JP4494054B2 - COLOR FILTER SUBSTRATE, ITS LAMINATE AND USE THEREOF - Google Patents

Description

  The present invention relates to a color filter substrate that is used in a liquid crystal display device and the like and is advantageous at the time of storage and transfer, a laminate thereof, and a method of using the same.

  Usually, the color filter substrate is stored and transported in a state where protrusions such as a black matrix, a colored layer, a transparent conductive film layer, and a spacer are formed on the surface of the glass substrate.

Conventionally, when storing and transporting color filter substrates, box-shaped storage that allows color filter substrates to be stored in parallel at predetermined intervals so that the color filter substrates do not touch each other to protect the color filter substrate surface from scratches and damage. A container was used.
JP 2002-264992 A

  However, recently, manufacture of larger color filter substrates has been demanded. If these are stored at a predetermined interval as in the past, a larger storage container and storage space are required, and they are more easily broken by transportation. Therefore, in reality, it is difficult to store and transport the storage container as described above.

  Therefore, as a method for solving these problems, the applicant of the present application has previously proposed forming a removable protective layer on the surface of the color filter substrate. However, when a protective film having a flexible film quality is used as the protective layer, the protective film is not only deformed due to vibration or stress during conveyance by the condensation pack, but the protective film is lost. As a result, the color filter film surface may be damaged, and the reliability of the liquid crystal display device may be greatly reduced.

  The present invention protects a color filter substrate from scratches and breakage during transportation, and provides a color filter substrate that is advantageous for transporting even a large color filter substrate, a laminate thereof, and a method of using the same.

A first invention of the present application is characterized in that a protective layer having a Vickers hardness of 9.6 or more is provided on the surface of the color filter substrate on the colored layer side, and the protective layer is made of a water-soluble resin. It is a substrate.
According to a second aspect of the present invention, there is provided a protective layer having a Vickers hardness of 9.6 or more on the colored layer side surface and the back side surface of the color filter substrate, and the protective layer is made of a water-soluble resin. It is a filter substrate.

The third invention is a laminate in which a plurality of color filter substrates each provided with a protective layer having a Vickers hardness of 9.6 or more are laminated on the surface of the color filter substrate on the colored layer side. One color filter substrate is a laminate in which the protective layer of one color filter substrate and the back surface of the other color filter substrate are in contact with each other, and the protective layer is made of a water-soluble resin .
4th invention is a laminated body formed by laminating a plurality of color filter substrates provided with a protective layer having a Vickers hardness of 9.6 or more on the colored layer side surface of the color filter substrate, and adjacent color filter substrates. The laminate is characterized in that a spacer is interposed between the protective layer and the protective layer is made of a water-soluble resin .

Further, the fifth invention provides a step of providing a protective layer having a Vickers hardness of 9.6 or more on the colored layer side surface of the color filter substrate at the first point, and a color filter substrate provided with the protective layer, Two adjacent color filter substrates are stacked to form a laminate so that the protective layer of one color filter substrate and the back surface of the other color filter substrate are in contact with each other, and the first the laminate was formed at a point, a step of conveying from the first point to the second point, in the second point, comprising a step of removing the protective layer of the color filter substrate, the protective The layer is made of a water-soluble resin, and the step of removing the protective layer is a method of using a color filter substrate , wherein the layer is washed away with water .
In a sixth aspect of the present invention, at the first point, the step of providing a protective layer having a Vickers hardness of 9.6 or more on the surface of the color filter substrate on the colored layer side is adjacent to the color filter substrate provided with the protective layer. From the first point to the second point, a step of forming a laminated body by stacking a plurality of sheets while interposing a spacing member between the color filter substrates, and the laminated body formed at the first point. And a step of removing the protective layer of the color filter substrate at the second point, wherein the protective layer is made of a water-soluble resin, and the step of removing the protective layer is washed away with water. This is a method for using a color filter substrate.
According to a seventh aspect of the present invention, in the first point, a step of providing a protective layer having a Vickers hardness of 9.6 or more on the colored layer side surface and the back side surface of the color filter substrate, and a color provided with the protective layer A step of forming a laminate by laminating a plurality of filter substrates so that two adjacent color filter substrates are in contact with the protective layer of one color filter substrate and the back surface of the other color filter substrate; Transporting the laminate formed at the first point from the first point to the second point, and removing the protective layer of the color filter substrate at the second point. The method for using a color filter substrate is characterized in that the protective layer is made of a water-soluble resin .
According to an eighth aspect of the present invention, at the first point, a step of providing a protective layer having a Vickers hardness of 9.6 or more on the colored layer side surface and the back side surface of the color filter substrate, and a color filter provided with the protective layer A step of laminating a plurality of substrates with a spacing member between adjacent color filter substrates to form a laminate, and a laminate formed at the first point from the first point. A step of transporting to a second point, and a step of removing the protective layer of the color filter substrate at the second point, both of the protective layers being made of a water-soluble resin, and removing the protective layer. The process is a method of using a color filter substrate, characterized by rinsing with water .

