JP2014059378A - Release tape, liquid crystal panel including the same, and liquid crystal module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a release tape 11 capable of easily and surely releasing a protective film 109 stuck on the polarizer 107 of a liquid crystal panel 100 and achieving the releasing without affecting productivity, etc., of the liquid crystal panel 100.SOLUTION: A release tape 11 comprises an adhesive part 14 and a non-adhesive part 15. The adhesive part 14 has an adhesive strength equal to or more than an adhesive strength between the polarizer 107 and the protective film 109 of the liquid crystal panel 100 and is formed in one end part of the release tape 11 in a longitudinal direction. The non-adhesive part 15 is formed in the other end part of the release tape 11 in the longitudinal direction. The adhesive parts 14 and the non-adhesive part 15 are adjacently formed in a longitudinal direction of the release tape 11 in the shape that a part of the non-adhesive part 15 is projected in the end part of the adhesive part 14 on the side of non-adhesive part 15 and constitute the release tape 11 having a rectangular outer shape.

Description

  The present invention relates to a protective film peeling tape affixed to a polarizing plate of a liquid crystal panel, a liquid crystal panel including the same, and a liquid crystal module.

  Conventionally, a liquid crystal panel 100 is used for a clock display unit, a multi-information display unit, a navigation display unit, an audio display unit, and the like mounted on a cluster (instrument panel) of an automobile. An example of the liquid crystal panel 100 is shown in FIG. 6A is a surface view (front view), FIG. 6B is a side view, and FIG. 6C is a cross-sectional view.

  As shown in FIG. 6A, FIG. 6B, and FIG. 6C, the liquid crystal panel 100 includes a front and back transparent substrate 101, a liquid crystal material 106 sandwiched between the substrates 101, and the substrate. It is composed of two polarizing plates 107 provided on the outer side of 101. As the transparent substrate, for example, a glass substrate 101 is used. A transparent electrode 102 and an alignment film 103 are formed in this order on one surface of the glass substrate 101, and two glass substrates 101 with the alignment film 103 facing each other vertically are spaced so that the distance between the substrates is uniform. They are bonded in parallel by a seal 105 or the like with 104 interposed. Then, a liquid crystal material 106 such as a nematic liquid crystal is sealed between the substrates, and a polarizing plate 107 is attached to the outer side of the glass substrate 101. Some liquid crystal panels 100 are provided with color filters to enable color display. If necessary, the liquid crystal panel 100 includes a driving IC 201, an FPC connector 202, an FPC connector 202, and the like on the substrate 101 on the back side, as indicated by phantom lines in FIGS. 6 (A) and 6 (B). The liquid crystal module 200 is assembled by mounting the signal input / output FPC 203 or the like. In addition, a light source (backlight, sidelight, frontlight) (not shown) and the like are attached to the liquid crystal module 200 as necessary.

  The polarizing plate 107 is larger than the display area of the liquid crystal panel 100 and smaller than the glass substrate 101, and is attached to the glass substrate 101 so that the glass substrate 101 is exposed around the polarizing plate 107.

  Further, a release film (not shown) is attached to one surface (surface on the substrate side) of the polarizing plate 107 via an adhesive layer 108. This release film is peeled off when the polarizing plate 107 is attached to the glass substrate 101, and the polarizing plate 107 is attached to the glass substrate 101 by the adhesive layer 108.

  Furthermore, a transparent protective film 109 is attached to the other surface of the polarizing plate 107 (the surface opposite to the substrate) with an adhesive layer 110 interposed therebetween. The protective film 109 is for preventing the polarizing plate 107 from being scratched when the liquid crystal panel 100 is manufactured or when the liquid crystal module 200 is assembled. The completed liquid crystal panel 100 and the liquid crystal module 200 have the protective film 109 attached thereto. The protective film 109 is peeled off at the user side.

  The polarizing plate 107 has a protective film 109 attached to both the front and back surfaces for a transmissive panel, but a translucent reflector is used instead of the protective film 109 for the back surface of a transflective panel. In some cases, the reflective plate 111 is attached via the adhesive layer 112 instead of the protective film 109 for the back side of the reflective panel. FIGS. 6B and 6C show the back side of the reflective panel.

  By the way, the adhesion between the polarizing plate 107 and the protective film 109 is very strong because the adhesive force due to the differential pressure generated on both surfaces of the protective film 109 works in addition to the adhesive force by the pressure-sensitive adhesive layer 110 between them. A large force is required to peel off the film 109. However, since air can be easily put between the polarizing plate 107 and the protective film 109 at the end portion of the protective film 109, the adhesive force due to the differential pressure is lost, and more than the adhesive force by the pressure-sensitive adhesive layer 110. The protective film 109 can be peeled off if there is a force of. Then, once at least a part of the end of the protective film 109 can be peeled off, air can be continuously introduced between the polarizing plate 107 and the protective film 109 as a trigger. All of the remaining protective film 109 can be peeled off with a force greater than the adhesive force due to.

  Therefore, a pressure-sensitive adhesive tape having an adhesive force greater than that of the pressure-sensitive adhesive layer 110 between the polarizing plate 107 and the protective film 109 is widely used for peeling off the protective film 109. This adhesive tape is attached to the protective film 109 so as to include at least a part of the end of the protective film 109 after the attaching step of the polarizing plate 107 in the manufacturing process of the liquid crystal panel 100, and the completed liquid crystal panel 100. The liquid crystal module 200 is shipped with the protective film 109 and an adhesive tape attached to the protective film 109, and the user pulls the adhesive tape in a predetermined direction so that the protective film 109 is not damaged. Can be peeled off. This adhesive tape is called a release tape. As a conventional example of this release tape, a conventional release tape 1 having the structure disclosed in Patent Document 1 is shown in FIG. 7A is a side view, and FIG. 7B is a back view (back view).

