CN104460099B - Stripping auxiliary member, stripping device and stripping method - Google Patents
Stripping auxiliary member, stripping device and stripping method Download PDFInfo
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- CN104460099B CN104460099B CN201410466265.0A CN201410466265A CN104460099B CN 104460099 B CN104460099 B CN 104460099B CN 201410466265 A CN201410466265 A CN 201410466265A CN 104460099 B CN104460099 B CN 104460099B
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- peeling
- polarizing plate
- peeled
- auxiliary member
- laminate
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/10—Removing layers, or parts of layers, mechanically or chemically
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a peeling auxiliary member, a peeling apparatus and a peeling method. The peeling auxiliary member is used for forming a peeling starting point when the polarizing plate is peeled from a laminated body having a substrate and the polarizing plate adhered to one surface of the substrate, and is characterized by comprising: a bottom surface portion arranged along a surface of the laminate on the polarizing plate side; and a tip portion having a curved surface for bending the polarizing plate being peeled along the curved surface.
Description
Technical Field
The present invention relates to a peeling auxiliary member, a peeling apparatus, and a peeling method for peeling a polarizing plate from a laminate.
Background
conventionally, as a panel that can be applied to an image display portion of an image display device, a liquid crystal display panel, an organic EL display panel, and the like are known. These panels employ a laminate having: a substrate formed of a hard glass plate or the like; and a polarizing plate (polarizing film) bonded to one surface or both the front and back surfaces of the substrate via an adhesive.
The liquid crystal display panel and the like are manufactured by bonding a polarizing plate to a substrate, and the liquid crystal display panel is inspected after the manufacture. In this inspection process, there may be a case where a stain or damage occurs in the bonded polarizing plate, and a problem such as air or foreign matter is mixed between the polarizing plate and the substrate. In this case, the obtained substrate can be reused for manufacturing other liquid crystal display panels or the like by peeling the polarizing plate from the liquid crystal display panel or the like. The step of peeling the polarizing plate in this way is generally called rework.
Here, such a peeling device for peeling the polarizing plate from the laminate is proposed. For example, there is proposed a polarizing plate peeling apparatus including: a winding roller for winding one end of the polarizing plate being peeled from the substrate of the liquid crystal display panel; and a pressing roller (peeling auxiliary member) for pressing the liquid crystal display panel via the polarizing plate. In this peeling apparatus, the surface of the liquid crystal display panel on the polarizing plate side is pressed by a pressing roller, and the polarizing plate being peeled is bent along the peripheral surface of the pressing roller, and the bent polarizing plate is sequentially wound by a rotating winding roller. By this winding operation, the polarizing plate can be further peeled off by the pressing roller, and the peeled polarizing plate can be sequentially wound up.
In this way, in the peeling apparatus having the pressing roller, the winding force of the winding member can be converted into a force for peeling the polarizing plate by the pressing roller.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2009-29561
Disclosure of Invention
Problems to be solved by the invention
However, it is known that the polarizing plate attached to the substrate in the liquid crystal display panel is not originally intended to be peeled. That is, the polarizing plate is bonded to the substrate with a much stronger adhesive force than the case where one film is originally bonded to another member on the premise of being peeled off.
Therefore, when the polarizing plate is peeled by using the peeling device, the polarizing plate is peeled against the strong adhesive force, and thus, an extremely high tension is applied to the pressing roller. As a result, the pressing roller is bent, and the balance of the tension in the longitudinal direction of the pressing roller is broken, which may cause breakage of the polarizing plate. When the polarizing plate is broken and a part of the broken polarizing plate remains on the press roller, the remaining polarizing plate needs to be separately peeled, and accordingly, it is difficult to peel the polarizing plate.
Further, when the pressing roller is bent, it is necessary to use another new pressing roller, and it is hard to say that the polarizing plate can be easily peeled off by using the above peeling device.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a peeling auxiliary member, a peeling apparatus, and a peeling method that can easily peel a polarizing plate from a substrate.
Means for solving the problems
the peeling auxiliary member of the present invention is a member for peeling off a polarizing plate from a laminate having a substrate and the polarizing plate adhered to one surface of the substrate,
the peeling auxiliary member includes: a bottom surface portion arranged along a surface of the laminate on the polarizing plate side; and a tip portion having a curved surface for bending the polarizing plate being peeled along the curved surface.
According to the peeling auxiliary member of the above configuration, it is preferable that the peeling auxiliary member further includes: and an inclined portion that is inclined from the distal end portion toward the proximal end side and away from the bottom surface portion.
According to the peeling auxiliary member having the above configuration, it is preferable that the angle formed by the inclined portion with respect to a plane parallel to the bottom surface portion is 10 ° to 30 °.
According to the peeling auxiliary member configured as described above, the radius of curvature of the distal end portion is preferably 2.5mm to 17.5 mm.
The peeling apparatus of the present invention includes: the peeling auxiliary member; and a peeling member for holding one end portion of the polarizing plate peeled from the laminate and bent by the peeling auxiliary member, and further sequentially peeling the polarizing plate.
In the peeling apparatus having the above configuration, it is preferable that the peeling member is a winding member including: the method can be used for sequentially winding the polarizing plates while further peeling the polarizing plates by rotating one end of the polarizing plates peeled from the laminated body and bent by the peeling auxiliary member.
The peeling method of the present invention comprises: a holding step of peeling one end portion of the polarizing plate from a laminate including a substrate and a polarizing plate bonded to one surface of the substrate and holding the one end portion with a peeling member; and a peeling step of guiding the polarizing plate being peeled to the peeling member while bending the polarizing plate along a distal end portion of the peeling auxiliary member by a peeling auxiliary member, and further peeling the polarizing plate in sequence by the peeling member to peel the polarizing plate from the laminate, wherein the peeling auxiliary member includes: a bottom surface portion arranged along a surface of the laminate on the polarizing plate side; and a tip portion having a curved surface for bending the polarizing plate being peeled along the curved surface.
According to the peeling method configured as described above, it is preferable that the peeling auxiliary member further includes: and an inclined portion that is inclined from the distal end portion toward the proximal end side and away from the bottom surface portion, wherein the peeling auxiliary member guides the polarizing plate guided along the distal end portion to the peeling member along the inclined portion.
According to the peeling method having the above configuration, it is preferable that a winding member is used as the peeling member, one end portion of the polarizing plate is peeled off and wound around the winding member in the holding step, and the polarizing plate is further peeled off sequentially by the winding member in the peeling step, and the polarizing plate is peeled from the laminate.
drawings
Fig. 1 is a schematic side view showing a peeling apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic plan view showing the peeling device of the present embodiment.
Fig. 3 is a schematic side view showing a peeling auxiliary member provided in the peeling apparatus of the present embodiment.
Fig. 4 is a schematic side view showing a state where the polarizing plate is peeled from the laminate in a case where the radius of curvature of the distal end portion of the peeling auxiliary member is large.
Fig. 5 is a schematic side view showing a state where the polarizing plate is peeled from the laminate in a case where the radius of curvature of the distal end portion of the peeling auxiliary member is small.
Fig. 6 is a schematic side view showing a state where one end of the peeled polarizing plate is wound around the winding member.
Fig. 7 is a schematic side view showing a state in which the polarizing plate is further peeled by the rotation of the winding member and the peeled polarizing plate is sequentially wound.
fig. 8 is a schematic side view showing a state after the polarizing plate is completely peeled off by the rotation of the winding member.
Fig. 9 is a schematic side view showing an example of the layer structure of a laminate to which the peeling apparatus and the peeling method of the present embodiment can be applied.
fig. 10 is a schematic side view showing an example of the layer structure of the polarizing plate of the laminate of fig. 9.
fig. 11 is a schematic side view showing a peeling apparatus according to another embodiment of the present invention.
Fig. 12 is a schematic plan view showing the peeling device of the present embodiment.
