JP2008137322A - Manufacturing method of resin plate having unevenly shaped part on surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a resin plate whose surface has an unevenly shaped part formed by a cut processing, which method can thoroughly smooth the cut-processed surfaces of the uneven shape part without changing the uneven shapes formed by the cut processing. <P>SOLUTION: The manufacturing method of the resin plate 10 having the unevenly shaped part on its surface comprises the step of forming the unevenly shaped part 2 on the surface of the resin plate by providing the resin plate surface with the cut processing, and the step of coating the surfaces 2a on the resin plate, formed in the unevenly shaped part 2, with a treating solution containing 0.5-3 parts by mass of a resin based on 100 parts by mass of a solvent by a drip coating method and then drying the surfaces. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manufacturing method capable of sufficiently smoothing a shaved surface of a concavo-convex shape portion when a resin plate having a concavo-convex shape portion on a surface is manufactured by performing a shaving process.

  As a method for processing a micron level uneven shape (triangular shape or the like) on the surface of a resin plate, a cutting process using a diamond bite, a grinding process using a diamond grindstone, a metal grindstone, or the like is known.

Further, as a method for making the unevenness (scratches) on the surface of the plastic lens invisible, there is known a method in which a lens substrate is heat-treated at a temperature of 50 to 150 ° C. (see Patent Document 1).
Japanese Patent Laid-Open No. 2002-22902

  However, when machined by the above cutting process, a very smooth machined surface can be obtained, but when machining with the same diamond tool for a long time, the cutting edge of the tool is roughened, which is the machined surface. It is feared that it will remain as fine streaks. In addition, even when the stage on which the workpiece is set is slightly shaken during the cutting process, there is a concern that fine streaks may enter the machined surface. If fine streaks remain on the machined surface of the resin plate in this way, the light incident on the machined surface is randomly scattered. It could not be used for applications.

  Further, when grinding is used, the shape is processed using the rotation of the blade, so that a trace of the rotation of the blade remains on the cut surface of the resin plate. When the blade rotation trace remains on the machined surface of the resin plate in this way, the light incident on the machined surface is randomly scattered and the machined surface of the resin plate becomes clouded. The resin plate could not be used for optical applications such as a prism sheet.

  Further, in laser processing, although the processing trace due to the contact of the cutting tool and the grindstone does not remain, there is a problem that the processing surface is roughened by the heat during the laser processing, and this resin plate is used as an optical material such as a prism sheet. It could not be used for applications.

  In addition, when the heating method of Patent Document 1 is applied to a resin plate having a concavo-convex shape portion having a concavo-convex height of about 1.0 to 800 μm formed on the surface by shaving, it is once formed by shaving. There has been a problem that the processed shape of the concavo-convex shape portion thus deformed is deformed by heat.

  The present invention has been made in view of such a technical background, and is a manufacturing method for forming a concavo-convex shape portion on the surface of a resin plate by shaving, and deforming the concavo-convex shape formed by the shaving process An object of the present invention is to provide a manufacturing method capable of sufficiently smoothing the shaving surface of the concavo-convex shape portion without causing the unevenness-shaped portion.

  In order to achieve the above object, the present invention provides the following means.

[1] A shaving step of forming a concavo-convex shape portion on the surface of the resin plate by shaving the surface of the resin plate;
A step of applying a treatment liquid containing 0.5 to 3 parts by mass of a resin to 100 parts by mass of the solvent on the surface of the resin plate on which the concavo-convex shape part is formed, and then drying the solution. ,
The manufacturing method of the resin board which has an uneven | corrugated shaped part on the surface characterized by including.

[2] A shaving step of forming a concavo-convex shape portion on the surface of the resin plate by shaving the surface of the resin plate;
Applying a treatment liquid containing 3 to 7 parts by mass of a resin to 100 parts by mass of the solvent on the surface of the resin plate on which the concavo-convex shape part is formed, followed by drying,
The manufacturing method of the resin board which has an uneven | corrugated shaped part on the surface characterized by including.

  [3] The method for producing a resin plate having a concavo-convex shape portion on the surface according to the item 1 or 2, wherein the shaving is cutting or grinding.

