KR20190002952U - Peeling apparatus and blade for peeling - Google Patents

Abstract

(Problem) Provision of the peeling apparatus which can peel a bonded material and an adhesion layer from a transparent substrate smoothly.
(Solution means) A peeling device for peeling a bonded object bonded to a transparent substrate via an adhesive layer from the transparent substrate, the support being for flatly supporting the transparent substrate, and inserted between the transparent substrate and the adhesive layer. And a blade for peeling the adhesive and the adhesive layer from the transparent substrate, wherein the blade has a coating layer covering at least the surface of the blade body and the surface of the blade body in contact with the adhesive layer. Peeling device.

Description

Peeling device and blade for peeling {PEELING APPARATUS AND BLADE FOR PEELING}

This invention relates to the peeling apparatus and the peeling blade.

The patent document 1 discloses the peeling apparatus which isolate | separates the display module by which the cover glass is adhere | attached to a display panel with an adhesive material by a cover glass and a display panel. This peeling apparatus has a metal plate which cut | disconnects an adhesive material in parallel with the main surface of a display panel. The thickness of a metal plate is thinner than the thickness of an adhesive material, and an adhesive material is cut | disconnected in the thickness direction center.

Japanese Unexamined Patent Publication No. 2016-38436

Conventionally, although the peeling apparatus for peeling the bonded object bonded together on the transparent substrate through the adhesion layer from the said transparent substrate is examined, the apparatus which can peel more smoothly was desired.

This invention is made | formed in view of the said subject, Comprising: It aims at providing the peeling apparatus which can peel a bonded material and an adhesion layer from a transparent substrate smoothly.

According to one aspect of the present invention,

As a peeling apparatus which peels the bonded thing bonded together on the transparent substrate through the adhesion layer from the said transparent substrate,

A support for flatly supporting the transparent substrate;

A blade inserted between the transparent substrate and the adhesive layer, the blade separating the adhesive and the adhesive layer from the transparent substrate,

The peeling apparatus is provided in which the said blade has a coating body which covers the blade body and the surface which contacts at least the said adhesion layer among the surfaces of the said blade main body.

According to one aspect of the present invention, there is provided a peeling apparatus capable of smoothly peeling a paste and an adhesive layer from a transparent substrate.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which looked at the peeling apparatus which concerns on one Embodiment from the Z direction.
It is a figure which looked at the peeling apparatus which concerns on one Embodiment from the Y direction.
3 is a diagram illustrating a peeling operation of a peeling apparatus according to one embodiment.
4 is a diagram illustrating a peeling operation of a peeling apparatus subsequent to FIG. 3.
5 is a cross-sectional view of a blade according to one embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated with reference to drawings. In each figure, the same or corresponding code | symbol is attached | subjected to the same or corresponding structure, and description is abbreviate | omitted. In each drawing, the X, Y and Z directions are directions perpendicular to each other. X direction and Y direction are directions parallel to the support surface 111 which supports the transparent substrate 30 of the support body 110 flatly. The Z direction is a direction perpendicular to the support surface 111.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which looked at the peeling apparatus which concerns on one Embodiment from the Z direction. It is a figure which looked at the peeling apparatus which concerns on one Embodiment from the Y direction. The peeling apparatus 100 peels the display apparatus 10 and the adhesion layer 20 as a bonded material from the transparent substrate 30. The display device 10 is bonded to the bonding surface 31 of the transparent substrate 30 via the adhesion layer 20 beforehand. Hereinafter, the bonding surface 31 of the transparent substrate 30 is also called the back surface 31, and the surface on the opposite side to the bonding surface 31 of the transparent substrate 30 is also called the front surface 32. As shown in FIG. Moreover, the display apparatus 10 side (Z direction positive side) is also called back based on the transparent substrate 30, and the opposite side (Z direction negative side) to the display apparatus 10 is front. Also called. In addition, although the bonding material of this embodiment is the display apparatus 10, the kind of bonding material is not specifically limited.

The display device 10 is a liquid crystal display, for example. The liquid crystal display has a liquid crystal panel and a backlight. The image can be displayed by illuminating the liquid crystal panel from the back of the liquid crystal panel and controlling the transmittance of light passing through the liquid crystal panel for each pixel.

