Synthesis and degeneration Absorbtion medical will be membrane be as forgather lactic acid for ingredient by special craft process but become. Forgathers lactic acid is a kind of performance fit, Possess fit biology consist with sex and biology can degrade sexual polymer, Forgathers lactic acid ( PLA) Innocuity, Has not excitant, Intension high, Easily elaboration molding. Course degeneration in organism, Can finally analyse become water and carbon dioxide, Can not bring forth harmful substance 's assemble in body, PLA 's degrade and degradation product's height safety already get confirm in human body, Meanwhile was thought was most have develop foreground's medical macromolecule material. 　　 Forgathers lactic acid ( PLA) Is as maize, Wheat, Wood will be withdraw 's amylum for ingredient some plants in, Passes through enzyme analyse get dextrose, Repasses lactobacillus ferment change for lactic acid, Then course chemical synthesis gets high-purity 's PLA, Ordinary PLA 's synthesizes means can divide into direct condensation polymerization law with indirect condensation polymerization law two kinds of, We pass the third hand in ester open ring aggregate make forgather lactic acid ( PLA) , Thats be first of all hand in dehydration between lactic acid molecule, Comes into being ring 's the third hand in ester; Then will the third hand in ester open ring aggregate come into being high polymer. This kind of reacts craft can synthesize molecular weight high reach ( 7-10) × 105 's PLA. 　　 Absorbtion medical membrane at implant body in behind from membranous surface start degeneration, Molecular weight gradually reduces, Degrades become big flinders, Again by big flinders degrade become small flinders, Finally complete degrades is small molecular weight 's DL lactic acid. We according to air frame fibrin effuse feature come design glue gram 's degrade time behind operation, Membrane at implants behind start degeneration in body, Environment time alsoes possess compare integral membranous structure, Environment after accelerates degeneration, Seven week time naked eye observe have little membranous trace, Twelve week degrades finish. Membranous degrades velocity, Mechanical robustness chief technology target is by to molecular weight 's control, Copolymerizations body 's organization and match than get regulating, On the other hand degrades speed with patient's metabolic, Implants part 's supply blood wait for factor have certain relation.
Develops background Product characteristic Product summary Prevents adhesion principle Biology safety valuation Synthesis and degeneration Animal experiment Clinic verification Relatives to information

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