JP2010042922A - Device and system for peeling protecting film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain generation of wrinkle and deformation during peeling a protective film of a base body where the protecting film is stuck to its surface. <P>SOLUTION: The protective film peeling device 20 includes a case body part 22, a delivery part 24 delivering a single face adhesive sheet 30, a winding part 26 winding the delivered single face adhesive sheet 30, and a contact head 28 disposed between the delivery part 24 and the winding part 26 and where the single face adhesive sheet 30 is folded and hung over to make the adhesive face of the single face adhesive tape face the surface side. The protective film and the contact head 28 are bonded through the adhesive face of the single face adhesive sheet 30 by abutting and pressing the tip end part of the contact head 28 to the peeled protecting film of the base body, and the entire case body part 22 is moved in a direction to separate from the protecting film, thus peeling the protecting film from the base body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a protective film peeling apparatus and a protective film peeling system, and more particularly, to a protective film peeling apparatus and a protective film peeling system for peeling a protective film on a substrate to which the protective film is attached.

  As the optical element film such as a polarizing film or a retardation film, an optical plastic film provided with appropriate polarization characteristics and retardation is used, and a protective film is often provided to protect the surface. The protective film can be attached to the surface of the optical element film using an appropriate adhesive layer or the like. Moreover, since it is not used until an optical element film is attached to objects, such as a display surface of a liquid crystal display, the film called a separator which protects the surface of an adhesion layer temporarily is stuck until then. The separator is peeled off and discarded when the optical element film is actually attached to the object. In that respect, the separator can be considered a protective film for temporary use.

  For example, Patent Document 1 describes a structure in which a transparent protective layer is added to both sides of a polarizer or a polarizing film as a polarizing plate, and a separator is provided on one side of the transparent protective layer via an adhesive layer. Yes. Here, the transparent protective layer is for the purpose of improving the water resistance and handling of the polarizing film, and a plastic film having a thickness of 1 to 300 μm such as a polyester resin is used. The adhesive layer is made of an appropriate solvent such as toluene. A natural or synthetic resin dissolved or dispersed and coated with a thickness of 10 to 100 μm is used. When the adhesive layer is exposed on the outer surface, the separator is put to practical use. In the meantime, it is stated that a plastic film having a thickness of 10 to 200 μm is used as a temporary cover for the purpose of preventing contamination.

  As described above, the optical element film is often manufactured by attaching a protective film through an adhesive layer. The protective film remains affixed until the adhesive layer is put to practical use, but it may be inconvenient, for example, when an inspection is performed. That is, the core part of the optical element film is a polarizer or a polarizing film part. However, when a protective film is applied, the characteristics of the polarizer or the polarizing film cannot be directly inspected. Inspection.

  For example, in Patent Document 2, a visual inspection by an inspector is performed as an appearance inspection method when a surface protective film is attached to the surface of a transparent sheet such as a polarizing film. It is stated that it is necessary to unify the inspection level among the inspectors. Therefore, by comparing the binary data of transmitted light by visible light and the binary data of reflected light by infrared light, even if the surface protective film is not peeled off, bubbles and foreign matters mixed in the transparent film and surface protection It is disclosed that bubbles and foreign matters mixed in a film can be distinguished.

JP 2002-22950 A Japanese Patent Laid-Open No. 7-311160

  As described in Patent Document 2, the characteristics of the optical element film on which the protective film is adhered are inspected by visual inspection by an inspector. As described above, the inspection is performed through the protective film. Become. If the apparatus of patent document 2 is used, it can test | inspect the bubble and foreign material in transparent films, such as a polarizing film with which a protective film is stuck, without peeling a protective film. However, for this purpose, a special inspection device and a special image processing technique are required, and items that can be inspected are limited to appearance items such as bubbles and foreign matters.

  Therefore, it can be considered that the protective film is peeled off and inspected. However, the protective film is thin and is adhered to the polarizing film or the like through the adhesive layer, so that it is peeled off without damaging the polarizing film or the like. Careful attention is required to do this. Moreover, since the protective film once peeled becomes wrinkles at the time of peeling and is often deformed, it is difficult to apply it to the optical element film again. Therefore, the optical element film from which the protective film has been peeled off by this method is discarded after the inspection without being attached again.

  As described above, in the case of an optical element film having a protective film attached to the surface, it is beneficial if the protective film can be peeled cleanly without generating wrinkles or deformation. That is, it can suppress damaging the optical element etc. which are protected with the protective film by peeling off neatly. Moreover, if the wrinkles and deformation | transformation at the time of peeling disappear, it will also become possible to reattach and reuse the protective film once peeled.

  The objective of this invention is providing the protective film peeling apparatus and protective film peeling system which can suppress generation | occurrence | production of a wrinkle and a deformation | transformation when peeling a protective film in the base | substrate with which a protective film is stuck on the surface.

  A protective film peeling apparatus according to the present invention is a peeling apparatus that peels a protective film from a substrate on which a protective film is adhered, and feeds a single-sided adhesive sheet in the direction orthogonal to the width over the entire width. A feeding part, a winding part that winds the single-sided adhesive sheet across the entire width in a direction perpendicular to the width, and a contact head that is disposed between the feeding part and the winding part and extends in the width direction. The contact head that is fed back from the feeding portion and folded back so that the adhesive surface of the single-sided adhesive sheet is on the front side at the tip of the contact head, A protective film through the adhesive surface of the single-sided adhesive sheet by pressing the tip of the contact head against the protective film of the substrate to be peeled. Contact De is bonded, characterized by separating the protective film from the substrate by moving in a direction away the entire casing from the protective film.

