WO2008032625A1

WO2008032625A1 - Sheet detaching apparatus

Info

Publication number: WO2008032625A1
Application number: PCT/JP2007/067300
Authority: WO
Inventors: Hirokazu Nagate; Koichiro Goto; Yoshio Kanda; Toshifumi Hosoya; Fumiaki Mizuno
Original assignee: Sumitomo Electric Industries, Ltd.
Priority date: 2006-09-11
Filing date: 2007-09-05
Publication date: 2008-03-20
Also published as: TW200823142A

Abstract

An apparatus that presupposing the utilizing of imparted function and sheet after detachment without damaging thereof, attains detachment of a sheet bonded to a base material without being accompanied by any extensive deformation. There is provided a sheet detaching apparatus for detaching a sheet bonded through an adhesive layer to a base material from the sheet, comprising a sheet gripping part furnished with means for gripping the whole length of an end of the sheet and means for applying stress toward the end.

Description

Specification

Sheet peeling device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a peeling apparatus that separates a flexible sheet attached to a base material via an adhesive layer from the base material.

Background art

[0002] A method of detaching a thin / flexible sheet (hereinafter simply referred to as a sheet) attached to a base material via an adhesive layer from the base material depends on the practical function and form of the product, It has been developed according to the processing purpose. The method can be broadly divided into the case where the sheet is a product body provided with functionality, and the case where the base material is the product body and the sheet protects the base material. In any case, in particular, it is important that the peeling is performed efficiently without adversely affecting the functionally imparted main body. The means of peeling also varies depending on the adhesive strength / J.

[0003] The sheet attached to the substrate is peeled off with an adhesive layer with a knife, a scraper, a rotating brush, etc. is there. These are forces s that are mainly intended for reuse of the base material s. In some cases, the base material is damaged, and in addition, it takes time and effort to remove the residue of the sheet and the adhesive layer.

Therefore, for example, as introduced in Japanese Patent Application Laid-Open No. 2002-184315 (Patent Document 1), a heater is attached to the tip of the knife, and the knife is inserted while heating and softening the adhesive layer. A method has been proposed in which a sheet is lifted and rolled up and peeled off. For example, as introduced in Japanese Patent Application Laid-Open No. 2004-083177 (Patent Document 2), there is a method in which high-temperature steam is blown into a gap between a sheet with a raised edge and a base material to peel it off. These are the sheet stripping means S that makes full use of the sheet and the functions assigned to it, and a large physical or chemical load is applied to the sheet during stripping. There is concern about remaining.

There is also a sheet that only temporarily protects the substrate. In this case, the sheet is temporarily fixed to the substrate with an adhesive layer having relatively weak adhesive strength. In such a case, the convenience of peeling off in advance Think, for example, by providing a protruding part on the sheet or sticking the tape from above and holding it.

[0006] However, when a function is previously imparted to the sheet, there is a case where the sheet is temporarily fixed to the substrate with a high adhesive force in order to maintain the shape. For example, an example is introduced in Japanese Patent Laid-Open No. 2001-328039 (Patent Document 3). In this example, in order to form a functional film on the sheet, the sheet is processed by being attached to a jig as a base material. Therefore, in order to avoid deformation of the sheet during processing, the sheet is attached with a relatively high adhesive force. First, the end is pasted so that it protrudes from the end of the base material, and the protruding part is lifted from the bottom by the lifting member to grasp the end. The sheet is gradually pulled up with compressed air blown into the gap that has been lifted or a small-diameter roller placed in it. In this case, the sheet receives an impact at the time of pushing up and continuously receives a high load on the surface on the gap side while being peeled. For this reason, local bending and deformation of the sheet are inevitable. In addition, when the workpiece has only a small gap and does not have a sufficient shear area, this method does not allow the peeling to proceed smoothly.

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2002-184315

Patent Document 2: Japanese Patent Laid-Open No. 2004-083177

Patent Document 3: Japanese Patent Laid-Open No. 2001-328039

Disclosure of the invention

Problems to be solved by the invention

[0008] The present invention has been made to solve the above-described conventional problems, and its purpose is to peel the sheet without particularly large deformation without damaging the sheet and the function imparted thereto. It is to provide an apparatus for doing this.

