WO2013073247A1

WO2013073247A1 - System for continuous production of liquid crystal display elements and method for continuous production of liquid crystal display elements

Info

Publication number: WO2013073247A1
Application number: PCT/JP2012/071403
Authority: WO
Inventors: 和也秦; 智小塩; 和生北田; 宏通大橋
Original assignee: 日東電工株式会社
Priority date: 2011-11-16
Filing date: 2012-08-24
Publication date: 2013-05-23
Also published as: CN103930246A; TW201329561A; JP2013103322A; KR20140079501A

Abstract

This system for the continuous production of liquid crystal display elements is provided with a half cutting device, which, in an optical film laminate, leaves a carrier film and severs the optical film in the widthwise direction thereof to form an optical film sheet piece, and a paste-together device that pastes the sheet piece peeled from the carrier film to a liquid crystal panel, wherein the half cutting device has a blade and a pedestal facing the blade, and the pedestal has a structure resulting from layering a first pedestal section, which is proximal to the blade, and a second pedestal section, which is distal to the blade and has an elasticity that is higher than that of the first pedestal section.

Description

Liquid crystal display element continuous manufacturing system and liquid crystal display element continuous manufacturing method

The present invention is to cut the optical film in its width direction while leaving the carrier film in the optical film laminate, to form a sheet piece of the optical film, and to bond the sheet piece peeled off from the carrier film to the liquid crystal panel, The present invention relates to a liquid crystal display element continuous manufacturing system and a liquid crystal display element continuous manufacturing method.

Of the optical film laminate having a carrier film having a thickness of 10 to 50 μm and an optical film including the adhesive layer formed on the carrier film via an adhesive layer, the optical film is left leaving the carrier film. A liquid crystal display element comprising: a half-cut device (cutting means) that cuts in the width direction to form a sheet piece of the optical film; and a bonding device that bonds the sheet piece peeled off from the carrier film to a liquid crystal panel A continuous production system is known (Patent Document 1).

In addition, as a method that enables stable half-cutting, by using a flexible material with low rigidity for the pedestal, the base material sheet on the cutter side is cut, and the release sheet on the flexible material side is released to the flexible material side for cutting A half-cut method is not known (Patent Document 2).

JP 2005-37416 A JP-A-7-292816

Incidentally, in Patent Document 1, a high-quality cut surface is required for the cut surface of the sheet piece of the optical film due to the characteristics of optical use. For example, if the adhesive layer on the cut surface is deformed at the time of half-cutting, bubbles are trapped at the deformed portion when bonded to the liquid crystal panel, resulting in a point defect in the liquid crystal display element. Therefore, in the case of an optical film including an adhesive layer, not only the stability of the half cut but also the quality of the half cut (the quality of the cut surface) is important. However, this document only describes an example of a cutter used for cutting, and does not specifically mention a method of performing a half cut stably and with high quality.

In Patent Document 2, it is described that a stable half cut can be realized by adjusting the hardness of the pedestal. However, when half-cutting an optical film laminate having low rigidity, it is difficult to perform half-cut stably and with high quality only by adjusting the hardness of the pedestal. That is, if the hardness of the pedestal is low, the optical film laminate is locally deformed due to the pressing of the blade, causing chipping or dragging of the glue. Conversely, if the pedestal has a high hardness, the optical film laminate cannot escape to the pedestal side when the blade is pushed too much, causing the carrier film to break, and when the blade is not pushed sufficiently, the optical film is not cut. Insufficient glue and dragging of the glue. Further, since the hardness of the pedestal depends on its constituent material, it can only take discrete values, and its optimization is difficult.

The present invention has been made in view of the above circumstances, and is a continuous production system for a liquid crystal display element, and a continuous production method for a liquid crystal display element, capable of half-cutting an optical film laminate in a stable and high quality manner. And it aims at providing a half cut device.

As a result of intensive studies to solve the above problems, the following present invention has been completed.

