WO2012128109A1 - 熱線反射フィルム、その製造方法、及び熱線反射体 - Google Patents
熱線反射フィルム、その製造方法、及び熱線反射体 Download PDFInfo
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- WO2012128109A1 WO2012128109A1 PCT/JP2012/056322 JP2012056322W WO2012128109A1 WO 2012128109 A1 WO2012128109 A1 WO 2012128109A1 JP 2012056322 W JP2012056322 W JP 2012056322W WO 2012128109 A1 WO2012128109 A1 WO 2012128109A1
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- BPVKTQRLRAVYEX-UHFFFAOYSA-K triiodozirconium Chemical compound [Zr+3].[I-].[I-].[I-] BPVKTQRLRAVYEX-UHFFFAOYSA-K 0.000 description 1
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical compound [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
- IIBYPFWXQQDGFC-UHFFFAOYSA-N trimethyl-[2-(2-methylprop-2-enoylamino)propyl]azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC(C)NC(=O)C(C)=C IIBYPFWXQQDGFC-UHFFFAOYSA-N 0.000 description 1
- LMRVIBGXKPAZLP-UHFFFAOYSA-N trimethyl-[2-methyl-2-(prop-2-enoylamino)propyl]azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC(C)(C)NC(=O)C=C LMRVIBGXKPAZLP-UHFFFAOYSA-N 0.000 description 1
- GHVWODLSARFZKM-UHFFFAOYSA-N trimethyl-[3-methyl-3-(prop-2-enoylamino)butyl]azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CCC(C)(C)NC(=O)C=C GHVWODLSARFZKM-UHFFFAOYSA-N 0.000 description 1
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- 229910000166 zirconium phosphate Inorganic materials 0.000 description 1
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 description 1
- OMQSJNWFFJOIMO-UHFFFAOYSA-J zirconium tetrafluoride Chemical compound F[Zr](F)(F)F OMQSJNWFFJOIMO-UHFFFAOYSA-J 0.000 description 1
- YRDBVAQLYFVSFE-UHFFFAOYSA-K zirconium(3+);tribromide Chemical compound [Br-].[Br-].[Br-].[Zr+3] YRDBVAQLYFVSFE-UHFFFAOYSA-K 0.000 description 1
- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 description 1
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical compound [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 description 1
- PFXYQVJESZAMSV-UHFFFAOYSA-K zirconium(iii) chloride Chemical compound Cl[Zr](Cl)Cl PFXYQVJESZAMSV-UHFFFAOYSA-K 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0808—Mirrors having a single reflecting layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/085—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/281—Interference filters designed for the infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/281—Interference filters designed for the infrared light
- G02B5/282—Interference filters designed for the infrared light reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
Definitions
- the present invention relates to a heat ray reflective film, a method for producing the same, and a heat ray reflector provided with the heat ray reflective film.
- the light emitted from the sun has a wide spectrum from the ultraviolet region to the infrared light region.
- Visible light has a wavelength range of 380 to 780 nm ranging from purple to yellow to red light, and occupies about 45% of sunlight.
- infrared light those close to visible light are called near-infrared rays (wavelength 780 to 2500 nm), and more than that is called mid-infrared rays, accounting for about 50% of sunlight.
- the intensity of light energy in this region is as small as about one-tenth or less compared with ultraviolet light, but the thermal effect is large, and when absorbed by a substance, it is released as heat, resulting in an increase in temperature. For this reason, it is also called a heat ray, and by blocking these rays, the temperature rise in the room can be suppressed. Moreover, it can also suppress that the heating heat of the winter of a cold region dissipates outside.
- the low refractive index layer and the high refractive index layer are alternately laminated by repeatedly applying and drying and curing, so that the interface between the layers is clear and the bonding force between the layers is weak, so that a strong peeling force is obtained. In such a case, there is a problem in that peeling of the film between layers occurs.
- the present invention has been made in view of the above-mentioned problems and situations, and the solution is to have high heat ray reflectivity, good film attachment (peeling resistance), large area, and identification of the visible light range. It is providing the heat ray reflective film in which the reflected light of this is not conspicuous, and its manufacturing method. Moreover, it is providing the heat ray reflector provided with the said heat ray reflective film.
- the interface between most of the laminated layers is clear.
- the cause of this problem is that the force is concentrated between the layers. Therefore, it has been found that the resistance to peeling is improved by concentrating the force not in the layer but in the layer.
- the layer thickness film thickness
- the layer having a large layer thickness film thickness
- a heat ray reflective film having at least one heat ray reflection unit configured by laminating at least six refractive index layers different from adjacent layers on one surface on a support, the heat ray reflecting film The heat ray reflective film in which the layer thickness of the layer closest to the support of any one of the units is at least three times the layer thickness of the layer farthest from the support.
- the layer thickness of an adjacent layer of the first unit closest to the support in the first unit is 3 times or more the layer thickness of the layer farthest from the support.
- the heat ray reflective film as described in 2.
- the mixed region having a thickness in the range of 0.4 to 0.8 times the layer thickness of the layer farthest from the support is provided between adjacent layers of the layers constituting the first unit. Or 2.
- a mixing region having a thickness in the range of 0.1 to 0.4 times the thickness of the layer farthest from the support, between two heat ray reflecting units adjacent to the first unit; 1. ⁇ 3.
- the heat ray reflective film as described in any one of these.
- a heat ray reflective film having a high heat ray reflectivity, good film attachment (peeling resistance), capable of increasing the area, and in which specific reflected light in the visible light region is not conspicuous, and a method for producing the same. can do.
- the heat ray reflector provided with the said heat ray reflective film can be provided.
- FIG. 2 shows an example of a layer structure in which the mixing region in the unit is 0.4 to 0.8 times the layer thickness of the layer farthest from the support. It is a schematic cross section which shows an example in case the number of the heat ray reflective units which concerns on this invention is two.
- the mixing region in the unit is 0.4 to 0.8 times the layer thickness of the layer farthest from the support.
- FIG. 4 shows an example in case the number of the heat ray reflective units which concerns on this invention is two.
- the mixing area in the unit is 0.4 to 0.8 times the layer thickness of the layer farthest from the support, and the layer thickness of the layer in which the mixing area between the units is the farthest from the support. Is 0.1 to 0.4 times.
- the heat ray reflective film of the present invention has at least one heat ray reflective unit comprising at least six refractive index layers different in layer from the adjacent layers on one surface on a support.
- the layer thickness of the layer closest to the support of the first unit of any one of the heat ray reflective units is three times the layer thickness of the layer farthest from the support That's it.
- the layer thickness of the adjacent layer of the first unit closest to the support is that of the layer farthest from the support.
- the layer thickness is preferably 3 times or more.
- mixing between adjacent layers of the layers constituting the first unit with a thickness in the range of 0.4 to 0.8 times the layer thickness of the layer farthest from the support in the heat ray reflective unit It is preferable to have a region.
- the thickness of the layer farthest from the support in the heat ray reflecting unit is within a range of 0.1 to 0.4 times. It is also preferable to have a mixed region of thickness.
- the production method of the heat ray reflective film of the present invention is preferably a production method of an embodiment having a step of forming a layer constituting the heat ray reflective film using an aqueous coating solution.
- the heat ray reflective film of the present invention can be suitably used for various heat ray reflectors.
- ⁇ is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value.
- the support also referred to as “base material”
- base material is not particularly limited as long as it is formed of a transparent organic material.
- methacrylic acid ester polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyarylate, polystyrene (PS), aromatic polyamide, polyether ether ketone, polysulfone, polyether sulfone, polyimide, poly
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PC polycarbonate
- PS polyarylate
- PS polystyrene
- PS polyamide
- polyether ether ketone polysulfone
- polyether sulfone polyimide
- poly Examples include resin films such as ether imide, and resin films formed by laminating two or more layers of the above resins. From the viewpoint of cost and availability, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC) and the like are preferably used.
- the thickness of the support is preferably about 5 to 200 ⁇ m, more preferably 15 to 150 ⁇ m.
- the support according to the present invention has a visible light region transmittance of 85% or more, particularly 90% or more, as shown in JIS R3106-1998.
- the support has a transmittance equal to or higher than the above-mentioned transmittance, it is advantageous and preferable for increasing the transmittance in the visible light region shown in JIS R3106-1998 when it is used as a heat ray reflective film to 50% or more.
- the support using the above resin or the like may be an unstretched film or a stretched film.
- a stretched film is preferable from the viewpoint of strength improvement and thermal expansion suppression.
- the support used in the present invention can be produced by a conventionally known general method.
- an unstretched support that is substantially amorphous and not oriented can be produced by melting a resin as a material with an extruder, extruding it with an annular die or a T-die, and quenching.
- the unstretched support is uniaxially stretched, tenter-type sequential biaxial stretching, tenter-type simultaneous biaxial stretching, tubular-type simultaneous biaxial stretching, and other known methods, such as the flow (vertical axis) direction of the support, or
- a stretched support can be produced by stretching in the direction perpendicular to the flow direction of the support (horizontal axis).
- the draw ratio in this case can be appropriately selected according to the resin as the raw material of the support, but is preferably 2 to 10 times in the vertical axis direction and the horizontal axis direction.
- the support used in the present invention may be subjected to relaxation treatment or off-line heat treatment in terms of dimensional stability.
- the relaxation treatment is performed in a process from the heat setting in the stretching process of the polyester film to the winding in the transversely stretched tenter or after exiting the tenter.
- the relaxation treatment is preferably performed at a treatment temperature of 80 to 200 ° C., more preferably a treatment temperature of 100 to 180 ° C.
- the relaxation rate is preferably in the range of 0.1 to 10% in both the longitudinal direction and the width direction, and more preferably, the relaxation rate is 2 to 6%.
- the relaxed support is subjected to the following off-line heat treatment to improve heat resistance and to improve dimensional stability.
