Ntawm ntau cov khw muag khoom thiab kev thauj khoom, oval yas tau siv dav rau lawv cov txiaj ntsig tshwj xeeb. Nws yog qhov tseem ceeb rau cov neeg hauv kev lag luam ntsig txog muaj kev nkag siab tob txog lawv cov ntaub ntawv tseem ceeb.
Cov khoom siv tseem ceeb ntawm oval yas ris yog feem ntau polyethylene (PE). Polyethylene yog ib thermoplastic resin polymerized los ntawm ethylene monomers. Nws muaj cov tshuaj ruaj khov zoo thiab tuaj yeem tiv thaiv cov yaig ntawm ntau yam tshuaj tshuaj tshuaj yeeb tshuaj. Txawm hais tias nws yog acid, alkali lossis qee cov kuab tshuaj organic, nyob rau hauv ib txwm muaj ua los ntawm polyethylene ua tau los ntawm polyethylene ua tau los ntawm polyethylene ua tau los ntawm polyethylene ua tau los ntawm cov khoom siv tshuaj ntsuab nyob rau hauv. Qhov no ua rau nws muaj peev xwm rau kev khaws cia thiab kev thauj mus los ntau cov dej hauv ntau daim teb xws li kev lag luam tshuaj lom neeg, thiab tshuaj.
High-ntom polyethylene (HDPE) yog hom polyethylene feem ntau siv nyob rau hauv oval yas txaws. HDPE muaj qhov ntom ntom ntom thiab lub zog, uas ua rau cov roj hmab yas muaj lub zog muaj zog thiab cuam tshuam tsis kam. Txawm tias nyob hauv ib puag ncig hnyav, xws li raug rau kev sib tsoo thiab kev sib tsoo thaum caij tsheb thiab tsheb thauj mus los, nws tsis yooj yim tawg lossis deform, kom muaj kev nyab xeeb ntawm cov khoom sab hauv.
Tsis tas li ntawd, cov hnab Polyethylene tseem muaj cov khoom siv zoo thiab ua cov khoom lag luam. Los ntawm cov thev naus laus zis tshwj xeeb, polyethylene tuaj yeem yooj yim ua rau hauv oval chim puab, thiab qhov tseeb smoothness thiab nto smoothness ntawm lub thoob tau tuaj yeem lav.
Los ntawm kev tiv thaiv ib puag ncig, Polyethylene yas txeej yog rov ua dua tshiab thiab ua tau raws li txoj cai ntawm kev loj hlob. Nrog rau cov xim tau them rau cov khib nyiab yas, cov yeeb yaj kiab no ua rau oval yas ris ntau dua nyob hauv kev ua lag luam.
Hauv ntej, polyethylene, raws li cov khoom tseem ceeb ntawm oval yas ris, tau dhau los ua cov kua dej uas nyiam siv rau ntau yam tshuaj lom zem, kev tiv thaiv zoo thiab ib puag ncig kev tiv thaiv thiab ib puag ncig.
