KR101782665B1 - Separation method and separation device - Google Patents

Abstract

A peeling method and peeling apparatus capable of continuously peeling a lightly peeling film continuously from a film laminate such that a pressure-sensitive adhesive layer is not left on the light-peeling film side. By controlling the rotation speed of the nip roller forming the second nip 2, the tension of the light separation film 31 to be conveyed is controlled to be constant (tension control). By controlling the rotation speed of the nip roller forming the third nip 3, the tension of the transported heavy film 32 is controlled to be constant (tension control). Then, the film laminate 30 is continuously taken out from the first nip 1, and the light-releasing film 31 and the heavy-weight film 32 are continuously conveyed under the tension. As a result, the light-releasing film 31 is continuously and stably peeled off from the film laminate 30 on the peeling roller 4.

Description

[0001] SEPARATION METHOD AND SEPARATION DEVICE [0002]

The present invention relates to a pressure sensitive adhesive tape comprising a pressure sensitive adhesive layer, a long peeling film having a long length, and a light peeling film having a long length which can be peeled from the pressure sensitive adhesive layer with a peeling force smaller than that of the heavy peeling film, The present invention relates to a peeling method and a peeling apparatus for conveying a long film laminate obtained by laminating a heavy loose film, a pressure-sensitive adhesive layer and a light-peeling film in this order, and peeling the peeling film continuously from the film laminate .

Currently, a liquid crystal display device in which a polarizing plate is bonded to both surfaces of a liquid crystal panel is generally manufactured. The manufactured liquid crystal display device is modularized and then subjected to various assembling processes to become various products (final products) such as notebook type personal computers, mobile devices such as mobile phones, and large-sized televisions.

The polarizing plate is provided for joining to a sheet-like liquid crystal panel by pulling out a long polarizing plate raw material wound in a roll shape and cutting it into a predetermined length. The polarizing plate is constituted by laminating, for example, a pressure-sensitive adhesive layer, a polarizing film, a pressure-sensitive adhesive layer and a protective film on a release film in this order. One of the pressure-sensitive adhesive layers of the pressure-sensitive adhesive layer is formed so as to bond a polarizing film to a polarizing film and to bond the polarizing film to the liquid crystal panel. Among the pressure-sensitive adhesive layers, the other pressure-sensitive adhesive layer is formed for bonding a protective film to the polarizing film.

Generally, the pressure-sensitive adhesive layer in the polarizing plate is formed by bonding a pressure-sensitive adhesive layer laminated on a release film (and a protective film) to a polarizing film. Specifically, the pressure-sensitive adhesive layer comprises a pressure-sensitive adhesive layer, a heavy-weight continuous film having a long length, and a light-exfoliation film having a long length which can be peeled off from the pressure-sensitive adhesive layer with a peeling force smaller than that of the heavy- The release film is peeled off from the long film laminate having the adhesive layer and the light release film laminated in this order, and then the pressure-sensitive adhesive layer is bonded to the polarizing film, The pressure-sensitive adhesive layer is formed. The film laminate may also be referred to as a non carrier film (so-called double-sided tape).

Conventionally, there have been proposed various peeling apparatuses for peeling off the light-releasing film from the film laminate. For example, Patent Document 1 discloses a separate film peeling device (peeling film) for preventing the tension of the web from fluctuating when peeling a separate film (light-releasing film) from a web . Patent Document 2 discloses that the first sheet (light-releasing film) can be smoothly peeled off from the sheet (film laminate), and dust or the like adheres to the second sheet (heavy-weight film and pressure-sensitive adhesive layer) A transfer detachment device is disclosed.

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2002-201439 (published on July 19, 2002) [Patent Document 2] Japanese Laid-Open Patent Publication No. 11-208985 (published on Aug. 3, 1999)

In the separate film peeling apparatus described in Patent Document 1, as shown in Fig. 1, tension is exerted only on the separate film. That is, while the tension of the separate film is controlled, the web on which the separate film is peeled is controlled in speed (winding control). In the transfer separation apparatus described in Patent Document 2, tension is exerted on the sheet, the first sheet and the second sheet by separating them as described in paragraph [0024] and Fig. 1. However, There is no specific description as to what kind of tension is applied. That is, in the transfer separation apparatus described in Patent Document 2, the tension is applied only to the sheet, the first sheet and the second sheet.

When peeling the light-releasing film from the film laminate, it is necessary to prevent the pressure-sensitive adhesive layer from remaining on the light-releasing film side. However, in the above conventional peeling apparatus, there is no particular consideration (description) as to what kind of tension is to be exerted specifically for the film (sheet) corresponding to the heavy-weight film and light-releasing film. Therefore, in the conventional peeling apparatus, there is a problem that the peeling method of the film (sheet) becomes unstable and an adhesive layer (transfer layer) corresponding to the pressure-sensitive adhesive layer remains on the film (sheet) side.

When the delamination method of the delamination film becomes unstable, a phenomenon occurs in which the pressure-sensitive adhesive layer is divided into the middle-peel film side and the delamination film side (specifically, the pressure- sensitive adhesive layer is not peeled off from the delamination film, Pull or do it). Particularly, when the cross section in the width direction of the film laminate to be peeled is a cut surface, the above-mentioned phenomenon tends to occur because fine peaks and valleys (so-called roughness) are present in the cross section. Even if the pressure-sensitive adhesive layer causing the above phenomenon is bonded to the polarizing film, a polarizing plate having excellent quality can not be produced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems and its main object is to provide a peeling method and a peeling apparatus capable of continuously peeling off a lightly peeling film from a film laminate so that a pressure- And the like.

In order to solve the above problems, the peeling method according to the present invention is characterized in that it comprises a pressure-sensitive adhesive layer, a long peeling film having a long length, and a peeling layer having a length capable of peeling from the peeling layer A long film laminate composed of a long light peeling film and laminated thereon in the order of the heavy film, the pressure-sensitive adhesive layer and the light peeling film is conveyed, and a peeling roller is used from the film laminate And the tension of the light release film being conveyed and the tension of the heavy release film are controlled so as to be constant, respectively, so that the direction of conveyance of the heavy release film relative to the conveyance direction of the light separation film Is changed along the peeling roller.

