JP2019005707A - Method for manufacturing glass film - Google Patents

Abstract

To enable the washing of front and back faces of a glass ribbon without damaging the same when washing the front and back faces regardless of the thickness of the glass ribbon while transporting the glass ribbon along a longitudinal direction.SOLUTION: With regard to a method for manufacturing a glass film including a washing step P2 of washing the front and back surfaces 1a, 1b of a glass ribbon 1 with brush rollers 4, 4 paired on the front and the back surfaces 1a and 1b while transporting the glass ribbon along a longitudinal ribbon, the washing step P2 is executed in a state that one of the paired brush rollers 4, 4 is a reverse rotation brush roller 4x that rotates in a direction reverse to the transportation direction of the glass ribbon 1, and the other is a forward rotation brush roller 4y that rotates in a direction following the transportation direction of the glass ribbon 1.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a glass film manufacturing method including a cleaning step of cleaning the front and back surfaces of a glass ribbon while transporting the glass ribbon along the longitudinal direction.

  As is well known, the glass film manufacturing process may include a cleaning process for cleaning the front and back surfaces of the glass ribbon that is the source of the glass film. Thereby, for example, even when the front and back surfaces of the glass ribbon are contaminated due to the overlap with the protective sheet, the front and back surfaces can be cleaned along with the execution of the cleaning process. Here, Patent Document 1 discloses an example of a mode in which a cleaning process is executed.

  As shown in FIG. 4, in the aspect disclosed in the same document, the glass ribbon G is transported along the longitudinal direction (the V direction shown in FIG. 4), and is paired on the front surface Ga side and the back surface Gb side. The front and back surfaces Ga and Gb are cleaned by a pair of roll brushes B and B. Each of the pair of roll brushes B and B is rotated in a direction opposite to the conveying direction (V direction) of the glass ribbon G.

Japanese Patent Laying-Open No. 2015-181980

  However, when the cleaning process is performed in the above-described manner, the following problems to be solved have occurred.

  That is, in the above aspect, by rotating both the pair of roll brushes in the direction opposite to the conveyance direction of the glass ribbon, excessive tension acts on the glass ribbon on the downstream side of the conveyance path from both roll brushes. There is a difficulty in falling into a state. As a result, there has been a problem that glass ribbons (for example, having a thickness of 300 μm or less) whose thickness has been promoted in recent years are easily damaged along with the cleaning of the front and back surfaces. From such a current situation, even if the thickness of the glass ribbon is thin, establishment of a technique that can clean the front and back surfaces without damaging the glass ribbon has been expected.

  In the present invention made in view of the above circumstances, when the front and back surfaces of the glass ribbon are washed along the longitudinal direction, regardless of the thickness of the glass ribbon, the front and back surfaces are not damaged. A technical issue is to enable cleaning.

  The present invention, which was created to solve the above problems, is a cleaning that cleans the front and back surfaces with a rotating cleaning body that is paired on the front side and the back side of the glass ribbon while transporting the glass ribbon along the longitudinal direction. A method of manufacturing a glass film including a process, wherein one of the pair of rotating cleaning bodies is a counter-rotating cleaning body that rotates in a direction opposite to the glass ribbon transport direction, and the other is a glass ribbon transport direction. The cleaning step is characterized in that the cleaning process is performed in a state in which the cleaning body rotates in the direction of copying.

  In this method, during execution of the cleaning process, one of the pair of rotating cleaning bodies is a counter-rotating cleaning body and the other is a forward-rotating cleaning body, so that both rotating cleaning bodies are opposite to each other. It is rotated to. Thereby, the tension | tensile_strength which acts on a glass ribbon can be suppressed by the part which both rotation washing bodies are rotating in the opposite direction mutually. As a result, even when the glass ribbon is thin, it can be prevented from being damaged. From the above, according to the present method, while cleaning the front and back surfaces while transporting the glass ribbon along the longitudinal direction, regardless of the thickness of the glass ribbon, the front and back surfaces are not damaged. Cleaning is possible.

