Cov yas tuaj qhov twg?
Raws li peb txhua tus paub, yas yog peb cov khoom tseem ceeb.Yog li ntawd cov yas tuaj qhov twg?Nov yog cov lus teb rau koj.Kev maj mam poob ntawm ntxhw ntxhw nyob rau hauv lub lig 19th thiab thaum ntxov 20th centuries, nrog rau kev loj hlob ntawm loj-scale yos hav zoov thiab cov hniav ua lag luam, tsim ib tug xav tau rau lwm yam ntaub ntawv.Raws li qhov tshwm sim, ntau tus kws tshawb fawb tau pib tshawb nrhiav cov ntaub ntawv uas tuaj yeem siv los tsim cov txheej txheem nyuaj, du ntawm cov hniav cuav.Cov txiaj ntsig no thaum kawg coj mus rau kev tsim cov yas.
Kev tsim kho niaj hnub ntawm cov yas
Xyoo 1856, British chemist Alexander Paxton tau tsim cov khoom siv yas - Paxton chemical artificial ivory, uas suav tias yog lub hauv paus ntawm kev lag luam niaj hnub plastics.
Dab tsi yog qhov tshiab tsis tshua muaj nyob rau xyoo 1970, cov hnab yas khw muag khoom tam sim no yog cov khoom lag luam thoob ntiaj teb, nrog ntau txhiab lab ntawm lawv tsim txhua xyoo hauv txhua lub ces kaum ntawm lub ntiaj teb.
Txheej txheem cej luam ntawm peb lub tuam txhab cov khoom yas
Muaj ntau hom yas, thiab peb lub tuam txhab yog ib qho chaw tsim khoom ntawm cov thawv yas rau cov tshuaj pleev ib ce, kev lag luam, cov khoom siv hluav taws xob, cov khoom ua si tshuab, cov khoom siv niaj hnub sib koom ua ke kev tsim kho, tsim thiab muag.Peb tsuas yog siv cov khoom siv PE los tsim cov hlab ntsha yas, lub raj mis, lub taub hau taub hau thiab lwm yam khoom yas.Nyob rau hauv kev lag luam tsim Pearl River Delta,peb nyiam kev thauj mus los thiab dej yooj yim heev, tuav cov khoom siv ntau lawm egplastic molding tshuab, lub raj mis tshuab tshuab, tsis siv neeg tshuaj ntsuam tshuab luam ntawv, tshuab gilding, thiab tau nthuav dav ntau lawm.
Peb muab kev pabcuam ua lag luam ib leeg nrog rau cov khoom tsim, kev tsim kho, tshuab, tshuab luam ntawv, ntawv lo, gilding, sanding thiab xa khoom.Lub peev xwm ntau lawm ntawm peb lub tshuab raj kub ceev yog li ntawm 10ml txog 5000ml, tuaj yeem ua tau raws li cov neeg siv khoom xav tau.Yas yog Ameslikas tsim los tiv thaiv ntxhw, tab sis tam sim no kev loj hlob ntawm cov yas tau ua rau muaj kev puas tsuaj rau tsiaj, ib puag ncig thiab txawm tias tib neeg.Kev puas tsuaj los ntawm cov yas yog ze.
Post lub sij hawm: Aug-07-2023