According to the above arrangement, the tension of the light release film and the tension of the heavy leash film are controlled to be constant (tension control), that is, the tension of the light separation film being conveyed and the tension of the heavy- , The wrinkle is less likely to occur on the light-scattering film and the heavy-weight wrinkle film, and the peeling position is not likely to move from the peeling roller (the peeling position can be stabilized). Therefore, the light-releasing film can be stably peeled off without leaving the pressure-sensitive adhesive layer on the light-releasing film side. Thereby, it is possible to provide a peeling method capable of stably peeling the light-peeling film continuously from the film laminate so that the pressure-sensitive adhesive layer is not left on the light-peeling film side.

Further, in the peeling method according to the present invention, it is more preferable to change the conveying direction of the light-releasing film along the peeling roller. In the peeling method according to the present invention, it is more preferable to control the tensile force of the light peeling film and the tensile strength of the heavy peeled film to be conveyed respectively to 50 N or more. In the peeling method according to the present invention, it is more preferable that the tension of the transported heavy film is larger than or equal to the tension of the light-releasing film. In the peeling method according to the present invention, it is more preferable that the angle of the direction in which the heavy loose film is conveyed with respect to the conveying direction of the light-releasing film is 35 degrees or more and 180 degrees or less.

By these methods, the light-releasing film can be continuously and more reliably peeled from the film laminate so that the pressure-sensitive adhesive layer is not left on the light-releasing film side.

In the peeling method according to the present invention, the cross section in the width direction of the film laminate may be a cut surface. According to the above configuration, since the light-releasing film can be stably peeled continuously and continuously, even if the cross-section in the width direction of the peelable film laminate is a cut surface, that is, even if there is a minute unevenness (so- The pressure-sensitive adhesive layer is not left on the film side.

Further, in the peeling method according to the present invention, the width of the film laminate is more preferably 200 mm or more.

In order to solve the above problems, the peeling apparatus according to the present invention is characterized in that the peeling apparatus comprises a pressure-sensitive adhesive layer, a heavy-weight strip film having a long length, and a light- And a peeling device for continuously peeling the lightly peelable film from the film laminate, wherein the peelable film, the pressure-sensitive adhesive layer and the light-releasing film are laminated in this order, A control section for controlling the tension of the light separation film to be conveyed and the tension of the heavyweight film to be constant, respectively, and a control section for controlling the tension of the light separation film And a measuring section for measuring the tension of the heavy-duty film.

According to the above configuration, the tension of the light separation film being conveyed and the tension of the heavy-weight film are controlled (tension control) so as to be constant by the control section, (Peeling position) can be stabilized, and it is possible to prevent wrinkles from being generated in the light-scattering film and the heavy-weight film, and to prevent the peeling position from moving from the peeling roller. Therefore, the light-releasing film can be stably peeled off without leaving the pressure-sensitive adhesive layer on the light-releasing film side. Thereby, it is possible to provide a peeling apparatus capable of continuously and reliably peeling the light-peeling film from the film laminate so that the pressure-sensitive adhesive layer is not left on the light-peeling film side.

It is more preferable that the peeling apparatus according to the present invention further comprises a variable guide roller for arbitrarily changing the angle of the conveying direction of the heavy loose film with respect to the conveying direction of the light separation film. According to the above configuration, depending on the kind of the film laminate, that is, depending on various conditions such as the material, properties, and thickness of the light-releasing film, the pressure-sensitive adhesive layer and the heavy- It is possible to change the angle of the conveying direction of the conveying path. Thereby, it is possible to provide a peeling apparatus capable of continuously peeling the light-peeling film from the film laminate more stably.

The peeling apparatus according to the present invention further comprises a conveying roller for conveying the light-releasing film and the heavy-weighted film after peeling, and the measuring section is provided on the conveying roller, It is more preferable that a fixed guide roller for adjusting the conveying direction of the release film and the heavy film is further provided between the variable guide roller and the conveying roller. According to the above configuration, even when the angle of the heavy-duty film in the conveying direction with respect to the conveying direction of the light-separating film is changed, the contact angle of the lightly-separating film and the heavy-weight film in the conveying roller can be made constant by the fixed guide roller . In other words, since the measurement conditions of the tension of the light-releasing film and the tension of the heavy-weight film by the measuring unit can be always kept constant, the tension control by the control unit can be further stably performed. Thereby, it is possible to provide a peeling apparatus capable of continuously peeling the light-peeling film from the film laminate more stably.

According to the peeling method and peeling apparatus of the present invention, since the tension of the light peeling film and the tensile strength of the heavy peeling film are constant and do not fluctuate, the light peeling film can be stably . ≪ / RTI > Thereby, it is possible to provide a peeling method and a peeling apparatus which can stably and reliably peel off the light-peeling film from the film laminate so that the pressure-sensitive adhesive layer is not left on the light-peeling film side.

Other objects, features, and advantages of the present invention will be fully understood by the following description. The advantages of the present invention will become apparent from the following description with reference to the accompanying drawings.

Fig. 1 shows an example of a peeling apparatus according to the present invention, and is a front view showing a schematic structure.
Fig. 2 shows another embodiment of the peeling apparatus according to the present invention, and is a front view showing a schematic structure.

The peeling apparatus according to the present invention is characterized in that the peeling apparatus comprises a pressure-sensitive adhesive layer, a heavy-weight continuous film having a long length, and a light-exfoliation film having a long length which can be peeled off from the pressure-sensitive adhesive layer with a peeling force smaller than that of the heavy- A peeling apparatus for carrying a long film laminate comprising a film, a pressure-sensitive adhesive layer and a light-releasing film laminated in this order, and continuously separating the light-releasing film from the film laminate, wherein the light- A control section for controlling the tension of the light release film to be transported and the tension of the heavy release film to be constant, and a control section for controlling the tension of the light separation film and the tension And a measurement unit for measuring the measurement result.