  The color filter substrate of the present invention, a laminate thereof and a method for using the same can suppress film deformation due to vibration or stress during transportation, and therefore can avoid damage such as scratches and defects on the surface of the color filter substrate. Thereby, the conveyance efficiency of the color filter substrate is improved, and the display reliability of the liquid crystal display device is further improved.

  The color filter substrate used in the present invention is not particularly limited in the manufacturing method, and is used for a liquid crystal display device in which protrusions such as a black matrix, a colored layer, a transparent electrode, and a spacer are formed on a glass substrate as a basic configuration. Color filter substrate.

FIG. 1 shows an example of the color filter substrate of the present invention. A black matrix 5 and colored layers 7 a, 7 b and 7 c are formed on the glass substrate 3, a transparent electrode 9 is formed on the colored layer 7, and a spacer 11 is formed on the black matrix 5. Further, a protective layer 13 having a Vickers hardness of 9.6 or more is formed so as to cover the spacer 11.
FIG. 2 shows another example of the color filter substrate of the present invention. A black matrix 5 and colored layers 7 a, 7 b and 7 c are formed on the glass substrate 3, a transparent electrode 9 is formed on the colored layer 7, and a spacer 11 is formed on the black matrix 5. Further, a protective layer 13 having a Vickers hardness of 9.6 or more is formed so as to cover the spacer 11, and a protective layer 15 is formed on the back surface of the glass substrate 3.

  In the present invention, a soluble protective layer having a Vickers hardness of 9.6 or more is provided on the surface of the color filter substrate on the colored layer side. Further, a soluble protective layer having a Vickers hardness of 9.6 or more is provided on the colored layer side surface and the back side surface of the color filter substrate, respectively. When a protective layer having a Vickers hardness of less than 9.6 is used, the protective layer is deformed or lost when the color filter substrate is transported, so that the color filter film surface is also damaged.

  The Vickers hardness referred to in the present invention is a value at a load of 5 mN in an atmosphere at room temperature of 23 ° C. In the present invention, a sample to be measured having a film thickness of 6 to 7 μm formed on a transparent glass having a thickness of 0.7 mm using a quadrangular pyramidal indenter is loaded at a load speed of 0.5 mN / sec over 10 seconds. After reaching 5 mN, the load was kept at 5 mN for 5 seconds, and then unloading was performed for 10 seconds at an unloading speed of 0.5 mN / second, and the Vickers hardness was calculated.

  The Vickers hardness of the protective layer can be adjusted by selecting a resin material, setting a drying temperature when forming the protective layer, and the like.

  The protective layer of the present invention preferably has a certain thickness from the viewpoint of protection performance, and does not interact with the colored layer, the transparent electrode, etc., and the protective layer of the present invention is temporary protection. It must be something that can be removed relatively easily later.

