Film stripping mechanism and film stripping device

Abstract

When the film stripping mechanism is used, the stripping object can be prevented from being attached to the base material film again when the film with the film is stripped. The present invention relates to a transfer film peeling mechanism capable of continuously and stably peeling a film from a base film having the film, the transfer film peeling mechanism comprising: a peeling member having a tip portion in direct contact for peeling the film; and a nozzle member disposed on the upstream side of the peeling member in the film conveyance direction, the peeling member and the nozzle member constituting a suction nozzle for sucking the peeled film. The side surface of the peeling member on the downstream side in the film conveyance direction and the side surface of the nozzle member on the upstream side in the film conveyance direction are inclined so as to approach each other toward the tip portion.

Description

Technical Field

[0001] The present invention relates to a film stripping mechanism and a film stripping device comprising the film stripping mechanism. Background Art

[0002] Plastics are used in a variety of fields. On the other hand, they are considered to be the cause of marine pollution such as microplastics. Reducing the environmental impact caused by plastics has become a top priority.

[0003] In addition, in recent years, due to the evolution of the Internet of Things (IoT), the number of electronic devices such as central processing units (CPUs) mounted on computers or smartphones has increased, and the number of laminated ceramic capacitors (multi-layer ceramic capacitors (MLCCs)) required to drive electronic devices has also increased dramatically. The general manufacturing method of the MLCC includes the following steps: using a release film having a release layer formed on a plastic substrate film as a carrier, forming a ceramic green sheet layer on the release film, and peeling off the ceramic green sheet layer to form a ceramic green sheet.

[0004] In the above process, the release film after the ceramic green sheet is peeled off is discarded as useless. That is, the increase in the waste of release films accompanied by the rapid increase in the number of MLCCs in recent years has become an environmental problem, and efforts to recycle plastic base film have become more active.

[0005] In order to reuse the discarded release film, it is only necessary to recover / crush / form it into resin chips, and then melt it again to form a film to obtain a recycled film.

[0006] However, from the perspective of mold release properties, the components of the release layer contained in the release film are different from the components that usually constitute the base film. Therefore, if the release film with the release layer attached is crushed to form a resin sheet and then melted for film formation, the components of the release layer exist in the form of foreign matter, making it difficult to perform stable film formation.

[0007] Even if film formation is possible, the release layer exists as foreign matter on the obtained film, so the quality of the film cannot be avoided due to coloration or changes in the surface composition, and it cannot be regenerated into a film of the same quality as the original base film.

[0008] Therefore, in order to recycle the release film as a recycled film, it is necessary to remove the components of the release layer contained in the release film until an extremely small amount of residue is left at a level that does not cause any problem in the quality of the recycled film.

[0009] As a method for removing a coated film from the surface of a membrane with a coating, the following method is disclosed in Patent Document 1: the coated film is peeled off by rotating a rotating brush having bristles made of metal fibers as a peeling member so that the brush is in direct contact with the coating on the membrane surface, and a plurality of suction nozzles are provided in the circumferential direction of the rotating brush to remove a piece of the coating (hereinafter referred to as a peeling object) attached to the rotating brush.

[0010] Patent Document 2 discloses a method for removing foreign matter from the membrane surface by wetting a rotating rod member with a solvent and bringing it into contact with the membrane surface, so that the foreign matter adheres to the outer peripheral surface of the rod member, thereby recovering and removing the foreign matter. Furthermore, a suction nozzle is disclosed, which is provided with a slit portion capable of reducing pressure for removing the foreign matter from the outer peripheral surface of the rod member in order to prevent the foreign matter adhered to the outer peripheral surface of the rod member from reattaching to the membrane from the rod.

