TW202019801A - Glass film laminate roll - Google Patents

Abstract

Provided is a glass film laminate roll 1 formed by winding a glass film laminate 3. The glass film laminate 3 comprises a long glass film 4, lead films 5, 6 that are connected to the longitudinal ends of the glass film 4, and a protective film 7 that is bonded to a first main surface 4c of the glass film 4 in order to protect the glass film 4. The protective film 7 juts out farther toward the lead-film 5, 6 side than longitudinal ends 4a, 4b of the glass film 4, and moreover is configured so that the protective film 7 and the longitudinal ends 4a, 4b of the glass film 4 are directly bonded together, and so that the protective film 7 and longitudinal ends 5b, 6a of the lead films 5, 6 are directly bonded together.

Description

Glass film laminate roll

The present invention relates to a glass film laminate roll formed by winding a glass film laminate.

In recent years, in various glass plates typified by glass substrates for flat panel displays such as liquid crystal displays, glass films that have been thinned to a film shape are sometimes used.

Since the glass film is sufficiently thin, it has flexibility and can be wound into a roll shape. Therefore, it may be wound into a roll shape to form a glass roll. Regarding the glass roll, the extracted glass film can be continuously subjected to manufacturing-related treatments such as film formation, end-face processing, and inspection. Therefore, it has an advantage that the manufacturing efficiency is improved compared to a single-piece glass plate.

However, since the glass film is very thin, there is a problem that it is easily broken. Therefore, Patent Document 1 discloses a glass film laminate for the purpose of preventing damage to a glass film. That is, the aforementioned document discloses that in order to connect the end film to the longitudinal end of the glass film, the tape member is adhered to the longitudinal end of the glass film and the longitudinal end of the end film, and supports The membrane adheres to the main surface of the glass membrane. The end film is used to pull the glass film when the glass film is introduced into the roll to roll device to prevent the damage of the glass film (especially the end damage in the longitudinal direction), and the support film is used to protect the main surface of the glass film .

Here, the support film is adhered to the tape member, and adhered to both the glass film and the end film on both sides of the tape member. Therefore, the support film is not directly adhered to the longitudinal end of the glass film and the longitudinal end of the end film. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2013-35158

[Problems to be solved by the invention]

The glass film laminate disclosed in Patent Document 1 is that the tape member and the support film (including the adhesive layer) are superimposed on the longitudinal end of the glass film and the longitudinal end of the end film at a position corresponding to the tape member The status of the layer. Therefore, a large step is formed in the vicinity of the longitudinal end of the glass film (in detail, in the case of the above-mentioned document, a two-step step-like step). Therefore, when the glass film laminate is wound into a roll, or when the glass film laminate wound into a roll is drawn out and transported in a roll-to-roll device, there is Possibility of local bending stress, which may damage the glass film.

An object of the present invention is to suppress damage to the glass film when the glass film laminate is wound into a roll, or when the glass film laminate wound into a roll is extracted and transported in a roll-to-roll device. [Means to solve the problem]

The invention pioneered to solve the above problem is a glass film laminate roll, which is formed by winding a glass film laminate, and the glass film laminate includes: a long glass film; a guide film, Connected to at least one longitudinal end of the glass film; and a protective film, which is adhered to the main surface of the glass film for protecting the glass film, the protective film extends from the longitudinal end of the glass film to the guide film side, the protective film and the glass The longitudinal end of the film is directly adhered, and the protective film is directly adhered to the longitudinal end of the guide film. According to such a configuration, the protective film is directly adhered to the longitudinal ends of the glass film and the guide film. Therefore, there is no unnecessary inclusion such as a tape member between the longitudinal end of the protective film and the glass film and between the longitudinal end of the protective film and the guide film. Therefore, it is possible to reduce the step difference near the end in the longitudinal direction of the glass film or eliminate the step difference itself. As a result, when the glass film laminate is wound into a roll, or when the glass film laminate wound into a roll is drawn out and transported in a roll-to-roll device, it is difficult to align the glass film near the longitudinal end The glass film acts as a local bending stress, thereby suppressing damage to the glass film.