  A protective film peeling system according to the present invention includes a protective film peeling device that peels a protective film from a substrate on which a protective film is adhered, a holding unit that holds the substrate, and a protective film peeling device that moves relative to the holding unit. A peeling device moving mechanism, and a protective film peeling device is provided with a feeding part that feeds the single-sided adhesive sheet in the direction orthogonal to the width over the entire width, and the single-sided adhesive sheet over the entire width. A winding part that winds in a direction perpendicular to the width, and a contact head that is disposed between the feeding part and the winding part and extends in the width direction, and the adhesive surface of the single-sided adhesive sheet is the surface at the tip of the contact head A contact head on which the single-sided adhesive sheet fed from the feeding portion is folded and folded back to the winding portion, and a housing portion that holds the feeding portion, the winding portion, and the contact head. The contact head is bonded to the protective film of the single-sided adhesive sheet by pressing the tip of the contact head against the protective film of the substrate held by the holding unit, and the protective film peeling device is moved by the moving mechanism. The protective film is peeled from the substrate by moving the substrate in a direction away from the surface of the substrate.

  Further, in the protective film peeling system according to the present invention, the peeling device moving mechanism moves the protective film peeling device toward the surface of the substrate and contacts the contact head over the entire width direction of the upper surface of the protective film. The first moving means of the peeling device that adheres the adhesive surface of the single-sided adhesive sheet at the tip of the contact head to the protective film, and the protective film peeling device is moved away from the surface of the substrate to peel the protective film from the substrate It is preferable to have a peeling device second moving means.

  Further, the protective film peeling system according to the present invention includes a ruler-shaped pressing member having a length capable of pressing the protective film over the entire width direction, and a pressing member moving mechanism for moving the pressing member. The pressing member moving mechanism includes a pressing member first moving unit that moves the pressing member toward the surface of the substrate and presses the pressing member over the entire width direction of the upper surface of the protective film, and a peeling device second moving unit. In cooperation with the movement of the protective film peeling device, the protective film peeling position is such that the pressing member is positioned on the other side of the protective film and the pressing position of the pressing member is the boundary between the protective film peeling part and the sticking part. After the protective film is partially peeled until it is aligned and the substrate is exposed in that state, the pressing maintenance means at the time of peeling, and after the pressing maintenance at the time of peeling The pressing member is orthogonal to the width direction of the substrate in synchronism with the movement of the protective film peeling device from the other end side to the one end side along the direction orthogonal to the width direction of the substrate by the peeling device moving mechanism. Move the contact head from the other end side to the one end side along the direction while pressing the contact head so that the pressing position of the contact head is the boundary between the protective film sticking part and the peeling part. It is preferable to have a pressing member third moving means that presses and re-sticks to the surface of the pressing member.

  Moreover, the protective film peeling system which concerns on this invention WHEREIN: It is preferable to provide the peeling state test | inspection apparatus which arrange | positions in the position corresponding to a holding | maintenance part and test | inspects the base | substrate exposed as a state in which the protective film was partially peeled.

  According to at least one of the above-described configurations, the protective film peeling apparatus is provided between the feeding unit and the winding unit, and between the feeding unit and the winding unit that feeds the single-sided adhesive sheet in the direction orthogonal to the width over the entire width. A contact head that is disposed and extends in the width direction, and the single-sided adhesive sheet drawn from the feeding portion is hung and folded back to the winding portion so that the adhesive surface of the single-sided adhesive sheet is on the front side at the tip portion including. Then, the protective film and the contact head are bonded via the adhesive surface of the single-sided adhesive sheet by pressing the tip of the contact head against the protective film of the substrate to be peeled and moved in a direction away from the protective film. By doing so, the protective film is peeled off from the substrate. Thus, since a protective film peels from the base | substrate over the whole width | variety, the wrinkle in the case of peeling and a deformation | transformation can be suppressed.

  Further, according to at least one of the above-described configurations, the protective film peeling system includes a protective film peeling device that is movable with respect to the holding unit that holds the substrate, and the protective film peeling device extends the single-sided adhesive sheet over the entire width thereof. The feeding portion and the winding portion that are fed out in a direction orthogonal to the width are arranged between the feeding portion and the winding portion so as to extend in the width direction so that the adhesive surface of the single-sided adhesive sheet is on the front side at the tip portion. And a contact head on which the single-sided adhesive sheet fed from the feeding portion is hung, folded back and returned to the winding portion. Then, the protective film and the contact head are bonded via the adhesive surface of the single-sided adhesive sheet by pressing the tip of the contact head against the protective film of the substrate to be peeled and moved in a direction away from the protective film. By doing so, the protective film is peeled off from the substrate. Thus, since a protective film peels from the base | substrate over the whole width | variety, the wrinkle in the case of peeling and a deformation | transformation can be suppressed.

  Also, in the protective film peeling system, the protective film peeling device is moved toward the surface of the substrate, the contact head is contacted and pressed across the entire width of the upper surface of the protective film, and the single-sided bonding of the tip of the contact head is performed. The adhesive surface of the sheet is adhered to the protective film, and is moved in a direction away from the surface of the substrate to peel the protective film from the substrate. In this way, the contact head is bonded over the entire width of the protective film via the single-sided adhesive sheet and moved, so that the protective film can be peeled from the substrate over the entire width of the protective film.皺, deformation can be suppressed.

  Further, in the protective film peeling system, a protective ruler-shaped pressing member having a length capable of pressing the protective film over the entire width direction is provided, and the pressing member is moved toward the surface of the substrate. The pressing member is pressed over the entire width direction of the upper surface of the protective film, and in cooperation with the movement of the protective film peeling device, the pressing member is pressed on the other side of the protective film, and the pressing position of the pressing member is the protective film. The protective film is partially peeled until the peeled position of the protective film is aligned so as to be the boundary between the peeled portion and the pasting portion, and the substrate is exposed in that state. After that, in synchronization with the movement of the protective film peeling device from the other end side to the one end side along the direction orthogonal to the width direction of the substrate, the pressing member is moved along the direction orthogonal to the width direction of the substrate. Then, move the contact head from the other end side to the one end side while pressing the contact head so that the pressing position of the contact head is the boundary between the protective film sticking part and the peeling part. Press and re-apply.