Means for solving the problem

[0009] The present invention is a peeling device that separates a sheet attached to a base material via an adhesive layer from the base material, and the sheet gripping portion includes means for gripping the entire length of the end of the sheet, It is a sheet peeling apparatus provided with a means for applying a direction and tension to the end.

In addition to the above configuration, the present invention also includes a peeling apparatus provided with means for softening the adhesive layer from the base material side as a whole. Furthermore, the present invention provides a means for introducing bubbles into the adhesive layer in the substrate. It also includes a device provided with a means for raising the back surface of the sheet evenly on the substrate.

[0011] Furthermore, the present invention also includes an apparatus provided with means for peeling while keeping the angle of the upper surface side formed by the sheet and the base material constantly at 120 degrees or more.

The invention's effect

[0012] With the apparatus of the present invention, the sheet attached to the substrate can be peeled off without significant deformation. Therefore, for example, even if a functional part is provided on the sheet, it is possible to provide an excellent functional sheet in which the function is maximized without impairing the function of the sheet or the functional part.

Brief Description of Drawings

FIG. 1 is an example of an apparatus according to an embodiment of the present invention, and shows a first state of a peeling operation in which a sheet is gripped.

FIG. 2 is a diagram showing an embodiment of the apparatus of the present invention which is the same as the embodiment shown in FIG. 1, and shows a state in which the sheet starts to peel.

FIG. 3 is a diagram showing an embodiment of the apparatus of the present invention which is the same as the embodiment shown in FIG. 1, and shows a state where the sheet is completely detached.

FIG. 4 is an example of an embodiment similar to FIG. 1 of the apparatus of the present invention, showing a state in which a part of the sheet is lifted by blowing fluid from the back surface of the sheet.

FIG. 5 is an example of an embodiment similar to that of FIG. 1 of the apparatus of the present invention, showing a case where the base portion of the gripping portion on the side where the seat is lifted is swung.

FIG. 6 is a diagram showing a formation pattern of an adhesive layer on the back side of a sheet subjected to a sheet detachment test in Example 2 of the present invention.

FIG. 7A is a diagram showing stepwise examples of a preferred embodiment of the apparatus of the present invention.

FIG. 7B is a diagram showing stepwise examples of a preferred embodiment of the apparatus of the present invention.

FIG. 7C shows a step-by-step example of a preferred embodiment of the apparatus of the present invention.

FIG. 7D shows a step-by-step example of a preferred embodiment of the apparatus of the present invention.

FIG. 8A is a diagram showing another preferred embodiment of the apparatus of the present invention.

FIG. 8B is a diagram showing another preferred embodiment of the apparatus of the present invention. FIG. 9] A diagram showing still another preferred embodiment of the apparatus of the present invention.

Explanation of symbols

[0014] 1 sheet

2 Base material

3 Holding part

4 Elastic body

5 Heating mechanism

6 Distribution hole

7 Adhesive layer

8 Monitoring thermometer

9 Monitoring thermometer control unit

11 Vertical drive shaft

71 Area without adhesive layer

72 Area with adhesive layer

BEST MODE FOR CARRYING OUT THE INVENTION

[0015] The sheet peeling apparatus of the present invention has a configuration that prevents the sheet from being deformed as much as possible when the sheet is detached from the substrate. For this reason, the sheet gripping portion includes means for gripping the entire length of the end of the sheet, and means for applying directional force and tension to the gripped end. As a result, the entire edge is gripped, and peeling proceeds while the entire sheet is tensioned in a direction perpendicular to the edge.