  As shown in FIGS. 7 (A) and 7 (B), the release tape 1 is a sheet having a rectangular outer shape formed at the left end which is one end in the longitudinal direction (left / right direction) of the release tape 1. The adhesive shape 4 is formed of a sheet-like non-adhesive portion 5 whose outer shape is formed at the right end portion which is the other end portion in the longitudinal direction of the peeling tape 1. Specifically, the rectangular shape from the left end to the middle of the longitudinal direction (left and right direction) of the single base material (tape body) 2 having a rectangular outer shape made of a sheet-like resin film (the width is the same as the tape width and long) The pressure-sensitive adhesive layer 3 having an adhesive force stronger than the adhesive force of the pressure-sensitive adhesive layer 110 between the polarizing plate 107 and the protective film 109 is formed only on the back surface of the region of a rectangle shorter than the tape length. Thus, a sheet-like adhesive portion 4 having a rectangular outer shape is formed at the left end portion of the peeling tape 1. On the other hand, by not forming the pressure-sensitive adhesive layer 3 on the back surface of the remaining rectangle (rectangle whose width is the same as the tape width and shorter than the tape length) from the right end in the longitudinal direction of the base material 2 to the middle. A sheet-like non-adhesive portion 5 having a rectangular outer shape is formed at the right end of the release tape 1. In addition, one straight line that extends vertically between the upper and lower edges in the width direction of the release tape 1 in the middle of the release tape 1 in the longitudinal direction and forms the right edge in the longitudinal direction of the adhesive layer 3 is an adhesive. It becomes a boundary line 6 between the part 4 and the non-adhesive part 5 and appears on the back side of the peeling tape 1. FIG. 8 shows the liquid crystal panel 100 in a state where the release tape 1 is attached to the protective film 109. 8A is a front view (front view), and FIG. 8B is a cross-sectional view. 8A and 8B show the structure on the back side of the glass substrate 101 on the front side in a transparent state. Further, FIG. 8B shows an enlarged portion where the peeling tape 1 is attached.

  As shown in FIGS. 8A and 8B, the peeling tape 1 is sufficiently smaller (narrower and shorter) than the protective film 109 in consideration of economy, and, for example, one side in the longitudinal direction of the protective film 109 is used. The adhesive part 4 hangs on the right edge which is the edge of the protective film 109 and the non-adhesive part 5 protrudes from the protective film 109 to the right side through the adhesive part 4 to the right end which is one end of the protective film 109. It is pasted. In attaching the release tape 1, the boundary line 6 between the adhesive portion 4 and the non-adhesive portion 5 is aligned with the right edge of the protective film 109, and the right edge of the adhesive portion 4 is aligned with the right edge of the protective film 109. The edges may be overlapped, but for reasons described later, the adhesive film 4 is pasted with a little margin M so that the right edge of the adhesive part 4 protrudes further to the right from the right edge of the protective film 109. When the protective film 109 is peeled off on the user side, the non-adhesive portion 5 of the peeling tape 1 is pulled obliquely upward left (an angle of 150 degrees with respect to the polarizing plate 107) indicated by the arrow in FIG. Thus, the adhesive force of the adhesive layer 3 of the adhesive part 4 is stronger than the adhesive force of the adhesive layer 110 between the polarizing plate 107 and the protective film 109, and the adhesive part 4 is attached to the right edge of the protective film 109. Since it is hung, the right end of the protective film 109 can be peeled off integrally with the peeling tape 1 as shown by the phantom line in FIG. It is made to be able to peel off.

  By the way, in FIG. 6A, FIG. 6B, FIG. 6C, FIG. 8A, and FIG. 8B, the polarizing plate 107 attached to the glass substrate 101 in the correct position is shown. However, the polarizing plate 107 may be attached to the glass substrate 101 at a position slightly deviated from the correct position due to an error in each manufacturing process of the liquid crystal panel 100 (however, the amount of deviation is affixed). Tolerance that does not require correction.) FIGS. 9 and 10 show a case where the polarizing plate 107 is attached to the glass substrate 101 at a position shifted from the correct position to the right side on the attachment position side of the release tape 1. 9 shows a case where the margin M is not taken when the release tape 1 is attached, and FIG. 10 shows a case where the margin M is taken when the release tape 1 is attached. 9A and 10A are surface views (front view) corresponding to FIG. 8A, and FIGS. 9B and 10B are cross-sections corresponding to FIG. 8B. FIG. The phantom lines in FIGS. 9A and 10A indicate the correct attachment position of the polarizing plate 107.

  As shown in FIG. 9A, FIG. 9B, FIG. 10A, and FIG. 10B, when the polarizing plate 107 is pasted to the right position from the correct position, 9 (A) and FIG. 9 (B), when attaching the release tape 1, when the margin M is not taken on the right side, the right edge of the polarizing plate 107, that is, the right edge of the protective film 109 The adhesive part 4 is not applied to the protective film 109, and the protective film 109 is immediately peeled off, and the adhesive layer 3 of the adhesive part 4 adheres to the adhesive force of the adhesive layer 110 between the polarizing plate 107 and the protective film 109. Although it has a stronger adhesive force, the adhesion between the polarizing plate 107 and the protective film 109 is caused by the differential pressure generated on both surfaces of the protective film 109 in addition to the adhesive force of the pressure-sensitive adhesive layer 110 there. Because the force works, Figure 9 (B) As shown in phantom lines, the can not peel the protective film 109, there arises a problem that only the peeling tape 1 peels off. On the other hand, as shown in FIGS. 10 (A) and 10 (B), when a margin M is provided on the right side when the release tape 1 is applied, the adhesive portion 4 is hung on the right edge of the protective film. The protective film 109 can be peeled off, and the right end of the protective film 109 can be peeled off integrally with the peeling tape 1 as shown by the phantom line in FIG. As a trigger, all of the protective film 109 can be continuously peeled off.

