TW201502092A - Glass tape, glass tape manufcturing method, and article manufacturing method - Google Patents

Abstract

A glass tape (1) having a thickness D, a width W, and a length L satisfies D<W and W<L. The glass tape (1) curves in the width direction. The glass tape (1) has a first main surface (F1), a second main surface (F2) opposite to the first main surface (F1), and two side edges (3). The glass tape (1) curves between the two side edges (3). A longitudinal median plane (CF) passing through the two side ridges (3) curves. The glass tape (1) preferably curves in one direction between the two ridges (3).

Description

Glass tape, glass tape manufacturing method, and product manufacturing method

The present invention relates to a glass ribbon having toughness and flexibility, a method for producing a glass ribbon, and a method for producing the product.

Patent Document 1 discloses a glass ribbon (glass tape) having a thickness of 100 μm or less. This glass ribbon will not break even if it is wrapped around a person's finger. The surface of the glass ribbon is formed as smooth as possible. In the case where the glass ribbon is disposed on the glass plate, the contact between the two faces is a surface contact.

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2011-46593

In the surface contact of the smooth faces, optical contact occurs. By optical contact, there is a case where the glass ribbon and the glass sheet are tightly adhered together and it is difficult to perform the positioning operation of the glass ribbon.

The present invention has been made in view of the above problems, and an object thereof is to provide a glass package, a method for producing a glass package, and a method for producing a product using a glass package, which can suppress occurrence of optical contact and facilitate positioning work.

According to a first aspect of the invention, the glass ribbon has a thickness D, a width W, and a length L, and satisfies D < W. The glass ribbon is bent relative to the width direction.

The glass ribbon of the present invention preferably has two sides and is curved to the two sides.

The glass ribbon of the present invention preferably is bent in one direction to the two sides.

In the glass ribbon of the present invention, preferably, the center surface of the two sides is bending.

In the glass ribbon of the present invention, it is preferred that the side has a convex curved surface.

The glass ribbon of the present invention is preferably used by being disposed on a flat surface. When the glass ribbon is disposed such that the two side edges abut against the flat surface, the bending rate R is a degree of capillary phenomenon caused by the space between the glass ribbon and the flat surface injected with the liquid. Bending is preferred.

In the glass ribbon of the present invention, it is preferred that the bending rate R is 0.001% or more. Within 0%.

R=(H/W)×100

H is a length of a perpendicular line from the bottom of the curved surface facing the flat surface to the flat surface when the glass ribbon is placed such that the two side edges abut against the flat surface.

The glass ribbon of the present invention preferably has a first main surface and a second main surface facing the first main surface. Preferably, the first main surface is curved along the second main surface.

The glass ribbon of the present invention preferably satisfies W < L.

According to a second aspect of the present invention, a glass ribbon manufacturing method includes a heating step, an extending step, and a bending step. The heating step is to heat the mother glass plate. The extending step is to extend the heated mother glass sheet to form a base glass ribbon having a thickness Db, a width Wb, and a length Lb and satisfying Db < Wb. The bending step is such that the base glass tape having two side edges at both end portions in the width direction is bent in one direction to the two side edges.

In the method for manufacturing a glass ribbon according to the present invention, preferably, the bending step includes: a step of holding the base glass tape with a mold; and a temperature increasing step of coating the first main surface side of the base glass The ambient temperature and the ambient temperature on the second main surface side respectively increase the temperature of the first main surface side and the second main surface side at different temperature increase rates so as to reach the first temperature and the second temperature in the first period; a holding step of maintaining the ambient temperature on the first main surface side and the ambient temperature on the second main surface side at the first temperature and the second temperature in the second period; and a cold cooling step The ambient temperature on the first main surface side of the first temperature and the ambient temperature on the second main surface side held at the second temperature are each set to reach the third temperature in the third period. The main surface side and the second main surface side are quenched at different supercooling speeds. Which should The temperature increasing step, the holding step, and the quenching step are performed in a state where the base glass ribbon is caught by the mold.

Alternatively, in the method of manufacturing a glass ribbon of the present invention, preferably, the bending step includes a staking step of squeezing the base glass ribbon with a curved mold while heating the base glass ribbon.

Alternatively, in the method for manufacturing a glass ribbon of the present invention, preferably, the bending step comprises: a step of holding the base glass ribbon while heating the base glass ribbon, and clamping the base glass ribbon; and a cold cooling step The first main surface side and the second main surface side of the base glass ribbon fed from the mold are quenched at different rapid cooling rates.

Alternatively, in the method of manufacturing a glass ribbon of the present invention, preferably, the bending step is performed in the extending step. Preferably, the heating step includes a step of heating the first main surface side and the second main surface side of the mother glass sheet at different temperatures.

According to a third aspect of the present invention, the product manufacturing method is a method of producing a product comprising a glass ribbon and a first glass sheet as components. The product manufacturing method includes a disposing step of disposing the glass wrap on the first glass plate so that two side edges of the glass wrap abut against the first glass plate, and an injecting step A liquid is injected into the space between the glass ribbon and the first glass sheet.

In the method of producing a product of the present invention, it is preferable that the method further comprises the step of disposing the second glass sheet on the glass ribbon. This glass ribbon functions as a thickness defining element.

According to the invention, since the glass ribbon is bent in the width direction, when the glass ribbon is disposed on the flat surface of the glass sheet, the contact area between the glass ribbon and the glass sheet is small. As a result, the generation of the optical contact can be suppressed, and the positioning operation of the glass ribbon on the glass plate can be easily performed.

1‧‧‧glass bag

3‧‧‧ side

4‧‧‧ convex surface

5‧‧‧ glass plate

7‧‧‧flat surface

9‧‧‧ Space

29‧‧‧Mold

37‧‧‧Basic glass tape

39‧‧‧Mold

51‧‧‧ mother glass plate

D‧‧‧thickness

W‧‧‧Width

L‧‧‧ length

Db‧‧‧ thickness

Wb‧‧‧Width

Lb‧‧‧ length

CF‧‧‧ center face

F1‧‧‧1st main surface (curved surface)

F2‧‧‧2nd main surface (curved surface)

F3‧‧‧Main surface (1st main surface)

F4‧‧‧Main surface (2nd main surface)

F5‧‧‧Main surface (1st main surface)

F6‧‧‧Main surface (2nd main surface)

