JPS6020179B2 - Manufacturing method of polyester decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a polyester decorative board having irregularities that match the pattern, and after pasting a patterned paper on a base material,
In the manufacturing method of polyester resin, which consists of applying and curing a polyester resin with unsaturated double bonds containing a polymerization initiator and a polymerization catalyst, a water-absorbing printing ink is applied to a non-water-absorbing film as a pattern paper. The gist of this is a method for producing a polyester decorative board with unevenness, which uses water-blocking printing paper and allows the patterned paper to absorb moisture in the process before applying polyester resin.

Conventionally, as a method of creating unevenness on a polyester decorative board that is synchronized with the pattern, areas with different curing speeds are created in the polyester resin, and by utilizing the shrinkage of the polyester resin as it hardens, boundaries with different curing speeds are created. Due to the unbalanced shrinkage, a method has been adopted in which the portions where the curing speed is slow become concave portions.

'1' is a method for creating areas with different curing speeds.
A method of forming a pattern using a polyester resin that does not contain a polymerization catalyst or a polymerization initiator as a pattern paper using a printing ink that contains a polymerization catalyst or a polymerization initiator, or a method of printing a layer containing a polymerization catalyst or a polymerization initiator. A method of forming a pattern on a base material using printing ink that blocks the action of a polymerization catalyst or polymerization initiator.
21 A method in which a polyester resin containing a polymerization catalyst or a polymerization initiator is used and a pattern is formed using printing ink containing a polymerization catalyst or a polymerization initiator inhibitor or a polymerization inhibitor as a pattern paper, or A method in which a layer containing an inhibitor or a polymerization inhibitor is provided on a printing paper base material, and a pattern is formed on the layer using a printing ink that blocks the action of the agent, using a light-curing polyester resin, A method of forming a pattern using a patterned transparent film that partially blocks light, ■
A method has been considered in which a photocurable polyester resin is used and a pattern is formed using ink containing a photosensitizer as a pattern paper.

In polyester resins, the curing rate correlates with the polymerization rate of radical addition polymerization by saturating unsaturated double bonds.

As a method to retard this rate, [11] In order to retard the polymerization rate, quinones are
A method of suppressing addition polymerization or radicalization of a polymerization initiator such as methyl ethyl ketone peroxide (M former KPO) using a radical inhibitor such as hydroquinones or nitro compounds, '2) Polymerization of cobalt naphthenate, etc. There is a method of suppressing the function of the catalyst using carboxylic acids, etc.

However, these methods have problems in managing the quality stability of printing inks that contain unstable radical agents, etc.
Furthermore, when metal-containing ink is used, the presence of moisture causes the polymerization catalyst to form a collar and lose its catalytic function, and due to variations in environmental conditions, depressions may or may not form. .

In other words, water itself also acted as a factor that retarded the curing speed. As a result of extensive research in order to eliminate these drawbacks, the present inventors have succeeded in developing a stable and simple method for creating unevenness that matches the pattern on a polyester decorative board by using ordinary ink. be.

That is, the present invention allows a printed pattern paper to partially absorb moisture, and uses the absorbed moisture to delay the curing of the polyester resin to obtain a resin emboss corresponding to a pattern. The present invention will be explained in detail below using the drawings. First, as shown in the first diagram, a pattern that is desired to form concave portions is applied to a non-water-absorbing printing base film 1 using a water-absorbing printing ink 2. The printed film 3 thus produced is allowed to absorb moisture and then attached to the base material 4 using the non-printed surface shown in the second figure as an adhesive surface, or it is attached and then allowed to absorb moisture.
As shown in the third diagram, a polyester resin 5 having an unsaturated double bond and containing a polymerization initiation peak and a polymerization catalyst is applied onto the decorative base material thus prepared. In some cases, a release film 6 may be used to give gloss or smoothness to the decorative surface.
After laminating, defoaming. Thereafter, the resin 5 is cured to form a cured resin layer 7 having an embossed surface matching the pattern with the printing ink 2 portion as the concave portion A as shown in the fourth figure. In addition, when the above-mentioned release sheet 6 is used, it is peeled off after curing. If this sheet 6 is left attached until actual use, the surface can be protected. First, as printing base films that are not water-absorbing, ordinary printing can be used, such as plastic films such as acrylic resin, polyvinyl chloride resin, polyester resin, polystyrene resin, and polyolefin resin, and paper that has a water-repellent layer on the surface. Any film can be used. In addition, if the adhesiveness between the polyester resin and the printing paper is not particularly considered, or if the purpose is to peel off the resin layer later, glass, glass, etc. can be used as the base material.
You may also use something like metal. Further, if it is impossible to directly print on such a base plate, a pattern may be provided by a transfer method. The printing ink needs to be a resin that has good water absorption or wettability with water.

Printing inks include resins that constantly absorb and contain moisture in the air, such as water-soluble inks, resins that have a high water wettability index because they contain surfactants, and resins that have a high water wettability index due to their high pigment content and rough surfaces. Resins that have a high porosity index, resins that have foamed cells that easily absorb water on the surface of the ink like foamed ink, and resins that have a sponge-like porosity and are used. Particularly in the case of foaming ink, the substance used as a foaming agent has a redundant effect as a curing inhibitor, making it possible to create a product with excellent three-dimensional appearance. Furthermore, these inks may have the above-mentioned properties alone or in combination. The explanation regarding the printing ink refers to the ink used in the areas that should become recesses, and it is necessary to print with ink that does not have the above-mentioned properties for ink in areas that do not need to become recesses. It is. Printing methods include conventional printing methods such as gravure, offset, letterpress, silk screen, and flexography, and can be applied in a single color or in multiple colors. It may also be done by drawing. Next, the printing film is attached to a substrate depending on the final purpose, but the material of the substrate does not matter in this method.

In consideration of the versatility of the present invention, suitable base materials include, for example, plywood, particle board, fiber board, and the like. Impregnation with water is carried out from the printed surface of the prepared IQ shogimura or before it is pasted on the base material.
Methods for this include immersion in water, impregnation from the printed surface with an impregnation roll, or spraying with steam spray. At this time, it is more effective to wipe off excess moisture from areas other than the necessary areas after hydration.
Furthermore, when the ink itself has water-retaining properties, such as water-soluble ink, this water impregnation step is not necessarily necessary.
The water applied in this manner acts as a polymerization inhibitor, but in order to further enhance this effect, the water may be made acidic or alkaline, or a polymerization inhibitor or a polymerization catalyst inhibitor may be mixed therein.

Alternatively, the same effect can be obtained even if the water-absorbing printing ink is acidic or alkaline, or if the ink contains the above-mentioned substances. Next, a polyester resin having unsaturated double bonds containing a polymerization initiator and a polymerization catalyst is applied onto the decorative surface having portions with different moisture contents.

As the polymerization initiator, organic peroxides such as MEKP○, benzoyl peroxide (BPO), and cyclohexanoperoxide, azobisisobutyronitrile, and the like are used, and the effective composition thereof is 1 to 3% by weight. Also,
As the polymerization catalyst, cobalt naphthenate, dimethylaniline, etc. are used. In this case, the greater the amount of polymerization initiator, the greater the embossing effect. The polyester resin is cured by a conventional method, for example, by leaving it in air at room temperature. As the release film for controlling the resin liquid, films with release properties such as polyester, vinylon, nylon, Tetron, cellophane, polystyrene, polypropylene, etc. are used.

The smaller the stretching force of the film, the more it follows the movement of the polyester resin and therefore the embossed resin, so the embossing effect is increased. Next, the present invention will be specifically explained with reference to Examples.