  FIG. 11 shows a case where the polarizing plate 107 is attached to the glass substrate 101 at a position shifted from the correct position to the left side opposite to the attaching position of the peeling tape 1. FIG. 11 shows a case where a margin M is taken when the release tape 1 is attached. 11A is a front view (front view) corresponding to FIG. 8A, and FIG. 11B is a cross-sectional view corresponding to FIG. 8B. A virtual line in FIG. 11A indicates a correct attachment position of the polarizing plate 107.

  As shown in FIGS. 11 (A) and 11 (B), when the polarizing plate 107 is attached to a position shifted to the left side from the correct position, a margin M is provided on the right side when the release tape 1 is attached. Whether or not the protective film 109 is removed, the protective film 109 is not peeled off due to eliminating the trigger for the protective film 109 to be peeled off. However, as shown in FIGS. 11A and 11B, when a margin M is taken on the right side, the amount of protrusion M of the adhesive portion 4 from the protective film 109 to the right side by the margin M is set to the polarizing plate. 107, that is, the amount of protrusion α of the adhesive portion 4 from the protective film 109 to the right due to the displacement of the protective film 109 to the left side is added, so that the adhesive sticks to the right side of the protective film 109 beyond the preset margin M. Part 4 will protrude. Then, as shown in FIG. 11 (B), the adhesive part 4 protruding to the right side from the protective film 109 is in close contact with the glass substrate 101 exposed immediately below it, and becomes easy to stick. And in this state, when the peeling process of the protective film 109 is performed, the adhesive force by the adhesive layer 3 of the adhesive part 4 is also strong, and the protective film 109 cannot be peeled off. There arises a problem of lifting the module 200 itself.

Japanese Utility Model Publication No. 3-71301

  The present invention solves the problems of the conventional peeling tape described above, and can easily and reliably peel off the protective film attached to the polarizing plate of the liquid crystal panel, and can also be used to improve the productivity of the liquid crystal panel. It is an object of the present invention to provide a peeling tape that can be realized without affecting the liquid crystal panel, a liquid crystal panel including the same, and a liquid crystal module.

  The release tape according to the present invention as a means for solving the above-described problems is a protective film release tape that is provided with a polarizing plate on the outermost surface of a liquid crystal panel and is attached to the surface of the polarizing plate. The adhesive part is composed of an adhesive part and a non-adhesive part, and the adhesive part has an adhesive force greater than the adhesive force between the polarizing plate of the liquid crystal panel and the protective film, and is one of the longitudinal directions of the release tape. Formed at the end, the non-adhesive part is formed at the other end of the peeling tape in the longitudinal direction, and the adhesive part and the non-adhesive part are formed adjacent to each other in the longitudinal direction of the peeling tape. Constitutes a rectangular release tape, and the adhesive part and the non-adhesive part are formed in a shape in which a part of the non-adhesive part protrudes from the end part of the adhesive part on the non-adhesive part side The configuration.

  Further, in the release tape according to the present invention, the shape of the non-adhesive part side of the adhesive part is the shape that leaves the end part of the adhesive part on the non-adhesive part side in at least one end part in the width direction of the release tape. It is preferable that a part of the non-adhesive portion projects from an end portion. Moreover, in the shape which leaves the edge part by the side of the non-adhesive part of the said adhesive part in the both ends of the width direction of a peeling tape, a part of said non-adhesive part is located in the edge part of the non-adhesive part side of the said adhesive part It is more preferable that the is overhanged.

  According to the peeling tape according to the present invention, for example, the outer shape of the adhesive portion is formed into a concave shape having a hollow portion opened toward the non-adhesive portion side from the conventional rectangle, and the outer shape of the non-adhesive portion is After forming from a conventional rectangle to a convex shape with an overhanging part that protrudes toward the adhesive part side and fits into the indented part of the adhesive part, it is protected after the polarizing plate attaching process in the liquid crystal panel manufacturing process The protective film includes at least a part of the end of the film, the non-adhesive part protrudes from the protective film, and further, the end of the adhesive part on the non-adhesive part side protrudes from the protective film. Even if the polarizing plate is pasted to the position where the polarizing tape is shifted from the correct position to the liquid crystal panel substrate, the pasting tape is attached to the liquid crystal panel substrate. Because the adhesive force of the adhesive part is stronger than the adhesive force between the polarizing plate and the protective film, and at least a part of the edge of the protective film is applied to the adhesive part by the margin taken when the release tape is applied. When peeling the protective film 109 on the user side, by pulling the non-adhesive part of the peeling tape in a predetermined direction, it is possible to peel at least a part of the end of the protective film integrally with the peeling tape. The protective film can be easily and reliably peeled continuously as a trigger.