1 is a perspective view showing a glass ribbon according to Embodiment 1 of the present invention; FIG. 2 is a cross-sectional view showing a glass ribbon according to Embodiment 1 of the present invention; and FIG. 3 is a front view showing a glass ribbon of FIG. Schematic diagram Fig. 3B is an enlarged view of a side of the glass ribbon of Fig. 3; Fig. 4 is a flow chart showing a method of manufacturing a glass ribbon according to Embodiment 2 of the present invention; and Fig. 5 is a view showing a third embodiment of the present invention. FIG. 6 is a longitudinal sectional side view showing a schematic configuration of a glass ribbon manufacturing apparatus according to Embodiment 4 of the present invention; and FIG. 7 is a temperature control showing the glass ribbon manufacturing apparatus of FIG. Fig. 8 is a flow chart showing a bending process of a method for producing a glass ribbon according to a fifth embodiment of the present invention; and Fig. 9 is a front view showing a mold used in a method for producing a glass ribbon according to a sixth embodiment of the present invention. Fig. 10 is a view showing temperature control of a method for producing a glass ribbon according to a seventh embodiment of the present invention; and Fig. 11 is a view showing a schematic structure of a glass ribbon manufacturing apparatus for performing a method for manufacturing a glass ribbon according to an eighth embodiment of the present invention; 12 is a cross-sectional view of a glass ribbon according to a first example of the ninth embodiment of the present invention; and FIG. 12B is a cross-sectional view of a glass ribbon of a second example of the ninth embodiment of the present invention; Figure 12C is the present invention A cross-sectional view of a glass ribbon of a third example of the ninth embodiment; a second embodiment of the glass ribbon of the fourth example of the ninth embodiment of the present invention; and a thirteenth embodiment of the glass ribbon of the embodiment of the present invention; Figure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference numerals and the description will not be repeated. In addition, the glass tape manufacturing method is described as "manufacturing method", and the glass tape manufacturing device is described as "manufacturing device".

(Embodiment 1)

〔Fundamental〕

Fig. 1 is a perspective view showing a glass package 1 according to Embodiment 1 of the present invention. The glass ribbon 1 has a thickness D, a width W, and a length L, and satisfies D < W. Glass bag with 1 series relative It is bent in the width direction of the glass ribbon 1. In the first drawing, the glass plate 5 having the flat surface 7 is shown, and the glass cover 1 is placed on the flat surface 7.

The glass tape 1 has high toughness and high flexibility as compared with a flat glass having a large thickness such as window glass. The thickness D of the glass ribbon 1 having high toughness and high flexibility is, for example, 1 μm to 100 μm. The thickness D represents, for example, an average thickness. Further, in order to obtain the glass ribbon 1 having sufficiently high toughness and sufficiently high flexibility, the thickness D of the glass ribbon 1 is preferably from 4 μm to 50 μm, more preferably from 10 μm to 30 μm. The thickness D represents, for example, an average thickness. The glass wrap 1 has two sides 3. The two sides 3 are substantially parallel. The glass wrap 1 is bent to 2 sides 3. In other words, the glass ribbon 1 is bent by using the two side edges 3 as both end portions. The width W of the glass tape 1 is, for example, 5 mm to 50 mm. The width W represents, for example, an average width. Further, in order to obtain the glass ribbon 1 which is easy to bend, the width W of the glass ribbon 1 is preferably from 7 mm to 40 mm, more preferably from 10 mm to 30 mm.

According to the first embodiment, since the glass ribbon 1 is bent in the width direction, when the glass ribbon 1 is placed on the flat surface 7 of the glass sheet 5, the contact between the two is in line contact. That is, as shown in Fig. 1, the two side edges 3 are in line contact with the glass sheet 5. Due to the contact of the tether, the contact area of the glass ribbon 1 with the glass plate 5 is small compared to the case of the surface contact. As a result, the occurrence of optical contact can be suppressed, and the positioning operation of the glass ribbon 1 on the glass plate 5 can be easily performed. Further, the glass plate 5 is a concept including a glass substrate.

[bending of glass tape]

The bending of the glass ribbon 1 will be described with reference to Fig. 2 . Figure 2 is a cross-sectional view of the glass package 1. Fig. 2 shows a cross section when the glass ribbon 1 is cut by a plane orthogonal to the side edges 3. The direction CR1 and the direction CR2 indicate directions orthogonal to the flat surface 7, and are opposite to each other.

The glass ribbon 1 has a first main surface F1 and a second main surface F2 that faces the first main surface F1. The second main surface F2 has a bottom BM. In the present specification, the bottom portion BM indicates the bottom point of the concave second main surface F2 in the cross-sectional view. The bottom BM is formed along the side edges 3.

In the glass ribbon 1, the center surface CF of the two side edges 3 is curved. That is, at least the second main surface F2 is curved so as to be curved by the center surface CF of the two side edges 3. In the first embodiment, the first main surface F1 and the second main surface F2 are curved so as to be curved by the center surface CF of the two side edges 3.

In the present specification, the center plane CF is the first main surface F1 and the second main surface F2. Equidistant virtual faces. In the cross-sectional view, when the glass ribbon 1 is placed on the flat surface 7, the center plane CF is located on the two side edges 3 and the plurality of midpoints PM. In addition, in FIG. 2, for the simplification of the drawing, one midpoint PM is shown. The midpoint PM refers to a point connecting a line between the first point P1 on the first main surface F1 and the second point P2 on the second main surface F2.

Here, the length from the first point P1 to the one side 3 along the first main surface F1 is A1, and the length from the first point P1 to the other side 3 along the first main surface F1 is B1. The length along the second main surface F2 from the second point P2 to the one side 3 is a1, and the length from the second point P2 to the other side 3 along the second main surface F2 is b1, and the following is true. Relationship.

A1/B1=a1/b1

Further, the glass ribbon 1 is bent to one side (direction CR1) to two side edges 3 with respect to the width direction. In other words, the glass ribbon 1 is bent in the one direction (direction CR1) with the two side edges 3 as both end portions with respect to the width direction. Therefore, the second main surface F2 has one bottom BM. The two side edges 3 of the glass tape 1 are in contact with the flat surface 7. That is, in the cross-sectional view, the glass ribbon 1 is in contact with the flat surface 7 at two contact points CP. The second main surface F2 of the glass ribbon 1 is formed in such a manner that the space 9 is line-symmetrical. The space 9 is a space between the second main surface F2 and the flat surface 7.

Further, the first main surface F1 is curved along the second main surface F2. That is, the first main surface F1 is substantially parallel to the second main surface F2. Therefore, each of the first main surface F1 and the second main surface F2 is a curved surface that is convexly and concavely curved along the direction CR1.

[width, length, and side of the glass tape]

The width W, the length L, and the side 3 of the glass ribbon 1 will be described with reference to Fig. 1 , Fig. 3A, and Fig. 3B. Fig. 3A is a front view showing the glass tape 1. Fig. 3B is an enlarged view of a region 11 of Fig. 3A. The width W is a length between the two side edges 3 that are in contact with the flat surface 7 (hereinafter referred to as "wiring") C (the length along the direction orthogonal to the two side edges 3). The length L is the length of the wire C (along the length of the side 3). The width W is shorter than the length L. That is, the glass ribbon 1 satisfies W < L. The side 3 is along the length of the glass wrap 1 .

