JPS59132975A - Manufacture of embossed decorative material - Google Patents

Abstract

PURPOSE:To uniformly adjust the gloss of a surface, while making said surface smooth, by printing volatile ink onto the surface of a substrate, applying cross- linking resin as transparent one thereon, and then performing the cross linking of said cross-linking resin and hot-press embossing. CONSTITUTION:After printing is applied onto the surface of a substrate using volatile ink, cross-liking resin as transparent one is applied thereon. Thereafter, the cross linking of siad cross-linking resin and hot-press embossing using an embossing plate having an arbitrary lustrous surface are performed to manufacture an embossed decorative material. For instance, a pattern is printed on the substrate 1 using the volatile ink 2, and then the transparent cross-linking resin 3 is applied thereon to form a coating film and settled. After the coated substrate is heated with a heater 6, it is pressed between an embossing roll 4 and a back-up roll 5 to obtain the embossed decorative plate. For said cross linking method, thermal, ultraviolet or electron rays, etc. may be used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an embossed decorative material, and more specifically, the present invention relates to a method for producing an embossed decorative material. The present invention relates to a method for producing an embossed decorative material, which uses a crosslinkable resin as the resin and, after coating, performs hot-pressure embossing using an embossing plate with an arbitrary hot surface.

Conventionally, as a method of forming surface irregularities that correspond to the pattern,
Various methods have been proposed in which unevenness is formed chemically or physically by imparting special properties to the ink used for the pattern.

Typical examples include a combination of hardening inhibitory ink and curable resin that utilizes the contraction of the resin when it hardens to cause the resin on the inhibitory ink to cave in and form unevenness, and a combination of hardening accelerating ink and curable resin that creates unevenness. A combination of penetrating ink and top coat resin that utilizes the difference in permeation of the resin onto the printing surface; A combination of penetrating ink and top coat resin; heat generating properties of the ink and base material. The difference in the difference is expressed as a difference in the shrinkage of the base resin or the surface resin, but only the ink part is made to differ in its resistance to solvents or mechanical abrasion.
A method that shrinks or removes only the resin in the ink area by means such as polishing, and forms unevenness by making use of the affinity or adhesiveness difference between the ink and the resin and attaching or not allowing the resin to adhere to the surface only in the ink area. Examples include those that form unevenness by repelling using the difference in the wettability of the resin between the ink part and the non-inked part.

All of these methods are superior to mechanical methods, that is, methods using a combination of embossing plate or embossing roll and printing, in terms of synchronization with the printed pattern, but generally the depth of the embossing is In particular, in many cases, the selectivity of the ink alone (the base material and especially the surface resin is low), which limits the range of applications for the product.

In order to solve these problems, the present inventors have developed a method for ℃ synchronized embossing, which has excellent embossing depth and stability and has low resin selectivity, by printing on a base material with a liquid-based ink.
In January, I discovered a method of forming synchronous concavities and convexities using a transparent resin coating, and as a result of reviewing the problems of the conventional technology, I was happy to complete the invention of wood.

It is well known that the wettability of the coating resin to the substrate surface differs depending on the Sogetsu type, and that the shape of the coating resin film can be changed by partially changing the critical interfacial tension on the surface of the base material by printing or other means. Many reaction force methods have been proposed for forming irregularities or surface shapes using this phenomenon, but the conventional methods have the following drawbacks, especially from the point of view of synchronous embossing.
In other words, when the surface resin on the second part of the ink part moves to another part due to the repelling of the surface resin, first, if the ink part is wide, it does not move completely to both sides, and it moves onto the ink. C remains on the point, and therefore, the pattern is limited. Also, the shape of the boundary between the printed part and other parts depends on the surface tension of the surface resin, so it becomes rounded and sharp. The purpose of the invention is to solve the latter problem. In order to solve the problem, after forming the synchronized unevenness, we used an embossed plate with a desired gloss and applied heat and pressure to smooth the surface and adjust the surface gloss to a constant level. In order to make it flexible, G resin should be used for the frame 1 as the surface resin. Below -
Details of the invention will be explained based on Fig. 111i. Fig. 1 shows a state in which liquid-repellent ink (2) is applied on a base material (1) and pressurized between picture up rolls (5). , FIG. 4 shows schematic cross-sectional views of the respective states after pressurization.

Also, Figure 5 shows the transparent frame A'*fG IJ + resin (3)
FIG. 2 is a schematic diagram showing a comparative example of bonding using a thermoplastic resin material instead of the material.

The base material that can be used in the present invention is marked I+ill 7:l.
″=ni]′ and does not deform significantly due to the heat and pressure in the hot-pressure embossing process.
Inorganic board etc. are optional. Furthermore, as the liquid-repellent ink (2), which may be surface-treated including printing, transparent racks 4. ．． fH resin (b)
Any material that can be repelled and form unevenness when uniformly applied onto the J-printing substrate may be used.It varies depending on the ease with which the crosslinkable resin wets the surface of the binder (1), but in general ( As an interfacial tension reducing agent, a silicone oil such as dimedyl silicone, a silicone compound, or one of various surfactants is usually added to the ink.

