Process for the manufacture of a plastic web by coating
AssigneeGerflor
InventorsPaul Plusquellec, Jacques Verhulst, Jean-Luc Perillon
Life of this patent
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Abstract
Disclosed is a process for the manufacture, by coating, of a plastic web. A plastisol is deposited as a layer onto a flat support, to obtain a coating layer in the pasty state. Before the plastisol is gelled, powdering is performed by accelerating particles of plastic powder toward, the external surface of the coating layer. The powder includes particles of a thermoplastic material capable of at least partially being integrated into or dissolving in the plastisol. The particles are homogeneously incorporated in order to form a single matrix with the thermoplastic base material of the plastisol.
Claims15
A process for the manufacture, by coating, of a plastic web including at least one coating layer comprising a substrate made up of at least one thermoplastic base material, the process comprising the following stages:
- (a) obtaining a plastisol in a pasty state, said plastisol comprising the substrate in divided form and a plasticizing agent;
- (b) depositing the plastisol as a layer onto a flat support to obtain a coating layer in a pasty state;
- (c) powdering the coating layer in the pasty state by distributing and voluntarily accelerating toward the external surface of the coating layer particles of at least one thermoplastic material, so that said particles are incorporated homogeneously in at least one, top or back, surface layer of said coating layer;
- (d) gelling the coating layer with the incorporated particles to obtain the coating layer in a solid state, said particles of said at least one thermoplastic material being capable after their incorporation according to stage c) of at least partially being integrated into or dissolving in the substrate of the plastisol at the end of this gelling stage;
- and
- wherein during stage a) the plastisol is overplasticized whereas during stage c) the plastisol is deplasticized by the incorporation of the at least one thermoplastic material, whereby the overall quantity of the plasticizing agent in the gelled coating layer remains below about 30 phr of the thermoplastic base material.
Dependencies are inferred from the claim text.