  In the above method, it is preferable that the rotational peripheral speed of the forward rotating cleaning body is higher than the conveying speed of the glass ribbon.

  Since the cleaning ability of the rotary cleaning body depends on the relative speed of the rotary cleaning body and the glass ribbon, cleaning can be performed more effectively by rotating the rotary cleaning body at a higher speed. Further, the frictional force acting on the glass ribbon by the counter-rotating cleaning body always acts in the opposite direction to the glass ribbon transport direction. On the other hand, the direction in which the frictional force acting on the glass ribbon by the forward rotation cleaning body changes depending on whether the rotational peripheral speed of the forward rotation cleaning body is higher or lower than the conveyance speed of the glass ribbon. More specifically, when the rotational peripheral speed is higher than the transport speed, the frictional force acts in the transport direction of the glass ribbon, and when the rotational peripheral speed is lower than the transport speed, the frictional force is Acts in the opposite direction to the transport direction. For this reason, if the rotational peripheral speed of the forward rotating cleaning body is higher than the conveying speed of the glass ribbon, the frictional force acting on the glass ribbon by the reverse rotating cleaning body and the friction acting on the glass ribbon by the forward rotating cleaning body. Forces can be applied in directions that cancel each other. For this reason, it becomes advantageous in suppressing the tension acting on the glass ribbon. Therefore, it becomes easier to clean the front and back surfaces without damaging the glass ribbon.

  In the above method, it is preferable that the rotational peripheral speed of the counter-rotating cleaning body and the rotational peripheral speed of the forward-rotating cleaning body are the same.

  In this way, the frictional force that acts on the glass ribbon by the counter-rotating cleaning body and the frictional force that acts on the glass ribbon by the forward-rotating cleaning body preferably cancel each other out, and excessive tension acts on the glass ribbon. Furthermore, it can be avoided reliably. As a result, it becomes easier to clean the front and back surfaces without damaging the glass ribbon.

  In the above method, it is preferable to clean the surface serving as the guarantee surface among the front and back surfaces of the glass ribbon with the counter-rotating cleaning body and cleaning the surface serving as the non-guaranteed surface with the forward rotation cleaning body.

  In order to improve the quality of the glass ribbon that has undergone the cleaning process, it is necessary to make the surface that is the guarantee surface of the front and back surfaces of the glass ribbon more clean in the cleaning process. If the surface to be guaranteed is cleaned with the counter-rotating cleaning body as in this method, the direction of rotation of the counter-rotating cleaning body when the counter-rotating cleaning body comes into contact with the surface to be the guarantee surface is the glass ribbon. The direction is opposite to the transport direction. For this reason, it becomes easy to remove the contamination of the surface serving as the guarantee surface, which is advantageous in cleaning the surface serving as the guarantee surface.

  In the above method, a plurality of pairs of rotating cleaning bodies to be paired are arranged along the conveyance path of the glass ribbon, and in each of the plurality of pairs, a surface to be a guarantee surface is cleaned with a counter-rotating cleaning body and a non-guaranteed surface It is preferable that the surface to be cleaned is cleaned with a forward rotating cleaning body.

  In this way, by arranging a plurality of pairs of rotating cleaning bodies to be paired, the opportunity to clean the front and back surfaces of the glass ribbon is obtained a plurality of times, and in each of the plurality of pairs, the surface serving as the guarantee surface is rotated in reverse. Since it is cleaned with the cleaning body, it is further advantageous in cleaning the surface to be a guarantee surface.

  In the above method, the glass ribbon is transported in a flat position, and the rotating cleaning body on the upper side of the glass ribbon is fixed while the position of the rotating cleaning body on the lower side of the glass ribbon is fixed. It is preferable to adjust the position of the body along the thickness direction of the glass ribbon. Here, the “flat position” means a posture in which the front and back surfaces of the glass ribbon are parallel to the horizontal plane, or a posture in which the front and back surfaces of the glass ribbon are inclined within a range of 10 ° or less with respect to the horizontal plane. To do.