Fig. 13 is a schematic side view showing a state where the polarizing plate is further peeled by the peeling member.
Detailed Description
The following describes a peeling auxiliary member, a peeling apparatus, and a peeling method according to embodiments of the present invention.
First, a peeling apparatus including the peeling auxiliary member of the present embodiment will be described.
As shown in fig. 1, 2, and 3, the peeling apparatus 1 of the present embodiment includes: a stage member 3 on which a laminate 30 is placed, the laminate 30 including a substrate 31 and a polarizing plate 33 bonded to one surface 31a (see fig. 9) of the substrate 31; a peeling auxiliary member 7 having a plate shape and including a bottom surface portion 7a and a tip end portion 7b, the bottom surface portion 7a being disposed along a surface 33a of the laminated body 30 on the polarizing plate 33 side, the tip end portion 7b having a curved surface (tip edge) 7ba, the curved surface (tip edge) 7ba being for bending the polarizing plate 33 being peeled along the curved surface (tip edge) 7 ba; and a peeling member 5 for holding one end 33b of the polarizing plate 33 peeled from the laminate 30 and bent by the peeling auxiliary member 7, and further sequentially peeling off the polarizing plate 33.
More specifically, in the peeling apparatus 1 of the present embodiment, the winding member 5 is used as the peeling member 5, and the winding member 5 can wind up the one end portion 33b of the polarizing plate 33 peeled from the laminated body 30 and bent by the peeling auxiliary member 7, and can further peel the polarizing plate 33 by rotation and sequentially wind up the polarizing plate 33.
Moreover, the peeling apparatus 1 further includes: and a 1 st supporting member 9 disposed between the winding member 5 and the peeling auxiliary member 7, for pressing the stacked body 30 toward the table member 3, and sandwiching and supporting the stacked body 30 together with the table member 3. The peeling apparatus 1 further includes: and a 2 nd support member 11 which is disposed on the opposite side of the winding member 5 (on the left side of the peeling auxiliary member 7 in fig. 1) with the peeling auxiliary member 7 interposed therebetween, presses the substrate 31 exposed by peeling of the polarizing plate 33 toward the stage member 3, and sandwiches and supports the substrate 31 together with the stage member 3.
The peeling apparatus 1 further includes a fixing member 15. The winding member 5, the peeling auxiliary member 7, the 1 st supporting member 9, and the 2 nd supporting member 11 are fixed to the table member 3 by the fixing member 15.
The stage member 3 is a stage on which the laminate 30 is placed until all of the polarizing plates 33 are peeled off from the laminate 30.
The winding member 5 is used to wind up one end 33b of the polarizing plate 33 being peeled, and further peels off the polarizing plate 33 by rotating in this state and sequentially winds up the polarizing plate 33.
Examples of the winding member 5 include a roller that is driven to rotate by a driving device 17 such as a motor.
One end 33b of the peeled polarizing plate 33 is fixed to the winding member 5 with an adhesive tape (not shown) or the like.
Fig. 2 shows a state in which the polarizing plate 33 is peeled off together with the adhesive layer 35 (see fig. 9).
As shown in fig. 2 and 3, the peeling auxiliary member 7 has a vertically long plate shape and has a bottom surface portion 7a and a distal end portion 7 b. In the present embodiment, the peeling auxiliary member 7 further includes: and an inclined portion 7c that is inclined from the distal end portion 7b toward the base end side (the downstream side in the peeling direction X, the right side in fig. 3) and away from the bottom surface portion 7 a.
The peeling auxiliary member 7 is formed by: the length (maximum length) L in the direction from the distal end side to the proximal end side (peeling direction X) is greater than the height (maximum height) H from the bottom surface (surface of the bottom surface portion 7 a).
Preferably, the ratio of the height H to the length L (H: L) is 1: 3-1: 5.
Preferably, the height H is 15mm to 20mm, and the length L is 50mm to 75 mm.
The bottom surface portion 7a is disposed along a surface 33a of the laminate 30 on the polarizing plate 33 side. Specifically, the bottom surface portion 7a is disposed at a position that can achieve the following: when the polarizing plate 33 is peeled off by the peeling auxiliary member 7, the bottom surface portion 7a comes into contact with the laminate 30 and the laminate 30 is suppressed from floating. The arrangement of the bottom surface portion 7a is not particularly limited as long as the bottom surface portion 7a is in contact with the laminate 30 at the time of the peeling and the laminate 30 is prevented from floating. For example, before the start of peeling by the peeling auxiliary member 7, the bottom surface portion 7a may be disposed in contact with the surface 33a on the polarizing plate 33 side, or may be disposed in the vicinity of the surface 33a so as not to be in contact with the surface 33 a.
The leading end portion 7b is located on the upstream side (left side in fig. 1) of the winding member 5 in the peeling direction X (direction from the leading end side toward the base end side of the peeling auxiliary member 7). With this arrangement, the polarizing plate 33 being peeled can be bent along the distal edge 7ba of the distal end portion 7b, and the polarizing plate 33 can be guided to the base end side (the downstream side in the peeling direction X) of the peeling auxiliary member 7. That is, the peeled polarizing plate 33 can be guided to the winding member 5.
The radius of curvature R of the distal edge 7ba of the distal end portion 7b is not particularly limited and can be set as appropriate.
Here, as described above, since the adhesion between the polarizing plate 33 and the substrate 31 is extremely high, the peeled polarizing plate 33 hardly follows (the distal edge 7ba of) the distal end portion 7b in the vicinity of the peeling start point S. As shown in fig. 4, the following tendency is present: as the curvature radius R of the distal end portion 7b increases, the gap between the peeled polarizing plate 33 and the distal end portion 7b increases. That is, the peeling start point S is easily located at a position farther (upstream side, left side in fig. 4) from the contact portion M between the tip end portion 7b and the laminate 30.
On the other hand, as shown in fig. 5, there is a tendency that: as the radius of curvature R of the distal end portion 7b decreases, the gap between the peeled polarizing plate 33 and the distal end portion 7b decreases. That is, the peeling start point S is easily located at a position closer to (downstream side, right side in fig. 5) the contact portion M between the tip end portion 7b and the laminate 30.
Further, as the gap between the peeled polarizing plate 33 and the tip portion 7b becomes larger, the force for peeling the polarizing plate 33 converted via the tip portion 7b is likely to be deviated in the longitudinal direction (the direction perpendicular to the peeling direction X) of the peeling auxiliary member 7. Moreover, the substrate 31 is easily broken.
Furthermore, it is known from the technical common knowledge that when the curvature radius R is too small, the distal end portion 7b becomes too sharp, and the polarizing plate 33 is easily cut.
Therefore, the radius of curvature R of the distal edge 7ba of the distal end portion 7b is appropriately set in consideration of the above-described point of view, for example, and is preferably 2.5mm to 17.5 mm.
By setting the radius of curvature R of the distal end portion 7b to 17.5mm or less, the peeling start point S of the polarizing plate 33 can be brought close to the contact portion M between the laminate 30 and the bottom surface portion 7 a. Accordingly, the force for peeling the polarizing plate 33 transmitted through the distal end portion 7b is less likely to vary in the extending direction of the distal end portion 7b (the direction perpendicular to the peeling direction X), and thus the polarizing plate 33 is more less likely to break. In addition, the occurrence of breakage of the substrate 31 can be further suppressed.
Further, by setting the radius of curvature R of the distal end portion 7b to 2.5mm or more, it is possible to suppress the distal edge 7ba from becoming too sharp, and it is possible to make it difficult to cut the polarizing plate 33.
Thus, the polarizing plate 33 can be more easily peeled off from the substrate 31.
The inclined portion 7c is used to further guide the polarizing plate 33 guided by the distal end portion 7b to the base end side (the downstream side in the peeling direction X) of the peeling auxiliary member 7.