The liquid crystal panel has, for example, an array substrate, a liquid crystal layer, and a color filter substrate in this order. The array substrate has a switching element such as a TFT and a transparent pixel electrode on the liquid crystal layer side. The color filter substrate has a color filter and a transparent counter electrode on the liquid crystal layer side.

The liquid crystal panel has a first polarizing plate formed on the side opposite to the liquid crystal layer of the array substrate and a second polarizing plate formed on the side opposite to the liquid crystal layer of the color filter substrate. The polarization axis of the first polarizing plate and the polarization axis of the second polarizing plate intersect at 90 degrees, for example.

The backlight illuminates the liquid crystal panel from the rear. The backlight may be either an edge light type or a direct type. The backlight may have various optical films in addition to a light emitting element. An optical film makes uniform the intensity | strength of light, changes a viewing angle, or improves the utilization efficiency of light.

In addition, the display device 10 may include a touch sensor. The touch sensor detects contact or proximity of an object such as a finger to the transparent substrate 30. The display device 10 may have a frame, a case, etc. which support a liquid crystal panel and a backlight. In addition, the display apparatus 10 is not limited to a liquid crystal display, For example, an organic electroluminescent display, a plasma display, etc. may be sufficient.

The adhesive layer 20 bonds the display device 10 to the transparent substrate 30. As a material of the adhesion layer 20, what is known in the field of the display apparatus 10 etc. may be used. The adhesion layer 20 consists of hardened | cured material of curable resin composition typically. The adhesion layer 20 may be a single layer structure or a multilayered structure. In the case of a multilayer structure, the structure which laminated | stacked the same material may be sufficient, and the structure which laminated | stacked different materials may be sufficient. When the adhesion layer 20 is a multilayered structure, the number of layers which comprise the adhesion layer 20 should just be 2 or more layers.

It is preferable that it is 5 * 10 <^2> Pa or more, and, as for the storage shear modulus G 'of the adhesion layer 20 in frequency 1 Hz, 25 degreeC, it is more preferable if it is 1 * 10 <^3> Pa or more. Since G 'is 5 * 10 <^2> Pa or more, since the adhesion layer 20 has sufficient hardness, the blade 150 mentioned later does not tear the adhesion layer 20, but the adhesion layer 20 and the transparent substrate 30 Can break in between). In addition, the blade 150 can stably advance the peeling interface. On the other hand, it is preferable that G 'is 1 * 10 <^7> Pa or less, and 1 * 10 <^6> Pa or less is more preferable. When G 'is 1 × 10 ⁷ Pa or less, the interface between the display device 10 and the adhesive layer 20 or the transparent substrate 30 and the adhesive layer at the time of bonding the display device 10 to the transparent substrate 30 ( 20 Even if bubbles are generated at the interface or the like, the bubbles are likely to disappear in a short time. Moreover, since the adhesion layer 20 is soft to some extent, the blade 150 can be easily penetrated between the adhesion layer 20 and the transparent substrate 30, and the peeling origin can be expanded easily. In addition, even when the tensile elongation of the adhesion layer 20 is large and peels the transparent substrate 30 from the adhesion layer 20, and pulls and peels the adhesion layer 20 from the display apparatus 10, The adhesion layer 20 does not cut easily on the way, and the whole adhesion layer 20 can be peeled at once.

0.03 mm or more is preferable, as for the thickness of the adhesion layer 20, 0.2 mm or more and 2.0 mm or less are more preferable, 0.3 mm or more and 1.5 mm or less are further more preferable. When the thickness of the adhesion layer 20 is 0.03 mm or more, excessive deformation | transformation of the display apparatus 10 by the invasion of the blade 150 can be suppressed, and it is preferable. Moreover, after peeling the transparent substrate 30 from the adhesion layer 20, when pulling out and peeling the adhesion layer 20 from the display apparatus 10, the adhesion layer 20 does not cut well in the middle of peeling. On the other hand, if the thickness of the adhesion layer 20 is 2.0 mm or less, the display apparatus 10 can be suitably deformed in a peeling process, and the blade 150 does not tear the adhesion layer 20, but the adhesion layer ( It can easily penetrate between 20) and the transparent substrate 30, and can easily enlarge a peeling origin.

The adhesion layer 20 is obtained by hardening | curing a photocurable resin composition, a thermosetting resin composition, a light, a thermosetting resin composition, etc., for example. These curable resin compositions may be cured in advance and may be inserted between the display device 10 and the transparent substrate 30 in the form of a sheet.

"Photocurable resin composition" means the resin composition which can be hardened by exposure. "Thermosetting resin composition" means the resin composition which can be hardened by heating. "Light and thermosetting resin composition" means the resin composition which can be hardened by exposure and heating. "Exposure" means irradiating light, such as an ultraviolet-ray.

As a curable composition, since it can harden | cure at low temperature and a hardening rate is fast, a photocurable resin composition is preferable.

Since the photocurable resin composition does not need to perform heating for removing a solvent, it is preferable that it is a non-solvent type. A "solvent-free type" means that it does not contain a solvent or the content rate of a solvent is 5 mass% or less in the gross mass (100 mass%) of a photocurable resin composition. A "solvent" means a liquid (volatile diluent) whose boiling point is 150 degrees C or less.

It is most preferable that a photocurable resin composition does not contain a solvent at the point which can skip a drying process and can save time and energy.

The curable composition typically contains a curable compound (A) having a curable group and a photopolymerization initiator (B). As needed, non-curable components other than a photoinitiator (B) may contain. As a nonhardening component, a nonhardening polymer (C), another additive, etc. are mentioned.

As curable compound (A), compounds, such as an acryl type, silicone type, a urethane acrylate type, and an epoxy type, are mentioned. Especially, since it is easy to adjust the storage shear elastic modulus G 'of the adhesion layer 20 to the range of 5 * 10 <^2> Pa or more and 1 * 10 <^7> Pa, the curable compound (A) is preferably a silicone or urethane acrylate type. Do.

The transparent substrate 30 is used as a cover glass of the display device 10, for example. The cover glass protects the display device 10. The thickness of the transparent substrate 30 may be thicker than the thickness of the display device 10. For this reason, the transparent substrate 30 does not deform as well as the display device 10.

A functional layer such as a low reflection layer or an antifouling layer may be formed on the front surface 32 of the transparent substrate 30. Only one of the low reflection layer and the antifouling layer may be formed, or both may be formed. In the latter case, the low reflection layer and the antifouling layer are formed in this order on the front surface 32 of the transparent substrate 30.

The low reflection layer suppresses reflection of external light. The low reflection layer has a structure in which a plurality of layers having different refractive indices are stacked, for example. The anti-glare property which prevents the glare of external light can be improved, and the visibility of the image displayed by the display apparatus 10 can be improved.

The antifouling layer is for suppressing adhesion of contaminants. When the display device 10 is a touch panel, it is possible to prevent adhesion of fingerprints and the like. The antifouling layer is formed of a fluorine-containing organosilicon compound or the like. The fluorine-containing organosilicon compound has antifouling property, water repellency, oil repellency and the like.

Moreover, the uneven surface which diffusely reflects external light, such as sunlight or illumination light, may be formed in the front surface 32 of the transparent substrate 30. As shown in FIG. The anti-glare property which prevents the glare of external light can be improved, and the visibility of the image displayed by the display apparatus 10 can be improved. The uneven surface is formed by an etching process or the like. A low reflection layer or an antifouling layer may be formed on this uneven surface.

On the other hand, the light shielding layer which hides the wiring etc. of the display apparatus 10 from the front may be formed in the back surface 31 of the transparent substrate 30. FIG. When viewed from the front, the light shielding layer is formed in a frame shape, and its inner circumferential edge is formed so as to overlap with the outer circumferential edge of the image display area for displaying an image of the display device 10. In addition, a metal layer functioning as a mirror may be formed on the back surface 31 of the transparent substrate 30.

The transparent substrate 30 may be formed of inorganic glass, such as soda-lime glass, aluminosilicate glass, aluminoborosilicate glass, an alkali free glass, for example. Inorganic glass may be tempered glass from the viewpoint of strength improvement. The tempered glass may be either chemically tempered glass or physically tempered glass.

The chemically strengthened glass is formed of a glass containing an alkali metal, specifically, soda-lime glass, aluminosilicate glass, or the like. The chemically strengthened glass is formed by forming a compressive stress layer on the glass surface by replacing alkali metal ions having a small ion radius (for example, Na ions) with alkali metal ions having a large ion radius (for example, K ions). will be.

