KR102181272B1 - Peel assisting member, peeling apparatus and peeling method - Google Patents

Abstract

A peeling auxiliary member for forming a peeling starting point when the polarizing plate is peeled from a laminate having a substrate and a polarizing plate adhered on one side of the substrate, and a bottom portion disposed along the surface of the laminate at the polarizing plate side And, a distal end portion having a curved surface for bending and pouring the peeling polarizing plate.

Description

Peeling auxiliary member, peeling device, and peeling method {PEEL ASSISTING MEMBER, PEELING APPARATUS AND PEELING METHOD}

The present invention relates to a peeling auxiliary member, a peeling device, and a peeling method used to peel a polarizing plate from a laminate.

Conventionally, as a panel 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. This panel is a laminate having a substrate formed of a hard glass plate or the like, and a polarizing plate (polarizing film) adhered to one side or both sides of the substrate through an adhesive.

This kind of liquid crystal display panel or the like is manufactured by bonding a polarizing plate to a substrate, and is inspected after manufacturing. In this inspection, problems such as contamination or breakage of the adhered polarizing plate, and mixing of air or foreign matter between the polarizing plate and the substrate may be found. In this case, by peeling the polarizing plate from a liquid crystal display panel or the like, the obtained substrate is reused for manufacture of another liquid crystal display panel or the like. The peeling of the polarizing plate in this way is generally called a rework.

By the way, a peeling device used to peel a polarizing plate from such a laminate has been proposed. For example, a polarizing plate peeling apparatus including a take-up roller covering one end of a polarizing plate peeling off from a substrate of a liquid crystal display panel and a pressing roller (peeling auxiliary member) for pressing the liquid crystal display panel through the polarizing plate has been proposed. According to this peeling device, while the surface on the side of the polarizing plate in the liquid crystal display panel is pressed by a pressing roller, the polarizing plate being peeled is curved along the circumferential surface of the pressing roller, and the curved polarizing plate is applied to the rotating winding roller. It is wound up sequentially by means of. By this winding, the polarizing plate is peeled off again through the pressing roller, and the peeled polarizing plate is wound up sequentially.

As described above, in the peeling device provided with the pressing roller, the winding force of the winding member is converted into a force for peeling the polarizing plate through the pressing roller.

Japanese Patent Publication No. 2009-29561

However, as is generally well known, the polarizing plate adhered to the substrate in the liquid crystal display panel is not originally intended to be peeled off. That is, the polarizing plate is adhered to the substrate with much stronger adhesion than when one film is adhered to another member on the premise that it is originally peeled off.

For this reason, in the case of peeling the polarizing plate using the peeling device, a very high tension is applied to the pressing roller in order to peel the polarizing plate by resisting the strong adhesive force. As a result, there is a fear that the pressing roller is bent, the balance of tension in the longitudinal direction of the pressing roller is broken, and thereby the polarizing plate is torn. When the polarizing plate is torn and a part of the torn part remains on the pressing roller, since it is necessary to separate the remaining polarizing plate, it becomes difficult to peel the polarizing plate by that much.

In addition, when the pressing roller is bent, another new pressing roller must be used, and also in this respect, it is difficult to say that the peeling device can easily peel the polarizing plate.

In view of the above circumstances, it is an object of the present invention to provide a peeling auxiliary member, a peeling apparatus, and a peeling method that enable easy peeling of a polarizing plate from a substrate.

Peeling auxiliary member according to the present invention,

It is a peeling auxiliary member used to peel the polarizing plate from a laminate having a substrate and a polarizing plate adhered on one side of the substrate,

A bottom portion disposed along a surface of the layered body on the polarizing plate side;

It characterized in that it comprises a tip portion having a curved surface for bending the polarizing plate being peeled off.

In the peeling auxiliary member of the above configuration,

It is preferable to further include an inclined portion that is inclined toward the base end side from the front end and spaced apart from the bottom portion.

In the peeling auxiliary member of the above configuration,

It is preferable that the angle of the inclined portion with respect to the surface parallel to the bottom portion is 10 to 30°.

In the peeling auxiliary member of the above configuration,

It is preferable that the radius of curvature of the tip portion is 2.5 to 17.5 mm.

The peeling device according to the present invention,

The peeling auxiliary member,

And a peeling member for sequentially peeling the polarizing plate again while maintaining the one end of the polarizing plate which is peeled off from the laminate and curved by the peeling auxiliary member.

In addition, in the peeling device of the above configuration,

It is preferable that the said peeling member is a take-up member which peels off the said polarizing plate again and rolls up sequentially by rotating one end of the said polarizing plate which peeled from the said laminated body and curved by the said peeling auxiliary member.

The peeling method according to the present invention,

A holding step of peeling one end of the polarizing plate from a laminate having a substrate and a polarizing plate adhered on one side of the substrate to hold the one end by a peeling member;

Using a peeling auxiliary member including a bottom portion disposed along the surface of the polarizing plate side of the laminate and a tip portion having a curved surface to bend and follow the peeling polarizing plate, A peeling step of peeling the polarizing plate from the laminate is provided by sequentially peeling the polarizing plate again using the peeling member while being curved and poured into the peeling member.

In the peeling method of the above configuration,

The peeling auxiliary member further includes an inclined portion that is inclined toward the base end side from the front end portion and spaced apart from the bottom surface portion,

It is preferable to guide the polarizing plate guided along the tip portion to the peeling member again along the inclined portion.

In the peeling method of the above configuration,

Using a winding member as the peeling member,

In the holding step, one end of the polarizing plate is peeled off and over the winding member,

In the said peeling process, it is preferable to peel the said polarizing plate from the said laminated body by winding up while peeling the said polarizing plate again by the said winding member sequentially.

1 is a schematic side view showing a peeling device according to an embodiment of the present invention.
Fig. 2 is a schematic top view showing a peeling device according to the present embodiment.
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 in which a polarizing plate is peeled from a laminate when the radius of curvature of the tip portion of the peeling auxiliary member is relatively large.
Fig. 5 is a schematic side view showing a state in which the polarizing plate is peeled from the laminate when the radius of curvature of the tip portion of the peeling auxiliary member is relatively small.
Fig. 6 is a schematic side view showing a state in which one end of a peeled polarizing plate spans a winding member.
7 is a schematic side view showing a state in which the separated polarizing plate is sequentially wound while the polarizing plate is peeled off again by rotation of the winding member.
Fig. 8 is a schematic side view showing a state in which all of the polarizing plates are peeled off by rotation of the winding member.
9 is a schematic side view showing an example of a layer configuration of a laminate to which the peeling device and the peeling method of the present embodiment are applied.
Fig. 10 is a schematic side view showing an example of a layer configuration of a polarizing plate in the laminate of Fig. 9;
11 is a schematic side view showing a peeling device according to another embodiment of the present invention.
Fig. 12 is a schematic top view showing a peeling device according to the present embodiment.
Fig. 13 is a schematic side view showing a state in which the polarizing plate is peeled again by the peeling member.

Hereinafter, a peeling auxiliary member, a peeling device, and a peeling method according to an embodiment of the present invention will be described.

