polyisocyanate (crude MDI), modified diphenylmethane diisocyanate (modified MDI), hydrogenated xylylene diisocyanate (H-XDI) ), Xylylene diisocyanate (XDI), hexamethylene diisocyanate (HMDI), trimethylhexamethylene diisocyanate (TMXDI), tetramethylxylylene diisocyanate (m-TMXDI), isophorone diisocyanate Polyisocyanates such as nate (IPDI), norbornene diisocyanate (NBDI), 1,3-bis (isocyanatomethyl) cyclohexane (H6XDI), trimer compounds of these polyisocyanates, reaction products of these polyisocyanates and polyols, etc. Preferably used. In these, hydrogenated xylylene diisocyanate (H-XDI) and / or isophorone diisocyanate (IPDI) are preferable.

  Examples of the hydroxy (meth) acrylate (Z) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2-hydroxyethyl acryloyl phosphate, and 4-butyl. Hydroxy (meth) acrylate, 2- (meth) acryloyloxyethyl-2-hydroxypropyl phthalate, glycerin di (meth) acrylate, 2-hydroxy-3-acryloyloxypropyl (meth) acrylate, caprolactone modified 2-hydroxyethyl (Meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, caprolactone-modified 2-hydroxyethyl (meth) acrylate, etc. . In these, 1 or more types in the group which consists of 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate is preferable.

  Among these, polyester-based urethane (meth) acrylate and / or polyether-based urethane (meth) acrylate are preferable, and polyester-based urethane (meth) acrylate is more preferable because of its great effect.

The weight average molecular weight of the polyfunctional (meth) acrylate oligomer / polymer is preferably from 7000 to 60000, and more preferably from 13000 to 40000. The weight average molecular weight can be obtained by using a GPC system (SC-8010, manufactured by Tosoh Corp.) using tetrahydrofuran as a solvent under the following conditions and preparing a calibration curve with commercially available standard polystyrene.
Flow rate: 1.0 ml / min
Set temperature: 40 ° C
Column configuration: “TSK guardcolumn MP (× L)” manufactured by Tosoh Corporation 6.0 mmID × 4.0 cm1 and “TSK-GEL MULTIPIOREHXL-M” 7.8 mmID × 30.0 cm (16,000 theoretical plates) 2), 3 in total (32,000 theoretical plates as a whole)
Sample injection volume: 100 μl (sample solution concentration 1 mg / ml)
Liquid feeding pressure: 39 kg / cm ²
Detector: RI detector

  Examples of the bifunctional (meth) acrylate monomer include 1,3-butylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and 1,9- Nonanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, 2-ethyl-2-butyl-propanediol di (meth) acrylate, neopentyl glycol modified trimethylolpropane Di (meth) acrylate, stearic acid-modified pentaerythritol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 2,2-bis (4- (meth) acryloxydiethoxyphenyl) propane, 2,2-bis (4- (meth) acrylo Shi propoxyphenyl) propane or 2,2-bis (4- (meth) acryloxy-tetra-ethoxyphenyl) propane. Among these, 1,6-hexadiol di (meth) acrylate and / or dicyclopentanyl di (meth) acrylate is preferable and dicyclopentanyl di (meth) acrylate is more preferable because of its great effect.

  Examples of the trifunctional (meth) acrylate monomer include trimethylolpropane tri (meth) acrylate and tris [(meth) acryloxyethyl] isocyanurate.

  Examples of the tetrafunctional or higher (meth) acrylate monomer include dimethylolpropane tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol ethoxytetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, or dipenta Examples include erythritol hexa (meth) acrylate.

  (A) The polyfunctional (meth) acrylate is preferably hydrophobic. Hydrophobic polyfunctional (meth) acrylate refers to (meth) acrylate having no hydroxyl group. In the case of water-solubility, the cured product of the composition swells at the time of cutting, so that the position shift occurs and the processing accuracy may be inferior. Even if it is hydrophilic, it may be used as long as the cured product of the composition is not greatly swollen or partially dissolved by water.

  Among the polyfunctional (meth) acrylates, it is preferable to contain a polyfunctional (meth) acrylate oligomer / polymer and / or a bifunctional (meth) acrylate monomer in terms of high effect. It is more preferable to use a polymer and a bifunctional (meth) acrylate monomer in combination.

  When the polyfunctional (meth) acrylate oligomer / polymer and the bifunctional (meth) acrylate monomer are used in combination, the content ratio is 100 parts by mass in total of the polyfunctional (meth) acrylate oligomer / polymer and the bifunctional (meth) acrylate monomer. By mass ratio, polyfunctional (meth) acrylate oligomer / polymer: bifunctional (meth) acrylate monomer = 10 to 90:90 to 10 is preferable, 25 to 75:75 to 25 is more preferable, and 30 to 70:70 to 30 Is most preferred.

  (B) Monofunctional (meth) acrylate monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate , Isodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclo Pentenyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, methoxylated cyclodecatriene (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxy Propyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, glycidyl (meth) acrylate , Caprolactone-modified tetrahydrofurfuryl (meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, t-butyl Aminoethyl (meth) acrylate, ethoxycarbonylmethyl (meth) acrylate, phenol ethylene oxide modified (meth) acrylate, phenol (ethylene oxide 2 mol modified) (meth) Chryrate, phenol (ethylene oxide 4 mol modified) (meth) acrylate, paracumylphenol ethylene oxide modified (meth) acrylate, nonylphenol ethylene oxide modified (meth) acrylate, nonylphenol (ethylene oxide 4 mol modified) (meth) acrylate, nonylphenol ( Ethylene oxide 8 mol modified) (meth) acrylate, nonylphenol (propylene oxide 2.5 mol modified) (meth) acrylate, 2-ethylhexyl carbitol (meth) acrylate, ethylene oxide modified phthalic acid (meth) acrylate, ethylene oxide modified succinic acid ( (Meth) acrylate, trifluoroethyl (meth) acrylate, acrylic acid, methacrylic acid, ω-carboxy-polycaprolactone (Meth) acrylate, monohydroxyethyl phthalate (meth) acrylate, (meth) acrylic acid dimer, β- (meth) acryloyloxyethyl hydrogen succinate, n- (meth) acryloyloxyalkyl hexahydrophthalimide, 2 -(1,2-cyclohexacarboximido) ethyl (meth) acrylate, ethoxyethylene glycol di (meth) acrylate, benzyl (meth) acrylate and the like. Maleic acid and fumaric acid can also be used. (B) Monofunctional (meth) acrylate is more preferably hydrophobic as in (A). Hydrophobic monofunctional (meth) acrylate refers to (meth) acrylate having no hydroxyl group. In the case of water-solubility, the cured product of the composition swells at the time of cutting, so that the position shift occurs and the processing accuracy may be inferior. Even if it is hydrophilic, it may be used as long as the cured product of the composition is not swollen or partially dissolved by water.

  Among monofunctional (meth) acrylates, phenolethylene oxide 2 mol-modified (meth) acrylate, 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and 2-hydroxy-3 are effective. -One or more members selected from the group consisting of phenoxypropyl (meth) acrylate are preferred. Phenolethylene oxide 2 mol modified (meth) acrylate and 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and / or 2-hydroxy-3-phenoxypropyl (meth) acrylate may be used in combination. More preferred.

  When using phenol ethylene oxide 2 mol modified (meth) acrylate in combination with 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and / or 2-hydroxy-3-phenoxypropyl (meth) acrylate The content ratio is a total of 100 parts by mass of phenol ethylene oxide 2 mol modified (meth) acrylate, 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and 2-hydroxy-3-phenoxypropyl (meth) acrylate. In a mass ratio, phenol ethylene oxide 2 mol modified (meth) acrylate: 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and / or 2-hydroxy-3-phenoxypropyl (meth) acrylate = 5-80: 9 20 is preferably 15 to 60: 85 to 40 is more preferable, and 20 to 45: 80 to 55 being most preferred.