  The protective layer of the present invention is made of a water-soluble resin, an alkali-soluble resin, or a solvent-soluble resin. The water-soluble resin mainly comprises partially saponified polyvinyl acetate (generally referred to as “polyvinyl alcohol” and hence referred to as “polyvinyl alcohol”), an acrylic resin having a hydroxyl group, a cellulose resin, or a polyvinylpyrrolidone resin. The alkali-soluble resin is preferably an acrylic copolymer having a hydroxyl group and a carboxylic acid group in the side chain, or a hydroxyl group and carboxylic acid group-modified epoxy / urethane / polyester acrylate. Particularly preferred in the present invention is polyvinyl alcohol.

Moreover, when using the said water-soluble resin, alkali-soluble resin, or solvent-soluble resin as a protective layer, you may include a space | gap in a resin layer. The void referred to in the present invention can be obtained by introducing bubbles into the water-soluble resin, alkali-soluble resin or solvent-soluble resin with an air atomizing nozzle or the like. Further, a resin having bubbles inside such as urethane, a resin in which hollow resin beads are dispersed, or the like can be used.
By including voids in the resin layer, the protective effect is increased, and when the protective layer is removed, the penetration of the liquid is improved and the removal is facilitated. Further, since the specific gravity is lowered, the material cost can be reduced.

  The method for forming the protective layer of the present invention is not particularly limited, and methods such as dip coating, roll coating, squeegee coating, die coating and spraying can be used, and roll coating is particularly preferable.

  The thickness of the protective layer of the present invention is not particularly limited, but is preferably 3 to 100 μm, particularly preferably 5 to 20 μm from the viewpoint of protection performance.

  3-6 is sectional drawing which shows an example of the laminated body of this invention. FIG. 3 shows a color filter substrate 1 of the present invention in which a protective layer is provided on the surface of a plurality of colored layers, the protective layer 13 of the color filter substrate 1 and the glass substrate 3 of the adjacent color filter substrate 1 in contact with each other. FIG. 4 shows an example in which the color filter substrate 1 of the present invention in which the protective layer 13 is provided on the surface of the plurality of colored layers is provided, and a separating body 21 is provided between adjacent color filter substrates. This is an example of stacking. FIG. 5 shows a color filter substrate 1 of the present invention in which protective layers 13 and 15 are provided on a plurality of colored layer side surfaces and a back side surface, respectively, and a color layer adjacent to the protective layer 13 of the color filter substrate 1. FIG. 6 shows an example in which the protective layer 15 of the filter substrate 1 is laminated so as to be in contact with each other. FIG. Is an example in which a separating member 21 is provided between adjacent color filter substrates and stacked.

  The laminate of the present invention is formed by laminating a plurality of color filter substrates provided with a protective layer on the surface of the colored layer of the present invention, and two adjacent color filter substrates are connected to the protective layer of one color filter substrate. The other color filter substrate is brought into contact with the back surface.

  In the laminate of the present invention, an adhesive film or a coating layer is preferably provided as a protective layer on the back surface of the color filter substrate. Further, a paper or a resin film may be sandwiched between the adjacent color filter substrates as a spacer. The protective layer on the back surface needs to be removable after transport.

  As the pressure-sensitive adhesive film, a film having a pressure-sensitive adhesive on the surface of the base material or a co-pressing film of the base material and the pressure-sensitive adhesive is used. The base material used in the present invention is polyethylene, polyethylene terephthalate, or the like, and the pressure-sensitive adhesive is rubber-based or acrylic-based. Particularly preferably, the base material is polyethylene and the pressure-sensitive adhesive is rubber-based.

