JP2024025523A - Microstructure forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microstructure forming apparatus capable of continuously forming a microstructure with excellent patterning accuracy along a longitudinal direction of a base film.

SOLUTION: A microstructure forming apparatus 100 of the present invention includes: a microstructure forming part 50 that forms a microstructure on a base film 10; and a film transport part 20 that receives the base film 10 on which the microstructure is formed from the microstructure forming part 50 while supplying the base film 10 to the microstructure forming part 50. The microstructure forming part 50 has a first rotating roller 60 and a second rotating roller 70, and the microstructure is formed on a surface of the base film 10 by clamping of the base film 10 by the first rotating roller 60 and the second rotating roller 70 at a position 74 opposite the first rotating roller 60 and the second rotating roller 70. Thereafter, the base film 10 is cooled by cooling means 90 in a front area 73 of the second rotating roller 70 located in front of the opposing position 74 in a conveying direction.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a microstructure forming apparatus.

In recent years, a microstructure-forming film has been proposed in which microstructures are continuously formed along the longitudinal direction on the surface of a resin film having a flat surface.

A microstructure-forming film having such a configuration can be produced by, for example, heating the resin film by sandwiching the resin film between a heating roll and a nip roll, and at the time of sandwiching the resin film between the heating roll and the nip roll. The shape of the convex portion is transferred to the surface of the resin film. As a result, a fine structure along the longitudinal direction of the resin film is formed on the surface of the resin film which is in a molten state. Thereafter, the molten resin film on which the microstructure has been formed is brought into contact with a cooling roll to be cooled (see, for example, Patent Document 1).

In such a method for producing a microstructure-forming film, as described above, heating the resin film and forming a microstructure on the surface of the resin film are performed using the same roll (heating roll), and the microstructure is formed. Cooling of the resin film is carried out on different rolls (cooling rolls). Therefore, the problem is that it is not possible to form fine structures on the resin film with excellent patterning accuracy due to the necessity of transporting the resin film on which the fine structure has been formed from the heating roll to the cooling roll. was there.

Japanese Patent Application Publication No. 2012-210760

An object of the present invention is to provide a microstructure forming apparatus that can continuously form microstructures with excellent patterning accuracy along the longitudinal direction of a base film.

Such objects are achieved by the present invention described in (1) to (8) below.
(1) A microstructure forming device used to continuously form a microstructure along the longitudinal direction of a base film,
a microstructure forming part that continuously forms the microstructure on one surface of the base film along the longitudinal direction of the base film;
While continuously supplying the base film to the fine structure forming section along the conveying direction, in the fine structure forming section, the base film on which the fine structure is formed is continuously supplied along the conveying direction. and a film transport section that receives the film.
The film conveying section is located upstream of the fine structure forming section in the conveying direction, and is located further upstream than the first unwinding roller around which the base film is wound and the fine structure forming section in the conveying direction. a first winding roller located on the downstream side that winds up the base film on which the fine structure is formed, and the base film unwound from the first unwinding roller is attached to the fine structure forming section. The substrate film is continuously supplied to the base film, and the base film on which the fine structure is formed in the fine structure forming section is wound up by the first winding roller,
The fine structure forming part is located between the first unwinding roller and the first take-up roller in the conveyance direction, and comes into contact with the other surface of the base film midway in the longitudinal direction, a first rotating roller that rotates while being wound around; and a first rotating roller that is disposed opposite to the first rotating roller on the downstream side of the first rotating roller, and that the one surface of the base film is in contact with the middle of the longitudinal direction of the one surface; a second rotating roller that rotates while being wound around; a mold that is provided on the outer peripheral surface of the second rotating roller and has a convex portion corresponding to the shape of the fine structure; and the first rotation of the second rotating roller. a second heating means for heating a rear area including a facing position facing the roller and a rear position behind the facing position with respect to the rotational direction of the second rotating roller; and a front position ahead of the facing position. and a cooling means for cooling a front area including the first rotating roller, and at the position where the first rotating roller and the second rotating roller are arranged facing each other, a separation distance between the first rotating roller and the second rotating roller is The size of the base film is set such that it can be held between the first rotating roller and the second rotating roller, and the size of the base film is set to be such that it can be held between the first rotating roller and the second rotating roller, and the holding of the base film between the first rotating roller and the second rotating roller causes the base film to be held between the first rotating roller and the second rotating roller. The mold provided on a one-rotation roller is pressed against the one surface of the base film, thereby forming the fine structure on the one surface of the base film. A microstructure forming device characterized by:

(2) The second rotating roller includes a hollow part,
The microstructure forming apparatus according to (1) above, wherein the second heating means includes a heating unit disposed within the hollow portion and provided corresponding to the rear region.

(3) The microstructure formation according to (1) or (2) above, wherein the cooling means has a cold air supply section that is disposed outside the second rotating roller and blows cold air toward the front area. Device.

(4) The microstructure forming apparatus according to any one of (1) to (3), wherein the microstructure forming section further includes a first heating means for heating the first rotating roller.

(5) The fine structure forming section further includes a moving means that adjusts the distance between the first rotating roller and the second rotating roller at the facing position where the first rotating roller and the second rotating roller face each other. The microstructure forming device according to any one of (1) to (4) above, which is provided in a one-rotation roller.

(6) The film conveying section further includes a second unwinding roller located upstream of the fine structure forming section in the conveying direction, and around which a cushion film is wound, and a second unwinding roller located upstream of the fine structure forming section in the conveying direction. a second winding roller located upstream of the cushion film and winding the cushion film;
Prior to the cushion film unwound from the second unwinding roller being continuously supplied to the first rotating roller, the cushion film is overlapped on the other surface of the base film, After that, the first laminate in which the cushion film and the base film are stacked is sandwiched between the first rotating roller and the second rotating roller, and then the cushion is peeled off from the first laminate. The microstructure forming apparatus according to any one of (1) to (5) above, wherein the film is configured to be continuously wound by the second take-up roller.

(7) The film conveyance section further includes a third unwinding roller located downstream of the fine structure forming section in the conveyance direction, and around which a protective film is wound.
Before the base film on which the fine structure has been formed in the fine structure forming section is wound up by the first winding roller, the protective film is superimposed on the one surface of the base film. , any one of (1) to (6) above, wherein the second laminate in which the protective film and the base film are stacked is continuously wound up by the first winding roller. The microstructure forming device described in the above.

(8) The microstructure forming device according to any one of (1) to (7) above, wherein the base film is mainly composed of a thermoplastic resin.

