WO2010038757A1 - ガラスロール、ガラスロールの製造装置、及びガラスロールの製造方法 - Google Patents
ガラスロール、ガラスロールの製造装置、及びガラスロールの製造方法 Download PDFInfo
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- WO2010038757A1 WO2010038757A1 PCT/JP2009/066998 JP2009066998W WO2010038757A1 WO 2010038757 A1 WO2010038757 A1 WO 2010038757A1 JP 2009066998 W JP2009066998 W JP 2009066998W WO 2010038757 A1 WO2010038757 A1 WO 2010038757A1
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- WO
- WIPO (PCT)
- Prior art keywords
- glass
- glass film
- film
- protective sheet
- roll
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/033—Re-forming glass sheets by bending by press-bending between shaping moulds in a continuous way, e.g. roll forming, or press-roll bending
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D57/00—Internal frames or supports for flexible articles, e.g. stiffeners; Separators for articles packaged in stacks or groups, e.g. for preventing adhesion of sticky articles
- B65D57/002—Separators for articles packaged in stacks or groups, e.g. stacked or nested
- B65D57/003—Separators for articles packaged in stacks or groups, e.g. stacked or nested for horizontally placed articles, i.e. for stacked or nested articles
- B65D57/004—Separators for articles packaged in stacks or groups, e.g. stacked or nested for horizontally placed articles, i.e. for stacked or nested articles the articles being substantially flat panels, e.g. wooden planks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/67—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material
- B65D85/671—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form
- B65D85/672—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/0222—Scoring using a focussed radiation beam, e.g. laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/412—Roll
- B65H2301/4127—Roll with interleaf layer, e.g. liner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/61—Display device manufacture, e.g. liquid crystal displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y10T428/24364—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] with transparent or protective coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24488—Differential nonuniformity at margin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24752—Laterally noncoextensive components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
Definitions
- the present invention relates to a technique for improving a packaging form of a glass film used for a glass substrate used for a flat panel display or a solar cell, a cover glass used for organic EL lighting or the like.
- flat panel displays such as a liquid crystal display, a plasma display, an organic EL display and a field emission display have become popular in recent years.
- These flat panel displays are required to be thinner.
- organic EL displays are required to be easily carried by folding or winding, and to be usable not only on flat surfaces but also on curved surfaces.
- it is not limited to displays that are required to be used not only on flat surfaces but also on curved surfaces.
- objects having curved surfaces such as the surfaces of automobile bodies, roofs of buildings, pillars, and outer walls It is desired to form a solar cell or an organic EL illumination on the surface. Therefore, various glass plates including flat panel displays are required to be further thinned to satisfy high flexibility that can be applied to curved surfaces.
- Thin glass having a film shape of 200 ⁇ m or less has been developed.
- the packaging form used for transportation or the like becomes a big problem.
- a packaging form of the glass plate a packaging form in which a predetermined angle is provided on the pallet having the back surface and the glass plate and the protective sheet are alternately stood and packaged (see, for example, Patent Document 2).
- a packaging form in which glass plates and protective sheets are alternately stacked horizontally on a pallet and packaged is known (for example, see Patent Document 3), but when such a packaging form is adopted for a glass film The following problems occur.
- the entire load of the glass film is supported only at the contact point with the support member, there is a possibility that stress concentrates on the support portion and breakage occurs. Further, since the glass film bends downward due to its own weight, the upper glass film may come into direct contact with the lower glass film and may be damaged.
- Patent Document 5 discloses a new packing form in which a composite film in which the entire surface of one side of a glass film is covered with a polymer layer is rolled up together with an intermediate layer. Such a packing form pays attention to the flexibility of a glass film, and is considered effective as a packing form of a glass film.
- the composite film disclosed in Patent Document 5 has a polymer layer formed on the entire surface of one side of the glass film, and this purpose is to prevent breakage of the glass film. And this polymer layer is formed just before winding up a composite film. Specifically, after forming the glass film, while transporting the glass film in a horizontal posture, the polymer is applied to the upper surface side of the glass film, and the polymer is irradiated with ultraviolet rays and cured in the downstream process, and then dried. A polymer layer is formed by drying in a line.
- the polymer layer is not completely solidified at the stage of winding. May stick to the intermediate layer.
- the sticking occurs in this way, when unpacking the composite film wound up in a roll shape, the intermediate layer and the polymer layer cannot be easily separated or the glass film is There is a risk of damage.
- Patent Document 5 also has the above-described problems and still has room for improvement.
- the present invention can prevent the breakage of the glass film while ensuring the cleanliness of the glass film, and reduce the number of processing steps for the glass film before and after unpacking as much as possible. It is a technical problem to provide a simple packaging form.
- the present invention created to solve the above-described problems provides a glass roll in which a glass film formed by a downdraw method and having exposed front and back surfaces is wound on a protective sheet and rolled up.
- the glass film formed by the down draw method with the front and back surfaces exposed is wound as it is together with the protective sheet into a roll to form a glass roll. Therefore, it is not necessary to perform a film forming process for forming a protective film such as a polymer layer on both the front and back surfaces of the glass film in the process before packing, and the polymer layer and the like from the surface of the glass film in the process after unpacking. It is not necessary to perform a removal process for removing the protective film.