[0016] In the apparatus of the present invention, the gripper grips both ends of the sheet. For example, a plurality of ends of the sheet are gripped by a plurality of gripping portions over the entire length thereof. As a result, since the tension is evenly applied to the entire length of the end of the sheet, deformation does not occur over the entire sheet being peeled. For this reason, stress force S is not applied to the sheet and the functional part formed on the surface, and damage is not caused. Further, the sheet may be gripped by a plurality of gripping portions, which may be gripped at one end by one gripping portion. The shape and mechanism of the gripping part can be changed freely depending on the shape of the gripped part of the sheet edge and practical reasons. For example, a sheet that has a substantially rectangular top and bottom surface has two gripping parts at its two ends facing the longitudinal direction. Separately, one end can be gripped by two or more gripping portions, and both ends can be gripped by two gripping portions. There are various means for gripping. For example, when the edge is sandwiched from both the front and back sides, and when the front or back side of the edge is placed on the back or back side of the edge. There are also various materials and shapes for the seats to be gripped. For example, if it is made of soft material with a large coefficient of friction V and material so that the sheet does not slip and slip out of position once contacted, it will be soft and non-adhesive V. And patterning the part of the gripping surface that comes into contact with the sheet.

[0017] In order to increase production efficiency, for example, strip-shaped sheets may be attached to the base material side by side. In such a case, for example, as schematically shown in FIG. 8, two sheets are gripped and the entire lengths of both ends are grasped and peeled off at the same time. Of course, you may grab more sheets and peel them off at the same time. 8A shows a state at the start of peeling, and FIG. 8B shows a state in the middle of peeling with the gripping part lifted. 1 is a sheet, 2 is a base material, and 3 is a gripping portion. Gripping is performed by sandwiching the sheet from both the front and back sides and pressing it with air pressure. In addition, the seating surface to be held is mounted with rubber so that the seat does not shift due to friction. Figure 9 shows the case where multiple strip-shaped sheets are connected and separated after peeling. The reference numerals in the figure are the same as those in FIG. In this cooling, a pleated hole for separation is provided at the boundary between the unit sheets to be finally separated, and each unit sheet is sequentially peeled and separated.

An example of the apparatus of the present invention will be described with reference to FIGS. 1 to 5. Figure 1 shows the initial state of the peeling operation when the sheet is gripped. Reference numeral 1 denotes a sheet, which is attached on the base material 2. The sheet 1 has a rectangular strip shape, and the figure shows a cross section in the length direction. The depth direction in the figure is the width direction. Although not shown, a functional film (functional part) such as an electronic circuit is formed on the upper surface of the sheet. There may be holes or undulations in addition to the functional part in at least one surface of the sheet. The material of the sheet may be a flexible material such as resin, paper, metal, and composite materials thereof. It is also possible to use a sheet with an adhesive layer in advance.

[0019] 2 is a base material to which a sheet is attached, 3 is a gripping part for gripping both ends of the sheet for peeling, and 4 is an elastic body built in the gripping part, which is a spring in this example. This elastic body is As described above, a force that gives an appropriate tension to the sheet. As long as it performs the same function, it may be other than a panel, and may be an elastic body using the pressure of a fluid such as air. In this example, the overall image of the apparatus is not shown, but both ends of the arm of the gripper can be freely moved up and down along the vertical drive shaft 11, and a horizontal drive mechanism (not shown) is shown. As a result, it is possible to move in the horizontal direction integrally with the vertical drive shaft as the work progresses.

[0020] 7 is an adhesive layer. The material should not cause deformation or displacement of the sheet due to the load applied to add functionality to the sheet! Also, it should be as low as possible! /, And should be soft at temperature and easily peel off. It is more desirable if the softening temperature or the temperature at which the adhesive strength is lowered is lower than the softening temperature of the sheet. In addition, the formation pattern in the surface of the adhesive layer is preferably one that can cover the entire surface to which the function is imparted. However, it does not become an obstacle to imparting functionality to the sheet or in practical use, and it can withstand the direction and level of the load when imparting functionality, and does not cause deformation or displacement of the sheet. If the adhesive strength is obtained, a partially covered pattern may be used. This is because if it is possible to make a part without an adhesive layer in the surface, it will be easier to peel off.

