Compression moulding and injection over moulding of porous PEEK components

Siddiq, A. and Kennedy, A.R. (2020) Compression moulding and injection over moulding of porous PEEK components. Journal of the Mechanical Behavior of Biomedical Materials, 111. ISSN 1751-6161

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Abstract

A simple and adaptable process for the production of porous PEEK has been demonstrated herein, which uses compression moulding to infiltrate molten PEEK into of a packed bed of salt beads. The process has the capacity to vary the pore size and porosity within the range suitable for materials to replace bone, but compressive testing showed the stiffness to be well below the target to match trabecular bone. This issue was addressed by creating a hybrid structure, integrating “pillars” of solid PEEK into the porous structure, by the injection over-moulding of compression moulded PEEK-salt inserts that contained drilled holes. Good bonding between the moulding and the insert was demonstrated and it was found that as little as 35 mm2 of support, in the form of PEEK “pillars” was required to achieve the target performance.

Item Type:
Journal Article
Journal or Publication Title:
Journal of the Mechanical Behavior of Biomedical Materials
Additional Information:
This is the author’s version of a work that was accepted for publication in Journal of the Mechanical Behavior of Biomedical Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of the Mechanical Behavior of Biomedical Materials, 111, 2020 DOI: 10.1016/j.jmbbm.2020.103996
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2211
Subjects:
ID Code:
146974
Deposited By:
Deposited On:
01 Sep 2020 10:50
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Sep 2020 05:42