- the support according to the present invention is preferably coated with an undercoat layer coating solution in-line on one or both sides in the film forming process.
- undercoating during the film forming process is referred to as in-line undercoating.
- resins used in the undercoat layer coating solution useful in the present invention include polyester resins, acrylic-modified polyester resins, polyurethane resins, acrylic resins, vinyl resins, vinylidene chloride resins, polyethyleneimine vinylidene resins, polyethyleneimine resins, and polyvinyl alcohol resins. , Modified polyvinyl alcohol resin, gelatin and the like, and any of them can be preferably used.
- a conventionally well-known additive can also be added to these undercoat layers.
- the undercoat layer can be coated by a known method such as roll coating, gravure coating, knife coating, dip coating or spray coating.
- the coating amount of the undercoat layer is preferably about 0.01 to 2 g / m 2 (dry state).
- the heat ray reflective film of the present invention has at least one heat ray reflective unit constituted by laminating at least 6 refractive index layers different from layers adjacent to each other on one surface on a support.
- the layer thickness of the layer closest to the support of any one of the heat ray reflective units is at least three times the layer thickness of the layer farthest from the support.
- the layer thickness of the layer closest to the support is preferably 3.5 times or more, more preferably 3.8 times or more, more preferably 4 times or more the layer thickness of the layer farthest from the support. Particularly preferably, it is 4.5 times or more, most preferably 5 times or more.
- the layer thickness of the layer closest to the support is three times or more the layer thickness of the layer farthest from the support.
- a unit that satisfies this condition is also referred to as a “first unit”.
- the unit (1st unit) which has the layer used as the said range should just be contained in the unit which comprises a heat ray reflective film, and multiple may be contained.
- the other heat ray reflective unit may be formed in the both sides (or one side) of the 1st unit, and it may be formed away from the support body. .
- the layer thickness of the layer closest to the support is preferably 350 to 1000 nm, more preferably 400 to 800 nm.
- the layer thickness of the layer farthest from the support is preferably 60 to 200 nm, more preferably 80 to 180 nm.
- the layer thickness of the adjacent layer of the layer closest to the support of any one unit (first unit) of the heat ray reflective units is the layer farthest from the support.
- the aspect which is 2 times or more of this layer thickness is preferable, the aspect which is 3 times or more is more preferable, and the aspect which is 3.3 times or more is further more preferable.
- the layer thickness of the adjacent layer closest to the support is preferably 60 to 500 nm, more preferably 100 to 450 nm.
- the layer thicknesses of the other layers constituting the unit are preferably 60 to 500 nm, more preferably 100 to 450 nm.
- the thickness of the layer farthest from the support in the heat ray reflecting unit is within a range of 0.4 to 0.8 times.
- the mixed region is more preferably in the range of 0.4 to 0.7 times the layer thickness of the layer farthest from the support.
- the layer thickness of the layer farthest from the support of the heat ray reflection unit (first unit) is preferably 0.1 times or more between two heat ray reflection units adjacent to the first unit. It is preferable that the mixed region has a thickness of less than twice, more preferably 0.1 to 0.9 times, and still more preferably 0.1 to 0.4 times. It is preferable to set the mixed region between the units within the above range because the heat ray integrated reflectance is increased and the peak of the sideband appearing in the visible light wavelength region becomes broad even when the film thickness varies.
- the mixed region between the units within the above range may exist only in one of the adjacent layers of the first unit constituting the heat ray reflective film, or may exist on both sides.
- the heat ray reflective unit of the present invention is constituted by laminating at least six refractive index layers different from those of adjacent layers.
- the “refractive index layer different from the adjacent layer” means that the refractive index of the refractive index layer is different from the refractive index of the adjacent layer (adjacent layer).
- the refractive index layers satisfying the relationship are alternately laminated.
- a layer having a relatively high refractive index is referred to as a “high refractive index layer”
- a layer having a relatively low refractive index is referred to as a “low refractive index layer”. It will be called “layer”.
- the layer when the refractive index layers stacked alternately have a high refractive index relative to the adjacent layer, the layer is a high refractive index layer, and when the refractive index is low relative to the adjacent layer, the layer is a low refractive index. This is called the rate layer.
- a high refractive index layer and a low refractive index layer are alternately laminated.
- FIG. 1 shows a heat ray reflective film in which a low refractive index layer 1 and a high refractive index layer 2 are alternately laminated in a heat ray reflective unit (first unit) 4 in a conventional heat ray reflective unit.
- the low refractive index layer 1 and the high refractive index layer 2 are alternately stacked in the heat ray reflective unit (first unit) 4, which is an embodiment of the present invention, and the low refractive index is reduced.
- a heat ray reflective film having a mixed region 3 between the refractive index layer and the high refractive index layer is shown.
- FIG. 3 shows a heat ray reflective film having two heat ray reflective units in which a heat ray reflective unit (unit adjacent to the first unit) 5 is formed on the heat ray reflective unit (first unit) 4. Has been.
- FIG. 4 shows a heat ray reflective film having two heat ray reflective units in which a heat ray reflective unit (unit adjacent to the first unit) 5 is formed on the heat ray reflective unit (first unit) 4.
- a heat-reflective film having a mixing area 6 between units is shown.
- the “mixed region” refers to the components of the coating liquid (high refractive index material and low refractive index material) when the high refractive index layer coating liquid and the low refractive index layer coating liquid are applied simultaneously in multiple layers.
- the high refractive index material and the low refractive index material are mixed in the interface, and the unevenness is in the region where the refractive index changes continuously, or in the interface between the high refractive index layer and the low refractive index layer.
- This is a region where the refractive index continuously changes when viewed in the width direction.
- This region can be widened by shortening the cooling (chill) setting time or increasing the cooling temperature.
- the film surface temperature of the coating film is preferably 0 to 20 ° C. More preferably, the cooling (chill) setting is performed at 0 to 15 ° C., preferably 10 seconds to 10 minutes, more preferably 30 seconds to 5 minutes, and then preferably 40 to 90 ° C., more preferably 45 to By drying at 80 ° C., preferably for 30 seconds to 30 minutes, more preferably for 45 seconds to 5 minutes, a mixed region having a desired thickness can be adjusted.
- a high refractive index layer coating liquid and a low refractive index layer coating liquid are further coated with a coater to form a multilayer multilayer, and then the film surface temperature of the coating film is preferably 0 to 20 ° C.
- the cooling (chill) setting is preferably performed at 0 to 15 ° C., preferably 10 seconds to 10 minutes, more preferably 30 seconds to 3 minutes, and then preferably 40 to 90 ° C., more preferably 45 to 80 ° C.
- it is possible to adjust the mixed region having a desired thickness by drying preferably 30 seconds to 30 minutes, more preferably 45 seconds to 5 minutes.
- the “low refractive index layer” in the case of having a mixed region means that the other end from the center (a portion exceeding 50%) in the direction parallel to the support in the mixed region at one end of the low refractive index layer. To the center in the direction parallel to the support in the mixed region (less than 50%).
- the “high refractive index layer” in the case of having a mixed region refers to the other end from the center (a portion exceeding 50%) in the direction parallel to the support in the mixed region at one end of the high refractive index layer. To the center in the direction parallel to the support in the mixed region (less than 50%).
- the "layer thickness closest to the support” and the “layer thickness farthest from the support” Center in the direction parallel to the support in the mixing region at one end of the layer (more than 50%) to the center in the direction parallel to the support in the mixing region at the other end (less than 50%) ).
- the thickness of each layer is also the same as the support in the mixed region at the other end from the center in the direction parallel to the support in the mixed region at one end of the refractive index layer (part exceeding 50%). To the center in the parallel direction (less than 50%).
- the refractive index profile includes, for example, titanium oxide as a high refractive index material in the high refractive index layer.
- the low refractive index layer contains, for example, silicon oxide as a low refractive index material, it can be known by measuring the metal oxide concentration profile in the layer thickness direction in these laminated films.
- the refractive index can be converted by the composition from the metal oxide concentration profile in the layer thickness direction of the laminate.
- the metal oxide concentration profile of the stacked layer is obtained by etching from the surface to the depth direction using a sputtering method, using an XPS surface analysis apparatus, setting the outermost surface as 0 nm, and sputtering at a rate of 0.5 nm / min. It can be observed by measuring the composition ratio. It is also possible to see the cut surface by cutting the laminate and measuring the atomic composition ratio with an XPS surface analyzer.
- the concentration of the metal oxide changes discontinuously in the mixed region, the boundary can be determined by a tomographic photograph using an electron microscope (TEM).
- the XPS surface analyzer is not particularly limited, and any model can be used. However, in the present invention, ESCALAB-200R manufactured by VG Scientific, Inc. was used. Mg was used for the X-ray anode, and measurement was performed at an output of 600 W (acceleration voltage: 15 kV, emission current: 40 mA).
- it is a unit comprised from 6 or more layers by which the high refractive index layer and the low refractive index layer were laminated
- the difference in refractive index between the adjacent high refractive index layer and low refractive index layer is preferably 0.1 or more. Especially preferably, it is 0.3 or more, More preferably, it is 0.4 or more.
- the number of units depends on the refractive index difference between the high refractive index layer and the low refractive index layer, but is preferably 40 units or less, more preferably 20 units or less, and even more preferably 10 units or less. It is.
- the refractive indexes of the high refractive index layer and the low refractive index layer can be determined according to the following method.
- each refractive index layer for measuring the refractive index is coated as a single layer on a substrate is prepared, and the sample is cut into 10 cm ⁇ 10 cm, and then the refractive index is obtained according to the following method.
- a U-4000 model manufactured by Hitachi, Ltd.
- the back side on the measurement side of each sample is roughened, and then light absorption treatment is performed with a black spray to reflect light on the back side.
