JP2014137575A - Method for manufacturing light control film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a light control film by which a light control film having weather resistance such as resistance to degradation by UV rays and having a heat ray selective absorbing function can be manufactured with a high yield while reducing waste of a raw film material.SOLUTION: The method for manufacturing a light control film includes steps of: preparing a heat ray selective absorbing film which includes a light-transmitting part formed of a UV curable resin and having patterned portions long and extending in a thickness direction and arranged in parallel to one another and includes a heat ray absorbing part containing an IR absorbing material in the patterned portions; preparing a UV absorbing layer or a UV absorbing film containing a UV absorbing material; and laminating the heat ray selective absorbing film 10 with the UV absorbing layer 20 or the UV absorbing film 30. The method can be configured in such a way that the UV absorbing film is formed of an electron beam-curable resin, and that an adhesive layer is disposed by transferring onto one of the surfaces of the heat ray selective absorbing film, one surface opposite to the surface where the UV absorbing film is disposed.

Description

  The present invention relates to a method for producing a light control film, and more particularly relates to a production method capable of producing a light control film having weather resistance such as ultraviolet ray resistance and having a heat ray absorbing function with high yield.

  A light control film has been proposed that can suppress the intake of sunlight into the room in the summer to prevent the room from becoming too hot, and can increase the intake of sunlight into the room in the winter to warm the room. ing. For example, in Patent Document 1, the entire sheet includes a light transmissive portion made of a light transmissive material that transmits sunlight and a light shielding portion group made of a light absorbing material that absorbs sunlight, and the light shielding portion. There has been proposed a light control film in which a plurality of light-shielding portions made of a light-absorbing material are arranged at a predetermined pitch in one direction within a sheet.

  The light-transmitting part constituting the light control film is formed by shaping a light-transmitting material provided on the film substrate, and the light-shielding part group is a light-absorbing material in the recessed part of the shaped light-transmitting part. It is formed by filling. Specifically, the light control film is formed by applying an ultraviolet curable resin on a film substrate, shaping the applied ultraviolet curable resin with a roll-shaped shaping die, and maintaining the shaping state. UV light is irradiated from the opposite side of the shaping mold to cure the UV curable resin, the cured UV curable resin is peeled off from the roll-shaped shaping mold, and the shaped recess is filled with a light absorbing material. It was manufactured by. The roll-shaped shaping mold is a roll mold having on the surface a group of concave stripes (same shape as the prism portion and reverse irregularities) arranged so as to obtain parallel prisms.

JP 2010-259406 A

  The light control film described above is used by being bonded to a window glass or the like exposed to sunlight. In order for the light control film to have UV resistance that does not deteriorate due to UV light, UV light is applied to the opposite side of the film substrate on which the light-transmitting portion made of UV-curable resin is formed. It was examined to provide an ultraviolet absorbing layer (also referred to as a weather resistant layer) containing an absorbing material. Then, consider adding light resistance to the light control film by attaching the light control film to a window glass or the like so that the surface on which the weather resistant layer is provided is on the side exposed to ultraviolet rays. did.

  On the other hand, in the conventional manufacturing method of the light control film described above, the light transmissive portion is formed by irradiating the ultraviolet curable resin with ultraviolet rays. Irradiation with ultraviolet rays is performed from the side of the film base opposite to the shaping mold in a state where the ultraviolet curable resin is shaped with a roll-shaped shaping mold. At this time, when an ultraviolet absorbing layer containing an ultraviolet absorbing material is previously provided on the surface of the film base on which the ultraviolet curable resin is not applied, the ultraviolet absorbing material contained in the ultraviolet absorbing layer absorbs ultraviolet rays and absorbs ultraviolet rays. There arises a problem of inhibiting the curing of the curable resin. To deal with these problems, an ultraviolet curable resin is applied to one side of the film substrate, and a light transmissive part is formed by irradiating ultraviolet rays while shaping, and then the other side of the film substrate absorbs ultraviolet rays. A method of coating and forming the layer was studied.

  However, as described above, the method of coating and forming the ultraviolet absorbing layer on the film substrate after providing the light transmissive portion requires that the light transmissive portion having a high material cost be formed on the film substrate first. Don't be. In the process of coating the ultraviolet absorbing layer after forming such a light-transmitting part first, it is usually necessary to use an original fabric of several tens of meters or more for setting the coating conditions of the resin material including the ultraviolet absorbing material. In other words, the raw material of the film base material provided with the light transmissive portion was wasted. As a result, there is a problem that the yield of the entire light control film provided with the ultraviolet absorbing layer is lowered.

  Moreover, even if an ultraviolet ray absorbing layer is first formed on a film substrate and then irradiated with ultraviolet rays so as to form a light transmitting portion on the ultraviolet ray absorbing layer, the ultraviolet ray absorbing layer provided in advance is used. Since the ultraviolet rays are cut, it is difficult to cure the light transmissive portion made of the ultraviolet curable resin.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to use a light control film having weather resistance such as ultraviolet ray resistance and having a heat ray selective absorption function as a waste of raw material. An object of the present invention is to provide a method for manufacturing a light control film, which can be manufactured with good yield while suppressing the above.

  (1) A method for producing a light control film according to the present invention for solving the above-described problem is a light-transmitting portion formed of an ultraviolet curable resin and provided with elongated portions extending in the thickness direction. And a step of preparing a heat ray selective absorption film having a heat ray absorbing portion in which an infrared absorbing material is contained in the shaping portion, a step of preparing an ultraviolet absorbing layer or an ultraviolet absorbing film containing an ultraviolet absorbing material, And a step of bonding the heat ray selective absorption film and the ultraviolet absorbing layer or the ultraviolet absorbing film.

  In the method for producing a light control film according to the present invention, the heat ray selective absorption film is formed by first forming an ultraviolet curable resin on a film substrate, and shaping the ultraviolet curable resin in the thickness direction. A second step of forming a long and elongated concave shaped portion, and a third step of forming the light transmissive portion having the shaped portion by irradiating and curing the shaped ultraviolet curable resin with ultraviolet rays. You may form by the method of including the process and the 4th process of filling the infrared absorption material in the said shaping part, and forming the said heat ray absorption part.

  In the method for producing a light control film according to the present invention, the bonding is performed by thermal transfer, heat lamination, or dry lamination.

  (2) In the method for producing a light control film according to the present invention, the light control film is an externally-attached light control film, and the solar light side on which the ultraviolet absorbing layer is bonded on both surfaces of the heat ray selective absorption film The ultraviolet absorbing layer may be thermally transferred to this surface via a heat-fusible layer or by its own heat-fusibility.

  In the method for producing a light control film according to the present invention, the light control film is an externally-attached light control film, and the sun that bonds the ultraviolet absorbing layer or the ultraviolet absorbing film out of both surfaces of the heat ray selective absorbing film. The ultraviolet absorbing film may be heat laminated on the light-side surface through a heat-sealing layer or by its own heat-fusibility.

  In the method for producing a light control film according to the present invention, the light control film is an externally-attached light control film, and the sun that bonds the ultraviolet absorbing layer or the ultraviolet absorbing film out of both surfaces of the heat ray selective absorbing film. The ultraviolet absorbing layer or the ultraviolet absorbing film may be dry-laminated on the light side surface via an adhesive layer.

  In the method for producing a light control film according to the present invention, the light control film may be an externally attached light control film, and the ultraviolet absorbing layer or the ultraviolet absorbing film may be formed of an electron beam curable resin.

  In the method for producing a light control film according to the present invention, the light control film is an externally-attached light control film, and the sun that bonds the ultraviolet absorbing layer or the ultraviolet absorbing film out of both surfaces of the heat ray selective absorbing film. You may provide the adhesion layer for affixing on a to-be-adhered board in the surface opposite to the surface of a light side.

  (3) In the method for producing a light control film according to the present invention, the light control film is an inner-attached light control film, and the solar light side on which the ultraviolet absorbing layer is bonded on both surfaces of the heat ray selective absorption film On the surface, the adhesive ultraviolet absorbing layer may be thermally transferred or heat laminated via a heat-fusible layer or a heat-fusible film.

  In the method for producing a light control film according to the present invention, the light control film is an inner-attached light control film, and on both surfaces of the heat ray selective absorption film, the surface on the sunlight side where the ultraviolet absorbing layer is bonded. The adhesive UV-absorbing layer may be dry-laminated via an adhesive layer.

  According to the method for producing a light control film according to the present invention, a light control film having weather resistance such as ultraviolet ray resistance and having a heat ray selective absorption function is manufactured with a high yield while suppressing waste of the raw material. Can do.

  Specifically, since the method for producing a light control film according to the present invention includes a step of bonding a preliminarily prepared heat ray selective absorption film and an ultraviolet ray absorbing layer or an ultraviolet ray absorbing film, an ultraviolet ray is applied to the heat ray selective absorption film as in the past. A step of directly applying or printing a resin material including an absorbent material is not necessary. As a result, the waste of the raw material at the time of coating and printing can be eliminated, and the yield of the entire light control film can be improved. Moreover, since the ultraviolet ray absorbing layer and the ultraviolet ray absorbing film are provided on the heat ray selective absorption film prepared in advance, the ultraviolet ray curing at the time of forming the light transmissive portion constituting the heat ray selective absorption film is not hindered.

It is a flowchart of the manufacturing method of the light control film which concerns on this invention. It is typical sectional drawing which shows an example of the 1st manufacturing form (outside sticking type | mold) of a light control film. It is typical sectional drawing which shows another example of the 1st manufacturing form (outside sticking type | mold) of a light control film. It is typical sectional drawing which shows an example of the 2nd manufacturing form (outside sticking type | mold) of a light control film. It is typical sectional drawing which shows another example of the 2nd manufacturing form (outside sticking type | mold) of a light control film. It is typical sectional drawing which shows an example of the 3rd manufacture form (outside sticking type | mold) of a light control film. It is a typical sectional view showing other examples of the 3rd manufacture form (outside sticking type) of a light control film. It is typical sectional drawing which shows an example of the 6th manufacture form (internal bonding type | mold) of a light control film. It is typical sectional drawing which shows another example of the 6th manufacture form (internal sticking type | mold) of a light control film. It is typical sectional drawing which shows an example of the 7th manufacture form (internal sticking type | mold) of a light control film. It is typical sectional drawing which shows another example of a heat ray selective absorption film. It is a schematic diagram explaining the function of the light control film bonded together to the window. It is detailed explanatory drawing of the structural form of a heat ray absorption part. 4 is a graph showing the transmittance measurement results of the light control film used in Example 1.

  Hereinafter, the manufacturing method of the light control film which concerns on this invention is demonstrated in detail. The present invention is not limited to the following embodiments, and various modifications can be made within the scope of the gist thereof.

[Production Method of Light Control Film]
The method for producing the light control film 1 according to the present invention includes a step of preparing a heat ray selective absorption film 10 having a light transmissive portion 11 and a heat ray absorption portion 12 as shown in the flowchart of FIG. 20 or the step of preparing the ultraviolet absorbing film 30 and the step of bonding the heat ray selective absorbing film 10 and the ultraviolet absorbing layer 20 or the ultraviolet absorbing film 30 together. Specifically, a light-transmitting portion 11 formed of an ultraviolet curable resin and extending in the in-plane direction X is formed by extending the elongated portion 12A in the thickness direction Y, and an infrared absorbing material is provided in the shaping portion 12A. A step of preparing the heat ray selective absorption film 10 having the heat ray absorbing portion 12 containing the ultraviolet ray, a step of preparing the ultraviolet ray absorption layer 20 or the ultraviolet ray absorption film 30 containing the ultraviolet ray absorbing material, the heat ray selective absorption film 10 and the ultraviolet ray. Bonding the absorption layer 20 or the ultraviolet absorption film 30 to each other.

