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Retroreflection sheet

A technology of retroreflection and specular reflection, applied in optics, instruments, optical components, etc., can solve the problems of weather resistance and durability, and achieve the effect of excellent durability and excellent visibility

Active Publication Date: 2008-01-30
NIPPON CARBIDE KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the reasons explained above, the above-mentioned highly flexible resins, such as vinyl chloride resin and polyurethane resin, are relatively lacking in weather resistance and durability, so they are not suitable for signs such as road signs and engineering signs, automobiles, motorcycles, etc. Applications that require durability, such as license plates of vehicles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0277] A transparent polyethylene terephthalate film (trade name, Teijin Tetron Film S-75) manufactured by Teijin Co., Ltd. with a thickness of 75 μm was used as a carrier film, and the mixed solution was coated on it, and then dried, and set to dry. A surface layer (1) with a thickness of 18 μm (see FIG. 4 ). Wherein said mixed solution is that the number of substitutions of the formaldehyde prepared by 100 parts by weight of Japan Ka-Baido Industry Co., Ltd.'s acrylic resin solution (trade name, Nitsuset RS-1200) and 14 parts by weight of the company's three and chemical preparation is 6 21.1 parts by weight of methyl isobutyl ketone and 5.3 parts by weight of toluene were added as a solvent to a methylated melamine resin solution (trade name, Nikarak MS-11), and stirred and mixed. Wherein the acrylic resin solution is a copolymer with a weight average molecular weight of about 250,000 of ethyl acrylate / methyl methacrylate / 2-hydroxyethyl methacrylate (weight ratio 65 / 21 / 14) ...

Embodiment 2

[0291] A transparent polyethylene terephthalate film (trade name, Teijin Tetron Film S-75) manufactured by Teijin Co., Ltd. with a thickness of 75 μm was used as a carrier film, and the mixed solution was coated on it, and then dried, and set to dry. A surface layer (1) with a thickness of 18 μm (see FIG. 6 ). Wherein said mixed solution is the methylated melamine resin solution (trade name, Nitsuset RS-1200) prepared by 100 parts by weight of Japan Ka-Baido Industry Co., Ltd. and the methylated melamine resin solution prepared by Sanwa Chemical Co., Ltd. of 14 parts by weight (trade name, Nicaratsu MS-11) was added as a solvent, 21.1 parts by weight of methyl isobutyl ketone, and 5.3 parts by weight of toluene, and stirred and mixed.

[0292] Then, the mixed solution was applied on the above-mentioned surface layer and dried to form a holding layer (2) having a thickness of 27 μm after drying. Wherein said mixed solution is an acrylic resin solution (trade name, Nitsuset RS-...

Embodiment 3

[0304] A transparent polyethylene terephthalate film (trade name, Teijin Tetron Film S-75) manufactured by Teijin Co., Ltd. with a thickness of 75 μm was used as the process film, and the mixed solution was coated on it with a coater, followed by drying , and provided a dried surface layer (1) having a thickness of 18 μm (see FIG. 7 ). Wherein said mixed solution is the methylated melamine resin solution (trade name, Nitsuset RS-1200) prepared by 100 parts by weight of Japan Ka-Baido Industry Co., Ltd. and the methylated melamine resin solution prepared by Sanwa Chemical Co., Ltd. of 14 parts by weight (trade name, Nicaratsu MS-11) was added as a solvent, 21.1 parts by weight of methyl isobutyl ketone, and 5.3 parts by weight of toluene, and stirred and mixed.

[0305] Further, the mixed liquid was applied on the above-mentioned surface layer (1), and then dried to form a holding layer (2) having a thickness of 27 μm after drying. Wherein said mixed solution is an acrylic res...

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Abstract

An encapsulated lens type retroreflection sheet comprising at least a large number of micro glass balls (3), a light-transmitting resin holding layer (2) for holding the glass balls (3), a mirror reflection layer (6) for reflecting incident light, at least one focal point formation layer (4) of light-transmitting resin arranged between the glass balls (3) and the mirror reflection layer (6), and the mirror reflection layer (6), wherein an adhesive layer (7) is provided under the mirror reflection layer (6) of the retroreflection sheet to paste the sheet to a substrate (8) through the adhesive layer (7). The retroreflection sheet is characterized in that, when the retroreflection sheet is to be stripped from the substrate (8), delamination takes place between the focal point formation layer (4) and the glass balls (3) and / or the holding layer (2), or delamination takes place between focal point formation layers or between the focal point formation layer (4) and the mirror reflection layer (6), and / or the focal point formation layer (4) is broken and retroreflection performance is damaged or lost.

Description

technical field [0001] The present invention relates to retroreflective sheeting having a novel structure exhibiting a tamper-resistant effect. [0002] Specifically, for example, as shown in Figure 4, the present invention relates to a retroreflective sheeting, which is characterized in that: the retroreflective sheeting contains at least a plurality of micro glass spheres (3), and contains light-transmitting A retaining layer (2) of permanent resin, a specular reflection layer (6) reflecting incident light, and at least one focus forming layer containing light-transmitting resin arranged between the glass ball (3) and the specular reflection layer (6) layer (4), and the encapsulating lens type retroreflective sheeting of the specular reflection layer (6), an adhesive layer (7) is further provided on the lower part of the specular reflection layer (6) of the retroreflection sheet, through the adhesion Agent layer (7) is pasted on the retroreflective sheeting on substrate (8)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/128B32B5/16B32B7/02
CPCB32B7/06B32B5/16G02B5/128Y10T428/2848
Inventor 野村太三村育夫中泽广树
Owner NIPPON CARBIDE KOGYO KK
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