TWI593649B - Cutting method of composite board, glass plate cutting method - Google Patents

Description

Cutting method of composite plate, cutting method of glass plate

The present invention relates to a method for cutting a composite sheet, a method for cutting a glass sheet, and a cut sheet for a composite sheet.

A composite panel comprising a glass sheet and a resin film formed on the glass sheet is known. This composite sheet combines the chemical resistance and heat resistance of the glass sheet with the flexibility of the resin film, and this characteristic is sufficiently applied to the production of, for example, a display, a solar battery, or the like.

In recent years, as a method of cutting a composite panel, a method of using laser light has been proposed (for example, refer to Patent Document 1).

Moreover, as a method of cutting a glass plate, a method of locally heating a glass plate by laser light and forming a crack on a glass plate by thermal stress is known (for example, refer patent document 2).

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-501457

Patent Document 2: Japanese Patent Laid-Open Publication No. 2010-90009

When the thickness of the glass plate is thin, the crack formed in the glass plate penetrates the glass plate in the thickness direction.

As a result, when the crack is formed, the glass on both sides of the crack is not connected. The knot is so easy that the glass is easily deformed and the position of the crack is easily deviated from the desired position.

The present invention has been made in view of the above problems, and an object of the invention is to provide a method for cutting a composite sheet having a high cutting precision and a method for cutting a glass sheet having a high cutting precision.

In order to solve the above problems, an aspect of the present invention is a method for cutting a composite panel, which comprises a method of cutting a composite panel comprising a glass sheet having a thickness of 200 μm or less and a resin film formed on the glass sheet, and The method comprises the steps of: locally irradiating the glass plate of the composite plate with laser light, locally heating the glass plate at a temperature below a slow cooling point of the glass, and moving the laser light to an irradiation position of the glass plate; Moving the trajectory to extend the crack extending through the glass sheet in the thickness direction, and in the step, the resin film crosses the crack, connects the glass across the crack, and cuts the resin after the step membrane.

Moreover, another aspect of the present invention is a method for cutting a glass sheet, which is a method for cutting a glass sheet having a thickness of 200 μm or less, and comprising the steps of: comprising the glass sheet and forming on the glass sheet The glass plate of the composite film of the resin film partially irradiates the laser light, and locally heats the glass plate at a temperature lower than the slow cooling point of the glass, and moves the laser light to the irradiation position of the glass plate to move along the movement track. The crack propagates through the glass sheet in the thickness direction. In this step, the resin film crosses the crack and connects the glass on both sides of the crack.

According to the present invention, there is provided a method for cutting a composite sheet having a high cutting precision and a method for cutting a glass sheet having a high cutting precision.

10‧‧‧Composite board

12‧‧‧ glass plate

12a‧‧‧Laser illuminated surface

14‧‧‧ resin film

14a‧‧‧ The surface of the resin film 14 that is in contact with the glass plate 12

20‧‧‧Laser light

30‧‧‧ initial crack

31‧‧‧ crack

40‧‧‧Refrigerant

50‧‧‧ nozzle

111, 112‧‧‧ cut pieces

121, 122‧‧‧ glass

141, 142‧‧‧ resin film

143‧‧‧ Thermal Degradation Department

L, W‧‧‧ length

Fig. 1 is a first step showing a method of cutting a composite sheet according to a first embodiment of the present invention. Stereogram.

Fig. 2 is a perspective view showing a second step of the method for cutting a composite panel according to the first embodiment of the present invention.

Fig. 3 is an explanatory view showing the size of the laser light on the laser irradiation surface of the glass plate of Fig. 2.

Fig. 4 is a perspective view showing the state of the composite panel after the laser scanning of Fig. 2.

Fig. 5 is a perspective view showing the state of the resin film of Fig. 4.

Fig. 6 is a side view showing the state of the composite panel when the self-supporting table is removed after the laser scanning of Fig. 2.

Fig. 7 is a perspective view showing the state of the composite panel after the step of Fig. 6.

Fig. 8 is a side view showing a third step of the method for cutting a composite sheet according to the first embodiment of the present invention.

Fig. 9 is a perspective view showing a cut piece obtained after the third step of Fig. 8.

Fig. 10 is an explanatory view showing a method of cutting a glass sheet according to a second embodiment of the present invention.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the drawings, the same or corresponding reference numerals are given to the same or corresponding components, and the description is omitted.

[First Embodiment]

FIG. 1 to FIG. 9 are explanatory views of a method of cutting a composite sheet according to the first embodiment of the present invention.

As shown in FIG. 1, the composite panel 10 of the present invention comprises a glass sheet 12 and a resin film 14 formed on the glass sheet 12. The composite sheet 10 combines the chemical resistance and heat resistance of the glass sheet 12 with the flexibility of the resin film 14, and this characteristic is sufficiently applied to the production of, for example, a display, a solar battery, or the like.

The glass of the glass plate 12 can be various, and may be, for example, soda lime glass, alkali-free glass, or the like. Further, the method of forming the glass sheet 12 may be a conventional method, and may be, for example, a float method, a fusion method, a re-drawing method, or the like.

The average linear expansion coefficient (hereinafter, simply referred to as "average linear expansion coefficient") of the glass plate 12 at 0 ° C to 300 ° C is, for example, 10 × 10 ^-7 / ° C to 100 × 10 ^-7 / ° C, preferably 10 ×10 ^-7 /°C~50×10 ^-7 /°C.

