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Laser Welding of Nonwoven Polyglycolic Acid (PGA) Scaffold

Author(s)/Editor(s): Shuting Lei PhD

Pages in Print Edition: 9PP

Published: 07/01/2011
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This paper presents an experimental study on laser-welding of synthetic biodegradable polyglycolic acid (PGA) scaffold for applications in biomedical/tissue engineering. An experimental setup for laser spot welding is built that uses a spherical lens to focus the beam and apply pressure at the welding zone. A factorial design of experiments is used to study the effects of the operating parameters such as laser power, beam diameter, heating time and contact pressure on weld quality. The weld quality is assessed in terms of weld area, weld strength, and discoloration. The successful welds obtained by the laser welding process have no discoloration and are stronger than the tensile strength of the original nonwoven sheets of PGA scaffold. Published in the Proceedings of NAMRI/SME, Vol. 39, 2011.