JP2014100620A - Method of hardening activation energy ray hardenable substance and activation energy ray irradiation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of hardening an activation energy ray hardenable substance and an activation energy ray irradiation apparatus which can prevent curling of a sheet applied with an activation energy ray hardenable substance when the activation energy ray hardenable substance is hardened.SOLUTION: A method is for irradiating a membrane-like body M consisting of an active energy ray hardenable substance formed on the surface of a sheet-like member BS with activation energy rays to harden the membrane-like body M. The position where the membrane-like body M is irradiated with activation energy rays is shifted from the center to the outer edge of the membrane-like body M along the surface of the membrane-like body M. The method allows hardening of the membrane-like body M from the center to the outer edge sequentially and thereby suppresses occurrence of an internal stress inside the membrane-like body M, leading to suppression of curling of the sheet-like member BS due to hardening of the membrane-like body M.

Description

  The present invention relates to a method for curing an active energy ray-curable substance and an active energy ray irradiation apparatus. More specifically, a curing method and activity of an active energy ray-curable substance that cures a substance by irradiating the active energy ray to a film or sheet formed of the substance that is cured by an active energy ray such as an ultraviolet ray or an electron beam. The present invention relates to an energy beam irradiation device.

  Active energy ray-curable substances that are cured by active energy rays such as ultraviolet rays and electron beams (hereinafter simply referred to as curable substances) can be easily formed into a predetermined shape or formed into a sheet shape. Used in. For example, it is used as a material for a substrate such as a solar cell or a display, and is also used as a material for a protective film of a hard coat film that protects the surface of a touch panel or the like.

For example, when the protective film of the hard coat film is formed of a curable material, the protective film is formed by the following method.
First, a curable substance is dissolved with a solvent to form a liquid or paste. Next, the liquid or paste-like curable substance is applied to the surface of the sheet on which the protective film is formed. Furthermore, after the curable material applied to the surface of the sheet is heated to remove the solvent, the curable material is irradiated with active energy rays. Then, since the curable substance is polymerized and cured, a protective film made of the curable substance is formed on the surface of the sheet. When the curable material is cured, it is laminated in close contact with the sheet.

  On the other hand, since the curable substance is polymerized and cured, shrinkage occurs when it is cured. When such shrinkage occurs, stress due to shrinkage of the curable substance is applied to the sheet on which the protective film is formed. That is, when a film formed of a curable substance shrinks, the film also shrinks in the direction along the sheet surface, so that stress corresponding to the amount of film shrinkage is applied to the sheet. Then, when the sheet cannot support this stress as in the case where the sheet is a film or the like, the sheet curls (warps).

Such curling may be suppressed by reducing the amount of shrinkage of the curable material in the direction along the sheet surface (hereinafter simply referred to as the amount of shrinkage of the curable material).
As a technique for suppressing the shrinkage amount of the curable substance, for example, Patent Document 1 discloses that a polymer film containing an ultraviolet curing agent applied to the surface of a support film is polymerized by polymerizing a plurality of polymer films. Techniques performed in the process are disclosed. In this technique, curling is prevented by performing a relaxation step of relaxing internal stress generated due to polymerization during the polymerization step.

  In Patent Document 1, the polymer film is not completely polymerized in one polymerization step, and the fluidity is maintained in the polymer film, and the polymer film in a state where the fluidity is maintained is relaxed. It is described that curling due to internal stress can be prevented because internal stress can be relaxed by performing the process.

JP 2011-152525 A

  However, even in the technique of Patent Document 1, when the polymer film is irradiated with ultraviolet rays while continuously conveying the support film on which the polymer film is formed, the polymer film has almost the entire region in the width direction of the support film. At the same time, ultraviolet rays are irradiated. Then, even if the polymer film is not completely polymerized, polymerization occurs in almost the entire area in the width direction of the support film, that is, the portion irradiated with ultraviolet rays. For this reason, even if a relaxation process is implemented, it is difficult to suppress the internal stress generated inside the polymer film in the width direction of the support film.

  In addition, when uniform polymerization and uniform relaxation cannot be caused, internal stress may vary in the width direction of the support film. Then, there is a possibility that the sheet will wave.

  In view of the above circumstances, the present invention is a method for curing an active energy ray-curable material capable of preventing warpage of a sheet provided with the active energy ray-curable material when the active energy ray-curable material is cured, and An object is to provide an active energy ray irradiation apparatus.

(Method of curing active energy ray curable substance)
The method for curing an active energy ray-curable material according to the first aspect of the present invention comprises irradiating an active energy ray on a film-like body made of an active energy ray-curable substance formed on the surface of a sheet-like member, The position where the active energy rays are irradiated to the film-like body is moved from the center of the film-like body toward the outer edge along the surface of the film-like body. Features.
The curing method of the active energy ray-curable material of the second invention is the first invention, wherein the film-like body is conveyed along a direction parallel to the surface of the film-like body, In the orthogonal direction, the irradiation region where the active energy rays are irradiated to the film-like body is moved from the center toward the outer edge as the film-like body moves.
According to a third aspect of the present invention, there is provided a method for curing an active energy ray-curable substance, wherein the active energy ray is irradiated onto the film-like body so that the irradiation region is substantially V-shaped. .
(Active energy ray irradiation device)
An active energy ray irradiation apparatus according to a fourth aspect of the invention is an apparatus for irradiating an active energy ray to a film-like body made of an active energy ray curable substance formed on the surface of a sheet-like member, and radiating the active energy ray. An active energy ray irradiating means having a radiation source for irradiating and a position where the active energy ray is irradiated to the film-like body from the center of the film-like body toward the outer edge along the surface of the film-like body. And an irradiation position adjusting means that is moved.
The active energy ray irradiation apparatus according to a fifth aspect of the present invention is the active energy ray irradiation device according to the fourth aspect, wherein the irradiation position adjusting means has a function of conveying the film-like body along a direction parallel to the surface thereof. The irradiating means irradiates the film-like body with the active energy ray so that an irradiation region where the active energy ray is irradiated onto the film-like body is substantially V-shaped. To do.
The active energy ray irradiating apparatus according to a sixth aspect of the present invention is the active energy ray irradiating apparatus according to the fifth aspect, wherein the active energy ray irradiating means irradiates the film-like body from the radiation source between the film-like body and the radiation source. A shielding member that shields active energy rays is provided, and the shielding member is provided with an active energy ray transmitting portion that transmits the active energy rays.
The active energy ray irradiation apparatus according to a seventh aspect of the invention is characterized in that, in the fourth invention, the irradiation position adjusting means moves the active energy ray irradiation means.

(Method of curing active energy ray curable substance)
According to the first invention, the film-like body can be cured from the center thereof, and can be sequentially cured from the center toward the outer edge. Then, when the hardened | cured area | region spreads, it can suppress that an internal stress generate | occur | produces between the inside of a film-like body, or between a film-like body and a sheet-like member. Therefore, curling of the sheet-like member due to the hardening of the film-like body can be suppressed.
According to the second invention, in the width direction of the film-like body, generation of internal stress along the width direction can be suppressed. Therefore, curling of the sheet-like member can be suppressed even when the film-like member is cured while transporting the sheet-like member having the film-like member formed on the surface.
According to the third aspect of the invention, since the irradiation area is substantially V-shaped, the position where the active energy rays are irradiated simply by transporting the film-like body is sequentially increased from the center in the width direction of the film-like body. Can be moved. Therefore, the movement of the irradiation region irradiated with the active energy ray can be realized with a simple configuration.
(Active energy ray irradiation device)
According to the fourth aspect of the invention, if the position where the active energy ray is irradiated from the active energy ray irradiating means to the film-like body is moved by the irradiation position adjusting means, the film-like body is cured from the center. Can be cured sequentially from the center toward the outer edge. Then, when the hardened | cured area | region spreads, it can suppress that an internal stress generate | occur | produces between the inside of a film-like body, or between a film-like body and a sheet-like member. Therefore, curling of the sheet-like member due to the hardening of the film-like body can be suppressed.
According to the fifth aspect of the invention, since the irradiation area where the active energy ray is irradiated from the active energy ray irradiating means is substantially V-shaped, the active energy ray is irradiated only by transporting the film-like body. The position to be moved can be sequentially moved in the width direction from the center in the width direction of the film-like body. Therefore, the movement of the irradiation region irradiated with the active energy ray can be realized with a simple configuration.
According to the sixth aspect of the present invention, the active energy ray irradiated from the radiation source is shielded by the shielding member, and only the active energy ray that has passed through the active energy ray transmitting portion is irradiated to the film-like body. That is, since the irradiation region is limited by limiting the region where the active energy ray is irradiated to the film-like body, a predetermined irradiation region can be formed regardless of the shape and arrangement of the radiation source.
According to the seventh invention, if the active energy ray irradiating means is moved by the irradiation position adjusting means, the position where the active energy ray is irradiated to the film-like body is sequentially moved from the center in the width direction of the film-like body in the width direction. Can be made.