  Conversely, even if the polarizing plate is attached to the substrate at a position shifted from the correct position to the opposite side of the release tape, the same amount of margin as before is applied to the release tape. Even if the adhesive part is removed, the adhesive part and the non-adhesive part are formed in a shape in which a part of the non-adhesive part protrudes from the end part on the non-adhesive part side of the adhesive part. The protruding area is small compared to the conventional case, and even if the adhesive portion protruding from the protective film is adhered and stuck to the substrate exposed immediately below, the area is reduced compared to the conventional case. For this reason, when peeling the protective film on the user side, even if the adhesive part protruding from the protective film is stuck and stuck to the substrate, by pulling the non-adhesive part of the peeling tape in a predetermined direction, The attached adhesive part with a small area is not peeled off from the substrate and lifts the liquid crystal panel or liquid crystal module itself, and can be peeled off at least part of the end of the protective film together with the peeling tape, With this as a trigger, all the protective films can be continuously and reliably peeled off.

  And since the external shape of a peeling tape is the same rectangle as before, it does not change with respect to the tact and workability of an existing liquid crystal panel manufacturing process, and the above-mentioned operational effects can be obtained.

  The liquid crystal panel according to the present invention includes two transparent substrates, a liquid crystal material sandwiched between the substrates, two polarizing plates provided on the outer side of the substrate, and the above-described release tape according to the present invention. A polarizing plate is provided on the outermost surface of the liquid crystal panel, and the release tape of the protective film attached to the surface of the polarizing plate includes at least a part of an end of the protective film; and The non-adhesive part protrudes from the protective film, and further, the end of the adhesive part on the non-adhesive part side of the protective film protrudes from the protective film, and the protective film is interposed through the adhesive part. The configuration is affixed.

  A liquid crystal module according to the present invention is a liquid crystal module including the liquid crystal panel according to the present invention described above, and one of the substrates of the liquid crystal panel includes a driving IC for the liquid crystal panel, a signal input / output FPC, Is implemented.

  As described above, according to the present invention relating to the release tape, a polarizing plate is provided on the outermost surface of the liquid crystal panel, and the protective film is attached to the surface of the polarizing plate. The adhesive part has an adhesive force equal to or greater than the adhesive force between the polarizing plate of the liquid crystal panel and the protective film, and is formed at one end in the longitudinal direction of the release tape, The non-adhesive part is formed at the other end in the longitudinal direction of the release tape, the adhesive part and the non-adhesive part are formed adjacent to each other in the longitudinal direction of the release tape, and a rectangular release tape is used. Since the adhesive part and the non-adhesive part are formed in a shape in which a part of the non-adhesive part protrudes from the end part on the non-adhesive part side of the adhesive part, the polarization of the liquid crystal panel Easily remove the protective film affixed to the plate It is possible to indeed peeling, it can be achieved without affecting the productivity of the liquid crystal panel.

  In addition, according to the present invention relating to the liquid crystal panel, two transparent substrates, a liquid crystal material sandwiched between the substrates, two polarizing plates provided on the outer side of the substrate, and the peeling according to the present invention described above. A polarizing plate is provided on the outermost surface of the liquid crystal panel, and the release tape of the protective film attached to the surface of the polarizing plate is at least a part of the end of the protective film And the non-adhesive part protrudes from the protective film, and further the end of the adhesive part on the non-adhesive part side protrudes from the protective film, and the adhesive film is attached to the protective film in a state where it is removed. Since the protective film attached to the polarizing plate of the liquid crystal panel can be easily and reliably peeled off, the productivity of the liquid crystal panel, etc. It can be achieved without affecting.

  Further, according to the present invention relating to the liquid crystal module, there is provided a liquid crystal module including the liquid crystal panel according to the present invention described above, wherein one of the substrates of the liquid crystal panel has a driving IC for the liquid crystal panel and a signal input. Since the FPC for output is mounted, the protective film affixed to the polarizing plate of the liquid crystal panel can be easily and reliably peeled off, and this affects the productivity of the liquid crystal panel. Can be realized.

It is a figure which shows the peeling tape which concerns on embodiment of this invention, FIG. 1 (A) is a side view, FIG.1 (B) is a back view (back view). It is a figure which shows the liquid crystal panel of the state which affixed the peeling tape which concerns on embodiment of this invention to the protective film, FIG. 2 (A) is a surface view (front view), FIG.2 (B) is sectional drawing. is there. It is a figure which shows the case where the polarizing plate is affixed with respect to the glass substrate in the position shifted | deviated from the correct position to the right side of the affixing position side of a peeling tape, FIG. 3 (A) is FIG. 2 (A). The corresponding front view (front view) and FIG. 3B are cross-sectional views corresponding to FIG. FIG. 4A is a view showing a case where the polarizing plate is attached to the glass substrate at a position shifted from the correct position to the left side opposite to the attaching position of the release tape. FIG. ) And FIG. 4 (B) are cross-sectional views corresponding to FIG. 2 (B). It is a figure which shows the modification of the peeling tape which concerns on embodiment of this invention, FIG. 5 (A) is a back view (back view) which shows a 1st modification, FIG.5 (B) is a 2nd modification. FIG. 5C is a back view (back view) showing a third modification, and FIG. 5 (D) is a back view (back view) showing a fourth modification. 5E is a rear view (rear view) showing a fifth modification, and FIG. 5F is a rear view (rear view) showing a sixth modification. It is a figure which shows an example of a liquid crystal panel, FIG. 6 (A) is a surface view (front view), FIG.6 (B) is a side view, FIG.6 (C) is sectional drawing. It is a figure which shows the conventional peeling tape, FIG. 7 (A) is a side view, FIG.7 (B) is a back view (back view). It is a figure which shows the liquid crystal panel of the state which affixed the conventional peeling tape on the protective film, FIG. 8 (A) is a surface figure (front view), FIG.8 (B) is sectional drawing. The figure showing the case where the polarizing plate is attached to the glass substrate at a position shifted from the correct position to the right side of the attaching position side of the release tape, and no margin is provided for attaching the release tape. 9A is a front view (front view) corresponding to FIG. 8A, and FIG. 9B is a cross-sectional view corresponding to FIG. 8B. It is a case where the polarizing plate is attached to the glass substrate at a position shifted from the correct position to the right side of the release tape attachment position side, and shows a case where a margin is taken in attaching the release tape. FIG. 10A is a front view corresponding to FIG. 8A, and FIG. 10B is a cross-sectional view corresponding to FIG. 8B. This shows the case where the polarizing plate is attached to the glass substrate at a position shifted from the correct position to the left side opposite to the attachment position of the release tape, and a margin is taken for attaching the release tape. 11A is a surface view (front view) corresponding to FIG. 8A, and FIG. 11B is a cross-sectional view corresponding to FIG. 8B.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows a release tape 11 according to an embodiment of the present invention. FIG. 1A is a side view, and FIG. 1B is a back view (back view).