- the pre-packing process can be shortened by an amount that does not require the process of forming the protective film, so the percentage of foreign matter adhering to the front and back surfaces of the glass film can be reduced as much as possible, and the protective film is derived after unpacking.
- the situation that the foreign material to remain cannot also arise.
- the cleanliness of the front and back surfaces of the glass film derived from the downdraw method can be favorably maintained.
- the advantage is that cleanliness can be ensured in the state of the unpolished surface without performing subsequent surface polishing of the glass film as in the case of molding by the float method. There is also.
- the exposed front and back surfaces of the glass film are protected by a protective sheet in a glass roll state.
- the front and back of a glass film are the glass surfaces in which protective films, such as a polymer layer, are not formed, the situation where a glass film and a protective sheet adhere firmly at the stage which wound up. Therefore, the damage of the glass film in the state of the glass roll can be surely reduced, and the separability between the glass film and the protective sheet can be maintained well, so the damage of the glass film during unpacking is reduced as much as possible. can do.
- the glass film does not warp and can be easily fed to the next process. Furthermore, since it can be made into a long glass film by winding it, it can be cut with a free length after that, and it becomes possible to deal with substrates of various sizes, and waste of the glass film is achieved. Can be prevented.
- the thickness of the glass film is preferably 1 ⁇ m or more and 200 ⁇ m or less.
- the arithmetic average roughness Ra of both end surfaces in the width direction of the glass film is 0.1 ⁇ m or less.
- “arithmetic mean roughness Ra” is a value measured in accordance with JIS B0601: 2001.
- both end surfaces in the width direction of the glass film are configured by cut surfaces cut by laser cutting.
- the laser cutting here includes not only laser cutting but also laser cutting.
- the protective sheet may protrude from both sides of the glass film in the width direction.
- the outermost layer is preferably the protective sheet.
- the glass film is not exposed at the outermost layer in the state of the glass roll, it is preferable from the viewpoint of preventing the glass film from being damaged. That is, even if another member such as another glass roll comes into contact with the outermost layer of the glass roll, the outermost layer of the glass roll is covered with the protective sheet, so that the glass film is directly damaged or broken. It becomes difficult to occur. Moreover, since the outermost layer is protected by the protective sheet, it is advantageous for ensuring the cleanliness of the glass film.
- the innermost layer is preferably the protective sheet.
- the glass film is not exposed at the innermost layer in the state of the glass roll, which is preferable from the viewpoint of preventing the glass film from being damaged.
- the glass film and the winding core are not in direct contact.
- a protective sheet is interposed between the glass film and the core. Therefore, damage such as scratches hardly occurs on the surface of the glass film due to rubbing with the winding core.
- the protective sheet may be a resin sheet.
- the cushioning property of the protective sheet is improved, which is advantageous in reducing breakage of the glass film.
- the protective sheet is a foamed resin sheet
- the cushioning property becomes better, which is more preferable from the viewpoint of reducing breakage of the glass film.
- the present invention provides a glass roll manufacturing apparatus comprising: a molding unit that forms a glass film by a downdraw method; and a winding roller that winds the glass film over a protective sheet. And the said winding roller provides the structure which winds up with the said protection sheet in the state which exposed the said glass film on the front and back.
- a cutting unit that laser-cuts ears formed at both ends in the width direction of the glass film on a conveyance path from the forming unit to the winding roller is provided.
- the winding roller is disposed at a position shifted laterally from a position directly below the molding portion, and the glass film that has exited the molding portion is curved to form the side winding roller. It may be supplied.
- an angle formed by a tangent along the glass film from the molding part and a tangent along the glass film at a contact point between the winding roller and the glass film is 90 degrees or more, and the molding part It is preferable that the glass film which came out from is curving so that it may continue smoothly to the two said tangents.
- the glass film can be curved without applying excessive stress to the glass film. Therefore, it becomes difficult to cause breakage from the curved portion of the glass film during the winding operation of the glass film, and the stable winding operation can be continued.
- the present invention which was created to solve the above-mentioned problems, forms a glass film by a downdraw method, and rolls it on a protective sheet in a state where the front and back surfaces of the formed glass film are exposed by a winding roller.
- a method for producing a glass roll that is wound into a shape to form a glass roll is provided.
- the ears formed at both ends in the width direction of the glass film are laser-cut at a stage until the glass film is wound up by the winding roller.
- the glass film and the protective sheet are wound up, and the protective sheet is wound from the winding direction end of the glass film. You may make it wind up only and wind the said protection sheet around the outer peripheral surface of the said glass film.
- the outermost layer of a glass roll can be comprised with a protection sheet.
- the glass film and the protective sheet may be wound up in a state where the glass film is disposed on the winding roller side of the protective sheet.
- examples of the downdraw method include a slot downdraw method, an overflow downdraw method, and a redraw method.
- the surface smoothness can be obtained without any additional processing after molding.