  The coating layer as the protective layer on the back surface is a soluble protective layer having a Vickers hardness of 9.6 or more, and is made of a water-soluble resin, an alkali-soluble resin, or an organic solvent-soluble resin. The water-soluble resin can be suitably used with polyvinyl alcohol, an acrylic resin having a hydroxyl group, a cellulose resin, or a polyvinylpyrrolidone resin as a main component, and the alkali-soluble resin is an acrylic copolymer having a hydroxyl group and a carboxylic acid group in the side chain. A coalescence or a hydroxyl group and a carboxylic acid group-modified epoxy / urethane / polyester acrylate can be preferably used.

  Although the thickness of the coating layer as a protective layer on the back surface of the present invention is not particularly limited, it is preferably 3 to 100 μm, particularly preferably 5 to 20 μm from the viewpoint of protective performance.

  The spacer is paper or a resin film. The paper used in the present invention is particularly preferably neutral paper, and the neutral paper referred to in the present invention is pH 6.5 to 7.0 (pH measurement is based on JISP 8133). Moreover, a nonwoven fabric can also be used conveniently. As the resin film used in the present invention, those made of polyethylene, polypropylene, polyethylene terephthalate, polyvinyl alcohol or cellulose can be suitably used, and polyethylene is particularly preferable.

The thickness of the separating body, particularly without limitation, considering the performance aspect, in the case of paper, preferably 25 to 50 g / m ^2, particularly preferably 50 g / m ² or so, if the resin film Is preferably from 25 to 100 μm, particularly preferably about 50 μm.

  The size of the spacer may be the same as or slightly larger than the color filter substrate. Particularly preferably, one of the vertical and horizontal lengths of the spacing member is larger than the color filter substrate and the other is smaller than the color filter substrate. As a result, the workability during packing and unpacking is improved.

Next, a method for using the color filter substrate of the present invention will be described.
The color filter substrate is usually transported to a liquid crystal display device manufacturer in a state where protrusions such as a black matrix, a colored layer, a transparent electrode and a spacer are formed on a glass substrate.

  The present invention is a first point for producing a color filter substrate. After forming protrusions such as a black matrix, a colored layer, a transparent electrode and a spacer on a glass substrate, the present invention is applied to the colored layer side of the color filter substrate. A soluble protective layer having a Vickers hardness of 9.6 or more according to the present invention is provided, a protective layer is provided on the back surface of the color filter substrate as necessary, and a plurality of color filter substrates provided with the protective layer are connected to adjacent color filter substrates. The laminated body of the present invention is stacked with or without sandwiching the spacing member therebetween, and is transported to the second point, and the protective layer is removed at the second point.

  The first point referred to in the present invention is a concept including a factory for manufacturing a color filter substrate or a site adjacent thereto, and the second point is a product using a color filter substrate such as a liquid crystal display manufacturer. It is a concept that includes the factory or the site adjacent to it.

  The method for removing the protective layer of the present invention varies depending on the type of the protective layer.

  When the protective layer is a water-soluble resin layer, the removal is performed by washing the protective layer with water.

  When the protective layer is an alkali-soluble resin layer, the removal is performed by washing the protective layer with an alkaline aqueous solution. As the alkaline aqueous solution, a potassium hydroxide aqueous solution is particularly preferably used.

  When the protective layer is an organic solvent-soluble resin layer, the removal is performed by washing with an organic solvent.

  The method of cleaning with water, alkaline aqueous solution or organic solvent performed in the present invention is not particularly limited, dip cleaning performed by immersing in the cleaning liquid, showering the cleaning liquid, brush cleaning using a roll brush or cup brush, Spray cleaning by high-pressure spray or ultrasonic cleaning is possible. If necessary, a step of removing a trace amount of residue by ultraviolet irradiation treatment or the like after various washings may be included.

  When the protective layer is an adhesive film, the removal is performed by peeling. When the adhesive remains, it may include steps such as washing with water, an alkaline aqueous solution or an organic solvent, and further an ultraviolet irradiation treatment, if necessary.

