WO2015133152A1 - 吸湿膜、防水膜及び有機el装置 - Google Patents
吸湿膜、防水膜及び有機el装置 Download PDFInfo
- Publication number
- WO2015133152A1 WO2015133152A1 PCT/JP2015/001228 JP2015001228W WO2015133152A1 WO 2015133152 A1 WO2015133152 A1 WO 2015133152A1 JP 2015001228 W JP2015001228 W JP 2015001228W WO 2015133152 A1 WO2015133152 A1 WO 2015133152A1
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- Prior art keywords
- film
- organic
- zeolite
- hygroscopic
- moisture absorption
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- 239000012528 membrane Substances 0.000 title claims abstract description 46
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 108
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- 230000032900 absorption of visible light Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/351—Thickness
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
Definitions
- the present invention relates to a hygroscopic film, a waterproof film using the film, and an organic EL (Electroluminescence) device.
- WVTR water vapor transmission rate
- this hygroscopic film or waterproof film is used in the configuration of the organic EL device, it is possible to prevent deterioration of the organic light emitting diode (OLED) that is easily affected by moisture (for example, see Patent Documents 1 and 2). .
- the desiccant includes a chemical desiccant that chemically reacts with moisture absorption (including deliquescence) and a physical desiccant that does not generate a chemical reaction.
- the chemical desiccant is, for example, calcium oxide, calcium chloride, sodium hydroxide, potassium hydroxide, diphosphorus pentoxide, copper sulfate, etc., and the moisture absorption rate or maximum moisture absorption rate (per unit mass of the desiccant in the dry state) Excellent moisture content).
- the physical desiccant is, for example, silica gel, aluminum oxide, zeolite, etc., and the moisture absorption is reversible and stable, is easy to handle because it does not generate heat or change in volume, and is excellent in cost.
- the desiccant is colored and scatters and absorbs visible light, so that the moisture absorption film containing the desiccant has low light transmittance. Therefore, when it is necessary to visually recognize the shape and color of the substance covered with the moisture absorption film, such as the light emission of the OLED, the pattern of the building material, and the state of food, a general moisture absorption film cannot be used.
- moisture-absorbing membranes with a chemical desiccant with a small particle size require strict humidity control and moisture-proof packaging at the time of manufacture, which increases manufacturing costs and also opens moisture-proof packaging when using moisture-absorbing membranes. Later, it is necessary to use the whole amount immediately, and it is not convenient and lacks practicality.
- the hygroscopic film provided with the physical desiccant having a small particle size has the same hygroscopic ability as that of a general transparent resin and the like, and may not be practical as a hygroscopic film.
- an object of the present invention is to provide a hygroscopic film having good light transmittance and practicality, and a waterproof film and an organic EL device using the hygroscopic film.
- the moisture-absorbing film according to one embodiment of the present invention is a film-like base material and a powder form having an average particle size of 100 nm or less, and has a maximum moisture absorption rate of 10% by mass or more and is dispersed in the base material.
- Zeolite the film thickness is 500 nm or more, and the zeolite content is 0.13 g / cm 3 or more.
- the average particle diameter of the zeolite to contain is 100 nm or less, it has a favorable light transmittance.
- the hygroscopic film has a thickness of 500 nm or more, the flatness of the film is improved, and the reduction of light transmittance is suppressed.
- the hygroscopic film contains 0.13 g / cm 3 or more of zeolite having a maximum moisture absorption rate of 10% by mass or more, and can be stably and dried, and compared with a general transparent resin or the like. It has high hygroscopic ability and has practicality as a hygroscopic film.
- FIG. 1 is a schematic perspective view showing a hygroscopic film 100 according to Embodiment 1.
- FIG. FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. It is a graph which shows the correlation with the wavelength of the transmitted light, and the transmittance
- 3 is a graph showing the particle size distribution of zeolite 102.
- 4 is a schematic cross-sectional view showing a configuration of a waterproof film 10 according to Embodiment 2.
- FIG. 5 is a schematic cross-sectional view showing a configuration of an organic EL device 1 according to Embodiment 3.
- the moisture-absorbing film according to one embodiment of the present invention is a film-like base material and a powder form having an average particle size of 100 nm or less, and has a maximum moisture absorption rate of 10% by mass or more and is dispersed in the base material.
- Zeolite the film thickness is 500 nm or more, and the zeolite content is 0.13 g / cm 3 or more.
- the average particle diameter of the zeolite to contain is 100 nm or less, it has a favorable light transmittance.
- the hygroscopic film has a thickness of 500 nm or more, the flatness of the film is improved, and the reduction of light transmittance is suppressed.
- the hygroscopic film contains 0.13 g / cm 3 or more of zeolite having a maximum moisture absorption rate of 10% by mass or more, and can be stably and dried, and compared with a general transparent resin or the like. It has high hygroscopic ability and has practicality as a hygroscopic film.
- the hygroscopic membrane according to another aspect of the present invention has a maximum moisture absorption rate of 15% by mass or more. Since the hygroscopic film according to the above aspect has a very high hygroscopic ability, the practicality is further improved.
- the moisture absorption film according to another aspect of the present invention is the above-described aspect, wherein the zeolite is formed by either a build-up method or a method of pulverizing and recrystallizing zeolite having an average particle size of 500 nm or more. .
- the hygroscopic membrane according to another aspect of the present invention has an average particle diameter of zeolite of 10 nm or more.
- the hygroscopic membrane according to another aspect of the present invention has a ratio of the zeolite powder having an amorphous structure of 20% by volume or less.
- the hygroscopic film according to the above aspect since the hygroscopic structure is maintained and the zeolite having a high maximum moisture absorption rate is provided, the hygroscopic film has a high hygroscopic ability, and thus the practicality is further improved.
- the base material is a resin in the above aspect.
- the hygroscopic film according to the above aspect is easy to mold and has a certain degree of flexibility even after the molding, so that the usable aspect of the hygroscopic film can be expanded.
- the moisture absorption membrane which concerns on another aspect of this invention is the said aspect.
- WHEREIN The maximum moisture absorption rate of a zeolite is 40 mass% or less, a film thickness is 1 mm or less, and the content rate of a zeolite is 100 mass% or less.
- the hygroscopic film according to the above aspect has sufficient light transmittance and practicality as compared with a known hygroscopic film.
- the waterproof film which concerns on another aspect of this invention is translucent, and is provided with the sealing film which consists of an organic material or an inorganic material, and the moisture absorption film of the said aspect enclosed with the sealing film.
