Method of grinding polyaryletherketones
AssigneeArkema France
InventorsCyrille Mathieu, Karine Huraux
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Abstract
An improved method of grinding polyaryletherketones, providing very good yields and the production of powders of polyaryletherketones with an average diameter below 100 μm having a narrow size distribution with few fine particles (Dv10>15 μm). Method of grinding polyaryletherketones of apparent density below 0.9 carried out in a temperature range between 0° C. and the glass transition temperature of the polymer measured by DSC, in order to obtain powders having a particle size distribution (diameters by volume) of d10>15 μm, 50<d50<70 μm, 120<d90<180 μm.
Claims20
A method of obtaining a powder of a polyaryletherketone, comprising carrying out grinding of a polyaryletherketone of tapped apparent density, measured on a STAV 2003 jolting volumeter equipped with a 250 ml test specimen after 2500 impulses, below 0.4 kg/I to a powder, wherein the grinding is carried out at a temperature above 0° C., with a yield of at least 48%, wherein the powder obtained from said grinding has a particle size distribution (diameters by volume) with d10>15 μm and 50<d50≤81 μm.
Dependencies are inferred from the claim text.