"Parts" in the following text represent parts by weight. Example 1 Ink (Morohoshi) containing 0.5 parts of surfactant (amine laurate) and 30 parts of calcium carbonate in 150 μm of PVC film (manufactured by Bando Kagaku Co., Ltd., W23) and using 10 parts of vinyl chloride resin as the vehicle. A tile pattern was printed by gravure printing using V (manufactured by Ink Co., Ltd.).

Next, place this printed paper on a plywood board (2.7cm) with the non-printing side as the contact surface.
/ skin thickness) and vinyl acetate adhesive (manufactured by Chuo Rika Co., Ltd., BA6
20) and immersed in a 0.3N NaOH aqueous solution for 1 minute with the printed side facing down. After removing the base material, wipe the printed surface lightly with a cloth, and apply 10 anchors of unsaturated polyester resin (Polylite, manufactured by Dainippon Ink Co., Ltd.).
A resin solution consisting of 3 parts of MEKP0 and 0.5 parts of cobalt naphthenate was applied to a vinylon film (manufactured by Nippon Gosei Kagaku Co., Ltd.).
Polyester molding was carried out by a film method using an ordinary method using ICERON C200. When this base material was left at room temperature for 5 hours, a sample in which the printed area became a concave portion was produced. Example 2 Solid printing was performed on a PVC material for wallpaper (manufactured by Kyodo Kasei Co., Ltd., 0.3/v) using a PVC ink (manufactured by Showa Ink Co., Ltd., Chemical X), and then a PVC foaming ink was applied. (manufactured by Dainichiseika Co., Ltd.) by gravure printing to print an abstract pattern (ink width 2/m).

Next, after foaming this at 200°C, it was bonded to a plywood base material in the same manner as in Example 1, with the printed side facing down.
It was immersed in an OH aqueous solution with a calculated N ratio of 3 for 1 minute. Next, Example 1
By performing the same operations as above, a recess that perfectly matched the abstract pattern was formed. Example 3 A wood grain pattern was gravure printed on 80 sheets of synthetic paper (Yupo FP80, manufactured by Oji Yuka Co., Ltd.) using a printing ink containing a nitrocellulose resin vehicle (manufactured by Moroboshi Ink Co., Ltd., MA).

Next, the vessel portions that matched the wood grain were gravure printed using foam ink (manufactured by Dainichiseika Kaisha, Ltd.) using a vinyl chloride resin vehicle. Next, this was foamed at 200° C., and then by performing the same operation as in Example 2, a concave portion that was in sync with the vessel portion was formed.

[Brief explanation of drawings]

1 to 4 are schematic cross-sectional views showing each step of the manufacturing method of the present invention. 1... Printing base film without water absorption, 2...
... Water-absorbing printing ink, 3 ... Printing film, 4 ... Motomura, 5 ... Uncured polyester resin, 6 ... Release film ,7...
...Cured polyester resin. Figure - Figure 2 Tsutomu Figure 3 Collection Figure 4

Claims (1)

[Scope of Claims] 1. A method for producing a polyester decorative board including the following steps. (a) A step of producing a printed film in which a non-water-absorbing printing base film is partially made water-absorbing with a water-absorbing printing ink, (b) A step of making the above-mentioned printed film absorb moisture, (c) The above-mentioned printing The process of attaching the film to the base material,
(d) After the moisture absorption and adhesion, applying an uncured polyester resin containing an unsaturated double bond and containing a polymerization initiator and a polymerization catalyst to the surface of the printed film, (e) the uncured polyester resin. A step of forming an embossed cured resin layer having concave portions in the portions corresponding to the printing ink by curing the printing ink. 2 Claim 1, characterized in that the water to be absorbed or the water-absorbing printing ink is acidic or alkaline.
Manufacturing method described in section. 3. The method according to claim 1 or 2, wherein the water to be absorbed or the water-absorbing printing ink contains at least one of a polymerization inhibitor, a polymerization catalyst inhibitor, and a polymerization initiator inhibitor. Manufacturing method.