The peeling method according to the present invention is a peeling method comprising a pressure-sensitive adhesive layer, a heavy-weight continuous film having a long length, and a light-exfoliation film having a long length which can be peeled off from the pressure-sensitive adhesive layer with a peeling force smaller than that of the heavy- A peeling method in which a long film stacked body obtained by laminating a heavyweight film, a pressure-sensitive adhesive layer and a light-releasing film in this order is conveyed and a lightly peeling film is continuously peeled from the film stack by using a peeling roller And the conveying direction of the heavyweight film with respect to the conveying direction of the lightly peeling film is changed along the peeling roller while controlling the tension of the lightly peeling film being conveyed and the tension of the heavyweight film to be constant.

In the present invention, the term " tension " refers to the stress applied per unit time and per unit area of the film laminate, light-releasing film or heavy-weight film.

[Embodiment 1]

An embodiment of the present invention will be described with reference to Fig.

First, an example of a film laminate subjected to peeling by the peeling apparatus according to the present invention will be described. Wherein the film laminate comprises a pressure-sensitive adhesive layer, a heavy-weight continuous film having a long length, and a light-exfoliation film having a long length that can be peeled from the pressure-sensitive adhesive layer with a peeling force smaller than that of the heavy- A pressure-sensitive adhesive layer, and a light-releasing film in this order. The film laminate may also be referred to as a non carrier film (so-called double-sided tape).

Examples of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer include known pressure-sensitive adhesives comprising, as a main component, a polymer such as acrylic resin or polyurethane resin. In particular, when transparency is required, a known pressure-sensitive adhesive containing an acrylic resin as a main component is more preferable. The known pressure-sensitive adhesive is a viscoelastic substance which is also referred to as a pressure-sensitive adhesive and is adhered to the surface (adhered surface) of the adherend (pressure-sensitive adhesive) When peeled off, it has the property that the adhesive can be pulled off (without leaving a substantial trace) so that the adhesive does not remain on the surface (adhered surface) side (provided that the adherend has strength to withstand pulling-off). The pressure-sensitive adhesive layer can be formed, for example, by applying a solution prepared by dissolving the pressure-sensitive adhesive in a solvent to the heavy-weight or light-releasing film and drying the solution. The thickness of the pressure-sensitive adhesive layer is not particularly limited, but is generally 5 占 퐉 or more.

The above heavy-weight film is, for example, a film which becomes a release film (or protective film) when a pressure-sensitive adhesive layer is bonded to a polarizing film, that is, in a polarizing plate produced by bonding a pressure-sensitive adhesive layer to a polarizing film. The heavy-duty recycled film is composed of a transparent resin film, for example, a polyester resin film such as polyethylene terephthalate, polyethylene naphthalate, or polybutylene terephthalate.

The light-releasing film is made of a transparent resin film having a surface subjected to a known releasing treatment. Therefore, the light-releasing film can be peeled off from the pressure-sensitive adhesive layer with a peeling force smaller than that of the heavy-weight re-film, and the surface of the light-releasing film on which the releasing treatment has been performed is bonded to the pressure- The light-releasing film is composed of a transparent resin film, for example, a polyester resin film such as polyethylene terephthalate, polyethylene naphthalate or polybutylene terephthalate.

The above-mentioned film laminate is usually produced by preparing a wide width film laminate original, and then cutting the original laminate film to a predetermined width. Therefore, the cross section in the width direction of the film laminate usually becomes a cut surface. The width of the film laminate is not particularly limited, but is generally 200 mm or more. The film laminate having a long length is wound such that the peeling strength of the heavy-weight film and the light-releasing film is generally different from that of the heavy-weight film.

An example of the configuration of the peeling apparatus according to the present invention will be described. 1, the peeling apparatus 20 according to the present embodiment conveys a film laminate 30 having a long length and a light-releasing film 31 from the film laminate 30 to a continuous As shown in Fig. The peeling apparatus 20 includes a first nip 1, a second nip 2 and a third nip 3, a peeling roller 4, and a guide roller 5, which are each formed of a pair of nip rollers , 6 · 7) and a conveying roller 8 · 9. Each of these rollers is fixed to a case (not shown) of the peeling apparatus 20.

The first nip portion 1 has a function of continuously discharging a long film laminate 30 wound from a winding portion (not shown) toward the peeling roller 4 side. The pair of nip rollers forming the first nip portion 1 are formed so that their axial centers (central axis) are parallel to each other and are made of a soft material such as rubber. As the nip roller, specifically, a known nip roller may be mentioned. At least one nip roller of the pair of nip rollers is a drive roller. Since the rotational speed of the nip roller is arbitrarily adjustable and the roller is vertically movable, the pressure of the first nip portion (1) Nip pressure) can be appropriately adjusted.

The second nip portion 2 has a function of continuously conveying the light-scattering film 31, which is peeled from the film laminate 30, to the winding portion (not shown). The pair of nip rollers forming the second nip portion 2 are formed so that their axial centers (central axes) are parallel to each other and made of a soft material such as rubber. As the nip roller, specifically, a known nip roller may be mentioned. At least one nip roller of the pair of nip rollers is a driving roller. The rotational speed of the nip roller is arbitrarily adjusted. The nip roller is vertically movable. The pressure of the second nip portion (2) Nip pressure) can be appropriately adjusted.

The third nip portion 3 is formed in the following step (for example, a step of peeling the light-releasing film 31 from the polarizing film) (Not shown, for example, a joining device) that performs a joining process (joining process). The pair of nip rollers forming the third nip portion 3 are provided so that their axial centers (central axes) are parallel to each other, and are made of a soft material such as rubber or the like, Is formed of a hard (substantially not adherent) material or a material whose surface is subjected to a known release treatment. At least one nip roller of the pair of nip rollers is a driving roller. The rotation speed of the nip roller is arbitrarily adjusted. The rotation speed of the nip roller is adjusted so that the pressure of the third nip portion (3) Nip pressure) can be appropriately adjusted.

