Waati PTFE nɔrɔlan min bɛ funteni caman na, o bɛ kɛ baarakɛminɛnw na minnu bɛ kɛ ni tension sabatilen ye, ka fanga minɛ, walima ka doni siri tuma bɛɛ – i n’a fɔ ka insulasi minɛ a nɔ na pipe funteniman kan, walima ka kɛ i n’a fɔ jɔli sirilan degun basigilen kɔnɔ – gɛlɛya dogolen dɔ bɛ se ka bɔ kɛnɛ kan: creep.
Creep ye fɛn dɔ bɔgɔbɔli ye dɔɔnin dɔɔnin, min bɛ to senna doni basigilen kɔrɔ waati kɔnɔ. Ni so funteni ye, a bɛ se ka kɛ i n’a fɔ PTFE kaseti bɛ sabati. Nka ni 200°C walima hali 260°C – a baarakɛcogo danma – nɔrɔlan bɛ se ka nɔgɔya ani ka woyo, wa PTFE substrat bɛ se ka 'jibɔ nɛnɛ' kɛ (ka wuli a wuliyɔrɔ jukɔrɔ).
Aokai PTFE ye creep kɛcogo kɔrɔbɔ sanga ba caman kɔnɔ. Nin barokun in b’a ɲɛfɔ cogo min na creep bɛ jateminɛ, cogo min na nɔrɔlan ni substrat kelen-kelen bɛɛ bɛ dɛmɛ don, ani kaseti jɔli jumɛnw bɛ creep kɛlɛ ka ɲɛ.
Creep ye mun ye PTFE Tape kɔnɔ – Dimensions fila
Creep (kɔrɔbɔli) bɛ Fɔ kosɛbɛ fɛnw ka jaabi viskoelasitiki ma. Nɔrɔlan ni substrat bɛ baara kɛ fɛɛrɛ wɛrɛw fɛ, o bɛɛ n’a ta, u fila bɛɛ bɛ nɔba bila deformation resistance bɛɛ lajɛlen na.
Baarakɛcogo gɛlɛya : PTFE kasɛtiw ka teli ka doni basigilenw sɔrɔ 200-260°C la, o ka ca ni nɔrɔlan kɔrɔw dan ye minnu bɛ se ka degun. Sɛgɛsɛgɛli janyalen min bɛ kɛ funteni caman na, o de ka kan.
Adhesive Layer Properties – Silikoni PSA
PTFE nɔrɔlan fanba bɛ nɔrɔlanw ta minnu bɛ kɛ ni silikɔni ye, minnu bɛ se ka degun, minnu ka wuli ka bɔ funteni caman na, o bɛ bɔ nin ko ninnu de la:
MW ka bon, fenili silikoni ka ɲɛsin funteni caman ma
Fasa fanga bonya (misali la, silika fumed) .
A bɛ jɛɲɔgɔnya fanga bonya kosɛbɛ, a bɛ se ka kɛ sababu ye ka elastic rebound (i n’a fɔ lastikuw) vs. viscous flow (i n’a fɔ chewing gum)
Aw bɛ 5-15% fara a kan min bɛ fanga di a ma
Adhesive coating ka bonya
Layer thicker bɛ sira di shear slippage caman ma → creep sanfɛ doni kelen kɔrɔ
Aw bɛ finimugu finmanw kɛ, minnu bɛ kɛ kelen ye, walasa ka fɛnw kɛ minnu bɛ se ka sɔgɔsɔgɔ kɛlɛ
Nɔrɔli (adhésion interfaciale) ye
Jɛɲɔgɔnya jugu bɛ kɛ sababu ye ka nɔrɔlenw bɔ substrat la → interfacial slippage (a tɛ bulk creep ye) .
