JPH0321451A - Decorative sheet for exterior decoration having flow pattern - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a decorative sheet for exterior use having a highly designed surface.

[Conventional technology]

Conventionally, decoration on exterior base materials has generally been applied by spraying paint. However, since most paint spraying is done on-site, there are problems such as the timing of the work has to be timed to match the progress of the work on-site, the work takes a long time, and there are also problems such as uneven application and difficulty in creating a high-quality design. There were drawbacks.

Recently, adhesive sheet-type decorative materials with a protective layer with excellent weather resistance have also been developed; for example, in JP-A-63-1253
See No. 32. However, this decorative material has a single white color layer and is not highly designed.

Also, attempts have been made to create a sophisticated design by printing on the water-based elastic paint layer. Although excellent patterns can be obtained using this method, inks and printing methods suitable for printing on water-based elastic paint layers have not yet been established.

[Problem to be solved by the invention]

An object of the present invention is to obtain a decorative sheet for exterior use having a highly designed surface that eliminates the above-mentioned drawbacks of conventional decorative sheets for exterior use.

[Means to solve the problem]

The present invention was obtained as a result of studies in view of the above circumstances.

That is, the present invention relates to a decorative sheet for exterior use having a highly designed surface with a beautiful flowing pattern formed by a fibrous sheet support layer, a paint layer in which a plurality of paints of different colors form a flowing pattern, and a surface protective layer. It is.

One of the features of the present invention is to provide an exterior decorative sheet in which a flowing pattern is formed by coating a plurality of paints of different colors in arbitrary proportions.

The layer structure of the exterior decorative sheet of the present invention or the sheet support layer (
1) Flow pattern paint layer on one surface (2) Surface protective layer (3)
are sequentially applied, and adhesive N (4) is applied to the other surfaces of the sheet support layer ( ). It is set up at will.

In forming the flow pattern paint layer (2) of the present invention, coating can be performed using a common comma doctor coater. In this case, a plurality of types of paints with different colors are injected from each paint storage container into a paint supply tank to the coater immediately before being applied to the sheet support layer (1), and then in this storage tank. Supply to the comma doctor coater while stirring gently.

Multiple paints are mixed by gentle agitation in the storage tank, creating a flowing pattern, and the coater coats the paint in a flowing pattern. Since the shape of this flow pattern is influenced by various factors such as the stirring speed in the storage tank, the viscosity of the paint, the amount of paint flowing in, and the flow rate, subtle changes in the flow pattern can be obtained. Further, by adjusting the color of the paint, a high degree of design can be obtained.

Various other techniques can be employed, as the flow pattern can be formed by avoiding uniform and complete mixing of a plurality of paints.

For example, a plurality of paints of different colors are supplied to the surface of the sheet support layer immediately in front of the doctor blade, and the paint is applied using the force of the movement of Sea 1 and the support layer in the paint portion temporarily stored by the blade on the surface of the sheet support layer. A method of creating a flowing pattern by mixing parts of the paint.

A method in which a plurality of paints of different colors are supplied to the surface of a sheet support layer immediately before a doctor blade, and then some of the paints are mixed by moving or rotating the blade to form a flow pattern.

Furthermore, by appropriately selecting the number of blades and the installation location, and by changing the shape of the blades, it is possible to change the mixing mode of the paint and form a flowing pattern.

It is also possible to use a roll coater instead of a blade.

The coating thickness of the paint is preferably about 150 to 500 μm in order to give a high design feel when forming the uneven pattern.

Next, materials used in the present invention will be explained.

As the structural material for the fibrous sheet support layer (1) of the present invention, synthetic fibers such as glass fibers, vinylon fibers, and acrylic fibers are preferred from the viewpoint of durability, but cellulose fibers can also be used. The sheet may be in the form of woven fabric, non-woven fabric, or the like. Note that paper is also included in the term nonwoven fabric here.

Also, when forming a paint layer with a flow pattern, it is preferable to use a nonwoven fabric with appropriate air permeability as the support layer in order to improve adhesion through the impregnation effect. However, other materials such as woven fabrics can also be used.

The paint used to form the flow pattern paint layer is preferably an acrylic water-based elastic emulsion from the viewpoints of durability, water absorption, and processability. At this time, in order to impart a certain degree of flexibility to the layer, improvements such as using a copolymer of acrylic and styrene as the emulsion resin may be carried out. In addition, from the viewpoint of processing suitability, the
/ It is preferable to form a film under drying conditions of 3 to 5 minutes.

