PTFE yog qhov nyuaj rau pwm thiab txheej txheem thib ob.PTFE khoomNws muaj qhov loj me me thiab cov viscosity siab heev, yog li nws tsis tuaj yeem siv rau hauv cov txheej txheem thib ob xws li txhaj tshuaj molding thiab calendering, uas feem ntau siv rau cov yas.PTFE pas nrig ram extruder ua tau raws li qhov xav tau ntawm kev ua.Yog li vim li cas PTFE nyuaj rau txheej txheem?
1. Cov khoom siv tsis zoo thiab lub peev xwm thauj khoom.Lub zog txhua yam ntawm PTFE tsuas yog 14 txog 25 MPa, tsis muaj resilience, tab sis qhov tawg elongation yog loj.Lub coefficient ntawm linear expansion yog loj.Hauv -50 ~ 250 ℃, PTFE linear expansion coefficient ntawm 1.13 × 10-4 ~ 2.16 × 10-5 / ℃, yog 13 npaug ntawm cov hlau.Yog li ntawd, nws yog ib qho yooj yim rau deform, tawg, thiab lwm yam tshwm sim nrog rau lwm yam ntaub ntawv.
2. Tsis zoo thermal conductivity.Thermal conductivity ntawm tsuas yog 0.24kcal / (mh-℃), yooj yim ua rau thermal expansion, thermal qaug zog, thiab thermal deformation.
3. Tsis zoo creep kuj, yooj yim rau txias txaus.PTFE nyob rau hauv lub sij hawm ntev lub luag hauj lwm ntawm load, creep yog loj dua, thiab nquag mus rau txias txaus tshwm sim.Tsis zoo abrasion tsis kam,PTFEcov khoom hardness yog tsawg, thiab abrasion loj.Thaum lub load (P) thiab zawv zawg ceev (V) tshaj tej yam kev mob, nws cov kev sib txhuam hnav ua loj.Tus nqi PV yog li qee qhov txwv hauv daim ntawv thov thiab cov nqi tsim khoom yog siab.Cov teeb meem saum toj no ntawm PTFE txwv nws daim ntawv thov, txhawm rau txhim kho nws cov kev ua tau zoo.Kev tshawb fawb ntawm PTFE hauv tsev thiab txawv teb chaws tau tsom mus rau kev nrhiav cov kev tsim nyog los hloov kho nws, yog li txhim kho nws cov kev ua tau zoo rau qee yam thiab nthuav dav nws cov kev siv ntau yam.
4. Nws kuj muaj kev tiv thaiv zoo rau qhov kub thiab txias, uas ua rau nws tau siv dav hauv cov ntawv thov xws li kev tsim cov lauj kaub uas tsis yog-stick rau cov hom phiaj tiv thaiv.Qhov saum npoo ntawm PTFE molecule yog tag nrho qhwv los ntawm fluorine atoms thiab yog li ntawd muaj ib tug uas tsis yog-stick cim, uas ua rau nws nyuaj rau daim ntawv cog lus los ntawm cov pa txoj kev.Cov txheej txheem los tiv thaiv nplaum muaj ob hom tseem ceeb: mounting PTFE qhov chaw los yog cov nplooj ntawv ntawm substrate thiab tshav kub-shrinkingPTFE txheejlos yog lacquered ntaub laminated nrog iav mus rau substrate.
Post lub sij hawm: Dec-09-2022