JPH0691838A - Decorative sheet with thick coating - Google Patents

Abstract

PURPOSE:To easily obtain a coated decorative sheet having an irregular pattern on its surface by a method wherein a top coating layer of a resin prepared by mixing a urethane acrylate prepolymer having specific coating thickness and average molecular weight in a monofunctional acrylic monomer is provided on a surface layer. CONSTITUTION:A thermoplastic resin layer 2 provided with color coating material-filled recessed parts on its surface is provided as a surface layer. Thereon, a coating layer of a coating agent prepared by mixing a urethane acrylate prepolymer having an average molecular weight of 1000-10000 in a monofunctional acrylic monomer is formed. By curing the coating layer by an ionizing radiation, a decorative sheet having a top coating 6 is obtained with a thickness not less than 15mum. A urethane acrylate prepolymer/ monofunctional acrylic monomer ratio in the coating agent is preferably 40-60/60-40wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet to be attached to various kinds of furniture, building interior materials, etc. for the purpose of decoration or surface protection, and in particular, a makeup suitable for expressing uneven patterns such as wood grain. Regarding the board.

[0002]

2. Description of the Prior Art Various attempts have been made as conventional methods for producing a decorative sheet having a concave-convex pattern on the surface of a decorative sheet that is attached to the surface of a base material such as furniture or building material for the purpose of decoration or surface protection. It has been made, as an example, for example, a colored PVC film on the substrate, a pattern printing PVC film,
A transparent vinyl chloride film is formed on the surface of a thermoplastic resin layer with embossed recesses, so that the surface of the makeup sheet is colored by applying a wiping treatment with a colored paint to the inside of the recesses formed on the surface of the makeup sheet. After filling the paint, after forming a coating layer of the ionizing radiation curable resin-based coating agent on the wiping treated surface,
By curing the coating layer with ionizing radiation,
A decorative sheet having a top coat layer having a thickness of 1 to 5 μ is obtained.

[0003]

However, in the prior art as described above, the top coat layer made of the ionizing radiation curable resin is usually formed to have a thickness of about 1 to 5 .mu. Also, in terms of design, high quality and high quality cannot be obtained.

The present invention has been made in view of the above problems, and is a makeup sheet having a top coat layer having a thickness of 15 μm or more made of an ionizing radiation-curable resin, and a surface uneven pattern. It is possible to easily and surely provide a paint-like makeup sheet that the user has.

[0005]

Means for Solving the Problems The gist of the present invention for achieving the above-mentioned object is that the thickness of the thermoplastic resin layer surface forming the surface layer of the decorative sheet is 15 μm or more by the ionizing radiation curable resin. And is characterized by being a coating agent for forming the topcoat layer. Further, by combining the vehicle and the solvent of the wiping paint filled in the concave portion formed in the thermoplastic resin layer forming the surface layer of the cosmetic sheet, the solid content is changed and the depth of the concave portion is changed. It is characterized by having gradation.

In the cosmetic sheet of the present invention, a concave portion is provided on the surface, and a thermoplastic resin layer filled with a coloring paint is used as the surface layer in the concave portion, and the thermoplastic resin layer forming the surface layer is A urethane acrylate prepolymer having a weight average molecular weight of 1,000 to 10,000 is mixed in a monofunctional acrylic monomer to form a coating layer by a coating agent, and then the coating layer is cured by ionizing radiation. Thus, a cosmetic sheet having a top coat layer having a thickness of 15 μm or more is obtained.

Then, by adjusting the filling amount of the colored paint to be filled in the recessed portion, a thick coating paint-like makeup sheet for forming an uneven pattern on the surface can be obtained.

Further, the colored paint to be filled in the recess is a water-soluble colored paint, and the solid content of the water-soluble colored paint is
By adjusting the content to 20 to 30%, a thick coating paint-like makeup sheet in which the uneven pattern on the surface is more emphasized is obtained.

In the decorative sheet of the present invention having the above-mentioned constitution, the coating agent obtained by mixing the urethane acrylate prepolymer having a weight average molecular weight of 1,000 to 10,000 into the monofunctional acrylic monomer is a urethane acrylate. It consists of applying a coating agent in which the proportion of the topre polymer and the monofunctional acrylic monomer is 40 to 60% by weight: 60 to 40% by weight.

When the weight average molecular weight of the urethane acrylate prepolymer mixed in the monofunctional acrylic monomer becomes less than 1000 or exceeds 10,000, the cosmetic sheet is distorted or curled. High quality top coat with thickness of 15μ or more without generating
It is not easy to form a coating layer.

Even if the topcoat layer is colorless and transparent,
Alternatively, it may be colored transparent or even matte transparent, and a urethane acrylate prepolymer having a weight average molecular weight of 1,000 to 10,000, preferably 4,000 to 10,000 may be used, for example, lauryl acrylate, 2 −
Ethylhexyl acrylate, 2-hydroxyethyl acrylate, 1,6-hexanediol monoacrylate
The coating agent obtained by mixing it with a monofunctional acrylic monomer such as bismuth, dicyclopentadiene acrylate, etc. is, for example, roll coat, reversate, gravure coat, gravure reversal. -Coated with a coat or the like and cured by ionizing radiation.

Examples of the base material for the decorative sheet include a polyvinyl chloride film, a polyolefin resin film, a polyester resin film, an acrylic resin film, and the like, and a curable top coat formed on the surface of the decorative sheet. -The surface resin layer is made of a vinyl chloride resin, an acrylic polyol resin, or a mixed resin of an acrylic polyol resin and a vinyl chloride / vinyl acetate copolymer resin in terms of the adhesion property with the coating layer. Those that have been described are preferable.

The base material for a cosmetic sheet is provided with a print that represents, for example, wood grain, stone grain, surface pattern of natural leather, texture, abstract pattern, etc. It is preferable to form recesses having a shape similar to wood grain conduits, stones such as stats and travertines, squeezing leather, and textures similar to the texture, in combination with the above-mentioned printed pattern. is there.

The base material for a decorative sheet having a concave portion may be the one in which the concave portion is directly formed on the above-mentioned printed surface, or a thermoplastic synthetic resin sheet on which printing is applied. -By so-called doubling embossing, which is obtained by laminating a separately prepared thermoplastic synthetic resin on the printed surface of the sheet by thermal bonding and performing shaping by embossing on the surface of the laminated sheet The laminated sheet may be a laminated sheet, and in particular, a laminated sheet obtained by doubling and embossing another polyvinyl chloride film onto a polyvinyl chloride sheet having a printed surface is used. Most preferably, it is used as a base material for a cosmetic sheet.

Next, paints or inks are used as the fillers to be filled in the recesses of the base material for the decorative sheet. For example, natural resins or modified resins thereof, cellulose derivatives, polyvinyl chloride resins, acrylics. A paint or an ink obtained by using a synthetic resin such as a system resin, a polyester resin, or a polyurethane resin as a constituent material of a vehicle and adding a coloring pigment, an extender pigment, a plasticizer, or the like to the vehicle is used.

This colored coating material is applied to the concave portion of the sheet surface by roll coating or knife coating, and then scraped off with a doctor blade or wiping paper to remove the colored coating material coated on the convex portion of the sheet. Fill with leaving only the colored paint. Here, it is necessary to adjust the viscosity of the coating composition, the number of rotations of the roll, the angle of the doctor, the thickness, the sheet speed, the speed of the wiping paper, the hardness of the rubber roll, etc. so that the colored paint remains only in the recessed portion. As a wiping method, a doctor blade method, a roll coating method, etc.
Any wiping method conventionally used may be used.

The types of paints used for the colored paint include aliphatic hydrocarbons, aromatic hydrocarbons, organic solvents such as esters, ketones and alcohols, or 2
There are cases of an oily type dissolved and dispersed in a mixed system of one or more kinds, and a case of a water soluble type using water as a solvent. When the oil-based coating material is dissolved and dispersed in an organic solvent and is used in a state where the solid content is 30% or less, the solvent contained in the coating fluid damages the thermoplastic resin sheet, which is not practical. Therefore, in the present invention, by developing and using 20 to 30% of a water-soluble color paint, it becomes possible to fill the concave part of the decorative sheet with the color paint without damaging the thermoplastic resin sheet. It was

[0018]

EXAMPLES The concrete constitution of the makeup sheet of the present invention will be described below based on examples.

Example 1 In FIG. 2, 100 μm thick colored in sepia
After forming a printing layer 3 similar to an oak wood grain pattern on the surface of the polyvinyl chloride sheet 2 by gravure printing three color inks using a vinyl chloride resin as a vehicle,
The surface of the printed layer 3 of the polyvinyl chloride sheet 2 and a separately manufactured 100 μm thick transparent polyvinyl chloride sheet 4 were heated at a temperature of ...
・ 160 ° C, linear pressure ・ ・ ・ 1t, speed ・ ・ ・ 10m / m
By doubling embossing with in, both of them were laminated and at the same time, a recess corresponding to a wood grain conduit was formed on the surface of the transparent polyvinyl chloride sheet 4. It should be noted that the embossed plate is a relatively deep embossed plate.
150 μ) was used.