  [4] The method for producing a resin plate, wherein the concavo-convex shape portion has a concavo-convex shape portion on the surface according to any one of the above items 1 to 3, wherein the concavo-convex shape portion includes a plurality of triangular convex portions having a triangular cross-sectional shape.

  [5] The surface according to any one of the above items 1 to 4, wherein a resin having an absolute value of a difference in refractive index from the refractive index of the resin plate is 0.05 or less as the resin constituting the treatment liquid. The manufacturing method of the resin board which has an uneven | corrugated shaped part.

  [6] The resin having a concavo-convex shape portion on the surface according to any one of items 1 to 5 above, wherein in the shaving step, a concavo-convex height portion having a concavo-convex height of 1.0 to 800 μm is formed on the surface of the resin plate. A manufacturing method of a board.

  In the invention of [1], after applying a treatment liquid containing 0.5 to 3 parts by mass of a resin with respect to 100 parts by mass of a solvent on a shaved surface of an uneven shape part in a resin plate, Since it dries, the shaving surface of the concavo-convex shape portion can be sufficiently smoothed without deforming the concavo-convex shape formed by the shaving process.

  In the invention of [2], a treatment liquid containing 3 to 7 parts by mass of a resin with respect to 100 parts by mass of the solvent is applied to the shaving surface of the uneven part of the resin plate by a brush coating method and then dried. Therefore, the shaving surface of the concavo-convex shape portion can be sufficiently smoothed without deforming the concavo-convex shape formed by the shaving process.

  In the invention of [3], since the shaving is performed by cutting or grinding, it is possible to form an uneven shape portion with higher accuracy.

  In the invention of [4], since the concavo-convex shape portion is configured to include a large number of triangular convex portions having a triangular cross-sectional shape, the manufactured resin plate is suitable as, for example, a prism sheet or a light diffusion plate. .

  In the invention of [5], as the resin constituting the treatment liquid, a resin having an absolute value of the difference in refractive index from the refractive index of the resin plate of 0.05 or less is used. Scattering and refraction of light on the surface can be sufficiently suppressed, and light can be transmitted while sufficiently maintaining the intensity of incident light (excellent light transmission can be ensured).

  In the invention of [6], even in the case of forming a fine concavo-convex shape portion having a concavo-convex height of 1.0 to 800 μm, the processed surface of the concavo-convex shape portion is not deformed without deforming the concavo-convex shape formed by the shaving process. Can be sufficiently smoothed.

  The first manufacturing method of the present invention includes a shaving step of forming a concavo-convex shape portion on the surface of the resin plate by shaving the surface of the resin plate, and the concavo-convex shape portion (2) in the resin plate (1). And a step of applying a treatment liquid containing 0.5 to 3 parts by mass of a resin to 100 parts by mass of a solvent by a drip coating method and then drying the surface. To do.

  Moreover, the 2nd manufacturing method of this invention is a shaving process which forms an uneven | corrugated shaped part in the surface of the said resin board by shaving the surface of a resin board, and the said uneven | corrugated shaped part (in the said resin board (1) ( And a step of applying a treatment liquid containing 3 to 7 parts by mass of a resin to 100 parts by mass of a solvent on the surface on which 2) is formed, followed by drying. To do.

  In general, when the concavo-convex shape portion (2) is formed on the surface of the resin plate simply by subjecting the surface of the resin plate to cutting (cutting, grinding, laser processing, etc.), as shown in FIG. In addition, the machined surface (2a) of the concavo-convex shape portion (2) is a rough surface (non-smooth surface), and for this reason, it has been difficult to apply to optical applications in the past. In the said 1st manufacturing method, the process formed by containing 0.5-3 mass parts of resin with respect to 100 mass parts of solvent on the surface in which the said uneven | corrugated shaped part (2) in the said resin plate (1) was formed. Since the liquid is applied by the drip coating method and then dried, as shown in FIG. 1 (b), the concavo-convex shape portion (2) is shaved without deforming the concavo-convex shape formed by the shaving process. The surface (2a) can be sufficiently smoothed. In the second manufacturing method, a treatment liquid containing 3 to 7 parts by mass of a resin with respect to 100 parts by mass of the solvent is brushed on the surface of the resin plate (1) on which the uneven portion (2) is formed. Since it is dried after being applied by the coating method, as shown in FIG. 1B, the shaving surface (2a) of the concavo-convex shape portion (2) is sufficiently obtained without deforming the concavo-convex shape formed by the shaving process. Can be smoothed.

