Kungani usebenzisa i-Silicone Rubber?
Kuthunyelwe nguNick P ngoFebhuwari 21, '18
Ama-rubbers abicah ayizinhlanganisela zenjoloba ngazo zombili izinto eziphilayo nezingaphili, kanye nesilica efuthwe emsulwa kakhulu njengezinto ezimbili eziyinhloko. Zinezici eziningi ezingekho kwamanye ama-organic rubbers futhi zinezindima ezibalulekile ezimbonini eziningi, njengogesi, ugesi, izimoto, ukudla, ezokwelapha, izinto zasendlini nemikhiqizo yokuzilibazisa. Irabha le-Silicone lihluke ngokukhethekile kunenjoloba ejwayelekile ngoba isakhiwo se-molecule se-polymer siqukethe amaketanga amade okushintshanisa ama-athomu abicah ne-oxygen. Ngakho-ke le polymer inemvelo ephilayo nengaphili. Ingxenye engaphiliyo yenza ukuthi i-polymer imelane kakhulu nokushisa okuphezulu futhi inikeze izakhiwo ezinhle zokuvikela ugesi kanye nokungena kwamakhemikhali, kanti izingxenye zezinto eziphilayo zikwenza kuguquguquke ngokweqile.
Izici
Heat Ukumelana:
Ama-rubbers abicah ayamelana nokushisa ngokweqile uma kuqhathaniswa nama-rubbers ajwayelekile we-organic. Cishe alukho ushintsho kuzakhiwo ku-150oC ngakho-ke zingasetshenziswa cishe unomphela. Ngenxa yokumelana nokushisa kwabo okuhle kakhulu kusetshenziswa kabanzi njengezinto zezingxenye zenjoloba ezisetshenziswa emazingeni okushisa aphezulu.
Cold Ukumelana:
Ama-rubbers abicah ayamelana nokubanda ngokweqile. Iphuzu elibuhlungu lama-rubbers ajwayelekile we-organic cishe angama -20oC kuye ku -30oC. Iphoyinti le-brittle lama-silicone rubbers liphansi njengo -60oC kuya -70oC.
Ukumelana Nesimo Sezulu:
Ama-rubbers abicah anokuphikiswa okuhle kwesimo sezulu. Ngaphansi kwe-ozone ambience ekhiqizwa ngenxa yokukhishwa kwe-corona, ama-rubbers ajwayelekile we-organic ahla kakhulu kodwa ama-silicone rubbers ahlala engathinteki. Ngisho nangaphansi kokuchayeka isikhathi eside kwi-ultraviolet nesimo sezulu, izakhiwo zabo zihlala zingashintshi.
Izakhiwo Zikagesi:
Ama-rubbers abicah anezindawo ezinhle kakhulu zokuvikela ugesi futhi azinzile ngaphansi kobubanzi obuhlukahlukene bobabili imvamisa kanye nokushisa. Akukho ukuwohloka okuphawulekayo kwezimpawu okubonwayo lapho ama-silicone rubbers acwiliswa kuketshezi. Ngakho-ke kungcono kakhulu ukuthi asetshenziswe njengabavikeli bakagesi. Ikakhulukazi ama-rubbers abicah amelana kakhulu nokukhishwa kwe-corona noma ugesi kumandla aphezulu kakhulu ngakho-ke asetshenziswa kakhulu njengezinto zokuvikela izingxenye zamandla aphezulu.
Ukuqhuba kagesi:
Ama-rubbers kagesi abamba ugesi ayizinhlanganisela zenjoloba enezinto ezisebenza ngogesi ezifana nekhabhoni efakiwe. Imikhiqizo ehlukahlukene enokumelana kagesi kusuka ku-ohms-cm kuya ku-e + 3 ohms-cm iyatholakala. Ngaphezu kwalokho, ezinye izakhiwo nazo ziyaqhathaniswa nalezo ze-rubbers ejwayelekile ye-silicone. Ngakho-ke asetshenziswa kabanzi njengezindawo zokuxhumana zamakhibhodi, azungeze ama-heater futhi njengezinto zokuvala uphawu zezinto ezilwa ne-static nezintambo zamandla aphezulu. Ngokuvamile, ama-rubbers kagesi e-conductive kagesi atholakala emakethe ikakhulukazi lawo ane-resistivity yevolumu kagesi esukela ku-1 kuye ku-e + 3 ohms-cm.
