JP2008191275A - Anti-dazzling brilliant film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-dazzling brilliant film which has a simple constitution, is excellent in anti-dazzling property and moreover effective design-wise. <P>SOLUTION: In the anti-dazzling brilliant film, a transparent film 4 of which the surface is provided with an infinity of semi-spherical protrusions 3 of a fine diameter is laminated on a color developing layer 2 made by incorporating pearl pigment to the transparent resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an antiglare glitter film.

Conventional bright films are generally known, for example, those obtained by depositing metal on a PET film, and transparent films containing a bright pigment (such as mica coated with titanium oxide). It has a beautiful metallic luster. Patent Document 1 discloses a technique in which a large number of thin film layers are stacked to generate an interference color. These have been used as decorative materials in various applications such as clothing, building materials and packaging materials. Further, as a film for antireflection or antiglare, a film in which an antireflection layer is laminated on a transparent film is known, and Patent Document 2 disperses translucent fine particles in the transparent film as an antireflection layer. Further, Patent Document 3 discloses a multilayer structure in which a number of layers having different refractive indexes are laminated as an antireflection layer.
Japanese Patent No. 2951890 Japanese Patent No. 3515401 Japanese Patent No. 3490241

  All of the conventional glitter films have a metallic feeling and are made to reflect interference colors, and are excellent in gloss. However, since the reflectance at the surface is too high, the reflection brightness is high, but it does not emit a reflected light with a gentle metallic feeling or a gentle interference color, so it is used in applications where anti-glare properties are required. It is unsuitable for the use which requires anti-glare property from the viewpoint of use of, or design nature. In addition, conventional anti-glare films have been used for the purpose of softening light reflection by sticking to the surface of CRT displays and liquid crystal display panels, but these anti-glare films only diffuse and reflect light. In particular, it has no design properties and cannot be used for decorative purposes.

  An object of the present invention is to solve such problems, and to provide an anti-glare glitter film that has a simple structure, is excellent in anti-glare properties, and is also effective in design.

The anti-glare glitter film according to claim 1 of the present invention is characterized in that a transparent film having innumerable hemispherical convex portions with minute diameters is laminated on the surface of the color developing layer.
The anti-glare glitter film according to claim 2 is characterized in that the coloring layer is formed of a transparent resin containing a glitter pigment or a glitter coloring film.

  The anti-glare glitter film according to claim 3 is characterized in that the transparent film is a transparent elastic resin, and the color developing layer is a transparent elastic resin containing a glitter pigment or an elastic glitter color developing film.

  As described above, the anti-glare glitter film of the present invention provides an anti-glare glitter film having a simple structure, low gloss, excellent anti-glare property, and effective in design at low cost. be able to. In addition, when the transparent film is a transparent elastic resin and the color developing layer is a transparent elastic resin containing a glitter pigment or an elastic glitter color developing film, it is possible to obtain a follow-up property as the fabric stretches.

Hereinafter, an embodiment of the present invention will be specifically described with reference to FIGS. 1 and 2.
In FIG. 1, reference numeral 1 denotes an antiglare glitter film of the present embodiment. This antiglare glitter film 1 has a transparent film 4 having innumerable hemispherical convex portions 3 with minute diameters on the surface of the color developing layer 2. Are made by laminating. This anti-glare glitter film 1 has an adhesive layer 5 applied to the back surface of the color developing layer 2 and is attached to an adherend 6 such as a fabric through the adhesive layer 5.

