Cooling Rate Nsunsuanso wɔ PTFE Tape so

Sɛ́ obi a ɔyɛɛ PTFE teyp a ɛyɛ hyew kɛse no, Jiangsu Aokai New Materials nam eyi so kyerɛkyerɛ nkɛntɛnso a akwan a wɔfa so yɛ onwini ne onwini dodow nya wɔ PTFE teyp a ɛyɛ hyew a wɔasa no yare no adwumayɛ so no mu kɔ akyiri.

I. Essence of PTFE Crystallization Su ne Cooling Rate Mmara

PTFE substrate a cured high-temperature tape yɛ semi-crystalline polymer dea, a ɛfa crystallization ntɛmntɛm bere a onwini bere a sintering akyi. Ne titiriw no, onwini dodow ne core process parameter a wɔde di PTFE high-temperature tape no crystallinity so: onwini a ɛyɛ brɛoo no ma crystallinity a ɛkorɔn ba, bere a onwini a ɛyɛ ntɛmntɛm no ma crystallinity a ɛba fam ba.

II. Nkɛntɛnso a Slow Cooling Nya wɔ PTFE High-temperature Tapes so

Nkɛntɛnso a Ɛwɔ Mu Nhyɛso So  Onwini a ɛba brɛoo no betumi atew ɔhyew mu nhyɛso a aka wɔ teyp no mu no so yiye. Sɛ wɔma teyp no yɛ nwini wɔ awosu mu wɔ fononoo no mu a, PTFE matrix ne glass fiber skeleton no wɔ bere a ɛdɔɔso a wɔde besiesie nsonsonoe a ɛwɔ shrinkage mu denam molecule chain relaxation so, na wɔkwati mpɔtam hɔ nhyɛso dodow.

Adeyɛ a wɔagye atom kɛse ne sɛ wɔbɛma teyp no ayɛ nwini wɔ awosu mu wɔ fononoo no mu akodu 150–200°C ansa na wɔayi afi adi ama mframa ayɛ nwini. Saa adeyɛ a ɛma onwini brɛoo yi tew emu nhyɛso so yiye na esiw coating delamination ne mpaapaemu ano.

Nkɛntɛnso a ɛwɔ Dimensional Stability so  Onwini a ɛyɛ brɛoo ma dimensional stability tu mpɔn kɛse. Bere a onwini brɛoo no, PTFE molecule nkɔnsɔnkɔnsɔn hyehyɛ ma ɛyɛ daa crystal lattices sɛnea ɛsɛ, na ɛyɛ crystallinity a ɛkorɔn ne crystal grains a ɛkɔ anim yiye, a ɛma wonya nsusuwii a etwa to a ɛyɛ den.

Ɔhyew a ɛtwetwe kakra bɛba wɔ ɔhyew a ɛkɔ soro ase wɔ dwumadie ankasa mu, enti wɔkamfo kyerɛ sɛ wɔmfa 1%–2% margin nsie bere a wɔde redi dwuma no. Onwini a ɛba brɛoo no ma wotumi shrinkage a ɛkɔ so daa a residual deformation kakraa bi na ɛwɔ hɔ.

Nkɛntɛnso a ɛwɔ Adhesive Adwumayɛ so  Onwini a ɛba brɛoo no nya nkɛntɛnso abien wɔ adhesion agyapade so. Ɔkwan biako so no, ɛma adhesive layer no tumi wie cross-linking ne stress relaxation koraa, na ɛma bonding ahoɔden a ɛyɛ den no kɔ so tra hɔ. Ɔkwan foforo so no, crystallinity a ɛkorɔn ma PTFE substrate no ani a ɛyɛ den no kɔ soro, na ɛde nhyɛso a ɛyɛ den ba bonding interface so wɔ peeling tumi ase.

III. Nkɛntɛnso a Rapid Cooling Nya wɔ PTFE High-temperature Tapes so

     Nkɛntɛnso a Ɛwɔ Adwennwen a Ɛwɔ Mu  So Onwini a ɛba ntɛmntɛm ne ade titiriw a ɛde adwennwen a ɛboro so ba. Direct quenching akyi sintering ma ɔhyew nsonsonoe kɛse ba PTFE matrix ne glass fiber framework ntam, ma ntɛm ara shrinkage nhyɛso na ɛnyɛ den sɛ ɛbɛyɛ mpaapaemu fɛfɛ.

Nneɛma a ɛwɔ soro no twetwe na ɛyɛ den ntɛmntɛm bere a emu fã no kɔ so trɛw, na ɛyɛ ɔhyew mu nhyɛso tebea a ɛyɛ akyi nhyɛso ne emu nhyɛso, a ɛma teyp mu paapae tẽẽ.

Nkɛntɛnso a ɛwɔ Dimensional Stability  So Onwini a ɛba ntɛmntɛm no dan crystallization peak no kɔ ɔhyew a ɛba fam so na ɛtew crystallinity so a crystal nhyehyɛe a enni mũ. Teyp no tra tebea a ɛyɛ nwini a ɛnkari pɛ mu bere a adum akyi. Crystallization a ɛto so abien ne post-shrinkage betumi asi wɔ ɔhyew nsakrae a edi hɔ ase, na ɛde nkakrankakra dimensional deviation aba.

Nkɛntɛnso a ɛwɔ Adhesive Adwumayɛ so  Onwini a ɛba ntɛmntɛm no siw adhesive layers no cross-linking koraa ano. Wɔde ade a wɔde nkata so no yɛ nwini ansa na ayɛ cross-linked network a edi mũ, na ɛma ahoɔden a ɛka bom ne ɔhyew a ɛko tia no so tew.

Wɔ awɔw ne ɔhyew kyinhyia a wɔtaa yɛ ase no, nsonsonoe a ɛda ɔhyew ntrɛwmu ntam wɔ PTFE substrate ne adhesive layer ntam no ma interfacial nhyɛso ba, ɛma adhesive onyin ne debonding yɛ ntɛmntɛm, na ɛma viscosity durability yɛ mmerɛw kɛse.

IV. Akwan Ahorow a Wɔfa so Yɛ Onwini a Wɔde Toto Ho

 

Mpɛn pii no, onwini a ɛyɛ brɛoo na ɛyɛ pɛ ne nnyinasosɛm titiriw a wɔde sa PTFE teyp a ɛyɛ hyew kɛse wɔ aduruyɛ akyi. Wɔhyɛ nyansa sɛ fa abɔdeɛ mu onwini a ɛwɔ fononoo mu no tom wɔ sintering akyi, na yi teyp a wɔde yɛ mframa onwini no kɔ dan mu hyew mu bere a ɔhyew no akɔ fam sen 150–200°C akyi. Onwini a ɛnsɛ bere a wɔreyɛ no bɛma ayɛ mmerɛw na awiei koraa no asɛe nneɛma no su.

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