Decorative sheet and decorative plate
A decorative sheet and thermoplastic resin technology, which is applied in the direction of decorations, decorative arts, and techniques for producing decorative surface effects, etc., can solve the problem of decreased clarity of decorative sheet patterns, coloring, and damage to the transparency of the flame retardant layer, etc. problem, to achieve the effect of clear and visible pattern, high definition and excellent flame retardancy
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Embodiment 1
[0184] (manufacturing of decorative sheets)
[0185] As a substrate sheet, a 60 μm thick opaque colored polypropylene film was prepared. Next, after performing corona discharge treatment on both surfaces of the substrate sheet, a primer layer (thickness 2 μm) of two-liquid curing polyurethane resin was formed on the back surface of the substrate sheet, and the surface of the substrate sheet was coated by gravure printing. On the front side, a patterned layer is formed with curable printing ink containing acrylic urethane resin. Further, an adhesive of a two-component curing polyurethane resin was applied on the patterned layer to form a transparent adhesive layer. Then, on the adhesive layer, a transparent polypropylene resin containing a phosphinic acid metal salt flame retardant shown below is heated and melted and extruded using a T-die extruder to form a thermoplastic transparent resin layer (thickness 100 μm) ).
[0186] · Transparent polypropylene resin: 100 parts by ...
Embodiment 2
[0200] A decorative sheet and a decorative board were produced in the same manner as in Example 1 except that the content of the phosphinic acid metal salt-based flame retardant in the transparent resin layer was 5 parts by mass. The content of the phosphinic acid metal salt-based flame retardant was 3.0% by mass when the total of the mass of the transparent resin layer and the base sheet was 100% by mass.
Embodiment 3
[0202] A decorative sheet and a decorative board were produced in the same manner as in Example 1 except that the content of the phosphinic acid metal salt-based flame retardant in the transparent resin layer was 30 parts by mass. When the total mass of the transparent resin layer and the base material sheet was 100% by mass, the content of the phosphinic acid metal salt-based flame retardant was 14.4% by mass.
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Abstract
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