- the waterproof film according to the above aspect can be used in an environment where translucency and transparency are required, an environment where stability over time is required, and a narrow environment.
- the water vapor permeability of the encapsulating membrane is 1 ⁇ 10 ⁇ 5 g / (m 2 ⁇ day) or less.
- the waterproof membrane according to the above aspect has high utility.
- An organic EL device includes a base having a plane, at least one organic EL element disposed above the plane of the base, and the above-described position disposed above the organic EL element.
- a waterproof membrane according to any one of the above.
- the organic EL device according to another aspect of the present invention is the above aspect, further comprising any one of the above aspects disposed between the base and the organic EL element and in a position covering the lower side of the organic EL element.
- the base is an organic film having flexibility. In the organic EL device according to the above aspect, flexibility and a good light emission lifetime are compatible.
- the organic EL device according to another aspect of the present invention further includes the waterproof film according to any one of the above aspects, which is disposed at a position covering the side surface of the organic EL element.
- a frame can be formed.
- “upper” and “lower” do not indicate the upward direction (vertically upward) in absolute space recognition, but are defined by the relative positional relationship based on the stacking order in the stacked structure. It is. Therefore, “upper” and “lower” in the present application do not limit “upper” and “lower” at the time of manufacture or use.
- the “film” refers to a shape having a plane having a certain area and a very small thickness with respect to the plane. Therefore, it is not limited regarding the range of a raw material (resin / fiber etc.), a function (existence of flexibility), and thickness.
- Embodiment 1 a hygroscopic film 100 which is one embodiment of the present invention will be described as Embodiment 1 with reference to the drawings.
- FIG. 1 is a schematic perspective view showing a hygroscopic film 100
- FIG. 2 is a schematic cross-sectional view taken along line AA of FIG.
- the hygroscopic film 100 is a hygroscopic film, and has flexibility as shown in FIG. However, the hygroscopic film 100 does not necessarily need to have flexibility, and may be a film having high rigidity. In addition, as shown in FIG. 2, the hygroscopic film 100 includes a base material 101 and a zeolite 102.
- the base material 101 is preferably a translucent film, more preferably a transparent film.
- the base material 101 serves as a binder (binder) for the zeolite 102.
- the base material 101 is, for example, a transparent resin such as an acrylic resin, a polycarbonate resin, a polyethylene terephthalate resin, a polyvinyl chloride resin, a polystyrene resin, an epoxy resin, a silicone resin, or a polyimide resin. is there.
- the base material 101 may be a transparent sintered body such as YAG (yttrium aluminate) ceramic. Note that, as long as the entire base material satisfies translucency, not only a transparent resin but also a colored resin may be used.
- Zeolite 102 is in a powder form, and is dispersed in base material 101 as a desiccant in hygroscopic film 100.
- zeolite 102 There is no limitation in particular about the kind of zeolite 102, For example, it is LTA, FER, MWW, MFI, MOR, LTL, FAU, BEA etc. which the international zeolite society (International Zeolite Association) established.
- Hygroscopic Membrane 100 Average Particle Size of Zeolite 102
- the average particle size of the zeolite 102 is 100 nm or less.
- the particle size of general industrial zeolite is about 0.5 to several ⁇ m.
- Zeolite having the above average particle diameter can be obtained by grinding or the like.
- the particle size of the zeolite 102 for example, if it is in the form of powder, it is obtained by a dynamic light scattering method, and if it is dispersed in the base material 101, for example, a scanning electron microscope (SEM) or transmission electron microscope. It can be measured by (TEM) or the like.
- SEM scanning electron microscope
- TEM transmission electron microscope
- the maximum moisture absorption rate of the zeolite 102 is 10% by mass or more.
- the maximum moisture absorption refers to the ratio of the mass (g) of water that can be adsorbed per 1 g of zeolite in a dry state.
- the maximum moisture absorption rate can be measured by a method based on “4.1 Hygroscopicity Test” in “JIS Z 0701-1977 Packaging Silica Gel Desiccant”, for example.
- the maximum moisture absorption rate of zeolite is not easily influenced by the environment such as temperature and humidity, and the measurement conditions are not limited to the above, and may be measurement conditions under which an equivalent measurement result can be obtained.
- the zeolite 102 has the above-mentioned maximum moisture absorption rate means that the moisture absorption structure in the zeolite is not destroyed and the moisture absorption capacity is not lost.
- the pore diameter which is a hygroscopic structure, is distributed in a very small region of 0.2 to 1.0 nm. Therefore, compared with other physical desiccants having mesopores (2 to 50 nm) or macropores (50 nm or more) such as silica gel, aluminum oxide, activated carbon, etc., the influence on the hygroscopic structure is small even when the particle size is small.
- the hygroscopic structure is reconstructed by recrystallizing the crushed zeolite in a solution containing silica, alumina, etc. it can. That is, the maximum moisture absorption rate of the zeolite 102 can be adjusted within a certain range with the maximum moisture absorption rate (about 30 to 40% by mass) of a general zeolite as the upper limit.
- the maximum moisture absorption rate can be 10% or more.
- the zeolite 102 is formed by either a build-up method or a method of pulverizing and recrystallizing a general industrial zeolite (average particle size of 500 nm or more). It is preferable.
- the film thickness T shown in FIG. 2 is 500 nm or more. This can be adjusted by parameters such as the film formation time at the time of molding and the coating pressure.
- the hygroscopic film 100 may be formed by processing a film formed in advance by cutting, compression, etching, or the like, and in this case, the film thickness T is processed to be 500 nm or more.
- the content of the zeolite 102 is 0.13 g / cm 3 or more. This can be adjusted by the ratio of the base material 101 and the zeolite 102 during kneading.
- the difference in density between the base material 101 and the zeolite 102 generally, the density increases in the order of transparent resin, zeolite, and transparent sintered body).
- the mixing ratio of the base material 101 and the zeolite 102 may be calculated so that the density of the hygroscopic film 100 is obtained.
- the density of the hygroscopic film 100 can be determined by measuring the mass and volume of the hygroscopic film 100.
- the density of the base material 101 and the zeolite 102 can be obtained by, for example, analyzing physical property data, crystal structure, contained elements, etc. and specifying a specific material substance.
- the method for measuring the maximum moisture absorption rate of the zeolite 102 in the powder has been described.
- the maximum moisture absorption rate of the zeolite 102 in the moisture absorption film 100 that is, the zeolite 102 dispersed in the base material 101.
