JPS58210880A - Formation of sharp embossing - Google Patents

Abstract

PURPOSE:To obtain a sharply embossed surface by coating the surface of the rugged pattern having the uncured surface formed of a curable resin which is retarded in curing of the surface by air and liquid repellent ink with a film to shut off air thereby hardening the surface as well. CONSTITUTION:A pattern is printed on a base material 1 by using liquid repellent ink 3, and a curable resin 4 which is retarded in curing by air is coated thereon to obtain the recessed surface identical to the pattern. The resin 4 is then solidified while only the surface layer thereof is held uncured. The uncured part 4' is coated with an air shieldable coating material 5 (film, belt, drum or the like). The material 5 is removed after the entire part is cured. The decorative plate formed with sharp embossing is thus obtained.

Description

Detailed Description of the Invention In more detail, a pattern is printed on a base material using liquid-repellent ink, and then a transparent resin is coated on the base material and then solidified to form a makeup with a four-part surface that matches the pattern. The method for producing the resin is characterized by using a curable resin that is inhibited by air, and leaving only the surface layer uncured, and then covering with an air-blocking film or the like to completely cure the resin. This article relates to a method for forming soyape embossing.

As a method of so-called 6-tone embossing, which has unevenness that synchronizes with the pattern, Jubei prints on the base material using an ink that has the property of repelling the topcoat resin for a part of the ink printed on it, and then coats it with a topcoat. A method has been proposed in which a resin is applied in a liquid state and then solidified so that a portion of the top coated resin on the pattern forms a concave portion (Ro.ko θ). Not only can a top coat resin be applied, but the concavities and convexities themselves have the advantage of being more concave compared to a method that uses the difference in curing shrinkage of the top coat resin. The shape of the outer edge is not sharp, leaving a visually so-called edged feeling, and when applied to a wood grain pattern, etc., it has the disadvantage that it is far from expressing the wood texture.

The following methods have been proposed to improve and alleviate this drawback: (2) Conventional methods to eliminate the gloss of the surface coating resin to reduce the reflection of light at the border area and make it visually unnoticeable; Methods such as reducing the amount of ink and solidifying it before the oil surface equilibrates after repelling, and adjusting the gloss of the repellent ink to reduce the appearance of the border area1) are carried out. However, none of these methods can be expected to be sufficiently effective.
Furthermore, the first and third methods have a problem of limited gloss, and the second method has a problem of coating suitability.
) was difficult to resolve.

In order to improve the above-mentioned drawbacks, the inventors of the present invention first tried to flatten the coating by applying heat and pressure using an embossing plate after curing, and to crush the bulge of +1W at the border. . In this method, some effects were seen depending on the hot pressure conditions and the gloss of the surface of the embossing plate, but it was found that there is a limit to the embossing after curing of 4f hardening and 1 fat.

Next, the present inventors used methods such as increasing the viscosity of the topcoat resin θ) and slightly advancing curing to reduce the fluidity and bring the embossing plate into contact with the resin in a sagging state to smooth the surface and improve the border area. 3. This method was sometimes only effective in the laboratory stage, but the Mlt type of the embossed plate did not work smoothly unless the resin had hardened, and the resin The method to increase the viscosity (the method described above is the conventional method described by AfJ? It has the same defects as the method described above, but the method to slightly advance the curing is
It was difficult to control the degree of hardening.

On the other hand, the present inventors have proposed a film method normally used in the production of two polyester vanity plates, that is, an unsaturated polyester resin applied in liquid form to the base surface. An attempt was made to apply to this purpose a method of restoring the surface, deaerating the resin, allowing the resin to harden, and then removing the film. That is, this is the b method, in which the film is layered closely when the top coat resin has high fluidity, and the film is removed after curing, thereby eliminating edges and creating a smooth surface with the gloss of the film transferred. This method does not substantially require heat pressure in the fifth stage of embossing, so there is little deformation due to these factors, but since the resin has high fluidity, it is difficult to adhere the film statically and uniformly. 1Bam”l:.

However, it is difficult to maintain this over a large area.

Based on the results of the studies mentioned above, liquid-repellent inks
In order to obtain a sawp-like unevenness with the synchronized embossing (after the unevenness is formed, the resin has hardened to some extent,
-) It is necessary that q% has a surface that can be easily deformed with an embossed film, etc., and such condition 4
- As a result of the search, the inventors found Radical City f.