  In the example shown in FIG. 1 (A) and FIG. 1 (B), the outer shape of the peeling tape 11 formed at one end in the longitudinal direction (left-right direction) of the peeling tape 11 is a concave shape. The sheet-like adhesive part 14 and the non-adhesive part 15 having a convex outer shape formed at the right end, which is the other end in the longitudinal direction of the peeling tape 11, are configured. Specifically, it has one base material (tape main body) 12 whose outer shape made of a sheet-like resin film is rectangular, and is a rectangle (left and right) in the longitudinal direction (left-right direction) of the base material 12 A rectangular area whose width is the same as the tape width and whose length is shorter than the tape length is used as a reference, and the center of the right end (inner end of the tape) of the reference rectangle is cut into a square. Only on the back side, stronger than the adhesive force by the pressure-sensitive adhesive layer 110 between the polarizing plate 107 and the protective film 109 of the liquid crystal panel 100 shown in FIGS. 6 (A), 6 (B), and 6 (C). By forming the pressure-sensitive adhesive layer 13 having adhesive force, the left end portion of the release tape 11 has a two-layer structure of the substrate 12 and the pressure-sensitive adhesive layer 13, and the pressure-sensitive adhesive layer 13 is formed on the back surface side of the release tape 11. Is exposed, the outer shape is concave, and the center of the right end A sheet-like pressure-sensitive adhesive portion 14 having a single quadrangular (U-shaped) hollow portion 14a that opens toward the right side is formed. On the other hand, a rectangle (a rectangle other than the rectangular region from the left end to the middle of the base material 12) is a rectangle (a rectangle whose width is the same as the tape width and whose length is shorter than the tape length) from the right end in the longitudinal direction of the base material 12. And a rectangle corresponding to the cut shape at the center of the right end of the rectangular region from the left end to the middle of the base 12 is added to the center of the left end (tape inner end) of the reference rectangle. The adhesive layer 13 is not formed on the back surface of the convex-shaped region (region other than the concave-shaped adhesive portion 14), so that the right end portion of the release tape 11 has a single-layer structure of only the base material 12. The base material 12 is exposed on the back surface side of the peeling tape 11, the outer shape is a convex shape, and is projected from the center of the left end portion toward the left side so as to be fitted to the recessed portion 14a of the adhesive portion 14. Has a square (U-shaped) overhang 15a That a sheet-like adhesive portion 14 is formed. In addition, one square wave line constituting the right side edge in the longitudinal direction of the pressure-sensitive adhesive layer 13, that is, vertically between the upper and lower side edges in the width direction of the peeling tape 11 in the middle of the longitudinal direction of the peeling tape 11. One line that is bent in a U shape with the center of one straight line straddling toward the right side becomes a boundary line 16 between the adhesive portion 14 and the non-adhesive portion 15 and appears on the back side of the peeling tape 11. Yes.

  Thus, the peeling tape 11 is composed of the adhesive portion 14 and the non-adhesive portion 15, and the adhesive portion 14 is the polarization of the liquid crystal panel 100 shown in FIGS. 6 (A), 6 (B), and 6 (C). It has an adhesive force greater than the adhesive force between the plate 107 and the protective film 109 and is formed at one end in the longitudinal direction of the peeling tape 11, and the non-adhesive portion 15 is the other in the longitudinal direction of the peeling tape 11. The adhesive part 14 and the non-adhesive part 15 are formed adjacent to each other in the longitudinal direction of the peeling tape 11 to form a rectangular peeling tape 11. And the adhesion part 14 and the non-adhesion part 15 are formed in the shape by which a part of the non-adhesion part 15 protrudes in the edge part of the non-adhesion part 15 side (tape inner side) of the adhesion part 14. FIG. Further, the non-adhesive portion is formed at the end of the adhesive portion 14 on the non-adhesive portion 15 side in a shape that leaves the end portion on the non-adhesive portion 15 side of the adhesive portion 14 at least at one end portion in the width direction of the peeling tape 11. A part of 15 is overhanging. Furthermore, the non-adhesive part 15 is formed at the end of the adhesive part 14 on the non-adhesive part 15 side in a shape that leaves the end part on the non-adhesive part 15 side of the adhesive part 14 at both ends in the width direction of the peeling tape 11. A part of is overhanging. Furthermore, the outer shape of the adhesive part 14 is formed in a concave shape having a recess 14a that opens toward the non-adhesive part 15 side, and the outer shape of the non-adhesive part 15 sticks out by sticking toward the adhesive part 14 side. It is formed in a convex shape having an overhanging portion 15 a that fits into the recessed portion 14 a of the portion 14.