  In the first and second manufacturing methods, first, an uneven shape portion (2) is formed on the surface of the resin plate by performing a cutting process on the surface of the resin plate (a cutting step). The shaving surface (2a) of the concavo-convex shape portion (2) is a rough surface (non-smooth surface) as shown in FIG.

  In the present embodiment, the surface of the resin plate is cut to form an uneven shape portion (2) formed by projecting a plurality of triangular protrusions (7) having a triangular cross-sectional shape on the surface of the resin plate. (See FIG. 1). The triangular convex portion (7) is formed of a triangular convex portion (8) having a cross-sectional shape extending along one direction parallel to the surface of the resin plate, and the plurality of convex portions (8). The length directions are substantially parallel to each other (see FIG. 2).

  The resin plate to be machined is not particularly limited, and any type of resin plate can be used. For example, acrylic resin, polyethylene, polypropylene, polystyrene, ABS resin, polycarbonate and the like can be mentioned, but not particularly limited to those exemplified.

  Examples of the shaving include cutting, grinding, and laser processing, but are not particularly limited to these exemplified processes. However, since it is possible to form a highly accurate uneven shape when machining is performed by cutting or grinding, it is preferable to employ cutting or grinding.

  Although it does not specifically limit as said cutting process, For example, the cutting process using a diamond bit etc. are mentioned. The grinding process is not particularly limited, and examples thereof include a grinding process using a diamond grindstone, a metal grindstone, an alloy cutting tool, and the like.

  Examples of the cross-sectional shape of the concavo-convex shape portion (2) formed by the shaving process include a triangular shape (prism shape), a square shape (trapezoidal shape, etc.), other polygonal shapes, lenticular lens shapes, and other complicated concavo-convex shapes. However, it is not particularly limited to these exemplified shapes.

  The concavo-convex height (H) of the concavo-convex shape portion (2) formed by the shaving process is usually 1.0 to 800 μm.

  Next, in the 1st manufacturing method, 0.5-3 mass parts of resin is contained with respect to 100 mass parts of solvents in the surface in which the said uneven | corrugated shaped part (2) in the said resin plate (1) was formed. The treatment liquid is applied by a drip coating method and then dried. As the treatment liquid, a treatment liquid containing 0.5 to 3 parts by mass of a resin with respect to 100 parts by mass of the solvent is used. If the amount is less than 0.5 parts by mass, the concavo-convex shape portion (2) formed by the shaving process is likely to be subjected to the dissolving action by the solvent, and the concavo-convex shape portion is deformed to reduce the shape accuracy. On the other hand, when the amount exceeds 3 parts by mass, the resin component tends to accumulate in the groove portion of the concavo-convex shape portion, and the shape accuracy decreases. Among them, it is preferable to use a treatment liquid containing 0.8 to 2.5 parts by mass of a resin with respect to 100 parts by mass of the solvent.

  The drip coating method is a resin plate (1) in which a coating target surface is inclined with respect to a horizontal plane, and in this state, a treatment liquid is dropped onto one end side (upper end side) of the coating target surface. This is a method of coating the surface to be coated with a treatment liquid (see FIG. 3). In addition, when applying by this drip coating method, as shown in FIG. 3, the length direction of the ridge part (8) which consists of a triangular convex part (7) in the dripping direction (namely, up-down direction) of a process liquid is shown. It is preferable to apply in a substantially matched manner. In this case, the shaving surface (2a) of the concavo-convex shape portion (2) can be further smoothed.