In addition, the transparent substrate 30 may be formed with organic glass, such as a polycarbonate resin and an acrylic resin. Moreover, the laminated board in which the some glass plate was bonded may be sufficient as the transparent substrate 30. FIG.

The peeling apparatus 100 peels the display apparatus 10 and the adhesion layer 20 as a bonded material from the transparent substrate 30. Since the residue of the adhesion layer 20 hardly adheres to the transparent substrate 30 after peeling, removal of a residue is easy. The peeling apparatus 100 has the support body 110, the guide 120, the slider 130, the blade 150, the inclination-angle adjustment mechanism 170, and the heater 180.

The support body 110 has the support surface 111 which supports the transparent substrate 30 flatly. The support 110 may vacuum-adsorb the transparent substrate 30. The adhesive layer 20 and the display device 10 are formed by inserting the blade 150 between the transparent substrate 30 and the adhesive layer 20 while supporting the transparent substrate 30 flatly by the support 110. It can peel from the transparent substrate 30. Since the transparent substrate 30 is flatly supported at the time of peeling, breakage of the transparent substrate 30 can be suppressed.

The guide 120 is fixed with respect to the support 110, and guides the blade 150 in the first direction. The guide 120 is formed in a pair at intervals in a second direction perpendicular to the first direction. Hereinafter, a 1st direction is also called X direction, and a 2nd direction is also called a Y direction. The X direction and the Y direction are directions parallel to the support surface 111.

The slider 130 moves along the guide 120. The slider 130 is formed for every guide 120, and is formed one pair at intervals in the Y direction. The blade 150 is placed on the pair of sliders 130. The blade 150 moves in the X direction (for example, obliquely downward in FIG. 2) together with the pair of sliders 130.

The blade 150 is inserted between the transparent substrate 30 and the adhesive layer 20, and the display device 10 and the adhesive layer 20 are peeled off from the transparent substrate 30. As the blade 150 moves from the one side in the X direction toward the opposite side in the X direction, the adhesive layer 20 is gradually peeled from the transparent substrate 30 toward the side in the X direction opposite to the X direction.

The boundary line between the site | part to which the adhesion layer 20 adhered and the site | part to which the adhesion layer 20 peeled among the bonding surfaces of the transparent substrate 30 is also called a peeling wire. Although the thickness of the blade edge | tip of the blade 150 is thinner than the thickness of the adhesion layer 20, it is not zero. Therefore, the peeling wire is formed ahead of the blade 150 of the blade 150 in the moving direction of the blade 150 (beveled downward in FIG. 2).

The blade 150 has, at the blade edge, a parallel plane 151 parallel to the support surface 111 of the support 110 and in contact with the transparent substrate 30, and an inclined surface 152 inclined with respect to the parallel plane 151. Have The angle which the parallel surface 151 and the inclined surface 152 make when viewed from the Y direction is also called blade edge angle (alpha) (refer FIG. 2). The blade tip angle α is, for example, 1 ° or more and 60 ° or less.

The blade 150 is formed as shown in FIG. 1, for example. The blade 150 includes a base 155 placed over a pair of sliders 130, and a blade blade projecting from the base 155 toward one side in the X direction (in detail, in the moving direction of the blade 150). 156). The blade blade 156 has a parallel surface 151 and an inclined surface 152. It is preferable that the blade edge angle (alpha) of the blade blade part 156 is uniform in the blade blade part 156 whole.

The load which pushes the blade 150 between the adhesive layer 20 and the transparent substrate 30 is also called simply "indentation load." As the indentation load, a driving force such as a motor may be used, but gravity is used in the present embodiment. In this case, in order to adjust the indentation load, you may attach | attach detachably with respect to the blade 150 further. The larger the weight of the sum of the blades 150, the slider 130, and the weight, the greater the indentation load.

The inclination-angle adjustment mechanism 170 (refer FIG. 2) adjusts the inclination angle (beta) with respect to the horizontal plane of the support surface 111 of the support body 110 when viewed from the Y direction. The inclination angle β is 0 ° when the support surface 111 is parallel to the horizontal plane, and the inclination angle β is 90 ° when the support surface 111 is perpendicular to the horizontal plane. When the weight of the sum total of the blade 150, the slider 130, and the weight is the same, the larger the inclination angle (beta), the larger the component force in the X direction of gravity, and the indentation load.

