JPH073219A - Decorative adhesive sheet - Google Patents

Abstract

(57) [Summary] [Purpose] Without losing the metallic feel during use,
In addition, a decorative pressure-sensitive adhesive sheet excellent in deepness is provided. [Structure] A first resin layer containing an aluminum foil piece having an average foil size of 5 to 20 μm and a second resin layer containing an aluminum foil piece having an average foil size of 30 to 100 μm are laminated, and the second resin layer is laminated. An adhesive layer is laminated on the resin layer surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metallic decorative adhesive sheet.

[0002]

2. Description of the Related Art Conventionally, a decorative pressure-sensitive adhesive sheet is known in which a pressure-sensitive adhesive layer is laminated on one surface of a substrate made of an opaque, transparent or translucent resin sheet mainly made of polyvinyl chloride containing a pigment. ing. This decorative adhesive sheet
It is used by applying an adhesive layer to the material to be decorated and exerting a decorative effect by the color and pattern of the surface side of the above resin sheet. In recent years, instead of painting, it is used in the field of displays such as advertisements and signboards. It is used in fleet marking fields such as vehicle decoration.

As one type of the decorative adhesive sheet, there is a metallic decorative adhesive sheet. The conventional one of this sheet has a pressure-sensitive adhesive layer laminated on one surface of a resin layer in which aluminum foil pieces of various sizes are uniformly dispersed (for example, JP-A-57-59714). Issue). The term foil size of the aluminum foil piece used in the present specification refers to the maximum length in the plane direction when the scale-like aluminum foil piece is observed in the thickness direction and the plane direction separately.

[0004]

However, in the decorative pressure-sensitive adhesive sheet of this structure, since a large foil-sized piece of aluminum foil protrudes from the surface of the sheet and is exposed, the portion of the sheet is exposed to water during use of the sheet. However, there is a problem in that the metallic feel is impaired by being oxidized by the influence of oxygen and the like, and the appearance is obstructed by large particles, so that the transparency of the sheet is deteriorated and thus there is no deep feeling.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a decorative pressure-sensitive adhesive sheet which does not impair the metallic feel during use and is excellent in deepness.

[0006]

The decorative pressure-sensitive adhesive sheet of the present invention contains a first resin layer containing an aluminum foil piece having an average foil size of 5 to 20 μm and an aluminum foil piece having an average foil size of 30 to 100 μm. The laminated second resin layer is laminated, and the pressure-sensitive adhesive layer is laminated on the surface of the second resin layer.

The resin that can be used for the first and second resin layers is not particularly limited as long as it is transparent and can be formed into a sheet shape. For example, polyvinyl chloride resin, Examples thereof include polyurethane resins, polyolefin resins, polyester resins, fluorine resins, acrylic resins and mixtures thereof.
Of these, polyvinyl chloride resins are preferable in terms of flexibility, weather resistance and moldability.

The average foil size of the aluminum foil pieces contained in the first resin layer is 5 to 20 μm. When the average foil size becomes smaller, the metallic tone becomes less noticeable, and when it becomes larger, a part of the aluminum foil piece is more likely to be exposed than the surface of the decorative pressure-sensitive adhesive sheet, and the feeling of depth is likely to be lost. The content of the aluminum foil pieces in this resin layer is preferably 2 to 20 parts by weight with respect to 100 parts by weight of the resin. When the content of aluminum foil pieces decreases, the degree of metallic tone tends to decrease,
When the amount is large, the transparency is reduced and the deepness is likely to be lost.

The average foil size of the aluminum foil pieces contained in the second resin layer is 30 to 100 μm. When the foil size is small, the metallic tone becomes inconspicuous, and when it is large, the feeling of depth is lost. The content of the aluminum foil pieces in this resin layer is 5 to 3 with respect to 100 parts by weight of the resin.
0 parts by weight is preferred. When the content of the aluminum foil pieces is low, the degree of metallic tone tends to be low, and when the content is high, the deep feeling is likely to be lost.

In each of the above resin layers, if necessary, a pigment,
Dyes, plasticizers, stabilizers, UV absorbers and the like may be contained.

The thickness of each resin layer is not particularly limited as long as a metallic tone is exhibited, but preferably 20 to 60 μm for each layer, and 40 to 100 μm as the total thickness of the resin layers after lamination. It is preferable from the above point.

As a method for producing each resin layer, any conventionally known production method can be adopted. For example, when each resin layer is a vinyl chloride resin layer, it may be formed into a sheet by calendering. However, a cast film obtained by casting a sol obtained by mixing and dispersing the resin with aluminum foil pieces, a plasticizer, a stabilizer, and a solvent on a process paper has excellent physical properties such as flexibility and low heat shrinkability. It is preferable because it exists. Examples of the method for laminating the resin layers include a method of laminating each resin layer sheet prepared separately while heating, or a method of laminating one resin layer surface on the other resin layer surface by a casting method.

In the decorative pressure-sensitive adhesive sheet of the present invention, a pressure-sensitive adhesive layer is laminated on the second resin layer surface. Examples of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer include rubber-based, urethane-based, silicon-based, and acrylic-based pressure-sensitive adhesives, but acrylic-based pressure-sensitive adhesives are preferable from the viewpoint of adhesive strength and durability. The thickness of the pressure-sensitive adhesive layer is preferably 20 to 50 μm in terms of adhesive strength to an adherend and ease of use.

