WO2020175207A1 - ガラスフィルム - Google Patents
ガラスフィルム Download PDFInfo
- Publication number
- WO2020175207A1 WO2020175207A1 PCT/JP2020/006016 JP2020006016W WO2020175207A1 WO 2020175207 A1 WO2020175207 A1 WO 2020175207A1 JP 2020006016 W JP2020006016 W JP 2020006016W WO 2020175207 A1 WO2020175207 A1 WO 2020175207A1
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- WIPO (PCT)
- Prior art keywords
- glass film
- film
- glass
- less
- cleaning
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3405—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of organic materials
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/0075—Cleaning of glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
Definitions
- the present invention relates to a flexible glass film.
- Optical devices such as display devices, lighting devices, and solar cells are becoming lighter and thinner.
- glass materials are being replaced with plastic materials, but it is difficult for plastic materials to achieve high impact resistance and gloss (glare) like glass.
- Patent Document 1 Japanese Patent Laid-Open No. 2 0 1 1-1 6 7 08
- the glass film manufacturing process requires melting, molding, and cooling, as in the sheet glass manufacturing process, and it is difficult to increase cleanliness because of large equipment. Further, glass is insulative and easily charged. Therefore, many foreign substances are attached to the glass film due to the manufacturing process.
- the force may be locally applied to the part where the foreign matter adheres, and the glass film may crack.
- An object of the present invention is to provide a glass film which is less likely to cause an optical defect even when used for producing an optical device and has excellent handleability.
- the present invention relates to a glass film having a thickness of 150 or less and having flexibility.
- the glass film has a first main surface and a second main surface.
- the glass film may have a long shape having a length of 100 or more.
- the number of adhered foreign matters of 5 or more is 13 0 pieces/ 2 or more and the number of adhered foreign matters of 100 or more is 10 pieces/ 2 or less.
- the number of attachment foreign matter 1 0 0 less than Rei_1 5 Rei_1 above 1 3 0-1 2 0 0/2 is preferred.
- the number of adhered foreign matters of 5 or more and 50 or less is preferably 100 / 2 or more, and the number of adhered foreign matters of more than 50 and less than 100 is 300 The number of pieces/ two or less is preferable.
- the number of adhered foreign matters on at least one surface is within a predetermined range, it is possible to suppress the occurrence of optical defects caused by adhered foreign matters and the cracking of the glass film, and to make the glass film slippery. It can be added to ensure good handling.
- FIG. 1 is a cross-sectional view showing a laminated constitution example of an optical laminated body.
- the glass film is a flexible sheet-shaped glass material.
- the glass material forming the glass film include soda lime glass, borate glass, aluminosilicate glass, and quartz glass.
- Alkali metal components of glass materials (eg Yes! The content of _I 2 0) is preferably 15% by weight or less, more preferably 10% by weight or less.
- the thickness of the glass film is preferably 150 or less, more preferably 120 or less, and further preferably 100 or less.
- the thickness of the glass film is preferably 10 or more,
- Glass film wavelength 550 The light transmittance at
- the density of glass film is 2.
- the method for forming the glass film is not particularly limited, and any appropriate method can be adopted.
- a mixture containing a main raw material such as silica or alumina, an antifoaming agent such as mirabilite or antimony oxide, and a reducing agent such as carbon is melted at a temperature of 1400 to 1600 °.
- the glass film is manufactured by cooling.
- the method for forming glass into a sheet include a slot down draw method, a fusion method, a float method and the like.
- the glass film may be single-wafer or long.
- the glass film has a long shape from the viewpoint that it can be applied to the mouth-to-roll process and improves the productivity of the device and its constituent members (for example, the optical laminate described later). ⁇ 02020/175207 4 (:171?2020/006016
- the long glass film is provided as a mouth-shaped winding body.
- the length of the long glass film is preferably 1001 or more, more preferably 3001 or more, and further preferably 500 or more.
- the width of the long glass film is, for example, 50 to 300 0 111 111, and preferably Is.
- the number of adhering foreign matters on at least one main surface is within a predetermined range.
- the number of foreign substances of 5 or more attached to the surface of the glass film is 130 / 2 or more, and the number of foreign substances of 100 or more attached to the surface of the glass film is 10 / 2 or less.