[0021] Reference numeral 5 and 6 indicated by a broken line are examples of a mechanism for assisting the separation of the seat (hereinafter also referred to as a separation assist mechanism or simply an assist mechanism). In this example, 5 is a heating mechanism arranged under the base material, and 6 is a flow hole through which a fluid contained in the base material passes. The pressure-sensitive adhesive layer can be indirectly heated by the heating mechanism 5 through the substrate 2 and the temperature can be raised to a temperature that softens the pressure-sensitive adhesive layer. Any heat source may be used as long as the temperature can be raised to a temperature equal to or higher than the softening temperature of the adhesive layer. For example, a sheet heater or an electric resistance wire embedded type is conceivable, but water vapor may be used if the softening temperature is around 100 ° C. Reference numeral 8 is a non-contact type monitoring thermometer (thermography) provided for monitoring and controlling the surface temperature of the sheet or adhesive layer, and 9 is a control unit thereof.

[0022] The flow hole 6 through which the fluid contained in the base material passes is one of the separation assist mechanisms. The auxiliary mechanism in this example is provided to flow the fluid evenly from below the adhesive layer to the lower surface thereof and to promote the detachment of the sheet. The outer ring shape of the hole, the form and pattern of arranging it in the substrate The sheet and the function imparted to the sheet may be energized and may function to promote separation without greatly deforming the sheet. In addition, for example, in order to make it easier for the sheet to be detached from the base material, the fluid may be preheated or a fluid having a higher viscosity may be used as the separation assist mechanism. As an example, FIG. 4 schematically shows a state in which a fluid (for example, air) is blown up from the fluid source 10 in the direction of the arrow through the flow hole 6 and a part of the sheet 1 starts to be detached from the adhesive layer 7. It is a representation. If the adhesive force is large and there is a risk of deformation when the sheet is peeled off, gripping the sheet and starting peeling from the substrate will start when the adhesive force is reduced in advance by the function of these separation assist mechanisms. To do. At the start of peeling, the sheet is placed on the base material in a substantially horizontal state and is not deformed. In this state, the depth (width) direction of the sheet is grasped by the entire length, and for example, the left end in the length direction is grasped and gradually raised as shown in the figure. If the adhesive force is low enough to be easily removed, it can be removed more quickly by gradually raising both ends at the same speed that does not affect the functional part while holding both left and right ends in the same manner. In this way, the sheet is released from the substrate with almost no bending deformation.

[0023] Further, the separation assist mechanism may be a mechanism completely different from this example. For example, in the surface pasted as described above, there is a hollow portion without an adhesive layer, which runs in the form of a line or a stitch in the width and / or length direction of the sheet, and these edges are outside. There is a form that leads to. If such a configuration is realized within a range where there is no practical problem, the fluid can be easily removed there. Further, if the adhesive layer can be easily detached by cooling, the refrigerant may be flowed there under conditions that do not impede practical use on the sheet or functional part. Furthermore, for example, if the adhesive layer is in contact with a specific fluid (air, water, etc.) or embraces it (forms bubbles) to reduce the adhesive strength, the above gaps, etc. There is also a means for blowing fluid through the adhesive layer. In this way, it is conceivable to alter only the adhesive layer by contact with the fluid and reduce its adhesive strength. A means of heating or cooling at the same time as the contact is conceivable whether the fluid is blown or altered. The separation assist mechanism of the present invention may simultaneously perform a plurality of types of means as described above as long as there is no obstacle in practical use of the seat.

