TW201703886A - Method for manufacturing glass film - Google Patents

Abstract

Provided is a method for manufacturing glass film comprising: a washing step, wherein a strip-shaped glass film G is conveyed in a flat orientation through a washing area R1 on the conveyance route, where the strip-shaped glass film G is washed using a washing fluid L; and a fluid removal step, wherein the strip-shaped glass film G is conveyed in a flat orientation through a fluid removal area R2 on the conveyance route, where a gas A is blown onto the washed strip-shaped glass film G in order to remove any washing fluid L that has adhered during the washing step. The gas A is blown onto the top surface Ga of the strip-shaped glass film G over the entire width, such that the pressure prevents any washing fluid L that has adhered to the top surface Ga from being transported downstream, and thus forming a fluid reservoir LL on the top surface Ga. As a result, a portion Gc passing through the fluid reservoir LL formed on the strip-shaped glass film G can more easily advance straight forward in the original direction of conveyance, thus preventing the portion Gc, and, by extension, the strip-shaped glass film G, from shifting obliquely away from the original direction of conveyance.

Description

Glass film manufacturing method

The present invention relates to a method for producing a glass film, comprising: a washing step of washing a belt-shaped glass film while being washed by a washing liquid; and a liquid-cutting step by spraying the strip-shaped glass film after washing The gas is used to remove the washing liquid adhered to the strip-shaped glass film in the washing step.

As is well known, glass substrates used in flat panel displays (FPDs) such as liquid crystal displays, plasma displays, and organic EL displays continue to promote thinning as the demand for weight reduction increases. Further, in response to the above-described demand, a glass film having a thickness of 300 μm or less or 200 μm or less has been developed and manufactured to be thinned.

The step of producing the glass film includes a washing step of washing the strip-shaped glass film as a raw material of the glass film while being washed by a cleaning liquid (for example, water); and a liquid-cutting step by The washed strip-shaped glass film ejects a gas (for example, air) to remove the washing liquid adhering to the strip-shaped glass film in the washing step. The strip-shaped glass film after the liquid-breaking step is, for example, wound into a roll shape to be stored in a glass roll.

Here, although not used to wash the strip glass film The procedure of the step and the liquid-breaking step is disclosed in Patent Document 1 as an example of a method for performing a washing step and a liquid-cutting step on a glass substrate that has been cut into pieces.

In the general cleaning method of the glass substrate, the cleaning step is performed by spraying the cleaning liquid onto the glass substrate from the cleaning nozzle on the upstream side of the conveyance path of the glass substrate. Then, as shown in FIG. 7 , the first air knife 100 and the second air knife 101 respectively eject the gas A from the glass substrate GP transported in the transport direction T on the downstream side of the transport path of the glass substrate GP. The liquid breaking step.

The first air knife 100 and the second air knife 101 collectively inject the gas A toward the upstream side of the conveyance path of the glass substrate GP. Further, when the two air knives 100 and 101 view the glass substrate GP in a plan view, the gas A is ejected in a direction inclined with respect to the conveyance direction T of the glass substrate GP.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] JP-A-2014-38914

However, when the above-described method is applied to the washing step of the strip-shaped glass film and the liquid-cutting step, the following problems must be solved.

That is, when the same method is applied to the washing step of the strip-shaped glass film and the liquid-cutting step, as shown in Fig. 8, the pressure of the gas A ejected from the two air knives 100, 101, respectively, is broken. The strip-shaped glass film G in the liquid step is subjected to a load in one of the width directions orthogonal to the conveyance direction T (the leeward side as the gas A in the width direction). Here, since the strip-shaped glass film G is extremely thin, the weight per unit length is extremely light. Therefore, the belt-shaped glass film G subjected to the load is inclined from the original conveyance direction (transport direction T), and the belt-shaped glass film G is twisted. In addition, the stress acting on the strip-shaped glass film G due to the distortion may cause damage to the strip-shaped glass film G.

Further, even when the strip-shaped glass film is not damaged, for example, when a glass ribbon is wound around the winding core after the liquid-breaking step, a glass reel is produced, and the following occurs. General problem. In other words, the strip-shaped glass film G in the liquid-cutting step is inclined from the original conveying direction, and the layers of the strip-shaped glass film G which are recombined in the glass roll are oriented in the width direction (core winding). The deviation of the axial direction may cause the fabricated glass reel to be in an inconvenient state of being stored.

The present invention has been developed in view of the above circumstances, and a technical problem is that, after the step of washing the strip-shaped glass film, the strip-shaped glass film is prevented from being inclined from the original transport direction when the liquid-cutting step is performed.

The present invention developed in order to solve the above problems The method for producing a glass film includes a cleaning step of transporting a flexible strip-shaped glass film in a flat posture along a longitudinal direction, and a cleaning liquid disposed in a washing area disposed in the conveyance path The strip-shaped glass film is washed; and the liquid-cutting step is performed by injecting gas toward the strip-shaped glass film in the liquid-cutting region disposed on the downstream side of the transport path from the cleaning region, thereby being The strip-shaped glass film carried out toward the downstream side removes the washing liquid adhered to the washing step, and is characterized in that a gas is sprayed toward the upper surface of the strip-shaped glass film, and the washing liquid adhering to the upper surface is blocked by the pressure. The liquid is transferred from the liquid-breaking area toward the downstream side, whereby an effusion composed of a washing liquid is formed on the upper surface. Here, the "flat posture" means a case where the strip-shaped glass film is in a parallel posture with respect to the horizontal plane, or the strip-shaped glass film is inclined in a range of 10 or less with respect to the horizontal plane. .

According to the above method, the cleaning liquid which is transferred to the liquid-cutting region in a state of being attached to the upper surface of the strip-shaped glass film is blocked in the liquid-breaking region by the pressure of the gas ejected from the upper surface toward the downstream side. Transfer. Further, by stopping the cleaning liquid continuously transferred from the upstream side each time, liquid accumulation is formed on the upper surface of the strip-shaped glass film. This liquid is formed in a state of being stopped in the liquid-cut region by the pressure from the gas, and the strip-shaped glass film sequentially passes the liquid from the upstream side to the downstream side. Further, the portion of the strip-shaped glass film that passes through the effusion (hereinafter referred to as the effusion passage portion) only increases the amount of the liquid formed on the upper surface, that is, the weight of the portion. By this weight, the effusion passage portion can be easily advanced in the original conveying direction, and the slanting of the portion can be avoided. As a result, when the liquid cutting step performed in the liquid-cutting region is performed, the band-shaped glass can be prevented. The glass film will be inclined from the original conveying direction.

In the above method, the plurality of transport members arranged along the transport path are transported while supporting the lower surface of the strip-shaped glass film in the liquid-cut region, and the cleaning liquid is blocked between the plurality of transport members. It is better to form a effusion.

As described above, since the lower surface of the plurality of conveying members does not exist between the plurality of conveying members, the cleaning liquid is blocked at the position to form the liquid, and the liquid passing portion is formed on the upper surface. The effusion on the upper side is deflected downward. Then, the effusion passage portion is deflected downward, and the upper surface of the effusion passage portion is deformed into a concave curved surface where liquid accumulation is likely to occur. Thereby, it is possible to stably maintain the formation of the effluent, and it is possible to more appropriately prevent the strip-shaped glass film from being inclined from the original transport direction.

In the above method, it is preferable to inject the gas toward the upstream side of the conveyance path.

As described above, it is easy to cause the pressure from the gas to act on the cleaning liquid adhering to the upper surface of the strip-shaped glass film. Thereby, the cleaning liquid adhering to the upper surface can be more stably blocked from being transferred from the liquid-cutting region to the downstream side, and the liquid accumulation can be more easily formed. As a result, it is possible to more appropriately prevent the strip-shaped glass film from being inclined from the original transport direction.

In the above method, it is preferred to remove the cleaning liquid adhering to the cleaning step from the lower surface by spraying a gas toward the lower surface of the strip-shaped glass film in the liquid-breaking region.

As described above, the following table can be appropriately cut from the strip glass film Remove the cleaning solution from the surface.

In the above method, it is preferred that the gas ejected toward the upper surface of the strip-shaped glass film and the gas ejected toward the lower surface are directed to the same portion in the longitudinal direction of the strip-shaped glass film.

The gas ejected toward the upper surface (hereinafter referred to as the upper surface side gas) and the gas ejected toward the lower surface (hereinafter referred to as the lower surface side gas) are directed to the different portions in the longitudinal direction of the strip-shaped glass film. In the case of injection, there are problems such as the following. In other words, the portion of the upper surface side gas and the lower surface side gas which are ejected by the upper surface side gas may cause an external force acting on the strip-shaped glass film due to the pressure from the gas, which may cause the strip-shaped glass film to wobble. Further, there is a risk that the belt-shaped glass film will be inclined from the original conveying direction due to shaking. However, as long as the upper surface side gas and the lower surface side gas are directed to the same portion in the longitudinal direction of the strip-shaped glass film, the following excellent effects and effects can be obtained. In other words, the external force acting on the strip-shaped glass film from the pressure of the gas on the upper surface side and the thickness-direction components of the external force acting on the external force of the strip-shaped glass film due to the pressure from the gas on the lower surface side are mutually eliminated. This result can suppress the magnitude of the thickness direction component of the resultant force of the two external forces. Thereby, it is possible to surely avoid the occurrence of wobble in the strip-shaped glass film, and the wrap of the strip-shaped glass film from the original transport direction is caused by the shaking.

In the above method, a strip-shaped sheet which is continuous with the strip-shaped glass film is used, and the last portion in the longitudinal direction of the strip-shaped glass film and the head portion in the longitudinal direction of the strip-shaped sheet are straddled in two portions. The sheet-like connecting members are connected, and are provided in the sheet-like connecting member: It is preferable that the wide portion that is attached to the two portions and the narrow portion that extends between the imaginary straight lines along the center in the width direction of the two portions and that are interposed between the two wide portions are preferable.

As described above, the last portion in the longitudinal direction of the strip-shaped glass film and the head portion in the longitudinal direction of the strip-shaped sheet are joined via the sheet-like connecting member, whereby the strip-shaped glass film is pulled to take the form of the strip-shaped sheet. . Further, since the narrow portion provided in the sheet-like connecting member extends along an imaginary straight line connecting the centers of the two portions (the last portion of the strip-shaped glass film and the front portion of the strip-shaped sheet) in the width direction, The last portion of the strip-shaped glass film to which the wide portion of the sheet-like connecting member is attached is formed in a state in which the tension is applied in the vicinity of the center in the width direction (the tension generated by the pulling of the strip-shaped sheet). Therefore, in the last portion of the strip-shaped glass film, the outer side in the width direction which is in a relaxed state in the vicinity of the center in the width direction in the stretched state is formed to hang down downward. In this way, when the liquid is accumulated in the last portion of the strip-shaped glass film, the cleaning liquid constituting the liquid can be induced to the outside in the width direction of the sagging, and the cleaning can be appropriately performed from the upper surface of the glass film. Liquid removal.

In the above method, the winding step includes winding a strip-shaped glass film around the winding core on the downstream side of the conveyance path from the liquid-breaking region to form a glass roll.

As described above, since the strip-shaped glass film is prevented from being inclined from the original transport direction in the liquid-breaking step, the re-composited roll can be avoided in the glass reel produced by winding the strip-shaped glass film in a roll shape. The layers of the tubular strip-shaped glass film are oriented toward each other in the width direction (the axis of the core) Deviation from).

According to the present invention, after the step of washing the strip-shaped glass film, it is possible to prevent the strip-shaped glass film from being inclined from the original transport direction when the liquid-cutting step is performed.

