JPH0622993B2 - How to make three-dimensional colored paper - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a three-dimensional color paper, which is formed by drawing a pattern on a color paper base by electric flocking.

<Prior Art> Generally, a colored paper stand is made of all-paper, and a pattern is drawn on its surface by handwriting or printing. However, since this pattern is flat, it does not have a three-dimensional effect. Therefore, conventionally, a stuffed animal having a predetermined shape is made of paper, cloth, or the like, and the stuffed animal is attached to the colored paper stand.

However, it takes a lot of time to form the three-dimensional color paper in this way, which is not suitable for mass production.

Therefore, by planting piles by electric flocking,
It is conceivable to form a three-dimensional image on the surface of the colored paper stand.

<Problems to be Solved by the Invention> However, there are the following problems in performing electric flocking processing on a colored paper board made of all-paper.

Generally, the electric flocking process includes a step of forming an adhesive layer on a substrate, a step of driving a pile into the uncured adhesive layer, and a step of curing the adhesive layer.

In one of these processes, when an adhesive is applied with a colored paper board made of all-paper as the base material, (1) When an emulsion type is used as the adhesive, "shrinkage" or "warpage" of the colored paper board occurs due to moisture. There is a risk. Further, since the adhesive component (fine particles) also soaks into the colored paper stand, the adhesive component remaining on the surface of the colored paper stand is reduced.

As a countermeasure against this, it is conceivable to increase the viscosity of the emulsion type adhesive (about 40,000 to 60,000 cps). However, in doing so, when the adhesive is screen-printed in accordance with a predetermined pattern, the screen (silk gauze, nylon gauze, tetron gauze, etc.) is clogged, and the moldability is deteriorated.

(2) When a solvent type adhesive is used,
The solvent may soak into the colored paper board and cause it to discolor (create "spots").

Therefore, the present inventor considered embedding the shielding layer in the colored paper stand in order to prevent water and the like from seeping into the colored paper stand. In other words, the colored paper board has a three-layer structure of a paper substrate (backing paper) -shielding layer-cover (Japanese paper layer). Here, the shielding layer is for preventing permeation of water and the like, and is considered to be a thin film made of resin, ceramics, metal or the like.

If the colored paper stand is constructed in this way, the above (1), (2)
Will be solved.

However, in the process in which the present inventor was studying the electric flocking process, when the electric flocking process was performed by using the above-described three-layered colored paper stand, the case where the flocking could be uniform in a short time and the case where it was not There were cases. If the flocking cannot be made uniform in a short time, it will be unsuitable for mass production of three-dimensional color paper.

<Means for Solving the Problems> The present inventor has conducted extensive studies in light of the fact that the uniformity of flocking depends largely on the step of driving a pile into the adhesive layer, and as a result, as a result of the above-mentioned shielding layer, When I applied a metal thin film, I realized that uniform flocking could be done constantly in a short time, and I conceived the following invention.

A pattern is drawn with an adhesive on the surface of the Japanese paper layer of the colored paper board, which is formed by sequentially laminating the metal thin film layer and the Japanese paper layer on the substrate, and a pile is driven into the adhesive layer by static electricity to cure the adhesive layer, A method for producing a three-dimensional colored paper, which is characterized by performing electro-implantation processing.

<Detailed Description of Means> Hereinafter, the configuration of the colored paper tray 1 used in the method of the present invention will be described in detail with reference to FIG.

The colored paper base 1 comprises a substrate 3, a metal thin film layer 5 and a Japanese paper layer 9.

The substrate 3 is substantially square and is not particularly limited as long as it has a predetermined rigidity. For example, paper based on pulp, non-woven fabric, synthetic paper or the like can be used.

The metal thin film layer 5 is formed by depositing a metal on one surface of the substrate 3 or by sticking a metal foil to the substrate 3. The material of the metal thin film layer 5 is not particularly limited. Aluminum, iron, nickel, gold, silver, copper or the like can be used. In addition, in order to erase or change the ground color of the metal thin film layer 5, a colored layer can be formed thereon. Washi layer 9 described later
Is usually semi-transparent, so that the color of the metal thin film layer 5 or the colored layer has the color tone of the colored paper board.

The Japanese paper layer 9 is used for covering the metal thin film layer 5 to give the appearance of a colored paper table. The Japanese paper layer 9 is attached by applying an adhesive to the metal thin film layer 5 (or the coloring layer). By making the material of the colored layer a cross-linking type, the Japanese paper layer 9 can be attached using the colored layer itself as an adhesive.

Next, a method of creating a three-dimensional image on the colored paper stand 1 will be described (FIGS. 2 and 3).

First, a pattern is drawn on the surface of the Japanese paper layer 9 on the colored paper stand 1 with an adhesive (adhesive layer 8). The method for drawing the pattern is generally screen printing, but is not limited to this.
At this time, the metal foil film layer 5 serves as a shielding layer, and moisture, solvent, etc. of the adhesive hardly penetrates into the colored paper stand. Therefore, “shrinkage”, “warpage”, “stains”, etc. do not occur on the colored paper stand 1.

After that, with the adhesive layer 8 in an uncured state, as shown in FIG.
A colored paper stand is set as a substrate on the up-type flocking device 10. In the figure, reference numeral 11 is a ground electrode, reference numeral 13 is a DC high voltage generator, and reference numeral 15 is a high voltage electrode. In addition,
The flocking device is not limited to the above-mentioned up-type, and other types such as a down-type and a side-type can be adopted (see “Fiber Processing Handbook” published by Kobunshi Publishing Co., Ltd.). Then, the pile 17 is placed above the electrode 15, and the colored paper base 1 is arranged below the ground electrode 11 with the Japanese paper layer 9 facing downward. When the DC high voltage generator 13 is operated in this state, the pile 17
Is electrostatically induced and jumps to the ground electrode 11 side, that is, the colored paper board 1 side. At this time, the metal thin film layer 5 embedded in the colored paper base 1 is electrostatically induced so that a different kind of electric charge from the electrode 15 is present under the metal thin film layer 5. Then, it is considered that the electrostatic induction is uniformly performed in the conductive metal thin film layer 5. Therefore, the pile 17 also flies uniformly from the electrode 15.

Further, as a result of electrostatic induction of the metal thin film layer 5, different kinds of charges are arranged on the lower surface of the metal thin film layer 5 on the upper side of the pile 17. Therefore, the pile 17 is attracted to this electric charge, and is faster than the one having only the ground electrode (for example, the colored paper board using the resin layer instead of the metal thin film layer 5 as the shield layer).
Will fly up to.

The pile 17 thus flying is evenly adsorbed on the entire surface of the colored paper stand 1. Then, the pile 17 flying to the adhesive layer 8 will be pierced into this.

After that, when the operation of the DC high voltage generator 13 is stopped, the pile 17 that has not pierced the adhesive layer 8 separates from the colored paper table 1. The pile 17 stuck into the adhesive layer 8 remains there and forms a three-dimensional image corresponding to the pattern drawn by the adhesive layer 8. Of course, long piles 1
7 will be used.

Conditions for such flocking (DC voltage, distance between electrodes, application time, etc.) are appropriately set according to the length, thickness, dielectric constant, shape, etc. of the pile 17.

Then, the pile 17 is fixed by curing the adhesive (heating, irradiating light or leaving it at room temperature).

<Example> As shown in FIG. 4, a paper having a thickness of about 2 mm is used as the substrate 23.
An aluminum thin film layer 25 (thickness: 1-1
0 μm) was formed. Then, a yellow-brown crosslinkable coloring layer 27 was formed on the surface of the aluminum thin film layer 25. The silver color of the aluminum thin film layer 25 and the yellowish brown color of the colored layer 27 are combined, and the surface thereof becomes gold. Then, the translucent Japanese paper layer 29 is attached onto the colored layer 27. Since the cross-linking type is used as the coloring layer 27, the coloring layer 27 itself serves as an adhesive for the Japanese paper layer 29.

The colored paper board 21 thus formed was subjected to electric flocking as follows.

(Making of mold) A thick (0.2 mm) Yuzen paper pattern made by glueing Japanese paper with
Cut out with a knife according to the original pattern. Next, using a lacquer varnish, it is attached to a silk gauze of 25 to 30 pieces / inch to prepare a screen printing mold.

(Formation of Adhesive Layer 8) Adhesives 1 to 6 having the following composition are applied to the surface of the Japanese paper layer 29 of the colored paper base 21 using the above mold (thickness: 0.1 to 0.125 mm) to form an adhesive layer having a predetermined pattern. Form. With each adhesive, colored paper stand 2
1 almost did not invade, and accordingly, “shrinkage”, “warpage”, and “spots” did not occur on the colored paper table 21.