- the number of adhering foreign substances is counted by observing the glass film surface with an optical microscope, and the maximum diameter of the foreign substances is taken as the size of the foreign substances.
- the foreign matter of 100 or more is generated when the glass film is bonded to another member.
- the foreign substances may adhere to the portion where the foreign substances are attached when the glass film is transported by the mouth toe roll process or laminated with other members. Local force may be applied, causing cracks and cracks in the glass film, which may cause damage. Therefore, it is preferable that the number of foreign matters of 100 or more is as small as possible. 1 0_Rei or more deposition number of foreign matters is preferably 7/2 or less,
- the number of adhered foreign substances above 150 is 2/
- the number of adhered foreign substances of less than 100 is also small.
- the surface of the glass film is a resin film ⁇ 02020/175207 5 (:171?2020/006016
- the smoothness of the glass film is higher than that of the glass film, blocking of the glass film is likely to occur when the glass film is stacked or when the glass film is rolled up into a mouth shape when foreign matter is not attached to the surface of the glass film. If blocking occurs in the roll-shaped roll, stress may be locally applied when the glass film is unwound from the roll, and the glass film may be broken. Also, if no foreign matter is attached to the surface of the glass film, it may be difficult to convey the glass film by mouth-to-roll because the slipperiness is low.
- the present invention there are 130 or more adhered foreign substances on the surface of the glass film. Since fine foreign matter is formed on the surface of the glass film by the adhered foreign matter, slipperiness is imparted to the glass film, and blocking, conveyance failure, winding failure, etc. can be prevented. From the viewpoint of sliding property, 5 or more deposition number of foreign matters of the glass film surface, 1 5 0/2 or more, more preferably 2 0 0/2 or more, more preferably 2 3 0/2 or more ..
- the upper limit of the number of adhered foreign matters of 5 or more is not particularly limited. However, as the total number of adhered foreign substances increases, the number of coarse foreign substances of 100 or more tends to increase.
- 5 01 or more deposition number of foreign matters is preferably 1 2 0 0/2 or less, 1 0 0 0/2 hereinafter more , more preferably from 8 0 0/2 or less, 6 0 0/2 hereinafter are particularly preferred. Further, even if the adhered foreign matter is 100 or less, if the existing density is high, it may cause an optical defect or breakage of the glass film. Therefore, the number of the adhered foreign matter is preferably within the above range. ..
- the glass film of the present invention has 100 or more coarse adhered foreign matters, so that the occurrence of optical defects and the breakage of the glass film during handling are suppressed, and the adherence of 5 or more is prevented. Since the number of foreign matters is within the predetermined range, slipperiness is imparted and the handling property of the glass film can be secured.
- 5 or 1 0 adheres number of foreign matters of less than 0, 1 3 0-1 2 0 0/2 preferably, 1 5 0-1 0 0 0/2 is more preferable, 2 0 0-8 0 0 / ⁇ 02020/175207 6 ((171?2020/006016
- 0 12 is more preferable, and 230 to 600 pieces/0 12 is particularly preferable.
- adhered foreign matters of 5 or more and less than 100 from the viewpoint of preventing the glass film from cracking due to the adhered foreign matters during transport, etc., while providing the glass film with slipperiness by forming fine irregularities.
- the contribution of adhered foreign matters of 5 to 50 is particularly large.
- the number of adhered foreign matters of 5 to 50 on the glass film surface is
- the number of adhering foreign matters exceeding 50 and less than 100 is preferably 300 or less/2, more preferably 200/two or less, still more preferably 150// 2 or less.
- the number of adhering foreign substances of more than 50 and less than 100 can be 30 or more, 40 or more, or 50 or more.
- Glass films are often manufactured in an environment where the cleanliness is lower than when manufacturing optical devices such as display devices and optical device components. Therefore, many foreign substances adhere to the glass film immediately after manufacturing. In order to reduce the number of adhered foreign substances of 100 or more to 10 / 2 or less, it is preferable to wash the glass film in a clean environment.
- the method for cleaning the glass film is not particularly limited as long as it can reduce the number of adhered foreign substances to the above range, and may be a dry method or a wet method.