  In this way, both rotations can be achieved by adjusting the position of the upper rotating cleaning body along the thickness direction of the glass ribbon relative to the lower rotating cleaning body of the glass ribbon in a fixed position. The magnitude | size of the force (henceforth clamping force) which pinches | interposes a glass ribbon in the thickness direction with a washing | cleaning body can be adjusted. That is, it is possible to adjust the holding force so that the size is appropriate for cleaning the front and back surfaces without damaging the glass ribbon. In addition, since the position of the rotary cleaning body on the lower side is fixed, it is possible to avoid that the height position at which the glass ribbon is conveyed moves up and down when adjusting the holding force.

  In said method, the thickness of a glass ribbon can be made into the range of 5 micrometers-300 micrometers.

  The method further includes an unwinding step of obtaining a glass ribbon by unwinding from the first glass roll, and a winding step of winding the glass ribbon that has undergone the cleaning step as a second glass roll. It is preferable to wash the glass ribbon obtained in the exiting step.

  If it does in this way, it will become possible to perform a washing process using a roll to roll (Roll to Roll) system. Therefore, the front and back surfaces of the glass ribbon can be cleaned while saving space.

  According to the method for producing a glass film according to the present invention, when the front and back surfaces of the glass ribbon are washed along the longitudinal direction, the front and back surfaces of the glass ribbon are not damaged regardless of the thickness of the glass ribbon. The back surface can be cleaned.

It is a side view which shows the outline of the manufacturing method of the glass film which concerns on embodiment of this invention. It is a side view which shows the washing | cleaning process in the manufacturing method of the glass film which concerns on embodiment of this invention. (A), (b) is a side view which shows the Example of this invention, (c), (d) is a side view which shows a comparative example. It is a side view for demonstrating the subject in the past.

  Hereinafter, the manufacturing method of the glass film which concerns on embodiment of this invention is demonstrated, referring attached drawing.

  As shown in FIG. 1, in the method for manufacturing a glass film according to the present embodiment, a glass ribbon 1 that is the source of the glass film is moved along the longitudinal direction by a plurality of transport rollers 2 using a roll-to-roll method. The processes P1 to P6 are executed while being conveyed.

  In the present embodiment, drive rollers and free rollers are mixed in the plurality of transport rollers 2. Moreover, the conveyance roller of the form which performs feeding operation in the state which pinched | interposed the glass ribbon 1 from the front and back both sides (conveyance roller which becomes a pair on the front and back) in the full length of the conveyance path | route of the glass ribbon 1 is not used.

  The glass ribbon 1 is formed to a thickness of 5 μm to 300 μm, and has a flexibility that can be bent. Here, according to the manufacturing method of the glass film which concerns on this embodiment, even if the thickness of a glass ribbon is thin, it is possible to wash | clean a front and back, without damaging this. Therefore, it is preferable to apply the manufacturing method of the glass film which concerns on this embodiment especially when the thickness of the glass ribbon 1 exists in the range of 5 micrometers-100 micrometers. Moreover, in this glass ribbon 1, while performing each process P1-P6, the surface 1a (upper surface) with the relatively small frequency | count of contact with the conveyance roller 2 is made into a guarantee surface, and the back surface with the relatively large frequency | count of contact 1b (lower surface) is a non-guaranteed surface.

  The manufacturing method of the glass film which concerns on this embodiment is unwinding process P1 which unwinds the glass ribbon 1 from the 1st glass roll 3, and the front and back 1a, conveying the unwinded glass ribbon 1 in a flat position. A cleaning process P2 for cleaning 1b with a cleaning liquid and a brush roller 4 as a rotating cleaning body, a rinsing process P3 for rinsing the front and back surfaces 1a and 1b of the cleaned glass ribbon 1 with a rinsing liquid, and a glass ribbon after rinsing A liquid draining process P4 for draining the cleaning liquid and rinse liquid remaining in 1 by gas injection, a drying process P5 for drying the liquid glass ribbon 1 that has been drained, and winding the dried glass ribbon 1 to form a second glass A winding process P6 as a roll 5 is included. Note that the rinsing step P3 is not necessarily executed and may be omitted. Moreover, you may provide a high voltage | pressure washing | cleaning process between the washing | cleaning process P2 and the rinsing process P3 as needed. In the high-pressure cleaning process, the glass ribbon 1 is cleaned by spraying a high-pressure cleaning liquid toward the front and back surfaces 1 a and 1 b of the glass ribbon 1.

