PLA thiab PBAT

Txawm hais tias ob qho tib si yog cov khoom siv biodegradable, lawv qhov chaw sib txawv. PLA yog muab los ntawm cov khoom siv roj ntsha, thaum PKAT yog muab los ntawm cov ntaub ntawv petrochemical.

PLA cov khoom siv monomer yog lactic acid, uas feem ntau yog av los ntawm cov qoob loo xws li pob kws los rho cov hmoov txhuv nplej siab, thiab tom qab ntawd hloov mus rau hauv cov piam thaj tsis huv.

Cov piam thaj yog tom qab ntawd fermented zoo ib yam li npias lossis cawv, thiab thaum kawg cov lactic acid monomer yog purified. Lactic acid yog repolymerized los ntawm lactide rau poly (lactic acid).

BAT polyterephthalic acid - butanediol adipate, belongs rau petrochemical biodegradable yas, los ntawm kev lag luam petrochemical, lub ntsiab monomer yog terephthalic acid, butanediol, adipic acid.

Yog tias PLA yog ib tug tub huabtais hluas thiab muaj zog, ces PBAT yog ib tug poj niam sib tw liab. PLA muaj cov qauv siab, siab tensile lub zog thiab tsis zoo ductility, thaum PKAT muaj cov pob txha loj hlob thiab zoo ductility.

PLA yog zoo li PP nyob rau hauv dav yas, txhaj tshuaj molding, extrusion, tshuab moulding, blister ua tau txhua yam, PBAT yog ntau zoo li LDPE, zaj duab xis hnab ntim khoom yog zoo ntawm.

PLA yog lub teeb daj pob tshab, zoo thermal stability, ua haujlwm kub 170 ~ 230 ℃, muaj cov kuab tshuaj tiv thaiv zoo, tuaj yeem ua tiav ntau txoj hauv kev, xws li extrusion, spinning, biaxial stretching, txhaj tshuaj molding.

Zoo ib yam li PP, pob tshab zoo ib yam li PS, PLA ntshiab tsis tuaj yeem siv ncaj qha los npaj cov khoom, PLA muaj lub zog siab thiab compression modulus, tab sis nws qhov nyuaj thiab tsis zoo, tsis muaj qhov yooj thiab elasticity, yooj yim khoov deformation, cuam tshuam thiab tsim kua muag. tsis kam yog pluag.

PLA feem ntau yog siv los ua cov khoom degradable tom qab kev hloov kho, xws li cov khoom siv pov tseg thiab cov straws.

PBAT yog ib tug semi-crystalline polymer, feem ntau lub crystallization kub yog nyob ib ncig ntawm 110 ℃, thiab lub melting point yog hais txog 130 ℃, thiab qhov ceev yog nruab nrab ntawm 1.18g / mL thiab 1.3g / mL. Lub crystallinity ntawm PBAT yog kwv yees li 30%, thiab Shore hardness yog siab dua 85. Kev ua haujlwm ntawm PBAT zoo ib yam li LDPE, thiab cov txheej txheem zoo sib xws tuaj yeem siv rau cov tshuab tshuab. Cov yam ntxwv ntawm ob qho tib si PBA thiab PBT cov yam ntxwv, zoo ductility, elongation ntawm tawg, kub tsis kam thiab cuam tshuam tsis kam. Yog li ntawd, cov khoom degradation tseem yuav raug hloov kho, feem ntau yog ua kom tau raws li qhov yuav tsum tau ua ntawm cov khoom, tab sis kuj txo cov nqi.

Txawm hais tias PLA thiab PBAT muaj qhov ua tau zoo sib txawv, lawv tuaj yeem ua kom sib ntxiv! PLA ntxiv qhov tawv ntawm PBAT zaj duab xis, PBAT tuaj yeem txhim kho qhov yooj yim ntawm PLA, thiab ua kom tiav qhov kev tiv thaiv ib puag ncig.

Tam sim no, feem ntau ntawm cov ntawv thov raws li PBAT cov ntaub ntawv hauv kev ua lag luam yog cov hnab ntim khoom. PBAT cov ntaub ntawv hloov kho feem ntau yog siv los tshuab zaj duab xis los ua lub hnab, xws li lub hnab yuav khoom.