- a value obtained by multiplying the water absorption rate (g / g) by the density (g / cm 3 ) of the hygroscopic film 100 is the content (g / cm 3 ) of the zeolite 102 in the hygroscopic film 100. Just split.
- the water absorption rate of the moisture-absorbing film can be measured, for example, by a method based on “6.5 D Method” of “JIS K 7209: 2000 Plastic—How to Obtain Water Absorption Rate”. Further, the content (g / cm 3 ) of the zeolite 102 in the hygroscopic membrane 100 can be calculated from the density of the hygroscopic membrane 100, the base material 101, and the zeolite 102 as described above.
- FIG. 3 is a graph showing the correlation between the wavelength of transmitted light and the transmittance with respect to the average particle diameter of zeolite in the hygroscopic film.
- the measured value is shown.
- the examples and comparative examples differ only in the average particle diameter of zeolite, and the other configurations and specifications are the same.
- the film thickness of the hygroscopic film is 5 ⁇ m.
- the transmittance in the wavelength band of red light (about 700 nm) to green light (about 550 nm), the transmittance is a good value of 90% or more, but in the wavelength band of blue light (about 450 nm) The rate drops to 90% or less.
- the transmittance exceeds 90% even in the wavelength band of blue light (about 450 nm), which is a good value. Therefore, the hygroscopic film 100 has a good light transmittance when the average particle diameter of the zeolite is 100 nm or less.
- FIG. 4 is a graph showing the particle size distribution of the zeolite 102.
- FIG. 4 shows the particle size distribution in zeolite 102 powder having an average particle size of 100 nm or less, prepared under a plurality of conditions (samples 1 to 6). Table 1 below summarizes the distribution data for each sample. The numbers in the table are in nm units.
- d50 and d95 mean the particle diameters of the particles positioned in the order corresponding to 50% and 95% of the total number, respectively, when the particles are arranged in ascending order of particle diameter.
- the value of d95 is 5 times or less than the value of d50. That is, in the zeolite 102, the majority (95%) particles have a particle size within 5 times the median value (d50).
- the film thickness T of the hygroscopic film 100 is 500 nm or more, and the average particle diameter of the zeolite 102 (100 nm or less) is secured at least five times. That is, in the hygroscopic membrane 100, the majority of the particles of the zeolite 102 can be accommodated in the membrane, and the flatness of the membrane is improved. In the hygroscopic film 100 having high film flatness, refraction and reflection of transmitted light on the film surface, that is, reduction of light transmittance is suppressed.
- the hygroscopic film 100 has high film flatness, the quality of the laminate above the hygroscopic film 100 can be stabilized when used in a laminated structure such as an organic EL device.
- the “average” column is the arithmetic average value of the particle sizes calculated for each of Sample 1 to Sample 4.
- the arithmetic average value is approximately equal to the value of d50, that is, the median value
- the “average particle size” of the zeolite 102 may be either the arithmetic average value or the median value.
- the value of d95 is 5 times or less of the arithmetic average value
- the majority (95%) of the particles have a particle size within 5 times the arithmetic average value.
- the hygroscopic membrane 100 includes a zeolite 102 which is a physical desiccant. Therefore, the moisture absorption in the moisture absorption film 100 is stable and reversible. That is, the moisture absorption film 100 is less likely to cause a chemical reaction due to moisture absorption over time, that is, heat generation or volume change, and thus can be used stably without affecting the surroundings. Since a general resin expands in volume due to moisture absorption, the moisture-absorbing film 100 is useful in a usage mode in which a change with time is required to be small.
- the moisture absorption film 100 can be dried (dehydrated) by adjusting the temperature, humidity, and pressure of the surrounding environment. Therefore, the hygroscopic film 100 does not require strict humidity management and moisture-proof packaging, and has practicality.
- Moisture absorption capacity (moisture absorption density)
- the hygroscopic membrane 100 contains 0.13 g / cm 3 or more of zeolite 102 having a maximum moisture absorption rate of 10% by mass or more. Therefore, the mass of moisture that can be adsorbed per unit volume of the hygroscopic film 100 (hereinafter referred to as “moisture absorption density”) is 0.013 g / cm 3 or more.
- Table 2 below shows the moisture absorption density calculated from the water absorption rate and resin density of a general transparent resin.
- the hygroscopic film 100 has a higher hygroscopic density than a general transparent resin.
- the sintered body generally does not have water absorption capability, the hygroscopic film 100 has a higher moisture absorption density than the transparent sintered body.
- the moisture-absorbing film 100 has a higher amount of moisture that can absorb moisture when it occupies the same volume as compared with a general transparent resin or transparent sintered body, and has practicality.
- the moisture absorbing film 100 is useful in a usage mode in which a space where a film such as an organic EL device can be placed is limited.
- the hygroscopic film 100 has good light transmittance and practicality.
- Wavelength dependence of light transmittance As shown in FIG. 3, in the example of the moisture absorbing film 100 and its comparative example, the light transmittance of the moisture absorbing film has a wavelength dependence in the wavelength region of visible light. It can be seen that the transmittance decreases with decreasing wavelength. This is considered to be because Rayleigh scattering is dominant over Mie scattering in the light scattering in the hygroscopic film because the average particle diameter of zeolite becomes smaller than the wavelength region of visible light.
- Mie scattering is scattering by a particle having a particle size equal to or larger than the wavelength of light, and the intensity of scattering does not depend on the wavelength.
- Rayleigh scattering is scattering by particles having a particle size smaller than the wavelength of light, and the intensity of scattering is inversely proportional to the fourth power of the wavelength. Therefore, when the particle size of the scattering particles is smaller than the wavelength region of visible light, the transmittance of blue light having a short wavelength is smaller than that of red light or green light having a long wavelength.
- the transmittance of red light is about 94%, whereas the transmittance of blue light is about 86%.
- the transmittance of red light is approximately 95%, which is substantially the same as that of the comparative example, but the transmittance of blue light is approximately 90%, which is higher than that of the comparative example.
- the wavelength dependency is reduced.
- the ratio of Rayleigh scattering is further increased as the average particle size becomes smaller than in the comparative example, but this result does not agree with the prediction, and the average particle size is set to 100 nm or less. It can be seen that not only the light transmittance but also the transparency quality is improved.
- the graph of the example having an average particle size of 50 nm is almost linear with respect to the graph of the average particle size of 100 nm and 150 nm which are parabolic, and the dimension of wavelength dependence is reduced. ing. Therefore, the average particle size of the zeolite 102 is particularly preferably 50 nm or less.