[Adhesive 1] Vinyl acetate emulsion (concentration: 40 to 50%) ... 100 parts Plasticizer (TPC, DBP, etc.) ... 3 to 5 parts Methylated methylol melamine ... 5 to 6 parts Catalyst ... 0.5 to 0.6 parts Glycerin or Triethanolamine: 2-3 parts Working viscosity: 50,000 cps [Adhesive 2] Acrylic ester (reactive type): 100 parts Methylated methylolmelamine: 5-6 parts Catalyst: 0.5-0.6 parts Ammonia water (28% solution) … Appropriate amount Use viscosity; 40,000-60,000cps [Adhesive 3] Acrylic ester (self-crosslinking type)… 100 parts Methylated methylolmelamine… 2-3 parts Catalyst… 0.4-0.6 parts Ammonia water (28% solution)… Use appropriate amount Viscosity: 60,000cps [Adhesive 4] (Emulsion type) Self-crosslinking acrylic ... 100 parts Ammonia water (28% solution) ... Appropriate amount Melamine resin ... 5-7 parts Catalyst: 0.8-1.0 part Nonionic activator: Small amount: Viscosity: 50,000cps [Adhesive 5] (Solvent type) Nitrile rubber (Toluene 30% solution): 100 parts Phenol resin (MEK50% solution): 20 parts: Viscosity: 50,000cps [Adhesive 6] Photo-adhesive photosensitive resin: 100 parts Silica ultrafine particles: Appropriate amount Use viscosity: 50,000cps (Flocking treatment) Set a colored paper stand 21 with an adhesive layer formed on the flocking device 10 shown in FIG. Then, electrostatic flocking was performed under the following conditions. After the application was completed, piles were uniformly planted on the adhesive layer.

Distance between poles: 100 mm Voltage: 40 kV Application time: 10 seconds Pile 17: Nylon short fibers (thickness: 1.5 D, length: 0.6 mm) (curing treatment of adhesive layers) Adhesives 1 to 5 are at room temperature By drying (approximately 6 hours).

The conditions for the adhesive 6 are as follows.

Irradiate with direct sunlight for 30 minutes or more at outside temperature of 30 ℃.

Alternatively, at room temperature of 25 ° C., a 40 W chemical fluorescent lamp is separated from the colored paper table by 15 cm and irradiated for 5 minutes or more.

As a result of curing the adhesive layer in this manner, the pile was prevented from falling out of the pile.

<Operations and Effects of the Invention> As described above, since the colored paper stand used in the method of the present invention has the metal thin film layer inside as the shielding layer,
In the step of applying the adhesive when performing the electric flocking treatment, it is possible to prevent the moisture and the solvent of the adhesive from adversely affecting the colored paper board.

At the same time, when the colored paper stand is placed in an electrostatic field as a substrate, the conductive metal thin film layer exists in the colored paper stand, so that the charge on the surface of the colored paper stand facing the pile 17 becomes uniform. Also, since the metal thin film layer itself is electrostatically induced,
The charges on the surface facing the pile 17 are different from those on the upper end (adsorbed portion) of the pile 17. Therefore, the adsorption speed of the pile 17 is increased.

That is, when the colored paper board having such a configuration is used, the electric flocking treatment can be uniformly performed in a short time without causing any adverse effects such as “shrink”, “warp”, and “stain” on the colored paper board.
As a result, it is possible to quickly create a three-dimensional image on the colored paper stand, and it is possible to mass-produce the three-dimensional image colored paper.

[Brief description of drawings]

FIG. 1 is a sectional view for explaining the constitution of a colored paper stand 1 used in the method of the present invention, FIG. 2 is a sectional view showing a state in which an adhesive layer 8 is formed on the colored paper stand 1, and FIG. 3 is an explanatory sectional view of electric flocking. FIGS. 4A and 4B are cross-sectional views for explaining the configuration of the colored paper stand 21 of the embodiment. 1, 21 ... Colored paper board, 3, 23 ... Substrate, 5, 25 ... Metal thin film layer, 8 ... Adhesive layer, 9, 29 ... Washi layer, 10 ... Flocking device, 17 ... Pile.

Claims (1)

[Claims] 1. A pattern is drawn with an adhesive on the surface of a Japanese paper layer of a colored paper base, which is formed by sequentially laminating a metal thin film layer and a Japanese paper layer on a substrate, and a pile is driven into the adhesive layer by static electricity to form the adhesive layer. A method for producing a three-dimensional color paper, which comprises curing and electrostatic flocking.