By providing the peeling auxiliary member 7 with the inclined portion 7c, the peeled polarizing plate 33 can be guided by the tip portion 7b and then can be further guided by the inclined portion 7 c. That is, the path of the polarizing plate (peeled polarizing plate) 33 after passing through the distal end portion 7b can be maintained at the predetermined angle θ 1 by the inclined portion 7 c. This can suppress the change in the angle θ 1 of the peeled polarizing plate 33, and thus can suppress the change in the tension applied to the distal end portion 7b due to the change in the angle θ 1.
In this case, the balance state of the tension applied to the peeling auxiliary member 7 can be further suppressed from being broken, and therefore, the polarizing plate 33 can be more easily peeled from the substrate 31.
Preferably, the angle θ 1 formed by the inclined portion 7c with respect to the plane T parallel to the stacked body 30 is 10 ° to 30 °.
In this case, by setting the angle θ 1 of the inclined portion 7c to 10 ° to 30 °, the peeling auxiliary member 7 can be pressed against the laminated body 30 by the peeled polarizing plate 33, and the polarizing plate 33 can be guided to the base end side.
Thus, the peeling auxiliary member 7 can be further stabilized, and the polarizing plate 33 can be more easily peeled from the substrate 31.
Examples of the material for forming the peeling auxiliary member 7 include stainless steel, carbon tool steel, high-speed tool steel, chromium molybdenum steel, manganese steel, and other alloy-based materials and ceramic materials. Further, the peeling auxiliary member 7 may be either hollow or solid.
In order to make the peeled polarizing plate 33 slide on the surface of the distal edge 7ba of the distal end portion 7b relatively easily, it is preferable to subject the distal edge 7ba to a mold release treatment. The mold release treatment can be performed in the following manner: the distal end portion 7ba is subjected to surface treatment such as saturated polyester coating or double coating (japanese patent No. バ イ コ ー ト), or a conductive tape is attached to the distal end portion 7ba, whereby it is possible to achieve relatively easy sliding at the distal end portion 7 ba.
The 1 st supporting member 9 is disposed between the winding member 5 and the peeling auxiliary member 7, and is configured to press the stacked body 30 toward the table member 3, and to sandwich and support the stacked body 30 together with the table member 3. With this 1 st supporting member 9, the laminate 30 (and the exposed substrate 31) can be prevented from floating from the stage member 3 when the polarizing plate 33 is peeled off by the winding operation of the winding member 5, and therefore, the polarizing plate 33 can be peeled off more easily.
The 1 st supporting member 9 may be a rubber roller, for example.
The 2 nd support member 11 is disposed on the opposite side of the winding member 5 with the peeling auxiliary member 7 interposed therebetween, and is configured to press the substrate 31 exposed by peeling of the polarizing plate 33 against the stage member 3, and to hold and support the substrate 31 together with the stage member 3. The second support member 11 can prevent the substrate 31 (and further, the laminated body 30 exposed together with the substrate 31) from being lifted from the stage member 3 when the polarizing plate 33 is peeled off by the winding operation of the winding member 5. This makes it easier to peel off the polarizing plate 33.
The 2 nd supporting member 11 can be a rubber roller, for example.
The fixing member 15 is used to fix the winding member 5, the peeling auxiliary member 7, the 1 st support member 9, and the 2 nd support member 11 to the table member 3 at a predetermined position in the peeling direction X (the longitudinal direction of the table member 3) and at a predetermined position (height) in a direction perpendicular to (the upper surface of) the table member 3.
in the present embodiment, as described above, the winding member 5, the peeling auxiliary member 7, the 1 st supporting member 9, and the 2 nd supporting member 11 are fixed at predetermined positions on the table member 3 by the fixing members 15, respectively. That is, the winding member 5, the peeling auxiliary member 7, the 1 st support member 9, and the 2 nd support member 11 do not move relative to the stage member 3 in the peeling direction X from the start of peeling the polarizing plate 33 from the laminate 30 by the winding member 5 to the end of peeling (all the polarizing plates 33 are peeled).
Next, the operation of peeling the polarizing plate by the peeling apparatus 1 will be described, and a peeling method according to the present embodiment will be described.
The peeling method of the present embodiment, which is performed by the peeling apparatus 1, includes:
A holding step of peeling one end 33b of the polarizing plate 33 from a laminate 30 having a substrate 31 and the polarizing plate 33 bonded to one surface 31a of the substrate 31 and holding the one end 33b by a peeling member 5; and a peeling step of bending the polarizing plate 33 being peeled by the plate-shaped peeling auxiliary member 7 along the distal end edge 7ba of the distal end portion 7b and guiding the polarizing plate 33 to the peeling member 5, and further peeling off the polarizing plate 33 in order by the peeling member 5 to peel off the polarizing plate 33 from the laminated body 30, wherein the plate-shaped peeling auxiliary member 7 includes: a bottom surface portion 7a disposed along a surface 33a of the laminate 30 on the polarizing plate 33 side; and a tip portion 7b having a curved surface (tip edge) 7ba, the curved surface (tip edge) 7ba being used for bending the polarizing plate 33 being peeled along the curved surface (tip edge) 7 ba.
More specifically, in the present embodiment, the winding member 5 is used as the peeling member 5, and the holding step performs the winding step of: one end 33b of the polarizing plate 33 is peeled off, and the one end 33b is wound around the winding member 5, and in the peeling step, the polarizing plate 33 is further peeled off by the winding member 5 and the polarizing plate 33 is sequentially wound up, thereby peeling the polarizing plate 33 from the laminate 30.
In the winding step, the one end 33b of the polarizing plate 33 can be peeled off from the laminate 30, for example, in the following manner. That is, a peeling blade (not shown) having a blade portion at the tip end is pinched by a finger of an operator, and the peeling blade is inserted between the substrate 31 and the polarizing plate 33 of the laminate 30, thereby peeling off a part of the polarizing plate 33. More specifically, the peeling blade is inserted between the adhesive layer 35 of the laminate 30 and the substrate 31, and then the polarizing plate 33 is peeled together with the adhesive layer 35 (see fig. 1, 6, and 9).
The one end 33b of the polarizing plate 33 that has been peeled off can be wound around the winding member 5, for example, in the following manner. That is, in order to wind the one end portion 33b of the peeled polarizing plate 33 around the circumferential surface of the winding member 5, the one end portion 33b is fixed to the circumferential surface by an adhesive tape (not shown) or the like.
In the peeling step, the peeled polarizing plate 33 is bent along the distal end edge 7ba of the distal end portion 7b by the peeling auxiliary member 7, the polarizing plate 33 is guided to the winding member 5, and the polarizing plate 33 is further peeled by the winding member 5 and the peeled polarizing plate 33 is sequentially wound.
More specifically, the laminate 30 is prevented from floating by the peeling auxiliary member 7, the peeled polarizing plate 33 is bent along the distal end edge 7ba of the distal end portion 7b, the polarizing plate 33 is guided to the winding member 5, and the peeled polarizing plate 33 is sequentially wound while the polarizing plate 33 is further peeled by the winding member 5.
At this time, the 1 st supporting member 9 presses the stacked body 30 toward the table member 3, and supports the stacked body 30 while sandwiching it with the table member 3. The 2 nd supporting member 11 presses the substrate 31 exposed by peeling of the polarizing plate 33 toward the stage member 3, and holds and supports the exposed substrate 31 together with the stage member 3.
Here, the peeling auxiliary member 7 is inclined at an angle θ 2 with respect to the absorption axis direction Y (see the broken-line arrow in fig. 2) of the polarizing plate 33 in the laminate 30. When the peeling auxiliary member 7 is closer to being parallel to the absorption axis direction Y (angle θ 2 is 0 °) and closer to being perpendicular to the absorption axis direction Y (angle θ 2 is 90 °), the more likely the polarizing plate 33 is broken at the time of peeling. Therefore, in view of this point, the angle θ 2 is preferably 40 ° to 50 °. Fig. 2 shows a configuration in which the absorption axis direction Y of the polarizing plate 33 is parallel to the longitudinal direction of the laminate 30, and the peeling auxiliary member 7 is disposed so that the angle θ 2 is 45 °.