The thickness of the glass plate 12 is 200 μm or less. When the thickness of the glass plate 12 is 200 μm or less, the glass plate 12 can be wound into a spiral shape to form a glass roll. When the thickness of the glass plate 12 is 200 μm or less, the crack 31 formed on the glass plate 12 by the irradiation of the laser light 20 shown in FIG. 2 penetrates the glass plate 12 in the thickness direction. The thickness of the glass plate 12 is preferably 150 μm or less, more preferably 100 μm or less, and still more preferably 50 μm or less. Further, the thickness of the glass plate 12 is preferably 10 μm or more.

The glass plate 12 may also be a surface treated person beforehand to improve the adhesion between the glass and the resin. Examples of the surface treatment include primer treatment, ozone treatment, plasma etching treatment, and the like. As the primer, a decane coupling agent can be exemplified. Examples of the decane coupling agent include amino decanes, epoxy decanes, alkoxy decanes, and decazanes.

The method of forming the resin film 14 on the glass plate 12 is not particularly limited, and for example, it may be a method of applying a liquid resin composition to the glass plate 12 to cure the resin composition, and attaching the resin film to the glass plate. Any of the methods on the 12th. The resin film may be a surface treated person in advance to improve the adhesion between the glass and the resin, and for example, an adhesive may be applied to the surface in contact with the glass. In this case, the resin film 14 contains a resin film as a base material and an adhesive. Examples of the adhesive include an isocyanate type, a polyurethane type, a polyester type, an acrylic type, a polyethyleneimine type, a rubber type, a decane coupling agent, a titanium coupling agent, a polyfluorene type, and a polyfluorene type. Amine polyoxane and the like.

The resin film 14 is preferably formed on at least a portion of the cut position of the glass sheet 12 (that is, the movement locus of the irradiation position of the laser light 20 (see FIG. 2) in the glass sheet 12, and is formed on the glass sheet 12. At least the cutting end position is preferably formed over the entire cutting position of the glass sheet 12.

The details of the resin film 14 will be described below, which serves as follows: The crack 31 formed on the glass plate 12 by the irradiation of the light 20 is connected to the glass 121 and 122 on both sides of the crack 31. Therefore, it is preferable that at least the region from the crack 31 (i.e., the center line of the movement locus of the irradiation position of the laser light on the glass plate 12) within 2.5 mm in both directions orthogonal to the crack 31 is made of resin. The film 14 is covered. Further, it is more preferable that at least the region within 5 mm from the crack 31 in the two directions orthogonal to the crack 31 is covered with the resin film 14.

The resin film 14 may be larger or smaller than the glass plate 12. It is particularly preferable that the resin film 14 has the same size as the glass plate 12.

The resin film 14 may be formed of any one of a thermoplastic resin and a thermosetting resin, but is preferably formed of a thermosetting resin so as not to partially crack the resin film 14 when the glass plate 12 is locally heated by the laser light 20 shown in FIG. Opened and cut off. As the thermosetting resin, for example, polyimide (PI), epoxy resin (EP, epoxy), or the like can be used. As the thermoplastic resin, for example, PA, polyamide, polyamide-imide, polyetheretherketone (PEEK), polyethylene terephthalate (PET) can be used. , polyethylene terephthalate), polyethylene naphthalate (PEN), polyether sulphide (PES), cyclic polyolefin (COP, Cyclic Olefin Copolymer), polycarbonate (PC, polycarbonate), poly Vinyl chloride (PVC), polyethylene (PE), polypropylene (PP), acrylic polymer (PMMA, Polymethyl methacrylate), urethane (PU), and the like. Further, the resin film 14 may be formed of a photocurable resin.

Moreover, the resin film 14 may contain an inorganic filler in order to improve heat resistance, strength, moldability, and the like.

The resin film 14 is preferably formed on one surface of the glass plate 12, and is preferably formed on a surface 12a (hereinafter referred to as a laser irradiation surface 12a of the glass plate 12) on which the laser light 20 of the glass plate 12 is incident. The opposite side.

The thickness of the resin film 14 depends on the kind of the resin film 14, but is, for example, 1 μm to 200 μm, more preferably 1 μm to 100 μm, still more preferably 1 μm to 50 μm. If the thickness of the resin film 14 is too thick, the resin film 14 cannot be cut by bending the resin film 14. Moreover, when the thickness of the resin film 14 is too thin, when the glass plate 12 is partially heated by the laser light 20, the resin film 14 is cracked and cut. In the case where the resin film 14 contains a substrate and an adhesive, the thickness of the resin film 14 is the total thickness of the substrate and the adhesive.

The peeling strength of the resin film 14 was measured by a 180° peeling test (JIS K6854-2) in which the resin film 14 was peeled off from the glass plate 12 while the glass plate 12 was kept flat. The resin film 14 can suppress deformation of the glass sheet 12 at the time of irradiation of the laser light 20, and the peeling strength of the resin film 14 is, for example, more than 0 N/25 mm, preferably 0.01 N/25 mm or more, and more preferably 0.1 N/25 mm or more.

The cutting method of the composite sheet includes, for example, a first step of forming the initial crack 30 in the glass sheet 12 (see FIG. 1), a second step (see FIG. 2) of forming the crack 31 penetrating the glass sheet 12 in the thickness direction, and cutting. The third step of breaking the resin film 14 (see Fig. 8).

In the first step, as shown in FIG. 1, an initial crack 30 is formed in the glass sheet 12. The initial crack 30 is formed at the cutting start position of the glass sheet 12, and may be formed at the end of the glass sheet 12. The initial crack 30 can be formed by a wheel cutter, a cutting tool, a file, a laser, or the like.

The first step may be performed before the resin film 14 is formed on the glass plate 12, or may be performed after the resin film 14 is formed on the glass plate 12. In the latter case, when the initial crack 30 is formed, the glass sheet 12 is reinforced by the resin film 14, so that the damage of the glass sheet 12 can be suppressed.