[0011] Prior art literature

[0012] Patent Literature

[0013] Patent Document 1: Japanese Patent Application Publication No. 2012-171276

[0014] Patent Document 2: Japanese Patent Publication No. 62-60749 Summary of the invention

[0015] Problems to be solved by the invention

[0016] In the method of patent document 1, a rotating brush is directly contacted with a film with a coating by pressing it, so that the bending of the hair of the rotating brush after contacting the film with the coating is released, and the peeling material attached to the hair is easy to fly around, and sometimes re-attach to the film. In order to improve the peeling performance of the film, it is necessary to press the rotating brush strongly against the film with the coating and rotate it at a high speed, so it is easy to assume that the scattering of the peeling material becomes significant. In order to recover the peeling material, a suction nozzle is set before and after the brush, but there is no description about the detailed positional relationship between the suction nozzle and the peeling part. In addition, the suction nozzle itself is not mentioned. In the case where it is assumed that the suction nozzle is to be close, it needs to be set between the rotating brush and the conveyed film, but because both are moving, it must be set at a certain distance from either one to make it inaccessible. That is, it is impossible to fully recover and remove the peeled film, and it is impossible to prevent the peeling material from re-attaching to the film, so the quality of the regenerated film deteriorates.

[0017] In addition, in the method of patent document 2, after the stripping material is stripped once by the rod member, the stripping material is removed by transferring it to the outer peripheral surface, but if the rod rotates at a high speed, the stripping material will fly around and there is a possibility of reattaching to the film. In addition, the transferred stripping material falls off on the holding member of the rod member, and the position where it falls off is the positive side of the slit-shaped opening, that is, the position of the edge of the opening. When the edge of the opening is compared with the position directly above the opening, the suction wind speed can be increased directly above the opening where the suction airflow moves forward in a straight line, but at the edge of the opening, there is no suction airflow moving forward in a straight line and the airflow introduced from the surrounding acts, so the suction wind speed is significantly reduced. That is, at the edge of the opening, the suction removal performance of the stripping material becomes low, and the stripping material cannot be fully recovered and removed. As a result, the stripping material remains in the rod member, and the quality of the regenerated film deteriorates. Furthermore, the internal shape of the slit is composed of a certain gap to the bottom, so the flow in the width direction of the film cannot be fully formed inside the suction nozzle. That is, for a wide film, it is impossible to obtain a uniform suction wind speed relative to the width direction of the film. That is, the suction wind speed is particularly increased at the location connected to a suction device such as a blower or a vacuum pump, and the suction wind speed becomes lower in the width direction of the film at a location far away from the location connected to the suction device, thereby causing problems such as insufficient suction and removal performance of the peeling material.

[0018] Therefore, the present invention provides a film stripping mechanism as a mechanism for stripping a coated film from a substrate film having a film. The film stripping mechanism can reliably remove the stripped material by suction while suppressing the scattering or accumulation of the stripped material, thereby preventing the stripped material from re-attaching to the film and causing contamination, and can strip the film stably and continuously for a long time.

[0019] Technical means of solving problems

[0020] [1] The film stripping mechanism of the present invention for solving the above-mentioned problem is a mechanism for stripping the film from a film with a film that has a film on at least one side of a base film and is being conveyed, and comprises: a stripping member having a front end portion extending in the film width direction and used to bring the front end portion into contact with the film with the film to strip the film; and a nozzle member disposed on the upstream side of the film conveying direction than the stripping member, the stripping member and the nozzle member forming a suction nozzle for sucking the film stripped by the front end portion, and the side surface of the stripping member on the downstream side in the film conveying direction and the side surface of the nozzle member on the upstream side in the film conveying direction are inclined in a manner that approaches each other as they approach the front end portion.

[0021] Furthermore, the film peeling mechanism of the present invention is preferably in any one of the following aspects [2] to [5].

[0022] [2] According to the film stripping mechanism of [1], the suction nozzle comprises: an opening portion extending in the film width direction and opening near the front end portion; a slit portion extending in the film width direction and being a flow path connected to the opening portion; and a decompression chamber connected to the slit portion and being a space having a cross-sectional area perpendicular to the suction direction that is larger than that of the slit portion.

[0023] [3] The film peeling mechanism according to [2], wherein the suction nozzle has the opening, the slit, and the decompression chamber formed on the side surface on the upstream side of the nozzle member and the peeling member in the film conveying direction.

[0024] [4] According to the film stripping mechanism of [2], a spacer member is included between the stripping member and the nozzle member, and the opening portion, the slit portion and the decompression chamber are formed on the side surfaces of the nozzle member, the spacer member and the stripping member on the upstream side in the film conveying direction.

[0025] [5] The film peeling mechanism according to any one of [2] to [4], wherein the opening width of the opening in the film width direction is 4% to 150% relative to the film width of the film with the film to be peeled.

