TW201609587A - Regeneration method of glass plate and regeneration apparatus of glass plate - Google Patents

Abstract

The present invention relates to a glass plate regeneration method, characterized by removing a resin layer formed on the glass plate, and comprising: a removal step which uses grinding agent in conjunction with a roll brush to remove the resin layer formed on the glass plate, and a grinding step which grinds the surface of the glass plate of which the resin layer has been removed.

Description

Glass plate regeneration method and glass plate regeneration device

The present invention relates to regeneration of a glass sheet from which a resin layer is removed from a composite in which a resin layer is adhered to a glass plate.

In recent years, thinner and lighter electronic devices (electronic devices) such as solar cells (PV), liquid crystal panels (LCDs), and organic EL (Electroluminescence) panels (OLEDs) have been developed. As one of the methods for reducing the thickness and weight of the electronic device, the thinning of the glass substrate used in the electronic device is performed.

However, if the strength of the glass substrate is insufficient due to the thinning, the glass substrate is rationally lowered in the manufacturing process of the device.

Therefore, from the beginning, a method of forming a surface of an electronic device (for example, a thin film transistor) on a glass substrate having a thickness thicker than a final thickness has been widely used, and then the glass substrate is thinned by a chemical etching treatment.

However, in this method, for example, when the thickness of the glass substrate is thinned from 0.7 mm to 0.2 mm or 0.1 mm, most of the material of the original glass substrate is removed by the etching liquid. Therefore, this method is not preferable from the viewpoint of productivity or use efficiency of raw materials. Further, in the method of thinning a glass substrate by chemical etching, fine scratches are formed on the surface of the glass substrate, and fine pits (corrosion pits) are formed from the scratches by the etching process. The case of optical defects.

In order to solve such a problem, recently, there has been proposed a method of producing a glass laminate in which a thin-plate glass substrate and a composite volume layer serving as a reinforcing plate are formed, and in a glass laminate. After forming a component for an electronic device such as a display device on the thin glass substrate, the composite is peeled off from the thin glass substrate (see Patent Document 1).

The composite has a glass plate serving as a support substrate and a resin layer (polyoxymethylene resin layer) formed on the support substrate. A thin plate glass substrate formed of a component for an electronic device is laminated and bonded to a resin layer of the composite to form a glass laminate (see FIG. 2(B) below).

The composite in which the thin glass substrate on which the electronic component is formed is peeled off can be laminated and bonded to a new thin glass substrate to be reused.

Here, the composite body is gradually deteriorated depending on the number of reuses due to heating or liquid treatment accompanying the manufacture of the electronic component parts, peeling/bonding to the thin glass substrate, and the like. When the resin layer is deteriorated, there is a problem that it is impossible to obtain a necessary adhesive force with the thin glass substrate, and the deteriorated resin adheres to the thin glass substrate.

When the resin layer of the composite is deteriorated, the resin layer must be peeled off from the support substrate (the glass plate serving as the support substrate) to form the resin layer again.

Further, it is considered that the resin layer is peeled off from the support substrate regardless of whether or not the resin layer is deteriorated, and is used as a glass plate product other than the composite.

As a method of peeling the resin layer from the support substrate, a method of removing by a cutter or a method of removing the sprayed particles such as calcium carbonate powder may be considered. However, in these methods, there is a possibility that fine cracks are generated on the surface of the support substrate due to contact with the cutter or impact of the sprayed particles, and fine cracking occurs when the support substrate (glass plate) is reused. The support substrate is damaged by the influence.

As a method of removing the resin layer without causing fine cracking of the support substrate, a method of burning the resin layer in the air is considered. However, in this method, an oxide such as ruthenium oxide is formed by the combustion of the resin layer and adheres to the support substrate. Since the oxide is fixed to the support substrate, it is difficult to remove.

As a solution to this problem, the resin layer is self-complexed without breaking the support substrate. There is a method of supporting substrate removal, and there is a method described in Patent Document 2.

In the method, first, the resin layer is exposed to an atmosphere of 300 to 450 ° C, or an inert atmosphere of 350 to 600 ° C, or water vapor of 150 to 350 ° C to carry out a heat treatment step. Then, a washing step is performed in which the resin layer is removed by polishing the heat-treated resin layer with a chemical solution or an abrasive.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] International Publication No. 2007/018028

[Patent Document 2] International Publication No. 2011/111611

In the method of removing the resin layer described in Patent Document 2, the resin layer is removed by decomposing the resin layer by a heat treatment step. Therefore, the support substrate can be omitted by a method of removing or swelling the resin layer by using a chemical solution, or by removing the resin layer by using a dispersion in which the polishing agent is dispersed, and removing the resin layer by brushing. The resin layer is easily removed from the support substrate by breakage.

On the other hand, in this method, it is necessary to carry out a heat treatment step in an atmosphere of 300 to 450 ° C, an inert atmosphere of 350 to 600 ° C, or a water vapor of 150 to 350 ° C.

Therefore, there are disadvantages such as the removal of the resin layer, the labor of the resin layer, the large scale of the equipment for the heat treatment, the poor productivity, and the high cost.

An object of the present invention is to solve the above problems of the prior art, and to provide a method for regenerating a glass sheet and a glass sheet reproducing apparatus for carrying out the method for regenerating the glass sheet, wherein the method for regenerating the glass sheet is to support the resin layer When the composite body in which the resin layer is formed on the glass plate of the substrate is removed, the resin layer can be removed from the composite without heat treatment at a high temperature, whereby the processing can be simplified without requiring a large change in equipment. The productivity of the reuse of the substrate is increased or the processing cost is lowered.