The intermediate thick film 32 in the film laminate 30 is then taken out from the first nip portion 1 and then peeled off from the peeling roller 4 and the guide roller 7 and the conveying roller 9 to the third nip portion 3. [ On the other hand, the light-releasing film 31 in the film laminate 30 is peeled off from the first nip portion 1 and then peeled off from the peeling roller 4, the guide roller 5 · 6 and the conveying roller 8, To the second nip portion 2 via the second nip portion. In addition, control (tension control) is performed so that the tension of the heavy film 32 being conveyed is always constant between the first nip portion 1 and the third nip portion 3, (Tension control) so that the tension of the light peeling film 31 conveyed is always constant between the second nip portion 2.

The peeling roller 4 is disposed on the downstream side of the first nip 1 (on the downstream side in the transport direction of the film laminate 30) so as to come into contact with the side of the heavy- And has a function of continuously peeling off the light-releasing film 31 from the film laminate 30. [ The peeling roller 4 is a non-driven conveying roller made of a soft material such as rubber or a hard material such as a metal. Specific examples of the peeling roller 4 include known (general) rollers. The peeling roller 4 is adapted to change the conveying direction of the heavy film 32 with respect to the conveying direction of the light-releasing film 31. That is to say, the heavy film 32 in the film laminate 30 in contact with the peeling roller 4 is wound in the peeling roller 4 (along the peeling roller 4) While the delamination film 31 is conveyed without being wound on the peeling roller 4 (without changing the conveying direction). Thus, the peeling roller 4 is configured to continuously separate the film laminate 30 from the intermediate thick film 32 (laminate of the middle thick film and the pressure sensitive adhesive layer) and the light peeling film 31.

The guide rollers 5, 6, and 7 are non-drive rollers and made of a soft material such as rubber or a hard material such as metal. Specific examples of the guide rollers 5, 6, and 7 include known (general) rollers. The guide rollers 5 and 6 are adapted to change the conveying direction of the light-releasing film 31 and the guide rollers 7 are adapted to change the conveying direction of the heavy- have.

The guide roller 5 is disposed on the downstream side of the peeling roller 4 (the downstream side in the conveying direction of the light-releasing film 31) so as to come into contact with the side of the light- Respectively. The guide roller 6 is disposed on the downstream side of the guide roller 5 so as to come into contact with the side of the light-releasing film 31 that was not bonded to the pressure-sensitive adhesive layer.

The guide roller 7 is provided on the downstream side of the peeling roller 4 (downstream side in the conveying direction of the heavy-weight film 32) so as to come into contact with the side of the heavy- Respectively.

The guide roller 5 · 7 is provided on the guide roller 5 · 7 in such a manner that the angle θ in the conveying direction of the heavy loose film 32 with respect to the conveying direction of the light- 180 DEG or less, more preferably 60 DEG or more and 120 DEG or less. Thereby, the light-releasing film 31 can be continuously and more reliably peeled off from the film laminate 30 so that no adhesive layer remains on the light-releasing film 31 side.

The conveying roller 8 · 9 is a non-driving roller, and is made of a soft material such as rubber or a hard material such as a metal. As the conveying roller 8 · 9, specifically known (general) rollers can be mentioned. The conveying roller 8 is disposed on the downstream side of the guide roller 6 so as to come into contact with the side of the light-releasing film 31 that was not bonded to the pressure-sensitive adhesive layer. The conveying roller 9 is disposed on the downstream side of the guide roller 7 so that the conveying roller 9 comes into contact with the side of the heavy-relieved film 32 on which the pressure-sensitive adhesive layer is not bonded.

The conveying roller 8 is provided with a measuring section 10a for measuring the tension of the delamination film 31. The conveying roller 9 is provided with a measuring section 10a for measuring the tension of the heavy- And a portion 10b. Therefore, the conveying roller 8 · 9 is a so-called tension pickup roller. As the measuring units 10a and 10b, a known (general) tension measuring apparatus can be specifically used. The measurement data measured by the measurement units 10a and 10b are outputted to a control unit described later.

The second nip portion 2 is disposed on the downstream side of the conveying roller 8 (on the downstream side in the conveying direction of the light-releasing film 31) and the downstream side of the conveying roller 9 (The downstream side in the conveying direction) of the third nip portion 3 is disposed.

The peeling apparatus 20 analyzes the measurement data input from the measuring units 10a and 10b and analyzes the first nip 1, the second nip 2 and the third nip 3 (Not shown) that controls (adjusts) various conditions such as the rotational speed of each of the nip rollers to be formed and the pressure (nip pressure). In addition, what control the control unit performs in accordance with the analysis result is input (instructed) in advance by a user such as an operator.

According to the peeling apparatus 20 configured as described above, the tension of the light peeling film 31 and the tensile force of the heavy-fastener film 32 are controlled (tension controlled) so as to be constant by the control unit, The tension of the light-releasing film 31 and the tension of the heavy-weight reeling film 32 are constant and do not fluctuate, so that wrinkles are hardly generated in the light-releasing film 31 and the heavy-weight reeling film 32, The peeling roller 4 is prevented from moving (the peeling position can be stabilized). Therefore, the light-releasing film 31 can be stably peeled off so that the pressure-sensitive adhesive layer is not left on the light-releasing film 31 side. Thereby, it is possible to provide a peeling apparatus capable of continuously and reliably peeling the light-peeling film 31 from the film laminate 30 so that the pressure-sensitive adhesive layer is not left on the light-peeling film 31 side.

Next, a peeling method for peeling the light-peeling film 31 from the long film laminate 30 by the peeling apparatus 20 having the above-described structure will be described. In this description, preparations such as mounting (sandwiching) the film laminate, the light-releasing film and the heavy-weight film to the respective nip portions are already finished.

