TWI715592B - Manufacturing method of laminated optical film, manufacturing apparatus of laminated optical film, and peeling method of peeling film - Google Patents

Abstract

The manufacturing method of the laminated optical film of one embodiment includes the steps of: conveying the optical film so that the direction of the first imaginary plane P1 orthogonal to the width direction of the optical film 11 is fixed; The second imaginary plane P2 that is orthogonal to the first imaginary plane crosses the protective film; the width direction of the protective film is consistent with the normal direction of the first imaginary plane, and the conveying direction of the protective film Make changes; and continuously bond the protective film whose conveying direction has been changed and the conveyed optical film so that their longitudinal directions coincide with each other to form a laminated optical film 10 in which the optical film and the protective film are laminated .

Description

Manufacturing method of laminated optical film, manufacturing device of laminated optical film, and peeling method of peeling film

The present invention relates to a manufacturing method of a laminated optical film, and also relates to a manufacturing device of a laminated optical film and a peeling method of a release film.

As a laminated optical film, for example, a polarizing plate formed by bonding a protective film to protect a polarizing film as an optical film to the polarizing film, or a protection to protect a polarizing plate or retardation film as an optical film is known A film (for example, a protective film) is laminated to the polarizing plate or retardation film.

In this way, when a protective film is laminated in the thickness direction of the optical film to produce a laminated optical film, the transport mechanism of the optical film and the transport mechanism of the protective film (for example, protective film) are arranged side by side in the vertical direction (see Patent Literature 1). Furthermore, the optical film and the protective film are conveyed in the same direction, and the optical film and the protective film are laminated on the other side, thereby manufacturing a laminated optical film formed by bonding. Also, for example, when the release film is peeled from the optical film to which the release film is bonded, the transport mechanism of the optical film and the transport mechanism of the release film peeled from the optical film are also arranged side by side in the vertical direction.

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2012-181276

However, in the prior art, when the device for manufacturing the laminated optical film or the device for peeling the release film from the optical film is installed in the factory, the freedom of the device layout is reduced, and sometimes the factory space cannot be effectively utilized.

Therefore, the object of the present invention is to provide a technology that can effectively utilize the factory space when laminating a plurality of films or peeling the peeling film from an optical film with a peeling film.

A method of manufacturing a laminated optical film according to one aspect of the present invention includes: an optical film conveying step of conveying the strip-shaped optical film in a manner that fixes the direction of the first imaginary plane orthogonal to the width direction of the optical film; 1 protective film conveying step, which conveys a strip-shaped protective film such that the second imaginary plane orthogonal to the width direction of the protective film crosses the first imaginary plane; the first protective film conveying direction changing step, which protects The width direction of the film is consistent with the normal direction of the first imaginary plane, the conveying direction of the protective film from the first protective film conveying step is changed; and the laminating step, which will be conveyed on the first protective film The protective film whose conveying direction is changed in the direction changing step, and the optical film conveyed in the optical film conveying step are continuously bonded so that their longitudinal directions are aligned to form a tape formed by bonding the optical film and the protective film Lamination optical film in shape.

In the above-mentioned manufacturing method, the strip-shaped optical film is conveyed so that the direction of the first imaginary plane orthogonal to the width direction of the strip-shaped optical film is fixed. On the other hand, the belt-shaped protective film is conveyed so that the second imaginary plane orthogonal to the width direction of the belt-shaped protective film crosses the first imaginary plane, and the width direction of the protective film is aligned with the first virtual plane. Change the conveying direction of the protective film from the conveying method by the way that the normal direction of the plane is consistent. After that, the protective film and the optical film whose conveying direction has been changed are continuously bonded so that their longitudinal directions coincide with each other to form a tape-shaped bonded optical film formed by bonding the optical film and the protective film. In this way, since the orientation of the conveyance direction of the protective film is changed, the degree of freedom of the layout of the manufacturing device when manufacturing the laminated optical film is improved. As a result, it can be effectively flexible Use the factory space of the installation device.

In one embodiment, in the first protective film transport direction change step, the transport direction of the protective film can be changed by winding the protective film around a roller rotating around the following axis, which is the same as the first 1 The axis of the direction in which the width direction of the protective film intersects in the protective film transport step.

In one embodiment, in the first protective film transport step, the protective film may be transported in a state where the strip-shaped release film is peelably attached to the protective film, and in the first protective film transport direction change step, With the release film attached to the protective film, change the transport direction of the protective film. In addition, it may further include: a peeling step of continuously peeling the peeling film from the protective film whose conveying direction has been changed in the first protective film conveying direction changing step; and a peeling film conveying step of making the width direction of the peeling film The peeling film peeled off in the peeling step is transported in a manner consistent with the normal direction of the first imaginary plane; and in the bonding step, the protective film from which the peeling film has been peeled is bonded to the optical film.

In one embodiment, in the bonding step, the protective film may be pasted so that the release film is located on the opposite side to the optical film in a state where the protective film is peelably bonded to the strip-shaped release film To the optical film, the manufacturing method of the above-mentioned laminated optical film further includes: a laminated optical film conveying step, which conveys the laminated optical film so that the width direction of the laminated optical film coincides with the normal direction of the first virtual plane The laminating optical film formed in the step; the peeling step, which peels the peeling film from the laminating optical film conveyed in the laminating optical film conveying step; and the peeling film conveying step, which makes the width direction of the peeling film and the first The normal direction of the imaginary plane is the same, and the peeling film peeled in the peeling step is transported.

In the step of changing the conveying direction of the first protective film, the protective film may be such that the surface of the two sides of the protective film on the side where the release film is attached is in the state where the release film is attached, and the following The axis is the center and the rotating roller is in contact with the roller, thereby changing the conveying direction of the protective film. The above-mentioned axis is the axis that intersects the width direction of the protective film in the first protective film conveying step .

In the above-mentioned form, the conveyance direction of a protective film can be changed using a roller. The release film peeled from the protective film is in contact with the roller. Therefore, even if the release film is damaged due to load or friction when changing the conveying direction, it will not affect the optical properties of the laminated optical film.

It may further include a peeling film conveying direction changing step that changes the conveying direction of the peeling film from the peeling film conveying step to a direction crossing the first imaginary plane.

It is also possible to change the conveying direction of the release film by winding the release film on a roller rotating around the following axis, which is the same as the release film conveying step. The axis of the direction where the width direction of the film crosses.

In the bonding step of one embodiment, the protective film may be bonded to the optical film in a peelable manner.

In the above case, for example, when the optical film is bonded to another member and used, after bonding the bonded optical film to the other member, the protective film may be peeled from the bonded optical film. Thereby, the optical film can be protected by the protective film until the optical film is bonded to other members and the like.

In one embodiment, in the bonding step, a band-shaped second protective film different from the protective film may be bonded to the surface of the optical film opposite to the surface to which the protective film is bonded.

In one embodiment, in the bonding step, the protective film may be peelably bonded to the optical film, and a tape-shaped second protective film different from the protective film may be bonded to the optical film. The surface opposite to the protective film is used to obtain a bonded optical film in a state where the second protective film is bonded. The manufacturing method of the above-mentioned bonded optical film further includes: a bonding optical film transport step, which enables the bonding Transport the obtained laminated optical film in such a way that the width direction of the laminated optical film coincides with the normal direction of the first imaginary plane; the peeling step, which peels off the protective film from the laminated optical film transported in the laminated optical film transport step ; And the second protective film transport step, which makes the width direction of the protective film consistent with the normal direction of the first imaginary plane The protective film that is peeled off in the peeling step is conveyed in a simple manner.

It may further include a second protective film conveying direction changing step, which changes the conveying direction of the protective film from the second protective film conveying step to a direction crossing the first imaginary plane .

In the second protective film transport step, the transport direction of the protective film can be changed by winding the protective film around a roller rotating around the following axis, which is the same as the second protective film transport step. The axis of the cross direction of the width direction of the protective film.

The manufacturing method of the laminated optical film of another aspect of the present invention includes: an optical film conveying step of conveying the strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; and protective film conveying Step, in the state where the strip-shaped release film is peelably attached, transport the strip-shaped protective film in such a way that the width direction of the protective film is consistent with the normal direction of the above-mentioned imaginary plane; the peeling step, which is continuous The peeling film is peeled from the protective film; the peeling film conveying step, which conveys the peeling film peeled in the peeling step so that the width direction of the peeling film is consistent with the above normal direction; the peeling film conveying direction change step, it will be peeled The conveying direction of the peeling film from the film conveying step is changed to the direction that intersects the above-mentioned imaginary plane; and the laminating step, which makes the mutual length directions consistent, and the protective film conveyed in the protective film conveying step , Bonding with the optical film conveyed in the optical film conveying step to form a tape-shaped laminated optical film formed by bonding the optical film and the protective film, and the peeling step is implemented before or after the bonding step.

In the above-mentioned manufacturing method, the strip-shaped optical film is conveyed so that the direction of the imaginary plane orthogonal to the width direction of the strip-shaped optical film is fixed. In addition, in a state where the strip-shaped release film is peelably attached, the strip-shaped protective film is conveyed so that the width direction of the protective film coincides with the normal direction of the imaginary plane. The optical film and the protective film conveyed in the above manner are bonded together. Before or after bonding the optical film and the protective film, the release film is peeled from the protective film. Thereby, the manufactured laminated optical film is a film in which an optical film and a protective film were bonded, and a peeling film was not included. In the above manufacturing method, the peeled film is transported The direction is changed to the direction intersecting the above imaginary plane. Thereby, the degree of freedom of the layout of the manufacturing device when manufacturing the laminated optical film is improved. As a result, it is possible to effectively utilize the plant space where the device is installed.

In a form in which the peeling step is performed before the bonding step, in the bonding step, the protective film after the peeling film is peeled in the peeling step may be bonded to the optical film.

In the form where the peeling step is performed after the bonding step, in the bonding step, the protective film may be bonded with the peeling film so that the release film is located on the opposite side of the optical film In the optical film, in the peeling step, the peeling film is peeled from the bonded optical film formed in the bonding step.

It is also possible to change the conveying direction of the release film by winding the release film on a roller rotating around the following axis, which is the release film in the release film conveying step The axis of the direction crossing the width direction.

In the bonding step of one embodiment, the protective film may be bonded to the optical film in a peelable manner.

In the above case, for example, when the optical film is bonded to another member and used, after bonding the bonded optical film to the other member, the protective film may be peeled from the bonded optical film. Thereby, the optical film can be protected by the protective film until the optical film is bonded to other members and the like.

In one embodiment, in the bonding step, a band-shaped second protective film different from the protective film may be bonded to the surface of the optical film opposite to the surface to which the protective film is bonded.

A method of manufacturing a laminated optical film according to another aspect of the present invention includes: an optical film conveying step of conveying the strip-shaped optical film in a manner such that the direction of an imaginary plane orthogonal to the width direction of the optical film is fixed; The peeling film conveying step is to convey the strip-shaped peeling film in such a way that the width direction of the peeling film is consistent with the normal direction of the imaginary plane; the protective film conveying step is to make the width direction of the protective film consistent with the above normal direction The belt-shaped protective film is conveyed by the method; the laminating step is to make the mutual length direction consistent and use the peeling film and protection The optical film is sandwiched by the film, the optical film, the release film, and the protective film are bonded together to form a laminated optical film; the laminated optical film transport step is to make the width direction of the laminated optical film consistent with the above-mentioned normal direction The method of transporting the laminated optical film formed in the bonding step; the peeling step, which peels the release film from the laminated optical film transported in the bonding optical film transport step; the second release film transport step, which causes the release film to The peeling film that is peeled off in the peeling step is transported in a way that the width direction is consistent with the above normal direction; and the peeling film transport direction is changed step, which will change the transport direction of the peeling film from the second peeling film transport step to match the imaginary The direction where the plane crosses.

In the above-mentioned manufacturing method, the strip-shaped optical film is conveyed so that the direction of the imaginary plane orthogonal to the width direction of the strip-shaped optical film is fixed. In addition, the strip-shaped release film and the protective film are conveyed so that the width direction of the strip-shaped release film and the protective film coincides with the normal direction of the imaginary plane. The optical film, the release film, and the protective film conveyed in the above manner are bonded together to form a bonded optical film by sandwiching the optical film with the protective film and the release film. After that, the release film was peeled off from the bonded optical film. Thereby, a bonded optical film in which an optical film and a protective film are bonded can be manufactured. In the above-mentioned manufacturing method, the peeled film after peeling is transported so that the width direction of the peeled film after peeling coincides with the normal direction, and then the transport direction of the peeled film is changed to a direction crossing the virtual plane. Thereby, the degree of freedom of the layout of the manufacturing device when manufacturing the laminated optical film is improved. As a result, it is possible to effectively utilize the plant space where the device is installed.

The above-mentioned optical film may be a polarizing film obtained by subjecting a polyvinyl alcohol-based resin film to stretching treatment and crosslinking treatment.

The polarizing film that has undergone stretching treatment and cross-linking treatment tends to crack easily. When such a polarizing film is an optical film, if the transport direction of the polarizing film is changed, the optical film may be damaged due to the influence of the change. On the other hand, in the above-mentioned manufacturing method, the conveying direction of the protective film or the release film is changed, and therefore, the optical film does not suffer damage accompanying the change of the conveying direction. With this, the above-mentioned manufacturing method is It is more effective when the academic film is the above-mentioned polarizing film.