  In the unwinding process P1, the glass ribbon 1 and the belt-shaped protective sheet 6 are removed from the first glass roll 3 wound in a roll shape in a state where the glass ribbon 1 and the flexible belt-shaped protective sheet 6 are overlapped. While continuously unwinding, both 1 and 6 are separated from each other. The separated glass ribbon 1 is sent to the cleaning process P2 on the downstream side of the transport path. On the other hand, the strip-shaped protective sheet 6 after separation is again wound up into a roll shape to form a first sheet roll 7.

  In the cleaning process P2, for example, pure water or water mixed with a detergent can be used as the cleaning liquid. The cleaning liquid is supplied to the front and back surfaces 1a and 1b from a plurality of supply means 8 (for example, nozzles and the like) arranged along the transport path on each of the front surface 1a side and the back surface 1b side of the glass ribbon 1.

  As shown in FIG. 2, the brush roller 4 used for the washing | cleaning process P2 is arrange | positioned so that it may become a pair by the surface 1a side of the glass ribbon 1, and the back surface 1b side. That is, the pair of brush rollers 4 and 4 sandwich the glass ribbon 1 in the thickness direction. Both the brush rollers 4 and 4 have the same radius R and the same length (length along the width direction of the glass ribbon 1). Each brush roller 4 rotates around the axis 4a extending along the width direction of the glass ribbon 1 so that the entire width of the front surface 1a or the back surface 1b of the glass ribbon 1 can be cleaned. .

  In this embodiment, two pairs of brush rollers 4 and 4 are arranged along the transport path. In the following description, for the sake of convenience, the brush rollers 4 and 4 arranged on the upstream side of the conveyance path of the glass ribbon 1 are referred to as first pair 9 and the brush rollers 4 and 4 arranged on the downstream side are referred to as the first pair 9. Described as second pair 10.

  In the brush rollers 4 belonging to the first pair 9 and the second pair 10, the radius R and the length (the length along the width direction of the glass ribbon 1) are the same. That is, in this embodiment, the radius R and the length of the total four brush rollers 4 are all the same. In addition, the radius R and length of the four brush rollers 4 do not necessarily need to be the same, and may differ.

  The brush rollers 4 and 4 do not necessarily need to be arranged in two pairs, and may be arranged in only one pair or three or more pairs. However, the upper limit of the logarithm is preferably 5 pairs. If it does in this way, it can avoid that the conveyance route of the glass ribbon 1 in the washing | cleaning process P2 becomes unduly long.

  In each of the first pair 9 and the second pair 10, the brush roller 4 disposed on the surface 1 a side is a counter-rotating brush roller 4 x that rotates in a direction against the conveying direction of the glass ribbon 1. On the other hand, the brush roller 4 arranged on the back surface 1b side is a positive rotation brush roller 4y that rotates in a direction following the conveying direction of the glass ribbon 1.

  Here, unlike the present embodiment, one of the paired brush rollers 4 and 4 is the reverse rotation brush roller 4x and the other is the normal rotation brush roller 4y. The reverse rotation brush roller 4x may be disposed on the 1b side, and the forward rotation brush roller 4y may be disposed on the surface 1a side. Moreover, the surface side where the reverse rotation brush roller 4x (forward rotation brush roller 4y) is arrange | positioned may differ between the 1st pair 9 and the 2nd pair 10. FIG. For example, in the first pair 9, the reverse rotation brush roller 4x is disposed on the front surface 1a side (the forward rotation brush roller 4y is on the back surface 1b side), and in the second pair 10, the reverse rotation brush roller 4x is disposed on the back surface 1b side (forward rotation). The brush roller 4y may be disposed on the surface 1a side (see FIG. 3A for this form).