[0026] [6] The film peeling mechanism according to any one of [3] to [5], wherein the angle formed between the film with the film and the side surface of the peeling member on the upstream side in the film conveyance direction is 30° to 120°.

[0027] [7] The film stripping device of the present invention comprises: a winding device for winding out the film with the film rolled into a roll; a winding device for winding up the base film after the film is stripped off; and a film stripping mechanism according to any one of [1] to [6], which is arranged between the winding device and the winding device and is used to strip the film from the film with the film being transported.

[0028] Effects of the Invention

[0029] When the film peeling mechanism of the present invention is used, when the film of a base film having a film is peeled off, the peeled film does not re-adhere to the base film, and the film can be peeled off stably and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] [ Figure 1 ] is a schematic diagram of the film stripping device of the present invention.

[0031] [ Figure 2 ]yes Figure 1 A schematic cross-sectional view of a film peeling mechanism used in.

[0032] [ Figure 3 ]yes Figure 2 A three-dimensional view of the interior of the film peeling mechanism.

[0033] [ Figure 4 ] is related to Figure 3 A perspective view of the interior of a different form of the film peeling mechanism of the present invention.

[0034] [ Figure 5 ]yes Figure 2 A schematic top view of the film peeling mechanism shown.

[0035] [ Figure 6 ] is related to Figure 5 A schematic plan view of a different form of the film peeling mechanism of the present invention.

[0036] [ Figure 7 ] is to indicate Figure 2 Schematic diagram of a transport direction velocity vector of a coated film and a suction direction velocity vector of a suction nozzle in a coating peeling mechanism shown.

[0037] [ Figure 8 ] is to indicate Figure 2 Schematic diagram of a velocity vector in the transport direction of a coated film and a velocity vector in the suction direction of a suction nozzle in a coating peeling mechanism of the present invention in different forms. DETAILED DESCRIPTION

[0038] Hereinafter, an embodiment of the present invention will be described based on the drawings. In addition, the following description exemplifies one embodiment of the present invention, and is not limited thereto, and various modifications can be made within the scope of the gist of the present invention.

[0039] Figure 11 is a schematic diagram of a film stripping device 101 of the present invention. The film stripping device 101 includes: a winding device 2 for winding a film 1 having a film 3 on one side of a base film 4 (hereinafter, sometimes referred to as a film with a film); a winding device 5 for winding the base film 4 after the film 3 on the surface of the film with a film 1 is stripped; and a conveying device 6 for conveying the film in the direction of the arrow X while applying tension to the film. In addition, a film stripping mechanism 7 is included between the winding device 2 and the winding device 5, and the film stripping mechanism 7 is used to strip the film 3 from the film with a film, and to suck the stripped stripping material 21 and discharge it to the outside of the device. The film stripping mechanism 7 includes: a stripping member 8 for directly contacting the surface of the film 3 of the film with a film 1 to strip the film 3; and a nozzle member 9, which is arranged at the upstream side of the film conveying direction of the stripping member 8. In addition, the stripping member 8 and the nozzle member 9 are fastened to each other and extend in the width direction of the base film 4. The stripping member 8 and the nozzle member 9 constituting the film stripping mechanism 7 may be fastened by, for example, bolts or clamps, but are not limited thereto. The film stripping mechanism 7 is connected to a tank 10 for storing the stripped material 21 after a single stripping, and a suction device 12 is connected to the tank 10, so that the stripped material 21 stripped by the film stripping mechanism 7 can be sucked.

[0040] Next, use Figure 2 The film peeling mechanism 7 of the present invention will be described in detail. Figure 2 yes Figure 1 The center cross-sectional view in the film width direction of the film peeling mechanism 7 used in the embodiment of the present invention. The nozzle member 9 is arranged on the downstream side in the conveying direction (arrow X) of the film 1 with the film, and the peeling member 8 is arranged on the downstream side, thereby forming an opening 16 to constitute a suction nozzle for sucking and removing the peeling material 21. The nozzle member 9 and the peeling member 8 constitute a suction nozzle, so that the peeling material 21 peeled by the peeling member 8 can be immediately removed by suction.

