Thaum nws los txog rau kev ntim khoom, cov khoom siv ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev nyab xeeb thiab kev ncaj ncees ntawm cov khoom. Ib qho kev daws teeb meem ntim khoom siv tau zoo thiab muaj txiaj ntsig zoo yog ob txheej PE raj. Cov raj no yog ua los ntawm polyethylene (PE), uas yog ib hom yas siv dav dav uas paub txog nws qhov ruaj khov thiab yooj ywm. Ob txheej ntawm cov raj no muab kev ruaj khov ntxiv thiab cov khoom thaiv, ua rau lawv haum rau ntau yam kev siv thoob plaws ntau yam lag luam.
Cov raj PE ob txheej no yog tsim los muab kev tiv thaiv thiab kev yooj yim. Lub txheej sab hauv ntawm lub raj feem ntau yog ua los ntawm cov polyethylene qis-density (LDPE), uas paub txog nws qhov kev ywj pheej thiab kev tiv thaiv dej noo. Lub txheej sab hauv no ua haujlwm ua ib qho thaiv, tiv thaiv cov ntsiab lus los ntawm kev xau lossis raug kuab paug los ntawm cov yam sab nraud. Lub txheej sab nraud, ntawm qhov tod tes, yog ua los ntawm cov polyethylene siab-density (HDPE), uas ntxiv lub zog thiab kev ruaj khov rau lub raj. Qhov kev tsim kho ob txheej no muab ib txheej ntxiv ntawm kev tiv thaiv, ua rau cov raj no zoo tagnrho rau kev ntim ntau yam khoom, suav nrog cov tshuaj, cov khoom siv tu tus kheej, cov khoom noj, thiab cov tshuaj lom neeg hauv kev lag luam.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev siv ob txheej PE raj yog lawv qhov kev siv tau ntau yam. Cov raj no muaj ntau qhov loj thiab duab sib txawv, ua rau lawv haum rau ntau hom khoom sib txawv. Txawm tias nws yog tshuaj pleev, tshuaj pleev, gel, tshuaj pleev, lossis lwm yam khoom nplaum, ob txheej PE raj muab kev daws teeb meem ntim khoom yooj yim thiab txhim khu kev qha. Qhov yooj ywm ntawm LDPE txheej sab hauv ua rau yooj yim faib cov khoom, thaum HDPE txheej sab nraud ua kom lub raj tseem zoo thaum tuav thiab thauj mus los.
Ntxiv rau lawv qhov kev ywj pheej thiab lub zog, cov raj PE ob txheej kuj muaj kev luam tawm zoo heev. Qhov no txhais tau tias cov chaw tsim khoom tuaj yeem kho cov raj yooj yim nrog lub npe, cov ntaub ntawv khoom, thiab cov lus qhia siv, txhim kho qhov zoo nkauj thiab kev ua haujlwm ntawm cov ntim khoom. Ntxiv mus, cov raj no tsis hnyav thiab pheej yig, ua rau lawv yog qhov kev xaiv pheej yig rau cov chaw tsim khoom thiab cov neeg siv khoom.
Los ntawm qhov pom ntawm kev ruaj khov, ob txheej PE raj kuj yog ib qho kev xaiv ntim khoom zoo. Polyethylene yog cov khoom siv rov ua dua tshiab, thiab ntau lub tuam txhab tsim khoom siv PE rov ua dua tshiab los tsim cov raj no, txo qhov cuam tshuam rau ib puag ncig thiab txhawb kev lag luam ncig.
Xaus lus, cov raj PE ob txheej muab kev daws teeb meem ntim khoom ruaj khov thiab siv tau ntau yam rau ntau yam khoom. Lawv cov qauv ob txheej muab kev sib npaug ntawm kev ywj pheej, lub zog, thiab cov khoom thaiv, ua rau lawv yog qhov kev xaiv txhim khu kev qha rau cov chaw tsim khoom thiab cov neeg siv khoom. Nrog lub peev xwm los kho, tiv thaiv, thiab faib cov khoom yooj yim, cov raj no tseem yog qhov kev xaiv nrov hauv kev lag luam ntim khoom. Txawm hais tias koj nyob hauv kev lag luam tshuaj, kev saib xyuas tus kheej, lossis zaub mov, cov raj PE ob txheej tsim nyog xav txog rau koj cov kev xav tau ntim khoom.
Lub sijhawm tshaj tawm: Lub Ib Hlis-26-2024