  The rotational peripheral speed is the same between both the counter rotating brush roller 4x and the forward rotating brush roller 4y, and the rotational peripheral speed of both is higher than the conveying speed of the glass ribbon 1. ing. Further, between the first pair 9 and the second pair 10, the rotational peripheral speeds of the counter-rotating brush rollers 4x and the counter-rotating brush rollers 4y are the same. That is, in this embodiment, the rotational peripheral speeds of the four brush rollers 4 in total are all the same speed.

  Here, the rotational peripheral speed does not have to be the same between the counter-rotating brush roller 4x and the normal rotating brush roller 4y, and the rotation of the normal rotating brush roller 4y in comparison with the counter-rotating brush roller 4x. The peripheral speed may be high or low. However, even in this case, it is preferable to reduce the difference in rotational peripheral speed between the 4x and 4y as much as possible. Further, the rotational peripheral speeds of both 4x and 4y may be lower than the conveying speed of the glass ribbon 1. Further, regarding the rotational peripheral speeds of both 4x and 4y, one rotational peripheral speed is higher than the conveying speed of the glass ribbon 1, and the other rotating peripheral speed is lower than the conveying speed of the glass ribbon 1. May be.

  In each of the first pair 9 and the second pair 10, the position of the forward rotation brush roller 4y on the lower side of the glass ribbon 1 is fixed. On the other hand, the position of the reverse rotation brush roller 4x on the upper side of the glass ribbon 1 can be adjusted along the thickness direction of the glass ribbon 1.

  Thereby, while being able to change the separation distance D from the axis 4a of the reverse rotation brush roller 4x to the surface 1a of the glass ribbon 1, the reverse rotation brush roller 4x was pushed from the front surface 1a side to the back surface 1b side. It is possible to change the indentation length. Here, the difference between the radius R of the reverse rotation brush roller 4x and the above-mentioned separation distance D is the indentation length. Here, the “radius R of the reverse rotation brush roller 4x” means a radius in a state where the outer peripheral portion of the reverse rotation brush roller 4x is not in contact with the glass ribbon 1 and is not deformed. By changing the pushing length, it is possible to adjust the magnitude of the force that sandwiches the glass ribbon 1 in the thickness direction by the pair of brush rollers 4 and 4.

  In the rinsing step P3 shown in FIG. 1, for example, pure water or the like can be used as the rinsing liquid. In the same manner as in the cleaning step P2, the rinsing liquid is supplied from the plurality of supply means 11 (for example, nozzles) arranged along the transport path on the front surface 1a side and the back surface 1b side of the glass ribbon 1 respectively. Supply to 1a, 1b.

  In the liquid draining step P4, the front and back surfaces 1a are formed from a plurality of liquid draining means 12 (for example, an air knife) arranged along the transport path on each of the front surface 1a side and the back surface 1b side of the glass ribbon 1 after rinsing. , 1b, gas (for example, air) is injected. Thereby, the cleaning liquid and the rinse liquid remaining on the front and back surfaces 1a and 1b of the glass ribbon 1 are removed by the pressure of the gas.

  In the drying step P5, the front surface of the glass ribbon 1 is removed by a plurality of drying means 13 (for example, a dryer or the like) arranged along the conveyance path on each of the front surface 1a side and the back surface 1b side of the glass ribbon 1 after draining. The back surfaces 1a and 1b are dried.

  In the winding process P6, by continuously winding the glass ribbon 1 after drying and the flexible belt-shaped protective sheet 15 unwound from the second sheet roll 14 in a roll shape, The second glass roll 5 is used. Thus, the main process of the glass film manufacturing method according to the present embodiment is completed.

  Hereinafter, main actions and effects of the glass film manufacturing method will be described.

  According to the above glass film manufacturing method, the pair of brush rollers 4 and 4 (reverse rotation brush roller 4x and forward rotation brush roller 4y) are rotated in opposite directions during the cleaning process P2. ing. Thereby, the tension | tensile_strength which acts on the glass ribbon 1 can be suppressed only to the extent that both 4x and 4y rotate in the opposite direction mutually. As a result, even when the glass ribbon 1 is thin, it can be prevented from being damaged. Thereby, when the front and back surfaces 1a and 1b are washed while transporting the glass ribbon 1 along the longitudinal direction, the front and back surfaces 1a and 1b are not damaged regardless of the thickness of the glass ribbon 1. Cleaning is possible.