- an excellent glass film can be formed. Therefore, it is preferable to use the overflow downdraw method or the redraw method as the downdraw method.
- the glass film packaging form it is possible to simultaneously ensure the cleanliness of the glass film and prevent damage, and to allow the number of processing steps for the glass film before and after unpacking.
- a glass roll that can be reduced as much as possible can be provided.
- FIG. 1 is a perspective view of a glass roll according to the present invention.
- FIG. 2 is an explanatory diagram of a glass film manufacturing apparatus.
- FIG. 3 is a view of a form in which a holding portion is provided on the core, where (a) is a view of a form for holding a glass film and a protective sheet, and (b) is a view for holding only the glass film.
- FIG. 4 is a diagram of a form in which the outer cylinder of the winding core expands and contracts.
- FIG. 5 is an explanatory view of a glass roll manufacturing apparatus according to the present invention.
- FIG. 6 is an explanatory view showing a method of cleaving a glass film by thermal stress at that time by applying laser irradiation heat to the glass film.
- FIG. 7 is a view showing a preferred method for cutting a glass film according to the present invention, in which (a) shows a state in which a scribe line has passed through a roller before cutting, and (b) shows a state in which folding is performed. (C) is a figure of the state which the rear-end part of the cutting
- the glass roll (1) according to the present invention is obtained by winding a glass film (2), which is formed by a downdraw method, on which the front and back surfaces are exposed, on a protective sheet (3) in a roll shape. Is. That is, the front and back surfaces of the glass film (2) are in direct contact with the protective sheet (3). In addition, it is preferable that the front and back surfaces of the glass film (2) are unpolished surfaces.
- the silicate glass is used for the glass film (2), preferably silica glass or borosilicate glass is used, and most preferably non-alkali glass is used.
- the glass film (2) contains an alkali component, cation substitution occurs on the surface, so-called soda blowing phenomenon occurs, and the structure becomes rough. In this case, when the glass film (2) is curved and used, it may be easily damaged from a portion roughened due to deterioration over time.
- the alkali-free glass is a glass that does not substantially contain an alkali metal oxide, and specifically, a glass having an alkali metal oxide of 1000 ppm or less.
- the content of the alkali component in the present invention is preferably 500 ppm or less for alkali metal oxides, and more preferably 300 ppm or less for alkali metal oxides.
- the glass film (2) can be wound up, it is particularly suitable for long objects. That is, the length (long side) with respect to the width (short side) of the glass film (2) is preferably 3 times or more, more preferably 5 times or more, and even more preferably 10 times or more. Thus, even if it is a long object, it can be packed compactly and is suitable for transportation.
- the width of the glass film (2) is 12.5 mm or more and is appropriately selected depending on the size of the substrate of the device used, such as a small display for a mobile phone to a large screen display, but is 100 mm or more. Preferably, it is 300 mm or more, more preferably 500 mm or more.
- the thickness of the glass film (2) is more preferably 1 ⁇ m to 200 ⁇ m, and most preferably 10 ⁇ m to 100 ⁇ m.
- appropriate flexibility can be provided to a glass film (2), and when a glass film (2) is wound up, it starts to a glass film (2). This is because unreasonable stress can be reduced and the glass film (2) can be prevented from being damaged.
- the thickness is less than 1 ⁇ m, the strength of the glass film (2) is insufficient, and if it exceeds 200 ⁇ m, the glass film (2) is likely to be damaged by a tensile stress when wound to a small diameter. Absent.
- the arithmetic average roughness Ra of both end surfaces in the width direction of the glass film (2) is preferably 0.1 ⁇ m or less, and more preferably 0.05 ⁇ m or less. This is because appropriate smoothness can be imparted to both end surfaces in the width direction of the glass film (2). Therefore, in this case, when the glass film (2) is wound into a roll shape, it is difficult for fine scratches to occur on both end faces of the glass film (2), and the glass film (2) can be wound without any trouble. It becomes possible. Moreover, since the glass powder generate
- the glass film (2) When a scribe line is formed along the length direction on the surface of the glass film (2) using a diamond cutter or the like, the glass film (2) is formed with a scribe line. It is preferable to wind so that the surface on the other side becomes the inner peripheral side. Since the scratch of the formed scribe line has fine scratches, when the glass film (2) is wound so that the surface on which the scribe is formed becomes the outer peripheral side, the scribe line is caused by the tensile stress. This is because there is a possibility that the glass film (2) may be damaged with the fine scratches generated in the grooves of the origin as the origin.
- the method basically does not cause fine scratches on the cut surface.
- the winding direction of the glass film (2) is not limited.
- the end face of the glass film (2) can also be treated by performing fire polishing and chemical polishing after folding after forming the scribe line.
- a glass roll (1) is produced by stacking and winding a resin film in a region of 1 to 2 cm from both end faces of the glass film (2). Furthermore, if an adhesive resin film is used, even if a crack occurs on the end face of the glass film (2), it is possible to prevent the crack from progressing.