In order to achieve the above object, the present invention provides a method for regenerating a glass sheet, which is characterized in that the resin layer is formed on a glass plate, and includes a removing step which is formed by using a roller by a roller brush. The resin layer on the glass plate is removed; and a polishing step of polishing the surface of the removed resin layer of the glass plate from which the resin layer has been removed.

In the method for regenerating the glass sheet of the present invention, it is preferred that the step of placing a flaw on the surface of the resin layer before the removing step is performed.

Moreover, it is preferable that the wire diameter of the bristles of the roller brush is 0.2 mm or more.

Moreover, it is preferable that the removal step is a step of removing the resin layer using a slurry in which the polishing agent is dispersed, and the concentration of the polishing agent in the slurry is 10% by mass or more.

Further, it is preferable that the resin layer contains a polyoxyn resin.

Further, it is preferable that the polyfluorene oxide resin is a cured product of an addition reaction type polyfluorene oxygen, and the addition reaction type polyfluorene oxygen is a linear organopolyoxane (a) having the following line and the following line The curable polyoxynoxy resin composition of the organopolysiloxane (b): linear organopolyoxane (a): a linear organopolyoxane having at least two alkenyl groups per molecule; Linear organopolyoxane (b): at least 3 hydrogen atoms bonded to a deuterium atom per molecule, and at least one hydrogen atom bonded to a deuterium atom at the end of the molecule The above-mentioned resin layer is a cured polyoxyalkylene resin layer formed by curing the curable polyanthracene resin composition on the surface of the glass plate.

Moreover, the glass plate reproducing apparatus of the present invention is characterized in that it is a resin layer formed on a glass plate, and includes a removing device having a roller brush, a conveying mechanism, and an abrasive supply mechanism, which are formed. The resin layer on the glass plate is removed, and the transfer mechanism relatively transports the roll brush and the glass plate having the resin layer, and the abrasive supply mechanism applies the roll brush and the roll brush in the relative transfer by the transfer mechanism. Further, at least one of the resin layers of the glass plate on the upstream side is supplied with a slurry containing an abrasive; and a polishing apparatus for polishing the resin layer removal surface of the glass plate obtained by removing the resin layer by the removal device.

According to the invention, in the composite in which the resin layer is formed on the glass plate as the support substrate, the glass layer can be regenerated without removing the resin layer from the composite without performing heat treatment at a high temperature.

Therefore, according to the present invention, it is possible to simplify the processing without making a large change in the apparatus, and it is possible to improve the productivity of the reuse of the support substrate of the composite or to reduce the processing cost.

10‧‧‧ glass plate

12‧‧‧ resin layer

14‧‧‧Compound

18‧‧‧Sheet glass substrate

20‧‧‧Glass laminate

30‧‧‧ Roller brush

30a‧‧‧bristles

32‧‧‧Drip device

36‧‧‧Transport roller

X‧‧‧ arrow

Fig. 1 is a flow chart for explaining an example of a method of regenerating a glass sheet of the present invention.

Fig. 2(A) is a view conceptually showing an example of a composite which is a raw material of a method for regenerating a glass plate of the present invention, and Fig. 2(B) conceptually shows that it is produced by the regeneration method of the present invention. A diagram of an example of a glass laminate of the composite.

Fig. 3 is a conceptual diagram for explaining an example of a removal step in the method for regenerating a glass sheet of the present invention and a removal device in the regeneration apparatus.

Hereinafter, the method for regenerating the glass sheet of the present invention and the apparatus for regenerating the glass sheet will be described in detail based on the preferred examples shown in the accompanying drawings.

In Fig. 1, an example of a method of regenerating a glass sheet of the present invention is conceptually shown in a flow chart.

As shown in FIG. 1, the method for regenerating a glass plate of the present invention (hereinafter, also referred to as the present invention) The method of regenerating) is a method in which the resin layer 12 is formed by using the composite 14 in which the resin layer 12 is formed on the surface (main surface) of the glass sheet 10 as conceptually shown in FIG. 2(A) as a raw material. The removal step of removing the composite 14 (the glass plate 10) and the polishing step of polishing the glass sheet 10 from which the resin layer 12 has been removed are used to regenerate the reusable glass sheet 10.

Further, in the example shown in Fig. 1, as a preferred aspect, a flaw insertion step of placing a flaw on the surface of the resin layer 12 is performed before the removing step.

The composite 14 is used as a glass laminate 20 in which the surface layer of the resin layer 12 is conceptually shown in Fig. 2(B) and the thin glass substrate 18 is bonded. The glass laminate 20 is used for a display device such as a liquid crystal panel or an organic EL panel, or a manufacturer of an electronic device (electronic device) such as a solar cell, and forms a component for an electronic device that constitutes an electronic device on the surface of the thin glass substrate 18.

The glass plate 10 of the composite 14 functions as a support substrate (support) of the thin glass substrate 18 when manufacturing an electronic device.

After the desired electronic component parts are formed on the surface of the thin glass substrate 18, the thin glass substrate 18 is peeled off from the composite 14 (resin layer 12) with respect to the glass laminate 20.

The thin glass substrate 18 peeled off from the composite 14 is, for example, supplied to a step below the manufacturing of the electronic device.

On the other hand, in the composite 14 in which the thin glass substrate 18 is peeled off, the resin layer 12 is removed by the reproducing method of the present invention to form a single-plate glass plate 10. Alternatively, the composite body 14 from which the thin glass substrate 18 has been peeled off is laminated on the resin layer 12, and the new thin glass substrate 18 is bonded to each other to form a glass laminate 20 for reuse.