It is a schematic explanatory drawing of the active energy ray irradiation apparatus 1 of this embodiment, Comprising: (A) is a top view, (B) is a BB sectional drawing of (A). It is a schematic explanatory drawing of the state which has irradiated the active energy ray and hardened the film-like body M, (a)-(c) is aa line of FIG. 1, bb line, cc line of FIG. It is each sectional drawing. It is the figure which showed other embodiment of the active energy ray irradiation means. It is the figure which showed other embodiment of the active energy ray irradiation means.

  The method for curing an active energy ray-curable substance of the present invention is a method for curing a film-like body formed on the surface of a sheet-like member, and suppresses the generation of internal stress when the film-like body is cured, This is a method that can prevent the sheet-like member from curling (warping) when the film-like body is cured.

  Here, the film-like body cured by the method of curing an active energy ray-curable material of the present invention (hereinafter simply referred to as a film-like body) is polymerized and cured by irradiation with active energy rays. It is formed by a composition whose volume decreases. Examples of the composition of the film-like body include ultraviolet curable monomers and oligomers such as (meth) acrylates, polyfunctional (meth) acrylates, epoxies, and siloxane compounds having functional groups such as double bonds, and polymerization initiators. However, it is not limited to these. Moreover, the curable substance in the present invention includes not only those that are polymerized by active energy rays and shrink-cured as described above, but also those that are crosslinked and cured by active energy rays.

  The active energy ray may be any one that polymerizes or crosslinks the film-like composition as described above, and an appropriate one that matches the composition of the film-like substance can be used. The active energy rays are not particularly limited, and for example, ultraviolet rays or electron beams can be used.

  Furthermore, the sheet-like member that forms a film-like body on the surface is not particularly limited. Examples of the sheet-like member include a polyester film, a polyethylene film, a polypropylene film, a cellulose film, a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol film, a polystyrene film, a polycarbonate film, a cycloolefin polymer film, and a norbornene resin system. Film, polymethylpentene film, polyetherketone film, polyethersulfone film, polysulfone film, polyetherketoneimide film, polyamide film, fluororesin film, acrylic film, etc., and these films are laminated in two or more layers And the like. In addition, the sheet-like member may be used as a base film, as a release film in which at least one of the films is easily peeled, or as an endless belt.

  The use of the cured film is not particularly limited. For example, if it is a sheet-like transparent resin substrate obtained by forming a cured film-like body on a release film and peeling off the release film, this transparent resin substrate is used for a liquid crystal display device or an organic EL display. It can be used as a substrate, a substrate for organic EL lighting, a solar cell substrate, a printed wiring board, a flexible printed wiring board, and the like. In addition, when the sheet-like member is a base film, and a film-like body is formed on the surface of the base film and cured, the hardware for protecting the front surface of a liquid crystal display device, an organic EL display, a plasma display, etc. It can be used as a coat film.

(Description of active energy ray irradiation device)
First, the apparatus (active energy ray irradiation apparatus 1 of this embodiment) used for the hardening method of the active energy ray curable substance of this invention is demonstrated.
In addition, in each figure used for description below, in order to make the description easy to understand, the relative size of each member of the film-like body, the sheet-like member BS, and the active energy ray irradiation apparatus 1 is not necessarily the same as the actual one. It is not a ratio.

  In FIG. 1, the code | symbol M has shown the film-form body mentioned above, and the code | symbol BS has shown the sheet-like member in which the film-form body M was formed in the surface. The film-like body M and the sheet-like member BS having the film-like body M formed on the surface are collectively referred to as a processing target sheet S below.