[0024] FIG. 1 shows an initial stage of peeling the sheet 1 from the substrate 2 as described above. this In the example, the outer edge of the sheet 1 protrudes from the base material 2, and the entire length of the sheet in the longitudinal direction of the sheet is first formed into a planar or linear shape with the gripping portion 3 while being shell-occupied. Grab with equal force. Although not shown, there is a soft and freely deformable seat such as rubber, foamed resin or non-woven fabric at the tip of the gripping portion, and the seat is gripped flexibly with some margin. In addition, a small chamfer may be made at the upper end in the width direction of the base material to assist peeling. In this state, the sheet is immediately subjected to slight tension by the elastic body 4 with a built-in grip. This tension is adjusted to an appropriate level. For this reason, it does not have an adverse effect on the prepared sheet and the functional parts attached thereto. Furthermore, even if the sheet tensile strength changes due to temperature rise by the separation assist mechanism, an excessive load force is not applied to the seat. The desired tension for this depends on the material and the applied form, but is determined in consideration of the tensile strength of the sheet in the peeling environment (temperature, humidity and atmosphere). For example, in a normal manufacturing environment (in the air, normal temperature, humidity of 60% or less), it is generally desirable that the material is in the range of 1/3 to 2/3 of the tensile strength at normal temperature. If it is less than 1/3, it may be deformed by a small impact or load such as wind from the surrounding area. If it exceeds 2/3, deformation and damage are likely to occur in weak parts such as apertures. Therefore, at this stage, the sheet is not deformed in the thickness direction or the width direction. In addition, since the edge of the sheet is gripped in a planar or linear shape, the sheet is lifted in an appropriate tension state, and the entire edge starts to peel at an even speed. For this reason, the sheet does not deform in both the length and width directions.

Fig. 2 shows the state where one gripping part of the sheet is being lifted by the drive mechanism. The broken line indicates the first stage in FIG. Since the entire length of the edge of the sheet is constrained by the gripping part (for example, in a linear or planar contact state), there is no deformation in the thickness direction or the width direction. Curved force in the length direction as shown in the figure The angle Θ on the upper surface side between the sheet and the substrate and the angle Θ on the lower surface side are constantly peeled in a state of 120 degrees or more.

1 2

It is desirable to perform separation. More desirably, it is 150 degrees or more. In practice, the lifting speed should be adjusted so that the seat 1 is not bent as much as possible, taking into account various conditions such as the separation assist mechanism. For example, as shown in Fig. 5, the base part of the gripping part 3 on the lifted side is swung within a certain range, or peeling starts so that the sheet bending angle of 120 degrees or more can be maintained. Tilt the gripping part to a certain downward angle from the moment If the sheet is tilted and tension is applied to the sheet by the elastic body 4, this angle range can be easily realized.

FIG. 3 shows a state where the grips at both ends are lifted and the sheet is completely detached. The state in the process of peeling in Fig. 2 is indicated by the broken line. It is desirable that the timing of lifting the other gripping part is determined, for example, in view of a state where the sheet is peeled and lifted 90% or more in the length direction. It is desirable to switch to a lower speed at that timing. This operation can be programmed in advance in the control mechanism of the drive unit. Fig. 7 shows the more preferable V in this case, and the work example is divided into stages A to D. Note that even in the stage of! /, The broken line indicates the state of the previous stage. In step A, the left-hand side of the sheet peels off halfway as shown in Fig. 3. Next, in Step B, the left hand side of the seat is lowered and seated evenly. Next, in stage C, the left-hand side of the sheet remains in stage B and the right-hand side begins to peel. In the last stage D, when the right-hand side has been peeled off, lift the left-hand side grip again to finish the release of the sheet. The above operation is also applied to the cases shown in FIGS. As shown in Figs. 1 to 3, when the gripping part on the left hand side is lifted and the peeling is advanced, the sheet is suddenly released when the gripping part on the right hand side is finally lifted, and the force of concentrated deformation stress on the sheet, Forces that can be applied Programming such operations as shown in Fig. 7 can prevent such deformation stresses from occurring. In such a case, even if the other gripping portion is swung or tilted downward, if the tension is applied, the sheet will not stagnate and bend greatly. Note that the separation assist mechanism may stop its operation until just before the next unit sheet to be peeled or a continuous body of unit sheets is supplied. This is because, for example, when a fluid is poured from the circulation hole 6, the installation of the next sheet may be hindered. Hereinafter, the present invention will be described by way of examples, but the present invention is not limited thereto.