The glass plate 10 serves as a support substrate (support) that supports the thin glass substrate 18 constituting the glass laminate 20.

As the glass of the glass plate 10, various glasses can be utilized. As an example, an alkali-free glass, a borosilicate glass, a soda-lime glass, a high-cerium oxide glass, and other cerium oxide can be illustrated. The oxide of the main component is glass.

The thickness of the glass plate 10 is set as an example according to the thickness of the thin glass substrate 18 which comprises the glass laminated body 20.

That is, regarding the thickness of the glass plate 10, the thickness of the glass plate 10 is selected according to the thickness of the thin glass substrate 18, the thickness of the resin layer 12, and the thickness of the glass laminate 20. For example, when the part forming step is designed to treat a substrate having a thickness of 0.5 mm, and the sum of the thickness of the thin glass substrate 18 and the thickness of the resin layer 12 is 0.1 mm, the thickness of the glass plate 10 is set to 0.4 mm. . Further, the thickness of the glass sheet 10 may be the same as that of the thin glass substrate 18 or thicker or thinner than the thin glass substrate 18.

Further, the thickness of the glass sheet 10 is preferably 0.08 mm or more for reasons of easy handling and difficulty in cracking. Moreover, it is expected that the thickness of the glass plate 10 is preferably 1 mm or less for the reason that the parts for electronic devices are formed without being broken and moderately bent during peeling.

Further, in the composite 14, the resin layer (adhesion layer/adsorption layer) 12 is bonded to the thin glass substrate 18 so as to be detachable. The resin layer 12 has an adhesive force for bonding the thin glass substrate 18 so as to be freely peelable, and is adhered to the glass plate 10.

The resin forming the resin layer 12 can be used as long as it can secure the target adhesion and peelability. Specifically, an acrylic resin, a polyolefin resin, a polyurethane resin, a polyimide resin, a polyoxynoxy resin, a polyamidene polyoxyl resin, a polyoxyl sol-condensation can be exemplified. Glue material. The resin layer 12 can also be used by mixing several kinds of resins.

Among them, from the viewpoint of heat resistance or peelability, the resin layer 12 containing a polyoxyxylene resin is preferable.

As an example, the resin layer 12 containing a polyoxynoxy resin is formed by applying a curable polyoxymethylene-containing resin composition which is a polyoxyxylene resin to the glass sheet 10 and curing it.

The sclerosing polyfluorene is classified into a condensation reaction type polyoxane, an addition reaction type polyoxane, an ultraviolet curing type polyfluorene, and an electron beam hardening type polyoxane according to the hardening mechanism, and any of them may be used.

Among these, an addition reaction type polyoxane is preferred. This is because the curing reaction is easy, and the degree of peeling property is good when the polyoxynoxy resin layer is formed, and the heat resistance is also high.

The addition reaction type polyfluorene is a curable composition containing a main component and a crosslinking agent and hardened in the presence of a catalyst such as a platinum-based catalyst. The hardening of the addition reaction type polyoxygen is promoted by heat treatment.

The main component of the addition reaction type polyoxo is preferably an organic polyoxyalkylene having an alkenyl group (vinyl group or the like) bonded to a halogen atom (that is, an organic alkenyl polyoxyalkylene. Further, preferably, It is linear), and an alkenyl group or the like becomes a crosslinking point. The crosslinking agent in the addition reaction type polyoxo is preferably an organic polyoxyalkylene having a hydrogen atom (hydroalkylene group) bonded to a halogen atom (i.e., an organic hydrogen polyoxyalkylene. Further, preferably It is linear), and hydroquinone or the like becomes a crosslinking point.

The addition reaction type polyoxymethylene is hardened by an addition reaction of a crosslinking point of a main agent and a crosslinking agent. Further, in terms of the more excellent heat resistance of the crosslinked structure, the organic hydrogen polyoxyalkylene is preferably bonded to the hydrogen atom of the halogen atom relative to the alkenyl group of the organic alkenyl polyoxyalkylene. It is 0.5~2.

Among them, the addition reaction type polyfluorene oxide is preferably a curable polyoxynoxy resin composition comprising the linear organopolyoxane (a) and the linear organopolyoxane (b) described below: linear Organic polyoxyalkylene (a): linear organopolyoxane having at least 2 alkenyl groups per molecule; and linear organopolyoxane (b): at least 3 bonds per molecule a linear organopolyoxane which is a hydrogen atom of a ruthenium atom and is bonded to at least one of the hydrogen atoms of the ruthenium atom at the end of the molecule.

The resin layer 12 is more preferably made of the curable polyoxynoxy resin composition on the glass plate 10 A hardened polyoxyalkylene resin layer formed by surface hardening.

When the curable polyfluorene oxide to be the resin layer 12 is an addition reaction type polyfluorene oxygen, the resin composition to be the resin layer 12 may further contain a catalyst (particularly a platinum group metal catalyst) or Reaction inhibitors and the like.

A platinum group metal catalyst (a platinum group metal catalyst for hydrogenation) is used for carrying out and promoting the hydrogenation reaction of an alkenyl group in the above organic alkenyl polyoxane with a hydrogen atom in the above organic hydrogen polyoxyalkylene. Catalyst. Examples of the platinum group-based catalyst include platinum-based, palladium-based, and ruthenium-based catalysts. In particular, in terms of economy and reactivity, a platinum-based catalyst is preferably used.

A reaction inhibitor (a reaction inhibitor for hydrogenation) is a so-called pot life extender which suppresses the catalytic activity of the catalyst (particularly a platinum group metal catalyst) at a normal temperature and prolongs the service life of the resin composition ( Also known as retarder). Examples of the reaction inhibitor include various organic nitrogen compounds, organophosphorus compounds, acetylene compounds, hydrazine compounds, and organochlorine compounds. Particularly suitable are acetylene compounds (for example, decyl alcohols and decyl compounds of acetylene alcohols).

In the composite 14, the thickness of the resin layer 12 may be appropriately set depending on the use of the composite 14 (that is, the glass laminate 20).

Here, the thickness of the resin layer 12 is preferably from 2 to 100 μm, more preferably from 3 to 50 μm, still more preferably from 7 to 20 μm, according to studies by the inventors of the present invention. By making the thickness of the resin layer 12 into this range, the occurrence of deformation defects of the thin glass substrate 18 can be suppressed. Further, when the resin layer 12 is too thick, it takes time and material to form, which is not economical, and further, heat resistance is lowered. On the other hand, when the resin layer 12 is too thin, the adhesion between the resin layer 12 and the thin glass substrate 18 may be lowered.

Further, the resin layer 12 may also contain two or more layers. In this case, the thickness of the resin layer 12 means the total thickness of all the layers.

Further, when the resin layer 12 contains two or more layers, the resin forming each layer may be a resin containing different crosslinkable polyfluorene oxide.

Further, the thin glass substrate 18 which is laminated on the composite body 14 and constitutes the glass laminate 20 is generally used as a glass substrate formed of a component for an electronic device such as a thin film transistor in the manufacture of an electronic device.

As described above, the regeneration method of the present invention is a method of removing the composite 14 of the resin layer 12. Here, in the regeneration method of the present invention shown in Fig. 1, as a preferred aspect, the flaw insertion step is performed before the removal step of removing the resin layer 12. Therefore, the glass plate reproducing apparatus of the present invention may have a flaw insertion device for performing the flaw placing step.

This flaw insertion step is a step of applying a scratch such as a scratch on the surface (preferably the entire surface) of the resin layer 12 of the composite 14 (step of impairing the surface of the resin layer 12).

By performing the flaw insertion step before the removal step, the flaw on the surface of the resin layer 12 functions as a starting point (correlation point/starting point) of removal of the resin layer 12 by the bristles of the roller brush and the polishing agent. Therefore, by performing the flaw insertion step, the removal of the resin layer 12 in the removal step can be easily and efficiently performed, and the load of the removal step can be alleviated, which is preferable in terms of such aspects.

Regarding the method of inserting the flaw into the resin layer 12 in the flaw insertion step, various methods of inserting a flaw into the resin layer 12 can be utilized depending on the hardness of the resin layer 12, the forming material, and the like. In other words, in the glass plate reproducing apparatus of the present invention, various known devices capable of inserting a flaw into the resin layer 12 can be used as the flaw insertion device.

As a preferred method (device) for injecting a flaw, a method (apparatus) using a roller brush can be exemplified. The roller brush is provided with a bristles made of nylon or the like on the surface (peripheral surface) of a plurality of disk-shaped core materials arranged along the center of the rotation axis or the surface (peripheral surface) of the cylindrical core material ( Fiber, wire, wire). The roller brush rotates with the axis of rotation (the center of the disk) or the center of the cylinder as the axis.

As an example, in the flaw insertion step using the roller brush, the composite layer 14 is conveyed by a conveyance roller or the like with the resin layer 12 facing upward. In the upper part of the transport path, a rotating shaft is arranged A roller brush that is aligned with the direction orthogonal to the conveying direction. The roller brush is disposed such that the bristles are pressed against the conveyed composite 14 (resin layer 12) (in a press-fit manner) (see FIG. 3).

Therefore, when the composite 14 passes under the roller brush, scratches such as scratches are applied to the surface of the resin layer 12 by the bristles of the roller brush pressed while rotating. Further, by making the width of the roller brush (the length in the direction of the rotation axis) longer than the width of the composite 14 (the length in the direction orthogonal to the conveyance direction), the entire surface of the resin layer 12 can be scratched.

Alternatively, the composite body 14 may be fixed without moving the composite body 14, and the roller brush may be conveyed in a direction orthogonal to the rotation direction, whereby the composite body 14 is passed around the rotating roller brush.

In addition to the method of using a roller brush, the flaw of the resin layer 12 in the flaw insertion step may be various methods using a flaw insertion mechanism. As an example, a method may be employed in which a member such as a razor-like front end or a comb-tooth member is used, and the resin layer 12 is pressed against the resin layer 12, and the flaw insertion mechanism is moved relative to the composite body 14.

In the scar insertion step, the pressing force of the flaw insertion mechanism such as the hardness of the flaw insertion mechanism such as the roller brush or the comb-tooth member, the pressing amount of the bristles, and the like, the relative relationship between the flaw insertion mechanism and the resin layer 12 can be adjusted. The hardness (toughness), density, size, and the like of the member that is in contact with the resin layer 12 such as the moving speed, the bristles, and the like, and the depth of the flaw applied to the resin layer 12, the density of the flaw, the size of the flaw, and the like are adjusted.

As an example, the flaw insertion step is preferably performed to such an extent that white turbidity due to a flaw applied to the resin layer 12 is visually observed.

The removing step is a step of removing the resin layer 12 from the composite 14 (its glass plate 10).

In the present invention, the removal of the resin layer 12 is carried out using an abrasive and a roller brush. Specifically, a method in which a slurry obtained by dispersing free abrasive grains as an abrasive in water or the like is used, and the resin layer 12 is removed by grinding with a roller brush.

As the free abrasive grains, various known free abrasive grains such as cerium oxide, calcium carbonate, hard plastic, POLY-PLUS, peach kernel powder, and zirconia can be used. Among them, calcium carbonate can be preferably used in terms of good abrasiveness, ease of acquisition, price, and the like.

These free abrasive grains may be used singly or in combination of plural kinds.

Further, the number average particle diameter of the free abrasive grains is preferably from 1 to 10 μm.

The free abrasive grains are preferably dispersed in water or the like to be used as a slurry.

The concentration of the free abrasive grains in the slurry is appropriately set depending on the free abrasive grains to be used, the material for forming the resin layer 12, the thickness of the resin layer 12, the type of the roller brush, or the operating conditions (pressing amount or number of revolutions, etc.). Just fine.

Here, the concentration of the free abrasive grains in the slurry is preferably 5% by mass or more, and more preferably 10% by mass or more, according to studies by the inventors of the present invention. By setting the concentration of the free abrasive grains in the slurry to 5% by mass or more, the removal of the resin layer 12 can be stably performed with good efficiency.

Further, generally, the higher the concentration of the free abrasive grains in the slurry, the better the removal efficiency of the resin layer 12. However, if the concentration of the free abrasive grains in the slurry reaches a certain concentration, even if the concentration is further increased, the removal efficiency of the resin layer 12 is less increased, and the free abrasive grains added to the slurry cannot be effectively use. On the other hand, by setting the concentration of the free abrasive grains in the slurry to 30% by mass or less, the free abrasive grains added to the slurry can be effectively utilized without waste.

In the regeneration method of the present invention, the removal of the resin layer 12 using the abrasive is carried out using the roller brush as described above.

The removal of the resin layer by the roller brush is removed by mechanical and physical action. Therefore, the resin layer 14 can be suitably removed by increasing the number of revolutions of the roller brush (circumferential speed) to easily apply the bristles to the resin at a higher frequency.

The bristles of the roller brush can be utilized with various materials. Specifically, a bristles made of nylon (roller brushes made of nylon) can be preferably exemplified. By using the bristles made of nylon, the device can be easily obtained, the resin layer 12 can be stably removed, the damage of the glass plate 10 can be suppressed, and the removal of the resin layer 12 with high efficiency can be preferably performed.

Moreover, the wire diameter of the bristles (especially nylon bristles) is preferably 0.05 mm or more, more preferably 0.1 mm or more, particularly preferably 0.2 mm or more. By using the bristles having a wire diameter of 0.05 mm or more, the resin layer 14 can be removed efficiently.

The wire diameter of the bristles is preferably 0.6 mm or less, more preferably 0.5 mm or less. By setting the wire diameter of the bristles to 0.6 mm or less, damage of the glass plate 10 when the resin layer 14 is removed can be prevented, and the burden of the subsequent polishing step can be reduced.

An example of a removing device for removing the resin layer 12 using a roller brush is conceptually shown in FIG.

In the removal (removal device) of the resin layer 12, the resin layer 12 is removed while the resin layer 12 is facing upward, and the composite 14 is conveyed by the conveyance roller 36 in the direction of the arrow x in the figure.

A roller brush 30 that aligns the rotating shaft and the direction orthogonal to the conveying direction of the composite 14 is disposed in the upper portion of the conveying path. The length of the roller brush 30 in the direction of the rotation axis is longer than the length of the composite body 14 in this direction. Further, the roller brush 30 is disposed such that the bristles 30a are pressed against the composite 14 (resin layer 12) conveyed by the conveyance roller 36 (in a press-fit manner). That is, the roller brush 30 is disposed such that the distance from the center of rotation of the roller brush 30 to the composite body 14 is shorter than the distance from the center of rotation of the roller brush 30 to the front end of the bristles 30a.

Further, a dropping device 32 is disposed above the roller brush 30, and a slurry in which free abrasive grains are dispersed is dropped onto the roller brush 30.

Therefore, when the composite body 14 passes under the roller brush 30, the resin layer 12 is self-composite 14 by rotating the bristles 30a of the roller brush 30 pressed against one surface and the free abrasive grains of the slurry adhered to the bristles 30a. It is removed and removed to become a single-plate glass plate 10.

The amount of the slurry to be dropped from the dropping device 32, the conveying speed of the composite 14, the number of revolutions of the roller brush 30, the amount of the bristles 30a to be pressed into the resin layer 12, and the like, as long as the free abrasive grains and pulp are used. The concentration of the material, the material for forming the resin layer 12, the thickness of the resin layer 12, the wire diameter or length of the bristles 30a, and the like may be appropriately set to appropriately remove the resin layer 12.

Although the size or the number of revolutions of the roller brush 30 and the wire diameter of the bristles 30a are also used, the amount of the bristles 30a to be pressed is preferably 0.5 to 5 mm, more preferably 1 to 3 mm. By setting the amount of pressing of the bristles to this range, damage of the glass sheet 10 can be prevented, and the resin layer 14 can be removed more efficiently.

Further, the removal of the resin layer 12 from the glass sheet 10 by using the roller brush 30 may be performed by passing the composite body 14 one time under the roller brush 30, or by passing the composite body 14 under the roller brush 30. The second time.

Further, in the example shown in FIG. 3, the resin layer 12 is removed by fixing the roller brush 30 and transporting the composite 14, but conversely, the composite 14 can be fixed and moved by the roller brush 30 (or further) The removal of the resin layer 12 is performed by moving the dropping device 32).