- the reflectance is measured at 25 points in the visible light region (400 to 700 nm) under the condition of regular reflection at 5 degrees to obtain an average value, and the average refractive index is obtained from the measurement result.
- the preferred refractive index of the high refractive index layer in the present invention is 1.80 to 2.50, more preferably 1.90 to 2.20.
- the preferable refractive index of the low refractive index layer is 1.10 to 1.60, more preferably 1.30 to 1.50.
- a layer structure in which the layer adjacent to the substrate is a low refractive index layer containing silicon oxide and the outermost layer is also a low refractive index layer containing silicon oxide is preferable.
- both the high refractive index layer and the low refractive index layer preferably contain metal oxide particles and a water-soluble resin.
- the heat ray reflecting function may be provided not only on one side of the support but also on both sides.
- the above-described heat ray reflection unit When provided on only one surface of the support, the above-described heat ray reflection unit is provided, and when providing the heat ray reflection function on both surfaces, the above-mentioned heat ray reflection unit is provided on one surface, and the above-described heat ray is provided on the other surface. Even if it is a reflection unit, you may provide a different form.
- Metal oxide particles examples include titanium dioxide, zirconium oxide, zinc oxide, synthetic amorphous silica, silicon dioxide (preferably colloidal silica), alumina, colloidal alumina, lead titanate, red lead, yellow Lead, zinc yellow, chromium oxide, ferric oxide, iron black, copper oxide, magnesium oxide, magnesium hydroxide, strontium titanate, yttrium oxide, niobium oxide, europium oxide, lanthanum oxide, zircon, tin oxide it can.
- the content of the metal oxide particles in the high refractive index layer and the low refractive index layer is preferably 50% by mass or more and 95% by mass or less, and 60% by mass with respect to 100% by mass of the total solid content of each refractive index layer. More preferred is 90% by mass or less.
- the mass ratio (F / B) between the metal oxide particles (F) and the water-soluble polymer (B) as a binder constituting each layer is in the range of 0.5 to 20. It is preferable that it is 1.0 to 10.
- TiO 2 , ZnO, and ZrO 2 are preferable. From the viewpoint of stability of the metal oxide particle-containing composition described later for forming the high refractive index layer. Then, TiO 2 (titanium dioxide sol) is more preferable. Of TiO 2, the rutile type is preferable because the catalyst activity is low and the weather resistance of the high refractive index layer and the adjacent layer is high, and the refractive index is high.
- Examples of a method for preparing a titanium dioxide sol that can be used in the present invention include JP-A 63-17221, JP-A 7-819, JP-A 9-165218, and JP-A 11-43327. Can be a reference.
- titanium dioxide sol For other methods of preparing titanium dioxide sol, refer to, for example, JP-A-63-17221, JP-A-7-819, JP-A-9-165218, JP-A-11-43327, etc. be able to.
- the preferred primary particle diameter (volume average particle diameter) of the titanium dioxide fine particles is 4 to 50 nm, more preferably 4 to 30 nm.
- the low refractive index layer it is preferable to use silicon dioxide particles as the metal oxide particles, and it is particularly preferable to use acidic colloidal silica sol.
- the silicon dioxide particles according to the present invention preferably have an average particle size (volume average particle size) of 100 nm or less.
- the average particle diameter of primary particles of silicon dioxide dispersed in a primary particle state is more preferably 50 nm or less, further preferably 30 nm or less, and 20 nm or less. Are particularly preferred.
- grains it is preferable from a viewpoint with few hazes and excellent visible light transmittance
- the volume average particle diameter of the titanium oxide particles according to the present invention is a method of observing the particles themselves using a laser diffraction scattering method, a dynamic light scattering method, or an electron microscope, or appears on the cross section or surface of the refractive index layer.
- the method of observing the particle image with an electron microscope 1,000 arbitrary particle diameter of the particles (primary particle size) is measured, the particle diameter of d 1, d 2 ⁇ d i ⁇ d k respectively In a group of titanium oxide particles in which n 1 , n 2 ... N i ...
- volume per particle is v i
- volume average particle diameter m v The average particle size weighted by the volume represented by ⁇ (v i ⁇ d i ) ⁇ / ⁇ (v i ) ⁇ .
- At least one of two or more layers having different refractive indexes contains metal oxide particles and a water-soluble polymer.
- the water-soluble polymer that can be used in the present invention is preferably at least one selected from a polymer having a reactive functional group, an inorganic polymer, a thickening polysaccharide, a collagen peptide, and gelatin. Of these, polymers having reactive functional groups, thickening polysaccharides, collagen peptides and gelatin are preferred.
- the refractive index layer and the layer adjacent to the refractive index layer use different water-soluble polymers, but the adjacent layers are mixed during coating and drying, and the uniform refractive index layer. From the viewpoint of not becoming.
- These water-soluble polymers may be used alone or in combination of two or more.
- the “water-soluble” of the “water-soluble polymer” according to the present invention means a solubility that dissolves 1% by mass or more in an aqueous medium at 25 ° C.
- the concentration of the water-soluble polymer in the high refractive index layer coating solution and the low refractive index layer coating solution according to the present invention is preferably 0.3 to 3.0% by mass, and 0.35 to 2.0% by mass. % Is more preferable.
- a polymer having a reactive functional group is preferably used as one of the water-soluble polymers that can be used in the present invention.
- water-soluble polymer examples include polymers having reactive functional groups, such as polyvinyl alcohols, polyvinyl pyrrolidones, polyacrylic acid, acrylic acid-acrylonitrile copolymer, potassium acrylate- Acrylic resins such as acrylonitrile copolymer, vinyl acetate-acrylic acid ester copolymer, or acrylic acid-acrylic acid ester copolymer, styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer, styrene- Styrene acrylic resin such as methacrylic acid-acrylic acid ester copolymer, styrene- ⁇ -methylstyrene-acrylic acid copolymer, or styrene- ⁇ -methylstyrene-acrylic acid-acrylic acid ester copolymer, styrene-styrene Sodium sulfonate copolymer, styrene-sty
- the weight average molecular weight of the water-soluble polymer is preferably 1,000 or more and 200,000 or less. Furthermore, 3,000 or more and 40,000 or less are more preferable.
- Polyvinyl alcohol preferably used in the present invention includes, in addition to ordinary polyvinyl alcohol obtained by hydrolyzing a polyvinyl acetate homopolymer, stereoregular polyvinyl alcohol obtained by hydrolyzing a copolymer of polyvinyl pivalate, Also included are modified polyvinyl alcohol obtained by hydrolyzing a polyvinyl alcohol copolymer having a terminal cation modified, an anion modified polyvinyl alcohol having an anionic group, or the like, or a polyvinyl acetate copolymer.
- a modified polyvinyl alcohol obtained by hydrolysis of a copolymer of vinyl acetate and ethylene sold by Kuraray under the trademark EXVAL can be preferably used.
- the polyvinyl alcohol obtained by hydrolyzing vinyl acetate preferably has an average degree of polymerization of 1,000 or more, and particularly preferably has an average degree of polymerization of 1,500 to 5,000.
- the degree of saponification is preferably 70 to 100%, particularly preferably 80 to 99.5%.
- Examples of the cation-modified polyvinyl alcohol include primary to tertiary amino groups and quaternary ammonium groups in the main chain or side chain of the polyvinyl alcohol as described in JP-A-61-10383. It is obtained by saponifying a copolymer of an ethylenically unsaturated monomer having a cationic group and vinyl acetate.
- Examples of the ethylenically unsaturated monomer having a cationic group include trimethyl- (2-acrylamido-2,2-dimethylethyl) ammonium chloride and trimethyl- (3-acrylamido-3,3-dimethylpropyl) ammonium chloride.
- the ratio of the cation-modified group-containing monomer in the cation-modified polyvinyl alcohol is 0.1 to 10 mol%, preferably 0.2 to 5 mol%, relative to vinyl acetate.
- Anion-modified polyvinyl alcohol is described in, for example, polyvinyl alcohol having an anionic group as described in JP-A-1-206088, JP-A-61-237681 and JP-A-63-307979.
- examples thereof include a copolymer of vinyl alcohol and a vinyl compound having a water-soluble group, and a modified polyvinyl alcohol having a water-soluble group as described in JP-A-7-285265.
- Nonionic modified polyvinyl alcohol includes, for example, a polyvinyl alcohol derivative in which a polyalkylene oxide group is added to a part of vinyl alcohol as described in JP-A-7-9758, and JP-A-8-25795.
- the block copolymer of the vinyl compound and vinyl alcohol which have the described hydrophobic group is mentioned.
- Polyvinyl alcohol can be used in combination of two or more, such as the degree of polymerization and the type of modification.
- a curing agent may be used when a polymer having a reactive functional group is used.
- the polymer having a reactive functional group is polyvinyl alcohol, boric acid and a salt thereof described later and an epoxy curing agent are preferable.
- an inorganic polymer such as a zirconium atom-containing compound or an aluminum atom-containing compound is preferably used.
- the compound containing a zirconium atom applicable to the present invention excludes zirconium oxide, and specific examples thereof include zirconium difluoride, zirconium trifluoride, zirconium tetrafluoride, hexafluorozirconium salt (for example, Potassium salt), heptafluorozirconate (for example, sodium salt, potassium salt or ammonium salt), octafluorozirconate (for example, lithium salt), fluorinated zirconium oxide, zirconium dichloride, zirconium trichloride, tetrachloride Zirconium, hexachlorozirconium salt (for example, sodium salt and potassium salt), zirconium oxychloride (zirconyl chloride), zirconium dibromide, zirconium tribromide, zirconium tetrabromide, zirconium bromide oxide, zirconium triiodide,
- zirconyl chloride, zirconyl sulfate, sodium zirconyl sulfate, acidic zirconyl sulfate trihydrate, zirconyl nitrate, zirconyl carbonate, zirconyl ammonium carbonate, zirconyl acetate, zirconyl ammonium acetate, zirconyl stearate are more preferable.