Aw bɛ silikoni daminɛ kɛ, aw bɛ aw jija a yɔrɔ saniyalen don
Fɛn min bɛ taa ni a ye: Silicone adhesive min ma tigɛli kɛ duguma, o bɛ tɔɔrɔ teliya la creep failure ni funteni kɔrɔtalen don. Premium anti-creep tapes bɛ baara kɛ ni silikoni ye min ka bon ni crosslink-density ye ni fasa barikamaw ye ani ni finimugu finmanw ye minnu bɛ kɔrɔsi.
Aokai PTFE kase min bɛ funteni caman bɔ, o bɛ baara kɛ ni silikoni PSA ye min bɛ se ka ɲɔgɔn cɛ kosɛbɛ ni silisi fanga bonya ye min bɛ sisi. Sɛgɛsɛgɛli yɛrɛmahɔrɔnyalen min bɛ kɛ ka sɔgɔsɔgɔninjɛ jɔ 260°C la (doni 1000g, milimɛtɛrɛ 12,5×25 bɛ ɲɔgɔn dafa) o bɛ sanga >150 jira fo ka se dɛsɛ ma – a bɛnnen don doni basigilenw kɛli ma minnu bɛ funteni caman ɲini.
Substrat Properties – Fibre de verre coté PTFE vs. Film PTFE saniyalen
Substrat mainstream fila bɛ kɛ PTFE kasɛtiw kama, ni creep baarakɛcogo tɛ kelen ye kosɛbɛ:
Substrat suguya
Creep (kɛrɛnkɛrɛnnenya la) Resistance
Fɛɛrɛ min bɛ Kɛ
Film PTFE saniyalen
Faantan – a ka teli ka dɔn kosɛbɛ nɛnɛ bɔli (cold creep). Hali ni doni basigilen nɔgɔmanw bɛ yen minnu ka dɔgɔn kosɛbɛ funteni hakɛ (327°C) jukɔrɔ, fɛnɲɛnɛmaba min tɛ Se ka Lasegin, o bɛ Kɛ k’a sababu Kɛ molekiyɔmu cakɛda sɔgɔli ye.
Fibre de verre fini min falen don PTFE la (a ka ca ni kaseti ye min ka funteni ka bon) .
A ka ɲi kosɛbɛ – fibreglasi kolosinsinnan min dilannen don, o bɛ PTFE nɛnɛ bɔli bali kosɛbɛ
Jatebɔ jɛlen : gilasi fiyɛw bɛ doni ta, PTFE bɛ doni di min tɛ nɔrɔ
Ni fibreglasi-reinforced substrate don, creep resistance bɛ dɔn ni:
Fɛn
Nɔ
Weave density ani a janya
Fini minnu ka bon, minnu girinya ka bon → modulu de tensile ka bon → creep dɔgɔman
Modified falen PTFE
Fɛn minnu bɛ fara a kan (fibre de verre mugu, grafite, fibre carbone) bɛ PTFE molekiyɔmuw lamagacogo bali → u bɛ substrat rigidity ni creep resistance bonya
Fabriki furakɛli & impregnation dafalen
PTFE sintered pewu min bɛ fibre de verre siri pewu, o bɛ kɛ composite intégré ye walasa ka a yɛrɛ tanga interlayer shear slip ma. Impregnation inficient → PTFE tolen min bɛ finiw kɔnɔ, o bɛ wuli doni kɔrɔ
Substrat ka bonya & a ka flakɛ
Substrats thick, uniformly flat → flexural rigidity high → hali stress distribution → bɛ localized premature creep bali ka bɔ degun hakɛ la
Fɛn minnu bɛ taa ni u ye : Ni aw bɛ doni ta tuma bɛɛ funteni caman na, aw kana PTEF filimu kase saniyalen kɛ abada – a bɛna wuli ka wuli cogo la min tɛ se ka wuli. Aw bɛ sugandi tuma bɛɛ PTFE kasɛti min barika ka bon ni fibreglasi ye, o .
