Process for producing foamed wallpapers
A technology of foam coating and base material, applied in the field of preparation of foam wallpaper
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[0054] Prepare a mixture of:
[0055]
[0056] The pigment is ground and homogenized in the dispersed phase. Adjust the pH to about 7.
[0057] The viscosity is about 3500mPas, 25°C (EN ISO2555, Brookfield viscometer).
[0058] Density is about 1.45g / cm 3 .
[0059] The resulting mixture was processed in a foam generator using air as gas to obtain a foam; ratio of coating agent to air=55:45.
[0060] A 2 mm thick layer was obtained from the foam on a sheet of paper (10x10 cm) using a doctor blade.
[0061] The resulting layer was dried in a circulating air oven at 130° C. for 30 seconds.
[0062] A paper substrate was obtained with a dry layer; the layer thickness was about 1.8 mm. The surface is non-stick and soft, and can be embossed.
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