The first step may be any step or no first step. For example, when the end surface of the glass plate 12 is ground by a grindstone or the like, microcracks formed by polishing can be used as initial cracks.

In the second step, as shown in FIG. 2, the glass plate 12 of the composite panel 10 is partially irradiated with the laser light 20, and the glass plate 12 is locally heated at a temperature below the slow cooling point of the glass, and the laser light on the glass plate 12 is made. The illumination position of 20 moves.

In order to move the irradiation position of the laser beam 20 on the glass plate 12, the glass plate 12 can be moved, and the light source of the laser light 20 can be moved or both can be moved. The movement of the glass sheet 12 is performed, for example, by the movement of the platform supporting the glass sheet 12 or the rotation of the conveying roller that transports the glass sheet 12. The conveying roller rotates centering on its center line. Instead of the movement of the glass sheet 12, the rotation of the glass sheet 12 can also be performed. The rotation of the glass sheet 12 is performed by the rotation of the platform supporting the glass sheet 12. The platform is rotated about a rotation axis that protrudes from the platform. The rotation of the glass plate 12 is particularly effective when the movement trajectory of the irradiation position of the laser light 20 on the glass plate 12 is curved. Further, in order to move the irradiation position of the laser beam 20 on the glass plate 12, the galvanometer mirror that reflects the laser light from the light source toward the glass plate 12 may be rotated.

In addition, if the glass is heated at a temperature exceeding the slow cooling point of the glass, the thermal stress is relieved due to the viscous flow of the glass. Further, the temperature at which heating is performed is preferably as high as possible below the slow cooling point. That is, the temperature range of heating is preferably (glass slow cooling point - 200 ° C) or more and the glass slow cooling point or less, more preferably (glass slow cooling point - 100 ° C) or more and the glass slow cooling point. the following.

In the present embodiment, the glass sheet 12 is locally heated at a temperature lower than the slow cooling point of the glass, so that thermal stress is generated. A compressive stress is generated at the irradiation position of the laser light 20, and due to the reaction, tensile stress is generated in the vicinity of the irradiation position of the laser light 20. The glass plate 12 is cut by the tensile stress generated to form a crack 31. The crack 31 penetrates the glass sheet 12 in the thickness direction. The crack 31 follows the irradiation position of the laser light 20 and extends along the movement locus of the irradiation position of the laser light 20. The moving track may be linear or curved, and may also include two parts of a linear portion and a curved portion. The crack 31 can also be formed by starting the initial crack 30. Here, the term "rear" means a direction opposite to the direction in which the crack 31 extends, and indicates a direction opposite to the moving direction of the irradiation position of the laser light 20 on the glass plate 12.

Moreover, in general, if the glass is partially melted, it is cooled in the melted portion. When solidified, heat shrinkage is about to occur. At this time, the heat shrinkage of the melted portion is hindered by the peripheral portion thereof, thereby randomly forming microcracks.

In the present embodiment, the glass sheet 12 is locally heated at a temperature lower than the slow cooling point of the glass, so that the glass does not melt. Therefore, a smooth glass cut surface is obtained, and a glass cut surface having a high strength is obtained.

The laser light 20 is emitted from the light source, and is collected by a collecting lens or the like, and then incident on the laser irradiation surface 12a of the glass plate 12. The laser light 20 can be incident perpendicularly to the laser irradiation surface 12a of the glass plate 12, and can also be incident obliquely.

As the light source of the laser light 20, for example, a CO ₂ laser (wavelength 10600 nm), a mid-infrared optical parametric oscillator (wavelength 2600 nm to 3450 nm), and an Erbium-doped garnet (Er: YAG, Erbium: Yttrium Aluminum Garnet) can be used. Shot (wavelength 2940nm), yttrium aluminum garnet laser (Ho: YAG, holmium: Yttrium Aluminum Garnet) (wavelength 2080nm), ytterbium (Yb) fiber laser (wavelength 1000nm~1100nm), ytterbium (Yb) disc type Laser (wavelength 1000nm~1100nm), erbium-doped yttrium aluminum garnet (Nb: YAG, neodymium: Yttrium Aluminum Garnet) (wavelength 1064nm), high output semiconductor laser (wavelength 808nm~980nm) green laser (wavelength 532 nm), ultraviolet (UV (Ultraviolet) laser (wavelength 355 nm), and the like.

The light source of the laser light 20 may be any one of a CW (Continue Wave) laser that continuously oscillates the laser light and a pulsed laser that intermittently oscillates the laser light.

The shape (spot shape) of the laser light 20 on the laser irradiation surface 12a of the glass plate 12 is appropriately set in accordance with the type of the light source of the laser light 20 or the like. The reason for this is that the light absorption rate of the glass plate 12 changes due to the wavelength of the laser light 20. For example, when the light source is a CO ₂ laser, the wavelength of the laser light 20 is long, and most of the laser light 20 is absorbed as heat near the laser irradiation surface 12a of the glass plate 12. Therefore, when the light source is a CO ₂ laser, the shape of the laser light 20 on the laser irradiation surface 12a of the glass plate 12 may be a shape that is relatively elongated in the moving direction of the irradiation position of the laser light 20. When the irradiation position of the laser beam 20 is moved, the cutting position of the glass sheet 12 can be heated for a long period of time, and the time for transferring heat from the laser irradiation surface 12a of the glass sheet 12 to the inside can be ensured. Since the inside of the glass plate 12 is heated, the crack 31 which penetrates the glass plate 12 in the thickness direction can be formed.