- the glass film (2) When the glass film (2) is pulled out from the glass roll (1) and the glass film (2) is supplied to various processes of the processing process, the glass film (2) is directly gripped and supplied to the process. ) May come into contact with device members and break. Accordingly, it is preferable to attach the resin film at the start (starting end) and the end (ending) of winding of the glass film (2). Since the resin film is less likely to be damaged than the glass film (2), the resin film can be gripped when being supplied to the process, and the supply to the process can be facilitated. . The resin film is attached after being overlapped by 1 to 2 cm on the start and end portions of the glass film (2), and then wound to obtain a glass roll (1).
- the length of the resin film is not particularly limited, and for example, the length of the glass roll (1) may be set to one circumference. Moreover, it is preferable that a resin film has adhesiveness, and it is preferable that an elasticity modulus is smaller than a glass film (2).
- the glass film (2) is manufactured using the manufacturing apparatus shown in FIG.
- the glass ribbon (G) immediately after flowing down from the lower end (41) of the wedge-shaped molded body (4) is stretched downward while the shrinkage in the width direction is regulated by the cooling roller (5) to a predetermined thickness. Until it gets thinner.
- the glass ribbon (G) having reached the predetermined thickness is gradually cooled in a slow cooling furnace (annealer) to remove the thermal strain of the glass ribbon (G), and the glass film (2) is formed.
- the glass film (2) is preferably formed by the overflow down draw method as shown in FIGS.
- the overflow down draw method is a molding method in which both sides of the glass plate do not come into contact with the molded member during molding, and both surfaces (translucent surface) of the obtained glass plate are hard to be scratched and have a high surface without being polished. This is because quality can be obtained.
- the thickness of the protective sheet (3) is preferably 10 ⁇ m to 2000 ⁇ m. If it is less than 10 ⁇ m, the cushioning performance of the protective sheet is not sufficient, and if it exceeds 2000 ⁇ m, the roll outer diameter of the glass roll formed after winding the glass film (2) becomes unreasonably large. Is also not preferred.
- the protective sheet (3) should not be denatured such as softening around 100 ° C. Is preferred.
- the protective sheet (3) is preferably slightly larger than the glass film (2) in the width direction. That is, it is preferable that the protective sheet (3) protrudes from both sides in the width direction of the glass film (2) in the state of the glass roll (1). If it does in this way, since the width direction both end surfaces of a glass film (2) are protected by a protection sheet (3), the fine damage
- protective sheet (3) ionomer film, polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polypropylene film, polyester film, polycarbonate film, polystyrene film, polyacrylonitrile film, ethylene vinyl acetate
- copolymer film ethylene-vinyl alcohol copolymer film, ethylene-methacrylic acid copolymer film, polyamide resin film (nylon film), polyimide resin film, resin cushioning material such as cellophane, interleaf, nonwoven fabric, etc.
- a polyethylene foam resin sheet as the protective sheet (3) because it can absorb impact and has high strength against tensile stress.
- the glass film (2) is wound so that the protective sheet (3) is on the outer peripheral side, the glass film (2) is wound so that the protective sheet (3) is on the inner peripheral side, and the glass roll (1) May be formed.
- the glass film (2) is wound so that the protective sheet (3) is on the inner peripheral side, the glass film (2) is fixed to the protective sheet (3) with a tape or the like or as shown in FIG. Winding is started after the glass film (2) and the protective sheet (3) are held in the holding groove (68) provided in the winding core (6) or only the glass film (2) is held.
- the protective sheet (3) is preferably provided with conductivity. If it does in this way, when taking out a glass film (2) from a glass roll (1), since it becomes difficult to produce peeling electrification between a glass film (2) and a protection sheet (3), glass film (2) and This is because the protective sheet (3) can be easily peeled off.
- conductivity can be imparted by adding a component that imparts conductivity, such as polyethylene glycol, to the protective sheet (3).
- Is interleaving paper conductivity can be imparted by engraving conductive fibers.
- Conductivity can also be imparted by forming a conductive film such as ITO on the surface of the protective sheet (3).
- the glass roll (1) according to the present invention is preferably wound around a core (6). If it does in this way, since it can fix to a core (6) when winding up a glass film (2), a glass film (2) can be wound up more firmly. Further, even if pressure is applied from the outside to the glass roll (1) of the wound glass film (2), the glass film (2) is not bent inward due to the presence of the winding core (6). It is possible to prevent undue tensile stress from being applied to the film (2), and it is possible to more reliably prevent the glass film (2) from being damaged.
- the length of the core (6) is preferably longer than the width of the glass film (2). If it does in this way, a core (6) can be made to project rather than a side edge part of a glass roll (1), and a fine crack and a chip in a side edge part of a glass film (2) by hitting etc. are prevented. Because it can be done.
- the material of the core (6) includes metals such as aluminum alloy, stainless steel, manganese steel, and carbon steel, phenol resin, urea resin, melamine resin, unsaturated polyester resin, epoxy resin, polyurethane, direal terephthalate resin, etc.
- Thermosetting resin, polyethylene, polypropylene, polystyrene, AS resin, ABS resin, methacrylic resin, vinyl chloride, or other thermoplastic resins, or glass fiber or carbon fiber reinforced fibers such as these thermosetting resins or thermoplastic resins Mixed reinforced plastics, paper tubes, etc. can be used.