  Here, the manufacturing method of the glass film which concerns on this invention is not limited to the aspect demonstrated by said embodiment. For example, in the above embodiment, a brush roller is used as the rotary cleaning body, but other than this, a cylindrical sponge such as polyurethane, melamine, PVA, rubber, sponge can be used as the rotary cleaning body. .

  Moreover, in said embodiment, although it has become the aspect which performs a washing | cleaning process, conveying a glass ribbon along a longitudinal direction using a roll-to-roll system, it is not limited to this. Absent. For example, the glass ribbon formed continuously by the downdraw method (for example, the overflow downdraw method) is transported in the longitudinal direction while carrying out the cleaning process, and then wound into a roll to produce a glass roll. It is good also as an aspect to do.

  Two conditions (Example 1 and Example 2) which become the Example of this invention shown to Fig.3 (a), (b), and two conditions which become a comparative example shown to FIG.3 (c), (d) Under the total four conditions (Comparative Example 1 and Comparative Example 2), the cleaning process P2 was performed on the glass ribbon 1 unwound from the glass roll 3 respectively. And it verified about the cleanliness of front and back 1a, 1b in glass ribbon 1 which passed through washing process P2, and the breakage rate of glass ribbon 1 accompanying processes P1-P6.

  First, matters common to all four conditions will be described.

  In each of the four conditions, two pairs of brush rollers 4 and 4 were paired. That is, a total of four brush rollers 4 were used in each condition. Between the four brush rollers 4, the radius R, the length (the length along the width direction of the glass ribbon 1), and the rotational peripheral speed are the same. Further, the radius R, the length, and the rotational peripheral speed of the brush roller 4 are the same among the four conditions.

  The radius R of each brush roller 4 is 30 mm. The brush roller 4 was rotated at a rotational speed of 300 rpm during the execution of the cleaning process P2. Further, in each of the first pair 9 and the second pair 10, the indentation length from the front surface 1a side to the back surface 1b side with respect to the brush roller 4 on the upper side of the glass ribbon 1 was 0.4 mm.

  The thickness of the glass ribbon 1 is 50 μm. While transporting the glass ribbon 1 at a transport speed of 0.05 m / s, pure water as a cleaning liquid was supplied to the front and back surfaces 1a and 1b, and the front and back surfaces 1a and 1b were cleaned with pure water and the brush roller 4. . Moreover, in this glass ribbon 1, the surface 1a (upper surface) is a guarantee surface among front and back 1a, 1b.

  Next, matters that differ between the four conditions will be described.

  As shown in FIG. 3 (a), in Example 1, the brush roller 4 on the front surface 1a side in the first pair 9 is a reverse rotation brush roller 4x, and the brush roller 4 on the back surface 1b side is a normal rotation brush roller 4y. did. Furthermore, the brush roller 4 on the front surface 1a side in the second pair 10 was a normal rotation brush roller 4y, and the brush roller 4 on the back surface 1b side was a reverse rotation brush roller 4x.

  As shown in FIG. 3 (b), in Example 2, in each of the first pair 9 and the second pair 10, the brush roller 4 on the front surface 1a side is set as the reverse rotation brush roller 4x, and the brush roller on the back surface 1b side. 4 was a positive rotation brush roller 4y. That is, the aspect of Example 2 is the same aspect as the above embodiment.

  As shown in FIG.3 (c), in the comparative example 1, in each of the 1st pair 9 and the 2nd pair 10, both the brush roller 4 by the side of the surface 1a and the brush roller 4 by the side of the back surface 1b are made forward rotation brush. It was set as roller 4y.

  As shown in FIG. 3D, in Comparative Example 2, in each of the first pair 9 and the second pair 10, both the brush roller 4 on the front surface 1a side and the brush roller 4 on the back surface 1b side are reversely rotated. It was set as roller 4x.