Another aspect of the manufacturing apparatus of the laminated optical film of the present invention includes: an optical film conveying section that conveys the strip-shaped optical film in a manner that fixes the direction of the first imaginary plane orthogonal to the width direction of the optical film; The protective film conveying part, which conveys the protective film in a strip form so that the second imaginary plane orthogonal to the width direction of the protective film crosses the first imaginary plane; the protective film conveying direction changing part, which makes the width of the protective film The direction is consistent with the normal direction of the first imaginary plane, and the conveying direction of the protective film from the protective film conveying section is changed; and the laminating section, which continuously matches the longitudinal direction of each other The protective film whose conveying direction has been changed by the protective film conveying direction changing section and the optical film conveyed by the optical film conveying section are bonded together to form a tape-like laminated optical film formed by bonding the optical film and the protective film .

In the above-mentioned manufacturing apparatus, the strip-shaped optical film is transported by the optical film transport section so that the direction of the first imaginary plane orthogonal to the width direction of the strip-shaped optical film is fixed. In addition, the protective film conveying section conveys the belt-shaped protective film so that the second virtual plane orthogonal to the width direction of the belt-shaped protective film crosses the first virtual plane. The protective film conveying direction changing section changes the conveying direction of the protective film from the conveying so that the width direction of the protective film coincides with the normal direction of the first imaginary plane. Then, the bonding part continuously bonds the protective film and the optical film whose conveying direction has been changed so that the longitudinal directions of each other are aligned, to form a tape-shaped laminated optical film formed by bonding the optical film and the protective film . In this way, in the above-mentioned manufacturing apparatus, the orientation of the conveying direction of the protective film is changed, and therefore, the degree of freedom of the layout of the manufacturing apparatus when manufacturing the laminated optical film is improved. As a result, it is possible to effectively utilize the plant space where the device is installed.

A manufacturing apparatus for a laminated optical film according to another aspect of the present invention includes: an optical film conveying section that conveys a strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; The film conveying section, in a state where a strip-shaped release film is peelably attached, so that the width direction of the protective film is aligned with the normal line of the virtual plane The strip-shaped protective film is conveyed in the same direction; the peeling part, which continuously peels the peeling film from the protective film; the peeling film conveying part, is conveyed in a way that the width direction of the peeling film is consistent with the normal direction of the above-mentioned imaginary plane The peeling film peeled by the peeling part; the peeling film conveying direction changing part, which changes the conveying direction of the peeling film conveyed by the peeling film conveying part to a direction that intersects the above-mentioned imaginary plane; and the laminating part, which makes mutual The length direction is the same, the protective film conveyed by the protective film conveying part and the optical film conveyed by the optical film conveying part are bonded together to form a tape-shaped sticker formed by bonding the optical film and the protective film合optical film.

In the above-mentioned manufacturing apparatus, the optical film conveying part conveys the strip-shaped optical film so that the direction of the imaginary plane orthogonal to the width direction of the strip-shaped optical film is fixed. In addition, the protective film conveying section conveys the protective film in the form of a strip in a state where the strip-shaped release film is peelably attached so that the width direction of the protective film coincides with the normal direction of the virtual plane. Then, the laminating section aligns the protective film conveyed by the protective film conveying section and the optical film conveyed by the optical film conveying section so that the longitudinal directions of each other are aligned to form a laminated optical film and protection A tape-shaped laminated optical film made of film. The above-mentioned manufacturing apparatus has a peeling part, and therefore, the peeling film can be continuously peeled from the protective film. Furthermore, the peeling film conveyance part conveys the peeling film after peeling so that the width direction of a peeling film may correspond with the normal direction of the said virtual plane. After that, the peeling film conveying direction changing section changes the conveying direction of the peeling film so as to cross the above-mentioned virtual plane. Since the peeling film can be peeled from the protective film by the peeling part, it is possible to manufacture a bonded optical film in which the optical film and the protective film are bonded. Then, the conveying direction of the peeling film after peeling was changed to the direction crossing the said virtual plane. Thereby, the degree of freedom of the layout of the manufacturing device when manufacturing the laminated optical film is improved. As a result, it is possible to effectively utilize the plant space where the device is installed.

A manufacturing apparatus for a laminated optical film according to another aspect of the present invention includes: an optical film conveying section that conveys a strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; first The peeling film conveying part, which makes the width direction of the peeling film and The strip-shaped release film is conveyed in a way that the normal direction of the imaginary plane is consistent; the protective film conveying part, which conveys the strip-shaped protective film in such a way that the width direction of the protective film is consistent with the normal direction; the laminating part, which The optical film, the release film, and the protective film are bonded together to form a bonded optical film by aligning the longitudinal directions of each other and sandwiching the optical film with the release film and the protective film; bonding the optical film conveying section to make The laminated optical film formed by the bonding part is transported in such a way that the width direction of the combined optical film is consistent with the above normal direction; the peeling part, which peels the release film from the laminated optical film transported by the laminated optical film transport part; 2 The peeling film conveying section, which conveys the peeling film peeled by the peeling section so that the width direction of the peeling film coincides with the above-mentioned normal direction; and the peeling film conveying direction changing section, which conveys the second peeling film conveying section. The conveying direction of the coming release film is changed to a direction intersecting the above-mentioned imaginary plane.

In the above-mentioned manufacturing apparatus, the optical film conveying part conveys the strip-shaped optical film so that the direction of the imaginary plane orthogonal to the width direction of the strip-shaped optical film is fixed. The first peeling film conveying section and the protective film conveying section respectively convey the peeling film and the protective film so that the width direction of the peeling film and the protective film coincides with the normal direction of the virtual plane. The bonding part bonds the optical film, the peeling film, and the protective film conveyed in the above manner so that the optical film is sandwiched between the protective film and the release film. After that, the peeling part peels the peeling film bonded to the optical film from the optical film. Thereby, a bonded optical film in which an optical film and a protective film are bonded can be manufactured. In the above-mentioned manufacturing apparatus, the second release film transport section transports the transport direction of the release film after peeling so that the width direction of the release film coincides with the above-mentioned normal direction. After that, the release film transport direction changing section changes the direction of the release film. The conveying direction is changed to the direction intersecting the above imaginary plane. Thereby, the degree of freedom of the layout of the manufacturing device when manufacturing the laminated optical film is improved. As a result, it is possible to effectively utilize the plant space where the device is installed.

The peeling method of the peeling film of another aspect of the present invention is a method of peeling the peeling film from the optical film to which the strip-shaped peeling film is releasably attached, and includes: the optical film conveying step to make the optical film The direction of the imaginary plane perpendicular to the width direction is fixed, and the optical film is transported with the release film attached; the peeling step is from the transport of the optical film The optical film from the step of transporting peels the release film; the step of transporting the release film in which the width direction of the release film coincides with the normal direction of the above-mentioned imaginary plane; and the release film transporting the release film. The direction changing step changes the conveying direction of the peeling film from the peeling film conveying step to a direction that intersects the above-mentioned imaginary plane.

In the above-mentioned peeling method, after peeling the peeling film from the optical film to which the strip-shaped peeling film was affixed peelably, the conveyance direction of this peeling film is changed to the direction which intersects the said virtual plane. Thereby, the degree of freedom of the layout of the device for peeling the peeling film from the optical film to which the peeling film is attached is improved. As a result, it is possible to effectively utilize the plant space where the device is installed.

In one embodiment, in the optical film conveyance step, the optical film may be bonded with a release film in a state where a tape-shaped protective film is bonded.

In one embodiment, in the step of changing the transport direction of the release film, the transport direction of the release film can be changed by winding the release film around a roller that rotates around the following axis, which is the same as the release film The axis of the direction in which the width direction of the release film intersects in the transport step.

According to the present invention, it is possible to provide a technology that can effectively utilize the factory space when a plurality of films are bonded, or when a release film is peeled from an optical film to which a release film is bonded.

10, 10A, 10B‧‧‧Polarizing plate (bonding optical film)

11‧‧‧Polarizing film (optical film)

12‧‧‧Protective film (Second protective film)

13‧‧‧Protective film

20‧‧‧Laminated protective film (protective film with peeling film attached to it in a peelable manner)

21‧‧‧Peeling film

30, 30A, 30B, 30C, 30D‧‧‧Manufacturing equipment (manufacturing equipment for laminating optical films)

31‧‧‧Film transport department (optical film transport department)

31a‧‧‧roller

32‧‧‧Film Transport Department

32a‧‧‧roller

33‧‧‧Film transport department (protective film transport department)

33a‧‧‧roller

34‧‧‧Film transport section (1st release film transport section)

34a‧‧‧roller

35‧‧‧Film transport section (Laminated optical film transport section)

35a‧‧‧roller

36‧‧‧Film transport section (release film transport section, second release film transport section)

36a‧‧‧roller

37‧‧‧Lamination Department

37a‧‧‧roller

37b‧‧‧roller

38‧‧‧Striping Department

40‧‧‧Layered body

40A‧‧‧Laminated body

40B‧‧‧Layered body

50‧‧‧Polarizing plate with surface protective film (laminated optical film)

51‧‧‧Polarizing plate (optical film)

52‧‧‧Surface protective film (protective film)

53‧‧‧Adhesive layer

54‧‧‧Surface protective film (protective film)

60‧‧‧Laminated surface protective film (protective film with peelable film attached)

61‧‧‧Peeling film

70, 70A, 70B‧‧‧Manufacturing equipment (manufacturing equipment for laminating optical film)

71‧‧‧Film transport department (optical film transport department)

71a‧‧‧roller

72‧‧‧Film Transport Department (Protective Film Transport Department)

72a‧‧‧roller

73‧‧‧Film Transport Department

73a‧‧‧roller

74‧‧‧Film conveying part (peeling film conveying part)

74a‧‧‧roller

75‧‧‧Film transport section (Laminated optical film transport section)

75a‧‧‧roller

76‧‧‧Stripping Department

77‧‧‧Lamination Department

77a‧‧‧roller

77b‧‧‧roller

A1‧‧‧ direction

A2‧‧‧direction

A3‧‧‧ direction

A4‧‧‧direction

A5‧‧‧direction

A6‧‧‧direction

F‧‧‧film

P1‧‧‧Imaginary plane (1st imaginary plane)

P2‧‧‧Virtual plane (the second virtual plane)

P3‧‧‧Virtual plane (1st imaginary plane)

P4‧‧‧Imaginary plane (2nd imaginary plane)

TB‧‧‧Transfer direction change department

TB1‧‧‧Transfer direction change section (protective film transport direction change section)

TB2‧‧‧Transfer direction change section (Release film transport direction change section)

TB3‧‧‧Transfer direction change section (protective film transport direction change section)

TB4‧‧‧Transfer direction change section (Release film transport direction change section)

Fig. 1 is a schematic diagram showing the layer structure of the laminated optical film in the first embodiment.

Fig. 2 is a schematic diagram showing the layer structure of a laminated protective film used in the manufacture of the laminated optical film shown in Fig. 1.

Fig. 3 is a diagram for explaining a conveying direction changing part used in the manufacture of the laminated optical film shown in Fig. 1.

Fig. 4 is a diagram for explaining the manufacturing method of the laminated optical film shown in Fig. 1.

Fig. 5 is a diagram for explaining the manufacturing method of the laminated optical film shown in Fig. 1.

Fig. 6 is a diagram for explaining another example of the manufacturing method of the bonded optical film shown in Fig. 1.

FIG. 7 is a diagram for explaining another example of the manufacturing method of the bonded optical film shown in FIG. 1.

Fig. 8 is a schematic diagram showing the layer structure of another example of the bonded optical film in the first embodiment.

Fig. 9 is a diagram for explaining the manufacturing method of the laminated optical film shown in Fig. 8.

Fig. 10 is a schematic diagram showing the layer structure of another example of the bonded optical film in the first embodiment.

FIG. 11 is a diagram for explaining the manufacturing method of the laminated optical film shown in FIG. 10.

Fig. 12 is a diagram for explaining the manufacturing method of the laminated optical film shown in Fig. 10.

Fig. 13 is a schematic diagram showing the layer structure of the laminated optical film in the second embodiment.

FIG. 14 is a schematic diagram showing the layer structure of the laminated surface protective film for manufacturing the laminated optical film shown in FIG. 13.

FIG. 15 is a diagram for explaining the manufacturing method of the laminated optical film shown in FIG. 13.

Fig. 5 is a diagram for explaining the manufacturing method of the laminated optical film shown in Fig. 13.

Figure 17 is used to perform other examples of the manufacturing method of the laminated optical film shown in Figure 13 Illustrated schema.

FIG. 18 is a diagram for explaining another example of the manufacturing method of the bonded optical film shown in FIG. 13.

Hereinafter, the embodiments of the present invention will be described with reference to the drawings. The same symbols are attached to the same elements. The repeated description will be omitted. The size ratio of the drawing may not be consistent with the description. In the description, terms such as "up" and "down" indicating directions are convenient terms based on the state shown in the diagram.

(First Embodiment)

As a first embodiment, a description will be given of a form of manufacturing a strip-shaped polarizing plate, which has a cross-sectional structure schematically shown in FIG. 1. In the following description, "belt-shaped" refers to a slender planar shape with a fixed width in plan view (when viewed from the thickness direction).