[0041] The stripping member 8 has a front end portion 15 extending in the film width direction and in contact with the film 1 with a film. The side surface 14 on the upstream side of the nozzle member 9 and the side surface 19 on the downstream side of the stripping member 8 are shaped to be inclined so as to approach each other as they go toward the front end portion 15. By adopting such a shape, the nozzle member 9 can be arranged without being in contact with the film 1 with a film, and the stripping member 8 can be arranged without being in contact with the base film 4. In order to reliably strip the film 3 from the film 1 with a film, it is necessary to strongly push the front end portion 15 to the film 1 with a film, so it is necessary to reduce the angle between the film 1 with a film and the base film 4. If the film stripping mechanism 7 of the present invention is used, the film stripping mechanism 7 can be provided even if the angle between the film 1 with a film and the base film 4 is small. Furthermore, the front end portion 15 can be brought close to the position of the opening 16. As a result, the stripping object 21 can be immediately removed by suction, so that the stripping object 21 does not accumulate on the stripping member 8, or does not fly around after accumulation, and the film can be stripped stably and continuously.

[0042] Next, use Figure 7 and Figure 8 The fluidity of the peeling object 21 in the film peeling apparatus 101 of the present invention will be described.

[0043] Figure 7 Yes means Figure 2 Schematic diagram of the conveying direction velocity vector 22 of the film 1 with the film in the film peeling mechanism 7 and the suction direction velocity vector 24 of the suction nozzle. Figure 7 As shown, the direction of the suction direction component of the transport direction velocity vector 22, i.e., the vector component 23, is opposite to the suction direction velocity vector 24 generated by the suction mechanism 12. This direction reduces the fluidity of the peeling material 21 in the suction direction, which leads to a reduction in the suction efficiency. Therefore, the vector component 23 is preferably small.

[0044] The vector component 23 will increase, decrease or reverse in direction depending on the angle θ between the coated film 1 and the side surface of the stripping member 8 on the upstream side of the film conveying direction. However, in order to reduce the upward vector component 23, it is sufficient to increase the angle θ between the coated film 1 and the side surface on the upstream side of the stripping member 8.

[0045] Figure 8 It means Figure 2 Schematic diagram of a conveying direction velocity vector 22 of the coated film 1 and a suction direction velocity vector 24 of the suction nozzle in a different form of the coating peeling mechanism 7 of the present invention. Figure 8 In, according to Figure 2 The film peeling mechanism 7 is arranged so that the angle θ formed between the film 1 with the film and the upstream side surface of the peeling member 8 is larger than 90°.

[0046] When the angle θ between the coated film 1 and the upstream side surface of the peeling member 8 exceeds 90°, the vector component 23 and the suction direction velocity vector 24 are in the same direction, and the vector formed by adding these acts on the peeling material 21, thereby improving the fluidity of the peeling material 21 and increasing the suction efficiency.

[0047] Next, the peeling property of the film peeling device 101 of the present invention will be described.

[0048] In order to reliably peel the coating 3 from the coated film 1, it is necessary to strongly push the front end portion 15 to the coated film 1. To achieve this, it is effective to reduce the angle between the coated film 1 and the base film 4 as described above. Furthermore, as another method, it is also effective to increase the tension applied to the film.

[0049] From the above, in order to achieve a balance between the fluidity and the peeling property of the peeling material 21, the angle θ formed by the coated film 1 and the upstream side surface of the peeling member 8 is preferably 30° to 120°.

[0050] At this time, if the angle between the coated film 1 and the base film 4 increases, the peeling property may deteriorate. Therefore, it is preferable to increase the tension applied to the film and strongly press the tip 15 against the coated film 1 .

[0051] Furthermore, the angle θ between the coated film 1 and the upstream side of the peeling member 8 is more preferably 30° to 90°. Figure 7 As shown, although the upward vector component 23 is small (zero at 90°), it can be considered that there is almost no effect on the reduced fluidity of the peeling 21, and the angle between the coated film 1 and the base film 4 can be reduced, and the peeling property will not be deteriorated.

[0052] Next, use Figure 2 and Figure 3 The internal structure of the film peeling mechanism 7 will be described. Figure 31 is a perspective view of the inside of the film peeling mechanism 7 in a state where the peeling member 8 is removed from the film peeling mechanism 7. The suction nozzle formed by the nozzle member 9 and the peeling member 8 includes an opening 16, a slit 17, and a decompression chamber 18, and the opening 16, the slit 17 and the decompression chamber 18 are connected. In addition, the pipe connection part 20 is provided at the lower part of the decompression chamber 16, and is connected to the tank 10 via the pipe from the pipe connection part 20. The slit 17 from the opening 16 to the decompression chamber 18 is set as a narrow flow path, thereby preferably designing the pressure loss in the said part to be high, and conversely increasing the volume of the decompression chamber 18, which is a space with a larger cross-sectional area perpendicular to the suction direction than the slit 17, to design the pressure loss in the said part to be low. As a result, it is easy to generate an airflow in the film width direction in the decompression chamber 18, so that the suction wind speed generated in the opening 16 can be made substantially uniform in the film width direction. The gap in the conveying direction of the slit portion 17, the length of the slit portion 17 from the opening portion 16 to the decompression chamber 18, and the volume of the decompression chamber 18 may be appropriately adjusted in size according to the properties of the peeling material to be produced. For example, when the peeling material 21 has no fluidity and is easy to clog the narrow flow path of the slit portion 17, it is preferable to make the gap of the slit portion 17 wide or the length of the slit portion 17 short. When the gap of the slit portion 17 is wide or the length of the slit portion 17 is short, the suction wind speed generated at the opening portion 16 becomes uneven in the film width direction, so it is preferable to increase the volume of the decompression chamber 18 and appropriately adjust the suction wind speed so that it becomes approximately uniform.

[0053] exist Figure 3 In the embodiment, the pipe connection portion 20 is arranged at the center of the nozzle member 9 in the film width direction, but it is not limited to this, and it may be an end portion, or a plurality of them may be provided.

[0054] Next, another embodiment of the film peeling mechanism 7 of the present invention is shown. Figure 4 .exist Figure 4 In the implementation method, it is not Figure 3 Instead of forming a flow path of the slit portion 17 in the nozzle member 9 as in the embodiment of the present invention, the slit portion 17 is formed by inserting the spacer member 13 between the nozzle member 9A without the slit portion 17 and the peeling member 8. With such a structure, the gap of the slit portion 17 or the opening width of the opening 16 in the film width direction can be freely changed by the spacer member 13. That is, when the film width of the film 1 with a coating is various, it can be easily changed so as to obtain an appropriate opening width.

[0055] exist Figure 3 , 4In any of the embodiments, the nozzle member 9 is disposed on the side surface of the stripping member 8 on the upstream side in the film conveying direction, and the wall surface of the stripping member 8 is constituted as one of the inner wall surfaces of the film stripping mechanism 7, thereby eliminating the step difference or the joint of the member generated when the general suction nozzle is attached to the stripping member 8. As a result, even when the viscosity of the stripping object 21 is high, the stripping object 21 will not accumulate inside the film stripping mechanism 7, and the stripping object 21 can be sucked more efficiently.

[0056] [About the opening width of the opening]

[0057] Figure 5 is observed from above across the membrane Figure 2 The schematic top view of the state where the film 3 is peeled off from the film 1 with the film in the film peeling mechanism 7 shown. The opening 16 extends in the film width direction, and its opening width is wider than the width of the base film 4. Since the opening 16 extends in the film width direction, the peeling material 21 peeled off by the peeling member 8 can be immediately sucked over the entire width of the film. In addition, even if the film 1 with the film is meandering in the film width direction, the opening width is wider than the width of the base film 4, so that the peeling material 21 can be immediately sucked within the range of the opening width. On the other hand, when the opening width is too wide relative to the film width, air is preferentially sucked from the opening 16 that is further outside than the film width, so the ability to mainly suck the peeling material 21 decreases. The inventors and others have made efforts to study the opening width, and as a result, it has been confirmed that the peeling material 21 can be immediately sucked when the opening width of the opening 16 is set to 150% or less relative to the film width of the film 1 with the film to be peeled. When the opening width exceeds 150% relative to the film width, it is difficult to suck the peeling material 21.

