Biodegradable PLA Monofilament xov paj
Polylactic acid fiber yog ib qho biodegradable hluavtaws fiber ntau, uas tuaj yeem tau txais los ntawm cov nplej. Tom qab nws cov khoom raug muab pov tseg, lawv tuaj yeem decomposed rau hauv carbon dioxide thiab dej los ntawm cov kab mob hauv cov av lossis dej hiav txwv. Thaum hlawv, lawv yuav tsis tawm cov pa phem thiab yuav tsis ua rau muaj kuab paug. Nws yog ib qho ruaj khov ecological fiber.
Lactic acid, raw khoom rau zus tau tej cov polylactic acid fiber (PLA), yog tsim los ntawm pob kws starch, yog li no fiber kuj hu ua pob kws fiber. Nws yog ib qho khoom siv ntuj tsim hauv cov kab mob (xws li tib neeg lub cev). Qhov hnyav molecular polylactic acid tuaj yeem tau txais los ntawm cov tshuaj polymerization ntawm lactic acid cyclized dimer lossis ncaj qha polymerization ntawm lactic acid. Cov khoom tau los ntawm polylactic acid raws li raw cov ntaub ntawv muaj zoo biocompatibility thiab bioabsorbability, nrog rau zoo biodegradability, dej nqus, bacteriostasis, nplaim retardancy, thiab PLA yog nyob rau hauv lub degradable thermoplastic siab cov ntaub ntawv uas muaj qhov zoo tshaj plaws tshav kub kuj.
Polylactic acid (H-[OCHCH3CO]n-OH) muaj qhov zoo thermal stability, ua haujlwm kub 170-230 degree, hnyav hnyav, thiab tuaj yeem ua tiav ntau txoj hauv kev, xws li extrusion, spinning, biaxial stretching, txhaj tshuaj molding .
Ntxiv nrog rau kev ua biodegradable, cov khoom ua los ntawm polylactic acid muaj biocompatibility zoo, gloss, pob tshab, tes xav thiab kub tsis kam.
Cov ntaub yuav siv tau rau papermaking, phais xaws xov, lim khoom thiab conveyor siv. Txoj kab uas hla ntawm monofilament yog {{0}}}{{10}}}5 ~ 1.0 hli, qhov melting point yog 200 ~ 235 degree , thiab lub zog (JIS L1013, 1999-8.5) ntau dua lossis sib npaug rau 3.0 cN/dtex. Piv txwv li, cov fiber uas muaj 40 feem pua poly (L-lactic acid) thiab 60 feem pua poly (D-lactic acid) yog stretched nyob rau hauv ob kauj ruam ntawm 100 degree 4 zaug thiab 190 degree ob zaug, kev kho cua sov, thiab 200 degree 0.9 zaug stretch mus rau tau txais polylactic acid monomer. Silk. Monofilament txoj kab uas hla yog 0.4 hli, melting point yog 227 degree, lub zog yog 4.2 cN / dtex, boiling dej shrinkage tus nqi (JIS L 1013) 3.0 feem pua
Lub cev muaj zog: ntom: 1.20-1.30 kg/L
Melting point: 155-185 degree ,
Intrinsic viscosity IV: 0 2-8 dL/g
iav hloov kub: 60-65 degree ,
Kub hloov pauv coefficient: 0.025 λ(w/m*k)
Mechanical zog: tensile zog: 40-60 MPa
Elongation thaum so: 4 feem pua -10 feem pua
Elastic modulus: 3000-4000 MPa
Flexural modulus: 100-150 MPa
Izod cuam tshuam lub zog (tsis suav): 150-300 J/m
Izod cuam tshuam lub zog (notched): 20-60 J/m
Rockwell hardness: 88
