Txheej txheem cej luam
Polyglycolic acid (PGA) yog cov khoom siv polyester polymer nrog cov pa roj carbon tsawg tshaj plaws, melting point 220-224, iav hloov kub ntawm 35-40. Nws muaj biocompatibility zoo thiab biodegradability thiab tuaj yeem degraded hauv lub cev los ntawm hydrolysis, tsim glycolic acid, thiab tom qab ntawd ntxiv degraded hauv lub cev mus rau hauv dej thiab carbon dioxide, thiab lwm yam. Yog li ntawd, nws tau txais kev pom zoo los ntawm US Food and Drug Administration (FDA) rau siv nyob rau hauv tib neeg cog thiab certified raws li ib tug zoo biodegradable yas nyob rau hauv Teb chaws Europe, Nyiv thiab US.
PGA yog dav siv hauv siab -tus nqi- ntxiv cov khoom xws li kev kho mob absorbable phais sutures. PGA kuj muaj cov roj ua haujlwm zoo thiab lub zog txhua yam, thiab nws kuj yog siv rau hauv cov pa roj - thaiv cov khoom ntim thiab cov roj av - cov pob tawg.
Ethyl ester npaj technology
Glycolic acid (ester) tau siv los ua raw khoom los npaj glycolic ester los ntawm txoj kev ntawm "pre-polymerization depolymerization-refining".
◆ txheej txheem Depolymerization: zoo txo cov coking tus nqi ntawm cov tshuaj tiv thaiv kab mob ntawm qhov kub thiab txias.
◆ Refining process: ethyl ester product purity is high (>99.5%), mus txog qib polymerization.
◆ Los ntawm cov txheej txheem pwm, tau txais kev tsim nyog ethyl ester.
PGA npaj thiab kev siv tshuab
◆ Nruam polymerization: Piv nrog cov tsoos batch kettle polymerization, lub sij hawm polymerization yuav raug txo los ntawm ob peb teev mus rau tsawg dua 15 feeb.
◆ The intrinsic viscosity of PGA is >1.0dL / g, qhov seem yog<1wt% and the mechanical properties are comparable to those of imported products.
◆ Tag nrho cov txheej txheem ntawm PGA yaj- cov txheej txheem spinning tau ua tiav thiab tau txais PGA filament.
Popularization thiab Daim Ntawv Thov
Tam sim no, cov txheej txheem kev tsav tsheb tau tsim thiab cov kev phais phais tau ua tiav tiav.
Cim npe nrov: Tuam Tshoj ethyl ester thiab pga tshuab manufacturers, lwm tus neeg, Hoobkas