Thermoplastic polymer powder having a large particle size distribution
AssigneeArkema France
InventorsDenis HUZE, Alexis MORFIN
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Abstract
The invention relates to a thermoplastic polymer powder having a Hausner ratio of less than or equal to 1.30 and comprising particles having a particle size distribution characterized by a span of greater than or equal to 1.0. The invention also relates to the use of such a powder for constructing a three-dimensional article, for coating a surface and for manufacturing an article by rotational molding. The invention also relates to a process for preparing a thermoplastic polymer powder, and also to a process for encapsulating thermoplastic polymer particles with at least one additive.
Claims20
A thermoplastic polymer powder having a Hausner ratio of less than or equal to 1.30 and comprising particles having a particle size distribution characterized by a span of greater than or equal to 1.0.
A process for preparing a thermoplastic polymer powder, comprising the following steps:
- a) providing a thermoplastic polymer powder;
- b) heating said powder by means of an energy source with a temperature of from 600 to 10,000° C.;
- c) optionally, spraying the powder;
- d) cooling the powder;
- and
- e) collecting the powder.
A process for encapsulating thermoplastic polymer particles with at least one additive, comprising the following steps:
- a) providing thermoplastic polymer particles;
- b) mixing the thermoplastic polymer particles with at least one additive chosen from the group consisting of flow agents, mineral fillers, fibers, polymer powders, dyes, pigments, fireproofing additives, antioxygen stabilizers, light stabilizers, impact modifiers, antistatic agents, flame retardants, and mixtures thereof, so as to form a thermoplastic polymer powder;
- c) heating said powder by means of an energy source with a temperature of from 600 to 10,000° C.;
- d) spraying the powder, where appropriate;
- e) cooling the powder;
- and
- f) collecting the powder.
Dependencies are inferred from the claim text.