1‧‧‧core

2‧‧‧Sheet joint members

2a‧‧‧ wide section

2b‧‧‧imaginary straight line

2c‧‧‧Narrow section

3‧‧‧Striped flakes

3f‧‧‧The first part

9‧‧‧Roller

A‧‧‧ gas

G‧‧‧Striped glass film

Ga‧‧‧ upper surface

Gb‧‧‧ lower surface

The last part of Ge‧‧‧

GR‧‧‧ glass reel

L‧‧‧ cleaning solution

LL‧‧ effluent

R1‧‧‧Clean area

R2‧‧‧Shipping area

Fig. 1 is a side view showing a method of producing a glass film according to an embodiment of the present invention.

Fig. 2 is a plan view showing a sheet-like connecting member used in the method for producing a glass film according to the embodiment of the present invention.

Fig. 3 is a plan view showing a method of producing a glass film according to an embodiment of the present invention.

Fig. 4 is a front view showing a method of producing a glass film according to an embodiment of the present invention.

Fig. 5 is a plan view showing a modification of the method for producing a glass film according to the embodiment of the present invention.

Fig. 6 is a plan view showing a modification of the method for producing a glass film according to the embodiment of the present invention.

Fig. 7 is a plan view showing a method of manufacturing a glass substrate of the prior art.

Figure 8 is a plan view showing a method of manufacturing a glass film of the prior art. Figure.

Hereinafter, a method for producing a glass film according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in Fig. 1, a method for producing a glass film according to an embodiment of the present invention includes a cleaning step of transporting a flexible strip-shaped glass film G in a flat posture along the longitudinal direction. The strip-shaped glass film G is washed by the cleaning liquid L in the cleaning region R1 disposed in the conveyance path, and the liquid-breaking step is disposed on the downstream side of the conveyance path by the cleaning region R1. In the liquid-breaking region R2, the gas A is ejected toward the strip-shaped glass film G, and the cleaning liquid L adhered to the cleaning step is removed from the strip-shaped glass film G carried out from the liquid-cut region R2 to the downstream side; and the winding step is performed. The glass ribbon G is wound around the winding core 1 in a roll shape on the downstream side of the conveyance path from the liquid-breaking region R2 to form a glass reel GR. In the method of producing the glass film, the strip-shaped glass film G during transport is connected in series to the strip-shaped sheet 3 that is continuous with the strip-shaped glass film G via the sheet-like connecting member 2 .

First, the strip-shaped glass film G, the strip-shaped sheet 3, and the sheet-like connecting member 2 used in the present embodiment will be described.

The strip-shaped glass film G is formed into a long strip in one direction, and is formed into a thickness (for example, 300 μm or less) capable of imparting flexibility to a roll shape. The strip-shaped glass film G can be formed by various forming methods, wherein the overflow down-draw method, the flow-down method, and the The pull-down method represented by Rafa et al.

Similarly to the strip-shaped glass film G, the strip-shaped sheet 3 is formed into a long strip in one direction, and is formed into a thickness capable of imparting flexibility to a roll shape. As the material of the strip-shaped sheet 3, for example, a resin such as PET can be used.

The sheet-like connecting member 2 can be configured by, for example, a resin such as PET. As shown in Fig. 2, the sheet-like connecting member 2 is connected to the last portion Ge in the longitudinal direction of the strip-shaped glass film G (the portion which is the most end portion of the strip-shaped glass film G during transport), and the strip shape. In the longitudinal direction of the sheet 3, between the two portions Ge and 3f of the head portion 3f (the portion which is the front portion of the strip-shaped sheet 3 during conveyance). The sheet-like connecting member 2 is provided so as to be attached to the wide portion 2a of the two portions Ge and 3f, and to an imaginary straight line 2b extending along the center in the width direction of the two portions Ge and 3f, and between the two wide portions. The narrow portion 2c of each other between 2a. The two wide portions 2a are attached to the last portion Ge of the strip-shaped glass film G and the front portion 3f of the strip-shaped sheet 3, respectively, by the adhesive tape 4.

Next, a specific aspect of the method for producing a glass film disclosed in the embodiment of the present invention will be described.

As shown in Fig. 1, in the washing step, the strip-shaped glass film G conveyed to the cleaning and cleaning region R1 by the conveyor belt 5 in a flat posture is sprayed toward the upper and lower surfaces Ga and Gb, respectively. Liquid L. The cleaning liquid L is ejected from the cleaning liquid ejector 6 that sandwiches the strip-shaped glass film G in the thickness direction and is disposed on the upper surface Ga side and the lower surface Gb side, respectively. a cleaning liquid ejector 6 disposed on the upper surface Ga side, and disposed on the lower surface Both of the cleaning liquid ejectors 6 on the Gb side are sprayed with the cleaning liquid L at the same portion in the longitudinal direction of the strip-shaped glass film G. Further, the cleaning liquid L sprayed toward the upper and lower surfaces Ga and Gb is sprayed to the full width of the strip-shaped glass film G. Here, as the cleaning liquid L, for example, water or the like can be used.

The strip-shaped glass film G which has been subjected to the above-described cleaning step is carried out from the cleaning region R1 toward the downstream side in a state in which the cleaning liquid L adheres to the upper and lower surfaces Ga and Gb.

As shown in Fig. 1 and Fig. 3, in the liquid-breaking step, the full-width injection gas A (hereinafter referred to as the upper surface side gas A) of the upper surface Ga of the strip-shaped glass film G subjected to the washing step is described. . In addition, the pressure from the upper surface side gas A after the ejection is blocked as shown by the hollow arrow in FIG. 3, and is prevented from adhering to the upper surface Ga of the strip-shaped glass film G. The cleaning liquid L of the liquid region R2 is further transferred from the liquid-cut region R2 toward the downstream side. Thereby, the liquid LL composed of the cleaning liquid L is formed on the upper surface Ga of the strip-shaped glass film G. In the same step, the gas A (hereinafter referred to as the lower surface side gas A) is also ejected toward the lower surface Gb of the strip-shaped glass film G in the liquid-cut region R2 to adhere to the strip-shaped glass film. The cleaning liquid L of the lower surface Gb of G is removed.

Both the upper surface side gas A and the lower surface side gas A are sprayed toward the upstream side of the conveyance path of the strip-shaped glass film G and directed to the same portion in the longitudinal direction of the strip-shaped glass film G. The upper surface side gas A and the lower surface side gas A are ejected from the air knives 7 and 8 which are disposed on the upper surface Ga side and the lower surface Gb side, respectively, by sandwiching the strip-shaped glass film G in the thickness direction. The two air knives 7, 8 respectively match the long side direction of the plane in the plane view It is placed in parallel with the width direction of the strip-shaped glass film G. Further, the air knife 7 (8) is formed with a plurality of ejection ports on the upper surface side gas A (lower surface side gas A) along the longitudinal direction thereof, and is ejected from the respective ejection ports by the equal pressure. Surface side gas A (lower side gas A). Here, as the upper surface side gas A (lower surface side gas A), for example, compressed air can be used.

The strip-shaped glass film G in the liquid-breaking region R2 is transported while supporting the lower surface Gb by the rollers 9 as a plurality of transport members arranged along the transport path. The distance D between adjacent rollers 9 from each other is, for example, 300 mm. The adjacent rollers 9 are mutually displaced to block the transfer of the cleaning liquid L adhering to the upper surface Ga to form the fluid LL. Here, in the present embodiment, the liquid pool LL is formed on the upstream side of the conveyance path of the belt-shaped glass film G with reference to the air knife 7. The effusion LL is formed in a state of being stopped in the liquid-cut region R2 by the pressure from the upper surface side gas A, and the strip-shaped glass film G sequentially passes through the effluent LL from the upstream side toward the downstream side. The portion Gc (hereinafter, referred to as the effusion passage portion Gc) in the effusion LL of the strip-shaped glass film G is deflected downward by the weight of the effusion LL formed on the upper surface Ga. Then, along with the occurrence of the deflection, the upper surface Ga of the effusion passage portion Gc is deformed into a concave curved surface where the fluid LL is easily formed.

Here, in order to prevent the weight of the effluent LL formed on the upper surface Ga of the strip-shaped glass film G, the strip-shaped glass film G may be detached from the plurality of rollers 9, or the strip-shaped glass film G may be damaged. , so the effusion LL is made to have a width dimension of the width of the strip-shaped glass film G It is preferably 50% to 100% of the length for the reference, and more preferably 50% to 90% of the length. Further, the lysate LL is preferably formed to have a depth of 1 mm to 10 mm, more preferably 3 mm to 5 mm. In addition, a part of the cleaning liquid L constituting the effusion LL may flow out from both end portions in the width direction of the strip-shaped glass film G.

When the last portion Ge of the strip-shaped glass film G passes through the liquid LL, the cleaning liquid L constituting the effusion LL is removed from the upper surface Ga of the strip-shaped glass film G. Specifically, as shown in FIG. 4, the final portion Ge of the strip-shaped glass film G is formed in a state in which the outer side in the width direction is sagged downward in the vicinity of the width direction center Gec. As a result, when the last portion Ge of the strip-shaped glass film G passes, the cleaning liquid L constituting the fluid LL is induced outward in the width direction of the sagging, and is removed from the upper surface Ga and removed.

In the present embodiment, the upper surface side gas A ejected from the air knife 7 is ejected toward the upstream side of the conveyance path of the strip-shaped glass film G, but the invention is not limited to the above. In a modified example, the cleaning liquid L adhering to the upper surface Ga by the pressure from the upper surface side gas A can be transported toward the downstream side, and the upper surface side can be ejected from the air knife 7 toward the lower side. The state of the gas A is a state in which the upper surface side gas A is ejected toward the downstream side of the conveyance path of the strip-shaped glass film G. Further, the effusion LL may be formed at any position in the liquid-cut region R2, or the effusion LL may be formed directly under the air knife 7 as a modification. In the present embodiment, the upper surface side gas A and the lower surface side gas A are directed to the longitudinal direction of the strip-shaped glass film G. The same portion is sprayed, but as a modification, it may be a state in which it is sprayed at a different portion.

Further, in the present embodiment, the injection ports formed on the plurality of upper surface side gas A (lower surface side gas A) of the air knife 7 (8) are sprayed with the upper surface side gas A by equal pressure (the lower surface side gas) A), but not limited to this. As a modification, as shown in Fig. 5, the air knife 7 can be used as an injection port for ejecting the upper surface side gas A toward the outer side in the width direction of the strip-shaped glass film G, and the higher surface pressure is used to eject the upper surface side gas. The aspect of A. Further, in the present embodiment, the two air knives 7 and 8 are arranged in a plane view in a longitudinal direction thereof in a direction parallel to the width direction of the strip-shaped glass film G, but are not limited thereto. As a modification, the air knife 7 may be divided into two, and as shown in Fig. 6, the air knifes 7a and 7b may be disposed such that the longitudinal direction of each of the divided air knifes 7a and 7b is opposite to the belt. The width direction of the glass film G is inclined.

The strip-shaped glass film G which has passed through the above-described liquid-breaking step is carried out from the liquid-breaking region R2 toward the downstream side in a state where the cleaning liquid L is removed from the upper and lower surfaces Ga and Gb.

As shown in Fig. 1, in the winding step, in a state in which the strip-shaped glass film G after the step of cutting the liquid and the protective sheet S for protecting the upper and lower surfaces Ga and Gb of the strip-shaped glass film G are overlapped, The glass reel GR is produced by winding it around the winding core 1 in a cylindrical shape. The protective sheet S is sequentially wound from the sheet roll SR obtained by winding the protective sheet S in a cylindrical shape and supplied.

By passing the strip glass film G through the above washing step, The liquid breaking step and the winding step are used to complete the method for producing the glass film disclosed in the present embodiment.

Next, the action and effect achieved by the method for producing a glass film according to the present embodiment will be described.

According to the method for producing a glass film according to the present embodiment, the amount of the liquid LL formed on the upper surface Ga is increased by stopping the liquid passage portion Gc of the liquid LL in the liquid-cut region R2. That is its weight. Further, since the accumulated liquid passage portion Gc is easily advanced in the original conveyance direction by the weight, it is possible to avoid the oblique passage of the liquid accumulation passage portion Gc. As a result, when the liquid-cutting step performed in the liquid-cut region R2 is performed, it is possible to prevent the strip-shaped glass film G from being inclined from the original transport direction.

Here, the method for producing the glass film disclosed in the present invention is not limited to the embodiment described in the above embodiment. In the above embodiment, the strip-shaped glass film in the liquid-cut region is transported by a plurality of transport members arranged along the transport path, and an adjacent liquid is formed between the adjacent rollers, but Limited to this. For example, the strip-shaped glass film in the liquid-breaking region may be transported by a pair of transport belts that support both end portions in the width direction from the lower surface side, and between the two conveyor belts (all of them are not A portion that supports any one of a pair of conveyor belts forms an effusion. In this case, the effusion passage portion is bent downward in the width direction due to the weight of the effusion formed on the upper surface thereof, and is deflected downward.

1‧‧‧core

2‧‧‧Sheet joint members

3‧‧‧Striped flakes

3f‧‧‧The first part

5‧‧‧ conveyor belt

6‧‧‧Clean liquid ejector

7‧‧‧ Air knife

8‧‧‧ Air knife

9‧‧‧Roller

A‧‧‧ gas

D‧‧‧Distance

G‧‧‧Striped glass film

Ga‧‧‧ upper surface

Gb‧‧‧ lower surface

Gc‧‧ effluent passage

The last part of Ge‧‧‧

GR‧‧‧ glass reel

L‧‧‧ cleaning solution

LL‧‧ effluent

R1‧‧‧Clean area

R2‧‧‧Shipping area

S‧‧‧protective sheet

SR‧‧‧Sheet Roller

Claims (7)

A method for producing a glass film, comprising: a washing step of transporting a flexible strip-shaped glass film in a flat posture along a longitudinal direction, and a cleaning liquid disposed in a washing area disposed in the conveying path Washing the strip-shaped glass film; and a liquid-cutting step of ejecting gas toward the strip-shaped glass film in a liquid-cutting region disposed on a downstream side of the transport path from the cleaning region The strip-shaped glass film that is carried out toward the downstream side of the liquid-breaking region removes the cleaning liquid adhered to the cleaning step, and is characterized in that the gas is sprayed toward the upper surface of the strip-shaped glass film, and the pressure is blocked by the pressure. The cleaning liquid on the upper surface is transferred from the liquid-cutting region toward the downstream side, whereby an effusion composed of the cleaning liquid is formed on the upper surface. The method for producing a glass film according to the first aspect of the invention, wherein the plurality of conveying members arranged along the conveying path are supported while supporting the lower surface of the strip-shaped glass film in the liquid-cutting region. And the aforementioned cleaning liquid is blocked between the plurality of conveying members to form the liquid. The method for producing a glass film according to the first or second aspect of the invention, wherein the gas is sprayed toward an upstream side of the conveyance path. The method for producing a glass film according to any one of the first to third aspect, wherein the gas is sprayed toward the lower surface of the strip-shaped glass film in the liquid-breaking region to remove the gas film from the lower surface. In the aforementioned washing The aforementioned cleaning solution attached to the net step. The method for producing a glass film according to the fourth aspect of the invention, wherein the gas ejected toward the upper surface of the strip-shaped glass film and the gas ejected toward the lower surface are directed to the length of the strip-shaped glass film. The same part of the side direction is sprayed. The method for producing a glass film according to any one of the first to fifth aspect, wherein the strip-shaped sheet which is continuous with the strip-shaped glass film is used, and the long side of the strip-shaped glass film is finally a portion of the front portion of the strip-shaped sheet in the longitudinal direction of the strip-shaped sheet is joined via a sheet-like connecting member spanned between the two portions, and the sheet-like connecting member is disposed at a width of the two portions a portion and a narrow portion extending along an imaginary straight line connecting the centers of the two portions in the width direction and interposed between the two wide portions. The method for producing a glass film according to any one of the first to sixth aspect, further comprising: a winding step of: arranging the strip glass on a downstream side of the transport path from the liquid-breaking region The film roll is wound around the core to form a glass roll.