  Such a light control film 1 is bonded to an adherend plate 71 such as a window glass. For example, in the case of the externally attached light control films 1A to 1F and 1J attached to the outdoor side (outside) of the window glass, as shown in FIG. 2 to FIG. 7 and FIG. The surface 80 is provided with the ultraviolet absorbing layer 20 or the ultraviolet absorbing film 30, and the adhesive layer 40 (see FIGS. 2 to 7) is provided on the surface 70 of the light control film 1 on the adherend plate side. . The light control film 1 is used by bonding the adhesive layer 40 to an adherend plate 71 such as a window glass. On the other hand, in the case of the internally-attached light control films 1G to 1I attached to the indoor side (inside) of the window glass, as shown in FIGS. 8 to 10, the sunlight side surface of the light control film 1 (window glass side) The adhesive UV absorbing layer 26 is provided on the surface 80). The light control film 1 is used by bonding the ultraviolet absorbing layer 26 to an adherend plate 71 such as a window glass. A functional layer 50 such as a protective layer is provided on the indoor-side (inside) surface of the inner-attached light control film 1 as necessary.

<Various production forms>
Examples of the light control film 1 include various production forms as shown in FIGS. These light control films 1 (1 </ b> A to 1 </ b> J) can be roughly classified into an externally attached type and an internally attached type. “Outside pasting” refers to the case where the light control film 1A is bonded to the sunlight side (outdoor side) of the adherend plate 71 such as a window glass, and “inner pasting” refers to a window glass or the like. This is a case where the light control film is bonded to the inside (inside the room) of the adherend plate.

(Basic form of externally attached light control film)
As shown in FIGS. 2 to 7 and 11, the externally attached light control film 1 (1 </ b> A to 1 </ b> F, 1 </ b> J) prepares a heat ray selective absorption film 10 having a light transmissive portion 11 and a heat ray absorbing portion 12. (Refer to (A) of each figure) The ultraviolet absorption layer 20 or the ultraviolet absorption film 30 is prepared, and then the solar-side surface 80 and the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 of the heat ray selective absorption film 10 are prepared. It is manufactured by bonding (see (B) in each figure). In these externally attached light control films 1A to 1F, 1J, the adhesive layer 40 is provided on the surface 70 on the adherend plate side of the heat ray selective absorption film 10, and the adhesive layer 40 is an adherend plate 71 such as a window glass. Are pasted together. The heat ray selective absorption film 10 and the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 are bonded together by thermal transfer (FIGS. 2, 3 and 11), heat lamination (FIGS. 4 and 5), or dry lamination (FIGS. 6 and 6). 7).

  2 to 7 and FIG. 11, for example, as shown in FIG. 2, first, transfer including the ultraviolet absorbing layer 20 on the surface 80 on the sunlight side of the heat ray selective absorbing film 10. The film 20a is bonded (for example, refer to FIG. 2B), and then the adhesive layer 40 with the release film 41 is bonded to the surface 70 on the adherend plate side (for example, refer to FIG. 2C). The reverse may be possible. That is, first, the adhesive layer 40 with the release film 41 is bonded to the surface 70 of the heat ray selective absorption film 10 on the adherend plate side, and then the transfer film 20a including the ultraviolet absorption layer 20 on the surface 80 on the sunlight side. You may stick together.

(First manufacturing form)
FIG. 2 is an explanatory view showing an example of the first manufacturing mode of the light control film, and is a manufacturing example of the externally-attached light control film 1A manufactured by thermally transferring the ultraviolet absorption layer 20 to the heat ray selective absorption film 10. First, as shown in FIG. 2A, a heat ray selective absorption film 10 is prepared, and then, as shown in FIG. The ultraviolet absorption layer 20 is thermally transferred to the surface 80 on the sunlight side to be bonded through the heat fusion layer 20 ′.

  As shown in FIG. 2B, the ultraviolet absorption layer 20 is configured as a part of the transfer film 20a. The transfer film 20 a is a film in which a release film 21, an ultraviolet absorption layer 20, and a heat fusion layer 20 ′ are laminated in that order, and the heat fusion layer 20 ′ is the sunlight side of the heat ray selective absorption film 10. The film is brought into contact with the surface 80 and heated and bonded in this state for thermal transfer. The heating at this time can be performed by bringing a heating roll (not shown) into contact with the release film 21. The release film 21 may be peeled off during the process, or may be peeled off after being distributed and pasted to a window glass or the like (see FIG. 2D).

  The heat sealing layer 20 'may contain an ultraviolet absorbing material. By including the ultraviolet absorbing material also in the heat-fusible layer 20 ′, it is possible to further improve the UV resistance of the light control film 1 </ b> A. Further, as shown in FIG. 2C, it is preferable that the transfer film 40 a with the adhesive layer 40 is bonded to the surface 70 on the adherend plate side, and the adhesive layer 40 is transferred to the light control film 1. By transferring the adhesive layer 40, the release film 41 can be peeled off and easily attached to the adherend plate 71.

  FIG. 3 is an explanatory view of another example of the first manufacturing mode of the light control film, and is a manufacturing example of the externally attached light control film 1B manufactured by thermally transferring the ultraviolet absorbing layer 20 to the heat ray selective absorption film 10. . The difference from the manufacturing example shown in FIG. 2 is that, in FIG. 2, the ultraviolet absorbing layer 20 is bonded via the heat sealing layer 20 ′, but in FIG. 3, the ultraviolet absorbing layer 20 itself has a heat sealing property. The ultraviolet absorbing layer 20 is bonded to the heat ray selective absorbing film 10. That is, first, as shown in FIG. 3A, a heat ray selective absorption film 10 is prepared, and then, as shown in FIG. The ultraviolet absorbing layer 20 is thermally transferred to the sunlight-side surface 80 to which the 20 is bonded by its own heat-sealing performance.

  As shown in FIG. 3B, the ultraviolet absorbing layer 20 is configured as a part of the transfer film 20b. The transfer film 20b is a film in which the release film 21 and the ultraviolet absorbing layer 20 are laminated in this order, and the ultraviolet absorbing layer 20 having heat-fusibility is applied to the solar-side surface 80 of the heat ray selective absorbing film 10. In this state, heat transfer is performed by heating and bonding. In addition, since the transfer film 40a with the adhesion layer 40 bonded to the surface 70 by the side of a sticking board was demonstrated in FIG. 2, description is abbreviate | omitted here.

(Second production form)
FIG. 4 is an explanatory diagram showing an example of a second manufacturing mode of the light control film, which is a manufacturing example of the externally attached light control film 1C manufactured by heat laminating the ultraviolet ray absorbing film 30 on the heat ray selective absorption film 10. . First, as shown in FIG. 4 (A), the heat ray selective absorption film 10 is prepared, and then, as shown in FIG. 4 (B), the ultraviolet ray absorbing film 30 of both surfaces of the heat ray selective absorption film 10 is prepared. The ultraviolet absorbing film 30 is heat-laminated on the surface 80 on the sunlight side to be bonded through the heat fusion layer 30 ′.

  As shown in FIG. 4B, the ultraviolet absorbing film 30 is a heat laminate film composed of a base film 30b and an ultraviolet absorbing layer 20a. The ultraviolet absorbing film 30 is provided with a heat-sealing layer 30 ′. The heat-sealing layer 30 ′ is brought into contact with the sunlight-side surface 80 of the heat ray selective absorption film 10 and heated and bonded in this state. Heat seal. The heating at this time can be performed by contacting a heating roll (not shown).

  The heat fusion layer 30 ′ may contain an ultraviolet absorbing material. By including the ultraviolet absorbing material also in the heat-fusible layer 30 ′, the ultraviolet light deterioration resistance of the light control film 1 </ b> C can be further improved. In addition, since the transfer film 40a with the adhesion layer 40 bonded to the surface 70 by the side of a sticking board was demonstrated in FIG. 2, description is abbreviate | omitted here.

  FIG. 5 is an explanatory view of another example of the second manufacturing mode of the light control film, and is a manufacturing example of the externally attached light control film 1D manufactured by heat sealing the ultraviolet ray absorbing film 30 to the heat ray selective absorption film 10. is there. The difference from the manufacturing example shown in FIG. 3 is that, in FIG. 4, the ultraviolet absorbing film 30 is bonded through the heat-sealing layer 30 ′, but in FIG. 5, the base film 30b constituting the ultraviolet absorbing film 30 is It has heat-fusibility and is that the base film 30 b is bonded to the heat ray selective absorption film 10. That is, first, as shown in FIG. 4 (A), a heat ray selective absorption film 10 is prepared, and then, as shown in FIG. The ultraviolet absorbing film 30 is heat-sealed to the sunlight-side surface 80 to which 30 is bonded by its own heat-sealing performance. Other than these, the description is omitted here because it is the same as that described in FIG.

(3rd manufacturing form)
FIG. 6 is an explanatory view showing an example of a third manufacturing mode of the light control film, which is a manufacturing example of an externally attached light control film 1E manufactured by dry laminating the ultraviolet ray absorbing layer 20 on the heat ray selective absorption film 10. . First, as shown in FIG. 6 (A), a heat ray selective absorption film 10 is prepared. Next, as shown in FIG. 6 (B), the ultraviolet ray absorbing layer 20 is formed on both sides of the heat ray selective absorption film 10. The ultraviolet absorbing layer 20 is dry-laminated on the sunlight-side surface 80 to be bonded via the adhesive layer 25.

  The ultraviolet absorbing layer 20 is a dry laminate film configured with a base film 22 and an adhesive layer 25 as shown in FIG. That is, this dry laminate film is a film in which the ultraviolet absorbing layer 20, the base film 22, and the adhesive layer 25 are laminated in this order, and the adhesive layer 25 is attached to the solar-side surface 80 of the heat ray selective absorbing film 10. Adhere to and dry laminate.

  The adhesive layer 25 may contain an ultraviolet absorbing material. When the ultraviolet absorbing material is also included in the adhesive layer 25, the ultraviolet light deterioration resistance of the light control film 1E can be further improved. In addition, since the transfer film 40a with the adhesion layer 40 bonded to the surface 70 by the side of a sticking board was demonstrated in FIG. 2, description is abbreviate | omitted here.

  FIG. 7 is an explanatory view of another example of the third manufacturing mode of the light control film, which is a manufacturing example of the externally attached light control film 1F manufactured by dry-laminating the ultraviolet ray absorbing film 30 on the heat ray selective absorption film 10. is there. The difference from the manufacturing example shown in FIG. 6 is that, in FIG. 6, a dry laminate film composed of the ultraviolet absorbing layer 20, the base film 22 and the adhesive layer 25 is used, but in FIG. A dry laminate film composed of the adhesive layer 35 is used. Except for these, the description is omitted here because it is the same as that described in FIG.

(4th manufacturing form)
The fourth manufacturing mode is an example in which the ultraviolet absorbing layer 20 or the ultraviolet absorbing film 30 is formed of an electron beam curable resin in the externally attached light control film described in the first to third and fifth manufacturing modes. It is. An electron beam curable resin is convenient because it can be cured in a short time by irradiating an electron beam, and it can be cured with an electron beam instead of an ultraviolet ray. Can be cured without problems. The electron beam curable resin preferably contains a light stabilizing material that captures radicals.

(5th manufacturing form)
As shown in FIGS. 2 to 7, in the fifth manufacturing mode, in the externally attached light control film, among the both surfaces of the heat ray selective absorption film 10, the solar light side on which the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 is bonded. This is an example in which a pressure-sensitive adhesive layer 40 for attaching to an adherend plate such as a window glass is provided on the opposite surface 70 of the surface 80.

  The adhesive layer 40 constitutes a part of the transfer film 40 a together with the release film 41. The adhesive layer 40 of the transfer film 40 a is bonded to the surface 70 on the adherend plate side, and the adhesive layer 40 is transferred to the light control film 1. The light control film 1 to which the adhesive layer 40 has been transferred can be easily bonded by peeling off the release film 41 when bonded to the adherend plate 71.

