JPH0686958A - Magnetic pattern sheet and formation of magnetic pattern - Google Patents

Abstract

PURPOSE:To form a pattern having a three-dimensional feeling by partially providing a magnetic powder-containing colored layer on the upper surface of a base sheet and forming the colored layer into a magnetic pattern by the action of magnetic force. CONSTITUTION:A magnetic powder-containing liquid material 7 is applied or printed on the part of the upper surface of a base sheet 2 corresponding to the position of the magnet 1 fixed to the under surface of the base sheet 2 to form a magnetic powder-containing liquid film 3' which is, in turn, heated or dried at room temp. to obtain a magnetic powder-containing colored layer 3. Thereafter, a magnetic pattern is formed on the under surface of the base sheet 2 positioned at the same part as the colored layer 3 by the action of magnetic force. By this method, a magnetic pattern sheet having an excellent three-dimensional feeling showing a character or figure in an embossed state is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic pattern sheet and a magnetic pattern forming method.

[0002]

2. Description of the Related Art Conventionally, formation of a pattern coating film characterized in that a magnetic powder contained in a liquid coating film is oriented by the action of a magnetic force to make a pattern appear differently from other portions which are not magnetized. The method (Japanese Patent Laid-Open No. 63-175670) is known.

The method of forming the coating film is shown in FIGS. 1 (a) and 1 (b).
As shown in FIG. 3, a magnetic powder-containing liquid coating material is applied to the surface of a base sheet 2 having a sheet-shaped magnet 1 fixed on the back surface, and a liquid coating film 3 ′ is formed (FIG. 1, a) to form a liquid coating material. A magnetic force is applied to the magnetic powder in the liquid coating film in a state in which the film 3 ′ can flow, and the magnetic force forms the character 4 (FIG. 1, b).
Is the way to do it.

[0004]

However, in the conventional method for forming a patterned coating film as described above, as shown in the sectional view 2, the magnetic powder is applied to the portion 5 where the magnetic force acts strongly from the periphery.
Moving in the direction of the arrow, there is a large amount of magnetic powder in the part 5,
There is a small amount in the periphery, and characters are formed due to the change (shading) of the amount of magnetic powder. For this reason, the formed characters do not have clear contours and are inferior in three-dimensional appearance. There was a point.

[0005]

As a result of various studies on a method for overcoming the above problems, the present inventor has partially formed a magnetic powder-containing colored layer in the conventional method to form a discontinuous layer. It was found that when a magnetic force is applied to this material, a pattern having a three-dimensional effect can be formed, and the present invention has been completed.

That is, according to the present invention, a magnetic powder-containing colored layer is partially provided on the upper surface of a base sheet, and the colored layer is partially formed on the upper surface of a magnetic pattern sheet or a base sheet for forming a magnetic pattern by the action of magnetic force. A method for forming a magnetic pattern containing a magnetic powder-containing colored layer and forming a magnetic pattern from the lower surface of the base sheet corresponding to the same portion as this colored layer by the action of magnetic force, and a magnetic powder-containing colored layer partially on the upper surface of the base sheet And a magnetic pattern forming method for forming a magnetic pattern by the action of magnetic force from the lower surface of the base sheet corresponding to a portion different from the colored layer.

The magnetic pattern sheet of the present invention has a base sheet 2 and a magnetic powder-containing colored layer 3 partially formed on the base sheet 2 as shown in FIGS. 3, (a) and (b). .

The material and shape of the base sheet 2 used in the magnetic pattern sheet of the present invention are not particularly limited, and include plastic, aluminum, stainless steel, paper,
It is preferable to use a non-magnetic material such as cloth. Specific examples of plastics include, for example, polyvinyl chloride, polyester, polyethylene, nylon, polyurethane, polyimide, acrylic, styrene, ABS, phenol, epoxy, cellulose and rubber.

The base sheet 2 may itself be colored or transparent. Also, the base sheet 2
The film thickness of can be selected without any particular limitation as long as it is a film thickness that acts on the magnetic powder when the magnet is brought close to or fixed to the lower surface of the base sheet 2. Specifically, about 1 to 50,000
A range of .mu.m, preferably about 1 to 10,000 .mu.m is desired.

The magnetic powder-containing coloring layer 3 provided on the upper surface of the base sheet 2 contains a vehicle component of a magnetic powder material and a solvent as main components, and further contains a coloring pigment, a dye, an aluminum powder, a pearl pigment, mica, etc., if necessary. It is formed by using a liquid composition prepared by blending. Further, additives, surface modifiers, extender pigments, etc. may be added to the liquid composition as appropriate.

The magnetic powder material is a powder whose orientation is changed by magnetic force when a magnet is applied to it, such as nickel,
Powders of stainless steel, cobalt, chromium, iron, or the like having a high iron content, and powders coated with or containing these metals are preferable. The shape may be flaky, thin plate-like, granular, or the like, and the maximum size is 1 to 200.
μm, preferably 10 to 30 μm.

As the vehicle component, usual paint resins can be used, and examples thereof include resins that dry or react and cure at room temperature, resins that cure or melt by heating, and resins that cure upon irradiation with active energy rays. Are alkyd resin, polyester resin, acrylic resin, urethane resin, vinyl resin, amino resin, epoxy resin,
Phenolic resins, silicone resins, fluororesins and modified resins thereof are preferred.

The solvent may be an organic solvent and / or water. Examples of the form of the liquid composition include organic solvent type, non-aqueous dispersion type, aqueous solution type and emulsion type.

The magnetic powder material is preferably 1 to 100 parts by weight, more preferably 10 to 50 parts by weight, per 100 parts by weight (solid content) of the vehicle component. The thickness of the colored layer formed by the coating material containing the magnetic powder material is 2 to 100 μm, preferably 20 to 30 μm, and it is not necessary to completely hide the base sheet with the colored layer.

Prior to the formation of the magnetic powder-containing colored layer 3, if necessary, a colored primer containing a coloring pigment and a vehicle component as main components and containing no magnetic material is formed on the base sheet. It is also possible.

The colored primer is formed in order to obtain the desired color tone of the pattern to be revealed. For example, if the base sheet itself is colored such as plastic and the color tone matches the purpose. , There is no need to form a colored primer.

The color tone of the colored primer can be arbitrarily selected according to the purpose, and can be easily adjusted by the composition and ratio of the coloring pigment (organic or inorganic type, metallic type, etc.). Further, the vehicle component is preferably one or more selected from those described in the magnetic powder-containing colored layer 3. The colored primer has a film thickness of 5 to 100 μm, preferably 15
-25 μm is suitable.

As the magnetic force applied to the magnetic powder-containing colored layer 3 in the magnetic pattern sheet of the present invention, magnetic force generated by, for example, a permanent magnet, an electromagnet, or a heat conductive magnet can be used. Among these, a sheet-shaped permanent magnet is preferable, and a magnet having both sides magnetized is desirable.

Further, in the magnetic pattern sheet of the present invention,
The magnetic powder-containing colored layer 3 can be partially provided on the upper surface of the base sheet 2 by drawing the following magnetic powder-containing liquid material by means such as (masking) painting and printing the desired characters and patterns. .

In the magnetic pattern sheet of the present invention, a transparent or translucent layer can be formed on the upper surface of the base sheet 2 and the magnetic powder-containing colored layer 3 as required. In addition, a pressure-sensitive or heat-sensitive adhesive layer and a release sheet layer can be sequentially provided on the lower surface of the base sheet, if necessary.

In the magnetic pattern forming method of the present invention, a magnetic powder-containing colored layer is partially provided on the upper surface of the base sheet, and the magnetic pattern is formed by the action of magnetic force from the lower surface of the base sheet located at the same portion as the colored layer. Can be formed.

In this method, as shown in FIGS. 4A and 4B, the magnetic powder-containing liquid material 7 is formed on the upper surface of the base sheet 2 corresponding to the position of the magnet 1 fixed to the lower surface of the base sheet 2. Painted or printed (screen printing 8) (Fig. 4
(A)) Forming a magnetic powder-containing liquid film 3 '(FIG. 4 (b)),
Then, the liquid film 3 ′ is heated or dried at room temperature to obtain the magnetic powder-containing colored layer 3, and then the magnet 1 is removed from the base sheet 2.

In the magnetic pattern forming method according to another aspect of the present invention, a magnetic powder-containing coloring layer is partially provided on the upper surface of the base sheet, and the magnetic force is applied from the lower surface direction of the base sheet located at a portion different from the coloring layer. A magnetic pattern can be formed by the action.

In this method, as shown in FIGS. 5A and 5B, magnetic powder-containing liquid is added to the upper surface of the base sheet 2 corresponding to positions other than the magnet 1 fixed to the lower surface of the base sheet 2. The object 7 is painted or printed (screen printing 8) (FIG. 5 (a)) to form a magnetic powder-containing liquid film 3 ′ (FIG. 5 (b)), and then the liquid film 3 ′ is heated or dried at room temperature to obtain magnetic properties. This can be performed by removing the magnet 1 from the base sheet 2 after obtaining the powder-containing colored layer 3.

In the magnetic pattern forming method of the present invention, since the magnetic powder-containing liquid material 7 needs to move due to the action of magnetic force at the time of coating or printing, the coated or printed liquid film 3 '. The viscosity of 0.5 to 6 poise, preferably 1 to 3 poise (both at 20 ° C.) is desirable.
Further, the means of coating and printing are conventionally known methods, for example, coating methods such as roller, brush, spray, and sink,
Printing methods such as screen and gravure can be used. Further, in the coating means, in order to partially coat the upper surface of the base sheet and obtain a desired character or pattern, the coating can be performed directly by the coating means or by coating through masking.

In the magnetic pattern forming method of the present invention, the magnetic pattern forming process obtained by the former method is performed, for example, by taking a cross section cut along the horizontal axis so as to pass through the center of the letter A in FIG. As schematically shown in FIG. 6A, when the magnetic force acts on the character, the magnetic powder material 6 moves from the inner side of the cross section (the vicinity of the outer circumference 9 and the center 11 of the inner circumference 13 of the character) to the outer side. A magnetic pattern is formed by moving and orienting in the direction of the arrow in (10 near the outer circumference of the character and 12 near the outer circumference of the character), and the film thickness in the outer direction rises thicker than the inner film thickness. To be done. The magnetic pattern formed in this way has a clear contour and is excellent in design with a three-dimensional appearance that appears as if it is raised or dented depending on the viewing angle. In the process of forming a magnetic pattern obtained by the latter method, for example, when the cross section of a character is schematically shown, as shown in FIGS. 6 and 6, a large amount of magnetic powder material is attracted toward the outer circumference 14 and the inner circumference 15 of the character. Then, a magnetic pattern is formed so that the portion attracted in a large amount rises. The magnetic pattern formed in this way has a clear contour and is excellent in design with a three-dimensional effect in which characters appear to be raised.

[0027]

EXAMPLES The present invention will be described in more detail below with reference to examples. The scope of the present invention is not limited to the examples.

Example 1 A plastic black coated plate was obtained by coating a plastic plate (thickness: 3 mm) with a two-component urethane paint (black) to a film thickness of 20 μm. On the surface of the coated plate, 17 parts by weight of a magnetic powder material (stainless steel, particle size 10 to 30 μm, scaly form) was added per 100 parts by weight of resin, and a two-pack type acrylic urethane coating was formed to a film thickness (solid content) of 15 μm ◎ character was screen printed. In the printing, a sheet-shaped permanent magnet cut into a letter ◎ was fixed on the back surface of the plastic black coated plate so as to overlap with the letter ◎ screen plate through the plastic plate, and the above paint was screen-printed on the surface of the plastic plate. The part to which the permanent magnet was fixed was printed, the magnetic powder material was oriented, and the letter "A" appeared. After that, the permanent magnet was removed, and the obtained pattern sheet was heated at 80 ° C-3.
It was baked for 0 minutes to cure. Further, a 2-liquid acrylic urethane clear film was overcoated thereon by screen printing and baked at 80 ° C. for 30 minutes to cure. As a result, the characters that appear to be raised or dented depending on the viewing angle have a rounded, three-dimensional effect.

Example 2 A sheet-shaped permanent magnet cut in a letter ◎ was fixed to the back surface (release paper side) of a plastic film black (made by Dainippon Ink and Co., Ltd., for adhesive sheet), and powder on the front side. A two-component acrylic urethane paint prepared by adding 20 parts by weight of magnetic material (chrome powder, particle size: 10 to 30 μm) to 100 parts by weight of resin is screen-printed with a ◎ character so that the film thickness (solid content) is 15 μm. did. Printing was performed on a portion (a portion other than the letters of the magnet) where the ◎ letters of the screen printing letters and the letters of the permanent magnet did not overlap with each other through the black of the plastic film. The part where the permanent magnet was fixed was not printed, and the orientation of the magnetic powder material was performed in the peripheral part of the character, and the boundary with the character appeared strongly. After that, the permanent magnet was removed, and the obtained pattern sheet was baked at 80 ° C. for 30 minutes to be cured. Further, a 2-liquid acrylic urethane clear film was overcoated thereon by screen printing and baked at 80 ° C. for 30 minutes for curing. As a result, it had a three-dimensional effect in which the characters were visible.

[0030]

As described above, the magnetic pattern sheet of the present invention is superior to the conventional one in that it has a three-dimensional effect in which characters and patterns appear to be embossed.

[Brief description of drawings]

FIG. 1 is an elevational view of a conventional patterned coating film sheet.

FIG. 2 is a cross-sectional view of a conventional patterned coating film sheet.

FIG. 3 is an elevational view of the present invention.

FIG. 4 is a sectional view of the present invention.

FIG. 5 is a sectional view of the present invention.

FIG. 6 is a cross-sectional view of the present invention.

[Explanation of symbols]

 1: Magnet 2: Base sheet 3: Magnetic powder-containing colored layer 3 ': Liquid coating film 4: Characters 5: Strong magnetic field part 6: Magnetic powder 7: Magnetic powder-containing liquid material 8: Screen 9: Outer circumference 10: Outer circumference inner vicinity 11: center 12: inner circumference outer vicinity 13: inner circumference 14: outer circumference 15: outer circumference

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G09F 9/37 311 Z 6447-5G

Claims (3)

[Claims] 1. A magnetic pattern sheet, wherein a magnetic powder-containing colored layer is partially provided on the upper surface of a base sheet, and a magnetic pattern is formed on the colored layer by the action of magnetic force. 2. A magnetic powder-containing coloring layer is partially provided on the upper surface of the base sheet, and a magnetic pattern is formed by the action of magnetic force from the lower surface portion of the base sheet corresponding to the same portion as the coloring layer. Magnetic pattern forming method. 3. A magnetic powder-containing colored layer is partially provided on the upper surface of the base sheet, and a magnetic pattern is formed by the action of magnetic force from the lower surface of the base sheet corresponding to a portion different from the colored layer. Magnetic pattern forming method.