・The cross-stripe resin (3) is first of all a transparent sphere resin that can be coated in liquid form and solidifies to form a film by cooling, volatilization of a bath medium, cross-linking, etc.
Material 11) Wet the surface and apply liquid repellent ink (2) on the surface.
It is necessary to be repelled by SeF1 fat. Although there are many resins that do not meet this condition, the present inventor Hg7 further conducted a review and came to the following conclusion. , polyacrylic acid ester, polyvinyl 4'11, cellulose, polyamide, polyacrylamide, and other resins, or copolymers thereof! ′! : Regarding materials with high heat deformation temperature, it is not only difficult to heat pressure embossing, but also (polyolefin,
For polyamide and other crystal-prone resin films with a low melt viscosity at ℃, even the embossed areas formed by repelling during hot-pressure embossing are exposed to melt pressure, making it difficult to emboss in sync with the pattern.
The liquid-repellent ink (2) will not be able to be used for partially crystalline or high melt viscosity resin films such as polyvinyl chloride and Nisdel polyacrylate due to heat and pressure conditions. Although some embossments remain, in most cases, as shown in Figure 5, a film of thermoplastic resin 3'' flows onto the liquid-repellent ink (2), significantly impairing the effect of synchronous embossing. General thermosetting resins such as melamine/porus, aldehyde resin, phenol/formalnacht resin, urea/
In the case of formaldehyde resin, allyl position/1 fat, unsaturated polyester resin, etc., after curing is completed, high pressure and heat are not only required for embossing by heat pressure, but it is also extremely difficult to form grains uniformly. It's difficult, and the $4 million side is also big.

In view of these points, what is suitable as the surface resin is a crosslinkable resin that has flexibility and heat deformability that can at least be used for hot pressure embossing on the surface after the crosslinking. It is desirable to have a resin that has deformability but has greater strength and resistance in the final product, and furthermore, a resin whose physical properties are not significantly influenced by subtle variations in manufacturing conditions.For this purpose, Acrylic acid ester polymers, oligomers, monomers,
Crosslinked modified acrylic resins such as crosslinked acrylic resins containing one or more of crosslinking aids or their urethane modified products; crosslinked polyurethane resins containing acrylic polyols or polyester polyols and polyincyanates; multifunctional or monofunctional It has been found that crosslinkable resins such as unsaturated polyester resins containing vinyl monomers are optimal.

Any method can be used for crosslinking, such as heat, ultraviolet rays, or electron beams, but the surface resin is ultimately the best! ! In the case of the surface of a Q-product, a resistance of strong 19 is required, so in the case of crosslinking Ll, in which post-crosslinking progresses over time, and in the case of 14 polyurethane resin, crosslinking by heat treatment is recommended. If there is a speed problem, use ultraviolet rays to slightly progress post-crosslinking; 4-chill resin or suitable 4-chill resin or heat-pressure embossing at The present invention is not limited to the infrared heating and roll embossing shown, and any means can be used depending on the crosslinkable resin, the degree of embossing, etc.

Next, examples will be shown.

Example 1 Basis weight 50', 9. A wood grain pattern is printed using curved ink on resin-mixed paper of 200 mm, and after 1 minute, only the conduit pattern is printed with a liquid-repellent ink containing 2% dimethyl silicone, and a cross-linked urethane resin containing acrylic polyol and polyisocyanate is dried. The coated paper was coated to a weight of 9 mm and 17 mm, and was embossed using an embossing machine equipped with a matte roll to obtain a decorative paper with a sharp conduit-tuned embossed surface.

In addition, an ink with a 21-cellulose binder is normally used, and printing is carried out after applying a urethane sealer.Also, a commercially available acrylic polyol with a concentration of 32% for molding is used. The embossing condition when adding the diisocyanate polymer was 160
It was heated at 75Ky/(geese pressure).

Example 2 o1s+familiar j! A wood grain pattern is printed on a colored polyvinyl chloride sheet (No. 9) using regular ink with a salt-resistant vinyl/acrylic binder, and finally, only the conduit pattern is printed with dimethyl silicone IJ, 7%.
Printed paper was created by printing with ink containing

To this was added an ultraviolet scissors cross-linked acrylic resin containing an acrylic acid ester oricomer-1 7-mer-1 photosensitizer at 15 sif/m.
'It was coatinized and irradiated with an 80W//X medium-pressure water scissors lamp, and then embossed continuously using an embossing machine equipped with a matte roll to obtain a sharply symmetrical embossed decorative sheet. The embossing conditions at this time were a maximum sheet surface temperature of 1110" and a C1 pressure of 5.5 Kp/CrrL9.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a pattern printed on a base material using liquid-repellent ink, and Figure 2 is an illustration of a state in which a transparent cross-linked resin is coated on the base material and a pattern made of liquid-repellent ink. and coating resin? FIG. 6 is an explanatory diagram of the solidified state, FIG. 6 is an explanatory diagram of the state in which the layered body shown in FIG. Figures 5 and 5 are explanatory diagrams of an embossed cosmetic obtained by coating a pattern made of liquid-repellent ink with a thermal 0T plastic resin, respectively. (1) Base material (2) Liquid repellent ink +31. (31'... Frame A'fL Resin f4 embossing roll + 51-° Back up roll (6)°
Heater patent applicant Toppan Printing Co., Ltd. Representative Kazuo Suzuki

Claims (1)

[Scope of Claims] 1) In forming a synchronous uneven surface by printing a liquid-repellent ink on the surface of a substrate and then coating it with a transparent resin to form four parts only on the liquid-repellent ink, A method for producing an embossed cosmetic, characterized in that a crosslinkable resin is used as the transparent resin, and that after coating, crosslinking of the crosslinkable resin and heat-pressure embossing is performed using an embossing plate with an arbitrary hot surface. 2) As the crosslinkable resin, one or a combination of two or more selected from the group consisting of crosslinked acrylic resins, crosslinked modified acrylic resins, crosslinked polyurethane resins, and unsaturated polyester resins containing monofunctional or polyfunctional monomers. A method for producing an embossed decorative material according to claim 1, characterized in that a resin comprising: 5) The method for producing an embossed decorative material according to claim 1 or 2, characterized in that an ultraviolet or electron beam curable resin is used as the crosslinkable resin.