The polarizing plate 10 has a polarizing film 11 and protective films 12 and 13. The polarizing plate 10 is a bonded optical film obtained by bonding the protective films 12 and 13 to the polarizing film 11. The width (length orthogonal to the thickness direction) of the polarizing plate 10 is 1000 mm or more for example, and the length in the longitudinal direction is 500 m to 10000 m, for example. An example of the thickness of the polarizing plate 10 is 10 μm or more and 200 μm or less. The polarizing plate 10 is bonded to, for example, a liquid crystal cell to form a liquid crystal panel.

The polarizing film 11 is an optical film having linear polarization characteristics, which refers to the characteristics of selectively transmitting light that vibrates in a specific direction. An example of the thickness of the polarizing film 11 is 5 μm to 30 μm. The polarizing film 11 is produced by performing an extension step, a dyeing treatment step, and a crosslinking step on a raw film that becomes the polarizing film 11.

Examples of raw film include: polyvinyl alcohol (hereinafter referred to as "PVA") resin film, polyvinyl acetate resin film, ethylene/vinyl acetate (hereinafter referred to as "EVA") resin film , Polyamide resin film and polyester resin film. Generally, from the viewpoint of the adsorption and orientation properties of dichroic dyes, PVA-based resin films can be used, especially Use PVA film. Unless otherwise specified, in the following description, the raw material film is a PVA film.

In the stretching step, the strip-shaped raw film is uniaxially stretched in the length direction. The extension method may also be any one of dry and wet extension methods. The stretch magnification is 3 to 8 times. The uniaxial stretching of the raw film can be carried out before the dyeing of the dichroic pigment, simultaneously with the dyeing, or after the dyeing. In the case of uniaxial stretching after dyeing, the uniaxial stretching may also be performed before or during the crosslinking treatment described later. Moreover, it is also possible to perform uniaxial stretching in the above-mentioned plural stages. In the dyeing treatment step, the raw film is dyed with dichroic dye. Examples of dichroic pigments used for dyeing include iodine and dichroic dyes. Through the dyeing process, the dichroic dye is aligned in the extending direction of the raw film and adsorbed on the raw film. As a result, the raw film after dyeing has linear polarization characteristics. In the cross-linking step, the raw film that has passed through the dyeing treatment step is immersed in an aqueous solution containing a cross-linking agent for cross-linking treatment. A preferred example of the crosslinking agent is boric acid, but other crosslinking agents such as boron compounds such as borax, glyoxal, and glutaraldehyde can also be used. This cross-linking treatment is a treatment to achieve water resistance or hue adjustment (to prevent bluishness) by cross-linking.

The protective film (second protective film) 12 is a film for protecting the polarizing film 11. The protective film 12 is provided on one side of the polarizing film 11 via an adhesive layer (not shown). The material of the resin film constituting the protective film 12 can be, for example, polyolefin resins such as chain polyolefin resins (polypropylene resins, etc.), cyclic polyolefin resins (norbornene resins, etc.); Cellulose resins such as acetyl cellulose and diacetyl cellulose; polyester resins such as polyethylene terephthalate and polybutylene terephthalate; polycarbonate resins; such as A (Meth)acrylic resin like methyl acrylate resin; polystyrene resin; polyvinyl chloride resin; acrylonitrile‧butadiene‧styrene resin; acrylonitrile‧styrene resin; polyacetic acid Vinyl ester resins; polyvinylidene chloride resins; polyamide resins; polyacetal resins; modified polyphenylene ether resins; polysulfide resins; polyether sulfide resins; polyarylate resins; Polyimide resin; polyimide resin, etc. Also, the protective film 12 may be a phase difference A protective film with optical functions like a film and brightness enhancement film. An example of the thickness of the protective film 12 is 10 μm to 200 μm.

The protective film 13 is the same as the protective film 12 for protecting the polarizing film 11. The protective film 13 is provided on the surface of the polarizing film 11 opposite to the surface on which the protective film 12 is provided via an adhesive layer (not shown). The example of the resin film constituting the protective film 13 is the same as the case of the protective film 12. The resin films constituting the protective films 12 and 13 may be the same or different. The example of the thickness of the protective film 13 is also the same as that of the protective film 12. The thickness of the protective film 13 may be the same as or different from the thickness of the protective film 12.

Next, the manufacturing method of the polarizing plate 10 is demonstrated. The strip-shaped protective films 12 and 13 are attached to both surfaces of the strip-shaped polarizing film 11 so that the length directions of the strip-shaped protective films 12 and 13 are aligned, thereby manufacturing the polarizing plate 10.

In the manufacturing process of the polarizing plate 10, the belt-shaped laminated protective film 20 shown schematically in FIG. 2 is used. FIG. 2 schematically shows a cross-sectional structure (or laminate structure) orthogonal to the longitudinal direction of the laminated protective film 20. The laminated protective film 20 is a film in which the strip-shaped release film 21 is releasably bonded to one side of the protective film 13 so that the strip-shaped release film 21 is aligned with the longitudinal direction of the protective film 13.

For example, a self-adhesive resin film having adhesiveness alone can be used as the release film 21. As the material of the self-adhesive resin film, considering the ease of handling and ensuring a certain degree of transparency, it is industrially mass-produced and inexpensive. Polyethylene resin, polypropylene resin, polystyrene resin and As the polyethylene terephthalate resin, etc., it is preferable to use a polyethylene resin film having relatively soft properties. In addition, a film obtained by molding one or two or more of the above-mentioned resins into a single layer or multiple layers can also be used as a peelable film. An example of the thickness of the release film 21 is 5 μm to 200 μm, preferably 10 μm to 100 μm. Here, a self-adhesive resin film is exemplified as the release film 21, but the release film 21 may be a film having an adhesive layer.

In the manufacturing process of the polarizing plate 10, the conveying direction change shown schematically in FIG. 3 is used Update TB. The conveyance direction change part TB is a member for changing the conveyance direction of the film F conveyed in one direction. Specifically, the conveyance direction changing portion TB is a roller that is arranged on the conveyance path of the film F in a state where the rotation axis direction crosses the width direction of the film F. The width direction of the film F as a reference for the arrangement direction (direction of the rotation axis) of the conveying direction changing portion TB refers to the width direction of the film F before entering the conveying direction changing portion TB. The roller system as the conveying direction changing part TB is known as a steering rod. FIG. 3 shows an example in which the width direction of the film F and the rotation axis of the conveying direction changing portion TB cross at about 45°.

A previously well-known roller can be used as the steering lever, that is, the conveying direction changing portion TB. Examples of the conveying direction changing portion TB include metal rollers, rubber rollers, sponge rubber rollers, resin rollers, carbon rollers, and the like. As the material of the metal roller, stainless steel or aluminum such as SUS304 and SUS316 can be cited. As the material of the rubber roller, silicone rubber, fluorine rubber, chloroprene rubber, nitrile rubber, etc. can be cited. As the material of the sponge rubber roller, there can be cited Chloroprene, ethylene propylene diene rubber, etc., as the material of the resin roller, fluororesin, etc. can be cited, and as the material of the carbon roller, carbon fiber reinforced plastic, etc. can be cited.

Metal rollers, rubber rollers, resin rollers, and carbon rollers are preferably rollers that are ground such that the maximum height of the surface roughness of the JIS B 0601 (surface roughness) roughness curve becomes 0.1 μm to 1.0 μm. It is also possible to form a protective film such as a chromium plating layer, a nickel plating layer, and diamond-like carbon on the outermost surface. Even when a protective film is formed on the outermost surface, it is preferable to grind so that the maximum height of the roughness curve of JIS B 0601 (surface roughness) of the outermost surface is 0.1μm~1.0μm .

When a rubber roller is used, the hardness of the rubber roller is preferably about 60 degrees to 90 degrees on a JIS Shore C scale measured by the test method of JIS K 6301.

When using a sponge rubber roller, it is better to use the JIS Shore C scale measured by the test method of JIS K 6301. The hardness of the sponge is about 20 degrees to 60 degrees, and then about 25 degrees to 50 degrees. It is about 0.4g/cm ³ ~0.6g/cm ³ , and then about 0.42g/cm ³ ~0.57g/cm ³ , and the maximum height of the roughness curve of JIS B 0601 (surface roughness) of surface roughness is About 10μm~30μm.

4 and 5, the manufacturing apparatus (manufacturing apparatus for bonding optical film) 30 of the polarizing plate 10 is demonstrated. FIG. 4 corresponds to the state where the manufacturing device 30 is viewed from the upper side. FIG. 5 corresponds to a diagram when the manufacturing apparatus 30 is viewed from the side.

The hatched part in FIG. 4 represents the protective film 12 conveyed from the upper direction to the lower direction in FIG. 5. In FIG. 5, for convenience of description, the thicknesses of the polarizing film 11, the protective film 12, and the laminated protective film 20 are emphasized and these films are illustrated. The laminated protective film 20 has a laminated structure of the protective film 13 and the release film 21, but is schematically shown as a film with a fixed thickness. When the release film 21 has been peeled off, the thick solid line indicates the peeled off膜21。 Film 21.

For the purpose of explanation, there are cases where the up and down direction in FIG. 5 is also referred to as the vertical direction, and the direction orthogonal to the vertical direction is referred to as the horizontal direction. In the description of FIG. 4, there are also cases where the above-mentioned vertical direction and horizontal direction are used based on the corresponding relationship with FIG. 5.

As schematically shown in FIGS. 4 and 5, the manufacturing apparatus 30 includes film conveying parts 31, 32, 33, 34, 35, 36, conveying direction changing parts TB1, TB2, bonding part 37, and peeling part 38.

The film transport section (optical film transport section) 31 is a transport mechanism for transporting the polarizing film 11 in the longitudinal direction of the polarizing film 11. The film conveying section 31 conveys the polarizing film 11 to the bonding section 37.

The film conveyance part 31 has the some roller 31a arrange|positioned so that the rotation axis may be parallel. The number of rollers 31a is not limited to the number shown in FIGS. 4 and 5. The plural rollers 31a are arranged such that the extending direction of the rotation axis of the rollers coincides with the width direction of the polarizing film 11 (or is orthogonal to the longitudinal direction of the polarizing film 11). Thereby, the film conveyance part 31 conveys the polarizing film 11 so that the direction of the virtual plane (1st virtual plane) P1 orthogonal to the width direction of the polarizing film 11 may be substantially constant. In other words, the film conveyance section 31 conveys the polarizing film 11 so that the normal direction of the virtual plane P1 substantially coincides with the width direction of the polarizing film 11. In the form shown in FIG. 5, the polarizing film 11 is conveyed in the horizontal direction. In Figure 4 and Figure 5, for ease of illustration It shows that the imaginary plane P1 is represented by a fixed size, but the imaginary plane P1 is an imaginary infinite plane.

The film conveying unit 32 is a conveying mechanism for conveying the protective film 12 in the longitudinal direction. The film transport section 32 transports the protective film 12 to the bonding section 37. The film conveying part 32 is arranged on one side of the polarizing film 11 conveyed by the film conveying part 31. In the form shown in FIG. 5, the film conveying portion 32 is arranged above the polarizing film 11 in the vertical direction.

The film conveyance part 32 has the some roller 32a arrange|positioned so that the rotation axis may be mutually parallel. The number of rollers 32a is not limited to the number shown in FIGS. 4 and 5. The plurality of rollers 32a are arranged in such a way that the extension direction of their rotation axis is substantially the same as the width direction of the protective film 12 (or substantially orthogonal to the longitudinal direction of the protective film 12), and is substantially the same as the roller The extension direction of the rotation axis of 31a is parallel. Thereby, the film conveyance part 32 conveys the protective film 12 so that the width direction of the protective film 12 may substantially coincide with the normal direction of the virtual plane P1.

The film conveyance part (protective film conveyance part) 33 (refer FIG. 4) is a conveyance mechanism for conveying the laminated protective film 20 in a longitudinal direction. The film conveying part 33 is arranged on the opposite side of the film conveying part 32 with respect to the polarizing film 11 conveyed by the film conveying part 31. In the form shown in FIG. 4 and FIG. 5, the film conveying part 33 is arranged below the polarizing film 11 in the vertical direction.

The film conveyance part 33 has the some roller 33a arrange|positioned so that the extension direction of a rotating shaft may be parallel. The number of rollers 33a is not limited to the number shown in FIG. 4. The plurality of rollers 33a are arranged in such a way that the extension direction of their rotation axis is substantially the same as the width direction of the laminated protective film 20 (or substantially orthogonal to the longitudinal direction of the laminated protective film 20) and is aligned with the roller The extension direction of the rotation axis of 31a crosses (orthogonal in the example of FIG. 4). Thereby, the film conveyance section 33 conveys the laminated protective film 20 in a manner that the direction of the virtual plane P2 orthogonal to the width direction of the laminated protective film 20 is substantially fixed and the virtual plane P2 and the virtual plane P1 intersect. In FIG. 4, the virtual plane P2 is represented by a fixed size for the convenience of illustration, but the virtual plane P2 is a virtual infinite plane like the virtual plane P1.

