Glass film and glass bale

Abstract

The utility model provides a glass film and a glass bale body, which are used for preventing the glass film from being damaged in a processing procedure during carrying. A rectangular glass film (1) in which a protective tape (8) is attached to at least two sides (4, 5) extending in the same direction along four sides (2-5) of the glass film (1), a protective tape (8) is attached to at least one of front and back surfaces (11, 12) of the glass film (1), and a portion of the protective tape (8) protrudes from an end surface (9) of the glass film (1).

Description

Technical Field

[0001] The present utility model relates to a glass film and a glass bundle obtained by bundling a plurality of glass films. Background Art

[0002] Mobile terminals such as smartphones and tablets are required to be thin and light. Therefore, for glass substrates assembled in the terminals, the requirement for thinning is increasing. Under this current situation, glass films thinned (for example, with a thickness of 200 μm or less) to a film shape have been developed and manufactured (refer to Patent Document 1).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2023 - 105513 Summary of the Utility Model

[0006] Problems to be Solved by the Utility Model

[0007] When manufacturing glass articles (such as glass substrates) that include a glass film as a constituent element, as one of the manufacturing processes, there are many cases where a process of performing a treatment while transporting a rectangular glass film is included. Examples of the treatment performed on the glass film can include cleaning treatment, cutting treatment, film formation treatment, roughening treatment, etching treatment, heat treatment, etc.

[0008] Since the glass film is extremely thin, it is prone to defects caused by insufficient strength. There is a problem that the glass film is likely to break starting from the two sides extending in the transport direction among the four sides of the glass film during the execution of the above-mentioned process.

[0009] It should be noted that this problem becomes particularly significant when the glass film supplied to the above-mentioned process is glass obtained by the following method.

[0010] This method is as follows: After forming a score line on one surface of a mother glass that is the raw material of the glass film, the mother glass is cut along the score line, and the glass film is cut out from the mother glass. In the case of obtaining a glass film by this method, there are many defects such as minute cracks in the region of one end face of the cut-out glass film (the region close to the surface on which the score line is formed), and the strength of the glass film is likely to be insufficient.

[0011] In view of the above situation, the technical problem to be solved is to avoid breakage of the glass film during the process of performing a treatment during transportation.

[0012] Solutions for Solving the Problem

[0013] The first glass film for solving the above problems is rectangular in shape, and is characterized in that protective tapes are attached along at least two sides extending in the same direction among the four sides of the glass film, protective tapes are attached to at least one of the front and back surfaces of the glass film, and a part of the protective tape protrudes from the end face of the glass film.

[0014] If the treatment is carried out while transporting the first glass film (transporting it in a direction parallel to the two sides extending in the same direction), the following effects can be obtained. That is, by attaching protective tapes along the two sides that are likely to be the starting points of breakage, breakage of the glass film during the treatment can be avoided. Moreover, a part of the protective tape protrudes from the end face of the glass film, and the end face can be appropriately protected, so it is further advantageous in terms of avoiding breakage of the glass film.

[0015] The second glass film is based on the above first glass film, and is configured such that the end face of the glass film has a scratch in either the surface region or the back surface region of the glass film, and a protective tape is attached to at least the surface on which the scratch exists among the front and back surfaces of the glass film.

[0016] If the treatment is carried out while transporting the second glass film, the following effects can be obtained. That is, when the glass film to be treated is a glass cut out from a mother glass by forming a scribed line on the mother glass and cutting the mother glass along the scribed line, there is a scratch on the end face of the glass film. To elaborate, the scratch exists in either the surface region or the back surface region of the end face of the glass film (in the region near the surface on which the scribed line is formed). And there are likely to be many defects such as minute cracks that reduce the strength of the glass film around the scratch. Therefore, if a protective tape is attached to at least the surface on which the scratch exists among the front and back surfaces of the glass film, it is advantageous in terms of avoiding breakage of the glass film.