- the average particle diameter of the zeolite 102 is 10 nm or more.
- the average particle diameter of the zeolite 102 is less than 10 nm, the diameter of the pores that are the hygroscopic structure of the zeolite 102 approaches, the hygroscopic structure may be destroyed, and the maximum moisture absorption rate may be reduced.
- the proportion of the zeolite 102 powder having an amorphous structure in which the hygroscopic structure (pores) is destroyed is preferably 30% by volume or less, more preferably 20% by volume or less. is there.
- the ratio of the amorphous structure falls within the above range, the maximum moisture absorption rate of the zeolite 102 is sufficiently ensured.
- the ratio of the amorphous structure can be evaluated by, for example, powder X-ray diffraction using an X-ray diffraction (XRD) apparatus.
- the incident angle and peak area derived from the crystal structure of the zeolite are confirmed, and the above X-ray diffraction pattern of the zeolite 102 used for the hygroscopic film 100 is used. What is necessary is just to compare with the peak area of an incident angle.
- the zeolite 102 preferably contains an alkaline earth metal element such as calcium or magnesium.
- alkali metal elements and alkaline earth metal elements become network modifying ions that stabilize the network structure of silicates such as zeolite.
- the network modification is ionic bonding, an alkaline earth metal element that becomes a divalent ion stabilizes the network structure more than an alkali metal element that becomes a monovalent ion. Therefore, when the zeolite 102 contains an alkaline earth metal element, a hygroscopic structure is formed or maintained even with a smaller particle size, and a sufficient maximum moisture absorption rate is ensured.
- the maximum moisture absorption rate of the zeolite 102 is more preferably 15% by mass or more.
- the moisture absorption film 100 has a moisture absorption density of about 0.020 g / cm 3 or more, which is twice the moisture absorption density of a general transparent resin, and has a very high moisture absorption capacity, so that practicality is further improved.
- the base material 101 is preferably a resin.
- the base material 101 is a resin, the hygroscopic film 100 can be easily molded and has a certain flexibility even after the molding, so that the modes in which the hygroscopic film 100 can be used can be expanded.
- the base material 101 is not limited to the exemplified transparent resin and transparent sintered body, and may be, for example, powdery zeolite having an average particle size of 100 nm or less. Since the zeolite is also transparent, can be formed into a film shape, and can disperse the zeolite 102, it is an embodiment of the base material 101. That is, in the hygroscopic membrane 100, the zeolite content is 100% by mass or less, and the zeolite content of 100% by mass means that the base material 101 is zeolite.
- the film thickness T is preferably 1 mm or less, particularly preferably 200 ⁇ m or less, and further preferably 50 ⁇ m or less. This is because the moisture absorption capacity of the moisture absorption film 100 stands out in the above range.
- the hygroscopic film 100 is not limited to a film having a single structure, but may be a film formed on a base and integrated with the base, for example.
- FIG. 5 is a schematic cross-sectional view showing the configuration of the waterproof membrane 10.
- the waterproof membrane 10 is a membrane that suppresses the penetration of moisture.
- the waterproof film 10 includes the hygroscopic film 100 according to the first embodiment, the first encapsulating film 110, and the second encapsulating film 120. Hereinafter, description of the hygroscopic film 100 is omitted.
- the first encapsulating film 110 and the second encapsulating film 120 are translucent, preferably transparent, and are films made of an organic material or an inorganic material.
- the waterproof film 10 includes the surroundings and the hygroscopic film 100. It plays a role of suppressing moisture permeation.
- first encapsulation film 110 and the second encapsulation film 120 are made of an organic material, for example, polyethylene terephthalate, polyethylene naphthalate, diacetyl cellulose, triacetyl cellulose (TAC), etc., polymethyl methacrylate, polystyrene , Acrylonitrile / styrene copolymer, polyethylene, polypropylene, polyolefin having cyclic or norbornene structure, ethylene / propylene copolymer, nylon or aromatic polyamide, imide polymer, sulfone polymer, polyether sulfone polymer, polyether ether Ketone polymer, polyphenylene sulfide polymer, vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, arylate polymer, polyoxy Methylene-based polymers, organic films such as epoxy-based polymer.
- organic material for example, polyethylene terephthalate, polyethylene naphthalate, diace
- membrane which mixed these organic materials may be sufficient.
- a transparent insulating inorganic film such as silicon nitride, silicon oxide, or silicon oxynitride, or a transparent conductive inorganic film such as indium tin oxide or indium zinc oxide (IZO) is used.
- membrane which mixed these inorganic materials may be sufficient.
- the first encapsulation film 110 and the second encapsulation film 120 are not limited to a single layer, and may be a laminate of different films.
- the hygroscopic film 100 is disposed on the first encapsulating film 110 and the upper surface is covered with the second encapsulating film 120. At this time, it is preferable that the side surface is also covered. When the side surface is also covered, the hygroscopic film 100 is sealed in the first sealing film 110 and the second sealing film 120.
- the waterproof film 10 can enhance the effect of suppressing moisture penetration as compared with an organic film, an inorganic film, or a hygroscopic film alone. Specifically, in the organic film or the inorganic film alone, it is difficult to suppress the occurrence of defects in the film formation process, and the penetration of moisture cannot be completely blocked, so that a certain amount of moisture is permeated. . On the other hand, in the waterproof film 10, moisture that has permeated through the first encapsulating film 110 or the second encapsulating film 120 is adsorbed by the hygroscopic film 100, so that the permeation of moisture is blocked until the hygroscopic capacity of the hygroscopic film 100 reaches saturation. It is possible.
- the moisture absorption film 100 alone adsorbs the surrounding moisture directly from the surface, so that the moisture absorption capacity immediately reaches saturation.
- the moisture absorption film 100 adsorbs only moisture that has passed through the first encapsulation film 110 or the second encapsulation film 120. You can extend the period.
- the waterproof film 10 includes a hygroscopic film 100 having good light transmittance, hygroscopic stability / reversibility, and high hygroscopic ability (hygroscopic density). Therefore, the waterproof film 10 also has good light transmittance, stability and reversibility of moisture absorption, and high waterproof ability even if it is thin. Thereby, the waterproof film 10 can be used in an environment where translucency and transparency are required, an environment where stability over time is required, and a narrow environment.
- the waterproof film 10 it is preferable to use a material having a dense structure and low permeability such as moisture and oxygen for the first encapsulation film 110 and the second encapsulation film 120.
