JP2007331231A - Film for whiteboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film for a whiteboard which makes excellent the writing properties, erasability and antiglare properties of the whiteboard. <P>SOLUTION: The film 13 for the whiteboard is formed on the surface of a substrate 12 for the whiteboard and the film 13 is constituted by forming an activation energy beam cured type resin film layer 15 on the surface of a transparent plastic film 14. The activation energy beam cured type resin film layer 15 contains spherical particulates 16 and an activation energy beam cured type silicone resin 17. It is desirable that the thickness of the layer 15 is 1-8 μm and that the average particle diameter of the particulates 16 is 2-10 μm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a whiteboard film used as a surface material of a whiteboard, and more particularly to a whiteboard film that has excellent whiteboard writing properties, erasability and antiglare properties. .

  Conventionally, a sheet material having a required roughness whose surface is embossed is known. When this sheet material is attached to a predetermined substrate and used as a writing board, the writing property is improved by the embossed irregularities.

In addition, as a sheet | seat for whiteboards, what was disclosed by Unexamined-Japanese-Patent No. 2002-362092 or Unexamined-Japanese-Patent No. 2004-148589 is known, for example (refer patent document 1, 2).
JP 2002-362092 A JP 2004-148589 A

  In the writing board using the sheet material of the conventional example, since the marker adheres to the embossed uneven portion, there is a disadvantage that characters and the like are difficult to disappear when wiped with a cleaner. That is, the erasability of characters and the like is poor.

  In addition, the processing accuracy of embossing is not necessarily uniform, and unevenness may be formed unevenly due to differences in temperature during processing or the flexibility or thickness of the sheet material. In this case, the writing board, the erasability, the anti-glare property and the like of the writing board become non-uniform, and there arises a disadvantage that the writing board differs depending on the written part.

  Therefore, in the case of the conventional example, there is a problem that must be solved to improve the writing property, erasability, anti-glare property, etc. of the writing board and to make the performance uniform. .

  As a specific means for solving the problems of the conventional example, the present invention provides a whiteboard film formed on the surface of a whiteboard substrate, the whiteboard film having an active energy on the surface of a transparent plastic film. Provided is a film for whiteboard comprising a linear curable resin coating layer, wherein the active energy ray curable resin coating layer contains spherical fine particles and an active energy ray curable silicone resin. To do.

  The active energy ray-curable resin coating layer has a thickness in the range of 1 to 8 μm, and the average particle size of the fine particles is in the range of 2 to 10 μm. The energy ray curable resin coating layer is configured to contain the active energy ray curable silicone resin in the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the resin.

  The whiteboard film according to the present invention is a whiteboard film formed on the surface of a whiteboard substrate, and the whiteboard film is an active energy ray-curable resin coating layer on the surface of a transparent plastic film. The active energy ray curable resin coating layer contains spherical fine particles and an active energy ray curable silicone resin, so that the surface of the whiteboard has an extremely fine and uniform uneven shape. Will be formed. Therefore, the concavo-convex shape not only improves the writing property and erasability but also improves the antiglare property because the reflection of light diffuses. Furthermore, the active energy ray-curable resin coating layer is hard, has high scratch resistance, and exhibits various excellent effects that the surface of the whiteboard is hardly damaged.

  The active energy ray-curable resin coating layer has a thickness in the range of 1 to 8 μm, and the average particle size of the fine particles is in the range of 2 to 10 μm. The fine particles protrude uniformly on the surface by several μm. Therefore, since a very fine and uniform uneven shape is formed on the surface of the whiteboard, the writing property, the erasing property and the anti-glare property are improved, and there is an excellent effect that the performance becomes uniform.

  Furthermore, the active energy ray-curable resin coating layer contains the active energy ray-curable silicone resin in the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the resin, thereby allowing the surface of the whiteboard to Is formed with a slippery property, so that it has an excellent effect that the writing property and particularly the erasability are further improved.

  Next, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 is a cross-sectional view schematically showing an enlarged part of the whiteboard 11. The whiteboard 11 is provided with a whiteboard film 13 on the surface of the substrate 12 by a predetermined means such as adhesion.

  The substrate 12 is made of a metal material such as aluminum or steel or enamel, and is formed in a plate shape having a predetermined thickness, and the surface thereof is colored white or in a required color.

