Hais txog PLA
PLA, tseem hu ua polylactide, yog polyester polymerized los ntawm lactic acid.Polylactic acid muaj biodegradability zoo heev, compatibility thiab nqus.Nws yog non-toxic, non-rritating hluavtaws polymer khoom.Nws cov khoom siv raw yog lactic acid, uas feem ntau yog los ntawm fermentation ntawm starch, xws li pob kws thiab mov.Nws tseem tuaj yeem tau txais los ntawm cellulose, khib nyiab hauv chav ua noj lossis ntses pov tseg.
PLA muaj ntau yam khoom siv raw, thiab cov khoom tsim los ntawm nws tuaj yeem ncaj qha composted lossis incinerated, uas tuaj yeem ua tau raws li cov kev xav tau ntawm kev txhim kho kom ruaj khov.Cov pob tshab zoo thiab qee qhov toughness, biocompatibility thiab kub tsis kam ntawm PLA yog qhov laj thawj tseem ceeb rau nws daim ntawv thov dav.
Tsis tas li ntawd, PLA muaj cov thermoplasticity thiab tuaj yeem siv rau ntau qhov chaw, xws li cov khoom ntim, fibers, thiab lwm yam.. Nws yog siv rau cov khoom siv pov tseg xws li cov ntaub ntawv pov tseg thiab cov khoom ntim, nrog rau cov khoom siv hluav taws xob thiab kev kho mob.
Piv nrog rau cov khoom siv petrochemical, kev siv hluav taws xob hauv kev tsim cov tshuaj polylactic acid tsuas yog 20% mus rau 50% ntawm cov khoom siv petrochemical, thiab carbon dioxide tsim tsuas yog 50% ntawm cov khoom siv petrochemical.Yog li ntawd, txoj kev loj hlob ntawm polylactic acid degradable cov ntaub ntawv yog tsim nyog los alleviate ntiaj teb no ib puag ncig thiab lub zog teeb meem.
Cov yam ntxwv ntawm PLA
1. Biodegradability
Piv nrog rau cov yas yas, polylactic acid tuaj yeem degraded rau hauv CO2 thiab H2O los ntawm cov kab mob thiab lub teeb.Nws cov khoom degradation yog non-toxic thiab harmless, thiab yuav tsis ua phem rau ib puag ncig.Lub monomer rau tsim polylactic acid yog lactic acid, uas tuaj yeem fermented los ntawm cov qoob loo xws li nplej, nplej thiab qab zib beet los yog ua liaj ua teb by-products.Yog li ntawd, cov khoom siv raw rau kev tsim polylactic acid yog txuas ntxiv mus.Polylactic acid ua cov khoom siv biodegradable yog dav siv.
2. Biocompatibility thiab Absorbability
Polylactic acid tuaj yeem hydrolyzed los ntawm acid lossis enzyme los tsim lactic acid hauv tib neeg lub cev.Raws li cov metabolite ntawm cov hlwb, lactic acid tuaj yeem ua ntxiv los ntawm cov enzymes hauv lub cev, tsim CO2 thiab H2O.Yog li ntawd, polylactic acid yog non-toxic thiab harmless rau tib neeg lub cev, ntxiv rau nws muaj zoo biocompatibility thiab bioabsorbability.Polylactic acid tau ntawv pov thawj los ntawm US Food and Drug Administration uas tuaj yeem siv los ua biomaterial rau cog rau tib neeg
3. Lub cev machinable
Raws li cov khoom siv thermoplastic polymer, polylactic acid muaj cov yas zoo thiab lub cev ua haujlwm, nrog rau cov ntsiab lus siab melting thiab crystallinity, zoo elasticity thiab flexibilit, thiab zoo heev thermoformability.Polylactic acid cov ntaub ntawv, zoo li cov ntaub ntawv polymer xws li polypropylene (PP), polystyrene (PS), thiab polyphenylene ether resin (PPO), tuaj yeem ua los ntawm extrusion, stretching, thiab txhaj tshuaj molding.
Post lub sij hawm: Aug-18-2023