[0017] The third glass film is based on the above second glass film, and is configured such that a protective tape is attached only to the surface on which the scratch exists among the front and back surfaces of the glass film.

[0018] In the third glass film, since a protective tape is attached only to one of the front and back surfaces of the glass film, the attachment of the protective tape to the glass film can be carried out quickly.

[0019] The fourth glass film is based on any one of the above first to third glass films, and is configured such that the glass film has relatively short sides and relatively long sides, and the protective tape is attached at least along the long sides.

[0020] In the case of comparing the short sides with the long sides, there are likely to be more defects such as minute cracks in the long sides compared to the short sides. Therefore, as in the case of the fourth glass film, if protective tapes are attached at least along the long sides, it is advantageous in terms of protecting the glass film from breakage using the protective tapes.

[0021] The fifth glass film is configured such that protective tapes are attached along all of the four sides or only three of the four sides of the glass film, based on any one of the first to fourth glass films described above.

[0022] In the fifth glass film, protective tapes are attached along three or more of the four sides of the glass film. Therefore, it is further advantageous in terms of protecting the glass film from breakage using the protective tapes. In particular, when protective tapes are attached along all of the four sides, all the sides are protected by the protective tapes, so it is extremely advantageous in terms of protecting the glass film from breakage. On the other hand, when protective tapes are attached along only three sides, when performing a process such as cleaning the glass film with a high-pressure cleaning liquid, it is possible to avoid breakage of the glass film while smoothly discharging the cleaning liquid on the glass film from the side where no protective tape is present.

[0023] The sixth glass film is configured such that the protective tapes overlap each other at the corners of the glass film, based on the fifth glass film described above.

[0024] In the sixth glass film, the protective tapes overlap each other at the corners (corner portions), so the effect of protecting the corners can be improved. Moreover, if the protective tapes are allowed to overlap each other at the corners as in the sixth glass film, the attachment of the protective tapes to the glass film can be performed quickly. As a result, in manufacturing a glass article having a glass film as a component, the manufacturing efficiency can be increased.

[0025] The seventh glass film is configured such that at the corners of the glass film, the front ends in the extending direction of the protective tapes protrude from the glass film, based on any one of the first to sixth glass films described above.

[0026] In the seventh glass film, the front ends in the extending direction of the protective tapes protruding from the glass film can protect the corners of the glass film.

[0027] The eighth glass film is configured such that the dimension by which a part of the protective tape protrudes from the end face of the glass film is 0.5 to 5 mm, and the width of the region where the protective tape is attached to the glass film in the entire width of the protective tape is 3 to 15 mm, based on any one of the first to seventh glass films described above.

[0028] In the eighth glass film, the above-mentioned protruding dimension is 0.5 mm or more, so that the exposed end face of the glass film can be appropriately prevented by the protruding part, and the end face can be sufficiently protected. Therefore, it is more advantageous in terms of avoiding breakage of the glass film. In addition, the above-mentioned protruding dimension is 5 mm or less, so that the situation where the part protruding from the end face becomes an obstacle to the handling and processing of the glass film can be avoided. Moreover, the width of the above-mentioned area is 3 mm or more, so that the protection of the glass film by the protective tape is more sufficient. In addition, the width of the above-mentioned area is 15 mm or less, so that the effective part of the glass film (the part that will become the product later) can also be prevented from being overly narrowed.

[0029] On the basis of any one of the above-mentioned first to eighth glass films, the ninth glass film is configured such that the thickness of the glass film is 200 μm or less. When the lengths of the two relatively short sides among the four sides of the glass film are set as S and the lengths of the two relatively long sides are set as L, the value of L / S is 2.5 or less.

[0030] In the ninth glass film, although the thickness of the glass film is extremely thin at 200 μm or less, as described above, by attaching a protective tape to the glass film, breakage of the glass film can be avoided. In addition, the value of L / S is 2.5 or less, that is, the long sides are 2.5 times or less the length of the short sides, so that the situation where the protective tape has to be attached along the overly long and large sides can be prevented.

[0031] On the basis of any one of the above-mentioned first to ninth glass films, the tenth glass film is characterized in that the protective tape is folded back along the end face of the glass film, and the protective tape is attached from the front surface of the glass film to the back surface.

[0032] In the tenth glass film, both the front and back surfaces of the glass film are protected by the protective tape, so that the protective effect of the glass film by the protective tape can be further improved.

[0033] Any one of the above-mentioned first to tenth glass films can be bundled together in multiple sheets to form a first glass bundle. The first glass bundle includes: a laminate formed by alternately overlapping any one of the above-mentioned first to tenth glass films and a buffer sheet; a pair of protective plates sandwiching the laminate from the front and back sides; and a bundling member surrounding and bundling the laminate and the pair of protective plates.

[0034] In the first glass bundle, each of the multiple glass films included in the bundle is in a state where at least the two sides extending in the same direction are protected by the protective tape. Therefore, the occurrence of a situation where the glass film is broken during the transportation and storage of the bundle can be prevented as much as possible.

[0035] On the basis of the above-mentioned first glass bundle body, the second glass bundle body is configured such that an auxiliary buffer sheet is interposed between the portion of the bundle body where the protective tape is not attached in the glass film and the buffer sheet.

[0036] A height difference is generated corresponding to the thickness of the protective tape between the portion where the protective tape is attached and the portion where the protective tape is not attached in the glass film. When multiple glass films are overlapped in a state where such a height difference exists, a greater stress is likely to act on the portion where the protective tape is attached compared to the portion where the protective tape is not attached. As a result, there is a risk of breakage of the glass film. Therefore, if it has a structure in which an auxiliary buffer sheet is interposed as in the second glass bundle body, the above-mentioned height difference can be filled by the auxiliary buffer sheet. Thus, the risk of breakage of the glass film can be reliably eliminated.

[0037] Utility Model Effect

[0038] According to the glass film in the present utility model, breakage during the processes of handling during transportation can be avoided. Description of the Drawings

[0039] Figure 1 It is a top view showing the glass film.

[0040] Figure 2 It shows Figure 1 A cross-sectional view taken along the A - A section in

[0041] Figure 3 It is a top view showing a modified example of the glass film.

[0042] Figure 4 It is a top view showing a modified example of the glass film.

[0043] Figure 5 It is a cross-sectional view showing a modified example of the glass film.

[0044] Figure 6 It is a partial cross-sectional view showing the glass bundle body.

[0045] Figure 7 It is a partial cross-sectional view showing a modified example of the glass bundle body.

[0046] Figure 8 It is a side view showing the cleaning process in the manufacturing method of the glass article.

[0047] Figure 9 It is a top view showing the cleaning process in the manufacturing method of the glass article.

[0048] Figure 10 It is a top view showing the removal process in the manufacturing method of the glass article.

[0049] Explanation of Reference Numerals

[0050] 1 Glass film

[0051] 2, 3 Short sides

[0052] 4, 5 Long sides

[0053] 8 Protective tape

[0054] 9 End face

[0055] 10 Scratch

[0056] 11 Surface

[0057] 12 Back surface

[0058] 13 Corner

[0059] 14 Glass bundle

[0060] 15 Buffer sheet

[0061] 16 Laminate

[0062] 17 Protective plate

[0063] 18 Binding member

[0064] 20 Auxiliary buffer sheet

[0065] W1 Protrusion dimension

[0066] W2 Width of the attached area Detailed implementation mode

[0067] Hereinafter, embodiments of the glass film and the glass bundle will be described with reference to the drawings. First, the glass film will be described.

[0068] <Glass film>

[0069] In Figure 1 and Figure 2 the glass film 1 is shown. As an example, the glass film 1 is glass for chemical strengthening. The glass film 1 is formed in a rectangular shape (a rectangle in the illustrated example) when viewed from above. The glass film 1 has two relatively short short sides 2, 3 and two relatively long long sides 4, 5.

[0070] The glass film 1 includes an effective portion 6 that becomes a part of the product later and a non-effective portion 7 that does not become a product and is removed later. In Figure 1 and Figure 2In the figure, the boundary between the effective portion 6 and the non-effective portion 7 is shown by a double dotted line. The non-effective portion 7 surrounds the periphery of the effective portion 6, and the above-mentioned four sides 2 to 5 are included in the non-effective portion 7. It should be noted that the non-effective portion 7 is not regarded as a product because it is attached with a protection tape 8 described later and the non-effective portion 7 may be contaminated by the adhesive layer (adhesive) of the protection tape 8.

[0071] As an example, the size (short side × long side) of the glass film 1 is 200×300 mm to 730 to 920 mm. The size of the glass film 1 is not limited to the above range, but the ratio (L / S) of the length S of the short sides 2 and 3 to the length L of the long sides 4 and 5 is 2.5 or less.

[0072] As an example, the thickness of the glass film 1 is 200 μm or less, 100 μm or less, 70 μm or less. It should be noted that, as an example, the lower limit value of the thickness of the glass film 1 is 20 μm. The glass film 1 having a thickness within the above range has a flexibility such that it can be flexed under the action of external force and its own weight.

[0073] The glass film 1 is a glass obtained by the following method. This method is as follows: After forming a score line on one surface of the mother glass that is the raw material of the glass film 1, the mother glass is cut along the score line, and the glass film 1 is cut out from the mother glass. The score line can be formed, for example, by rolling a diamond wheel on one surface of the mother glass. The above method is well-known, so detailed description is omitted. In the glass film 1 obtained by this method, for example, compared with a glass film cut out from the mother glass by laser cutting (laser cutting, laser fusing, etc.), the strength of the four sides 2 to 5 is insufficient.

[0074] Since the glass film 1 is a glass obtained by the above method, the end faces 9 corresponding to the four sides 2 to 5 of the glass film 1 respectively have score marks 10. To describe in detail, the end face 9 has score marks 10 in either the region of the end face 9 close to the surface 11 of the glass film 1 or the region close to the back face 12. In the illustrated example, score marks 10 exist in the region close to the surface 11. That is, in the above method, a score line is formed on one surface of the mother glass corresponding to the surface 11 of the glass film 1. The score marks 10 can be confirmed to exist, for example, by observing the end face 9 using an optical microscope or an electron microscope.

[0075] Protection tapes 8 are respectively attached along the two long sides 4 and 5 that extend in the same direction among the four sides 2 to 5 of the glass film 1. Specifically, the protection tapes 8 are attached over the entire lengths of the two long sides 4 and 5. Moreover, the protection tapes 8 are attached to the surface 11, which is the side where the score marks 10 exist, among the front and back surfaces 11 and 12 of the glass film 1. A height difference is generated by the thickness of the protection tape 8 between the portion of the glass film 1 where the protection tape 8 is attached and the portion where the protection tape 8 is not attached.

[0076] The protective tape 8 is formed by overlapping a sheet-like base material and an adhesive layer. As an example, the material of the base material is polyethylene terephthalate, polyethylene, polyester, polypropylene, cellophane, polystyrene, polycarbonate, polyolefin, triacetyl cellulose, or vinyl chloride. As an example, the adhesive layer is an acrylic-based, urethane-based, rubber-based, or silicone-based adhesive.

[0077] The thickness of the base material is, as an example, 20 to 200 μm, preferably 30 to 100 μm. If the base material is too thin, wrinkles are likely to occur in the protective tape 8 when the protective tape 8 is attached to the glass film 1, and the difficulty of attachment may increase. In addition, if the base material is too thin, the protective tape 8 itself is likely to be damaged, and the effect of protecting the glass film 1 with the protective tape 8 may not be fully obtained. On the other hand, if the base material is too thick, the volume may increase when multiple glass films 1 are overlapped and bundled.

[0078] The adhesive force of the adhesive layer is, as an example, 0.01 to 40 N / 25 mm, preferably 0.1 to 20 N / 25 mm. If the adhesive force is too low, the protective tape 8 is likely to peel off, and the effect of protecting the glass film 1 with the protective tape 8 may not be fully obtained. On the other hand, if the adhesive force is too high, it may be difficult to peel off the protective tape 8 when it is necessary to peel the protective tape 8 from the glass film 1.

[0079] A part of the protective tape 8 protrudes from the end face 9 of the glass film 1. From the viewpoints of appropriately protecting the end face 9 by using the protruding part and avoiding the protruding part from becoming an obstacle to the handling and processing of the glass film 1, as an example, the dimension W1 by which the protective tape 8 protrudes from the end face 9 is set to 0.5 to 5 mm. In the illustrated example, the protruding part is not attached to the end face 9, but it may be attached to the end face 9. It should be noted that depending on the length of the dimension W1, there may be a case different from the illustrated example where the protruding part bends due to its own weight so as to cover the end face 9.

[0080] The front end portion in the extending direction of the protective tape 8 may also protrude from the glass film 1. For example, in Figure 1 , the length of the protective tape 8 is set such that the front end portion of the protective tape 8 attached along the long sides 4 and 5 protrudes from the short sides 2 and 3. According to this scheme, the corner end faces of the glass film 1 can be more reliably protected, and breakage can be suppressed. On the other hand, when there is a concern that the front end portion of the protruding protective tape 8 may interfere with the handling and processing of the glass film 1, the front end portion of the protective tape 8 may also be set at a position where it does not protrude from the glass film 1. In this case, it is preferable to set the length of the protective tape 8 such that the front end of the protective tape 8 is coplanar with the end face of the glass film 1 constituting the short sides 2 and 3. In addition, it may be that the front end portion of the protruding protective tape 8 is folded back from the front side to the back side of the glass film 1, thereby reducing the protruding amount.

[0081] The width W2 of the area where the glass film 1 is attached within the entire width of the protective tape 8 is, for example, 3 to 15 mm, preferably 5 to 10 mm. The reason for setting the width W2 within this range is from the viewpoints of appropriately protecting the glass film 1 using the protective tape 8 and preventing the effective portion 6 of the glass film 1 from becoming overly narrow (the larger the size of the width W2, the narrower the effective portion 6).

[0082] In the present embodiment, the protective tape 8 is attached only along two long sides 4 and 5 out of the four sides 2 to 5 of the glass film 1. However, as a form of attaching the protective tape 8 to the glass film 1, it is also possible to adopt Figure 3 and Figure 4 the modified examples shown.

[0083] In Figure 3 the first modified example shown, the protective tape 8 is attached along three sides out of the four sides 2 to 5 of the glass film 1. More specifically, in addition to the two long sides 4 and 5 of the glass film 1, the protective tape 8 is also attached along one of the two short sides 2 and 3 (the short side 3 in the illustrated example). In Figure 4 the second modified example shown, the protective tape 8 is attached along all of the four sides 2 to 5 of the glass film 1. It should be noted that the form of attaching the protective tape 8 to the short sides 2 and 3 is the same as the form of attaching the protective tape 8 to the two long sides 4 and 5. In the first and second modified examples, the effort of attaching the protective tape 8 to the glass film 1 increases compared to the present embodiment. On the other hand, it is advantageous in terms of protecting the glass film 1 from breakage.

[0084] In the above first and second modified examples, the protective tapes 8, 8 overlap each other at the corner portion 13 (corner part) of the glass film 1. In the illustrated example, the protective tape 8 attached along the short sides 2 and 3 of the glass film 1 overlaps on top of the protective tape 8 attached along the two long sides 4 and 5. It should be noted that it is not necessary for the protective tapes 8, 8 to overlap each other at the corner portion 13. When emphasizing the ease of attaching the protective tape 8 to the glass film 1, it is sufficient to overlap the protective tapes 8, 8. On the other hand, when emphasizing the suppression of the increase in volume when bundling multiple glass films 1 by overlapping, it is sufficient to avoid the overlap of the protective tapes 8, 8.

[0085] In the present embodiment, the protective tape 8 is attached only to the front surface 11 out of the front and back surfaces 11, 12 of the glass film 1. However, as a form of attaching the protective tape 8 to the glass film 1, it is also possible to adopt Figure 5 the modified examples shown.

[0086] In Figure 5In the third modified example shown, the protective tape 8 is folded back along the end face 9 of the glass film 1, and the protective tape 8 is attached from the front surface 11 to the back surface 12 of the glass film 1. That is, the single protective tape 8 is attached in such a manner as to bypass the end face 9 from the front surface 11 side of the glass film 1 to the back surface 12 side. It should be noted that as another modified example, it is also possible to prepare two protective tapes 8, with one of the two attached to the front surface 11 of the glass film 1 and the other attached to the back surface 12.

[0087] Hereinafter, a glass bundle body obtained by bundling a plurality of glass films 1 will be described.

[0088] <Glass bundle body>

[0089] In Figure 6 a glass bundle body 14 is shown. The glass bundle body 14 is used for collectively transporting and storing a plurality of glass films 1. The glass bundle body 14 includes: a laminate 16 formed by alternately overlapping the glass film 1 and the buffer sheet 15 in a flat posture; a pair of protective plates 17, 17 that sandwich the laminate 16 from both the front and back sides; and a bundling member 18 that surrounds and bundles the laminate 16 and the pair of protective plates 17, 17.

[0090] Here, Figure 6 for ease of understanding of the structure of the glass bundle body 14, it is depicted in a state where there are gaps between adjacent components of the glass bundle body 14 (between the glass film 1 and the buffer sheet 15, between the buffer sheet 15 and the protective plate 17). Of course, in reality, there are no gaps between adjacent components (the same is true in Figure 7 referred to later).

[0091] Each glass film 1 included in the laminate 16 is bundled into the glass bundle body 14 in such a manner that the surface (front surface 11) to which the protective tape 8 is attached becomes the upper surface. A gap 19 may be formed between the non-attached area of the protective tape 8 on the upper surface of the glass film 1 and the lower surface of the buffer sheet 15 facing the area due to the thickness of the protective tape 8 (the above-mentioned height difference).

[0092] Each buffer sheet 15 included in the laminate 16 has a larger area than the glass film 1, and the entire circumference of the outer peripheral end of the buffer sheet 15 protrudes from the outer peripheral end of the glass film 1. The uppermost layer and the lowermost layer of the laminate 16 are each composed of a buffer sheet 15, and the buffer sheets 15 of the uppermost layer and the lowermost layer are each in contact with the protective plate 17. As the buffer sheet 15, for example, glass backing paper or a foamed resin sheet can be used.

[0093] Each of the pair of protective plates 17, 17 has a rigidity such that it does not undergo flexural deformation when bundled by the bundling member 18. The area of each protective plate 17 is preferably equal to or larger than the area of the buffer sheet 15, and the entire circumference of the outer peripheral end of each protective plate 17 is coplanar with or protrudes (protrudes in the illustrated example) from the outer peripheral end of the buffer sheet 15. As the protective plate 17, for example, plastic corrugated paper or a polypropylene-based extrusion foam molding can be used.

[0094] The bundling member 18 is formed in a band shape. Depending on the size relationship of the areas among the glass film 1, the buffer sheet 15, and the protective plate 17 described above, the bundling member 18 may come into contact with the pair of protective plates 17, 17 and the laminate 16 (the side surface of the laminate 16), and there may also be a case where it comes into contact with the pair of protective plates 17, 17 but does not come into contact with the laminate 16 (the side surface of the laminate 16). As the bundling member 18, various belts and ropes can be used.

[0095] As the glass bundle 14, a Figure 7 deformation example as shown can also be used. In this deformation example, an auxiliary buffer sheet 20 is disposed in the gap 19 described above. The auxiliary buffer sheet 20 is a sheet for filling the above-mentioned height difference, and is preferably the same thickness as the protective tape 8, but may also be slightly thicker or slightly thinner than the protective tape 8. As the auxiliary buffer sheet 20, for example, glass interleaving paper or a foamed resin sheet can be used.

[0096] Hereinafter, a method for manufacturing a glass article that can utilize the characteristics of the glass film 1 will be described.

[0097] <Method for manufacturing a glass article>

[0098] In Figures 8 to 10 shows a method for manufacturing a glass article. This manufacturing method includes: a cleaning step P1 ( Figure 8 , Figure 9 ), in which the glass film 1 is cleaned with the cleaning liquid 21 while being transported; and a removing step P2 ( Figure 10 ), in which the portion with the protective tape 8 attached is removed from the cleaned glass film 1.

[0099] Figure 8 And Figure 9 The cleaning step P1 shown is an example of a processing step for performing processing on the glass film 1 during transportation. The glass film 1 supplied to the cleaning step P1 is obtained by unpacking the above-mentioned glass bundle 14, and the cleaning step P1 is continuously performed on multiple glass films 1 bundled into the glass bundle 14.

[0100] During the execution of the cleaning step P1, a transport device 22 for transporting the glass film 1 in a flat posture and a plurality of nozzles 23 for supplying the cleaning liquid 21 to the glass film 1 from above are used.

[0101] The conveying device 22 includes a plurality of rollers 24 that convey the glass film 1 in the conveying direction C. A plurality of nozzles 23 are arranged along a direction orthogonal to the conveying direction C, and the cleaning liquid 21 can be supplied over the entire width of the glass film 1 in the width direction (the direction in which the short sides 2 and 3 extend). Each nozzle 23 is located directly above the axis 26 of the roller 24 with the supply port 25 of the cleaning liquid 21 pointing towards the axis 26 of the roller 24. As the cleaning liquid 21, for example, water (high-pressure water) can be used.

[0102] In the cleaning process P1, the glass film 1 is conveyed in a direction parallel to the two long sides 4 and 5. Thus, the glass film 1 is cleaned in a state where the protective tapes 8 are attached to the two sides (the long sides 4 and 5) that extend in the conveying direction C among the four sides 2 to 5 of the glass film 1. In addition, in the cleaning process P1, the glass film 1 is cleaned in a state where the protective tape 8 is attached to the surface 11 that becomes the upper surface among the front and back surfaces 11 and 12 of the glass film 1. After the cleaning liquid 21 supplied to the glass film 1 has cleaned the glass film 1, it is mainly discharged from the glass film 1 through the two sides (the short sides 2 and 3) where the protective tape 8 is not attached.

[0103] In the cleaning process P1, of course, it is also possible to clean the glass films 1 of the first to third modified examples described above instead of the glass film 1 of the present embodiment. In the cleaning of the glass film 1 of the first modified example, in addition to the two sides (the long sides 4 and 5) that extend in the conveying direction C, the protective tape 8 is also attached along one of the remaining two sides (the short sides 2 and 3). The side corresponding to this one can also be the side (the short side 2) at the leading end of the glass film 1, or the side (the short side 3) at the trailing end of the glass film 1.

[0104] In Figure 10 In the removal process P2 shown, when removing the portion of the glass film 1 to which the protective tape 8 is attached, the glass film 1 and the protective tape 8 are cut in parallel. Specifically, the glass film 1 is cut along the boundary between the effective portion 6 and the non-effective portion 7 in the glass film 1 (refer to Figure 1 ) that extends in the same direction as the protective tape 8.

[0105] The cutting of the glass film 1 can be carried out by a known method. For example, the cutting of the glass film 1 can be implemented by forming a scribing line on the glass film 1 and then cutting the glass film 1 along the scribing line. In addition, the cutting can also be implemented by laser cutting (laser cutting, laser fusing, etc.), and can also be implemented by dicing. It is more preferable to further perform an etching process on the end face of the glass film 1 formed by the removal process P2. In this way, the risk of breakage of the glass film 1 after the protection by the protective tape 8 is removed can be eliminated.

[0106] Here, the following modified examples can also be applied to the above manufacturing method.

[0107] In the above manufacturing method, after the execution of the cleaning step P1, a removal step P2 is executed to remove the portion of the glass film 1 to which the protective tape 8 is attached, but it is not limited thereto. Alternatively, after the execution of the cleaning step P1, the protective tape 8 may be peeled off from the glass film 1 instead of the removal step P2. In this case, as the protective tape 8, a tape with as low an adhesive force of the adhesive layer as possible and capable of avoiding contamination of the glass film 1 as much as possible is selected. If the use of this protective tape 8 enables both the peeling of the protective tape 8 from the glass film 1 and the avoidance of contamination of the glass film 1 caused by the adhesive layer, the effective portion 6 of the glass film 1 can be enlarged corresponding to the peeling of the protective tape 8.

[0108] In the above manufacturing method, as an example of the processing step for processing the glass film 1 during transportation, a cleaning step P1 is executed, but it is not limited thereto. Alternatively, as the processing step, instead of the cleaning step P1, a cutting process, a film forming process, a roughening process, an etching process, a heat treatment process, etc. may be executed on the glass film 1 during transportation.

Claims

1. A glass film, which is rectangular in shape, characterized in that, protective tapes are attached along at least two sides extending in the same direction among the four sides of the glass film, the protective tapes are attached to at least one of the front and back surfaces of the glass film, and a part of the protective tapes protrudes from the end face of the glass film.

2. The glass film according to claim 1, characterized in that, the end face of the glass film has a scratch in either the surface region or the back region of the glass film, the protective tape is attached to at least the surface where the scratch exists among the front and back surfaces of the glass film.

3. The glass film according to claim 2, characterized in that, the protective tape is attached to only the surface where the scratch exists among the front and back surfaces of the glass film.

4. The glass film according to claim 1 or 2, characterized in that, the glass film has two relatively short sides and two relatively long sides, the protective tape is attached at least along the long sides.

5. The glass film according to claim 1 or 2, characterized in that, the protective tape is attached along only three sides or all four sides among the four sides of the glass film.

6. The glass film according to claim 5, characterized in that, the protective tapes overlap each other at the corners of the glass film.

7. The glass film according to claim 1 or 2, characterized in that, at the corners of the glass film, the front ends of the extending directions of the protective tapes protrude from the glass film.

8. The glass film according to claim 1 or 2, characterized in that, the size of the part of the protective tape protruding from the end face of the glass film is 0.5 - 5 mm, and the width of the region where the protective tape is attached to the glass film in the entire width of the protective tape is 3 - 15 mm.

9. The glass film according to claim 1 or 2, characterized in that, the thickness of the glass film is 200 μm or less, when the lengths of the two relatively short sides among the four sides of the glass film are set as S and the lengths of the two relatively long sides are set as L, the value of L / S is 2.5 or less.

10. The glass film according to claim 1 or 2, characterized in that, the protective tape is folded back along the end face of the glass film, and the protective tape is attached from the front surface to the back surface of the glass film.

11. A glass bundle, characterized in that, the glass bundle includes: a laminate formed by alternately overlapping the glass film according to any one of claims 1 - 10 and a buffer sheet; a pair of protective plates sandwiching the laminate from the front and back sides; and a bundling member surrounding and bundling the laminate and the pair of protective plates.

12. The glass bundle according to claim 11, characterized in that, auxiliary buffer sheets are interposed between the parts of the glass film where the protective tape is not attached and the buffer sheet in the glass bundle.

Images