  In this way, a ruler-shaped pressing member that can be pressed over the entire width direction of the upper surface of the protective film is used, and the pressing position of the ruler-shaped pressing member becomes the boundary between the peeling portion and the pasting portion of the protective film. In this way, the protective film is peeled until the protective film peel positions are aligned. When re-sticking after inspection, the pressing position of the pressing member is the protective film while moving the ruler-shaped pressing member on the upper surface of the protective film from the other end side to the one end side in the direction opposite to the peeling. This is performed while aligning the peeling position of the protective film so as to be the boundary between the peeling portion and the pasting portion. Thus, the peeled protective film is suppressed from becoming wrinkles or deformed, and the protective film can be neatly reapplied to the substrate without wrinkling or deforming the protective film.

  In addition, since the protective film peeling system includes a peeling state inspection device that inspects the exposed substrate as a state in which the protective film is partially peeled off, the object can be inspected when the protective film is not interposed. Compared with the inspection performed with the protective film attached, the reliability of the inspection can be improved.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, below, a polarizing film body is demonstrated as a structure containing a protective film and a base | substrate. Here, the polarizing film body includes a polarizer sheet and protective sheets on both sides thereof, and an outer sheet is provided on the outer surface of one of the protective sheets, and the outer surface of the protective sheet on the other side. An adhesive layer is provided, and a separator is attached to the adhesive layer. The separator corresponds to a protective film, and the other elements correspond to a substrate.

  The structure of the polarizing film body described below is an example, and of course, a polarizing film body having a structure other than this may be used. For example, the protective sheet may be only on one side. Moreover, the structure where a separator serves as a protective sheet may be sufficient.

  In the following, the separation of the separator from the adhesive layer will be described. However, the separation of the outer sheet disposed on the opposite side of the separator with the polarizer sheet in between is only different in adhesive force and the like. The present invention can be similarly carried out for peeling. In this case, the outer sheet corresponds to the protective film, and the other elements correspond to the substrate.

  The optical element sheet included in the substrate may be other than the polarizer sheet. For example, a phase difference sheet may be used, and a half mirror sheet having special reflection characteristics may be used. Further, although the substrate is described as a sheet having flexibility, it may be a plate having appropriate rigidity. Further, the substrate may not be related to the optical element. For example, a paint may be applied or an appropriate surface treatment may be performed, and a protective film may be temporarily attached to the surface. In this case, the substrate is a product such as a display panel that has been surface-treated. For example, when protecting the surface of a product that has undergone a decorative surface treatment with a transparent protective film until the sale is actually completed, or protecting the surface of the product to prevent scratches during transportation The case where it protects with a film may be sufficient.

  Note that the dimensions, materials, and the like described below are examples for explanation, and can be appropriately changed in accordance with the specifications of the substrate having the protective film.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is a diagram illustrating the configuration of the protective film peeling apparatus 20. As for this figure, about the protective film peeling apparatus 20, the side view is shown by the upper side of the paper surface, and the top view is each shown by the lower part side. The protective film peeling apparatus 20 has a function of using a single-sided adhesive sheet to peel from the substrate over the entire width of the protective film.

  The protective film peeling apparatus 20 includes a housing part 22, a feeding part 24 that feeds the single-sided adhesive sheet 30, a winding part 26 that winds the fed single-sided adhesive sheet 30, and between the feeding part 24 and the winding part 26. The single-sided adhesive sheet 30 is folded and hung so that the adhesive surface of the single-sided adhesive tape faces the front side.

  The casing 22 is a case having an outer shape suitable for gripping or mounting so that an operator can grip it by hand or can be attached to an appropriate moving device. The housing portion 22 is provided with the feeding portion 24, the winding portion 26, and the contact head 28, respectively, and a single-sided adhesive sheet 30 that passes between them.

  The housing portion 22 has a structure that can be opened and closed in order to accommodate the single-sided adhesive sheet 30 therein or to replace the single-sided adhesive sheet 30 as necessary. For example, it is possible to use a structure in which the housing portion 22 is constituted by a case main body and a side wall plate, and the side wall plate can be opened and closed with respect to the case main body. As the casing 22, an appropriate plastic material formed into a desired shape can be used.

  The feeding unit 24 and the winding unit 26 are shaft bodies that wind up and store both end sides of the single-sided adhesive sheet 30. The feeding unit 24 and the winding unit 26 are rotatably attached to the housing unit 22. In FIG. 1, the one arranged on the lower right side of the paper surface is the feeding portion 24, and the one arranged on the upper left side is the winding portion 26, but both the feeding portion 24 and the winding portion 26 rotate around the axis. Since it is possible in both directions, the relationship between feeding and winding is reversed depending on the rotation direction.

  For example, in FIG. 1, when both the feeding unit 24 and the winding unit 26 rotate counterclockwise on the paper surface, the single-sided adhesive sheet 30 is formed on the upper left side via the contact head 28 from the lower right side. Sent. In contrast, when both the feeding unit 24 and the winding unit 26 rotate clockwise on the paper surface, the single-sided adhesive sheet 30 is sent from the upper left side to the lower right side via the contact head 28. The winding unit 26 arranged on the upper right side has a feeding function, and the feeding unit 24 arranged on the lower left side has a winding function. Thus, the feeding and winding are relative ones that change depending on the rotation direction. In this sense, both the feeding unit 24 and the winding unit 26 can be called a feeding / winding shaft.

  The feeding portion 24 and the winding portion 26 can be configured by a cylindrical shaft body having an axial length longer than the width of the single-sided adhesive sheet 30. The diameter is preferably large enough to prevent the single-sided adhesive sheet 30 from being curled. As the shaft body, one formed of an appropriate plastic material or a metal cylindrical shaft body can be used.

