Lub cev & Mechanical Properties ntawm Filled PTFE

PTFEmuaj nyob rau hauv ntau qib sib txawv xws li Virgin PTFE, Chemically Modified PTFE, Carbon Filled PTFE, Iav Filed PTFE, Carbon / Coke Filled PTFE, Graphite Filled PTFE, Bronze Filled PTFE, Bronze + Molybdenum Disulphide Filled PTFE, Aluminium Oxideum Filled PTFE. Filled PTFE, Stainless Steel Filled PTFE, Mica Filled PTFE, Iav + MoS2 Sau PTFE, MoS2 Filled PTFE, Tshuaj Kho Mob PTFE thiab lwm yam.

Kev sib cuag ntawm ob qhov zawv zawg qhov rooj, vim tias qhov kev sib txhuam uas tsis tuaj yeem tsim nyob rau hauv qhov chaw sib cuag, ua rau muaj qee yam hnav uas nws qhov loj yog nyob ntawm kev thauj khoom, ceev thiab lub sijhawm ntawm kev sib cuag zawv zawg.Raws li txoj cai, ntawm cov kev txwv no thiab qhov tshwm sim hnav tshwm sim muaj kev sib raug zoo rau:

R = KPVT

qhov twg, qhia nyob rau hauv lub ntsuas units ntawm lub rooj: R = hnav nyob rau hauv mmP = tshwj xeeb load nyob rau hauv N / mm2 (xa mus rau saum npoo - Ø xl - nyob rau hauv cov ntaub ntawv ntawm bushes, txiv mis, thiab lwm yam) V = zawv zawg ceev nyob rau hauv m / secT = lub sij hawm nyob rau hauv teevK = hnav qhov tseem ceeb hauv mm3 sec/Nmh.

Tus nqi ntawm qhov tseem ceeb PV tom qab uas cov coefficient ntawm hnav poob nws tus cwj pwm linear, piv txwv li muaj txiaj ntsig zoo nrog lub cev dhau los ntawm qhov tsis muaj zog mus rau qhov hnyav hnav, hu ua "PV txwv".Qhov kev txwv PV no thiab qhov hnav zoo yog, yog li ntawd, cov yam ntxwv ntawm txhua yam khoom siv.Hauv kev xyaum, txawm li cas los xij, nws tuaj yeem pom tau yooj yim, qhov hnav thiab PV txwv ntawm tib cov khoom ntim tuaj yeem sib txawv nrog qhov xwm txheej, qhov nyuaj thiab qhov kawg ntawm lwm qhov kev sib cuag "tus khub" nrog lub xub ntiag, lossis tsis, ntawm cov dej txias thiab/los yog lubricating kua.

Deformation nyob rau hauv load thiab compressive zog PTFE, zoo li feem ntau lwm yam ntaub ntawv yas, tsis muaj "elastic cheeb tsam" qhov twg tus piv load/deformation (Young modulus) muaj ib tug tas li tus nqi.Qhov piv txwv no load / deformation nyob ntawm lub sij hawm ntawm daim ntawv thov ntawm lub load thiab cov deformations tom qab;Qhov tshwm sim no yog hu ua "creep", thiab thaum tshem tawm ntawm lub load, tsuas yog ib feem ntawm lub deformation rov qab mus rau lub qub xeev ("elastic rov qab"), yog li ntawd peb yeej ib txwm nyob rau hauv lub xub ntiag ntawm ib tug "deformation mus tas li". ”.

Creep, pom tseeb tsis yog ib qho kev ua haujlwm ntawm lub sijhawm, tau tshwm sim tom qab tsuas yog 24 teev hauv kev deformations uas feem ntau tsis suav nrog.Nrog rau qhov kub nce, muaj qhov poob ntawm qhov deformation nyob rau hauv cov khoom thauj khoom thiab yog li ntawm lub zog compressive uas twb nyob ntawm 100 ° C sib npaug rau 1/2 ntawm qhov ntawd ntawm 23 ° C thiab ntawm 200 ° C txog 1/10th.

Txawm li cas los xij, PTFE thiab tshwj xeebpuv PTFE, yog ib qho ntawm cov ntaub ntawv yas khaws cia, ntawm qhov kub thiab txias, qhov zoo tshaj plaws deformation zog nyob rau hauv load.Los xaus, qhov elastic rov qab nyob rau hauv li ntawm 50% ntawm deformations nyob rau hauv load, thiab mus tas li deformations yog sib npaug li 50% ntawm deformations nyob rau hauv load.

Qhov no siv tau rau ob qho tib si rau PTFE thiab tsis tau sau.Cov khoom ntawm thawj yog txawm li cas los txiav txim siab superior.Qhov tseeb, lub deformation nyob rau hauv load ntawm ntau hom PTFE puv yog hais txog 1/4 ntawm cov unfilled sawv daws yuav, thaum lub compressive zog yog hais txog ob.

Thermal Properties ntawm Filled PTFE

Lub thermal expansion ntawm PTFE puv yog nyob rau hauv feem ntau inferior rau cov unfilled PTFE thiab ib txwm ntau dua nyob rau hauv cov kev taw qhia ntawm molding tshaj crosswise.Lub thermal conductivity yog superior rau ntawm PTFE unfilled, tshwj xeeb tshaj yog thaum siv fillers muaj siab thermal conductivity ntawm lawv tus kheej.

Sau PTFE yog li ntawd muaj cov khoom thermal zoo dua li cov uas tsis tau sau.

Hluav taws xob cov khoom ntawm Filled PTFE

Cov khoom no nyob ntawm ntau qib raws li qhov xwm txheej ntawm qhov muab tub lim.Tsuas yog PTFE ntim nrog iav fiber ntau muaj cov khoom zoo dielectric, txawm tias txawv ntawm cov PTFE uas tsis muaj dej.Piv txwv li, lub ntim thiab nto resistivity, qhov dielectric tas li thiab qhov dissipation yam txawv heev nrog cov variation ntawm humidity thiab zaus.