Kev nkag siab yuam kev1: Silicone yog cov khoom siv tshuaj lom neeg lossis cov khoom siv
Thawj cov khoom lag luam silicone uas tuaj rau hauv lub siab feem ntau yog kev cog qoob loo ntawm lub mis, lub cev, cov khoom muaj nyob hauv qee cov tshuaj pleev ib ce, thiab tuaj yeem tsis meej pem nrog silicone. Qhov tseeb yog tias silicones yog ib tsev neeg ntawm cov tshuaj nrog ntau lub xeev (kua, gel, khoom). Tshwj xeeb yog silicone rubbers, uas yog cov molecules ntev tsim los ntawm silicon (Si) thiab oxygen (O), uas tuaj yeem muaj cov khoom sib txawv thiab siv tau rau hauv ntau daim ntawv thov nyob ntawm seb lawv npaj li cas.
Kev nkag siab yuam kev 2: Silicone roj hmab yog cov khoom siv hluavtaws
Silicone roj hmab, nrog rau cov kua silicone roj hmab, yog hluavtaws nyob rau hauv lub siab hais tias nws cov synthesis yog tsim los ntawm tib neeg. Txawm li cas los xij, cov khoom siv raw yog ntuj kiag li: xuab zeb lossis "silica" yog tsim los ntawm silicon thiab oxygen. Qhov tseeb, tib neeg tau siv cov khoom siv silicon ntuj hauv cov xub xub thiab lub tais rau ntau xyoo. Txawm hais tias silicon, silica, thiab silica gel txawv, qhov tsis meej pem yog nkag siab. Kom paub meej: silicon yog cov khoom siv tshuaj lom neeg; silicon dioxide yog ib hom silicon dioxide (xuab zeb) siv los tsim cov khoom siv hauv tsev neeg silicone.
Kev nkag siab tsis meej 3: Silicone roj hmab tsuas tuaj yeem ua tiav thiab siv rau qhov kub thiab txias
Muaj ntau hom silicones, xws li chav tsev kub vulcanizing (RTV) silicone rubbers uas tuaj yeem ua tiav thiab siv rau hauv chav tsev kub. Yog tias daim ntawv thov yuav tsum tau siv cov kua roj hmab silicone (LSR), nws tuaj yeem hloov kho kom nws tuaj yeem ua pwm thiab vulcanized ntawm qhov kub thiab txias. Qhov no tsuas yog siv rau hauv kev siv hluav taws xob thiab hluav taws xob thiab hauv kev tsim cov pwm silicone.
Kev nkag siab yuam kev 4: Silicone roj hmab yog nplaum heev
Cov lus dab neeg no tau ua nrog kev xav ntawm silicone roj hmab. Feem ntau, tib neeg xav tias tag nrho cov roj hmab silicone yog tacky, tab sis qhov no nyob ntawm kev ua thiab daim ntawv thov xav tau. Piv txwv li, nyob rau hauv kev rwb thaiv tsev cable los yog nyob rau hauv kev kho mob daim ntaub ntawv uas cov kua silicone roj hmab yog siv, lub nto ntawm ib feem yuav tsum du li sai tau yam tsis muaj stickiness. Silicone roj hmab formulations tuaj yeem hloov kho kom sib xyaw mica lossis hloov cov txheej txheem ua haujlwm.
Kev nkag siab yuam kev 5: Silicone roj hmab yog mos thiab elastic
Shore hardness yog cov nplai siv los ntsuas qhov hardness ntawm silicone, piv txwv li, cov roj hmab band muaj Shore hardness ntawm 25, thaum cov menyuam los yog cov menyuam skate muaj Shore hardness ntawm 100. Tag nrho cov silicones feem ntau suav hais tias muaj qhov hardness tsawg dua. tshaj 40 Shore A, yog li lawv suav hais tias muaj cov khoom siv tshuab qis. Txawm li cas los xij, qhov no tsis yog li ntawd. Muaj ntau txoj hauv kev los ua kom lub zog ntawm cov roj hmab silicone, xws li tsim ntau qhov sib txuas los yog ntxiv cov fillers. Piv txwv li, Shore hardness ntawm optical kua silicone roj hmab yog 70, uas yog yuav luag inelastic.