In the above configuration, it is preferable that the length of the portion of the protective film extending from the longitudinal end of the glass film to the guide film side is greater than or equal to the roll circumference of the outermost glass film. In this way, the outermost surface of the outermost glass film can be covered by the two layers including the guide film and the protective film. Therefore, the small step formed between the lengthwise ends of the guide film and the protective film is not likely to directly affect the glass film.

In the above configuration, when the glass film laminate is unfolded on a flat surface, the longitudinal end of the glass film and the longitudinal direction of the guide film may be on the surface opposite to the surface to which the protective film is adhered Both ends of the end are exposed to the outside. In this way, on the surface opposite to the surface to which the protective film is adhered, other members such as a tape member are not adhered to the longitudinal end of the glass film and the longitudinal end of the guide film. Therefore, even in the vicinity of the end in the longitudinal direction of the glass film on the surface opposite to the surface to which the protective film is adhered, the level difference can be substantially eliminated.

In the above configuration, a tape member may be included, and the tape member adheres to the length of the glass film on the surface opposite to the surface to which the protective film is adhered when the glass film laminate is spread on a flat surface Both the end in the direction and the end in the longitudinal direction of the guide film. In this way, the longitudinal end of the glass film and the longitudinal end of the guide film are firmly fixed by the protective film and the tape member from both sides in the thickness direction, so the longitudinal end of the glass film and/or the guide film is not easily inadvertently The protective film is peeled off. Therefore, the adhesive surface of the protective film is not easily exposed to the outside from between the glass film and the guide film, thereby preventing the surrounding environment from being contaminated by the adhesive.

In the above configuration, it is preferable that a gap is formed between the longitudinal end of the glass film and the longitudinal end of the guide film. As such, direct contact between the glass film and the end surface of the guide film is not easy. Therefore, damage to the glass film can be more reliably suppressed. [Effect of invention]

According to the present invention, when the glass film laminate is wound into a roll, or when the glass film laminate wound into a roll is extracted and transported in a roll-to-roll device, damage to the glass film can be reliably suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment) As shown in FIGS. 1 and 2, the glass film laminate roll 1 of the first embodiment includes a cylindrical core 2 and a glass film laminate 3 wound around the core 2 in a roll shape. In addition, for convenience of explanation, the thickness of each structure of the glass film laminate 3 is exaggerated.

The length of the core 2 in the width direction (the length in the direction perpendicular to the longitudinal direction) may be substantially the same as the length of the glass film laminate 3 in the width direction, but in this embodiment, it is larger than the width of the glass film laminate 3 The length of the direction.

The outer diameter of the core 2 is appropriately adjusted according to the relationship with the thickness (flexibility) of the glass film 4, but it is preferably 75 mm to 300 mm, for example.

The material of the core 2 is not particularly limited, and for example, resin, metal, or the like can be used.

In addition, the core 2 is not a necessary configuration of the glass film laminate roll 1, and for example, it may be pulled out after the glass film laminate 3 is wound.

The glass film laminate 3 includes a long glass film 4, a first guide film 5 and a second guide film 6 connected to the front end 4a and the rear end 4b of the glass film 4, respectively, and a glass film 4 for protection And the protective film 7 adhered to the first main surface 4c of the glass film 4. In this embodiment, the first guide film 5 side is the front side, and the second guide film 6 is the rear side.

The glass film 4 has flexibility. The thickness of the glass film 4 is preferably, for example, 5 μm to 300 μm, and more preferably 50 μm to 100 μm.

The glass film 4 is formed by a known forming method such as a float method or a down-draw method. Among them, the glass film 4 is preferably formed by an overflow down-draw method. In this way, the surface of the glass film 4 becomes an unpolished forged surface, and has the advantage of being very smooth.

The length of the glass film 4 in the longitudinal direction (winding direction) is not particularly limited. For example, the length is 100 m to 500 m when it is long, and it may exceed 1000 m when it is longer.

Examples of the composition of the glass film 4 include alkali-free glass, borosilicate glass, soda glass (soda-lime glass), high silica glass, and other oxide-based glasses containing silicon oxide as a main component. . The glass film 4 may also be chemically strengthened glass. In this case, aluminosilicate glass may be used.

From the viewpoint of ensuring the bending strength of the glass film 4, both end surfaces in the width direction of the glass film 4 are preferably laser cut or laser cut surfaces. From the same viewpoint, the surface roughness Ra (according to Japanese Industrial Standards (JIS) B0601:2001) of both end surfaces in the width direction of the glass film 4 is preferably 0.1 μm or less, and more preferably 0.05 μm or less. In addition, the end surface of the front end portion 4a and the end surface of the rear end portion 4b of the glass film 4 may also satisfy the same conditions as the both end surfaces in the width direction of the glass film 4. Here, the laser cutting is a method of cutting the glass film 4 by expanding the initial crack by thermal stress generated by expansion due to the heating action of the laser and contraction due to the cooling action of the refrigerant. In addition, the laser fuse is a method of cutting off a part that is melted by the heating action of the laser by jetting a fluid (for example, gas).

The glass film 4 is used as a glass substrate such as a flat panel display, a solar cell, organic electroluminescence (EL) lighting, a touch panel, and a digital signage.

The first guide film 5 is connected to the front end portion 4 a of the glass film 4, and extends to the front side along the longitudinal direction of the glass film 4. The second guide film 6 is connected to the rear end portion 4b of the glass film 4 and extends rearward along the longitudinal direction of the glass film 4. In addition, the rear end portion 6b of the second guide film 6 is fixed to the core 2 by, for example, a tape member or the like (not shown). Further, the front end portion 5a of the first guide film 5 is fixed to the outermost film by an unshown tape member or the like after winding the glass film laminate 3 (for example, the front end portion 5a of the first guide film 5 And the rear end 5b). Here, the front end portion 4 a and the rear end portion 4 b of the glass film 4 are collectively referred to as the longitudinal end portion of the glass film 4.

The guide film 5 and the guide film 6 do not overlap the longitudinal end of the glass film 4. The rear end portion 5b of the first guide film 5 and the front end portion 4a of the glass film 4 can be arranged with their end faces in contact, but in this embodiment, as shown in FIG. The gaps 8 are formed between the end faces in such a manner that the end faces of the two face each other with a gap therebetween. Similarly, the front end portion 6a of the second guide film 6 and the rear end portion 4b of the glass film 4 can be arranged with their ends facing each other, but a gap is formed between the end surfaces of the two (the illustration is omitted) ), the end faces of the two are spaced apart and face each other. Here, the rear end portion 5b of the first guide film 5 and the front end portion 6a of the second guide film 6 are collectively referred to as the guide film 5 and the longitudinal end portions of the guide film 6.

The interval S of the gap 8 formed between the end surface of the rear end portion 5b of the first guide film 5 and the end surface of the front end portion 4a of the glass film 4 is not particularly limited, and is, for example, 0.05 mm to 3 mm. The interval of the gap formed between the end surface of the front end portion 6a of the second guide film 6 and the end surface of the rear end portion 4b of the glass film 4 is also not particularly limited, but the preferred range is the same as the interval S of the gap 8.

1 and 2 again, the thickness of the guide film 5 and the guide film 6 is not particularly limited, but it is preferably substantially the same as the thickness of the glass film 4. The thickness difference of the guide film 5, the guide film 6, and the glass film 4 is preferably 0.1 mm or less, for example.

