Polytetrafluoroethylene (PTFE) yog cov khoom siv hluavtaws tau tsim nyob rau xyoo 1930s thaum lub sijhawm kws tshuaj lom neeg tab tom sim tsim ib hom tshiab ntawm perfluorethylene-based refrigerant.
Polytetrafluoroethylene (PTFE) yog cov khoom siv hluavtaws ua yuam kev tau tsim nyob rau xyoo 1930s thaum lub sijhawm kws tshuaj lom neeg tau mob siab los tsim ib hom tshiab ntawm perfluorethylene-based refrigerant.Ntau dua li ua tiav cov chlorofluorocarbon, tus kws tshawb fawb tau xav tsis thoob thaum pom tias perfluorethylene siv hauv cov txheej txheem cuam tshuam nrog cov ntsiab lus hlau ntawm nws lub thawv thiab polymerized nyob rau hauv siab.Tsawg tshaj li kaum xyoo tom qab, cov khoom tshiab no tau muab faib rau hauv kev lag luam loj thiab nws thiaj li tau patented nyob rau hauv lub npe polymer®.Nws yuav yog lwm 20 xyoo ua ntej cov khoom siv no yuav ntaus lub lauj kaub kib thiab dhau los ua lub npe hu ua thawj txheej tsis-stick rau cookware, txawm li cas los xij.Qhov tseeb, cov khoom no tau siv rau ntau yam ntawm lwm lub hom phiaj thaum xub thawj.
Thaum Ntiaj Teb Tsov Rog II, PTFE tau siv los tiv thaiv kev khiav tawm ntawm cov khoom siv hluav taws xob los ntawm qhov chaw tsim los tsim thawj lub foob pob tawg hauv Asmeskas, lub hom phiaj dubbed li Manhattan Project.Qhov chaw no sawv cev rau ib qho khoom vaj khoom tsev zoo nkauj nrog ntau dua 2,000,000 square feet (609,600 sq. meters) nyob rau hauv lub tsev uranium hexafluoride.Tsis tsuas yog cov khoom no muaj tshuaj lom thiab corrosive nyob rau hauv nws tus kheej txoj cai, tab sis nws kuj tsim ib tug txaus ntshai gas hu ua hydrogen fluoride nyob rau hauv lub xub ntiag ntawm dej los yog dej vapor.Vim li no, PTFE tau siv los ua cov txheej txheem rau cov kav dej kom ua rau lawv cov ntaub ntawv pov thawj.
Cov khoom tshwj xeeb insulating ntawm cov khoom siv no ua rau nws siv hauv cov khoom siv hluav taws xob zoo tagnrho.Rau ib yam, nws yog non-conductive, ua rau nws resistant rau high hluav taws xob teb.Nws kuj tseem tiv taus dej, cua sov, thiab tshuaj lom neeg corrosion.Qhov tseeb, nws tseem siv los tsim cov khoom siv hauv chav kuaj thiab cov khoom siv uas tuaj yeem sib cuag nrog hydrofluoric acid, uas yuav txwv tsis pub yaj lwm cov ntaub ntawv, txawm tias iav.
PTFE kuj muaj cov khoom sib txhuam qis heev, uas tau qhia tias muaj kev sib txhuam coefficient.Qhov kev ntsuas no yog txheeb ze thiab sib txawv raws li cov ntaub ntawv coj mus rau hauv kev sib cuag los tsim lossis simulate kev sib txhuam.Nyob rau hauv cov nqe lus ntawm plastics, kev sib txhuam yog feem ntau pom tiv thaiv polished steel.Txhawm rau muab cov kev sib txhuam qis ntawm PTFE rau hauv qhov kev pom zoo, nws tsuas yog paub cov khoom siv hluavtaws uas cov ntiv taw ntiv taw ntawm gecko tsis lo.Qhov kev ua tau zoo no ua rau nws tsim nyog rau kev tsim khoom uas yuav tsum tau tiv thaiv kev sib txhuam, xws li cov iav thiab pob bearings.
Cov khoom no thaum kawg tau qhia rau cov tsev neeg Asmeskas los ntawm Marion Trozzolo, tus tsim ntawm Laboratory Plasticware Fabricators.Thaum Trozzolo tau tsim cov cuab yeej tshawb fawb polymer®-coated rau ntau xyoo, nws tau txais kev tshoov siab los ntawm tus kws tshaj lij Fab Kis uas pom tias nws muaj cov txheej txheem tsis zoo rau nws cov cuab yeej nuv ntses uas nws tom qab kho nws tus poj niam lub lauj kaub thiab lauj kaub nrog nws.Thaum qhov kev sim no coj mus rau kev tsim khoom noj khoom haus hu ua Tefal (T-Fal®) hauv Fab Kis hauv nruab nrab xyoo 1950, Trozzolo tau los ua thawj US tus tsim khoom ntawm polymer®-coated cookware.Qhov tseeb, "The Happy Pan," tau tsim tawm xyoo 1961, tau txais qhov chaw ntawm keeb kwm tseem ceeb hauv Smithsonian Institute thiab Trozzolo lub npe ntawm qhov sib txawv hauv Plastics Hall of Fame.
Post lub sij hawm: Sep-01-2020