Example 1

[0027] A long sheet made of paper having a width of 80 mm and a thickness of 200 µm, polyethylene terephthalate (hereinafter abbreviated as PET), and pure aluminum (A1) was prepared. These original fabric sheets were fed from the roller to the first molding machine, and first, a perforation for bending was made in the center in the width direction along the length direction. Next, it is sent to the second molding machine, and it is between 160mm in the direction perpendicular to the length direction. Separated into strips at intervals. The perforations are all broken lines, and there are cone-shaped protrusions protruding about 20 m from the surface at the periphery of the hole. On a flat substrate made of glass fiber reinforced epoxy resin with a width of 100 mm, length of 155 mm, and thickness of 2 mm covered with fluororubber, an adhesive layer made of “Millable Silicone Rubber” manufactured by NEC Corporation Then, the sheet surfaces with the conical protrusions were bonded together while being pressed with a roller.

[0028] Next! /, A functional portion was formed on one side of the center folding perforation on the front side surface of the sheet. For PET sheets, trauma chemicals (sheet material code a), paper sheets with water-soluble paint (sheet material code b), and A1 sheets for solid oil-based paint (sheet material) Each of the symbols c) was coated with a screen printer in a predetermined pattern, and these were dried and fixed. These are all dried and hardened slightly by applying a protective agent, etc., but they are damaged by the bending impact of the sheet and may be altered when exposed to high temperatures. In addition, a special function unit was added! /, N! /, And PET sheets (sheet material code d) were also prepared. The above four types of sheet samples were prepared for 50 sheets each.

[0029] Next, these sheet sample groups attached to the base material were sequentially sent to the peeling apparatus of the present invention by means of a belt, and peeled according to the following procedure. First, the base material 2 provided with the flow holes 6 (broken lines) shown in FIG. 1 is placed on the heater 5, and the right and left grips 3 that can move up and down on the drive shaft 11 are used in the depth direction of the sheet. Grasping the full length with a soft force. At this point, light tension is applied to the sheet by the spring 4 built in both grips. In addition, as shown in FIG. 5 described above, the gripping arm force of both gripping portions can be swung downward on the seat side. The surface temperature of the sheet can be controlled by the temperature controller 9 through the thermography 8 on the upper right hand side, and in this case, it is kept at about 100 ° C, which does not adversely affect the functional parts of the sheet! / RU The adhesive layer is for temporary fixing and softens at temperatures below 50 ° C. Sample numbers 16 and 18 in the table were subjected to the same peeling test with only air blowing without heating the bottom force, and sample numbers 19 to 21 were subjected to the same peeling test without heating with only heating from below. is there. Regarding the condition of the functional parts after withdrawal, the degree of damage was determined by checking all of them with the naked eye and a 100x microscope. ◎, ○, and X correspond to the levels of “There are no practical obstacles”, “No practical obstacles” and “Yes” levels, respectively.

Next, as shown in FIG. 4, the air holes 6 are passed from the blower 10 as the fluid source from below the base material. When air is fed in, the adhesive layer softens and the sheet slightly floats from the adhesive layer while being slightly pulled left and right. At this time, as shown in FIG. 2, when the gripping portion is gradually moved upward, the sheet is detached from the base material after being curved in the middle. In the present example, the angle of the curved portion was changed by fixing the right hand gripping portion in the initial state without raising the gripping portion for a predetermined time from the start of separation, and the influence of the functional portion was examined. The results are shown in Table 1. Samples with * in front of the sample number in the table are comparative samples.

[table 1]

Sheet material Release condition Status of functional part after release Number Sign Right gripping part Bending angle of both gripping parts Degree of damage

State of head swing presence (.)

i Θ ₂

1 a Initially fixed None 160 160

2 a Initial fixed 150 150

3 a Initial fixed 120 120

4 a Initial fixed None 110 110 〇

5 a Initial fixed 100 100 〇

6 b Initially fixed 150 150 ©

7 b Initially fixed None 140 140

8 b Initially fixed 120 120 ©

9 b Initially fixed None 110 110 ○

10 b Initially fixed None 100 100 ○

11 c Initially fixed 150 150

12 d Initially fixed 150 150

13 a Initially fixed Available 175 175

14 b Initially fixed Available 175 175

15 c Initially fixed Available 175 175

16 a Initial fixed 135 135

17 b Initially fixed 130 130

18 c Initially fixed «125 125

19 a Initial fixed 150 150

20 b Initially fixed 140 140

^ 22 a Initially fixed The entire sheet is double X

b Initially fixed Roughly deformed deformation X

^ 24 c Initially fixed »X

* 25 a Initially fixed Especially the width of the sea ridge X

¾6 b Initial fixing direction center is double X

27 c Initially fixed Roughly deformed deformation X * Indicates comparative example

