JP2006088593A - Metallic adhesive sheet for decoration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metallic adhesive sheet for decoration, having excellent weatherability and highly bright metallic texture. <P>SOLUTION: The metallic adhesive sheet for decoration is formed by laminating, in order, an acrylic resin layer (A) which contains a UV absorber and whose all light transmittance of the visible light is ≥85%, a metallic adhesive agent layer (B) obtained by incorporating aluminum metal powders and a pearl pigment into an acrylic adhesive agent, a colored soft vinyl chloride resin layer (C), and an acrylic adhesive agent layer (D). Preferably, the metallic adhesive agent layer (B) comprises 1-30 pts.wt. of the aluminum metal powders and 1-25 pts.wt. of the pearl pigment based on 100 pts.wt. of the acrylic adhesive agent. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a decorative metallic pressure-sensitive adhesive sheet having excellent weather resistance and a high-brightness metallic feeling.

  Conventionally, a pressure-sensitive adhesive sheet having a metallic feeling is generally produced by kneading a vinyl chloride resin with a colorant, aluminum metal powder, and the like and forming them into a thickness of several tens to several hundreds of μm. For example, Patent Document 1 discloses a decorative film in which a metal foil powder such as an aluminum metal powder is dispersedly contained in a mixed resin component of a vinyl chloride resin and an ethylene-vinyl acetate copolymer resin.

  The decorative film of Patent Document 1 is used as an adhesive sheet by being laminated with an adhesive layer, for example. As shown in FIG. 2, this configuration is such that a pressure-sensitive adhesive layer 1 is laminated with a metallic colored vinyl chloride resin layer 2 containing aluminum metal powder or the like in a mixed resin containing a vinyl chloride resin. Yes. However, although the decorative film of Patent Document 1 is said to have improved weather resistance, the aluminum metal powder exhibiting a metallic feeling has a catalytic action for decomposing the vinyl chloride resin, so that it is still weather resistant. Was not enough.

  On the other hand, in the pearl-like pressure-sensitive adhesive sheet, there is a pearl-like vinyl chloride pressure-sensitive adhesive sheet in which an acrylic pressure-sensitive adhesive layer containing a pearl pigment and a transparent vinyl chloride-based resin film layer are laminated to improve outdoor weather resistance. It is disclosed in Patent Document 2. In this configuration, as shown in FIG. 3, a transparent vinyl chloride resin layer 4 is laminated on an acrylic pressure-sensitive adhesive layer 3 containing a pearl pigment. However, in order to add a metallic tone and various color tones, when an aluminum metal powder, a coloring agent, or the like is included in an acrylic pressure-sensitive adhesive, a high-brightness metallic feeling cannot be obtained.

JP 57-59714 A Japanese Examined Patent Publication No. 6-99670

In the above background, in order to obtain a decorative metallic pressure-sensitive adhesive sheet having a brightness feeling, it is considered desirable that the aluminum metal powder is in a layer portion on the front side of the pressure-sensitive adhesive sheet rather than the colored layer. For this reason, it is conceivable to form a laminate having a multilayer structure. For example, as shown in FIG. 4, a colored vinyl chloride resin produced by kneading a vinyl chloride resin and a colorant in the first pressure-sensitive adhesive layer 5. The layer 6 was laminated, and on the colored vinyl chloride resin layer 6 side, a metallic vinyl chloride resin layer 8 produced by kneading vinyl chloride resin and aluminum metal powder in the second pressure-sensitive adhesive layer 7 was laminated. A pressure-sensitive adhesive sheet in which products are further laminated is conceivable.
However, although this pressure-sensitive adhesive sheet has a high-brightness metallic feeling, the aluminum metal powder in the vinyl chloride resin has a catalytic action for decomposing the vinyl chloride resin, so that the weather resistance is not sufficient. .

  An object of this invention is to provide the metallic adhesive sheet for decorations which is excellent in a weather resistance and has a high-intensity metallic feeling in view of the said present condition.

  In order to achieve the above object, the invention described in claim 1 includes an acrylic resin layer (A) containing an ultraviolet absorber and having a total light transmittance of 85% or more with respect to visible light, an acrylic adhesive, aluminum metal powder and pearl. Provided is a decorative metallic pressure-sensitive adhesive sheet in which a metallic pressure-sensitive adhesive layer (B) containing a pigment, a colored soft vinyl chloride resin layer (C), and an acrylic pressure-sensitive adhesive layer (D) are laminated in this order.