Kuma surun – Cogo min na ka creep resistance sabati PTFE Tape kɔnɔ
Fɛn
Fɛn min ka kan ka ɲini
Fɛn minnu ka kan ka kɔlɔsi
Nɛgɛ suguya
Silikoni PSA min ka bon ni silika fasa ye min bɛ kɛ ni sisi ye
Silikoni min ma tigɛli kɛ duguma, PSA acrylique (a bɛ wuli ni funteni dɔgɔman ye) .
Nɛrɛmuguma ka bonya
A finimugu finman, a bɛ kɛ kelen ye (laɲini milimɛtɛrɛ 0,02-0,05) .
Nɔrɔlan belebeleba (>0,08 mm) – a bɛ a to sɔgɔsɔgɔninjɛ ka sɛgɛn
Weave loose, impregnation insuffisant, a yɔrɔ dɔ sintered
Jɛɲɔgɔnya min bɛ kɛ ni ɲɛda ni ɲɔgɔn cɛ
Primer furakɛli bɛ kɛ nɔrɔlen ni substrat cɛ
Primer → adhesive peeling tɛ kɛ sanni ka bulk creep kɛ
Ladilikan nafama: Ni doni bɛ kɛ tuma bɛɛ funteni caman na (misali la, pipe insulation wrap under tension, components holding on heated plates), aw bɛ static shear data ɲini aw ka funteni ni doni kɛrɛnkɛrɛnnen na. Aw bɛ PTFE kaseti ɲɛfɔ min barika ka bon ni fibre de verre ye, aw kana filimu kaseti fɔ. Aw bɛ a lajɛ ni nɔrɔlan ye silikoni ye min ka bon ni fasa ye.
Kuma surun na , PTFE kasɛti nɔrɔlen min bɛ funteni caman na, o ka sɛgɛnbaliya doni basigilen kuntaalajan kɔrɔ, o bɛ bɔ fɛn fila de la. Silikoni PSA layini ka kan ka kɛ ni crosslink density caman ye, ka kɛ ni fillers reinforcings (silica fumed), ani ka finimugu finman kelen ye walasa ka viscous flow bali. Substrat ka kan ka kɛ PTFE ye min barika ka bon ni fibreglasi ye – PTFE filimu saniyalen bɛna nɛnɛ jiginni kɛ min tɛ se ka wuli ka bɔ a nɔ na funteni caman na. Fibreglasi kolo bɛ doni ta ani ka fɛnɲɛnamafagalan to a hakɛ la.
Ni aw bɛ PTFE kaseti sugandi ka kɛ doni basigilenw ye funteni caman na, aw kana aw yɛrɛ sigi abada PTFE filimu kase saniyalen na. Aw bɛ to ka static shear data ɲini aw ka baarakɛcogo funteni na. Ani aw k’aw hakili to a la: jɛɲɔgɔnya min bɛ nɛgɛ ni substrat cɛ, o fana nafa ka bon – fɛnɲɛnamafagalan minnu furakɛra ni primer ye, olu bɛ fɛnw sɔgɔli bali.
Aw mago bɛ PTFE kaseti la min bɛ se ka sɔgɔsɔgɔ walasa ka doni basigilen doni funteni caman na wa? Aokai PTFE bɛ kase di min barika ka bon ni fibreglasi ye ni silikoni PSA ye min ka bon ni crosslink-density ye, min tiɲɛna ni 260°C static shear testing ye. Aw ye anw sɔrɔ ni aw ka doni, funteni ani waati janya wajibiyalenw ye.
Ni aw mago bɛ fɛn wɛrɛw la, baarakɛcogo ɲɛjiralanw, ani furaw labɛncogo la an ka fɛn dilannenw bɛɛ lajɛlen kama i n’a fɔ PTFE fini min bɛ funteni caman bɔ, PTFE kasɛti nɔrɔlen, PTFE mesh conveyor belt, seamless fuser belt, single-sided PTFE fabric, high-temperature resistant conveyor belt and heat-resistant fibreglass fini , aw kana siga ka anw sɔrɔ:
