Method for manufacturing glass article, glass film, and glass package

Abstract

To avoid breakage of a glass film when executing a step of applying treatment to a glass film in transit when manufacturing a glass article using a glass film as a component.SOLUTION: A method for manufacturing a glass article includes a treatment process (cleaning process P1) of applying treatment while transporting a rectangular glass film 1. In the treatment process (cleaning process P1), treatment (cleaning) is applied to the glass film 1 while a protective tape 8 is attached along at least two sides 4, 5 extending in a transportation direction of the four sides 2-5 of the glass film 1.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to a method for manufacturing a glass article including a step of treating a glass film during transportation, a glass film suitable for the manufacturing method, and a glass package in which a plurality of glass films are packaged. [Background technology]

[0002] Mobile terminals such as smartphones and tablets are required to be thin and lightweight. For this reason, there is an increasing demand for thinner glass substrates to be incorporated into terminals. Under these circumstances, glass films that are as thin as a film (for example, 200 μm or less in thickness) have been developed and manufactured (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-105513 A Summary of the Invention [Problem to be solved by the invention]

[0004] When manufacturing a glass article (e.g., a glass substrate) having a glass film as a component, a manufacturing process often includes a process of treating a rectangular glass film while transporting it. Examples of the treatments that can be applied to the glass film include a cleaning process, a cutting process, a film formation process, a surface roughening process, an etching process, and a heat treatment.

[0005] Since the glass film is extremely thin, defects due to insufficient strength are likely to occur. During the above steps, there is a problem that the glass film is likely to be broken starting from two of the four sides of the glass film that extend in the conveying direction.

[0006] This problem becomes particularly noticeable when the glass film subjected to the above steps is glass obtained by the following method.

[0007] In this method, a scribe line is formed on one side of the mother glass that is the base of the glass film, and then the mother glass is broken along the scribe line to cut out the glass film from the mother glass. When a glass film is obtained by this method, many defects such as microcracks are present in the region near one side of the edge face of the cut glass film (the region near the side where the scribe line was formed), and the strength of the glass film is likely to be insufficient.

[0008] In view of the above circumstances, a technical problem to be solved is to avoid damage to the glass film when performing a process of treating the glass film during transportation in producing a glass article having a glass film as a component. [Means for solving the problem]

[0009] A first method for manufacturing a glass article to solve the above problem is a method for manufacturing a glass article including a processing step of processing a rectangular glass film while transporting it, characterized in that in the processing step, the glass film is processed in a state in which protective tape is attached along at least two of the four sides of the glass film that extend in the transport direction.

[0010] In the first method for manufacturing a glass article, a protective tape is attached to at least two sides extending in the conveying direction of a rectangular glass film to be subjected to a processing step. By attaching the protective tape to the two sides that are likely to become the starting points of breakage in this manner, it is possible to prevent the glass film from being broken during the processing step.

[0011] The second method for producing a glass article is the above-mentioned first production method, except that in the treating step, the glass film is subjected to a treatment of cleaning with a cleaning liquid.

[0012] In the second method for manufacturing a glass article, even when a high-pressure cleaning liquid is supplied to the glass film to clean the glass film, damage to the glass film can be avoided by attaching a protective tape to the glass film as described above.

[0013] The third manufacturing method for a glass article is a method similar to the second manufacturing method described above, in which a cleaning liquid is supplied to the glass film from above while the glass film is transported in a flat position, and a protective tape is applied to at least the top surface of the front and back surfaces of the glass film, and the protective tape is applied along only two of the four sides of the glass film that extend in the transport direction, or only three sides including the two sides that extend in the transport direction.

[0014] In the third method for manufacturing a glass article, a protective tape is applied to at least the upper surface of the front and back surfaces of the glass film transported in a flat position. That is, the protective tape is applied to the surface that receives the supply of cleaning liquid. The protective tape is applied only along two sides of the glass film that extend in the transport direction, or only along three sides including the two sides, and is not applied along all four sides. This makes it possible to smoothly remove the cleaning liquid on the glass film from the sides where the protective tape is not present.

[0015] A fourth method for manufacturing a glass article is a method according to any one of the first to third manufacturing methods described above, in which, after the treatment step, a removal step is carried out in which the glass film is cut parallel to the protective tape and the portion of the glass film to which the protective tape is attached is removed.