The present invention provides an optical film laminate having a carrier film and an optical film including the adhesive layer formed on the carrier film via an adhesive layer, leaving the carrier film in the width of the optical film. A continuous production system of a liquid crystal display element, comprising: a half-cut device that cuts in a direction to form a sheet piece of the optical film; and a bonding device that bonds the sheet piece peeled off from the carrier film to a liquid crystal panel. And
The half-cut device has a blade and a pedestal facing the blade,
The pedestal has a structure in which a first pedestal portion that is proximal to the blade and a second pedestal portion that is distal to the blade and has an elastic modulus higher than that of the first pedestal portion are stacked. .

According to this configuration, since the layer having the low elastic modulus (the first pedestal portion) is the outermost surface on the blade side, it is possible to stably perform half-cutting without requiring high accuracy in the cutting depth of the cutter. In addition, since the second layer is a layer having a high elastic modulus (second pedestal portion), defects such as chipping and dragging can be suppressed, and high-quality half-cutting can be achieved. That is, the deformation degree of the optical film laminate at the time of cutting can be appropriately adjusted by the cooperative action of the first pedestal portion and the second pedestal portion having different elastic moduli.

The mechanism by which the effect of the present invention is manifested will be described below. 4A, 4B, and 5 show the concept of half-cut when pedestals having different elastic moduli are used. 4A and 4B, when the elastic modulus of the pedestal 212 is high (the hardness is high), the installation accuracy of the blade 201 and the shape accuracy of the blade itself (for example, roundness in the case of a round blade) immediately become the blade 201 with respect to the film. As a result, the carrier film 12 is ruptured (FIG. 4A) due to excessive cutting depth, or the optical film 13 is not cut (FIG. 4B) due to insufficient cutting. In FIG. 5, when the elastic modulus of the pedestal 211 is low (the hardness is low and soft), the optical film laminate 10 itself is excessively locally at the cutting site due to the deformation of the pedestal 211 according to the pressing of the blade 201. Deform. As described above, when the optical film laminate 10 is cut in a state where the optical film laminate 10 is locally excessively deformed, unnecessary stress is applied to the pressure-sensitive adhesive layer 131, the stability of the cut portion is lost, glue chipping or glue dragging is caused. Such as a glue failure on the cut surface. On the other hand, as shown in FIG. 1, the pedestal 21 has a two-layer structure with different elastic moduli, and the elastic modulus of the first pedestal portion 211 on the outermost surface in contact with the carrier film is a second pedestal whose second layer (lower layer) When lower than that of the portion 212, the pedestal 21 is affected by the first pedestal portion 211 having a low elastic modulus, and is affected by the second pedestal portion 212 having a high elastic modulus while having deformability. , It will not deform too much. That is, the pedestal 21 is deformed together with the optical film laminate 10 (carrier film 12) in response to the pressing of the blade 201, and is also given a repulsive force necessary to prevent local excessive deformation of the optical film laminate 10. As a result, the optical film 13 can be stably half-cut, and a clean cut surface that does not cause glue chipping or glue dragging can be formed. As described above, in the case of a single layer pedestal, it is difficult to half-cut the optical film laminate in a stable and high quality, but it is relatively easy by introducing the concept of lamination as in the present invention. Will be possible.

As an embodiment of the invention, the thickness of the first pedestal portion is 0.1 mm to 5.0 mm.

As an embodiment of the above invention, the elastic modulus of the first pedestal is 0.2 GPa to 60 GPa. The elastic modulus of the second pedestal portion is 130 GPa or more.

As an embodiment of the invention, it is preferable that a difference between an elastic modulus of the first pedestal portion and an elastic modulus of the second pedestal portion is 100 GPa or more. As a result, the above-described operational effects are further exhibited.

As an embodiment of the above invention, the blade is a round blade. Since it is difficult to process a round blade into a perfect circle, the cutting depth inevitably varies. However, according to the present invention, since the pedestal has a laminated structure, stable and high-quality half-cutting is possible even with a round blade without requiring high accuracy in the cutting depth of the blade.

As an embodiment of the above invention, the carrier film has a thickness of 20 μm to 50 μm.