First, the peeling apparatus provided with the peeling auxiliary member of this embodiment is demonstrated.

1, 2, and 3, the peeling apparatus 1 of this embodiment is adhered on a substrate 31 and one side 31a of the substrate 31 (see FIG. 9). The stage member 3 on which the stacked body 30 having the polarizing plate 33 is mounted, and a bottom surface portion 7a that is plate-shaped and arranged along a surface 33a on the side of the polarizing plate 33 of the stacked body 30 , Peeling auxiliary member 7 including a tip portion 7b having a curved surface (tip edge) 7ba for bending and following the polarizing plate 33 being peeled off, and peeling off from the laminate 30 and assisting peeling A peeling member 5 is provided for holding the one end 33b of the polarizing plate 33 curved by the member 7 and sequentially peeling the polarizing plate 33 again.

More specifically, the peeling device 1 of the present embodiment is a peeling member 5, one end of the polarizing plate 33 that is peeled off from the laminate 30 and curved by the peeling auxiliary member 7 ( 33b) is provided with a take-up member 5 which sequentially winds up while peeling off the polarizing plate 33 again by rotating it.

In addition, the peeling device 1 is disposed between the take-up member 5 and the peeling auxiliary member 7 and presses the stacked body 30 toward the stage member 3 and is pinched together with the stage member 3. It further comprises a 1st supporting member 9 to support. The peeling device 1 is disposed on the opposite side of the winding member 5 (left than the peeling auxiliary member 7 in Fig. 1) with the peeling auxiliary member 7 therebetween, and the polarizing plate 33 is peeled and exposed. A second support member 11 is also provided that presses the formed substrate 31 against the stage member 3 and holds it together with the stage member 3.

Moreover, the peeling device 1 is provided with the member 15 for fixing. By the fixing member 15, the winding member 5, the peeling auxiliary member 7, the first supporting member 9 and the second supporting member 11 are each fixed to the stage member 3, have.

The stage member 3 is a die on which the stacked body 30 is mounted while all the polarizing plates 33 are peeled from the stacked body 30.

The take-up member 5 is to be wound up sequentially while peeling the polarizing plate 33 again by being overlaid with one end 33b of the polarizing plate 33 being peeled off and rotating in this state.

As such a winding member 5, a roller which rotates by being driven by a drive device 17, such as a motor, etc. are mentioned, for example.

Further, to the winding member 5, the one end 33b of the peeled polarizing plate 33 is fixed with an adhesive tape (not shown) or the like.

In addition, FIG. 2 shows a state in which the polarizing plate 33 is peeled off together with the pressure-sensitive adhesive layer 35 (see FIG. 9 ).

As shown in Figs. 2 and 3, the peeling auxiliary member 7 has a long plate shape and has a bottom portion 7a and a tip portion 7b. In addition, in the present embodiment, the peeling auxiliary member 7 is an inclined portion that is inclined from the tip portion 7b toward the base end side (downstream side of the peeling direction X, right side in Fig. 3) and spaced apart from the bottom surface portion 7a. It has more (7c).

Such a peeling auxiliary member 7 has a length (maximum length) in a direction from the front end side toward the base end side (peeling direction X) than the height (maximum height) H from the bottom surface (the surface of the bottom surface portion 7a) L side is formed large.

The ratio of the length L to the length H (H:L) is preferably 1:3 to 1:5.

Further, the height H is preferably 15 to 20 mm, and the length L is preferably 50 to 75 mm.

The bottom part 7a is arranged along the surface 33a on the side of the polarizing plate 33 in the laminate 30. Specifically, when the polarizing plate 33 is peeled off by using the peeling auxiliary member 7, the bottom portion 7a is in contact with the laminate 30 to suppress the rise of the laminate 30. It is placed. The arrangement of the bottom surface portion 7a is not particularly limited as long as the bottom surface portion 7a comes into contact with the stacked body 30 to suppress the rise of the stacked body 30 during the peeling. For example, even if the bottom surface portion 7a is disposed in contact with the surface 33a on the side of the polarizing plate 33 before the start of peeling using the peeling auxiliary member 30, it is in the vicinity of the surface 33a. It may be arranged in a non-contact manner with the surface 33a.

The distal end portion 7b is positioned upstream of the take-up member 5 (left side in Fig. 1) in the peeling direction X (direction from the distal end side of the peeling auxiliary member 7 toward the base end side). By this arrangement, the polarizing plate 33 being peeled is curved along the tip edge 7ba of the tip portion 7b, and guided to the base end side (downstream side of the peeling direction X) of the peeling auxiliary member 7. That is, the peeled polarizing plate 33 is guided toward the winding member 5.

The radius of curvature R of the tip edge 7ba of the tip portion 7b is not particularly limited and may be appropriately set.

Here, as described above, since the adhesion of the polarizing plate 33 to the substrate 31 is very high, in the vicinity of the peeling starting point S, the peeled polarizing plate 33 has a tip portion 7b (the tip edge 7ba). )) It becomes difficult to follow. In addition, as shown in Fig. 4, as the radius of curvature R of the tip portion 7b is relatively large, the gap between the peeled polarizing plate 33 and the tip portion 7b tends to increase. That is, it becomes easy to locate the peeling starting point S at a place farther from the contact part M of the distal end 7b and the laminated body 30 (upstream side, left side of FIG. 4).

On the other hand, as shown in FIG. 5, as the radius of curvature R of the tip portion 7b is relatively small, the gap between the peeled polarizing plate 33 and the tip portion 7b tends to decrease. That is, the peeling starting point S becomes easy to be located near the contact portion M of the distal end portion 7b and the laminate 30 (downstream side, right side of FIG. 5 ).

And, as the gap between the peeled polarizing plate 33 and the tip portion 7b increases, the peeling force of the polarizing plate 33 converted through the tip portion 7b increases in the longitudinal direction of the peeling auxiliary member 7 (peeling direction X In the direction perpendicular to the). Further, the substrate 31 becomes fragile.

Further, according to common technical knowledge, when the radius of curvature R is too small, the tip portion 7b becomes too sharp and the polarizing plate 33 is easily cut.

Therefore, for example, in consideration of the above viewpoint, the radius of curvature R of the tip edge 7ba of the tip portion 7b can be appropriately set, and the radius of curvature R is preferably 2.5 to 17.5 mm.

When the radius of curvature R of the tip portion 7b is 17.5 mm or less, the peeling starting point S of the polarizing plate 33 can be made close to the contact portion M between the laminate 30 and the bottom surface portion 7a. As a result, since the force to peel the polarizing plate 33 transmitted through the tip portion 7b is less likely to fluctuate in the extending direction of the tip portion 7b (the direction perpendicular to the peeling direction X), the polarizing plate 33 It can be made more difficult to tear. In addition, cracking of the substrate 31 can be further suppressed.

In addition, when the radius of curvature R of the tip portion 7b is 2.5 mm or more, it is possible to suppress the tip edge 7ba from becoming too sharp and make the polarizing plate 33 difficult to be cut.