- the dry method include blowing air, decomposing foreign matter by irradiation with IIV and ozone, removing foreign matter with an adhesive port or an adhesive sheet, brush cleaning, and blast cleaning.
- Wet cleaning can be performed with pure water, a cleaning solution such as acid or alkali, or an organic solvent, with a liquid such as a cleaning solution adhered to the surface of the glass film, or with the glass film immersed in the liquid. Cleaning with a brush or sponge, ultrasonic cleaning, two-fluid cleaning, etc.
- the glass film has higher hardness than the plastic film and is less likely to be scratched, a method of removing the adhering foreign matter by a physical impact force can be applied to the cleaning of the glass film. Above all, since it is possible to appropriately remove the adhering foreign matter, brush cleaning or blast cleaning is preferable as the dry cleaning, and two-fluid cleaning is preferable as the wet cleaning.
- a contact-type web cleaner provided with a rotating brush is used for brush cleaning.
- a mechanism for removing foreign matters adhering to the brush by a suction method or the like, from the viewpoint of keeping the cleaning quality constant.
- Dry ice blasting is preferable as the blast cleaning.
- dry ice blast a glass film is sprayed with dry ice pellets at high speed.
- dry ice enters between the glass film and the adhering foreign matter and is rapidly vaporized, the volume expands rapidly, and due to this volume change, the adhering foreign matter can be removed.
- the blast particles do not remain as foreign matter.
- the two-fluid cleaning is a process of supplying a mixed fluid, which is a mixture of gas and liquid, from the two-fluid nozzle to the surface of the glass film. Droplets in the mixed fluid collide with the surface of the glass film, and the impact can remove the foreign matter adhering to the surface of the glass film. Water and air are generally used as the liquid and gas for the two-fluid cleaning.
- the gas carrier gas
- nitrogen, oxygen, carbon dioxide, hydrogen, ozone, argon or the like may be used as the gas (carrier gas).
- the carrier gas pressure of the two-fluid nozzle is 0.1 to ⁇ .
- the liquid pressure is about 0.05 to ⁇ . Degree is preferred ⁇ 02020/175207 8 ((171?2020/006016
- the washing is preferably carried out continuously while the glass film is conveyed by a roll toe roll.
- the washing may be performed on only one side of the glass film, or both sides of the glass film may be washed.
- the cleaning method for the _ side and the cleaning method for the other side may be the same or different.
- the cleaning When the cleaning is performed with a mouth toe roll, the cleaning may be performed offline or inline.
- a resin layer or the like is formed on the surface of the glass film after cleaning, after the glass film is cleaned and before it is wound into a mouth shape.
- off-line cleaning the glass film after cleaning is wound into a roll.
- a protective film Before the glass film after cleaning is wound into a mouthpiece, a protective film may be temporarily attached for the purpose of preventing reattachment of foreign matter to the cleaning surface. As mentioned above, blocking the glass film is suppressed by controlling the number of foreign substances adhering to the surface of the glass film. Therefore, the glass film can be used as a single layer (single layer) without temporarily attaching a protective film or the like. It can also be wound into a reel.
- the glass film has high hardness and excellent impact resistance, minute cracks are likely to occur at the end portion (end surface).
- the stress concentrates on the cracks, which may cause the cracks to spread and damage the glass film.
- the glass film or the laminate containing the glass film is bent along the outer periphery of the conveyance port when passing over the conveyance port, so that bending stress is applied to the glass film. It costs.
- the glass film is kept in a state in which bending stress is applied. As a result, when the glass roll is transported by a roll toe roll and when the roll is rolled, cracks tend to spread along the width direction due to the bending stress of the glass film, causing damage to the glass film. May occur.
- the number of cracks having a length of 3 or more on the end surface of the glass film is preferably 5 or less per longitudinal direction 1, more preferably 1 or less, and further preferably 0.5 or less.
- the length of the crack is the distance in the width direction from the end surface of the glass film to the tip of the crack.
- crack extension prevention measures may be taken. For example, even if a large-length crack is present at the edge of the glass film, it is possible to prevent damage to the glass film due to the crack by taking measures to prevent crack extension. Use the above prevention and/or removal of cracks together with the prevention of crack extension. ⁇ 02020/175207 10 ((171?2020/006016
- a crack extension preventing means on the surface of the glass film.