Kev nkag siab yuam kev 6: Silicone roj hmab yuav tsim cov pa taws ntau thaum nws hlawv
Kev hlawv roj hmab silicone ntseeg tias tsim cov pa taws thiab cov pa roj uas tsis zoo rau qee qhov kev siv. Qhov tseeb, silicone roj hmab yog inherently self-extinguishing. Raws li kev sib xyaw ua ke ntawm cov roj hmab silicone, ntxiv cov nplaim hluav taws tuaj yeem tshem tawm tag nrho cov cim ntawm cov roj thiab cov pa luam yeeb, thiab ua tau raws li cov qauv kev cai.
Kev nkag siab yuam kev 7: Silicone roj hmab yuav ua rau huab cua paug
Cov tshuaj ua rau muaj kuab paug ib puag ncig yog volatile organic compounds (VOCs) xws li acetone, alcohols, methacrylates, acetates, thiab lwm yam. Chlorofluorocarbons (CFCs) tau txiav txim siab tias muaj kev cuam tshuam rau txheej txheej ozone. Vim lawv qhov xwm txheej tsis zoo, cov khoom siv silicone lossis cov khoom sib tov tsis muaj cov tshuaj phem no.
Kev nkag siab yuam kev 8: Silicone roj hmab yuav siv ntau txhiab xyoo kom degrade
Los ntawm cov lus txhais ntawm biodegradable, silicone roj hmab tsis biodegradable. Txawm li cas los xij, nyob rau hauv qee qhov xwm txheej, cov pob txha silicon-oxygen tuaj yeem tawg mus rau hauv dej, silicic acid, thiab carbon dioxide. Hnub ci thiab atmospheric oxygen tsim cov khoom hnyav molecular silicone chains (cyclopentasiloxane). Thaum lawv raug faus, cov av hauv av ua haujlwm ua cov khoom siv hluav taws xob, ua kom cov saw hlau nrawm nrawm thiab degrading cov roj hmab silicone hauv ob peb hnub xwb.
Kev nkag siab yuam kev9: Silicone tuaj yeem ua rau ua xua thiab khaus khaus
Ntau cov kev tshawb fawb tau ua tiav ntawm cov ncauj lus no, thiab tsis zoo li lwm hom roj hmab (xws li cov roj hmab ntuj latex), silicone roj hmab tsis ua rau tawv nqaij lossis ua rau muaj kev tsis haum tshuaj. Qhov tseeb, cov khoom siv roj ntsha tsis zoo ntawm silicones, nrog rau cov kua roj hmab silicone, yog qhov zoo dua.
Kev nkag siab yuam kev 10: Silicone roj hmab yog bioaccumulative hauv tib neeg lub cev
Bioaccumulation yog "kev sib sau ntawm cov tshuaj lom nyob rau hauv cov ntaub so ntswg ntawm cov kab mob nyob. Qhov no tshwm sim thaum tus nqi ntawm kev noj cov tshuaj ntau dua tus nqi ntawm excretion los yog metabolic transformation ntawm cov khoom". Hauv kev sim dav, silicone roj hmab muaj kev sib raug zoo nrog tib neeg cov ntaub so ntswg thiab cov kua hauv lub cev piv rau lwm cov elastomers, thiab nthuav tawm cov ntaub so ntswg tsawg heev thaum cog. Tsis muaj ntxhiab tsw thiab tsis qab, silicone tsis txhawb kev loj hlob ntawm cov kab mob thiab yuav tsis stain los yog corrode lwm yam ntaub ntawv. Lawv feem ntau yog tsim los ua raws li FDA, ISO, thiab tripartite cov lus qhia rau biocompatibility ntawm cov khoom kho mob.
Kev nkag siab yuam kev 11: Silicone roj hmab tuaj yeem ua rau muaj kab mob
Vim tias ntau cov ntawv thov ntawm silicone roj hmab tuaj yeem tiv nrog tib neeg lub cev lossis khoom noj, muaj kev txhawj xeeb tias cov khoom yuav ua rau muaj kab mob. Nyob rau hauv cov nqe lus ntawm kev tso tawm ntawm cov molecules thaum lub sij hawm daim ntawv thov, lawv loj heev mus rau nkag mus rau cov ntaub so ntswg. US Food and Drug Administration (FDA) nruj heev rau cov ntaub ntawv uas tuaj rau hauv kev sib cuag nrog tib neeg thiab tau txais kev pom zoo rau kev siv nrog consumables xws li zaub mov thiab dej haus, thiab zaub mov-zoo silicone kuj siv nyob rau hauv cov tshuaj pleev ib ce thiab tshuaj industries.