- zirconyl carbonate, zirconyl ammonium carbonate, zirconyl acetate, zirconyl nitrate and zirconyl chloride particularly preferably zirconyl ammonium carbonate, zirconyl chloride and zirconyl acetate.
- Zircosol ZA-20 Zirconyl Acetate
- Zircosol ZC-2 Zirconyl Chloride
- Daiichi Rare Element Chemical Industry Daiichi Rare Element Chemical Industry
- Zircosol ZN zirconyl nitrate
- s and t represent integers of 1 or more.
- the inorganic polymer containing a zirconium atom may be used alone, or two or more different compounds may be used in combination.
- the compound containing a zirconium atom may be used alone, or two or more different compounds may be used in combination.
- the compound containing an aluminum atom in the molecule that can be used in the present invention does not contain aluminum oxide.
- Specific examples thereof include aluminum fluoride, hexafluoroaluminic acid (for example, potassium salt), aluminum chloride, Basic aluminum chloride (eg, polyaluminum chloride), tetrachloroaluminate (eg, sodium salt), aluminum bromide, tetrabromoaluminate (eg, potassium salt), aluminum iodide, aluminate (eg, Sodium salt, potassium salt, calcium salt), aluminum chlorate, aluminum perchlorate, aluminum thiocyanate, aluminum sulfate, basic aluminum sulfate, potassium aluminum sulfate (alum), ammonium aluminum sulfate (ammonium alum) , Sodium aluminum sulfate, aluminum phosphate, aluminum nitrate, aluminum hydrogen phosphate, aluminum carbonate, aluminum polysulfate silicate, aluminum formate, aluminum acetate, aluminum
- TAKIBAIN # 1500 which is polyaluminum chloride (PAC) manufactured by Taki Chemical, polyaluminum hydroxide (Paho) manufactured by Asada Chemical Co., and Purachem manufactured by Riken Green Co., Ltd. WT is listed, and various grades are available.
- PAC polyaluminum chloride
- Paho polyaluminum hydroxide
- Purachem manufactured by Riken Green Co., Ltd. WT is listed, and various grades are available.
- s, t, and u represent an integer of 1 or more.
- the amount of the inorganic polymer added is preferably 1 to 100 parts by mass, more preferably 2 to 50 parts by mass with respect to 100 parts by mass of the inorganic oxide particles.
- ⁇ Thickening polysaccharide> it is preferable to use a thickening polysaccharide as the water-soluble polymer.
- the thickening polysaccharide that can be used in the present invention is not particularly limited, and examples thereof include generally known natural simple polysaccharides, natural complex polysaccharides, synthetic simple polysaccharides, and synthetic complex polysaccharides.
- the details of these polysaccharides can be referred to “Biochemical Encyclopedia (2nd edition), Tokyo Chemical Doujinshi”, “Food Industry”, Vol. 31 (1988), p.
- the thickening polysaccharide referred to in the present invention is a saccharide polymer, and has a characteristic of promoting a viscosity difference between a low temperature and a high temperature. Furthermore, the viscosity increase is caused by adding the thickening polysaccharide according to the present invention to the coating solution containing the metal oxide fine particles, and the viscosity increase range is such that the viscosity at 15 ° C. is 1.0 mPas. -A polysaccharide that causes an increase of s or more, preferably 5.0 mPa ⁇ s or more, more preferably a polysaccharide having a viscosity increasing ability of 10.0 mPa ⁇ s or more.
- thickening polysaccharide examples include ⁇ 1-4 glucan (eg, carboxymethylcellulose, carboxyethylcellulose, etc.), galactan (eg, agarose, agaropectin, etc.), galactomannoglycan (eg, locust bean gum).
- glucan eg, carboxymethylcellulose, carboxyethylcellulose, etc.
- galactan eg, agarose, agaropectin, etc.
- galactomannoglycan eg, locust bean gum
- xyloglucan eg, tamarind gum, etc.
- glucomannoglycan eg, salmon mannan, wood-derived glucomannan, xanthan gum, etc.
- galactoglucomannoglycan eg, softwood-derived glycan
- arabino Galactoglycans for example, soybean-derived glycans, microorganism-derived glycans, etc.
- gluconamnoglycans for example, gellan gum
- glycosaminoglycans for example, hyaluronic acid, keratan sulfate, etc.
- alginic acid and alginate agar Examples include natural polymer polysaccharides derived from red algae such as ⁇ -carrageenan, ⁇ -carrageenan, ⁇ -carrageenan, and fercelerane, and are preferable from the viewpoint of not reducing the dispersion stability of the metal oxide
- the structural unit preferably has no carboxylic acid group or sulfonic acid group.
- polysaccharides include, for example, pentoses such as L-arabitose, D-ribose, 2-deoxyribose, and D-xylose, and hexoses such as D-glucose, D-fructose, D-mannose, and D-galactose only. It is preferable that it is a polysaccharide.
- tamarind seed gum known as xyloglucan whose main chain is glucose and side chain is glucose
- guar gum known as galactomannan whose main chain is mannose and side chain is glucose
- cationized guar gum Hydroxypropyl guar gum
- locust bean gum locust bean gum
- tara gum arabinogalactan whose main chain is galactose and whose side chain is arabinose
- tamarind, guar gum, cationized guar gum, and hydroxypropyl guar gum are particularly preferable.
- the content of the thickening polysaccharide is preferably 5% by mass or more and 50% by mass or less, and more preferably 10% by mass or more and 40% by mass or less. However, when used in combination with other water-soluble polymers or emulsion resins, it may be contained in an amount of 3% by mass or more. When the content is 50% by mass or less, the relative content of the metal oxide becomes appropriate, and it becomes easy to increase the refractive index difference between the high refractive index layer and the low refractive index layer.
- the two or more layers having different refractive indexes constituting the heat ray reflective unit according to the present invention may contain a collagen peptide.
- the collagen peptide is not particularly limited, and commercially available products can be preferably used.
- the two or more layers having different refractive indexes constituting the heat ray reflective unit according to the present invention can contain gelatin.
- gelatin according to the present invention examples include acid-treated gelatin and alkali-treated gelatin, as well as enzyme-treated gelatin and gelatin derivatives that undergo enzyme treatment in the gelatin production process, that is, amino groups, imino groups, hydroxyl groups as functional groups in the molecule. It may be modified by treatment with a reagent having a group and a carboxyl group and a group obtained by reacting with it.
- the general method for producing gelatin is well known and is described, for example, in T.W. H. James: The Theory of Photographic Process 4th. ed. Reference can be made to descriptions such as 1977 (Macmillan), 55, Scientific Photographic Handbook (above), 72-75 (Maruzen), Fundamental of Photographic Engineering-Silver Salt Photography, 119-124 (Corona).
- (Curing agent) In the present invention, it is preferable to use a curing agent in order to cure the water-soluble polymer as a binder.
- the curing agent applicable to the present invention is not particularly limited as long as it causes a curing reaction with a water-soluble polymer.
- the water-soluble polymer is polyvinyl alcohol, boric acid and its salt are preferable.
- known compounds can be used and are generally compounds having groups capable of reacting with water-soluble polymers or compounds that promote the reaction between different groups of water-soluble polymers. It is appropriately selected depending on the kind of molecule.
- the curing agent include, for example, epoxy curing agents (diglycidyl ethyl ether, ethylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,6-diglycidyl cyclohexane, N, N-diglycidyl- 4-glycidyloxyaniline, sorbitol polyglycidyl ether, glycerol polyglycidyl ether, etc.), aldehyde curing agents (formaldehyde, glioxal, etc.), active halogen curing agents (2,4-dichloro-4-hydroxy-1,3,5) -S-triazine, etc.), active vinyl compounds (1,3,5-trisacryloyl-hexahydro-s-triazine, bisvinylsulfonylmethyl ether, etc.), aluminum alum and the like.
- epoxy curing agents diglycidyl ethyl ether
- Boric acid or a salt thereof refers to an oxygen acid having a boron atom as a central atom and a salt thereof, specifically, orthoboric acid, diboric acid, metaboric acid, tetraboric acid, pentaboric acid, and octaboron. Examples include acids and their salts.
- Boric acid having a boron atom and a salt thereof as a curing agent may be used alone or in a mixture of two or more. Particularly preferred is a mixed aqueous solution of boric acid and borax.
- aqueous solutions of boric acid and borax can be added only in relatively dilute aqueous solutions, respectively, but by mixing them both can be made into a concentrated aqueous solution and the coating solution can be concentrated. Further, there is an advantage that the pH of the aqueous solution to be added can be controlled relatively freely.
- the total amount of the curing agent used is preferably 1 to 600 mg per 1 g of the water-soluble polymer.
- a surfactant may be added to at least one of the six or more layers having different refractive indexes constituting the heat ray reflective unit according to the present invention.
- the activator species any of anionic, cationic and nonionic types can be used.
- acetylene glycol-based nonionic surfactants, quaternary ammonium salt-based cationic surfactants and fluorine-based cationic surfactants are preferred.
- the addition amount of the surfactant according to the present invention is preferably in the range of 0.005 to 0.30% by mass as the solid content when each coating solution is 100% by mass, and more preferably, the amount of addition is 0.8.
- the content is preferably from 01 to 0.10% by mass.
- amino acid In the present invention, an amino acid can be further added.
- the amino acid as used in the present invention is a compound having an amino group and a carboxyl group in the same molecule, and may be any type of amino acid such as ⁇ -, ⁇ -, ⁇ -, but has an isoelectric point of 6.5 or less. It is preferably an amino acid.
- Some amino acids have optical isomers, but in the present invention, there is no difference in effect due to optical isomers, and any isomer having an isoelectric point of 6.5 or less is used alone or in racemic form. be able to.