  (A) As for the usage-amount of polyfunctional (meth) acrylate, 5-95 mass parts is preferable with respect to 100 mass parts of total amounts of (A) and (B), 15-60 mass parts is more preferable, 20-20. 50 parts by mass is preferred. If it is 5 parts by mass or more, the property that the cured body will peel from the adherend when the cured body of the composition is immersed in warm water (hereinafter simply referred to as “peelability”) is sufficiently promoted. The cured product can be peeled into a film. If it is 95 mass parts or less, there is no possibility that initial adhesiveness will fall.

  (C) The photopolymerization initiator is blended for sensitization with visible light or ultraviolet active light to promote photocuring of the resin composition, and various known photopolymerization initiators can be used. . Specifically, benzophenone or a derivative thereof; benzyl or a derivative thereof; anthraquinone or a derivative thereof; benzoin; a benzoin derivative such as benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isobutyl ether, or benzyl dimethyl ketal; diethoxyacetophenone, 4 Acetophenone derivatives such as t-butyltrichloroacetophenone; 2-dimethylaminoethylbenzoate; p-dimethylaminoethylbenzoate; diphenyl disulfide; thioxanthone or derivatives thereof; camphorquinone; 7,7-dimethyl-2,3-dioxobicyclo [ 2.2.1] Heptane-1-carboxylic acid, 7,7-dimethyl-2,3-dioxobicyclo [2.2.1] heptane-1-carboxy-2 Bromoethyl ester, 7,7-dimethyl-2,3-dioxobicyclo [2.2.1] heptane-1-carboxy-2-methyl ester, 7,7-dimethyl-2,3-dioxobicyclo [2 2.1] Camphorquinone derivatives such as heptane-1-carboxylic acid chloride; 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethyl Α-aminoalkylphenone derivatives such as amino-1- (4-morpholinophenyl) -butanone-1; benzoyldiphenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, benzoyldiethoxyphosphine oxide, 2, 4,6-trimethylbenzoyldimethoxyphenylphosphine oxide, 2 Acylphosphine oxide derivatives such as 1,4,6-trimethylbenzoyldiethoxyphenylphosphine oxide, oxy-phenyl-acetic acid 2- [2-oxo-2-phenyl-acetoxy-ethoxy] -ethyl ester and / or oxy-phenyl -Acetic acid 2- [2-hydroxy-ethoxy] -ethyl ester and the like. A photoinitiator can be used 1 type or in combination of 2 or more types. Among these, benzyldimethyl ketal, oxy-phenyl-acetic acid 2- [2-oxo-2-phenyl-acetoxy-ethoxy] -ethyl ester and oxy-phenyl-acetic acid 2- One or more of the group consisting of [2-hydroxy-ethoxy] -ethyl ester are preferred.

  (C) 0.1-20 mass parts is preferable with respect to a total of 100 mass parts of (A) and (B), and, as for content of a photoinitiator, 0.5-10 mass parts is more preferable. If it is 0.1 mass part or more, the effect of hardening acceleration | stimulation will be acquired reliably, and sufficient curing rate can be obtained if it is 20 mass parts or less. The addition of 1 part by mass or more of component (C) makes it possible to cure without depending on the amount of light irradiation, further increases the degree of crosslinking of the cured product of the composition, and does not cause misalignment during cutting, It is further preferable in terms of improving peelability.

  The photocurable adhesive preferably contains a spacer (D) that does not dissolve in the components (A), (B), and (C) of the adhesive. Thereby, since the composition after hardening can hold | maintain fixed thickness, a process precision improves as mentioned later.

  The material of the spacer (D) may be either generally used organic particles or inorganic particles. Specifically, examples of the organic particles include polyethylene particles, polypropylene particles, crosslinked polymethyl methacrylate particles, and crosslinked polystyrene particles. Inorganic particles include ceramic particles such as glass, silica, alumina, and titanium.