  The whiteboard film 13 is formed by forming an active energy ray-curable resin coating layer 15 on the surface of a transparent plastic film 14.

  The transparent plastic film 14 is a transparent plastic film. Specifically, examples thereof include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyester film, polyethylene film, polypropylene film, and cellophane.

The active energy ray curable resin is a hard coat resin that is cured by irradiating active energy rays such as ultraviolet rays. For example, a conventionally known hard coat resin such as an acrylic resin or a siloxane resin is used. An active energy ray-curable resin coating layer 15 is formed by adding a conventionally known additive such as a photopolymerization initiator to the hard coat resin and irradiating it with ultraviolet rays or the like by a predetermined method.
The active energy ray-curable resin coating layer 15 preferably has a thickness in the range of 1 to 8 μm. Further, the active energy ray curable resin coating layer 15 is hard, has high scratch resistance, and the surface of the whiteboard 11 is hardly damaged.

  The active energy ray-curable resin coating layer 15 contains spherical fine particles 16 having an average particle size in the range of 2 to 10 μm and an active energy ray-curable silicone resin 17.

  Specifically, the spherical fine particles 16 are spherical inorganic fine particles such as silica, alumina, titania, zirconia, mica, talc, or calcium carbonate.

As described above, the active energy ray-curable silicone resin 17 is a hard coat resin that is cured by irradiation with active energy rays such as ultraviolet rays, and a conventionally known silicone resin is used.
As described above, when the active energy ray-curable resin coating layer 15 contains the active energy ray-curable silicone resin 17, the surface is formed with lubricity.
The active energy ray-curable silicone resin 17 is desirably contained in the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin.

  In the whiteboard film 13 having such a configuration, the fine particles 16 protrude uniformly on the surface of the active energy ray-curable resin coating layer 15 by several μm. That is, since an extremely fine and uniform uneven shape is formed on the surface of the whiteboard 11, the writing property, the erasing property and the antiglare property are improved, and the performance is uniform. In addition, as for the uneven | corrugated shape formed in the surface of the active energy ray hardening-type resin coating layer 15, it is desirable that the roughness exists in the range of Ra = 0.5-1.5.

Next, Examples and Comparative Examples of the present invention will be described, and evaluations obtained in the respective examples will be shown. The writing instrument used was a solid marker (Kitpath (registered trademark): manufactured by Nippon Riken Kogyo Co., Ltd.).
In addition, the evaluation of “writeability” as the ease of writing is based on the smoothness when writing a circle of about 10 cm in diameter on a whiteboard five times in a normal writing state, that is, the lightness of writing. The evaluation was made in three stages: “good”, “normal”, and “bad”.
For the evaluation of “erasability” of drawn lines drawn on the whiteboard, use the cleaner (Dustless Cleaner (registered trademark): manufactured by Nihon Riken Kogyo Co., Ltd.) using the circle written in the above evaluation of “writing performance”. The unevenness of the erased surface when erased by two reciprocations was evaluated in three levels: “good”, “normal”, and “bad”.
The “antiglare property” was evaluated in two stages of “good” and “bad” by visually judging the light reflection state of the whiteboard.

  The thickness of the active energy ray-curable resin coating layer is in the range of 1 to 8 μm, the average particle size of the spherical fine particles is in the range of 2 to 10 μm, and the active energy ray-curable resin coating layer has an active energy ray-curable resin coating layer. The white board which adhered the film for white boards which silicone resin contains in the range of 0.1-20 weight part was used (refer FIG. 1).

  The whiteboard of Example 1 was evaluated as “writing property: good”, “erasability: good”, and “antiglare property: good”.

[Comparative Example 1]
The thickness of the active energy ray-curable resin coating layer is in the range of 1 to 8 μm, and the average particle size of the spherical fine particles exceeds 10 μm. The white board which adhered the film for white boards which resin contains in the range of 0.1-20 weight part was used (refer FIG. 2).

The whiteboard of Comparative Example 1 was evaluated as “writing property: normal”, “erasability: poor”, and “antiglare property: good”.
Therefore, as compared with the whiteboard film of Example 1, both the “writing property” and the “erasability” are lowered by increasing the average particle size of the fine particles.

[Comparative Example 2]
The thickness of the active energy ray-curable resin coating layer is in the range of 1 to 8 μm, the average particle size of the spherical fine particles is less than 2 μm, and the active energy ray-curable silicone resin is applied to the active energy ray-curable resin coating layer. The white board which adhered the film for white boards contained in the range of 0.1-20 weight part was used (refer FIG. 3).

The whiteboard of Comparative Example 2 was evaluated as “writing property: normal”, “erasability: good”, and “antiglare property: poor”.
Therefore, compared with the whiteboard film of Example 1, both the “writing property” and the “antiglare property” are reduced by reducing the average particle size of the fine particles.

[Comparative Example 3]
The thickness of the active energy ray-curable resin coating layer is in the range of 1 to 8 μm, the average particle size of the spherical fine particles is in the range of 2 to 10 μm, and the active energy ray-curable resin coating layer has an active energy ray-curable resin coating layer. The white board which adhere | attached the film for white boards which does not contain a silicone resin was used (refer FIG. 4).

The whiteboard of Comparative Example 3 was evaluated as “writing property: normal”, “erasability: poor”, and “antiglare property: good”.
Therefore, compared with the whiteboard film of Example 1, both the “writing property” and the “erasability” are lowered by not containing the active energy ray-curable silicone resin.

[Comparative Example 4]
The thickness of the active energy ray curable resin coating layer is in the range of 1 to 8 μm, the average particle size of the irregularly shaped fine particles is 4 μm, and the active energy ray curable silicone resin is applied to the active energy ray curable resin coating layer. The white board which adhered the film for white boards contained in the range of 0.1-20 weight part was used (refer FIG. 5).

The whiteboard of Comparative Example 1 was evaluated as “writing property: good”, “erasability: poor”, and “antiglare property: good”.
Therefore, compared with the whiteboard film of Example 1, the “erasability” is lowered by containing irregularly shaped fine particles.

Table 1 shows the evaluations obtained in each of Examples 1 and Comparative Examples 1 to 4 described above.

As described in Example 1 and Comparative Examples 1 to 4 above, when the average particle size of the fine particles is increased, the uneven shape formed on the surface of the whiteboard is increased. As a result, “writing property” and particularly “ "Erasability" decreases (see FIG. 2).
Further, when the average particle size of the fine particles is reduced, the uneven shape formed on the surface of the whiteboard is reduced, and as a result, both “writing property” and particularly “antiglare property” are reduced (see FIG. 3).
Further, since the active energy ray curable resin coating layer does not contain the active energy ray curable silicone resin, the slipperiness of the surface of the whiteboard is reduced, and as a result, "writing property" and particularly "erasability" are obtained. Both decrease (see FIG. 4).
Furthermore, by incorporating irregularly shaped fine particles instead of spherical fine particles, the uniformity of the irregular shape formed on the surface of the whiteboard is lost, and as a result, the “erasability” is particularly reduced. (See FIG. 5).

It is sectional drawing which expanded and showed roughly a part of whiteboard concerning this invention. 10 is a cross-sectional view schematically showing an enlarged part of a whiteboard according to Comparative Example 1. FIG. 10 is an enlarged schematic cross-sectional view of a part of a whiteboard according to Comparative Example 2. FIG. 10 is an enlarged schematic cross-sectional view of a part of a whiteboard according to Comparative Example 3. FIG. 10 is an enlarged schematic cross-sectional view of a part of a whiteboard according to Comparative Example 4. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 White board 12 Board | substrate 13 White board film 14 Transparent plastic film 15 Active energy ray-curable resin coating layer 16 Fine particle 17 Active energy ray-curable silicone resin

Claims (3)

A whiteboard film formed on the surface of a whiteboard substrate,
The whiteboard film is formed by forming an active energy ray-curable resin coating layer on the surface of a transparent plastic film,
The active energy ray-curable resin coating layer comprises spherical fine particles and an active energy ray-curable silicone resin. 2. The whiteboard according to claim 1, wherein the active energy ray-curable resin coating layer has a thickness in a range of 1 to 8 μm, and an average particle diameter of the fine particles is in a range of 2 to 10 μm. Film. The active energy ray-curable resin coating layer contains 0.1 to 20 parts by weight of an active energy ray-curable silicone resin with respect to 100 parts by weight of the resin. The whiteboard film as described.

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