JP2016109861A - Daylighting film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a daylighting film that offers reduced material cost and is less susceptible to having gas bubbles formed between the film and an adhesion target, and to provide a laminated glass having the same.SOLUTION: A daylighting film 1 includes a plurality of light-transmissive transparent sections 9 and a plurality of air-permeable air gap sections 10, which are alternately arranged in sequence in a longitudinal direction of the daylighting film 1. Each of the plurality of transparent sections 9 is adhesive at least on one of two surfaces in a thickness direction thereof.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a daylighting film and a laminated glass including the daylighting film.

  2. Description of the Related Art Conventionally, so-called daylighting (also referred to as sunlight illumination or daylight illumination) is known in which sunlight is introduced indoors in order to adjust the environment such as indoor brightness of a building. However, in recent years, from the viewpoint of reducing the environmental load, it has been desired to introduce sunlight more efficiently indoors and reduce the use of artificial lighting during the daytime.

  Therefore, there are various ways to efficiently introduce sunlight into an indoor by an optical member capable of changing the traveling direction of light by optical action such as light refraction, diffraction or reflection, and to improve indoor brightness. It is being considered.

  As such an optical member, for example, an optical element including a light transmission layer containing a periodic structure of voids arranged at a predetermined pitch in the vertical direction has been proposed (for example, see Patent Document 1).

JP 2012-38626 A

  However, the optical element described in Patent Document 1 is generally attached to the indoor side of the window material through the adhesive layer after the adhesive layer is provided on the entire surface. At this time, air may be caught between the window material and the adhesive layer, and may be sandwiched between them to form bubbles.

  In such a case, bubbles formed between the window material and the adhesive layer hinder the introduction of light (for example, sunlight) from the outdoors to the interior, and there is a problem that efficient lighting cannot be performed. Moreover, since it is necessary to separately provide an adhesive layer on the optical element, there is a limit in reducing the material cost.

  Therefore, an object of the present invention is to provide a daylighting film that can suppress the formation of bubbles between the object to be adhered and a laminated glass including the daylighting film while being able to reduce the material cost. There is.

  The daylighting film of the present invention is a daylighting film configured to transmit light and reflect light, and includes a plurality of transparent parts that can transmit light and a plurality of ventilation parts that allow air to pass through. Each of the plurality of transparent portions and each of the plurality of ventilation portions are arranged so as to continue alternately in an orthogonal direction orthogonal to the thickness direction of the daylighting film, and each of the plurality of transparent portions Is characterized in that at least one of both end faces in the thickness direction has adhesiveness.

  According to such a configuration, since each of the plurality of transparent portions has adhesiveness in at least one of the end surfaces in the thickness direction, the end surface having the adhesiveness of the transparent portion is attached to the object to be attached. And eventually the lighting film can be attached to the object to be attached. That is, the daylighting film can be directly attached to the object to be pasted without providing a separate adhesive layer on the daylighting film. Therefore, it is possible to suppress the formation of bubbles between the daylighting film and the object to be stuck by entraining air. In addition, the material cost can be reduced.

  In addition, each of the plurality of transparent portions and each of the plurality of ventilation portions are arranged so as to be alternately continued in the orthogonal direction. And in the ventilation part, passage of air is permitted. Therefore, when sticking a lighting film to a sticking object, the air positioned between the lighting film and the sticking object is between the lighting film and the sticking object via a plurality of ventilation portions. Removed from. As a result, it is possible to further reduce air from being sandwiched between the daylighting film and the object to be adhered and air bubbles being formed between them.

  Further, each of the plurality of transparent portions has adhesiveness at both end surfaces in the thickness direction, and the daylighting film is attached to the other end surface of the plurality of transparent portions and supports them collectively. It is preferable that each of the plurality of ventilation portions is a gap between the transparent portions adjacent to each other among the plurality of transparent portions.

  According to such a structure, since a support body supports a some transparent part collectively, a space | gap can be ensured between mutually adjacent transparent parts among a some transparent part, and the space | gap is comprised as a ventilation part. be able to. And when sticking a daylighting film to a sticking target object, the air between a daylighting film and a sticking target object can be surely escaped via a crevice.

  Moreover, in the state in which the daylighting film is attached to the object to be attached, the light introduced from the outside to the inside can be reliably reflected at the boundary between the transparent portion and the gap.

  That is, the space between the adjacent transparent portions can be used as a ventilation portion that can pass air and a reflection portion that reflects light.

  Therefore, it is not necessary to separately provide a member for reflecting light in the daylighting film, and the material cost can be further reduced.

  It is preferable that the support is a transparent adhesive tape capable of transmitting light.

  According to such a configuration, even if the daylighting film is attached to the object to be attached in a state where the plurality of transparent portions are collectively supported by the support, the support is not capable of transmitting light from the outdoors to the indoors. Inhibiting the introduction can be suppressed.

  In addition, each of the plurality of ventilation portions is made of a porous body having a plurality of continuous pores, and each of the plurality of transparent portions has adhesiveness at both end surfaces in the orthogonal direction. Each of the transparent portions and each of the plurality of ventilation portions are preferably bonded to each other.

  According to such a configuration, since the transparent portion and the ventilation portion are bonded to each other, a plurality of transparent portions and ventilation portions can be formed without providing a separate support for supporting the transparent portion and the ventilation portion. It can suppress falling apart. Therefore, the material cost can be further reduced.

  Further, since the ventilation portion is made of a porous body, when the daylighting film is attached to the object to be adhered, the air between the daylighting film and the object to be adhered is surely passed through the continuous pores of the porous body. I can escape.

  In addition, in a state where the daylighting film is attached to the object to be attached, the light introduced from the outside to the inside can be reliably reflected and scattered by the continuous pores.

  That is, a porous body having a plurality of continuous pores can be used as a ventilation part that can pass air, a reflection part that reflects light, and a light scattering part that scatters light.

  For this reason, in the daylighting film, there is no need to separately provide a reflection part for reflecting light and a light scattering part for scattering light, and the material cost can be further reduced.

  Each of the plurality of transparent portions is preferably made of a transparent adhesive.

  According to such a structure, since a transparent part consists of adhesives, adhesiveness can be provided to all the exposed surfaces of a transparent part by simple structure. In addition, unlike the case where the transparent portion is formed from an adhesive layer and a transparent layer, an interface is not formed in the transparent portion, and air entrainment can be reduced.

  The laminated glass of the present invention includes the above-described daylighting film and a pair of glass members disposed so as to sandwich the daylighting film in the thickness direction, and the plurality of transparent portions are formed of the pair of glass members. It is characterized by being directly bonded to at least one of them.

  According to such a configuration, since the laminated glass includes the above-described daylighting film, the formation of bubbles between the glass member and the glass member can be suppressed while the material cost can be reduced.

  According to the daylighting film and the laminated glass of the present invention, it is possible to suppress the formation of bubbles between the glass member and the material cost while reducing the material cost.

FIG. 1 is a perspective view of a first embodiment of a daylighting film of the present invention. FIG. 2 is a side sectional view of the daylighting film shown in FIG. FIG. 3 is a perspective view of a unit film according to the daylighting film shown in FIG. FIG. 4 is an explanatory diagram for explaining a process in which the side layer of the laminate is cut after the support is attached to the side of the laminate formed by laminating the unit films shown in FIG. 3. . FIG. 5 is an explanatory diagram for explaining a process of cutting out a plurality of unit films shown in FIG. 3 from a processed sheet. FIG. 6 is a schematic configuration diagram for explaining a production unit for continuously producing the daylighting film shown in FIG. 1. FIG. 7 is an explanatory diagram for explaining a state in which the daylighting film shown in FIG. 1 is attached to the glass window. FIG. 8 is a perspective view of a second embodiment of the daylighting film of the present invention. FIG. 9 is a perspective view of a unit film according to the daylighting film shown in FIG. FIG. 10 is an explanatory diagram for explaining a process in which the side layer of the laminate formed by laminating the unit films shown in FIG. 9 is cut. FIG. 11 is an explanatory diagram for explaining a state in which the daylighting layer shown in FIG. 8 is attached to the glass window. FIG. 12 is a perspective view of a third embodiment of the daylighting film of the present invention. FIG. 13A is an explanatory diagram for explaining the manufacturing process of the laminated glass of the present invention, and shows a process of peeling the first peeled body from the daylighting layer. FIG. 13B is an explanatory diagram for explaining the laminated glass manufacturing process subsequent to FIG. 13A, and shows a process of peeling the second peeled body after the daylighting layer is attached to the glass member. FIG. 13C is an explanatory diagram for explaining a laminated glass manufacturing process following FIG. 13B, and shows a process of manufacturing a laminated glass by attaching a glass member so as to sandwich the daylighting layer.