The length of the guide film 5 and the guide film 6 in the longitudinal direction is not particularly limited, but the glass film laminate 3 drawn out from the glass film laminate roll 1 is continuously subjected to predetermined manufacturing-related processes (for example, In the case of end surface processing, trimming, end surface inspection, etc.), it is preferably set to be equal to or greater than the total length of the conveyance path of the glass film 4 in the device. In the present embodiment, the length of the guide film 5 and the guide film 6 in the longitudinal direction is greater than the length of the extension 7x and the extension 7y of the protective film 7 described later.

The length of the guide film 5 and the guide film 6 in the width direction is not particularly limited, but it is preferably substantially the same as the length of the glass film 4 in the width direction. The difference between the lengths in the width direction of the guide film 5, the guide film 6 and the glass film 4 is preferably 3 mm or less, for example. As a result, the dimension of the width direction of the glass film layered body 3 is less likely to vary. As a result, when the glass film 4 contained in the glass film laminate 3 extracted from the glass film laminate roll 1 is continuously subjected to a predetermined manufacturing-related process by a roll-to-roll device, the glass film laminate 3 is less likely to meander Serpentine.

The material of the guide film 5 and the guide film 6 is preferably resin. Specifically, examples of the material of the guide film 5 and the guide film 6 include polyethylene (polyethelyne, PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), Polyvinylidene chloride (PVDC), polypropylene (PP), polyvinyl alcohol (PVA), polyester (polybutylene terephthalate, PBT), polycarbonate (PC), polyphenylene Ethylene (polystyrene, PS), polyacrylonitrile (PAN), ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-methacrylic acid copolymer, polyamide, cellophane, silicon Ketone resin, etc. Among them, the guide film 5 and the guide film 6 are preferably PET films.

The protective film 7 protrudes from the front end portion 4a of the glass film 4 to the front side, and protrudes from the rear end portion 4b of the glass film 4 to the rear side. The protective film 7 is directly adhered to the first main surface 4c of the glass film 4. Furthermore, the protrusion 7x on the front side of the protective film 7 is directly adhered to the first guide film 5, and the protrusion 7y on the rear side of the protective film 7 is directly adhered to the second guide film 6. Here, the directly adhered state refers to a state where only the adhesive layer of the protective film 7 is interposed between the base material of the protective film 7 and the glass film 4 (or the guide film 5 and the guide film 6). In other words, the protective film 7 connects the glass film 4 and the first guide film 5 and connects the glass film 4 and the second guide film 6. Thereby, there are no other inclusions such as tape members between the vicinity of the longitudinal end of the glass film 4 on the first main surface 4c side of the glass film 4 and the protective film 7. Therefore, it is possible to reduce the step difference near the end in the longitudinal direction of the glass film 4 on the side of the first main surface 4c of the glass film 4, or to eliminate the step difference itself. As a result, when the glass film laminate 3 is wound, or when the wound glass film laminate 3 is extracted and transported in a roll-to-roll device, the glass film 4 is less likely to act on the glass film 4 in the vicinity of the end in the longitudinal direction. The local bending stress can suppress the breakage of the glass film 4. In addition, in FIG. 1, the lengths of the extended portions 7x and 7y of the protective film 7 in the longitudinal direction are sufficiently long, and the longitudinal direction of the glass film 4 on the side of the first main surface 4c of the glass film 4 is shown. There is no step difference near the end.

The lengths of the extension 7x and the extension 7y of the protective film 7 in the longitudinal direction are not particularly limited, but the outer circumference of the outermost glass film 4 in a state where the glass film laminate 3 is wound is preferred (one week) the above. In this way, the outer peripheral surface of the outermost glass film 4 and the inner peripheral surface of the innermost glass film can be reliably covered by the two layers including the guide film 5 and the protective film 7. Therefore, the small step difference caused by the thickness difference formed between the front end portion 7a of the protective film 7 and the first guide film 5 and between the rear end portion 7b of the protective film 7 and the second guide film 6 is also not easy to directly Affect the glass film 4.