Next, a coating for water-based wiping (composition A ... Showa Ink / AW-5, solid content 27.5%) was applied to the above-mentioned laminated sheet having concave portions formed on the surface by embossing.
Is applied by a roll coat method, and then the wiping paint adhering to the parts other than the recess is removed by a doctor blade, and the colored paint 5 is applied in the recess formed on the surface of the laminated sheet. Is filled and solidified, and the ionizing radiation-curable resin coating is applied to the wiping-treated surface of the laminated sheet by the gravure reversal coat method using a swash plate to form a coating layer 6 having a thickness of 30 μm. Was formed.

After that, 80 w / cm..3 lights, 16
By irradiating ultraviolet rays from a high-pressure mercury lamp of 0 w / cm..1 at a conveyor speed of 20 m / min, a thick paint-like makeup sheet having a deep concave portion and a surface uneven pattern shown in FIG. 2 is obtained. It was

The compounding ratio of the composition A is shown. (Unit is% by weight) Colored pigment 3.0 Silica 2.0 Barium sulfate 2.0 Urethane vehicle 20.0 Defoaming agent 0.5 Water 50.0 IPA 22.5

Example 2 Instead of the water-based wiping paint of Example 1, an oil-based wiping paint (composition B ... Showa Ink / W-141, solid content 47%) was used, and other constitutions By the same procedure as that of the corresponding structure of No. 1, a thick coating paint-like makeup sheet 8 having the surface unevenness pattern shown in FIG.

The mixing ratio of composition B is shown. (Unit is% by weight) Colored pigment 6.0 Silica 4.0 Calcium carbonate 17.0 Urethane acrylic vehicle 20.0 Methylcellosolve acetate 33.0 Xylene 20.0

[0025]

The coating-like decorative sheet having a surface uneven pattern of the present invention is a urethane acrylate prepolymer.
A coating layer having a coating thickness of 15 μm or more may be obtained by curing a coating layer of a coating agent obtained by mixing the above with a monofunctional acrylic monomer by irradiation of ionizing radiation. it can.

The top coat layer of the curable resin is
Since the cross-linking reaction points of the resin in the coating agent used for forming the top coat layer are suppressed, excellent bending workability is achieved even with a thickness of 15 μm or more.

Further, the surface recessed portion of the top coat layer made of the curable resin formed according to the present invention is controlled by the solid content of the above-mentioned wiping colored paint, and even in a thick coated top coat layer having a thickness of 15 μm or more. The design of patterns became possible.

[0028]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a thick coating paint-like decorative sheet of the present invention.

FIG. 2 is a cross-sectional view showing a thick coating paint-like decorative sheet having an uneven surface pattern of the present invention.

FIG. 3 is a cross-sectional view showing another example of the thick coating paint-like decorative sheet having a surface uneven pattern of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Thick coating paint-like decorative sheet 2 1st thermoplastic resin sheet 3 Printing layer attached to the 1st thermoplastic resin sheet 4 2nd thermoplastic resin sheet 5 In a recessed part by a wiping process. Coating 6 filled with a transparent transparent top coat layer of an ionizing radiation curable resin 7 a thick-painted decorative sheet having a surface uneven pattern 8 a thick-painted decorative sheet having an uneven surface pattern

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B32B 27/30 A 8115-4F B44C 3/02 9134-3K

Claims (3)

[Claims] 1. A decorative sheet having a surface provided with a recess and a thermoplastic resin layer having a colored coating material filled in the recess as a surface layer, wherein a weight average molecular weight of a coating thickness of 15 μm or more is provided on the surface layer. A thick coating paint makeup sheet having a top coat layer of an ionizing radiation curable resin obtained by mixing 1,000 to 10,000 of a urethane acrylate prepolymer in a monofunctional acrylic monomer. 2. The thick coating paint-like makeup sheet according to claim 1, wherein an uneven pattern is formed on the surface by adjusting the filling amount of the colored coating material to be filled in the concave portion.
To. 3. The coloring paint to be filled in the recess is a water-soluble coloring paint, and the solid content of the water-soluble coloring paint is 2%.
The thick coating paint-like makeup sheet according to claim 2, wherein the content is 0 to 30%.