JPH11217524A - Specially brilliant foil powder and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an extremely thin, flat, microfine foil powder that has iris-like specially brilliant and esthetical appearance and to provide its production method. SOLUTION: This is a foil powder that is prepared by laminating resin layers of a 0.2-5 μm thickness on both faces of a metallic thin layer (c) with a thickness of 10-300 nm in which at least one layer of the resin layers has a holographically processed surface. The specially brilliant foil powder is produced by forming at least an undercoat resin layer (b), a metallic thin layer (c), and a top coat resin layer (d) on a specially brilliant foil powder and a releasable base film (a), then releasing the base film to prepare a laminated body other than the base film. The resultant laminate body is crushed to give the objective foil powder in which at least one surface of (b) and (d) is subjected to the holographic processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a foil or powder in which the luminosity of a metal thin film formed by a hologram exhibits a special luminosity.
And its manufacturing method.

[0002]

2. Description of the Related Art Hitherto, there has been known a laminate in which a metal thin film is provided on a hologram-processed film substrate, or a strip, a glitter, or a transfer foil from the laminate.

[0003]

SUMMARY OF THE INVENTION
Strips and glitters having special glittering properties due to the hologram and the metal thin film were formed into thin pieces integrally with the film base, and were thick with the thickness of the film base. For this reason, when these small pieces and glitter were used for coating, there were many problems in the smoothness of the coated surface. In addition, when the transfer foil is used, it can be used for a flat surface or the like, but a curved portion, particularly a curved surface having an acute angle, often has a crack at the time of transfer and impairs the special brilliancy of the bending angle.

[0004] The present invention solves the above-mentioned problems of the decorative material using the hologram and the metal thin film, and can be used for a paint that can be applied to any curved surface. Foil powder as a special bright decorative material, such as it can be used for paint materials that do not affect
And a method for producing the same.

[0005]

That is, according to the present invention, a metal thin film layer (c) having a thickness of 10 to 300 nm has a thickness of 0.1 mm on both sides.
A special brilliancy which is a foil powder comprising a laminate provided with a resin layer of 5 to 5 micrometer (hereinafter abbreviated as "micron"), wherein at least one of the resin layers has a hologram-processed surface. The special glittering powder, wherein the thickness of the metal thin film layer (c) is 20-150 nm; and the special glittering property, wherein the thickness of the resin layer is 0.3-3 μm. It is foil powder. Further, at least an undercoat resin layer (b), a metal thin film layer (c), and a top coat resin layer (d) are formed on the peelable base film (a).
Is formed, a post-peelable base film is peeled off, a laminate comprising at least bcd is obtained, and at the time of obtaining a foil powder by pulverizing the laminate, hologram processing is performed on at least one surface of the bd. This is a method of producing special glittering foil powder.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The peelable base film (a) of the present invention includes polyester films such as polytetrafluoroethylene, polyethylene, polypropylene, polyethylene terephthalate and polyethylene naphthalate; polyamide films such as 66 nylon and 6 nylon;
Polycarbonate film, triacetate film,
A polyimide film or the like may be used, but is not particularly limited. These peelable base films may be those in which a release layer of a silicone resin or the like is previously formed before formation of these layers when the peelability is insufficient in relation to the undercoat layer and the resin layer added as necessary. .

[0007] The thickness of these films is from 4 microns to 120 microns, and less than 4 microns
There are many problems in handling properties in the metal thin film forming process and the like.
If the thickness exceeds 0 μm, the flexibility becomes poor, and the handling property is increased in the peeling step of peeling the peelable base film. The thickness of these films is from 6 microns to 8
0 microns is particularly preferred.

[0008] As the paint used for the undercoat layer used in the present invention, for example, acrylic resin, vinyl chloride,
Natural resins such as vinyl acetate copolymer resin, epoxy resin, urethane resin, polyvinyl butyral resin, cellulose acetate resin, nitrocellulose resin, rosin-modified maleic resin, urea resin, melamine resin, novolac phenol resin, shellac resin and the like But not limited thereto, a solvent solution of one or a mixture of two or more of modified resins, polyvinyl alcohol, sodium carboxymethyl cellulose, casein, starch, and higher fatty acid soda salts. Examples of the solvent include, but are not limited to, trichloroethylene, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, methanol, ethanol, asopropanol, n-butanol, xylene, toluene, cellosolve and the like. Further, a plasticizer or a viscosity modifier may be added to the paint.

[0009] The thickness of the undercoat layer (as well as the topcoat layer) is 0.2-5 microns, preferably 0.1-0.
3-3.0 microns, more preferably 0.5-
1.5 microns. When the thickness is less than 0.2 μm, the effect on the protection of the metal foil film is small, and when it exceeds 5 μm, the protection effect does not increase so much and becomes economically disadvantageous. The thickness of the finally obtained foil powder becomes too large and does not meet the object of the present invention. The undercoat layer and the top coat layer are used by appropriately selecting the above-described resin, but when the surface of the foil powder is to be modified, while maintaining the glitter of the metal thin film, Selection or addition of a property improving agent to the resin, for example, a coloring agent, a hydrophilicity-imparting agent, a lubricant or the like can be easily carried out. Further, in addition to the undercoat layer and the topcoat layer, layers such as a coloring layer and a protective layer may be additionally provided.

As an example of the hologram processing surface of the foil powder of the present invention, hologram processing is performed on the undercoat layer (similarly for the top coat layer). Using a positive type photoresist, laser light is used to imprint the interference fringes on the original plate as fine irregularities as a fine unevenness, and the imprinting plate is adhered to the undercoat layer and hot pressed to undercoat the unevenness. A method of transferring the layer to the surface on which the metal vapor deposition thin film is formed is exemplified. The fine irregularities have a depth of about 0.1 to 0.2 microns and can be finely adjusted as appropriate. The position existing on the resin layer surface in the foil powder on the hologram processing surface can be expressed in terms of the mutual relation between the layers, as described above, between the undercoat layer and the metal thin film, or between the undercoat layer and the peelable base. Between the film, or between the metal thin film layer and the top coat layer, or on the side of the top coat layer opposite to the metal thin film layer side, a resin layer added as necessary other than the undercoat layer and the top coat layer However, this is the preferred case in terms of the foil powder production process and from the viewpoint of glitter.

A metal thin film layer is formed on the hologram-processed undercoat layer in order to enhance iris-like special brightness. As the metal for forming the metal thin film, gold, silver, aluminum, nickel, tin, chromium, zinc and the like are used, but not limited thereto, alloys of the above-mentioned metals mixed, and oxidation of these metals. Reflective from objects, etc.
The transmittance may be adjusted and appropriately selected and used. The thickness of these metal thin film layers is preferably in the range of 10-300 nm, and when it is less than 10 nm, its performance is poor in brilliancy. It is not economically advantageous in addition to being less affected by the properties and brilliancy. The thickness of the thin film layer is particularly preferably in the range of 20-150 nm.

The method of forming the metal thin film layer on the peelable film (directly, the undercoat layer) is not particularly limited in the method.
A dry thin film forming method such as ion plating is preferred.
After forming the metal thin film layer, a top coat layer is formed. The top coat layer is formed by appropriately selecting and using the above-mentioned paint for preparing the undercoat layer. Top coat layer,
If necessary, other resin layers may be separately formed in addition to the undercoat layer. However, the final foil powder must be formed and used in a thickness not exceeding 8 microns, preferably not exceeding 6 microns. It must not be. In the present invention, as described above as an example, a peelable base film,
A laminate A comprising an undercoat layer, a hologram processed surface on the undercoat layer, a metal thin film layer on the processed surface, and a top coat layer is obtained, and only the peelable base film is peeled off from the laminate A to obtain a foil powder. To obtain a laminate B composed of an undercoat layer, a hologram processed surface on the undercoat layer, a metal thin film layer on the processed surface, and a top coat layer, and pulverize the laminate B to obtain foil powder. .

The method of peeling is not particularly limited, but a preferred example is described below. While rewinding the roll A, which is a rolled-up body of the long laminate A, only the peelable base film is folded back by the guide bar provided orthogonal to the rewinding direction so as to sandwich the guide bar, and It is wound up while being stretched. Due to the stretching of the film, the laminate B cannot follow the stretching of the peelable base film, and is peeled from the peelable base film because its interface is peelable. The peeled laminate B is peeled and collected in a direction substantially opposite to the direction in which the peelable base film is wound up. The stacked body is pulverized to an appropriate size. In order to be adapted to the preferred peeling method as described above, the peelable base film has a thickness of 0.1-.
A film having an elongation of 50% is desirable, and examples thereof include a non-stretched or unstretched polypropylene film. During stretching, heating may be performed as appropriate.