  The contact head 28 is a wide flat plate-like member disposed between the feeding unit 24 and the winding unit 26. The contact head 28 has an adhesive surface of the single-sided adhesive sheet 30 disposed at the tip, contacts the adhesive surface with a separator, which is a protective film to be peeled off, and adheres to the separator. It has a function to integrate. With this integrated function, the separator can be peeled from the substrate by moving the protective film peeling device 20.

  The width of the contact head 28 is set slightly longer than the width of the single-sided adhesive sheet 30. Therefore, when the contact head 28 comes into contact with the separator, integration by adhesion is performed over the entire width of the separator. The tip side of the contact head 28 is rounded with a suitably small radius. At this rounding, the single-sided adhesive sheet 30 fed out from the feeding unit 24 and taken up by the winding unit 26 is folded back, so it is preferable to set the roundness of the radius so that the single-sided adhesive sheet 30 does not break. .

  The single-sided adhesive sheet 30 is a wide sheet, and an adhesive surface is provided on one side, and the other side is a non-adhesive surface. It is preferable that the non-adhesive surface is coated with a suitable release material so that the non-adhesive surface hardly adheres even when it comes into contact with the adhesive surface of the single-sided adhesive sheet 30. Thereby, even if the single-sided adhesive sheet 30 is sequentially wound around the shaft body in the feeding unit 24 and the winding unit 26, the bonding can be hardly performed.

  The single-sided adhesive sheet 30 is fed from the feeding unit 24, folded back at the tip of the contact head 28, and taken up by the winding unit 26. At this time, at the tip of the contact head 28, the adhesive surface is set to the surface side. Thereby, the front-end | tip part of the contact head 28 becomes a part which has adhesive force, can contact the separator of peeling object, and can integrate by adhesion | attachment. The width of the single-sided adhesive sheet 30 is preferably about the same as or longer than the width of the protective film to be peeled.

  FIG. 2 is a schematic diagram for explaining the structure of the polarizing film body 10 to be inspected. The polarizing film body 10 is an optical element film body having a function of polarizing light incident from one side in a predetermined polarization mode.

  The polarizing film body 10 is disposed so as to be laminated on the outer side of the polarizer sheet 12 serving as the core, the protective sheets 13 and 14 disposed on both front and back surfaces, and the protective sheet 13 on one side. An outer sheet 15, an adhesive layer 17 provided outside the protective sheet 14 on the other side, and a separator 19 attached to the adhesive layer 17 are configured.

  In this way, the polarizing film body 10 is formed by laminating a plurality of sheets, and then cut into a predetermined shape. When these steps are finished and the completed polarizing film body 10 is obtained, it is delivered to a customer such as a liquid crystal panel manufacturer, where it is attached to an attachment object such as a liquid crystal panel. At that time, the separator 19 is peeled from the adhesive layer 17, and the polarizing film body 10 is firmly attached and fixed to the liquid crystal panel or the like through the exposed adhesive layer 17. When the liquid crystal panel with a polarizing film is completed in this way, it is sent to a store for sale by general consumers. When the user purchases a liquid crystal panel with a polarizing film body arranged at the storefront, the store removes the outer sheet 15 that has been provided for preventing scratches.

  As described above, the separator 19 and the outer sheet 15 provided on the outer sides of the front and back sides of the polarizing film body 10 are temporarily used for the purpose different from the optical performance of the polarizing film body 10. It is affixed to the outside. However, as described above, until the polarizing film body 10 is attached to the attachment object, the separator 19 circulates through the manufacturing process while being attached as constituting the polarizing film body 10, and the outer sheet 15 is sold until the sales are completed. And it distribute | circulates as it comprises as a thing which comprises the polarizing film body 10, including a distribution channel.

  Hereinafter, in the polarizing film body 10, the separator 19 is temporarily peeled off from the adhesive layer 17, and in this state, for example, a process such as inspection is performed, and then the separator 19 is reattached to the adhesive layer 17 again. Will be explained. Therefore, the polarizing film body 10 is divided into a separator 19 and other portions, and the other portions are referred to as a polarizing film substrate 18. When the polarizing film body is composed of a protective film and a substrate, the separator 19 corresponds to the protective film, and the polarizing film substrate 18 corresponds to the substrate.

  The polarizing film substrate 18 is divided into an adhesive layer 17 and other elements, but the elements other than the adhesive layer 17 are collectively referred to as a sheet laminate 16. As described above, the sheet laminate 16 is a laminate of the other protective sheet 14, the polarizer sheet 12, the one protective sheet 13, and the outer sheet 15 from the adhesive layer 17 side.

  The polarizer sheet 12 can be composed of a stretched film containing a dichroic substance such as iodine or a dye. Specifically, iodine and dye in a dye bath while transporting a film made of a suitable hydrophilic polymer such as a polyvinyl alcohol film, a partially formalized polyvinyl alcohol film, and an ethylene / vinyl acetate copolymer saponified film. The polarizer sheet 12 can be formed using a wet method of impregnating and the like. For example, the thickness of the polarizer sheet 12 is about 5 to 80 μm.

  The protective sheets 13 and 14 are transparent sheets used for improving the water resistance and handling of the polarizer sheet 12. The protective sheets 13 and 14 include polyester resins, acetate resins, polyethersulfone resins, polycarbonate resins, polyamide resins, acrylic resins, and other thermoplastic resins, acrylic resins, urethane resins, acrylic urethane resins, and epoxy resins. A thermosetting resin such as a silicone or a silicone, or a transparent sheet of an ultraviolet curable resin can be used. For example, the thickness of the protective sheets 13 and 14 is about 5 to 200 μm.

  The outer sheet 15 constitutes the polarizing film body 10 and is a transparent sheet having a function of protecting the polarizer sheet with a protective sheet from damage in the distribution path. The material of the outer sheet 15 can be the same as that of the protective sheets 13 and 14 or the same material as the separator 19 described later. For example, the thickness of the outer sheet 15 is about 5 to 200 μm.