In another aspect of the present invention, an optical film laminate having a carrier film and an optical film including the adhesive layer formed on the carrier film via an adhesive layer leaves the carrier film and the optical film. A continuous liquid crystal display element comprising a half-cut step of forming a sheet piece of the optical film by cutting the film in its width direction, and a bonding step of bonding the sheet piece peeled off from the carrier film to a liquid crystal panel A manufacturing method comprising:
The half-cut step includes forming the carrier on the first pedestal portion of the pedestal having a structure in which a first pedestal portion and a second pedestal portion having an elastic modulus higher than that of the first pedestal portion are stacked. The optical film laminate is disposed with the film facing the first pedestal, and the optical film is cut in the width direction while leaving the carrier film.

As an embodiment of the above invention, in the half-cutting step, a blade for cutting the optical film is a round blade. Since the pedestal has a laminated structure, stable and high-quality half-cutting is possible even with a round blade without requiring high precision in the cutting depth of the blade.

Another aspect of the present invention is a half-cut device having a blade and a pedestal facing the blade,
The pedestal has a structure in which a first pedestal portion that is proximal to the blade and a second pedestal portion that is distal to the blade and has an elastic modulus higher than that of the first pedestal portion are stacked. .

With this configuration, when a sheet piece of the optical film is formed by cutting the optical film in the width direction while leaving the carrier film, the layer having the low elastic modulus (first pedestal) is the outermost surface on the blade side Thus, half-cutting can be stably performed without requiring high accuracy in the cutting depth of the cutter. In addition, since the second layer is a layer having a high elastic modulus (second pedestal portion), defects such as chipping and dragging can be suppressed, and high-quality half-cutting can be achieved.

As an embodiment of the above invention, the blade is a round blade. Since the pedestal has a laminated structure, stable and high-quality half-cutting is possible even with a round blade without requiring high precision in the cutting depth of the blade.

Schematic which showed an example of the base of this invention. Schematic which showed an example of the manufacturing system of a liquid crystal display element. Schematic which showed an example of the cutting | disconnection by a round blade. Schematic which showed an example of the single layer base with a high elasticity modulus. Schematic which showed an example of the single layer base with a high elasticity modulus. Schematic which showed an example of the single layer base with a low elasticity modulus.

Hereinafter, the continuous manufacturing system and the continuous manufacturing method of the liquid crystal display element will be described more specifically with reference to FIGS. 1 and 2, but the present invention is not limited to the mode of the present embodiment.

The continuous production system of the liquid crystal display element of this embodiment includes an optical film laminate having a carrier film 12 and a polarizing film (optical film) 13 including the adhesive layer 132 on the carrier film 12 via an adhesive layer 132. 10, a half-cut device 20 that forms the sheet piece 135 of the polarizing film 13 by cutting the polarizing film 13 in the width direction while leaving the carrier film 12, and the sheet peeled from the carrier film 12. It is a continuous manufacturing system of a liquid crystal display element provided with the bonding apparatus 103 which bonds the piece 135 to the liquid crystal panel 4, Comprising: The said half cut apparatus 20 has the cutter 201 and the base 21 facing the said cutter 201. FIG. The pedestal 21 includes a first pedestal portion 211 proximal to the blade 201 and the blade 201. A second pedestal 212 having a position a and and high modulus of elasticity than the elastic modulus of the first seat portion are laminated.

For example, the polarizing film 13 is generally composed of a polarizer film (thickness of about 10 to 30 μm) and a polarizer protective film (thickness of about 20 to 80 μm) on one or both sides of the polarizer film. Or it is formed with an adhesive. The optical film is not limited to a polarizing film that requires a polarizer film, and may be a film having other optical characteristics (for example, a retardation film, a viewing angle compensation film, a brightness enhancement film, etc.), and a plurality of types are laminated. It may be a laminated structure. In the present embodiment, the polarizing film 13 may include a surface protective film, a retardation film, a brightness enhancement film, and the like.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 132 is not particularly limited, and examples thereof include an acrylic pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, and a urethane pressure-sensitive adhesive. The thickness of the adhesive layer 132 is, for example, 10 to 40 μm.

As the carrier film, a conventionally known film such as a plastic film (for example, a polyethylene terephthalate film, a polyolefin film, etc.) can be used. In addition, if necessary, an appropriate material according to the prior art such as a silicone-based, long-chain alkyl-based, fluorine-based or molybdenum sulfide-coated material may be used. The carrier film 12 preferably has a thickness of 20 μm to 50 μm.

