Process for densification of poly(arylene ether ketone) powders
AssigneeArkema France
InventorsBenoit Brule, Denis Huze, Nadine Decraemer, Jerome Pascal
Life of this patent
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Abstract
Process for densification of a poly(arylene ether ketone) (PAEK) powder or of a mixture of poly(arylene ether ketone) (PAEK) powders, the process being mixing the powder or the mixture of powders, in a mixer equipped with a rotary stirrer including at least one blade, for a period of between 30 minutes and 120 minutes, preferably of between 30 and 60 minutes, at a blade-tip speed of between 30 m/s and 70 m/s, preferably of between 40 and 50 m/s.
Claims17
A process for densification of a poly(arylene ether ketone) (PAEK) powder or of a mixture of poly(arylene ether ketone) (PAEK) powders,
- the process consisting of:
- mixing the powder or the mixture of powders in a mixer equipped with a rotary stirrer comprising at least one blade, for a period of between 30 minutes and 120 minutes, at a blade-tip speed of between 30 m/s and 70 m/s to form a densified powder or mixture of powders;
- wherein during mixing, the powder or mixture of powders reaches a temperature below the glass transition temperature of the powder or below the lowest glass transition temperature among the powders in the mixture and
- wherein the densified powder or mixture of powders achieves a gain in tapped density which is greater than 20% compared with the powder or mixture of powders before densification.
A process for densification of a poly(arylene ether ketone) (PAEK) powder or of a mixture of poly(arylene ether ketone) (PAEK) powders,
- the process consisting of mixing the powder or the mixture of powders to form a densified powder or mixture of powders,
- wherein during mixing, the powder or mixture of powders reaches a temperature below the glass transition temperature of the powder or below the lowest glass transition temperature among the powders in the mixture, and
- wherein the densified powder or mixture of powders achieve a gain in tapped density which is greater than 20% compared with the powder or mixture of powders before densification.
Dependencies are inferred from the claim text.