The pigments contained in the emulsion are generally TiO■, S
Although white pigments such as b203 and ZnO and extender pigments such as CaCO are mainly used, emulsions of any color can be obtained by replacing some or all of these pigments with various inorganic pigments. As a usable pigment with good weather resistance,
Examples of yellow pigments include organic pigments such as isoindolinone, Suren Yellow G, and Permanent Yellow HR, and inorganic pigments such as yellow iron oxide and nickel titanium yellow.

Red pigments include organic pigments such as Quinacridone Red, Permanent Red FOR, and Permanent Red F4RH, and inorganic pigments such as Bengara and mercury cadmium sulfide.

Examples of blue pigments include organic pigments such as phthalocyanine blue and Thren Blue RS, and inorganic pigments such as Gunsei and Prussian blue.

As a black pigment, carbon black etc.

Examples of white pigments include titanium dioxide and antimony dioxide.

At this time, any color can be obtained by adjusting the color using pigments of each color as in the case of ordinary ink. The pigment used has a particle size of 0.1 to 1.0 μm and a heat resistance of 150"C or more,
It is preferable to use one that has a suitable degree of scrofulous decomposition.

The surface protective layer is provided for the purpose of protecting the flow pattern paint layer from the outside world, and is therefore selected from weather-resistant resins. Acrylic resins or fluororesins are most suitable for this purpose. At this time, it is important to use a material that is flexible enough to prevent peeling or cracking. Examples of usable resins include polyfluoroethylene resins such as polyvinyl fluoride, polyvinylidene fluoride, poly-47 fluoroethylene, and ethylene-47 fluoroethylene copolymer. Examples of the acrylic resin include acrylic resins such as methyl polymethacrylate, ethyl polymethacrylate, ethyl polyacrylate, and butyl polyacrylate, or mixtures of these polyfluoroethylene resins and acrylic resins. Laminated products made by polymer alloy, coextrusion, coating, heat fusion, etc. are used. Various coatings, lamination of films or sheets, etc. can be used as the form of the surface protective layer.

As a coating method for the surface protective layer, any known method may be used, and any suitable method may be used as long as it is applicable to those methods. The coating thickness is selected from a range of about 1 to 200 μm depending on the application and performance, but in particular when weather resistance is required, a thickness of about 25 to 30 μm or more is required.

Known methods can be applied to shape the uneven pattern.

It may be carried out either before or after forming the uneven pattern or forming the surface protective layer.

Since the exterior decorative sheet of the present invention is often used by adhering onto an exterior board, an adhesive layer may be provided in advance on the back surface of the exterior decorative sheet of the present invention. As the adhesive, known heat-sensitive adhesives, pressure-sensitive adhesives, water-based adhesives, etc. can be used.

〔Example〕

An exterior decorative sheet having a paint layer shaped like a flow pattern according to the present invention was manufactured.

(Materials used) Non-woven fabric: Silvon NTP type (manufactured by Koshin Co., Ltd.) Acrylic emulsion: M4828 type (manufactured by Sunstar Giken Co., Ltd.) Coloring pigment and yellow iron oxide cobalt blue (manufactured by Dainichiseika Co., Ltd.) Fluorine paint: LF406 type (Asahi Co., Ltd.) 6) (manufactured by a subsidiary company) (flow pattern or process) The paint ([) is the above acrylic emulsion with a small amount of iron oxide added, and the paint (II) is a mixture of 10 to 10% of the titanium oxide in the above acrylic emulsion. Use iron oxide/cobalt blue pigments to replace 20% of the pigment.

Next, paints (1) and (II) were coated on the nonwoven fabric using a comma doctor coater while gently mixing and stirring, and dried at 130°C for 3 minutes to form a coating of 200μ
A coating layer of m thickness is formed.

The obtained painted nonwoven fabric was coated with fluorine-based paint using a flow coater and dried at 150°C for 2 minutes.
Form a layer of 5 μm.

Thereafter, an uneven pattern was formed using a heat dry embossing machine.

The obtained decorative sheet had a high design quality and sufficient weather resistance.

〔Effect of the invention〕

A highly designed exterior decorative sheet having a flowing pattern was obtained.

[Brief explanation of the drawing]

Figure 1 shows the exterior cosmetic sheet of the present invention. FIG. (】) Sheet support layer (2) Flow pattern paint layer (3) Surface protective layer (4) Adhesive layer Explain the structure of

Claims (1)

[Claims] 1. A decorative sheet for exterior use comprising a fibrous sheet support layer (1), a paint layer (2) in which a plurality of paints each having a different color form a flow pattern, and a surface protection layer (3). 2. The exterior decorative sheet according to claim 1, wherein the paint layer (2) is a paint layer in which a flowing pattern is formed by coating a plurality of paints of different colors while mixing them at an arbitrary ratio.