  In the invention according to claim 2, the metallic pressure-sensitive adhesive layer (B) contains 1 to 30 parts by weight of aluminum metal powder and 1 to 25 parts by weight of pearl pigment with respect to 100 parts by weight of the acrylic pressure-sensitive adhesive. A decorative metallic pressure-sensitive adhesive sheet according to claim 1 is provided.

Details of the present invention will be described below.
The decorative metallic pressure-sensitive adhesive sheet of the present invention contains an acrylic resin layer (A) containing an ultraviolet absorber and having a total light transmittance of 85% or more for visible light, and the acrylic pressure-sensitive adhesive contains aluminum metal powder and a pearl pigment. The metallic pressure-sensitive adhesive layer (B), the colored soft vinyl chloride resin layer (C), and the acrylic pressure-sensitive adhesive layer (D) are laminated in this order.

  The configuration of the decorative metallic pressure-sensitive adhesive sheet of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view for explaining the configuration of the decorative metallic pressure-sensitive adhesive sheet of the present invention. As shown in FIG. 1, the decorative metallic pressure-sensitive adhesive sheet is formed by laminating an acrylic resin layer A, a metallic pressure-sensitive adhesive layer B, a colored soft vinyl chloride resin layer C, and an acrylic pressure-sensitive adhesive layer D in this order. It has become.

  The acrylic resin used in the acrylic resin layer (A) in the present invention is not particularly limited. For example, (meth) acrylic acid esters such as methyl (meth) acrylate and butyl (meth) acrylate and derivatives thereof are mainly used. The thing made into a component is mentioned. Especially, what has these components and the component which provides softness | flexibility, such as isobutylene and butadiene, as a structural component is preferable. Here, methyl (meth) acrylate means methyl methacrylate or methyl acrylate.

  The acrylic resin layer (A) needs to contain an ultraviolet absorber. When the acrylic resin layer (A) corresponding to the surface layer portion of the decorative metallic pressure-sensitive adhesive sheet of the present invention contains an ultraviolet absorber, the weather resistance is excellent.

  The acrylic resin layer (A) preferably has an ultraviolet absorptivity of 90% or more because the weather resistance over time is poor when the ultraviolet absorptivity is low. In order to make the ultraviolet absorption rate 90% or more, the acrylic resin layer (A) can be obtained by containing an ultraviolet absorber.

  The ultraviolet absorber is not particularly limited, and examples thereof include salicylate series, o-hydroxybenzophenone series, o-hydroxyphenylbenzotriazole series, and the like. Of these, those having a high molecular weight are preferred because of their excellent stability over time.

  As for content of the said ultraviolet absorber, 0.5-6 weight part is preferable with respect to 100 weight part of acrylic resins. When the content is less than 0.5 parts by weight, the effect of improving the weather resistance is reduced, and when it exceeds 6 parts by weight, the surface of the acrylic resin layer (A) may bleed out or the transparency may be inferior. There is.

  In the present invention, the acrylic resin layer (A) needs to have a total light transmittance of 85% or more for visible light. When the total light transmittance is less than 85%, the transparency may be inferior, the brightness may be lowered, and the color of the colored soft vinyl chloride resin layer (C) as the lower layer may be dull.

  The said total light transmittance means the total light transmittance (%) of the acrylic resin layer (A) measured, for example using the turbidimeter.

  The acrylic resin layer (A) is made into an acrylic resin sheet by molding an acrylic resin containing an ultraviolet absorber into a sheet shape, and is suitable as an acrylic resin sheet in a method for producing a decorative metallic pressure-sensitive adhesive sheet described later. Used for.

  As for the thickness of the said acrylic resin sheet, ie, the thickness of an acrylic resin layer (A), 15-80 micrometers is preferable. When the thickness is less than 15 μm, the workability of producing a pressure-sensitive adhesive sheet by laminating may be reduced, and it may be difficult to increase the ultraviolet absorption rate to 90% or more. As a result, workability may be reduced.