11 Q) It was discovered that the hardening inhibition phenomenon caused by oxygen can be used for this purpose, and the present invention was completed.1. l, -4
- In other words, the present invention uses a top coating resin for L71-5 as described in the claims, and a curable resin that is inhibited by surface oxidation by air (oxygen), and the surface is exposed to air. By performing the initial N conversion, a stable hardened state is created in which only the surface resin 1- is uncured and can be easily deformed, and after this is covered with an air-blocking film, belt, drum, etc. Furthermore, by applying hard IL', the coating resin layer, including the surface layer, is completely hardened to 1 hardness, and the edges of the outer edge of the ink are extremely small, and the surface gloss of the coating is reduced. This is a method for forming a soyape embossed surface with a transferred smooth surface.

The up-tilting resin used in the present invention may be any radically polymerizable resin that is not inhibited by air curing, and unless it is completely air-dryable, it may be an unsaturated polyester. f, (meth)acrylic acid ester oligomer, curable acrylic system mainly composed of monomers 1
Fats and their modified products such as sial phthalate Shin-1 fat can be used. There are no particular limitations on these curing methods;
Any method can be used, such as thermal curing using a radical polymerization initiator, room temperature curing using a redox catalyst, ultraviolet curing using an optical chassis initiator, or electron beam curing.

Air shielding property σ] Materials that can be brought into contact with the surface of the uncured resin and can be peeled off after curing are used, such as polyester film, polyglopylene film,
Canine iron film, vinylon film internal glass film, release paper tube σ]/t-shaped proboscis, belt, drum, etc. shape σ) Guffs, metal, etc. may be used, but depending on the curing method, for example, ultraviolet curable coating resin In this case, a transparent HA'jM is desirable. Further, since these surface shapes are transferred to the surface of the cured resin 1-, they may be matted or otherwise processed (.sigma.) as desired.

Any well-known liquid-repellent ink may be used, and usually ink with υ11 added, such as 7 silicone oil or fluorine compounds, is used. It is also optional to erase it.

Examples are given below, but the present invention is not limited to these unless it departs from the spirit thereof.

(Example 1) PVC/'
Using acrylic copolymer as a binder and i6 ink, a pattern of wood was gravure printed to create a base material. Finally printed. This 'two from ultraviolet &
l Cured acrylic flexural surface 20 μ thick ■ Coating, 80 W
10 mA using one medium pressure mercury lamp with output σ
After irradiating at a speed of 1000 m, a 25μ thick polypropylene cloak film was layered from one layer to 100 nm using the same mercury lamp.
After passing twice at a speed of m/1 itn, the matte film was peeled off.

As a result, an elegant wood-grained tote with a transparent envelope on the surface of the cloak with a concave conduit portion and a fat layer was obtained.

(Example 2) ・60 gltd (1) Apply a roller to prevent the product from showing through on colored paper with a 14 fat reinforcement layer, gravure print a wood grain pattern on it using a binder ink such as nitrocellulose, and apply 15 g of dimethyl chloride only to the conduit section. Decorative paper was created using ink containing %. This decorative paper (2.71 JI thick Rawalawan) was pasted with a vinyl acetate adhesive layer ^11, and unsaturated polyester resin was applied to the surface using a flow coater (-) to a thickness of 25. After 10 minutes, a vinylon film stretched over the frame was applied. The film was covered and allowed to stand at 40"C for 24 hours, and then the film was peeled off. As a result, a polynisdel <r: It Fr root having a notopically concave conduit surface was obtained.

[Brief explanation of drawings]

The drawings show an example of the method of the present invention, and FIGS. 1 and 2 are cross-sectional TFN diagrams showing the state of M IJS 1 resin coated on liquid-repellent ink. When the viscosity of the liquid fat is relatively high, Fig. 2 shows a low t-field of 8-t/-, schematically 71 t/-. Figure 3 shows air curing IX (1 harm σ). Figure 4 shows how to apply a film over the resin and expose it to air to partially harden it.
The figures are cross-sectional views schematically showing +/m after the film was peeled off after complete curing. 1 Base material 2 Directly managed printing ink layer or base material 3 1 tank of liquid-repellent ink! I-H coating resin layer (before curing) 411! (Uncured portion) 4 #/l (cured portion) 5 Air barrier film

Claims (1)

[Claims] (11) Printing a pattern on a base material using liquid-repellent ink, coating the top resin on top of the pattern, and then solidifying it. In this method, a curable resin that is inhibited from curing by air is used as the coating resin, and after leaving only the surface layer of the curable resin in an uncured state, it is applied to air-blocking films, belts, trams, etc. (2) A method for forming a sharp emboss, characterized in that the transparent resin is completely cured after being cured. The method described in section.