When the thickness of the glass plate 12 is 200 μm or less, the time for transferring heat from the laser irradiation surface 12a of the glass plate 12 to the inside is short, and thus the shape of the laser light 20 on the laser irradiation surface 12a of the glass plate 12 is, for example, It can also be round or rectangular. In the case of a circle, when the movement locus of the irradiation position of the laser light 20 includes a curved portion, the width of the curved portion of the movement locus becomes fixed, so that the crack 31 is difficult to deviate from the movement locus. In the case of an ellipse or a rectangle, in order to fix the width of the curved portion of the movement trajectory while moving the irradiation position of the laser light 20, the laser light 20 may be rotated around the optical axis. For example, the light source of the laser light 20 can be rotated about the optical axis.

The moving direction length L (see FIG. 3) of the laser light 20 on the laser irradiation surface 12a of the glass plate 12 is not particularly limited, but is, for example, 0.1 mm to 60 mm, preferably 1 mm to 30 mm. Further, the length W (see FIG. 3) of the movement orthogonal direction of the laser light 20 on the laser irradiation surface 12a of the glass plate 12 is not particularly limited, but is, for example, 0.01 mm to 10 mm, preferably 0.1 mm to 5 mm.

In the second step, as shown in FIG. 2, the glass plate 12 can be partially cooled by the refrigerant 40, and the supply position of the refrigerant 40 on the glass plate 12 can be moved in conjunction with the irradiation position of the laser light 20 on the glass plate 12. The supply position of the refrigerant 40 may be near the rear of the irradiation position of the laser light 20. An irritating temperature gradient is generated after the irradiation position of the laser light 20, so that the distance between the irradiation position of the laser light 20 and the position of the front end of the crack 31 becomes short.

The refrigerant 40 may be either a gas (for example, compressed air at room temperature) or a liquid (for example, water at room temperature), or both.

The nozzle 50 is formed in a tubular shape as shown in FIG. 2, for example, and discharges the refrigerant 40 toward the glass plate 12.

In order to move the supply position of the refrigerant 40 on the glass plate 12, the glass plate 12 can be moved, and the nozzle 50 can be moved or both can be moved.

In the second step of the present embodiment, as shown in FIG. 2, when the crack 31 is formed in the glass sheet 12, the resin film 14 is not cut. Therefore, the resin film 14 bridges the cracks 31 and connects the glass 121 and 122 on both sides of the crack 31. Since the glass 121 and 122 on both sides of the crack 31 are connected by the resin film 14, when the crack 31 is formed, deformation of the glass can be suppressed, and the position of the crack 31 is hard to deviate from the desired position. Therefore, the cutting accuracy of the glass plate 12 becomes good. This effect is remarkable when the resin film 14 is integrally formed over the cutting position of the glass sheet 12 (that is, the movement locus of the irradiation position of the laser light 20 on the glass plate 12).

In the second step, as shown in FIG. 2, the laser light 20 may be irradiated to the opposite side of the glass plate 12 from the resin film 14 side. The laser light 20 is attenuated corresponding to the light absorptivity of the glass plate 12 during the penetration of the glass plate 12, and thereafter, is incident on the resin film 14. Therefore, the intensity of the laser light 20 incident on the resin film 14 is low, and the resin film 14 is hard to soften and melt. If one of the resin films 14 is partially melted, the molten portion is torn due to surface tension.

In the second step, as shown in FIG. 2, the linear heat-degraded portion 143 is formed on the resin film 14 along the movement path by moving the irradiation position of the laser light 20 on the glass plate 12. Here, "thermal deterioration" means carbonization, foaming, or the like due to heat, and the tensile strength (MPa) of the resin film 14 before laser irradiation is used as a reference, and the stretching of the resin film 14 after laser irradiation is performed. The strength is reduced by 0.01% or more. In the tensile strength test, a tensile stress in a direction orthogonal to the linear heat-degraded portion 143 is applied to the resin film 14.

Since the linear heat-degraded portion 143 is formed on the resin film 14, the resin film 14 is easily bent around the heat-degraded portion 143. The tensile strength of the resin film 14 after the laser irradiation is preferably 0.1% or more, more preferably 1% or more, based on the tensile strength of the resin film 14 before the laser irradiation.

The thermally deteriorated portion 143 is formed on the surface 14a of the resin film 14 that is in contact with the glass sheet 12 (see FIG. 5). The thermally deteriorated portion 143 may not penetrate or penetrate the resin film 14 in the thickness direction as shown in FIG. 5 . Further, in the thermally deteriorated portion 143, a groove line (scribe line) that is in contact with the crack 31 of the glass sheet 12 may be formed.

In addition, when the irradiation position of the laser light 20 on the glass plate 12 is moved, it is difficult to form a crack penetrating the glass plate 12 in the thickness direction as shown in FIG. 4 at the end portion of the glass plate 12 which is the end portion of the movement track. 31. The reason for this is that the crack 31 is basically stretched due to the tensile stress generated after the irradiation position of the laser light 20. Furthermore, the tensile stress is considered to be tensile stress caused by (i) the reaction of the compressive stress generated by the irradiation of the laser light; (ii) the stretching caused by the thermal expansion of the resin generated by the heating of the laser light. The stress; and preferably (iii) is produced by the interaction of tensile stress caused by the supply of the refrigerant. Further, it is considered that the cutting accuracy is increased by the interaction.

When the front end of the crack 31 is close to the end of the glass sheet 12, the crack 31 is stretched by a small external force, and the glass sheet 12 is broken. Therefore, when the composite panel 10 is detached from the support table after the irradiation of the laser light 20, if the composite panel 10 is slightly deflected, the end portion of the glass sheet 12 is cut by the stress.