The thickness of the optical film laminate is, for example, in the range of 50 μm to 400 μm. The rigidity per 1 mm width of the optical film laminate is, for example, 0.1 to 50 N · mm ² . Incidentally, the rigidity of the optical film laminate (N · mm ^2), the elastic modulus E (MPa), the width b (mm), the thickness when the h (mm), with E × b × ^h 3/12 Calculated.

(Continuous roll)
The continuous roll 1 includes an optical film including a carrier film 12 and a polarizing film 13 (including the adhesive layer 132) having an absorption axis parallel to the feeding direction (longitudinal direction) formed on the carrier film 12 via the adhesive layer 132. The film laminate 10 is rolled up. An example of the cross section of the laminated structure of the optical film laminated body 10 is shown in FIG.2 (b).

(Liquid crystal display element)
In the liquid crystal display element, at least a sheet piece of a polarizing film is formed on one side or both sides of a liquid crystal panel, and a drive circuit is incorporated as necessary. As the liquid crystal panel, for example, an arbitrary type such as a vertical alignment (VA) type or an in-plane switching (IPS) type can be used. The liquid crystal panel 4 shown in FIG. 2 has a configuration in which a liquid crystal layer is sealed between a pair of opposed substrates.

The continuous manufacturing system of a liquid crystal display element is a sheet piece laminating apparatus 100 having a film transport unit 101, a liquid crystal panel transport unit 102, a laminating device 103 (a pasting roll 50a, a drive roll 50b), and a liquid crystal panel transport unit 104. Is provided. The sheet piece laminating apparatus 100 laminates a polarizing film sheet piece 135 on one surface of the liquid crystal panel 4. The continuous production system for liquid crystal display elements may further include another sheet piece laminating apparatus (not shown), whereby a sheet piece of a polarizing film may be attached to the other surface of the liquid crystal panel and laminated. Another sheet piece laminating apparatus may have the same configuration as the sheet piece laminating apparatus 100.

The film conveyance unit 101 cuts the long polarizing film 13 including the adhesive 132 while feeding the optical film laminate 10 from the continuous roll 1 to form a polarizing film sheet piece 135, and the sheet from the carrier film 12. The piece 135 is peeled off and supplied to the bonding apparatus 103. Therefore, the film transport apparatus 101 includes a feeding unit 101a, a plurality of transport units 101b, a half-cut device 20, a dancer roll 30, a peeling unit 40, and a winding unit 60.

The continuous roll 1 is installed in the supply unit 101a, and the optical film laminate 10 is supplied from the continuous roll 1.

The plurality of transport units 101b are installed so as to transport the optical film laminate 10 by applying tension to the optical film laminate 10.

The half-cut device 20 includes a blade 201 and a base 21 that faces the blade 201. The optical film laminate 10 is fixed from the carrier film 12 side by the pedestal 21, and the polarizing film 13 is cut in the width direction to form a polarizing film sheet piece 135 (including an adhesive layer) on the carrier film 12. .

Examples of the blade 20 include a Thomson blade, a cutter blade, and a round blade (including a fixed type and a rotation type), and a round blade is preferable. A round blade has a longer blade life and less frequent replacement than a cutter blade that cuts at a fixed position because the cutting surface moves. In order to avoid imprints on the surface of the low elastic layer (the pedestal outermost surface), it is preferable to use a round blade rather than a cutter blade. Traces are less likely to remain, making it suitable for high-speed continuous processing of cutting (and thus high-speed continuous production of liquid crystal display elements).

The blade diameter and roundness of the round blade are appropriately adjusted depending on the thickness of the optical film laminate, etc., but usually the blade diameter is 30 mm to 120 mm and the roundness is 50 μm or less. When the blade is a cutter blade or a round blade, the half-cut device 20 normally further includes a slide mechanism that slides the blade in the width direction of the optical film laminate 10.

(pedestal)
The pedestal 21 has a two-layer structure of a first pedestal portion 211 having low elasticity and a second pedestal portion 212 having higher elasticity than the first pedestal portion 211. Each of the first pedestal portion 211 and the second pedestal portion 212 may have a single layer structure or a laminated structure. The thickness of the first pedestal 211 is, for example, 0.1 mm to 5.0 mm, preferably 0.2 mm to 3.0 mm, and more preferably 0.3 mm to 1.0 mm. If the thickness is less than 0.1 mm, the first pedestal 211 does not contribute, and the carrier film 12 may be broken or the polarizing film 13 may be uncut. When the thickness exceeds 5.0 mm, the second pedestal portion 212 does not contribute (appropriate repulsive force cannot be obtained), and due to local and excessive deformation of the optical film laminate 10 at the time of cutting, there is no glue or glue. There is a risk of dragging. Further, the elastic modulus of the first pedestal portion 211 (in the case of a laminated structure, all layers constituting it) is preferably 0.2 GPa to 60 GPa, more preferably 1.0 GPa to 50 GPa. If the modulus of elasticity is less than 0.2 GPa, it may be too soft to cause adhesive chipping or adhesive residue. If the elastic modulus exceeds 60 GPa, the film is too hard and the polarizing film 13 may not be cut or the carrier film 12 may be broken. Examples of the material of the first base portion 211 having low elasticity include aluminum, nitrile rubber, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinyl acetate, Teflon (registered trademark), ABS resin, acrylic resin, and the like. .

The elastic modulus of the second pedestal portion 212 (all layers constituting it in the case of a laminated structure) having higher elasticity than the first pedestal portion 211 is preferably 130 GPa or more, more preferably 150 GPa or more. If the elastic modulus is less than 130 GPa, there is a possibility that adhesive chipping or adhesive residue may occur. Examples of the material of the highly elastic second pedestal 212 include steel such as stainless steel.

The difference between the elastic modulus of the first pedestal portion 211 and the elastic modulus of the second pedestal portion 212 is preferably 100 GPa or more, and more preferably 150 GPa or more.

The lamination method of the first pedestal portion 211 and the second pedestal portion 212 is not particularly limited, and examples thereof include fusion, adhesive, adhesive, and adhesive tape stopper.

FIG. 3 shows an example of the half-cut device 20. The half-cut device 20 includes a pedestal 21 and a blade 202. Both ends of the pedestal 21 are supported by the side support portions 214 and are set apart from the device mount 215. The pedestal 21 has a first pedestal portion 211 and a second pedestal portion 212. The first pedestal 211 is attached to the second pedestal 212 with a tape 213. The

clamps

23 and 24 are waiting at the original position (not shown). At the time of cutting, as shown in FIG. 3, the

clamps

23 and 24 move from the original position to the left in FIG. 3, and press the optical film laminate 10 against the surface 211 a of the first pedestal portion 211. In this state, the round blade 202 waiting in its original position (not shown) moves in the direction of arrow A while half-cutting the optical film laminate 10 (the carrier film 12 is left without being cut, and the polarizing film 13). Next, the

clamps

23 and 24 move to the right side in FIG. 3 (return to the original position), and stop pressing the optical film laminate 10 against the surface 211a of the first pedestal 211. The round blade 202 also returns to the original position and waits for the next half-cut process. And the optical film laminated body 10 is moved a predetermined distance, and the next half cut process is performed.

The dancer roll 30 has a function of maintaining the tension of the carrier film 12.

The peeling part 40 is folded with the carrier film 12 facing inward at the tip, and the sheet piece 135 of the polarizing film is peeled off from the carrier film 12. In the present embodiment, a sharp knife edge portion is used as the tip portion as the peeling portion 40, but is not limited thereto.

The winding unit 60 winds up the carrier film 12 from which the sheet piece 135 of the polarizing film has been peeled off.

The laminating apparatus 102 affixes the sheet piece 135 from which the carrier film 12 has been peeled off by the peeling unit 40 from the upper side of the liquid crystal panel 4 conveyed by the conveying apparatus 80 via the adhesive layer 132. In this embodiment, the bonding apparatus 102 is comprised by the sticking roller 50a and the drive roller 50b.