[0016] In the fourth method for manufacturing a glass article, the portion to which the protective tape is attached is removed from the glass film by performing the removal step. This eliminates the need to peel off the protective tape, which is not necessary for the final glass article, from the glass film. Here, the outer peripheral edge of the glass film, including the four sides, is often removed from the glass film as an unnecessary portion during the process until the manufacturing of the glass article is completed. In other words, since the portion to which the protective tape is attached (outer peripheral edge) is often a portion that must be removed from the glass film at some point, removing the protective tape from the glass film together with the protective tape in the removal step is advantageous in terms of improving the manufacturing efficiency of the glass article.

[0017] A fifth method for manufacturing a glass article is any one of the first to fourth manufacturing methods described above, wherein an edge face of the glass film has scribe marks in either an area toward the front face or an area toward the back face of the glass film, and a protective tape is attached to at least the surface of the front or back face of the glass film on which the scribe marks are present, and a portion of the protective tape is allowed to protrude beyond the edge face of the glass film.

[0018] When the glass film to be subjected to the treatment step is glass cut from the mother glass by forming a scribe line on the mother glass and breaking the mother glass along the scribe line, the end surface of the glass film has a scribe mark. More specifically, the scribe mark is present on the end surface of the glass film in either a region closer to the front surface of the glass film or a region closer to the back surface of the glass film (in a region closer to the surface where the scribe line was formed). In addition, many defects such as microcracks that reduce the strength of the glass film tend to exist around the scribe mark. Therefore, as in the fifth method for producing a glass article, if a protective tape is attached to at least the surface on the side where the scribe mark exists among the front and back surfaces of the glass film, it is advantageous in avoiding breakage of the glass film. Furthermore, in this production method, a part of the protective tape is protruded from the end surface of the glass film, and the end surface can be suitably protected, which is further advantageous in avoiding breakage of the glass film.

[0019] The sixth method for manufacturing a glass article is the fifth manufacturing method described above, except that the dimension of the protective tape that protrudes from the edge face of the glass film is 0.5 to 5 mm, and the width of the area of ​​the protective tape that is attached to the glass film is 3 to 15 mm of the total width of the protective tape.

[0020] In the sixth method for manufacturing a glass article, the protruding dimension is 0.5 mm or more, so that the protruding portion appropriately prevents the end surface of the glass film from being exposed, and the end surface can be sufficiently protected. This is more advantageous in avoiding damage to the glass film. In addition, the protruding dimension is 5 mm or less, so that the protruding portion from the end surface can be prevented from interfering with the transportation or processing of the glass film. Furthermore, the width of the above region is 3 mm or more, so that the protection tape can more sufficiently protect the glass film. In addition, the width of the above region is 15 mm or less, so that the effective portion of the glass film (the portion that will later become the product) can be prevented from being excessively narrowed.

[0021] The seventh method for manufacturing a glass article is the fifth or sixth manufacturing method described above, except that a protective tape is attached only to the surface on which the scribe marks are present among the front and back surfaces of the glass film.

[0022] In the seventh method for producing a glass article, it is only necessary to apply the protective tape to only one of the front and back surfaces of the glass film, and therefore it is possible to quickly apply the protective tape to the glass film.

[0023] The eighth method for manufacturing a glass article is any one of the first to sixth manufacturing methods described above, in which the protective tape is folded back along the edge face of the glass film and the protective tape is attached from the front surface to the back surface of the glass film.

[0024] In the eighth method for manufacturing a glass article, both the front and back surfaces of the glass film are protected by the protective tape, so that it is possible to further enhance the effect of protecting the glass film by the protective tape.

[0025] A ninth manufacturing method for a glass article is any one of the first to eighth manufacturing methods described above, wherein the thickness of the glass film is 200 μm or less, and when the length of two relatively short sides of the four sides of the glass film is S and the length of two relatively long sides is L, the value of (L / S) is 2.5 or less.

[0026] In the ninth method for manufacturing a glass article, even though the thickness of the glass film is extremely thin at 200 μm or less, by attaching a protective tape to the glass film as described above, damage to the glass film can be avoided. In addition, by making the (L / S) value 2.5 or less, that is, by making the length of the two longer sides 2.5 times or less than the length of the two shorter sides, a situation in which the protective tape must be attached along an excessively long side can be prevented.