According to the present invention, a fine structure can be continuously formed with excellent patterning accuracy along the longitudinal direction of the base film.

FIG. 1 is a side view of a first embodiment of a microstructure forming apparatus of the present invention. FIG. 2 is a diagram ((a): side sectional view, (b): front sectional view) showing a second rotating roller included in the microstructure forming apparatus shown in FIG. 1. FIG. FIG. 3 is a side view of a second embodiment of the microstructure forming apparatus of the present invention. FIG. 7 is a side view of a third embodiment of the microstructure forming apparatus of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The microstructure forming apparatus of the present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings.

<Fine structure forming device>
The microstructure forming apparatus 100 of the present invention is used to continuously form a microstructure along the longitudinal direction of a base film 10 to obtain a microstructure-forming film 13 on which the microstructure is formed. It is. Each embodiment of this microstructure forming apparatus 100 will be described in detail below.

<<First embodiment>>
FIG. 1 is a side view of a first embodiment of the microstructure forming apparatus of the present invention, and FIG. 2 is a diagram showing a second rotating roller included in the microstructure forming apparatus shown in FIG. 1 ((a): side sectional view, (b): Front sectional view). In the following, for convenience of explanation, the upper side in FIGS. 1 and 2 will be referred to as "upper" or "upper", and the lower side will be referred to as "lower" or "lower". The left side is called "left", the right side is called "right", the front side of the paper in FIG. 2(b) is called "left", and the back side of the paper is called "right". Further, in FIGS. 1 and 2(a), the direction from the left side to the right side is referred to as the conveyance direction, the left side is referred to as upstream, and the right side is referred to as downstream.

The microstructure forming device 100 includes a microstructure forming section 50 that continuously forms a microstructure on the surface (one side) of the base film 10 along the longitudinal direction of the base film 10, and While continuously supplying the base film 10 to the section 50 along the conveying direction, the base film 10 on which the fine structure has been formed in the fine structure forming section 50, that is, the fine structure forming film 13, is continuously supplied along the conveying direction. and a film transport section 20 for receiving the film.

As described above, the film conveyance unit 20 continuously supplies the base film 10 to the fine structure forming unit 50 along the conveyance direction, and transfers the base film 10 on which the fine structure has been formed in the fine structure forming unit 50. (Fine structure forming film 13) is continuously received along the transport direction.

As shown in FIG. 1, this film conveyance section 20 includes a first unwinding roller 21 around which a base film 10 is wound, a second unwinding roller 22 around which a cushion film 11 is wound, and a protective film 12. The third unwinding roller 23 wound with ) A first winding roller 25, a second winding roller 26 that winds up the cushion film 11, and a tensioner (tension roller) 31 disposed between the first winding roller 21 and the first winding roller 25. - 37, tensioners 41 to 45 arranged between the second take-up roller 22 and the second take-up roller 26, and tensioners arranged between the third take-up roller 23 and the first take-up roller 25. It has tensioners 46 and 47.

Note that each roller is made of a metal material such as stainless steel. Further, these rollers have rotational axes (center axes) facing the same direction, and are spaced apart from each other. Furthermore, each roller is rotatably supported, for example, by a frame (not shown) that supports the entire microstructure forming apparatus 100.

The first unwinding roller 21 has a cylindrical outer shape, is located on the upstream side (left side) in the conveying direction of the base film 10, and has a flat front surface (one surface) and a back surface (other surface). A base film 10 composed of a plane is wound into a roll, and the roller is used to send out the base film 10 downstream in the conveyance direction.

The second unwinding roller 22 has a cylindrical outer shape, is located upstream in the conveying direction of the base film 10 and above the first unwinding roller 21, and is arranged so that the cushion film 11 is in a roll shape. This roller is wound around the cushion film 11 and sends out the cushion film 11 downstream in the conveying direction.

The tensioners 31 to 33 and 41 to 43 each have a cylindrical outer shape. Moreover, among these, the tensioners 31 and 32 are rollers that are in contact with each other in the longitudinal direction of the base film 10 and rotate while being wound around the base film 10 . Thereby, while applying tension to the base film 10, the conveying direction can be changed and conveyed. Further, the tensioners 41 to 43 are rollers that are in contact with the cushion film 11 midway in the longitudinal direction and rotate while being wound around the cushion film 11. Thereby, the cushion film 11 can be conveyed while applying tension while changing the conveyance direction. Further, the tensioner 33 is stretched around the base film 10 in contact with both the midway in the longitudinal direction of the base film 10 and the midway in the longitudinal direction of the cushion film 11 so that the cushion film 11 is stacked on the tensioner 33 side. It is a rotating roller. As a result, the first laminate 15 formed by overlapping the base film 10 and the cushion film 11 is conveyed while applying tension to the base film 10 while changing the conveyance direction. This first laminate 15 (base film 10) can be supplied to a microstructure forming section 50, which will be described later.

In this first laminate 15, the back surface of the base film 10 is covered with the cushion film 11, so that when the base film 10 is supplied to the microstructure forming section 50, the surface of the base film 10 has a microstructure. It is exposed at the forming part 50. Further, the first laminate 15 is supplied to the microstructure forming section 50 with the cushion film 11 in contact with a first rotating roller 60 included in the microstructure forming section 50 .

Further, the second take-up roller 26 has a cylindrical outer shape, and the second take-up roller 26 is arranged between the second take-up roller 22 and the fine structure forming section 50, that is, on the upstream side of the fine structure forming section 50. This roller is located above the roller 22 and winds up the cushion film 11 after selectively peeling the cushion film 11 from the first laminate 15 sent out from the microstructure forming section 50. A motor (not shown) is connected to the second take-up roller 26, and the cushion film 11 is conveyed by the operation of this motor. Moreover, the conveyance speed of the cushion film 11 can be changed by changing the magnitude of the voltage applied to the motor.

The tensioners 44 and 45 each have a cylindrical outer shape, and are rollers that rotate while being wound around the cushion film 11 that is in contact with the cushion film 11 peeled off from the first laminate 15 in the longitudinal direction. Thereby, the cushion film 11 can be conveyed while applying tension while changing the conveyance direction.

Furthermore, the third unwinding roller 23 has a cylindrical outer shape, and the third unwinding roller 23 has a cylindrical outer shape, and the third unwinding roller 23 has a first The protective film 12 is wound into a roll at a position below the take-up roller 25, and is a roller that sends out the protective film 12 in the transport direction.

Further, the first take-up roller 25 has a cylindrical outer shape, is located at the most downstream side (right side) in the conveying direction of the base film 10, and is arranged to collect the fine structure sent out from the fine structure forming section 50. This is a roller that winds up the formed base film 10 (fine structure forming film 13) as a second laminate 16 on which the protective film 12 is superimposed. A motor (not shown) is connected to the first take-up roller 25, and the operation of this motor transports the second laminate 16, that is, the fine structure forming film 13. Further, by changing the magnitude of the voltage applied to the motor, the transport speed of the microstructure-forming film 13 can be changed.

The tensioners 34 to 36 and 46 to 47 each have a cylindrical outer shape. Moreover, among these, the tensioners 46 and 47 are rollers that are in contact with the protective film 12 midway in the longitudinal direction and are rotated while being wound around the protective film 12 . Thereby, the protective film 12 can be conveyed while applying tension while changing the conveyance direction. Furthermore, the tensioner 34 is configured such that both the midway in the longitudinal direction of the microstructure forming film 13 sent out from the microstructure forming unit 50 and the midway in the longitudinal direction of the protective film 12 are laminated with the protective film 12 on the tensioner 34 side. It is a roller that rotates while being in contact with each other. As a result, with the second laminate 16 formed by overlapping the microstructure-forming film 13 and the protective film 12, the conveyance direction is changed while applying tension to the microstructure-forming film 13. Can be transported. That is, before the fine structure forming film 13 is wound around the first winding roller 25, the fine structure forming film 13 is turned into the second laminate 16 with the protective film 12 superimposed thereon.

Further, the tensioners 35 and 36 are rollers that rotate while being wound around the second laminate 16, in which the fine structure forming film 13 and the protective film 12 are superimposed, in contact with each other midway in the longitudinal direction. As a result, the second laminate 16 (microstructure-forming film 13) is transported while applying tension to the microstructure-forming film 13 in the second laminate 16 while changing the transport direction. It can be continuously wound up by the winding roller 25.

In this second laminate 16, the surface of the microstructure-forming film 13, that is, the surface on which the microstructure is formed, is covered with the protective film 12, so that when the film is wound up by the first winding roller 25, In addition, the surface on which the fine structure is formed can be protected with the protective film 12.

Note that a motor may be connected to at least one of the unwinding rollers 21 to 23. As a result, by changing the magnitude of the voltage applied when the motor is activated, the transport speed of each film 10 to 12 can be changed, and the magnitude of the tension applied to each film 10 to 12 can be adjusted. .

Furthermore, a motor may be connected to at least one of the tensioners 32, 35, 42, 44, and 47. Thereby, by changing the magnitude of the voltage applied during operation of the motor, the magnitude of the tension applied to each of the films 10 to 12 and the second laminate 16 can be adjusted.

Furthermore, at least one of the tensioners 31, 32, 35, 36, 41-47 may be omitted depending on the position where the unwinding rollers 21-23 and the take-up rollers 25, 26 are arranged. Good too.

The fine structure forming unit 50 is located between the first unwinding roller 21 and the first take-up roller 25 in the transport direction, and converts the base film 10 from the film transport unit 20 into the first laminate 15. After the substrate film 10 is received from the upstream side in a state of (Fine structure forming film 13) is sent out to the downstream side of the film transport section 20.

As shown in FIGS. 1 and 2, this fine structure forming part 50 is in contact with the first laminate 15 (base film 10) midway in the longitudinal direction on the back surface side, and is rotated while being wrapped around the first laminate 15 (substrate film 10). The rotating roller 60 is disposed opposite to the first rotating roller 60 on the downstream side of the first rotating roller 60, and the surface of the first laminate 15 (base film 10) is in contact with the middle of the surface in the longitudinal direction, and is wrapped around it. a second rotating roller 70 that rotates while rotating; a mold 89 that is provided on the outer peripheral surface of the second rotating roller 70 and has a convex portion corresponding to the shape of the fine structure; and a first rotating roller 60 of the second rotating roller 70; A second heating means 80 that heats the rear region 72 including an opposing position 74 and a rear position behind the facing position 74 with respect to the rotational direction of the second rotating roller 70; a cooling means 90 that cools the front area 73 including the position; an air cylinder 65 that adjusts the distance between the first rotating roller 60 and the second rotating roller 70 at the opposing position 74; A release angle adjustment roller 95 is disposed opposite to the two-rotation roller 70, contacts the back surface of the base film 10 (microstructure-forming film 13) in the longitudinal direction, and rotates while being passed around. It has

Note that each roller included in the microstructure forming section 50 is made of a metal material such as stainless steel. Further, these rollers have rotational axes (center axes) facing the same direction, and are spaced apart from each other. Furthermore, each roller is rotatably supported, for example, by a frame (not shown) that supports the entire microstructure forming apparatus 100.

The first rotating roller 60 is located between the first unwinding roller 21 and the first take-up roller 25, more specifically between the tensioner 33 and the tensioner 44, on the upstream side of the second rotating roller 70 in the conveyance direction. It is a roller that rotates while being placed in contact with the back surface side of the base film 10, which is arranged to form the first laminate 15, in the longitudinal direction.

The first rotating roller 60 is equipped with a first heating means (not shown) for heating the first rotating roller 60, and the operation of the first heating means causes the first rotating roller 60 to It can function as a heating roller that heats the base film 10. Thereby, the base film 10 molten by the heating by the first rotating roller 60 can be supplied to the second rotating roller 70 located downstream of the first rotating roller 60 . Further, the first rotating roller 60 and the second rotating roller 70 have a structure in which they can be perfectly synchronized electrically and mechanically so that there is no deviation in the phase angle of rotation. In addition, when setting it as the structure which takes electrical tuning, it is preferable that a motor is connected to at least one of the rotating rollers 60 and 70.

The first rotating roller 60 has a cylindrical outer shape. Thereby, the base film 10 wrapped around the first rotating roller 60 can be uniformly heated from the back side thereof.

The air cylinder 65 is located on the opposite side (lower side) of the second rotating roller 70 with respect to the first rotating roller 60, and rotatably supports the first rotating roller 60. A moving means for moving the first rotating roller 60 so as to adjust the distance between the first rotating roller 60 and the second rotating roller 70 at a facing position 74 where the two rotating rollers 70 and the first rotating roller 60 face each other. It consists of Thereby, by operating the air cylinder 65, it becomes possible to move the first rotating roller 60 with respect to the second rotating roller 70. Therefore, the distance between the first rotating roller 60 and the second rotating roller 70 can be set to a desired size.

Therefore, this separation distance should be set to a size that allows the first rotating roller 60 and the second rotating roller 70 to sandwich the first stacked body 15 located between these rotating rollers 60 and 70. Thus, the first laminate 15 can be compressed by the rotating rollers 60 and 70. Therefore, the shape of the convex portion of the mold 89 provided on the outer peripheral surface of the second rotating roller 70 can be transferred to the surface of the base film 10. That is, by compressing the first laminate 15, the first rotating roller 60 functions as a compression roller (nip roll) that causes the surface of the base film 10 to follow the shape of the convex portion of the mold 89. be able to.

The second rotating roller 70 is located between the first unwinding roller 21 and the first take-up roller 25, more specifically between the tensioner 33 and the tensioner 34, on the downstream side of the first rotating roller 60 in the conveyance direction. The surface of the first laminate 15 (base film 10), which is disposed opposite to the first rotating roller 60 and is supplied (conveyed) from the first rotating roller 60, comes into contact with the middle in the longitudinal direction, and is being rolled around. It is a rotating roller.

The second rotating roller 70 is provided with a second heating means 80 for heating the second rotating roller 70 inside thereof.

This second heating means 80 is located in the hollow portion 71 of the second rotating roller 70 at an opposing position 74 that faces the first rotating roller 60 of the second rotating roller 70 , and at a position where the second rotating roller 70 rotates more than the opposing position 74 . It is provided corresponding to a rear region 72 including a rear position at the rear with respect to the direction, and is configured to selectively heat the outer peripheral portion of the second rotating roller 70 located in this rear region 72. As a result, the second rotating roller 70 can function as a heating roller for heating the base film 10 in the rear region 72 by operating the second heating means 80 . Therefore, by heating in the rear region 72 by the second rotating roller 70, the molten base film 10 supplied from the first rotating roller 60 can be maintained in a molten state more reliably.

The second rotating roller 70 has a hollow portion 71 inside thereof, and has a cylindrical outer shape. Since the overall shape is cylindrical in this way, the base film 10 wrapped around the second rotating roller 70 can be uniformly heated from the surface side thereof.

The second heating means 80 is arranged in the hollow part 71 and includes a heating unit provided corresponding to the rear region 72, and includes heating wires and electromagnetic induction provided corresponding to the shape of the rear region 72. By having a heating block composed of a heating coil, a heat transfer bag containing liquid or gas, etc., the rear region 72 can be selectively heated.

The second rotating roller 70 having such a configuration is provided with a mold 89 having a convex portion continuously formed along the rotational direction of the second rotating roller 70 on its outer peripheral surface. In this mold 89, the convex portion has a shape that is symmetrical in the thickness direction of the base film 10 with respect to the shape of the fine structure to be formed on the base film 10. Therefore, the mold 89 is provided on the second rotating roller 70 as an endless belt having convex portions for forming a fine structure on the base film 10. Further, as described above, at the opposing position 74 where the first rotating roller 60 and the second rotating roller 70 face each other, the distance between them is such that the first rotating roller 60 and the second rotating roller 70 are The size is set to such an extent that the body 15 can be held and compressed. Therefore, by sending out (supplying) the base film 10 that has been molten in the first laminate 15 to the opposing position 74 through the rotation of the first rotating roller 60 and the second rotating roller 70, the mold 89 is rotated. The shape of the convex portion can be transferred to the surface of the base film 10 as a concave portion corresponding to the shape. That is, at the opposing position 74, a fine structure composed of recesses corresponding to the shape of the projections of the mold 89 can be formed on the surface of the base film 10.

As described above, the convex portions of the mold 89 are symmetrical in the thickness direction of the base film 10 with respect to the shape of the microstructure, and can have any shape corresponding to the shape of the microstructure to be formed. Specifically, it may be linear, meandering, or island-shaped along the outer circumferential direction of the second rotating roller 70. Further, one linear, meandering, or island-shaped convex portion may be provided along the outer circumferential direction of the second rotating roller 70, and one convex portion having such a configuration may be A plurality of rollers may be provided side by side along the width direction of the second rotating roller 70. Further, such convex portions may have substantially the same thickness or may have different thicknesses at arbitrary positions along the outer circumferential direction of the second rotating roller 70.

The mold 89 may be fixed to the outer periphery of the second rotary roller 70, or, for example, the mold 89 may be a thin sleeve and the second rotary roller 70 may be a jacket roll, and air can be supplied to the jacket roll. As in the case where the mold 89 can be selectively attached to and detached from the second rotating roller 70 by supplying or non-supplying, the mold 89 may be detachably provided.

Furthermore, a cooling means 90 for cooling the second rotating roller 70 is provided outside the second rotating roller 70 . This cooling means 90 is provided corresponding to a front region 73 including a front position in front of the opposing position 74, and is configured to selectively cool the outer peripheral portion of the second rotating roller 70 located in this front region 73. It is configured. As a result, at the facing position 74 where the first rotating roller 60 and the second rotating roller 70 face each other, the base film 10 to which the shape of the convex portion of the mold 89 has been transferred, that is, the base material in a molten state. The base film 10 (microstructure-forming film 13) having a microstructure formed on the surface of the film 10 can be cooled.

This cooling means 90 is arranged outside the second rotating roller 70 and has a cold air supply section 91 provided corresponding to the front region 73. This cold air supply section 91 is supported and fixed to the frame that supports the entire microstructure forming apparatus 100. The cold air supply unit 91 is configured such that the cold air generated by cooling the air in the cold air supply unit 91 is conveyed to the front area 73 by the second rotating roller 70 via a plurality of cold air supply holes (not shown). , is sprayed onto the fine structure forming film 13. Thereby, the base film 10 (microstructure-forming film 13) in a molten state can be cooled with the microstructure formed on its surface, and the base film 10 can be solidified.

The release angle adjusting roller 95 is disposed opposite to the second rotating roller 70 between the second rotating roller 70 and the tensioner 34, that is, on the downstream side of the second rotating roller 70 in the conveyance direction, and is arranged to face the second rotating roller 70. The microstructure-forming film 13 is cooled by the cooling means 90 in a state in which the fine structure-forming film 13 is cooled by the cooling means 90.

The release angle adjusting roller 95 is movable along the conveying direction between the second rotating roller 70 and the tensioner 34 by the operation of a moving means (not shown). Thereby, the contact angle (release angle) at which the midway of the microstructure-forming film 13 contacts the second rotating roller 70 can be set to a desired angle. Therefore, the separation of the microstructure-forming film 13 from the second rotating roller 70, that is, the separation of the microstructure-forming film 13 from the mold 89 can be performed smoothly.