Ukukhathala Ukumelana:
Ngokuvamile imicibisholo ye-silicone ayiphakeme kunezihlanganisi ezijwayelekile zemvelo ngokwamandla ekucindezelekeni okunamandla njengokumelana nokukhathala. Kodwa-ke, ukunqoba le nkinga, ama-rubbers angcono izikhathi eziphindwe kasishiyagalombili kuya kwezingama-20 ekumelaneni nokukhathala ayenziwa. Le mikhiqizo isetshenziswa kabanzi ezicini eziningi ezifana namakhibhodi wemishini ezisebenzelayo yasehhovisi kanye nezingxenye zenjoloba zezimoto zokuhamba.
Ukumelana Nemisebe Yemisebe:
Ama-rubbers ajwayelekile e-silicone (i-dimenthyl silicone rubbers) awakhombisi ukumelana okuhle nemisebe enemisebe ikakhulukazi uma kuqhathaniswa namanye ama-rubbers wemvelo. Kodwa-ke imethyl phenyl silicone rubbers, ne-phenyl radical efakwe kwi-polymer, inokumelana okuhle nemisebe ekhipha imisebe. Zisetshenziswa njengezintambo nezixhumi eziteshini zamandla enuzi.
Ukumelana Nentuthu:
Ama-rubbers we-Silicone anokumuncwa kwamanzi okuphansi okungaba yi-1% noma ngabe acwiliswa emanzini isikhathi eside. Amandla okuqina kwemishini nezakhiwo zikagesi cishe azithinteki. Ngokuvamile ama-rubbers abicah awoni uma uhlangana ne-steam, ithonya liba likhulu lapho ingcindezi yesitimu yanda. I-Siloxane polymer yephuka ngaphansi komusi onamandla aphezulu ngaphezu kuka-150oC. Lesi simo singalungiswa ngokwakhiwa kwenjoloba abicah, ukukhethwa kwama-vulcanizing agents kanye nokwelashwa kweposi.
Ukuqhuba kagesi:
Ama-rubbers kagesi abamba ugesi ayizinhlanganisela zenjoloba enezinto ezisebenza ngogesi ezifana nekhabhoni efakiwe. Imikhiqizo ehlukahlukene enokumelana kagesi kusuka ku-ohms-cm kuya ku-e + 3 ohms-cm iyatholakala. Ngaphezu kwalokho, ezinye izakhiwo nazo ziyaqhathaniswa nalezo ze-rubbers ejwayelekile ye-silicone. Ngakho-ke asetshenziswa kabanzi njengezindawo zokuxhumana zamakhibhodi, azungeze ama-heater futhi njengezinto zokuvala uphawu zezinto ezilwa ne-static nezintambo zamandla aphezulu. Ngokuvamile, ama-rubbers kagesi e-conductive kagesi atholakala emakethe ikakhulukazi lawo ane-resistivity yevolumu kagesi esukela ku-1 kuye ku-e + 3 ohms-cm.
Ukuminyaniswa Setha:
Lapho ama-rubbers abicah asetshenziswa njengezinto zenjoloba zokupakisha ezithola ukushuba okucindezelayo ngaphansi kwesimo sokushisa, amandla okululama abaluleke kakhulu. Iqoqo lokucindezelwa lama-silicone rubbers libekwe etafuleni ngobubanzi bamazinga okushisa kusuka ku -60oC kuye ku-250oC. Ngokuvamile ama-rubbers abicah adinga ukwelashwa kokuthunyelwe. Ikakhulu esimweni semikhiqizo yokukhiqiza enesethi yokuminyana ephansi. Ukwelashwa ngeposi kuyadingeka futhi ukukhethwa kwama-agent aphezulu wokuqhafaza kuyadingeka.