[0058] Figure 6 is with Figure 5 This is a schematic plan view of a different form of the film peeling mechanism of the present invention, and is a schematic plan view of a film peeling mechanism 7B in which the opening width of the opening 16B is narrower than the film width. Figure 6The film peeling mechanism 7B shown is preferably used when the fluidity of the peeling material 21 peeled by the peeling member 8B is high, for example, it can be particularly preferably used when peeling a film containing a cleaning liquid or the like. Since the peeling material 21 has fluidity, the peeling material 21 flows along the film width direction while following the peeling member 8B to the opening 16B, so even if the film 1 with a film meanders in the film width direction, the peeling material 21 can be sucked and removed. In addition, since the opening area of ​​the opening 16B is narrowed, the suction wind speed or suction pressure in the opening 16B can sometimes be increased, and suction removal can be performed more efficiently. On the other hand, when the opening width is too narrow compared to the film width, the total amount of the peeling material 21 peeled by the peeling member 8B may not be completely sucked, and the opening 16B may be blocked. The inventors and others have made intensive studies on the opening width, and as a result, it has been confirmed that the peeling material 21 can be sucked and removed by setting the opening width of the opening 16B to be 4% or more relative to the film width of the film 1 with a film to be peeled. In the case of being narrower than the above case, there is a phenomenon that the peeling material 21 blocks the opening 16B.

[0059] The tank 10 connected by the pipe connection portion 20 of the film peeling mechanism 7 and the film peeling mechanism 7B (see Figure 1 ) It is preferable that the peeling material 21 sucked by the suction device 12 is not only accumulated but also discharged to the outside from the discharge port 11 after the operation of the device is stopped or during continuous operation. By accumulating the peeling material 21 in the tank 10 and appropriately discharging the peeling material 21 from the discharge port 11 of the tank 10, the peeling material 21 does not flow into the suction device 12, and the malfunction of the suction device 12 can be prevented.

[0060] Next, use Figure 1 and Figure 2 A method for removing the peeling material by suction using the film peeling apparatus 101 will be described in detail.

[0061] The film 1 with a film is placed in the film stripping device 101, and is transported from the unwinding device 2 to the winding device 5. When the film 1 with a film is transported and passes through the film stripping mechanism 7, the film 3 on the surface of the film 1 with a film contacts the front end 15 of the stripping member 8, and the film 3 is stripped. After the film 3 is stripped, it is sucked from the opening 16 of the film stripping mechanism 7 as a stripping object 21. The stripping object 21 moves from the opening 16 through the slit portion 17 to the decompression chamber 18 and the pipe connection portion 20 and is accumulated in the tank 10. At this time, the wind speed of the air sucked from the opening 16 becomes a uniform suction wind speed in the width direction of the film, so that the stripping object 21 generated over the entire width of the film can be sucked from the opening 16.

[0062] In addition, in the case where the film 3 of the film 1 with a film includes a film of a water-soluble resin, a cleaning liquid can be applied to the film 3 of the film 1 being transported before contacting the front end 15. By applying the cleaning liquid, the stripping performance is sometimes significantly improved. As a cleaning liquid applying device (not shown), a water tank for storing water as a cleaning liquid can also be provided at a location upstream of the film conveying direction relative to the film stripping mechanism 7, and a device for immersing the film 1 with a film in the cleaning water or directly applying the cleaning liquid to the surface of the film 1 with a film is provided. As a device for directly applying the cleaning liquid, a high-pressure cleaning machine or a spray nozzle, a spray nozzle, a steam nozzle, etc. can be exemplified. The cleaning liquid can be sucked together with the stripping object 21 by the film stripping mechanism 7, and preferably, the cleaning liquid and the stripping object 21 are accumulated together in the tank 10, and the cleaning liquid or the stripping object 21 is discharged to the outside after the operation of the device stops or during continuous operation. In addition, when discharging, it is more preferable to have a mechanism that can separate the solid peeling material 21 from the liquid cleaning liquid. In the tank 10, the cleaning liquid can be accumulated, so that the suction device 12 can be suppressed from directly sucking the cleaning liquid in the same way as the accumulation of the peeling material 21, and the failure of the suction device 12 can be prevented.