The conveying direction changing part (protective film conveying direction changing part) TB1 is centered on the following axis As for the rotating roller (or steering lever), the shaft crosses the width direction of the laminated protective film 20 conveyed by the film conveying unit 33. In other words, the conveying direction changing portion TB1 is the conveying direction changing portion TB when the film F of FIG. 3 is used as the laminated protective film 20. The conveying direction changing part TB1 changes the conveying direction of the laminated protective film 20 that has been conveyed so that the width direction of the laminated protective film 20 substantially coincides with the normal direction of the virtual plane P1. 4 shows an example in which the width direction of the laminated protective film 20 before being wound around the conveying direction changing portion TB1 crosses the rotation axis of the conveying direction changing portion TB1 at about 45°. In addition, when the laminated protective film 20 is wound around the conveyance direction change part TB1, it is preferable to wind the laminated protective film 20 so that the release film 21 may contact with the conveyance direction change part TB1.

The film transport section 34 is a transport mechanism for transporting the laminated protective film 20 in the longitudinal direction, and the transport direction of the laminated protective film 20 has been changed by the transport direction changing section TB1. The film conveying section 34 is arranged on the opposite side of the film conveying section 32 with respect to the polarizing film 11 conveyed by the film conveying section 31. In the form illustrated in FIG. 4 and FIG. 5, the film conveying portion 34 is arranged below the polarizing film 11 in the vertical direction. The film conveyance part 34 conveys the laminated protective film 20 to the bonding part 37 so that the protective film 13 may be located on the polarizing film 11 side.

The film conveyance part 34 has the some roller 34a arrange|positioned so that the extension direction of a rotating shaft may be parallel. The number of rollers 34a is not limited to the number shown in FIG. 5. The plurality of rollers 34a are arranged in such a way that the extension direction of their rotation axis is substantially the same as the width direction of the laminated protective film 20 (or substantially orthogonal to the longitudinal direction of the laminated protective film 20), and substantially It is parallel to the extending direction of the rotation axis of the roller 31a. Thereby, the film conveyance part 34 conveys the laminated protective film 20 so that the width direction of the laminated protective film 20 may substantially coincide with the normal direction of the virtual plane P1.

The bonding part 37 has a pair of rollers 37a, 37b that bonds the polarizing film 11, the protective film 12, and the laminated protective film 20 together. The pair of rollers 37a and 37b are arranged such that their rotation axes are parallel to each other and parallel to the extending direction of the rotation axis of the roller 31a. The pair of rollers 37 a and 37 b are arranged opposite to each other in the thickness direction of the polarizing film 11 with the polarizing film 11 interposed therebetween. A pair of rollers 37a, 37b only What is necessary is just to arrange it so that it may be separated to the extent that it can press the several film|membrane sent in between them, and it can make it stick together.

The bonding part 37 presses the polarizing film 11, the protective film 12, and the laminated protective film 20 in the thickness direction by a pair of rollers 37a and 37b, thereby bonding these films to continuously form a strip Stacked body 40. The laminate 40 is a film obtained by bonding the release film 21 to the polarizing plate 10 which is the bonded optical film shown in FIG. 1.

The film conveyance part 35 is a conveyance mechanism for conveying the laminated body 40 sent out from the bonding part 37 in a longitudinal direction. The laminated body 40 contains the polarizing plate 10 which is a bonded optical film in 1st Embodiment. Thereby, the film conveyance part 35 is a bonding optical film conveyance part.

The film conveyance part 35 has the some roller 35a arrange|positioned so that the extension direction of a rotating shaft may be parallel. The number of rollers 35a is not limited to the number shown in FIGS. 4 and 5. The plurality of rollers 35a are arranged in such a way that the extending direction of their rotation axis is substantially the same as the width direction of the laminate 40 (or substantially orthogonal to the longitudinal direction of the laminate 40), and is substantially the same as the roller The extension direction of the rotation axis of 31a is parallel. Thereby, the film conveyance part 35 conveys the laminated body 40 so that the width direction of the laminated body 40 may substantially coincide with the normal direction of the virtual plane P1.

The peeling part 38 is a roller that peels the peeling film 21 from the laminate 40. Such rollers are known as peeling rollers. The peeling part 38 is arrange|positioned downstream of the bonding part 37 in the conveyance direction of the laminated body 40, and is arrange|positioned so that it may contact with the peeling film 21.

The film conveyance part (peel film conveyance part) 36 is a conveyance mechanism for conveying the peeling film 21 peeled by the peeling part 38 in a longitudinal direction. The film conveyance part 36 has the some roller 36a arrange|positioned so that the rotation axis may be mutually parallel. The number of rollers 36a is not limited to the number shown in FIGS. 4 and 5. The plurality of rollers 36a are arranged in such a way that the extension direction of their rotation axis is substantially the same as the width direction of the release film 21 (or orthogonal to the longitudinal direction of the release film 21), and is substantially the same as that of the roller 31a. The extension direction of the rotation axis is parallel. Thereby, the film conveying portion 36 is conveyed so that the width direction of the release film 21 substantially coincides with the normal direction of the imaginary plane P1 送release film 21.

The conveying direction changing part (the peeling film conveying direction changing part) TB2 is a roller (or steering lever) that rotates around an axis that intersects the width direction of the peeling film 21 conveyed by the film conveying part 36. In other words, the conveyance direction change part TB2 is the conveyance direction change part TB when the film F of FIG. 3 is made into the peeling film 21. As shown in FIG. The conveyance direction change part TB2 changes the conveyance direction of the release film 21 conveyed by the film conveyance part 36 to the direction which cross|intersects the virtual plane P1 (orthogonal in FIG. 4). 4 shows an example in which the width direction of the release film 21 before being wound around the conveying direction changing portion TB2 crosses the rotation axis of the conveying direction changing portion TB2 at about 45°.

The manufacturing method of the polarizing plate using the manufacturing apparatus 30 is demonstrated. When manufacturing the polarizing plate 10, the polarizing film 11 as an optical film is conveyed by the film conveyance part 31 to the bonding part 37 (optical film conveyance process). The film conveyance part 31 conveys the polarizing film 11 so that the direction of the virtual plane P1 orthogonal to the width direction of the polarizing film 11 may be fixed. In this case, as shown in FIG. 4, when the manufacturing apparatus 30 is viewed from the upper side, the polarizing film 11 is conveyed in the A1 direction indicated by the hollow arrow.

The strip-shaped polarizing film 11 can be prepared as the original roll, or the polarizing film 11 made by performing the stretching step, the dyeing step, and the cross-linking step on the raw film without being wound in a roll shape, but the polarizing film is continuously supplied 11. When preparing the polarizing film 11 as the original roll, in the transporting step of the polarizing film 11, the polarizing film 11 is sent out from the original roll, and the film conveying section 31 conveys the polarizing film 11 to the bonding section 37. When the polarizing film 11 made by performing the stretching step, the dyeing step, and the crosslinking step on the raw film is not wound in a roll shape, but the polarizing film 11 is continuously supplied, the polarized light obtained through each step The film 11 is supplied to the film conveyance part 31 and is conveyed to the bonding part 37. In the form shown in FIG. 5, the polarizing film 11 is conveyed in the horizontal direction, but as long as the direction of the virtual plane P1 orthogonal to the width direction of the polarizing film 11 is fixed, the conveying path is not limited to conveying in the horizontal direction.

The polarizing film 11 is transported on one side, and the protective film is transported to the bonding section 37 by the film transport section 32 on the other side. 膜12。 Film 12. The film conveyance part 32 conveys the protective film 12 so that the width direction of the protective film 12 may substantially coincide with the normal direction of the virtual plane P1. In the form shown in FIG. 5, the protective film 12 is transported by a plurality of rollers 32a, and is transported to the bonding portion 37 in contact with the upper surface of the polarizing film 11. The plurality of rollers 32a are in the vertical direction, It is arranged above the polarizing film 11.

Usually, a belt-shaped protective film 12 is prepared as the original sheet roll. Therefore, in the conveyance step of the protective film 12, the protective film 12 is sent out from the original sheet roll, and the protective film 12 is conveyed to the bonding part 37 by the film conveyance part 32.

While conveying the polarizing film 11 and the protective film 12 toward the bonding part 37, the belt-shaped laminated protective film 20 is conveyed by the film conveyance part 33 (1st protective film conveyance process). The film conveyance part 33 conveys the laminated protective film 20 so that the virtual plane P2 orthogonal to the width direction of the laminated protective film 20 crosses the virtual plane P1 (orthogonal in FIG. 4). In this case, as shown in FIG. 4, when the manufacturing apparatus 30 is viewed from the upper side, the laminated protective film 20 is conveyed in the A2 direction indicated by the hollow arrow.

Usually, a belt-shaped laminated protective film 20 is prepared as an original sheet roll. Therefore, in the conveying step of conveying the laminated protective film 20 by the film conveying section 33, the laminated protective film 20 is sent out from the original roll, and the laminated protective film 20 is conveyed by the film conveying section 33.

The conveying direction changing section TB1 changes the conveying direction of the laminated protective film 20 conveyed by the film conveying section 33 so that the width direction of the laminated protective film 20 coincides with the normal direction of the imaginary plane P1 (section 1Procedure for changing the conveying direction of the protective film). That is, the conveyance direction of the laminated protective film 20 is changed from the A2 direction to the A1 direction. In the step of changing the conveying direction of the laminated protective film 20, the laminated protective film 20 is wound around the conveying direction changing portion TB1 in advance so that the release film 21 in the laminated protective film 20 is in contact with the conveying direction changing portion TB1 . Thereby, even if the peeling film 21 is damaged due to load or friction caused by the conveying direction changing portion TB1, since the peeling film 21 will be peeled off in a subsequent step, the optical characteristics of the polarizing plate 10 will not be affected in any way.

The laminated protective film 20 whose conveying direction has been changed is conveyed to the bonding section 37 by the film conveying section 34. The film conveyance part 34 conveys the laminated protective film 20 so that the width direction of the laminated protective film 20 may substantially coincide with the normal direction of the virtual plane P1. The film conveying section 34 conveys the laminated protective film 20 in a state where the protective film 13 in the laminated protective film 20 is positioned on the polarizing film 11 side, and the laminated protective film 20 is fed to the bonding section 37. In the form shown in FIG. 5, the laminated protective film 20 is fed to the bonding part 37 so that the protective film 13 is in contact with the lower surface of the polarizing film 11.

In this way, the polarizing film 11, the protective film 12, and the laminated protective film 20 are continuously fed between the pair of rollers 37a and 37b that constitute the bonding portion 37 in a state in which their respective longitudinal directions are aligned.

After the polarizing film 11, the protective film 12, and the laminated protective film 20 are fed between the pair of rollers 37a, 37b, the pair of rollers 37a, 37b press the three films between them to continuously push the protective film 12 And the laminated protective film 20 is bonded to both surfaces of the polarizing film 11 (bonding step). Thereby, the belt-shaped laminated body 40 including the polarizing film 11, the protective film 12, and the laminated protective film 20 is formed.

The laminated protective film 20 is conveyed to the bonding portion 37 so that the release film 21 is located on the opposite side of the polarizing film 11. Thereby, as described above, the laminate 40 formed by bonding the protective film 12 and the laminated protective film 20 to both surfaces of the polarizing film 11 is a peeling film bonded to the polarizing plate 10 as a bonded optical film 21 persons.

For the bonding of the polarizing film 11 and the protective film 12, for example, an adhesive can be pre-coated on the bonding surface of at least one of the films, or the polarizing film 11 and the protective film 12 can also be fed to one Before the pair of rollers 37a and 37b, the adhesive is applied between the pair of rollers 37a and 37b. Water-soluble adhesives or ultraviolet curable adhesives can be used as adhesives. In addition, an adhesive may be used instead of the adhesive. The bonding of the polarizing film 11 and the laminated protective film 20 is also the same.

When the laminated body 40 formed by the bonding section 37 is sent out from the bonding section 37, the film conveying section 35 conveys the laminated body 40 so that the width direction of the laminated body 40 substantially coincides with the normal direction of the virtual plane P1 ( Lamination optical film transport step). With this, as shown in Figure 4, when the When the manufacturing apparatus 30 is viewed from the side, the layered body 40 is conveyed in the A1 direction indicated by the hollow arrow.

After that, the peeling part 38 provided on the conveying path of the film conveying part 35 continuously peels the peeling film 21 from the laminate 40 (peeling step). Thereby, the polarizing plate 10 which is a bonded optical film can be obtained.

After the release film 21 is peeled off from the laminate 40, the film transport section 36 transports the release film 21 so that the width direction of the release film 21 substantially coincides with the normal direction of the virtual plane P1 (release film transport step).

The conveyance direction change part TB2 changes the conveyance direction of the peeling film 21 conveyed by the film conveyance part 36 so that it may intersect the virtual plane P1 (peel film conveyance direction change step). Specifically, the conveyance direction of the release film 21 is changed so that a virtual plane orthogonal to the width direction of the release film 21 intersects with the virtual plane P1 (for example, orthogonal). In FIG. 4, the form which changed the conveyance direction to the hollow arrow A3 direction is illustrated. After the release film 21 whose conveying direction is changed in the above-mentioned manner is conveyed by a fixed distance, it is preferably wound on a roll, for example.

In the manufacturing method of the polarizing plate 10, when the manufacturing apparatus 30 is viewed from the upper side, while the polarizing film 11 is conveyed in the A1 direction, the protective film 12 and the laminated protective film 20 are bonded together to form the laminated body 40. While further conveying the laminated body 40 formed as described above in the A1 direction, the release film 21 is continuously peeled off to manufacture the polarizing plate 10.