- preferred amino acids include glycine, alanine, valine, ⁇ -aminobutyric acid, ⁇ -aminobutyric acid, ⁇ -alanine, serine, ⁇ -amino-n-caproic acid, leucine, norleucine, phenylalanine, threonine, asparagine, asparagine.
- examples include acid, histidine, lysine, glutamine, cysteine, methionine, proline, hydroxyproline, etc.
- the solubility at the isoelectric point is preferably 3 g or more with respect to water 100, for example, Glycine, alanine, serine, histidine, lysine, glutamine, cysteine, methionine, proline, hydroxyproline, etc. are preferably used, and from the viewpoint that the metal oxide particles have a gradual hydrogen bond with the binder, serine, hydride having a hydroxyl group. It is more preferable to use a Kishipurorin.
- At least one of the high refractive index layer and the low refractive index layer can contain a lithium compound together with the metal oxide particles and the water-soluble polymer.
- the lithium compound applicable to the present invention is not particularly limited.
- the addition amount of the lithium compound is preferably in the range of 0.005 to 0.05 g, more preferably 0.01 to 0.03 g, per 1 g of metal oxide particles present in the refractive index layer.
- Each layer having different refractive indexes constituting the heat ray reflective unit according to the present invention can contain an emulsion resin.
- the emulsion resin as referred to in the present invention is resin fine particles obtained by keeping an oil-soluble monomer in an emulsion state in an aqueous solution containing a dispersant and emulsion polymerization using a polymerization initiator.
- the dispersant used in the polymerization of the emulsion includes polyoxyethylene in addition to a low molecular weight dispersant such as alkyl sulfonate, alkyl benzene sulfonate, diethylamine, ethylenediamine, and quaternary ammonium salt.
- a low molecular weight dispersant such as alkyl sulfonate, alkyl benzene sulfonate, diethylamine, ethylenediamine, and quaternary ammonium salt.
- examples thereof include polymer dispersants such as nonylphenyl ether, polyethylene ethylene laurate ether, hydroxyethyl cellulose, and polyvinylpyrrolidone.
- the emulsion resin according to the present invention is a resin in which fine (average particle diameter: 0.01 to 2 ⁇ m) resin particles are dispersed in an aqueous medium in an emulsion state.
- An oil-soluble monomer is dispersed in a polymer having a hydroxyl group. Obtained by emulsion polymerization using an agent.
- the polymer dispersant containing a hydroxyl group is a polymer dispersant having a weight average molecular weight of 10,000 or more, and has a hydroxyl group substituted at the side chain or terminal.
- an acrylic polymer such as sodium polyacrylate or polyacrylamide is used.
- examples of such polymers include 2-ethylhexyl acrylate copolymer, polyethers such as polyethylene glycol and polypropylene glycol, and polyvinyl alcohol. Polyvinyl alcohol is particularly preferable.
- Polyvinyl alcohol used as a polymer dispersant is an anion-modified polyvinyl alcohol having an anionic group such as a cation-modified polyvinyl alcohol or a carboxyl group in addition to the usual polyvinyl alcohol obtained by hydrolyzing polyvinyl acetate. Further, modified polyvinyl alcohol such as silyl-modified polyvinyl alcohol having a silyl group is also included. Polyvinyl alcohol has a higher effect of suppressing the occurrence of cracks when forming the ink absorbing layer when the average degree of polymerization is higher, but when the average degree of polymerization is within 5000, the viscosity of the emulsion resin is not high, and at the time of production Easy to handle.
- the average degree of polymerization is preferably 300 to 5000, more preferably 1500 to 5000, and particularly preferably 3000 to 4500.
- the saponification degree of polyvinyl alcohol is preferably 70 to 100 mol%, more preferably 80 to 99.5 mol%.
- Examples of the resin that is emulsion-polymerized with the above polymer dispersant include homopolymers or copolymers of ethylene monomers such as acrylic acid esters, methacrylic acid esters, vinyl compounds, and styrene compounds, and diene compounds such as butadiene and isoprene.
- Examples of the polymer include acrylic resins, styrene-butadiene resins, and ethylene-vinyl acetate resins.
- whitening agents such as sulfuric acid, phosphoric acid, acetic acid , PH adjusters such as citric acid, sodium hydroxide, potassium hydroxide, potassium carbonate, antifoaming agents, lubricants such as diethylene glycol, preservatives, Antistatic agents, can also contain various known additives such as a matting agent.
- the heat ray reflective film of the present invention is a manufacturing method of the aspect which has the process of forming the layer which comprises the said heat ray reflective film especially using a water-system coating liquid. That is, the heat ray reflective film of the present invention is composed of a high refractive index layer and a low refractive index layer on a base material and is formed by laminating units. It is preferable to form a laminate by wet coating and drying alternately with the refractive index layer coating solution.
- the aqueous coating liquid means that a solvent containing water as a main component is used as a solvent.
- water is preferably contained in an amount of 50% or more, more preferably 60% or more, still more preferably 70% or more, and particularly preferably 80% or more.
- the solvent used other than water include alcohols such as methanol, ethanol, 2-propanol and 1-butanol, ethers such as ethylene glycol, diethylene glycol and triethylene glycol, amides such as dimethylformamide and N-methylpyrrolidone. And ketones such as acetone and methyl ethyl ketone. These solvents may be used alone or in combination of two or more.
- coating methods include dip coating, blade coating, air knife coating, wire bar coating, gravure coating, reverse coating, reverse roll coating, extrusion coating, slide coating, and curtain coating. And an extrusion coating method.
- roll coating method rod bar coating method, air knife coating method, spray coating method (spin coater), slide coating method (slide coater), curtain coating method, or US Pat. No. 2,761,419, The slide bead coating method using the hopper and the extrusion coating method described in Japanese Patent No. 2,761,791 are preferably used.
- the viscosity of the high refractive index layer coating solution and the low refractive index layer coating solution in simultaneous multilayer coating is preferably in the range of 5 to 100 mPa ⁇ s, more preferably 10 to The range is 50 mPa ⁇ s.
- the range is preferably 5 to 1200 mPa ⁇ s, and more preferably 25 to 500 mPa ⁇ s.
- the viscosity at 15 ° C. of the coating solution is preferably 100 mPa ⁇ s or more, more preferably 100 to 30,000 mPa ⁇ s, still more preferably 3,000 to 30,000 mPa ⁇ s, and most preferably 10 , 30,000 to 30,000 mPa ⁇ s.
- a water-based high refractive index layer coating solution and a low refractive index layer coating solution are heated to 30 ° C. or more, and after coating, the temperature of the formed coating film is set to 1 to 15 ° C. It is preferably cooled once and dried at 10 ° C. or higher, and more preferably, the drying conditions are wet bulb temperature 5 to 50 ° C. and film surface temperature 10 to 50 ° C. Moreover, as a cooling method immediately after application
- the heat ray reflective film of the present invention has a conductive layer, an antistatic layer, a gas barrier layer, an easy adhesion layer (adhesion layer) for the purpose of adding further functions under the support or on the outermost surface layer opposite to the support.
- Layer an antifouling layer, deodorant layer, droplet layer, slippery layer, hard coat layer, wear-resistant layer, antireflection layer, electromagnetic wave shielding layer, heat ray absorbing layer, ultraviolet absorbing layer, infrared absorbing layer, UV cut Layer, printed layer, fluorescent light emitting layer, hologram layer, release layer, adhesive layer, adhesive layer, heat ray cut layer (metal layer, liquid crystal layer) other than high refractive index layer and low refractive index layer of the present invention (colored layer) It may have one or more of functional layers such as an intermediate film layer used for a laminated glass.
- the formation method of these functional layers is not particularly limited, but is preferably formed by a wet coating method such as a spin coating method, a spray method, a blade coating method, a dip method, or a dry coating method such as an evaporation method.
- a wet coating method such as a spin coating method, a spray method, a blade coating method, a dip method, or a dry coating method such as an evaporation method.
- the heat ray reflective film of the present invention can be suitably applied to various forms of heat ray reflectors in a wide range of fields. For example, pasting to facilities exposed to sunlight for a long time such as outdoor windows of buildings and automobile windows, film for window pasting such as heat ray reflecting film to give heat ray reflecting effect, film for agricultural greenhouse, etc. Used mainly for the purpose of improving weather resistance.
- the adhesive so that the heat ray reflective film is on the sunlight (heat ray) incident surface side when pasted on a window glass. Further, when the heat ray reflective film is sandwiched between the window glass and the substrate, it can be sealed from ambient gas such as moisture, which is preferable for durability. Even if the heat ray reflective film of the present invention is installed outdoors or outside a car (for external application), it is preferable because of environmental durability.
- an adhesive mainly composed of a photocurable or thermosetting resin can be used.
- the adhesive preferably has durability against ultraviolet rays, and is preferably an acrylic adhesive or a silicone adhesive. Furthermore, an acrylic adhesive is preferable from the viewpoint of adhesive properties and cost. In particular, since the peel strength can be easily controlled, a solvent system is preferable among the solvent system and the emulsion system in the acrylic adhesive. When a solution polymerization polymer is used as the acrylic solvent-based pressure-sensitive adhesive, known monomers can be used as the monomer.
- a polyvinyl butyral resin or an ethylene-vinyl acetate copolymer resin used as an intermediate layer of laminated glass may be used.
- plastic polyvinyl butyral manufactured by Sekisui Chemical Co., Ltd., Mitsubishi Monsanto Co., Ltd.
- ethylene-vinyl acetate copolymer manufactured by DuPont, Takeda Pharmaceutical Company Limited, duramin
- modified ethylene-vinyl acetate copolymer (Mersen G, manufactured by Tosoh Corporation).