[0063] exist Figure 1 In the film stripping device 101 shown, the pipe connection portion 20 may be connected at one location or at multiple locations. In the case of the pipe connection at multiple locations, the suction air volume is increased compared to the case of one location, and the suction air speed can be increased. On the other hand, in the case where the stripping object 21 is in a knot-like shape, each of the multiple pipe connection locations mutually sucks the knot-like stripping object 21, and as a result, the stripping object 21 may be accumulated inside the film stripping mechanism 7.

[0064] In the above-described embodiment, the case where the film 3 is peeled off from the coated film 1 having the film 3 on one side of the base film 4 is described, but the same method can be applied to the case where the film 3 is peeled off from the coated film 1 having the film 3 on both sides of the base film 4. When the base film 4 has the film 3 on both sides, the film 3 on one side of the coated film 1 is peeled off by the film peeling mechanism 7, and then the coated film 1 is turned upside down, and then the film 3 on the other side of the coated film 1 is peeled off by another film peeling mechanism 7.

[0065] Example

[0066] Hereinafter, the present invention will be described with reference to Examples, but the present invention is not necessarily limited thereto.

[0067] <Base film having a coating (film with a coating)>

[0068] A polyvinyl alcohol resin as a water-soluble resin was formed to a thickness of 0.1 μm on a polyethylene terephthalate substrate film having a thickness of 30 μm and a width of 200 mm, and a film 1 with a coating was prepared by forming a curable silicone resin as a release component to a thickness of 0.1 μm thereon.

[0069] [Example 1]

[0070] The film 1 with a film is placed on the unwinding device 2 of the film stripping device 101. The conveying speed is set to 50 m / min, and a spray nozzle is used as a cleaning liquid applying device to apply 0.1 L / m 2 of the film 3 of the film 1 with a film at a distance of 400 mm from the upstream side of the film conveying direction of the film stripping mechanism 7. 2 The film is peeled off from the coated film 1 while using an amount of water as a cleaning liquid.

[0071] Regarding the film peeling mechanism 7, the length of the front end portion 15 in the film width direction is set to 500 mm, the opening width of the opening portion 16 and the width of the slit portion 17 are set to 200 mm, the gap of the slit portion 17 is set to 2 mm, and the width of the slit portion 17 is set to 100 mm. Figure 2 The length (d1) in the vertical direction of the stripping member 8 is set to 3 mm. The center positions of the front end 15 and the opening 16 in the film width direction are aligned. The position (d2) of the opening 16 is set to a close position at a distance of 3 mm from the front end 15 of the stripping member 8.

[0072] The angle θ formed between the coated film 1 and the upstream side surface of the peeling member 8 was set to 45°, and the angle θ formed between the coated film 1 and the base film 4 was set to 90°.

[0073] A ring blower (VFC608Z manufactured by TERAL) was connected as the suction device 12, and the suction wind speed in the opening 16 was set to 6 m / s, and the film peeling process was set to a constant operation state. In addition, the suction wind speed was measured by using an anemometer (Model 6501-C0 manufactured by KANOMAX) in a state where the height of the opening 16 and the front end 15 of the peeling member 8 were made consistent and the base film was not in contact with the front end 15.

[0074] It was confirmed that during the 10-minute conveyance of the film 1 with the film, the peeling material 21 did not accumulate on the peeling member 8 or block the opening 16, and the peeling material 21 peeled from the film 1 with the film could be immediately sucked. In addition, it was also confirmed that although the film 1 with the film had meandering of up to 10 mm in the film width direction, the peeling material 21 containing water had fluidity, so the peeling material 21 flowed in the film width direction and was sucked in the opening 16 without any problem, and there was no situation in which the peeling material 21 re-attached to the end of the base film 4 during the 10-minute period. The film wound by the winding device 5 was analyzed using scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDX), and the components of the peeling material 21 were not completely detected.

[0075] [Example 2]

[0076] The opening width of the opening 16 of the film stripping mechanism 7 and the width of the slit 17 were set to 300 mm, respectively. The film stripping was carried out in the same manner as in Example 1 under other conditions. It was confirmed that the film 1 with the film was conveyed for 10 minutes, and the meandering of the film 1 with the film also occurred up to 10 mm in the film width direction, but the peeling material 21 did not accumulate on the peeling member 8 or block the opening 16 of the film stripping mechanism 7, and the peeling material 21 peeled from the film 1 with the film was immediately sucked, and there was no situation where the peeling material 21 was re-attached to the end of the base film 4. The film wound by the winding device 5 was analyzed using SEM-EDX, and the components of the peeling material were not detected.