  The spacer is preferably spherical from the viewpoint of improving processing accuracy, that is, controlling the film thickness of the adhesive layer 100. The average particle diameter of the spacer by the laser method is preferably in the range of 50 to 200 μm. If the average particle size of the spacer is 50 μm or more, even if the cutting tool tip having poor strength is used in the cutting tool, the life of the cutting tool is not reduced, and further, the cutting efficiency is improved, and 200 μm or less. In this case, the amount of adhesive used is reduced and the cost is reduced, so the productivity is excellent. A more preferable average particle diameter (D50: median diameter) is 70 to 150 μm, and more preferably 80 to 120 μm. The particle size distribution is measured by a laser diffraction type particle size distribution measuring device.

  The amount of the spacer (D) used is preferably 0.01 to 20 parts by mass with respect to 100 parts by mass of the total amount of (A) and (B), from the viewpoint of adhesiveness, processing accuracy, and peelability. 05-10 mass parts is more preferable, and 0.1-6 mass parts is the most preferable.

  A polymerization inhibitor (E) can be added to the photocurable adhesive to improve storage stability. Polymerization inhibitors include methyl hydroquinone, hydroquinone, 2,2-methylene-bis (4-methyl-6-tertiary butylphenol), catechol, hydroquinone monomethyl ether, monotertiary butyl hydroquinone, 2,5-ditertiary butyl hydroquinone. P-benzoquinone, 2,5-diphenyl-p-benzoquinone, 2,5-ditertiarybutyl-p-benzoquinone, picric acid, citric acid, phenothiazine, tertiary butylcatechol, 2-butyl-4-hydroxyanisole and 2 , 6-ditertiary butyl-p-cresol and the like.

  The amount of the polymerization inhibitor (E) used is preferably 0.001 to 3 parts by mass and more preferably 0.01 to 2 parts by mass with respect to 100 parts by mass of the total amount of (A) and (B). If it is 0.001 mass part or more, storage stability will be ensured, and if it is 3 mass parts or less, favorable adhesiveness will be obtained and it will not become uncured.

<Example 1>
1. Production of Photocurable Adhesive (I) The components (A) to (E) below were agitated using the agitator 400 described in the first embodiment to produce a photocurable adhesive (I).
(A) As a polyfunctional (meth) acrylate, “UV-3000B” (abbreviated as “UV-3000B” hereinafter referred to as “urethane acrylate”) manufactured by Nippon Gosei Co., Ltd., a polyol compound is a polyester polyol, and an organic polyisocyanate compound is isophorone diisocyanate. , 20 parts by mass of hydroxy (meth) acrylate is 2-hydroxyethyl acrylate), 15 parts by mass of dicyclopentanyl diacrylate (manufactured by Nippon Kayaku Co., Ltd., “KAYARAD R-684”, hereinafter abbreviated as “R-684”),
(B) As a monofunctional (meth) acrylate, 2- (1,2-cyclohexacarboximide) ethyl acrylate (“Aronix M-140” manufactured by Toa Gosei Co., Ltd., hereinafter abbreviated as “M-140”), 50 parts by mass; 15 parts by mass of phenol ethylene oxide 2 mol modified acrylate (“Aronix M-101A” manufactured by Toa Gosei Co., Ltd.)
(C) 10 parts by mass of benzyldimethyl ketal (“IRGACURE651” manufactured by BASF, hereinafter abbreviated as “BDK”) as a photopolymerization initiator,
(D) 1 part by weight of spherical crosslinked polystyrene particles having an average particle diameter of 100 μm (“GS-100S” manufactured by Ganz Kasei Co., Ltd.) as a spacer,
(E) 0.1 part by mass of 2,2-methylene-bis (4-methyl-6-tertiary butylphenol) (“Sumilyzer MDP-S” manufactured by Sumitomo Chemical Co., Ltd., hereinafter abbreviated as “MDP”) as a polymerization inhibitor

2. Preparation of plate glass laminate 12 plate glasses (width: 530 mm × length: 420 mm × thickness: 0.7 mm) are prepared as a light-transmitting hard substrate, and bonded together via the above-mentioned photocurable adhesive discharged from the discharge device. A curable adhesive was cured by light irradiation to produce a laminate of plate glass. Specifically, after 40 g of the above-mentioned photo-curable adhesive is applied on the first sheet glass, the second sheet glass is bonded onto the first sheet glass, and the surface of the second sheet glass is then bonded. The photocurable adhesive was cured by UV irradiation. The UV irradiation amount was 3000 mJ / cm ² (measured by an integrating illuminometer with a 365 nm light receiver), and the UV irradiation time was 40 seconds. By repeating this procedure, a plate glass laminate having a thickness of 8 mm (this thickness is the total thickness of the laminate of 12 plate glasses) made of 12 plate glasses was produced.