- Example I Preparation of coating solution 1 To 20.2 g of 30.0% by mass silica oxide sol (volume average particle size 20 nm, silicon dioxide particles (trade name: Silica Doll 20P)), 22.5 g of 5.0% by mass acid-treated gelatin aqueous solution was stirred. The mixture was gradually added while mixing. Next, 0.043 g of 5.0% by mass of 2-DB-500E (manufactured by NOF Corporation) was added as a surfactant and finished to 75 mL with pure water to prepare coating solution 1.
- 2-DB-500E manufactured by NOF Corporation
- coating solution 2 (Preparation of coating solution 2) 22.5 g of 15.0 mass% titanium oxide sol (volume average particle diameter 5 nm, rutile type titanium oxide particles (manufactured by Sakai Chemical Co., Ltd .: trade name SRD-W)) 25.0 g of 5.0 mass% acid-treated gelatin aqueous solution Were gradually added and mixed with stirring. Next, 0.043 g of 5.0% by mass of 2-DB-500E (manufactured by NOF Corporation) was added as a surfactant, and finished to 75 mL with pure water to prepare coating solution 2.
- 2-DB-500E manufactured by NOF Corporation
- Comparative Samples 1 to 5 and Samples 1 to 6 according to the present invention (hereinafter also simply referred to as “Invention Sample”) 1 to 6 were produced.
- the reflection of light on the back surface is prevented, and the average value is obtained by measuring 25 points of reflectance in the visible light region (400 nm to 700 nm) under the condition of regular reflection at 5 degrees, and the average refractive index is determined from the measurement result. Asked.
- the cello tape made by Nichiban Co., Ltd.
- the width direction center of the cello tape from the position 2 cm in front of the wound in the direction perpendicular to the length of the wound and 2 cm behind the wound. Then, it was peeled sharply toward the front at 45 °, and the film adhesion (adhesiveness) of the coating film was evaluated based on the following criteria.
- the damaged part was defined as “scratch position”, which was used as a reference position for evaluation.
- ⁇ Evaluation> 0 The film peels from a position of ⁇ 0.1 cm to ⁇ 2.0 cm from the position of the scratch (starts to peel from a place where there is no scratch (a position where there is no starting point, ahead of the position of the scratch)) 1: The film is peeled from the position of the wound to a position of 2 cm or more (the film is peeled from the position of the wound to a place where the tape is not applied). 2: The film peels from the position of the wound to the position of 2 cm (peeling from the position of the wound to the place where the tape is applied) 3: The film peels from the scratch position to a position of 1 cm or more and less than 2 cm. 4: The film peels from the scratch position to a position of 0.2 cm or more and less than 1 cm. 5: The film from the scratch position to a position of 0 cm or more and less than 0.2 cm. Peel off 6: No film peeling.
- a spectrophotometer (U-4000 model manufactured by Hitachi, Ltd.) is attached with a 5 ° reflection unit, and after correcting the baseline with the attached mirror, the heat reflection unit surface side is used as the measurement surface, and in the region of 800 to 1400 nm, The reflectance at 301 points was measured at intervals of 2 nm, and the value obtained by adding all the obtained reflectances was divided by 301 to evaluate the average heat ray reflectance based on the following criteria.
- Average heat ray reflectivity is less than 1% 2: Average heat ray reflectivity is 1% or more and less than 4% 3: Average heat ray reflectivity is 4% or more and less than 19% 4: Average heat ray reflectivity is 19% or more and less than 34% 5 : Average heat ray reflectance is 34% or more.
- Table 1 The results of the above evaluation are summarized in Table 1.
- a comparative sample is shown as a comparative example, and a sample of the present invention is shown as an example.
- a heat ray reflective film having high heat ray reflectivity, good film attachment (peeling resistance) and capable of increasing the area, and specific reflected light in the visible light region is inconspicuous, and a method for producing the same It can be seen that it can be provided.
- Example II Preparation of coating solution 3 15.0% by mass of titanium oxide sol (volume average particle diameter 5 nm, rutile type titanium oxide particles (manufactured by Sakai Chemical Co., Ltd .: trade name SRD-W)) is added to 5.0% by mass of collagen peptide (Nitta Gelatin Co., Ltd.). SCP-5200) 11.5 g aqueous solution was gradually added and mixed with stirring. Thereafter, 15 g of 2.5% by mass tamarind seed gum was added, and then 0.043 g of 5.0% by mass of 2-DB-500E (manufactured by NOF Corporation) was added as a surfactant, and the volume was adjusted to 50 mL with pure water. Coating liquid 3 was prepared by finishing.
- titanium oxide sol volume average particle diameter 5 nm, rutile type titanium oxide particles (manufactured by Sakai Chemical Co., Ltd .: trade name SRD-W)
- collagen peptide Nita Gelatin Co., Ltd.
- coating solution 4 15.0% by mass of titanium oxide sol (volume average particle diameter 5 nm, rutile type titanium oxide particles (manufactured by Sakai Chemical Co., Ltd .: trade name SRD-W)) is added to 5.0% by mass of collagen peptide (Nitta Gelatin Co., Ltd.). SCP-5200) 11.5 g aqueous solution was gradually added and mixed with stirring. Thereafter, 11 g of 5.0 mass% polyvinyl alcohol (Exeval RS-2117 manufactured by Kuraray Co., Ltd.) was added, and then 0.043 g of 5.0 mass% 2-DB-500E (manufactured by NOF Corporation) was used as a surfactant. The coating liquid 4 was prepared by adding and finishing to 50 mL with pure water.
- Comparative sample 6 A PET film that has been subjected to easy adhesion treatment is cut into a size of 7 cm ⁇ 7 cm, and water is supplied to the glass substrate cut into a size of 8 cm ⁇ 8 cm through water containing a dishwashing detergent (Joy, P & G).
- the coating solution 1 is dropped on the pasted form, and the spin coater rotation speed is adjusted, the coating is coated so that the dry layer thickness is 170 nm, and then peeled off from the glass surface and dried on a hot plate at 80 ° C. I let you.
- the coating solution 2 was dropped and coated such that the dry layer thickness was 130 nm, peeled off from the glass surface again, and dried on a hot plate at 80 ° C. This was repeated for a total of 6 layers. Furthermore, the sample of the comparative sample 6 was produced by repeating the process of forming 6 layers 4 times in total.
- Comparative sample 7 A PET film that has been subjected to easy adhesion treatment is cut into a size of 7 cm ⁇ 7 cm, and water is supplied to the glass substrate cut into a size of 8 cm ⁇ 8 cm through water containing a dishwashing detergent (Joy, P & G).
- the coating solution 1 is dropped on the film thus adhered, the number of rotations of the spin coater is adjusted, and the coating is coated so that the dry layer thickness is 170 nm, then peeled off from the glass surface, and then peeled off from the glass surface. Dry on a hot plate at 0 ° C.
- the coating solution 3 was dropped and coated so as to have a dry layer thickness of 130 nm, peeled off from the glass surface again, and dried on an 80 ° C. hot plate. Subsequently, the coating liquid 1, the coating liquid 3, the coating liquid 1, and the coating liquid 3 were repeated so that the dry layer thickness described in the table was 6 layers in total, and further, the process of forming 6 layers was repeated a total of 4 times, A sample of Comparative Sample 7 was prepared by sequentially applying and drying.
- Comparative sample 8 A comparative sample 8 was prepared by a simultaneous multilayer coating method by adjusting the flow rate and coating speed of each layer so that the coating liquids 1 and 2 were alternately layered in a 24-layer slide coater with the layer thickness described in the table.
- a high refractive index layer coating solution, a low refractive index layer coating solution and a 24 layer slide coater are applied to form a multilayer multilayer, and then dried at 50 ° C. for 5 minutes.
- a comparative sample 8 having a set was prepared.
- a sample 7 of the present invention was prepared by a simultaneous multilayer coating method by adjusting the flow rate of each layer and the coating speed so that the coating liquids 1 and 2 were alternately layered in a 24-layer slide coater to the layer thickness described in the table.
- a high refractive index layer coating solution and a low refractive index layer coating solution are coated with a 24-layer slide coater to form a multilayer multilayer, and then the film surface temperature of the coating film is once cooled to 0 ° C. Was cooled for 5 minutes, and dried at 50 ° C. for 5 minutes to prepare Sample 7 of the present invention having 4 sets of 6-layer units.
- a sample 10 of the present invention was produced by a simultaneous multilayer coating method by adjusting the flow rate of each layer and the coating speed so that the coating liquids 1 and 4 were alternately layered in a 12-layer slide coater to the layer thickness described in the table.
- the coating liquids 1 and 2 are adjusted by the simultaneous multilayer coating method in the same manner as the sample 10 of the present invention by adjusting the flow rate of each layer and the coating speed so that the layer thickness described in the table is obtained with a 12-layer slide coater. This invention sample 11 was produced.
- a sample 12 of the present invention is prepared in the same manner as the sample 10 of the present invention by adjusting the flow rate of each layer and the coating speed so that the coating thicknesses of the coating solutions 1 and 3 are alternately shown in the table on a 12-layer slide coater. did.
- a sample 13 of the present invention is prepared in the same manner as the sample 10 of the present invention by adjusting the flow rate of each layer and the coating speed so that the coating thicknesses of the coating solutions 1 and 4 are alternately shown in the table with a 12-layer slide coater. did.
- a sample 14 of the present invention is prepared in the same manner as the sample 10 of the present invention by adjusting the flow rate of each layer and the coating speed so that the coating thicknesses of the coating solutions 1 and 3 are alternately shown in the table on a 12-layer slide coater. did.
- Example II Each sample obtained above was evaluated in the same manner as in Example I. The results of the above evaluation are summarized in Table 2. In the table, a comparative sample is shown as a comparative example, and a sample of the present invention is shown as an example.
- the obtained sample was sputtered at a rate of 0.5 nm / min using an XPS surface analyzer with the outermost surface being 0 nm, the atomic composition ratio was measured, and a profile in the thickness direction of Si and Ti was produced.
