1. Nkag siab txog kev ua haujlwm ntawmcov khoomthiab paub qhov txawv seb nws puas yog tshuaj lom los yog tsis.Qhov no feem ntau yog nyob ntawm seb cov khoom siv yas yog ua los ntawm, thiab seb cov yas yas, stabilizers, thiab lwm yam ntxiv rau hauv nws.Feem ntau, cov hnab yas ntim khoom noj, lub raj mis, lub thoob, lub raj mis dej, thiab lwm yam uas muag hauv khw feem ntau yog polyethylene plastics, uas yog lubricated rau qhov kov, thiab saum npoo yog zoo li ib txheej ntawm wax, uas yooj yim rau hlawv, nrog rau daj nplaim thiab dripping wax.Nrog cov ntxhiab tsw paraffin, cov yas no tsis muaj tshuaj lom.Kev ntim cov hnab yas lossis cov thawv ntim khoom feem ntau yog ua los ntawm polyvinyl chloride, nrog cov hmoov lead-muaj ntsev stabilizers ntxiv rau lawv.Thaum kov ntawm tes, cov yas no nplaum thiab tsis yooj yim rau hlawv.Nws tawm tam sim ntawd tom qab tawm hauv hluav taws.Cov nplaim yog ntsuab, thiab qhov hnyav hnyav.Cov yas no muaj tshuaj lom.
2. Tsis txhob sivcov khoom yasmus ntim cov roj, vinegar thiab cawv nyob rau hauv yuav.Txawm tias cov thoob dawb thiab translucent muag hauv khw tsis muaj tshuaj lom, tab sis lawv tsis haum rau lub sijhawm ntev ntawm cov roj thiab kua txiv hmab txiv ntoo, txwv tsis pub cov yas yuav o yooj yim, thiab cov roj yuav raug oxidized, tsim cov tshuaj phem rau tib neeg. lub cev;Koj yuav tsum tau them sai sai rau cov cawv txiv hmab, lub sij hawm yuav tsum tsis txhob ntev dhau lawm, ntev heev yuav txo tau cov aroma thiab degree ntawm cawu cub.
Nws yog ib qho tseem ceeb heev uas yuav tsum tsis txhob siv tshuaj lom PVC thoob los tuav cov roj, vinegar, cawv, thiab lwm yam, txwv tsis pub nws yuav kis tau cov roj, vinegar thiab cawv.Nws tuaj yeem ua rau mob, xeev siab, ua xua ntawm daim tawv nqaij, thiab lwm yam, thiab tseem ua rau cov pob txha pob txha thiab daim siab ua rau mob hnyav.Tsis tas li ntawd, peb kuj yuav tsum tau xyuam xim tsis txhob siv cov thoob ntim cov roj av, roj av, roj av, roj av, toluene, ether, thiab lwm yam, vim hais tias cov khoom no yooj yim rau soften thiab o ntawm cov yas kom txog thaum nws tawg thiab puas, ua rau muaj kev xav tsis thoob.
3. Ua tib zoo saib xyuas thiab tiv thaiv kev laus.Thaum tib neeg siv cov khoom siv yas, lawv feem ntau ntsib cov xwm txheej xws li tawv tawv, brittleness, discoloration, tawg thiab kev ua haujlwm degradation, uas yog yas laus.Txhawm rau daws qhov teeb meem kev laus, tib neeg feem ntau ntxiv qee cov tshuaj tiv thaiv kab mob rau cov yas kom qeeb cov laus.Qhov tseeb, qhov no tsis tsim nyog daws qhov teeb meem.Txhawm rau ua kom cov khoom yas ruaj khov, nws yog qhov tsim nyog yuav tsum siv lawv kom zoo, tsis txhob raug tshav ntuj, tsis txhob los nag, tsis txhob ci rau hluav taws lossis cua sov, thiab tsis txhob sib cuag nrog dej lossis roj.
4. Tsis txhob hlawv pov tsegcov khoom yas.Raws li tau hais dhau los, cov khoom siv tshuaj lom neeg tsis yooj yim rau hlawv, vim tias lawv tawm cov pa luam yeeb dub, tsw ntxhiab thiab cov pa phem thaum hlawv, uas ua rau muaj kev phom sij rau ib puag ncig thiab tib neeg lub cev;thiab kev kub nyhiab uas tsis muaj tshuaj lom yuav ua rau ib puag ncig thiab cuam tshuam rau tib neeg kev noj qab haus huv.Nws kuj tuaj yeem ua rau muaj ntau yam mob.