Using the microstructure forming apparatus 100 as described above, it is possible to obtain a base film 10 (microstructure-forming film 13) in which a microstructure is continuously formed along the longitudinal direction of the base film 10.

Hereinafter, a method for continuously obtaining a microstructure-forming film 13 using the microstructure forming apparatus 100, that is, a method for forming a microstructure on the base film 10 will be sequentially explained.

(Method for forming a microstructure on a base film using a microstructure forming device)
In this embodiment, the method for forming a fine structure on a base film 10 using this fine structure forming apparatus 100 is to obtain a first laminate 15 in which a base film 10 and a cushion film 11 are superposed, and then In the first step of supplying the first laminate 15 to the microstructure forming unit 50 and in the microstructure forming unit 50, a microstructure is formed on the surface of the base film 10 included in the first laminate 15 to form a microstructure-formed film. After obtaining 13, the cushion film 11 is peeled from the first laminate 15 to obtain the microstructure-forming film 13 with the cushion film 11 peeled off, and the microstructure-forming film 13 is coated with a protective film. After obtaining the second laminate 16 in which 12 are superimposed, the second laminate 16 is wound up by the first winding roller 25.

Hereinafter, each step of the method for forming a microstructure on the base film 10 using the microstructure forming apparatus 100 will be sequentially explained.

(1st step)
First, a first laminate 15 in which the base film 10 and the cushion film 11 are stacked on each other is obtained, and then this first laminate 15 is supplied to the microstructure forming section 50 .

(1A-1) First, the first unwinding roller 21 around which the base film 10 is wound in advance, the second unwinding roller 22 around which the cushion film 11 is wound in advance, and the protective film 12 around which the protective film 12 is wound in advance. A third unwinding roller 23 is prepared.

Among these, the base film 10 wound around the first unwinding roller 21 is one that can transfer the convex portions of the mold 89 in a molten state by heating in the fine structure forming section 50, that is, a A material mainly composed of plastic resin is used.

Examples of thermoplastic resins include, but are not limited to, phenoxy resins, polyvinyl acetal resins, acrylic resins, linear olefin resins such as polyethylene, polystyrene, and polypropylene, and cycloolefins such as cycloolefin copolymers. resins, polycarbonates, polyimides, polyamideimides, polyethersulfones, polysulfones, etc., and one or more of these can be used in combination, but among them, cycloolefin copolymers are preferred. preferable. As a result, it is possible to obtain a microstructure in which the convex portions of the mold 89 are transferred with excellent precision in the base film 10 (microstructure-forming film 13), and to maintain the transferred microstructure for a long period of time. It can be strongly maintained.

Then, the base film 10 is moved from the first unwinding roller 21 along the unwinding direction to the tensioners 31 to 33, the first rotating roller 60, the second rotating roller 70, the release angle adjusting roller 95, and the tensioners 34 to 33. 37, and the tip thereof is attached to the first winding roller 25.

Further, the cushion film 11 is unwound from the second unwinding roller 22 along the unwinding direction so that the middle part thereof contacts the tensioners 41 to 43, 33, the first rotating roller 60, and the tensioners 44, 45, The leading end thereof is attached to the second take-up roller 26.

At this time, in the tensioner 33 and the first rotating roller 60, the cushion film 11 and the base material are stacked as the first laminate 15 in which the cushion film 11 and the base film 10 are stacked on each other, with the cushion film 11 on each roller side. The middle of the film 10 contacts the tensioner 33 and the first rotating roller 60.

Furthermore, the protective film 12 is unwound from the third unwinding roller 23 along the unwinding direction so that the middle part of the protective film 12 contacts the tensioners 46 to 47, 34 to 37, and the tip is placed on the first winding roller 23. Attach to.

At this time, in the tensioners 34 to 37, the protective film 12 and the base film 10 are stacked together as a second laminate 16 in which the protective film 12 and the base film 10 are stacked with the protective film 12 on the tensioner 34, 36 side. The middle part contacts the tensioners 34 to 37.

As described above, by attaching the tips of the respective films 10 to 12 wound around the respective unwinding rollers 21 to 23 to the respective winding rollers 25 and 26, preparations are made before operating the respective motors provided in the microstructure forming apparatus 100. is completed.

(1A-2) Next, each film 10 to 12 wound around each unwinding roller 21 to 23 is moved from each unwinding roller 21 to 23 to the winding roller 25, 26 side, that is, each of the films 10 to 12 is sent out to the downstream side along the conveyance direction.

As a result, among the films 10 to 12, the base film 10 and the cushion film 11 are wrapped around the tensioners 31 and 32 and the tensioners 41 to 43 and transported in the transport direction, and then the tensioner 33 transfers the cushion film 11 to the cushion film 11. The first laminate 15 is formed by stacking the film 11 on the tensioner 33 side. That is, before the base film 10 is supplied to the microstructure forming section 50, the base film 10 is made into the first laminate 15 with the cushion film 11 superimposed thereon. Thereafter, this first laminate 15 is supplied from the tensioner 33 to the microstructure forming section 50 in the formed state. More specifically, in the first laminate 15 in which the base film 10 and the cushion film 11 are superimposed, the fine structure forming part 50 is arranged along the conveying direction from the tensioner 33 with the cushion film 11 on the tensioner 33 side. The first rotating roller 60 has a first rotary roller 60 .

Through such steps (1A-1) and (1A-2), the first laminate 15 is transported and supplied to the microstructure forming section 50.

(Second process)
Next, in the microstructure forming section 50, after forming a microstructure on the surface of the base film 10 included in the first laminate 15 to obtain a microstructure forming film 13, the cushion film 11 is removed from the first laminate 15. By peeling, the microstructure-forming film 13 with the cushion film 11 peeled off is obtained.

(2A-1) First, the cushion film 11 is placed on the first rotating roller 60 side, and is passed around while being in contact with the first rotating roller 60.

Thereby, by rotating the first rotating roller 60, the first stacked body 15 can be supplied to the facing position 74 where the first rotating roller 60 and the second rotating roller 70 face each other.