- a resin film to the surface of the glass film via an adhesive, it is possible to suppress the extension of cracks in the width direction due to bending. Even if a crack extends from the edge of the glass film in the width direction, if the resin film is adhered to the tip of the crack extension with an adhesive, the elasticity of the adhesive prevents the extension of the crack.
- the glass film of the present invention can be applied to a substrate material such as a semiconductor element, an optical device such as a display device, a lighting device, and a solar cell.
- a substrate material such as a semiconductor element
- an optical device such as a display device, a lighting device, and a solar cell.
- the glass film may be used as a substrate material for forming an element or the like, or as a cover glass for protecting the surface of the device.
- the glass film When the glass film is used as a cover glass for a device, the glass film may be used as a single layer or may be used as a laminate with another resin layer or film.
- the resin layer laminated with the glass film include adhesives and adhesives.
- the film laminated with the glass film include a polarizer and various transparent resin films.
- Fig. 1 is a cross-sectional view showing an example of a laminated structure of an optical laminate using a glass film, in which one surface of the glass film 10 is provided with a transparent resin film 20, a polarizer 30 and an adhesive layer. With 80.
- the polarizer 30 a film exhibiting absorption dichroism at any wavelength in the visible light region is used.
- the single transmittance of the polarizer 30 is preferably 40% or more, more preferably 41% or more, further preferably 42% or more, and particularly preferably 43% or more.
- the polarization degree of the polarizer 30 is preferably 99.8% or higher, more preferably 99.9% or higher, and further preferably 99.95% or higher.
- any appropriate polarizer may be adopted as the polarizer 30 depending on the purpose.
- polyvinyl alcohol film partially formalized polyvinyl alcohol film, ethylene vinyl acetate copolymer partially saponified film ⁇ 02020/175207 11 ((171?2020/006016
- a guest-host type polarizer in which a liquid crystalline composition containing a dichroic substance and a liquid crystalline compound disclosed in US Pat. It is also possible to use a Mitsumi-type polarizer or the like in which a lyotropic liquid crystal disclosed in US Pat. No. 6,049,424 is aligned in a certain direction.
- polarizers since they have a high degree of polarization, a polyvinyl alcohol-based film such as polyvinyl alcohol or partially formalized polyvinyl alcohol is provided with a dichroic substance such as iodine or a dichroic dye.
- a polyvinyl alcohol (8)-based polarizer that is adsorbed and oriented in a predetermined direction is preferably used.
- a series polarizer is obtained by dyeing and stretching an eight series film with iodine.
- the thickness of the polarizer 30 is, for example, about 1 to 80.
- the thickness of the polarizer 30 may be 3 or more or 5 or more.
- a thin polarizer having a thickness of 25 or less, preferably 15 or less, more preferably 10 or less can be used. By using a thin polarizer, a thin optical laminate can be obtained.
- the optical layered body 101 shown in FIG. 1 includes a transparent resin film 20 between the glass film 10 and the polarizer 30.
- a transparent resin film 20 between the glass film 10 and the polarizer 30 By laminating the transparent resin film 20 on the surface of the polarizer 30, the durability of the polarizer tends to be improved.
- the provision of the transparent resin film between the glass film and the polarizer tends to improve the durability against the impact from the surface of the glass film.
- the material of the transparent resin film 20 is not particularly limited. From the viewpoint of imparting durability to the polarizer and improving the impact resistance of the optical layered product, the material for the transparent resin film is thermoplastic, which has excellent transparency, mechanical strength, thermal stability and moisture barrier properties. Resin is preferably used. Specific examples of such resin materials include cellulose resins such as triacetyl cellulose, polyester resins, and polyethers. ⁇ 02020/175207 12 ((171?2020/006016
- the thickness of the transparent resin film 20 is preferably 5 to 100, more preferably 10 to 60, and further preferably 20 to 50.
- the transparent resin film 20 may be an optically isotropic film or an optically anisotropic film.
- the pressure-sensitive adhesive layer 80 is used for laminating the optical laminate 1001 with other members constituting the device.
- the optical layered body 10 1 can be bonded to an image display cell such as an organic matrix cell or a liquid crystal cell via the adhesive layer 80.