- aluminum alloys and reinforced plastics are excellent in terms of strength, and paper can be reduced in weight, so that it can be preferably used.
- the protective sheet (3) is wound around the core (6) in advance for one turn or more.
- the winding core (6) is preferably provided with a holding groove (68) for holding the end of the glass film (2).
- the end of the glass film (2) is inserted into the holding groove (68) at the same time with the protective sheet (3) folded and covered, and then the glass film (2).
- the holding groove (68) is formed of the cushioning material (69)
- only the glass film (2) is inserted and the winding is started. May be.
- the glass roll (1) according to the present invention is more preferably removed from the core (6) after being wound by the core (6). That is, when the glass film (2) is wound, the glass roll (1) is temporarily fixed to the core (6) and wound more firmly, and then the glass roll (6) is removed to remove the glass roll (1). This is because the weight of 1) can be reduced and the glass roll (1) can be made more suitable for transportation.
- the core (6) is composed of a concentric double circular sleeve of an inner cylinder (65) and an outer cylinder (66). It is preferable to use one in which an elastic member (67) is interposed between the cylinders (66). By pressing the outer cylinder (66) in the center direction, the elastic member (67) contracts, so that the outer cylinder (66) is reduced in diameter, so that the core (6) can be easily removed from the glass roll (1). This is because it can be removed.
- the elastic member (67) is used as a member for expanding and contracting the outer cylinder (66). However, the space between the inner cylinder (65) and the outer cylinder (66) is sealed, and the fluid in the inner space is sealed. It is also possible to adopt a configuration in which the outer cylinder (66) is expanded and contracted by changing the pressure.
- the tensile stress generated on the surface of the glass film (2) when the glass film (2) is wound up and used as the glass roll (1) is determined by the following equation (1).
- Equation 1 ⁇ represents the tensile stress value on the outer surface of the glass film, R represents the radius of the inner diameter of the glass roll (radius of the outer diameter of the core), T represents the thickness of the glass film, and E represents the glass The Young's modulus of the film is shown.
- the radius R of the inner diameter of the glass roll (1) (the radius of the core 6) is determined by the following equation (2).
- Equation 2 ⁇ represents the tensile stress value on the outer surface of the glass film, R represents the radius of the inner diameter of the glass roll (radius of the outer diameter of the core), T represents the thickness of the glass film, and E represents the glass The Young's modulus of the film is shown.
- the winding radius when winding the glass film (2) can be selected more appropriately. Since it is possible to prevent undue tensile stress from being applied to the outer surface of the glass film (2) when the winding radius is too small, it is possible to more reliably prevent the glass film (2) from being damaged. it can.
- the radius of the outer diameter of a core (6) is just to set the radius of the outer diameter of a core (6) more than the value calculated
- the glass roll (1) according to the present invention is manufactured using a manufacturing apparatus shown in FIG.
- a glass film (2) formed by the overflow down draw method (for example, OA-10G manufactured by Nippon Electric Glass Co., Ltd .: thickness 50 ⁇ m, width 150 mm) is used to remove the roller contact portion in contact with the cooling roller (5).
- edge part (part which becomes comparatively thick) corresponding to the roller contact part in the width direction both ends of a glass ribbon (G) is removed by the cutting
- this cutting means (7) for example, one utilizing laser cutting is used.
- a glass film (2) that is laser-cut can be used, but in this case, the cut surface is melted by the irradiation heat of the laser and becomes thick, which may cause trouble when winding. is there. Therefore, as laser cutting, it is preferable to use one that is cleaved by thermal stress generated by laser irradiation heat (hereinafter referred to as laser cleaving).
- laser cleaving it is preferable to use one that is cleaved by thermal stress generated by laser irradiation heat (hereinafter referred to as laser cleaving).
- laser cleaving the glass film (2) is cut using the thermal stress generated by the laser irradiation heat, so it is necessary to heat the glass film (2) to a high temperature as in the case of fusing. There is no.
- the cut surface is melted and thickened, or that the glass film (2) is unduly distorted by heat during cutting. That is, the glass film (2) can be wound up more easily, and breakage of the end can be prevented more reliably.
- the cut surface (fracted cross section) by laser cleaving becomes a smooth high-strength cross section, the arithmetic average roughness Ra of the both end surfaces in the width direction of the glass film (2) is not subjected to post-processing such as polishing. As described above, it becomes 0.1 ⁇ m or less.
- the laser cleaving used in this embodiment forms an initial crack (W) at the downstream end of the glass film (2), and the heating point (X) by laser irradiation is the glass film.
- the heated portion is cooled while scanning the cooling point (Y) by the refrigerant, and the initial crack (W) is developed by the thermal stress generated at that time, thereby breaking the line. (Z) is formed.
- this breaking line (Z) is continuously formed over the back surface from the surface of a glass film (2). Accordingly, when the initial crack (W) is advanced to form the breaking line (Z), the ear corresponding to the part where the breaking line (Z) is formed is cut.