Cov ntaub ntawv PLA feem ntau yog siv rau kev txhaj tshuaj molding, thiab PLA hloov cov ntaub ntawv feem ntau yog siv rau cov khoom noj khoom haus, xws li cov thawv noj mov degradable, degradable straws, thiab lwm yam.

Rau lub sijhawm ntev, lub peev xwm ntawm PLA yog me ntsis tsawg dua li ntawm PBAT. Vim yog lub fwj loj loj ntawm PLA cov cuab yeej tsim khoom thiab tsis muaj kev sib tw hauv kev ua tiav ntawm lactide, lub peev xwm ntawm PLA hauv Suav teb tsis tau nce ntau, thiab tus nqi ntawm PLA raw cov ntaub ntawv kuj tseem kim. Tag nrho ntawm 16 PLA cov tuam txhab tau muab tso rau hauv kev tsim khoom, nyob rau hauv kev tsim kho lossis npaj yuav tsim hauv tsev thiab txawv teb chaws. Lub peev xwm ntau lawm tau muab tso rau hauv ntau lawm ntawm 400,000 tons / xyoo, feem ntau nyob rau hauv txawv teb chaws; Kev tsim kho muaj peev xwm ntawm 490,000 tons / xyoo, feem ntau hauv tsev.

Nyob rau hauv sib piv, nyob rau hauv Tuam Tshoj, raw cov ntaub ntawv rau PBAT ntau lawm yog ib qho yooj yim kom tau, thiab ntau lawm technology kuj mature. Lub peev xwm ntawm PBAT thiab lub peev xwm hauv kev tsim kho yog qhov loj. Txawm li cas los xij, qhov sib txawv ntawm lub zog tso tawm lub sijhawm ntawm PBAT tuaj yeem ncua ntev vim tus nqi hloov pauv ntawm cov khoom siv raw BDO, thiab tus nqi tam sim no ntawm PBAT tseem pheej yig dua PLA.

Raws li pom nyob rau hauv cov lus hauv qab no, PBAT tam sim no nyob rau hauv kev tsim kho + npaj kev tsim kho yog xam raws li thawj-theem kev tsim khoom muaj peev xwm, ntxiv rau cov peev txheej qub, tej zaum yuav muaj 2.141 lab tons ntawm cov peev txheej hauv 2021. Xav txog qee qhov tseeb thawj theem. ntau lawm tsis tuaj yeem ua tiav rau hauv kev ua haujlwm, lub peev xwm ntau lawm yog li 1.5 lab tons.

Tus nqi qub ntawm PLA yog siab dua PBAT, tab sis vim tias cov khoom siv lub hnab ntim tau raug cuam tshuam thawj zaug los ntawm txoj cai, ua rau PBAT hauv cov khoom luv luv, tib lub sijhawm, tus nqi ntawm PBAT monomer BDO tau nce siab, tam sim no kev zoo nkauj network liab PBAT tau nrawm nrawm nrog tus nqi ntawm PLA.

Thaum PLA tseem yog tus tub huabtais me ntsis nyob ntsiag to, tus nqi kuj tseem ruaj khov, ntawm ntau dua 30,000 yuan / tuj.

Cov saum toj no yog kev sib piv dav dav ntawm ob cov ntaub ntawv. Thaum sib tham nrog cov neeg hauv kev lag luam txog cov khoom siv twg zoo dua yav tom ntej, txhua tus neeg muaj kev xav sib txawv. Qee tus neeg xav tias PLA yuav yog lub hauv paus rau yav tom ntej.

Qee tus neeg xav tias PBAT yuav yog qhov tseem ceeb, vim tias xav tias PLA feem ntau yog los ntawm pob kws, qhov teeb meem ntawm cov pob kws puas tuaj yeem daws tau? Txawm hais tias PBAT yog petrochemical, nws muaj qee qhov zoo ntawm cov khoom siv raw thiab tus nqi.

Qhov tseeb, lawv yog ib tsev neeg, tsis muaj kev sib cav loj, tsuas yog siv tau yooj yim, kawm los ntawm ib leeg txhawm rau ua si lub zog loj tshaj!