Hereinafter, it demonstrates in detail based on an Example.
10% aqueous solution of polyvinyl alcohol (Nippon Synthetic Chemical Co., Ltd. Gohsenol (NK-05) physical properties are shown in Table 1) on the colored layer side of the color filter substrate formed on a glass of 1500 mm in length and 1800 mm in width Was applied with a roll coater and then dried in an oven set at 80 ° C. for 30 minutes to obtain a protective layer comprising a coating layer having a thickness of about 5 μm. Next, HP-25 (PE / rubber adhesive) manufactured by Sanei Kaken Co., Ltd. was laminated on the glass surface of the color filter substrate as a protective layer on the back side.
The color layer surface protected by the coating layer and the laminate are placed on a dedicated pallet capable of storing 200 color filter substrates, the color layer surface of which is protected by the coating layer and the glass surface of which is laminated and protected, at an inclination of 15 degrees from the vertical state. It was stored in contact with the protected back surface.
Thereafter, a stretch film was wound for the purpose of blocking the outside air and preventing the collapse of the load, and the laminate was transported for transporting the color filter substrate.
As a result, the packing efficiency of the color filter substrate can be improved, the movement of the color filter substrate during transportation can be restricted, and the influence on the substrate such as cracks due to vibration during transportation can be avoided.
At the transport destination, the protective layer on the back surface was peeled off, and the coating layer was washed with pure water to remove the protective layer.
Thereafter, when the substrate was observed, no scratches or dirt were generated on the color filter substrate film surface.
In addition, it was 9.6 when the Vickers hardness of the coating layer with a film thickness of 6.5 micrometers after drying separately produced on the transparent glass simultaneously with the present Example was measured.
Vickers hardness is measured using a Vickers indenter (square pyramid shape) of an ultra-small hardness tester (Fischer Scope H-100 manufactured by Fischer Instruments Co., Ltd.) in an atmosphere at room temperature of 23 ° C. At this time, after reaching a load of 5 mN over 10 seconds at a load speed of 0.5 mN / second, the load was kept at 5 mN for 5 seconds, and then 10 seconds at an unloading speed of 0.5 mN / second. The Vickers hardness was calculated from the amount of film deformation at this time.

In the same manner as in Example 1 except that the drying temperature at the time of forming the coating layer in Example 1 was 90 ° C. and 100 ° C., respectively, a protective layer composed of the coating layer and the back surface protective layer was formed on the color filter substrate, It was conveyed as a laminate.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer measured in the same manner as in Example 1.

GOHSENOL (NK-05) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. in Example 1 was replaced with GOHSENOL (KM-11) (physical properties are shown in Table 1), and the drying temperatures at the time of forming the coating layer were 70 ° C. and 80 ° C., respectively. A protective layer was formed on each color filter substrate in the same manner as in Example 1 except that the temperature was 90 ° C., 90 ° C., and 100 ° C., and the laminate was transported.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer measured in the same manner as in Example 1.

GOHSENOL (NK-05) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. in Example 1 was replaced with GOHSENOL (GL-05) (physical properties are shown in Table 1), and the drying temperature at the time of forming the coating layer was 70 ° C. and 80 ° C. A protective layer was formed on each color filter substrate in the same manner as in Example 1 except that the temperature was 90 ° C. and 100 ° C., and the laminate was transported.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer measured in the same manner as in Example 1.

GOHSENOL (NK-05) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. in Example 1 was replaced with GOHSENOL (GH-17) (physical properties are shown in Table 1), and the drying temperature at the time of forming the coating layer was 60 ° C and 70 ° C. A protective layer was formed on each color filter substrate in the same manner as in Example 1 except that the temperature was 80 ° C., 90 ° C., and 100 ° C., and the laminate was transported.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer of Example 5 measured in the same manner as in Example 1.

GOHSENOL (NK-05) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. in Example 1 is replaced with GOHSENOL (GH-23) (physical properties are shown in Table 1), and the drying temperature in forming the coating layer is 60 ° C and 70 ° C. A protective layer was formed on each color filter substrate in the same manner as in Example 1 except that the temperature was 80 ° C., 90 ° C., and 100 ° C., and the laminate was transported.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer of Example 6 measured in the same manner as in Example 1.