1. As shown in FIG. 1, the daylighting film 1 has a flexible sheet shape (film shape). Specifically, the daylighting film 1 has a predetermined thickness and is orthogonal to the thickness direction. It extends in a predetermined direction (longitudinal direction and lateral direction), and has a flat surface and a flat back surface.

  The dimension in the thickness direction of the daylighting film 1 is, for example, 30 μm or more, preferably 50 μm or more, for example, 1500 μm or less, and preferably 500 μm or less from the viewpoint of permeability.

  The daylighting film 1 has a rectangular shape when viewed from the thickness direction of the daylighting film 1. The size of the daylighting film 1 is appropriately changed according to the purpose of use, but the dimension in the longitudinal direction (an example of the orthogonal direction) orthogonal to the thickness direction of the daylighting film 1 is, for example, 10 cm or more, preferably 60 cm or more. For example, it is 200 cm or less, preferably 100 cm or less, and the lateral dimension orthogonal to both the thickness direction and the longitudinal direction is, for example, 5 cm or more, preferably 10 cm or more, for example, 150 cm or less, preferably 80 cm. It is as follows.

  Such a daylighting film 1 is configured to transmit light and reflect light, and includes a daylighting layer 2, a support 3, and a peeling body 4.

  The daylighting layer 2 is sandwiched between the support 3 and the release body 4 in the thickness direction of the daylighting film 1 and has a thin film shape extending in the vertical direction and the horizontal direction. One surface in the thickness direction of the daylighting layer 2 is a support surface 2A supported by the support 3, and in the daylighting layer 2, the surface opposite to the support surface 2 A is an affixed surface that is adhered to the release body 4. 2B.

  The daylighting layer 2 includes a plurality of transparent portions 9 and a plurality of gap portions 10 as an example of a plurality of ventilation portions.

  The plurality of transparent portions 9 are arranged in parallel in the vertical direction with a slight gap (gap portion 10) therebetween. Each of the plurality of transparent portions 9 can transmit light and has a substantially prismatic shape extending in the lateral direction. Each of the plurality of transparent portions 9 extends over the entire thickness direction and lateral direction of the daylighting layer 2.

  The ratio of the dimension in the thickness direction of the transparent part 9 to the dimension in the thickness direction of the transparent part 9 (thickness direction dimension of the transparent part 9 / vertical dimension of the transparent part 9) is, for example, 0.5 or more, preferably 1.0. For example, it is 2.5 or less, preferably 2.0 or less.

  The volume ratio of each of the plurality of transparent portions 9 with respect to the daylighting layer 2 (volume per one transparent portion 9 / volume of the daylighting layer 2 × 100) is, for example, 0.001% by volume or more, preferably 0.8. 05 volume% or more, for example, 1.6 volume% or less, preferably 1 volume% or less.

  The volume ratio of the sum of the plurality of transparent portions 9 to the daylighting layer 2 (the sum of the volumes of the plurality of transparent portions 9 / the volume of the daylighting layer 2 × 100) is, for example, 90% by volume or more, preferably 93 volumes. % Or more, more preferably 95% by volume or more, for example 99% by volume or less, preferably 98% by volume or less.

  More specifically, the transparent part 9 includes an adhesive part 11 and a pair of non-adhesive parts 12 as shown in FIG.

  The adhesive portion 11 is a substantially central portion in the vertical direction of the transparent portion 9. The adhesive portion 11 extends over the entire thickness direction and lateral direction of the daylighting layer 2. The adhesive portion 11 has a substantially rectangular shape in side view, and includes a first surface 11A that is one surface in the thickness direction, a second surface 11B that is opposite to the first surface 11A in the thickness direction, and a lower surface in the vertical direction. It has a certain third surface 11C and a fourth surface 11D that is the upper surface in the vertical direction.

  Moreover, the adhesion part 11 is comprised so that light may be permeate | transmitted, and has adhesiveness (surface tack property). That is, each of the first surface 11A to the fourth surface 11D of the adhesive portion 11 has adhesiveness (surface tack property). Such an adhesive part 11 consists of an elastic material which has transparency and adhesiveness, for example, specifically, a transparent adhesive.

  Examples of the transparent adhesive include known adhesives such as an epoxy adhesive, a silicone adhesive, an acrylic adhesive, and an ethylene vinyl alcohol adhesive, and preferably an acrylic adhesive. .

  The longitudinal dimension of the adhesive portion 11 is, for example, 20 μm or more, preferably 50 μm or more, more preferably 100 μm or more, for example, 1 mm or less, preferably 500 μm or less, and more preferably 200 μm or less.

  The ratio of the vertical dimension of the adhesive part 11 to the vertical dimension of the transparent part 9 (vertical dimension of the adhesive part 11 / vertical dimension of the transparent part 9) is, for example, 0.3 or more, preferably 0. 0.5 or more, more preferably 0.7 or more, for example, 0.95 or less, preferably 0.9 or less.

  The light transmittance of the adhesive portion 11 is, for example, 85% or more, preferably 90% or more, for example, 98% or less with respect to light having a wavelength of 440 to 600 nm when the thickness of the adhesive portion 11 is 100 μm. It is.

  Moreover, the relative refractive index of the adhesion part 11 is 1.4 or more with respect to the refractive index of air, for example, Preferably, it is 1.45 or more, for example, 1.8 or less, Preferably, it is 1.6 or less. . The refractive index can be measured with a prism coupler.

  The pair of non-adhesive portions 12 are both longitudinal end portions of the transparent portion 9 and sandwich the adhesive portion 11 in the vertical direction. Each of the pair of non-adhesive portions 12 extends over the entire thickness direction and lateral direction of the daylighting layer 2. Each of the pair of non-adhesive portions 12 has a substantially rectangular shape in a side view extending in the thickness direction, and is bonded to each of both vertical surfaces (third surface 11C and fourth surface 11D) of the adhesive portion 11. Yes.

  Each of the pair of non-adhesive portions 12 is configured to transmit light and does not have adhesiveness (surface tackiness). Such a non-adhesive part 12 is preferably made of a transparent resin material (hard resin material, specifically, a hard resin film) from the viewpoint of ease of processing.

  Examples of the transparent resin material include known resin materials. Examples of the resin material include polyester (for example, polyethylene terephthalate (PET)), polyolefin (for example, polyethylene (PE), polypropylene (PP)). , Polycarbonate (PC), polyvinyl chloride, acrylic resin, polystyrene (PS), epoxy resin, silicone resin, fluororesin, urethane resin, cellulose, polyvinyl butyral, ethylene vinyl acetate copolymer and the like.

  Among such transparent resin materials, polyester is preferable, and polyethylene terephthalate (PET) is more preferable. Such resin materials may be used alone or in combination of two or more.

  The longitudinal dimension of the non-adhesive portion 12 is, for example, 1 μm or more, preferably 10 μm or more, more preferably 20 μm or more, for example, 300 μm or less, preferably 50 μm or less, and more preferably 30 μm or less.

  Further, the ratio of the vertical dimension of each of the pair of non-adhesive parts 12 to the vertical dimension of the transparent part 9 (vertical dimension per one non-adhesive part 12 / vertical dimension of the transparent part 9) is: For example, it is 0.025 or more, preferably 0.05 or more, for example, 0.35 or less, preferably 0.25 or less, and more preferably 0.15 or less.

  The light transmittance of the non-adhesive portion 12 is, for example, 85% or more, preferably 90% or more, for example, 98 with respect to light having a wavelength of 440 to 600 nm when the thickness of the non-adhesive portion 12 is 100 μm. % Or less.