  [Table 1] shows the results of verification. Here, in the verification of cleanliness, the number of particles remaining on the surface 1a (guaranteed surface) of the glass ribbon 1 was measured by a particle counter, and the measurement result was evaluated. In the item of cleanliness, “◯” means that the surface 1a was extremely clean, “Δ” means that the surface 1a was clean, and “x” means that the surface 1a was clean. Means not clean. In the item of breakage rate, “◯” means that the breakage rate was less than 5%, and “x” means that the breakage rate was 5% or more. In addition, a "breakage rate" is a ratio (percentage) which the number of the glass rolls broken in process P1-P6 accounts to the number of the glass rolls provided to process P1-P6.

  As shown in [Table 1], it can be seen that in Comparative Example 1, the cleanness of the surface 1a (guaranteed surface) of the glass ribbon 1 is low, and the probability of breakage of the glass ribbon 1 is high. Further, in Comparative Example 2, it can be seen that although the cleanness of the surface 1a is high, the probability of breakage is high. On the other hand, in Example 1 and Example 2, it turns out that the surface 1a becomes clean and also the probability that damage will occur is low.

  From the above, according to the method for producing a glass film according to the present invention, when the front and back surfaces 1a and 1b are washed while transporting the glass ribbon 1 along the longitudinal direction, the thickness of the glass ribbon 1 is increased or decreased. Regardless, it is assumed that the front and back surfaces 1a and 1b can be cleaned without damaging them.

1 glass ribbon 1a front surface 1b back surface 3 first glass roll 4 brush roller 4x reverse rotation brush roller 4y forward rotation brush roller 5 second glass roll 9 first pair 10 second pair P2 cleaning process

Claims (8)

A method for producing a glass film comprising a cleaning step of cleaning the front and back surfaces with a rotating cleaning body paired with the front side and the back side of the glass ribbon while conveying the glass ribbon along the longitudinal direction,
One of the pair of rotating cleaning bodies is a counter-rotating cleaning body that rotates in a direction opposite to the conveyance direction of the glass ribbon, and the other is a forward rotation cleaning body that rotates in a direction following the conveyance direction of the glass ribbon. In the state made, the said washing | cleaning process is performed, The manufacturing method of the glass film characterized by the above-mentioned.   The method for producing a glass film according to claim 1, wherein a rotational peripheral speed of the positive rotation cleaning body is higher than a conveyance speed of the glass ribbon.   The method for producing a glass film according to claim 2, wherein the rotational peripheral speed of the counter-rotating cleaning body and the rotational peripheral speed of the forward-rotating cleaning body are the same.   The surface which becomes a guarantee surface among the front and back surfaces of the glass ribbon is cleaned with the reverse rotation cleaning body, and the surface which is a non-guaranteed surface is cleaned with the forward rotation cleaning body. The manufacturing method of the glass film in any one of. While arranging a plurality of pairs of the rotating cleaning bodies along the conveyance path of the glass ribbon,
5. In each of the plurality of pairs, the surface serving as the guarantee surface is cleaned with the reverse rotation cleaning body, and the surface serving as the non-guaranteed surface is cleaned with the forward rotation cleaning body. Glass film manufacturing method. While transporting the glass ribbon in a flat position,
Among the pair of rotary cleaning bodies, with the position of the rotary cleaning body below the glass ribbon fixed, the position of the rotary cleaning body above the glass ribbon is set in the thickness direction of the glass ribbon. It adjusts along, The manufacturing method of the glass film in any one of Claims 1-5 characterized by the above-mentioned.   The thickness of the said glass ribbon exists in the range of 5 micrometers-300 micrometers, The manufacturing method of the glass film in any one of Claims 1-6 characterized by the above-mentioned. An unwinding step of obtaining the glass ribbon by unwinding from the first glass roll; and a winding step of winding the glass ribbon that has undergone the cleaning step as a second glass roll;
In the said washing | cleaning process, the said glass ribbon obtained at the said unwinding process is wash | cleaned, The manufacturing method of the glass film in any one of Claims 1-7 characterized by the above-mentioned.

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