GOHSENOL (NK-05) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. in Example 1 was replaced with GOHSENOL (AL-06) (physical properties are shown in Table 1), and the drying temperature at the time of forming the coating layer was 60 ° C and 70 ° C. A protective layer was formed on each color filter substrate in the same manner as in Example 1 except that the temperature was 80 ° C., 90 ° C., and 100 ° C., and the laminate was transported.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer of Example 7 measured in the same manner as in Example 1.

GOHSENOL (NK-05) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. in Example 1 is replaced with GOHSENOL (P-610) (physical properties are shown in Table 1), and the drying temperature at the time of forming the coating layer is 60 ° C and 70 ° C. A protective layer was formed on each color filter substrate in the same manner as in Example 1 except that the temperature was 80 ° C., 90 ° C., and 100 ° C., and the laminate was transported.
As a result, no scratches or dirt were generated on the color filter substrate film surface from which the protective layer was peeled off.
Table 2 shows the Vickers hardness of the coating layer of Example 8 measured in the same manner as in Example 1.

[Comparative Example 1]
A protective layer composed of a coating layer and a back surface protective layer is formed on the color filter substrate in the same manner as in Example 1 except that the drying temperature in forming the coating layer in Example 1 is 60 ° C. and 70 ° C. Carried as a body.
When the substrate was observed at the transport destination, the color filter substrate dried at any temperature showed depression and cracks on the surface of the coating layer in some areas.
Thereafter, the protective layer was removed in the same manner as in Example 1, and the substrate was observed. In any color filter substrate dried at any temperature, defects in the color filter layer were confirmed in a part of the color filter substrate film surface. It was.
Table 3 shows the Vickers hardness of the coating layer of Comparative Example 1 measured in the same manner as in Example 1.

[Comparative Example 2]
A protective layer comprising a coating layer and a back surface protective layer is formed on the color filter substrate in the same manner as in Example 2 except that the drying temperature at the time of forming the coating layer in Example 2 is 60 ° C., and transported as a laminate. The protective layer was peeled off at the transport destination.
As a result, a defect of the color filter layer was confirmed in a part of the color filter substrate film surface from which the protective layer was peeled off.
Table 3 shows the Vickers hardness of the coating layer of Comparative Example 2 measured in the same manner as in Example 1.

[Comparative Example 3]
A protective layer comprising a coating layer and a back surface protective layer is formed on the color filter substrate in the same manner as in Example 3 except that the drying temperature at the time of forming the coating layer in Example 3 is 60 ° C., and transported as a laminate. The protective layer was peeled off at the transport destination.
As a result, a defect of the color filter layer was confirmed in a part of the color filter substrate film surface from which the protective layer was peeled off.
Table 3 shows the Vickers hardness of the coating layer of Comparative Example 3 measured in the same manner as in Example 1.

It is sectional drawing which shows an example of the color filter substrate of this invention. It is sectional drawing which shows an example of the color filter substrate of this invention. It is explanatory drawing which shows an example of the laminated body of this invention. It is explanatory drawing which shows an example of the laminated body of this invention. It is explanatory drawing which shows an example of the laminated body of this invention. It is explanatory drawing which shows an example of the laminated body of this invention. It is explanatory drawing which shows the result in an Example and a comparative example.