When the composite sheet 10 is slightly deflected, as shown in FIG. 6, the resin film 14 is bent around the linear heat-degraded portion 143, and the end portion of the glass sheet 12 is bent corresponding to the deformation of the resin film 14. fold. Since the linear heat deterioration portion 143 is formed along the movement locus of the irradiation position of the laser light 20, the end portion of the glass plate 12 is bent around the movement locus. Therefore, the end portion of the glass plate 12 can be cut along the movement locus of the laser light 20, so that the control of the cutting position can be performed. This effect is remarkable when the heat-degraded portion 143 is formed at the end portion of the resin film 14 corresponding to the cutting end position of the glass sheet 12.

The heat-degraded portion 143 is preferably formed at the end of the resin film 14 (the laser irradiation start point) to the end (the laser irradiation end point). The resin film 14 is easily bent around the thermally deteriorated portion 143.

Further, in the present embodiment, the step of cutting the end portion of the glass sheet 12 which is the end portion of the movement locus of the irradiation position of the laser light 20 is performed after the irradiation of the laser beam 20, and the composite board 10 is detached from the support table. This can be done, but it can also be performed after the composite panel 10 is removed from the support table.

In the third step, the resin film 14 is cut as shown in Fig. 8, and a plurality of resin films 141 and 142 are obtained. Thereby, a plurality of cut pieces 111 and 112 are obtained. A cut piece 111 includes a glass plate 121, and a resin film 141 combined with the glass plate 121. Further, the other cut piece 112 includes a glass plate 122 and a resin film 142 bonded to the glass plate 122.

In the present embodiment, as shown in FIGS. 4 to 7, a linear heat-degraded portion 143 is formed in the resin film 14 along the movement locus of the irradiation position of the laser light 20 on the glass plate 12. Therefore, as shown in FIG. 8, the resin film 14 can be bent (cut) along the thermally deteriorated portion 143 by bending the resin film 14 around the linear heat-degraded portion 143. When the resin film 14 is bent around the linear heat-degraded portion 143, it is preferable to bend the resin film 14 so as not to scratch the glass cut surfaces.

The linear heat deterioration portion 143 is formed along the movement locus of the irradiation position of the laser light 20. Therefore, as shown in FIG. 9, the cut surface of the glass plate 121 obtained by cutting is flush with the cut surface of the resin film 141 obtained by cutting. Similarly, the cut surface of the glass plate 122 obtained by cutting is flush with the cut surface of the resin film 142 obtained by cutting. The glass plates 121 and 122 are less likely to be scratched than the cut surface of the resin film as compared with the case where the cut surface of the resin film is recessed, and the cut pieces 111 and 112 are easily stored.

In the third step of the present embodiment, the resin film 14 is cut by bending the resin film 14, but the method of cutting the resin film 14 is not particularly limited. For example, as a method of cutting the resin film in which the cut surface of the resin film is flush with the cut surface of the glass sheet, a method of tearing the resin film along the linear heat-degraded portion and using the heat of the cutter along the line may be used. A method of cutting a resin film by a deteriorated portion. Moreover, although the cut surface of the resin film is somewhat recessed compared to the cut surface of the glass plate, as a method of cutting the resin film 14, a method of partially vaporizing the resin film by laser may be used.

[Second Embodiment]

The above embodiment relates to a method of cutting the composite sheet 10 including the glass sheet 12 and the resin film 14.

On the other hand, this embodiment relates to a method of cutting the glass sheet 12. The cutting method of the glass plate 12 can include the steps of FIGS. 1 to 7 in the same manner as the cutting method of the composite plate 10. These steps are the same steps, and the description is omitted.

Fig. 10 is an explanatory view showing a method of cutting a glass sheet according to a second embodiment of the present invention, and shows a step of performing the steps following the step of Fig. 7.

As shown in FIG. 10, the cutting method of the glass plate 12 includes the step of peeling the glass plate 12 and the resin film 14. When the glass plate 12 and the resin film 14 are peeled off, in order to avoid damage of the glass plate 12 at the time of peeling, the peeling strength of the resin film 14 is, for example, 3 N/25 mm or less, preferably 1 N/25 mm or less.

The peeling method of the glass plate 12 and the resin film 14 is not specifically limited, For example, the following process may be performed, and the thin blade is inserted in the interface of the glass plate 12 and the resin film 14, and the peeling origin is prepared. The resin film 14 is sequentially flexed and deformed from the peeling starting point. At the time of peeling, the damage of the glass plate 12 can be reduced by holding the glass plate 12 flat.

When the glass plate 12 and the resin film 14 are peeled off, it is preferable not to cut the resin film 14. The peeling of the plurality of glasses 121 and 122 and the resin film 14 can be performed once.

Further, the step of peeling off the glass plate 12 and the resin film 14 may be performed after the resin film 14 is cut, and may be carried out, for example, in the step of FIG.

The method of cutting the glass sheet may further include the step of forming the resin film 14 on the glass sheet 12.

Example

In the following examples and comparative examples, a glass plate of 150 mm square (thickness: 100 μm, average linear expansion coefficient: 38 × 10 ^-7 / ° C, alkali-free glass manufactured by Asahi Glass Co., Ltd., trade name: AN100) was used unless otherwise specified. As a glass plate.

[Example 1]

In Example 1, after the surface of the glass sheet on which the resin film was formed was subjected to surface treatment, a polyimide film (150 mm square, thickness: 5 μm) was formed as a resin film. The surface treatment of the glass plate was carried out by coating a propyl propyl trimethoxy decane with a spin coater. Polyimine film system The surface of the glass plate was formed by coating a polyimide varnish (H851D manufactured by Arakawa Chemical Co., Ltd., H851D) with a spin coater, and heat-treating at 250 ° C for 30 minutes.