- the scanning of the laser heating point (X) and the cooling point (Y) by the coolant is performed in the direction in which the glass film (2) is transported with the laser heating point (X) and the cooling point (Y) by the coolant fixed. This is performed by sequentially transporting to the downstream side (left direction in the example shown in FIG. 5).
- the molding unit includes a molding zone (A), a slow cooling zone (annealer) (B), and a cooling zone (C).
- the glass film (2) is curved so as to be inscribed in the tangent lines L1 and L2.
- the protective sheet (3) is pulled out from the protective sheet roll (31) existing below the core (6), the protective sheet (3) is stacked on the outer peripheral side of the glass film (2), and the core (6)
- the glass film (2) and the protective sheet (3) are wound up in a roll shape so as to be along the surface.
- the glass film (2) is scribed and folded in the width direction by using a width direction cutting cutter (not shown). And only the glass film (2) is cut.
- the outermost layer of the glass roll (1) is composed of the protective sheet (3).
- the protective sheet (3) is previously wound around the core (6). It is preferable that the innermost layer of the glass roll (1) is also composed of the protective sheet (3).
- the protective sheet (3) when the protective sheet (3) is stacked on the outer peripheral side of the glass film (2) and the glass film (2) and the protective sheet (3) are wound up, the outer diameter of the roll is reached. At this stage, the glass film (2) and the protective sheet (3) may be cut simultaneously. In other words, since the protective sheet (3) is always wound up so as to be positioned on the outer peripheral side of the glass film (2), the outermost roll of the glass roll (1) can be obtained without winding only the protective sheet (3).
- An outer layer can be comprised with a protection sheet (3).
- the glass film (2) and the protective sheet (3) may be wound in a roll shape in a state where the protective sheet (3) is stacked on the inner peripheral side of the glass film (2).
- the predetermined roll outer diameter when the predetermined roll outer diameter is reached, only the glass film (2) is cut in the width direction and wound up to the end, and then the protective sheet (3) is further wound up one or more times, and then the protective sheet It is preferable to cut (3).
- the glass film (2) is rich in flexibility due to its thinness, it is difficult to fold in the width direction by a normal method, and it is possible to fold in the width direction by the method shown in FIG. preferable.
- the scribe line (75) is formed in the width direction by the width direction cutting cutter (74)
- the glass film (2) is conveyed as it is, and the pre-cut roller (71) is scribed as shown in FIG. 7 (a).
- Line (75) passes.
- the rotational speed of the post-cutting roller (73) and the winding speed of the glass roll (1) are made lower than the rotational speed of the pre-cutting roller (71), and the cutting roller (72).
- the scribe line (75) of the glass film (2) that has been bent is lifted upward and bent by the driving means (not shown) from the transport line, and is bent by the stress concentration generated at that time. I do. Thereafter, the cutting roller (72) is lowered, and as shown in FIG. 7 (c), after the cut end passes through the post-cutting roller (73), the winding speed of the glass roll (1) is increased and the winding is performed. At the same time, the glass roll (1) and the core (6) are exchanged, and then the treatment is continuously performed. In addition, you may make it utilize the above-mentioned laser cleaving also for the cutting
- the laser cutting means is used as the cutting means (7).
- the glass is more glassy than the case where the scribe line is formed by the diamond cutter to perform the breaking.
- the generation of powder can be greatly reduced.
- resistance due to tensile stress can be improved.
- the value of the inner diameter (S) (core diameter) of the glass roll (1) is obtained based on the ⁇ value of 30 to 60 MPa in the above formula 2, but laser cleaving is used.
- the glass roll (1) can be produced without any problem.
- the value of the inner diameter (S) (the diameter of the core) of the glass roll (1) is set with ⁇ of 220 MPa, the glass roll (1) can be produced without any problem.
- the value of ⁇ described above is , Up to 30 MPa is safe.
- the specific Young's modulus of the glass film (2) is preferably 29 or more and 40 or less, and more preferably 29 or more and 35 or less.
- the specific Young's modulus is obtained by dividing the Young's modulus by the specific gravity and is a measure of the amount of deflection under its own weight.
- the glass film (2) is subjected to a roll-to-roll continuous process, and is cut into a predetermined size for use at the final stage. Since the plate glass cut at this time is thin and highly flexible, if the specific Young's modulus is less than 29, it will bend more than necessary in the process after cutting, which may induce trouble in the process, It is required to have a predetermined specific Young's modulus. On the other hand, when the specific Young's modulus of the glass film exceeds 40, the glass film (2) becomes difficult to bend, so that it is difficult to form the glass roll (1).
- the protective sheet roll (31) is arrange
- the protective sheet roll (31) is demonstrated. May be arranged above the glass film (2), and the protective sheet (3) may be pulled out downward.
- the form which winds up the glass film (2) currently conveyed in the substantially horizontal direction is demonstrated, the form which winds up the glass film (2) currently conveyed in the perpendicular direction But you can.
- the glass film (2) is formed by the overflow downdraw method has been described above, it may be formed by a slot downdraw method or a redraw method.
- FIG. 8 is a perspective view in which an exterior body is provided on a glass roll according to the present invention.