  Further, the relative refractive index of the non-adhesive portion 12 is, for example, 1.4 or more, preferably 1.45 or more, for example, 1.8 or less, preferably 1.6 or less with respect to the refractive index of air. is there. The refractive index can be measured with a prism coupler.

  The plurality of gap portions 10 are defined as gaps between the transparent portions 9 adjacent to each other among the plurality of transparent portions 9. That is, each of the plurality of transparent portions 9 and each of the plurality of gap portions 10 are arranged so as to alternately alternate in the vertical direction. Thereby, in the daylighting layer 2, the pattern P composed of the transparent portion 9 and the gap portion 10 is sequentially and repeatedly arranged in the vertical direction.

  Each of the plurality of gap portions 10 is partitioned by the lower surface of the non-adhesive portion 12 of the upper transparent portion 9 and the upper surface of the non-adhesive portion 12 of the lower transparent portion 9 among the transparent portions 9 adjacent to each other. Yes.

  Therefore, as shown in FIG. 1 and FIG. 2, the gap portion 10 extends over the entire thickness direction and lateral direction of the daylighting layer 2, and the interface 6 between the gap portion 10 and the non-adhesive portion 12 Along the horizontal direction.

  The vertical dimension of the gap 10 is, for example, 0.1 μm or more, preferably 1 μm or more, for example, 50 μm or less, preferably 20 μm or less, and more preferably 5 μm or less.

  Further, the ratio of the vertical dimension of the gap 10 to the vertical dimension of the transparent part 9 (vertical dimension of the gap 10 / vertical dimension of the transparent part 9) is, for example, 0.0001 or more, preferably 0. 0.001 or more, for example, 0.1 or less, preferably 0.05 or less, more preferably 0.01 or less.

  The volume ratio of the sum of the plurality of gaps 10 to the daylighting layer 2 (sum of the volumes of the plurality of gaps 10 / volume of the daylighting layer 2) is, for example, 1% by volume or more, preferably 2% by volume or more. For example, it is 10 volume% or less, Preferably, it is 5 volume% or less.

  The support 3 is disposed on the support surface 2 </ b> A of the daylighting layer 2 and includes a base material 14 and an adhesive layer 13.

  The base material 14 is an outer portion in the thickness direction of the support 3. Examples of the substrate 14 include a substrate such as a PET film, a fluorine-based polymer (for example, polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene copolymer). And low adhesive substrates made of nonpolar polymers (for example, olefinic resins such as polyethylene and polypropylene).

  Among such base materials 14, a transparent film capable of transmitting light is preferable, and a low-adhesion base material made of a transparent nonpolar polymer, particularly preferably a transparent polypropylene film is preferable. Is mentioned.

  The dimension in the thickness direction of the base material 14 is, for example, 10 μm or more, preferably 30 μm or more, for example, 100 μm or less, preferably 50 μm or less.

  The light transmittance of the substrate 14 is, for example, 85% or more, preferably 90% or more, more preferably, with respect to light having a wavelength of 440 to 600 nm when the thickness direction dimension of the substrate 14 is 50 μm. 92% or more, for example, 98% or less.

  The pressure-sensitive adhesive layer 13 is an inner portion in the thickness direction of the support 3, and is disposed in a thin layer on the entire inner surface (surface on the daylighting layer 2 side) of the base material 14. That is, the pressure-sensitive adhesive layer 13 is interposed between the base material 14 and the daylighting layer 2, and adheres the daylighting layer 2 and the base material 14. As a result, the plurality of transparent portions 9 are collectively supported by the adhesive portion 11.

  Examples of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 13 include known transparent pressure-sensitive adhesives such as an epoxy-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, and an ultraviolet curable pressure-sensitive adhesive.

  Among such pressure-sensitive adhesives, an acrylic pressure-sensitive adhesive is preferable. Such pressure-sensitive adhesives may be used alone or in combination of two or more. Moreover, the adhesive layer 13 can also be comprised from a well-known double-sided adhesive tape.

  The dimension in the thickness direction of the pressure-sensitive adhesive layer 13 is, for example, 1 μm or more, preferably 5 μm or more, for example, 100 μm or less, preferably 40 μm or less.

  In addition, when the base material 14 itself is sticky, the pressure-sensitive adhesive layer 13 is not necessary in the support 3.

  Examples of such a support 3 include a known pressure-sensitive adhesive tape having a base material, preferably a transparent pressure-sensitive adhesive tape capable of transmitting light. A commercially available product can be used as the support 3, and examples thereof include SC-01 (manufactured by NITOMS).

  The peeling body 4 is arrange | positioned at the sticking surface 2B of the lighting layer 2, and is adhere | attached on each 2nd surface 11B of the some adhesion part 11. FIG.

  The peelable body 4 is a resin film having flexibility, and examples thereof include the same as the base material 14, and preferably a PET film.

  Although not shown, a release treatment layer is provided on the inner surface in the thickness direction of the release body 4 (the surface on the daylighting layer 2 side). That is, each 2nd surface 11B of the some adhesion part 11 is adhere | attached on the peeling process layer (not shown) of the peeling body 4. FIG. The peeling force of the peeling body 4 by a peeling process layer is adjusted suitably.

2. The manufacturing method of the lighting film Next, the manufacturing method of the lighting film 1 is demonstrated.

  In order to manufacture the daylighting film 1, as shown in FIG. 3, first, a plurality of unit films 16 corresponding to the transparent portion 9 are prepared (prepared).

  The unit film 16 includes an adhesive layer 17 corresponding to the adhesive part 11 and a pair of non-adhesive layers 18 corresponding to the pair of non-adhesive parts 12.

  The adhesive layer 17 is made of, for example, the above transparent adhesive. Examples of such an adhesive layer 17 include a baseless double-sided adhesive tape, that is, a double-sided adhesive tape consisting only of a transparent adhesive, and preferably a double-sided adhesive tape consisting only of an acrylic adhesive. It is done.

  A commercial item can be used as such an adhesion layer 17, for example, Luciax CS9897T (made by Nitto Denko), Luciax CS9673U (made by Nitto Denko) etc. are mentioned.

  Each of the pair of non-adhesive layers 18 is made of, for example, the transparent resin material described above. A commercially available product can be used as the non-adhesive layer 18, and examples thereof include T100-25 (manufactured by Mitsubishi Plastics) and Trefan Bo (manufactured by Toray Industries, Inc.).

  In order to prepare a plurality of unit films 16, first, each of the pair of non-adhesive layers 18 is attached to each of both surfaces in the thickness direction of the adhesive layer 17, and as shown in FIG. To prepare.

  Then, the unit film 16 having a predetermined shape is cut out from the processed sheet 24. In order to cut out the unit film 16 from the processed sheet 24, for example, the processed sheet 24 may be formed large so that a plurality of unit films 16 can be cut out, and a plurality of unit films 16 may be cut out from the processed sheet 24. Alternatively, a plurality of processed sheets 24 may be prepared, and the unit film 16 may be cut out from each processed sheet 24 one by one.

  Among such methods, from the viewpoint of manufacturing cost, preferably, the processed sheet 24 is formed in a long and flat strip shape that is continuous in a predetermined direction so that the plurality of unit films 16 can be cut out. A method of cutting a plurality of unit films 16 from the processed sheet 24 can be mentioned.

  When the processed sheet 24 is formed in a long and flat band shape, the processed sheet 24 preferably has flexibility and is wound in a roll shape. Then, the plurality of unit films 16 are cut out from the portion drawn out from the roll-shaped processed sheet 24.

  Examples of a method for cutting out the unit film 16 from the processed sheet 24 include known processing methods such as cutting and punching.

  The shape of the unit film 16 is not particularly limited, and is, for example, a polygonal shape or a circular shape, preferably a rectangular shape or a circular shape, and particularly preferably a circular shape when viewed from the thickness direction of the unit film 16.

  The size of the unit film 16 is appropriately changed according to the purpose of use. Specifically, when the unit film 16 has a circular shape as viewed from the thickness direction, the diameter is, for example, 10 cm or more, for example, 100 cm or less, and preferably 50 cm or less from the viewpoint of workability. Each of the plurality of unit films 16 is formed to have substantially the same size.

  Thereby, a plurality of unit films 16, for example, 300 or more, preferably 500 or more, more preferably 1000 or more, for example, 60000 or less, preferably 10,000 or less unit films 16 are prepared. The

  Next, as shown in FIG. 4, each of the plurality of unit films 16 is laminated in the thickness direction without sandwiching the pressure-sensitive adhesive layer, thereby preparing (preparing) a laminate 20. That is, the thickness direction of the unit film 16 and the lamination direction of the laminated body 20 are the same direction. Further, the outer peripheral edges of the plurality of unit films 16 coincide with each other when projected in the laminating direction.

  Thereby, in the laminated body 20, the pattern which consists of the non-adhesion layer 18, the adhesion layer 17, and the non-adhesion layer 18 is repeatedly arrange | positioned sequentially in the lamination direction.

  In the laminate 20, a slight amount of air is interposed between the unit films 16 adjacent to each other in the stacking direction, more specifically, between the non-adhesive portions 12 adjacent to each other in the stacking direction. Is provided as a void layer 23 and demarcates unit films 16 adjacent to each other.

  As described above, the stacked body 20 extending in the stacking direction is prepared. For example, when the unit film 16 is rectangular when viewed from the thickness direction, a prismatic laminate 20 is prepared, and when the unit film 16 is circular when viewed from the thickness direction, a columnar laminate 20 is prepared. .

  In FIG. 4, for convenience, the number of unit films 16 is omitted, and the laminated body 20 is described as being composed of six unit films 16. For example, the unit film 16 has 300 to 60000 sheets, preferably 500 to 30000 sheets, and more preferably 1000 to 10000 sheets.

  The height (length in the stacking direction) of the stacked body 20 is, for example, 1 cm or more, preferably 5 cm or more, more preferably 40 cm or more, for example, 200 cm or less, preferably 100 cm or less.

  Subsequently, the support body 3 is affixed on the side surface 21 (surface extending along the stacking direction) of the stacked body 20 so as to be along the stacking direction (thickness direction of the unit film 16).

  In order to affix the support body 3 to the side surface 21 of the laminated body 20, the laminated body 20 is hold | maintained by pressing with respect to the laminated body 20 from the both sides of the lamination direction as needed.

  As a pressurizing condition, the pressure from the outside in the stacking direction with respect to the stacked body 20 is, for example, 0.01 MPa or more, preferably 0.1 MPa or more, for example, 10 MPa or less, preferably 5 MPa or less.

  And the support body 3 is continuously affixed on the laminated body 20 using a touch roll etc. so that the adhesive layer 13 of the support body 3 may adhere | attach on the side surface 21 of the laminated body 20, for example.

  Thereafter, as shown in FIG. 4, the side surface 21 of the laminate 20 to which the support 3 is attached is cut so that the plurality of unit films 16 are arranged in parallel in the lamination direction of the laminate 20.

  The cutting method for cutting the side surface 21 of the stacked body 20 is not particularly limited as long as the side surface 21 supported by the support body 3 can be cut out from the stacked body 20. In such a cutting method, preferably, the laminated body 20 is formed in a cylindrical shape, the cutting blades 34 are arranged along the laminating direction, and then the laminated body 20 is rotated around the axis line to obtain the laminated body 20. From the above, a method of continuously cutting out the side layer 22 supported by the support 3 like a wig is mentioned.

  Thereby, the side layer 22 of the stacked body 20, that is, the daylighting layer 2 is cut out from the stacked body 20. Then, the peeling body 4 is affixed on the surface opposite to the support 3 in the daylighting layer 2.

  By the above, the lighting film 1 provided with the lighting layer 2, the support body 3, and the peeling body 4 is prepared.

  Such a daylighting film 1 is preferably continuously manufactured by a manufacturing unit 28 from the viewpoint of productivity as shown in FIG. In FIGS. 4 and 6, the support 3 is shown as a single layer for convenience.

  The production unit 28 includes a cutting device 29 and a winding device 30.

  The cutting device 29 is configured to continuously cut the side surface layer 22 of the laminate 20 to which the support 3 is attached after the support 3 is attached to the side 21 of the laminate 20. The cutting device 29 includes a rotating shaft 32, a pair of holding members 33, and a cutting blade 34.

  The rotating shaft 32 has a substantially cylindrical shape, and is configured to be rotatable around the axis. A long and flat belt-like support 3 is wound around the rotating shaft 32. Specifically, the long and flat belt-shaped support 3 is wound around the rotary shaft 32 in a spiral shape so that the pressure-sensitive adhesive layer 13 is positioned on the inner side in the radial direction of the rotary shaft 32 with respect to the base material 14. . Thus, the support 3 is configured as a support roll 35 centered on the rotation shaft 32.

  In the support roll 35, the support 3 is disposed adjacent to the radial direction of the rotation shaft 32, and the adhesive layer 13 and the base material 14 are sequentially and repeatedly disposed.

  In addition, when the support body 3 is comprised as the support body roll 35, the peeling process layer is provided in the surface on the opposite side to the adhesive layer 13 in the base material 14. FIG. Therefore, in the radial direction of the rotating shaft 32, the pressure-sensitive adhesive layer 13 of the support 3 arranged on the radially outer side between the support bodies 3 adjacent to each other, and the support 3 arranged on the radially inner side. A release treatment layer (not shown) is interposed between the substrate 14 and the substrate 14.

  In FIG. 6, the pair of holding members 33 are arranged at a lower left position with respect to the support roll 35. Each of the pair of holding members 33 has a substantially disc shape, and is configured to be rotatable about its axis.

  In addition, the pair of holding members 33 are arranged in the same direction as the direction in which the rotating shaft 32 extends and spaced from each other. The pair of holding members 33 hold the stacked body 20 by sandwiching the substantially cylindrical stacked body 20 from both sides in the stacking direction with the above pressure. In addition, each holding member 33 is arrange | positioned so that the laminated body 20 and an axis line may correspond in the state which hold | maintained the laminated body 20. FIG.

  The cutting blade 34 is arranged along the stacking direction with respect to the side surface 21 of the stacked body 20 held by the pair of holding members 33, and the tip of the cutting blade 34 is placed on the side surface 21 of the stacked body 20. In contact.

  In addition, when the diameter of the laminated body 20 decreases as the cutting of the laminated body 20 progresses, the cutting blade 34 maintains the state in which the tip of the cutting blade 34 is in contact with the side surface 21 of the laminated body 20. It is configured to approach 20 axes.

  The winding device 30 is configured to continuously wind up the daylighting film 1 after the peeling body 4 is attached to the daylighting layer 2 (the side layer 22 of the laminated body 20) supported by the support body 3. In FIG. 6, the cutting device 29 is arranged with an interval to the right.

  The winding device 30 includes a rotating shaft 38, a winding shaft 39, and a plurality (two) of rollers 40.

  In FIG. 6, the rotation shaft 38 is disposed at an upper right position with respect to the rotation shaft 32. The rotation shaft 38 has a substantially cylindrical shape extending in the same direction as the rotation shaft 32 and is configured to be rotatable about the axis. A long and flat strip-shaped peeling body 4 is wound around the rotary shaft 38. Specifically, the long and flat strip-shaped peeling body 4 is wound around the rotary shaft 38 in a spiral shape so that a peeling treatment layer (not shown) is positioned on the radially outer side of the rotary shaft 38. Thus, the peeling body 4 is configured as a peeling body roll 41 centering on the rotation shaft 38.

  In FIG. 6, the winding shaft 39 is disposed with a space to the right with respect to the pair of holding members 33, and is disposed with a space to the lower right with respect to the rotation shaft 38. .

  The winding shaft 39 has a substantially cylindrical shape extending in the same direction as the rotation shaft 32 and is configured to be rotatable about the axis. Although the winding shaft 39 will be described later, the manufactured daylighting film 1 is wound.

  Each of the plurality of rollers 40 extends in the same direction as the rotation shaft 32 and is appropriately disposed at a predetermined position.

  In order to continuously manufacture the daylighting film 1 with such a manufacturing unit 28, first, the side surface 21 of the laminate 20 in which the support 3 drawn out from the support roll 35 is held by the pair of holding members 33. Paste to.