Here, as with the overhang 7x of the protective film 7 on the outer diameter side, the length in the longitudinal direction of the overhang 7y on the inner diameter side is also set to the outermost layer in a state where the glass film laminate 3 is wound The perimeter of the glass film 4 is longer than that. The reason for this is that each time the roll-to-roll device is processed by the roll, the direction of the starting end portion in the winding direction is switched, and the overhang portion 7y may be closer to the outer diameter side than the overhang portion 7x. In addition, when it is not necessary to wind the glass film laminate 3 again, such as when the glass film laminate 3 drawn from the glass film laminate roll 1 is cut every predetermined length, the overhang 7y on the inner diameter side The length in the longitudinal direction is set to be equal to or greater than the roll circumference of the innermost glass film 4 in a state where the glass film laminate 3 is wound.

In this embodiment, on the second main surface 4d side of the glass film 4, both the front end portion 4a of the glass film 4 and the rear end portion 5b of the first guide film 5 are exposed to the outside, and the rear end portion 4b of the glass film 4 Both the front end portion 6a of the second guide film 6 are exposed to the outside. Thereby, even in the vicinity of the end in the longitudinal direction of the second main surface 4d side of the glass film 4, there is no state where there is no step caused by the tape member or the like.

The thickness of the protective film 7 is not particularly limited as long as the glass film laminate 3 is made flexible, but from the viewpoint of making the flexibility good, it is preferably thin. The thickness of the base material of the protective film 7 is preferably, for example, 5 μm to 200 μm, and more preferably 10 μm to 100 μm. The thickness of the adhesive layer of the protective film 7 is preferably 0.1 μm to 100 μm, and more preferably 2 μm to 20 μm.

The length of the protective film 7 in the width direction is not particularly limited, and in this embodiment, it is smaller than the glass film 4. That is, the glass film 4 protrudes from both sides of the protective film 7 in the width direction. Thereby, with the protective film 7 adhered to the glass film 4, a predetermined process can be continuously performed on the end in the width direction of the glass film 4 by the roll-to-roll device. The length of the protective film 7 in the width direction may be the same as the length of the glass film 4 in the width direction, or may be greater than the length of the glass film 4 in the width direction.

The material of the base material of the protective film 7 is preferably resin. Specifically, as the material of the base material of the protective film 7, the same materials as exemplified in the guide film 5 and the guide film 6 can be selected. Among them, the base material of the protective film 7 is preferably a PET film.

As the adhesive layer of the protective film 7, for example, an optically transparent adhesive sheet (Optically Clear Adhesive, OCA), a pressure-sensitive adhesive sheet (Pressure Sensitive Adhesive, PSA), or the like can be used. As the adhesive component of the adhesive layer, acrylic adhesives, silicon adhesives, epoxy adhesives, photo-curable adhesives (such as ultraviolet-curable adhesives), etc. can be used.

The adhesive layer of the protective film 7 is preferably slightly adhesive. With this, the protective film 7 can be easily peeled from the glass film 4. Here, "micro-adhesion" refers to an adhesive force (peel strength) measured by a 180° peel strength test (according to JIS Z 0237:2009) of 0.01 N/25 mm to 1 N/25 mm.

In addition, the glass film laminate 3 may be wound around the core 2 with the protective film 7 side inside, but in this embodiment, as shown in FIG. 1, the glass film laminate 3 has the protective film 7 side outside Instead, it is wound around the core 2.

Furthermore, when the length of the protective film 7 in the width direction is greater than the length of the glass film 4 in the width direction, as shown in FIG. 4, the width of the guide film 5 and the guide film 6 in the width direction may also be greater than the glass film 4 Length in the width direction. In the drawing, the length of the guide film 5 and the guide film 6 in the width direction is greater than the length of the glass film 4 in the width direction, and is substantially the same as the length of the protective film 7 in the width direction.