- the water vapor transmission rate (WVTR) defined in “JIS K 7129: 2008 Plastic-film and sheet—How to obtain water vapor transmission rate (instrument measurement method)”. Is preferably 1 ⁇ 10 ⁇ 5 g / (m 2 ⁇ day) or less.
- the waterproof film 10 has left a significant result in the experiment mentioned later, and has high practicality.
- the first encapsulating film 110 and the second encapsulating film 120 are made of different films.
- the present invention is not limited to this.
- the hygroscopic film 100 is encapsulated in a single encapsulating film.
- the upper surface, the lower surface, and the side surfaces of the hygroscopic film 100 may be covered with different sealing films.
- one surface (upper surface, lower surface, or side surface) of the hygroscopic film 100 does not need to be covered with a single encapsulating film, and may be covered with a plurality of different encapsulating films.
- the moisture easily permeates between the interfaces of different encapsulating films, it is preferable that there are few such interfaces around the hygroscopic film 100.
- the waterproof film 10 is not only a film having a single structure, but, for example, a film formed on a base and arranged in the order of the first encapsulating film 110, the hygroscopic film 100, and the second encapsulating film 120. Also good.
- FIG. 6 is a schematic cross-sectional view showing the configuration of the organic EL device 1.
- the organic EL device 1 is a light emitting device that uses the electroluminescence effect of an organic compound, and is, for example, an organic EL display device or an organic EL lighting device.
- the organic EL device 1 includes waterproof films 10 a and 10 b corresponding to the waterproof film 10 according to Embodiment 2, a base 11, an organic EL layer 12, and a sealing material 13.
- the waterproof films 10 a and 10 b correspond to the hygroscopic films 100 a and 100 b corresponding to the hygroscopic film 100 in the waterproof film 10, the first encapsulating films 110 a and 110 b corresponding to the first encapsulating film 110, and the second encapsulating film 120.
- Second encapsulating films 120a and 120b Second encapsulating films 120a and 120b.
- the base 11 is a flat member, and is a support material on which the members are stacked in the organic EL device 1, and is a base on which the waterproof film 10a is disposed on the main surface.
- the base 11 can be made of an electrically insulating material or a semiconductor material such as silicon. Alternatively, a metal material such as aluminum or stainless steel coated with a material having electrical insulation may be used.
- the electrically insulating material examples include resins such as acrylic resins, styrene resins, polycarbonate resins, epoxy resins, polyethylene resins, polyester resins, polyimide resins, and silicone resins.
- the material may be, for example, glass such as soda glass, quartz glass, borosilicate glass, or metal oxide such as aluminum oxide.
- the base 11 has light reflectivity or light transmittance according to the light extraction direction of the organic EL device 1.
- Organic EL layer 12 is disposed on the waterproof film 10a, that is, above the main surface of the base 11, and is covered with the waterproof film 10b, and has at least one OLED inside.
- the organic EL layer 12 includes a plurality of OLEDs arranged in a two-dimensional direction along the main surface of the base 11.
- the organic EL layer 12 has one or several OLEDs formed over the entire layer. Therefore, the organic EL device 1 includes at least one OLED disposed above the main surface of the base 11.
- the organic EL layer 12 When the organic EL device 1 is an active matrix organic EL display device, the organic EL layer 12 also has a TFT as a driving element of the OLED. Furthermore, the organic EL layer 12 may have a bank or the like that partitions the OLED. A known material can be used for the constituents of the organic EL layer 12 such as OLED, TFT, and bank.
- the sealing material 13 is a member that protects the organic EL layer 12 and the waterproof film 10b from physical impacts, and is disposed on the waterproof film 10b.
- the same material as the base 11 can be used for the sealing material 13.
- the sealing material 13 is preferably a flexible organic film.
- the sealing material 13 has light transmittance or light reflectivity according to the light extraction direction of the organic EL device 1.
- the waterproof film 10a is disposed between the base 11 and the organic EL layer 12 at a position covering the lower surface of the organic EL layer 12, and the waterproof film 10b. However, it is arrange
- the organic EL device 1 since the OLED that is likely to be deteriorated by moisture is sealed by the waterproof films 10a and 10b having good light transmittance, the deterioration of the OLED is prevented without hindering the visibility of light emission. Is suppressed. Moreover, since the organic EL device 1 includes the waterproof films 10a and 10b in which heat generation and volume change due to moisture absorption are suppressed, the organic EL device 1 is stable over time. Further, since the organic EL device 1 includes the waterproof films 10a and 10b having a high waterproof capability even if it is thin, the organic EL device 1 can be thinned.
- the base 11 is not required to be waterproof. Therefore, a flexible film such as an organic film such as a resin can be used for the base 11. That is, in the organic EL device 1, flexibility and a good light emission lifetime are compatible.
- the luminous efficiency of the OLED can be improved by providing the hygroscopic films 100a and 100b.
- the luminous efficiency of blue light becomes a bottleneck to define the luminous efficiency.
- the light transmittance of blue light is particularly improved when the average particle diameter of the contained zeolite 102 is 100 nm or less. Therefore, in the organic EL device 1, the light extraction efficiency of blue light that defines the light emission efficiency can be improved, and the overall light emission efficiency can be improved.
- the average particle diameter of the zeolite 102 contained in the hygroscopic films 100a and 100b is 50 nm or less.
- the wavelength dependence of the transmittance is almost a straight line, and it is easy to adjust the luminance for each emission color of the OLED.
- the upper surface and the side surface of the organic EL layer 12 are covered with the single waterproof film 10b.
- the waterproof film 10b may be at a position that covers at least the upper surface of the organic EL layer 12.
- the side surface of the organic EL layer 12 may be covered with the waterproof film 10 according to Embodiment 2, for example, or may be covered with a curable resin containing a desiccant.
- the side surface of the organic EL layer 12 is covered with a waterproof film 10 having a high waterproof capability even if it is thin, so that the sealing structure on the side surface side can be made thinner, so-called a frame. is there. In this case, all of the lower surface, the upper surface, and the side surface of the organic EL layer 12 may be covered with a single waterproof film 10.
- the waterproof films 10a and 10b are in direct contact with the organic EL layer 12.
- the present invention is not limited to this, and another member is sandwiched between the waterproof films 10a and 10b and the organic EL layer 12. Also good.
- the sealing material 13 is not an essential configuration and may be configured without this.
- the entire surface of the organic EL layer 12 is covered with the waterproof films 10a and 10b.
- the present invention is not limited to this.
- the base 11 is made of a material having low moisture permeability such as glass.
- a configuration in which only the upper surface and the side surface are covered with a waterproof film may be employed.