The side 3 has a convex curved surface 4 that protrudes to the outside of the glass ribbon 1. Further, in the corner portion 3a and the corner portion 3b of the four corners of the cross-sectional view, the two side edges 3 are smoothly connected to the second main surface F2 and the first main surface F1, respectively. Further, the two side edges 3 are connected to the second main surface F2 and the first main surface F1 so that the respective angles of the corner portion 3a and the corner portion 3b are obtuse. Result, can The stress is concentrated on the corner portion 3a and the corner portion 3b at four corners of the cross-sectional view. In addition, it is also possible to prevent the occurrence of defects and cracks. As a result, the glass ribbon 1 can be bent with a large curvature.

The XYZ coordinates will be defined. In the present specification, the X-axis direction is a direction orthogonal to the wiring C and parallel to the flat surface 7. The Y-axis direction is a direction parallel to the wire C. The Z-axis direction is a direction orthogonal to the X-axis direction and the Y-axis direction. Therefore, the width W is substantially equal to the length of the glass ribbon 1 along the X-axis direction. The length L is the length of the glass ribbon 1 along the Y-axis direction.

[One-way bending and capillary phenomenon of glass tape]

The unidirectional bending of the glass ribbon 1 will be described with reference to Figs. 1 and 3A. The glass ribbon 1 is bent in one direction with respect to the width direction to two sides. In this specification, the bending of a plurality of directions is defined as "undulation" to distinguish one-way bending.

The degree of unidirectional bending of the glass ribbon 1 is expressed as a bending rate R. The bending rate R (%) is defined by the following formula using the width W and the maximum height H of the glass ribbon 1.

R=(H/W)×100

In the first embodiment, the width W and the maximum height H are measured by arranging the glass ribbon 1 so that the two side edges 3 abut against the flat surface 7 of the glass sheet 5. Therefore, the width W is the length (the shortest distance) between the two wires C. The maximum height H is the length from the bottom line BM of the second main surface F2 (curved surface) facing the flat surface 7 to the perpendicular to the flat surface 7.

In the first embodiment, the glass ribbon 1 is placed on the flat surface 7 and used. Therefore, when the glass ribbon 1 is disposed in such a manner that the two side edges 3 abut against the flat surface 7, the degree of capillary action is caused by the space 9 between the glass ribbon 1 and the flat surface 7 as the liquid is injected. The bending rate R is bent. That is, the bending rate R is set to a value that causes a capillary phenomenon when a liquid is injected into the space 9. For example, the bending rate R is 0.001% or more and 1.0% or less. In order to effectively cause the capillary phenomenon, the bending rate R is as close as possible to 0.001%. On the other hand, when the bending rate R is smaller than 0.001%, optical contact may occur.

The preferred first and second examples of the glass ribbon 1 which is prone to capillary action are as follows. In the first example, the glass ribbon 1 contains SiO ₂ 60 to 70%, B ₂ O ₃ 10 to 20%, Al ₂ O ₃ 0 to 10%, CaO 0 to 10%, and ZnO 0 to 10% in terms of mass %. Composition of Sb ₂ O ₃ 0<~<1%. In the second example, the glass ribbon 1 contains SiO ₂ 55 to 65%, Al ₂ O ₃ 13 to 18%, B ₂ O ₃ 8 to 13%, and RO (MgO + CaO + SrO + BaO) in terms of mass %. 10~20% composition.

Next, the advantages of the capillary phenomenon will be explained. The capillary phenomenon is used to temporarily fix the glass ribbon 1 to the glass sheet 5 after the positioning operation of the glass ribbon 1 on the glass sheet 5 is completed. That is, the liquid injected into the space 9 from one end of the space 9 quickly reaches the other end of the space 9 by capillary action. As a result, the glass ribbon 1 is temporarily fixed to the glass sheet 5 by the surface tension of the liquid. In addition, it is possible to suppress air bubbles from entering between the glass ribbon 1 and the glass sheet 5. Therefore, it is preferable that the glass ribbon 1 is disposed in such a manner that the two side edges 3 abut against the glass sheet 5 (flat surface 7), and the liquid ribbon is applied to the glass ribbon 1 and the glass sheet 5 ( The space 9 between the flat faces 7) is bent in such a manner as to cause a capillary phenomenon. As a result, for example, when the glass ribbon 1 is used as a component of a product or a predetermined space (hereinafter referred to as a "thickness defining element"), the positioning accuracy of the thickness defining element can be improved. The thickness defining member is, for example, a gap member, a spacer, a sealing member, or the like.

Further, although the glass ribbon 1 is not limited to undulation, it is preferable that there is no undulation. The undulating glass ribbon is placed on a glass plate and filled with liquid to be temporarily fixed. If the glass ribbon has undulations, there is a case where a portion other than the side contacts the glass sheet before the liquid is injected. For example, in addition to the side, the glass ribbon 1 forms (x+1) spaces into which liquid can be injected in the case where x (x is an integer of 1 or more) portions are in line contact with the glass plate. When the liquid is injected, if the capacity of the space in which the liquid can be injected is different, the injection amount of the liquid may be uneven, and the strength of the temporary fixation may be uneven.

Further, even if the capacity of the space in which the liquid can be injected is assumed to be the same, in the case where the injection position of the liquid is biased toward the side of the injectable space, the injection amount of the liquid may be uneven, and it is possible to make the temporarily fixed strength. Not uniform. Further, if the amount of liquid injected is not uniform, bubbles may enter the space. The foam will reduce the temporarily fixed strength and reduce the positioning accuracy of the glass ribbon 1. Therefore, it is preferable that the glass ribbon 1 does not have undulations in which portions other than the two side edges 3 are in contact with the glass sheet 5 (flat surface 7).

(Embodiment 2)

The manufacturing method according to the second embodiment of the present invention will be described with reference to Figs. 1 to 4 . 4th FIG. 1 is a flow chart showing a method of manufacturing the glass ribbon 1 of the first embodiment. This manufacturing method includes a heating step S1, an extending step S3, and a bending step S5. In the heating step S1, a plate-shaped mother glass (hereinafter referred to as "mother glass plate") (not shown) is heated. In the extending step S3, the heated mother glass sheet is stretched to form a base glass ribbon (not shown) having a thickness Db, a width Wb, and a length Lb and satisfying Db < Wb. In the bending step S5, the base glass tape having two side edges at both end portions in the width direction is bent in one direction to two side edges. As a result, a glass ribbon 1 bent in one direction is produced.

In the second to seventh embodiments, the glass ribbon before the bending in the bending step S5 is defined as "base glass tape", which is different from the glass tape 1.