In the first embodiment, the produced composite sheet including the glass plate and the polyimide film was cut by the method shown in Figs. 1 to 9 .

First, the glass plate is cut. The initial cracks were formed on one of the four sides of the rectangular glass plate at a pitch of 20 mm. The composite panel was placed on a support table with the polyimide film facing downward. The laser light was locally irradiated to the glass plate from a CO ₂ laser (wavelength 10600 nm, output 39 W). The laser scanning speed was set to 130 mm/sec. The irradiation position of the laser light on the glass plate is moved from the position where each of the initial cracks is formed to the other side of the initial crack to the other side parallel to the one side. The movement trajectory is set to be linear. Further, the mist droplets as a refrigerant are locally supplied from the nozzle to the glass sheet. The supply position of the refrigerant is placed in the vicinity of the irradiation position of the laser light, and is moved in conjunction with the irradiation position of the laser light.

As a result, eight cracks were formed on the glass plate along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass plate in the thickness direction, and is not formed at the end portion of the movement locus of the irradiation position of the laser light. Further, along the entire movement locus of the irradiation position of the laser light, a linear heat-degraded portion is formed on the polyimide film. The polyimide film crosses the crack and joins the glass on both sides of the crack.

Thereafter, when the composite sheet is detached from the support table, the polyimide film is slightly bent and deformed around the linear heat-degraded portion. The end of the glass sheet is bent corresponding to the deformation to cut the end of the glass sheet. In this way, the glass plate is cut.

Then, the polyimide film is bent around the linear heat-degraded portion, and the polyimide film is cut along the heat-degraded portion. The linear heat deterioration portion is formed along the entire movement locus of the irradiation position of the laser light on the glass plate. Therefore, the cut surface of the resin film and the cut surface of the glass plate are substantially flush with each other.

In this way, the composite panel is severed. The cutting precision of the composite panel is the deviation width between the actual cutting position on the glass plate and the linear target cutting position (hereinafter, referred to as The "offset width of the cut on the glass plate" was evaluated. The evaluation system is performed by dividing the end portion of the movement trajectory of the irradiation position of the laser light and other portions.

In the first embodiment, the end portion of the moving trajectory of the irradiation position of the laser light and the other portions are the maximum deviation width of the cutting on the glass plate of 0 mm.

[Embodiment 2]

Example 2 was attached to a polyimide film (150 mm square, thickness 38 μm, manufactured by Arakawa Chemical Co., Ltd., trade name Pomiran) with a polyamidide polyoxyl adhesive (thickness 10 μm, manufactured by Arakawa Chemical Co., Ltd., trade name H802). , a laminated resin film is produced. The adhesive side of the produced laminated resin film was attached to a glass plate to prepare a composite sheet.

Next, in the same manner as in the first embodiment, the glass plate was partially irradiated with the laser light, and the irradiation position of the laser light was moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, eight cracks were formed on the glass sheet along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass plate in the thickness direction and is not formed at the end portion of the movement locus of the irradiation position of the laser light. Further, the laminated resin film forms a linear heat-degraded portion along the entire movement trajectory of the irradiation position of the laser light. The laminated resin film crosses the crack and connects the glass on both sides of the crack.

Then, when the composite sheet is detached from the support table, the laminated resin film is slightly bent and deformed around the linear heat-degraded portion. The end of the glass plate is slightly bent corresponding to the deformation, thereby cutting the end of the glass plate. In this way, the glass plate is cut.

Then, the laminated resin film is bent around the linear heat-degraded portion, and the laminated resin film is cut along the thermally deteriorated portion. The linear heat deterioration portion is formed along the entire movement locus of the irradiation position of the laser light on the glass plate. Therefore, the cut surface of the laminated resin film and the cut surface of the glass plate are substantially flush with each other.

In this way, the composite panel is severed. The maximum deviation width of the cut on the glass plate at the end portion of the moving track of the laser light irradiation position and the other portions It is 0mm.

[Example 3]

Example 3 is a laminated resin film (manufactured by Teraoka Seisakusho Co., Ltd., trade name 635F) containing a polyethylene naphthalate (PEN) film (150 mm square, thickness 50 μm) and an acrylic adhesive (thickness: 30 μm) as a substrate. . The adhesive side of the prepared laminated resin film was attached to a glass plate to prepare a composite sheet.

Next, in the same manner as in the first embodiment, the glass plate was partially irradiated with the laser light, and the irradiation position of the laser light was moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, eight cracks were formed on the glass sheet along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass sheet in the thickness direction and is not formed on the end portion of the movement locus of the irradiation position of the laser light. Further, the laminated resin film forms a linear heat-degraded portion along the entire movement trajectory of the irradiation position of the laser light. The laminated resin film crosses the crack and connects the glass on both sides of the crack.

Then, when the composite sheet is detached from the support table, the laminated resin film is slightly bent and deformed around the linear heat-degraded portion. The end of the glass sheet is bent corresponding to the deformation to cut the end of the glass sheet. In this way, the glass plate is cut.

Then, the laminated resin film is bent around the linear heat-degraded portion, and the laminated resin film is cut (cut) along the thermally deteriorated portion. Since the linear heat-degraded portion is formed along the entire movement locus of the irradiation position of the laser light on the glass plate, the cut surface of the laminated resin film and the cut surface of the glass plate are substantially flush with each other.

In this way, the composite panel is severed. The maximum deviation width of the cut on the glass plate is 0 mm at the end portion of the moving track of the laser light irradiation position and the other portions.

[Example 4]

Example 4 is to prepare a cyclic polyolefin (COP) film (150 mm square, thickness 50) Mm, manufactured by ZEON, trade name ZF14). The prepared COP film was activated by corona discharge, and bonded to a glass plate by heating to obtain a composite sheet.