(Second embodiment) As shown in FIG. 5, the glass film laminate roll 1 of the second embodiment differs from the glass film laminate roll 1 of the first embodiment in that the second main surface 4d side of the glass film 4 is adhered to On the surface opposite to the surface of the protective film 7, the first tape member 21 is adhered so as to span both the front end portion 4 a of the glass film 4 and the rear end portion 5 b of the first guide film 5, and spans the glass The second tape member 22 is adhered to both the rear end portion 4b of the film 4 and the front end portion 6a of the second guide film 6. In addition, other common configurations are denoted by the same symbols and detailed descriptions are omitted.

The front end portion 4a of the glass film 4 and the rear end portion 5b of the first guide film 5 are firmly fixed by the protective film 7 and the first tape member 21 from both sides in the thickness direction. Similarly, the rear end portion 4b of the glass film 4 and the front end portion 6a of the second guide film 6 are firmly fixed by the protective film 7 and the second tape member 22 from both sides in the thickness direction. Therefore, the longitudinal ends of the glass film 4 and/or the guide film 5 and the guide film 6 are less likely to be inadvertently peeled off from the protective film 7. Therefore, the adhesive surface of the protective film 7 is not easily exposed to the outside, so that the surrounding environment can be prevented from being contaminated by the adhesive on the adhesive surface. In particular, this effect is useful when the glass film laminate 3 is wound around the conveying roller of the roll-to-roll device so that the second main surface 4d side of the glass film 4 is the outside (convex side).

The thickness of the tape member 21 and the tape member 22 is not particularly limited as long as it has flexibility, but it is preferably thin from the viewpoint of reducing the step difference near the longitudinal end of the glass film 4. The thickness of the base materials of the tape member 21 and the tape member 22 is preferably, for example, 5 μm to 200 μm, and more preferably 10 μm to 100 μm. The thickness of the adhesive layer of the tape member 21 and the tape member 22 is, for example, preferably 0.1 μm to 100 μm, and more preferably 0.2 μm to 20 μm.

The length of the tape member 21 and the tape member 22 in the longitudinal direction is not particularly limited, and in this embodiment, the adhesion range of the tape member 21 and the tape member 22 is defined as the length near the longitudinal end of the glass film 4.

The length of the tape member 21 and the tape member 22 in the width direction is not particularly limited, and it is preferably adhered to the entire width of the glass film 4. Ideally, in order to prevent the tape member 21 and the tape member 22 from exceeding the width of the glass film 4, the width direction length of the tape member 21 and the tape member 22 is provided to be slightly shorter than the total width of the glass film 4. The length of the tape member 21 and the tape member 22 in the width direction is greater than the length of the tape member 21 and the tape member 22 in the longitudinal direction.

The material of the base materials of the tape member 21 and the tape member 22 is preferably a resin film. Specifically, as the materials of the base materials of the tape member 21 and the tape member 22, the same materials as exemplified in the guide film 5 and the guide film 6 can be selected. Among them, the base materials of the tape member 21 and the tape member 22 are preferably PET films.

As the adhesive layer of the adhesive tape member 21 and the adhesive tape member 22, the same material as illustrated in the adhesive layer of the protective film 7 can be selected. In addition, the adhesive force of the adhesive layers of the tape member 21 and the adhesive tape member 22 may be substantially the same as the adhesive force of the adhesive layer of the protective film 7, but in this embodiment, the adhesive force of the adhesive layer of the protective film 7 is stronger.

The present invention is not limited at all by the above-described embodiments, and can be implemented in various forms without departing from the gist of the present invention.

In the above-mentioned embodiment, the case where only the glass film laminate 3 is wound around the core 2 has been described. However, an interlayer film (not shown) that does not have an adhesive layer such as a backing paper may be peelable. Superimposed on the glass film laminate 3 in a manner, and winding them around the core 2 together. The interlayer film preferably overlaps the second main surface 4d of the glass film 4. In addition, the interlayer film may overlap the first main surface 4c side of the glass film 4, that is, the protective film 7.