Further, the slurry in which the free abrasive grains (abrasive agent) is dispersed is not limited to being supplied to the roller brush 30, and may be supplied to the resin layer 12 on the upstream side of the roller brush 30 in the relative movement of the roller brush and the composite body 14. surface. That is, in the example shown in FIG. 3, the dropping device 32 may be disposed on the left side of the roller brush 30, and the slurry may be supplied to the surface of the resin layer 12. Alternatively, the slurry may be supplied to both the roller brush 30 and the surface of the resin layer 12 on the upstream side of the roller brush 30.

After the resin layer 12 is removed from the composite 14, a polishing step of polishing the surface of the glass sheet 10 on the side from which the resin layer 12 has been removed is performed.

As described above, in the regeneration method of the present invention, the resin layer 12 is removed by grinding using an abrasive such as free abrasive grains. Therefore, the surface of the resin layer removed from the glass sheet 10 is scratched by the polishing agent, the surface properties are deteriorated, and the strength of the glass sheet 10 is also lowered.

On the other hand, in the regeneration method of the present invention, after the resin layer 12 is removed, the surface of the glass plate 10 is polished, whereby the strength of the glass plate 10 to be produced can be ensured, and the surface properties are also good.

Further, in the regenerating method of the present invention, not only the polishing of the surface on which the resin layer 12 has been removed but also the surface on the opposite side may be performed in the polishing step (the glass sheet 10 is not formed). Grinding of the surface of the resin layer 12). That is, both sides of the glass plate 10 can be polished in the polishing step.

In the composite 14, the surface of the glass sheet 10 on which the resin layer 12 is not formed is exposed. Further, in the state of the glass laminate 20, the surface of the glass sheet 10 on which the resin layer 12 is not formed is also exposed. Therefore, for example, the surface of the glass sheet 10 on which the resin layer 12 is not formed is often damaged by sliding contact with other members during operation, heating or liquid treatment when forming an electronic device, and the like.

In response to this, in the regeneration method of the present invention, not only the surface of the glass sheet 10 on which the resin layer 12 is formed but also the surface on which the resin layer 12 is not formed may be polished.

In the polishing step, various polishing methods of glass plates can be used for the polishing method of the glass plate 10. That is, in the regenerating apparatus for a glass sheet of the present invention, the polishing apparatus can use a polishing apparatus of various known glass sheets.

As an example, a method (apparatus) is described in which a glass plate held on a carrier is pressed against a polishing pad provided on a polishing platen, and the polishing platen and the carrier are relatively rotated to polish the glass plate. As another method, a method (apparatus) in which a glass plate is adsorbed and held on an adsorption sheet fixed to a stage and a platform is conveyed in a specific direction while being multi-grinded by a grinder disposed above the conveyance path The glass sheets are ground, and the grinding tools have a diameter larger than that of the glass sheets, and are rotated and revolved according to a specific rotation center.

A member obtained by polishing a glass plate such as a polishing pad or the like is supplied with a polishing slurry obtained by dispersing an abrasive in water or the like.

In the regeneration method of the present invention, the amount of polishing of the surface of the glass sheet 10 from which the resin layer 12 has been removed may be appropriately set so as to eliminate the amount of polishing caused by the removal of the resin layer 12.

Although it also depends on the state of the surface of the glass sheet 10 from which the resin layer 12 has been removed, the root According to the study by the inventors of the present invention, in general, when the surface of the resin layer 12 has been removed by polishing to a thickness of about 0.3 to 2 μm, damage due to removal of the resin layer 12 can be suitably eliminated, thereby obtaining sufficient strength and goodness. Surface properties.

Moreover, the amount of polishing is preferably small. In consideration of this aspect, it is preferable to remove the resin layer 12 so that the glass plate 10 can recover sufficient strength with a polishing amount of 0.3 to 0.5 μm.

In addition, the amount of polishing of the surface of the glass sheet 10 on which the resin layer 12 is not formed may be appropriately set depending on the damage state of the surface or the like.

As described above, the glass sheet 10 produced in this manner can be reused in a glass product different from the composite 14 or the resin layer 12 can be formed again to form the composite 14 and reused.

In the above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention.

<Recycling of recycled glass sheets>

The glass sheet 10 from which the resin layer 12 is removed can be variously reused. For example, after the resin layer 12 is removed, the resin layer is newly formed, whereby a glass plate with a resin layer can be used and used. Further, the glass sheet 10 from which the resin layer 12 is removed can be directly used as a substrate for a large-sized display or the like.

In any case, since the strength of the end portion of the glass sheet 10 after peeling is likely to be lowered, it is preferable to perform chamfering on the end portion and then reuse it. The chamfering of the glass plate 10 may be performed in a state in which the resin layer 12 is attached to the glass plate 10, or may be performed after the resin layer 12 is removed from the glass plate 10.

[Examples]

Hereinafter, the present invention will be described in more detail with reference to specific embodiments of the invention.

<Preparation of Resin Composition>

A linear vinyl methyl polyoxyalkylene as a component (A) ("VDT-127", viscosity at 25 ° C, 700-800 cP (centipoise): Azmax, ethylene in 1 mol of organic polyoxane Molar % of base: 0.325) and linear methyl hydrogen polyoxyalkylene as component (B) ("HMS-301", viscosity at 25 ° C 25-35 cP (centipoise): Azmax, 1 molecule) The number of hydrogen atoms bonded to the ruthenium atom: 8) is mixed in such a manner that the molar ratio (hydrogen atom/vinyl group) of all the vinyl groups to the hydrogen atom bonded to the ruthenium atom is 0.9.

1 part by mass of the oxime compound having an acetylene-based unsaturated group represented by the following formula (1) as a component (C) (boiling point: 120 ° C) is mixed with 100 parts by mass of the mixture of the oxirane.

HC≡CC(CH ₃ ) ₂ -O-Si(CH ₃ ) ₃ (1)

Then, a platinum-based catalyst (manufactured by Shin-Etsu Chemical Co., Ltd.) was added to the total amount of the component (A), the component (B), and the component (C) so that the platinum metal concentration was 100 ppm in terms of platinum. CAT-PL-56), and a mixture of organopolyoxane compositions was obtained.

Furthermore, 150 parts by mass of IP Solvent 2028 (initial boiling point: 213 to 262 ° C, manufactured by Idemitsu Kogyo Co., Ltd.) was added to 100 parts by mass of the obtained mixed liquid to prepare an unhardened crosslinkable organic polyoxyalkylene. A resin composition.

<Production of Composite 14>

A glass plate (length manufactured by Asahi Glass Co., Ltd., AN100, alkali-free glass, linear expansion coefficient: 38×10 ^-7 /° C.) having a length of 720 mm × a width of 600 mm × a thickness of 0.4 mm obtained by a floating method was used as a composite glass plate 10 . . One surface of the glass plate 10 was washed with pure water and UV (ultraviolet) to clean the surface.

The prepared resin composition was applied to the cleaned surface of the glass plate 10 by a spin coater.

Further, the resin composition was heat-hardened at 180 ° C for 30 minutes in the air to prepare a composite 14 having a resin layer 12 (polyoxymethylene resin layer) having a thickness of 8 μm as shown in Fig. 2(A).

[Example 1]

The resin layer 12 is removed from the composite 14 which is a raw material using the apparatus shown in FIG.

Roller diameter of roller brush 30 It is 38 mm, and the bristles 30a are made of nylon, and have a wire diameter of 0.2 mm and a length of 9 mm.

The number of revolutions of the roller brush 30 was set to 600 rpm, the amount of press of the bristles 30a was set to 0.7 mm, and the conveyance speed of the composite 14 was set to 1 m/min (minute).

Further, a slurry obtained by dispersing calcium carbonate in water is added to the roller brush 30 from the dropping device 32. The concentration of calcium carbonate was set to 5% by mass.

Under this condition, the composite 14 was passed through the roller brush 30 four times, and the resin layer 12 was removed from the composite 14 (by number four times).

Further, the surface of the peeled resin layer 12 of the glass plate 10 was ground by 0.5 μm using a cerium oxide slurry by a polishing pad made of suede, and the glass plate 10 was regenerated.

[Embodiment 2]

In the removal of the resin layer 12, the wire diameter of the bristles 30a is changed to 0.3 mm, the pressing amount of the bristles 30a is changed to 2.5 mm, and the conveying speed of the composite 14 is changed to 0.5 m/min. The glass plate 10 was regenerated in the same manner as in the first embodiment.

[Example 3]

In the removal of the resin layer 12, the wire diameter of the bristles 30a was changed to 0.3 mm, the amount of pressing of the bristles 30a was changed to 2 mm, and the conveying speed of the composite 14 was changed to 0.5 m/min, and the slurry of calcium carbonate was added. The glass plate 10 was regenerated in the same manner as in Example 1 except that the concentration was changed to 10% by mass.

[Example 4]

In the removal of the resin layer 12, the amount of pressing of the bristles 30a is changed to 2 mm, the conveying speed of the composite 14 is changed to 0.5 m/min, and the calcium carbonate concentration of the slurry is changed to 10% by mass. The glass plate 10 was regenerated in the same manner as in the first embodiment.

[Example 5]

In the removal of the resin layer 12, the wire diameter of the bristles 30a was changed to 0.3 mm, the amount of pressing of the bristles 30a was changed to 2 mm, and the conveying speed of the composite 14 was changed to 0.5 m/min, and the slurry of calcium carbonate was added. The glass plate 10 was regenerated in the same manner as in Example 1 except that the concentration was changed to 20% by mass.

[Embodiment 6]

In the removal of the resin layer 12, the wire diameter of the bristles 30a was changed to 0.3 mm, the amount of pressing of the bristles 30a was changed to 2 mm, and the conveying speed of the composite 14 was changed to 0.5 m/min, and the slurry of calcium carbonate was added. The glass plate 10 was regenerated in the same manner as in Example 1 except that the concentration was changed to 30% by mass.

[Comparative Example 1]

In the removal of the resin layer 12, a disc brush is used instead of the roller brush 30. The disc brush diameter of the disc brush It is 70 mm and is made of foaming urethane and has a thickness of 70 mm. The foaming urethane was 10 ° in terms of Shore E hardness.

Further, the number of revolutions of the disk brush was set to 200 rpm, the amount of press of the disk brush was set to 0.2 mm, and the conveyance speed of the composite 14 was set to 1.3 mm/min. Further, the number system was set to 20 times.

Except for this, the glass plate 10 was regenerated in the same manner as in the first embodiment.

[Comparative Example 2]

In the removal of the resin layer 12, a disk brush to which a polishing pad was attached to the surface of the disk brush used in Comparative Example 1 was used. The polishing pad was made of foamed urethane and had a thickness of 2 mm. The foaming urethane was 60° in Shore E hardness.

Further, the number of revolutions of the disk brush was set to 200 rpm, the amount of press of the polishing pad was set to 0.2 mm, and the conveyance speed of the composite 14 was set to 1.3 mm/min. Further, the number system was set to 20 times.

Except for this, the glass plate 10 was regenerated in the same manner as in the first embodiment.

[Comparative Example 3]

In the removal of the resin layer 12, a disc brush is used instead of the roller brush 30. The disc brush diameter of the disc brush It is 70mm and is made of nylon non-woven fabric and has a thickness of 20mm. The nylon nonwoven fabric was made of 0.05 mm nylon fiber and was 20° in Shore E hardness.

Further, the number of revolutions of the disk brush was set to 200 rpm, the amount of press of the disk brush was set to 0.2 mm, and the conveyance speed of the composite 14 was set to 1.3 mm/min. Further, the number system was set to 20 times.

Except for this, the glass plate 10 was regenerated in the same manner as in the first embodiment.

<evaluation>

The glass sheet 10 thus regenerated in this manner was evaluated for the removability of the resin layer 12, the strength of the glass sheet 10 before the removal of the resin layer 12, and the strength of the glass sheet 10 after polishing.

<Removability of Resin Layer 12>

The removability of the resin layer 12 was evaluated by visual observation. Specifically, the case where all of the resin layer 12 was removed was evaluated as ○; the case where the partial resin layer 12 remained was evaluated as Δ; and the case where the resin layer 12 remained on the entire surface was evaluated as ×.

<Strength of Glass Plate 10 (Ball Ring Method)>

The strength of the glass sheet 10 before and after the polishing of the resin layer 12 was removed, and the surface on which the resin layer 12 was removed was taken as a measurement surface, and measured by a ball on ring method.

The ball and ring method is carried out by placing the glass plate 10 on a stainless steel ring (cylinder) having a diameter of 30 mm and an arc having a curvature radius of 2.5 mm at the upper end so that the diameter is 10 mm. In the state in which the center of the steel ball contact ring is included, a load is applied to the ball under a static load condition, and the load (N) of the glass plate 10 is measured.

The results are shown in the following table.

In Comparative Example 1, a disk brush made of a foamed urethane having a Shore E hardness of 10° was used.

In Comparative Example 2, a polishing pad made of a foamed urethane having a Shore E hardness of 60° was attached to the disk brush of Comparative Example 1.

In Comparative Example 3, a disc brush made of nylon non-woven fabric having a Shore E hardness of 20° was used.

In Comparative Examples 1 to 3, the roll diameter was the diameter of the disk.

As shown in the above table, according to the present invention, the resin layer 12 can be removed from the composite body 14, and the glass sheet 10 having the same strength as that of the general abrasive glass and having a strength of about 300 N or more can be regenerated.

Further, in Example 1 and Example 2, the removability of the resin layer 12 was evaluated as Δ. However, since the resin layer 12 was removed by polishing, there was no practical problem. Further, since the resin layer 12 is removed by using a roller brush, the resin layer 12 of the entire surface can be smoothly and easily removed by changing conditions such as the amount of press, the number of revolutions, and the conveyance speed.

On the other hand, in Comparative Example 1, Comparative Example 2, and Comparative Example 3 in which the resin layer 14 was removed by using a disk brush made of a foaming urethane, the resin layer 14 remained on the entire surface, and thus the film layer 14 could not be carried out. Grinding of the glass plate 10.

The present application is based on Japanese Patent Application No. 2014-114037, filed on Jun.

[Industrial availability]

It can be suitably used for reuse of a glass plate of a composite body used in the manufacture of electronic devices.

Claims (7)

A method for regenerating a glass plate, characterized in that it is a resin layer remover formed on a glass plate, and includes a removing step of using a polishing agent to form a resin layer formed on the glass plate by a roller brush And a grinding step of grinding the surface of the removed resin layer of the glass plate from which the resin layer has been removed. The method for regenerating a glass sheet according to claim 1, wherein the step of placing a flaw on the surface of the resin layer before the step of removing is performed. The method for regenerating a glass sheet according to claim 1 or 2, wherein the bristles of the roller brush have a wire diameter of 0.2 mm or more. The method for regenerating a glass sheet according to any one of claims 1 to 3, wherein the removing step is a step of removing the resin layer using a slurry in which the polishing agent is dispersed, and a concentration of the abrasive in the slurry It is 10% by mass or more. The method for regenerating a glass sheet according to any one of claims 1 to 4, wherein the resin layer comprises a polyoxyn resin. The method for regenerating a glass plate according to claim 5, wherein the polyfluorene oxide resin is a hardening compound of an addition reaction type polyoxane, and the addition reaction type polyoxane is a linear organopolyoxane having the following ( a) a curable polyanthracene resin composition having a linear organopolyoxane (b): linear organopolyoxane (a): linear organic having at least 2 alkenyl groups per molecule a polyoxyalkylene; and a linear organopolyoxane (b): at least 3 hydrogen atoms bonded to a deuterium atom per molecule, and at least one hydrogen atom bonded to a deuterium atom is present in the molecule a linear organopolyoxane of a helium atom at the end; The resin layer is a cured polyoxyalkylene resin layer formed by curing the curable polyoxyxene resin composition on the surface of the glass plate. A glass plate reproducing device characterized in that the resin layer is formed on a glass plate, and includes: a removing device having a roller brush, a conveying mechanism, and an abrasive supply mechanism, which are formed on the glass plate The resin layer is removed, and the transfer mechanism relatively transports the roller brush and the glass plate having the resin layer, and the polishing agent supply mechanism further faces the roller brush and the roller brush that is relatively transported by the transport mechanism. At least one of the resin layers of the glass sheet is supplied with a slurry containing an abrasive; and a polishing apparatus for polishing the resin layer removal surface of the glass sheet obtained by removing the resin layer by the removal means.