The inclination-angle adjustment mechanism 170 pivotally supports the support body 110 with respect to the base frame 171 and the base frame 171 which are mounted on a horizontal stand, for example. It has a pivot axis 172. The axial direction of the turning shaft 172 becomes the Y direction, and the support body 110 can turn around the turning shaft 172. Inclination angle (beta) can be changed in the range of 0 degrees or more and 90 degrees or less. After the adjustment of the inclination angle β, the support 110 is fixed to the base frame 171 in an irreversible manner.

In addition, when the inclination angle β is 0 °, a driving force such as a motor is used as the indentation load. In this case, the peeling apparatus 100 may have a motion conversion mechanism which converts the rotational motion of the motor into the linear motion of the slider 130. As the motion conversion mechanism, for example, a ball screw is used.

The heater 180 heats the adhesion layer 20 via the transparent substrate 30 supported by the support body 110. Since the adhesion layer 20 softens when heated, it is easy to deform | transform so that the blade 150 pushed in between the adhesion layer 20 and the transparent substrate 30 may be received. Therefore, the blade 150 can be pushed in easily.

The heater 180 is formed between the support 110 and the transparent substrate 30 supported by the support 110 in FIG. 2 and the like, but may be formed inside the support 110. As the heater 180, for example, a silicone rubber heater is used. The temperature of the heater 180 is set in the range of 40 degreeC or more and 230 degrees C or less, for example.

3 is a diagram illustrating a peeling operation of a peeling apparatus according to one embodiment. 4 is a diagram illustrating a peeling operation of a peeling apparatus subsequent to FIG. 3. Hereinafter, with reference to FIG. 3 and FIG. 4, the peeling method using the peeling apparatus 100 of the said structure is demonstrated.

First, as shown in FIG. 3, the transparent substrate 30 is supported by the support body 110 flatly. The display device 10 is disposed on the side opposite to the support 110 based on the transparent substrate 30. After that, the pressure-sensitive adhesive layer 20 is heated to a predetermined temperature via the support 110 using the heater 180.

Next, the shim plate 190 is inserted between the transparent substrate 30 supported by the support 110 and the adhesive layer 20 to form a peeling starting point. The thickness of the shim plate 190 is thinner than the thickness of the blade edge of the blade 150. Therefore, peeling origin can be formed easily.

Next, the blade tip of the blade 150 is inserted at the starting point of peeling. The blade tip of the blade 150 is inserted between the shim plate 190 and the transparent substrate 30. Thereby, the blade edge of the blade 150 can be reliably inserted between the adhesion layer 20 and the transparent substrate 30.

Next, as shown in FIG. 4, the shim plate 190 is separated, and the blade 150 is moved from the one side in the X direction toward the opposite side in the X direction, and the adhesive layer 20 is moved from the one side in the X direction toward the opposite side in the X direction. It peels from the transparent substrate 30 gradually. As a result, the display device 10 and the adhesive layer 20 are peeled from the transparent substrate 30.

By the way, as shown in FIG. 4, the blade 150 contacts the adhesion layer 20 in the inclined surface 152 and the back surface 153 continued from the inclined surface 152. As shown in FIG. The inclined surface 152 and the back surface 153 are in contact with the part peeled from the transparent substrate 30 of the adhesive layer 20.

The blade blade portion 156 may have a parallel surface 151 and an inclined surface 152, and the base 155 may have a rear surface 153. The back surface 153 is parallel to the parallel surface 151. Thereby, excessive deformation of the adhesion layer 20 and the display apparatus 10 at the time of peeling can be suppressed, and deterioration of the display function of the display apparatus 10 by peeling (for example, breakage and nonuniformity of a display color) is carried out. It can be suppressed.

This inventor paid attention to the water contact angle of the surface which contacts the adhesion layer 20 of the blade 150 in order to reduce the frictional resistance of the blade 150 with respect to the adhesion layer 20. The water contact angle is measured in accordance with the static method described in Japanese Industrial Standards (JIS R 3257: 1999). The water contact angle depends on the kind of material, the surface roughness and the like.