In the manufacturing method of the polarizing plate 10, the conveyance direction of the laminated protective film 20 is further changed in the conveyance process until the laminated protective film 20 is sent to the bonding part 37. A specific description will be given using the A1 direction and A2 direction shown in FIG. 4.

As described above, the polarizing film 11 is conveyed in the A1 direction. In contrast, the laminated protective film 20 is first conveyed in the A2 direction that crosses the A1 direction (orthogonal in FIG. 4). After that, the conveying direction of the laminated protective film 20 was changed to the A1 direction.

The polarizing plate 10 has a laminated structure. Therefore, when the protective film 12, the polarizing film 11, and the laminated protective film 20 are bonded together, these films are laminated in the thickness direction. Therefore, even since the beginning Since the transport direction of the laminated protective film 20 is set to the A1 direction, it is also necessary to form a multi-stage structure in the entire transport path at least up to the bonding portion 37 of the polarizing film 11 and the laminated protective film 20. The multi-stage structure is A multi-stage structure in which the transport mechanism for transporting these films overlaps each other in the vertical direction.

In the above situation, the layout of the polarizing plate manufacturing device when installed in the factory is essentially fixed, and the factory space cannot be effectively used. In addition, the work efficiency of operations such as hanging the film roll on a conveying roller or maintenance work decreases. Furthermore, an air cleaning device is provided for the entire multi-stage structure of the manufacturing device in which the transport mechanism of each film is arranged in multiple stages. The air cleaning device is provided with an air filter for removing dirt, dust, etc. in the air (for example, HEPA (High Efficiency Particulate Air, high efficiency particulate air) filter) etc. As a result, it is difficult to remove dirt and the like in the film conveying path of the lower stage, and defects caused by dirt and the like are likely to occur in the manufactured polarizer.

On the other hand, when changing the conveying direction of the laminated protective film 20 in the middle of conveying, as shown in FIG. 4, it can be carried in from the lateral direction (A2 direction) with respect to the conveying direction (A1 direction) of the polarizing film 11 The protective film 20 is laminated, and the polarizing film 11 and the laminated protective film 20 are laminated. Therefore, when the manufacturing device 30 is installed in the factory, the layout freedom is high, and the factory space can be effectively utilized.

Furthermore, during the conveying process of the polarizing film 11 and the laminated protective film 20, since a conveying area where the films do not overlap in the vertical direction can be formed, the workability of the film winding operation or maintenance operation is also improved. Thereby, the productivity of the polarizing plate 10 is also improved.

In addition, during the conveying process of the polarizing film 11 and the laminated protective film 20, since the conveying area where the films do not overlap in the vertical direction can be formed, for example, air cleaning can be provided for the polarizing film 11 and the laminated protective film 20, respectively. Device. Therefore, it is possible to reduce the contamination or defects caused by the contamination in the manufactured polarizer. As a result, the manufacturing yield of the polarizing plate 10 is high, and the productivity of the polarizing plate 10 is also improved.

When the laminated protective film 20 is wound around the conveying direction changing part TB1, the conveying direction is changed At this time, the laminated protective film 20 is in contact with the conveying direction changing portion TB1. It is easy to cause damage (for example, scratches, etc.) on the surface contacting the conveying direction changing section TB1 due to load or friction accompanying the change of the direction of the conveying direction changing section TB1 to the layered protective film 20, but the release film 21 contacts the conveying direction changing section TB1 . The peeling film 21 is a film peeled by the peeling part 38, so even if the peeling film 21 is damaged due to load or friction caused by the conveying direction changing part TB1, it will not have any influence on the optical characteristics of the polarizing plate 10. In this way, the degree of freedom of the layout of the factory is improved, and the productivity of the polarizing plate 10 is also improved.

As described above, the polarizing film 11 is made during the manufacturing process, after being stretched in the stretching step, through the cross-linking step. In this way, the polarizing film 11 produced including the stretching step and the cross-linking step tends to crack in one direction. Thereby, for example, if the conveying direction changing part TB is used to change the conveying direction of the polarizing film in order to increase the degree of freedom of the layout in the factory, the polarizing film is easily damaged. On the other hand, in the above-mentioned manufacturing apparatus 30 and the manufacturing method using it, the conveyance direction of the laminated protective film 20 is changed. Thereby, the degree of freedom of the layout of the factory can be improved, and the productivity of the polarizing plate 10 can be improved.

In the manufacturing method of the polarizing plate 10 using the manufacturing apparatus 30, after peeling the peeling film 21 from the laminated body 40, the conveyance direction of the peeling film 21 is also changed. Specifically, during the conveying process of the peeling film 21 peeled from the laminate 40, the conveying direction of the peeling film 21 is changed so as to advance in a direction crossing the virtual plane P1. In the form shown in FIG. 4, the conveyance direction of the release film 21 is changed to the direction substantially orthogonal to the conveyance direction of the polarizing film 11 and the laminated body 40. As shown in FIG.

The peeling film 21 is a film that is finally processed after peeling from the laminate 40. However, in order to peel the release film 21 and to transport the release film 21 to a portion wound around a roller for processing, for example, tension must be applied to the release film 21. That is, in order to apply tension to the release film 21, a fixed transport distance is generated. Thereby, for example, if the conveying direction of the laminated body 40 and the conveying direction of the peeling film 21 after peeling overlap in the vertical direction, the layout of the factory will be fixed. On the other hand, when the conveying direction of the release film 21 is changed in the middle At this time, the layout of the manufacturing device 30 has a high degree of freedom, and the factory space can be used more effectively.

When a thin polarizing plate is manufactured, the polarizing plate may deform due to the influence of the pressing state of the bonding portion 37 and the like, which may cause defects.

On the other hand, in the first embodiment, the laminated protective film 20, the polarizing film 11, and the protective film 12 are bonded by the bonding portion 37. Then, the peeling film 21 is peeled from the laminate 40 to which the polarizing film 11 and the laminate protective film 20 are bonded, and the polarizing plate 10 is obtained. The laminated protective film 20 is thicker than the protective film 13 because the release film 21 is bonded to the protective film 13. Then, after the layered body 40 is formed, the release film 21 is peeled off from the layered body 40. Therefore, it is possible to manufacture the thin polarizing plate 10 while suppressing the deformation of the polarizing plate 10 caused by the bonding portion 37. Therefore, the productivity of the polarizing plate 10 can be improved.

In the first embodiment described above, the laminated body 40 including the polarizing plate 10 as the bonded optical film is also an optical film bonded with a release film. In this case, the step after sending out from the bonding part 37 corresponds to the peeling method of peeling the peeling film from the optical film to which the peeling film 21 was stuck.

(Variation 1-1)

In the manufacturing method of the polarizing plate demonstrated using FIGS. 4 and 5, after peeling the peeling film 21 from the laminated body 40, there is a step of changing the conveyance direction of the peeling film 21. As shown in FIG. However, this step may not be provided. That is, as shown in the manufacturing apparatus 30A shown in FIG. 6, the conveyance direction change part TB2 may not be provided. Even in this case, since the conveying direction of the laminated protective film 20 has been changed, the degree of freedom of the layout when the manufacturing apparatus 30A is installed in the factory can be improved. Furthermore, the productivity of the polarizing plate 10 can also be improved.

(Variation 1-2)

In the manufacturing method of the polarizing plate described using FIGS. 4 and 5, there is a step of changing the conveying direction of the laminated protective film 20. However, this step may not be provided. That is, like the manufacturing apparatus 30B shown in FIG. 7, the conveyance direction change part TB1 may not be provided, and the film conveyance part 33 may not be provided. In this case, as long as the width direction of the laminated protective film 20 is In order to qualitatively coincide with the normal direction of the virtual plane P1, the laminated protective film 20 may be conveyed by the film conveying section 34. For example, when the laminated protective film 20 is prepared as the original sheet roll, the laminated protective film 20 sent from the original sheet roll is transported by the film transport section 34. In the modified example 1-2, since the conveying direction of the release film 21 has also been changed, the degree of freedom of the layout when the manufacturing device 30B is installed in the factory can be improved.

(Variations 1-3)

The structure of the polarizing plate is not limited to the form in which the protective films 12 and 13 are attached to the two surfaces of the polarizing film 11 as shown in FIG. 1, and the protective film 13 may be applied to the polarizing plate 10A as shown in FIG. It is attached to only one side of the polarizing film 11. That is, the polarizing plate 10 shown in FIG. 1 may not have the protective film 12.

The polarizing plate 10A can be manufactured by, for example, the manufacturing apparatus 30C shown in FIG. 9. The manufacturing apparatus 30C has the same configuration as the manufacturing apparatus 30 except that it does not include the film transport section 32. The manufacturing method of the polarizing plate using the manufacturing device 30C is the same as the manufacturing method of the polarizing plate using the manufacturing device 30 except that it does not include the transport step of the protective film 12 in the manufacturing method of the polarizing plate 10. Since the conveyance step of the protective film 12 is not provided, in the bonding step by the bonding part 37, the polarizing film 11 and the laminated protective film 20 are bonded to form a laminated body 40A of these films. After that, in the peeling step using the peeling part 38, the peeling film 21 is peeled from the laminate 40A, thereby forming the polarizing plate 10A.

The manufacturing method described in the modified examples 1-3 manufactures the following polarizing plate 10A, and the polarizing plate 10A is provided with the protective film 13 only on one side of the polarizing film 11 instead of on both sides. Thereby, a thin polarizing plate 10A can be manufactured, and the thin polarizing plate 10A is thinner than when the protective film is provided on both sides of the polarizing film. Such a thin polarizing plate 10A can be preferably used in a thin liquid crystal display device, for example.

When manufacturing a thin polarizing plate, the polarizing plate may be deformed due to the influence of the pressing state at the bonding portion 37 and the like, which may cause defects.

In contrast, in Modifications 1-3, the laminated protective film 20 and The polarizing film 11 is attached. Then, the peeling film 21 is peeled from the laminated body 40A to which the polarizing film 11 and the laminated protective film 20 were bonded, and the polarizing plate 10A is obtained. The laminated protective film 20 is thicker than the protective film 13 because the release film 21 is bonded to the protective film 13. Then, after the layered body 40A is formed, the release film 21 is peeled off from the layered body 40A. Therefore, while suppressing the deformation of the polarizing plate 10A caused by the bonding portion 37, it is possible to manufacture the thin polarizing plate 10A. Therefore, the manufacturing method of the modification 1-3 can improve the productivity of the polarizing plate 10, and is helpful for manufacturing a thin polarizing plate.

Regarding the manufacturing method of the polarizing plate 10A in the modified example 1-3, the aspects of the factory space, the improvement of workability, and the improvement of the productivity of the polarizing plate 10A can be effectively used as shown in Figs. 4 and 5 Description stated.

This modification 1-3 is also the same as modification 1-1, and the step of changing the conveyance direction of the release film 21 may not be provided. Or, similarly to the modified example 1-2, the step of changing the conveyance direction of the laminated protective film 20 may not be provided.

(Variations 1-4)

Contrary to Modification 1-3, the polarizing plate may also have a configuration in which a protective film 12 is attached to the polarizing film 11 like the polarizing plate 10B shown in FIG. 10. In order to explain the difference in the manufacturing steps, the polarizing plate 10A and the polarizing plate 10B will be described separately, but the polarizing plate 10A and the polarizing plate 10B are substantially the same.

The polarizing plate 10B can be manufactured by, for example, the manufacturing apparatus 30D shown in FIGS. 11 and 12. The configuration of the manufacturing device 30D is the same as that of the manufacturing device 30A. However, the difference between the manufacturing method using the manufacturing apparatus 30D and the manufacturing method of the polarizing plate 10 is that instead of the tape-shaped laminated protective film 20, the tape-shaped protective film 13 without a release film is used.

Based on the above differences, in the manufacturing method of the polarizing plate using the manufacturing device 30D, the film conveying section 33 conveys the protective film 13, the conveying direction changing section TB1 changes the conveying direction of the protective film 13, and the film conveying section 34 also Transport the protective film 13. Then, the bonding part 37 bonds the protective film 12, the polarizing film 11, and the protective film 13 together, and forms the laminated body 40B. For use In the bonding step of the bonding portion 37, the protective film 13 is releasably bonded to the polarizing film 11 to form a laminate 40B. This can be achieved by adjusting the adhesive force of the adhesive used to bond the polarizing film 11 and the protective film 13 in advance. In addition, the following surface protective film (protective film) can also be used as the protective film 13, the surface protective film (protective film) having an adhesive on the side where the polarizing film 11 is attached.

After that, the peeling section 38 peels the protective film 13 from the laminate 40B, the film conveying section 36 conveys the peeled protective film 13, and the conveying direction changing section TB2 further changes the conveying direction of the protective film 13. In this manufacturing method, the polarizing plate 10B is obtained by peeling the protective film 13 from the laminate 40B. The hatched part of FIG. 12 shows the protective film 13 after the conveyance direction is changed by the conveyance direction change part TB2.

The film conveying section 33 also conveys the protective film 13. Therefore, the conveying step of the protective film 13 by the film conveying section 36 can be regarded as a second protective film conveying step. Similarly, the conveying direction changing section TB1 also changes the conveying direction of the protective film 13. Therefore, the step of changing the conveying direction of the protective film 13 by the conveying direction changing section TB2 can be regarded as the second protective film conveying direction changing step .