- the pressure-sensitive adhesive that constitutes the pressure-sensitive adhesive layer 80 is not particularly limited, and it is possible to use a pressure-sensitive adhesive having an acrylic polymer, a silicone polymer, a polyester, a polyurethane, a polyamide, a polyether, a fluoropolymer, a rubber polymer, etc. It can be appropriately selected and used.
- an adhesive such as an acrylic adhesive which is excellent in transparency, exhibits appropriate wettability, cohesiveness and adhesiveness, and is excellent in weather resistance and heat resistance is preferable.
- the adhesive layer 80 may be a laminate of two or more layers.
- the pressure-sensitive adhesive layer 80 has a thickness of, for example, about 1 to 300, preferably 5 to 50, and more preferably 10 to 30.
- a separator _91 is temporarily attached to the surface of the pressure-sensitive adhesive layer 80.
- the separator 91 protects the surface of the pressure-sensitive adhesive layer 80 until the optical layered body is attached to another member.
- a plastic film such as acrylic, polyolefin, cyclic polyolefin, or polyester is preferably used.
- the thickness of the separator _91 is usually about 5 to 2000, preferably 10 to 60, more preferably 15 to 40, and further preferably 20 to 30. It is preferable that the surface of the separator _ 91 be subjected to release treatment. ⁇ 0 2020/175 207 13 ⁇ (: 171? 2020 /006016
- release agent examples include silicone-based materials, fluorine-based materials, long-chain alkyl-based materials, and fatty acid amide-based materials.
- the film used as the base material for forming the pressure-sensitive adhesive layer 80 may be directly used as the separator.
- the surface of the glass film 10 has a surface protective film 9
- the surface protective film 92 protects the glass film and the like until the optical laminate is used. By temporarily attaching the surface protective film 92 to the surface of the glass film 10, it is possible to prevent the formation of scratches, holes, etc., even for a fallen object with a sharp tip.
- the same plastic material as the above-mentioned separator 91 is preferably used, and examples thereof include polyethylene terephthalate and polyethylene.
- the surface protective film 92 preferably has an adhesive layer on the attached surface of the glass film.
- a self-adhesive film obtained by laminating a resin layer constituting a film and an adhesive layer by coextrusion may be used.
- the thickness of the surface protective film 92 is, for example, about 20 to 100, preferably 30 to 500, more preferably 40 to 200, and further preferably 50 to 150. preferable.
- the optical laminate may include a transparent film (not shown) between the polarizer 30 and the pressure-sensitive adhesive layer 80.
- a transparent film between the polarizer 30 and the pressure-sensitive adhesive layer 80.
- the material, thickness, optical properties, etc. of the transparent film arranged between the polarizer 30 and the pressure-sensitive adhesive layer 80 are as follows: the transparent resin film 20 arranged between the polarizer 30 and the glass film 10 May be similar to.
- the transparent film may be an optically isotropic film or an optically anisotropic film. By using an optically anisotropic film between the polarizer 30 and the pressure-sensitive adhesive layer 80, various functions can be exhibited.
- the transparent film and the polarizer 30 form a circularly polarizing plate, so that the cell of the organic solar cell!
- the visibility of the display can be improved by blocking the reflection of external light from the metal electrodes.
- An obliquely stretched film may be used as the transparent film.
- optical anisotropic film When the optical layered body is attached to the surface of the liquid crystal cell, various optical compensations can be performed by the optical anisotropic film.
- the type of the optically anisotropic film used for optical compensation may be appropriately selected depending on the liquid crystal cell system and the like.
- the glass film, the transparent resin film, the polarizer and the like are preferably laminated between respective layers via an adhesive layer (not shown).
- the material forming the adhesive include thermosetting resins and active energy ray-curing resins. Specific examples of such resins include epoxy resins, silicone resins, acrylate resins, polyurethanes, polyamides, polyethers, polyvinyl alcohols, and the like.
- the adhesive may contain a polymerization initiator, a cross-linking agent, an ultraviolet absorber, a silane coupling agent and the like.