The conveyance device 80 is a series of conveyance devices that convey the liquid crystal panel 4 and the liquid crystal display element Y in which a sheet piece of a polarizing film is attached to one side or both sides of the liquid crystal panel 4. The transport device 80 includes, for example, a transport roller 81, a suction plate, and the like.

In order to attach a sheet piece of another polarizing film to the other surface of the liquid crystal panel 4, the sheet piece laminating apparatus 100 described above can be used.

(Continuous manufacturing method for liquid crystal display elements)
The continuous manufacturing method of the liquid crystal display element includes the carrier film 12 and the optical film laminate 10 including the polarizing film 13 including the adhesive layer 132 formed on the carrier film 12 via the adhesive layer 132. A half-cut step of forming the sheet piece 135 of the polarizing film 13 by cutting the polarizing film 13 in the width direction while leaving the carrier film 12, and the sheet piece 135 peeled from the carrier film 12 as the liquid crystal panel 4 And a pasting step of pasting together. In the half-cut process, the first pedestal portion 211 of the pedestal 21 having a structure in which the first pedestal portion 211 and the second pedestal portion 212 having an elastic modulus higher than the elastic modulus of the first pedestal portion 211 are stacked. It is a step of disposing the optical film laminate 10 with the carrier film 12 on the first pedestal portion 211 side and cutting the optical film 13 in the width direction while leaving the carrier film 12.

(Another embodiment)
In this embodiment, although the sheet piece 135 of a polarizing film is affixed from the upper side of a liquid crystal panel, it is not restricted to this, You may affix the sheet piece 135 from the lower side of a liquid crystal panel.

In this embodiment, the long polarizing film fed from the continuous roll is cut at a predetermined interval, but the present invention is not particularly limited to this configuration. For example, a long optical film laminate fed out from a continuous roll may be inspected for defects and cut (so-called skip cut) so as to avoid the defects based on the inspection results. Moreover, when the mark which shows a fault position is previously attached | subjected to the elongate polarizing film, this mark may be read and it may cut | disconnect so that a fault may be avoided based on the said mark.

In this embodiment, the long polarizing film has an absorption axis parallel to the longitudinal direction, but the absorption axis direction of the long polarizing film is not limited to this. For example, the long polarizing film 13 may have an absorption axis parallel to the short direction (width direction), and another long polarizing film may have an absorption axis parallel to the longitudinal direction.

In the embodiment, the apparatus configuration shown in FIGS. 2 and 3 is used. The presence or absence of breakage when the optical film laminate 10 having the long polarizing film 13 and the carrier film 12 was half-cut with the half-cut device 20 and the quality of the half-cut (glue chipping, glue dragging) were evaluated. VEGQ 1784CUAG150 (width 400 mm, rigidity per mm width 8.5 N · mm ² , thickness 273 μm) was used as the long optical film laminate 10. The long optical film laminate 10 has a long polarizing film (thickness 235 μm) containing an adhesive (thickness 23 μm) and a PET film (thickness 38 μm) as a carrier film.

A round blade (roundness 30 μm, blade diameter 100 mm) was used as the blade. Evaluation was performed under various conditions in which the material of the pedestal (the first pedestal portion having low elasticity and the second pedestal portion having higher elasticity than that) and the thickness of the first pedestal portion were changed. The elastic modulus was measured using SAICAS manufactured by Daipura Wintes Co., Ltd. The measurement conditions were an indentation speed of 0.05 μm / sec and an indentation of 2 μm vertically. A curved indenter having a curvature radius of 0.04 mm was used as the indenter.

For the pedestal of Example 1, 0.5 mm thick polyethylene (PE) was used for the first pedestal, and 30 mm thick stainless steel (SUS) was used for the second pedestal.

The base of Example 2 is the same as Example 1 except that polyethylene (PE) having a thickness of 3 mm is used for the first base part.

The pedestal of Example 3 is the same as Example 1 except that aluminum (AL) is used for the second pedestal.

Example 4 The pedestal of Example 4 is the same as Example 1 except that aluminum (AL) having a thickness of 1.0 mm is used for the first pedestal.

Example 5 The pedestal of Example 5 is the same as Example 1 except that polystyrene (PS) having a thickness of 0.5 mm is used for the first pedestal.