First, by driving the nip rollers forming the first nip 1, the second nip 2 and the third nip 3, the film laminate 30, the light-releasing film 31, and the heavy- (32) are transported at constant tension (and speed), respectively. Specifically, by adjusting the rotational speed of the nip roller forming the first nip portion 1 and the second nip portion 2, that is, by adjusting the rotational speed of the nip roller forming the second nip portion 2 (Tension control) so that the tension of the light separation film 31 conveyed is always constant. By adjusting the rotational speed of the nip roller forming the first nip portion 1 and the third nip portion 3, that is, by adjusting the rotational speed of the nip roller forming the third nip portion 3 (Tension control) so that the tension of the heavy film 32 being conveyed is always constant.

It is preferable that the tension of the light release film 31 conveyed and the tension of the heavy film 32 are each controlled to be 50 N or more (tension control) and more preferably controlled to 100 N or more. It is particularly preferable that the tensile force of the medium heavy film 32 being conveyed is greater than or equal to the tensile force of the light releasing film 31. [ Thereby, the light-releasing film 31 can be continuously and more reliably peeled off from the film laminate 30 so that no adhesive layer remains on the light-releasing film 31 side. The conveying speed of the light-releasing film 31 conveyed and the conveying speed of the heavy-weight rewinding film 32 are not particularly limited, as they are appropriately set in accordance with the material, the property, the thickness, and the tensile strength of these films, m / min or more, and 30 m / min or less.

The film laminate 30 is continuously taken out from the first nip 1 and the release film 4 is continuously conveyed by the tension film 31 and the heavy- The light-releasing film 31 is continuously and stably peeled off from the film laminate 30. Thereafter, the light separating film 31 having a long length passes through the second nip 2 through the guide rollers 5 and 6 and the conveying roller 8, and is wound around a winding portion (not shown). On the other hand, the long meandering film 32 passes through the third nip 3 through the guide roller 7 and the conveying roller 9 and is conveyed to the next step (for example, a step of joining with the polarizing film) (Not shown in the drawings, for example, a joining apparatus).

According to the peeling method described above, the tension of the light peeling film 31 and the tension of the heavy peeling film 32 are controlled to be constant (tension control), that is, the tensile force of the light peeling film 31 The peeling film 31 and the heavy loose film 32 are less prone to wrinkle and the peeling position is moved away from the peeling roller 4 because the tensile strength of the peeling film 32 and the middle peeling film 32 are constant and unchanged, There is no fear (the peeling position can be stabilized). Therefore, the light-releasing film 31 can be stably peeled off so that the pressure-sensitive adhesive layer is not left on the light-releasing film 31 side. Thereby, it is possible to provide a peeling method by which the delamination film 31 can be continuously and reliably peeled from the film laminate 30 so that the pressure-sensitive adhesive layer is not left on the delamination film 31 side.

The heavy-duty rewritable film 32 having a long length, which is obtained by peeling the heavy-weight rewinding film 32, that is, the light-releasing film 31 from the pressure-sensitive adhesive layer, is preferably used for producing an optical film such as a polarizing plate or various optical members Lt; / RTI >

The peeling roller 4 in the peeling apparatus 20 according to the present embodiment is constituted by a pair of rollers and one of the rollers is contacted with the side of the heavy- And the other roller is arranged so as to come into contact with the side of the light-releasing film 31 in the film laminate 30 so that the direction of conveyance of the light-releasing film 31 is changed along with the conveying direction of the heavy- It can be peeled off. That is, the direction of conveyance of the heavy-duty reel film 32 is changed, and the light-releasing film 31 is wound around the peeling roller (following the peeling roller) to change its conveying direction The film laminate 30 may be continuously separated from the heavy-weighted film 32 (laminated body of the heavy-weight film and the pressure-sensitive adhesive layer) and the light-releasing film 31. [ Even in the case of the above configuration, the delamination film 31 can be continuously and reliably peeled from the film laminate 30 so that no adhesive layer remains on the delamination film 31 side.

The peeling apparatus 20 according to the present embodiment is preferably used as a part of a manufacturing apparatus employing the so-called Roll-to-Panel system in which a liquid crystal display is manufactured by continuously joining a polarizing plate to a sheet- .

Here, as a use example of a long middle-length pay-off film (laminated body of a heavy-weight film and a pressure-sensitive adhesive layer), a manufacturing method of a polarizing plate (polarizing film original) using a heavy-weight reel film and a manufacturing method of a liquid- , Together with the production apparatus, will be described below.

The polarizing plate is composed of a polarizing film, a protective film (that is, a heavy film) and a pressure-sensitive adhesive layer. As the polarizing film, a known polarizing film can be mentioned. More specifically, as the polarizing film, there can be enumerated a known polarizing film in which a protective film is bonded to both sides of the polarizing film, and a pressure-sensitive adhesive layer is formed on the protective film. One of the pressure-sensitive adhesive layers of the pressure-sensitive adhesive layer is bonded to the polarizing film with a release film (that is, a heavy-weight film having properties different from those of the protective film) For example. Among the pressure-sensitive adhesive layers, the other pressure-sensitive adhesive layer is formed for bonding a protective film to the polarizing film. The thickness of the protective film is not particularly limited, but is generally 10 占 퐉 or more and 100 占 퐉 or less. The thickness of the pressure-sensitive adhesive layer may be suitably set. The thickness of the release film is not particularly limited, but is generally 10 占 퐉 or more and 100 占 퐉 or less.

As the polarizer film, for example, monoaxially stretched and a dye such as iodine may be added to a film made of polyvinyl alcohol, partially formalized polyvinyl alcohol, partially saponified ethylene-vinyl acetate copolymer, hydrophilic polymer such as cellulose, , And a film subjected to various treatments such as color adjustment.

Examples of the protective film include cellulose acetate resin films such as TAC (triacetylcellulose) film, cycloolefin resin film and diacetylcellulose, polyester resin films such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate , A polycarbonate resin film, an acrylic resin film, and a polypropylene resin film.