Next, in the same manner as in the first embodiment, the glass plate was partially irradiated with the laser light, and the irradiation position of the laser light was moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, eight cracks were formed on the glass sheet along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass plate in the thickness direction and is not formed at the end portion of the movement locus of the irradiation position of the laser light. Further, along the entire movement locus of the irradiation position of the laser light, a linear heat-degraded portion is formed in the COP film. The COP film crosses the crack and joins the glass across the sides of the crack.

Then, when the composite plate is detached from the support table, the COP film is slightly bent and deformed around the linear heat-degraded portion. The end of the glass sheet is bent corresponding to the deformation to cut the end of the glass sheet. In this way, the glass plate is cut.

Then, the COP film is bent around the linear heat-degraded portion, and the COP film is cut (cut) along the thermally deteriorated portion. Since the linear heat deterioration portion is formed along the entire movement locus of the irradiation position of the laser light on the glass plate, the cut surface of the COP film and the cut surface of the glass plate are substantially flush with each other.

In this way, the composite panel is severed. The maximum deviation width of the cut on the glass plate is 0 mm at the end portion of the moving track of the laser light irradiation position and the other portions.

[Example 5]

Example 5 was prepared by laminating a resin film comprising a polyethylene terephthalate (PET) film (thickness: 125 μm) as a substrate and an acrylic adhesive (thickness: 16 μm) (150 mm square, manufactured by SOMAR, trade name Somatac PS) -250WA). The adhesive side of the prepared laminated resin film was attached to a glass plate to prepare a composite sheet.

Next, in the same manner as in the first embodiment, the glass plate is partially irradiated with laser light, and the laser light is applied thereto. The position of the laser light is moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, eight cracks were formed on the glass sheet along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass plate in the thickness direction and is not formed at the end portion of the movement locus of the irradiation position of the laser light. Further, the laminated resin film forms a linear heat-degraded portion along the entire movement trajectory of the irradiation position of the laser light. The laminated resin film crosses the crack and connects the glass on both sides of the crack.

Then, when the composite sheet is detached from the support table, the laminated resin film is slightly bent and deformed around the linear heat-degraded portion. The end of the glass sheet is bent corresponding to the deformation to cut the end of the glass sheet. In this way, the glass plate is cut.

Then, a thin blade is inserted into the interface between the glass plate and the laminated resin film to form a peeling starting point, and while the glass plate 12 is kept flat, the laminated resin film is sequentially flexed and deformed from the peeling starting point, and a plurality of glass veneers are short. Strip stripped at one time. The peel strength was 0.11 N/25 mm.

In this way, the glass plate is cut. The maximum deviation width of the cut on the glass plate is 0 mm at the end portion of the moving track of the laser light irradiation position and the other portions.

[Embodiment 6]

In Example 6, a laminated resin film (150 mm square, manufactured by 3M Company, trade name No. 7414) containing a polyimide film (thickness: 25 μm) as a substrate and an acrylic adhesive (thickness: 22 μm) was prepared. The adhesive side of the prepared laminated resin film was attached to a glass plate to prepare a composite sheet.

Next, in the same manner as in the first embodiment, the glass plate was partially irradiated with the laser light, and the irradiation position of the laser light was moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, the moving rail along the irradiation position of the laser light is taken as the starting point of the initial crack. Traces form 8 cracks on the glass sheet. Each of the cracks penetrates the glass plate in the thickness direction and is not formed at the end portion of the movement locus of the irradiation position of the laser light. Further, the laminated resin film forms a linear heat-degraded portion along the entire movement trajectory of the irradiation position of the laser light. In the laminated resin film, the laminated resin film is slightly bent and deformed around the linear heat-degraded portion when the composite plate is detached from the support table. The end of the glass sheet is bent corresponding to the deformation to cut the end of the glass sheet. In this way, the glass plate is cut.

Then, a thin blade is inserted into the interface between the glass plate and the laminated resin film to form a peeling starting point, while the glass plate is kept flat, and the laminated resin film is sequentially flexed and deformed from the peeling starting point, and a plurality of glass veneers are short. Disposable at one time. The peel strength was 0.69 N/25 mm.

In this way, the glass plate is cut. The maximum deviation width of the cut on the glass plate is 0 mm at the end portion of the moving track of the laser light irradiation position and the other portions.

[Comparative Example 1]

In Comparative Example 1, the cutting of a 150 mm square glass plate to which a resin film was not attached was performed. Specifically, in the same manner as in the first embodiment, the glass plate is partially irradiated with the laser light, and the irradiation position of the laser light is moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, eight cracks were formed on the glass sheet along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass plate in the thickness direction and is not formed at the end portion of the movement locus of the irradiation position of the laser light.

Thereafter, when the glass plate is removed from the support table, the glass plate is deflected, and due to the stress thereof, the crack extends in an unexpected direction.

In Comparative Example 1, the end portion of the moving trajectory of the irradiation position of the laser light on the glass plate was cut to have a maximum deviation width of 1 mm to 3 mm. Also, the laser light on the glass plate In the portion other than the end portion of the movement locus of the irradiation position, the maximum deviation width of the cutting is about 1 mm.

[Comparative Example 2]

In Comparative Example 2, a composite sheet was produced in the same manner as in Example 1 except that the film thickness of the polyimide film was 0.5 μm.

Next, in the same manner as in the first embodiment, the glass plate was partially irradiated with the laser light, and the irradiation position of the laser light was moved. Further, in the same manner as in the first embodiment, the refrigerant is partially supplied to the glass sheet, and the supply position of the refrigerant is moved.