The metallic pressure-sensitive adhesive layer (B) in the present invention comprises an acrylic pressure-sensitive adhesive containing aluminum metal powder and a pearl pigment.
Since the metallic pressure-sensitive adhesive sheet for decoration of the present invention contains aluminum metal powder in the metallic pressure-sensitive adhesive layer (B), the aluminum metal powder is in the layer portion on the front side of the colored layer, so that a metallic texture with high luminance is obtained. It is expressed and the pearl pigment is contained, so that the color tone can be deepened and the brightness can be increased. Therefore, since the aluminum metal powder and the pearl pigment are contained, a decorative metallic pressure-sensitive adhesive sheet having a deep color tone and a high-brightness metallic feeling can be obtained.

  The acrylic pressure-sensitive adhesive is not particularly limited, and examples thereof include polymers of alkyl (meth) acrylate monomers.

  Examples of the aluminum metal powder include not only aluminum metal powder that is powder of aluminum metal, but also, for example, foil-shaped aluminum metal foil powder, paste-like aluminum metal powder, and the like.

  The pearl pigment is not particularly limited, and examples thereof include a mica type pearl pigment.

  The metallic pressure-sensitive adhesive layer (B) preferably contains 1 to 30 parts by weight of aluminum metal powder with respect to 100 parts by weight of the acrylic pressure-sensitive adhesive. When the aluminum metal powder is less than 1 part by weight, it becomes difficult to express a metallic feeling, and when it exceeds 30 parts by weight, the adhesive strength may be lowered.

  The metallic pressure-sensitive adhesive layer (B) preferably contains 1 to 25 parts by weight of a pearl pigment with respect to 100 parts by weight of the acrylic pressure-sensitive adhesive. When the amount of the pearl pigment is less than 1 part by weight, the effect of deepening the color tone is reduced, and when it exceeds 25 parts by weight, the adhesive strength may be lowered.

  Therefore, the decorative metallic pressure-sensitive adhesive sheet of the present invention has a metallic pressure-sensitive adhesive layer (B) containing 1 to 30 parts by weight of aluminum metal powder and 1 to 25 parts by weight of pearl pigment with respect to 100 parts by weight of the acrylic pressure-sensitive adhesive. It is preferable that it is contained.

An ultraviolet absorber may be added to the metallic pressure-sensitive adhesive layer (B) as necessary in order to improve the weather resistance of the entire pressure-sensitive adhesive sheet. What was mentioned above can be used as a ultraviolet absorber.
As for the addition amount of the said ultraviolet absorber, 1-6 weight part is preferable with respect to 100 weight part of acrylic adhesives. When the addition amount is less than 1 part by weight, the effect of improving the weather resistance is reduced, and when it exceeds 6 parts by weight, the adhesiveness may be adversely affected.

  The thickness of the metallic pressure-sensitive adhesive layer (B) is preferably 20 to 50 μm in order to improve the workability when laminating to produce a pressure-sensitive adhesive sheet.

The material for obtaining the colored soft vinyl chloride resin layer (C) in the present invention is only required to obtain a colored soft vinyl chloride resin, and a vinyl chloride resin, a plasticizer, a pigment, and other if necessary These additives are used.
Further, the colored soft vinyl chloride resin layer (C) is blended with these materials and formed into a sheet shape to form a colored sheet, which is suitable as a colored sheet in the method for producing a decorative metallic pressure-sensitive adhesive sheet described later. used.

  Although it does not specifically limit as said vinyl chloride-type resin, For example, the thing of the particle diameter of 0.3-5 micrometers polymerized by emulsion or micro suspension, and a polymerization degree of 1000-5000 is preferable.

  The plasticizer is not particularly limited. For example, phosphate plasticizers such as tributyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate; diethyl phthalate, dibutyl phthalate, di-phthalate Phthalate ester plasticizers such as 2-ethylhexyl and diisononyl phthalate; Adipate ester plasticizers such as dibutyl adipate, di-n-hexyl adipate, di-2-ethylhexyl adipate and diisononyl adipate; Polyester A plasticizer etc. are mentioned.

  The content of the plasticizer is preferably 20 to 45 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. When the content is less than 20 parts by weight, the resulting colored sheet may be hard and brittle, and when it exceeds 45 parts by weight, the obtained colored sheet is too soft and loses its elasticity. The plasticizer may bleed out and adversely affect the pressure-sensitive adhesive layer.

