Cov ntaub ntawv tseem ceeb ntawm cov hnab tso zis tso zis suav nrog polyvinyl chloride (PVC), silicone thiab abs.
Cov khoom siv ntawm cov zis lub hnab muaj qhov cuam tshuam tseem ceeb rau nws cov kev ua tau zoo thiab cov neeg siv. Polyvinyl chloride (PVC) yog ib qho khoom siv rau cov hnab tso zis, uas muaj kev sib khi zoo thiab ruaj khov, tab sis tej zaum yuav ua rau kev ua xua. Silicone cov ntaub ntawv feem ntau siv nyob rau hauv daim ntawv thov cov xwm txheej uas yuav tsum muaj kev nplij siab ntau dua, xws li cov khoom siv kho mob, vim tias nws cov muag muag thiab zoo biocompatibility. Cov khoom siv ABS yog siv rau qhov txuas ntxiv ntawm lub hnab tso zis los muab cov qauv kev txhawb nqa thiab kev txhawb nqa.
Thaum xaiv lub hnab tso zis, ntxiv rau cov khoom siv, lwm yam xws li muaj peev xwm, kev siv ntawm kev siv yuav tsum tau txiav txim siab. Lub peev xwm yuav tsum tau raug xaiv raws li tus neeg tso zis tso zis, feem ntau nrog cov lus qhia tshwj xeeb xws li 500ml thiab 1000mL. Kev nplij siab yog cuam tshuam nrog tus qauv ntawm cov zis lub hnab, xws li anti-txhuam cov phluing tuaj yeem ua kom cov kev nplij siab ntawm kev hnav. Ib lub hnab tso zis nrog kev sib khi zoo tuaj yeem tiv thaiv cov tshuaj tiv thaiv, kis tus kab mob thiab ntxhiab. Yooj yim ntawm kev siv suav nrog kev ua haujlwm yooj yim ntawm tus qauv hloov thiab qhov yooj yim ntawm kev ntxuav thiab hloov.