[0027] The first glass film for solving the above problem is a rectangular glass film, characterized in that protective tape is attached along at least two of the four sides of the glass film that extend in the same direction, protective tape is 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 edge surface of the glass film.

[0028] If the first glass film is treated while being transported (transported in a direction parallel to the two sides extending in the same direction), it is possible to obtain the same functions and effects as those described above for the first method for manufacturing a glass article. Furthermore, since a part of the protective tape protrudes from the edge face of the glass film, the edge face can be suitably protected, which is further advantageous in avoiding damage to the glass film.

[0029] The second glass film is the first glass film described above, except that an edge of the glass film has scribe marks in either an area toward the front surface or an area toward the back surface of the glass film, and a protective tape is attached to at least the surface of the front or back surface of the glass film where the scribe marks are present.

[0030] If the second glass film is treated while being transported, it is possible to obtain the same functions and effects as those described above for the fifth method for producing a glass article.

[0031] The third glass film is the first or second glass film described above, wherein the glass film has two relatively short sides and two relatively long sides, and the protective tape is attached along at least the two long sides.

[0032] When comparing the two short sides with the two long sides, the two long sides are more likely to have defects such as microcracks than the two short sides. Therefore, if protective tape is attached at least along the two long sides, as in the third glass film, it is advantageous in protecting the glass film from breakage with the protective tape.

[0033] The fourth glass film is any one of the first to third glass films described above, in which protective tape is attached along only three sides or all of the four sides of the glass film.

[0034] In the fourth glass film, the protective tape is attached along three or more of the four sides of the glass film. This is more advantageous in protecting the glass film from breakage by the protective tape. In particular, when the protective tape is attached along all four sides, all sides are protected by the protective tape, which is extremely advantageous in protecting the glass film from breakage.

[0035] The fifth glass film is the above-mentioned fourth glass film, except that the protective tapes overlap each other at the corners of the glass film.

[0036] In the fifth glass film, the protective tapes overlap each other at the corners, which enhances the effect of protecting the corners. Furthermore, by allowing the protective tapes to overlap each other at the corners, as in the fifth glass film, the protective tapes can be quickly attached to the glass film. As a result, this makes it possible to improve the manufacturing efficiency when manufacturing glass articles having the glass film as a component.

[0037] A sixth glass film is any one of the first to fifth glass films described above, wherein a leading end of the protective tape in the extending direction protrudes from the glass film at a corner of the glass film.

[0038] In the sixth glass film, the corners of the glass film can be protected by the leading end in the extension direction of the protective tape protruding from the glass film.

[0039] Any one of the first to sixth glass films can be packaged together to form a first glass package. The first glass package includes a laminate in which any one of the first to sixth glass films and buffer sheets are alternately stacked, a pair of protective plates that sandwich the laminate from both the front and back sides, and a binding material that surrounds and binds the laminate and the pair of protective plates.

[0040] In the first glass package, at least two sides extending in the same direction of each of the multiple glass films included in the package are protected by protective tape, so that the glass films can be prevented from being damaged as much as possible during transportation or storage of the package.

[0041] The second glass packaging body is configured such that an auxiliary buffer sheet is interposed between the portion of the glass film where no protective tape is attached and the buffer sheet in the first glass packaging body described above.

[0042] Between the portion of the glass film where the protective tape is attached and the portion where the protective tape is not attached, a step occurs by the thickness of the protective tape. When multiple glass films are stacked with this step, the portion where the protective tape is attached is more likely to be subjected to a large stress than the portion where the protective tape is not attached. This creates a risk of the glass film being damaged. Therefore, if an auxiliary buffer sheet is interposed as in the second glass package, the auxiliary buffer sheet can fill the step. Therefore, the risk of the glass film being damaged can be accurately eliminated. Effect of the Invention

[0043] According to the glass article manufacturing method and glass film of the present disclosure, when manufacturing a glass article having a glass film as a component, it is possible to avoid damage to the glass film when performing a process of treating the glass film during transportation. [Brief description of the drawings]