- FIG. 9 is a perspective view in which a support rod is provided on the core of the glass roll according to the present invention.
- FIG. 10 is a perspective view in which a flange is provided on the core of the glass roll according to the present invention.
- FIG. 11 is an explanatory view showing a method of placing the glass roll according to the present invention in the vertical direction.
- a clean state can be maintained by providing a cylindrical exterior body (8) and replacing the internal gas with a clean one. Further, a lid on a flat plate can be caulked and fastened to a cylindrical body in a clean room, and sealed in a canned shape. Furthermore, a clean state can also be maintained by packaging the glass roll (1) with a shrink film in a clean room.
- the shaft (61) is provided on the core (6) as shown in FIG. 62) is preferably arranged on a pedestal (63). Furthermore, after arrange
- unit may be sufficient, and the form which packs a several glass roll (1) simultaneously in one packaging box may be sufficient.
- the pedestal (63) in the packing box and suspending the shaft (61) of the glass roll (1) with a crane or the like, it can be put in and out of the packing box. Since the base (63) is firmly fixed in the packaging box, it is excellent in safety.
- flanges (64) at both ends of the core (6) so that the glass film (2) does not directly contact the mounting surface. This is to prevent the glass film (2) wound on the glass roll (1) from directly contacting the placement surface.
- the shape of the flange of FIG. 10 is circular, when it is made polygonal, it can prevent that a glass roll (1) rolls, when it mounts on a floor surface.
- the flange (64) may be detachable from the core (6). In this case, only the core (6) is used during winding and rewinding, and a flange (64) is attached to protect the glass film (2) during transportation and storage.
- the width of the protective sheet (3) is wider than the width of the glass film (2). If the width of the protective sheet (3) is wide, even if the glass film (2) is displaced on the core (6), the end face does not directly contact the flange (64), and the glass film (2) is damaged. This is because it is possible to prevent this.
- the inner surface of the flange (64) is also preferably protected by a member having a buffering action.
- the glass roll (1) when the glass roll (1) according to the present invention is placed in the lateral direction, it is damaged by its own weight. Therefore, in order to prevent the glass film (2) wound on the glass roll (1) from directly contacting the placement surface, the glass roll (1) is used by using the packing device (9) shown in FIG. It is preferable to place it vertically.
- the packing device (9) includes a base part (91) and a columnar part (92) standing on the base part (91). As shown in FIG. 11, the glass roll (1) is placed in the vertical direction on the base part (91) so that the columnar part (92) is inserted into the core (6) of the glass roll (1).
- the columnar part (92) is preferably detachable from the base part (91). By making it detachable, the glass roll (1) can be easily loaded and unloaded. When the glass roll (1) is placed, the columnar portions (92) are erected at intervals such that the glass rolls (1) do not collide with each other. In order to prevent vibration during transportation, a buffer material may be filled between the glass rolls (1).
- the base part (92) is preferably provided with a hole for a forklift. Further, by providing a box (not shown), it becomes possible to package more strictly.
- FIG. 12 is a diagram showing a glass roll processing method according to the present invention.
- FIG. 13 is a view showing another processing method of the glass roll according to the present invention.
- FIG. 14 is a diagram of a protective sheet having an embossed surface.
- the glass roll (1) according to the present invention is a roll.
- Continuous processing can be performed in a two-roll system.
- the cleaning step (110), the drying step (111), and the charge removal step (112) can be continuously performed by a roll-to-roll method by the method shown in FIG. Since the glass film (2) has flexibility, it can be immersed in a cleaning tank in the cleaning step (110).
- the roll-to-roll type continuous treatment is performed on the glass roll (1) according to the present invention, it is preferable that the glass roll (1) is erected as shown in FIG.
- the roll-to-roll method can be performed in a state where the sheet is erected. When it is carried out in an upright state, it is possible to drain water well after completion of the cleaning process, and since the transport roller (113) and the surface of the glass film (2) are not in contact with each other, it is possible to more reliably prevent the occurrence of scratches.
- the processing method of FIG. 13 when the glass film (2) flutters, you may make it support the upper part of a glass film (2) by providing the conveyance roller which is not illustrated suitably.
- the glass roll (1) that is insufficiently dried after washing is used in a process that hates moisture extremely, it is necessary to remove the moisture adsorbed on the glass surface before use. Before putting (1), it is necessary to dry sufficiently in a roll state.
- a protective sheet (3) having irregularities formed on the surface by embossing or the like This is because the entire surface of the protective sheet (3) does not come into contact with the glass film (2), so that it has excellent air permeability and can be further dried.
- the core (6) has a structure excellent in air permeability by providing holes, slits, and meshes.
- the heater is disposed in the hollow portion of the core (6) and dried by heating from the inside of the core (6). After drying, for example, the glass roll (1) is sealed in, for example, an exterior body shown in FIG. Moreover, it is also possible to provide a sheet-like desiccant (such as a silica gel-containing sheet) on the end face of the glass roll (1) and cover it with a moisture-proof film (such as a metal film deposited film).