At this time, the first laminate 15 (base film 10) supplied from the tensioner 33 side to the first rotating roller 60 has a straight line passing through the opposing position 74 and the center axis of the first rotating roller 60. The contact occurs between the point of intersection with the outer circumferential surface of the first rotating roller 60 and the opposing position 74 until the first rotating roller 60 is rotated 180 degrees. Further, the first rotating roller 60 includes a first heating means therein, and has a function as a heating roller that heats the first laminate 15 (base film 10). Therefore, by operating the first heating means, the first laminate 15 can be heated until the first rotating roller 60 is rotated 180 degrees, so that the base film 10 included in the first laminate 15 can be heated. can be reliably brought into a molten state.

Note that when the first stacked body 15 is supplied to the opposing position 74 where the first rotating roller 60 and the second rotating roller 70 face each other, the first rotating roller 60 at the opposing position 74 is supplied by the operation of the air cylinder 65. and the second rotating roller 70 is large enough to allow the first rotating roller 60 and the second rotating roller 70 to sandwich the first stacked body 15 located between these rotating rollers 60 and 70. This is preset.

(2A-2) Next, the first laminate 15, which has been supplied to the opposing position 74 along the conveyance direction by the rotation of the first rotating roller 60, is rotated between the first rotating roller 60 and the second rotating roller at this opposing position 74. It is held between rollers 70.

At this time, a mold 89 having a convex portion is provided on the outer peripheral surface of the second rotating roller 70. Since the first laminate 15 has the cushion film 11 on the first rotating roller 60 side, the surface of the base film 10 is on the second rotating roller 70 side, and the rotation of the first rotating roller 60 moves the facing position 74. Supplied up to. Further, by heating the first laminate 15 by the first rotating roller 60, the base film 10 in the first laminate 15 is melted and supplied to the opposing position 74.

Therefore, by sandwiching the first stacked body 15 between the first rotating roller 60 and the second rotating roller 70 at the facing position 74, the first stacked body 15 is compressed between the rotating rollers 60 and 70. Therefore, due to the convex portions of the mold 89 being pressed against the surface of the base film 10, the shape of the convex portions of the mold 89 is transferred to the surface of the base film 10 in a molten state. It will be done. That is, a microstructure-forming film 13 in which a microstructure is formed on the surface of the base film 10 in a molten state is obtained.

Further, at this time, the second rotating roller 70 has a second heating means 80 in the hollow portion 71 that selectively heats the outer peripheral portion of the second rotating roller 70 located in the rear region 72. Therefore, by heating the rear region 72 by the outer circumferential portion of the second rotating roller 70, the mold 89 provided at this outer circumferential portion can be heated. Therefore, at the facing position 74, the molten base film 10 supplied from the first rotating roller 60 can be more reliably maintained in the molten state. Therefore, a fine structure can be formed on the surface of the base film 10 with excellent precision.

(2A-3) Next, the cushion film 11 is peeled from the substrate film 10 (microstructure-forming film 13) on which a microstructure is formed, which is obtained at the opposing position 74, in front of the opposing position 74 in the transport direction. . That is, the cushion film 11 is peeled off from the first laminate 15 .

This peeling of the cushion film 11 from the first laminate 15 is carried out by wrapping the cushion film 11 around the tensioners 44 and 45 and conveying it in the conveying direction, and then continuously winding it up with the second winding roller 26. be done.

At this time, the base film 10 from which the cushion film 11 has been peeled is wound around the second rotating roller 70 and the tensioners 34 to 37 in the middle, and then wound around the first winding roller 25, so that the fine structure With the surface on which is formed facing the second rotating roller 70, that is, with the convex part of the mold 89 biting into the fine structure, it contacts the second rotating roller 70 and moves along the conveyance direction. transported.

(2A-4) Next, after the base film 10 (fine structure forming film 13) on which the fine structure is formed is conveyed by the second rotary roller 70 along the conveyance direction by the rotation of the second rotary roller 70, the fine structure is The structure forming film 13 is peeled off from the second rotating roller 70.

When the fine structure forming film 13 is transported by the second rotating roller 70, a cooling means 90 is formed corresponding to a front region 73 including a front position ahead of the opposing position 74. Therefore, by operating the cooling means 90, cold air is blown onto the microstructure-forming film 13 located in the front region 73, thereby cooling and solidifying the microstructure-forming film 13 with the microstructure formed on its surface. can be done.

Furthermore, when peeling off the microstructure forming film 13 from the second rotating roller 70, a release angle adjusting roller 95 is disposed opposite to the second rotating roller 70 on the downstream side of the second rotating roller 70 in the conveying direction. ing. At this time, the release angle adjusting roller 95 adjusts the angle between the microstructure forming film 13 and the second rotating roller 70 (peeling The second rotary roller 70 is disposed at a predetermined position (disposition position) where the angle) is within an appropriate range. Therefore, the separation of the microstructure-forming film 13 from the second rotating roller 70, that is, the separation of the microstructure-forming film 13 from the mold 89 can be performed smoothly.

Here, the base film 10 (microstructure-forming film 13) supplied from the first rotating roller 60 to the second rotating roller 70 in the vicinity of the opposing position 74 has an intermediate surface side that has been supplied from the opposing position 74 to the opposing position. 74 and the central axis of the second rotating roller 70, the second rotating roller 70 is rotated 180 degrees to the vicinity of the intersection of the straight line with the outer circumferential surface of the second rotating roller 70. On the other hand, as described above, the first laminate 15 (base film 10) supplied from the tensioner 33 side to the first rotating roller 60 has its middle back surface facing the opposing position 74 and the first rotating roller 60. The first rotating roller 60 comes into contact with the first rotating roller 60 from the point of intersection with the outer circumferential surface of the first rotating roller 60, which is a straight line passing through the center axis of the first rotating roller 60, to the opposing position 74 until the first rotating roller 60 is rotated 180 degrees. Therefore, in conveying the base film 10 from the first rotating roller 60 to the second rotating roller 70, the base film 10 is conveyed in an S-shape. In conveying the S-shaped base film 10, the base film 10 supplied in a molten state to the facing position 74 is transported to the facing position 74, where the base film 10 is fed to the facing position 74, where A fine structure is formed on the surface using the mold 89, and then solidified by cold air blown by the cooling means 90 in the front region 73 located in front of the opposing position 74 in the conveyance direction. As described above, in the present invention, from the formation of a microstructure on the base film 10 in a molten state to the solidification (cooling) of the base film 10 (microstructure-forming film 13) on which the microstructure has been formed, This is carried out on one roller (second rotating roller 70). Therefore, a fine structure can be formed on the base film 10 with excellent patterning accuracy.

Through these steps (2A-1) to (2A-4), it is possible to obtain the microstructure-forming film 13 in which the cushion film 11 is peeled off in the microstructure-forming section 50.

(3rd step)
Next, after obtaining a second laminate 16 in which the protective film 12 is superimposed on the fine structure forming film 13, this second laminate 16 is wound up by the first winding roller 25.

(3A-1) First, the base film 10 (microstructure-forming film 13) on which a microstructure is formed, obtained in the microstructure-forming unit 50, is transported along the transport direction to the tensioner 34, and the third volume After the protective film 12 sent out from the output roller 23 is passed around the tensioners 46 and 47 and conveyed in the conveyance direction, the second laminate 16 is formed by superposing the protective film 12 on the tensioner 34 side with the protective film 12 on the tensioner 34 side. .

At this time, the surface of the microstructure-formed film 13 on which the microstructure is formed faces the tensioner 34 side. Therefore, the surface of the fine structure forming film 13 can be covered with the protective film 12 by overlapping the fine structure forming film 13 and the protective film 12 in the tensioner 34 with the protective film 12 on the tensioner 34 side. Therefore, in the second laminate 16, the fine structure on the surface of the fine structure forming film 13 can be reliably protected by the protective film 12.

(3A-2) Next, the microstructure-forming film 13 is formed into the second laminate 16 with the protective film 12, and after being conveyed in the conveying direction by passing it around the tensioners 35 to 37, the first winding roller 25 Wind it up.

Through these steps (3A-1) and (3A-2), the base film 10 (microstructure-forming film 13) on which a microstructure is formed is converted into a second laminated layer protected by the protective film 12. The body 16 can be obtained in a state where it is wound up by the first winding roller 25.

By performing the first to third steps using the microstructure forming apparatus 100 as described above from the tip to the base of the base film 10 wound around the first unwinding roller 21, fine structures can be formed. A substrate film 10 (microstructure-forming film 13) having a structure formed thereon can be obtained in which the microstructure is continuously formed along the longitudinal direction of the surface with excellent patterning accuracy.

In the present embodiment, the first rotating roller 60 has been described as having the first heating means therein, but the outer peripheral portion of the second rotating roller 70 is heated by the second heating means 80 provided in the second rotating roller 70. Furthermore, when the base film 10 is melted by the heating of the mold 89 and the shape of the convex portion of the mold can be transferred to the surface thereof, the first rotating roller 60 is heated by the first heating means inside it. The formation may be omitted.

Furthermore, even if the mold release angle adjusting roller 95 is not arranged to face the second rotary roller 70, if the fine structure forming film 13 can be smoothly peeled off from the second rotary roller 70 (mold 89), , its arrangement can be omitted.

In addition to the configuration of the first embodiment as described above, the microstructure forming apparatus 100 can also be used with configurations of the second and third embodiments as shown below. A base film 10 can be obtained.

<Second embodiment>
FIG. 3 is a side view of a second embodiment of the microstructure forming apparatus of the present invention. In the following, for convenience of explanation, the upper side of FIG. 3 will be referred to as "upper" or "upper", the lower side will be referred to as "lower" or "lower", the left side will be referred to as "left", and the right side will be referred to as "right". . Further, in FIG. 3, the direction from the left side to the right side is called the conveyance direction, and the left side is called upstream, and the right side is called downstream.

The microstructure forming apparatus 100 of the second embodiment shown in FIG. 3 will be described below, focusing on the differences from the microstructure forming apparatus 100 of the first embodiment shown in FIG. , the explanation thereof will be omitted.

In the fine structure forming apparatus 100 shown in FIG. 3, the fine structure forming apparatus 100 shown in FIG. This is similar to the structure forming apparatus 100.

That is, in this embodiment, the formation of the first laminate 15 obtained by overlapping the cushion film 11 on the base film 10 is omitted. Therefore, from the tensioner 33 included in the film conveying unit 20 to the first rotating roller 60 included in the microstructure forming unit 50, a base material is used instead of the first laminate 15 in which the base film 10 and the cushion film 11 are superimposed. The material film 10 is supplied alone.

Therefore, in the fine structure forming section 50, this base film 10 is individually wrapped around the first rotating roller 60 and conveyed in the conveying direction to the opposing position 74, and then is conveyed to the opposing position 74. , is sandwiched between the first rotating roller 60 and the second rotating roller 70, thereby forming a fine structure on the surface of the base film 10.

By using the microstructure forming apparatus 100 configured as described above, the base film 10 (microstructure forming A film 13) can be obtained in which this fine structure is continuously formed along the longitudinal direction of its surface.

However, by making the microstructure forming apparatus 100 have the configuration described in the first embodiment, the base film 10 is held between the first rotating roller 60 and the second rotating roller 70 at the opposing position 74. When the cushion film 11 is stacked on top of each other to form a first laminate 15, the cushion film 11 functions as a cushion layer located below the base film 10. demonstrate. Therefore, by sandwiching the first laminate 15 between the first rotating roller 60 and the second rotating roller 70, when making the surface of the base film 10 follow the shape of the convex portion of the mold 89, this tracking is improved. It can be done with great precision. Therefore, a fine structure can be formed on the base film 10 with excellent patterning accuracy.

<Third embodiment>
FIG. 4 is a side view of a third embodiment of the microstructure forming apparatus of the present invention. In the following, for convenience of explanation, the upper side of FIG. 4 will be referred to as "upper" or "upper", the lower side will be referred to as "lower" or "lower", the left side will be referred to as "left", and the right side will be referred to as "right". . Further, in FIG. 4, the direction from the left side to the right side is referred to as the conveyance direction, the left side is referred to as upstream, and the right side is referred to as downstream.

The microstructure forming apparatus 100 of the third embodiment shown in FIG. 4 will be described below, focusing on the differences from the microstructure forming apparatus 100 of the first embodiment shown in FIG. , the explanation thereof will be omitted.

The fine structure forming apparatus 100 shown in FIG. 4 is the same as the fine structure forming apparatus 100 shown in FIG. be.

That is, in this embodiment, the formation of the second laminate 16 obtained by overlapping the protective film 12 on the base film 10 (microstructure-forming film 13) is omitted. Therefore, a tensioner 34 provided in the film conveying section 20 passes the base film 10 (fine structure forming film 13) and protective film 12 to the first winding roller 25 via tensioners 35 to 37. Instead of the two-layered product 16, the microstructure-forming film 13 is supplied alone.