When the polarizing plates 33 are sequentially wound up while further peeling off the polarizing plates 33 by the winding member 5 from the state shown in fig. 6, the laminate 30 sequentially moves to the side opposite to the peeling direction X (see the open arrow) as shown in fig. 7 and 8 as the peeling off of the polarizing plates 33 progresses. That is, the stacked body 30 moves relative to the table member 3. More specifically, the stacked body 30 slides on the table member 3. As shown in fig. 8, when all the polarizing plates 33 are finally peeled off and the substrate 31 is completely exposed, the movement of the laminate 30 is stopped.
As shown in fig. 9, the laminate 30 to which the peeling apparatus 1 and the peeling method for a polarizing plate of the present embodiment can be applied includes: a substrate 31; an adhesive layer 35 formed on one surface 31a of the substrate 31; and a polarizing plate 33 laminated on the adhesive layer 35.
Examples of the substrate 31 include a liquid crystal display panel and an organic EL display panel.
As shown in fig. 10, in the present embodiment, specifically, the polarizing plate 33 includes: a polarizing plate 41; adhesive layers 43 formed on both surfaces of the polarizing plate 41; and protective films 45 laminated on the adhesive layers 43, respectively.
In this case, although the polarizing plate 33 has the protective film 45 laminated on both surfaces of the polarizing plate 41 in the present embodiment, the polarizing plate 33 may have the protective film 45 laminated on one surface of the polarizing plate 41 in the present invention.
The thickness of the polarizing plate 33 is not particularly limited. However, there is a tendency that: for example, when the thickness of the polarizing plate 33 is smaller, the strength is more reduced and the breakage is more likely to occur, and on the other hand, the following tendency is present: as the thickness of the polarizing plate 33 is larger, the strength is more increased and the breakage is more difficult. Therefore, for example, in view of this point, the thickness of the polarizing plate 33 is 200 μm or less, preferably 90 μm or less, and more preferably 50 μm or less. In this case, the peeling apparatus 1 and the peeling method of the present embodiment can be preferably applied when the thickness is 200 μm or less. This is because even when the thickness is small, the equilibrium state of the tension applied to the polarizing plate 33 is suppressed from being broken, and the polarizing plate 33 is less likely to be broken during peeling.
The material of the polarizing plate 33 is not particularly limited. However, as will be described later, the peeling apparatus 1 and the peeling method according to the present embodiment can be preferably applied to a case where the polarizing plate 33, particularly the protective film 45 therein, is easily broken.
Examples of the polarizing plate 41 include a polarizing plate formed by dyeing and stretching a polyvinyl alcohol film.
The thickness of the polarizing plate 41 is about 2 μm to 30 μm.
Examples of the material for forming the adhesive layer 43 include conventionally known adhesives.
Examples of the protective film 45 include films made of cellulose resins such as triacetylcellulose, polyester resins, polyethersulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins, cyclic polyolefin resins (norbornene resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures of these resins.
Among these, the protective film formed of a (meth) acrylic resin is low in strength and is easily broken, and therefore, the peeling apparatus 1 and the peeling method of the present embodiment can be preferably applied to the protective film.
the above (meth) acrylic acid means at least one of methacrylic acid and acrylic acid.
The Tg (glass transition temperature) of the (meth) acrylic resin is preferably 115 ℃ or higher, more preferably 120 ℃ or higher, still more preferably 125 ℃ or higher, and particularly preferably 130 ℃ or higher. When the Tg is 115 ℃ or higher, the polarizing plate 33 can have excellent durability. The upper limit of the Tg of the (meth) acrylic resin is not particularly limited, but is preferably 170 ℃ or lower from the viewpoint of moldability and the like. A film having substantially zero in-plane retardation (Re) and substantially zero thickness direction retardation (Rth) can be obtained from the (meth) acrylic resin.
Examples of the (meth) acrylic resin include poly (meth) acrylates such as polymethyl methacrylate, methyl methacrylate- (meth) acrylic acid copolymers, methyl methacrylate- (meth) acrylate copolymers, methyl methacrylate-acrylate- (meth) acrylic acid copolymers, methyl (meth) acrylate-styrene copolymers (such as MS resins), and polymers having an alicyclic hydrocarbon group (such as methyl methacrylate-cyclohexyl methacrylate copolymers and methyl methacrylate- (meth) acrylic acid norbornyl ester copolymers). Preferred examples thereof include a poly (meth) acrylic acid C1-6 alkyl ester such as poly (meth) acrylic acid methyl ester. More preferably, a methyl methacrylate resin containing methyl methacrylate as a main component (50 to 100% by weight, preferably 70 to 100% by weight) can be cited.
Specific examples of the (meth) acrylic resin include (meth) acrylic resins having an intramolecular cyclic structure as described in ア ク リ ペ ッ ト VH, ア ク リ ペ ッ ト VRL20A, and jp 2004-a 70296, manufactured by mitsubishi レ イ ヨ ン corporation, and high Tg (meth) acrylic resins obtained by intramolecular crosslinking and intramolecular cyclization reactions.
The (meth) acrylic resin having a lactone ring structure may be used. The reason is that it has high heat resistance, high transparency, and high mechanical strength by biaxial stretching.
Examples of the (meth) acrylic resin having a lactone ring structure include (meth) acrylic resins having a lactone ring structure described in Japanese patent laid-open Nos. 2000-230016, 2001-151814, 2002-120326, 2002-254544 and 2005-146084.
The (meth) acrylic resin having a lactone ring structure preferably has a ring structure represented by the following general formula (formula 1).
Wherein R1, R2 and R3 each independently represents a hydrogen atom or an organic residue having 1 to 20 carbon atoms. Furthermore, the organic residue may contain an oxygen atom.
The content of the lactone ring structure represented by the general formula (formula 1) in the structure of the (meth) acrylic resin having a lactone ring structure is preferably 5 to 90% by weight, more preferably 10 to 70% by weight, still more preferably 10 to 60% by weight, and particularly preferably 10 to 50% by weight. When the content of the lactone ring structure represented by the general formula (formula 1) in the structure of the (meth) acrylic resin having a lactone ring structure is less than 5% by weight, heat resistance, solvent resistance, and surface hardness may be insufficient. When the content of the lactone ring structure represented by the general formula (formula 1) in the structure of the (meth) acrylic resin having a lactone ring structure is more than 90% by weight, the molding processability may be poor.
The weight average molecular weight of the (meth) acrylic resin having a lactone ring structure is preferably 1000 to 2000000, more preferably 5000 to 1000000, further preferably 10000 to 500000, and particularly preferably 50000 to 500000. If the weight average molecular weight deviates from the above range, the moldability may become poor.
the Tg of the (meth) acrylic resin having a lactone ring structure is preferably 115 ℃ or higher, more preferably 120 ℃ or higher, still more preferably 125 ℃ or higher, and particularly preferably 130 ℃ or higher. When the Tg is 115 ℃ or higher, the durability of the polarizing plate 33 containing the resin becomes excellent. The upper limit of Tg of the (meth) acrylic resin having a lactone ring structure is not particularly limited, but is preferably 170 ℃ or lower from the viewpoint of moldability and the like.
the molded article obtained by injection molding of the (meth) acrylic resin having a lactone ring structure has a higher total light transmittance as measured by the method of ASTM-D-1003, and is preferably 85% or more, more preferably 88% or more, and still more preferably 90% or more. The total light transmittance is a reference value of transparency, and if the total light transmittance is less than 85%, the transparency may be reduced.
The thickness of the protective film 45 is usually about 20 μm to 60 μm.
In the present embodiment, the adhesion between the polarizing plate 33 and the substrate 31 is usually 5N to 15N. With this level of adhesion, the polarizing plate 33 can be more firmly adhered to the substrate 31. Even when the polarizing plate 33 strongly bonded in this manner is peeled, the peeling auxiliary member 7 can be prevented from being deformed (bent). Therefore, the peeling apparatus 1 and the peeling method of the present embodiment are suitable for the laminate 30 having the adhesive force in the above range.
The adhesion was measured by Autograph (precision universal testing machine, manufactured by shimadzu corporation).
As described above, the peeling auxiliary member 7 of the present embodiment is used for peeling the polarizing plate 33 from the laminate 30 including the substrate 31 and the polarizing plate 33 bonded to one surface 31a of the substrate 31,
The peeling auxiliary member 7 includes: a bottom surface portion 7a disposed along a surface 33a of the laminate 30 on the polarizing plate 33 side; and a tip portion 7b having a curved surface (tip edge) 7ba, the curved surface (tip edge) 7ba being used for bending the polarizing plate 33 being peeled along the curved surface (tip edge) 7 ba.
With this configuration, when the polarizing plate 33 is peeled off from the substrate 31 by the peeling auxiliary member 7, the polarizing plate 33 can be peeled off via the distal end portion 7b and the bottom surface portion 7a, and the peeled polarizing plate 33 can be bent along the distal edge 7ba of the distal end portion 7b to guide the polarizing plate 33 to the proximal end side, so that the polarizing plate 33 can be guided to the proximal end side while preventing the polarizing plate 33 from being broken.
Further, since the peeling auxiliary member 7 has the bottom surface portion 7a, the tension applied to the distal end portion 7b during peeling can be dispersed to the remaining portion (the portion on the proximal end side), and therefore, the peeling auxiliary member 7 can be prevented from being bent by the tension as compared with a peeling auxiliary member formed in a roll shape. This can suppress the breakdown of the equilibrium state of the tension applied to the peeling auxiliary member 7, and thus can suppress the occurrence of defects such as cracking of the polarizing plate 33 due to the breakdown of the equilibrium state.
Further, since the peeling auxiliary member 7 is hard to bend as described above, the durability thereof is excellent.
Further, since the peeling auxiliary member 7 is so excellent in durability, the radius of curvature R of the distal end portion 7b can be made smaller than that of a peeling auxiliary member formed in a roll shape, whereby the balanced state collapse of the tension applied to the peeling auxiliary member 7 can be suppressed, and the substrate 31 can be suppressed from being broken.
thus, the polarizing plate 33 can be easily peeled off from the substrate.
According to the peeling auxiliary member 7 structured as described above, it is preferable that the peeling auxiliary member 7 further includes: and an inclined portion 7c that is inclined from the distal end portion 7b toward the proximal end side and away from the bottom surface portion 7 a.
With this configuration, by providing the inclined portion 7c, the peeled polarizing plate 33 can be guided to the base end side by the inclined portion 7c after being guided by the distal end portion 7 b. That is, the path of the peeled polarizing plate 33 after passing through the distal end portion 7b can be maintained at the predetermined angle θ 1 by the inclined portion 7 c. This can suppress the change in the angle θ 1 of the peeled polarizing plate 33, and thus can suppress the change in the tension applied to the distal end portion 7b due to the change in the angle θ 1.
Therefore, the balance state breakdown of the tension applied to the peeling auxiliary member 7 can be further suppressed, and therefore, the polarizing plate 33 can be more easily peeled from the substrate 31.
according to the peeling assisting member 7 having the above configuration, it is preferable that the angle θ 1 formed by the inclined portion 7c with respect to the plane T parallel to the bottom surface portion 7a is 10 ° to 30 °.
With this configuration, by setting the angle θ 1 of the inclined portion 7c to 10 ° to 30 °, the peeling auxiliary member 7 can be pressed against the laminate 30 by the peeled polarizing plate 33, and the polarizing plate 33 can be guided to the proximal end side.
Thus, the peeling auxiliary member 7 can be further stabilized, and the polarizing plate 33 can be more easily peeled from the substrate 31.
According to the peeling auxiliary member 7 configured as described above, the radius of curvature R of the distal end portion 7b is preferably 2.5mm to 17.5 mm.
With this configuration, the peeling start point S of the polarizing plate 33 can be brought close to the contact portion M between the laminate 30 and the bottom surface portion 7a of the peeling auxiliary member 7 by setting the radius of curvature R of the distal end portion 7b to 17.5mm or less. Accordingly, the force for peeling the polarizing plate 33 transmitted through the distal end portion 7b is less likely to vary in the extending direction (direction perpendicular to the peeling direction) of the distal end portion 7b of the peeling auxiliary member 7, and thus the polarizing plate 33 is more less likely to be broken. In addition, the occurrence of breakage of the substrate 31 can be further suppressed. Further, by setting the radius of curvature R of the distal end portion 7b to 2.5mm or more, it is possible to suppress the distal edge 7ba from becoming too sharp, and it is possible to make it difficult to cut the polarizing plate 33.
Thus, the polarizing plate 33 can be more easily peeled off from the substrate 31.
The peeling apparatus 1 of the present embodiment includes: the peeling auxiliary member 7; and a peeling member 5 for holding one end 33b of the polarizing plate 33 peeled from the laminate 30 and bent by the peeling auxiliary member 7, and further sequentially peeling the polarizing plate 33.
With this configuration, as described above, the polarizing plate 33 that has been peeled off can be bent along the distal edge 7ba of the distal end portion 7b, and the polarizing plate 33 can be guided to the proximal end side. The guided polarizing plates 33 can be sequentially peeled off by the peeling member 5, and the polarizing plates 33 can be further sequentially peeled off from the laminate 30.
Therefore, the polarizing plate 33 can be easily peeled off from the substrate 31.
Further, according to the peeling apparatus 1 configured as described above, it is preferable that the peeling member 5 is a winding member 5 of the type: the one end 33b of the polarizing plate 33 peeled from the laminate 30 and bent by the peeling auxiliary member 7 can be wound up while the polarizing plate 33 is further peeled by rotating the winding frame, and the polarizing plate 33 is sequentially wound up.
With this configuration, as described above, the polarizing plate 33 that has been peeled off can be bent along the distal edge 7ba of the distal end portion 7b, and the polarizing plate 33 can be guided to the proximal end side. The guided polarizing plates 33 can be sequentially wound up by the winding member 5, and the polarizing plates 33 can be further sequentially peeled from the laminate 30.
Therefore, the polarizing plate 33 can be easily peeled off from the substrate 31.
The peeling method of the present embodiment includes: a holding step of peeling one end 33b of the polarizing plate 33 from a laminate 30 including a substrate 31 and the polarizing plate 33 bonded to one surface of the substrate 31 and holding the one end 33b by a peeling member 5; and a peeling step of guiding the polarizing plate 33 to the peeling member 5 by bending the polarizing plate 33 being peeled by the peeling auxiliary member 7 along the distal edge 7ba of the peeling auxiliary member 7, and further peeling the polarizing plate 33 in sequence by the peeling member 5 to peel the polarizing plate 33 from the laminate 30, wherein the peeling auxiliary member 7 includes: a bottom surface portion 7a disposed along a surface 33a of the laminate 30 on the polarizing plate 33 side; and the tip portion 7b having a curved surface (tip edge) 7ba for bending the polarizing plate 33 being peeled along the curved surface (tip edge) 7 ba.
according to the peeling method having the above configuration, it is preferable that the peeling auxiliary member 7 further includes: and an inclined portion 7c inclined from the distal end portion 7b toward the proximal end side and away from the bottom surface portion 7a, wherein the peeling auxiliary member 7 further guides the polarizing plate 33 guided along the distal end edge 7ba to the peeling member 5 along the inclined portion 7 c.
According to the peeling method of the above-described structure, it is preferable that the winding member 5 is used as the peeling member 5,
In the holding step, one end 33b of the polarizing plate 33 is peeled off and the one end 33b is wound around the winding member 5, and in the peeling step, the polarizing plate 33 is further peeled off sequentially by the winding member 5 and the polarizing plate 33 is wound up, thereby peeling the polarizing plate 33 from the laminate 30.
As described above, according to the present embodiment, it is possible to provide the peeling auxiliary member 7, the peeling apparatus 1, and the peeling method that can easily peel the polarizing plate 33 from the substrate 31.
Next, the present invention will be described in further detail by way of examples.
Examples
Production of polarizing plate A
Preparation of polarizer A'
A long polyvinyl alcohol (PVA) film having an average polymerization degree of 2700 and a thickness of 75 μm was stretched in the longitudinal direction between rolls having different peripheral speeds, and the film was conveyed to the downstream side while being stretched in the following manner.
Specifically, first, a polyvinyl alcohol film was immersed in a water bath at 30 ℃ for 1 minute to swell it, and the film was stretched 1.2 times in the conveying direction based on the length of the film before swelling (original length). Next, the polyvinyl alcohol film after swelling and stretching was immersed in an aqueous solution of 0.03 wt% potassium iodide and 0.3 wt% iodine at 30 ℃ for 1 minute to be dyed, and the film was stretched 3.0 times in the conveying direction based on the above original length. Subsequently, the film was immersed in an aqueous solution at 60 ℃ containing boric acid at a concentration of 4% by weight and potassium iodide at a concentration of 5% by weight for 30 seconds, and the film was stretched 6.0 times in the conveying direction based on the above original length. The stretched film thus obtained was dried at 70 ℃ for 2 minutes, thereby obtaining a polarizing plate A' having a thickness of 30 μm.
Production of protective film
First, a (meth) acrylic resin pellet having a lactone ring structure obtained by subjecting a copolymer of methyl 2- (hydroxymethyl) acrylate (MHMA) and Methyl Methacrylate (MMA) to cyclized condensation is obtained.
specifically, 5 parts by weight of methyl 2- (hydroxymethyl) acrylate, 20 parts by weight of methyl methacrylate, and 25 parts by weight of toluene were charged into a 30-liter reaction vessel equipped with a stirrer, a temperature sensor, a condenser, a nitrogen introduction tube, and a dropping pump, and the temperature was raised to 100 ℃ while introducing nitrogen. Then, 0.075 part by weight of t-butyl peroxyisopropyl carbonate as an initiator was added, and at the same time, a solution containing 5 parts by weight of MHMA, 20 parts by weight of MMA, 25 parts by weight of toluene, and 0.075 part by weight of the initiator was added dropwise over a period of three and a half hours, and solution polymerization was carried out at 100 ℃ to 110 ℃, followed by aging over a period of one and a half hours. The polymerization reaction rate was 91.8%, and the ratio of MHMA units in the polymer was 20.0%. Further, the weight average molecular weight of the polymer was 130000.
The obtained polymer solution was introduced into a vented twin-screw extruder (Φ 29.75mm, L/D30) having a cylinder temperature of 250 ℃, a rotational speed of 100rpm, and a degree of vacuum of 10mmHg to 300mmHg and having 1 rear vent and 4 front vents at a processing speed of 0.7 kg/hr in terms of the amount of resin, subjected to dealcoholization reaction and devolatilization in the extruder, and then extruded to obtain transparent pellets. The weight average molecular weight of the obtained particles was 80000. The glass transition temperature of the pellets was 126 ℃. The residual volatile components in the pellets were as follows.
Methyl methacrylate: 470ppm of the total amount of the catalyst,
Methyl 2- (hydroxymethyl) acrylate: the concentration of the nitrogen-containing gas is 50ppm,
Methanol: the concentration of the mixed solution is 280ppm,
Toluene: 90ppm of
After the obtained particles were dissolved in a methyl ethyl ketone solution, a protective film formed of an acrylic resin was produced by a solution casting method.
Bonding of polarizing plate A' and protective film
The protective films obtained in the above manner were attached to both sides of the polarizer a' obtained in the above manner via an adhesive, and heated in an oven maintained at 60 ℃ for 5 minutes, thereby obtaining a polarizing plate a having a thickness of 144 μm.
production of polarizing plate B
Preparation of polarizer B'
An amorphous polyethylene terephthalate film (trade name: ノ バ ク リ ア, thickness: 100 μm, manufactured by Mitsubishi chemical corporation) in a longitudinal form was used as a resin substrate.
One surface of the resin substrate was subjected to corona treatment (treatment condition: 55 W.min/m 2), and an aqueous solution containing 90 parts by weight of polyvinyl alcohol (polymerization degree: 4200, saponification degree: 99.2 mol%) and 10 parts by weight of acetoacetyl-modified polyvinyl alcohol (trade name "ゴ ー セ フ ァ イ マ ー (registered trademark) Z200", polymerization degree: 1200, acetoacetyl-modification degree: 4.6%, saponification degree: 99.0 mol% or more, manufactured by Nippon synthetic chemical industries, Ltd.) was applied to the corona-treated surface at 60 ℃ and dried to form a polyvinyl alcohol-based resin layer having a thickness of 10 μm, and a resin laminate was obtained.
The obtained resin laminate was mounted on rolls having different peripheral speeds from each other in an oven at 120 ℃ and stretched unidirectionally by 1.8 times at the free end in the longitudinal direction between the rolls.
Next, the stretched resin laminate was immersed in an insolubilization bath (an aqueous boric acid solution prepared by adding 4 parts by weight of boric acid to 100 parts by weight of water) having a liquid temperature of 30 ℃ for 30 seconds (insolubilization treatment).
Next, the resin laminate after the insolubilization treatment was immersed in a dyeing bath (an aqueous iodine solution prepared by adding 0.2 parts by weight of iodic acid and 1.0 part by weight of potassium iodide to 100 parts by weight of water) at a liquid temperature of 30 ℃ for 60 seconds (dyeing treatment).
Subsequently, the resultant was immersed in a crosslinking bath (an iodine-boric acid aqueous solution prepared by mixing 3 parts by weight of potassium iodide and 3 parts by weight of boric acid in 100 parts by weight of water) at a liquid temperature of 30 ℃ for 30 seconds (crosslinking treatment).
Thereafter, the resin laminate subjected to the crosslinking treatment was immersed in an iodine-boric acid aqueous solution (an aqueous solution prepared by mixing 4 parts by weight of boric acid and 5 parts by weight of potassium iodide in 100 parts by weight of water) having a liquid temperature of 70 ℃. In this stretching process, the resin laminate was stretched 6.0 times before breaking (stretching ratio with respect to the length of the resin laminate before stretching 1.8 times under the above-mentioned 120 ℃.
Then, the stretched resin laminate was immersed in a cleaning bath (an aqueous iodine solution prepared by adding 4 parts by weight of potassium iodide to 100 parts by weight of water) having a liquid temperature of 30 ℃ (cleaning treatment), to obtain a resin laminate obtained by laminating a polarizing plate B' on a resin substrate.
Bonding of polarizing plate B' and protective film
An optical film laminate having a polarizing plate B ' with a thickness of 5 μm was produced by applying a polyvinyl alcohol resin aqueous solution (trade name "ゴ ー セ フ ァ イ マ ー (registered trademark) Z-200", resin concentration: 3 wt%, manufactured by japan synthetic chemical industries) as an adhesive to the surface of the polarizing plate B ' of a resin laminate obtained by laminating a polarizing plate B ' on a resin substrate, bonding the resin laminate and the protective film with the aqueous solution, and heating the laminate in an oven maintained at 60 ℃ for 5 minutes.