- a sheet-like desiccant such as a silica gel-containing sheet
- the present invention can be suitably used for glass substrates used in flat panel displays such as liquid crystal displays and organic EL displays, devices such as solar cells, and cover glasses for organic EL lighting.
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Abstract
Description
2 ガラスフィルム
3 保護シート
4 成形体
6 巻芯
Claims (18)
- ダウンドロー法によって成形された表裏面が露出したガラスフィルムを、保護シートに重ねてロール状に巻き取ったガラスロール。
- 前記ガラスフィルムの厚みが、1μm以上200μm以下である請求項1に記載のガラスロール。
- 前記ガラスフィルムの幅方向の両端面の算術平均粗さRaが、0.1μm以下である請求項1又は2に記載のガラスロール。
- 前記ガラスフィルムの幅方向の両端面が、レーザー切断により切断された切断面で構成されている請求項1~3のいずれか1項に記載のガラスロール。
- 前記保護シートが、前記ガラスフィルムの幅方向両側から食み出している請求項1~4のいずれか1項に記載のガラスロール。
- 最外層が、前記保護シートである請求項1~5のいずれか1項に記載のガラスロール。
- 最内層が、前記保護シートである請求項1~6のいずれか1項に記載のガラスロール。
- 前記保護シートが、樹脂製シートである請求項1~7のいずれか1項に記載のガラスロール。
- 前記ダウンドロー法が、オーバーフローダウンドロー法又はリドロー法である請求項1~8のいずれか1項に記載のガラスロール。
- ダウンドロー法によってガラスフィルムを成形する成形部と、前記ガラスフィルムを保護シートに重ねて巻き取る巻取ローラとを備えたガラスロールの製造装置であって、
前記巻取ローラが、前記ガラスフィルムをその表裏面を露出させた状態で、前記保護シートと重ねて巻き取ることを特徴とするガラスロールの製造装置。 - 前記成形部から前記巻取ローラに至るまでの搬送経路上で、前記ガラスフィルムの幅方向両端部に形成される耳部をレーザー切断する切断手段を備えている請求項10に記載のガラスロールの製造装置。
- 前記巻取ローラが、前記成形部の直下位置から側方にずれた位置に配置されると共に、前記成形部を出たガラスフィルムが湾曲して側方の前記巻取ローラに供給される請求項10又は11に記載のガラスロールの製造装置。
- 前記ダウンドロー法が、オーバーフローダウンドロー法又はリドロー法である請求項10~12のいずれか1項に記載のガラスロールの製造装置。
- ダウンドロー法によってガラスフィルムを成形すると共に、巻取ローラで、その成形したガラスフィルムの表裏面を露出させた状態で保護シートに重ねてロール状に巻き取ってガラスロールを形成するガラスロールの製造方法。
- 前記巻取ローラで前記ガラスフィルムを巻き取るまでの段階で、前記ガラスフィルムの幅方向両端部に形成される耳部をレーザー切断する請求項14に記載のガラスロールの製造方法。
- 前記ガラスフィルムよりも前記巻取ローラ側に前記保護シートを配置した状態で、前記ガラスフィルムと前記保護シートとを巻き取ると共に、前記ガラスフィルムの巻き取り方向終端から前記保護シートのみを巻き取って、前記ガラスフィルムの外周面に前記保護シートを巻き付ける請求項14又は15に記載のガラスロールの製造方法。
- 前記保護シートよりも前記巻取ローラ側に前記ガラスフィルムを配置した状態で、前記ガラスフィルムと前記保護シートとを巻き取る請求項14又は15に記載のガラスロールの製造方法。
- 前記ダウンドロー法が、オーバーフローダウンドロー法又はリドロー法である請求項14~17のいずれか1項に記載のガラスロールの製造方法。
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US13/120,981 US8806894B2 (en) | 2008-10-01 | 2009-09-30 | Process for producing glass roll with a separable protective sheet |
CN2009801301982A CN102112379B (zh) | 2008-10-01 | 2009-09-30 | 玻璃辊、玻璃辊的制造装置及玻璃辊的制造方法 |
EP09817789.2A EP2343248B1 (en) | 2008-10-01 | 2009-09-30 | Glass roll, device for producing glass roll, and process for producing glass roll |
US14/327,673 US10781036B2 (en) | 2008-10-01 | 2014-07-10 | Glass roll with a separable protective sheet |
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US20140319001A1 (en) | 2014-10-30 |
EP2343248B1 (en) | 2014-04-23 |
US10781036B2 (en) | 2020-09-22 |
US8806894B2 (en) | 2014-08-19 |
TW201022164A (en) | 2010-06-16 |
EP2343248A1 (en) | 2011-07-13 |
KR101604643B1 (ko) | 2016-03-18 |
CN102112379A (zh) | 2011-06-29 |
CN102112379B (zh) | 2013-06-26 |
US20110177290A1 (en) | 2011-07-21 |
KR20110082107A (ko) | 2011-07-18 |
JP2010132347A (ja) | 2010-06-17 |
EP2343248A4 (en) | 2013-04-03 |
TWI532691B (zh) | 2016-05-11 |
JP5691148B2 (ja) | 2015-04-01 |
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