The polarizing film 11 and the protective film 12 are thin. Therefore, for example, if only the above two films are to be bonded together, as in the case described in Modification Example 1-3, there may be cases where the bonding is formed The polarizing plate is deformed by the pressing force of the pair of rollers 37a, 37b, and defects caused by the deformation are generated.

On the other hand, when the polarizing plate 10B is manufactured by the manufacturing device 30D, the protective film 13 is also bonded together. Therefore, the protective film 13 serves as a reinforcing film when bonding the polarizing film 11 and the protective film 12 And function. Thereby, when the polarizing film 11 and the protective film 12 are bonded together to form the laminated body 40B, the polarizing plate 10B constituting a part of the laminated body 40B is less likely to be deformed.

Furthermore, after the layered body 40B is formed, the protective film 13 is peeled off from the layered body 40B. Therefore, the manufactured polarizing plate 10B has the structure shown in FIG. 10, and the two polarizing films 11 Compared with the case where the protective film is attached to the surface, the thickness is reduced. That is, in the manufacturing method described in the modification 1-4, the thin polarizing plate 10B can be manufactured while suppressing the deformation of the polarizing plate 10B caused by the bonding portion 37. In other words, the manufacturing method of Modifications 1-4 can improve the productivity of the polarizing plate 10 and contribute to the manufacture of thin-shaped polarizing plates.

In the modified example 1-4, before the bonding step of the bonding part 37, the conveying direction of the protective film 13 that is finally peeled off is changed. Therefore, as in the case of the manufacturing method of the polarizing plate 10, the degree of freedom of the layout when the manufacturing device 30D is installed in the factory is improved. Furthermore, even if damage occurs in the protective film 13 due to the conveying direction changing portion TB1, it will not have any influence on the optical characteristics of the polarizing plate 10B. Therefore, the production efficiency of the polarizing plate 10B is improved. Furthermore, after the bonding step, the conveying direction of the protective film 13 peeled from the laminated body 40B is changed in the middle. Therefore, according to this point, the degree of freedom of layout when the manufacturing device 30D is installed in the factory is also improved.

As described above, in Modifications 1-4, the protective film 13 is peeled from the laminate 40B, and therefore, the protective film 13 can be regarded as a kind of peeling film. Accordingly, for example, the release film 21 may be used instead of the protective film 13.

Modification 1-4 is also the same as Modification 1-1, and after bonding, the step of changing the conveying direction of the peeled protective film 13 may not be provided. Or, similarly to the modification 1-2, before bonding, the process of changing the conveyance direction of the protective film 13 may not be provided.

(Variations 1-5)

The following form will be described as Modified Example 1-5, which means that the release film 21 is used in place of the protective film 13 in Modified Example 1-4, and is the same as Modified Example 1-2, before lamination. The conveying direction of the release film 21 is changed.

In the above case, the release film 21 is conveyed by the film conveying section 34 so that the width direction of the release film 21 substantially coincides with the normal direction of the virtual plane P1. Thereby, the film conveying section 34 functions as the first release film conveying section for conveying the release film 21, and the film The conveyance step of conveying the peeling film 21 by the conveyance part 34 can be regarded as a 1st peeling film conveyance step. Moreover, the film conveyance part 36 functions as a 2nd peeling film conveyance part which conveys the peeled peeling film, and the conveyance process of conveying the peeling film 21 by the film conveyance part 36 can be regarded as a 2nd peeling film conveyance process. Furthermore, as described in the description using FIGS. 4 and 5, the conveying direction changing portion TB2 functions as a conveying direction changing portion of the release film 21, and the conveying direction of the peeling film 21 is changed by the conveying direction changing portion TB2 This step can be regarded as a step of changing the conveying direction of the release film.

Modifications 1-5 correspond to the following form, that is, instead of the protective film 13 in Modifications 1-4, the release film 21 is used, and the conveying direction of the release film 21 is not changed before lamination. Therefore, there are changes The same effect as in Example 1-4.

(Second Embodiment)

The following form will be described as the second embodiment, which is a form of manufacturing a strip-shaped polarizing plate 50 with a surface protection film having a cross-sectional configuration as schematically shown in FIG. 13. The polarizing plate 50 with a surface protection film forms a liquid crystal panel by bonding it to a liquid crystal cell, for example.

As shown in FIG. 13, the polarizing plate 50 with a surface protective film is a laminated optical film including a polarizing plate 51 and a surface protective film (protective film) 52. Examples of the length in the width direction and the length in the longitudinal direction of the strip-shaped polarizing plate 50 with a surface protection film may be the same as the case of the polarizing plate 10. An example of the thickness of the polarizing plate 50 with a surface protection film is 50 μm to 300 μm.

The polarizing plate 51 is an optical film in the second embodiment having linear polarization characteristics. The polarizing plate 51 may be the polarizing plates 10, 10A, and 10B manufactured in the first embodiment.

The surface protection film 52 is a self-adhesive resin film having adhesiveness alone, a film having an adhesive layer 53 formed on one side, or the like, and is attached to the polarizing plate 51 in a peelable manner. FIG. 13 shows a surface protective film having an adhesive layer 53 formed on one side. The example of the thickness of the surface protection film 52 may be the same as that of the protection films 12 and 13. Examples of the material of the surface protection film 52 are polyethylene, polypropylene, polystyrene, and polyester. The surface protection film 52 is a film that is used when a liquid crystal cell or the like on which a polarizing plate 50 with a surface protection film is attached is distributed to the market as a liquid crystal display device. The polarizing plate 50 capable of attaching a surface protection film is peeled off.

An example of the thickness of the adhesive layer 53 is 5 μm to 30 μm. Examples of adhesives constituting the adhesive layer 53 include acrylic adhesives, epoxy adhesives, urethane adhesives, and silicone adhesives.

In the following description, unless otherwise specified, the adhesive layer 53 is formed on one side of the surface protective film 52. When the surface protective film 52 is peeled off by the polarizing plate 50 with the surface protective film attached, the adhesive layer 53 is also peeled off. Therefore, in the following description, the surface protective film 52 on which the adhesive layer 53 is formed is also referred to as the surface protective film 54. Furthermore, the surface protection film 52 with the adhesive layer 53 formed on one side is also a release film to which the adhesive layer is attached.

Next, the manufacturing method of the polarizing plate 50 with a surface protection film is demonstrated. The strip-shaped surface protection film 54 is attached to the single side of the strip-shaped polarizing plate 51 in such a way that the strip-shaped surface protection film 54 and the strip-shaped polarizing plate 51 are aligned in the longitudinal direction, thereby manufacturing a surface protection膜的polarizer 50.

In the manufacturing process of the polarizing plate 50 with a surface protection film, a belt-shaped laminated surface protection film 60 as shown schematically in FIG. 14 is used. FIG. 14 schematically shows a cross-sectional structure (or laminate structure) orthogonal to the longitudinal direction of the laminated surface protective film 60. The laminated surface protection film 60 includes a surface protection film 54 and a strip-shaped release film 61.

The peeling film 61 is a film bonded to the surface protective film 54 in a peelable manner. As shown in FIG. 14, the release film 61 is attached to the adhesive layer 53 in the surface protection film 54. The example of the release film 61 may be the same as the release film 21.

The manufacturing apparatus 70 of the polarizing plate 50 with a surface protection film is demonstrated using FIG. 15 and FIG. 16. FIG. FIG. 15 corresponds to the state where the manufacturing apparatus 70 of the polarizing plate 50 with a surface protection film is viewed from the upper side. FIG. 16 corresponds to the state where the manufacturing device 70 is viewed from the side.

In FIG. 16, for convenience of description, the thickness of the polarizing plate 51 and the laminated surface protective film 60 is emphasized, and the polarizing plate 51 and the laminated surface protective film 60 are illustrated. The laminated surface protection film 60 has a laminated structure of the surface protection film 54 and the release film 61, but is schematically shown as having a For a film with a fixed thickness, when the release film 61 has been peeled off, a thick solid line is used to indicate the peeled release film 61. For the purpose of explanation, there are also cases where, in FIG. 16, the vertical direction is also referred to as the vertical direction, and the direction orthogonal to the vertical direction is referred to as the horizontal direction. In the description of FIG. 15, there is also a case where the above-mentioned vertical direction and horizontal direction are used based on the corresponding relationship with FIG. 16.

As shown schematically in FIGS. 15 and 16, the manufacturing apparatus 70 includes film conveying parts 71, 72, 73, 74, 75, conveying direction changing parts TB3 and TB4, a peeling part 76, and a bonding part 77.

The film conveying part (optical film conveying part) 71 is a conveying mechanism for conveying the polarizing plate 51 in the longitudinal direction of the polarizing plate 51. The film transport section 71 transports the polarizing plate 51 to the bonding section 77.

The film conveyance part 71 has the some roller 71a arrange|positioned so that the rotation shaft may be mutually parallel. The number of rollers 71a is not limited to the number shown in FIGS. 15 and 16. The plurality of rollers 71a are arranged such that the extending direction of the rotation axis of the rollers is substantially consistent with the width direction of the polarizing plate 51 (or perpendicular to the longitudinal direction of the polarizing plate 51). Thereby, the film conveyance part 71 conveys the polarizing plate 51 so that the direction of the virtual plane (1st virtual plane) P3 orthogonal to the width direction of the polarizing plate 51 may be fixed. In other words, the film conveyance portion 71 conveys the polarizing plate 51 so that the normal direction of the virtual plane P3 substantially coincides with the width direction of the polarizing plate 51. In FIGS. 15 and 16, the virtual plane P3 is represented by a fixed size for the convenience of illustration, but the virtual plane P3 is a virtual infinite plane.

The film conveyance part (protective film conveyance part) 72 (refer FIG. 15) is a conveyance mechanism for conveying the laminated surface protection film 60 in the longitudinal direction of the laminated surface protection film 60. The film conveyance part 72 has the some roller 72a arrange|positioned so that the extension direction of a rotating shaft may be parallel. The number of rollers 72a is not limited to the number shown in FIG. 15.

The plurality of rollers 72a are arranged in such a way that the extending direction of their rotation axis is substantially the same as the width direction of the laminated surface protective film 60 (or orthogonal to the longitudinal direction of the laminated surface protective film 60) and is aligned with the roller The extension direction of the rotation axis of 71a intersects (in Figure 15 Orthogonal in the example). Thereby, the film conveying section 72 conveys the laminated surface protective film 60 in a manner that the direction of the virtual plane (second virtual plane) P4 orthogonal to the width direction of the laminated surface protective film 60 is fixed, and the virtual plane P4 Intersect the imaginary plane P3. In FIG. 15, the virtual plane P4 is shown with a fixed size for the convenience of illustration. However, the virtual plane P4 is a virtual infinite plane like the virtual plane P3.

The conveying direction changing unit (protective film conveying direction changing unit) TB3 is a roller (or steering lever) that rotates around an axis that intersects the width direction of the laminated surface protective film 60 conveyed by the film conveying unit 72. In other words, the conveyance direction change part TB3 is the conveyance direction change part TB when the film F of FIG. 3 is used as the laminated surface protective film 60. The conveying direction changing portion TB3 changes the conveying direction of the conveyed laminated surface protective film 60 so that the width direction of the laminated surface protective film 60 substantially coincides with the normal direction of the virtual plane P3. FIG. 15 shows an example in which the width direction of the laminated surface protection film 60 wound before the conveying direction changing portion TB3 and the rotation axis of the conveying direction changing portion TB3 intersect at about 45°. In addition, when winding the laminated surface protection film 60 on the conveyance direction change part TB3, it is preferable to wind the laminated surface protection film 60 so that the release film 61 may contact the conveyance direction change part TB3.

The film conveying section 73 is a conveying mechanism for conveying the laminated surface protective film 60 in the longitudinal direction of the laminated surface protective film 60, and the conveying direction of the laminated surface protective film 60 has been changed by the conveying direction changing section TB3. The film conveyance part 73 has the some roller 73a arrange|positioned so that the extension direction of a rotating shaft may be parallel. The number of rollers 73a is not limited to the number shown in FIGS. 15 and 16.

The plurality of rollers 73a are arranged in such a way that the extending direction of their rotation axis is substantially the same as the width direction of the laminated surface protective film 60 (or orthogonal to the longitudinal direction of the laminated surface protective film 60), and substantially It is parallel to the extending direction of the rotation axis of the roller 71a. Thereby, the film conveyance part 73 conveys the laminated surface protection film 60 so that the width direction of the laminated surface protection film 60 may substantially coincide with the normal direction of the virtual plane P3.

As described below, a peeling section 76 is provided in the conveying path of the laminated surface protective film 60 of the film conveying section 73 and the peeling film 61 is peeled from the laminated surface protective film 60. Thereby, by the film conveyance part 73, the laminated surface protection film 60 in the state where the release film 61 was peeled from the laminated surface protection film 60, ie, the surface protection film 54, is sent to the bonding part 77.

The peeling part 76 is a roller that peels the peeling film 61 from the laminated surface protective film 60. Such rollers are known as peeling rollers. The peeling part 76 is arranged so as to be in contact with the peeling film 61 during the conveyance of the laminated surface protection film 60.

The film conveying part (peeling film conveying part) 74 is a conveying mechanism for conveying the peeling film 61 in the longitudinal direction of the peeling film 61, and the peeling film 61 has been peeled off by the peeling part 76. The film conveyance part 74 has the some roller 74a arrange|positioned so that the rotation shaft may be mutually parallel. The number of rollers 74a is not limited to the number shown in FIGS. 15 and 16.