3. Next, after fixing the plate glass laminate to the cradle, the plate glass laminate was cut in the thickness direction along a predetermined cutting line by a disc cutter to produce a divided plate glass laminate. At this time, each plate glass was divided into a width of 100 mm, a length of 50 mm, and a thickness of 0.7 mm (this thickness is the thickness of one plate glass).

4). Next, the outer shape was processed by fixing the plate glass laminate divided into the cradle and grinding the plate glass laminate on the cradle using a rotating grindstone. At this time, some of the edges of the plate glass had chipping, cracks, and / or chips.

5. Next, a cutting tool (cutting jig) was attached to a 40 KHz ultrasonic spindle unit URT40-F41 manufactured by Takemasa. Next, the cutting tool attached to the ultrasonic spindle is installed at a position where the plurality of cutting ridges correspond to the respective adhesive layers of the sheet glass laminate, and the cutting ridges are removed from the side surfaces of the sheet glass laminate. The ridgeline was advanced so as to contact each adhesive layer, and the edges of the mutually opposing surfaces of the adjacent plate glasses were chamfered in the cross section of the plate glass laminate. At this time, the ultrasonic spindle was 40 KHz and the rotation speed was 2500 rpm. Cutting was performed until the V-shaped groove inclined at 45 ° on the side surface of the plate glass laminate had a depth of 0.2 mm.

Second Embodiment
A second embodiment will be described with reference to FIG. FIG. 12 is a schematic configuration diagram of the stirring device. In the present embodiment, as shown in FIG. 12, the storage tank 150 is closed with a lid 151, and the internal pressure can be adjusted so that the photocurable adhesive 10 can be pumped. Even in such a case, the same effect as the first embodiment can be obtained. In addition, compared with 2nd Embodiment, the accommodation tank 150 of 1st Embodiment has opened the upper part, and there exists a merit that replenishment of the photocurable adhesive agent 10 and the spacer 20 is easy.

  As shown in FIG. 12, a pressurizing means 270 and a decompression means 271 are connected to the storage tank 150. By actuating the pressurizing means 270 to increase the pressure in the storage tank 150, it is possible to act on the photocurable adhesive 10 to push the photocurable adhesive 10 from the storage tank 150 to the outside of the storage tank 150. The adhesive 10 can be pumped. The gas supplied into the storage tank 150 by the pressurizing means 270 is desirably a kind of inert gas such as nitrogen or helium that does not inhibit the UV curing reaction.

<Third Embodiment>
A third embodiment will be described with reference to FIG. FIG. 13 is a schematic configuration diagram of a stirring device. In the present embodiment, as shown in FIG. 13, the inlet 161k provided in the shaft portion 161 is at a position different from that in the first embodiment. Even in such a case, the same effect as the first embodiment can be obtained. The introduction port 161k may be provided at a position other than that shown in FIG. In addition, compared with 3rd Embodiment, the inlet 161k of 1st Embodiment is arrange | positioned facing the bottom face 150c of the storage tank 150, and, thereby, the photocurable adhesive 10 in the storage tank 150 is taken out effectively. In addition, the replenishment interval for replenishing the photocurable adhesive 10 and the spacer 20 into the storage tank 150 can be secured long.