  The liquid crystal panel and the liquid crystal module provided with the release tape 11 are the liquid crystal panel 100 and the liquid crystal module 200 shown in FIGS. 6A, 6B, and 6C, and have the configuration as described above. doing. The release tape 11 is a release tape 11 of a protective film 109 provided with a polarizing plate 107 on the outermost surface of the liquid crystal panel 100, and having the configuration as described above. doing.

  Next, FIG. 2 shows the liquid crystal panel 100 with the release tape 11 attached to the protective film 109. 2A is a front view (front view), and FIG. 2B is a cross-sectional view. 2A and 2B show the structure on the back side of the front glass substrate 101 in a transparent state. Furthermore, FIG. 2 (B) shows the part where the peeling tape 11 is affixed in an enlarged state.

  The peeling tape 11 is sufficiently smaller (narrower and shorter) than the protective film 109 in consideration of economic efficiency. For example, the adhesive tape 14 is attached to the right edge serving as one edge in the longitudinal direction (horizontal direction) of the protective film 109. The protective film 109 is attached to the right end portion, which is one end portion of the protective film 109, with the adhesive portion 14 so that the non-adhesive portion 15 protrudes from the protective film 109 to the right side. Further, when the release tape 11 is attached, the right edge of the protective film 109 is not aligned with the right edge of the protective film 109 at the both ends of the boundary line 16 between the adhesive portion 14 and the non-adhesive portion 15. Is attached with a slight margin M so that the right end of the adhesive portion 14 protrudes further to the right. Then, for example, when the protective film 109 is mechanically peeled off on the user side, the non-adhesive portion 15 of the peeling tape 11 is placed on the left upper side (relative to the polarizing plate 107) indicated by the arrow in FIG. By pulling to an angle of 150 degrees, the adhesive force by the adhesive layer 13 of the adhesive portion 14 is stronger than the adhesive force by the adhesive layer 110 between the polarizing plate 107 and the protective film 109, and the right side of the protective film 109 Since the adhesive portion 14 is hung on the edge, as shown by the phantom line in FIG. 2 (B), the right end portion of the protective film 109 can be peeled together with the peeling tape 11 as a trigger. All the protective films 109 can be continuously peeled off.

  2A and 2B show the polarizing plate 107 attached to the glass substrate 101 at the correct position.

  Next, FIG. 3 shows a case where the polarizing plate 107 is attached to the glass substrate 101 at a position shifted from the correct position to the right side on the attachment position side of the release tape 11. 3A is a front view (front view) corresponding to FIG. 2A, and FIG. 3B is a cross-sectional view corresponding to FIG. 2B. The phantom line in FIG. 3A indicates the correct attachment position of the polarizing plate 107.

  As shown in FIGS. 3A and 3B, when the polarizing plate 107 is attached to the glass substrate 101 at a position shifted from the correct position to the opposite side of the attaching position of the peeling tape 11. However, when the release tape 11 is affixed, a margin M is provided on the right side, so that the adhesive film 14 can be hung on the right edge of the protective film 109 to make the protective film 109 peel off, as shown in FIG. ), The right end portion of the protective film 109 can be peeled off integrally with the peeling tape 11, and all the protective film 109 can be peeled off continuously as a trigger.

  Next, FIG. 4 shows a case where the polarizing plate 107 is attached to the glass substrate 101 at a position shifted from the correct position to the left side opposite to the attaching position of the peeling tape 11. 4A is a front view (front view) corresponding to FIG. 2A, and FIG. 4B is a cross-sectional view corresponding to FIG. 2B. The phantom line in FIG. 4A indicates the correct attachment position of the polarizing plate 107.

  As shown in FIGS. 4A and 4B, when the polarizing plate 107 is attached at a position shifted to the left side from the correct position, the margin taken on the right side when the release tape 11 is attached. The amount of protrusion M of the adhesive part 14 from the protective film 109 to the right side due to M is the amount of protrusion α of the adhesive part 14 from the protective film 109 to the right side due to the displacement of the polarizing plate 107, that is, the left side of the protective film 109. Therefore, the adhesive part 14 protrudes to the right side of the protective film 109 beyond the preset margin M. However, as can be seen from a comparison of FIGS. 4A and 4B with FIGS. 11A and 11B, the release tape 11 has a margin M of the same amount as that of the prior art. Even if it removes, since the adhesive part 14 and the non-adhesive part 15 are formed in the shape where a part of the non-adhesive part 15 protrudes in the edge part by the side of the non-adhesive part 15 of the adhesive part 14, the protective film 109 Even if the adhesive part 14 that protrudes from the protective film 109 adheres to and adheres to the glass substrate 101 exposed immediately below, the area of the adhesive part 14 that protrudes from the adhesive film 14 is less than the conventional area. Compared to less. For this reason, when the protective film 109 is peeled off on the user side, even when the adhesive portion 14 protruding from the protective film 109 is adhered and adhered to the glass substrate 101 as shown by the solid line in FIG. By pulling the non-adhesive part of the peeling tape 11 in a predetermined direction, the adhered small-sized adhesive part 14 is peeled off from the glass substrate 101 as shown by the phantom line in FIG. The right end of the protective film 109 can be peeled off without lifting the panel 100 or the liquid crystal module 200 itself, and the protective film 109 can all be easily and reliably peeled continuously as a trigger.