- Si and Ti nested part is mixed region, Si or Ti single region is measured, for example, if it is a silica layer, the Si single layer and half the thickness of the mixed region on both sides
- the Ti alone layer and half the thickness of the mixed region on both sides thereof were defined as the titania layer, and the ratio to the mixed region was determined and listed in Table 2.
- the value of the mixed region is a value obtained by calculating the mixed regions of all the layers in the unit and arithmetically averaging them.
- the mixed region of layers between adjacent units is calculated, and the result is an arithmetic average.
- the refractive index of the layer using the coating liquid 3 was 1.90, and the refractive index of the layer using the coating liquid 4 was 1.95.
- a heat ray reflective film having high heat ray reflectivity, good film attachment (peeling resistance) and capable of increasing the area, and specific reflected light in the visible light region is inconspicuous, and a method for producing the same It can be seen that it can be provided.
- Example III (Preparation of heat ray reflector) Heat ray reflectors 1 to 5 were produced using the heat ray reflective films 1 to 5 produced in Example I. Heat ray reflectors 1 to 5 were prepared by bonding the heat ray reflective films of Samples 1 to 5 with an acrylic adhesive on a transparent acrylic resin plate having a thickness of 5 mm and 20 cm ⁇ 20 cm, respectively.
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Abstract
Description
本発明に係る支持体(「基材」ともいう。)としては、透明な有機材料で形成されたものであれば特に限定されるものではない。
本発明の熱線反射フィルムは、支持体上の一方の面に、屈折率が隣接する層とは異なる屈折率層が少なくとも6層以上積層されて構成される熱線反射ユニットを少なくとも一つ有することを特徴とする。また、当該熱線反射ユニットのうちのいずれか一つのユニットの、前記支持体に一番近い層の層厚が、当該支持体より一番離れた層の層厚の3倍以上であることを特徴とする。また、支持体に一番近い層の層厚が、前記支持体より一番離れた層の層厚の好ましくは3.5倍以上、より好ましくは3.8倍以上、さらに好ましくは4倍以上、特に好ましくは4.5倍以上、もっとも好ましくは5倍以上である。
図2には、本発明の一実施形態である、熱線反射ユニット(第1のユニット)4内に、低屈折率層1と高屈折率層2と、が交互に積層され、低屈折率層と高屈折率層との間に、混合領域3を有する熱線反射フィルムが示されている。
本発明に係る金属酸化物粒子としては、例えば、二酸化チタン、酸化ジルコニウム、酸化亜鉛、合成非晶質シリカ、二酸化ケイ素(好ましくはコロイダルシリカ)、アルミナ、コロイダルアルミナ、チタン酸鉛、鉛丹、黄鉛、亜鉛黄、酸化クロム、酸化第二鉄、鉄黒、酸化銅、酸化マグネシウム、水酸化マグネシウム、チタン酸ストロンチウム、酸化イットリウム、酸化ニオブ、酸化ユーロピウム、酸化ランタン、ジルコン、酸化スズを挙げることができる。
本発明においては、屈折率が相互に異なる二層以上の層のうちの少なくとも一層が、金属酸化物粒子及び水溶性高分子を含有することが好ましい。
本発明において用いることができる水溶性高分子の一つとしては、反応性官能基を有するポリマーを用いることが好ましい。
本発明において用いることができる水溶性高分子の一つとしては、ジルコニウム原子含有化合物あるいはアルミニウム原子含有化合物等の無機ポリマーを用いることが好ましい。
本発明においては、水溶性高分子として、増粘多糖類を用いることが好ましい。
本発明に係る熱線反射ユニットを構成する屈折率が相互に異なる二層以上の層においては、コラーゲンペプチドを含有することもできる。
本発明に係る熱線反射ユニットを構成する屈折率が相互に異なる二層以上の層においては、ゼラチンを含有することもできる。
本発明においては、バインダーである水溶性高分子を硬化させるため、硬化剤を使用することが好ましい。
本発明に係る熱線反射ユニットを構成する屈折率が相互に異なる6層以上の層のうちの少なくとも一層に、界面活性剤を添加しても良い。活性剤種としてはアニオン系、カチオン系、ノニオン系のいずれの種類を使用することができる。特にアセチレングリコール系ノニオン性界面活性剤、4級アンモニウム塩系カチオン性界面活性剤及びフッ素系カチオン性界面活性剤が好ましい。
次いで、本発明に係る熱線反射ユニットを構成する屈折率が相互に異なる各層に適用可能なその他の添加剤について説明する。
本発明においては、更に、アミノ酸を添加することができる。
本発明においては、高屈折率層及び低屈折率層の少なくとも一層が、金属酸化物粒子及び水溶性高分子と共に、リチウム化合物を含有することができる。
本発明に係る熱線反射ユニットを構成する屈折率が相互に異なる各層には、エマルジョン樹脂を含有することができる。
本発明に係る熱線反射ユニットを構成する屈折率が相互に異なる各層に適用可能な各種の添加剤を以下に列挙する。例えば、特開昭57-74193号公報、同57-87988号公報及び同62-261476号公報に記載の紫外線吸収剤、特開昭57-74192号公報、同57-87989号公報、同60-72785号公報、同61-146591号公報、特開平1-95091号公報及び同3-13376号公報等に記載されている退色防止剤、アニオン、カチオン又はノニオンの各種界面活性剤、特開昭59-42993号公報、同59-52689号公報、同62-280069号公報、同61-242871号公報及び特開平4-219266号公報等に記載されている蛍光増白剤、硫酸、リン酸、酢酸、クエン酸、水酸化ナトリウム、水酸化カリウム、炭酸カリウム等のpH調整剤、消泡剤、ジエチレングリコール等の潤滑剤、防腐剤、帯電防止剤、マット剤等の公知の各種添加剤を含有させることもできる。
本発明の熱線反射フィルムの製造方法としては、種々の方法を採用し得る。本発明においては、特に、当該熱線反射フィルムを構成する層を、水系塗布液を用いて形成する工程を有する態様の製造方法であることが好ましい。すなわち、本発明の熱線反射フィルムは、基材上に高屈折率層と低屈折率層から構成されユニットを積層して構成されるが、具体的には水系の高屈折率層塗布液と低屈折率層塗布液とを交互に湿式塗布、乾燥して積層体を形成することが好ましい。
本発明の熱線反射フィルムは、幅広い分野において、種々の態様の熱線反射体に好適に応用することができる。例えば、建物の屋外の窓や自動車窓等長期間太陽光に晒らされる設備に貼り合せ、熱線反射効果を付与する熱線反射フィルム等の窓貼用フィルム、農業用ビニールハウス用フィルム等として、主として耐候性を高める目的で用いられる。
(塗布液1の調製)
30.0質量%酸化シリカゾル(体積平均粒径20nm、二酸化ケイ素粒子(日本化学社製:商品名シリカドール 20P))20.2gに、5.0質量%の酸処理ゼラチン水溶液22.5gを撹拌しながら徐々に添加、混合した。次いで界面活性剤として、5.0質量%の2-DB-500E(日油株式会社製)を0.043g添加し、純水で75mLに仕上げることで塗布液1を調製した。
15.0質量%酸化チタンゾル(体積平均粒径5nm、ルチル型酸化チタン粒子(堺化学社製:商品名SRD-W))20.2gに、5.0質量%の酸処理ゼラチン水溶液22.5gを撹拌しながら徐々に添加、混合した。次いで界面活性剤として、5.0質量%の2-DB-500E(日油株式会社製)を0.043g添加し、純水で75mLに仕上げることで塗布液2を調製した。
易接着処理したPETフィルムを7cm×7cmの大きさに断裁し、8cm×8cmの大きさに切断したガラス基板上に、食器洗浄用洗剤(ジョイ、P&G社製)を0.1%程度含んだ水を介して水貼りした。このフィルム上に、塗布液1を垂らして、スピンコーターの回転数を調整して、乾燥層厚が170nmとなるようにコーティングしたのち、ガラス面から剥がして80℃のホットプレート上で3分間乾燥させた。再びガラス基板上に水貼りしたのち、塗布液2を垂らして乾燥層厚が130nmとなるようにコーティングし、再びガラス面からはがして80℃のホットプレート上で3分間乾燥させた。これを繰り返すことで、比較試料1~5及び、本発明に係る試料(以下、単に「本発明試料」ともいう。)1~6を作製した。
〈屈折率の測定〉
基材上に屈折率を測定する各屈折率層を単層で塗布したサンプルを作製し、このサンプルを10cm×10cmに断裁した後、下記の方法に従って屈折率を求めた。分光光度計として、U-4000型(日立製作所社製)を用いて、各サンプルの測定面とは反対側の面(裏面)を粗面化処理した後、黒色のスプレーで光吸収処理を行って裏面での光の反射を防止して、5度正反射の条件にて可視光領域(400nm~700nm)の反射率を25点測定して平均値を求め、その測定結果より平均屈折率を求めた。
塗布されたフィルムを23℃・相対湿度80%RHで1日調湿したのち、フィルムの表面から20~30°の角度で、かみそり刃にて3cmの長さで傷をつけた。
<評価>
0:傷の位置から-0.1cm~-2.0cmの位置からフィルムが剥がれる(傷のない所(起点のないところ、傷の位置より前方)から剥がれ始める)
1:傷の位置から2cm以上の位置までフィルムがはがれる(傷の位置からテープの貼っていないところまでもはがれる)
2:傷の位置から2cmの位置までフィルムがはがれる(傷の位置から、テープを貼ったところまではがれる)
3:傷の位置から1cm以上2cm未満の位置までフィルムがはがれる
4:傷の位置から0.2cm以上1cm未満の位置までフィルムがはがれる
5:傷の位置から0cm以上0.2cm未満の位置までフィルムがはがれる
6:膜はがれなし。
塗布されたフィルムに蛍光灯に光をあて、斜め45度からの目視でみて、反射光の色を下記基準に基づき評価した。
5:ほとんど色が見えない
4:ごくわずかに色が見える
3:わずかに色が見える
