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公开(公告)号：US20200164546A1
公开(公告)日：2020-05-28
申请号：US16066320
申请日：2016-12-21
Applicant: Arkema Inc.
Inventor： Angelo PEDICINI , Bruce CLAY , Benoit BRULE
Abstract: The present disclosure is directed to improved poly(arylene ether ketone) powders for use in laser sintering.
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公开(公告)号：US20210283804A1
公开(公告)日：2021-09-16
申请号：US17258464
申请日：2019-07-09
Applicant: Arkema Inc.
Inventor： Denis HUZE , Benoit BRULE , Nadine DECRAEMER , Jerome PASCAL , Bruce CLAY
Abstract: A method and apparatus for heat treating powders of semi-crystalline or crystallizable polymers. The apparatus includes a heating device for heating the powder to a temperature that is less than the melting temperature of a highest melting crystalline form of the powder, a vessel containing the powder that is exposed to heat produced by the heating device, and a mechanism for moving the vessel to cause the powder within the vessel to move with respect to the vessel.
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公开(公告)号：US20200276760A1
公开(公告)日：2020-09-03
申请号：US16646192
申请日：2018-09-14
Applicant: Arkema Inc.
Inventor： Timothy A. SPAHR , Bruce CLAY , David S. LIU , Julien JOUANNEAU
IPC: B29C64/30 , B29C64/118 , B33Y10/00 , B33Y40/20 , B33Y70/00
Abstract: The present invention is directed to material extrusion additive manufacturing processes, including fused filament fabrication, used to manufacture improved parts, devices, and prototypes using polyetherketoneketones (“PEKK”) and polyetheretherketones (“PEEK”). Using the improved processes of the invention, PEKK or PEEK polymer readily is 3D printed by FFF such that it crystallizes slowly enough during deposition for the resulting part to remain mostly or substantially amorphous during printing and thus have low percentage and/or more uniform shrinkage per layer and little to no warping from the base during print, and yet fast enough so that the resulting part crystallizes in post-print processing without substantial or any loss of its printed structure.
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