  As shown in FIG. 1, the active energy ray irradiation apparatus 1 of the present embodiment includes a main body case 2. The main body case 2 has a hollow space 2h inside, and has a pair of openings that allow the hollow space 2h to communicate with the outside. The pair of openings is provided to supply and carry out the processing target sheet S in the space 2 h of the main body case 2. Specifically, the processing target sheet S is carried into the space 2h from one (lower in FIG. 1A, left in FIG. 1B) opening, and the other (upper in FIG. 1A). The processing target sheet S is carried out from the opening 1) on the right side of FIG.

  As shown in FIG. 1, active energy ray irradiation means 3 is provided in a space 2 h of the main body case 2. This active energy ray irradiating means 3 includes a plurality of radiation sources 3 a and a shielding member 5.

First, the plurality of radiation sources 3a can emit active energy rays. FIG. 1 illustrates a case where a plurality of rod-shaped radiation sources 3 a are used and the axial directions of the plurality of radiation sources 3 a are arranged so as to be orthogonal to the conveyance direction of the processing target sheet S.
The plurality of radiation sources 3 a are disposed above the processing target sheet S located in the space 2 h of the main body case 2. That is, the plurality of radiation sources 3 a are provided so that the active energy rays to be emitted can be irradiated onto the surface of the processing target sheet S, that is, the film-like body M of the processing target sheet S.

  As shown in FIG. 1, the shielding member 5 is provided between the plurality of radiation sources 3 a and the processing target sheet S. The shielding member 5 includes an active energy ray transmitting portion that transmits an active energy ray. The active energy ray transmitting portion is a portion that allows the processing target sheet S to be irradiated with a part of the active energy rays emitted from the plurality of radiation sources 3a. In other words, the shielding member 5 has a function of restricting active energy rays irradiated on the surface of the film-like body M of the processing target sheet S.

  Specifically, the shielding member 5 is formed of a material that does not transmit active energy rays, and is provided so as to cover the processing target sheet S located in the space 2 h of the main body case 2. The shielding member 5 is formed with a through hole 5 h that penetrates the shielding member 5. The through hole 5h is formed in a V shape that spreads toward the downstream side in the moving direction of the processing target sheet S. That is, the active energy rays emitted from the plurality of radiation sources 3a are shielded by the shielding member 5 so that a V-shaped irradiation region is formed on the surface of the film-like body M of the processing target sheet S. .

(Method of curing active energy ray curable substance)
The operation | work (namely, the hardening method of an active energy ray curable substance) which hardens the film-like body M of the process target sheet S conveyed continuously by the active energy ray irradiation apparatus 1 of this embodiment is demonstrated.
In the following description, the case where the film-like body M is formed to be a continuous film on the surface of the sheet-like member BS will be described. However, the film-like body M is intermittently provided on the surface of the sheet-like member BS. Even when formed, each film-like body M can be similarly cured.

  First, on the upstream side of the active energy ray irradiating apparatus 1, the sheet-like member BS is unwound from a raw fabric or the like. And the composition of the film-like body M is supplied to the surface of the sheet-like member BS drawn out from the raw fabric. Then, a film-like body M having a predetermined thickness is formed on the surface of the sheet-like member BS, and a processing target sheet S having the film-like body M is formed. The method for forming the film-like body M on the surface of the sheet-like member BS can be, for example, a method such as coating, but is not particularly limited.

  The processing target sheet S on which the film-like body M is formed is conveyed into the main body case 2 of the active energy ray irradiation apparatus 1. In the main body case 2, the surface of the film-like body M is irradiated with active energy rays emitted from the plurality of radiation sources 3 a of the active energy ray irradiating means 3.

  Here, since the active energy rays emitted from the plurality of radiation sources 3a are partially shielded by the shielding member 5, the irradiation region formed on the surface of the film M is substantially V-shaped. Then, in the substantially V-shaped irradiation region, the film M is cured as shown in FIG.

