JPH09131960A - Transfer sheet, decorative plate using the transfer sheet, and method for manufacturing the same - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a decorative plate in which a highly decorative design is efficiently provided on a decorative plate base material, a method for producing the decorative plate, and a transfer sheet used for the decorative plate. is there. A sealer layer of a transfer sheet is installed so that the sealer layer of the transfer sheet is in contact with the surface of a decorative board substrate coated with a polyisocyanate-curable enamel resin base coat having the same resin system as that of the transfer sheet. After transferring the layers, a topcoat layer is formed to protect the pattern layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative plate in which various decorative plate base materials are efficiently provided with a highly designable pattern, a method for producing the decorative plate, and a transfer sheet used for the decorative plate.

[0002]

2. Description of the Related Art Conventionally, various decorative boards have been used for interiors and exteriors of houses, but in recent years, products having a pattern on their surface have been favored with the tendency to require high quality and high designability. Came. As a method of applying a pattern on the surface, there are paints of multiple colors on the decorative board base, sprinkling sand, laminating a sheet on which a pattern is printed, etc., but other transfer methods using an elastic body or a plastic body There is.

In this transfer method, when a polyisocyanate-curable enamel resin is used as the base coat, heat of about the softening point of the base coat resin must be transferred to the base coat layer when the pattern layer is transferred to the surface of the decorative board substrate. However, there is a problem that the transferability is deteriorated or the adhesion is insufficient. In particular, when the adhesiveness is low, there is a case where after the decorative sheets are applied to the interior and exterior of the house, heat shrinkage is repeated due to changes in temperature and the like, and interlayer peeling occurs with the passage of days, which causes a problem in durability.

There are various materials and structures for the substrate of the transfer sheet, which may be appropriately selected, but polypropylene (PP) laminated paper and polyethylene terephthalate (PET) resin film are selected depending on the cost and the releasability from the pattern layer. Polyvinyl chloride (PVC) resin films have been widely used. However, when transferring with an elastic roller such as silicone, heat is transferred to the base coat layer via the transfer sheet, so the transfer temperature decreases, making it difficult to increase transfer speed while maintaining transferability and adhesion. Met.

[0005]

DISCLOSURE OF THE INVENTION The present invention compensates for the above-mentioned conventional drawbacks, and a decorative board in which a highly decorative design is efficiently provided on a decorative board base material, and a method for producing the same. Another object of the present invention is to provide a transfer sheet used therefor.

[0006]

In order to achieve the above object, the transfer sheet of the first invention is a transfer sheet in which a pattern layer is releasably provided on a base sheet, and a sealer layer is further provided. The layer is characterized by containing a functional group that reacts with the polyisocyanate curable resin.

The decorative sheet of the second invention is mounted so that the sealer layer of the transfer sheet is in contact with the surface of the decorative sheet substrate provided with the polyisocyanate-curable enamel resin base coat whose resin system is the same as that of the sealer layer. It is characterized in that a pattern layer is placed and a pattern layer is transferred, and a top coat layer for protecting the pattern layer is provided.

A third aspect of the present invention is a method for manufacturing a decorative sheet, wherein the surface of the decorative sheet base material obtained by applying a polyisocyanate-curable enamel resin base coat having the same resin system as that of the sealer layer is applied to the sealer layer of the transfer sheet. Are placed in contact with each other, the surface is thermocompression-bonded by an elastic roll heated to 140 to 160 ° C. to transfer the pattern layer, and then a transparent top coat layer for protecting this pattern layer is formed. And

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example of a cross-sectional structure of the transfer sheet. In order to improve the transferability and adhesion of the pattern layer at the time of transfer heat and pressure, the sealer layer is formed by sequentially providing the base sheet 1 of the transfer sheet, the pattern layer 2 that is releasably provided, and the sealer layer 3. Contains a functional group that reacts with the polyisocyanate resin.

As the base sheet 1 of the transfer sheet, a polyethylene terephthalate resin film, a PP laminated paper, a polyvinyl chloride resin film or the like is used, and it may be appropriately selected depending on the degree of surface unevenness of the decorative board base material and the transfer conditions. Good.

The optional pattern layer 2 is formed by normal gravure printing,
It is printed by a method such as screen printing. The binder of the ink used is determined in consideration of the durability of the final product. Further, in order to obtain the releasability of the pattern layer, it is possible to provide the transfer sheet with a release layer or a release layer.