[0044] [Figure 1] FIG. 2 is a plan view showing a glass film. [Diagram 2] 2 is a cross-sectional view showing the section AA in FIG. 1. [Diagram 3] FIG. 11 is a plan view showing a modified example of the glass film. [Figure 4] FIG. 11 is a plan view showing a modified example of the glass film. [Diagram 5] FIG. 11 is a cross-sectional view showing a modified example of the glass film. [Figure 6] FIG. 2 is a partial cross-sectional view showing a glass package. [Figure 7] FIG. 11 is a partial cross-sectional view showing a modified example of the glass package. [Figure 8] FIG. 2 is a side view showing a cleaning step in the method for manufacturing a glass article. [Figure 9] FIG. 2 is a plan view showing a cleaning step in the manufacturing method of a glass article. [Figure 10] FIG. 4 is a plan view showing a removal step in the method for manufacturing a glass article. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] Hereinafter, embodiments of a method for manufacturing a glass article, a glass film, and a glass package will be described with reference to the accompanying drawings. First, the glass film will be described.

[0046] <Glass film> 1 and 2 show a glass film 1. The glass film 1 is, for example, glass for chemical strengthening. The glass film 1 is formed in a rectangular shape (rectangle in the illustrated example) in a plan view. The glass film 1 has two relatively short short sides 2 and 3 and two relatively long long sides 4 and 5.

[0047] The glass film 1 includes an effective portion 6 which is a portion that will later become a product, and a non-effective portion 7 which is a portion that will not become a product and will later be removed. In Fig. 1 and Fig. 2, the boundary between the effective portion 6 and the non-effective portion 7 is indicated by a two-dot chain 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. The reason why the non-effective portion 7 is not considered to be a product is that the non-effective portion 7 may be contaminated by the adhesive layer (adhesive) of the protective tape 8, which will be described later, when the protective tape 8 is attached.

[0048] The size (short side × long side) of the glass film 1 is, for example, 200 × 300 mm to 730 to 920 mm. Although the size of the glass film 1 is not limited to the above range, the ratio (L / S) of the length S of the short sides 2, 3 to the length L of the long sides 4, 5 is 2.5 or less.

[0049] The thickness of the glass film 1 is, for example, 200 μm or less, 100 μm or less, or 70 μm or less. The lower limit of the thickness of the glass film 1 is, for example, 20 μm. The glass film 1 having a thickness in the above range has flexibility to the extent that bending deformation occurs due to an external force or its own weight.

[0050] The glass film 1 is glass obtained by the following method. In this method, scribe lines are formed on one side of mother glass, which is the base of the glass film 1, and then the mother glass is cut along the scribe lines to cut the glass film 1 from the mother glass. The scribe lines can be formed, for example, by rolling a diamond wheel on one side of the mother glass. Since the above method is well known, a detailed description is omitted. The glass film 1 obtained by this method has insufficient strength at the four sides 2 to 5, for example, compared to a glass film cut from mother glass by laser cutting (laser cutting, laser melting, etc.).

[0051] Since the glass film 1 is glass obtained by the above method, the four end faces 9 corresponding to the four sides 2 to 5 of the glass film 1 each have scribe marks 10. More specifically, the end face 9 has the scribe marks 10 in either a region closer to the front surface 11 of the glass film 1 or a region closer to the back surface 12 of the end face 9. In the illustrated example, the scribe marks 10 are present in the region closer to the front surface 11. That is, in the above method, scribe lines are formed on one surface of the mother glass corresponding to the front surface 11 of the glass film 1. The presence of the scribe marks 10 can be confirmed by observing the end face 9 with, for example, an optical microscope or an electron microscope.

[0052] Of the four sides 2 to 5 of the glass film 1, protective tape 8 is attached along each of two long sides 4, 5 extending in the same direction. In detail, protective tape 8 is attached over the entire length of the two long sides 4, 5. Furthermore, protective tape 8 is attached to front surface 11, which is the surface on the side on which scribe marks 10 exist, of front and back surfaces 11, 12 of the glass film 1. A step is generated between the area of ​​the glass film 1 to which protective tape 8 is attached and the area to which it is not attached, the step being equal to the thickness of protective tape 8.

[0053] The protective tape 8 is formed by laminating a sheet-like base material and an adhesive layer. Examples of the material of the base material include polyethylene terephthalate, polyethylene, polyester, polypropylene, cellophane, polystyrene, polycarbonate, polyolefin, triacetyl cellulose, and vinyl chloride. Examples of the adhesive layer include an acrylic, urethane, rubber, or silicone adhesive.

[0054] The thickness of the substrate is, for example, 20 to 200 μm, and preferably 30 to 100 μm. If the substrate is too thin, wrinkles may easily occur in the protective tape 8 when the protective tape 8 is applied to the glass film 1, which may increase the difficulty of application. Furthermore, if the substrate is too thin, the protective tape 8 itself may be easily damaged, which may prevent the protective tape 8 from providing a sufficient effect of protecting the glass film 1. On the other hand, if the substrate is too thick, the substrate may be bulky when multiple glass films 1 are stacked and packed.

[0055] The adhesive strength of the adhesive layer is, for example, 0.01 to 40 N / 25 mm, and preferably 0.1 to 20 N / 25 mm. If the adhesive strength is too low, the protective tape 8 may be easily peeled off, and the protective tape 8 may not be able to sufficiently protect the glass film 1. On the other hand, if the adhesive strength is too high, when it becomes necessary to peel the protective tape 8 from the glass film 1, peeling may be difficult.

[0056] A part of the protective tape 8 protrudes from the edge surface 9 of the glass film 1. From the viewpoint of providing appropriate protection for the edge surface 9 with the protruding portion and from the viewpoint of preventing the protruding portion from interfering with transportation and processing of the glass film 1, a dimension W1 by which the protective tape 8 protrudes from the edge surface 9 is, for example, 0.5 to 5 mm. In the illustrated example, the protruding portion is not attached to the edge surface 9, but may be attached thereto. Depending on the length of the dimension W1, the protruding portion may bend under its own weight to cover the edge surface 9, unlike the illustrated example.

[0057] The leading end of the protective tape 8 in the extension direction may protrude from the glass film 1. For example, in FIG. 1, the length of the protective tape 8 is set so that the leading end of the protective tape 8 applied along the long sides 4 and 5 protrudes from the short sides 2 and 3. According to such an embodiment, the corner end face of the glass film 1 can be protected more reliably and damage can be suppressed. On the other hand, if there is a concern that the leading end of the protective tape 8 protruding may hinder the transportation or processing of the glass film 1, the leading end of the protective tape 8 may 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 so that the leading end of the protective tape 8 is flush with the end faces of the glass film 1 that constitute the short sides 2 and 3. In addition, the leading end of the protective tape 8 protruding may be folded back from the front side to the back side of the glass film 1 to reduce the amount of protrusion.

[0058] Of the total width of the protective tape 8, the width W2 of the region attached to the glass film 1 is, for example, 3 to 15 mm, and preferably 5 to 10 mm. The reason why the width W2 is within this range is from the viewpoint of providing appropriate protection for the glass film 1 with the protective tape 8 and from the viewpoint of preventing the effective portion 6 of the glass film 1 from becoming excessively narrow (the larger the dimension of the width W2, the narrower the effective portion 6 becomes).

[0059] In this embodiment, the protective tape 8 is attached only along two long sides 4, 5 of the four sides 2 to 5 of the glass film 1. However, as a form for attaching the protective tape 8 to the glass film 1, modified examples as shown in Figs. 3 and 4 may also be adopted.

[0060] In a first modified example shown in FIG. 3, the protective tape 8 is applied along three of the four sides 2 to 5 of the glass film 1. More specifically, the protective tape 8 is applied along one of the two short sides 2 and 3 (short side 3 in the illustrated example) in addition to the two long sides 4 and 5 of the glass film 1. In a second modified example shown in FIG. 4, the protective tape 8 is applied along all of the four sides 2 to 5 of the glass film 1. Note that the manner in which the protective tape 8 is applied to the short sides 2 and 3 is the same as the manner in which it is applied to the two long sides 4 and 5. In the first and second modified examples, the effort required to apply the protective tape 8 to the glass film 1 is increased compared to the present embodiment, but this is advantageous in terms of protecting the glass film 1 from breakage.

[0061] In the above first and second modified examples, the protective tapes 8,8 overlap each other at the corners 13 (corner portions) of the glass film 1. In the illustrated example, the protective tape 8 attached along the short side 2 and short side 3 of the glass film 1 overlaps the protective tape 8 attached along the two long sides 4, 5. It is not essential that the protective tapes 8,8 overlap each other at the corners 13. When emphasis is placed on ease of attachment of the protective tape 8 to the glass film 1, the protective tapes 8,8 may be overlapped. On the other hand, when emphasis is placed on reducing bulk when multiple glass films 1 are stacked and packed, the protective tapes 8,8 may be prevented from overlapping each other.

[0062] In this embodiment, the protective tape 8 is attached only to the front surface 11 of the front and back surfaces 11 and 12 of the glass film 1. However, as a form for attaching the protective tape 8 to the glass film 1, a modified example as shown in FIG.

[0063] 5 , the protective tape 8 is folded back along the edge surface 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, a single protective tape 8 is attached so as to wrap around the edge surface 9 from the front surface 11 side to the back surface 12 side of the glass film 1. Note that, as yet another modified example, two protective tapes 8 may be prepared, and one of the two tapes may be attached to the front surface 11 of the glass film 1, and the other may be attached to the back surface 12.

[0064] Hereinafter, a glass package in which a plurality of glass films 1 are packaged will be described.

[0065] <Glass packaging> 6 shows a glass packaging body 14. The glass packaging body 14 is for transporting and storing a plurality of glass films 1 collectively. The glass packaging body 14 includes a laminate 16 in which glass films 1 and buffer sheets 15 are alternately stacked in a flat position, a pair of protective plates 17, 17 that sandwich the laminate 16 from both the front and back sides, and a binding material 18 that surrounds and binds the laminate 16 and the pair of protective plates 17, 17.

[0066] 6 illustrates a state in which a gap is provided between adjacent components of the glass packaging body 14 (between the glass film 1 and the buffer sheet 15, and between the buffer sheet 15 and the protective plate 17) in order to facilitate understanding of the structure of the glass packaging body 14. Of course, in reality, there is no gap between adjacent components (the same applies to FIG. 7 to be referred to later).

[0067] Each glass film 1 included in the laminate 16 is packaged in the glass package 14 so that the surface (surface 11) to which the protective tape 8 is attached faces up. Due to the thickness of the protective tape 8 (the above-mentioned step), a gap 19 may be formed between the region on the upper surface of the glass film 1 to which the protective tape 8 is not attached and the lower surface of the buffer sheet 15 facing the region.

[0068] Each buffer sheet 15 included in the laminate 16 has an area larger than that of the glass film 1, and the entire circumference of the outer peripheral edge of the buffer sheet 15 protrudes beyond the outer peripheral edge of the glass film 1. The uppermost and lowermost layers of the laminate 16 are each constituted by a buffer sheet 15, and the uppermost and lowermost buffer sheets 15 each come into contact with a protective plate 17. As the buffer sheet 15, for example, a glass interleaving paper or a foamed resin sheet can be used.

[0069] Each of the pair of protective plates 17, 17 has a rigidity sufficient to prevent bending deformation when bound by the binding material 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 periphery of the outer periphery of each protective plate 17 is flush with or protrudes from the outer periphery of the buffer sheet 15 (protruding in the illustrated example). For example, plastic cardboard or a polypropylene extruded foam can be used as the protective plate 17.

[0070] The binding material 18 is formed in a belt shape. Depending on the area relationship between the glass film 1, the buffer sheet 15, and the protective plate 17, the binding material 18 may contact the pair of protective plates 17, 17 and the laminate 16 (side surface of the laminate 16), or may contact the pair of protective plates 17, 17 but not the laminate 16 (side surface of the laminate 16). As the binding material 18, various tapes and bands can be used.

[0071] As the glass package 14, a modified example as shown in Fig. 7 can also be adopted. In this modified example, an auxiliary buffer sheet 20 is disposed in the gap 19. The auxiliary buffer sheet 20 is a sheet for filling the above-mentioned step, and preferably has the same thickness as the protective tape 8, but may be slightly thicker or slightly thinner than the protective tape 8. As the auxiliary buffer sheet 20, for example, a glass interleaving paper or a foamed resin sheet can be adopted.

[0072] Hereinafter, a method for producing a glass article having the glass film 1 as a component will be described.

[0073] <Method of manufacturing glass article> 8 to 10 show a method for manufacturing a glass article. The method includes a cleaning step P1 (FIGS. 8 and 9) in which the glass film 1 is cleaned with a cleaning liquid 21 while being transported, and a removal step P2 (FIG. 10) in which the portion to which the protective tape 8 is attached is removed from the cleaned glass film 1.

[0074] 8 and 9 is an example of a treatment process for treating the glass film 1 during transportation. The glass film 1 subjected to the cleaning process P1 is obtained by unpacking the above-mentioned glass package 14, and the cleaning process P1 is continuously performed on a plurality of glass films 1 packaged in the glass package 14.

[0075] The cleaning step P1 is performed using a conveying device 22 that conveys the glass film 1 in a flat-laid position and a plurality of nozzles 23 that supply the cleaning liquid 21 to the glass film 1 from above.

[0076] The conveying device 22 includes a plurality of rollers 24 that feed the glass film 1 in the conveying direction C. The plurality of nozzles 23 are arranged along a direction perpendicular to the conveying direction C, and the plurality of nozzles 23 can supply the cleaning liquid 21 to the entire width of the glass film 1 in the width direction (the direction in which the short sides 2, 3 extend). Each nozzle 23 is positioned directly above the shaft 26 of the roller 24 such that a supply port 25 of the cleaning liquid 21 is directed toward the shaft 26. As the cleaning liquid 21, for example, water (high-pressure water) can be used.

[0077] In the cleaning process P1, the glass film 1 is transported in a direction parallel to the two long sides 4, 5. As a result, the glass film 1 is cleaned in a state in which the protective tape 8 is attached along two sides (long sides 4, 5) of the four sides 2 to 5 of the glass film 1 that extend in the transport direction C. In addition, in the cleaning process P1, the glass film 1 is cleaned in a state in which the protective tape 8 is attached to the front surface 11, which is the upper surface of the front and back surfaces 11, 12 of the glass film 1. After cleaning the glass film 1, the cleaning liquid 21 supplied to the glass film 1 is removed from the glass film 1 mainly through the two sides (short sides 2, 3) to which the protective tape 8 is not attached.

[0078] In the cleaning step P1, it is naturally possible to clean the glass films 1 of the above-mentioned first to third modified examples instead of the glass film 1 of the present embodiment. When cleaning the glass film 1 of the first modified example, in addition to the two sides (long sides 4, 5) extending in the conveyance direction C, the protective tape 8 is attached along one of the remaining two sides (short sides 2, 3). This other side may be the side located at the front of the glass film 1 (short side 2) or the side located at the rear of the glass film 1 (short side 3).

[0079] 10, when removing the portion of the glass film 1 to which the protective tape 8 is attached, the glass film 1 is cut parallel to the protective tape 8. In detail, the glass film 1 is cut along a boundary extending in the same direction as the protective tape 8, among the boundaries between the effective portion 6 and the non-effective portion 7 in the glass film 1 (see FIG. 1).

[0080] The glass film 1 can be cut by a known method. For example, the glass film 1 can be cut by forming a scribe line on the glass film 1 and cleaving the glass film 1 along the scribe line. Alternatively, the glass film 1 can be cut by laser cutting (laser cleaving, laser melting, etc.) or by dicing. It is more preferable to further subject the end surface formed on the glass film 1 in the removal step P2 to an etching treatment. In this way, the risk of damage to the glass film 1 that is no longer protected by the protective tape 8 can be eliminated.

[0081] Here, the following modified examples can also be applied to the above embodiment.

[0082] In the above embodiment, after the cleaning step P1, the removal step P2 is performed to remove the portion where the protective tape 8 is attached from the glass film 1, but the present invention is not limited to this. After 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, a tape having an adhesive layer with as low adhesive strength as possible and capable of preventing contamination of the glass film 1 as much as possible is selected as the protective tape 8. By using this protective tape 8 to realize both the peeling of the protective tape 8 from the glass film 1 and the prevention of contamination of the glass film 1 by the adhesive layer, it is possible to expand the effective portion 6 of the glass film 1 by the amount of the protective tape 8 that is peeled off.

