Feem ntau, cov tshuaj tiv thaiv kab mob sib xyaw ua ke nrog cov xim thiab lwm cov koom haum hauv ib qho khoom siv sab hauv lossis extruder. Technically, ib tug ntshiab antistatic tus neeg sawv cev, xws li ib tug ethoxylated alkylamine, muaj qhov ntxiv kom zoo dua uas nws muaj peev xwm yaj thaum lub sij hawm ua kua txhaj molding thiab yog li ua raws li ib tug dispersant rau cov xim masterbatch. Antistatic masterbatches tuaj yeem ntxiv ncaj qha rau cov cuab yeej ua tiav. Cov nyhuv ntawm sab hauv antistatic tus neeg saib xyuas muaj ntau yam ua rau kev tsim khoom thiab kev ua haujlwm ntawm cov khoom kawg. Piv txwv li, cov khoom antistatic ntawm kev txhaj tshuaj molded cov khoom nyob ntawm qhov kub ntawm cov pwm. Feem ntau, thaum qhov kub ntawm pwm qis dua, tus neeg sawv cev antistatic migrate sai dua, yog li txhim kho cov kev ua haujlwm antistatic.
Muaj ob txoj hauv kev los ntsuam xyuas cov nyhuv ntawm cov tshuaj tiv thaiv kab mob: nto tiv thaiv (tus nqi) txoj kev thiab electrostatic decay method; ob txoj kev yog dav siv.
Raws li lub ntsiab lus ntawm ASTMD257-78, qhov saum npoo ntawm cov khoom siv yog qhov sib piv ntawm qhov muaj peev xwm gradient mus rau qhov tam sim no dhau los ntawm chav tsev dav ntawm cov khoom nto, uas muaj feem xyuam rau cov qauv geometry hauv txoj cai. Ob lub electrodes tau muab tso rau tib sab ntawm lub ntsej muag ntawm cov qauv yas, thiab ib qho ncaj qha tam sim no dhau los ntawm cov electrodes; tam sim no los ntawm tus qauv yog ntsuas, thiab qhov kev tiv thaiv yog xam; Tom qab ntawd qhov kev ntsuas ntawm qhov saum npoo yog qhia hauv ohms.
Raws li tau hais los ntawm Tsoom Fwv Teb Chaws Kev Ntsuas Method 4046, electrostatic decay yog tus nqi ntawm tus nqi induced tawm. Ib qho qauv (feem ntau yog ib lub phaj nyias lossis zaj duab xis) muab tso rau ntawm ob lub electrodes ntawm qhov deb ntawm ob peb millimeters ntawm qhov chaw ntawm tus qauv. Ib lub tshuab hluav taws xob txuas nrog lub zog hluav taws xob, lwm lub tshuab hluav taws xob txuas nrog lub ammeter thiab lub kaw lus, thiab qhov kev hloov pauv ntawm cov hluav taws xob hluav taws xob tshwm sim los ntawm tus nqi induced ntawm tus qauv nto los ntawm ib qho electrode yog ntsuas los ntawm lwm yam electrode. Antistatic cov qauv yuav nthuav tawm induced charge decay. Qhov kev lwj ib nrab-lub neej (hauv vib nas this) yog lub sijhawm nws siv rau kev ua kom lwj los ntawm ib nrab ntawm nws tus nqi qub.
Lwm cov qauv kev xeem uas tau siv dav hauv kev lag luam yog US Tub Rog Standard, uas yog tshwj xeeb rau kev ntim cov khoom siv hluav taws xob. Kev xaiv ntawm txoj kev tsim nyog nyob ntawm qhov kawg ntawm kev siv cov yas los kuaj.
Lub resistivity ntawm cov yas nws tus kheej yog 1014 ohms. Thaum tus neeg sawv cev antistatic ntxiv nyob rau hauv tus nqi qhia nyob rau hauv lub rooj, lub resistivity yuav poob mus rau 1013 rau 109 ohms. Yog tias koj xav kom txo qis qhov kev tiv thaiv ntxiv, koj tuaj yeem tso siab rau kev txhim kho cov conductivity, xws li kev siv cov pa roj carbon dub. txhim kho
Antistatic ntim tshuab yog tsim los hais txog kev txhawj xeeb ntawm ib puag ncig. Cov khoom siv dav siv ethoxylated alkylamines tau ntim rau hauv cov thawv ntim khoom siv. Cov neeg muag khoom zoo li tsim cov tshuaj tiv thaiv kab mob ntau dua, uas tuaj yeem diluted raws li kev xav tau tom qab lawv nyob hauv tes ntawm cov neeg siv. Lub hom phiaj ntawm qhov no yog txhawm rau txo tus nqi ntawm cov khoom pov tseg. Los ntawm kev tsim cov tshuaj tiv thaiv zoo li qub, cov tuam txhab tsim khoom tuaj yeem xa cov tshuaj tua kab mob ntau dua ib zaug thiab txo cov ntim ntim uas yuav tsum tau ua los ntawm cov neeg siv.
Los ntawm ib qho kev pom zoo, ntau txoj kev tshawb fawb thiab kev txhim kho ua haujlwm txuas ntxiv mus ncig lub khw ntim khoom rau cov khoom siv hluav taws xob. Ethoxylated lauramides, feem ntau suav hais tias yog amine-free antistatic agents, feem ntau siv rau qhov no. Kev siv ethoxylated lauramide hauv tshuab moulding LDPE thiab LLDPE zaj duab xis kuj nce ntxiv vim nws cov nyhuv antistatic zoo dua nyob rau hauv cov av qis. Concentrates thiab masterbatches ntawm cov khoom no kuj muaj. Ethoxylated stearylamines (muaj cov saturated tag nrho 18-carbon alkyl chains) tau siv rau hauv kev tsim cov yeeb yaj kiab biaxially oriented polypropylene, qhov kub ua haujlwm siab yuav tsum muaj cov tshuaj tiv thaiv zoo nrog cov thermal stability.