Then, the resin substrate was peeled off from the optical film laminate obtained just before, thereby obtaining a polarizing plate B having a thickness of 76 μm.
examples 1 to 5
The polarizing plate was peeled from the laminate by the peeling device shown in fig. 1 and 2, and the peeled state of the polarizing plate was examined.
A substrate was prepared by enclosing a liquid crystal material in two pieces of hard glass, and then a polarizing plate was bonded to the substrate with an adhesive, thereby forming a panel having a size of 32 inches, and the panel obtained in this manner was used as a laminate. The polarizing plate a was used as a polarizing plate.
The adhesion strength between the polarizing plate and the substrate in the laminate was 10N. The adhesive strength was measured by Autograph (compact universal tester, Shimadzu corporation).
a specific method of measuring the adhesive strength is as follows. That is, first, a test piece cut into a polarizing plate having a width of 25mm and a length of 100mm was attached to a glass plate with an adhesive, and the obtained laminate was left to stand at 50 ℃ under an atmosphere of 5 atm for 15 minutes. After this placement, one end portion in the longitudinal direction of the test piece stuck on the glass plate was peeled off, and the peeled portion was pinched, and then the portion was pulled at a speed of 300mm/min in a direction (perpendicular direction) 90 ° to the longitudinal direction to be peeled off, and the adhesion force at that time was measured.
In examples 1 to 5, the radius of curvature of the tip portion of the peeling auxiliary member and the angle θ 1 of the inclined portion included in the peeling apparatus were set as shown in table 1. Further, in example 5, a peeling auxiliary member having no inclined portion was used.
A hollow plate-like member made of stainless steel was used as the peeling auxiliary member.
In examples 1 to 4, the winding member was disposed at a position where the polarizing plate between the inclined portion of the peeling auxiliary member and the winding member was parallel to the inclined portion. That is, the winding member is disposed at a position where the peeled polarizing plate can be brought into contact with the inclined portion. On the other hand, in example 5, the winding member was disposed at the following positions: the polarizing plate guided by the tip end portion is inclined obliquely upward toward the winding member so as not to come into contact with the peeling auxiliary member at the downstream of the tip end portion.
The angle of inclination θ 2 of the peeling auxiliary member with respect to the absorption axis direction of the polarizing plate in the laminate (the longitudinal direction of the laminate) was set to 45 °, and the peeling speed (the winding speed of the winding member) was set to 1000 mm/min.
Then, a part of the polarizing plate is peeled off from the laminate, one end of the peeled polarizing plate is wound around a winding member, and the polarizing plate is peeled off by rotating the winding member.
in each of examples 1 to 5, the operation of peeling off the polarizing plate was performed for 10 laminated bodies (n is 10), and the peeling state at that time was determined as follows. The results are shown in Table 1.
Determination criterion
The results of 10 laminates were regarded as excellent in that the polarizing plates were not broken, and expressed as "very good".
The case where the polarizing plate of 1 to 2 laminates of 10 laminates was broken was regarded as good and indicated by ". smallcircle".
The case where the polarizing plates of 3 to 4 laminates of 10 laminates were broken was regarded as a defect and indicated by an "x".
Example 6
In the same manner as in examples 1 to 5, the polarizing plates were peeled from 10 laminated bodies, and the peeled state was examined, except that the polarizing plate B was used as the polarizing plate and the radius of curvature of the tip portion of the peeling auxiliary member provided in the peeling apparatus and the angle θ 1 of the inclined portion were set in accordance with the contents shown in table 1. The results are shown in Table 1.
Comparative examples 1 and 2
In the same manner as in examples 1 to 5, the polarizing plates were peeled from 10 laminated bodies and the peeled state was examined, except that a roll-shaped peeling auxiliary member having a radius of curvature (radius) shown in table 1 was used instead of the plate-shaped peeling auxiliary member. The results are shown in Table 1.
Comparative example 3
Polarizing plates were peeled from 10 laminates in the same manner as in example 6, except that a roll-shaped peeling auxiliary member having a radius of curvature (radius) shown in table 1 was used instead of the plate-shaped peeling auxiliary member, and the peeled state was examined. The results are shown in Table 1.
Example 7
in the same manner as in example 1 except that the peeling apparatus having the peeling member shown in fig. 11 to 13 was used instead of the winding member, the polarizing plates were peeled from each of 10 laminated bodies, and the peeled state was examined. The results are shown in Table 1.
comparative example 4
In the same manner as in comparative example 1 except that the peeling apparatus having a peeling member shown in fig. 11 to 13 was used instead of the winding member, the polarizing plates were peeled from each of 10 laminated bodies, and the peeled state was examined. The results are shown in Table 1.
TABLE 1
As is apparent from the contents shown in table 1, examples 1 to 5 in which the polarizing plate was peeled from the laminate by using the peeling apparatus including the peeling auxiliary member of the present invention are less likely to break at the time of peeling than comparative examples 1 and 2 in which the roller-shaped peeling auxiliary member was used. Further, even when the polarizing plate B was used in place of the polarizing plate a, it was found that the polarizing plate was less likely to be broken during peeling in example 6 in which the polarizing plate was peeled from the laminate by using the peeling apparatus including the peeling auxiliary member of the present invention, as compared with comparative example 3 in which a roll-shaped peeling auxiliary member was used. It is also understood that even when the peeling device shown in fig. 11 to 13 is used in place of the peeling device shown in fig. 1 and 2 to peel the polarizing plate from the laminate, the polarizing plate is less likely to be broken during peeling in example 7 in which the peeling device having the peeling auxiliary member of the present invention is used, as compared with comparative example 4 in which the peeling auxiliary member in a roll form is used.
Further, it is understood from the results of examples 1, 3 to 5 that, in examples 1 and 4 in which the angle of the inclined portion is in the range of 10 ° to 30 °, the polarizing plate is less likely to be broken at the time of peeling, as compared with examples 3 and 5 in which the angle of the inclined portion is out of the range of 10 ° to 30 °. In example 5 in which the peeling auxiliary member having no inclined portion was used, the polarizing plate located between the peeling auxiliary member and the winding member was not supported by the inclined portion, and therefore the angle formed between the polarizing plate and the distal end portion of the peeling auxiliary member was changed by vibration of the polarizing plate or the like, and the balance of the tension was broken in the width direction (extending direction of the distal end portion) by the change in the angle, and as a result, the polarizing plate was broken.
On the other hand, in comparative examples 1 and 3, the gaps between the roll-shaped peeling auxiliary member and the peeled polarizing plate were larger than those in examples 1 to 6 and comparative example 2, and therefore the peeling start points were not uniform in the width direction. That is, the tension applied to the polarizing plate varies in the width direction of the peeling auxiliary member. As a result, the polarizing plate is broken.
In comparative example 2, the peeling auxiliary member was deformed, and as a result, the peeling start points were not uniform in the width direction. That is, the tension applied to the polarizing plate varies in the width direction of the peeling auxiliary member. As a result, the polarizing plate is broken.
The peeling apparatus and the peeling method according to the present embodiment are as described above, but the present invention is not limited to the above-described embodiments, and design changes can be appropriately made within the intended scope of the present invention.
For example, the above embodiment shows the following modes: the winding member 5, the peeling auxiliary member 7, the 1 st supporting member 9, and the 2 nd supporting member 11 are fixed at predetermined positions so as not to be relatively movable with respect to the table member 3. With this configuration, the polarizing plate 33 can be peeled from the laminate 30 without using a moving mechanism or the like for moving the above-described members.
However, in addition to this, in the present invention, the winding member 5, the peeling auxiliary member 7, the 1 st supporting member 9, and the 2 nd supporting member 11 may be configured to be movable relative to the table member 3. In this case, the following form may be adopted: the stacked body 30 on the table member 3 is fixed to the table member 3, and then the winding member 5, the peeling auxiliary member 7, the 1 st supporting member 9, and the 2 nd supporting member 11 are moved by a conventionally known moving mechanism.
