Method for making ground coatings
The invention relates to a method for making a ground coating made of a thermoplastic material, that comprises the steps of (a) depositing a layer of a liquid component on a substrate, the liquid component being selected from a plastisol, an organosol or an SBR rubber emulsion, (b) powdering solid particles on the liquid component layer, and (c) applying press heat in order to form a ground coating having a smooth surface. The invention also relates to a device for obtaining such coatings.
1. A process for manufacturing a thermoplastic floor covering comprising the following steps:
(a) depositing a layer of a liquid component onto a support, the liquid component comprising a plastisol, an organosol or an emulsion of SBR rubber;
(b) sprinkling solid particles onto the layer of liquid component; and
(c) applying pressure and heat between a lower conveyor belt and an upper conveyor belt to form a floor covering that has a smooth surface, the pressure being limited to between 0.1 and 5 bar; and
(d) a pregelling step between the step (b) of sprinkling particles onto the layer of liquid component and the step (c) of applying pressure and heat.
2. The process as claimed in claim 1 , in which the support is removable from the floor covering.
3. The process as claimed in claim 1 , in which the support is part of the floor covering and comprises a calendered sublayer, a textile or a nonwoven fabric or glass web.
4. The process as claimed in claim 1 , in which the layer of liquid component has a thickness between 0.5 mm and 3 mm.
5. The process as claimed in claim 1 , in which the solid particles comprise plastic, inorganic or metallic materials or mixtures thereof.