(Embodiment 3)

A product manufacturing method according to a third embodiment of the present invention will be described with reference to Fig. 1, Fig. 3, and Fig. 5 . Fig. 5 is a flow chart showing a method of manufacturing a product. The product manufacturing method is a method for producing a product including the glass ribbon 1 and the glass sheet 5 (first glass sheet) of the first embodiment as an element (hereinafter referred to as "the last product"). The product manufacturing method includes step S11 and step S13. In step S11, the glass ribbon 1 is placed on the glass sheet 5 so that the two side edges 3 of the glass ribbon 1 abut against the glass sheet 5. At this time, it is preferable that the two side edges 3 abut on the flat surface 7 of the glass sheet 5 as a whole, but there may be a portion that does not abut against the flat surface 7 of the glass sheet 5.

At step S13, liquid is injected into the space 9 between the glass ribbon 1 and the flat surface 7. The glass wrap 1 is temporarily fixed to the glass plate 5 by filling the liquid of the space 9 by capillary action. The liquid is, for example, a non-volatile liquid (for example, water) or a volatile liquid (for example, alcohol). In the case of using a volatile liquid, after temporarily fixing, when the final bonding is performed, the operation of drying the liquid can be omitted.

In step S15, the glass sheet 5 and the glass ribbon 1 are treated in accordance with the final product. The glass tape 1 is used, for example, as a thickness specifying member of the final product. In this case, step S15 includes a step of disposing the glass sheet (second glass sheet) (not shown) different from the glass sheet 5 (first glass sheet) on the glass ribbon 1. The final product is, for example, a product including two or more glass substrates and a thickness-defining element disposed between two glass substrates (for example, a solar cell, an electro-electroluminescence display, a microscope specimen, or the like). In the final product, The glass ribbon 1 has a flat surface shape without being bent, and functions as a thickness-defining element.

When the glass ribbon 1 is used as a thickness defining element of a solar cell, four glass ribbons 1 are arranged along four sides of a rectangular first glass substrate (step S11). Next, the four glass sheets 1 disposed are temporarily fixed by liquid injection (step S13). Further, a solar cell substrate or the like is disposed in a region surrounded by the four glass ribbons 1, and a second glass substrate having substantially the same shape as the first glass substrate is placed on the four glass ribbons 1 by The glass ribbon 1 is heated or the like, and the first glass substrate and the second glass substrate are bonded together (step S15).

When the glass ribbon 1 is used as the thickness defining element of the microscope specimen, the two glass ribbons 1 are placed along the two long sides of the rectangular third glass substrate (step S11). Next, the two glass ribbons are temporarily fixed to the third glass substrate by liquid injection (step S13). Further, the specimens are placed between the two glass ribbons 1 and the glass ribbon 1 is caught by the third glass substrate and the rectangular fourth glass substrate (step S15).

As described above, according to the third embodiment, the final product can be manufactured by effectively utilizing the characteristics of the glass ribbon 1 that is bent in one direction.

(Embodiment 4)

The manufacturing apparatus 23 according to Embodiment 4 of the present invention will be described with reference to Fig. 1, Fig. 3, Fig. 6, and Fig. 7. Fig. 6 is a longitudinal sectional side view showing a schematic configuration of the manufacturing apparatus 23. Fig. 7 is a view for explaining temperature control of the manufacturing apparatus 23.

The manufacturing device 23 is a heating device for manufacturing the glass ribbon 1 of the first embodiment. The manufacturing apparatus 23 includes a furnace 25, a heater 27, a mold 29, a heater 33, and a heater 35. The mold 29 includes a template 29A and a template 29B. The heater 27 and the mold 29 are disposed in the furnace 25. The heater 33 is disposed outside the inlet 36. The heater 35 is disposed outside the outlet 41. The inlet 36 and the outlet 41 are formed on one side and the other side of the furnace 25, respectively. In the furnace 25, a supply path 31 for filling nitrogen gas is formed.

First, the surrounding environment in the furnace 25 will be described. In the period s0 from the time T0 to the time T1 and the period s3 from the time T3 to the time T4, the furnace 25 is filled with nitrogen gas (N ₂ ). In the period s1 from the time T1 to the time T2 and the period s2 from the time T2 to the time T3, the inside of the furnace 25 is a vacuum.

Next, the load generated by the mold 29 will be described. Before the warming step, borrow The base glass tape 37 is held by the template 29A and the template 29B at a predetermined load P. Further, the main surface F3 (first main surface) and the main surface F4 (second main surface) of the base glass ribbon 37 are disposed in a opposed manner. Further, the main surface F3 and the main surface F4 are orthogonal to the vertical line. Further, in the template 29A, the surface facing the main surface F3 is a flat surface. In the template 29B, the surface opposite to the main surface F4 is a flat surface.

Next, the temperature control will be described. The temperature curve 53 represents the ambient temperature around the main surface F3. The temperature curve 54 represents the ambient temperature around the main surface F4. After the base glass wrap 37 is preheated from room temperature to temperature T0 by the heater 33, it is carried from the inlet 36 in the transport direction 38 between the template 29A and the stencil 29B. Next, the base glass tape 37 is held by the template 29A and the template 29B.

Next, the main surface F3 side is heated by the heater 27 from the temperature T0 to the temperature T1 in the period s0 (heating step). Next, the main surface F3 side is held at the temperature T1 by the heater 27 in the period s1 (heat preservation step). Further, the main surface F3 side receives the temperature control by the heater 27 in the period s2 (the cold cooling step), and is cooled from the temperature T1 to the temperature T3.

On the other hand, in the period s0 (heating step), the main surface F4 side is heated by the heater 27 from the temperature T0 to the temperature T2. Next, the main surface F4 side is held at the temperature T2 by the heater 27 in the period s1 (heat preservation step). Further, the main surface F4 side receives the temperature control by the heater 27 in the period s2 (the cold cooling step), and is cooled from the temperature T2 to the temperature T3.

The main surface F3 side and the main surface F4 side are subjected to temperature control by the heater 27 in the period s3 (cooling step), and are cooled from the temperature T3 to the temperature T0. At time t4, the load generated by the template 29A and the template 29B is released. As described above, at least the temperature rising step, the heat holding step, and the quenching step are performed in a state where the base glass tape 37 is caught by the mold 29.

Next, the base glass wrap 37 is conveyed from the outlet 41 to the outside of the furnace 25 along the conveyance direction 38, and is subjected to temperature control by the heater 35, and is cooled from the temperature T0 to room temperature. After the cold, the base glass wrap 37 is convexly curved in the vertical direction.

As described above, by changing the temperature increase rate of the main surface F3 side and the main surface F4 side (period s0), and cooling to the same temperature (T3) (period s2) from the different temperatures (T1, T2) in the same time, The base glass wrap 37 is bent in one direction. That is, the glass ribbon 1 is produced from the base glass tape 37.

In addition, the temperature T0 may also be room temperature. In this case, heater 33 and heating The operation of the device 35 is stopped. Alternatively, the heater 33 and the heater 35 may not be provided.