The method of laminating the pressure-sensitive adhesive layer is carried out by dissolving and dispersing the compounding composition material of the pressure-sensitive adhesive in a general-purpose or industrially used organic solvent such as toluene, xylene or ethyl acetate. A solution is prepared, and the adhesive solution is applied to the surface of the resin layer and dried to form an adhesive layer. The coating machine that can be used to form the pressure-sensitive adhesive layer is not particularly limited as long as it is used for ordinary pressure-sensitive adhesive solution coating, but preferably, the thickness can be accurately adjusted, Moreover, a knife coater, a comma coater, and a roll coater that can be applied with high productivity can be mentioned.

As a coating method, a pressure-sensitive adhesive solution is directly applied to the resin layer surface and dried, or a pressure-sensitive adhesive solution is once applied to release paper and dried to form a pressure-sensitive adhesive layer and then bonded to the resin layer surface. Such as the transfer method
It can be selected appropriately.

The decorative pressure-sensitive adhesive sheet thus produced is usually stored as a laminate in which a release paper is attached to the pressure-sensitive adhesive layer surface, and the release paper is peeled off from the pressure-sensitive adhesive layer surface before use.

[0017]

In the present invention, since the aluminum foil piece having a small foil size is used for the resin layer on the surface side of the decorative adhesive sheet, the aluminum foil piece hardly sticks out on the surface of the decorative adhesive sheet. During use, the aluminum foil piece is not oxidized by the influence of water, oxygen, etc., and the metallic feeling is not impaired. Further, since the aluminum foil piece having a small foil size has a small shielding property, it has a transparent feeling, and a deep feeling can be obtained by the mutual effect with the lower metallic resin layer.

[0018]

EXAMPLES Examples of the present invention will be described below. Example (1) First, in order to obtain a first resin layer, the following vinyl chloride-based organosol composition was prepared with a dissolver stirrer, and this was processed with a comma roll coater (DNTP-, manufactured by Dai Nippon Printing Co., Ltd.). NML) and after drying, 200
The resin sheet was cured at 0 ° C. to obtain a resin sheet having a thickness of 30 μm. "Organosol composition" Vinyl chloride resin (Zeon 121 manufactured by Nippon Zeon Co., Ltd.) 100 parts by weight Barium / zinc stabilizer (BZ-100J manufactured by Katsuta Kako Co., Ltd.) 2 parts by weight Benzotriazole ultraviolet absorber 2.5 parts by weight (Ciba Geigy, Tinuvin 326) Adipic acid-based polyester plasticizer 30 parts by weight (Adeka Argus, Adeka Sizer-PN446) Hydrocarbon solvent (Shell Chemical Co., Solvesso # 150) 50 parts by weight Aluminum foil piece (Asahi Kasei) Manufactured by M-601, average foil size 18 μm) 10 parts by weight

(2) Next, the following vinyl chloride-based organosol composition was prepared with a dissolver stirrer, and this was coated on the resin sheet obtained in (1) above with a comma roll coater, and after drying. Then, the resin was cured at 200 ° C. to obtain a laminated resin sheet having a total resin layer thickness of 60 μm. "Organosol composition" Instead of 10 parts by weight of the aluminum foil piece of the organosol composition used in (1) above, an aluminum foil piece (MG-21, manufactured by Asahi Kasei Co., average foil size 31 μm)
The same composition as the organosol composition of (1) above except that 20 parts by weight was used.

(3) Next, 100 parts by weight of an acrylic adhesive (acrylic adhesive (P-44, manufactured by Soken Chemical Industry Co., Ltd.) and 2 parts by weight of an isocyanate curing agent (Coronate L-55, manufactured by Nippon Polyurethane Co., Ltd.) Was applied to release paper (Kite Chemical Co., Ltd., SLK-110) with a comma roll coater so that the film thickness after drying would be 30 μm, and after drying, the laminate obtained in (2) above. After bonding with the resin sheet, the process paper was peeled off to obtain the decorative pressure-sensitive adhesive sheet of the present invention.

FIG. 1 is an enlarged sectional view showing the constitution of the decorative pressure-sensitive adhesive sheet of the example. Reference numeral 1 is a first resin layer, 2 is a second resin layer, 3 is an adhesive layer, and 4 is release paper.

The resulting decorative pressure-sensitive adhesive sheet had a deeper appearance than the conventional product (Tak Paint TP07M manufactured by Sekisui Chemical Co., Ltd.). The obtained decorative pressure-sensitive adhesive sheet was set on a sunshine weatherometer (manufactured by Suga Test Instruments Co., Ltd.), and weather resistance was evaluated according to JIS D 0205. At this time, conventional products (Sekisui Chemical Co., Ltd.,
Tack Paint TP07M) was also tested. As a result, the appearance of the present invention product and the conventional product did not change until the weatherometer irradiation time of 2000 hours.
When irradiated for a long time, the product of the present invention had no change in appearance, but the conventional product had an aluminum foil piece oxidized and the metallic feeling was impaired.

[0023]

The decorative pressure-sensitive adhesive sheet of the present invention has the structure as described above, and does not impair the metallic feel during use, and also has an excellent appearance in terms of deepness, such as advertisements and billboards. It can be suitably used as an outdoor marking material in the display field, the fleet marking field such as vehicle decoration, and the like.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing the structure of a decorative pressure-sensitive adhesive sheet of an example.

[Explanation of symbols]

 1 First Resin Layer 2 Second Resin Layer 3 Adhesive Layer 4 Release Paper

Claims (1)

[Claims] 1. A first resin layer containing an aluminum foil piece having an average foil size of 5 to 20 μm and an average foil size of 30 to 100 μm.
A second adhesive layer containing the aluminum foil piece is laminated, and an adhesive layer is laminated on the surface of the second resin layer.