The base of Comparative Example 1 was a single layer stainless steel (SUS) having a thickness of 30 mm.

The pedestal of Comparative Example 2 was a single layer of 30 mm thick polyethylene (PE).

In each of Examples 1 to 4 and Comparative Examples 1 and 2, the long polarizing film was half-cut to form 300 sheet pieces on the carrier film. The breakage of the carrier film and the quality of half-cut (glue chipping, glue dragging) were visually confirmed. The results are shown in Table 1. In the evaluation of the cut quality, “◯” is given if the number of sheets judged to be defective is “0”, “Δ” if it is 1 to 5, and “x” if it is 6 or more.

From the results of Table 1, the single layer pedestal as in Comparative Examples 1 and 2 had poor cut quality, and the stainless steel single layer pedestal in Comparative Example 1 sometimes caused the carrier film to break. On the other hand, Examples 1, 2, and 5 were all free from breakage of the carrier film and had good half-cut quality. In Examples 3 and 4, the carrier film was not broken, but the quality of the half cut was slightly lowered as compared with Examples 1, 2 and 5.

DESCRIPTION OF SYMBOLS 4 Liquid crystal panel 10 Optical film laminated body 12 Carrier film 13 Polarizing film 132 Adhesive layer 135 Sheet piece 20 of polarizing film Half-cut device 201 Cutlery 202 Round blade 203 Cutter blade 21 Base 211 First base part 212 Second base part 103 Bonding Device Y Liquid crystal display element

Claims

Of the optical film laminate having a carrier film and an optical film including the adhesive layer formed on the carrier film via an adhesive layer, the optical film is cut in the width direction while leaving the carrier film. A continuous production system of a liquid crystal display element comprising a half-cut device for forming a sheet piece of the optical film and a bonding device for bonding the sheet piece peeled off from the carrier film to a liquid crystal panel,
The half-cut device has a blade and a pedestal facing the blade,
The pedestal has a structure in which a first pedestal portion that is proximal to the blade and a second pedestal portion that is distal to the blade and has an elastic modulus higher than that of the first pedestal portion are stacked. , Continuous production system for liquid crystal display elements.
The continuous manufacturing system of a liquid crystal display element according to claim 1, wherein the thickness of the first pedestal portion is 0.1 mm to 5.0 mm.
The continuous production system of a liquid crystal display element according to claim 1 or 2, wherein an elastic modulus of the first pedestal portion is 0.2 GPa to 60 GPa.
The continuous manufacturing system of a liquid crystal display element according to any one of claims 1 to 3, wherein the elastic modulus of the second pedestal portion is 130 GPa or more.
The continuous manufacturing system of a liquid crystal display element according to any one of claims 1 to 4, wherein a difference between an elastic modulus of the first pedestal portion and an elastic modulus of the second pedestal portion is 100 GPa or more.
The continuous production system of a liquid crystal display element according to any one of claims 1 to 5, wherein the blade is a round blade.
The liquid crystal display element continuous manufacturing system according to any one of claims 1 to 6, wherein the carrier film has a thickness of 20 袖 m to 50 袖 m.
Of the optical film laminate having a carrier film and an optical film including the adhesive layer formed on the carrier film via an adhesive layer, the optical film is cut in the width direction while leaving the carrier film. A method for continuously producing a liquid crystal display element, comprising: a half-cut process for forming a sheet piece of the optical film; and a bonding process for bonding the sheet piece peeled off from the carrier film to a liquid crystal panel,
The half-cut step includes forming the carrier on the first pedestal portion of the pedestal having a structure in which a first pedestal portion and a second pedestal portion having an elastic modulus higher than that of the first pedestal portion are stacked. A continuous manufacturing method of a liquid crystal display device, which is a step of disposing the optical film laminate with the film facing the first pedestal, and cutting the optical film in the width direction while leaving the carrier film.
A half-cut device having a blade and a pedestal facing the blade,
The pedestal has a structure in which a first pedestal portion that is proximal to the blade and a second pedestal portion that is distal to the blade and has an elastic modulus higher than that of the first pedestal portion are stacked. , Half-cut device.