As a result, eight cracks were formed on the glass sheet along the movement trajectory of the irradiation position of the laser light with the initial crack as a starting point. Each of the cracks penetrates the glass plate in the thickness direction and is not formed at the end portion of the movement locus of the irradiation position of the laser light. On the other hand, the polyimide film is cut along the entire movement locus of the irradiation position of the laser light.

Thereafter, when the composite panel is removed from the support table, the glass sheet is deflected and the crack is stretched in an unexpected direction due to the stress. In this way, the composite panel is severed.

The maximum deviation width of the end portion of the moving track in the irradiation position of the laser light on the glass plate is 1 mm to 3 mm. Further, the maximum deviation width of the portion other than the end portion in the movement locus of the irradiation position of the laser light on the glass plate is about 1 mm.

[to sum up]

The results of Examples 1 to 3 and Comparative Examples 1 and 2 are summarized in Tables 1 to 3.

The following cases are clarified according to Tables 1 to 3. When performing a laser scanning for cutting a glass plate, the resin films adhered to the glass plate and the resin film adhered thereto were not cut. Examples 1 to 5 were compared with Comparative Examples 1 and 2, and the glass plate was cut. Good break accuracy. Further, in Examples 1 to 5 in which linear heat-degraded portions were formed on the resin film by moving the irradiation position of the laser light on the glass plate, the irradiation positions of the laser light were compared with those of Comparative Examples 1 and 2. The end portion of the moving track, that is, the end portion of the glass plate, has good cutting precision.

In the above, the method of cutting the composite sheet and the method of cutting the glass sheet have been described in the embodiment, but the present invention is not limited to the above-described embodiment and the like, and various modifications and improvements can be made within the scope of the patent application. .

The present application claims the priority of Japanese Patent Application No. 2012-182656, the entire disclosure of which is hereby incorporated by in.

10‧‧‧Composite board

12‧‧‧ glass plate

12a‧‧‧Laser illuminated surface

14‧‧‧ resin film

20‧‧‧Laser light

30‧‧‧ initial crack

31‧‧‧ crack

40‧‧‧Refrigerant

50‧‧‧ nozzle

121, 122‧‧‧ glass

143‧‧‧ Thermal Degradation Department

Claims (11)

A method for cutting a composite sheet, comprising a method for cutting a composite sheet comprising a glass sheet having a thickness of 200 μm or less and a resin film formed on the glass sheet, and comprising the steps of: forming the glass sheet of the composite sheet Locally irradiating the laser light, locally heating the glass plate at a temperature below the slow cooling point of the glass, moving the laser light at the irradiation position of the glass plate, and passing the glass in the thickness direction along the movement track The crack of the plate is stretched, and in the step, the resin film crosses the crack and connects the glass on both sides of the crack, and the step is to move the laser light to the irradiation position of the glass plate. In the thermal deterioration portion in which the resin film is formed in a linear shape, the thermal deterioration means that the resin film is pulled after the laser irradiation based on the tensile strength (MPa) of the resin film before the laser irradiation. The tensile strength was reduced by 0.01% or more, and the resin film was cut after this step. The method of cutting a composite sheet according to claim 1, wherein the resin film is bent around the linear heat-degraded portion, and the end portion of the moving trajectory, that is, the end portion of the glass sheet is cut. The method of cutting a composite sheet according to claim 1 or 2, wherein the resin film is cut along the thermally deteriorated portion by bending the resin film around the linear heat-degraded portion. A method of cutting a composite panel according to claim 1 or 2, wherein in said step, said laser sheet is irradiated with said laser light from a side opposite to said resin film side. The method of cutting a composite panel according to claim 1 or 2, further comprising the step of forming an initial crack as a starting point of a crack penetrating the glass sheet in the thickness direction on the glass sheet. The method for cutting a composite panel according to claim 1 or 2, wherein the glass sheet of the composite sheet is partially cooled by a refrigerant, and a supply position of the refrigerant on the glass sheet and an irradiation position of the laser light in the glass sheet are provided. Move in conjunction. A method for cutting a glass sheet, which is a method for cutting a glass sheet having a thickness of 200 μm or less, and comprising the steps of: partially applying the glass sheet to a composite sheet comprising the glass sheet and a resin film formed on the glass sheet Radiating the ground light, locally heating the glass plate at a temperature below the slow cooling point of the glass, moving the laser light at the irradiation position of the glass plate, and passing the glass plate in the thickness direction along the movement track The crack is stretched, and in the step, the resin film crosses the crack and connects the glass on both sides of the crack, and the step is to move the laser light at the irradiation position on the glass plate. The movement track is formed by forming a linear heat-degraded portion in the resin film, and the term "thermal deterioration" refers to stretching of the resin film after laser irradiation based on the tensile strength (MPa) of the resin film before laser irradiation. The strength is reduced by 0.01% or more. After the above step, the resin film is bent around the linear heat-degraded portion, and the end portion of the moving locus is the glass. The end of the glass plate is cut. The method for cutting a glass sheet according to claim 7, wherein the resin film is peeled off from the glass sheet in a state where the resin film is not cut. A method of cutting a glass sheet according to claim 7 or 8, wherein in said step, said laser sheet is irradiated with said laser light from a side opposite to said resin film side. The method for cutting a glass sheet according to claim 7 or 8, further comprising the step of forming an initial crack in the glass sheet as a starting point of a crack that penetrates the glass sheet in a thickness direction. The method for cutting a glass sheet according to claim 7 or 8, wherein in the above step, the glass sheet is partially cooled by a refrigerant, and a supply position of the refrigerant on the glass sheet and irradiation of the laser light in the glass sheet are performed. The position moves in conjunction.