The plurality of rollers 74a are arranged in such a way that the extending direction of their rotation axis is substantially the same as the width direction of the release film 61 (or orthogonal to the longitudinal direction of the release film 61), and is substantially the same as that of the roller 71a The extension direction of the rotation axis is parallel. Thereby, the film conveyance part 74 conveys the peeling film 61 so that the width direction of the peeling film 61 may substantially coincide with the normal direction of the virtual plane P3.

The conveying direction changing section (release film conveying direction changing section) TB4 is a roller (or steering lever) that rotates around an axis that intersects the width direction of the release film 61 conveyed by the film conveying section 74. In other words, the conveyance direction change part TB4 is the conveyance direction change part TB when the film F of FIG. 3 is made into the peeling film 61. As shown in FIG. The conveyance direction change part TB4 changes the conveyance direction of the peeling film 61 conveyed so that it may cross|intersect the virtual plane P3. FIG. 15 shows an example in which the width direction of the release film 61 before being wound around the conveying direction changing portion TB4 and the rotation axis of the conveying direction changing portion TB4 cross at about 45°.

The bonding part 77 has a pair of rollers 77a, 77b bonding the polarizing plate 51 and the surface protection film 52 together. The pair of rollers 77a and 77b are arranged such that their rotation axes are parallel to each other and parallel to the extending direction of the rotation axis of the roller 71a. A pair of rollers 77a, 77b are on the thickness side of the polarizing plate 51 In the upward direction, the polarizing plate 51 is interposed and opposed to each other. The pair of rollers 77a and 77b should just be arranged so as to be separated to the extent that it can press and bond plural films fed in between them.

The bonding portion 77 presses the polarizing plate 51 and the surface protection film 52 in the thickness direction by a pair of rollers 77a and 77b, thereby bonding the polarizing plate 51 and the surface protection film 52 to form a bonding Polarizing plate 50 with surface protection film of optical film.

The film conveyance part (bonding optical film conveyance part) 75 is a conveyance mechanism for conveying the polarizing plate 50 with a surface protection film sent from the bonding part 77 in the longitudinal direction of the polarizing plate 50 with a surface protection film. The film conveyance part 75 has plural rollers 75a arrange|positioned so that the extension direction of a rotating shaft may be parallel. The number of rollers 75a is not limited to the number shown in FIGS. 15 and 16.

The plurality of rollers 75a are arranged in such a way that the extension direction of their rotation axis is substantially the same as the width direction of the polarizing plate 50 with surface protection film (or the length direction of the polarizing plate 50 with surface protection film is positive Cross), and is substantially parallel to the extending direction of the rotation axis of the roller 71a. Thereby, the film conveyance part 75 conveys the polarizing plate 50 with a surface protection film so that the width direction of the polarizing plate 50 with a surface protection film substantially coincides with the normal direction of the virtual plane P3.

The manufacturing method of the polarizing plate with a surface protection film using the manufacturing apparatus 70 is demonstrated. When manufacturing the polarizing plate 50 with a surface protection film, the film conveyance part 71 conveys the polarizing plate 51 which is an optical film to the bonding part 77 (optical film conveyance process). The film conveyance part 71 conveys the polarizing plate 51 so that the direction of the virtual plane P3 orthogonal to the width direction of the polarizing plate 51 may be fixed. In this case, as shown in FIG. 15, when the manufacturing apparatus 70 is viewed from the upper side, the polarizing plate 51 is conveyed in the A4 direction indicated by the hollow arrow.

When the strip-shaped polarizing plate 51 is the polarizing plates 10, 10A, and 10B described in the first embodiment, the film conveying section 71 may be a conveying mechanism that is substantially the same as that produced in the first embodiment. After the plates 10, 10A, and 10B, the conveying mechanism for conveying these polarizing plates is the same. Or, when preparing the polarizing plate 51 as the original roll, In the conveyance step of the optical plate 51, the polarizing plate 51 is sent out from the original sheet roll, and the film conveying section 71 conveys the polarizing plate 51 to the bonding section 77.

As shown in FIG. 16, as long as the direction of the imaginary plane P3 orthogonal to the width direction of the polarizing plate 51 is fixed, the conveying path of the polarizing plate 51 is not particularly limited.

While conveying the polarizing plate 51, the belt-shaped laminated surface protective film 60 is conveyed by the film conveyance part 72 (1st protective film conveyance process). The film conveyance part 72 conveys the laminated surface protection film 60 so that the virtual plane P4 orthogonal to the width direction of the laminated surface protection film 60 and the virtual plane P3 may cross (orthogonal in FIG. 15). In this case, as shown in FIG. 15, when the manufacturing apparatus 70 is viewed from the upper side, the laminated surface protection film 60 is conveyed in the A5 direction indicated by the hollow arrow.

Usually, a belt-shaped laminated surface protection film 60 is prepared as the original sheet roll. Therefore, in the step of conveying the laminated surface protective film 60 by the film conveying section 72, the laminated surface protective film 60 is sent out from the original roll, and the laminated surface protective film 60 is conveyed by the film conveying section 72.

The conveying direction changing section TB3 changes the conveying direction of the laminated surface protective film 60 conveyed by the film conveying section 72 so that the width direction of the laminated surface protective film 60 coincides with the normal direction of the imaginary plane P3 (The first protective film transport direction change step). In the step of changing the conveying direction of the laminated surface protective film 60, the laminated surface protective film 60 is wound in the conveying direction in advance so that the release film 61 in the laminated surface protective film 60 is in contact with the conveying direction changing portion TB3 Change part TB3. As a result, even if damage occurs in the release film 61 due to load or friction caused by the conveying direction changing portion TB3, since the release film 61 will be peeled off in a subsequent step, it will not affect the optics of the polarizing plate 50 with surface protection film. Characteristics have any impact.

The laminated surface protection film 60 whose conveying direction has been changed is conveyed to the bonding section 77 by the film conveying section 73. The film conveyance part 73 conveys the laminated surface protection film 60 so that the width direction of the laminated surface protection film 60 may substantially coincide with the normal direction of the virtual plane P3.

In the above-mentioned conveyance process, the peeling film 61 is continuously peeled from the laminated surface protective film 60 by the peeling part 76 (peeling process). Thereby, in the conveying process of the film conveying section 73, after the peeling step is performed by the peeling section 76, the surface protection film 54 is conveyed by the film conveying section 73, that is, the surface protection with the adhesive layer 53 formed on one side膜52。 Film 52.

The film conveyance part 73 conveys the surface protection film 54 to the bonding part 77 so that the adhesive layer 53 may be located on the polarizing plate 51 side. Moreover, when the film conveyance part 73 conveys the surface protection film 54 to the bonding part 77, it conveys the surface protection film 54 so that the longitudinal direction of the polarizing plate 51 and the surface protection film 54 may be the same, and the conveyance direction of these may be the same. In FIG. 16, the bonding part 77 is conveyed by the surface protection film 54 so that the adhesive layer 53 is in contact with the lower surface of the polarizing plate 51.

After the release film 61 is peeled off from the laminated surface protection film 60, the release film 61 is conveyed by the film conveying section 74 so that the width direction of the release film 61 substantially coincides with the normal direction of the virtual plane P3.

The conveyance direction change part TB4 changes the conveyance direction of the peeling film 61 conveyed by the film conveyance part 74 so that it may cross with the virtual plane P3. Specifically, the conveying direction of the peeling film 61 is changed so that the virtual plane orthogonal to the width direction of the peeling film 61 crosses (for example, orthogonal to) the virtual plane P3. In FIG. 15, the conveyance direction of the peeling film 61 is changed to the hollow arrow A6 direction. After the release film 61 whose conveying direction is changed in the above-mentioned manner is conveyed by a fixed distance, it is preferably wound on a roll, for example.

The pair of rollers 77a and 77b, which are one of the bonding parts 77, press the polarizing plate 51 and the surface protection film 52 that are continuously fed between them, thereby bonding the surface protection film 54 to the polarizing plate 51 (bonding step). Thereby, the polarizing plate 50 with the surface protective film in which the polarizing plate 51 and the surface protective film 52 are bonded via the adhesive layer 53 is formed.

The polarizing plate 50 with a surface protection film is conveyed by the film conveyance part 75 so that the width direction of the polarizing plate 50 with a surface protection film substantially coincides with the normal direction of the virtual plane P3. The polarizing plate 50 with a surface protection film conveyed by the film conveying part 75 is a belt shape. Therefore, the polarizing plate 50 with surface protection film conveyed by the film conveying unit 75 can also be wound around Roll. Alternatively, a step of processing (for example, cutting) the strip-shaped polarizing plate 50 with a surface protection film to a desired size may be performed.

In the manufacturing method of the polarizing plate 50 with a surface protection film using the manufacturing apparatus 70, as shown in FIG. 15, when the manufacturing apparatus 70 is viewed from the upper side, the polarizing plate 51 is conveyed in the A4 direction while the polarizing plate 51 and The surface protection film 54 is bonded to form a polarizing plate 50 with a surface protection film. In the manufacturing method of the polarizing plate 50 with a surface protection film, the conveying direction of the laminated surface protection film 60 including the surface protection film 54 in the conveying process until the surface protection film 54 is fed to the bonding part 77 Make changes. A specific description will be given using the A4 direction and the A5 direction shown in FIG. 15.

As described above, the polarizing plate 51 is conveyed in the A4 direction. On the other hand, the laminated surface protection film 60 is first conveyed in the A5 direction which crosses the A4 direction (orthogonal in FIG. 15). After that, the conveying direction of the laminated surface protective film 60 is changed so that the width direction of the laminated surface protective film 60 is orthogonal to the virtual plane P3.

Therefore, the manufacturing method of the polarizing plate 50 with a surface protection film using the manufacturing apparatus 70 has at least the same effect as the manufacturing method of the polarizing plate 10 using the manufacturing apparatus 30 of the first embodiment. That is, the layout of the manufacturing device 70 has a high degree of freedom, and the factory space in which the manufacturing device 70 is installed can be effectively utilized. Moreover, the workability is also good, and the productivity of the polarizing plate 50 with a surface protection film can also be improved.

When the layered surface protection film 60 is wound around the conveying direction changing part TB3 and the conveying direction is changed, the release film 61 contacts the conveying direction changing part TB3. Therefore, there is also the same effect as when the release film 21 is wound around the conveying direction changing portion TB1 in the case of the first embodiment.

Moreover, in the manufacturing method of the polarizing plate 50 with a surface protective film using the manufacturing apparatus 70, after peeling the peeling film 61 from the laminated surface protective film 60, the conveyance direction of the peeling film 61 is also changed. Thereby, as in the case where the conveying direction of the peeling film 21 after peeling is changed in the first embodiment, the freedom of the layout of the manufacturing apparatus 70 is further increased. Improved, more efficient and flexible use of factory space.

(Variation 2-1)

In the manufacturing method of the polarizing plate demonstrated using FIG. 15 and FIG. 16, after peeling the peeling film 61 from the laminated surface protective film 60, the process of changing the conveyance direction of the peeling film 61 may be provided. However, this step may not be provided. That is, like the manufacturing apparatus 70A shown in FIG. 17, the conveyance direction change part TB4 may not be provided. Even in this case, the conveying direction of the laminated surface protection film 60 is changed, and therefore, the degree of freedom of layout when the manufacturing device 70A is installed in the factory can be improved. Furthermore, the productivity of the polarizing plate 50 with a surface protection film can also be improved.

(Modification 2-2)

In the manufacturing method of the polarizing plate demonstrated using FIG. 15 and FIG. 16, there is a process of changing the conveyance direction of the laminated surface protective film 60. However, this step may not be provided. That is, like the manufacturing apparatus 70B shown in FIG. 18, the conveyance direction change part TB3 may not be provided, and the film conveyance part 72 may not be provided. In this case, it is only necessary to convey the laminated surface protection film 60 by the film conveyance part 73 so that the width direction of the laminated surface protection film 60 substantially coincides with the normal direction of the virtual plane P3. For example, when the laminated surface protection film 60 is prepared as the original sheet roll, the laminated surface protection film 60 sent from the original sheet roll is conveyed by the film conveyance part 73. In the modified example 2-2, the conveying direction of the release film 61 is also changed, and therefore, the degree of freedom of layout when the manufacturing device 70B is installed in a factory can be improved.

In the description of the second embodiment and its modified examples so far, the surface protection film for protecting the surface of the polarizing plate has been exemplified as the protection film. However, for example, the protective film may also be the following protective film (so-called carrierless film) in the form of an adhesive layer formed on one side of a polarizing plate to attach a polarizing plate with a surface protective film to a liquid crystal cell. The protective film (the so-called carrierless film) is used to prevent dirt and the like from adhering to the adhesive layer until the polarizing plate with the surface protective film is attached to the liquid crystal cell. This corresponds to, for example, a form in which the surface protection film 52 is peelably bonded to the adhesive layer 53.

In addition, in the description of the second embodiment and its modification examples, the optical film is not limited to a polarizing plate. For example, the optical film may be a retardation film. In this case, the bonded optical film is a phase difference plate.

The various embodiments and modifications of the present invention have been described above, but the present invention is not limited to the various embodiments and modifications illustrated. The present invention is represented by the scope of the patent application and is intended to include the meaning equivalent to the scope of the patent application And all changes within the scope.