(Embodiment 5)

The manufacturing method according to the fifth embodiment of the present invention will be described with reference to Fig. 1, Fig. 3A, Fig. 4, and Fig. 6 to Fig. 8. This manufacturing method is performed using the manufacturing device 23. The manufacturing method is the same as the manufacturing method of the second embodiment described with reference to Fig. 4 . Fig. 8 is a flow chart showing a bending step S5 of the fifth embodiment.

In step S51, the base glass tape 37 is first gripped by the mold 29. In steps S53 to S57, the heater 27 is controlled to perform temperature control. Further, steps S53 to S57 are performed in a state where the base glass tape 37 is caught by the mold 29.

In step S53 (heating step), the ambient temperature on the main surface F3 side of the base glass ribbon 37 and the ambient temperature on the main surface F4 side reach the temperature T1 (first temperature) and temperature in the period s0 (first period), respectively. In the mode of T2 (second temperature), the main surface F3 side and the main surface F4 side are heated at different temperature elevation rates.

In the step S55 (heating step), in the period s1 (second period), the ambient temperature on the main surface F3 side and the ambient temperature on the main surface F4 side are maintained at the temperature T1 and the temperature T2, respectively. In step S57 (the cold cooling step), the ambient temperature on the main surface F3 side held at the temperature T1 and the ambient temperature on the main surface F4 side held at the temperature T2 reach the temperature T3 in the period s2 (third period), respectively. In the mode of the (third temperature), the main surface F3 side and the main surface F4 side are quenched at different different cooling rates.

As described above, the temperature rise rate of the main surface F3 side and the main surface F4 side is different (period s0), and is cooled to the same temperature (T3) (period s2) from the different temperatures (T1, T2) in the same time. The glass wrap 37 is bent in one direction. That is, the glass ribbon 1 is produced from the base glass tape 37.

(Common matters in the sixth embodiment and the seventh embodiment)

In the sixth and seventh embodiments of the present invention, the manufacturing method is executed by the manufacturing apparatus 23. However, the temperature control shown in Fig. 7 is not performed. The manufacturing method is the same as the manufacturing method of the second embodiment described with reference to Fig. 4, but the difference between the embodiment 6 in the fourth embodiment and the step S5 in the seventh embodiment is that the mold is to be molded by the heater 27. The ambient temperature on the main surface F3 side and the ambient temperature on the main surface F4 side of the mold 39 of the Fig. 9 or the mold 29) of Fig. 6 are maintained at the same temperature (for example, 620 ° C).

(Embodiment 6)

The manufacturing method according to the sixth embodiment of the present invention will be described with reference to Fig. 1, Fig. 3, Fig. 4, Fig. 6, Fig. 6, and Fig. 9. Fig. 9 is a front view showing the mold 39 used in the manufacturing method. The mold 39 of the manufacturing device 23 is replaced with a mold 39. The mold 39 includes a template 39A and a template 39B. In the template 39A, the contact surface (forming surface) with the main surface F3 is a concave surface that is curved in one direction. In the template 39B, the contact surface (forming surface) with the main surface F4 is a convex surface that is curved in the same direction as the contact surface of the template 39A.

In step S5, while the base glass wrap 37 is heated by the heater 27, the base glass wrap 37 is held by the curved mold 39. As a result, the base glass wrap 37 is bent in one direction in accordance with the shape of the mold 39.

As described above, the glass ribbon 1 is produced from the base glass tape 37 through steps S1 to S5.

(Embodiment 7)

A manufacturing method according to a seventh embodiment of the present invention will be described with reference to Fig. 1, Fig. 3, Fig. 4, and Fig. 6. Step S5 includes the first step and the second step. In the first step, the base glass wrap 37 is held by the mold 29 while the base glass wrap 37 is heated by the heater 27.

In the second step, the control heater 35 cools the main surface F3 side and the main surface F4 side of the base glass ribbon 37 sent from the mold 29 at different rapid cooling rates (cooling speeds). Specifically, the cooling is performed so that the supercooling speed on the main surface F4 side is larger than the supercooling speed on the main surface F3 side. After the cold, the base glass wrap 37 is convexly curved in a direction perpendicular to the upward direction. Therefore, by the difference in the cooling speeds of the main surface F3 side and the main surface F4 side, the undercooled base glass ribbon 37 is bent in one direction.

As described above, the glass ribbon 1 is produced from the base glass tape 37 through steps S1 to S5.

Next, detailed control of the manufacturing method of the seventh embodiment will be described with reference to FIGS. 6 and 10 . Fig. 10 is a view for explaining temperature control of the manufacturing method.

The temperature curve 63 represents the ambient temperature around the main surface F3. The temperature curve 64 represents the ambient temperature around the major surface F4. In the period s10 (time t10 to time t11), period s11 (time t11 to time t12), and period s12 (time t12 to time t13), the heater 27 is controlled. Perform temperature control. In the period s13 (time t13 to time t14), period s14 (time t14 to time t15), period s15 (time t15 to time t16), and period s16 (time t16 to time t17), the heater 35 is controlled to perform temperature control. .

The base glass wrap 37 is carried from the inlet 36 in the transport direction 38 between the template 29A and the formwork 29B. Next, the template 29A and the template 29B hold the base glass tape 37 before the temperature raising step.

The main surface F3 side is heated from the temperature T0 to the temperature T11 in the period s10 (the temperature rising step on the main surface F3 side). Next, the main surface F3 side is held at the temperature T11 in the period s11 and the period s12 (the heat retention step on the main surface F3 side). On the other hand, the main surface F4 side is heated from the temperature T0 to the temperature T11 in the period s10 and the period s11 (the temperature rising step on the main surface F4 side). Next, the main surface F4 side is held at the temperature T11 (the heat retention step on the main surface F4 side) in the period s12.

At time t13, the template 29A and the template 29B are released from the load. Next, the base glass wrap 37 is transported from the outlet 41 to the outside of the furnace 25 along the conveying direction 38. The handling time in this case can be ignored because it is short enough to not affect the temperature control of the base glass wrap 37.

The main surface F3 side is cooled from the temperature T11 to the temperature T12 in the period s13 and the period s14 (the cold cooling step on the main surface F3 side). Further, the main surface F3 side is cooled from the temperature T12 to the temperature T0 in the period s15 and the period s16 (the cooling step on the main surface F3 side). On the other hand, the main surface F4 side is cooled from the temperature T11 to the temperature T12 in the period s13 (the cold cooling step on the main surface F4 side). Further, the main surface F4 side is cooled from the temperature T12 to the temperature T0 in the period s14 and the period s15 (the cooling step on the main surface F4 side). After the cold, the base glass wrap 37 is convexly curved in a direction perpendicular to the upward direction. Therefore, the main surface F3 side and the main surface F4 side are heated to the same temperature (T11) at different temperature increase rates (period s10, period s11, period s12), and the main surface F3 side and the main surface are different at different cooling rates. The F4 side was subjected to cold cooling (period s13, period s14), and the undercooled base glass wrap 37 was bent in one direction. That is, the glass ribbon 1 is produced from the base glass tape 37.

