公开(公告)号：US10722388B2

公开(公告)日：2020-07-28

申请号：US15716620

申请日：2017-09-27

申请人： KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

发明人： Soo Hyun Kim ,  Young Mee Jung ,  Seung Hyuk Im

IPC分类号： A61F2/91 ,  A61L31/06 ,  A61L31/14 ,  A61L17/10 ,  A61L17/14 ,  D02J1/22 ,  A61F2/88 ,  B29C71/02

摘要： A solid-state drawing method for preparing a surgical suture or a biodegradable stent having improved flexibility and mechanical strength. The method for preparing a biodegradable stent includes (a) providing a biodegradable filament that comprises a material which is biodegradable; (b) solid-state drawing the biodegradable filament to provide a drawn biodegradable filament; (c) shaping the drawn biodegradable filament to provide a shaped biodegradable filament; and (d) annealing the shaped biodegradable filament to provide the biodegradable stent, wherein the biodegradable filament has a draw ratio that ranges from 1.1 to 5.0; and wherein the draw ratio is calculated by Equation 1 below: Draw ratio=(LSSD/LO)2, where LO is length of the biodegradable filament before the solid-state drawing, and LSSD is the length of the biodegradable filament after the solid-state drawing.

公开(公告)号：US10287392B2

公开(公告)日：2019-05-14

申请号：US15717212

申请日：2017-09-27

申请人： KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

发明人： Soo Hyun Kim ,  Young Mee Jung ,  Seung Hyuk Im

IPC分类号： C08G63/08 ,  C08G63/664 ,  G01N25/48

摘要： Disclosed is a method for preparing a poly(L-lactic acid) composite. According to the method, PLLA can be processed without losing its physical properties during thermal processing and can be effectively used to manufacture a final product with improved thermal properties. In addition, the monomer is not thermally decomposed during high-temperature polymerization. Therefore, the poly(L-lactic acid) composite can be prevented from browning. Also disclosed is a poly(L-lactic acid) composite prepared by the method.