(Basic form of in-applied light control film)
As shown in FIGS. 8 to 10, the inner-attached light control film 1 (1 </ b> G to 1 </ b> I) is provided with a heat ray selective absorption film 10 having a light transmissive portion 11 and a heat ray absorption portion 12 ( A) and the adhesive UV absorbing layer 26 are prepared, and then the solar radiation side surface 80 of the heat ray selective absorption film 10 and the UV absorbing layer 26 are bonded together (see (B) in each figure). Manufactured. In the internal sticking light control films 1G to 1I, the adhesive ultraviolet absorbing layer 26 is provided on the sunlight-side surface 80 of the heat ray selective absorption film 10 (the same as the surface 70 on the adherend plate side), The ultraviolet absorbing layer 26 is bonded to an adherend plate 71 such as a window glass. The adhesive UV absorbing layer 26 can be bonded to the heat ray selective absorption film 10 by thermal transfer, heat lamination (FIGS. 8 and 9) or dry lamination (FIG. 10).

  8 to 10, for example, as shown in FIG. 8, first, the transfer including the adhesive ultraviolet absorbing layer 26 on the sunlight-side surface 80 of the heat ray selective absorbing film 10 is performed. The films may be bonded together, and then applied to the indoor surface 90 (see, for example, FIG. 8C), and vice versa. That is, first, a functional layer 50 such as a protective layer is provided on the indoor surface 90 of the heat ray selective absorption film 10 as necessary, and then a transfer film including the adhesive ultraviolet absorbing layer 26 on the solar surface 80. 20c may be bonded together.

(6th manufacturing form)
FIG. 8 is an explanatory view showing an example of a sixth manufacturing mode of the light control film, and is an internal paste manufactured by heat transfer or heat laminating a transfer film 20c including an adhesive ultraviolet absorption layer 26 on the heat ray selective absorption film 10. This is a manufacturing example of the mold light control film 1G. First, as shown in FIG. 8 (A), a heat ray selective absorption film 10 is prepared, and then, as shown in FIG. 8 (B), among both surfaces of the heat ray selective absorption film 10, adhesive ultraviolet absorption. The transfer film 20c including the adhesive ultraviolet absorbing layer 26 is thermally transferred to the sunlight-side surface 80 on which the layer 26 is bonded (the same as the surface 70 on the adherend plate side) via the heat-sealing layer 20 ′. Or heat laminate. The thermal transfer and the heat lamination here are used in the same meaning in that the heat fusion layer 20 ′ is bonded to the heat ray selective absorption film 10 by heat.

  As shown in FIG. 8B, the adhesive ultraviolet absorbing layer 26 is configured as a part of the transfer film 20c. The transfer film 20c is a film in which a release film 21, an adhesive ultraviolet absorbing layer 26, a base film 22 and a heat fusion layer 20 ′ are laminated in that order. The selective absorption film 10 is brought into contact with the sunlight-side surface 80, heated and bonded in this state, and heat-transferred or heat-laminated. The heating at this time can be performed by bringing a heating roll (not shown) into contact with the release film 21. It is desirable to peel off the release film 21 immediately before being attached to a window glass or the like (see FIG. 8D).

  The heat sealing layer 20 ′ may contain an ultraviolet absorbing material as necessary. The base film 22 may also contain an ultraviolet absorbing material as necessary. By including the ultraviolet absorbing material in the heat-sealing layer 20 ′ and the base film 22, it is possible to further improve the UV resistance of the light control film 1 </ b> G. Moreover, the functional layer 50, such as a protective layer, can be provided on the indoor-side surface 90 of the heat ray selective absorption film 10 as necessary.

  FIG. 9 is an explanatory view of another example of the sixth manufacturing mode of the light control film, in which the transfer film 20d including the adhesive ultraviolet absorbing layer 26 is thermally transferred or heat laminated to the heat ray selective absorption film 10 and manufactured. It is an example of manufacture of the sticking type | mold light control film 1H. The difference from the manufacturing example shown in FIG. 8 is that, in FIG. 8, the transfer film 20c is bonded via the heat sealing layer 20 ′, but in FIG. 9, the base film 22 itself constituting the transfer film 20d has. The transfer film 20d is bonded to the heat ray selective absorption film 10 by heat fusion. That is, first, as shown in FIG. 9 (A), a heat ray selective absorption film 10 is prepared, and then, as shown in FIG. 9 (B), the transfer film 20d of both surfaces of the heat ray selective absorption film 10 is prepared. The transfer film 20d is heat-transferred or heat-laminated on the sunlight-side surface 80 where the substrate film 22 is bonded by the heat-sealing performance of the base film 22 itself constituting the transfer film 20d.

  As shown in FIG. 9B, the adhesive ultraviolet absorbing layer 26 is configured as a part of the transfer film 20d. The transfer film 20d is a film in which a release film 21, an adhesive UV absorbing layer 26, and a heat-fusible base film 22 are laminated in that order. The heat ray selective absorption film 10 is brought into contact with the surface 80 on the sunlight side, heated and bonded in this state, and heat transfer or heat lamination is performed. Other than that, the example is the same as the example described in FIG.

(7th manufacturing form)
FIG. 10 is an explanatory view showing an example of a seventh manufacturing mode of the light control film, in which the transfer type dry laminate film 20e including the adhesive ultraviolet absorbing layer 26 is dry laminated to the heat ray selective absorption film 10 and manufactured. It is an example of manufacture of the sticking type | mold light control film 1H. First, as shown in FIG. 10 (A), a heat ray selective absorption film 10 is prepared, and then, as shown in FIG. 10 (B), among both surfaces of the heat ray selective absorption film 10, adhesive ultraviolet absorption. The transfer-type dry laminate film 20e including the adhesive ultraviolet absorbing layer 26 is dried on the sunlight-side surface 80 on which the layer 26 is bonded (same as the surface 70 on the adherend plate side) via the adhesive layer 25. Laminate.

  As shown in FIG. 10B, the adhesive ultraviolet absorbing layer 26 is configured as a part of the transfer type dry laminate film 20e. The transfer type dry laminate film 20e is a film in which a release film 21, an adhesive ultraviolet absorbing layer 26, a base film 22 and an adhesive layer 25 are laminated in that order, and the adhesive layer 25 is used as a heat ray selective absorbing film. Then, the laminate is bonded to the surface 80 on the sunlight side 10 and dry laminated.

  The adhesive layer 25 may contain an ultraviolet absorbing material as necessary. The base film 22 may also contain an ultraviolet absorbing material as necessary. By including the ultraviolet absorbing material also in the adhesive layer 25 and the base film 22, it is possible to further improve the UV resistance of the light control film 1 </ b> I. Moreover, the functional layer 50, such as a protective layer, can be provided on the indoor-side surface 90 of the heat ray selective absorption film 10 as necessary. Other than these, the description is omitted here because it is the same as that described in FIG.

  As explained in each of the above-described production modes, according to the method for producing the light control film 1 according to the present invention, the light control film 1 having weather resistance such as ultraviolet ray resistance and having a heat ray selective absorption function is provided. Thus, it is possible to manufacture with good yield while suppressing waste of the raw material. In detail, since this manufacturing method has the process of bonding the heat ray selective absorption film 10 and the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 prepared in advance, the ultraviolet ray absorbing material is included in the heat ray selective absorption film as in the past. A step of directly applying or printing a resin material is not necessary. As a result, the waste of the raw material at the time of coating and printing can be eliminated, and the yield of the entire light control film can be improved. Moreover, since the ultraviolet ray absorbing layer 20 and the ultraviolet ray absorbing film 30 are provided on the heat ray selective absorption film 10 prepared in advance, the ultraviolet ray curing at the time of forming the light transmitting portion 11 constituting the heat ray selective absorption film 10 is hindered. There is nothing.

  The manufacturing method of the light control film 1 according to the present invention can obtain the light control film 1 of various forms described above, but is limited to these forms as long as the effects of the present invention described above can be obtained. is not. For example, although the light transmissive part 11 and the heat ray absorption part 12 which comprise the heat ray selective absorption film 10 are shown in each figure, it is not necessarily limited to such a form. Moreover, as long as the heat ray selective absorption film 10 and the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 are bonded together, other layers and films may be provided at arbitrary positions. For example, various functional layers such as a hard coat layer may be provided.

  Hereinafter, each process of the manufacturing method of the light control film 1 which concerns on this invention is demonstrated in detail, and the layer, film, etc. which are used at each process are demonstrated in detail.

<Preparation process of heat ray selective absorption film>
This preparation process is a process of preparing the heat ray selective absorption film 10 having the light transmissive part 11 and the heat ray absorbing part 12. The heat ray selective absorption film 10 film may be prepared and obtained by being already prepared, or may be prepared and prepared by the following method.

  The method for producing the heat ray selective absorption film 10 is not particularly limited, and various methods can be applied. As a typical example, the first step of providing an ultraviolet curable resin on the film substrate 13 and the ultraviolet curable resin are provided. And forming the shaped part into a concave shape extending in the thickness direction Y, and curing the ultraviolet curable resin by irradiating the shaped ultraviolet curable resin with the shaped part. A manufacturing method including the third step of forming the light-transmitting portion 11 and the fourth step of forming the heat ray absorbing portion 12 by filling the shaping portion with an infrared absorbing material can be given.

(Light transmissive part)
As shown in FIG. 13, the light transmissive part 11 is formed of an ultraviolet curable resin in the heat ray selective absorption film 10, and has a concave shape (wedge shape or rectangular shape) elongated in the thickness direction Y. The part 12A is a part arranged in parallel in the in-plane direction X. The light transmissive portion 11 does not include an infrared absorbing material. Therefore, the light transmissive portion 11 transmits visible light as well as infrared light. Even in the case of visible light incident on the light transmissive portion 11, the heat ray absorbing portion 12 in which the shaping portion includes an infrared ray absorbing material absorbs infrared rays. Therefore, the heat ray absorbing portion 12 shields at least infrared rays from being transmitted. The

  The light transmissive part 11 is formed of an ultraviolet curable resin. The ultraviolet curable resin is not particularly limited as long as it is a radically polymerizable resin that can be crosslinked by irradiation with ultraviolet rays, for example, an acrylate group, a vinyl group, an allyl group, an isopropenyl group, and the like. One type or two or more types selected from monomers (monomers), oligomers and prepolymers having a radically polymerizable unsaturated group can be mentioned. Examples of such oligomers and prepolymers include one or more selected from urethane acrylate, epoxy acrylate, polyester acrylate, polyether acrylate, polyethylene acrylate, polybutadiene acrylate, silicone acrylate, polyol acrylate, and the like.

  Examples of the monomer having a radical polymerizable unsaturated group include monofunctional monomers and polyfunctional monomers. Although it does not specifically limit as a monofunctional monomer, For example, vinyl monomers, such as N-vinyl pyrrolidone, N-vinyl caprolactone, vinyl imidazole, vinyl pyridine, styrene; Phenoxyethyl acrylate, lauryl acrylate, stearyl acrylate, butoxyethyl acrylate, Acrylate monomers such as methoxypolyethylene glycol acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, isooctyl acrylate, cyclohexyl acrylate, benzyl acrylate, N, N-dimethylacrylamide, N, N-dimethylaminopropyl acrylate, acryloylmorpholine; and acrylamide Derivatives. Polyfunctional monomers include pentaerythritol triacrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, polyethylene glycol diacrylate, tripropylene glycol diacrylate, polypropylene glycol diacrylate, polytetramethylene glycol diacrylate, butane Diol diacrylate, hexanediol diacrylate, nonanediol diacrylate, pentanediol diacrylate, neopentyl glycol diacrylate, dimethylol-tricyclodecane diacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and the like Modified ethylene oxide, B propylene oxide-modified products, and caprolactam modified products and the like. One type of monomer may be used, or two or more types may be mixed and used. Moreover, the oligomer and prepolymer which the above-mentioned monomer couple | bonded and produced | generated may be sufficient. These monomers, oligomers and prepolymers may be used singly or in combination, or may be used alone or in combination according to the required performance or industrial productivity. Two or more kinds can be used in appropriate combination.