In the above embodiment, the embodiment has been described in which the laminate 30 having the substrate 31, the pressure-sensitive adhesive layer 35, and the polarizing plate 33 is peeled, but the laminate to which the present invention is applicable may be in the following form: in addition to the substrate 31, the adhesive layer 35, and the polarizing plate 33, other films may be further laminated on the polarizing plate 33.
In the above embodiment, the form in which the winding member 5 is used as the peeling member 5 is shown, but the peeling member 5 is not particularly limited to the winding member in the present invention. For example, the peeling member 5 may have the structure shown in fig. 11 to 13 instead of the winding member 5. The peeling member 5 is constituted by: the one end 33b of the polarizing plate 33 that has been peeled off is held by being sandwiched between the one end 33b, and the peeling member 5 is moved in the peeling direction X, thereby further peeling off the polarizing plate 33. Specifically, the peeling apparatus 1 having the peeling member 5 can be configured as follows: the peeling member 5 includes a support portion 5a that is movable in the peeling direction X of the polarizing plate 33, and a holding portion 5b that is supported by the support portion 5a and is capable of holding one end portion 33b of the peeled polarizing plate 33, and the peeling member 5 includes a driving member such as a servo motor or a linear motor for moving the support portion 5a in the peeling direction X, and the one end portion 33b of the polarizing plate 33 is held by holding the one end portion 33b by holding the one end portion 5b, and the driving member moves the support portion 5a in this state to peel the polarizing plate 33 (see fig. 13).
Description of the reference numerals
1. A peeling device; 3. a table member; 5. a peeling member; 7. a peeling auxiliary member; 7a, a bottom surface portion; 7b, a tip end portion; 7ba, curved surface (top edge); 9. 1 st support member; 11. a 2 nd support member; 30. a laminate; 31. a substrate; 31a, one face of the substrate; 33. a polarizing plate; 33a, a surface on the polarizing plate side; 33b, one end portion.
Claims (7)
1. A peeling auxiliary member for peeling a polarizing plate from a laminate having a substrate and the polarizing plate bonded to one surface of the substrate,
The peeling auxiliary member is plate-shaped and includes:
A bottom surface portion arranged along a surface of the laminate on the polarizing plate side;
A tip portion having a curved surface for bending the polarizing plate being peeled along the curved surface; and
An inclined portion that is inclined from the distal end portion toward the proximal end side and away from the bottom surface portion;
The peeling auxiliary member guides the polarizing plate guided along the distal end portion further to the proximal end side along the inclined portion.
2. The peeling assistance member according to claim 1,
The angle formed by the inclined part relative to the plane parallel to the bottom surface part is 10-30 degrees.
3. The peeling assistance member according to claim 1,
The radius of curvature of the tip portion is 2.5mm to 17.5 mm.
4. A peeling device is characterized in that a peeling head is arranged,
the peeling apparatus includes:
the peeling assistance member as claimed in any one of claims 1 to 3; and
And a peeling member for holding one end portion of the polarizing plate peeled from the laminate and bent by the peeling auxiliary member, and further sequentially peeling the polarizing plate.
5. The peeling apparatus as claimed in claim 4,
The peeling member is a winding member that: the method can be used for sequentially winding the polarizing plates while further peeling the polarizing plates by rotating one end of the polarizing plates peeled from the laminated body and bent by the peeling auxiliary member.
6. A method of peeling off a substrate, characterized in that,
The peeling method comprises the following steps:
A holding step of peeling one end portion of the polarizing plate from a laminate including a substrate and a polarizing plate bonded to one surface of the substrate and holding the one end portion with a peeling member; and
A peeling step in which a plate-shaped peeling auxiliary member is used, the peeling auxiliary member including: a bottom surface portion arranged along a surface of the laminate on the polarizing plate side; a tip portion having a curved surface for bending the polarizing plate being peeled along the curved surface; and an inclined portion that is inclined from the distal end portion toward a base end side and away from the bottom surface portion, wherein the peeling auxiliary member guides the polarizing plate guided along the distal end portion further toward the base end side along the inclined portion, and wherein in the peeling step, the polarizing plate being peeled is guided to the peeling member while being bent along the distal end portion and further guided along the inclined portion toward the base end side by the peeling auxiliary member, and the polarizing plate is further peeled sequentially by the peeling member, thereby peeling the polarizing plate from the laminate.
7. The peeling method according to claim 6,
A take-up member is used as the peeling member described above,
In the holding step, one end of the polarizing plate is peeled off and wound on the winding member,
In the peeling step, the polarizing plate is wound up by the winding member while the polarizing plate is further sequentially peeled off, thereby peeling the polarizing plate from the laminate.
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| JP2013190685 | 2013-09-13 | ||
| JP2013-190685 | 2013-09-13 | ||
| JP2014-056828 | 2014-03-19 | ||
| JP2014056828A JP6258736B2 (en) | 2013-09-13 | 2014-03-19 | Peeling member, peeling device and peeling method |
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| CN104460099A CN104460099A (en) | 2015-03-25 |
| CN104460099B true CN104460099B (en) | 2019-12-10 |
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| CN201420527092.4U Active CN204203585U (en) | 2013-09-13 | 2014-09-12 | Peel off auxiliary part and stripping off device |
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| CN104460099B (en) * | 2013-09-13 | 2019-12-10 | 日东电工株式会社 | Stripping auxiliary member, stripping device and stripping method |
| KR101546068B1 (en) | 2014-08-14 | 2015-08-20 | 주식회사 엘지화학 | Bar for peeling off polarizing film from panel, apparatus and method using the same |
| JP6670683B2 (en) * | 2016-06-07 | 2020-03-25 | 株式会社Ｓｃｒｅｅｎラミナテック | Method and apparatus for separating work composed of carrier substrate and resin layer |
| TWI752871B (en) * | 2021-04-23 | 2022-01-11 | 銘銪工業有限公司 | Attachment device |
| CN113650401A (en) * | 2021-08-17 | 2021-11-16 | 合肥三利谱光电科技有限公司 | Film tearing machine |
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| JPH08292433A (en) * | 1995-02-22 | 1996-11-05 | Sharp Corp | Method and device for peeling tacky adhesive film |
| CN1906510A (en) * | 2004-03-25 | 2007-01-31 | 日东电工株式会社 | Manufacturing method for polarizing plate, polarizing plate and picture display device using the polarizing plate |
| CN102695981A (en) * | 2009-12-25 | 2012-09-26 | 日东电工株式会社 | Method for continuous fabrication of liquid crystal display elements and apparatus therefor |
| JP3181776U (en) * | 2012-12-07 | 2013-02-21 | 富士フイルム株式会社 | Solar cell module manufacturing equipment |
| CN204203585U (en) * | 2013-09-13 | 2015-03-11 | 日东电工株式会社 | Peel off auxiliary part and stripping off device |
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| JPH08292433A (en) * | 1995-02-22 | 1996-11-05 | Sharp Corp | Method and device for peeling tacky adhesive film |
| CN1906510A (en) * | 2004-03-25 | 2007-01-31 | 日东电工株式会社 | Manufacturing method for polarizing plate, polarizing plate and picture display device using the polarizing plate |
| CN102695981A (en) * | 2009-12-25 | 2012-09-26 | 日东电工株式会社 | Method for continuous fabrication of liquid crystal display elements and apparatus therefor |
| JP3181776U (en) * | 2012-12-07 | 2013-02-21 | 富士フイルム株式会社 | Solar cell module manufacturing equipment |
| CN204203585U (en) * | 2013-09-13 | 2015-03-11 | 日东电工株式会社 | Peel off auxiliary part and stripping off device |
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