[0077] [Example 3]

[0078] The widths of the opening 16 and the slit 17 of the film stripping mechanism 7 were set to 8 mm, respectively. The film stripping was carried out in the same manner as in Example 1 under other conditions. It was confirmed that the film 1 with the film was conveyed for 10 minutes, and the meandering of the film 1 with the film also occurred up to 10 mm in the film width direction, but the stripping material 21 did not block the opening 16 of the film stripping mechanism 7, and the stripping material 21 containing water flowed in the film width direction near the front end 15 of the stripping member 8, and could be sucked at the opening 16 without any problem. In addition, there was no situation where the stripping material reattached to the end of the base film 1. The film wound by the winding device 5 was analyzed using SEM-EDX, and the components of the stripping material were not completely detected.

[0079] The results of each example are summarized in Table 1.

[0080] [Table 1]

[0081] (Table 1)

[0082]

[0083] DESCRIPTION OF SYMBOLS 1: Base film with a coating (film with a coating) 2: Unwinding device

[0084] 3: Capsule

[0085] 4: Base film

[0086] 5: Winding device

[0087] 6: Transport device

[0088] 7, 7B: Film peeling mechanism

[0089] 8, 8B: Stripping components

[0090] 9, 9A, 9B: Nozzle components

[0091] 10: Cans

[0092] 11: Exhaust port

[0093] 12: Suction equipment

[0094] 13: Spacer components

[0095] 14: Side surface on the upstream side of the nozzle member

[0096] 15: Front end

[0097] 16, 16B: Opening

[0098] 17: Slit

[0099] 18: Decompression Chamber

[0100] 19: Side surface on the downstream side of the front end

[0101] 20: Piping connection

[0102] 21: Stripping

[0103] 22: Speed ​​vector in transport direction

[0104] 23: Vector Components

[0105] 24: Suction direction velocity vector

[0106] 101: Film stripping device

Claims

1. A film peeling mechanism for peeling a film from a film with a film which has a film on at least one side of a base film and is being conveyed, and comprising: a peeling member having a front end portion extending in the film width direction and for bringing the front end portion into contact with the film with the film to peel off the film; and The nozzle member is arranged on the upstream side of the stripping member in the film conveying direction, The peeling member and the nozzle member form a suction nozzle for sucking the film peeled off by the front end portion. The side surface of the peeling member on the downstream side in the film conveying direction and the side surface of the nozzle member on the upstream side in the film conveying direction are inclined so as to approach each other as they go toward the front end portion.

2. The film peeling mechanism according to claim 1, wherein: The suction nozzle has: an opening portion extending in the film width direction and opening near the front end portion; a slit portion extending in the width direction of the membrane and serving as a flow path communicating with the opening portion; as well as The decompression chamber is a space having a cross-sectional area perpendicular to the suction direction larger than that of the slit portion.

3. The film peeling mechanism according to claim 2, wherein: The suction nozzle is formed with the opening, the slit, and the decompression chamber on the side surface on the upstream side of the nozzle member and the peeling member in the film conveyance direction.

4. The film peeling mechanism according to claim 2, wherein: A spacing member is included between the peeling member and the nozzle member, and The opening, the slit, and the decompression chamber are formed on the side surfaces of the nozzle member, the partition member, and the peeling member on the upstream side in the film conveyance direction.

5. The film peeling mechanism according to any one of claims 2 to 4, wherein: The opening width of the opening in the film width direction is 4% to 150% of the film width of the coated film to be peeled off.

6. The film peeling mechanism according to claim 3, wherein: The angle formed between the coated film and the side surface of the peeling member on the upstream side in the film conveyance direction is 30° to 120°.

7. A film stripping device, comprising: A roll-out device, used for rolling out the film with the coating rolled into a roll; A winding device, used for winding the substrate film after the film is peeled off; as well as The film peeling mechanism according to claim 1 is provided between the unwinding device and the winding device and is used to peel the film from the film with the film being conveyed.

Images