  More specifically, the support 3 is drawn toward the tangential direction of the laminate 20 such that the pressure-sensitive adhesive layer 13 of the drawn support 3 adheres to the side surface 21 of the laminate 20, and the central angle in the laminate 20 is For example, it is affixed on the side surface 21 of the laminate 20 in the range of 90 ° to 270 °, preferably in the range of 120 ° to 240 °.

  Next, the pair of holding members 33 are rotationally driven in the counterclockwise direction when viewed from the front side in FIG. 6 by a driving force from a driving source such as a motor provided in the cutting device 29.

  Then, the stacked body 20 held by the pair of holding members 33 rotates about the axis, and the support roll 35 is driven about the axis of the rotating shaft 32.

  Thereby, the side layer 9 of the laminated body 20 to which the support body 3 is attached is continuously cut out by the cutting blade 34 like wig peeling.

  As described above, the daylighting layer 2 supported by the support 3 is formed into a long and flat band shape, and is continuously prepared from the laminate 20 and the support roll 35.

  Next, the peelable body 4 is pulled out from the peelable body roll 41, and the peelable body 4 is attached to the exposed daylighting layer 2 (sticking surface 2B of the daylighting layer 2). Thereby, the long and flat strip-shaped daylighting film 1 is manufactured.

  Thereafter, the end portion of the daylighting film 1 is fixed to the take-up shaft 39, and the take-up shaft 39 is rotated in the clockwise direction when viewed from the front side of the sheet of FIG. Then, the daylighting film 1 is wound around the winding shaft 39 and wound around the winding shaft 39 in a spiral shape to form a roll.

  As shown in FIG. 7, the lighting film 1 manufactured in this way is attached to, for example, an inner surface of a glass window 44 as an example of a sticking target in a building such as a house 43.

  In order to attach the daylighting film 20 to the glass window 44 or the like, first, the daylighting film 20 is cut into a shape and size corresponding to the attachment location. Examples of the method for cutting the daylighting film 20 include known processing methods such as cutting and punching.

  Next, the peeling body 4 is peeled from the daylighting layer 2 to expose the sticking surface 2B of the daylighting layer 2, more specifically, the second surfaces 11B of the plurality of adhesive portions 11 respectively.

  Then, the daylighting layer 2 supported by the support 3 is disposed, for example, so that the vertical direction (stacking direction of the transparent portions 9) is along the vertical direction, and the exposed second surface 11B of the adhesive portion 11 is replaced with a glass window. Affixed to the inner surface of 44.

  Then, the daylighting layer 2 is pressed from the inside of the house 43 toward the glass window 44 via the support body 3 by, for example, a hand roller.

  Then, the air located between the sticking surface 2B of the daylighting layer 2 and the inner side surface of the glass window 44 passes through the plurality of gaps 10 and is discharged from, for example, the lateral end of the daylighting layer 2. . Thereby, air is removed from between the daylighting layer 2 and the glass window 44.

  As described above, the daylighting layer 2 supported by the support 3 is attached to the inner side surface of the glass window 44. In the first embodiment, the support 3 is held on the daylighting layer 2 without being peeled off. Therefore, it is not necessary to provide a release treatment layer on the surface of the base material 14 on the pressure-sensitive adhesive layer 13 side.

  When the daylighting layer 2 is attached to the glass window 44, a part of the light L <b> 1 out of the sunlight L incident from the outside through the glass window 44 is transmitted through the transparent portion 9 and the floor portion 45 of the house 43. Proceed toward.

  On the other hand, among the sunlight L incident from the outside, the light L2 of the other part is incident on the transparent part 9, and then the gap 10 between the transparent parts 9 adjacent to each other in the vertical direction (more specifically, Reflected by the interface 6) between the non-adhesive portion 12 of the transparent portion 9 and the gap portion 10, it proceeds toward the ceiling portion 46 of the house 43.

  Therefore, according to the daylighting film 1, it can daylight efficiently and can improve the brightness of the whole house 43 efficiently.

  In such a daylighting film 1, as shown in FIG. 7, each of the plurality of transparent portions 9 has adhesiveness on at least one of the end faces in the thickness direction. More specifically, the adhesive portion 11 of the transparent portion 9 has adhesiveness on the second surface 11B.

  Therefore, the end face having the adhesiveness of the transparent portion 9 can be attached to the glass window 44 and the like, and thus the daylighting film 1 can be attached to the glass window 44. That is, the daylighting film 1 can be directly attached to the glass window 44 without providing a separate adhesive layer on the daylighting film 1. More specifically, since the transparent material 9 has an elastic material having transparency and tackiness extending throughout the thickness direction and the lateral direction of the daylighting layer 2, the transparent portion 9 has a thickness as in the case where a separate adhesive layer is provided. No interface is formed in the direction. For this reason, it is possible to suppress the formation of air bubbles between the daylighting layer 2 and the glass window 44 by the buffering of the interface.

  As a result, the material cost can be reduced while the daylighting film 1 can be easily attached to the glass window 44.

  Moreover, each of the plurality of transparent portions 9 and each of the plurality of gap portions 10 are arranged so as to be alternately continuous in the vertical direction, as shown in FIG. Therefore, when the bonding surface 2B of the lighting layer 2 (more specifically, the second surface 11B of the adhesive portion 11) is bonded to the glass window 44, the air positioned between the lighting layer 2 and the glass window 44 is It is removed from between the daylighting film 1 and the glass window 44 through the plurality of gaps 10.

  Therefore, it is possible to further reduce the formation of air bubbles between the daylighting film 1 and the glass window 44 and the formation of bubbles between them.

  Moreover, the support body 3 is supporting the some transparent part 9 collectively, as shown in FIG. 1 and FIG. Therefore, the space | gap part 10 can be reliably ensured between the transparent parts 9 adjacent to each other among the plurality of transparent parts 9. As shown in FIG. 7, when the daylighting film 1 is attached to the glass window 44, the air between the daylighting layer 2 and the glass window 44 can be surely escaped through the gap.

  Further, in a state where the daylighting film 1 is attached to the glass window 44, the sunlight L introduced from the outside to the inside can be reliably reflected at the interface 6 between the transparent portion 9 and the gap portion 10.

  That is, the gap 10 between the transparent portions 9 adjacent to each other can be used as a ventilation portion that can pass air and a reflection portion that reflects light. Therefore, it is not necessary to separately provide a member for reflecting light in the daylighting film 1, and the material cost can be further reduced.

  Further, since the support 3 is preferably a transparent adhesive tape capable of transmitting light, as shown in FIG. 7, the daylighting layer is in a state in which the plurality of transparent portions 9 are collectively supported by the support 3. Even if 2 is affixed on the glass window 44, it can suppress that the support body 3 inhibits the introduction | transduction of the sunlight L from the outdoors to the indoor.

  Moreover, since the transparent part 9 consists of a transparent adhesive, it can provide adhesiveness to all the exposed surfaces of the transparent part 9 with a simple structure. In addition, unlike the case where the transparent portion 9 is formed of an adhesive layer and a transparent layer, an interface is not formed in the transparent portion 9, and air entrainment can be reduced.

  In the first embodiment, the support 3 is attached to the daylighting layer 2 even after the daylighting layer 2 is attached to the glass window 44. However, the support 3 is not limited thereto. After the daylighting layer 2 is attached to the glass window 44, it can be peeled off from the daylighting layer 2.

  Moreover, in 1st Embodiment, although the lighting film 1 is provided with the peeling body 4, the lighting film 1 may be comprised only from the lighting layer 2 and the support body 3. FIG.

  Moreover, in 1st Embodiment, although the support body 3 is provided with the adhesive layer 13 and the base material 14, the support body 3 may be comprised only from the base material 14. FIG. In this case, the first surfaces 11 </ b> A of the plurality of adhesive portions 11 are bonded to the base material 14.

Moreover, in 1st Embodiment, although the adhesion part 11 consists of a transparent adhesive and each of 1st surface 11A-4th surface 11D of the adhesion part 11 has adhesiveness, it is limited to this. The adhesion part 11 should just have adhesiveness at least on the 2nd surface 11B. For example, the adhesive part 11 can be formed from a transparent resin material having no adhesiveness, and an adhesive layer can be provided on the second surface 11B of the adhesive part 11.
3. 2nd Embodiment Next, 2nd Embodiment of the optical film of this invention is described with reference to FIGS. In the second embodiment, the same reference numerals are given to the same members as those in the first embodiment, and the description thereof is omitted.

