Chubhu yeptfe yakagadzirwa nezvinhu zvipi?
Sumo yechigadzirwa
1,Chubhu yePtfeizita rimwe re polytetrafluoroethylene, chidimbu chechirungu ndi PTFE, (inozivikanwa se "Plastic King, Hara"), uye fomura yemakemikari ndeye -(CF2-CF2)n-. Polytetrafluoroethylene yakawanikwa netsaona muna 1938 naDr. Roy J. Plunkett muDuPont.'s Jackson Laboratory muNew Jersey, USA Paakaedza kugadzira chlorofluorocarbon itsva. Kana iri compound refrigerant. Zvigadzirwa zvechinhu ichi zvinowanzonzi "non-stick coating"; chinhu chepolymer chakagadzirwa chinoshandisa fluorine kutsiva maatomu ese ehydrogen mu polyethylene. Chinhu ichi hachipindi mumaacid, alkalis, uye organic solvents dzakasiyana-siyana, uye hachinyungudike mu solvents dzese. Panguva imwe chete, PTFE ine hunhu hwekudzivirira kupisa kwakanyanya, uye friction coefficient yayo yakaderera kwazvo, saka inogona kushandiswa senzira yekuisa mafuta, uye yavewo coating yakakodzera yemukati mehari dzisina kunamira nemapombi emvura.
Zvinhu zvechigadzirwa ichi zvinonyanya kushandiswa pazvigadzirwa zvinotevera:
PTFE, FEP, PFA, ETFE, AF, NXT, FFR.
PTFE: PTFE (polytetrafluoroethylene) chifukidziro chisina kunamira chinogona kushandiswa nguva dzose pa 260°C, ine tembiricha yepamusoro yekushandisa ye290-300°C, ine mwero wekukweshana wakaderera zvakanyanya, inodzivirira kupfeka zvakanaka uye ine kugadzikana kwakanaka kwemakemikari.
FEP: FEP (fluorinated ethylene propylene copolymer) inonyunguduka uye inoyerera kuti igadzire firimu risingapindi maburi panguva yekubika. Ine kugadzikana kwakanaka kwemakemikari uye hunhu hwakanaka hwekusanamatira. Tembiricha yepamusoro yekushandisa i200℃.
PFA: PFA (perfluoroalkyl compound) inonyunguduka uye inoyerera panguva yekubika kuti igadzire firimu risina maburi seFEP. Chakanakira PFA ndechekuti ine tembiricha yakakwira yekushandiswa nguva dzose ye260°C, kuomarara kwakasimba uye kusimba, uye inonyanya kukodzera kushandiswa mukushandiswa kwekudzivirira kunamira uye kudzivirira makemikari mumamiriro ekupisa kwakanyanya.
PTFE (Polytetrafluoroethene) chinhu chepolymer chakagadzirwa chinoshandisa fluorine kutsiva maatomu ese ehydrogen mu polyethylene. Chinhu ichi hachipindi mumaacid, alkalis, nezvimwe zvinonyungudutsa zvakasikwa, uye hachinyungudike muzvinhu zvese zvinonyungudutsa. Panguva imwe chete, chubhu yeptfe ine hunhu hwekudzivirira kupisa kwakanyanya, uye coefficient yayo yekukweshana yakaderera kwazvo, saka inogona kushandiswa pakukwiza mafuta, uye yavewo chifukidziro chakakodzera chewoks nemapombi emvura zviri nyore kuchenesa. Inogona kushandiswa pakudzivisa ngura yemapaipi, kudzivirira kupisa kwakanyanya uye kwakaderera, uye kudzivirira ngura. Inoshandiswa munzvimbo dzakaoma dzakadai sekukwiza mafuta, mainjiniya, zvemagetsi, midziyo yemagetsi, uye ndege.
Zvimiro zvechigadzirwa
1. Kudzivirira kupisa kwakanyanya uye kwakaderera: kushoma pane tembiricha, tembiricha yakakura, tembiricha inoshanda -65~260℃.
2、Hainamati: Zvinhu zvinenge zvese hazvina kusungirirwa kufirimu rePTFE. Mafirimu matete anoratidzawo kushanda kwakanaka kwekusapindirana. 2. Kudzivirira kupisa: Firimu rePTFE rinofukidza rine kudzikamisa kupisa kwakanaka uye rinodzivirira kupisa kwakaderera. Rinogona kutsungirira kupisa kwakanyanya kusvika 300°C munguva pfupi, uye rinogona kushandiswa nguva dzose pakati pe240°C ne260°C. Rine kugadzikana kwakanyanya kwekupisa. Rinogona kushanda pakupisa kwechando pasina kupwanyika uye harinyungudike pakupisa kwakakwirira.
3. Hunhu hwekutsvedza: Firimu rePTFE rine coefficient yakakwira yekutsvedza. Coefficient yekutsvedza inochinja kana mutoro uchitsvedza, asi kukosha kwacho kuri pakati pe0.05-0.15 chete.