  Moreover, in the 2nd manufacturing method, the process liquid formed by containing 3-7 mass parts of resin with respect to 100 mass parts of solvent on the surface in which the said uneven | corrugated shaped part (2) in the said resin plate (1) was formed. After applying by brushing, it is dried. As the treatment liquid, a treatment liquid containing 3 to 7 parts by mass of a resin with respect to 100 parts by mass of the solvent is used. If the amount is less than 3 parts by mass, the concavo-convex shape portion (2) formed by the shaving process is likely to be subjected to a dissolving action by the solvent, causing deformation of the concavo-convex shape portion and lowering the shape accuracy. On the other hand, when the amount exceeds 7 parts by mass, the resin component tends to accumulate in the groove portion of the concavo-convex shape portion, and the shape accuracy decreases. Especially, it is preferable to use the processing liquid which contains 4-6 mass parts of resin with respect to 100 mass parts of solvents.

  The brush coating method is a coating method in which the treatment liquid is soaked into a brush and applied using the brush.

  In the first production method and the second production method, the solvent is not particularly limited, and examples thereof include chloroform, methyl alcohol, benzene, and acetone. Among these, chloroform is preferably used because it is highly volatile and has a high drying rate.

  In addition, the resin constituting the treatment liquid is not particularly limited, and examples thereof include acrylic resin, polystyrene, polyethylene, polypropylene, ABS resin, and polycarbonate. Among them, as the resin constituting the treatment liquid, it is preferable to use a resin having an absolute value of a difference in refractive index from the refractive index of the resin plate (1) of 0.05 or less (including 0). In this case, in the obtained resin plate (10), the scattering and refraction of light on the surface of the uneven portion (2) can be sufficiently suppressed, and the intensity of incident light is sufficiently maintained. However, light is transmitted. As the resin constituting the treatment liquid, it is more preferable to use a resin having an absolute value of the difference in refractive index from the refractive index of the resin plate (1) of 0.03 or less, and a resin having a value of 0.01 or less. It is particularly preferable to use

  The drying method is not particularly limited, and examples thereof include a method of natural drying at a temperature of about 10 to 30 ° C. By this drying process, a resin coating film is formed on the shaved surface (2a) of the concavo-convex shape part (2), and a smoothing process is performed.

  The manufacturing method of the resin plate (10) having a concavo-convex shape portion on the surface according to the present invention is not particularly limited to the above embodiment, and does not depart from the spirit as long as it is within the scope of the claims. Any design changes are allowed as far as possible.

  Next, specific examples of the present invention will be described, but the present invention is not particularly limited to these examples.

<Example 1>
By subjecting the surface of an acrylic resin plate (refractive index 1.49) to a thickness of 2 mm to grinding, a triangular convex portion (a cross-sectional shape as shown in FIG. The uneven | corrugated shaped part (2) in which many protruding item | line parts (8) which consist of 7) protruded was formed. The apex angle (α) of this triangular convex part (7) is 90 degrees, the height (H) of the triangular convex part (7) is 150 μm, and the pitch interval (P) between adjacent triangular convex parts (7) is 300 μm. there were. The grinding process was performed with an alloy cutting tool (having a taper angle of 20 degrees) using a grinder manufactured by Technotech (FM1280 type).

  Next, a treatment liquid obtained by dissolving 1.0 part by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform on the surface of the resin plate (1) where the uneven part (2) is formed. Was applied by a drip coating method (see FIG. 3), and then naturally dried in a room at 20 ° C. to produce an optical member (10) as shown in FIG.

<Example 2>
An optical member was produced in the same manner as in Example 1 except that a treatment liquid prepared by dissolving 2.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Example 3>
An optical member was produced in the same manner as in Example 1 except that a treatment liquid obtained by dissolving 2.5 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Comparative Example 1>
An optical member was produced in the same manner as in Example 1 except that a treatment liquid prepared by dissolving 5.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Comparative example 2>
An optical member was produced in the same manner as in Example 1 except that a treatment liquid obtained by dissolving 10.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Comparative Example 3>
An optical member was produced in the same manner as in Example 1 except that a treatment liquid obtained by dissolving 0.2 part by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Example 4>
By subjecting the surface of an acrylic resin plate (refractive index 1.49) to a thickness of 2 mm to grinding, a triangular convex portion (a cross-sectional shape as shown in FIG. The uneven | corrugated shaped part (2) in which many protruding item | line parts (8) which consist of 7) protruded was formed. The apex angle (α) of this triangular convex part (7) is 90 degrees, the height (H) of the triangular convex part (7) is 150 μm, and the pitch interval (P) between adjacent triangular convex parts (7) is 300 μm. there were. The grinding process was performed with an alloy cutting tool (having a taper angle of 20 degrees) using a grinder manufactured by Technotech (FM1280 type).