The thickness of the polarizing film is not particularly limited, but is generally 10 占 퐉 or more and 300 占 퐉 or less. The polarizing film may have another layer in addition to the three layers (protective layer, polarizer film and protective layer) in the practical range. Specifically, for example, the polarizing film may further include an adhesive layer (may be a pressure-sensitive adhesive layer) for bonding the polarizing film and the protective film.

The polarizing plate manufacturing apparatus is constructed such that the above-mentioned heavy-weight film made of a peeling film or protective film having a long length is adhered to both sides or one side of the polarizer film having a long length through a pressure-sensitive adhesive layer. Specifically, the polarizing plate producing apparatus comprises a conveying roller for conveying the polarizing film at a constant speed, and a pair of two or more conveying rollers for conveying one kind of heavy-weight film or two kinds of heavy-weight films having different properties at a constant speed And a joining device having a nip portion for joining the polarizer film and the heavy film. Then, the polarizing plate producing apparatus conveys the intermediate thick film to the nip portion of the joining apparatus while aligning the middle thin film with respect to the polarizer film, and attaches the heavy thin film to the polarizer film while applying a predetermined pressure (nip pressure) (Bonding operation).

The polarizing plate producing apparatus may be configured such that two kinds of heavy-weight films are simultaneously bonded to both sides of the polarizer film, and after joining the heavy-weight film to one side of the polarizer film, It may be possible to bond a heavy-weight film having properties different from those of the heavy-weight film. That is, the polarizing plate producing apparatus is configured so that the polarizing plate is manufactured by a single bonding operation in which the nip portion of the joining apparatus is nipped (nipped) in the order of the one heavy-weight film, the polarizing film and the other heavy- The bonding apparatus is provided with two nip portions, one of the nip portions is bonded (nipped) with one of the heavy-weight film and the polarizer film, and the other nip portion is bonded to the corresponding polarizer film and the other heavy- And the polarizing plate may be manufactured by the double bonding operation of fitting (nipping). As a result, a long polarizing plate (long polarizing plate bonded to a long release film) is produced.

When the polarizing plate is bonded to the liquid crystal panel, one of the two heavy-weight films bonded to the polarizer film becomes the protective film and the other heavy-weight film becomes the release film. Since the polarizing plate having a long length differs in the peeling force of the two types of heavy-weight films, the polarizing film is usually a long polar-length film wound with the heavy-weight film side serving as a protective film inward.

Therefore, the original polarizing film is a polarizing film laminate having a long polarizing film composed of a polarizing film, a pressure-sensitive adhesive layer, a protective film, and a releasing film. On the side of the polarizing film bonded to the liquid crystal panel, , And a protective film is bonded to the back surface of the surface through an adhesive layer (which may be a pressure-sensitive adhesive layer). That is, the polarizing plate is formed by laminating the pressure-sensitive adhesive layer, the polarizing film, the pressure-sensitive adhesive layer and the protective film in this order on the release film, and the polarizing film original is composed of the polarizing plate and the release film. The release film (also referred to as a protect film or separator) protects the surface of the polarizer (the side bonded to the liquid crystal panel) from damage until the polarizer is bonded to the liquid crystal panel, And is peeled from the polarizing plate when bonded to the panel.

The polarizing plate cut to a predetermined length from the original of the polarizing film is placed on both surfaces of the liquid crystal panel so as to cover the entire surface of the display area of the liquid crystal panel .

As the liquid crystal panel, a known liquid crystal panel can be mentioned. More specifically, the liquid crystal panel includes a known liquid crystal panel comprising a substrate such as a pair of glass substrates and a liquid crystal layer, and an alignment film disposed between the substrate and the liquid crystal layer.

The polarizing film master is wound by a polarizing film transport mechanism (not shown), and the polarizing plate peeled off from the peeling film is supplied to the nip portion of the bonding apparatus. The polarizing film transport mechanism will be described below.

The polarizing film transport mechanism includes a winding section, a winding section, a half cutter, a knife edge, and a roller group. A polarizing film original having a long length is provided on the winding portion, and the original polarizing film is wound. The polarizing film master is wound on a winding portion so that the direction of the absorption axis of the polarizing film is positioned in the carrying direction. The winding portion is adapted to wind a long peeling film. The roller group is provided so as to apply a predetermined tension to the original polarizing film to carry the original polarizing film. Therefore, the polarizing film transport mechanism is configured to take up a lengthy polarized film original wound in the form of a roll, convey it to the joining apparatus, and take up a long unnecessary peeling film.

The half cutter is provided on the upstream side (the withdrawal portion side) with respect to the edge of the knife, and cuts the polarizing film original, the polarizing film, the protective film and the pressure-sensitive adhesive layer. That is, the half cutter cuts the polarizing plate having a long length to a predetermined length without cutting the peeling film. As the half cutter, a known cutter such as a blade or a laser cutter is preferably used.

The edge of the knife edge is configured to peel off the release film from the polarizing plate cut to a predetermined length by its tip. The pressure-sensitive adhesive layer formed between the polarizing plate and the peeling film remains on the side of the polarizing plate after the peeling film is peeled off.

A description will be given of a joining step of joining the polarizing plate to the liquid crystal panel while peeling it from the long peeling film using the joining apparatus (and polarizing film conveying mechanism).

First, the liquid crystal panel is transported at a constant speed by driving a plurality of transport rollers. The upper pressurizing roller (and lower pressurizing roller) of the joining apparatus is rotationally driven at a constant rotational speed. This carrying operation is carried out throughout the bonding process.

Next, by rotating and driving the take-up unit and the take-up unit in the polarizing film transport mechanism at a predetermined rotation speed, the polarizing film original is transported at the same transport speed as the transport speed of the liquid crystal panel, The polarizing film is cut to a predetermined length. The peeling film having a long length is peeled off from the polarizing plate by the edge of the knife. At the same time as aligning the polarizing plate with respect to the liquid crystal panel, while aligning the polarizing plate with the liquid crystal panel, To the nip portion of the apparatus. Thereafter, a polarizing plate is bonded to the liquid crystal panel while applying a predetermined pressure (nip pressure) in the nip portion (bonding step).

That is, the polarizing plate cut to a predetermined length and peeled off from the release film by the tip end of the knife edge is conveyed while being aligned at the nip portion of the joining apparatus together with the liquid crystal panel, and bonded to the liquid crystal panel. That is, the polarizing plate conveyed to the nip is aligned (more specifically, aligned with the leading end in the conveying direction) to the liquid crystal panel so as to cover the entire display area of the liquid crystal panel (the front surface of the display screen) Panel.

Thereafter, the liquid crystal panel to which the polarizing plate is bonded is conveyed from the nip portion by a plurality of conveying rollers. Further, by performing the bonding step twice, a liquid crystal display device in which a polarizing plate is bonded to both surfaces of the liquid crystal panel is manufactured. The liquid crystal display device is modularized and then subjected to various assembling processes to be various products (final products) such as a notebook type personal computer, a mobile device such as a cellular phone, or a large-sized television.

[Embodiment 2]

Another embodiment of the present invention will be described below with reference to Fig. In the present embodiment, description of the same configuration as that described in the above embodiment is omitted.

2, the peeling apparatus 21 according to the present embodiment includes a variable peeling roller 14 in place of the peeling roller 4 in the peeling apparatus 20 according to the above embodiment, , And a variable guide roller (15) in place of the guide roller (5). The other members constituting the peeling apparatus 21 are the same as the members constituting the peeling apparatus 20.

The variable peeling roller 14 is disposed on the downstream side of the first nip portion 1 so as to come into contact with the side of the heavy film 32 in the film laminate 30, And has a function of peeling the film 31 continuously. The variable peeling roller 14 is a non-driven conveying roller made of a soft material such as rubber or a hard material such as a metal. As the variable peeling roller 14, specifically known (general) rollers can be mentioned. The variable peeling roller 14 is adapted to change the conveying direction of the heavy film 32 with respect to the conveying direction of the light releasing film 31. That is, the heavy film 32 in the film laminate 30 in contact with the variable peeling roller 14 is wound around the variable peeling roller 14 (along the variable peeling roller 14) (Direction of travel) is changed while the light-releasing film 31 is conveyed without being wound on the variable peeling roller 14 (without changing the conveying direction). This allows the variable peeling roller 14 to successively separate the film laminate 30 from the intermediate thick film 32 (laminate of the middle thick film and the pressure sensitive adhesive layer) and the light peeling film 31 .

The variable guide roller 15 is a non-driving roller, and is made of a soft material such as rubber or a hard material such as a metal. As the variable guide roller 15, a known (general) roller can be mentioned specifically. The variable guide roller 15 is disposed on the downstream side of the variable peeling roller 14 so as to come into contact with the side of the light-releasing film 31 that is not adhered to the pressure- As shown in Fig. The variable guide roller 15 is adapted to change the conveying direction of the light-releasing film 31.

In addition, the variable peeling roller 14 and the variable guide roller 15 are movably provided on a case (not shown) of the peeling apparatus 21. [ More specifically, the variable peeling roller 14 and the variable guide roller 15 are made of the material of the light-scattering film 31, the pressure-sensitive adhesive layer and the heavy-weight film 32 The angle? In the carrying direction of the heavy-duty film 32 with respect to the conveying direction of the light-releasing film 31 is set to, for example, (Position can be moved) such that it can be arbitrarily changed within a range of not less than 35 ° and not more than 180 °, more preferably not less than 60 ° and not more than 120 °. Therefore, the variable peeling roller 14 also has a function as a variable guide roller (also serving as a variable guide roller).

On the other hand, the guide roller 6 · 7 is fixed to a case (not shown) of the peeling apparatus 21 and has a function as a fixed guide roller. That is, the arrangement of the variable peeling roller 14 and the variable guide roller 15 is changed (the position is shifted) so that the slip film 31, which is directed from the variable guide roller 15 to the guide roller 6, The position of the guide roller 6 is fixed and the positional relationship between the guide roller 6 and the conveying roller 8 does not change. The conveying direction of the conveying belt 31 can be always kept constant. Likewise, the arrangement of the variable peeling roller 14 and the variable guide roller 15 is changed (the position is shifted) so that the conveyance of the heavy peelable film 32 from the variable peeling roller 14 toward the guide roller 7 The position of the guide roller 7 is fixed and the positional relationship with the conveying roller 9 does not change even if the direction of the conveying roller 9 is changed. It is possible to always keep the conveying direction of the conveying belt 32 constant.

That is, in the peeling apparatus 21 according to the present embodiment, the guide roller 6, which is a fixed guide roller, is provided between the variable guide roller 15 and the conveying roller 8, The conveying direction toward the conveying roller 8 is kept constant. That is, the contact angle (to be described later) of the light-releasing film 31 on the conveying roller 8 can be kept constant. Therefore, it is possible to stably measure the tension of the light-releasing film 31 by the measuring section 10a provided on the conveying roller 8. [ Similarly, in the peeling apparatus 21 according to the present embodiment, the guide roller 7, which is a fixed guide roller, is provided between the variable peeling roller 14 and the conveying roller 9, The conveying direction toward the conveying roller 9 is kept constant. That is, the contact angle of the heavy-lift film 32 on the conveying roller 9 can be kept constant. Therefore, it is possible to stably measure the tension of the heavy-fastener film 32 by the measuring section 10b provided on the conveying roller 9. [

Further, between the variable peeling roller 14 and the guide roller 7, a variable guide roller having the same structure as that of the variable guide roller 15 may be further provided. In this case, the variable peeling roller 14 does not have a function as a variable guide roller (or does not serve as a variable guide roller).

In the present invention, the "contact angle" is a measure indicating the extent to which the film (light-releasing film 31, heavy-weight film 32) is wound on the conveying roller 8 · 9, (A value obtained by subtracting 180 [deg.] From 180 [deg.] When the conveying direction is unchanged) by changing the conveying direction (conveying direction) by being conveyed while being in contact with the conveying direction. Concretely, for example, when the film is wound around the conveying roller 8 · 9 by 1/6, the conveying direction is changed by 60 °, so that the contact angle is 120 °. If the film is wound around the conveying roller 8 · 9, The contact angle is 90 DEG. Therefore, the contact angle is 90 DEG. When the contact angle is wound around 1/3, the contact angle is 60 DEG since the transfer direction is changed by 120 DEG. The contact angle is 0 DEG.

The positional relationship between the guide roller 6, the conveying roller 8 and the second nip 2 is always constant in the peeling apparatus 21 according to the present embodiment, ) Is always constant. Similarly, in the peeling apparatus 21 according to the present embodiment, the positional relationship between the guide roller 7, the conveying roller 9, and the third nip 3 is always constant, The contact angle of the contact portion 32 is always constant. The angle? In the conveying direction of the heavy-duty film 32 with respect to the conveying direction of the light-releasing film 31 is changed according to various conditions such as the material, property, and thickness of the film laminate 30 The tensile force of the light-releasing film 31 and the heavy-weight reeling film 32 can be stably measured. Therefore, it is possible to control the tension of the light-releasing film 31 and the heavy- have.

That is, even if the angle? In the conveying direction of the heavy-duty film 32 with respect to the conveying direction of the light-releasing film 31 is changed, the peeling device 21 having the above- The contact angle of the light-releasing film 31 and the heavy-weight film 32 in the conveying roller 8 · 9 can be made constant. That is, the tension of the light-releasing film 31 and the tension of the heavy-weight film 32 can be always kept constant by the measuring units 10a and 10b, so that the tension control by the control unit can be performed more stably . Therefore, according to the peeling apparatus 21 having the above-described configuration, it is possible to change the angle of the conveying direction of the heavy-fastener film 32 with respect to the conveying direction of the light- Therefore, it is possible to provide a peeling apparatus capable of continuously peeling the light-peeling film 31 from the film laminate 30 more stably.

The present invention is not limited to the above-described embodiments, but can be implemented in various forms within the scope of the description, and various modifications are possible within the scope of the claims.

[Industrial Availability]

According to the peeling method and peeling apparatus of the present invention, since the tension of the light peeling film and the tensile strength of the heavy peeling film are constant and do not fluctuate, the light peeling film can be stably . ≪ / RTI > Thereby, it is possible to provide a peeling method and a peeling apparatus which can stably and reliably peel off the light-peeling film from the film laminate so that the pressure-sensitive adhesive layer is not left on the light-peeling film side.

Therefore, the peeling method and peeling apparatus according to the present invention are preferably used, for example, in the production of a liquid crystal display device in which a polarizing plate is bonded to both surfaces of a liquid crystal panel. The liquid crystal display device is modularized and then subjected to various assembling processes to be widely used in various industries for manufacturing various products (final products) such as notebook type personal computers, mobile devices such as cellular phones, and large televisions .

1 First nip 2 Second nip
3 Third nip 4 Peeling roller
5 Guide rollers
6 Guide rollers (stationary guide rollers)
7 guide roller (stationary guide roller) 8 convey roller
9 conveying roller 10a measuring part
10b measuring unit
14 Variable separation roller (variable guide roller)
15 variable guide roller 20 peeling device
21 peeling device 30 film laminate
31 Light Release Film 32 Heavy Weight Film

Claims (10)

Wherein the adhesive layer comprises a pressure sensitive adhesive layer, a long peeling film having a long length and a light peeling film having a long length which can be peeled off from the pressure sensitive adhesive layer with a peeling force smaller than that of the heavy peeling film, The adhesive layer and the light-releasing film are stacked in this order, and the delamination film is continuously peeled off from the film laminate using a peeling roller, the peeling method comprising:
And the conveying direction of the lightly peelable film with respect to the conveying direction of the lightly peeling film is changed along the peeling roller while controlling the tension of the lightly peeling film being conveyed and the tension of the heavy relieving film to be constant. The method according to claim 1,
Wherein the direction of conveyance of the delamination film is further changed along the peeling roller. The method according to claim 1 or 2,
And the tensile force of the light peeling film and the tensile strength of the heavy peel film to be conveyed are each controlled to 50 N or more. The method according to claim 1 or 2,
Wherein a tension of the heavy film being fed is greater than or equal to a tensile force of the light-releasing film. The method according to claim 1 or 2,
Wherein the angle of the direction in which the heavy film is conveyed with respect to the conveying direction of the light separating film is not less than 35 degrees and not more than 180 degrees. The method according to claim 1 or 2,
Wherein the width direction section of the film laminate is a cut surface. The method according to claim 1 or 2,
Wherein the width of the film laminate is 200 mm or more. A pressure-sensitive adhesive layer, a heavy-weight continuous film having a long length, and a light-releasing film having a long length which can be peeled off from the pressure-sensitive adhesive layer with a peeling force smaller than that of the heavy- A peeling film is laminated in this order, and the peeling film is continuously peeled off from the film laminate,
A control unit for controlling the tension of the light separation film to be conveyed and the tension of the heavyweight film to be constant, And a measuring section for measuring the tension of the peeling film and the tension of the heavy film. The method of claim 8,
Further comprising a variable guide roller for arbitrarily changing the angle of the conveying direction of the heavyweight film with respect to the conveying direction of the light separation film. The method of claim 9,
Wherein the measuring section is provided on the conveying roller, and the contact angle of the light-separating film and the center-of-gravity film is adjusted so that the contact angle on the conveying roller is constant, Further comprising a fixed guide roller for adjusting the conveying direction of the film between the variable guide roller and the conveying roller.

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