The precursor of the foil powder obtained as the laminate B is crushed to obtain the foil powder of the present invention. The pulverizing method is not particularly limited, and examples thereof include a jet mill, a ball mill, a ring roll mill, a hammer mill, and a tube mill nad. The foil powder thus obtained is made into flat foil powder of each particle size by sieving or the like. The maximum average length of the flat foil powder on the flat surface is 5 micron, and the maximum average length on the flat surface is several centimeters. , Can be obtained arbitrarily. The foil powder of the present invention is extremely thin, and is used for printing inks, paints, etc., but the surface of the foil powder is arranged in parallel to the surface to be applied or printed, and the amount of coating or printing is extremely thin. Also, it forms a beautiful film surface with excellent smoothness and excellent wear resistance. The foil powder of the present invention generally has 10-50 times the concealing ability as compared with the case where a conventional powder (metal or the like) is used, and the usage fee is 1/10 to 1/50. That would be fine.

[0015]

EXAMPLES ** Example 1 An unstretched polypropylene film (a) having a thickness of 30 μm, 20 parts (by weight, hereinafter the same) of polyvinyl chloride / vinyl acetate copolymer resin, 25 parts of ethyl acetate, 25 parts of methyl ethyl ketone
And a coating of 30 parts of toluene were applied by a gravure method to form an undercoat layer (b) having a thickness of 1 micron. The surface of the undercoat layer (b) opposite to the film (a) was subjected to the following hologram processing. A positive photoresist using an O-naphthoquinonediazide-based compound as a photosensitive material is produced, and an interference fringe of light is engraved on a master as fine irregularities by a laser beam to form a mold, and an undercoat layer (b)
Was transferred by heat and pressure to the surface opposite to the film (a).
Aluminum was vapor-deposited and formed on the obtained uneven surface as a metal thin film layer (c) to a thickness of 80 nm using a vacuum vapor deposition machine. A resin layer having a thickness of 1 micron was similarly formed on the obtained aluminum metal thin film layer (c) as the top coat layer (d) using the same paint as the undercoat layer. . In this way, a long roll laminate (A) having an iris-like special brilliancy is obtained, and the long roll laminate (A) is disposed with the top coat layer (d) side down, orthogonal to the rewinding direction. The film (a) is rewound while passing through the lower side of the guide bar.
The laminate B made of another bcd was peeled off on the side opposite to the film (a), shaken off, and accumulated. The obtained laminate B was pulverized and sieved to obtain a beautiful flat glittering foil powder having an average longest piece length of 10 μm and a thickness of 2 μm.

** Example 2 20 parts of a polyurethane resin and 30 parts of ethyl acetate were added to an unstretched polypropylene film (a) having a thickness of 20 μm.
1 part of toluene, 30 parts of ethyl alcohol, and 20 parts of ethyl alcohol, a 1 micron thick undercoat layer (b) was formed by a gravure method. The hologram processing, the formation of the aluminum metal thin film layer (c), and the formation of the top coat layer (d) were carried out in the same manner as in Example 1.
A foil powder was obtained in the same manner as described above.

[0017]

The special glittering foil powder of the present invention has an iris-like special glittering appearance by a hologram and a metal thin film and is an extremely thin flat fine foil powder.
It can be used very widely for special glitter decoration as ink.

Claims (4)

[Claims] 1. A metal thin film layer (c) having a thickness of 10 to 300 nm.
A foil powder comprising a laminate having a resin layer having a thickness of 0.2-5 μm on both surfaces thereof, wherein at least one of the resin layers has a hologram-processed surface. Foil powder. 2. The thickness of the metal thin film layer (c) is 20-15.
The special glitter foil powder according to claim 1, which has a thickness of 0 nm. 3. The special glitter foil powder according to claim 1, wherein the thickness of the resin layer is 0.3-3 μm. 4. At least an undercoat resin layer (b), a metal thin film layer (c) and a top coat resin layer (d) are formed on a peelable base film (a), and the peelable base film is peeled off. A method for producing a special glittering foil powder, characterized in that a laminate comprising at least bcd is obtained, and a hologram processing is performed on at least one surface of the bd when pulverizing the laminate to obtain a foil powder.