Here, in the seventh embodiment, for example, the temperature T0, the temperature T11, and the temperature T12 are respectively room temperature, 620 ° C, and 555 ° C. Since the temperature T0 is room temperature, the operation of the heater 33 can be stopped or the heater 33 can be omitted. For example, the period s10, the period s11, the period s12, the period s13, the period s14, the period s15, and the period s16 are respectively 2 points, 0.5 minutes, 0.5 minutes, 1.5 minutes, 1.5 minutes, 3.5 minutes, and 3.5 minutes. For example, the predetermined load P generated by the mold 29 is 0.5 KN (kilonewton). For example, in the period s10, the furnace 25 is filled with nitrogen gas (N ₂ ), and during the period s11 and the period s12, the inside of the furnace 25 is vacuum.

(Embodiment 8)

A manufacturing method according to Embodiment 8 of the present invention will be described with reference to Fig. 1 and Fig. 3A and Fig. 11 . Fig. 11 is a longitudinal sectional side view showing a schematic configuration of a glass ribbon manufacturing apparatus 43 for executing a manufacturing method. The manufacturing method is the same as the manufacturing method of the second embodiment described with reference to Fig. 4, but the difference is that step S5 is executed in step S3. The details will be described below.

As shown in FIG. 11, the manufacturing apparatus 43 is provided with the holding part 45, the heater 47, and the cylinder 49. The mother glass plate 51 is set to the holding portion 45 along the vertical line. Next, in step S1, the heater 47 is controlled to heat the main surface F5 (first main surface) side and the main surface F6 (second main surface) side of the mother glass sheet 51 at different temperatures. For example, the ambient temperature on the main surface F5 side is set to the temperature T20 (for example, 720 ° C), and the ambient temperature on the main surface F6 side is set to the temperature T21 (for example, 700 ° C). The temperature T20 is higher than the temperature T21. In step S3 (step S5), the heated mother glass sheet 51 is extended by the rotational force (pull force) of the cylinder 49 in the arrow direction 55 to shape the glass ribbon 1. As a result, the glass ribbon 1 is bent in one direction to two side edges 3.

As described above, since the main surface F5 side and the main surface F6 side of the mother glass plate 51 are heated while being heated at different temperatures, the glass ribbon 1 obtained in the step S3 is convex toward the main surface F5 side. bending. That is, the glass ribbon 1 is directly produced from the mother glass plate 51.

[Basic glass tape]

A method of manufacturing the base glass tape (base glass tape 37) described with reference to Fig. 4 will be described. Hereinafter, a method of manufacturing the redraw method will be described with reference to FIGS. 3A, 3B, 4, and 11. In step S1, the heater 47 is controlled to heat the main surface F5 and the main surface F6 of the mother glass plate 51 provided in the holding portion 45 at the same temperature (for example, 710 ° C). In step S3, the base glass ribbon is formed by extending the heated mother glass sheet 51, and is wound by the cylinder 49.

The main surface and the side of the base glass ribbon formed by the redraw method are turned into a Fire polished surface. As a result, the first main surface F1, the second main surface F2, and the side edges 3 of the glass ribbon 1 produced from the base glass tape are also flame-polished surfaces. In addition, the side of the base glass tape formed by the re-drawing method (Redraw method) has a base glass A convex curved surface protruding from the outside of the glass ribbon. As a result, the side 3 of the glass ribbon 1 made of the base glass tape also has a convex curved surface 4 that protrudes outward. These points are also the same for the glass ribbon 1 of the eighth embodiment.

Although the shape of the formed base glass tape is substantially flat without bending (including undulation), it is preferable to bend slightly in the bending step (S5).

(Embodiment 9)

The glass ribbon 1 according to the ninth embodiment of the present invention will be described with reference to Figs. 2 and 12A to 12D. As shown in Fig. 2, in the glass ribbon 1 of the first embodiment, the second main surface F2 is curved in one direction (direction CR1) so as to have one bottom BM up to two side edges 3, and the first main surface F1 is curved so as to be along the two side edges 3 and along the second main surface F2.

On the other hand, in the glass package 1 of the first to third examples, the second main surface F2 has a top TM and a bottom BM in a plurality of directions (direction) up to two side edges 3 . CR1 and direction CR2) are curved, and the first main surface F1 is curved so as to extend along the second main surface F2 up to the two side edges 3. That is, the glass ribbon 1 has an undulation. The undulation is a curvature in a plurality of directions, that is, the second main surface F2 is curved in a bidirectional manner so as to have a top TM and a bottom BM. In the present specification, in the cross-sectional view, the top TM indicates the apex of the convex second main surface F2. The top TM is formed along the side edges 3.

Fig. 12A is a cross-sectional view showing the glass ribbon 1 of the first example in the ninth embodiment. The glass ribbon 1 is bent in both directions (direction CR1 and direction CR2), and the second main surface F2 has one top TM and one bottom BM. The bottom BM is the bottom that is recessed in the direction CR1, and the top TM is the top that protrudes in the direction CR2. The center plane CF of the two side edges 3 is curved. The first main surface F1 is curved along the second main surface F2. One of the side edges 3 and one top TM of the glass tape 1 is in contact with the flat surface 7. That is, in the cross-sectional view, the glass ribbon 1 is in contact with the flat surface 7 at two contact points CP.

The glass ribbon 1 of the first example was in contact with each other in a cross-sectional view. That is, the glass ribbon 1 is in line contact with the glass sheet 5. Due to the relationship of the line contact, the contact area of the glass ribbon 1 with the glass sheet 5 is small compared to the case of the surface contact. As a result, the occurrence of optical contact can be suppressed, and the positioning operation of the glass package 1 on the glass plate 5 can be easily performed.

However, since the space 9 is biased toward the side of one of the side edges 3, and the space 9 is injected with liquid and temporarily fixed, the strength of the temporary fixing may be uneven. Therefore, it is preferable to form the glass ribbon 1 in such a manner that the space 9 is line symmetrical.

Fig. 12B is a cross-sectional view showing the glass ribbon 1 of the second example in the ninth embodiment. The glass ribbon 1 is bent in both directions (direction CR1 and direction CR2), and the second main surface F2 has one top TM and two bottom BM. The top TM is the top that protrudes in the direction CR2, and each bottom BM is the bottom that is recessed in the direction CR1.

The glass wrap 1 is curved in a line symmetrical manner with respect to a line passing through the center top TM and perpendicular to the flat surface 7. Therefore, the space 9 is line symmetrical. The center plane CF of the two side edges 3 is curved. The first main surface F1 is curved along the second main surface F2. The two side edges 3 and the central top TM of the glass ribbon 1 are in contact with the flat surface 7, and the two bottom BM are separated from the flat surface 7. That is, in the cross-sectional view, the glass ribbon 1 is in contact with the flat surface 7 at three contact points CP.

In the same manner as the glass ribbon 1 in the first example, the glass ribbon 1 in the second example can suppress the occurrence of optical contact by line contact. Further, since the glass ribbon 1 is formed in a line symmetry with respect to the space 9, it is possible to suppress unevenness in strength by temporary fixation of the liquid.

Fig. 12C is a cross-sectional view showing the glass ribbon 1 of the third example in the ninth embodiment. The structure of the glass ribbon 1 is the same as that of the glass ribbon 1 of the second example. However, the top TM of the second main surface F2 is away from the flat surface 7 and does not contact the flat surface 7. The two side edges 3 of the glass tape 1 are in contact with the flat surface 7. That is, in the cross-sectional view, the glass ribbon 1 is in contact with the flat surface 7 at two contact points CP.

The glass wrap 1 in the third example can suppress the generation of optical contact by line contact as in the case of the glass wrap 1 in the second example, and suppresses the strength of temporary fixation by the liquid by the line 9 in line symmetry. Not uniform. In addition, since the center top TM leaves the flat surface 7, the liquid is injected into the entire space 9. Therefore, unevenness in the strength of the temporary fixation can be further suppressed, and the bubble can be prevented from entering the space 9 into which the liquid has been injected.

As described with reference to FIGS. 12A to 12C, the glass ribbons 1 of the first to third examples of the ninth embodiment have undulations. However, the undulating form (the number of top TMs, whether the top TM has a contact flat surface 7, and the number of bottom BMs) is not limited to the undulating form of the glass tape 1 of the first to third examples.

The smaller the number of the top TM of the second main surface F2, the better. This can further improve the uniformity of the strength of the temporary fixation by the liquid injection, can further suppress the entry of the air bubbles, and can further improve the accuracy of the positioning of the glass ribbon 1.

Further, in the case where the top TM is in contact with the flat surface 7, the smaller the number of contact points CP, the better. For example, the number of contact points CP is preferably 3, and 2 is more preferable.

However, as in the glass ribbon 1 of Embodiment 1, it is more preferable to bend in one direction without undulation. That is, it is preferable that the number of the bottoms BM of the second main surface F2 is 1, and the number of the top TMs is zero. This can further improve the uniformity of the strength of the temporary fixation by the liquid injection, and can further suppress the entry of the air bubbles, and can further improve the accuracy of positioning of the glass ribbon 1.

The glass ribbon 1 in the first embodiment is not undulated, but is curved so that the first main surface F1 is along the second main surface F2. However, the glass ribbon 1 may not be curved so that the first main surface F1 is along the second main surface F2.

Fig. 12D is a cross-sectional view showing the glass ribbon 1 of the fourth example in the ninth embodiment. The glass tape 1 has a fleshy portion G at both end portions of the glass ribbon 1. The thickness of each of the thick portions G is larger than the thickness of the central portion of the glass ribbon 1. Further, the center surface CF of the two side edges 3 is curved. Further, in the central portion of the glass ribbon 1, the first main surface F1 is curved along the second main surface F2. Further, the glass ribbon 1 has one bottom BM similarly to the glass ribbon 1 in the first embodiment, and is in contact with the flat surface 7 at two contact points CP in a cross-sectional view. In the glass ribbon 1 of the fourth example, as in the glass ribbon 1 of the first embodiment, the occurrence of optical contact can be suppressed by line contact.

Next, the present invention will be specifically described based on examples, but the present invention is not limited to the following examples.

[Examples]

Embodiments of the present invention will be described with reference to Figs. 1, 3, A, 6, 7, and 13. Fig. 13 is a view for explaining the glass ribbon 1 in the embodiment. The horizontal axis and the vertical axis respectively indicate the position along the X axis and the height along the Z axis in the glass ribbon 1. The height is the height from the flat surface 7 to the second main surface F2 (curved surface).

The embodiment shows a glass tape 1 manufactured from the base glass tape 37 by the manufacturing apparatus 23 of the fourth embodiment. The base glass plate of the base glass package 37 is made of alkali-free glass (Day Type A of the Electric Glass Co., Ltd. The mother glass plate has a width of 50 mm and a thickness of 0.3 mm. The base glass tape 37 manufactured by the redraw method has a width of 5 mm and a thickness of 0.03 mm.

The conditions of the time, temperature, and load of the manufacturing steps are as follows. The period s0, the period s1, the period s2, and the period s3 are 1 minute, 1 minute, 3 minutes, and 3 minutes, respectively. The specified load P is 0.5 KN. The temperature T0, the temperature T1, the temperature T2, and the temperature T3 are room temperature, 630 ° C, 610 ° C, and 555 ° C, respectively.

From the above conditions, the glass wrap 1 which is bent in one direction as shown in Fig. 13 was produced. The bending rate R was 0.07%. Further, the glass ribbon 1 has a width W of 5 mm and a thickness of 0.03 mm. If an alkali-free glass is used, it is suitable as a sealing material for a device equipped with an element which deteriorates due to an alkaline component.

Further, borosilicate glass (TypeD manufactured by Nippon Electric Glass Co., Ltd.) was used as the mother glass plate except that the temperature T1, the temperature T2, and the temperature T3 were 150 ° C higher than those in the case of the alkali-free glass, respectively. When the glass ribbon 1 was produced under the same conditions as the alkali glass, the glass ribbon 1 having the same bending ratio R as that in the case of using the alkali-free glass was produced.

Further, the present invention is not limited to the above embodiments, and various aspects can be implemented within a range not exceeding the gist thereof. For example, the glass ribbon 1 described with reference to Figs. 1 to 13 can have the following characteristics.

(1) The material of the glass ribbon 1 is not particularly limited. For example, depending on the application, the material may be a glass that can be stretched and formed, such as silicate glass, alkali-free glass, soda glass, borosilicate glass, aluminosilicate glass, or quartz glass.

(2) The width W of the glass ribbon 1 is not particularly limited. For example, the width W is 25 mm or less, 20 mm or less, 15 mm or less, or 10 mm or less depending on the application.

(3) The ratio of the width W to the thickness of the glass ribbon 1 may be 25 to 5,000. Therefore, it is suitable for use in a gap material, a spacer material, a sealing material, etc.

(4) The surface roughness of the first main surface F1 and/or the second main surface F2 of the glass ribbon 1 is not particularly limited. For example, the first main surface F1 and/or the second main surface F2 can form a smooth surface that is in optical contact. For example, the center line average roughness RA is 0.5 nm or less, 0.3 nm or less, or 0.2 nm or less depending on the application.

(5) The first main surface F1 and/or the second main surface F2 of the glass ribbon 1 and/or the side edges 3 may be flame polished surfaces. When the first main surface F1 and/or the second main surface F2 are flame-polished surfaces, the adhesion to the glass sheet 5 is further improved, and adhesion is easy. In the case where the side 3 is a flame-polished surface, there is no crack, loss, crack, or the like on the side 3, and the glass wrap 1 can be effectively prevented from being broken from the side edge 3. As a result, the glass ribbon 1 can be bent with a large curvature.

(6) As shown in Fig. 3B, although the side 3 has a convex curved surface 4, the side 3 may be a flat surface. In addition, the side 3 can also be formed by a curved surface and a flat surface.

(7) The glass ribbon 1 may contain 0.01% by mass to 30% by mass of transition metal ions. The glass ribbon 1 can be efficiently heated by irradiating the glass ribbon 1 with light of a wavelength absorbable by the transition metal ions. As a result, the glass ribbon 1 temporarily fixed to the glass sheet 5 can be softened and bonded to the glass sheet 5.

(8) The surface of the glass ribbon 1 can be subjected to a film formation treatment. The glass ribbon 1 is irradiated with light having a wavelength which is a wavelength at which a film component formed on the surface can be absorbed, and the surface of the glass sheet 5 can be efficiently heated. As a result, the temporarily fixed glass ribbon 1 and the glass sheet 5 can be easily bonded.

(9) The glass package 1 may contain an alkali metal having a mass of 5% to 25% by mass. Therefore, the glass ribbon 1 and the glass sheet 5 can be bonded by anodic bonding.

(10) A glass ribbon 1 that is bent in one direction (for example, the fourth example of the first embodiment or the ninth embodiment) and a glass ribbon 1 having an undulation (for example, the first to third examples of the ninth embodiment) The number of preferred contact points CP is less than 5 points, more preferably less than 3 points, and most preferably 2 points.

(11) The method for producing a product according to the third embodiment is applied to a glass ribbon 1 that is bent in one direction to two sides (for example, the first example or the fourth example of the ninth embodiment). However, the product manufacturing method of the third embodiment can also be applied to the glass ribbon 1 bent to two sides. Therefore, for example, the product manufacturing method of the third embodiment can be applied to manufacture of a product including the glass ribbon 1 having undulations (for example, the first to third examples of the ninth embodiment) and the glass sheet 5 as components (last Product).

(12) In Fig. 12B, although the glass ribbon 1 is curved in a line symmetry with respect to a line passing through the center top TM and perpendicular to the flat surface 7, it is also possible to It is curved in an asymmetrical manner to the line perpendicular to the flat surface 7. Similarly, although the glass ribbon 1 of FIG. 1, FIG. 12C, and FIG. 12D is also curved in a line symmetry with respect to a line perpendicular to the flat surface 7, it may be relatively flat and flat. The vertical line of face 7 is curved in an asymmetrical manner.

The present invention can be applied to a field in which a glass ribbon is used as a gap material, a spacer material, a sealing material, or the like in a solar cell, an organic EL display, a specimen glass sheet, or the like.

1‧‧‧glass bag

3‧‧‧ side

5‧‧‧ glass plate

7‧‧‧flat surface

9‧‧‧ Space

D‧‧‧thickness

W‧‧‧Width

L‧‧‧ length

C‧‧‧ wiring

F1‧‧‧1st main surface (curved surface)

Claims (16)

A glass ribbon is a glass ribbon having a thickness D, a width W and a length L and satisfying D < W, and is curved with respect to the width direction. The glass ribbon of claim 1, which has two sides and is bent to the two sides. The glass tape of claim 2, which is bent in one direction to the two sides. The glass ribbon of claim 2, wherein the center faces of the two sides are curved. The glass ribbon of claim 2, wherein the side has a convex curved surface. The glass ribbon as described in claim 2, which is disposed on a flat surface and is disposed such that the two side edges abut against the flat surface to inject liquid into the glass The bending is performed by bending the bending rate R to the extent that the space between the flat surface and the flat surface causes a capillary phenomenon. The glass ribbon according to any one of the preceding claims, wherein the glass ribbon has a bending rate R of 0.001% or more and 1.0% or less, R = (H/W) × 100, H When the glass ribbon is placed such that the two side edges abut against the flat surface, the length of the perpendicular line from the bottom of the curved surface facing the flat surface to the flat surface is lowered. The glass ribbon according to any one of the preceding claims, wherein the glass ribbon has a first main surface and a second main surface opposite to the first main surface, the first main surface It is curved along the second main surface. The glass ribbon of any one of clauses 1 to 6, wherein W < L is satisfied. A method for manufacturing a glass ribbon comprising: a heating step of heating a mother glass sheet; and an extending step of extending the heated mother glass sheet to have a thickness Db, a width Wb, and a length Lb and satisfying Db<Wb a base glass tape; and a bending step of the base glass tape having two sides at both ends in the width direction Bend to the two sides in one direction. The method for manufacturing a glass ribbon according to claim 10, wherein the bending step comprises: a step of holding the base glass tape with a mold; and a temperature increasing step of coating the first glass with the base glass The ambient temperature on the main surface side and the ambient temperature on the second main surface side reach the first temperature and the second temperature in the first period, respectively, and the first main surface side and the second main surface side are performed at different temperature increase rates. a heating step of maintaining the ambient temperature on the first main surface side and the ambient temperature on the second main surface side in the first temperature and the second temperature in the second period; and the step of cooling The ambient temperature of the first main surface side and the ambient temperature of the second main surface side maintained at the second temperature are each maintained at a third temperature in the third period. The first main surface side and the second main surface side are quenched at different undercooling speeds, and the temperature increasing step, the holding step, and the quenching step are performed in a state where the base glass ribbon is caught by the mold. . The method of manufacturing a glass ribbon as described in claim 10, wherein the bending step comprises a step of holding the heating, the side of the base glass ribbon being heated while holding the base glass ribbon while holding the base glass ribbon. The method for manufacturing a glass ribbon according to claim 10, wherein the bending step comprises: holding the heating step, clamping the base glass ribbon with a mold while heating the base glass ribbon; and quenching step The first main surface side and the second main surface side of the base glass ribbon fed from the mold are quenched at different supercooling speeds. The method for producing a glass ribbon according to claim 10, wherein the bending step is performed in the extending step, the heating step comprising: the first main surface side and the second main surface side of the mother glass sheet The step of heating at different temperatures. A method for producing a product, which is a method for producing a product comprising the glass ribbon and the first glass sheet as an element according to any one of claims 1 to 9, which has the following steps: a step of disposing the glass ribbon on the first glass plate in such a manner that two side edges of the glass ribbon abut against the first glass sheet; and an injecting step of injecting liquid into the glass The space between the bag and the first glass plate. The method for producing a product according to claim 15, further comprising the step of disposing the second glass sheet on the glass ribbon, the glass ribbon functioning as a thickness defining member.