  In the first embodiment, as shown in FIG. 3, the daylighting film 1 includes a daylighting layer 2, a support 3 and a release body 4, and the daylighting layer 2 includes a plurality of transparent portions 9 and a plurality of gap portions 10. However, in the second embodiment, the daylighting film 1 includes the daylighting layer 49, the first peeling body 51, and the second peeling body 52, and the daylighting layer 49 includes a plurality of transparent portions as an example. An adhesive portion 11 and a plurality of porous portions 50 are provided.

  The daylighting layer 49 is sandwiched between the first peeled body 51 and the second peeled body 52 in the thickness direction of the daylighting film 1 and has a thin film shape extending in the vertical direction and the horizontal direction. One surface in the thickness direction of the daylighting layer 49 is a first pasting surface 49A that is pasted on the first peeling body 51. In the daylighting layer 49, the surface opposite to the first pasting surface 49A is the second side. It is the 2nd sticking surface 49B stuck on the peeling body 52. FIG.

  The plurality of adhesive portions 11 are arranged in parallel in the vertical direction with an interval (porous portion 50) therebetween. Each of the plurality of adhesive portions 11 can transmit light and has a substantially prismatic shape extending in the lateral direction. Each of the plurality of adhesive portions 11 extends over the entire thickness direction and lateral direction of the daylighting layer 49.

  The volume ratio of each of the plurality of adhesive portions 11 with respect to the daylighting layer 49 (volume per one adhesive portion 11 / volume of the daylighting layer 49 × 100) is, for example, 0.02% by volume or more, preferably 0.8. 1 volume% or more, for example, 1 volume% or less, preferably 0.5 volume% or less.

  The volume ratio of the plurality of adhesive portions 11 to the daylighting layer 49 (the sum of the volumes of the plurality of adhesive portions 11 / the volume of the daylighting layer 49 × 100) is, for example, 90% by volume or more, and preferably 95% by volume or more. For example, it is 99 volume% or less, Preferably, it is 98 volume% or less.

  Each of the plurality of porous portions 50 is disposed between the adjacent adhesive portions 11 among the plurality of adhesive portions 11. That is, each of the plurality of adhesive portions 11 and each of the plurality of porous portions 50 are arranged alternately and continuously in the vertical direction, and are bonded to each other.

  Each of the plurality of porous portions 50 can transmit light and has a substantially prismatic shape extending in the lateral direction. Each of the plurality of porous portions 50 extends over the entire thickness direction and lateral direction of the daylighting layer 49.

  Each of the plurality of porous portions 50 is made of a porous body having a plurality of continuous pores 60 as shown in FIG. The continuous pore 60 is a structure in which a plurality of pores communicate with each other in the porous portion 50. Thereby, the porous part 50 can pass air.

  Such a porous body is made of, for example, the above-described transparent foamed resin material, preferably made of foamed polyolefin, and more preferably made of foamed polyethylene.

  The porosity of the porous part 50 (ratio of pores in the porous part 50) is, for example, 10% by volume or more, preferably 30% by volume or more, for example, 90% by volume or less, preferably 80% by volume or less. . The porosity can be calculated by (bulk volume of porous part 50−resin material volume) / bulk volume of porous part 50 × 100.

  The longitudinal dimension of the porous portion 50 is, for example, 10 μm or more, preferably 80 μm or more, for example, 500 μm or less, preferably 120 μm or less.

  The ratio of the longitudinal dimension of the porous part 50 to the longitudinal dimension of the adhesive part 11 (the longitudinal dimension of the porous part 50 / the longitudinal dimension of the adhesive part 11) is, for example, 0.1 or more, preferably 0.3 or more, for example, 1.5 or less, preferably 1.0 or less, and more preferably 0.8 or less.

  The volume ratio of the sum of the plurality of porous portions 50 to the daylighting layer 49 (sum of the volumes of the plurality of porous portions 50 / volume of the daylighting layer 49 × 100) is, for example, 1% by volume or more, preferably 2% by volume or more, for example, 10% by volume or less, preferably 5% by volume or less.

  The first peeling body 51 is disposed on the first sticking surface 49 </ b> A of the daylighting layer 49, and is bonded to each first surface 11 </ b> A of the plurality of adhesive portions 11. The 1st peeling body 51 is a film which has flexibility, Comprising: The thing similar to the peeling body 4 etc. are mentioned, for example. Although not shown in the drawing, a release treatment layer is provided on the inner side surface (the surface on the daylighting layer 2 side) of the first release body 51. That is, each first surface 11 </ b> A of the plurality of adhesive portions 11 is bonded to a peeling treatment layer (not shown) of the first peeling body 51.

  The second peeled body 52 is disposed on the second sticking surface 49B of the daylighting layer 49, and is bonded to each second surface 11B of the plurality of adhesive portions 11. The 2nd peeling body 52 is a film which has flexibility, Comprising: The thing similar to the peeling body 4 etc. are mentioned, for example. Although not shown, a release treatment layer is provided on the inner side surface (the surface on the daylighting layer 2 side) of the second release body 52. That is, each 2nd surface 11B of the some adhesion part 11 is adhere | attached on the peeling process layer (not shown) of the 2nd peeling body 52. FIG.

  In order to manufacture such a daylighting film 1, for example, as shown in FIGS. 9 and 10, a plurality of unit films 54 including an adhesive layer 17 and a porous layer 53 are prepared.

  The porous layer 53 is attached to the upper surface of the adhesive layer 17. The porous layer 53 corresponds to the porous portion 50 and is made of a porous body. A commercial item can be used as such a porous layer 53, for example, Sunmap LC (made by Nitto Denko Corporation) etc. are mentioned.

  A separator 58 is preferably attached to the lower surface of the adhesive layer 17. Although not shown, a release treatment layer is provided on the upper surface of the separator 58.

  And as a method of preparing a plurality of unit films 54, the same method as the method of preparing a plurality of unit films 16 is mentioned, for example.

  In such a method, preferably, the porous layer 53 is attached to the upper surface of the adhesive layer 17 and the separator 58 is attached to the lower surface of the adhesive layer 17 so as to be long and flat as shown in FIG. There is a method in which, after the belt-shaped processed sheet 59 is prepared, the processed sheet 59 is wound into a roll shape, and a plurality of unit films 54 are cut out from a portion drawn from the roll-shaped processed sheet 59.

  The number of unit films 54 is the same as the number of unit films 16, for example.

  The shape of the unit film 54 is not particularly limited, but is preferably circular when viewed from the thickness direction. Hereinafter, a case where the unit film 54 has a circular shape from the thickness direction will be described.

  Next, as shown in FIG. 9, after separating the separator 58 from the adhesive layer 17, a plurality of unit films 54 are laminated without sandwiching the adhesive layer to prepare a laminate 55. Here, in the stacked body 55, the adhesive layer 17 and the porous layer 53 that are adjacent to each other in the stacking direction are bonded to each other due to the adhesiveness of the adhesive layer 17.

  Thereby, in the laminated body 55, the pattern which consists of the adhesion layer 17 and the porous layer 53 is repeatedly arrange | positioned sequentially in the lamination direction.

  In FIG. 10, for convenience, the number of each of the adhesive layer 17 and the porous layer 53 is omitted, and the laminate 55 is composed of six each of the adhesive layer 17 and the porous layer 53. In practice, the laminate 55 has, for example, 100 to 30000, preferably 300 to 5000, and more preferably 400, each of the adhesive layer 17 and the porous layer 53. It is formed by stacking up to 600 sheets.

  The height (the length in the stacking direction) of the stacked body 55 is the same as the height of the stacked body 20, for example.

  Next, the laminated body 55 is subjected to thermocompression bonding (heating press) as necessary. More specifically, the laminate 55 is pressed from, for example, 0.1 MPa to 50 MPa from both sides in the lamination direction, and heated to 30 ° C. to 180 ° C. In addition, the time of thermocompression bonding is 1 minute-60 minutes, for example.