  Next, a treatment liquid obtained by dissolving 5.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform on the surface of the resin plate (1) on which the uneven part (2) is formed. 2 was applied by a brush coating method and then naturally dried in a room at 20 ° C. to produce an optical member (10) as shown in FIG.

<Example 5>
An optical member was produced in the same manner as in Example 4 except that a treatment liquid obtained by dissolving 4.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Example 6>
An optical member was produced in the same manner as in Example 4 except that a treatment liquid obtained by dissolving 6.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Comparative Example 4>
An optical member was produced in the same manner as in Example 4 except that a treatment liquid obtained by dissolving 1.0 part by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Comparative Example 5>
An optical member was produced in the same manner as in Example 4 except that a treatment liquid obtained by dissolving 10.0 parts by mass of an acrylic resin (refractive index 1.49) with respect to 100 parts by mass of chloroform was used as the treatment liquid. .

<Comparative Example 6>
An optical member was produced in the same manner as in Example 4 except that a treatment liquid composed of chloroform was used as the treatment liquid.

  Each optical member obtained as described above was evaluated based on the following evaluation method. These results are shown in Table 1.

<Evaluation by observation of machined surface>
Using an ultra-deep microscope (manufactured by Keyence Corporation, ultra-deep color 3D shape measuring microscope VK-9500 type), the surface (uneven shape forming surface) and cross section of each optical member (resin plate) were observed, and the following evaluation criteria Based on the evaluation.

(Evaluation criteria for the shape of the groove in the uneven part)
As a result of cross-sectional observation, the cross-sectional shape of the groove is not sharp and is rounded, “×”, the cross-sectional shape of the groove is slightly rounded, “△”, and the cross-sectional shape of the groove is rounded Those with no sharpness were marked with “◯”.

(Evaluation criteria for the shape of the top of the uneven part)
As a result of cross-sectional observation, the cross-sectional shape of the top is not sharp and rounded, “X”, the cross-sectional shape of the top is slightly rounded, “△”, and the cross-sectional shape of the top is rounded Those with no sharpness were marked with “◯”.

(Smoothness)
“X” indicates that the inclined surface (surface corresponding to the machined surface 2a) constituting the triangular convex portion of the concavo-convex shape portion is not much different from that after the machining, and “△” indicates that the surface is smooth to some extent. “,” Which was sufficiently smoothed, was designated as “◯”.

  As is apparent from Table 1, the resin plates of Examples 1 to 6 manufactured by the manufacturing method of the present invention have sharp grooves and tops of the concavo-convex shape portion (the concavo-convex shape formed by the shaving process). In addition, the constituent surface of the concavo-convex shape portion was sufficiently smooth (the shaved surface of the concavo-convex shape portion was sufficiently smoothed).

  The surface (uneven shape forming surface) observation image of the resin plate (optical member) of Example 1 with an ultra-deep microscope is shown in FIG. 4B (right half of FIG. 4) and immediately after shaving (ie The surface observation image of the resin plate before application of the treatment liquid is shown in FIG. 4A (left half of FIG. 4). From the comparison of FIGS. 4 (a) and 4 (b), many streaks (longitudinal streaks) were observed on the surface of the resin plate immediately after the shaving process. It can be seen that no streaks are substantially observed on the surface of the resin plate after drying and a smooth surface is formed. In Example 1, the resin plate immediately after shaving (that is, before application of the treatment liquid) was not sufficiently transparent, but the resin plate after application and drying of the treatment liquid was sufficiently transparent. Had a good appearance.