4、Kudzivirira hunyoro: Pamusoro pefirimu rePTFE rinonamira pamvura nemafuta, uye hazvisi nyore kunamira pamhinduro panguva yekugadzira. Kana paine tsvina shoma, ingoipukuta. Nguva pfupi inoraswa, zvichichengetedza maawa ekushanda uye zvichivandudza kushanda zvakanaka kwebasa.
5、Kudzivirira kupfeka: Ine simba rakanaka rekuramba kupfeka kana yakaremerwa zvakanyanya. Kana yakaremerwa zvakanyanya, ine mabhenefiti maviri ekudzivirira kupfeka uye kusapindira.
6、Kuramba ngura: PTFE hainyatso ngura nemakemikari, uye inogona kutsungirira maacid ese akasimba (kusanganisira aqua regia) uye ma oxidants akasimba kunze kwesimbi dzakanyungudutswa dzealkali, fluorinated media uye sodium hydroxide pamusoro pe300°C. Basa rekuderedza ngura uye organic solvents dzakasiyana-siyana zvinogona kudzivirira zvikamu kubva kune chero rudzi rwengura yemakemikari.
hunhu hwemakemikari
1、Kudzivirira: Hazvikanganiswi nemamiriro ekunze uye maitikiro, kuramba kwevhoriyamu kunogona kusvika 1018 ohm·cm, kurasikirwa kwe dielectric kudiki, uye voltage yekuputsika kwakakwira.
2、Kudzivirira kupisa kwakanyanya uye kwakaderera: kusanyanya kukanganisa tembiricha, tembiricha yakakura, tembiricha inoshanda -190~260℃.
3、Inozvizora yega: Ine diki diki yekukweshana pakati pemapurasitiki uye chinhu chakanakira chekuzora chisina mafuta.
4. Kusanamatira pamusoro: zvinhu zvakasimba zvinozivikanwa hazvigoni kunamira pamusoro, chinhu chakasimba chine simba diki pamusoro.
5、Kudzivirirwa kwemamiriro ekunze, kuramba mwaranzi uye kupindira kwakaderera: kuratidzwa kwenguva refu mumhepo, pamusoro uye mashandiro azvo hazvichinji.
6、Kusapisa: Muganho weokisijeni uri pasi pe90.
7、PTFE inoshandiswa zvakanyanya mumaindasitiri anoda kusimba kwekupisa kwakanyanya uye kusimba kwakanyanya. Super acid-fluoroantimonic acid yakasimba inogona kushandiswawo kuchengetedza
Nzvimbo yekushandisa chigadzirwa
Polytetrafluoroethylene inogona kugadzirwa nekusundidzira kana kuburitsa; inogonawo kugadzirwa kuita firimu uye yozochekwa kuita PTFE tepi yakaiswa mushaft kana ikashandiswa muwaya dzinopisa zvakanyanya. Inoshandiswa kugadzira tambo dze high-frequency uye inogadzirwa zvakananga mukupararira kwemvura. Inogona kushandiswa pakuputira, kuisa mudumbu kana kugadzira fiber.
Polytetrafluoroethylene inoshandiswa zvakanyanya mumaindasitiri akadai sesimba renyukireya, dziviriro yenyika, ndege, zvemagetsi, zvemagetsi, zvemakemikari, zvemichina, zvekushandisa, zvemita, zvekuvaka, zvemachira, zvekurapa pamusoro pesimbi, zvemishonga, zvekurapa, zvekudya, zvesimbi uye zvekunyungudutsa, nezvimwewo. Zvinhu zvinoora, zvekudzivirira kupisa, zvekudzivirira kunamira, nezvimwewo zvinoita kuti ive chigadzirwa chisingatsiviwi.
Hosipa yePTFEIne hunhu hwakanaka kwazvo hwakakwana, inodzivisa kupisa kwakanyanya, inodzivisa ngura, hainamati, inozvizora yoga, ine hunhu hwakanaka hwe dielectric, uye ine coefficient yakaderera yekukweshana. Inoshandiswa semapurasitiki einjiniya, inogona kugadzirwa kuita machubhu ePTFE, tsvimbo, mabhandi, maplate, mafirimu, nezvimwewo. Inowanzo shandiswa mumapaipi anodzivirira ngura, magaba, mapombi, mavharuvhu, radar, michina yekukurukurirana ine frequency yakakwira, michina yeredhiyo, ma radomes, nezvimwewo zvine zvinodiwa zvepamusoro. Kuwedzera chero filler inogona kutsungirira tembiricha yekupisa ye polytetrafluoroethylene, hunhu hwayo hwemakanika hunogona kuvandudzwa zvakanyanya. Panguva imwe chete, mamwe hunhu hwakanaka hwePTFE hunochengetwa. Mhando dzakazadzwa dzinosanganisira girazi fiber, simbi, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, nezvimwewo. Kudzivirira kwekusakara uye muganho wePV kukosha kunogona kuwedzerwa ne1000 times
Kutsvaga kwakabatana ne ptfe hose:
Nguva yekutumira: Ndira-07-2021