As shown in FIG. 2, the transfer sheet 6 is placed so that the sealer layer side is in contact with the decorative plate substrate 5 provided with the base coat layer 4.
Is placed and thermocompression-bonded using a heated elastic roll 7, and then the base sheet 1 of the transfer sheet is peeled off, and the pattern layer 3 is transferred. For the base coat, an isocyanate-curable enamel resin may be used, and the coloring may be selected in harmony with the pattern layer after transfer.

As the decorative board base material 5, plywood, slate board, asbestos cement board, calcium silicate board, magnesium silicate board, wood chip cement board and the like can be used.

The elastic roll 7 need not be a roll, and silicon is mainly used as the material, but neoprene and SBR can also be used, and a plastic body can also be used. is there.

By a series of these operations, a decorative plate having an extremely high design can be obtained. In addition, it is preferable to apply a clear coating from above for surface protection.

[0016]

According to the present invention, the transfer sheet is provided with a sealer layer containing a functional group capable of reacting with a polyisocyanate resin, and a resin of the same type as the sealer layer is provided as a base coat of the base material, so that the surface temperature transferred is reduced. Even when the temperature is lower than the temperature of the elastic roll that has been heated initially, a high initial adhesion of the pattern layer can be obtained at the time of transfer, and the transfer speed can be increased while maintaining the transferability and the adhesion.

[0017]

The present invention will be described in detail with reference to the following examples.
The transfer sheet was obtained by printing 50 g / m ² PP laminated paper with an ink having a releasable acrylic resin as a binder, and then printing a transparent acrylic polyol resin as a sealer layer by a gravure method.

A slate plate having a flat surface was used as the decorative plate substrate, and the surface was dust-removed and sealed. A white colored isocyanate-curable urethane resin enamel base coat, to which titanium oxide was added as a pigment, was applied by air spray to 80 g / m ² , and 8
Dry in an oven at 0 ° C for 5 minutes. The polyol component of the base coat was the same as the resin used for the sealer layer of the transfer sheet.

Next, in synchronization with the decorative board base material,
The transfer sheet was placed and transferred using a roll formed of silicon having a surface hardness of 40 degrees heated to 150 ° C. Transfer speed is 10m / min, pressure is 20kg / cm
And After peeling off the base sheet of the transfer sheet, an acrylic urethane resin-based top coat was applied as a protective layer on the surface by air spray. The coating amount was 120 g / m ^2, and the coating was dried in an oven at 80 ° C. for 15 minutes.

The decorative boards thus obtained were all highly designable. In addition, the durability such as heat cycle resistance, water resistance, warm water resistance, and weather resistance was superior to that of a decorative sheet prepared using a transfer sheet having no sealer layer that reacts with a polyisocyanate resin.

[0021]

As described above, according to the present invention, a transfer sheet is provided with a sealer layer containing a functional group capable of reacting with a polyisocyanate resin, and the same kind of resin as the sealer layer is used as a base coat of a substrate. At the same time, a high initial adhesion of the pattern layer can be obtained, and the transfer speed can be increased while maintaining the transferability and the adhesion. Also,
The high adhesiveness improves the durability of the decorative board. As described above, excellent effects such as obtaining a decorative plate having a high transfer rate, high durability, and efficiently providing a design with high designability can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a cross-sectional structure of a transfer sheet of the present invention.

FIG. 2 is an explanatory view showing a state in which a transfer sheet of the present invention is used for transfer to a decorative plate base material by thermocompression bonding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base sheet of transfer sheet 2 ... Design layer 3 ... Sealer layer 4 ... Base coat layer 5 ... Decorative board substrate 6 ... Transfer sheet 7 ... Transfer roll

Claims (3)

[Claims] 1. A transfer sheet in which a pattern layer is releasably provided on a base sheet and a sealer layer is further provided, wherein the sealer layer contains a functional group that reacts with a polyisocyanate-curable resin. . 2. A decorative sheet substrate provided with a polyisocyanate-curable enamel resin base coat having the same resin system as that of the sealer layer of a transfer sheet provided with a pattern layer releasably provided on a base sheet and further provided with a sealer layer. A decorative board comprising a top coat layer, which is placed on the surface so that the sealer layer of the transfer sheet is in contact therewith to transfer a pattern layer and protects the pattern layer. 3. A decorative sheet obtained by applying a polyisocyanate-curable enamel resin base coat having the same resin system as the sealer layer of a transfer sheet provided with a pattern layer releasably provided on a base sheet and further having a sealer layer. The transfer sheet is placed on the surface of the base material so that the sealer layer is in contact with the base material, and the surface of the base material is thermocompressed by an elastic body to transfer the design layer, and then a transparent top coat layer is formed to protect the design layer. A method for manufacturing a decorative board, comprising: