Qhov siab heev yaj viscosity ntawm cov dej tsis muaj dej thiab ua tsis taus pa yog qhov laj thawj tseem ceeb vim li cas nws tuaj yeem siv tau rau qhov kub thiab txias heev.
Waterproof thiab breathable membrane PTFE yog ib tug heev crystalline polymer, thiab nws cov ntaub ntawv raw crystallinity tuaj yeem ncav cuag 92 feem pua rau 98 feem pua. Txawm li cas los xij, tom qab ua tiav lossis sintering-txias, cov crystallinity raug txo kom tsis pub ntau tshaj 7{10}} feem pua ntawm cov crystallinity nyoos. Thaum PTFE nyob ntawm 19 degree, nws nthuav tawm qhov chaw helical conformation nyob rau hauv uas txhua txhua 13 txuas rotate 180 degree. Saum toj no 19 degree, tus naj npawb ntawm cov chain units yuav tsum tau rau tib lub rotation ntawm 180 degree nce mus rau 15, vim hais tias qhov kev ncua deb ntawm txhua saw yog 0.195nm. Qhov kev hloov pauv no txhais tau hais tias qhov nyuaj ntawm cov hmoov nplej sib txawv hauv qab thiab siab dua 19 degree. Thaum qhov kub siab tshaj 19 degree, daim ntawv cog lus muaj qee qhov kev hloov pauv ntawm lub kaum sab xis, thiab qhov kev hloov pauv no yuav nce nrog qhov nce ntawm qhov kub; Thaum qhov kub siab tshaj 30 degree, qhov nyiam ntawm qhov kev hloov pauv ntawm lub zog no yuav nce ntxiv mus txog thaum nws nce mus txog 327 degree. Qhov no txhais tau hais tias cov khoom yog softer thiab yooj yim deformed saum 19 degree. Qhov no muaj kev taw qhia tseem ceeb heev rau kev xaiv cov txheej txheem tom qab kho ntawm PTFE resin, hom kev txav ntawm cov ntaub ntawv ntawm cov kab sib dhos thiab tsim cov khoom siv, kev txiav txim siab ntawm txoj kev ntim khoom thiab qhov kub thiab txias. Txoj kev ncab siv los ua cov yeeb yaj kiab kuj ua lub luag haujlwm tseem ceeb hauv kev xaiv qhov kub thiab txias.
Thaum qhov ntsuas kub qis dua 19 degree, lub xeev siv lead ua ntawm PTFE yog triclinic siv lead ua lattice. Nyob rau ntawm 19 degree, cov ntaub ntawv siv lead ua hloov pauv, kev sib hloov ntawm cov saw ntu ua me me, thiab chav tsev lattice hloov mus rau hauv hexagonal crystal system. Thaum 30 degree, PTFE crystals undergo crystallization so, thiab kev sib hloov ntawm daim ntawv cog lus ua random winding. Ob qhov ntsuas kub no feem ntau yog hu ua theem hloov pauv cov ntsiab lus.
Lub siab crystallinity thiab siab molecular hnyav ntawm PTFE cob rau waterproof thiab breathable daim nyias nyias ua rau tsis tshua muaj melt viscosity ntawm PTFE. Lub kinematic viscosity ntsuas ntawm 380 degree yog 1010 ~ 1011Pa.s, thiab nws tsis muaj fluidity ntawm lub melting point kub. Yog li ntawd, zoo tib yam PTFE resin tsis tuaj yeem ua tiav los ntawm kev ua cov txheej txheem feem ntau haum rau cov khoom siv yaj. Suspended PTFE resin tsuas tuaj yeem ua tiav los ntawm txoj kev zoo ib yam li cov hmoov metallurgy, uas yog, tshem tawm PTFE resin hmoov yog muab tso rau hauv pwm thiab preformed los ntawm compression kom disperse PTFE resin. Nws yog ib qho tsim nyog yuav tsum tau ntxiv ib lub zog (lubricant) los ua ib qho tshuaj txhuam kom thawb lub preform, thiab lawv yuav tsum tau sintered los ua ib yam khoom.