  As can be seen by comparing FIG. 2A and FIG. 8A, the outer shape of the release tape 11 is the same rectangular shape as the conventional one, so that the tact and workability of the existing liquid crystal panel manufacturing process are improved. On the other hand, the aforementioned effects can be obtained without causing any change.

  Therefore, according to the peeling tape 11, the protective film 109 attached to the polarizing plate 107 of the liquid crystal panel 100 can be easily and reliably peeled off, and this affects the productivity of the liquid crystal panel 100. It can be realized without affecting.

  Next, FIG. 5 shows a modification of the peeling tape 11 according to the embodiment of the present invention. 5A is a back view (rear view) showing the first modification, FIG. 5B is a back view (rear view) showing the second modification, and FIG. FIG. 5D is a rear view showing the fourth modification, and FIG. 5E is a rear view showing the fifth modification. (Back view) and FIG. 5 (F) are back views (back views) showing a sixth modification. In the peeling tapes 21 to 71 of the first to fifth modifications, a part of the non-adhesive portion protrudes from the peeling tape 11 shown in FIGS. 1 to 4 and the end of the adhesive portion on the non-adhesive portion side. Other configurations and methods of use are the same except that the shapes are different.

  In the peeling tape 21 of the first modified example shown in FIG. 5 (A), the adhesive portion 24 is a single semicircular shape that opens downward at the center of the lower end portion serving as the end portion on the non-adhesive portion 15 side. The non-adhesive part 25 has a (semi-arc-shaped) hollow part 24a, and protrudes upward from the center of the upper end part, which is the end part on the adhesive part 24 side, and engages with the hollow part 24a of the adhesive part 24. A square sine wave-like line forming the lower edge of the adhesive layer 23 in the longitudinal direction, that is, the peeling tape 21 of the peeling tape 21. In the middle of the longitudinal direction, one line that is bent in a semicircular shape in which the center of one straight line extending vertically between the upper and lower end edges in the width direction of the peeling tape 21 is opened downward, It becomes a boundary line 26 between the adhesive part 24 and the non-adhesive part 25 and appears on the back side of the peeling tape 21. Reference numeral 22 denotes a base material.

  In the peeling tape 31 of the second modified example shown in FIG. 5 (B), the adhesive portion 34 is a single triangle (opening downward) at the center of the lower end serving as the end on the non-adhesive portion 35 side. The non-adhesive portion 35 is a single piece that protrudes upward from the center of the upper end portion that is the end portion on the adhesive portion 34 side and fits with the concave portion 34a of the adhesive portion 34. The triangular tape (V-shaped) overhanging portion 35 a has a triangular wave-like line constituting the lower edge of the adhesive layer 33 in the longitudinal direction, that is, the peeling tape 31 in the middle of the peeling tape 31 in the longitudinal direction. The center of one straight line extending vertically between the upper and lower end edges in the width direction is bent into a V-shape that opens downward, and the adhesive part 34 and the non-adhesive part 35 It becomes a boundary line 36 and appears on the back side of the peeling tape 31. The code | symbol 32 is a base material.

  In the peeling tape 41 of the third modified example shown in FIG. 5C, the adhesive portion 44 has a single trapezoidal shape that opens downward at the center of the lower end portion serving as the end portion on the non-adhesive portion 45 side. The non-adhesive part 45 has a recessed part 44a, and the non-adhesive part 45 protrudes upward from the center of the upper end part serving as the end part on the adhesive part 44 side and fits with the recessed part 44a of the adhesive part 44. One of the trapezoidal wavy lines that constitute the lower edge of the adhesive layer 43 in the longitudinal direction, that is, the upper and lower ends of the release tape 41 in the width direction in the middle of the release tape 41 A single line bent in a V shape with the center of one straight line extending vertically between the edges opened downward becomes a boundary line 46 between the adhesive portion 44 and the non-adhesive portion 45, and the peeling tape 41. It appears on the back side. Reference numeral 42 denotes a base material.

  The above-described release tapes 21 to 41 have shapes in which the end portions on the non-adhesive portions 25 to 45 side of the adhesive portions 24 to 44 are left at both ends in the width direction (left-right direction) of the release tapes 21 to 41. A part of the non-adhesive portions 25 to 45 is projected at one central portion of the end portions of the adhesive portions 24 to 44 on the non-adhesive portions 25 to 45 side.

  In the peeling tape 51 of the fourth modified example shown in FIG. 5 (D), the adhesive portion 54 has a plurality of fine openings each opening downward at the center of the lower end portion serving as the end portion on the non-adhesive portion 55 side. A wide rectangular (narrow U-shaped) hollow portion 54a is provided in parallel in the width direction (left-right direction) of the peeling tape 51 with a predetermined interval, and the non-adhesive portion 55 is provided on the adhesive portion 54 side. A plurality of narrow quadrangular projecting portions 55a each projecting upward from the center of the upper end portion serving as an end portion and fitting into the respective recessed portions 54a of the adhesive portion 54 have a predetermined interval. Are provided side by side in the width direction (left-right direction) of the release tape 51, and one rectangular wave-like line constituting the lower edge of the adhesive layer 53 in the longitudinal direction, that is, the length of the release tape 51 In the middle of the direction, one straight line straddling vertically between the upper and lower edges of the width direction of the peeling tape 51 Central is large line 1 bent into a zigzag shape, the boundary line 56 becomes the adhesive portion 54 and the non-adhesive portion 55, appearing on the back side of the release tape 51. Reference numeral 52 denotes a base material. The peeling tape 51 has a shape that leaves the end of the adhesive portion 54 on the non-adhesive portion 55 side at both ends in the width direction (left-right direction) of the peeling tape 51, and the non-adhesive portion 55 side of the adhesive portion 54. A part of the non-adhesive portion 55 is overhanging at a plurality of positions in the center of the end portion.

  In the peeling tape 61 of the fifth modified example shown in FIG. 5 (E), the adhesive portion 64 is one of the widthwise direction (left and right direction) of the peeling tape 61 at the lower end that is the end on the non-adhesive portion 65 side. The right half which is an end portion has a single rectangular recess (notch portion) 64a which opens downward, and the non-adhesive portion 65 is located at the upper end portion which is an end portion on the adhesive portion 64 side. A crank shape that has a single quadrangular protruding portion 65a that protrudes upward from the right half portion and fits into the recessed portion 64a of the adhesive portion 64 and constitutes the lower end edge in the longitudinal direction of the adhesive layer 63 This one line becomes the boundary line 66 between the adhesive part 64 and the non-adhesive part 65 and appears on the back side of the peeling tape 61. Reference numeral 62 denotes a base material.

  In the peeling tape 71 of the sixth modified example shown in FIG. 5 (F), the adhesive portion 74 has a boundary line 76 between the adhesive portion 74 and the non-adhesive portion 75 at a lower end portion that is an end portion on the non-adhesive portion 75 side. , And a single right triangular depression (notch) 74a having one edge in the width direction (left-right direction) of the peeling tape 61 as one of the other two sides, The non-adhesive portion 75 has a single right-angled triangular protruding portion 75a that protrudes upward from the upper end portion that is the end portion on the adhesive portion 74 side and fits into the recessed portion 74a of the adhesive portion 74, and is an adhesive. One oblique line constituting the lower end edge of the layer 73 in the longitudinal direction, that is, one oblique line straddling between the upper and lower end edges in the width direction of the release tape 71 in the middle of the release tape 71 in the longitudinal direction. The boundary line 76 between the adhesive part 74 and the non-adhesive part 75 appears on the back side of the peeling tape 71.Reference numeral 72 denotes a base material.

  The above-described release tapes 61 and 71 have a shape that leaves the end portions on the non-adhesive portions 65 and 75 side of the adhesive portions 64 and 74 at one end portion in the width direction (left and right direction) of the release tapes 61 and 71, respectively. Part of the non-adhesive portions 65 and 75 is projected from the end portions of the adhesive portions 64 and 74 on the non-adhesive portions 65 and 75 side.

  The protective film attached to the surface of the protected member can be easily and reliably peeled off, and it is realized without affecting the productivity of the equipment with the protected member provided on the outermost surface. It can be applied for use.

DESCRIPTION OF SYMBOLS 11 Release tape 14 Adhesion part 14a Depression part 15 Non-adhesion part 15a Overhang part 100 Liquid crystal panel 101 Substrate 106 Liquid crystal material 107 Polarizing plate 109 Protection film 200 Liquid crystal module 201 Driving IC
203 FPC for signal input / output
M margin

Claims (6)

  A polarizing plate is provided on the outermost surface of the liquid crystal panel, and is a protective film peeling tape attached to the surface of the polarizing plate, which is composed of an adhesive part and a non-adhesive part, and the adhesive part is the liquid crystal panel The polarizing plate and the protective film have an adhesive force equal to or greater than the adhesive force, and are formed at one end in the longitudinal direction of the release tape, and the non-adhesive portion is the other in the longitudinal direction of the release tape. The adhesive part and the non-adhesive part are formed adjacent to each other in the longitudinal direction of the release tape, and the external shape constitutes a rectangular release tape. A peeling tape characterized in that the adhesive part and the non-adhesive part are formed in a shape in which a part of the non-adhesive part protrudes from an end part.   In the shape of leaving the end portion of the adhesive portion on the non-adhesive portion side in at least one end portion in the width direction of the release tape, a part of the non-adhesive portion is at the end portion of the adhesive portion on the non-adhesive portion side. The release tape according to claim 1, wherein the release tape is overhanged.   In a shape that leaves the non-adhesive part side end of the adhesive part at both ends in the width direction of the release tape, a part of the non-adhesive part is stretched on the non-adhesive part side end of the adhesive part. The release tape according to claim 2, wherein the release tape is provided.   The external shape of the adhesive part is formed in a concave shape having a hollow part opened toward the non-adhesive part side, and the external shape of the non-adhesive part projects toward the adhesive part side and the concave part of the adhesive part The release tape according to claim 3, wherein the release tape is formed in a convex shape having a protruding portion to be fitted.   A liquid crystal panel comprising two transparent substrates, a liquid crystal material sandwiched between the substrates, two polarizing plates provided further outside the substrate, and the release tape according to claim 1. In addition, a polarizing plate is provided on the outermost surface of the liquid crystal panel, and the release tape of the protective film attached to the surface of the polarizing plate includes at least a part of an end of the protective film, and from the protective film A non-adhesive part is protruded, and further, the end of the adhesive part on the non-adhesive part side of the protective film protrudes from the protective film, and is attached to the protective film via the adhesive part in a state where the machine is removed. A liquid crystal panel characterized by that.   6. A liquid crystal module comprising the liquid crystal panel according to claim 5, wherein a driving IC for the liquid crystal panel and a signal input / output FPC are mounted on one of the substrates of the liquid crystal panel. LCD module.

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