  An adhesive layer or an adhesive layer is provided between the polarizer sheet 12 and the protective sheets 13 and 14, and an adhesive layer or an adhesive layer is also provided between the protective sheet 13 on one side and the outer sheet 15 on the outer side. . These pressure-sensitive adhesive layers or adhesive layers are for laminating sheets and have a relatively weak bonding force.

  On the other hand, the adhesive layer 17 provided on the outer surface of the protective sheet 14 on the other side has a function for attaching the sheet laminate 16 to an external attachment object such as a liquid crystal panel. Compared to the pressure-sensitive adhesive layer or adhesive layer used for lamination, it has a strong pressure-sensitive adhesive force. As such an adhesive layer, an adhesive liquid obtained by dissolving or dispersing an adhesive substance such as a natural product or a synthetic resin in a solvent composed of an appropriate solvent such as toluene or ethyl acetate, or a mixture thereof. Can be used which is developed on the surface of the protective sheet 13 by a casting method or a coating method. In addition to the adhesive substance, a filler, an antioxidant and the like can be added. The thickness of the adhesive layer 17 is 10 to 100 μm, for example.

  Thus, since the adhesive layer 17 is obtained by dissolving or dispersing an adhesive substance in a solvent, if the adhesive layer 17 is exposed to the atmosphere, the solvent evaporates and the adhesiveness decreases. Therefore, it is preferable not to be exposed to the atmosphere until it is used for attaching to an external attachment object.

  The separator 19 is a film having a function of covering the surface of the adhesive layer 17 until it is used for mounting and fixing in order to prevent a decrease in the adhesive strength of the adhesive layer 17 in which an adhesive substance is dissolved or dispersed in a solvent. is there. As the separator 19, a plastic film, rubber sheet, paper, cloth, nonwoven fabric, foamed sheet, metal foil, a laminate of these, or the like can be used. For example, the thickness of the separator 19 is 10 to 200 μm. The separator 19 may be subjected to appropriate release coating such as silicone or fluorine.

  Next, the effect | action of the protective film peeling apparatus 20 is demonstrated using FIGS. 3-5. FIGS. 3 to 5 are diagrams for sequentially explaining how the separator 19 as a protective film is peeled from the polarizing film substrate 18 as a substrate. Then, not only the separator 19 is peeled off from the polarizing film substrate 18, but also the properties of the polarizing film substrate 18 are inspected in a partially peeled state. After the inspection, the separator 19 is reattached to the polarizing film substrate 18. The situation will be explained in turn.

  3 to 5 show a series of peeling-inspection-reattachment flows, and are shown as (a) to (l) in FIGS. 3 to 5. FIGS. 3A to 3D are views showing an initial state in which the separator 19 is peeled from the polarizing film substrate 18. FIGS. 4E to 4H are views showing a state where the separator 19 is partially but sufficiently peeled and the inspection is performed in this state. (I) to (l) of FIG. 5 is a diagram showing a state in which the peeled separator 19 is reapplied after inspection and returned to the inspected polarizing film body 11 in the same state as the first.

  In these drawings, as the polarizing film body 10, a separator 19, a sheet laminate 16 and an adhesive layer 17 constituting the polarizing film substrate 18 are shown. The polarizing film body 10 is shown as being held on a suitable mounting table 63. In these drawings, the thickness is exaggerated for explanation. Moreover, in order to show a moving direction, each figure was attached | subjected and expressed clearly about the X direction and the Z direction.

  FIG. 3A is a diagram illustrating an initial state, in which the polarizing film body 10 is held on the mounting table 63 and the protective film peeling device 20 is disposed above the polarizing film body 10. The polarizing film body 10 is arranged such that the separator 19 as a protective film is on the upper surface. Here, the arrangement is performed so that the top and bottom of FIG. 2 are reversed, that is, the separator 19 is on the upper surface side in FIG. In addition, for example, there is a case where the deflecting film body 10 has a structure in which the separator is disposed on the upper surface side, different from that described in FIG. 2, but also at that time, the separator is on the upper surface side in FIG. That is, in this case, the arrangement is performed in FIG. The protective film peeling device 20 may be arranged by being manually held by an operator, or the protective film peeling device 20 may be attached to an appropriate moving mechanism. In this state, the protective film peeling apparatus 20 is not in contact with the polarizing film body 10.

  FIG. 3B shows a state where the protective film peeling device 20 is moved toward the surface of the polarizing film body 10 and the contact head 28 is pressed against the separator 19 on the upper surface of the polarizing film body 10. The moving direction of the protective film peeling apparatus 20 is the -Z direction of FIG.3 (b).

  As described above, the width of the contact head 28 is wider than the width of the single-sided adhesive sheet 30, and the width of the single-sided adhesive sheet 30 is equal to or longer than the width of the separator 19 that is the protective film to be peeled. Therefore, the tip of the contact head can be brought into contact with the entire upper surface of the separator 19 in the width direction and pressed.

  A single-sided adhesive sheet 30 is folded and hung at the front end portion of the contact head 28 with the adhesive surface as the surface side. Therefore, when the contact head 28 contacts and presses the separator 19, this adhesive surface comes into contact with the upper surface of the separator 19, whereby the contact head 28 and the separator 19 adhere to the adhesive surface of the single-sided adhesive sheet 30, Integrated.

  FIG. 3C is a diagram showing a state in which the contact head 28 is moved in the −X direction of FIG. 3C while pressing the contact head 28 against the separator 19 from the state of FIG. Here, in the longitudinal direction of the separator 19, both end portions thereof are referred to as one end portion and the other end portion, respectively. In FIG. 3C, the −X direction end portion is the one end portion, and the + direction end portion is the end portion. The other end. If it calls in this way, the movement of the contact head 28 of FIG.3 (c) is a movement from the other end part of the separator 19 toward one end part. This movement is stopped when the tip of the contact head 28 reaches the one end of the separator 19. At this time, the winding unit 26 operates in the clockwise direction on the paper surface of FIG. 3C, and the single-sided adhesive sheet 30 is fed out in synchronization with the movement of the contact head 28.

  In this movement, in FIG. 3B, the contact area between the separator 19 and the single-sided adhesive sheet 30 is the same as that in the X direction. This is to enlarge the surface and make it surface contact. Thereby, the adhesive force for integration can be increased. This is shown as an enlarged view of the periphery of the contact head 28 in FIG. Thus, in order to enlarge the contact surface area between the separator 19 and the single-sided adhesive sheet 30, the contact position in FIG. 3B is a position slightly deviated from one end of the separator 19 toward the other end. It is preferable that

  FIG. 3D shows a state where the tip of the contact head 28 in FIG. 3C is stopped when it comes to a position slightly before the one end of the separator 19, that is, slightly closer to the other end. Thus, the winding unit 26 operates counterclockwise on the paper surface, and the single-sided adhesive sheet 30 is wound up, and the protective film peeling device 20 is slightly lifted upward in synchronization therewith. . Pulling upward refers to pulling the contact head 28 away from the polarizing film substrate 18, that is, pulling it up in the direction indicated as + Z direction in FIG.

  As a result, the end of the contact head 28 is bonded by surface bonding over the entire width thereof, and one end portion of the separator 19 integrated with the contact head 28 extends over the entire width of the polarizing film substrate. Pulled up away from 18 and peeled off.

  4E, 4F, and 4G are views showing a state where the protective film peeling device 20 is further pulled upward. Here, a state in which the pressing member 40 is disposed on the upper surface of the separator 19 is shown. The pressing member 40 is a ruler-shaped member having a length capable of pressing the separator 19 over the entire width direction.

  The pressing member 40 is a member having a function of aligning the separation position of the separator 19 so that the pressing position is a boundary between the separation portion and the pasting portion of the separator 19. By using this pressing member 40, it is possible to effectively suppress the occurrence of wrinkles and deformation in the separated separator 19. In particular, considering that the separator 19 is partially peeled and then re-applied to the polarizing film substrate 18, the peeling position alignment function of the pressing member 40 works more effectively. When the separator 19 is peeled off and discarded, the arrangement of the pressing member 40 can be omitted.

  Initially, the pressing member 40 is not in contact with the polarizing film body 10. For example, it is placed on the outside of the loading table 63 and is placed so as to be pressed against the surface of the separator 19 of the polarizing film body 10 by an operator at an appropriate timing. A pressing member moving mechanism may be provided instead of setting the pressing member 40 manually by the operator. In that case, first, the pressing member 40 is pulled up above the polarizing film body 10, and the pressing member 40 can be lowered at an appropriate timing. The pressing member 40 is disposed so as to be pressed over the entire width direction of the upper surface of the separator 19 in a state where the polarizing film body 10 is still attached.

  The holding member 40 is disposed at the position of the separation boundary where it is necessary to partially peel the separator 19 in order to perform an inspection described later. That is, on the upper surface of the separator 19, it is arrange | positioned in the place of the one edge part side which is an edge part of + X direction. This position is not changed during the peeling of the separator 19. Therefore, in FIGS. 4E, 4 </ b> F, and 4 </ b> G showing how the separator 19 is peeled, the position of the pressing member 40 is the same.

  Next, on the upper surface of the separator 19, the entire width of the separator 19 is maintained until the separation position of the separator 19 is aligned so that the pressing position of the pressing member 40 becomes the boundary between the separation portion and the pasting portion of the separator 19, that is, the separation boundary. It peels from the one end side to the pressing position of the pressing member. FIGS. 4E and 4F are views showing a state in the middle of the separation of the separator 19 not reaching the position of the pressing member 40. The pressing member 40 is in a state where the state where the separator 19 is pressed is maintained in the lowered position. Then, the protective film peeling device 20 moves in the combined direction of the + Z direction and the + X direction shown in FIGS.

  In this way, the separator 19 is continuously pulled upward, and when the pressing position of the pressing member 40 becomes the boundary between the separation portion and the pasting portion of the separator 19, that is, the separation boundary, the separation of the separator 19 occurs at this pressing position. The positions can be linearly aligned in the Y direction. In this state, the occurrence of wrinkles and deformation is suppressed.

  FIG. 4G is a diagram illustrating a state where the pressing position of the pressing member 40 is a boundary between the peeling portion and the pasting portion of the separator 19. Even in this state, the pressing member 40 firmly presses the upper surface of the separator 19. That is, while the separator 19 is peeled off, the state in which the pressing member presses the upper surface of the separator 19 is maintained.

  In FIG. 4G, the separator 19 is partially peeled while the pressing member 40 is pressed on the other side of the separator 19. In this state, the movement of the protective film peeling device 20 and the pressing member 40 are moved. The movement is stopped and the state is maintained. In this state, the polarizing film substrate 18 exposed by peeling off the separator 19 can have a sufficient area for performing processing such as inspection.

  FIG. 4H is a diagram showing a state in which the polarizing film substrate 18 is inspected using the inspection device 50 arranged at a position facing the mounting table 63 in this state. For example, the polarization characteristic inspection can be performed from above the polarizing film substrate 18 using the inspection apparatus 50. Of course, in addition to this, appearance inspection, film thickness inspection, and the like can be performed.

  In this way, since the separator 19 can be peeled off and the polarizing film substrate 18 can be directly inspected, inspection items that cause a difference between the inspection result when the separator 19 is passed and the inspection result when the separator 19 is not passed, for example, polarized light The characteristics, film thickness, etc. can be sufficiently inspected. Also, in the appearance inspection, bubbles, holes, scratches, defects, etc. included in the separator 19 are excluded, so that an accurate and accurate inspection can be performed.

  When the inspection is completed, the peeled separator 19 is reattached to the polarizing film substrate 18 as it was. This is shown in FIGS. 5 (i) to (l). Each figure of FIG. 5 performs the process of peeling the separator 19 in reverse, but here, the pressing member 40 is on the upper surface of the separator 19 from the other end side toward the one end side. That is, it is moved while pressing the separator 19 in the −X direction. In synchronization with this, the protective film peeling apparatus 20 moves in the combined direction of the −X direction and the −Z direction. Thereby, the separator 19 is sequentially reattached.

  FIGS. 5 (i) and 5 (j) show the state in the middle, and FIG. 5 (k) shows that the protective film peeling device 20 is located higher than the pressing member 40, and the pressing member 40 is -X in that state. It is a figure which shows a mode that it further moved to the direction and exceeded the area | region of the separator 19 completely. In this state, the reattachment of the separator 19 is completed. At this time, the feeding part 24 and the winding part 26 are reversely rotated so that the single-sided adhesive sheet 30 is easily detached from the contact head 28, and the one-sided surface is moved from the winding part 26 side to the feeding part 24 side. The adhesive sheet 30 is rewinded. FIG. 5 (l) shows the inspected polarizing film body 11 after the reattachment of the separator 19 is completed, and this state is the same as the initial state of FIG. 3 (a).

  As described above, the re-sticking operation of the separator 19 corresponds to performing the separation operation of the separator 19 in the reverse direction while using the pressing member 40.

  That is, in the reattachment of the separator 19, as shown in FIGS. 5 (i) and 5 (j), the pressing member 40 moves in the −X direction while pressing the separator 19 and the separator of the protective film peeling device 20. The movement for pulling down 19 and returning the separator 19 to the adhesive layer 17 side is performed in synchronization. In this way, the separator 19 can be sequentially pressed and reattached to the adhesive layer 17 while suppressing the occurrence of wrinkles and deformation in the separator 19.

  Then, as shown in FIG. 5 (k), when the protective film peeling device 20 is located higher than the pressing member 40 and the pressing member 40 moves completely beyond the region of the separator 19, the entire separator 19 is This means that the polarizing film substrate 18 is firmly reattached through the adhesive layer 17. Therefore, by lifting the protective film peeling device 20 upward, that is, in the + Z direction shown in FIG. 5 (l), the tip of the contact head 28 is removed from the line contact state, and the inspected polarizing film body 11 is removed. It remains on the loading table 63. In this way, the reattachment of the separator 19 is performed.

  FIG. 6 is a diagram illustrating a configuration of a protective film peeling system 60 that can automatically perform movement driving of the protective film peeling apparatus 20 and movement driving of the pressing member 40 according to a program of the driving apparatus. The content of the protective film peeling apparatus 20 and the content of the pressing member 40 are the same as those described with reference to FIGS. FIG. 6 shows an X direction and a Z direction in order to explain the moving direction of each element.

  The protective film peeling system 60 is attached to the main body base portion 62, the mounting table 63 provided thereon, the peeling device support portion 65 provided movably on the main body base portion 62, and the peeling device support portion 65. Protective film peeling device 20 movable with respect to the loading table 63, pressing member 40 movable with respect to the loading table 63, and X direction for moving and driving the peeling device supporting portion 65 in the X direction with respect to the main body base portion 62. The movement driving unit 64, the Z direction movement driving unit 66 for moving and driving the protective film peeling device 20 in the Z direction with respect to the peeling device support unit 65, and the pressing member 40 for the loading table 63 are moved in the X direction and the Z direction. A pressing member moving drive unit 68 to be driven, an inspection device 50 provided above the loading table 63, and a control device 70 for controlling the operation of each element as a whole; They comprise constructed.

  The mounted table 63 is a table having a function of holding the polarizing film body 10 to be inspected. For holding the polarizing film body 10, a mechanism for gripping and fixing the outer periphery, a mechanism for sucking and holding an appropriate portion of the bottom surface under reduced pressure, and the like can be used. The loading table 63 is preferably composed of a transparent table. By setting it as such a structure, a test | inspection can be performed from the upper surface side of the polarizing film body 10, and a lower surface side.

  The X-direction movement drive unit 64 is an actuator having a function of moving and driving the peeling device support unit 65 along the X-direction guide unit provided in the main body base unit 62. The Z-direction movement drive unit 66 is an actuator that moves and drives the protective film peeling apparatus 20 along the Z-direction guide part provided in the peeling apparatus support part 65. Each of the X direction guide unit and the Z direction guide unit can be configured by a guide rail or the like. Further, the X-direction movement drive unit 64 and the Z-direction movement drive unit 66 can each be constituted by, for example, a linear motor or a stepping motor.

  The pressing member movement driving unit 68 includes an X driving unit that moves and drives a pressing member support that is movable along the X direction guide provided on the main body base 62, and a Z direction guide that is provided on the pressing member support. It can be divided into a Z drive part that moves and drives the pressing member along the part. That is, with the same contents as the mechanism for moving the protective film peeling device 20 in the X direction and the mechanism for moving in the Z direction, the miniaturized ones are moved in the X direction and driven in the Z direction. Can be used.

  The control device 70 includes a pressing member pressing module 72, a separator peeling module 74, and a separator reattachment module 76.

  The pressing member pressing module 72 has a function of controlling the pressing member movement drive unit 68 to move and drive the pressing member 40 and pressing the entire width of the upper surface of the polarizing film body 10 to be peeled by the pressing member 40.

  The separator peeling module 74 has been described with reference to FIGS. 3 and 4 by cooperating and driving the X-direction movement driving unit 64, the Z-direction movement driving unit 66, and the pressing member movement driving unit 68 as a whole. In the processing procedure, the protective film peeling device 20 is moved while pressing the upper surface of the separator 19 with the pressing member 40, and the separator 19 is peeled from the polarizing film substrate 18 over the entire width.

  The separator reattachment module 76 moves and drives the X-direction movement driving unit 64, the Z-direction movement driving unit 66, and the pressing member movement driving unit 68 as a whole, and thereby the processing procedure described in each drawing of FIG. Thus, the protective film peeling device 20 and the pressing member 40 are moved synchronously, and the separator 19 is reattached to the polarizing film substrate 18 over its entire width.