It is preferable that the water contact angle of the surface which contacts at least the adhesion layer 20 among the surfaces of the blade 150 is 60 degrees or more. For example, the water contact angle of the inclined surface 152 and the back surface 153 is 60 degrees or more. Thereby, the frictional resistance of the blade 150 with respect to the adhesion layer 20 can be reduced, and a peeling wire can be advanced with a small indentation load. Therefore, the load applied to the display device 10 at the time of peeling can be reduced, and the deterioration of the display function of the display device 10 by peeling can be suppressed. As a result, the peeled display device 10 can be reused, and for example, the peeled display device 10 can be bonded to the transparent substrate 30 again.

In addition, although the water contact angle may be 60 degrees or more in the whole surface of the blade 150, 60 degrees or more may be sufficient in the surface which contacts the adhesion layer 20 among the surfaces of the blade 150, and the adhesion layer 20 It may be less than 60 ° on the surface not in contact with the).

The water contact angle of the surface which contacts at least the adhesion layer 20 among the surfaces of the blade 150 becomes like this. Preferably it is 100 degrees or more, More preferably, it is 120 degrees or more. The larger the water contact angle, the smaller the surface free energy, so that the frictional resistance of the blade 150 with respect to the adhesive layer 20 can be reduced.

The surface which contacts at least the adhesion layer 20 among the surfaces of the blade 150 may be formed by surface treatment. As a surface treatment, a coating method is mentioned. Since the surface can be modified by surface treatment, the frictional resistance of the blade 150 with respect to the adhesion layer 20 can be reduced.

The coating method is a method of forming the coating layer 162 on the surface of the blade main body 161 by apply | coating a coating agent to the surface of the blade main body 161, as shown in FIG. As the material of the coating layer 162, one having a larger contact angle than that of the blade body 161 can be used.

The blade main body 161 is formed of metal, such as aluminum, from a viewpoint of cutting workability. On the other hand, the coating layer 162 is formed of the material of the water contact angle larger than the blade main body 161, for example, silicone resin. Thereby, the frictional resistance of the blade 150 with respect to the adhesion layer 20 can be reduced.

The thickness of the coating layer 162 is 2 micrometers or more and 200 micrometers or less, for example. If the thickness of the coating layer 162 is 2 micrometers or more, since the coating layer 162 does not tear easily, the durability of the coating layer 162 is favorable. On the other hand, when the thickness of the coating layer 162 is 200 micrometers or less, it is easy to maintain surface roughness. Moreover, since the time required for formation of the coating layer 162 is short, formation of the coating layer 162 is easy.

In addition, although the coating layer 162 covers the whole surface of the blade main body 161 in FIG. 5, you may cover only the surface which contacts the adhesion layer 20. As shown in FIG. What is necessary is just to be able to reduce the frictional resistance of the blade 150 with respect to the adhesion layer 20.

Example

Hereinafter, a specific Example, a comparative example, etc. are demonstrated. In Examples 1-4 described below, Examples 1 to 2 are Examples, and Examples 3 to 4 are comparative examples.

[Example 1]

In Example 1, after facing the polarizing plate and cover glass of the color filter side of a 32-inch (length 710 mm, width 410 mm) liquid crystal display, they are bonded together through an adhesion layer, and the obtained assembly is bonded with a liquid crystal display and an adhesion layer, Peeled with cover glass.

As cover glass, the soda-lime glass (brand name: AS) made from Asahi Glass Co., Ltd. was prepared. The vertical dimension and the horizontal dimension of the rectangular cover glass were 30 mm larger than the vertical dimension and the horizontal dimension of the 32-inch liquid crystal display, respectively. The thickness of the cover glass was 2 mm.

As an adhesive layer, the double-sided adhesive sheet which consists of acrylic transparent resin of length 705mm, width 405mm, and thickness 1mm was used. Lamination | stacking of a liquid crystal display and an adhesion layer, and lamination | stacking of a cover glass and an adhesion layer were performed sequentially using the laminator. The protective sheet which protects the surface which contacts the liquid crystal display of an adhesion layer was removed just before lamination | stacking of a liquid crystal display and an adhesion layer. Moreover, the protective sheet which protects the surface which contacts the cover glass of the adhesion layer was removed just before lamination | stacking of a cover glass and an adhesion layer. The storage shear modulus G 'of the pressure-sensitive adhesive layer was 12 GPa as measured by an MCR rheometer 301 manufactured by Anton Paar.

The peeling apparatus 100 shown in FIGS. 1-4 was used for peeling of a bonded body. The blade tip angle α was 3 °, and the inclination angle β was 40 °. Here, a liquid crystal display corresponds to the bonding material of the utility model registration claim, and a cover glass corresponds to the transparent substrate of the utility model registration request.