Ukuqhuba Okushisayo:
Ukuqhutshwa kokushisa kwe-rubber abicah kungu-0.5 e + 3 cal.cm.sec. C. Leli nani likhombisa ukuhanjiswa okushisayo okuhle kakhulu kwama-silicone rubbers, ngakho-ke asetshenziswa njengamashidi okusika wokushisa nama-rollers wokushisa.
Amandla aqine kakhulu nezinyembezi:
Ngokuvamile amandla wezinyembezi zerabha abicah angaba ngu-15kgf / cm. Kodwa-ke, imikhiqizo yokuqina namandla okwehla izinyembezi (30kgf / cm kuya ku-50kgf / cm) nayo yenziwa itholakale ngokwenza ngcono i-polymer kanye nokukhethwa kwama-fillers kanye nama-cross-linking agents. Le mikhiqizo isetshenziselwa kangcono ukukhiqiza ukubumba okuyinkimbinkimbi, okudinga amandla amakhulu wezinyembezi, izimbobo zesikhunta ezinama-reverse tapers nokubumba okukhulu.
Ukungenzeki:
Ama-rubbone abicah awashisi kalula yize edonswa eduze nelangabi. Kodwa-ke uma sebebambe umlilo, bavutha ngokuqhubekayo. Ngokufakwa komzuzu othwala amalangabi, ama-silicone rubbers angathola ukungasebenzi namandla okucisha.
Le mikhiqizo ayikhiphi intuthu noma amagesi anobuthi lapho isha, ngoba ayiqukethe noma yiziphi izinhlanganisela ze-halogen eziphilayo ezikhona kuma-rubbers wemvelo. Ngakho-ke ziyasetshenziswa ezintweni zikagesi zasendlini nasemishini yasehhovisi kanye nezinto zokwakha isikhala esivaliwe ezindizeni, ezitimeleni ezihamba ngaphansi nasendlini yokwakha. Ziba yimikhiqizo ebaluleke kakhulu ezicini zokuphepha.
Ukungena kwegesi:
Ulwelwesi lwama-silicone rubbers lunokungena okungcono kwamagesi nomhwamuko wamanzi kanye nokukhetha okungcono uma kuqhathaniswa nenjoloba ephilayo.
Ukusebenza komzimba:
Ama-rubbers abicah ngokuvamile ayenziwa ku-physiology. Futhi banezindawo ezinentshisekelo yokuthi azibangeli ukujiya kwegazi kalula. Ngakho-ke zisetshenziswa njengama-catheters, imicu engenalutho kanye nenhliziyo yamaphaphu yokufakelwa, imigomo, izitobha zenjoloba yezokwelapha namalensi wokuxilongwa kwe-ultrasonic.
Ukubonisa ngale kanye Nemibala:
Ama-rubbers ajwayelekile we-organic amnyama ngenxa yokufakwa kwekhabhoni. Ngokuqondene ne-silicone rubbers, kungenzeka ukuthi kukhiqizwe ama-rubbers asobala kakhulu ngokufaka i-silica enhle engakonakalisi ukubonakala kwangempela kwe-silicone.
Ngenxa yokubekwa obala okuhle kakhulu, umbala wombala ulula. Ngakho-ke imikhiqizo enemibala kungenzeka.
Izakhiwo ezinganamatheli Okungonakalisi:
Ama-rubbers abicah ayangena ngaphakathi kwamakhemikhali futhi anempahla enhle kakhulu ekhipha impahla. Ngenxa yalokho azonakalisi ezinye izinto. Ngenxa yale ndawo, zisetshenziswa njengemigqa ehleliwe yemishini yokwenza amakhophi, imiqulu yokuphrinta, amashidi njll.
Imininingwane engenhla kukholakala ukuthi ilungile kepha ayisho ukuthi ifaka konke. Njengoba izimo zomuntu ngamunye zithonya ukusetshenziswa komkhiqizo ngamunye, imininingwane ekuleli shidi ledatha ingabonakala njengesiqondisi kuphela. Kungumsebenzi kuphela wekhasimende ukuhlola izidingo zalo ngazinye, ikakhulukazi ukuthi izakhiwo ezicacisiwe zemikhiqizo yethu zanele ukusetshenziswa kwayo okuhlosiwe.
Isikhathi Iposi: Nov-05-2019