Vim li cas thiaj siv biodegradable plastics?
Yas yog cov khoom siv tseem ceeb. Nrog txoj kev loj hlob sai ntawm kev lag luam thiab kev lag luam thiab kev tshwm sim ntawm ntau qhov kev lag luam tshiab xws li kev lag luam e-lag luam, kev xa khoom xa tuaj thiab nqa tawm, kev noj cov khoom yas yog nce sai.
Yas tsis tsuas yog ua kom yooj yim rau tib neeg lub neej, tab sis kuj ua rau "dawb paug", uas ua rau muaj kev puas tsuaj loj rau ib puag ncig ecological thiab tib neeg kev noj qab haus huv.
Tuam Tshoj tau nthuav tawm lub hom phiaj ntawm kev tsim lub Tuam Tshoj zoo nkauj, thiab kev tswj hwm ntawm "dawb paug" yog qhov xav tau los txhim kho qhov zoo ntawm ib puag ncig ecological thiab tsim lub Tuam Tshoj zoo nkauj.
Dab tsi yog biodegradable plastics?
Cov yas degradable yog cov yas uas degraded los ntawm kev ua ntawm cov kab mob hauv cov xwm txheej, xws li av, xuab zeb av, ib puag ncig dej tshiab, dej hiav txwv ib puag ncig thiab tej yam kev mob xws li composting lossis anaerobic digestion, thiab thaum kawg degraded rau carbon dioxide (CO2) los yog / thiab methane (CH4), dej (H2O) thiab mineralized inorganic ntsev ntawm lawv cov khoom, nrog rau cov biomass tshiab (xws li cov kab mob tuag, lwm yam).
Dab tsi yog pawg ntawm cov yas degradable?
Raws li Daim Ntawv Qhia Txheej Txheem rau Kev faib tawm thiab kev sau npe ntawm cov khoom yas degradable tsim los ntawm Tuam Tshoj Federation of Light Industry, degradable plastics muaj cov cwj pwm degradation sib txawv hauv cov av, compost, dej hiav txwv, dej tshiab (dej, dej ntws, pas dej) thiab lwm qhov chaw.
Raws li kev sib txawv ib puag ncig, cov yas degradable tuaj yeem muab faib ua:
Av degradable plastics, composting degradable plastics, dej tshiab ib puag ncig degradable plastics, sludge anaerobic digestion degradable plastics, siab khoom anaerobic digestion degradable plastics.
Dab tsi yog qhov txawv ntawm cov yas degradable thiab cov yas zoo tib yam (tsis-degradable)?
Cov khoom siv niaj hnub yog tsim los ntawm polystyrene, polypropylene, polyvinyl chloride thiab lwm yam polymer compounds nrog molecular hnyav ntau pua txhiab thiab cov qauv tshuaj ruaj khov, uas nyuaj rau degraded los ntawm cov kab mob.
Nws yuav siv sij hawm 200 xyoo thiab 400 xyoo rau cov tsoos plastics kom degrade nyob rau hauv tej yam ntuj tso ib puag ncig, yog li nws yog ib qho yooj yim ua rau ib puag ncig muaj kuab paug los ntawm pov tseg cov tsoos plastics ntawm yuav.
Biodegradable plastics yog qhov sib txawv ntawm cov yas yas hauv cov qauv tshuaj. lawv cov saw tseem ceeb polymer muaj ntau cov ester bonds, uas tuaj yeem zom thiab siv los ntawm cov kab mob, thiab thaum kawg decomposed rau hauv me me molecules, uas yuav tsis ua rau muaj kuab paug mus ntev rau ib puag ncig.
Puas yog cov "cov hnab yas zoo ib puag ncig" hauv khw biodegradable?
Raws li daim ntawv lo yuav tsum tau ntawm GB / T 38082-2019 "Biodegradable yas khw hnab", raws li qhov sib txawv ntawm kev siv cov hnab yuav khoom, cov hnab yuav khoom yuav tsum tau cim kom meej tias "khoom noj khoom noj ncaj qha mus rau lub hnab yas khw" lossis "cov khoom tsis yog khoom noj ncaj nraim. biodegradable yas khw hnab ". Tsis muaj "ib puag ncig tus phooj ywg lub hnab yas" logo.
Cov hnab yas tiv thaiv ib puag ncig ntawm kev ua lag luam yog cov gimmicks ntau tsim los ntawm cov lag luam hauv lub npe ntawm kev tiv thaiv ib puag ncig. Thov qhib koj lub qhov muag thiab xaiv kom zoo.
Post lub sij hawm: 02-12-22