- the lower surface and the side surface of the organic EL layer 12 are covered with the waterproof films 10a and 10b having good light transmittance.
- the waterproof film 10a or 10b the opposite side may be covered with a waterproof film having a low light transmittance.
- Embodiment 3 demonstrated the organic EL apparatus 1 provided with OLED which is easy to deteriorate with a water
- membrane 10 is not restricted to this.
- the waterproof film 10 is protected by a structure that covers an electric circuit element such as an oxide TFT, an organic TFT, a battery element, a photoelectric conversion element, or food.
- a configuration in which the moisture absorption film 100 covers the side surfaces of wall materials, joinery, and the like, and a configuration in which the humidity in the building or the package is adjusted by a configuration in which the hygroscopic film 100 is disposed in a package of food or the like can be considered.
- the film thickness of the hygroscopic films 100 a and 100 b is 500 nm, and the content of the zeolite 102 in the hygroscopic films 100 a and 100 b is 0.13 g / cm 3 .
- the first encapsulating films 110a and 110b and the second encapsulating films 120a and 120b are all silicon nitride films having a water vapor permeability of 1 ⁇ 10 ⁇ 5 g / (m 2 ⁇ day).
- Example 1 in which the maximum moisture absorption rate of the zeolite 102 contained in the moisture absorption films 100a and 100b was 10% by mass
- Example 2 in which the maximum moisture absorption rate was 15% by mass.
- the comparative example which is the same structure and specification as Example 1 and Example 2 was created except the maximum moisture absorption of the zeolite being 5 mass%.
- the organic EL device is placed in a high-temperature and high-humidity environment at a temperature of 60 ° C. and a humidity of 90%, and the OLED is allowed to emit light continuously. The occurrence of spots) was observed.
- the OLED since the portion of the light emitting surface that has deteriorated due to moisture becomes a non-light emitting point, it can be seen that the hygroscopic ability of the hygroscopic film and the waterproof ability of the waterproof film have reached the limit at the location where the non-light emitting point occurs. .
- the above evaluation corresponds to a 20-fold accelerated test for an environment of temperature 25 ° C. and humidity 50%, and corresponds to evaluation of a light emission lifetime of about 2 years.
- Example 3 As shown in Table 3, in the comparative example, a non-light emitting point having a size visible in the light emitting surface was observed. On the other hand, in Example 1, a non-light emitting point was observed in the magnified observation, but a non-light emitting point having a size that can be visually recognized was not observed, and the light emission quality was at a satisfactory level. Furthermore, in Example 2, no non-light emitting point was observed even in magnified observation, and no light emitting point was generated at all.
- the organic EL device 1 has a light emission life of about 2 years under actual use conditions.
- this result proves that the moisture absorption film 100 and the waterproof film 10 are useful under actual use conditions.
- the above evaluation only uses light emission / non-light emission of the organic EL device for the determination of moisture penetration, and also serves to evaluate the moisture absorption capability of the moisture absorption membrane 100 and the waterproof capability of the waterproof membrane 10 other than the organic EL device. That is, the above evaluation shows that the hygroscopic film 100 and the waterproof film 10 are practical films.