In the above embodiment, the portion corresponding to the front end portion 4a of the glass film 4 and the rear end portion 5b of the first guide film 5 and the rear end portion 4b and the second guide film 6 corresponding to the glass film 4 may also be used. In the portion of the front end portion 6a, the adhesion of the protective film 7 is locally increased compared to other portions. In this way, the longitudinal ends of the glass film 4 and/or the guide film 5 and the guide film 6 are less likely to be inadvertently peeled off from the protective film 7.

In the above embodiment, the case where the guide film 5 and the guide film 6 are connected to the front end portion 4a and the rear end portion 4b of the glass film 4, respectively, but only the front end portion 4a and the rear end portion of the glass film 4 Any one of 4b is connected to the guide membrane.

1: glass film laminate volume 2: core 3: Glass film laminate 4: Glass film 4a: front end of glass film 4b: the rear end of the glass film 4c: the first main surface of the glass film 4d: the second main surface of the glass film 5: First guide film 5a: front end of the first guide film 5b: the rear end of the first guide film 6: Second guide film 6a: front end of the second guide film 6b: the rear end of the second guide film 7: Protective film 7a: front end of protective film 7b: the rear end of the protective film 7x, 7y: the extension of the protective film 8: clearance 21: The first tape member 22: Second tape member S: interval X: area

FIG. 1 is a side view showing a roll of a glass film laminate according to the first embodiment, and shows a state where the glass film laminate is spread on a plane. FIG. 2 is a bottom view of FIG. 1 (view from the protective film side). FIG. 3 is an enlarged view of the X region in FIG. 1. 4 is a partial bottom view (a view from the protective film side) showing a modified example of the glass film laminate roll of the first embodiment, showing a state where the glass film laminate is unfolded on a plane. 5 is a side view showing a roll of a glass film laminate according to a second embodiment, showing a state where the glass film laminate is unfolded on a plane.

1: glass film laminate volume

2: core

3: Glass film laminate

4: Glass film

4a: front end of glass film

4b: the rear end of the glass film

4c: the first main surface of the glass film

4d: the second main surface of the glass film

5: First guide film

5a: front end of the first guide film

5b: the rear end of the first guide film

6: Second guide film

6a: front end of the second guide film

6b: the rear end of the second guide film

7: Protective film

7a: front end of protective film

7b: the rear end of the protective film

7x, 7y: the extension of the protective film

X: area

Claims (5)

A glass film laminate roll characterized by being formed by winding a glass film laminate, and The glass film laminate includes: a long glass film; a guide film connected to at least one longitudinal end of the glass film; and a protective film that is adhered to the main glass film to protect the glass film surface, The protective film extends from the longitudinal end of the glass film to the guide film side, The protective film is directly adhered to the longitudinal end of the glass film, and the protective film is directly adhered to the longitudinal end of the guide film. The glass film laminate roll according to item 1 of the patent application range, wherein the length of the protective film in which the length of the portion protruding from the longitudinal end of the glass film toward the guide film side is the longest The outer circumference of the glass film has a roll circumference or more. The glass film laminate roll as described in item 1 or item 2 of the patent application scope, wherein when the glass film laminate is unfolded on a flat surface, on the side opposite to the surface to which the protective film is adhered In the surface, both the longitudinal end of the glass film and the longitudinal end of the guide film are exposed to the outside. The glass film laminate roll according to item 1 or item 2 of the scope of the patent application includes an adhesive tape member, and when the glass film laminate is unfolded on a flat surface, there is The surface opposite to the surface of the protective film is adhered to both the longitudinal end of the glass film and the longitudinal end of the guide film. The glass film laminate roll according to any one of claims 1 to 4, wherein a gap is formed between the longitudinal end of the glass film and the longitudinal end of the guide film .

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