  Examples of the pigment include, but are not limited to, azo pigments such as Lake Red C and Hansa Yellow; phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green; slene pigments such as indanthrene blue and perylene orange; Dye lakes such as eosin lake; quinacridone red, quinacridone magenta, dioxane violet, cadmium yellow, chrome vermillion, carbon black, titanium white and the like.

  The other additives are not particularly limited as long as they do not hinder the achievement of the object of the present invention, and examples thereof include an ultraviolet absorber, a heat stabilizer, and a bulking agent.

As the ultraviolet absorber, those described above can be used.
The addition amount of the ultraviolet absorber is preferably 0.5 to 5 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. When the addition amount is less than 0.5 parts by weight, the effect of improving the weather resistance is reduced, and when it exceeds 5 parts by weight, the colored sheet surface may bleed out.

The heat stabilizer is not particularly limited. For example, epoxidized vegetable oil such as epoxidized soybean oil and epoxidized linseed oil; epoxidized alicyclic compound such as epoxidized fatty acid ester and epoxidized tetrahydrophthalate; Organic stabilizers such as glycidyl ether, epoxidized polybutadiene, tributyl phosphite, triisooctyl phosphite; metal stabilizers such as Ba / Zn stabilizer, Ba / Pb stabilizer, Ca / Zn stabilizer, etc. Is mentioned. Among these, epoxidized soybean oil has not only an effect as a heat stabilizer but also an effect as a plasticizer, and is suitably used for calendering described later.
The addition amount of the heat stabilizer is preferably 5 to 10 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. If the addition amount is less than 5 parts by weight, the vinyl chloride resin may be decomposed and colored, and if it exceeds 10 parts by weight, the heat stabilizer itself may be colored or bleed out on the colored sheet surface. is there.

  The extender is not particularly limited, and examples thereof include calcium carbonate, talc (main component: hydrous magnesium silicate), kaolin (main component: aluminum silicate), silica (main component: amorphous silicon dioxide), and the like.

  Although the manufacturing method of the said colored sheet is not specifically limited, For example, the method etc. which shape | mold the resin composition which mix | blended the above-mentioned material into a sheet form by calendar shaping | molding, casting shaping | molding, etc. are mentioned.

  In the casting molding, it is preferable to disperse the resin composition in a solvent, cast the resulting vinyl chloride resin organosol on process paper, and dry and cure.

The solvent is not particularly limited, but is a dispersion solvent that slightly swells the vinyl chloride resin at room temperature to promote dispersion, and a dilution that is insoluble in the vinyl chloride resin and reduces the sol viscosity to suppress the swelling property of the dispersion solvent. It is common to use a mixture with a solvent.
Examples of the dispersion solvent include ketone solvents such as acetone, methyl isobutyl ketone, and diisobutyl ketone; ester solvents such as butyl acetate; glycol ethers and the like.
Examples of the diluent solvent include paraffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons, terpenes, and the like.
In addition, you may use the petroleum fraction which is a mixed solvent of a dispersion | distribution solvent and a dilution solvent. As a commercial item of the said petroleum fraction, Exxon Chemical Co., Ltd. make, brand name "Solvesso", "Exsol", "Isopar" etc. are mentioned, for example.

  The thickness of the colored sheet, that is, the thickness of the colored soft vinyl chloride resin layer (C) is appropriately adjusted depending on the casting amount, sol concentration, etc., but is preferably 40 to 120 μm. If the thickness is less than 40 μm, the tensile strength of the resulting colored sheet may be weak and workability may be reduced. If the thickness is more than 120 μm, the resulting colored sheet will be too hard and the workability will also be reduced. There is.

The acrylic pressure-sensitive adhesive layer (D) in the present invention is made of an acrylic pressure-sensitive adhesive.
As said acrylic adhesive, the acrylic adhesive mentioned by the above-mentioned metallic adhesive layer (B) is used.

  The thickness of the acrylic pressure-sensitive adhesive layer (D) is preferably 20 to 50 μm in order to improve the workability when laminating to produce a pressure-sensitive adhesive sheet.