[0032] In the case of the sample indicated as “initially fixed” in the table, the sheet bending angle is adjusted by applying tension to the sheet from the state in which the right gripping part in FIG. 2 is fixed to the level in FIG. The left grip was moved upward at a speed of 50 mm / sec. In addition, the bending angles Θ and Θ are in the table.

When the level reached 1 2, the right grip was also raised at a speed of 50 mm / sec while applying tension to the sheet. Therefore, the angle in the table is the minimum value in the separation process. Sample number 13 and later are cases where both grips swing their heads downward toward the seat side even though the right grip is initially fixed. Sample numbers 22 to 24 in the table hold the entire length of the end, but do not have a panel built in the gripping part and do not apply tension to the sheet. A peel test was performed by applying tension while gripping the two ends on the side of the wire.

[0033] From the above results, the following can be understood. Use a release assist mechanism that lifts evenly by blowing from the back of the sheet or softens by uniform heating, and then weakens the adhesive strength of the adhesive layer as a whole. If the sheet is detached from the substrate by means of separating the entire side of the edge width at a uniform speed, the sheet can be peeled without damaging the functional part of the sheet. Note that the sheet should not be bent to an angle of less than 120 degrees (ie, the bending angles θ and Θ in Table 1 should be less than 120 degrees).

1 2

By removing it, damage to the functional part can be reduced.

Example 2

[0034] In Example 1, the force with which the adhesive layer was formed on the entire surface of the sheet, and the same sheet material and substrate were used to form a gap without an adhesive layer in the form of Fig. 6 in the adhesive layer. did. In FIG. 6, 71 is a portion without the adhesive layer arranged in accordance with the position of the vent in FIG. 1, and 72 is a portion with the adhesive layer. Using these samples, a detachment test was conducted while supplying hot air of 50 ° C. through sample holes 19 to 21 of Example 1 into the gaps between the adhesive layers in the adhesive layer through the vent holes. The results are shown in Table 2. From this result, it can be seen that the apparatus force S of the present invention having the above-described detachment assist mechanism is effective for detaching the sheet without damage.

[0035] [Table 2] Trial Sit material Release condition Status of functional part after release Material Sign Right gripping part Bending angle of both gripping parts Degree of damage

Number of heads Swing presence / absence (.)

No. Θ Θ

28 a Initial fixed None 150 150 ◎

29 b Initially fixed 140 140 ◎

30 Initially fixed 140 140 ◎

Industrial applicability

According to the present invention, a functional part that is easily damaged by deformation is formed on one surface thereof. Even if a thin sheet of resin, metal foil or the like is detached from the substrate to which it is attached, the functional part is damaged. Can be provided.

Claims

The scope of the claims

[1] A peeling device for separating a sheet attached to a base material via an adhesive layer from the base material, wherein the sheet gripping portion of the device includes means for gripping the entire length of the end of the sheet, A sheet peeling apparatus comprising means for imparting a directing force and tension to the end of the sheet.

[2] The peeling apparatus according to [1], further comprising means for softening the adhesive layer from the base material side.

[3] The peeling apparatus according to [1] or [2], wherein the substrate includes means for introducing bubbles into the adhesive layer.

[4] The method according to claim 3, comprising means for lifting the back surface of the sheet evenly on the base material;

V, peeling device according to any of the above.

[5] The peeling apparatus according to any one of [1] to [4], wherein the peeling is performed while the angle on the upper surface side formed by the sheet and the base material is constantly maintained at 120 degrees or more.