Explanation of symbols

1 ... Color filter substrate 3 ... Glass substrate 5 ... Black matrix 7a ... Colored layer (R)
7b: Colored layer (G)
7c ......... Colored layer (B)
9 ......... Transparent electrode 11 ......... Spacer 13 ......... Protective layer 15 ......... Protective layer 21 ......... Separator 31 ......... Laminated body

Claims (14)

A protective layer having a Vickers hardness of 9.6 or more is provided on the colored layer side of the color filter substrate.
The color filter substrate , wherein the protective layer is made of a water-soluble resin . A protective layer having a Vickers hardness of 9.6 or more is provided on the colored layer side surface and the back side surface of the color filter substrate,
The color filter substrate , wherein the protective layer is made of a water-soluble resin . 3. The color filter substrate according to claim 1 , wherein the water-soluble resin contains a partially saponified polyvinyl acetate as a main component. 3. The color filter substrate according to claim 1 , wherein the water-soluble resin is mainly composed of an acrylic resin having a hydroxyl group, a cellulose resin, or a polyvinylpyrrolidone resin. A layered product in which a plurality of color filter substrates each having a protective layer having a Vickers hardness of 9.6 or more is laminated on the colored layer side of the color filter substrate, and two adjacent color filter substrates are The protective layer of the color filter substrate is in contact with the back surface of the other color filter substrate,
The laminated body , wherein the protective layer is made of a water-soluble resin . A laminate in which a plurality of color filter substrates each having a protective layer having a Vickers hardness of 9.6 or more provided on the colored layer side surface of the color filter substrate, wherein a spacing member is provided between adjacent color filter substrates. Intervene,
The laminated body , wherein the protective layer is made of a water-soluble resin . The said water-soluble resin is a laminated body of Claim 5 or Claim 6 which has a partially saponified polyvinyl acetate as a main component. The laminate according to claim 5 or 6 , wherein the water-soluble resin is mainly composed of an acrylic resin having a hydroxyl group, a cellulose resin, or a polyvinylpyrrolidone resin. The laminate according to claim 6 , wherein the spacer is paper or a resin film. The laminate according to claim 6 , wherein the spacer is polyethylene terephthalate or polyethylene. At the first point, a step of providing a protective layer having a Vickers hardness of 9.6 or more on the surface of the color filter substrate on the colored layer side, and a color filter substrate provided with the protective layer are composed of two adjacent color filter substrates. Is a step of forming a laminate by laminating a plurality of sheets so that the protective layer of one color filter substrate and the back surface of the other color filter substrate are in contact with each other;
Transporting the laminate formed at the first point from the first point to a second point;
Removing the protective layer of the color filter substrate at the second point,
The method for using a color filter substrate, wherein the protective layer is made of a water-soluble resin, and the step of removing the protective layer is washed away with water . In the first point, the step of providing a protective layer having a Vickers hardness of 9.6 or more on the surface of the color filter substrate on the colored layer side, and the color filter substrate provided with the protective layer between the adjacent color filter substrates A step of forming a laminate by laminating a plurality of sheets while interposing a spacing member;
Transporting the laminate formed at the first point from the first point to a second point;
Removing the protective layer of the color filter substrate at the second point,
The method for using a color filter substrate, wherein the protective layer is made of a water-soluble resin, and the step of removing the protective layer is washed away with water . At the first point, the step of providing a protective layer having a Vickers hardness of 9.6 or more on the colored layer side surface and the back side surface of the color filter substrate and the color filter substrate provided with the protective layer are adjacent to each other. Two color filter substrates, a step of forming a laminate by laminating a plurality of sheets so that the protective layer of one color filter substrate and the back surface of the other color filter substrate are in contact with each other;
Transporting the laminate formed at the first point from the first point to a second point;
Removing the protective layer of the color filter substrate at the second point,
The method for using a color filter substrate, wherein the protective layer is made of a water-soluble resin . At the first point, a step of providing a protective layer having a Vickers hardness of 9.6 or more on each of the colored layer side surface and the back side surface of the color filter substrate, and the color filter substrate provided with the protective layer, A step of forming a laminate by laminating a plurality of sheets while interposing a separating body between the filter substrates;
Transporting the laminate formed at the first point from the first point to a second point;
Removing the protective layer of the color filter substrate at the second point,
A method of using a color filter substrate , wherein both the protective layers are made of a water-soluble resin, and the step of removing the protective layers is washed away with water .

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