Nsonsonoe a ɛwɔ PTFE High-Temperature Tape no Adwumayɛ mu Gyinabea a ɛnam Akwan Abien a Silicone Pressure-Sensitive Adhesive a ɛma ɛyɛ kɛse so de ba: Room-Temperature Maturation vs High-Temperature Maturation

Jiangsu Aokai New Materials, a ɛyɛ adwumayɛfo a wɔyɛ PTFE teyp a ɛyɛ hyew kɛse, kyerɛkyerɛ nsonsonoe a ɛwɔ nneɛma a ɛyɛ den a silicone pressure-sensitive adhesive (PSA) a ɛyɛ dan mu hyew ne ɔhyew a ɛkɔ soro nyin de ba no mu kɔ akyiri.

I. Nsonsonoe a ɛwɔ Crosslinking Network ne Cohesive Strength mu

1. Ɔhyew a ɛkorɔn nyin: Dense crosslinking network formation

Wɔ adeyɛ ɔhyew a ɛyɛ 120 ° C ~ 180 ° C ase no, molecule nkɔnsɔnkɔnsɔn a ɛwɔ adhesive layer no mu nya mobility a ɛdɔɔso, na ɛma collision frequency a reactive functional groups kɔ soro. Wɔyɛ ntama a ɛwɔ afã abiɛsa a ɛyɛ crosslinked kɛse, a wɔakyekyɛ no pɛpɛɛpɛ, na ɛma ade a wɔde nkata so no nya ahoɔden a ɛyɛ den a ɛka bom ma ɛko tia nsu a ɛsen ne nea ɛsakra wɔ ɔhyew a ɛkɔ soro mu.

2. Pia mu hyew a ɛkɔ soro: Loose crosslinked structure

Nneyɛe kɔ so nkakrankakra na enni mũ wɔ ɔhyew a atwa yɛn ho ahyia (~25°C) mu, na ɛde mmeae a ɛtrɛw, ɛnyɛ pɛpɛɛpɛ ne nkɔnsɔnkɔnsɔn afã horow a ɛnyɛ adwuma pii a enni ade a wɔakyere wɔ ade a wɔde nkata so no mu ba. Nneɛma a ɛte saa a ɛyɛ mmerɛw no hu amane kɛse wɔ biakoyɛ a ɛnnɔɔso mu, na ɛyɛ mmerɛw anaasɛ ɛwea ntɛm ara wɔ ɔhyew ase.

3. Nkɛntɛnso a ɛyɛ gyinaesi wɔ adhesive nkae so wɔ peeling akyi

Teyp a ɛho akokwaw a ɛyɛ hyew kɛse de tumi a ɛka bom a emu yɛ den koraa hoahoa ne ho sen tumi a ɛbata nneɛma a ɛwɔ ntam no ho; adhesive layer no nyinaa peels off integrally a nkae biara nni mu. Nea ɛne eyi bɔ abira no, dan mu hyew teapɔn a ɛho akokwaw no yɛ mmerɛw sɛ ɛbɛfa nkogudi a ɛka bom mu, a adhesive a atetew a wogyaw wɔ bonded substrates so na ɛyɛ efĩ a ɛyɛ den — eyi ne adwumayɛ mu nsonsonoe a ɛyɛ mmerɛw sen biara wɔ akwan abien no ntam.

II. Nkitahodi Ahoɔden a ɛwɔ PTFE Substrate

1. Ɔhyew a ɛkorɔn nyin: Nnuru a wɔde hyɛ ankora mu

PTFE kyerɛ ultra-low soro ahoɔden na ɛhwehwɛ soronko soronko wɔ soro ayaresa anaasɛ primer coating. Ɔhyew a ɛkorɔn maturation ma co-curing primer ne silicone adhesive bere koro mu, ma interpenetrating nnuru bonding networks wɔ interface. Ultra-high bonding ahoɔden no siw adhesive delamination a edi mũ fi substrate bere a mpɛn pii wɔ ɔhyew a ɛkorɔn adwumayɛ.