  In the present invention, a diluent such as a monofunctional (meth) acrylate such as methyl (meth) acrylate is used together with the monomer, oligomer and prepolymer for the purpose of adjusting the viscosity. They can be used in combination as long as the purpose is not impaired. A monofunctional (meth) acrylate may be used individually by 1 type, may be used in combination of 2 or more type, and may use low-molecular-weight polyfunctional (meth) acrylate together. Moreover, as a diluent, the applicability | paintability of a resin composition can also be ensured using said monomer. “(Meth) acrylate” means “acrylate or methacrylate”.

  The ultraviolet curable resin contains a photopolymerization initiator. Although it does not specifically limit as a photoinitiator, For example, an acetophenone type compound, an acyl phosphine oxide type compound, etc. can be mentioned. Examples of acetophenone compounds include acetophenone, hydroxyacetophenone, aminoacetophenone, 1-hydroxycyclohexyl phenyl ketone, oligo [2-hydroxy-2-methyl-1- {4- (1-methylvinyl) phenyl} propanone], 2 -Methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1 and the like can be mentioned. Examples of the acyl phosphine oxide compound include bis (2,4,6-trimethylbenzoyl) -phenyl phosphine oxide. 1 type may be used for a photoinitiator and it may use 2 or more types together. Moreover, the compounding quantity of a photoinitiator exists in the range of 0.1 mass% or more and 5 mass% or less with respect to the whole quantity of the ultraviolet curable resin composition for forming the light transmissive part 11. Is preferred. In addition, as a quantification method of a photoinitiator, it can obtain | require by the gas chromatography mass spectrometry, for example.

  As shown in FIG. 13, the light-transmitting portion 11 includes concave-shaped (wedge shape or rectangular shape) shaped portions 12 </ b> A extending in the thickness direction Y in parallel in the in-plane direction X. The shaped portion 12A is formed by shaping a predetermined shape with a mold before curing the ultraviolet curable resin constituting the light transmissive portion 11, and irradiating with ultraviolet rays in the shaped state. The mold is usually a roll-shaped or plate-shaped mold having a shaping shape on the surface for shaping a concave shape (wedge shape or rectangular shape). The ultraviolet rays are irradiated from the surface opposite to the surface to be shaped, and specifically, the ultraviolet rays are irradiated from the film substrate 13 side.

(Heat ray absorption part)
The heat ray absorbing portion 12 is formed by filling the above-described shaped portion 12A with an infrared absorbing material. As shown in FIG. 12, the heat-absorbing part 12 formed by filling the shaping part 12A with an infrared absorbing material suppresses the intake of infrared rays into the sunlight 81A into the room in the summer, and the room becomes too hot. The shape of the solar cell 81B is not particularly limited as long as it can act to increase the intake of infrared rays in the sunlight 81B into the room and warm the room in winter. Usually, a concave shape elongated in the thickness direction Y, specifically a wedge shape or a rectangular shape can be mentioned. The filling material to the heat ray absorption part 12 should just be a resin composition containing an infrared rays absorption material at least, and can specifically mention the resin composition containing a curable resin and an infrared rays absorption material at least.

(Curable resin)
Preferable examples of the curable resin include a thermosetting resin and an ionizing radiation curable resin.

  Thermosetting resins include epoxy resin, phenol resin, urea resin, unsaturated polyester resin, melamine resin, alkyd resin, polyimide resin, silicone resin, hydroxyl functional acrylic resin, carboxyl functional acrylic resin, amide functional copolymer A coalescence, a urethane resin, etc. can be mentioned.

  As an aspect of cross-linking curing of these resins, for example, epoxy resin can promote cross-linking curing by reaction with amine, acid catalyst, carboxylic acid, acid anhydride, hydroxyl group, dicyandiamide or ketimine; Crosslinking cure can be promoted by reaction of aldehyde with excess aldehyde; urea resin can promote crosslinking cure by polycondensation reaction under alkaline or acidic conditions; unsaturated polyester resin can co-condensate maleic anhydride with diol Crosslinking and curing can be promoted by reaction; melamine resin can promote crosslinking and curing by heat polycondensation reaction of methylolmelamine; alkyd resin can be crosslinked and cured by reaction by air oxidation of unsaturated groups introduced into side chains and the like. Can be promoted; polyimide resins can be reacted by reaction in the presence of acids or weak alkali catalysts or Crosslinking and curing can be promoted by a reaction with a product (in the case of a two-component type); the silicone resin can promote crosslinking and curing by a condensation reaction in the presence of a silanol group acid catalyst; Crosslinking and curing can be promoted by reaction with its own amino resin (in the case of 1-component type); carboxyl functional acrylic resin can promote crosslinking and curing by reaction with carboxylic acid such as acrylic acid or methacrylic acid and an epoxy compound; Amide functional copolymers can promote cross-linking and curing by reaction with hydroxyl groups or self-condensation reactions; urethane resins are hydroxyl group-containing resins such as polyester resins, polyether resins, acrylic resins and isocyanate compounds or modified products thereof Crosslinking hardening can be accelerated | stimulated by reaction with. A cross-linking agent or a curing agent utilizing these reactions is usually used.

  As the ionizing radiation curable resin, a transparent resin having a predetermined refractive index, such as an ultraviolet curable resin or an electron beam curable resin having an ionizing radiation curable function, is used. From the viewpoint of curability, an electron beam curable resin is preferably used, and an electron beam curable resin is particularly preferable from the viewpoint that a solvent or the like need not be used.

  Specifically, one type or two or more types selected from various polymerizable oligomers and prepolymers used as a raw material for an ionizing radiation curable resin can be used. Examples of polymerizable oligomers and prepolymers include oligomers or prepolymers having radically polymerizable unsaturated groups in the molecule. For example, epoxy (meth) acrylates, urethane (meth) acrylates, polyether urethanes ( Preferred examples include (meth) acrylate-based, caprolactone urethane (meth) acrylate-based, polyester (meth) acrylate-based, and polyether (meth) acrylate-based oligomers or prepolymers. Here, “(meth) acrylate” means “acrylate or methacrylate”.

  In addition to monofunctional urethane (meth) acrylate, monofunctional (meth) acrylates such as methyl (meth) acrylate can be used. The monofunctional (meth) acrylate may be used in combination as a diluent or the like for adjusting the viscosity within a range that does not impair the object of the present invention. A monofunctional (meth) acrylate may be used individually by 1 type, may be used in combination of 2 or more type, and may use low-molecular-weight polyfunctional (meth) acrylate together.

(Infrared absorbing material)
The infrared absorbing material is not particularly limited as long as it has an effect of absorbing heat rays (infrared rays) of sunlight, and any of an inorganic infrared absorbing material and an organic infrared absorbing material can be used.

  Examples of the inorganic infrared absorbing material include metal oxide nanoparticles. Specifically, one or more kinds of nanoparticles selected from the group consisting of titanium oxide, zinc oxide, indium oxide, tin-doped indium oxide (ITO), tin oxide, antimony-doped tin oxide (ATO), and zinc sulfide are used. Can be mentioned. Among these, nanoparticles of antimony-doped tin oxide (ATO) or tin-doped indium oxide (ITO) are preferable. From the viewpoint of suppressing haze, the average particle size of the nanoparticles, particularly ATO or ITO nanoparticles, is preferably in the range of 1 nm to 300 nm, and more preferably in the range of 1 nm to 100 nm.

  From the viewpoint of efficiently absorbing infrared rays, the metal oxide nanoparticles are preferably contained in the curable resin composition within a range of 0.2% by mass or more and 20% by mass or less. The content is more preferably in the range of 10% by mass or more and particularly preferably in the range of 1% by mass or more and 7.5% by mass or less. Moreover, when using ATO or ITO nanoparticles, it is preferable to contain them in the range of 0.5% by mass or more and 7.5% by mass or less from the viewpoint of transparency. It is more preferable to contain within the following ranges.

Other inorganic infrared absorbing materials are preferably tungsten oxides and more preferably composite tungsten oxides from the viewpoints of weather resistance, near-infrared absorbing performance, visible light transmittance, and the like. Examples of the composite tungsten oxide include a compound represented by M _m WO _n . In this formula, M element is H, He, alkali metal, alkaline earth metal, rare earth element, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be Represents one or more elements selected from Hf, Os, Bi, and I, and m and n satisfy 0.001 ≦ m ≦ 1.0 and 2.2 ≦ n ≦ 3.0 Is a number.

Since composite tungsten oxide has excellent durability when it has a hexagonal, tetragonal or cubic crystal structure, it may contain one or more crystal structures selected from these hexagonal, tetragonal and cubic crystals. preferable. Of these, hexagonal crystals are particularly preferred because they have the least absorption in the visible light region. For example, as a composite tungsten oxide having a hexagonal crystal structure, one or two kinds selected from Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe and Sn are preferable as the M element. The above elements can be mentioned. In this case, the abundance m of the M element is preferably in the range of 0.001 or more and 1.0 or less, preferably about 0.33. This 0.33 is a value theoretically calculated from the hexagonal crystal structure, and a preferable infrared absorption characteristic can be obtained with the addition amount before and after this. On the other hand, the abundance n of oxygen is preferably in the range of 2.2 to 3.0. Representative examples include Cs _0.33 WO ₃ , Rb _0.33 WO ₃ , K _0.33 WO ₃ , Ba _0.33 WO _{3 and the} like. If m and n are within the above ranges, useful near infrared absorption characteristics can be obtained.

As the composite tungsten oxide, a cesium-containing composite tungsten oxide is preferable from the viewpoints of infrared absorption characteristics and weather resistance. The cesium-containing composite tungsten oxide is represented by Cs _{0.2 to 0.4} WO _2.5 to _3.0 . This composite tungsten oxide has much better weather resistance and higher visible light transmittance than the fluorine-containing phthalocyanine compound, which is known to be particularly excellent in weather resistance among organic infrared absorbing materials. The composite tungsten oxide is preferably used in the form of fine particles, and the average particle size is preferably 800 nm or less, and more preferably 100 nm or less, from the viewpoint of dispersibility and optical characteristics.

Other inorganic infrared absorbing materials include LaB ₆ , CeB ₆ , PrB ₆ , NdB ₆ , GdB ₆ , TbB ₆ , DyB ₆ , HoB ₆ , YB ₆ , SmB ₆ , EuB ₆ , ErB ₆ , TmB ₆ , YbB. ₆ , hexaboride such as LuB ₆ , SrB ₆ , CaB ₆ and (La, Ce) B ₆ .

  On the other hand, as an organic infrared absorbing material, for example, a cyanine compound; a squarylium compound; a thiol nickel complex compound; a naphthalocyanine compound; a phthalocyanine compound; a triallylmethane compound; a naphthoquinone compound; N, N, N ′, N′-tetrakis (p-di-n-butylaminophenyl) -p-phenylenediaminium perchlorate, phenylenediaminium chloride, phenylenediaminium hexafluoroantimonate Amino compounds such as fluorinated boronate of phenylenedianium, fluorine salt of phenylenediaminium, perchlorate of phenylenediaminium; reaction of copper compound with bisthiourea compound, reaction of phosphorus compound with copper compound, Between phosphate ester compounds and copper compounds Response, copper phosphate compound obtained by; and the like. Of these, thiol nickel complex compounds (JP-A-9-230134 etc.) and phthalocyanine compounds are preferred. In particular, the fluorine-containing phthalocyanine compound disclosed in Japanese Patent Application Laid-Open No. 2000-26748 has high visible light transmittance among organic infrared absorbing materials, and has characteristics such as heat resistance, light resistance, and weather resistance. It is preferable when used in combination with an inorganic system.

(Additive)
The curable resin composition used for the heat ray absorbing portion 12 can contain various additives as long as the performance is not impaired. Examples of the additive include a polymerization inhibitor, a crosslinking agent, an antistatic agent, an adhesion improver, an antioxidant, a leveling agent, a thixotropic agent, a coupling agent, a plasticizer, an antifoaming agent, and a filler. Can be mentioned. When an ultraviolet curable resin is used as the ionizing radiation curable resin, the photopolymerization initiator is added within a range of 0.1 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the curable resin. It is preferable to do. In addition, what is conventionally used can be used similarly for the initiator for photopolymerization.

(Weather resistance improving material)
In order to impart a weather resistance function to the light transmitting portion 11 and the heat ray absorbing portion 12 constituting the heat ray selective absorption film 10, a weather resistance improving material such as an ultraviolet absorbing material (UVA) or a light stabilizing material is provided as necessary. It can be included. By including a weather resistance improving agent, it is possible to prevent a decrease in transmittance and discoloration caused by sunlight, and to maintain performance over a longer period. Note that it is difficult to contain the ultraviolet absorbing material in the ultraviolet curable resin.

  The ultraviolet absorbing material may be inorganic or organic. Preferable examples of the inorganic ultraviolet absorbing material include titanium oxide, cerium oxide, and zinc oxide having an average particle diameter of about 5 nm to about 120 nm. Preferred examples of the organic ultraviolet absorbing material include benzotriazole, triazine, benzophenone, salicylate, and acrylonitrile. Of these, triazines are preferred because they have a high ultraviolet-absorbing ability and are not easily degraded by high energy such as ultraviolet rays.

  Preferable examples of the light stabilizing material include hindered amine light stabilizing materials. In addition, as the ultraviolet absorbing material or the light stabilizing material, an ultraviolet absorbing material or a light stabilizing material having a reactive group in the molecule can be used. Examples of the light stabilizing material include 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1, 2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, 2,4-bis [N-butyl-N- (1 -Cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) amino] -6- (2-hydroxyethylamine) -1,3,5-triazine) and the like.

(Film substrate)
The shaping portion 14 composed of the light transmitting portion 11 and the heat ray absorbing portion 12 described above is provided on the film substrate 13. That is, a resin composition for forming the light-transmitting portion 11 is applied on the film substrate 13, and the applied resin composition is cured while shaping, and the infrared absorbing material is formed in the cured wedge-shaped concave portion. Etc., the heat ray selective absorption film 10 is obtained.

  As the film substrate 13, since transparency and strength as a film for window pasting are required, it is preferable to use a film of polyethylene terephthalate (PET) or polycarbonate (PC). The film base 13 may be colored as necessary, or other materials may be formed. Further, an antioxidant, an ultraviolet absorbing material and the like may be included. The thickness of the film substrate 13 is preferably in the range of 50 μm or more and 100 μm or less. The film base 13 preferably has a total light transmittance of 80% or more.

  The surface of the film base 13 is subjected to a surface treatment for improving adhesion with the adhesive layer 50 (see FIGS. 2 to 7) or the functional layer 50 (see FIGS. 8 to 10). preferable. Examples of the surface treatment include an oxidation method and an uneven method.

  Examples of the oxidation method include corona discharge treatment, chromic acid treatment (wet), flame treatment, hot air treatment, ozone ultraviolet irradiation treatment, and the like. Examples of the uneven method include a sand blast method and a solvent treatment method. These surface treatments are selected according to the type of the film substrate 13, but in general, the corona discharge treatment method is preferably used from the viewpoints of effects and operability.

  Moreover, you may apply an easily bonding coat process as chemical surface treatment. The easy adhesion coating treatment is a treatment for improving the adhesiveness by coating a resin layer or the like on the film substrate 13, and for example, there is a method of providing a polyester resin layer. The thickness of the resin layer is usually in the range of about 0.005 μm to 0.2 μm, and preferably in the range of 0.01 μm to 0.1 μm. The polyester resin layer is preferably crosslinked, and examples of the crosslinking agent include melamine crosslinking agents and epoxy crosslinking agents.

(Function of heat ray absorption part)
In this way, the heat ray selective absorption film 10 composed of at least the light transmitting portion 11 and the heat ray absorbing portion 12 is obtained. FIG. 13 is a detailed explanatory diagram of the structure of the heat ray absorbing portion. In FIG. 13, the angle between the traveling direction of the sunlight 81 and the horizontal direction is θ, the refraction angle when the sunlight 81 is incident on the light transmissive portion 11 of the light control film 1 is θ ₀₁ , and the light control film The height, pitch, and base width (width of the bottom surface 12S on the film surface 10S side of the shaped portion 12A) of each wedge-shaped shaped portion 12A are Ta, Pa, and Wa, respectively. At this time, assuming that the refractive index of air is n ₁ and the refractive index of the light transmitting portion 11 is n ₂ , n ₁ sin θ = n ₂ sin θ ₀₁ is obtained from Snell's law. When θa = tan ⁻¹ [{Pa− (Wa / 2)} / Ta] and θa is smaller than θ ₀₁ , the refracted light incident on all the light transmissive portions 11 is The heat ray absorbing portion 12 is hit and shielded. Further, when θa is larger than θ ₀₁ , sunlight 81 is taken into the room corresponding to the magnitude of θ ₀₁ . Thus, in response to the magnitude relationship between θa and theta _01, uptake into the indoor sunlight 81 is controlled.

Therefore, the light control film 1 is arranged on the window glass provided on the south side wall surface of the building, the south-middle altitude of the summer solstice is θ ₁ , the south-middle altitude of the autumn day is θ ₂ , and the light transmitting portion 11 has the sun. If the angle of refraction when light 81 is incident, respectively theta _10, and a theta _20, Snell's _{law, n 1 sinθ 1 = n 2} sinθ 10, n 1 sinθ 2 = n 2 sinθ 20, next, theta ₂₀ ≦ tan ⁻¹ [{Pa− (Wa / 2)} / Ta] <θ ₁₀ . As a result, when no reflection occurs at the boundary surface between the light transmissive portion 11 and the heat ray absorbing portion 12, sunlight in the summer solstice can be blocked by 100%, and a period other than the period from the spring equinox to the summer solstice to the autumn equinox Then, sunlight can be collected indoors in an amount corresponding to the angle θ of incidence of sunlight on the light control film 1.

  At this time, if the refractive index of the light transmissive part 11 and the heat ray absorbing part 12 is selected, reflection of the boundary surface between the light transmissive part 11 and the heat ray absorbing part 12 can be suppressed. As a result, it is possible to substantially block the summer solstice sunlight 100%. In the summer solstice, the sunlight 81 incident on the light transmissive portion 11 reduces the reflection at the boundary surface between the light transmissive portion 11 and the heat ray absorbing portion 12, so that the light transmissive portion 11 is refracted. It is preferable that the rate is the same as the refractive index of the heat ray absorbing portion 12 or lower than the refractive index of the heat ray absorbing portion 12.

<Preparation process of UV absorbing layer or UV absorbing film>
The ultraviolet absorbing layer 20 or the ultraviolet absorbing film 30 is prepared as a layer or film used in the first to eighth manufacturing modes described above. The ultraviolet absorbing layer 20 is a layer formed of a resin composition containing an ultraviolet absorbing material, and the ultraviolet absorbing film 30 is a film formed of a resin composition containing an ultraviolet absorbing material. The prepared ultraviolet absorption layer 20 and ultraviolet absorption film 30 are bonded to the heat ray selective absorption film 10. The bonding is performed by various means described later, for example, thermal transfer, heat lamination, or dry lamination. The ultraviolet absorbing layer 20 and the ultraviolet absorbing film 30 have a heat sealing property that enables such a bonding means, or have a heat sealing layer, an adhesive layer, and the like.

  As shown in FIG. 2, the ultraviolet absorbing layer 20 used in the first manufacturing mode is a part of a transfer film 20a in which a release film 21, an ultraviolet absorbing layer 20, and a heat fusion layer 20 ′ are laminated in that order. As shown in FIG. 3, a release film 21 and a heat-sealable ultraviolet absorbing layer 20 are provided as part of a transfer film 20b laminated in that order.

  The ultraviolet absorption film 30 used in the second production form is a heat laminate film in which an ultraviolet absorption layer 30a, a base film 30b, and a heat fusion layer 30 ′ are laminated in that order, as shown in FIG. As shown in FIG. 5, it is a heat laminate film in which an ultraviolet absorbing layer 30a and a base film 30b having heat fusion properties are laminated in that order.

  As shown in FIG. 6, the ultraviolet absorbing layer 20 used in the third production form is provided as a part of a dry laminate film in which the ultraviolet absorbing layer 20, the base film 22, and the adhesive layer 25 are laminated in that order. Or as shown in FIG. 7, the ultraviolet absorption film 30 and the adhesion layer 35 are provided as a part of dry laminate film laminated | stacked in that order.

  As shown in FIG. 8, the adhesive ultraviolet absorbing layer 26 used in the sixth production form is composed of a release film 21, an adhesive ultraviolet absorbing layer 26, a base film 22 and a heat fusion layer 20 ′ in that order. As shown in FIG. 9, the release film 21, the adhesive ultraviolet absorbing layer 26, and the heat-fusible base film 22 are arranged in that order. It is provided as a part of the laminated transfer film 20d.

  As shown in FIG. 10, the adhesive ultraviolet absorbing layer 26 used in the seventh manufacturing mode is formed by laminating a release film 21, an adhesive ultraviolet absorbing layer 26, a base film 22, and an adhesive layer 25 in that order. It is provided as a part of the transfer type dry laminate film 20e.

  Each of these constituent materials will be described.

(UV absorbing layer, UV absorbing film)
One of the ultraviolet absorbing layers 20 and 30a and the ultraviolet absorbing film 30 is used in each manufacturing form. The ultraviolet absorbing layers 20 and 30a and the ultraviolet absorbing film 30 may be selected from the same resin materials as those other than the ultraviolet curable resin in the explanation column of the curable resin constituting the heat ray absorbing portion 12 described above. it can. For example, a thermosetting resin or an electron beam curable resin can be used. Since such a resin material is the same as described above, its description is omitted here. When the ultraviolet absorbing layer 20 is formed, it is desirable to prepare such resin materials so that they can be easily applied on the base film. When the ultraviolet absorbing film 30 is formed, these resin materials are formed into a film. It is desirable to prepare it so that it can be easily extruded. In addition, since the ultraviolet absorption layer 20 and the ultraviolet absorption film 30 contain an ultraviolet absorbing material, it is not suitable to use an ultraviolet curable resin as a main material because sufficient curing cannot be realized.

  As the ultraviolet absorbing material, the same materials as those described in the description of the weather resistance improving material described above can be used, and they may be inorganic or organic. Since such an ultraviolet absorbing material is the same as described above, the description thereof is omitted here. The content of the ultraviolet absorbing material in the resin material can be arbitrarily set depending on how much the ultraviolet absorbing ability of the ultraviolet absorbing layer 20 and the ultraviolet absorbing film 30 is set, for example, the ultraviolet absorbing layer 20 or the ultraviolet absorbing layer. It can be in the range of 0.1 mass% or more and 30 mass% or less with respect to the total mass of the absorption film 30.

(Heat-fusion layer)
The heat fusion layers 20 ′ and 30 ′ are layers for enabling thermal transfer or heat lamination of the ultraviolet absorbing layer or the ultraviolet absorbing film, and are applied in the production form shown in FIGS. .

  The heat sealing layers 20 ′ and 30 ′ are formed of a resin material including a thermoplastic resin. The thermoplastic resin is not particularly limited as long as it is a resin that melts at a desired temperature. Among them, the melting point of the thermoplastic resin is preferably in the range of 50 ° C. or higher and 130 ° C. or lower, more preferably in the range of 60 ° C. or higher and 120 ° C. or lower, and still more preferably in the range of 60 ° C. or higher and 100 ° C. or lower. Within range. When the melting point exceeds the upper limit of the above range, other constituent materials may be deteriorated during heat fusion. When the melting point is less than the lower limit of the above range, the heat control film 1 is heated when used. There is a possibility that the fused layer may be softened.

  Examples of the thermoplastic resin include polyolefins such as polyethylene, polypropylene, polyisobutylene, polystyrene, and ethylene-propylene rubber, cellulose derivatives such as ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethyl cellulose, and cellulose triacetate. , A copolymer of poly (meth) acrylic acid and its ester, polyvinyl acetal such as polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polyacetal, polyamide, polyimide, nylon, polyester resin, urethane resin, epoxy resin, silicone resin, A fluororesin etc. can be mentioned. Among these, polyvinyl acetal, polyolefin, ethylene-vinyl acetate copolymer, urethane resin, epoxy resin, silane-modified resin, and acid-modified resin are preferable from the viewpoint of adhesiveness and light transmittance. In particular, polyvinyl butyral and ethylene-vinyl acetate copolymer are preferable. The ethylene-vinyl acetate copolymer is particularly excellent in adhesiveness, and the polyvinyl butyral is particularly excellent in transparency.

  The heat fusion layers 20 ′ and 30 ′ may contain additives such as a light stabilizer, an ultraviolet absorber, a heat stabilizer, and an antioxidant. By containing these additives, stable mechanical strength over a long period of time, prevention of yellowing, prevention of cracking, and excellent processability can be obtained. The heat-fusible layers 20 ′ and 30 ′ may further contain a crosslinking agent, a dispersant, a leveling agent, a plasticizer, an antifoaming agent, and the like. When the heat fusion layers 20 'and 30' contain a crosslinking agent, the heat resistance after heat fusion can be improved. As the crosslinking agent, for example, a silane coupling agent can be used.

  The ultraviolet-absorbing layer 20 having heat-fusibility is formed of a resin material containing the thermoplastic resin described in the above-mentioned heat-fusible layer, and further contains the aforementioned ultraviolet-absorbing material in the resin material. The content of the ultraviolet absorbing material in the resin material can be arbitrarily set depending on how much the ultraviolet absorbing ability of the ultraviolet absorbing layer 20 is to be set. It can be in the range of 1 mass% or more and 30 mass% or less.

  In order to enhance the thermal transfer or heat-laminated adhesion of the ultraviolet absorbing layer or ultraviolet absorbing film, it is preferable to provide a primer layer (not shown, also referred to as an adhesive layer) on the surface of the heat ray selective absorbing film 10. Examples of the resin material for forming the primer layer include heat fusion of acrylic resin, vinyl chloride-vinyl acetate copolymer, polyamide resin, polyester resin, chlorinated polypropylene, chlorinated rubber, urethane resin, epoxy resin, styrene resin, and the like. Preferable examples are adhesive resins. The primer layer is composed of one or more of these resins, and an acrylic resin alone is particularly preferred from the viewpoint of improving weather resistance.

  The thickness of the primer layer is usually in the range of 2 μm to 25 μm, and preferably in the range of 3 μm to 20 μm. If the thickness is 2 μm or more, sufficient adhesiveness can be obtained, and if the thickness is 25 μm or less, it is economically preferable.

(Release film)
Although the release film 21 is not illustrated, the release film 21 includes a base film and a release layer. As the base film, the same base film as that used in conventional transfer films can be used, and the base film is not particularly limited. Specific examples of the base film include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polyphenylene sulfide, polyetherketone and other highly heat-resistant polyesters; polypropylene, polycarbonate, cellulose acetate, polyethylene derivatives, polyvinyl chloride, poly Examples thereof include plastic films such as vinylidene chloride, polystyrene, polyamide, polyimide, polymethylpentene, and ionomer, and laminates thereof. The plastic film may be stretched or unstretched. The thickness of the base film can be appropriately selected in consideration of strength, heat resistance, etc., but is usually about 1 μm or more and 100 μm or less.

  The release layer is provided on the side of the base film on which the ultraviolet absorbing layer 20 is laminated. That is, the release layer is provided between the base film and the ultraviolet absorption layer 20. By providing the release layer, the ultraviolet absorbing layer 20 can be easily peeled from the base film. The release layer is not peeled off from the base film during thermal transfer or heating of the heat laminate, and is not transferred to the light control film 1. Therefore, the surface of the release layer that is in contact with the ultraviolet absorbing layer 20 is a release surface (release surface). Examples of the constituent material of the release layer include various waxes such as silicone wax, silicone resin, fluorine resin, acrylic resin, polyurethane resin, polyvinyl pyrrolidone resin, polyvinyl alcohol resin, and polyvinyl acetal resin. The release layer is formed with a thickness that allows the release layer forming coating solution to exhibit its function by a conventionally known method such as gravure direct coating, gravure reverse coating, knife coating, air coating, roll coating, etc. Can be provided.

  A heat resistant slipping layer may be provided on the surface of the release film 21. This heat-resistant slip layer functions as a layer for heat transfer or heat roll for heat lamination. Such a release film 21 is a film mainly applied in the case of thermal transfer. However, the release film 21 may function as a surface protective layer until the light control film 1 is bonded to an adherend plate 71 such as a window glass. Therefore, it can be preferably applied.

(Base film)
The base film 22, 30b is a film having heat-fusibility applied by thermal transfer or heat lamination, and is a film on which the ultraviolet absorbing layers 20, 30a are provided. As the material for forming the base films 22 and 30b having heat-fusible properties, the same resin material as that of the base film constituting the above-described release film can be applied. When it is formed of a resin material containing a thermoplastic resin, it can be applied as it is. On the other hand, even if the forming material of the base films 22 and 30b having heat-fusibility is the same resin material as the base film constituting the above-described release film, the resin material is the above-mentioned heat-sealing layer When it is not formed of the resin material containing the thermoplastic resin described in the above, it cannot be applied as it is. Therefore, it is necessary to contain the thermoplastic resin described in the above-described heat-fusible layer.

  The base film 22, 30b may contain the above-described ultraviolet absorbing material as necessary. Moreover, a primer layer (with the above-described primer layer and the above-described primer layer) is provided on the surface of the base films 22 and 30b on the side where the ultraviolet absorption layers 20 and 30a are provided. The same may be provided.

(Adhesive layer)
The adhesive layers 25 and 35 are layers applied when the heat ray selective absorption film 10 and the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 are bonded together by dry lamination. The constituent material of the adhesive layers 25 and 35 is not particularly limited, and for example, an acrylic, urethane, silicone, rubber, or other adhesive can be appropriately selected and used. Of these, acrylic pressure-sensitive adhesives mainly composed of a polymer or copolymer of a no-acrylic monomer such as acrylic acid ester or methacrylic acid ester are preferred from the viewpoint of weather resistance, etc., and particularly n-butyl acrylate and 2-ethylhexyl. Preferred are acrylates and the like. Moreover, a crosslinking agent can also be added and specifically, an isocyanate type, metal chelate, an epoxy type, and a melamine type crosslinking agent are mentioned.

The application amount of the pressure-sensitive adhesive is preferably in the range of 10 g / m ² or more and 30 g / m ² or less by dry weight. If the coating amount is 10 g / m ² or more, sufficient adhesive strength is obtained, and if it is 30 g / m ² or less, the pressure-sensitive adhesive does not protrude during printing. As a method for applying the pressure-sensitive adhesive, a method of preparing and applying a coating solution in which the above pressure-sensitive adhesive is diluted with a solvent (ethyl acetate, toluene, etc.) to a solid content of 20% by mass or more and 60% by mass or less can be applied. The pressure-sensitive adhesive coating device is not particularly limited as long as it is a known coating device, and examples thereof include a knife coater, a comma coater, a gravure coater, and a roll coater.

  The adhesive ultraviolet absorbing layer 26 is a layer to which the ultraviolet absorbing layer is applied as an adhesive layer. Therefore, the above-mentioned pressure-sensitive adhesive can be used as a main component, and the above-described ultraviolet absorbing material can be contained therein. The blending amount of the ultraviolet absorbing material is preferably set in consideration of the balance between adhesiveness and ultraviolet absorbing ability.

<Lamination process>
The ultraviolet absorption layer 20 or the ultraviolet absorption film 30 is bonded to the heat ray selective absorption film 10. The laminating is performed by laminating means such as thermal transfer, heat laminating or dry laminating. Thermal transfer and heat lamination can be performed by a heating and pressing means using a heat roll, a thermal head, a heating flat plate or the like. Moreover, dry lamination can be performed by pressing means such as a roll or a flat plate that is not heated.

<Others>
The light control film 1 can be manufactured by bonding the heat ray selective absorption film 10 and the ultraviolet absorption layer 20 or the ultraviolet absorption film 30 as described above. In such a light control film 1, in addition to the above-described layers, various functional layers and the like may be laminated on the surface or inside of the light control film 1. Examples of such a layer include functional layers such as a surface protective layer and a hard coat layer.

(Surface protective layer)
As shown in FIGS. 8 to 10, the surface protective layer 50 is a layer that is provided on the surface of the light control film 1 and imparts hard coat properties such as weather resistance and scratch resistance to the light control film 1. The surface protective layer 50 is formed by crosslinking and curing a liquid ultraviolet curable resin composition containing an ultraviolet curable resin and a photopolymerization initiator. As the ultraviolet curable resin, it can be appropriately selected from polymerizable oligomers or prepolymers conventionally used as ultraviolet curable resins, and in particular, polyfunctional polymerizable oligomers or prepolymers can be used. It is done. Examples of the polymerizable oligomer or prepolymer include oligomers and prepolymers having radically polymerizable unsaturated groups in the molecule, such as epoxy (meth) acrylate, urethane (meth) acrylate, polyether urethane (meth) acrylate, and caprolactone. Preferred examples include urethane (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate oligomers and prepolymers. Here, “(meth) acrylate” means “acrylate or methacrylate”.

  The ultraviolet curable resin composition forming the surface protective layer 50 may further contain a weather resistance improver and a scratch resistant filler in order to further improve the hard coat properties and weather resistance. Moreover, various additives can be contained in the ultraviolet curable resin composition for surface protective layers in the range which does not inhibit the performance. Examples of various additives include polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifoaming agents, fillers, and solvents. Etc.

  Such a surface protective layer 50 can be provided on the heat ray selective absorption film 10 constituting the light control film 1 by various means. For example, it can be provided by thermal transfer, heat lamination, dry lamination, or a coating method. When the surface protective layer 50 is provided by thermal transfer, heat lamination, or dry laminate, the above-described heat sealing layer, adhesive layer, or the like is provided as necessary, and when the surface protective layer 50 is provided by a coating method, heat ray selection is performed. You may apply and form beforehand on the film base material 13 which comprises the absorption film 10. FIG.

(Adhesive layer)
Bonding to the adherend plate 71 is performed by the adhesive layers 26 and 40 provided on the light control film 1. The adhesive layer 40 is provided on the surface 70 on the adherend plate side of the externally attached light control film 1 shown in FIGS. On the other hand, the pressure-sensitive adhesive layer 26 also serves as an ultraviolet absorbing layer, and is provided on the surface 70 on the adherend plate side (sunlight side) of the internally-adhered light control film 1 shown in FIGS.

  The adhesive layer 40 can be formed of the same resin material as the adhesive layer 26 described above except that it does not contain an ultraviolet absorbing material. Further, the coating amount can be made similar, and the same coating method can be applied.

  With the manufacturing method of the light control film 1 according to the present invention having such a structural feature, the light control film 1 having weather resistance such as ultraviolet light resistance and having a heat ray selective absorption function can be suppressed. Can be manufactured with good yield. More specifically, the method includes a step of transferring the ultraviolet absorbing layer 20 containing the ultraviolet absorbing material or laminating the ultraviolet absorbing film 30 containing the ultraviolet absorbing material to the heat ray selective absorbing film 10 prepared in advance. A step of directly applying or printing the ultraviolet absorbing layer on the selective absorption film 10 is not necessary. As a result, the waste of the raw material at the time of coating and printing can be eliminated, and the yield of the entire light control film can be improved. Moreover, since the ultraviolet ray absorbing layer 20 and the ultraviolet ray absorbing film 30 are provided on the heat ray selective absorption film 10 prepared in advance, the ultraviolet ray curing at the time of forming the light transmitting portion 11 constituting the heat ray selective absorption film 10 is hindered. There is also an advantage that there is nothing.

  Some embodiments of the present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to those described in the following examples unless it exceeds the gist.

[Example 1]
<Preparation of heat ray selective absorption film>
First, a 100 μm-thick polyethylene terephthalate (PET) film (A4300, manufactured by Toyobo Co., Ltd.) is used as a film substrate, and a liquid ultraviolet curable resin composition prepared as follows is cured on its easy-adhesive surface. It applied so that the film thickness after that might be set to 100 micrometers.

(Liquid ultraviolet curable resin composition)
-Urethane acrylate-based prepolymer 70 parts by mass-Dipentaerythritol hexaacrylate monomer (DPHA) 28 parts by mass-1-hydroxy-cyclohexyl-phenyl-ketone (trade name: Irgacure 184, manufactured by Ciba Specialty Chemicals) 2 parts by mass

  Next, the roll-shaped metal mold | die for shaping the recessed part for heat ray absorption parts to the apply | coated ultraviolet curable resin composition was prepared. This roll-shaped mold has a convex group (a group having a shape opposite to that of the heat-ray absorbing unit) in which a plurality of convex portions linearly connected in the circumferential direction on the surface thereof are arranged in parallel with each other at a period of 78 μm. . The convex part is a rectangle whose main cut surface is 63 μm in height and whose width on the surface side is 24 μm. The roll mold thus prepared was pressed against the ultraviolet curable resin composition coated on the PET film, and irradiated with ultraviolet rays from a mercury lamp in that state. The ultraviolet curable resin composition was cross-linked and cured by irradiation with ultraviolet rays, and then the roll-shaped mold was released to form the light transmissive portion 11 on the film substrate 13. On the surface of the light transmissive portion 11, a concave groove that is linearly connected in one direction is provided. The concave groove is a groove portion whose main cut surface is a rectangle having a height Ta of 63 μm and a width Wa of 24 μm.

  Next, a liquid infrared absorbing material-containing composition prepared to have the following composition was applied to the groove and filled.

(Liquid infrared absorbing material-containing composition)
-93 parts by mass of transparent acrylic prepolymer-5 parts by mass of ATO nanoparticles (average particle size: 100 nm)-1-hydroxy-cyclohexyl-phenyl-ketone (trade name: Irgacure 184, manufactured by Ciba Specialty Chemicals) 2 parts by mass

  Next, the applied infrared absorbing material-containing composition was squeezed with an iron doctor blade to scrape off the composition outside the groove, and the infrared absorbing material-containing composition was filled only in the groove. Then, the infrared ray absorbing material-containing composition was crosslinked and cured to form the heat ray absorbing portion 12 by irradiating the filled groove portion with ultraviolet rays from a mercury lamp. The heat ray selective absorption film 10 obtained in this way is composed of a film base 13 and a shaping part 14 (light transmissive part 11 and heat ray absorption part 12) provided on the film base.

<Preparation of UV absorbing layer>
Next, the liquid thermosetting resin composition prepared to the following composition was apply | coated on the easily bonding surface of the polyethylene terephthalate (PET) film (Toyobo Co., Ltd. make, A4300) of thickness 100micrometer prepared separately. The coating was performed so that the film thickness after curing was 3 μm, and heated and dried at 60 ° C. for 30 seconds to form a primer layer having weather resistance (ultraviolet ray resistance).

(Liquid thermosetting resin composition)
Polycarbonate urethane acrylic copolymer (urethane component: acrylic component = 70:30) 90 parts by mass 6 functional urethane acrylate 10 parts by mass Hydroxyphenyltriazine UV absorbing material: 85% 2- (4,6-bis ( Reaction product of 2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hydroxyphenyl and oxirane [(C10-C16, mainly C12-C13 alkyloxy) methyl], 15% 1-methoxy-2-propanol (trade name: Tinuvin 400, manufactured by Ciba Specialty Chemicals) 15 parts by mass-Hydroxyphenyltriazine-based ultraviolet absorbing material: 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy) ] Phenyl) -4,6-bis (4-phenylphenyl)- , 3,5-triazine (trade name: Tinuvin 479, manufactured by Ciba Specialty Chemicals Co., Ltd.) 5 parts by mass Hindered amine light stabilizing material: bis (2,2,6,6-tetramethyl-1- (octyl) decanedioate Oxy) -4-piperidinyl) ester, 1,1-dimethylethyl hydroperoxide, and octane reaction product (trade name: Tinuvin 123, manufactured by BASF Japan Ltd.) 6 parts by mass Curing agent: hexanemethylene diisocyanate 5 Parts by mass

  Furthermore, a liquid ionizing radiation curable resin composition prepared in the following composition was applied on the primer layer so that the film thickness after curing was 3 μm. After the application, an electron beam was irradiated under the conditions of 165 keV and 10 Mrad (100 kGy) to cure by crosslinking and form a weather resistant layer (ultraviolet ray resistant layer). The layer structure of the ultraviolet absorbing film 30 obtained as described above is a weather resistant hard coat layer in which a base film, a primer layer, and an ultraviolet absorbing layer are laminated in that order.

(Liquid ionizing radiation curable resin composition)
-Hexafunctional urethane acrylate 100 parts by mass-Hydroxyphenyltriazine-based UV absorbing material: 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy] phenyl) -4,6-bis (4-phenylphenyl) -1 , 3,5-triazine (trade name: Tinuvin 479, manufactured by Ciba Specialty Chemicals Co., Ltd.) 4 parts by mass • Hindered amine light stabilizing material: 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (product) Name: Sanol LS-3410, manufactured by BASF Japan Ltd.) 4 parts by mass-Scratch resistant filler: 10 parts by mass of colloidal silica

<Lamination>
Finally, the shaping portion 12A constituting the obtained heat ray selective absorption film 10 and the base film (opposite side of the ultraviolet absorption layer) constituting the obtained ultraviolet absorption film 30 are passed through the adhesive for dry lamination. The light control film 1 having weather resistance (ultraviolet ray deterioration resistance) was produced by dry lamination. The layer structure of the light control film 1 thus obtained is as follows: the ultraviolet absorbing layer, the primer layer, the base film, the adhesive layer, the shaping part (light transmissive part and heat ray absorbing part), and the film base material in that order. It is configured.

[Example 2]
<Preparation of heat ray selective absorption film>
The same heat ray selective absorption film 10 as Example 1 was produced by the same material and method as Example 1. This heat ray selective absorption film 10 includes a film base 13 and a shaping part 14 (light transmissive part 11 and heat ray absorption part 12) provided on the film base.

  Thereafter, the liquid ultraviolet curable resin composition same as that filled in the heat ray absorbing portion 12 is used, and the light transmissive portion 11 and the heat ray absorbing portion 12 are formed so that the film thickness after curing is 70 μm. It applied on the heat ray selective absorption film 10. After coating, the surface protective layer was formed by irradiating with ultraviolet rays from a mercury lamp to be crosslinked and cured. The heat ray selective absorption film 10 thus obtained is formed of a film base 13, a shaping part 14 (light transmissive part 11 and heat ray absorption part 12) provided on the film base, and a surface protective layer 50. ing.

<Preparation of UV absorbing layer>
Next, a primer layer was formed in the same manner as in Example 1 except that a liquid thermosetting resin having the following composition was used.

(Liquid thermosetting resin composition)
Polycarbonate urethane acrylic copolymer (urethane component: acrylic component = 70: 30) 95 parts by mass 6 functional urethane acrylate 5 parts by mass Hydroxyphenyltriazine UV absorbing material: 85% 2- (4,6-bis ( Reaction product of 2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hydroxyphenyl and oxirane [(C10-C16, mainly C12-C13 alkyloxy) methyl], 15% 1-methoxy-2-propanol (trade name: Tinuvin 400, manufactured by Ciba Specialty Chemicals) 15 parts by mass-Hydroxyphenyltriazine-based ultraviolet absorbing material: 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy) ] Phenyl) -4,6-bis (4-phenylphenyl) -1 3,5-triazine (trade name: Tinuvin 479, manufactured by Ciba Specialty Chemicals Co., Ltd.) 5 parts by mass • Hindered amine light stabilizing material: bis (2,2,6,6-tetramethyl-1- (octyloxy) decanedioate ) -4-piperidinyl) ester, reaction product of 1,1-dimethylethyl hydroperoxide and octane (trade name: Tinuvin 123, manufactured by BASF Japan Ltd.) 6 parts by mass-Curing agent: 6 parts by mass of hexanemethylene diisocyanate

  Furthermore, a liquid ionizing radiation curable resin having the following composition was applied on the primer layer under the same conditions as in Example 1. The layer structure of the ultraviolet absorbing film 30 is a weather resistant hard coat layer in which a base film, a primer layer, and an ultraviolet absorbing layer are laminated in that order.

(Liquid ionizing radiation curable resin)
-Hexafunctional urethane acrylate 100 parts by mass-UV absorbing material: 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy] phenyl) -4,6-bis (4-phenylphenyl) -1,3,5 -Triazine (trade name: Tinuvin 479, manufactured by Ciba Specialty Chemicals) 4 parts by mass-Hindered amine light stabilizing material: 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (trade name: Sanol LS) -3410, manufactured by BASF Japan Ltd.) 4 parts by mass-Scratch resistant filler: 10 parts by mass of colloidal silica

<Lamination>
Finally, a film base material (opposite side of the shaping portion 14) constituting the obtained heat ray selective absorption film 10, and a base film (opposite side of the ultraviolet absorption layer) constituting the obtained ultraviolet light absorption film 30 Was dry laminated through an adhesive for dry lamination to produce a light control film 1 having weather resistance (ultraviolet ray deterioration resistance). The layer structure of the light control film 1 thus obtained is as follows: UV absorbing layer, primer layer, substrate film, adhesive layer, shaping part (light transmissive part and heat ray absorbing part), film substrate, surface protective layer Are organized in that order.

[Comparative Example 1]
In Examples 1 and 2, the heat control film 1 was prepared by laminating the heat ray selective absorption film 10 and the ultraviolet absorption film 30 by dry lamination. In Comparative Example 1, the light control film 1 was sequentially laminated without being laminated. A control film was prepared.

  First, the liquid thermosetting resin composition prepared to the following composition was apply | coated on the easy-adhesion surface of a 100-micrometer-thick polyethylene terephthalate (PET) film (Toyobo Co., Ltd. make, A4300). The coating was performed so that the film thickness after curing was 3 μm, and heated and dried at 60 ° C. for 30 seconds to form a primer layer having weather resistance (ultraviolet ray resistance).

(Liquid thermosetting resin composition)
Polycarbonate urethane acrylic copolymer (urethane component: acrylic component = 70:30) 90 parts by mass 6 functional urethane acrylate 10 parts by mass Hydroxyphenyltriazine UV absorbing material: 85% 2- (4,6-bis ( Reaction product of 2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hydroxyphenyl and oxirane [(C10-C16, mainly C12-C13 alkyloxy) methyl], 15% 1-methoxy-2-propanol (trade name: Tinuvin 400, manufactured by Ciba Specialty Chemicals) 15 parts by mass-Hydroxyphenyltriazine-based ultraviolet absorbing material: 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy) ] Phenyl) -4,6-bis (4-phenylphenyl)- , 3,5-triazine (trade name: Tinuvin 479, manufactured by Ciba Specialty Chemicals Co., Ltd.) 5 parts by mass Hindered amine light stabilizing material: bis (2,2,6,6-tetramethyl-1- (octyl) decanedioate Oxy) -4-piperidinyl) ester, 1,1-dimethylethyl hydroperoxide, and octane reaction product (trade name: Tinuvin 123, manufactured by BASF Japan Ltd.) 6 parts by mass Curing agent: hexanemethylene diisocyanate 5 Parts by mass

  Furthermore, a liquid ionizing radiation curable resin composition prepared in the following composition was applied on the primer layer so that the film thickness after curing was 3 μm. After the application, an electron beam was irradiated under the conditions of 165 keV and 10 Mrad (100 kGy) to cure by crosslinking and form a weather resistant layer (ultraviolet ray resistant layer). The layer structure of the ultraviolet absorbing film obtained as described above is a weather resistant hard coat layer in which a base film, a primer layer, and an ultraviolet absorbing layer are laminated in that order.

(Liquid ionizing radiation curable resin composition)
-Hexafunctional urethane acrylate 100 parts by mass-Hydroxyphenyltriazine-based UV absorbing material: 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy] phenyl) -4,6-bis (4-phenylphenyl) -1 , 3,5-triazine (trade name: Tinuvin 479, manufactured by Ciba Specialty Chemicals Co., Ltd.) 4 parts by mass • Hindered amine light stabilizing material: 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (product) Name: Sanol LS-3410, manufactured by BASF Japan Ltd.) 4 parts by mass-Scratch resistant filler: 10 parts by mass of colloidal silica

  Next, on the other side of the base film (the side on which the UV absorbing layer and the primer layer are not formed), the liquid UV curable resin composition prepared in the following composition has a thickness after curing of 100 μm. It was applied as follows.

(Liquid ultraviolet curable resin composition)
-Urethane acrylate-based prepolymer 70 parts by mass-Dipentaerythritol hexaacrylate monomer (DPHA) 28 parts by mass-1-hydroxy-cyclohexyl-phenyl-ketone (trade name: Irgacure 184, manufactured by Ciba Specialty Chemicals) 2 parts by mass

  Next, in the same manner as in Examples 1 and 2, a roll-shaped mold for forming a concave portion for a heat ray absorbing portion in the applied ultraviolet curable resin composition was prepared. This roll-shaped mold has a convex group (a group having a shape opposite to that of the heat-ray absorbing unit) in which a plurality of convex portions linearly connected in the circumferential direction on the surface thereof are arranged in parallel with each other at a period of 78 μm. . The convex part is a rectangle whose main cut surface is 63 μm in height and whose width on the surface side is 24 μm. The roll mold thus prepared was pressed against the ultraviolet curable resin composition coated on the PET film, and irradiated with ultraviolet rays from a mercury lamp in that state. The ultraviolet curable resin composition was cross-linked and cured by irradiation with ultraviolet rays, and then the roll-shaped mold was released to form the light transmissive portion 11 on the film substrate 13. On the surface of the light transmissive portion 11, a concave groove that is linearly connected in one direction is provided. The concave groove is a groove portion whose main cut surface is a rectangle having a height Ta of 63 μm and a width Wa of 24 μm.

  Next, in the same manner as in Example 1, the liquid infrared absorbing material-containing composition prepared in the following composition was filled and filled in the groove (concave portion) on the surface after forming the light transmissive portion 11. .

(Liquid infrared absorbing material-containing composition)
-93 parts by mass of transparent acrylic prepolymer-5 parts by mass of ATO nanoparticles (average particle size: 100 nm)-1-hydroxy-cyclohexyl-phenyl-ketone (trade name: Irgacure 184, manufactured by Ciba Specialty Chemicals) 2 parts by mass

  Next, the applied infrared absorbing material-containing composition was squeezed with an iron doctor blade to scrape off the composition outside the groove, and the infrared absorbing material-containing composition was filled only in the groove. Then, the infrared ray absorbing material-containing composition was crosslinked and cured to form the heat ray absorbing portion 12 by irradiating the filled groove portion with ultraviolet rays from a mercury lamp. The heat ray selective absorption film thus obtained is composed of a film base 13 and a shaping portion 14 (light transmissive portion 11 and heat ray absorption portion 12) provided on the film base.

  Thereafter, the liquid ultraviolet curable resin composition same as that filled in the heat ray absorbing portion 12 is used, and the light transmissive portion 11 and the heat ray absorbing portion 12 are formed so that the film thickness after curing is 70 μm. It applied on the heat ray selective absorption film 10. After coating, the surface protective layer was formed by irradiating with ultraviolet rays from a mercury lamp to be crosslinked and cured. The layer structure of the light control film 1 thus obtained is as follows: an ultraviolet absorbing layer, a primer layer, a base film, a shaping part (light transmissive part and heat ray absorbing part), a film base, and a surface protective layer in that order. It consists of

[Measurements and results]
(Measurement of curing rate of shaped part)
About the light control film of Example 1 and Comparative Example 1, the FT-IR spectrum of the shaping part formed on the film base material is a Fourier transform infrared spectrophotometer (manufactured by JASCO Corporation, FT / IR-610). It measured using. From the measurement results, the curing rate was calculated using the following formula. Incidentally, Table peak ratio of each excipient unit, aromatic C = C peak intensity of the (1424~1490cm ^-1) as a reference value 1, C = C peak intensity to it (798~818cm ^-1) did.

  Curing rate [%] = [1- (peak ratio of cured shaped part) / (peak ratio of uncured shaped part)] × 100

(Shape after releasing the roll mold)
About the light control film of Example 1 and the comparative example 1, the shape of the shaping part formed on the film base material was used using the ultra high resolution field emission scanning electron microscope (Hitachi High-Tech Co., Ltd. make, SU-8000). Observed. The result was evaluated by confirming whether or not the shape after releasing the roll-shaped mold was maintained. Table 1 shows the curing rate of each shaped part of Example 1 and Comparative Example 1 and the shape after release from the roll-shaped mold. In Table 1, “◯” indicates the case where the shaped part maintains the same shape as the mold, and “X” indicates the case where the shaped part does not maintain the same shape as the mold.

(result)
As shown in Table 1, it was confirmed that the light control film of Example 1 had a curing rate of the shaped portion of about 90%, and the shape after release maintained the same shape as the mold. As a result, it was confirmed that the shaped part was sufficiently cured by ultraviolet irradiation. On the other hand, in the light control film of Comparative Example 1, the cured part had a curing rate of about 13%, and the shape after release. It was also observed that it was broken. As a result, it was confirmed that UV curing of the shaped part was inhibited by the presence of the weather resistant layer.

  14 is a graph showing the transmittance measurement results of the light control film used in Example 1. FIG. In the measurement, the transmittance was measured using an infrared-visible ultraviolet spectrophotometer UV-3100PC (manufactured by Shimadzu Corporation) with a light control film attached to a 3 mm thick float glass. The result of FIG. 14 is a result of the wavelength and transmittance when the incident angle θ of sunlight (see FIG. 13A) is 0 °, 30 °, 45 °, and 60 °. From the results, it was confirmed that infrared rays were effectively absorbed when the incident angle θ of sunlight was 30 ° or more.

DESCRIPTION OF SYMBOLS 1,1A-1J Light control film 10 Heat ray selective absorption film 10S Film surface 11 Light transmissive part 11a Trapezoid part 12 Heat ray absorption part 12A Recessed shape (wedge shape or rectangular shape) 12S Bottom surface 13 Film base material 14 Reinforcement Shape part 20 UV absorbing layer 20a, 20b, 20c, 20d Transfer film including UV absorbing layer 20e Transfer type dry laminate film 20 'Heat fusion layer 21 Release film 22 Base film 25 Adhesive layer 26 Adhesive UV absorbing layer DESCRIPTION OF SYMBOLS 30 Ultraviolet absorption film 30a Ultraviolet absorption layer 30b Base film 30 'Heat-fusion layer 31 Release film 35 Adhesive layer 40 Adhesive layer 40a, 40b Adhesive layer transfer film 41 Release film 50 Functional layer such as protective layer 70 Surface on the platen side 71 Plate to be adhered 80 Surface on the solar side 81 Sunlight 90 Surface on the indoor side

A Sunlight in summer B Sunlight in winter X In-plane direction of light-transmitting portion Y Thickness direction of light-transmitting portion θ Angle between sunlight traveling direction and horizontal direction (sunlight incident angle)
θ ₀₁ Refraction angle when sunlight enters the light-transmitting part θa Angle from normal line Ta Height of wedge-shaped part Pa Wedge-shaped pitch Wa Wedge-shaped base width

Claims (10)

A heat ray having a light-transmitting part formed of an ultraviolet curable resin and having a shaping part elongated in the thickness direction arranged in parallel, and a heat ray absorbing part containing an infrared absorbing material in the shaping part A step of preparing a selective absorption film;
A light control film comprising: a step of preparing an ultraviolet absorbing layer or an ultraviolet absorbing film containing an ultraviolet absorbing material; and a step of laminating the heat ray selective absorbing film and the ultraviolet absorbing layer or the ultraviolet absorbing film. Manufacturing method.   A first step of providing an ultraviolet curable resin on the film base material for the heat ray selective absorption film, and a step of forming the concave shaped portion extending elongated in the thickness direction by shaping the ultraviolet curable resin. Two steps, a third step of forming the light-transmitting part having the shaped part by irradiating the shaped ultraviolet curable resin with ultraviolet rays, and an infrared absorbing material in the shaped part The method for producing a light control film according to claim 1, wherein the light control film is formed by a method including a fourth step of filling and forming the heat ray absorbing portion.   The manufacturing method of the light control film of Claim 1 or 2 which performs the said bonding by thermal transfer, heat lamination, or dry lamination.   The light control film is an externally-attached light control film, and of the both surfaces of the heat ray selective absorption film, on the surface on the sunlight side to which the ultraviolet absorbing layer is bonded, through a heat fusion layer or its own heat The method for producing a light control film according to any one of claims 1 to 3, wherein the ultraviolet absorbing layer is thermally transferred by fusing property.   The light control film is an externally attached light control film, and among the both surfaces of the heat ray selective absorption film, on the surface on the sunlight side to which the ultraviolet absorption layer or the ultraviolet absorption film is bonded, through a heat fusion layer. The method for producing a light control film according to any one of claims 1 to 3, wherein the ultraviolet absorbing film is heat laminated by heat fusion of itself or by itself.   The light control film is an externally attached light control film, and of the both surfaces of the heat ray selective absorption film, on the surface on the sunlight side where the ultraviolet absorption layer or the ultraviolet absorption film is bonded, via the adhesive layer The method for producing a light control film according to any one of claims 1 to 3, wherein the ultraviolet absorbing layer or the ultraviolet absorbing film is dry laminated.   The light according to claim 1, wherein the light control film is an externally attached light control film, and the ultraviolet absorbing layer or the ultraviolet absorbing film is formed of an electron beam curable resin. Control film manufacturing method.   The light control film is an externally attached light control film, and is attached to the opposite surface of the sunlight side surface to which the ultraviolet absorbing layer or the ultraviolet absorbing film is bonded, out of both surfaces of the heat ray selective absorbing film. The manufacturing method of the light control film of any one of Claims 1-9 in which the adhesion layer for sticking to a board is provided.   The light control film is an inner-attached light control film, and a heat-sealable layer or a heat-sealable film is provided on the solar-side surface of the heat ray selective absorption film on which the ultraviolet absorbing layer is bonded. The manufacturing method of the light control film of any one of Claims 1-3 which heat-transfers or heat-laminates the said ultraviolet-ray absorption layer which is adhesive via.   The light control film is an inner-attached light control film, and the ultraviolet light absorption that is adhesive through the adhesive layer on the solar light side surface on which the ultraviolet light absorption layer is bonded, out of both surfaces of the heat ray selective absorption film The method for producing a light control film according to claim 1, wherein the layers are dry-laminated.

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