  Next, in the same manner as in the first embodiment, after the first release body 51 is attached to the side surface 56 of the stacked body 55 along the stacking direction, the side layer 57 of the stacked body 55 is bonded to the plurality of adhesive layers 17. Each of the plurality of porous layers 53 is alternately cut in parallel in the stacking direction.

  More specifically, after affixing the 1st peeling body 51 to the side surface 56 of the laminated body 55, while arrange | positioning the cutting blade 34 along a lamination direction, the laminated body 55 is rotated centering on the axis line. Then, the side layer 57 is cut out from the laminated body 55 like a wig.

  Thereafter, in the daylighting layer 2, the second peeled body 52 is attached to the surface opposite to the first peeled body 51.

  By the above, the lighting film 1 provided with the lighting layer 2, the 1st peeling body 51, and the 2nd peeling body 52 is prepared.

  Such a daylighting film 1 is preferably manufactured continuously by the manufacturing unit 28 from the viewpoint of productivity. In this case, the first peeling body 51 is wound around the rotary shaft 32 such that the peeling treatment layer (not shown) is radially inward of the rotation shaft 32, and the peeling treatment layer ( The second peeled body 52 is wound so that (not shown) is on the radially outer side of the rotating shaft 38, and the stacked body 55 is held by the pair of holding members 33.

  And the manufacturing unit 28 operate | moves similarly to 1st Embodiment, and the long and flat strip-shaped lighting film 1 is manufactured.

  As shown in FIG. 11, for example, in order to attach the thus-produced daylighting film 1 to the inner surface of the glass window 44, first, either one of the first peeling body 51 and the second peeling body 52 is attached. Then, it peels off from the daylighting layer 49 and either one of the first sticking surface 49A and the second sticking surface 49B, more specifically, one of the first surface 11A and the second surface 11B of the adhesive portion 11. To expose.

  Then, one of the exposed first surface 11 </ b> A and second surface 11 </ b> B is attached to the inner surface of the glass window 44. Thereafter, the daylighting layer 49 is pressed toward the glass window 44 from the inside of the house 43 through the other one of the first peeling body 51 and the second peeling body 52 by, for example, a hand roller.

  Then, the air positioned between the daylighting layer 49 and the inner surface of the glass window 44 passes through the continuous pores 60 of the plurality of porous layers 53 and is removed from between the daylighting layer 49 and the glass window 44. . Thereafter, the other of the first peeled body 51 and the second peeled body 52 is peeled from the daylighting layer 49.

  In addition, the support body 3 can also be provided in the one side of the lighting film 1 (lighting layer 49) as needed.

  As described above, only the daylighting layer 49 is attached to the inner side surface of the glass window 44.

  And when the daylighting layer 49 is attached to the glass window 44, a part of the light L 1 out of the sunlight L incident from the outside through the glass window 44 is transmitted through the adhesive portion 11, and the floor of the house 43. It progresses toward the part 45.

  On the other hand, among the sunlight L incident from the outside, the light L2 of the other part is incident on the porous part 50 and then scattered by being reflected by the continuous pores 60 in the porous part 50, so that the house 43 Introduced in.

  According to the second embodiment, as shown in FIG. 11, when the daylighting layer 49 is attached to the glass window 44, the air between the daylighting layer 49 and the glass window 44 is changed into the porous continuous pores 60. Can be surely escaped.

  Further, in a state where the daylighting film 1 is attached to the glass window 44, the sunlight L introduced indoors from the outdoors can be reliably reflected and scattered by the continuous pores 60.

  That is, the porous part 50 having a plurality of continuous pores 60 can be used as a ventilation part that can pass air, a reflection part that reflects light, and a light scattering part that scatters light.

  Therefore, in the daylighting film 1 (daylighting layer 2), it is not necessary to separately provide a reflection part for reflecting light and a light scattering part for scattering light, and the material cost can be further reduced.

  Moreover, in 2nd Embodiment, although the lighting film 1 is provided with the lighting layer 2, the 1st peeling body 51, and the 2nd peeling body 52, as shown in FIG. 11 and the porous portion 50 are bonded to each other, and therefore the first peeled body 51 and the second peeled body 52 may not be provided. That is, the daylighting film 1 may be composed of only the daylighting layer 2. In this case, the material cost can be further reduced.

  Moreover, the lighting film 1 of 2nd Embodiment can be provided with the support body 3 instead of the 1st peeling body 51 or the 2nd peeling body 52. FIG.

Also in such 2nd Embodiment and its modification, there can exist an effect similar to above-described 1st Embodiment.
3. Third Embodiment Next, a third embodiment of the optical film of the present invention will be described with reference to FIG.

  Each of the first embodiment, the second embodiment, and the modifications can be combined as appropriate.

  For example, in the third embodiment, the daylighting film 1 includes the daylighting layer 2, the first peeling body 51, and the second peeling body 52.

  The daylighting layer 2 is sandwiched between the first peeling body 51 and the second peeling body 52, the first peeling body 51 is disposed on the support surface 2 </ b> A of the daylighting layer 2, and the second peeling body 52 is the daylighting layer 2. Is disposed on the sticking surface 2B.

  The daylighting film 1 according to the third embodiment can be manufactured by the same method as that of the first embodiment, and is used by being attached to the glass window 44 of the house 43, for example.

Therefore, the same operational effects as those of the first embodiment and the second embodiment can be achieved.
4). Next, the laminated glass of the present invention will be described with reference to FIGS. 13A to 13C. In the following description of the laminated glass, the same reference numerals are given to the same members as those in the first to third embodiments of the daylighting film, and the description thereof is omitted.

  The daylighting film 1 according to the first embodiment to the third embodiment is a product that is distributed and industrially available, and the daylighting layer 2 is attached to the inner surface of the glass window 44 by an operator, for example. Used.

  However, the present invention is not limited to this, and the daylighting film can be configured as one component of the laminated glass 65, for example.

  Specifically, the laminated glass 65 includes a daylighting layer 2 as an example of a daylighting film and a pair of glass members 62 arranged so as to sandwich the daylighting layer 2 in the thickness direction, as shown in FIG. 13C. ing. Each of the pair of glass members 62 is made of known glass, for example.

  In order to manufacture such a laminated glass 65, first, the lighting film 1 shown in FIG. 12 is prepared. In the laminated glass 65, only the daylighting layer 2 corresponds as an example of the daylighting film. Therefore, in the following description, the daylighting film 1 shown in FIG.

  Next, as shown in FIG. 13A, the first release body 51 is peeled from the daylighting layer 2 of the preparation film 63, and the supporting surface 2 </ b> A of the daylighting layer 2, more specifically, each of the plurality of adhesive portions 11. One surface 11A is exposed.

  And one glass member is attached so that the 1st surface 11A of the adhesion part 11 may adhere | attach the daylighting layer 2 supported by the 2nd peeling body 52 directly on one glass member 62 among a pair of glass members 62. Paste to 62. Accordingly, the daylighting layer 2 is supported by the one glass member 62.

  Next, as shown in FIG. 13B, the second peeled body 52 is peeled off from the daylighting layer 2, and more specifically, the attachment surface 2 </ b> B of the daylighting layer 2, more specifically, the second surfaces 11 </ b> B of the plurality of adhesive portions 11. To expose.

  Then, the second glass member is arranged such that the second surface 11B of the adhesive portion 11 is directly bonded to the other glass member 62 of the pair of glass members 62 with respect to the daylighting layer 2 supported by the one glass member 62. Paste to 62.

  At this time, the air located between the sticking surface 2B of the daylighting layer 2 and the other glass member 62 passes through the plurality of gaps 10 and is discharged from the lateral end of the daylighting layer 2, for example. The Thereby, air is removed from between the daylighting layer 2 and the glass member 62.

  And since such a laminated glass 65 is equipped with the daylighting layer 2, as shown in FIG. 7, while it can light efficiently and can aim at reduction of material cost, It is possible to suppress the formation of bubbles between the glass member 62.

  In the laminated glass 65, only the daylighting layer 2 is sandwiched between the pair of glass members 62. However, the present invention is not limited to this. For example, the daylighting film 1 including the daylighting layer 2 and the support 3 is a pair. It may be sandwiched between the glass members 62.