The blade was comprised by the blade main body and the coating layer as shown in FIG.

The blade body was produced by molding aluminum.

The coating layer was formed in the surface which contacts an adhesion layer among the surfaces of a blade main body. As the material of the coating layer, a silicone resin (UNA-400, manufactured by Toshiko Corporation) was used.

The water contact angle of the surface which contacts the adhesive layer of a blade was measured based on the static method as described in Japanese Industrial Standards (JIS R 3257: 1999). As a measuring apparatus, the FACE contact angle meter CA-A type manufactured by Kyowa Interface Chemical Co., Ltd. was used. Ion-exchange water was used as water, and the capacity of the water droplet was 5 microliters. The water contact angle of the surface in contact with the adhesive layer of the blade was 143.0 °.

[Example 2]

In Example 2, peeling of a bonded body was performed on the conditions similar to Example 1 except having used another silicone resin (UNA-310 by Toshiko Corporation) as a material of a coating layer. In addition, a bonded body was manufactured on the conditions similar to Example 1.

Example 3

In Example 3, peeling of the bonded body was performed on the conditions similar to Example 1 except having used the blade which consists only of silicone rubber (The Fuso rubber company make, SR-50). In addition, a bonded body was manufactured on the conditions similar to Example 1.

Example 4

In Example 4, peeling of a bonded body was performed on the conditions similar to Example 1 except having used the blade which consists only of tetrafluoroethylene (PTFE) resin (made by Misumi Corporation, PTFE-63-63-10). In addition, a bonded body was manufactured on the conditions similar to Example 1.

[Result of peeling test]

The conditions and results of the peel test are shown in Table 1.

In "Peeling Result" of Table 1, "A" means that peeling of the cover glass was completed without a problem, and "B" means that the peeling did not proceed because the pressure-sensitive adhesive layer and the blade were fixed and the pressure-sensitive adhesive layer was stretched. Means that the stretching of the pressure-sensitive adhesive layer due to the adhesion of the pressure-sensitive adhesive layer and the blade did not occur, but the blade did not proceed and peeling did not proceed.

As is apparent from Table 1, in Examples 1 to 2, since the coating layer was provided on the surface of the blade, peeling of the cover glass was completed. In Example 1 and Example 2, peeling was completed without the problem that a blade tears an adhesive layer.

On the other hand, in Examples 3-4, peeling did not advance. Specifically, in Example 3, peeling did not progress because the adhesion layer and the blade were fixed and the adhesion layer was stretched. Moreover, although the extending | stretching of the adhesion layer by adhesion of the adhesion layer and a blade did not generate | occur | produce in Example 4, a blade did not advance and peeling did not progress.

As mentioned above, although embodiment of the peeling apparatus and the peeling blade was described, this invention is not limited to the said embodiment etc., Various deformation | transformation and improvement are possible in the range of the summary of this invention as described in the claim of utility model registration. Do.

10 display device (incorporation)
20: adhesion layer
30: transparent substrate
100: peeling device
110: support
120: guide
130: slider
150: blade
170: inclination angle adjustment mechanism
180: heater
α: blade tip angle
β: angle of inclination

Claims (5)

As a peeling apparatus which peels the bonded thing bonded together on the transparent substrate through the adhesion layer from the said transparent substrate,
A support for flatly supporting the transparent substrate;
A blade inserted between the transparent substrate and the adhesive layer, the blade separating the adhesive and the adhesive layer from the transparent substrate,
The said blade has a blade body and the peeling apparatus which has a coating layer which covers the surface which contacts at least the said adhesion layer among the surfaces of the said blade main body. The method of claim 1,
Peeling apparatus of the blade tip angle of 1 ° or more and 60 ° or less. The method according to claim 1 or 2,
Peeling apparatus in which the said coating layer consists of silicone type resin. The method according to claim 1 or 2,
Peeling apparatus whose said bonding material is a display apparatus. As a peeling blade which is used for peeling the bonded material bonded to a transparent substrate through the adhesion layer from the said transparent substrate, and inserted between the said transparent substrate and the said adhesion layer,
The blade for peeling which has a blade body and the coating layer which covers the surface which contacts at least the said adhesion layer among the surfaces of the said blade main body.

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