2:少し色が見える
1:はっきりと色が見える。
上記分光光度計(日立製作所社製 U-4000型)に5°反射ユニットを付け、付属の鏡でベースライン補正したのち、熱線反射ユニット面側を測定面にして、800~1400nmの領域で、2nm間隔で301点の反射率を測定し、得られた反射率を全て足し合わせた値を、301で除することで、平均熱線反射率を以下の基準に基づき評価した。
1:平均熱線反射率が1%未満
2:平均熱線反射率が1%以上4%未満
3:平均熱線反射率が4%以上19%未満
4:平均熱線反射率が19%以上34%未満
5:平均熱線反射率が34%以上。
(塗布液3の調製)
15.0質量%酸化チタンゾル(体積平均粒径5nm、ルチル型酸化チタン粒子(堺化学社製:商品名SRD-W))20.2gに、5.0質量%のコラーゲンペプチド(新田ゼラチン社製 SCP-5200)水溶液11.5gを撹拌しながら徐々に添加、混合した。その後、2.5質量%タマリンドシードガムを15g加え、次いで界面活性剤として、5.0質量%の2-DB-500E(日油株式会社製)を0.043g添加し、純水で50mLに仕上げることで塗布液3を調製した。
15.0質量%酸化チタンゾル(体積平均粒径5nm、ルチル型酸化チタン粒子(堺化学社製:商品名SRD-W))20.2gに、5.0質量%のコラーゲンペプチド(新田ゼラチン社製 SCP-5200)水溶液11.5gを撹拌しながら徐々に添加、混合した。その後、5.0質量%ポリビニルアルコール(クラレ社製 エクセバールRS-2117)を11g加え、次いで界面活性剤として、5.0質量%の2-DB-500E(日油株式会社製)を0.043g添加し、純水で50mLに仕上げることで塗布液4を調製した。
(比較試料6)
易接着処理したPETフィルムを7cm×7cmの大きさに断裁し、8cm×8cmの大きさに切断したガラス基板上に、食器洗浄用洗剤(ジョイ、P&G社製)を含んだ水を介して水貼りした、このフォルム上に、塗布液1を垂らして、スピンコーターの回転数を調整して、乾燥層厚が170nmとなるようにコーティングしたのちガラス面から剥がして80℃のホットプレート上で乾燥させた。再びガラス基板上に水貼りしたのち、塗布液2を垂らして乾燥層厚が130nmとなるようにコーティングし、再びガラス面から剥がして80℃のホットプレート上で乾燥させた。これを計6層になるよう繰り返した。さらに、6層形成させる工程を合計4回繰り返すことで、比較試料6の試料を作製した。
易接着処理したPETフィルムを7cm×7cmの大きさに断裁し、8cm×8cmの大きさに切断したガラス基板上に、食器洗浄用洗剤(ジョイ、P&G社製)を含んだ水を介して水貼りした、このフィルム上に、塗布液1を垂らして、スピンコーターの回転数を調整して、乾燥層厚が170nmとなるようにコーティングしたのちガラス面からはがしたのちガラス面からはがして80℃のホットプレート上で乾燥させた。再びガラス基板上に水貼りしたのち、塗布液3を垂らして乾燥層厚が130nmとなるようにコーティングし、再びガラス面から剥がして80℃のホットプレート上で乾燥させた。続いて塗布液1、塗布液3、塗布液1、塗布液3と表記載の乾燥層厚となるように、計6層になるよう繰り返し、さらに、6層形成させる工程を合計4回繰り返し、順次塗布乾燥させ比較試料7の試料を作製した。
塗布液1と2を交互に24層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、同時重層塗布法にて、比較試料8を作製した。
塗布液1と2を交互に24層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、同時重層塗布法にて、本発明試料7を作製した。
塗布液1と3を交互に24層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、同時重層塗布法にて、本発明試料7と同様の方法で本発明試料8を作製した。
塗布液1と4を交互に24層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、同時重層塗布法にて、本発明試料7と同様の方法で本発明試料8を作製した。
塗布液1と4を交互に12層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、同時重層塗布法にて、本発明試料10を作製した。
塗布液1と2を交互に12層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、本発明の試料10と同じように同時重層塗布法にて、本発明試料11を作製した。
塗布液1と3を交互に12層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、本発明の試料10と同じように本発明試料12を作製した。
塗布液1と4を交互に12層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、本発明の試料10と同じように本発明試料13を作製した。
塗布液1と3を交互に12層のスライドコーターで表記載の層厚となるように各層の流量と、塗布速度を調整して、本発明の試料10と同じように本発明試料14を作製した。
上記で得られた各試料について、実施例Iと同様の方法により評価した。以上の評価の結果を表2にまとめて示す。なお、表中、比較試料を比較例、本発明試料を実施例として示す。
(熱線反射体の作製)
実施例Iで作製した熱線反射フィルム1~5を用いて熱線反射体1~5を作製した。厚さ5mm、20cm×20cmの透明アクリル樹脂板上に、試料1~5の熱線反射フィルムをそれぞれアクリル接着剤で接着して、熱線反射体1~5を作製した。
上記作製した熱線反射体1~5について、分光光度計(積分球使用、日立製作所社製、U-4000型)を用い、各熱線反射フィルムの800~1400nmの領域における反射率を測定し、その平均値を求め、これを熱線反射率とした。その結果、熱線反射体1~5は、熱線反射体のサイズが大きいにもかかわらず、容易に利用可能であり、また、本発明の熱線反射フィルムを利用することで、優れた熱線反射性を確認することができた。
2 高屈折率層、
3 混合領域、
4 熱線反射ユニット(第1ユニット)、
5 熱線反射ユニット(第1ユニットに隣接するユニット)、
6 混合領域。
Claims (6)
- 支持体上の一方の面に、屈折率が隣接する層とは異なる屈折率層が少なくとも6層以上積層されて構成される熱線反射ユニットを少なくとも一つ有する熱線反射フィルムであって、
前記熱線反射ユニットのうちのいずれか一つの第1のユニットの、前記支持体に一番近い層の層厚が、前記支持体より一番離れた層の層厚の3倍以上である、熱線反射フィルム。 - 前記第1のユニットの、前記支持体に一番近い層の隣接層の層厚が、前記支持体より一番離れた層の層厚の3倍以上である、請求項1に記載の熱線反射フィルム。
- 前記第1のユニットを構成する層の隣接層間に、前記支持体より一番離れた層の層厚の0.4~0.8倍の範囲内の厚さの混合領域を有する、請求項1又は請求項2に記載の熱線反射フィルム。
- 前記第1のユニットに隣接する二つの熱線反射ユニット間に、前記支持体より一番離れた層の層厚の0.1~0.4倍の範囲内の厚さの混合領域を有する、請求項1~3のいずれか1項に記載の熱線反射フィルム。
- 前記熱線反射フィルムを構成する層を、水系塗布液を用いて形成する工程を有する、請求項1~4のいずれか1項に記載の熱線反射フィルムの製造方法。
- 請求項1~4のいずれか1項に記載の熱反射フィルムまたは請求項5に記載の製造方法により得られた熱反射フィルムが具備されてなる、熱線反射体。
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CN201280013683.3A CN103443667B (zh) | 2011-03-18 | 2012-03-12 | 热线反射膜、其制造方法及热线反射体 |
EP12760882.6A EP2687878B1 (en) | 2011-03-18 | 2012-03-12 | Heat-ray reflecting film, method for producing same, and heat-ray reflecting body |
JP2013505904A JP5854039B2 (ja) | 2011-03-18 | 2012-03-12 | 熱線反射フィルム、その製造方法、及び熱線反射体 |
US14/004,502 US9366788B2 (en) | 2011-03-18 | 2012-03-12 | Heat radiation reflective film and method for producing the same, and heat radiation reflector |
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EP (1) | EP2687878B1 (ja) |
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WO2014069507A1 (ja) * | 2012-11-02 | 2014-05-08 | コニカミノルタ株式会社 | 光学反射フィルム、赤外遮蔽フィルムおよびその製造方法 |
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WO2014171494A1 (ja) * | 2013-04-17 | 2014-10-23 | コニカミノルタ株式会社 | 光学反射フィルム、その製造方法およびそれを用いる光学反射体 |
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WO2014199872A1 (ja) * | 2013-06-14 | 2014-12-18 | コニカミノルタ株式会社 | 赤外遮蔽フィルムおよびこれを用いた赤外遮蔽体および熱線反射合わせガラス |
JPWO2014199872A1 (ja) * | 2013-06-14 | 2017-02-23 | コニカミノルタ株式会社 | 赤外遮蔽フィルムおよびこれを用いた赤外遮蔽体および熱線反射合わせガラス |
JP2015011308A (ja) * | 2013-07-02 | 2015-01-19 | 日油株式会社 | 転写用波長選択的反射フィルム並びにそれを用いた転写方法及び転写成型物 |
WO2015050171A1 (ja) * | 2013-10-01 | 2015-04-09 | コニカミノルタ株式会社 | 光学反射フィルムおよび光学反射体 |
Also Published As
Publication number | Publication date |
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CN103443667A (zh) | 2013-12-11 |
EP2687878B1 (en) | 2017-08-16 |
EP2687878A1 (en) | 2014-01-22 |
EP2687878A4 (en) | 2014-10-29 |
JPWO2012128109A1 (ja) | 2014-07-24 |
CN103443667B (zh) | 2016-09-28 |
JP5854039B2 (ja) | 2016-02-09 |
US20140002895A1 (en) | 2014-01-02 |
US9366788B2 (en) | 2016-06-14 |
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