Cov yas thiab cov ntaub ntawv qub yog qhov sib txawv, qhov kev hloov zuj zus ntawm cov thev naus laus zis tau nrawm dua. Cov kev tsim thev naus laus zis tshiab, cov ntaub ntawv tshiab thiab cov txheej txheem tshiab ua qhov zoo ntawm cov kav dej yas dhau ntawm cov ntaub ntawv ib txwm muaj ntau dua thiab muaj koob meej. Piv nrog rau cov yeeb nkab hlau tsoos thiab cov yeeb nkab ua yeeb yam, cov yeeb nkab yas dua ntais hauv qhov hnyav, feem ntau tsuas yog 1 / 6-1 / 10 ntawm cov yeeb nkab hlau. Nws muaj kev txhim kho zoo corrosion, feem cuam tshuam thiab tensile lub zog. Qhov saum npoo ntawm cov yeeb nkab yas yog qhov yooj yim dua li ntawm cov yeeb nkab cam khwb cia, thiab cov txhuam kev sib txhuam yog me dua, cov kua dej tsis kam, thiab lub zog noj ntawm cov dej qhia tuaj yeem txo ntau dua 5%. Cov kev txuag hluav taws xob thiab kev tsim lub zog zoo dua. Qhov kev noj tau txo los ntawm 75%, qhov kev thauj mus los yooj yim, kev teeb tsa tau yooj yim, thiab kev pab lub neej ntev txog 30-50 xyoo. Polyethylene yeeb nkab tau tsim kho sai heev hauv lub ntiaj teb. Daim ntawv thov ntawm cov kav dej polyethylene hauv chaw tso dej thiab roj teb hauv cov teb chaws tau tsim tau coj tus kom zoo dua. Cov kav dej polyethylene tsis tsuas yog siv dav los hloov cov tsoos steel kav, kav hlau kav, thiab lwm yam, tab sis kuj tseem hloov cov kav dej polyvinyl chloride. Qhov laj thawj nyob hauv qhov thev naus laus zis hloov kho ntawm cov kav dej polyethylene. Ntawm ib sab, cov khoom siv tau ua tiav zoo heev. Los ntawm kev txhim kho cov txheej txheem polyethylene polymerization, lub zog ntawm cov khoom tshwj xeeb rau cov yeeb nkab polyethylene tau yuav luag ob npaug. Ntawm qhov tod tes, muaj cov kev tsim kho tshiab hauv kev siv tshuab, xws li thev naus laus zis ntawm cov yeeb nkab polyethylene los ntawm kev taw qhia qhov tsis muaj qhov nqaj hlau, muab kev ua si tag nrho rau qhov zoo ntawm cov yeeb nkab polyethylene, kom cov kav dej ib txwm tsis muaj kev sib tw thaum tsim nyog kom siv cov qauv no. Ntau cov ntaub ntawv tshiab thiab thev naus laus zis tau kawm, los yog tau tsim kho thiab sim. Nws paub tseeb tias kev vam meej thev naus laus zis ntawm cov kav dej yas hauv 10 xyoo tom ntej no yuav txhawb txoj kev txhim kho yas yeeb nkab txuas ntxiv sai thiab dav.
Cim npe nrov: nws pib yas hose, Tuam Tshoj, tuam ntxhab, lwm tus neeg, Hoobkas, lag luam, ua nyob rau hauv Suav teb
