Tsev neeg PVC cov ntaub ntawv yas rooj ntaub, Nws puas tsim kev puas tsuaj rau tib neeg lub cev?

Qee cov softening plasticizers tau ntxiv rau PVC cov ntaub pua rooj thaum lub sijhawm tsim khoom. Environmentally friendly plasticizers tsis muaj teeb meem rau tib neeg lub cev; tab sis ib txwm muaj plasticizers tsis yog tsuas yog ib puag ncig tus phooj ywg, tab sis kuj lom thiab muaj kev pheej hmoo ntawm carcinogenicity. Yog tias muaj qhov txhab ntawm daim tawv nqaij, cov yas yas tuaj yeem nkag mus rau hauv lub cev. Plasticizers yog ib qho yooj yim rau volatilize nyob rau hauv qhov kub thiab txias ib puag ncig, thiab yuav nkag mus rau hauv lub pa ib ntsuj av tau, yog li lub caij ntuj sov thiab lub caij ntuj no yog lub caij muaj kev pheej hmoo siab rau plasticizer tsiv teb tsaws, uas yuav ua rau muaj kev phom sij rau kev noj qab haus huv ntawm cov me nyuam mos thiab cov poj niam pub niam mis; muab cov tais diav rau cov zaub mov kub rau ntawm cov ntaub pua rooj Qhov ntawd yog qhov zoo, tab sis cov dej kub npau npau thiab cov roj soluble tseem txhawb nqa cov plasticizer tsiv teb tsaws.

Tsis tas li ntawd, PVC cov ntaub pua rooj kuj muaj cov stabilizers, uas muaj cov ntsev ua rau lub cev tsis zoo. Txawm li cas los xij, cov neeg siv khoom tsis tas yuav tsis lees paub cov ntaub pua rooj PVC. Kev kho mob-qib lossis cov khoom noj-qib plasticizers thiab stabilizers yuav tsis ua mob rau kev noj qab haus huv.

Plastics yog non-toxic, vim hais tias cov yas yog cov tshuaj macromolecular uas tsis tuaj yeem nqus tau los ntawm tib neeg lub cev. Nws tsuas yog vim hais tias cov additives uas yuav tsum tau ntxiv thaum lub sij hawm ua yog tshuaj lom, los yog cov tshuaj tiv thaiv tsis txaus thaum lub sij hawm synthesis, thiab me me molecule monomers raug tso tawm thaum siv, uas plastics qhia toxicity. Leaded heat stabilizers ntxiv rau kev ua pvc.

PC yog siv nyob rau hauv ib puag ncig kub rau lub sij hawm ntev tso tawm bisphenol A, thiab European Union xav tias nws yuav ua rau precocious puberty. PE, PP, thiab tsiaj additives siv tsawg dua additives, tab sis nws tsis pom zoo kom siv lawv rau lub sij hawm ntev nyob rau hauv ib qho chaw kub. (xws li cov khob yas pov tseg, lub raj mis dej ntxhia, thoob). Engineering plastics tsis muaj tshuaj lom, tab sis lawv tsis tau ntsib hauv lub neej.

Cov yam ntxwv dav dav ntawm cov khoom siv tshuaj lom neeg yog: ntau thiab tuab xim, vim tias muaj ntau cov pigments (organic lossis inorganic) ntxiv. Tab sis cov xim pheej yig yog tshuaj lom. Cov yas tsis huv, nws tuaj yeem muab cov yas rov ua dua lossis sib xyaw nrog lwm cov yas, thiab lub hauv paus ntawm cov yas no tsis tuaj yeem lav tias muaj kev nyab xeeb. Piv txwv li, cov khoom siv kho mob pov tseg thiab cov khib nyiab pov tseg tau siv dua.

Thaum rhuab, nws ua mos thiab xav tias nplaum. PVC yog feem ntau, thiab qhov softer nws yog, ntau plasticizers thiab low-molecular-polymers nws muaj, uas feem ntau tsis zoo. Cov ntaub pua rooj yas tsis tiv tauj cov khoom noj rau lub sijhawm ntev, thiab tsis tiv tauj cov zaub mov thaum kub kub. Cov yas tsis muaj ntxhiab tsw ntxhiab, thiab cov yas laus raug hloov raws sijhawm, uas muaj kev nyab xeeb.