10‧‧‧Polarizing plate (bonding optical film)

11‧‧‧Polarizing film (optical film)

12‧‧‧Protective film (Second protective film)

13‧‧‧Protective film

20‧‧‧Laminated protective film (protective film with peeling film attached to it in a peelable manner)

21‧‧‧Peeling film

30‧‧‧Manufacturing device (manufacturing device for laminating optical film)

31‧‧‧Film transport department (optical film transport department)

31a‧‧‧roller

32‧‧‧Film Transport Department

32a‧‧‧roller

34‧‧‧Film transport section (1st release film transport section)

34a‧‧‧roller

35‧‧‧Film transport section (Laminated optical film transport section)

35a‧‧‧roller

36‧‧‧Film transport section (release film transport section, second release film transport section)

36a‧‧‧roller

37‧‧‧Lamination Department

37a‧‧‧roller

37b‧‧‧roller

38‧‧‧Striping Department

40‧‧‧Layered body

P1‧‧‧Imaginary plane (1st imaginary plane)

TB1‧‧‧Transfer direction change section (protective film transport direction change section)

TB2‧‧‧Transfer direction change section (Release film transport direction change section)

Claims (27)

A method for manufacturing a laminated optical film, comprising: an optical film conveying step of conveying a strip-shaped optical film in a manner that fixes the direction of a first imaginary plane orthogonal to the width direction of the optical film; a first protective film A conveying step, which conveys the protective film in a strip shape so that a second imaginary plane orthogonal to the width direction of the protective film intersects the first imaginary plane; the first protective film conveying direction changing step, which causes the protection The width direction of the film is consistent with the normal direction of the first imaginary plane, and the conveying direction of the protective film from the first protective film conveying step is changed; and the laminating step is to make mutual The length direction is consistent, and the protective film whose conveying direction has been changed in the first protective film conveying direction changing step and the optical film conveyed in the optical film conveying step are continuously bonded to form a bonding A tape-shaped bonded optical film formed of the optical film and the protective film. The method for manufacturing a laminated optical film according to claim 1, wherein in the first protective film conveying direction changing step, the protective film is wound on a roller that rotates about the following axis The conveying direction is changed; the above-mentioned axis is the axis of the direction intersecting the width direction of the protective film in the first protective film conveying step. The method for manufacturing a laminated optical film according to claim 1 or 2, wherein in the first protective film transport step, the protective film is transported in a state where a strip-shaped release film is peelably attached to the protective film, In the said 1st protective film conveyance direction change process, the conveyance direction of the said protective film is changed in the state in which the said release film was stuck to the said protective film. Such as the manufacturing method of the laminated optical film of claim 3, wherein the first protective film In the step of changing the feeding direction, the surface of the two sides of the protective film on the side where the release film is pasted is wound in a state where the release film is pasted, and the roll that rotates around the following axis is brought into contact By winding around this roller, the conveyance direction of the said protective film is changed, and the said axis|shaft is the axis|shaft of the direction crossing the width direction of the said protective film in the said 1st protective film conveyance step. According to claim 3, the method for manufacturing a laminated optical film further includes: a peeling step of continuously peeling the peeling film from the protective film whose conveying direction is changed in the first protective film conveying direction changing step; and The film conveying step includes conveying the peeling film peeled in the peeling step so that the width direction of the peeling film coincides with the normal direction of the first imaginary plane, and in the laminating step, the peeling film The peeled protective film is bonded to the optical film. The method of manufacturing a laminated optical film according to claim 1 or 2, wherein in the bonding step, the protective film is peelably bonded to the strip-shaped peeling film, so that the peeling film is located on the The optical film is a method on the opposite side, the protective film is bonded to the optical film, and the manufacturing method of the bonded optical film further includes a bonding optical film transport step, which makes the width direction of the bonded optical film and the The normal direction of the first imaginary plane is the same, and the laminated optical film formed in the bonding step is transported; the peeling step is to peel off the laminated optical film transported in the laminated optical film transport step Film peeling; and a peeling film conveying step of conveying the peeling film peeled in the peeling step so that the width direction of the peeling film coincides with the normal direction of the first virtual plane. For example, the manufacturing method of the laminated optical film of claim 5, which further includes a step of changing the transport direction of the release film. The step of changing the transport direction of the release film changes the transport direction of the release film from the release film transport step to the same The direction where the first imaginary plane intersects. The method of manufacturing a laminated optical film of claim 7, wherein in the step of changing the transport direction of the release film, the transport direction of the release film is adjusted by winding the release film on a roller rotating around the following axis With a change, the axis is an axis in a direction intersecting the width direction of the release film in the release film transport step. The manufacturing method of the laminated optical film of Claim 1 or 2 in which in the said bonding process, the said protective film is peelably bonded to the said optical film. The method for manufacturing a laminated optical film according to claim 1 or 2, wherein in the bonding step, a second protective film in a tape shape different from the protective film is bonded to the optical film and the protective film is bonded The opposite side of the membrane. The method for manufacturing a laminated optical film according to claim 1 or 2, wherein in the bonding step, the protective film is releasably bonded to the optical film, and the second belt-shaped second film is different from the protective film. A protective film is bonded to the surface of the optical film opposite to the surface on which the protective film is bonded, thereby obtaining the bonded optical film in the state where the second protective film is bonded, and the bonded optical The method of manufacturing the film further includes: a laminating optical film transport step of transporting the obtained laminated optical film so that the width direction of the laminated optical film coincides with the normal direction of the first virtual plane; and a peeling step , Which peels off the protective film from the laminated optical film conveyed in the laminated optical film conveyance step; and a second protective film conveyance step in which the width direction of the protective film is aligned with the normal line of the first virtual plane Transported in the same direction in the above peeling step The above protective film. The manufacturing method of the laminated optical film of claim 11, which further includes a second protective film conveying direction changing step, the second protective film conveying direction changing step will be the protective film conveyed from the second protective film conveying step The conveying direction is changed to the direction intersecting the above-mentioned first imaginary plane. The method of manufacturing a laminated optical film according to claim 12, wherein in the second protective film conveying step, the protective film is wound on a roller rotating around the following axis to convey the protective film With a change, the axis is an axis in a direction intersecting the width direction of the protective film in the second protective film conveying step. A method for manufacturing a laminated optical film, comprising: an optical film transport step, which transports a strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; a protective film transport step, which In the state where the strip-shaped release film is peelably attached, the strip-shaped protective film is conveyed so that the width direction of the protective film coincides with the normal direction of the imaginary plane; the peeling step, which continuously starts from the above The protective film peels the peeling film; the peeling film conveying step, which conveys the peeling film peeled in the peeling step so that the width direction of the peeling film coincides with the normal direction of the imaginary plane; the peeling film conveying direction is changed The step of changing the conveying direction of the peeling film from the step of conveying the peeling film to the direction intersecting the imaginary plane; and the laminating step, which is to make the length directions of each other consistent, protect the The protective film conveyed in the film conveying step is bonded to the optical film conveyed in the optical film conveying step to form a tape-shaped bonded optical film formed by bonding the optical film and the protective film; And The peeling step is performed before or after the bonding step. The method for manufacturing a laminated optical film according to claim 14, wherein the peeling step is performed before the bonding step, and in the bonding step, the protective film after the peeling film has been peeled off in the peeling step is pasted Suitable for the above optical film. The method for manufacturing a laminated optical film according to claim 14, wherein the peeling step is performed after the bonding step, and in the bonding step, the peeling film is placed on the opposite side of the optical film. In the state in which the peeling film is attached, the protective film is bonded to the optical film, and in the peeling step, the peeling film is peeled from the bonded optical film formed in the bonding step. The method for manufacturing a laminated optical film according to any one of claims 14 to 16, wherein in the step of changing the conveying direction of the release film, the release film is wound around a roller that rotates around the following axis. The transport direction of the release film is changed, and the axis is an axis in a direction crossing the width direction of the release film in the release film transport step. The manufacturing method of the laminated optical film of any one of claims 14 to 16, wherein in the bonding step, the protective film is peelably bonded to the optical film. The method for manufacturing a laminated optical film according to any one of claims 14 to 16, wherein in the bonding step, a tape-shaped second protective film different from the protective film is bonded to the optical film The side opposite to the side with the above protective film. A method for manufacturing a laminated optical film, comprising: an optical film conveying step of conveying a strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; a first release film conveying step , Which makes the width direction of the release film and the above false The strip-shaped release film is conveyed in a way that the normal direction of the plane is consistent; the protective film conveying step is to convey the strip-shaped protective film in such a way that the width direction of the protective film is consistent with the normal direction; the laminating step, which The optical film, the release film, and the protective film are bonded to form a bonded optical film so that the longitudinal directions of each other are aligned and the optical film is sandwiched between the release film and the protective film; the optical film is bonded and transported A step of transporting the laminated optical film formed in the bonding step in such a way that the width direction of the laminated optical film coincides with the normal direction; the peeling step is transported from the transporting step of the laminated optical film The above-mentioned laminated optical film peels the above-mentioned release film; a second release film conveying step of transporting the above-mentioned release film peeled in the above-mentioned peeling step so that the width direction of the above-mentioned release film coincides with the normal direction; and The film conveying direction changing step is to change the conveying direction of the peeling film from the second peeling film conveying step to a direction crossing the virtual plane. The method for manufacturing a laminated optical film according to any one of claims 1 to 2, 14 to 16, wherein the optical film is a polarizing film obtained by subjecting a polyvinyl alcohol-based resin film to a stretching process and a crosslinking process. A manufacturing device for a laminated optical film, comprising: an optical film conveying section that conveys a strip-shaped optical film in a manner that fixes the direction of a first imaginary plane orthogonal to the width direction of the optical film; and a protective film conveying section , Which conveys the belt-shaped protective film in such a way that the second imaginary plane orthogonal to the width direction of the protective film crosses the first imaginary plane; the protective film conveying direction changing section, which makes the width direction of the protective film And on The normal direction of the imaginary plane is the same, and the conveying direction of the protective film from the protective film conveying section is changed; and the laminating section, which continuously aligns the length directions of each other The protective film whose conveying direction is changed by the protective film conveying direction changing section is bonded to the optical film conveyed by the optical film conveying section to form a tape-shaped sticker in which the optical film and the protective film are bonded合optical film. A manufacturing device for a laminated optical film, comprising: an optical film conveying part that conveys a strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; a protective film conveying part, which In the state where the strip-shaped release film is peelably attached, the strip-shaped protective film is conveyed so that the width direction of the protective film coincides with the normal direction of the imaginary plane; the peeling part, which is continuously from the above The protective film peels the peeling film; a peeling film conveying section that conveys the peeling film peeled by the peeling section so that the width direction of the peeling film coincides with the normal direction of the imaginary plane; the peeling film conveying direction changing section , Which changes the conveying direction of the peeling film from the peeling film conveying section to a direction that intersects the imaginary plane; and the laminating section which conveys the protective film in such a way that the longitudinal directions of each other are aligned The protective film conveyed by the section is bonded to the optical film conveyed by the optical film conveying section to form a tape-shaped bonded optical film in which the optical film and the protective film are bonded. A manufacturing device for a laminated optical film, comprising: an optical film conveying part that conveys a strip-shaped optical film in a manner that fixes the direction of an imaginary plane orthogonal to the width direction of the optical film; A first release film conveying section that conveys a strip-shaped release film so that the width direction of the release film coincides with the normal direction of the imaginary plane; a protective film conveying section that makes the width direction of the protective film and the above The belt-shaped protective film is conveyed in a way that the normal direction is the same; the laminating part, the optical film and the peeling film are sandwiched by the peeling film and the protective film so that the longitudinal directions of each other are the same. And the protective film are bonded together to form a bonded optical film; a bonded optical film conveying section that conveys the bonding formed by the bonding section so that the width direction of the bonded optical film coincides with the normal direction Optical film; peeling section, which peels the peeling film from the laminating optical film conveyed by the laminating optical film conveying section; a second peeling film conveying section, which makes the width direction of the peeling film and the normal direction Conveying the peeling film peeled off by the peeling section in a consistent manner; and a peeling film conveying direction changing section that changes the conveying direction of the peeling film from the second peeling film conveying section to cross the imaginary plane direction. A peeling method of a peeling film, which is a method of peeling off the peeling film from an optical film to which a strip-shaped peeling film is releasably attached, and includes: an optical film conveying step, which is aligned with the width direction of the optical film The orientation of the orthogonal imaginary plane is fixed, and the optical film is transported in the state where the release film is attached; a peeling step, which peels the release film from the optical film transported in the optical film transport step; The peeling film conveying step, which conveys the peeling in the peeling step so that the width direction of the peeling film coincides with the normal direction of the imaginary plane Film; and the peeling film conveying direction changing step, which changes the conveying direction of the peeling film from the peeling film conveying step to a direction crossing the imaginary plane. The peeling method of claim 25, wherein in the optical film transport step, the optical film is bonded with the peeling film in a state where a tape-shaped protective film is bonded. The peeling method of claim 25 or 26, wherein, in the step of changing the conveying direction of the peeling film, the conveying direction of the peeling film is changed by winding the peeling film on a roller rotating around the following axis, The said axis|shaft is the axis|shaft of the direction which cross|intersects the width direction of the said peeling film in the said peeling film conveyance process.

Images