- the hygroscopic film and the waterproof film according to the present invention can be widely used as constituent materials and packaging materials for electronic devices, building materials, foods, and the like.
- the organic EL device according to the present invention can be widely used in devices such as television devices, commercial displays, personal computers, portable electronic devices, and other various electronic devices having a display function.
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Abstract
Description
本発明の一態様に係る吸湿膜は、膜状の母材と、平均粒径が100nm以下の粉体状であって、最大吸湿率が10質量%以上であり、母材中に分散されたゼオライトと、を備え、膜厚が500nm以上であり、ゼオライトの含有量が0.13g/cm3以上である。
以下では、実施の形態1として、本発明の一態様である吸湿膜100について、図面を用いながら説明する。
吸湿膜100の概略構成を図1及び図2を用いて説明する。図1は吸湿膜100を示す模式斜視図であり、図2は図1のA-A線における模式断面図である。
母材101は、好ましくは透光性、さらに好ましくは透明性を有する膜状であって、吸湿膜100においては、ゼオライト102の結合剤(バインダ)としての役割を果たす。母材101は、具体的には例えば、アクリル系樹脂、ポリカーボネート系樹脂、ポリエチレンテレフタレート系樹脂、ポリ塩化ビニル系樹脂、ポリスチレン系樹脂、エポキシ系樹脂、シリコーン系樹脂、ポリイミド系樹脂などの透明樹脂である。また、母材101は、例えばYAG(アルミン酸イットリウム)セラミックなどの透明焼結体であってもよい。なお、母材全体として透光性を満たせば、透明の樹脂に限らず、有色の樹脂を用いても良い。
ゼオライト102は、粉体状であって、吸湿膜100においては、乾燥剤として母材101中に分散されている。ゼオライト102の種類については、特に限定はなく、例えば、国際ゼオライト学会(International Zeolite Association)が定めた、LTA、FER、MWW、MFI、MOR、LTL、FAU、BEAなどである。
(1)ゼオライト102の平均粒径
吸湿膜100では、ゼオライト102の平均粒径が100nm以下である。一般的な工業用ゼオライトの粒径は0.5~数μm程度であるが、例えば、シリカ、アルミナ、アンモニウム塩などを用いたゼオライトの水熱合成(ビルドアップ法)や、上記工業用ゼオライトの粉砕などにより、上記平均粒径のゼオライトを得ることができる。
吸湿膜100では、ゼオライト102の最大吸湿率が10質量%以上である。ここで、最大吸湿率とは、乾燥状態のゼオライト1gあたりに吸着可能な水分の質量(g)の割合を指す。なお、最大吸湿率は、具体的には、例えば、「JIS Z 0701―1977 包装用シリカゲル乾燥剤」の「4.1 吸湿性試験」に準拠した方法により測定可能である。ただし、一般にゼオライトの最大吸湿率は、温度や湿度などの環境に左右されにくく、測定条件は上記に限定されず、同等の測定結果が得られる測定条件であってもよい。
吸湿膜100では、図2に示す膜厚Tが500nm以上である。これは、成形時の成膜時間や塗布圧などのパラメータによって調整することが可能である。なお、吸湿膜100は、あらかじめ形成した膜を切断・圧縮・エッチングなどの加工により成形してもよく、この場合は、膜厚Tが500nm以上となるように加工する。
吸湿膜100では、ゼオライト102の含有量が0.13g/cm3以上である。これは、母材101とゼオライト102との混練時の比率によって調整することができる。なお、吸湿膜100の状態で、上記含有量を求めるには、例えば、母材101とゼオライト102との密度の違い(一般的に密度は、透明樹脂、ゼオライト、透明焼結体の順に大きい。)を利用すればよい。具体的には、例えば、吸湿膜100の密度となるような、母材101とゼオライト102との混合比率を算出すればよい。吸湿膜100の密度は吸湿膜100の質量と体積との測定により求めることが可能である。母材101、ゼオライト102の密度は、例えば、物性データ、結晶構造、含有元素などを分析して具体的な材料物質を特定すれば求めることができる。
上記では、ゼオライト102の最大吸湿率について、粉体における測定方法を説明したが、吸湿膜100中のゼオライト102、すなわち母材101中に分散された状態のゼオライト102の最大吸湿率も算出することは可能である。これは、例えば、乾燥状態の吸湿膜の1gが吸着可能な水分の質量(g)である吸水率を基に算出すればよい。具体的には、例えば、吸水率(g/g)に、吸湿膜100の密度(g/cm3)を乗じた値を、吸湿膜100中のゼオライト102の含有量(g/cm3)で割ればよい。
(1)光透過率
図3は、吸湿膜中のゼオライトの平均粒径に対する透過光の波長と透過率との相関を示すグラフである。図3では、吸湿膜100の実施例としてゼオライトの平均粒径が50nm又は100nmである吸湿膜と、比較例としてゼオライトの平均粒径が150nmである吸湿膜とにおける、光の波長ごとの透過率の測定値を示している。なお、実施例及び比較例は、ゼオライトの平均粒径のみが異なり、その他の構成・仕様は同一である。また、吸湿膜の膜厚は5μmとしている。
吸湿膜100は、物理的乾燥剤であるゼオライト102を備える。したがって、吸湿膜100における吸湿は、安定的かつ可逆的である。つまり、吸湿膜100では、経時的な吸湿による化学反応、すなわち発熱や体積変化を起こしにくいため、周囲に影響を与えることなく安定的に使用できる。一般的な樹脂は吸湿により体積が膨張することから、吸湿膜100は、経時変化が小さいことを要求されるような使用態様において有用である。
吸湿膜100は、最大吸湿率が10質量%以上であるゼオライト102を0.13g/cm3以上含有する。したがって、吸湿膜100の単位体積当たりに吸着可能な水分の質量(以下、「吸湿密度」という。)は、0.013g/cm3以上となる。
(1)光透過率の波長依存性
図3に示すように、吸湿膜100の実施例及びその比較例では、可視光の波長領域において、吸湿膜の光の透過率が波長依存性を有しており、波長が小さいほど、透過率が減少していることが分かる。これは、ゼオライトの平均粒径が可視光の波長領域より小さくなることで、吸湿膜中の光の散乱において、ミー散乱よりもレイリー散乱が支配的になるためであると考えられる。
吸湿膜100では、ゼオライト102の平均粒径が10nm以上であることが好ましい。
ゼオライト102の平均粒径が10nm未満になると、ゼオライト102の吸湿構造である細孔の径に近づき、吸湿構造が破壊されて最大吸湿率が低下する可能性がある。
吸湿膜100では、ゼオライト102の最大吸湿率が、15質量%以上であることがさらに好ましい。この場合、吸湿膜100は、その吸湿密度が約0.020g/cm3以上と一般的な透明樹脂の吸湿密度の2倍以上となり、きわめて高い吸湿能力を有するため、さらに実用性が向上する。
以下では、実施の形態2として、本発明の一態様に係る防水膜10について、図5を用いて説明する。図5は防水膜10の構成を示す模式断面図である。
防水膜10は、水分の浸透を抑制する膜である。防水膜10は、実施の形態1に係る吸湿膜100と、第1封入膜110と、第2封入膜120とを備える。以下では、吸湿膜100については説明を省略する。
防水膜10では、上記構成により、有機膜、無機膜や吸湿膜単体と比較して水分の浸透を抑制する効果を高めることができる。具体的には、有機膜や無機膜単体では、成膜プロセス上、欠陥の発生を抑制することが難しく、水分の浸透を完全には遮断することができないため、一定の水分を透過させてしまう。一方、防水膜10では、第1封入膜110又は第2封入膜120を透過した水分が吸湿膜100によって吸着されるため、吸湿膜100の吸湿容量が飽和に達するまで、水分の浸透を遮断することが可能である。
防水膜10では、第1封入膜110及び第2封入膜120に、緻密な構造を有し水分や酸素などの透過性が低い材料を用いることが好ましい。具体的には、第1封入膜110及び第2封入膜120では、「JIS K 7129:2008 プラスチック-フィルム及びシート-水蒸気透過度の求め方(機器測定法)」に定める水蒸気透過度(WVTR)が、1×10-5g/(m2・day)以下であることが好ましい。このとき、防水膜10は、後述する実験において有意な結果を残しており、高い実用性を有する。