  The method for producing a decorative metallic pressure-sensitive adhesive sheet of the present invention includes an acrylic resin layer (A), a metallic pressure-sensitive adhesive layer (B), a colored soft vinyl chloride resin layer (C), and an acrylic pressure-sensitive adhesive layer (D). Are laminated in this order. However, for example, a first pressure-sensitive adhesive sheet is produced by laminating an acrylic pressure-sensitive adhesive layer (D) and a colored soft vinyl chloride resin layer (C). The pressure-sensitive adhesive layer (B) and the acrylic resin layer (A) are laminated to produce a second pressure-sensitive adhesive sheet, and the metallic pressure-sensitive adhesive layer (B) of the second pressure-sensitive adhesive sheet is further changed to the first pressure-sensitive adhesive sheet. And a method of laminating the colored soft vinyl chloride resin layer (C).

  The method for producing the first pressure-sensitive adhesive sheet is not particularly limited. For example, an acrylic pressure-sensitive adhesive solution is coated on a release paper and dried to form an acrylic pressure-sensitive adhesive layer (D), and then colored. Examples thereof include a method of laminating a colored sheet to be the soft vinyl chloride resin layer (C) under heating to obtain an adhesive sheet with release paper. The release paper is peeled off when the decorative metallic pressure-sensitive adhesive sheet of the present invention is used.

  The method for producing the second pressure-sensitive adhesive sheet is not particularly limited. For example, the metallic pressure-sensitive adhesive layer (B) is coated with a metallic pressure-sensitive adhesive solution that becomes the metallic pressure-sensitive adhesive layer (B) and dried. Then, a method of laminating an acrylic resin sheet to be the acrylic resin layer (A) under heating to obtain a pressure-sensitive adhesive sheet with release paper, and the like. The release paper is peeled off when the second pressure-sensitive adhesive sheet is laminated on the first pressure-sensitive adhesive sheet.

(Function)
The metallic pressure-sensitive adhesive sheet for decoration of the present invention is more on the front side of the pressure-sensitive adhesive sheet than the soft vinyl chloride resin layer (C) in which the metal metal pressure-sensitive adhesive layer (B) contains aluminum metal powder and the aluminum metal powder is colored. Therefore, a high-brightness metallic feeling is expressed, and the inclusion of the pearl pigment makes the color tone deeper and more bright. Furthermore, since the upper layer of the metallic pressure-sensitive adhesive layer (B) containing the aluminum metal powder and the pearl pigment is an acrylic resin layer (A) with good transparency, it has a deep color tone and a high brightness metallic feeling. A metallic pressure-sensitive adhesive sheet for decoration can be obtained.

  Further, the decorative metallic pressure-sensitive adhesive sheet of the present invention does not cause the catalytic action of decomposing the vinyl chloride resin by the aluminum metal powder because the aluminum metal powder is not in direct contact with the vinyl chloride resin, and the vinyl chloride resin is hardly deteriorated. Furthermore, since the acrylic resin layer (A) corresponding to the surface layer portion contains an ultraviolet absorber, deterioration due to ultraviolet rays can be prevented, and thus weather resistance is excellent.

  Since this invention consists of the above-mentioned structure, it became possible to obtain the metallic adhesive sheet for decorations which is excellent in weather resistance and has a high-intensity metallic feeling.

  Hereinafter, the present invention will be described in more detail with reference to examples. In addition, this invention is not limited to a following example.

Example 1
(1. Preparation of colored sheet)
100 parts by weight of a vinyl chloride resin (“PSH-10” manufactured by Kaneka Chemical Co., Ltd.), 30 parts by weight of a polyester plasticizer (“P-300” manufactured by Asahi Denka Co., Ltd.), a yellow pigment (“VT-” manufactured by Dainichi Seika Co., Ltd.) 6420 ") 20 parts by weight, 5 parts by weight of a heat stabilizer (" MARK AR551 "manufactured by Asahi Denka Co., Ltd.), and 1 part by weight of an ultraviolet absorber (" Sumithorpe 140 "manufactured by Sumitomo Chemical Co., Ltd.) The mixture was dispersed in 60 parts by weight of a mixed solvent (“Solvesso 100” manufactured by Exxon Chemical Co., Ltd.), and the obtained vinyl chloride resin organosol was molded by a casting method to obtain a colored sheet having a thickness of 50 μm.