  First, as shown in FIG. 2A, the through hole 5 h of the shielding member 5 is formed only in a narrow region at the center in the width direction of the shielding member 5 at the position of the cross section aa in FIG. 1. Only the active energy rays that have passed through the region are irradiated on the surface of the film M. Then, the film M is cured only in a narrow region irradiated with the active energy ray. That is, the cured portion HM is formed only in the center portion of the film-like body M in the width direction.

  On the other hand, in the film-like body M, the active energy ray is not irradiated to the region between the cured portion HM and the outer edge portion in the width direction, so that the film-like body M in this region remains in an uncured state. Uncured portion SM.

  Here, when the cured portion HM is formed, the composition of the film-like body M contracts due to polymerization or the like. For this reason, the hardened portion HM is thinner than the uncured portion SM and contracts slightly in the width direction, so that internal stress along the width direction may be generated in the hardened portion HM. . For example, in the cured portion HM, the bond between the film-like body M and the sheet-like member BS is also strong. Then, when the cured portion HM contracts, a force (internal stress) that pulls the sheet-like member BS in the contracting direction may occur.

  However, as described above, in the active energy ray irradiation device 1 of the present embodiment, the active energy ray is irradiated in a width direction of the film-like body M in a region narrower than the width of the film-like body M. The width of the portion HM is also narrowed. Then, when the cured portion HM contracts, the amount of contraction in the width direction can be reduced. In addition, the uncured portions SM located on both sides of the cured portion HM are maintained in a movable state along the surface of the sheet-like member BS. Then, when the cured portion HM contracts in the width direction, the uncured portion SM moves at the boundary with the uncured portion SM, so that no internal stress is generated except for the cured portion HM. Therefore, even if the cured portion HM is formed in the film-like body M at the position of the aa cross section in FIG. 1, generation of force that pulls the sheet-like member BS in the contraction direction can be suppressed.

  In the processing target sheet S in which the cured portion HM is formed at the center of the film-like body M at the position of the aa cross section in FIG. 1, the cured portion HM spreads while moving to the position of the bb cross section in FIG. (FIG. 2 (b)). This is because the width of the through hole 5h of the shielding member 5 is widened between the position of the cross section aa in FIG. 1 and the position of the cross section bb in FIG.

  Here, since the width of the through hole 5h of the shielding member 5 gradually increases between the position of the cross section aa in FIG. 1 and the position of the cross section bb in FIG. As the sheet S moves, it gradually spreads in the width direction. That is, since the region where curing proceeds simultaneously in the cured portion HM is narrow, even if the cured portion HM of the film-like body M spreads, the generation of a force that pulls the sheet-like member BS in the shrinking direction is suppressed. .

  When the processing target sheet S moves to the position of the cc cross section in FIG. 1, the width of the cured portion HM is further widened, but for the reason described above, generation of force that pulls the sheet-like member BS in the shrinking direction is suppressed. .

  Finally, the whole of the film-like body M in the width direction becomes the cured portion HM. When the cured portion HM is formed, the sheet-like member BS is shrunk in the width direction of the sheet-like member BS (that is, in the width direction). ) Generation of the pulling force is suppressed. For this reason, even if the whole of the film-like body M in the width direction becomes the cured portion HM, the internal stress remaining in the film-like body M (that is, the internal stress in the direction along the width direction of the film-like body M) is reduced. Can be small. Therefore, even if the film-like body M is cured, the processing target sheet S can be prevented from curling in the width direction.

  The processing target sheet S in which the entire width direction of the film-like body M is the cured portion HM is wound on a roll as it is to become a product roll, or a film obtained by removing the sheet-like member BS from the processing target sheet S and curing it. Only the state body M can be wound up into a product roll.

  Moreover, when winding only the film-like body M, it may be made into a roll shape by sandwiching another protective sheet so that the film-like bodies M do not contact each other.

  Furthermore, when the sheet-like member BS is an endless belt, the sheet-like member BS can be easily peeled from the processing target sheet S at the end of the endless belt.

  Further, in the above example, the case where the active energy ray is irradiated with the surface of the film-like body M exposed is described. However, after the film-like body M is formed on the surface of the sheet-like member BS, the film-like body M is formed. You may make it arrange | position a sheet-like cover member (cover film) further on the surface of this. In this case, if a material that transmits active energy rays is used as the cover member, even if the cover member is provided, the active energy rays can be applied to the film body M, and the film body M is cured. Good that you can.

  It is also possible to use a material that transmits active energy rays as the material of the sheet-like member BS. In this case, since the active energy rays can be applied to the film-like body M from both the front and back sides, the contracted state in the thickness direction can be made closer to the cured film-like body M uniformly. In particular, if the same thing as the sheet-like member BS is overlapped as a cover member on the surface of the film-like body M, the irradiation state of the active energy rays can be made the same on both the front and back sides of the film-like body M.

(About shielding member 5)
In addition, the raw material of the shielding member 5 will not be specifically limited if it does not permeate | transmit an active energy ray. For example, a metal plate such as stainless steel or aluminum, an inorganic plate such as ceramic or glass, or a resin plate can be employed. Among these, when heat is easily generated by irradiation with active energy rays, it is particularly preferable to employ a metal plate such as stainless steel or aluminum, an inorganic plate such as ceramic or glass, or a heat-resistant resin plate.

  Further, the shape of the active energy ray transmitting portion such as the through-hole 5h formed in the shielding member 5 is not limited to a substantially V shape, and the irradiation region moves in the width direction as it goes downstream in the conveyance direction of the processing target sheet S. It only has to come to do. For example, the active energy ray transmitting portion may be formed in a triangular shape. However, if the shape is substantially V-shaped, the active energy ray is not irradiated to the already cured region. Therefore, if it is necessary to prevent the curing from proceeding more than necessary, the region is substantially V-shaped. Is preferable.

  Furthermore, in the shielding member 5, the active energy ray transmitting portion may be realized by any structure. For example, a part of the shielding member 5 may be formed of a material that transmits active energy rays to form an active energy ray transmitting portion. However, when the through-hole 5h is formed as the active energy ray transmitting portion, the active energy ray-transmitting portion can be formed simply by forming the through-hole 5h in the shielding member 5, so that the shielding member 5 can be easily manufactured. The advantage of becoming is obtained.

(About radiation source 3a)
In the above example, the case where the plurality of radiation sources 3a are rod-shaped and the axial directions thereof are arranged to be orthogonal to the conveyance direction of the processing target sheet S has been described. However, the plurality of radiation sources 3a may be arranged such that the axial direction thereof is parallel to the conveyance direction of the processing target sheet S.

Further, as shown in FIG. 3A, a radiation source 3a may be arranged. Specifically, the two radiation sources 3a are positioned so that the upstream end (the lower end in FIG. 3) of the processing target sheet S in the conveyance direction is substantially in the middle in the width direction of the processing target sheet S. It arrange | positions so that the distance between both the radiation sources 3a may become large as it goes to the conveyance direction downstream (upward in FIG. 3) of the process target sheet S. In this case, the irradiation area where the active energy ray is irradiated onto the film-like body M of the processing target sheet S is substantially V-shaped. Then, without providing the shielding member 5 as described above, as the processing target sheet S is conveyed, the irradiation area where the active energy rays are irradiated to the film M of the processing target sheet S is changed from the center to the outer edge. Can be moved toward.
Even when three radiation sources 3a are arranged as shown in FIGS. 3B and 3C, the same effect as in FIG. 3A can be obtained.

  Of course, even when the radiation source 3a is arranged as described above, the shielding member 5 may be provided between the radiation source 3a and the processing target sheet S. For example, if the active energy ray emitted from the radiation source 3a is irradiated to the film-like body M of the processing target sheet S with a certain extent, the active energy ray is irradiated if the shielding member 5 is provided. There is an advantage that the irradiation area can be limited.

  Further, as the radiation source 3a, a point-like radiation source having excellent directivity such as an LED light source or a plurality of such point-like radiation sources arranged may be used. In this case, on the surface of the film-like body M of the processing target sheet S, the region irradiated with the active energy rays irradiated by the respective point sources can be narrowed. Then, even if it does not provide the shielding member 5, an irradiation area | region can be limited more appropriately. For example, if the source 3a in FIG. 3A is a substrate in which a plurality of point sources are arranged on a substrate, the source 3a is projected onto the surface of the film-like body M of the processing target sheet S. An irradiation region can be formed.

(When the processing target sheet S does not move)
In the above example, the case where the processing target sheet S is transported, that is, the case where the irradiation region moves with the movement of the processing target sheet S has been described.
On the other hand, when the processing target sheet S is not moved, if the active energy ray irradiating means 3 is configured as follows, the irradiation area irradiated with the active energy ray is formed on the surface of the film M of the processing target sheet S. And can be moved from the center toward the outer edge.

FIG. 4 is a schematic explanatory diagram of a state where the active energy ray is viewed from the processing target sheet S side.
FIG. 4A shows a state where a plurality of radiation sources 3a are arranged concentrically. When a plurality of radiation sources 3a are arranged in this way, a control unit that controls the operation of the plurality of radiation sources 3a is provided. And the operation | movement of the several radiation source 3a is controlled by this control part so that the radiation source 3a which irradiates an active energy ray may switch to the outward from a center sequentially. Then, the irradiation region where the active energy rays are irradiated onto the film-like body M of the processing target sheet S can be moved from the center toward the outer edge.

  Further, as shown in FIG. 4B, a plurality of radiation sources 3a may be provided so as to move radially from the center. For example, a rail is provided radially on the ceiling of the main body case 2, and a moving mechanism is provided for moving the plurality of radiation sources 3a along the rail. Then, if the plurality of radiation sources 3a are moved outward from the center by the moving mechanism, the region irradiated with the active energy rays on the film M of the processing target sheet S can be sequentially moved outward from the center. it can.

The control unit that controls the operation of the plurality of radiation sources 3a in FIG. 4A and the movement mechanism that moves the plurality of radiation sources 3a along the rail correspond to the irradiation position adjusting means in the claims. To do.
Further, when the processing target sheet S is moved, the mechanism for moving the processing target sheet S corresponds to the irradiation position adjusting means in the claims.

  The method for curing an active energy ray-curable material of the present invention is suitable as a method for producing a protective film (hard coat layer) on a substrate film or a substrate film such as a solar cell or a display.

DESCRIPTION OF SYMBOLS 1 Active energy ray irradiation apparatus 3 Active energy ray irradiation means 3a Radiation source 5 Shielding member 5h Through-hole S Process target sheet BS Sheet-like member M Film-like body SM Uncured part HM Cured part

Claims (7)

A method of irradiating an active energy ray to a film-like body made of an active energy ray-curable substance formed on the surface of a sheet-like member to cure the film-like body,
Active energy ray curable, characterized in that the position where the active energy ray is irradiated to the film-like body is moved along the surface of the film-like body from the center of the film-like body toward the outer edge. The curing method of the substance. In the case where the film-like body is conveyed along a direction parallel to the surface thereof,
In the direction perpendicular to the conveying direction of the film-like body, the irradiation area where the active energy rays are irradiated to the film-like body is moved from the center toward the outer edge as the film-like body moves. The method for curing an active energy ray-curable material according to claim 1. 3. The method of curing an active energy ray-curable material according to claim 2, wherein the active energy ray is applied to the film-like body so that the irradiation region is substantially V-shaped. An apparatus for irradiating active energy rays to a film-like body made of an active energy ray-curable substance formed on the surface of a sheet-like member,
Active energy ray irradiating means having a radiation source for emitting active energy rays;
Irradiation position adjusting means for moving the position where the active energy ray is irradiated to the film-like body from the center of the film-like body toward the outer edge along the surface of the film-like body. The active energy ray irradiation apparatus characterized by the above-mentioned. The irradiation position adjusting means is
Having a function of conveying the film-like body along a direction parallel to the surface thereof;
The active energy ray irradiation means includes:
5. The active energy ray is applied to the film-like body so that an irradiation region where the active energy ray is irradiated onto the film-like body is substantially V-shaped. The active energy ray irradiation apparatus as described. The active energy ray irradiation means includes:
A shielding member that shields the active energy ray irradiated from the radiation source to the film-like body is provided between the film-like body and the radiation source.
6. The active energy ray irradiating apparatus according to claim 5, wherein the shielding member is provided with an active energy ray transmitting portion that transmits the active energy ray. The irradiation position adjusting means is
The active energy ray irradiation apparatus according to claim 4, wherein the active energy ray irradiation means is moved.

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