<Fourth embodiment>
A fourth embodiment will be described with reference to FIG. FIG. 14 is a schematic diagram illustrating a configuration around a shaft portion of the stirring device. In this embodiment, as schematically shown in FIG. 14, the shaft portion 161 is formed by integrally providing the spiral guide 163 on the outer peripheral surface of the rod portion 165, and the cylindrical portion 164 shown in the above-described embodiment. A shaft portion 164 ′ corresponding to is provided separately from the shaft portion 161, and the cylindrical portion 164 ′ is fixed to the lid 151 of the storage tank 150 or the upper end of the storage tank 150 so as not to be rotatable in any manner. Yes. Even in such a case, the same effect as the first embodiment can be obtained. As shown in FIG. 14, there may be a space W167 between the outer peripheral end portion 163k of the spiral guide 163 and the inner peripheral surface of the tube portion 164 ′, and the shaft portion 161 in the tube portion 164 is formed by this space W167. Can be freely rotated. In FIG. 14, the rod portion 165 may be removed with the spiral guide 163 as an axis.

  Based on the above teaching, those skilled in the art can make various modifications to the embodiments. Whether the spacer floats or sinks in the photocurable adhesive is a non-essential matter, and in any case, it is within the scope of the present invention. The specific structure of the transport structure is arbitrary, as long as the target liquid is autonomously / automatically transported according to the rotation of the shaft portion.

500: Stirring system 400: Stirring device

10: Photocurable adhesive 20: Spacer 100: Adhesive layer

150: Storage tank 150c: Bottom surface

161: Shaft portion 161k: Inlet port 161r: Discharge port

162: stirring blade 162m: horizontal bar part 162p: vertical bar part

163: Spiral guide 164: Tube portion 165: Rod portion 166: Spiral flow path

173: Drive device 175: Discharge device 177: Open / close valve 179: Flow path

200: plate glass 201: plate glass 250: plate glass laminate 260: plate glass laminate

300: Treatment tank 310: Cutting jig

Claims (9)

A stirring device for stirring an adhesive mixed with a spacer,
A storage tank to store the adhesive mixed with the spacer;
Stirring means comprising a shaft portion and a stirring blade connected to the shaft portion, wherein the stirring blade can be arranged in the storage tank, and rotates in the storage tank with the shaft portion as a rotation shaft A stirring means that is possible, and
A transport structure for transporting the adhesive in which the spacers are dispersed in the storage tank according to the rotation of the stirring blade is provided integrally with the shaft portion, and the transport structure is configured to rotate the stirring blade. A stirrer that rotates according to the rotation of the shaft that causes movement, and causes the adhesive in which the spacer is dispersed to be conveyed from the inside of the storage tank to the outside of the storage tank.   The stirring device according to claim 1, wherein the transport structure includes a spiral guide that spirally extends along a rotation axis of the shaft portion.   The stirring device according to claim 2, wherein the transport structure further includes a cylindrical portion in which the spiral guide is provided. The transport structure further includes a bar portion extending along the rotation axis of the shaft portion,
The stirring device according to claim 3, wherein the spiral guide is provided on an outer peripheral surface of the bar portion.   The stirring device according to claim 3 or 4, wherein the adhesive inlet provided in the cylindrical portion is provided at a position facing the bottom surface of the storage tank.   The stirring blade includes at least one horizontal bar portion extending from the shaft portion toward the inner peripheral surface side of the storage tank, and at least one vertical bar portion extending from the horizontal bar portion in the depth direction of the storage tank. The stirrer according to any one of claims 1 to 5. Bonding the flat plate members together with the spacer-containing adhesive stirred with the stirring device according to any one of claims 1 to 6,
Cutting the laminate of the flat plate members obtained by the bonding step;
Removing the adhesive of the small-sized laminate obtained by the cutting step and individually separating the small-sized flat plate members constituting the small-sized laminate; and
Of manufacturing a small-sized flat plate member including   The step of processing the outer shape of the small-sized laminate, the step of chamfering the end of each flat plate member constituting the small-size laminate, or the small-size laminate as an etching solution The manufacturing method of the small sized flat member of Claim 7 further equipped with the process to immerse.   The method for manufacturing a small-sized flat plate member according to claim 7 or 8, wherein the flat plate member is a transparent substrate, and the adhesive is curable in response to incident light through the transparent substrate.

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