Therefore, it becomes possible to peel the polarizing plate 33 more easily from the substrate 31.

The inclined portion 7c guides the polarizing plate 33 guided by the tip portion 7b to the base end side (downstream side of the peeling direction X) of the peeling auxiliary member 7 again.

When the peeling auxiliary member 7 has the inclined portion 7c, the peeled polarizing plate 33 can be guided by the tip portion 7b and then again guided by the inclined portion 7c. That is, the path of the polarizing plate (separated polarizing plate) 33 passing through the tip portion 7b can be maintained at a predetermined angle θ1 by the inclined portion 7c. Thereby, since the variation in the angle θ1 of the peeled polarizing plate 33 can be suppressed, the variation in the tension applied to the tip portion 7b caused by this angle θ1 can be suppressed.

In this way, since the balance of the tension applied to the peeling auxiliary member 7 is more suppressed, it becomes possible to more easily peel the polarizing plate 33 from the substrate 31.

It is preferable that the angle θ1 of the inclined portion 7c with respect to the plane T parallel to the laminate 30 is 10 to 30°.

As described above, since the angle θ1 of the inclined portion 7c is 10 to 30°, the peeling auxiliary member 7 is pressed against the laminated plate 30 by the peeled polarizing plate 33, while the polarizing plate 33 is pressed at the base end. It becomes possible to guide to the side.

Therefore, it becomes possible to make the peeling auxiliary member 7 more stable and to peel the polarizing plate 33 more easily 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 steel, chromium molybdenum steel, manganese steel, and other alloys and ceramic materials. Further, the peeling auxiliary member 7 may be hollow or solid.

It is preferable that the release treatment is performed on the tip edge 7ba of the tip portion 7b so that the peeled polarizing plate 33 slides easily on its surface. Examples of the release treatment include surface treatment such as saturated polyester coating and bi-coat treatment on the tip portion 7ba, or attaching a conductive tape to the tip portion 7ba, whereby the tip portion ( 7ba) can be made slippery.

The 1st support member 9 is arrange|positioned between the winding member 5 and the peeling auxiliary member 7, The laminated body 30 is pressed toward the stage member 3, and together with the stage member 3 It is to support through cooperation. When the polarizing plate 33 is peeled off by the winding of the winding member 5 by this first support member 9, the stacked body 30 (and the exposed substrate 31) is removed from the stage member 3 Since floating is suppressed, the polarizing plate 33 is more likely to be peeled off.

As such a 1st support member 9, a rubber roller is mentioned, for example.

The second support member 11 is disposed on the opposite side of the take-up member 5 with the peeling auxiliary member 7 interposed therebetween, and the substrate 31 exposed by the polarizing plate 33 is peeled off the stage member 3 It is pressed against and held together with the stage member 3 to support it. When the polarizing plate 33 is peeled off by the winding of the winding member 5 by this second supporting member 11, the exposed substrate 31 (and further, the laminate 30 together with this) is a stage member (3) It is suppressed from floating. Thereby, the polarizing plate 33 becomes more likely to be peeled off.

As such 2nd support member 11, a rubber roller is mentioned, for example.

The fixing member 15 is a predetermined position in the peeling direction X (length direction of the stage member 3) and a predetermined position (height) in a direction perpendicular to the stage member 3 (top surface of) In this, the winding member 5, the peeling auxiliary member 7, the first supporting member 9 and the second supporting member 11 are fixed to the stage member 3.

In this embodiment, as described above, the winding member 5, the peeling auxiliary member 7, the first supporting member 9, and the second supporting member 11 are each staged by the fixing member 15. It is fixed to a predetermined position of the member 3. That is, from the start of peeling of the polarizing plate 33 from the laminate 30 by the take-up member 5 to the end of peeling (all polarizing plates 33 will be peeled off), the take-up member 5, the peeling auxiliary member (7), the 1st support member 9 and the 2nd support member 11 are designed so as not to move relatively in the peeling direction X with respect to the stage member 3.

Next, the peeling method of the present embodiment will be described while explaining the peeling operation of the polarizing plate by the peeling device 1.

The peeling method of the present embodiment carried out using the peeling device 1,

The one end (33b) of the polarizing plate (33) is peeled off from the laminate (30) having the substrate (31) and the polarizing plate (33) adhered on one side (31a) of the substrate (31). The holding process of holding 33b) by the peeling member 5, the bottom surface part 7a arrange|positioned along the surface 33a of the polarizing plate 33 side of the laminated body 30, and the polarizing plate 33 being peeled off By using a plate-shaped peeling auxiliary member 7 including a tip portion 7b having a curved surface (tip edge) 7ba for bending and following, the polarizing plate 33 being peeled off was placed at the tip edge of the tip portion 7b. The polarizing plate 33 is peeled from the laminate 30 by sequentially peeling off the polarizing plate 33 again using the peeling member 5 while being curved along (7ba) and guiding the peeling member 5 to the peeling member 5 It is equipped with a peeling process to do.

More specifically, in this embodiment, the winding member 5 is used as the peeling member 5, and as the holding step, the one end 33b of the polarizing plate 33 is peeled off to the winding member 5 The polarizing plate 33 is peeled from the laminated body 30 by performing a straddling process and winding up sequentially while peeling the polarizing plate 33 again using the winding member 5 in the said peeling process.

In the above-described straddling step, peeling of the one end 33b of the polarizing plate 33 from the laminate 30 is performed, for example, as follows. That is, the operator holds a peeling knife (not shown) having a blade at the tip of the body, and inserts the peeling knife between the substrate 31 and the polarizing plate 33 of the stacked body 30, so that the polarizing plate 33 To peel off a part of it. More specifically, the peeling knife is inserted between the pressure-sensitive adhesive layer 35 and the substrate 31 in the laminate 30 to peel the polarizing plate 33 together with the pressure-sensitive adhesive layer 35 (Fig. 1). , See FIGS. 6 and 9).

Further, the one end 33b of the peeled polarizing plate 33 is spread over the winding member 5, for example, as follows. That is, it is performed by spreading the one end 33b of the peeled polarizing plate 33 over the circumferential surface of the winding member 5 and fixing it to the circumferential surface with an adhesive tape (not shown) or the like.

In the above-described peeling process, the peeling auxiliary member 7 is used to guide the peeled polarizing plate 33 to the winding member 5 while being curved along the tip edge 7ba of the tip portion 7b, while the winding member 5 Using, while peeling the polarizing plate 33 again, the peeled polarizing plate 33 is sequentially wound up.

More specifically, the peeling auxiliary member 7 is used, the rise of the laminate 30 is suppressed, and the peeled polarizing plate 33 is curved along the tip edge 7ba of the tip portion 7b, while a winding member ( While guiding to 5), the peeled polarizing plate 33 is sequentially wound up while peeling the polarizing plate 33 again using the winding member 5.

At this time, the 1st support member 9 presses the laminated body 30 toward the stage member 3, and is pinched together with the stage member 3, and supports it. Further, the second support member 11 presses the exposed substrate 31 from which the polarizing plate 33 is peeled toward the stage member 3, and is held together with the stage member 3 to support the substrate 31.

