Plastics yog dab tsi?Puas muaj tshuaj lom?

Plastics yog dab tsi?

Yas yog ib yam khoom siv hluavtaws, tseem hu ua yas.Nws yog tsim los ntawm cov khoom siv polymer los ntawm cov tshuaj tiv thaiv polymerization, thiab muaj plasticity thiab processability.Plastics yog dav siv nyob rau hauv ntau yam teb, xws li ntim, kev tsim kho, tsheb, electronics thiab thiaj li nyob.

Cov khoom tseem ceeb ntawm cov yas yog cov polymers, feem ntau yog polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) thiab lwm yam.Cov khoom siv yas sib txawv muaj cov yam ntxwv sib txawv thiab siv.Piv txwv li, polyethylene muaj zoo toughness thiab corrosion kuj, thiab feem ntau yog siv los ua cov hnab yas thiab ntim khoom;PVC muaj cov huab cua tsis zoo thiab rwb thaiv tsev, thiab feem ntau yog siv los ua cov kav dej thiab xaim bushings.

Puas yog yas muaj tshuaj lom?

Cov lus nug ntawm seb cov yas puas yog tshuaj lom yuav tsum tau soj ntsuam raws li cov khoom siv yas tshwj xeeb.Feem ntau, cov ntaub ntawv yas feem ntau muaj kev nyab xeeb thiab tsis muaj mob nyob rau hauv ib txwm siv.Txawm li cas los xij, qee cov ntaub ntawv yas yuav muaj cov tshuaj uas tsim kev puas tsuaj rau tib neeg kev noj qab haus huv, xws li Phthalates thiab bisphenol A (BPA).Cov tshuaj no tuaj yeem ua rau muaj kev cuam tshuam rau lub cev endocrine system thiab kev ua me nyuam.

Txhawm rau kom muaj kev nyab xeeb ntawm cov khoom yas, ntau lub teb chaws thiab cheeb tsam tau tsim cov kev cai thiab cov qauv tsim nyog los txwv kev siv cov khoom tsis zoo.Piv txwv li, European Union tau tsim cov kev cai REACH ntawm cov ntaub ntawv yas, thiab Tebchaws Meskas FDA tau tsim cov qauv ntawm cov khoom noj khoom haus.Cov kev cai thiab cov qauv no xav kom cov neeg tsim khoom yas los tswj cov ntsiab lus ntawm cov khoom phom sij hauv cov txheej txheem tsim khoom thiab ua cov kev ntsuam xyuas thiab ntawv pov thawj.

Tsis tas li ntawd, kev siv kom raug thiab pov tseg cov khoom yas kuj yog ib qho tseem ceeb kom muaj kev nyab xeeb.Piv txwv li, tsis txhob muab cov zaub mov kub los yog cov kua dej tso rau hauv kev sib cuag ncaj qha nrog cov thawv yas los tiv thaiv kev tsiv teb tsaws ntawm cov khoom tsis zoo;Tsis txhob raug tshav ntuj ntev los tiv thaiv kev laus ntawm cov yas thiab tso tawm cov khoom tsis zoo.

Piv txwv li, yas yog ib yam khoom siv hluavtaws, ua los ntawm polymers.Cov ntaub ntawv yas feem ntau muaj kev nyab xeeb thiab tsis muaj kev phom sij nyob rau hauv ib txwm siv, tab sis qee cov ntaub ntawv yas yuav muaj cov tshuaj uas tsim kev puas tsuaj rau tib neeg kev noj qab haus huv.Txhawm rau kom muaj kev nyab xeeb ntawm cov khoom yas, nws yog ib qho tsim nyog yuav tsum ua raws li cov cai thiab cov qauv, thiab kev siv thiab pov tseg cov khoom yas kom raug.