[0083] In the above embodiment, the cleaning process P1 is performed as an example of a process for performing a process on the glass film 1 during transport, but the present invention is not limited to this. As a process, instead of the cleaning process P1, a cutting process, a film forming process, a surface roughening process, an etching process, a heat treatment, or the like may be performed on the glass film 1 during transport. [Explanation of symbols]

[0084] 1 Glass film 2,3 Short side 4,5 long side 8 Protective Tape 9 End face 10 Scribe marks 11 Surface 12 Back side 13 Corner 14 Glass packaging 15 Cushioning sheet 16 Laminate 17 Protective plate 18 Binding material 20 Auxiliary cushioning sheet 21 Cleaning Solution P1 Cleaning process (treatment process) P2 removal process W1 protruding dimension W2 Width of the area to be pasted

Claims

1. A method for manufacturing a glass article, comprising a treatment step of treating a rectangular glass film while transporting the glass film, The method for manufacturing a glass article, wherein the processing step comprises processing the glass film in a state in which protective tape is attached along at least two of the four sides of the glass film that extend in a conveyance direction.

2. The method for manufacturing a glass article according to claim 1 , wherein the treatment step includes a treatment of cleaning the glass film with a cleaning liquid.

3. supplying the cleaning liquid to the glass film from above while transporting the glass film in a flat position; The protective tape is attached to at least the upper surface of the front and rear surfaces of the glass film, The method for manufacturing a glass article according to claim 2, characterized in that the protective tape is attached along only two of the four sides of the glass film that extend in the conveying direction, or along only three sides including the two sides that extend in the conveying direction.

4. The method for manufacturing a glass article according to any one of claims 1 to 3, characterized in that after the processing step, a removal step is carried out, in which the glass film is cut parallel to the protective tape and a portion to which the protective tape is attached is removed from the glass film.

5. an end surface of the glass film has a scribe mark in either a region closer to a front surface or a region closer to a back surface of the glass film; The method for manufacturing a glass article according to any one of claims 1 to 3, characterized in that the protective tape is attached to at least the surface of the front and back surfaces of the glass film on which the scribe marks are present, and a portion of the protective tape is allowed to protrude from an edge surface of the glass film.

6. The dimension of the protective tape protruding from the end surface of the glass film is 0.5 to 5 mm, The method for manufacturing a glass article according to claim 5, wherein the width of the region of the protective tape that is attached to the glass film is set to 3 to 15 mm out of the total width of the protective tape.

7. The method for manufacturing a glass article according to claim 5 , wherein the protective tape is attached only to one of the front and back surfaces of the glass film on which the scribe marks are present.

8. The method for manufacturing a glass article according to any one of claims 1 to 3, characterized in that the protective tape is folded back along an edge face of the glass film, and the protective tape is attached from the front surface to the back surface of the glass film.

9. The thickness of the glass film is 200 μm or less, The method for manufacturing a glass article according to any one of claims 1 to 3, characterized in that, when the length of two relatively short sides of the four sides of the glass film is S and the length of two relatively long sides is L, a value of (L / S) is 2.5 or less.

10. A rectangular glass film, A protective tape is attached along at least two of the four sides of the glass film that extend in the same direction; The glass film is characterized in that the protective tape is attached to at least one of the front and back surfaces of the glass film, and a part of the protective tape protrudes from an edge surface of the glass film.

11. an end surface of the glass film has a scribe mark in either a region closer to the front surface or a region closer to the back surface of the glass film; The glass film according to claim 10, wherein the protective tape is attached to at least one of the front and back surfaces of the glass film on the side on which the scribe marks are present.

12. The glass film has two relatively short sides and two relatively long sides, The glass film according to claim 10 or 11, wherein the protective tape is attached along at least the two long sides.

13. The glass film according to claim 10 or 11, wherein the protective tape is attached along only three sides or along all four sides of the glass film.

14. The glass film according to claim 13 , wherein the protective tapes overlap each other at corners of the glass film.

15. The glass film according to claim 10 or 11, wherein a tip end of the protective tape in an extension direction protrudes from the glass film at a corner of the glass film.

16. A laminate in which the glass film according to claim 10 or 11 and a buffer sheet are alternately stacked; A pair of protective plates sandwiching the laminate from both the front and back sides; A binding material that surrounds and binds the laminate and the pair of protective plates; A glass package comprising:

17. The glass package according to claim 16, further comprising an auxiliary buffer sheet interposed between the buffer sheet and a portion of the glass film to which the protective tape is not applied.

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