- the thickness of the adhesive layer is preferably 10 or less, more preferably 0.05 to 8, and even more preferably 0.1 to 7. If the thickness of the adhesive layer used for bonding between the glass film and the transparent resin film, between the glass film and the polarizer, or between the polarizer and the transparent resin film is within the above range, the glass is It is possible to obtain an optical laminate in which damage to the film is suppressed and which has excellent impact resistance.
- An adhesive may be used to bond the transparent resin films together.
- the optical layered body may have various functionalization layers other than the above.
- the function imparting layer include an antireflection layer, an antifouling layer, a light diffusion layer, an easy adhesion layer, an antistatic layer and the like.
- the glass film may be subjected to decorative printing.
- the printing thickness of decorative printing is, for example, about 5 to 100.
- An adhesive layer or a pressure-sensitive adhesive layer (not shown) is provided between the glass film and the optical film in order to fill the gap around the printing step of the decorative printing section provided on the surface of the glass film.
- the decorative printing may be performed on any surface of the glass film.
- Decorative printing may be applied to the constituent members of the optical laminate other than the glass film.
- the polarizer 30 or the transparent resin film 20 may be subjected to decorative printing.
- the glass film 10 By laminating the transparent resin film 20 and the polarizer 30 on the glass film 10, an optical laminate can be obtained.
- the glass film 10 has a long shape, it is preferable to carry out the lamination while conveying the glass film by means of a roll toe roll.
- the glass film of the present invention has a small number of coarse adhered foreign matters of 100 or more. Therefore, it is possible to prevent the glass film from cracking due to the local force applied to the foreign matter adhered portion during the transportation by the mouth toe roll or the lamination with the film.
- the order of stacking when forming the optical laminate is not particularly limited.
- the transparent resin film 20 and the polarizer 30 may be laminated in this order on the glass film 10, or a laminated body in which a plurality of films are laminated in advance and a glass film may be laminated.
- an adhesive may be used if necessary, and the adhesive may be cured after laminating.
- the method for curing the adhesive can be appropriately selected depending on the type of the adhesive.
- the adhesive is a photo-curable adhesive, it is cured by UV irradiation.
- the ultraviolet irradiation conditions can be appropriately selected according to the type of adhesive, the composition of the adhesive composition, and the like.
- the accumulated light amount is, for example, 100-200. Is 2 .
- the adhesive is a thermosetting adhesive, it is cured by heating.
- the heating conditions can be appropriately selected depending on the type of adhesive, the composition of the adhesive composition, and the like. Heating conditions, for example, the temperature is 5 0 ° ⁇ _ ⁇ 2 0 0 ° ⁇ , the heating time is 3 0 seconds to about 3 0 minutes.
- the optical laminate in which the transparent resin film 20 and the polarizer 30 are laminated on the first main surface of the glass film 10 has a glass film and therefore has high hardness. Further, in the optical layered body, since the resin film such as the transparent resin film 20 and the polarizer 30 is laminated on the first main surface of the glass film 10, the glass film 10 is prevented from being damaged and the impact resistance is high. Excellent in performance. It is considered that this is because the impact applied to the second main surface of the glass film can be effectively released to the first main surface side. ⁇ 02020/175207 16 ⁇ (: 171?2020/006016
- the polarizer 30 is provided on the first main surface of the glass film 10 via the transparent resin film 20, the impact resistance is remarkably improved. Since the glass film is less likely to be damaged, it is possible to reduce the thickness of the glass film, and the weight of the optical laminate can be reduced accordingly.
- the glass material has a high shielding property against moisture and gas, a high durability against an organic solvent, an acid, an alkali, etc., and an excellent heat resistance
- the glass film 10 should be arranged on the surface. As a result, as compared with the case where only the resin film 20 is provided, the protection performance for the polarizer 30 is improved and deterioration of the polarizer can be prevented.
- the glass material has a surface gloss, a beautiful glare feeling can be obtained by disposing the glass film on the surface of a device such as an image display device.
- a device such as an image display device.
- the glass material is optically isotropic, the reflected light is less likely to be colored, and high visibility can be realized.
- the glass film has high surface hardness and excellent impact resistance. Therefore, in an image display device in which the optical laminate is arranged such that the glass film is on the viewing side surface, the glass film has a function as a front window, and thus it is not necessary to separately provide a window layer. Therefore, the manufacturing process of the image display device can be simplified, and the device can be made thin and lightweight by reducing the number of constituent members.
- the sample of 0 was cut out, the surface was observed by an optical microscope, and the total number of adhered foreign matters of 5 or more in the observation range was counted. In addition, the number of adhering foreign matters having a size of 100 or more was counted. This operation was performed on 100 samples (total area: 1 111 2 ), and the total number of foreign matters was obtained.
- the glass film surface was washed while being conveyed in one direction at a time. After the glass film after washing was once wound in the mouth Lumpur shape, in the above Reference Example, similar as the light microscopy to determine the number of foreign substances per 2.
- the surface of the glass film was washed with a web cleaner equipped with a rotating brush and a vacuum cleaner (“Cho 11 [3 ⁇ 4mi __ 3 3” manufactured by Shinko).
- the operating conditions were as follows.
- the glass film surface was washed with a dry ice blasting device (“ ⁇ ri 1 0 1 ⁇ 3 n ⁇ ” manufactured by Air Water) equipped with multiple nozzles in the width direction (direction orthogonal to the transport direction).
- ⁇ ri 1 0 1 ⁇ 3 n ⁇ manufactured by Air Water
- the operating conditions were as follows.
- the glass film surface was washed with a two-fluid cleaning device equipped with a plurality of two-fluid nozzles (manufactured by Spraying System Japan) in the width direction.
- the operating conditions were as follows.
- Air pressure 0 2 ⁇ 9 ⁇
- Laminate pressure of adhesive mouthpiece (“Betalon” manufactured by Meiwa Gomu Kogyo). The glass film surface was washed by pressing it against the glass film surface with.
- the surface of the glass film was sprayed with a 5% by weight aqueous solution of sodium hydroxide, and after 5 minutes, washing and drying were performed.
- the glass film was unwound 100 times from the mouth-shaped roll of glass film, and the one that did not break due to blocking was broken by blocking before it was rolled out.
- the thing is X.
- Table 1 shows the number of foreign substances in the glass films of Reference Examples, Examples 1 to 3 and Comparative Examples 1 to 3, and the results of the yield and blocking tests.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/431,489 US20220135471A1 (en) | 2019-02-28 | 2020-02-17 | Glass film |
KR1020217027984A KR20210129082A (ko) | 2019-02-28 | 2020-02-17 | 유리 필름 |
JP2021501976A JPWO2020175207A1 (ja) | 2019-02-28 | 2020-02-17 | |
CN202080017467.0A CN113508099A (zh) | 2019-02-28 | 2020-02-17 | 玻璃膜 |
EP20762702.7A EP3922616A4 (en) | 2019-02-28 | 2020-02-17 | GLASS FILM |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019036550 | 2019-02-28 | ||
JP2019-036550 | 2019-02-28 |
Publications (1)
Publication Number | Publication Date |
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WO2020175207A1 true WO2020175207A1 (ja) | 2020-09-03 |
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EP (1) | EP3922616A4 (ja) |
JP (1) | JPWO2020175207A1 (ja) |
KR (1) | KR20210129082A (ja) |
CN (1) | CN113508099A (ja) |
TW (1) | TW202045453A (ja) |
WO (1) | WO2020175207A1 (ja) |
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- 2020-02-17 US US17/431,489 patent/US20220135471A1/en active Pending
- 2020-02-17 KR KR1020217027984A patent/KR20210129082A/ko unknown
- 2020-02-17 WO PCT/JP2020/006016 patent/WO2020175207A1/ja unknown
- 2020-02-17 CN CN202080017467.0A patent/CN113508099A/zh active Pending
- 2020-02-17 EP EP20762702.7A patent/EP3922616A4/en active Pending
- 2020-02-17 JP JP2021501976A patent/JPWO2020175207A1/ja active Pending
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EP3922616A1 (en) | 2021-12-15 |
KR20210129082A (ko) | 2021-10-27 |
US20220135471A1 (en) | 2022-05-05 |
EP3922616A4 (en) | 2022-11-30 |
JPWO2020175207A1 (ja) | 2020-09-03 |
CN113508099A (zh) | 2021-10-15 |
TW202045453A (zh) | 2020-12-16 |
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