Therefore, the fine structure forming film 13 is wound around the tensioners 35 to 37 alone and then wound around the first winding roller 25. Therefore, in this embodiment, the microstructure-forming film 13 is obtained in a state where it is wound up independently on the first winding roller 25.

By using the microstructure forming apparatus 100 configured as described above, the base film 10 (microstructure forming A film 13) can be obtained in which this fine structure is continuously formed along the longitudinal direction of its surface.

However, by making the fine structure forming apparatus 100 have the configuration described in the first embodiment, the base film 10 (fine structure forming film 13) can be moved between the protective film 12 and the are superimposed to form a second laminate 16. In this second laminate 16, the protective film 12 covers the fine structure formed on the surface of the fine structure forming film 13. Therefore, in the second laminate 16, the protective film 12 functions as a protective layer that protects the fine structure. Therefore, when storing or moving the microstructure forming film 13 wound around the first take-up roller 25, damage to the microstructure or deformation of the microstructure can be accurately suppressed or prevented. can do.

Although the microstructure forming apparatus of the present invention has been described above, the present invention is not limited thereto, and each part constituting the microstructure forming apparatus may have any configuration that can perform the same function. Can be replaced.

Further, in the present invention, any two or more configurations shown in the first to third embodiments may be combined.

Note that in the embodiment described above, a case has been described in which the microstructure forming apparatus 100 is provided with the air cylinder 65 as a moving means for moving the first rotating roller 60 relative to the second rotating roller 70. However, the moving means is not limited to this, and in order to position the first rotating roller 60 with higher accuracy, the moving means may be constituted by an actuator or the like.

10 Base film 11 Cushion film 12 Protective film 13 Fine structure forming film 15 First laminate 16 Second laminate 20 Film conveying section 21 First winding roller 22 Second winding roller 23 Third winding roller 25 First Take-up roller 26 Second take-up roller 31 Tensioner 32 Tensioner 33 Tensioner 34 Tensioner 35 Tensioner 36 Tensioner 37 Tensioner 41 Tensioner 42 Tensioner 43 Tensioner 44 Tensioner 45 Tensioner 46 Tensioner 47 Tensioner 50 Fine structure forming section 60 First rotating roller 65 Air cylinder 70 Second rotating roller 71 Hollow part 72 Back region 73 Front region 74 Opposing position 80 Second heating means 89 Mold 90 Cooling means 91 Cold air supply section 95 Release angle adjustment roller 100 Fine structure forming device

Claims (8)

A microstructure forming device used to continuously form a microstructure along the longitudinal direction of a base film, the device comprising:
a microstructure forming part that continuously forms the microstructure on one surface of the base film along the longitudinal direction of the base film;
While continuously supplying the base film to the fine structure forming section along the conveying direction, in the fine structure forming section, the base film on which the fine structure is formed is continuously supplied along the conveying direction. and a film transport section that receives the film.
The film conveying section is located upstream of the fine structure forming section in the conveying direction, and is located further upstream than the first unwinding roller around which the base film is wound and the fine structure forming section in the conveying direction. a first winding roller located on the downstream side that winds up the base film on which the fine structure is formed, and the base film unwound from the first unwinding roller is attached to the fine structure forming section. The substrate film is continuously supplied to the base film, and the base film on which the fine structure is formed in the fine structure forming section is wound up by the first winding roller,
The fine structure forming part is located between the first unwinding roller and the first take-up roller in the conveyance direction, and comes into contact with the other surface of the base film midway in the longitudinal direction, a first rotating roller that rotates while being wound around; and a first rotating roller that is disposed opposite to the first rotating roller on the downstream side of the first rotating roller, and that the one surface of the base film is in contact with the middle of the longitudinal direction of the one surface; a second rotating roller that rotates while being wound around; a mold that is provided on the outer peripheral surface of the second rotating roller and has a convex portion corresponding to the shape of the fine structure; and the first rotation of the second rotating roller. a second heating means for heating a rear area including a facing position facing the roller and a rear position behind the facing position with respect to the rotational direction of the second rotating roller; and a front position ahead of the facing position. and a cooling means for cooling a front area including the first rotating roller, and at the position where the first rotating roller and the second rotating roller are arranged facing each other, a separation distance between the first rotating roller and the second rotating roller is The size of the base film is set such that it can be held between the first rotating roller and the second rotating roller, and the size of the base film is set to be such that it can be held between the first rotating roller and the second rotating roller, and the holding of the base film between the first rotating roller and the second rotating roller causes the base film to be held between the first rotating roller and the second rotating roller. The mold provided on a one-rotation roller is pressed against the one surface of the base film, thereby forming the fine structure on the one surface of the base film. A microstructure forming device characterized by: The second rotating roller includes a hollow part,
2. The microstructure forming apparatus according to claim 1, wherein the second heating means comprises a heating unit disposed within the hollow portion and provided corresponding to the rear region. 3. The microstructure forming apparatus according to claim 1, wherein the cooling means includes a cold air supply section that is disposed outside the second rotating roller and blows cold air toward the front area. 4. The microstructure forming apparatus according to claim 3, wherein the microstructure forming section further includes a first heating means for heating the first rotating roller. The fine structure forming section further includes a moving means for adjusting the distance between the first rotating roller and the second rotating roller at the opposing position where the first rotating roller and the second rotating roller face each other. The microstructure forming apparatus according to claim 1, comprising: The film transport section further includes a second unwinding roller, which is located upstream of the fine structure forming section in the transport direction, and has a cushion film wound thereon, and a second unwinding roller located upstream of the fine structure forming section in the transport direction. a second winding roller located on the upstream side and winding up the cushion film;
Prior to the cushion film unwound from the second unwinding roller being continuously supplied to the first rotating roller, the cushion film is overlapped on the other surface of the base film, After that, the first laminate in which the cushion film and the base film are stacked is sandwiched between the first rotating roller and the second rotating roller, and then the cushion is peeled off from the first laminate. The microstructure forming apparatus according to claim 1, wherein the film is configured to be continuously wound by the second take-up roller. The film transport section further includes a third unwinding roller located downstream of the fine structure forming section in the transport direction, and around which a protective film is wound.
Before the base film on which the fine structure has been formed in the fine structure forming section is wound up by the first winding roller, the protective film is superimposed on the one surface of the base film. 2. The microstructure forming apparatus according to claim 1, wherein the second laminate in which the protective film and the base film are stacked is continuously wound up by the first winding roller. . The microstructure forming apparatus according to claim 1, wherein the base film is mainly composed of a thermoplastic resin.

Images