In addition, here, with respect to the absorption axis direction Y of the polarizing plate 33 in the laminated body 30 (refer to the broken line arrow in FIG. 2), the peeling auxiliary member 7 is arrange|positioned at an angle θ2 inclined. The closer the peeling auxiliary member 7 is parallel to the absorption axis direction Y (angle θ2 = 0°), and the closer it is vertical (angle θ2 = 90°), the more the polarizing plate 33 is torn during peeling. It becomes easy to lose. Therefore, taking this viewpoint into consideration, the angle θ2 is preferably 40 to 50°. In addition, in FIG. 2, the absorption axis direction Y of the polarizing plate 33 is parallel with the longitudinal direction of the laminated body 30, and the peeling auxiliary member 7 is arrange|positioned at an angle θ2=45°.

And, from the state shown in Fig. 6, when sequentially winding the polarizing plate 33 while peeling off again by the winding member 5, as the peeling of the polarizing plate 33 progresses, as shown in Figs. 7 and 8 As described above, the stacked body 30 is sequentially moved to the side opposite to the peeling direction X (refer to the white arrow). That is, the stacked body 30 moves relatively to the stage member 3. More specifically, the laminated body 30 slides on the stage 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 laminate 30 stops moving.

As shown in FIG. 9, the peeling apparatus 1 of the polarizing plate of this embodiment and the laminated body 30 to which the peeling method is applied are on the substrate 31 and one side 31a of the substrate 31. A pressure-sensitive adhesive layer 35 formed on and a polarizing plate 33 laminated on the pressure-sensitive adhesive layer 35 are provided.

As the substrate 31, a liquid crystal display panel, an organic EL display panel, and the like are exemplified.

In addition, as shown in FIG. 10, in this embodiment, the polarizing plate 33 is specifically, the polarizer 41, the adhesive layer 43 formed respectively on both surfaces of the polarizer 41, and these adhesive layers Each of the protective films 45 laminated on 43 is provided.

In addition, as described above, in this embodiment, the polarizing plate 33 has a protective film 45 laminated on both sides of the polarizer 41, but in addition, in the present invention, the polarizing plate 33, A form having a protective film 45 laminated on one side of the polarizer 41 may be employed.

The thickness of the polarizing plate 33 is not particularly limited. However, for example, as the thickness of the polarizing plate 33 decreases, the strength decreases and tends to be easily torn. On the other hand, as the thickness increases, the strength increases and thus tends to become difficult to tear. Therefore, for example, taking this viewpoint into consideration, 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 way, when the thickness is 200 µm or less, the peeling device 1 and the peeling method of the present embodiment can be preferably applied. As described above, even when the thickness is relatively small, the balance of the tension applied to the polarizing plate 33 can be suppressed from being broken, and the polarizing plate 33 can be made difficult to tear at the time of peeling.

In addition, the material of the polarizing plate 33 is not particularly limited. However, as described later, when the material of the polarizing plate 33, in particular, the protective film 45 is easily torn, the peeling device 1 and the peeling method of the present embodiment can be preferably applied. have.

Examples of the polarizer 41 include those formed by dyeing and stretching a polyvinyl alcohol-based film.

The thickness of the polarizer 41 is about 2 to 30 μm.

As a material for forming the adhesive layer 43, a conventionally known adhesive may be mentioned.

As the protective film 45, a cellulose resin such as triacetyl cellulose, polyester resin, polyethersulfone resin, polysulfone resin, polycarbonate resin, polyamide resin, polyimide resin, polyolefin resin, (meth)acrylic resin , A cyclic polyolefin resin (norbornene resin), a polyarylate resin, a polystyrene resin, a polyvinyl alcohol resin, and a film formed of a mixture thereof.

Among these, since the protective film formed of a (meth)acrylic resin has relatively low strength and is easily torn, the peeling device 1 and the peeling method of the present embodiment can be preferably applied to such a protective film.

The (meth)acrylic means at least one of methacrylic and acrylic.

As such a (meth)acrylic resin, Tg (glass transition temperature) is preferably 115°C or higher, more preferably 120°C or higher, still more preferably 125°C or higher, and particularly preferably 130°C or higher. When the Tg is 115° C. or higher, the polarizing plate 33 can be excellent in durability. The upper limit of the Tg of the (meth)acrylic resin is not particularly limited, but from the viewpoint of moldability and the like, it is preferably 170°C or less. From the (meth)acrylic resin, a film having substantially zero in-plane retardation (Re) and thickness direction retardation (Rth) can be obtained.

Examples of (meth)acrylic resins include poly(meth)acrylic acid esters such as polymethyl methacrylate, methyl methacrylate-(meth)acrylic acid copolymerization, methyl methacrylate-(meth)acrylic acid ester copolymer, and methacrylic acid. Acid methyl-acrylic acid ester-(meth)acrylic acid copolymer, methyl (meth)acrylate-styrene copolymer (MS resin, etc.), polymer having an alicyclic hydrocarbon group (e.g., methyl methacrylate-cyclohexyl methacrylate copolymer Coalescence, methyl methacrylate-(meth)acrylate norbornyl copolymer, etc.) are mentioned. Preferably, poly(meth)acrylate C1-6 alkyl, such as poly(meth)acrylate methyl, is mentioned. More preferably, a methyl methacrylate resin containing methyl methacrylate as the main component (50 to 100% by weight, preferably 70 to 100% by weight) is used.

As a specific example of the (meth)acrylic resin, for example, (meth) having a ring structure in a molecule described in Mitsubishi Rayon Co., Ltd. Acripet VH, Acripet VRL20A, and Japanese Patent Laid-Open No. 2004-70296 Acrylic resins, and high Tg (meth)acrylic resins obtained by intramolecular crosslinking or intramolecular cyclization reactions.

As the (meth)acrylic resin, a (meth)acrylic resin having a lactone ring structure can also be used. This is because it has high heat resistance, high transparency, and high mechanical strength by biaxial stretching.

As (meth)acrylic resins having a lactone ring structure, Japanese Patent Laid-Open No. 2000-230016, Japanese Patent Laid-Open No. 2001-51814, Japanese Patent Laid-Open No. 2002-120326, and Japanese Patent Laid-Open No. 2002-254544 A (meth)acrylic resin having a lactone ring structure described in Japanese Patent Application Laid-Open No. 2005-146084 and the like can be mentioned.

The (meth)acrylic resin having a lactone ring structure preferably has a ring-like structure represented by the following formula (Chemical Formula 1).

In the formula, R ¹ , R ² and R ³ each independently represent a hydrogen atom or an organic residue having 1 to 20 carbon atoms. In addition, the organic residue may contain an oxygen atom.

The content ratio of the lactone ring structure represented by the formula (Chemical 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, even more preferably It is preferably 10 to 60% by weight, particularly preferably 10 to 50% by weight. When the content ratio of the lactone ring structure represented by the general formula (Chemical Formula 1) in the structure of the (meth)acrylic resin having a lactone ring structure is less than 5% by weight, there is a fear that heat resistance, solvent resistance, and surface hardness may become insufficient. When the content ratio of the lactone ring structure represented by the general formula (Chemical Formula 1) in the structure of the (meth)acrylic resin having a lactone ring structure is more than 90% by weight, molding processability may be insufficient.