  In addition, using an automatic goniophotometer (Murakami Color Research Laboratory, GP-230 type), light is incident on the surface of the resin plate (optical member) of Example 1 (uneven shape forming surface) at a predetermined angle. FIG. 5 (b) shows the result of measuring how the angular distribution of the intensity of transmitted light becomes when this is done. FIG. 5A is a graph obtained by examining the angular distribution of transmitted light intensity in the same manner for a resin plate immediately after shaving (that is, before application of the treatment liquid). The measurement was performed with the light beam stop being 1.7 mmφ, the intensity of the emitted light and the sensitivity of the received light being constant, and the light incident angle (IA) being 0 °.

  5 (a) and 5 (b), the resin plate (optical member) manufactured by the manufacturing method of the present invention transmits light with high intensity at a specific emission angle depending on the shape angle of the concavo-convex shape portion. You can see that As described above, when the manufacturing method of the present invention is applied, the transmitted light intensity of the resin plate can be improved, and as a result, the luminance as the optical member can be sufficiently improved.

  The resin plate (10) manufactured by the manufacturing method of the present invention has a machined surface (2a) that is sufficiently smoothed, and thereby has a concavo-convex shape portion (for example, a prism portion or the like) that has been subjected to highly accurate shape control. Since (2) is formed, it is preferably used as an optical member such as a prism sheet or a light diffusion plate, but is not particularly limited to such an application. Among them, it is particularly suitable as an optical member for an image display device such as a liquid crystal display device.

(A) is typical sectional drawing which shows the resin board immediately after giving the surface processing, (b) is typical sectional drawing which shows the resin board obtained through application | coating and drying of a process liquid further. . It is a typical perspective view which shows one Embodiment of the resin board obtained with the manufacturing method of this invention. It is explanatory drawing of the drip coating method. It is the surface (uneven | corrugated shape part formation surface) observation image of the resin board by an ultra-deep microscope, (a) is the surface observation image of the resin board just after shaving, (b) is resin obtained in Example 1 It is a surface observation image of a board (after application | coating and drying process of a process liquid). It is a graph which shows angle distribution of transmitted light intensity, (a) is the resin board immediately after giving a shaving process, (b) is the resin board (after application | coating and drying process of a process liquid) obtained in Example 1. FIG. It is a graph.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Resin board in which shaving process was given 2 ... Uneven shape part 2a ... Sharpening surface 7 ... Triangular convex part 8 ... Convex line part 10 ... Resin board smoothened by application | coating of a process liquid

Claims (6)

A shaving step of forming an uneven shape portion on the surface of the resin plate by shaving the surface of the resin plate;
A step of applying a treatment liquid containing 0.5 to 3 parts by mass of a resin to 100 parts by mass of the solvent on the surface of the resin plate on which the concavo-convex shape part is formed, and then drying the solution. ,
The manufacturing method of the resin board which has an uneven | corrugated shaped part on the surface characterized by including. A shaving step of forming an uneven shape portion on the surface of the resin plate by shaving the surface of the resin plate;
Applying a treatment liquid containing 3 to 7 parts by mass of a resin to 100 parts by mass of the solvent on the surface of the resin plate on which the concavo-convex shape part is formed, followed by drying,
The manufacturing method of the resin board which has an uneven | corrugated shaped part on the surface characterized by including.   The method for producing a resin plate having a concavo-convex shape portion on the surface according to claim 1, wherein the shaving process is a cutting process or a grinding process.   The method for producing a resin plate having a concavo-convex shape portion on the surface according to any one of claims 1 to 3, wherein the concavo-convex shape portion includes a large number of triangular convex portions having a triangular cross-sectional shape.   As a resin constituting the treatment liquid, a resin having an absolute value of a difference in refractive index from the refractive index of the resin plate of 0.05 or less is used. Of manufacturing a resin plate having a portion.   In the said cutting process, the uneven | corrugated shaped part with an uneven | corrugated height of 1.0-800 micrometers is formed in the surface of the said resin board of the resin plate which has an uneven | corrugated shaped part on the surface of any one of Claims 1-5. Production method.