以下では、実施の形態3として、本発明の一態様に係る有機EL装置1について、図6を用いて説明する。図6は有機EL装置1の構成を示す模式断面図である。
有機EL装置1は、有機化合物の電界発光効果を利用した発光装置であって、例えば有機EL表示装置や有機EL照明装置である。有機EL装置1は、実施の形態2に係る防水膜10に相当する防水膜10a、10bと、ベース11と、有機EL層12と、封止材13とを備える。なお、防水膜10a、10bは、防水膜10における吸湿膜100に相当する吸湿膜100a、100bと、第1封入膜110に相当する第1封入膜110a、110bと、第2封入膜120に相当する第2封入膜120a、120bとをそれぞれ備える。
ベース11は、平板状の部材であって、有機EL装置1において、各部材を積層する支持材であり、その主面上に防水膜10aを配置する下地である。ベース11には、電気絶縁性を有する材料又はシリコンなどの半導体材料を用いることができる。また、電気絶縁性を有する材料をコーティングしたアルミニウムやステンレスなどの金属材料などを用いてもよい。
有機EL層12は、防水膜10a上、すなわちベース11の主面の上方に配置され、防水膜10bに覆われた層であって、内部に少なくとも一つのOLEDを有する。例えば、有機EL装置1が有機EL表示装置である場合、有機EL層12は、ベース11の主面に沿う二次元方向に配列された複数のOLEDを有する。また、例えば、有機EL装置1が有機EL照明装置である場合、有機EL層12は、層全体に渡って形成された1つ又は数個のOLEDを有する。したがって、有機EL装置1は、ベース11の主面の上方に配置された少なくとも1つのOLEDを備える。
封止材13は、有機EL層12及び防水膜10bを物理的な衝撃などから保護する部材であって、防水膜10b上に配置される。封止材13には、ベース11と同じ材料を用いることができる。またベース11と同様に、封止材13は、柔軟性を有する有機膜であることが好ましい。また、封止材13は、有機EL装置1の光取出し方向に応じて、光透過性又は光反射性を有することが好ましい。
有機EL装置1では、防水膜10aが、ベース11と有機EL層12との間であって、有機EL層12の下面を覆う位置に配置され、防水膜10bが、有機EL層12の上面及び側面を覆う位置に配置されている。すなわち、有機EL装置1では、有機EL層12が防水膜10a、10bによって封止された構造を有する。
有機EL装置1では、ベース11上に防水膜10aを備えることで、ベース11には防水性が要求されない。よって、ベース11に柔軟性を有する膜、例えば樹脂などの有機膜を用いることができる。すなわち、有機EL装置1では、柔軟性と良好な発光寿命とが両立する。
以下に、実施の形態3に係る有機EL装置1の実施例を作成し、発光寿命評価を行った結果について説明する。なお、本結果は、実施の形態1に係る吸湿膜100の実施例による吸湿能力と、実施の形態2に係る防水膜10の実施例による防水能力との評価も兼ねる。
評価に用いた有機EL装置の仕様は以下の通りである。まず、図6に示す有機EL装置1の構成において、吸湿膜100a、100bの膜厚を500nm、吸湿膜100a、100b中のゼオライト102の含有量を0.13g/cm3とした。また、第1封入膜110a、110b及び第2封入膜120a、120bは、すべて水蒸気透過度が1×10-5g/(m2・day)の窒化シリコン膜とした。
評価では、上記有機EL装置を温度60℃、湿度90%の高温高湿環境に置き、OLEDを連続的に発光させ、1000時間経過後に、当該OLEDの発光面内の非発光点(ダークスポット)の発生を観測した。OLEDでは、発光面のうち、水分によって劣化した部分が非発光点となることから、非発光点の発生した箇所において、吸湿膜の吸湿能力及び防水膜の防水能力が限界に達したことが分かる。なお、上記の評価は、温度25℃、湿度50%環境に対する20倍加速試験に相当し、約2年の発光寿命を評価したことに相当する。
評価の結果を以下の表3に示す。
10、10a、10b 防水膜
11 ベース
12 有機EL層
100、100a、100b 吸湿膜
101 母材
102 ゼオライト
110、110a、110b 第1封入膜
120、120a、120b 第2封入膜
T 膜厚
Claims (12)
- 膜状の母材と、
平均粒径が100nm以下の粉体状であって、最大吸湿率が10質量%以上であり、前記母材中に分散されたゼオライトと、
を備え、
膜厚が500nm以上であり、
前記ゼオライトの含有量が0.13g/cm3以上である、
吸湿膜。 - 前記ゼオライトの最大吸湿率が、15質量%以上である、
請求項1に記載の吸湿膜。 - 前記ゼオライトが、ビルドアップ法又は平均粒径500nm以上のゼオライトを粉砕して再結晶化させる方法のいずれかで形成されたものである、
請求項1又は請求項2に記載の吸湿膜。 - 前記ゼオライトの平均粒径が、10nm以上である、
請求項1から請求項3のいずれかに記載の吸湿膜。 - 前記ゼオライトの粉体のうち、非晶質構造を示すものの割合が20体積%以下である、
請求項1から請求項4のいずれかに記載の吸湿膜。 - 前記母材が樹脂である、
請求項1から請求項5のいずれかに記載の吸湿膜。 - 前記ゼオライトの最大吸湿率が、40質量%以下であり、
前記膜厚が1mm以下であり、
前記ゼオライトの含有率が100質量%以下である、
請求項1から請求項6のいずれかに記載の吸湿膜。 - 透光性を有し、有機材料又は無機材料からなる封入膜と、
前記封入膜に封入された請求項1から請求項7のいずれかに記載の吸湿膜と、
を備える、
防水膜。 - 前記封入膜の水蒸気透過度が1×10-5g/(m2・day)以下である、
請求項8に記載の防水膜。 - 平面を有するベースと、
前記ベースの平面の上方に配置された少なくとも1つの有機EL素子と、
前記有機EL素子の上方を覆う位置に配置された請求項8又は請求項9のいずれかに記載の防水膜と、
を備える、
有機EL装置。 - さらに、前記ベースと前記有機EL素子との間であって、前記有機EL素子の下方を覆う位置に配置された請求項8又は請求項9のいずれかに記載の防水膜を備え、
前記ベースが、柔軟性を有する有機膜である、
請求項10に記載の有機EL装置。 - さらに、前記有機EL素子の側面を覆う位置に配置された請求項8又は請求項9のいずれかに記載の防水膜を備える、
請求項10又は請求項11に記載の有機EL装置。
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JP2016122501A (ja) * | 2014-12-24 | 2016-07-07 | パナソニックIpマネジメント株式会社 | 有機発光デバイスおよび有機表示装置 |
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JP2019104892A (ja) * | 2017-12-08 | 2019-06-27 | パナソニックIpマネジメント株式会社 | 紫外線硬化性樹脂組成物、有機el発光装置の製造方法及び有機el発光装置 |
JP2019112553A (ja) * | 2017-12-25 | 2019-07-11 | 三菱ケミカル株式会社 | 樹脂複合材フィルム及び電子デバイス |
JP2020012048A (ja) * | 2018-07-17 | 2020-01-23 | パナソニックIpマネジメント株式会社 | 紫外線硬化性樹脂組成物、有機el発光装置の製造方法及び有機el発光装置 |
JP7117583B2 (ja) | 2018-07-17 | 2022-08-15 | パナソニックIpマネジメント株式会社 | 紫外線硬化性樹脂組成物、有機el発光装置の製造方法及び有機el発光装置 |
JPWO2020017221A1 (ja) * | 2018-07-18 | 2021-08-12 | パナソニックIpマネジメント株式会社 | ガラスパネルユニット、及びガラスパネルユニットの製造方法 |
Also Published As
Publication number | Publication date |
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US20160359139A1 (en) | 2016-12-08 |
WO2015132824A1 (ja) | 2015-09-11 |
JPWO2015133152A1 (ja) | 2017-04-06 |
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