  The control device 70 having such a function can be configured by a computer, for example. These functions of the control device 70 can be realized by software, and specifically, a protective film peeling control program including the processing procedures described in relation to the drawings of FIGS. 3, 4, and 5 is executed. This can be achieved. Some of these functions may be configured by hardware.

In embodiment which concerns on this invention, it is a figure explaining the structure of a protective film peeling apparatus. In embodiment concerning this invention, it is a schematic diagram for demonstrating the structure of the polarizing film body which is a test object. In embodiment which concerns on this invention, it is a figure which shows the mode of the initial stage which peels a separator from a polarizing film base | substrate. In embodiment which concerns on this invention, it is a figure which shows to a mode that a separator is peeled enough, but it is test | inspected in the state, although it is partial. In embodiment which concerns on this invention, it is a figure which shows a mode that the peeled separator is affixed again after a test | inspection, and it returns to the inspected polarizing film body of the same state as the beginning. In embodiment which concerns on this invention, it is a figure explaining the structure of a protective film peeling system.

Explanation of symbols

  10, 11 Polarizing film body, 12 Polarizer sheet, 13, 14 Protective sheet, 15 Outer sheet, 16 Sheet laminate, 17 Adhesive layer, 18 Polarizing film substrate, 19 Separator, 20 Protective film peeling device, 22 Housing part, 24 feeding unit, 26 winding unit, 28 contact head, 30 single-sided adhesive sheet, 40 pressing member, 50 inspection device, 60 protective film peeling system, 62 main body base unit, 63 mounting table, 64 X-direction moving drive unit, 65 Peeling device support unit, 66 Z-direction movement drive unit, 68 holding member movement driving unit, 70 control device, 72 holding member pressing module, 74 separator peeling module, 76 separator reattachment module.

Claims (5)

A protective film peeling apparatus for peeling a protective film from a substrate on which a protective film is attached to the surface,
A feeding part that feeds the single-sided adhesive sheet in the direction orthogonal to the width over the entire width;
A winding part that winds the single-sided adhesive sheet in the direction perpendicular to the width over the entire width;
A contact head that is disposed between the feeding portion and the winding portion and extends in the width direction, and is one side that is fed from the feeding portion so that the bonding surface of the single-sided adhesive sheet is on the front side at the tip of the contact head A contact head on which the adhesive sheet is hung, folded back and returned to the winding unit;
A housing portion that holds the feeding portion, the winding portion, and the contact head;
The protective film and the contact head are bonded via the adhesive surface of the single-sided adhesive sheet by pressing the tip of the contact head against the protective film of the substrate to be peeled, and the entire housing part is removed from the protective film. A protective film peeling apparatus, wherein the protective film is peeled from a substrate by moving in a separating direction. A protective film peeling device for peeling the protective film from the substrate to which the protective film is attached to the surface;
A holding part for holding the substrate;
A peeling device moving mechanism for moving the protective film peeling device relative to the holding unit;
With
The protective film peeling device
A feeding part that feeds the single-sided adhesive sheet in the direction orthogonal to the width over the entire width;
A winding part that winds the single-sided adhesive sheet in the direction perpendicular to the width over the entire width;
A contact head that is disposed between the feeding portion and the winding portion and extends in the width direction, and is one side that is fed from the feeding portion so that the bonding surface of the single-sided adhesive sheet is on the front side at the tip of the contact head A contact head on which the adhesive sheet is hung, folded back and returned to the winding unit;
A housing portion that holds the feeding portion, the winding portion, and the contact head;
Including
By contacting and pressing the tip of the contact head against the protective film of the base held by the holding part, the protective film and the contact head are bonded via the adhesive surface of the single-sided adhesive sheet, and the protective film peeling device is attached to the base by the moving mechanism. The protective film peeling system characterized by peeling a protective film from a base | substrate by moving in the direction away from the surface of this. In the protective film peeling system of Claim 2,
The peeling device moving mechanism
The protective film peeling device is moved toward the surface of the substrate, and the contact head is contacted and pressed over the entire width of the upper surface of the protective film, and the adhesive surface of the single-sided adhesive sheet at the tip of the contact head is applied to the protective film. A peeling device first moving means for bonding;
A peeling device second moving means for moving the protective film peeling device in a direction away from the surface of the substrate and peeling the protective film from the substrate;
A protective film peeling system comprising: In the protective film peeling system of Claim 3,
A ruler-shaped pressing member having a length capable of pressing the protective film over the entire width direction;
A holding member moving mechanism for moving the holding member;
With
The holding member moving mechanism
A pressing member first moving means for moving the pressing member toward the surface of the substrate and pressing the pressing member over the entire width direction of the upper surface of the protective film;
In cooperation with the movement of the protective film peeling device by the second moving means of the peeling device, the pressing member is pressed on the other side of the protective film so that the pressing position of the pressing member becomes the boundary between the peeling portion and the pasting portion of the protective film. In addition, the protective film is partially peeled until the protective film is peeled off, and the pressing maintaining means during peeling that exposes the substrate in that state,
After maintaining the pressing during peeling, the holding member is moved in synchronization with the movement of the protective film peeling device from the other end side to the one end side along the direction orthogonal to the width direction of the substrate by the peeling device moving mechanism. Move the contact head while pressing it from the other end side to the one end side along the direction perpendicular to the width direction of the base so that the pressing position of the contact head is the boundary between the protective film application part and the peeling part. A pressing member third moving means that presses the protective film against the surface of the base and re-adheres while aligning;
A protective film peeling system comprising: In the protective film peeling system of Claim 4,
A protective film peeling system comprising a peeling state inspection device that is disposed at a position corresponding to a holding unit and inspects a substrate that is exposed as a state in which the protective film is partially peeled.

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