  FIG. 2 shows a manufacturing procedure of the antiglare glitter film 1 and a heat softening resin layer 8 such as polyethylene is laminated on a heat resistant sheet 7 such as polyethylene terephthalate film or paper shown in FIG. A base film 9 is used, and the base film 9 is heated in the vicinity of the melting point of the heat softening resin layer 8 to soften the heat softening resin layer 8 as shown in FIG. The microspheres 10 are spread over the softening resin layer 8, and the microspheres 10 are adhered to the heat softening resin layer 8. In such a state, the base film 9 is heated to a temperature exceeding the melting point of the thermosoftening resin layer 8 to melt the thermosoftening resin layer 8, and the microspheres 10 are about 30 to 70 in diameter with their own weight. % Is buried in the thermosoftening resin layer 8. The diameter of the microspheres 10 is related to the thickness of the thermosoftening resin layer 8 and is not particularly limited. However, those having a diameter in the range of 1 to 500 μm are easy to use, and the glass microspheres are used in terms of specific gravity and cost. A sphere can be preferably used. Then, after the microspheres 10 are embedded in the thermosoftening resin layer 8 as described above, the base film 9 is cooled to fix the microspheres 10 to the thermosoftening resin layer 8, and then FIG. 2 (C). The adhesive layer 11 is laminated by coating so as to cover the microspheres 10 from above the heat-softening resin layer 8 from which the microspheres 10 are exposed. Then, after the adhesive layer 11 is dried and cured, the adhesive film 11 is peeled from the heat-softening resin layer 8 together with the microspheres 10 as shown in FIG. As shown in FIG. 2E, innumerable concave portions 12 that are substantially hemispherical are formed on the surface of the conductive resin layer 8. As shown in FIG. 2 (F), the base film 9 thus obtained is transparent as shown in FIG. 2 (F) so as to completely fill the concave portion 12 from above the heat-softening resin layer 8 and to have an appropriate thickness from the upper end of the concave portion 12. The transparent film 4 is formed by solvent coating or melt extrusion coating using a resin. Thereafter, the coloring layer 2 is laminated on the transparent film 4 as shown in FIG. As a means for laminating the color developing layer 2, a method of laminating a transparent film 4 with a resin containing a colorant on the transparent film 4 by solvent coating or melt extrusion coating, or a glittering color developing film using an adhesive. A method of laminating on is adopted. As the colorant used for the color forming layer 2, a so-called bright pigment is generally used. When using a pigment generally referred to as a pearl pigment such as mica coated with titanium oxide as a bright pigment, it is necessary to coat the concave portion 12 so as to be almost completely filled when the transparent film 4 is formed. preferable. The reason is that the surface of the transparent film 4 opposite to the concave portion 14 is finished in a flat state, and the glitter pigments of the coloring layer 2 laminated on the transparent film 4 are arranged in a planar shape. Is preferable. As the bright pigment used in the color forming layer 2, in addition to a pigment called a pearl pigment, fine thin pieces of metal thin films, fine thin pieces of coherent thin films laminated in multiple layers, and the like can be used. When an opaque layer colored white or black is laminated on the color developing layer 2, the color of the glitter pigment is further enhanced, but the opaque layer is not always necessary. The color developing layer 2 may be a multilayer. As described above, the antiglare glitter film in which the coloring layer 2 is laminated on the transparent film 4 is peeled off from the base film 9 as shown in FIG. In actual use, after being peeled off from the base film 9 as shown in FIG. 2 (H), the adhesive layer 5 is laminated on the coloring layer 2 and the anti-glare glitter film is attached to various media. Alternatively, it is attached to clothing or the like via the adhesive layer 5 and sewn.

  By the way, if the transparent film 4 includes a transparent or translucent film and the color of the coloring layer 2 can be confirmed, the transparency indicated by the light transmittance is not particularly specified.

Next, specific examples of the present invention will be described. In addition, the Example shown here is an example to the last, Comprising: It is not necessarily limited to this Example.
(Example 1)
A base film obtained by laminating a polyethylene film having a thickness of 40 μm on a polyethylene terephthalate film having a thickness of 75 μm was heated at 120 ° C. for 3 minutes to soften the polyethylene film on the surface layer, and the average particle diameter was 60 μm. After the glass microspheres are spread on almost one surface and the glass microspheres are attached on the polyethylene film, the base film to which the glass microspheres are attached is heated at 140 ° C. for 2 minutes to melt the polyethylene film. About 50% of the diameter of the sphere was embedded in the polyethylene film part. Thereafter, the substrate film was cooled, and then the surface of the glass microspheres was washed with water to remove the glass microspheres not buried in the polyethylene film portion. Next, an acrylic resin is uniformly laminated with a thickness of 60 μm as an adhesive layer so as to cover the glass microspheres from above the polyethylene film from which the glass microspheres are exposed. Peeled off. As a result, a base film having an infinite number of hemispherical recesses with a radius of about 30 μm on the entire surface of the polyethylene film portion was obtained. Next, on the surface of the base film having the recesses, polycarbonate urethane resin is used as an isocyanate curing agent and dimethylformamide as a solvent, and the dry film thickness of the portion where the recesses are completely filled and protruded from the recesses is about 10 μm after drying. Were coated and dried and cured to form a transparent film. Further, a coating layer of pearl pigment mixed with 20 parts by mass with respect to 100 parts by mass of the resin using the same resin as the transparent film is coated on the transparent film so as to have a dry film thickness of about 10 μm, and dried and cured to form a coloring layer. Formed. Then, in order to attach the antiglare bright film comprising the transparent film and the color developing layer to the adherend, a dry film thickness of about 40 μm is obtained by using urethane adhesive as the adhesive layer from the color developing layer and dimethylformamide as the solvent. It was coated to become. Finally, the laminate composed of the transparent film, the coloring layer, and the adhesive layer was peeled off from the base film to obtain an antiglare bright film having innumerable hemispherical convex portions with minute diameters on the surface.
(Example 2)
The resin of the adhesive layer for adhering to the adherend is used instead of the polycarbonate urethane resin for forming the transparent film and color forming layer of Example 1 mixed with the polyether-urethane transparent elastic resin. A stretchable antiglare bright film was obtained in the same manner as in Example 1 except that the elastic urethane resin was used. In Example 2, it is also possible to use an elastic glossy coloring film as the coloring layer.
(Comparative Example 1)
The formation of recesses using the glass microspheres of Example 1 was omitted, and a bright film was obtained in the same manner as in Example 1 below using the base film obtained by laminating a polyethylene film on a polyethylene terephthalate film as it was. This was used as a film for comparison with Examples 1 and 2.

  Table 1 shows the evaluation results of Examples 1 and 2 and Comparative Example 1 described above. The antiglare property was evaluated using a gloss meter VG2000 manufactured by Nippon Denshoku Industries Co., Ltd., with a glossiness of 60 degrees according to JISZ8741.

表１に示す結果から明らかなように実施例１および２は比較例１と比較して光沢度が低く、防眩性に富むことが分かる。また、実施例２では布の伸縮に伴ない追随性を示した。

As is clear from the results shown in Table 1, it can be seen that Examples 1 and 2 have a lower gloss than Comparative Example 1 and are rich in antiglare properties. Moreover, in Example 2, the followability accompanying the expansion and contraction of the cloth was shown.

It is an expanded sectional view of the glare-proof glittering film in one embodiment of the present invention. It is a manufacturing-process figure of the same glare-proof glittering film.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-glare bright film 2 Color development layer 3 Hemispherical convex part 4 Transparent film 5 Adhesive layer 6 Adhering body 7 Heat resistant sheet 8 Thermosoftening resin layer 9 Base film 10 Microsphere 11 Adhesive layer 12 Recessed part

Claims (3)

An anti-glare glitter film characterized in that a transparent film having innumerable hemispherical convex portions with minute diameters is laminated on the color developing layer. 2. The antiglare glitter film according to claim 1, wherein the color development layer is formed of a transparent resin containing a glitter pigment or a glitter color development film. 2. The antiglare glitter film according to claim 1, wherein the transparent film is a transparent elastic resin, and the color developing layer is a transparent elastic resin containing a glitter pigment or an elastic glitter color developing film.

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