(2. Preparation of acrylic adhesive solution)
A composition comprising 100 parts by weight of an acrylic pressure-sensitive adhesive (“SK1335” manufactured by Soken Chemical Co., Ltd., 35% solids) and 5 parts by weight of a curing agent (“M-5A” manufactured by Soken Chemical Co., Ltd.) was stirred with a dissolver. A transparent acrylic pressure-sensitive adhesive solution for the acrylic pressure-sensitive adhesive layer (D) was obtained.

(3. Preparation of acrylic resin sheet)
An acrylic resin was obtained by copolymerization using 59 parts by weight of butyl methacrylate, 27 parts by weight of methyl methacrylate, 10 parts by weight of hydroxyethyl methacrylate, and 4 parts by weight of methacrylic acid.
100 parts by weight of the obtained acrylic resin and 1 part by weight of an ultraviolet absorber (“SUMISOPE 140” manufactured by Sumitomo Chemical Co., Ltd.) are added to 60 parts by weight of a mixed solvent composed of petroleum fraction (“Solvesso 100” manufactured by Exxon Chemical). The mixture was mixed and cast to obtain an acrylic resin sheet having a thickness of 40 μm.
The total light transmittance with respect to visible light measured using the turbidimeter (Nippon Denshoku Industries Co., Ltd. "NDH-300A") of the obtained acrylic resin sheet was 85-95%.

(4. Preparation of metallic adhesive solution)
In addition to a composition comprising 100 parts by weight of an acrylic pressure-sensitive adhesive (“SK1335” manufactured by Soken Chemical Co., Ltd., solid content 35%) and 5 parts by weight of a curing agent (“M-5A” manufactured by Soken Chemical Co., Ltd.), 1 parts by weight of paste-like aluminum metal powder (“5501N” manufactured by Showa Aluminum Powder Co., Ltd.) and a pearl pigment (“mealin card silver” manufactured by Engelhard Co., Ltd.) are added, stirred with a dissolver, and a metallic adhesive A metallic pressure-sensitive adhesive solution for the layer (B) was obtained.

(5. Production of first adhesive sheet)
The resulting acrylic pressure-sensitive adhesive solution was coated on a release paper having a polyethylene film laminated on both sides of fine paper and dried to obtain an acrylic pressure-sensitive adhesive layer having a thickness of 30 μm. The colored sheet was laminated with heating at 40 ° C. to obtain a first pressure-sensitive adhesive sheet with release paper.

(6. Production of second adhesive sheet)
The obtained metallic pressure-sensitive adhesive solution was coated on a release paper similar to the above and dried to obtain a metallic pressure-sensitive adhesive layer having a thickness of 30 μm. Lamination was performed under heating at 0 ° C. to obtain a second pressure-sensitive adhesive sheet with release paper.

(7. Preparation of metallic adhesive sheet for decoration)
The release paper of the obtained 2nd adhesive sheet was peeled off, the metallic adhesive layer was laminated | stacked on the coloring sheet of the 1st adhesive sheet, and the decorative metallic adhesive sheet with a release paper was obtained.
This configuration is as shown in FIG. 1, and an acrylic resin layer A, a metallic pressure-sensitive adhesive layer B, a colored soft vinyl chloride resin layer C, and an acrylic pressure-sensitive adhesive layer D are laminated in this order. ing.

(Example 2, Example 3, Comparative Example 1, Comparative Example 2)
In the production of the metallic pressure-sensitive adhesive solution, a decorative metallic pressure-sensitive adhesive sheet was obtained in the same manner as in Example 1 except that the paste-like aluminum metal powder and the pearl pigment having the parts by weight shown in Table 1 were used.