The (meth)acrylic resin having a lactone ring structure has a weight average molecular weight (sometimes referred to as a weight average molecular weight) is preferably 1000 to 2000000, more preferably 5000 to 1000000, still more preferably 10000 to 500000, It is particularly preferably 50000 to 500000. If the weight average molecular weight is out of the above range, molding processability may be insufficient.

The (meth)acrylic resin having a lactone ring structure has a Tg of preferably 115°C or higher, more preferably 120°C or higher, still more preferably 125°C or higher, and particularly preferably 130°C or higher. Since Tg is 115°C or higher, the durability of the polarizing plate 33 containing this is excellent. The upper limit of Tg of the (meth)acrylic resin having the lactone ring structure is not particularly limited, but from the viewpoint of moldability and the like, it is preferably 170°C or less.

The (meth)acrylic resin having a lactone ring structure is, the higher the total light transmittance, as measured by the method according to ASTM-D-1003, of the molded article obtained by injection molding, the higher the more preferable, preferably 85% or more, It is more preferably 88% or more, and still more preferably 90% or more. The total light transmittance is a criterion of transparency, and if the total light transmittance is less than 85%, the transparency may decrease.

The thickness of the protective film 45 as described above is usually about 20 to 60 μm.

In this embodiment, the adhesive force of the polarizing plate 33 to the substrate 31 is usually 5 to 15 N. With this adhesive force, the polarizing plate 33 can be relatively firmly bonded to the substrate 31. Further, even when the polarizing plate 33 firmly bonded in this way is peeled off, the above-described deformation (bending) of the peeling auxiliary member 7 is suppressed. Therefore, the peeling apparatus 1 and peeling method of this embodiment are suitable for the laminated body 30 which has the adhesive force of the said range.

Such adhesive force is a value measured by an autograph (precision universal testing machine, manufactured by Shimadzu Corporation).

As described above, the peeling auxiliary member 7 according to the present embodiment,

A peeling auxiliary member 7 used to peel the polarizing plate 33 from the laminate 30 having a substrate 31 and a polarizing plate 33 adhered on one side 31a of the substrate 31 Is,

A bottom portion 7a disposed along a surface 33a on the side of the polarizing plate 33 of the stacked body 30,

A tip portion 7b having a curved surface (tip edge) 7ba for bending and following the peeling polarizing plate 33 is provided.

According to this configuration, when peeling the polarizing plate 33 from the substrate 31 using the peeling auxiliary member 7, the polarizing plate 33 is peeled through the tip portion 7b and the bottom portion 7a. , Since the peeled polarizing plate 33 can be curved along the tip edge 7ba of the tip portion 7b and guided to the base end side, it is possible to guide the polarizing plate 33 to the base end side while suppressing tearing.

In addition, since the peeling auxiliary member 7 has a bottom portion 7a, the tension applied to the tip portion 7b when peeling is dispersed in the remaining portion (the portion at the base end portion), so that the above tension is compared to that of the roller shape. Thereby, bending of the peeling auxiliary member 7 is suppressed. Thereby, since the balance of the tension applied to the peeling auxiliary member 7 is suppressed from collapsing, problems such as tearing of the polarizing plate 33 caused by the collapse of this balance are suppressed.

Further, since the peeling auxiliary member 7 is difficult to bend as described above, it is relatively excellent in durability.

In addition, since the peeling auxiliary member 7 is excellent in durability as described above, the radius of curvature R of the tip portion 7b can be made relatively small compared to that of the roller-shaped one, thereby adding to the peeling auxiliary member 7 Collapse of the balance of the losing tension is suppressed, and breakage of the substrate 31 is suppressed.

Therefore, it becomes possible to easily peel the polarizing plate 33 from the substrate.

In the separation auxiliary member 7 of the above configuration,

It is preferable to further include an inclined portion 7c that is inclined from the tip portion 7b toward the base portion side and spaced apart from the bottom portion 7a.

According to this configuration, by having the inclined portion 7c, the separated polarizing plate 33 can be guided by the tip portion 7b and then guided by the inclined portion 7c to the base portion side. That is, the path of the peeled polarizing plate 33 passing through the tip portion 7b can be maintained at a predetermined angle θ1 by the inclined portion 7c. Thereby, since the variation of the angle θ1 of the peeled polarizing plate 33 can be suppressed, the variation in the tension applied to the tip portion 7b caused by this variation can be suppressed.

Therefore, since the balance of the tension applied to the peeling auxiliary member 7 is more suppressed, it becomes possible to peel the polarizing plate 33 more easily from the substrate 31.

In the separation auxiliary member 7 of the above configuration,

It is preferable that the angle θ1 of the inclined portion 7c with respect to the plane T parallel to the bottom portion 7a is 10 to 30°.

According to this configuration, since the angle θ1 of the inclined portion 7c is 10 to 30°, the peeling auxiliary member 7 is pressed against the laminate 30 by the peeled polarizing plate 33, while the polarizing plate ( 33) can be guided toward the proximal end.

Therefore, it becomes possible to make the peeling auxiliary member 7 more stable and to peel the polarizing plate 33 more easily from the substrate 31.

In the separation auxiliary member 7 of the above configuration,

It is preferable that the radius of curvature R of the tip portion 7b is 2.5 to 17.5 mm.

According to this configuration, since the radius of curvature R of the distal end portion 7b is 17.5 mm or less, the peeling starting point S of the polarizing plate 33 is brought into contact with the laminate 30 and the bottom surface portion 7a of the peeling auxiliary member 7. You can get close to part M. As a result, since the force to peel the polarizing plate 33 transmitted through the distal end portion 7b is less likely to fluctuate in the extension direction (orthogonal to the peeling direction) of the distal end portion 7b of the peeling auxiliary member 7 , The polarizing plate 33 can be made more difficult to tear. In addition, cracking of the substrate 31 can be further suppressed. In addition, when the radius of curvature R of the tip portion 7b is 2.5 mm or more, it is possible to suppress the tip edge 7ba from becoming too sharp and make the polarizing plate 33 difficult to be cut.

Therefore, it becomes possible to peel the polarizing plate 33 more easily from the substrate 31.

The peeling device 1 according to the present embodiment,

The peeling auxiliary member 7 and

A peeling member that peels off the polarizing plate 33 sequentially again while maintaining the one end 33b of the polarizing plate 33 that is peeled off from the stacked body 30 and curved by the peeling auxiliary member 7 ( 5).

According to this configuration, as described above, the separated polarizing plate 33 can be curved along the tip edge 7ba of the tip portion 7b and guided toward the base end. Further, the guided polarizing plate 33 may be sequentially peeled off by the peeling member 5, and the polarizing plate 33 may be sequentially peeled off from the laminate 30 again.

Therefore, it becomes possible to easily peel the polarizing plate 33 from the substrate 31.

In addition, in the peeling device 1 of the above configuration,

The peeling member 5 is peeled off from the stacked body 30 and the one end 33b of the polarizing plate 33 curved by the peeling auxiliary member 7 is strung and rotated to thereby the polarizing plate 33 It is preferable that it is the winding member 5 which wound up sequentially while peeling again.

According to this configuration, as described above, the separated polarizing plate 33 can be curved along the tip edge 7ba of the tip portion 7b and guided toward the base end. Then, while the guided polarizing plate 33 is sequentially wound by the winding member 5, the polarizing plate 33 can be sequentially peeled off from the laminate 30 again.

Therefore, it becomes possible to easily peel the polarizing plate 33 from the substrate 31.

The peeling method according to this embodiment,

The one end 33b of the polarizing plate 33 is peeled off from the laminate 30 having the substrate 31 and the polarizing plate 33 adhered on one side of the substrate 31. A holding step of holding by the peeling member 5,

A bottom portion 7a disposed along a surface 33a on the side of the polarizing plate 33 of the laminate 30, and a curved surface (tip edge) 7ba for bending and following the peeling polarizing plate 33 Using the peeling auxiliary member 7 including a tip portion 7b having a, the polarizing plate 33 being peeled off is guided to the peeling member 5 while being curved along the tip edge 7ba, while the peeling A peeling step of peeling the polarizing plate 33 from the laminate 30 is provided by sequentially peeling the polarizing plate 33 again using the member 5.

In the peeling method of the above configuration,

The peeling auxiliary member 7 further includes an inclined portion 7c that is inclined toward the base end side from the front end portion 7b and spaced apart from the bottom surface portion 7a,

It is preferable to guide the polarizing plate 33 guided along the tip edge 7ba to the peeling member 5 along the inclined portion 7c.

In the peeling method of the above configuration,

As the peeling member 5, a winding member 5 is used,

In the holding step, the one end 33b of the polarizing plate 33 is peeled off and over the winding member 5,

In the peeling step, it is preferable to peel the polarizing plate 33 from the laminated body 30 by winding the polarizing plate 33 by sequentially peeling off the polarizing plate 33 again by the winding member 5.

As described above, according to the present embodiment, the peeling auxiliary member 7, the peeling device 1, and the peeling method that enable the polarizing plate 33 to be easily peeled from the substrate 31 are provided.

Next, the present invention will be described in more detail while showing examples.

[Example]

(Manufacture of polarizing plate A)

ㆍManufacture of polarizer A

An elongated polyvinyl alcohol (PVA) film having an average degree of polymerization of 2700 and a thickness of 75 µm was conveyed to the downstream side while straddling rollers having different circumferential velocities and stretching in the longitudinal direction between these rollers while performing the following operation.

Specifically, first, the polyvinyl alcohol film was swelled by immersing it in a water bath at 30° C. for 1 minute, and stretched 1.2 times in the conveying direction based on the film length (original length) before swelling. Subsequently, while dyeing the swollen and stretched polyvinyl alcohol film by immersing for 1 minute in an aqueous solution at 30° C. containing 0.03 wt% potassium iodide and 0.3 wt% iodine, based on the original length, It stretched 3.0 times in the conveyance direction. Subsequently, while being immersed for 30 seconds in an aqueous solution at 60° C. containing 4% by weight of boric acid and 5% by weight of potassium iodide, it was stretched 6.0 times in the conveying direction based on the original length. The stretched film thus obtained was dried at 70° C. for 2 minutes to obtain a 30 μm-thick polarizer A.

ㆍProduction of protective film

First, a (meth)acrylic resin pellet having a lactone ring structure obtained by cyclization condensation of a copolymer of 2-(hydroxymethyl)methyl acrylate (MHMA) and methyl methacrylate (MMA) was obtained.

Specifically, a 30 L reaction kiln equipped with a stirring device, a temperature sensor, a cooling tube, a nitrogen introduction tube and a dropping pump, 5 parts of 2-(hydroxymethyl)methyl acrylate, 20 parts of methyl methacrylate, toluene 25 parts of the was added, and the temperature was raised to 100°C while passing through nitrogen. And, while adding 0.075 parts of tert-butylperoxyisopropyl carbonate as an initiator, a solution containing 5 parts of MHMA, 20 parts of MMA, 25 parts of toluene, and 0.075 parts of the initiator was added over 3 hours and a half. Solution polymerization was performed at 100 to 110° C. while dropping, and aging was performed again over an hour and a half. The reaction rate of polymerization was 91.8%, and the ratio of MHMA units in the polymer was 20.0%. Moreover, the weight average molecular weight of this polymer was 130,000.

The obtained polymer solution was subjected to a barrel temperature of 250°C, a rotational speed of 100 rpm, a reduced pressure of 10 to 300 mmHg, and a vent-type screw twin-screw extruder (Φ=29.75 mm, L/D having one rear vent and four pore vents). =30) was introduced at a processing rate of 0.7 kg/hour in terms of the amount of resin, and dealcohol reaction and devolatilization were performed in the extruder and extruded to obtain a transparent pellet. The weight average molecular weight of the obtained pellet was 80000. Further, the glass transition temperature of the pellets was 126°C. In addition, the residual volatile content in the said pellet was set to the value shown below.

Methyl methacrylate: 470 ppm,

2-(hydroxymethyl) methyl acrylate: 50 ppm,

Methanol: 280 ppm,

Toluene: 90ppm

After dissolving the obtained pellet in a methyl ethyl ketone solution, a protective film formed of an acrylic resin was produced by a solution casting method.

ㆍJoining polarizer A and protective film

The protective film obtained above was bonded to both surfaces of the polarizer A obtained above through an adhesive, and heated in an oven maintained at 60° C. for 5 minutes to obtain a polarizing plate A having a thickness of 144 μm.

(Manufacture of polarizing plate B)

ㆍManufacture of polarizer B

As the resin substrate, an elongated amorphous polyethylene terephthalate film (brand name "Nova Clear", thickness: 100 µm, manufactured by Mitsubishi Chemical Corporation) was used.

One side of the resin substrate was subjected to corona treatment (treatment condition: 55 W·min/m 2 ), and on this corona treated side, 90 parts by weight of polyvinyl alcohol (polymerization degree: 4200, saponification degree: 99.2 mol%), and 10 parts by weight of acetacetyl-modified polyvinyl alcohol (trade name "Go Sefimer (registered trademark) Z200", polymerization degree: 1200, acetacetyl modification degree: 4.6%, saponification degree: 99.0 mol% or more, manufactured by Nippon Kosei Chemical Co., Ltd.) A resin laminate was produced by applying and drying the containing aqueous solution at 60°C to form a polyvinyl alcohol-based resin layer having a thickness of 10 μm.

The obtained resin laminate was uniaxially stretched at a free end by 1.8 times in a lengthwise direction between rollers having different circumferential speeds in an oven at 120°C.

Subsequently, the stretched resin laminate was immersed for 30 seconds in an insolubilization bath at a liquid temperature of 30°C (a boric acid aqueous solution obtained by blending 4 parts by weight of boric acid with respect to 100 parts by weight of water) for 30 seconds (insolubilization treatment).

Subsequently, the resin laminate subjected to the insolubilization treatment was added to a dyeing bath at a liquid temperature of 30°C (an aqueous iodine solution obtained by mixing 0.2 parts by weight of iodic acid and 1.0 parts by weight of potassium iodide based on 100 parts by weight of water). It was immersed for 60 seconds (dyeing treatment).

Subsequently, it was immersed for 30 seconds in a crosslinking bath at a liquid temperature of 30°C (an iodine-boric acid aqueous solution obtained by mixing 3 parts by weight of potassium iodide and 3 parts by weight of boric acid) for 100 parts by weight of water (crosslinking treatment).

Thereafter, while immersing the resin laminate subjected to the crosslinking treatment in an aqueous solution of iodine-boric acid at a liquid temperature of 70° C. (an aqueous solution obtained by mixing 4 parts by weight of boric acid and 5 parts by weight of potassium iodide) at a liquid temperature of 70°C. And rollers having different circumferential speeds, and uniaxially stretched in the longitudinal direction between these rollers. In this stretching, the resin laminate was stretched up to 6.0 times, just before fracture (the stretch ratio with respect to the length of the resin laminate before stretching at 120°C to 1.8 times).

Thereafter, the stretched resin laminate was immersed in a washing bath at a liquid temperature of 30°C (an iodine aqueous solution obtained by mixing 4 parts by weight of potassium iodide with respect to 100 parts by weight of water) (washing treatment), and the polarizer B was laminated on the resin substrate. The resulting resin laminate was obtained.

ㆍJoining polarizer B and protective film

On the surface of the polarizer B in the resin laminate in which the polarizer B is laminated on a resin substrate, a polyvinyl alcohol-based resin aqueous solution (brand name "Gosefamer (registered trademark) Z-200"), resin concentration: 3% by weight, Nippon Kosei Kagaku Kogyo) is applied as an adhesive, and the resin laminate and the protective film are bonded through the aqueous solution, and heated in an oven maintained at 60° C. for 5 minutes to laminate an optical film having a polarizer B having a thickness of 5 μm. The sieve was prepared.

And the 76-micrometer-thick polarizing plate B was obtained by peeling the said resin base material from the obtained optical film laminated body.

(Examples 1 to 5)

The polarizing plate was peeled from the laminate using a peeling device as shown in Figs. 1 and 2, and the peeling state of the polarizing plate at that time was examined.

As a laminate, a substrate formed by encapsulating a liquid crystal material in two hard glasses and a polarizing plate was adhered to the substrate through an adhesive to have a panel size of 32 inches. As a polarizing plate, a polarizing plate A was used.

The adhesive strength of the polarizing plate to the substrate in the laminate was 10 N. In addition, this adhesive strength was measured using an autograph (precision universal testing machine, Shimadzu Corporation make).

The specific measurement of the adhesive strength was performed as follows. That is, first, a test piece of a polarizing plate cut into a width of 25 mm and a length of 100 mm is adhered to a glass plate using an adhesive, and the obtained laminate is allowed to stand for 15 minutes in an environment at 50°C and 5 atm. After standing, the one end in the longitudinal direction of the attached test piece is peeled off, the peeled part is gripped, and the adhesive force when peeled by pulling at a speed of 300 mm/min in a direction of 90° to the longitudinal direction (vertical direction) Was measured.

In Examples 1 to 5, the radius of curvature of the tip portion of the peeling auxiliary member provided in the peeling apparatus and the angle θ1 of the inclined portion were set as shown in Table 1. In addition, in Example 5, a peeling auxiliary member having no inclined portion was used.

As the peeling auxiliary member, a hollow plate made of stainless steel was used.

In addition, in Examples 1 to 4, the take-up member was disposed at a position in which a polarizing plate positioned between the inclined portion of the peeling auxiliary member and the take-up member was parallel to the inclined portion. That is, the winding member was disposed at a position where the peeled polarizing plate contacts the inclined portion. On the other hand, in Example 5, the winding member was disposed in a position facing the winding member in an oblique upward direction so that the polarizing plate guided to the tip portion did not come into contact with the peeling auxiliary member downstream of the tip portion.

In addition, the inclination angle θ2 of the peeling auxiliary member with respect to the absorption axis direction (length direction of the laminate) of the polarizing plate in the laminate was set to 45°, and the peeling speed (winding speed by the take-up member) was set to 1000 mm/min. I did.

And a part of the polarizing plate was peeled off from the laminated body, the one end of the peeled polarizing plate was spread over the winding member, and the polarizing plate was peeled by rotating the winding member.

The peeling of the polarizing plate was performed for each of ten laminates in Examples 1 to 5 (n=10), and the peeling state at that time was determined as follows. Table 1 shows the results.

ㆍJudgment Criteria

Out of ten laminated bodies, the case where the polarizing plate was not torn in the total number of sheets was regarded as excellent, and was expressed as "?".

Of the ten laminates, the case where the polarizing plate was torn in 1 to 2 sheets was regarded as good, and was indicated by "○".

The case where the polarizing plate was torn in 3 to 4 out of 10 laminates was regarded as not good, and indicated by "x".

(Example 6)

10 sheets in the same manner as in Examples 1 to 5 except that a polarizing plate B was used as a polarizing plate, and the radius of curvature of the tip portion of the peeling auxiliary member provided in the peeling device and the angle θ1 of the inclined portion were set as shown in Table 1. Each polarizing plate was peeled from the laminated body of, and the peeling state was investigated. Table 1 shows the results.

(Comparative Examples 1 and 2)

In the same manner as in Examples 1 to 5, 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, each polarizing plate was peeled from the ten laminates. Then, the peeling state was investigated. Table 1 shows the results.

(Comparative Example 3)

In the same manner as in Example 6, except that instead of the plate-shaped peeling auxiliary member, a roll-shaped peeling auxiliary member having a radius of curvature (radius) shown in Table 1 was used, each polarizing plate was peeled from the laminate of ten sheets, The peeling state was investigated. Table 1 shows the results.

(Example 7)

In the same manner as in Example 1 except that a peeling device provided with a peeling member as shown in Figs. 11 to 13 was used instead of the winding member, each polarizing plate was peeled from the laminate of ten sheets, and the peeling state was investigated. I did. Table 1 shows the results.

(Comparative Example 4)

In the same manner as in Comparative Example 1 except that a peeling device provided with a peeling member as shown in Figs. 11 to 13 was used instead of the winding member, each polarizing plate was peeled from the laminate of ten sheets, and the peeling state was investigated. I did. Table 1 shows the results.

As shown in Table 1, Examples 1 to 5 in which the polarizing plate was peeled from the laminate using the peeling apparatus provided with the peeling auxiliary member of the present invention were compared to Comparative Examples 1 and 2 using the roll-shaped peeling auxiliary member. In addition, it was found that the polarizing plate is difficult to tear during peeling. In addition, even in the case of using the polarizing plate B instead of the polarizing plate A, Example 6 in which the polarizing plate was peeled from the laminate using the peeling apparatus provided with the peeling auxiliary member of the present invention was a comparative example using a roll-shaped peeling auxiliary member. From 3, it was found that the polarizing plate is less likely to be torn during peeling. In addition, even in the case of using the peeling apparatus of FIGS. 11 to 13 instead of the peeling apparatus of FIGS. 1 and 2, the seventh embodiment in which the polarizing plate was peeled from the laminate by using the peeling apparatus provided with the peeling auxiliary member of the present invention It was found that the polarizing plate is less likely to be torn during peeling than in Comparative Example 4 using the roll-shaped peeling auxiliary member.

In addition, as a result of Examples 1 and 3 to 5, than Examples 3 and 5 in which the angle of the slope exceeds the range of 10 to 30°, Examples 1 and 4 in the range of 10 to 30° were It was found that the polarizing plate was difficult to tear. In addition, in Example 5 using the peeling auxiliary member having no inclined portion, the polarizing plate positioned between the peeling auxiliary member and the winding member is not supported by the inclined portion, and therefore, due to vibration of the polarizing plate, the tip of the peeling auxiliary member The angle of the polarizing plate with respect to is fluctuated, and the balance of the tension collapsed in the width direction (extending direction of the tip portion) due to the fluctuation of the angle, resulting in tearing of the polarizing plate.

On the other hand, in Comparative Examples 1 and 3, since the gap between the roll-shaped peeling auxiliary member and the peeled polarizing plate was larger than in Examples 1 to 6 and Comparative Example 2, the peeling starting point did not coincide in the width direction. That is, in the width direction of the peeling auxiliary member, fluctuations occurred in the tension applied to the polarizing plate. As a result, the polarizing plate was torn.

In addition, in Comparative Example 2, the peeling auxiliary member was deformed, and as a result, the peeling starting point did not match in the width direction. That is, in the width direction of the peeling auxiliary member, fluctuations occurred in the tension applied to the polarizing plate. As a result, the polarizing plate was torn.

The peeling device and the peeling method of the present embodiment are the same as described above, but the present invention is not limited to the above embodiment, and the design can be appropriately changed within the intended range of the present invention.

For example, in the above embodiment, the winding member 5, the peeling auxiliary member 7, the first supporting member 9 and the second supporting member 11 do not move relative to the stage member 3. In order not to be able to do so, each fixed shape was shown at a predetermined position. With this configuration, the polarizing plate 33 can be peeled from the laminate 30 without employing a moving mechanism or the like for moving the respective members.

However, in addition, in the present invention, the winding member 5, the peeling auxiliary member 7, the first supporting member 9 and the second supporting member 11 are moved relative to the stage member 3 It is also possible to adopt a configuration that can be used. In this case, the stacked body 30 on the stage member 3 is fixed to the stage member 3, and the winding member 5, the peeling auxiliary member 7, the first support member 9 and the second support A form in which the member 11 is moved by a conventionally known moving mechanism may be adopted.

Further, in the above embodiment, the laminate 30 having the substrate 31, the pressure-sensitive adhesive layer 35, and the polarizing plate 33 is shown, but the laminate to which the present invention is applied is the substrate 31 , In addition to the pressure-sensitive adhesive layer 35 and the polarizing plate 33, a form having another film further laminated on the polarizing plate 33 may be employed.

In addition, in the above-described embodiment, the form in which the take-up member 5 is used as the release member 5 is shown, but in the present invention, the release member 5 is not particularly limited to the take-up member. For example, as the peeling member 5, instead of the winding member 5, one having a configuration as shown in Figs. 11 to 13 may be employed. The said peeling member 5 is comprised so that the polarizing plate 33 may be peeled again by moving toward the peeling direction X, sandwiching the one end 33b of the peeled polarizing plate 33 and holding it. Specifically, as the peeling device 1 provided with such a peeling member 5, the peeling member 5 is a support portion 5a movable toward the peeling direction X of the polarizing plate 33, and the support portion 5a A driving member such as a servo motor or a linear motor that moves the support part 5a toward the peeling direction X is provided, while being supported by, has a holding part 5b capable of holding the one end 33b of the peeled polarizing plate 33 And holding the one end 33b of the polarizing plate 33 between the holding portions 5b, and in this state, the driving member moves the supporting portion 5a to peel the polarizing plate 33 ( See Fig. 13) configuration.

1: peeling device
3: absence of stage
5: peeling member
7: peeling auxiliary member
7a: bottom part
7b: tip
7ba: curved surface (edge border)
9: first support member
11: second support member
30: laminate
31: substrate
31a: one side
33: polarizer
33a: surface on the polarizing plate side
33b: one end

Claims (9)

It is a peeling auxiliary member used to peel the polarizing plate from a laminate having a substrate and a polarizing plate adhered on one side of the substrate,
It's a plate,
A bottom portion disposed along a surface of the layered body on the polarizing plate side;
A tip portion having a curved surface to bend and follow the polarizing plate being peeled off,
It has an inclined portion that is inclined toward the base end side from the front end and spaced apart from the bottom portion,
A peeling auxiliary member, characterized in that guiding the polarizing plate guided along the distal end portion toward the base end portion along the inclined portion. The peeling auxiliary member according to claim 1, wherein an angle of the inclined portion with respect to a surface parallel to the bottom portion is 10 to 30°. The peeling auxiliary member according to claim 1, wherein a radius of curvature of the tip portion is 2.5 to 17.5 mm. The peeling auxiliary member according to any one of claims 1 to 3, and
A peeling device comprising a peeling member for sequentially peeling the polarizing plate again while maintaining one end of the polarizing plate which is peeled off from the laminate and curved by the peeling auxiliary member. The peeling device according to claim 4, wherein the peeling member is a take-up member that is peeled off from the laminate and is rotated with one end of the polarizing plate bent by the peeling auxiliary member, thereby sequentially winding the polarizing plate while peeling it again. A holding step of peeling one end of the polarizing plate from a laminate having a substrate and a polarizing plate adhered on one side of the substrate to hold the one end by a peeling member;
A bottom portion disposed along the surface of the polarizing plate side of the laminate, a tip portion having a curved surface for bending and following the peeling polarizing plate, and inclined to be spaced apart from the bottom portion toward the base portion side from the tip portion Using a plate-shaped peeling auxiliary member that includes an inclined portion and guides the polarizing plate guided along the tip portion toward the base end portion along the inclined portion again, the polarizing plate being peeled off is bent and followed by the tip portion, and the inclined portion A peeling method comprising a peeling step of peeling the polarizing plate from the laminate by sequentially peeling the polarizing plate again using the peeling member while guiding along a portion toward the base end portion and guiding the peeling member. The method according to claim 6, wherein a winding member is used as the peeling member,
In the holding step, one end of the polarizing plate is peeled off and over the winding member,
In the peeling step, the polarizing plate is peeled off from the laminate by winding up the polarizing plate while sequentially peeling off the polarizing plate again by the winding member. delete delete

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