  The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to them. Specific numerical values such as blending ratio (content ratio), physical property values, and parameters used in the following description are described in the above-mentioned “Mode for Carrying Out the Invention”, and the corresponding blending ratio (content ratio) ), Physical property values, parameters, etc. The upper limit value (numerical value defined as “less than” or “less than”) or lower limit value (number defined as “greater than” or “exceeded”) may be substituted. it can.

Example 1
Double-sided adhesive tape with no base material (adhesive layer, manufactured by Nitto Denko Corporation, trade name: Luciax CS9897T, thickness: 175 μm) , Thickness: 25 μm) were bonded one by one to prepare a processed sheet. Next, the processed sheet was punched into a circular shape with a diameter of 25 cm to produce 500 circular unit films.

  Next, 500 unit films were laminated without using an adhesive between the unit films to obtain a non-adhesive laminate. The laminate was held in a cylindrical shape by applying pressure (5 MPa) from both sides in the lamination direction. The laminate had a diameter of 25 cm × a height (a length in the lamination direction) of 112 mm.

  Next, the laminate, the transparent support (support), and the release liner (release) were set in the production unit 28 shown in FIG.

  Specifically, the laminate was held by a pair of holding members 33 so as to be sandwiched from both sides in the lamination direction. At this time, the pair of holding members 33 sandwiched the stacked body from both sides in the stacking direction with the pressure (5 MPa).

  The transparent support was wound around the rotary shaft 32 to constitute a support roll, and the release liner was wound around the rotary shaft 38 to constitute a peeler roll.

  The transparent support had a polypropylene film (base material) having a thickness of 40 μm and an acrylic pressure-sensitive adhesive layer (adhesion layer) having a thickness of 30 μm. The acrylic pressure-sensitive adhesive layer was formed on one side of the polypropylene film, and a release treatment layer with a release treatment agent was provided on the other side of the polypropylene film.

  Further, in a state where the laminated body is held by the pair of holding members 33, the tip of the cutting blade 34 is in contact with the side surface of the laminated body. In addition, the cutting blade 34 was arrange | positioned along the lamination direction of a laminated body.

  Then, the support pulled out from the support roll is drawn toward the tangential direction of the laminate so that the adhesive layer adheres to the side of the laminate, and is placed on the side of the laminate in the range of the central angle of 240 ° in the laminate. Pasted.

  Subsequently, the pair of holding members 33 was driven to rotate counterclockwise by a motor (not shown) of the cutting device 29 as viewed from one axial direction of the holding member 33 (front side in FIG. 8). .

  Then, the laminated body held by the pair of holding members 33 was rotated about the axis, and the support roll was driven about the axis of the rotary shaft 32.

  Thereby, the side layer of the laminated body to which the support body was affixed was continuously cut out like a wig, and the lighting layer (side layer of the laminated body) supported by the transparent support body was obtained.

  Next, the release liner was pulled out from the release body roll, and the release liner was attached to the surface (cut surface) opposite to the transparent support in the daylighting layer.

  As described above, a long and flat strip-shaped daylight film including a daylighting layer, a transparent support, and a release liner was prepared, and the daylighting film was wound around the winding shaft 39.

  The daylighting layer of the daylighting film has a plurality of transparent portions and a plurality of gap portions, and the plurality of transparent portions and the plurality of gap portions are continuous so as to alternate with each other in the stacking direction (vertical direction of the daylighting layer). Was arranged. The daylighting layer had a thickness of 200 μm.

  And the lighting film was suitably cut according to the dimension of the glass window stuck. Thereafter, the release liner is peeled off from the daylighting layer, and the exposed daylighting layer is attached to the inner side surface of the glass window 44 as shown in FIG. 7, and the daylighting layer is passed through the transparent support by a hand roller. , Pressed toward the glass window 44. Then, it was confirmed that no bubbles were formed between the daylighting layer and the glass window 44.

Example 2
Double-sided pressure-sensitive adhesive tape (adhesive layer, manufactured by Nitto Denko Corporation, trade name: Luciax CS9897T, thickness: 175 μm), one side of the foamed polyethylene film (porous layer, manufactured by Nitto Denko Corporation, trade name: Sunmap LC, thickness: 100 μm) ) Were bonded together by roll-to-roll to prepare a processed sheet. In addition, the separator was provided in the other surface of the double-sided adhesive tape.

  Next, the processed sheet was punched into a circular shape with a diameter of 25 cm to produce 500 circular unit films.

  Then, after peeling a separator from a double-sided adhesive tape, the unit film was laminated | stacked without using an adhesive agent between each unit film, and the laminated body was obtained. The laminate had a diameter of 25 cm × a height (a length in the lamination direction) of 137 mm.

  Next, in the same manner as in Example 1, the laminate, the transparent support (support), and the release liner (release) were set in the production unit 28 shown in FIG. A long and flat strip-shaped daylighting film including a transparent support and a release liner was prepared.

  The daylighting layer of the daylighting film has a plurality of transparent portions and a plurality of porous portions, and the plurality of transparent portions and the plurality of porous portions alternate with each other in the stacking direction (longitudinal direction of the daylighting layer). It was arranged continuously. The daylighting layer had a thickness of 200 μm.

  And the lighting film was suitably cut according to the dimension of the glass window stuck. Thereafter, the release liner is peeled off from the daylighting layer, and the exposed daylighting layer is attached to the inner surface of the glass window 44, as shown in FIG. 11, and the daylighting layer is passed through the transparent support by a hand roller. , Pressed toward the glass window 44. Then, it was confirmed that no bubbles were formed between the daylighting layer and the glass window 44.

Example 3
Except having changed the transparent support body (support body) into the release liner (1st release body), it is equipped with the lighting layer and a pair of release liner which pinches | interposes a lighting layer similarly to Example 1, and is long. A flat strip-shaped daylighting film was prepared.

  And the lighting film was suitably cut according to the dimension of the laminated glass. Thereafter, one release liner of the pair of release liners was peeled from the daylighting layer.

  And after sticking the exposed lighting layer so that it might adhere directly to a glass member, the other peeling liner was peeled from the lighting layer. Thereby, the lighting layer supported by the glass member was obtained.

  Next, the daylighting layer supported by the glass member was attached to another glass member. Thus, a laminated glass in which the daylighting layer was sandwiched between a pair of glass members was prepared. And in the laminated glass, it confirmed that the bubble was not formed between the lighting layer and each of a pair of glass member.

DESCRIPTION OF SYMBOLS 1 Daylighting film 3 Support body 9 Transparent part 10 Cavity part 50 Porous part 62 Glass member 65 Laminated glass

Claims (6)

A daylighting film configured to transmit light and reflect light,
A plurality of transparent parts capable of transmitting light;
A plurality of ventilation parts through which air can pass,
Each of the plurality of transparent portions and each of the plurality of ventilation portions are arranged so as to continue alternately in an orthogonal direction orthogonal to the thickness direction of the daylighting film,
Each of these transparent parts has adhesiveness in at least one among the both end surfaces of the said thickness direction, The lighting film characterized by the above-mentioned. Each of the plurality of transparent portions has adhesiveness at both end surfaces in the thickness direction,
The daylighting film is attached to the other end surface of the plurality of transparent portions, and includes a support body that collectively supports them,
2. The daylighting film according to claim 1, wherein each of the plurality of ventilation portions is a gap between adjacent ones of the plurality of transparent portions.   The daylighting film according to claim 2, wherein the support is a transparent adhesive tape capable of transmitting light. Each of the plurality of ventilation portions is made of a porous body having a plurality of continuous pores,
Each of the plurality of transparent portions has adhesiveness at both end surfaces in the orthogonal direction,
The daylighting film according to claim 1, wherein each of the plurality of transparent portions and each of the plurality of ventilation portions are bonded to each other.   Each of these transparent parts consists of a transparent adhesive, The lighting film as described in any one of Claims 1-4 characterized by the above-mentioned. The daylighting film according to any one of claims 1 to 5,
A pair of glass members arranged to sandwich the daylighting film in the thickness direction,
The laminated glass, wherein the plurality of transparent portions are directly bonded to at least one of the pair of glass members.

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