(Comparative Example 3)
(8. Preparation of metallic coloring sheet)
100 parts by weight of a vinyl chloride resin (“PSH-10” manufactured by Kaneka Chemical Co., Ltd.), 30 parts by weight of a polyester plasticizer (“P-300” manufactured by Asahi Denka Co., Ltd.), a yellow pigment (“VT-” manufactured by Dainichi Seika Co., Ltd.) 6420 ") 20 parts by weight, 5 parts by weight of a heat stabilizer (" MARK AR551 "manufactured by Asahi Denka Co., Ltd.), and 1 part by weight of an ultraviolet absorber (" Sumithorpe 140 "manufactured by Sumitomo Chemical Co., Ltd.) 60 parts by weight of a mixed solvent ("Sorvesso 100" manufactured by Exxon Chemical Co., Ltd.) consisting of petroleum fractions, with the same number of parts by weight as shown in Table 1 and the same paste-like aluminum metal powder and pearl pigment as used in the examples. The resulting vinyl chloride resin organosol was molded by a casting method to obtain a metallic colored sheet having a thickness of 50 μm.

(9. Preparation of metallic adhesive sheet for decoration)
As in Example 1, 2. An acrylic pressure-sensitive adhesive solution was prepared.
The resulting acrylic pressure-sensitive adhesive solution was coated on a release paper having a polyethylene film laminated on both sides of fine paper and dried to obtain an acrylic pressure-sensitive adhesive layer having a thickness of 30 μm. The metallic colored sheet was laminated under heating at 40 ° C. to obtain a decorative metallic pressure-sensitive adhesive sheet with release paper.
This configuration is similar to that shown in FIG. 2 in which the adhesive layer 1 is laminated with a metallic colored vinyl chloride resin layer 2 containing aluminum metal powder or the like in a mixed resin containing a vinyl chloride resin. A pearl pigment is further added to the metallic colored vinyl chloride resin layer 2.

(Evaluation)
About the obtained metallic adhesive sheet for decoration of Examples 1-3 and Comparative Examples 1-3, brightness feeling evaluation and weather resistance evaluation were performed by the method shown below. These results are shown in Table 1.

(Luminance evaluation)
Luminance was visually observed and evaluated according to the following criteria, using Comparative Example 3 as a standard.
○: Increased brightness △: No change ×: Reduced brightness

(Weather resistance evaluation)
Exposed for 200 hours under the following conditions with an ultraviolet irradiation weathering tester ("S-UV" manufactured by Dainippon Plastics), visually observed for appearance (fading, deterioration) after exposure, and evaluated according to the following criteria: .
1 cycle: Light 70 minutes Irradiation intensity 60mW / cm ² Temperature 53 ° C Humidity 70%
: Dew 20 minutes Temperature 30 ° C Humidity 100%
: Rest 30 minutes Temperature 70 ℃ Humidity 90%
Visual judgment ○: No change △: Partial fading ×: Significant fading

  According to the present invention, it is possible to provide a decorative metallic pressure-sensitive adhesive sheet having excellent weather resistance and a high-brightness metallic feeling.

It is a schematic diagram for demonstrating the structure of the metallic adhesive sheet for decoration of this invention. It is an example of the adhesive sheet which has the conventional metallic feeling, and is a schematic diagram for demonstrating the structure. It is an example of the adhesive sheet which has the conventional pearl tone, and is a schematic diagram for demonstrating the structure. It is an example of the decorative metallic pressure-sensitive adhesive sheet for reference, and is a schematic diagram for explaining the configuration.

Explanation of symbols

A Acrylic resin layer B Metallic adhesive layer C Colored soft vinyl chloride resin layer D Acrylic adhesive layer 1 Adhesive layer 2 Metallic colored vinyl chloride resin layer 3 Acrylic adhesive layer containing pearl pigment 4 Transparent chloride Vinyl resin layer 5 First adhesive layer 6 Colored vinyl chloride resin layer 7 Second adhesive layer 8 Metallic vinyl chloride resin layer

Claims (2)

  Acrylic resin layer (A) containing an ultraviolet absorber and having a total light transmittance of 85% or more with respect to visible light, a metallic pressure-sensitive adhesive layer (B) in which an aluminum metal powder and a pearl pigment are contained in an acrylic pressure-sensitive adhesive, and coloring A decorative metallic pressure-sensitive adhesive sheet comprising a laminated soft vinyl chloride resin layer (C) and an acrylic pressure-sensitive adhesive layer (D) in this order.   The metallic pressure-sensitive adhesive layer (B) comprises 1 to 30 parts by weight of aluminum metal powder and 1 to 25 parts by weight of pearl pigment with respect to 100 parts by weight of the acrylic pressure-sensitive adhesive. Metallic adhesive sheet for decoration.

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