2. Room-temperature maturation: Ɛde ne ho to honam fam adsorption so

Ambient temperature ntumi mma primer no tumi a ɛyɛ adwuma nyinaa nyɛ adwuma. Nkitahodi a ɛda adhesive ne substrate ntam no gyina intermolecular physical adsorption a ɛyɛ mmerɛw so titiriw, a bonding ahoɔden sua koraa sen nnuru crosslinking.

3. Asiane ahorow a ɛsono nea ɛwɔ ɔhyew a ɛkɔ soro delamination mu

Ɛnyɛ den sɛ nkitahodi ahorow a honam fam adsorption kura mu no di nkogu wɔ bere tenten a wɔde hyɛ ɔhyew a ɛkorɔn mu, na ɛde ntama a edi mũ kɔ adwumayɛbea ne PTFE ntama a ɛda hɔ kwa no so. Nea ɛne eyi bɔ abira no, nnuru a wɔde hyɛ ntini mu a ɛnam ɔhyew a ɛkɔ soro a ɛma ɛyɛ kɛse so hyehyɛ no yi asiane ahorow a ɛte saa a ɛwɔ delamination mu no fi hɔ ma wotumi de ho to so.

III. Low-Molecular Residues & Ɔhyew a ɛkorɔn a ɛyɛ hyew

1. Ɔhyew a ɛkorɔn nyin: Efĩ a ɛdɔɔso a woyi fi hɔ ansa na wɔde ama

Ɔhyew a ɛkorɔn mu maturation nhyehyɛe no yɛ adwuma sɛ pre-purging stage a edi mũ, ɛkame ayɛ sɛ eyi nneɛma a ɛyɛ hyew a nea ɛka ho ne catalysts, low-molecular silicone oils ne reaction byproducts. Ntama a wɔde nkata so a wɔawie no kɔ so ho tew a mframa a ɛyɛ hyew a ɛnyɛ hwee na ɛba bere a wɔde di dwuma awiei no.

2. Pia mu hyew a ɛkɔ soro: Nneɛma akɛse a molecule kakraa bi na ɛwɔ mu a wɔakyere wɔ mu

Nneɛma nketenkete a molecule kakraa bi na ɛwɔ mu no da so ara yɛ nea wɔatoto mu wɔ adhesive matrix no mu wɔ dan mu hyew mu. Sɛ wodi kan de teyp no to ɔhyew a ɛboro 200°C mu a, saa nneɛma yi yɛ hyew ntɛmntɛm na ɛtrɛw denneennen.

3. Nkɛntɛnso a ɛsɛe ade a ɛba wɔ ahoɔden a wɔde gyina pintinn so

Concentrated volatilization a low-molecular compounds kanyan bubbling, blistering ne nnam tack hwere wɔ tape so. Ebetumi nso agyaw silicone ngo nkekae wɔ nneɛma a wɔde ɔhyew akata so bere a osu atɔ ɔhyew kɛse akyi. Enti, dan mu hyew a ɛho akokwaw teyp da adwumayɛ a entumi nnyina koraa adi bere a edi kan a ɛyɛ hyew no, na entumi nyɛ ahotew gyinapɛn a emu yɛ den ma ɛlɛtrɔnik mfiri, nnuan a wɔde kyekyere nneɛma ne nnwuma afoforo a wɔyɛ no pɛpɛɛpɛ.

IV. Bere Tenten Ɔhyew Onyin & Adwumayɛ Drift

1. Ɔhyew a ɛkorɔn nyin: Thermodynamically stable tebea bere a wɔde ama

Ɔhyew a ɛkɔ soro nyin ma ɛkame ayɛ sɛ crosslinking reactions no wie, enti tape ahorow fi adwumayɛbea hɔ a ɛwɔ adwumayɛ ho nkyerɛkyerɛmu a ɛyɛ den. Nsɛnkyerɛnneɛ a ɛho hia te sɛ peel ahoɔden ne tumi a ɛkura mu kɔ so yɛ pɛpɛɛpɛ wɔ ɔsom kyinhyia no nyinaa mu, a ɛda adi pefee sɛ post-curing shrinkage, hardening anaa dimensional fluctuation, de adwumayɛ a wɔtumi hyɛ ho nkɔm kɛseɛ ma.

2. Room-temperature maturation: Nkɔso a ɛto so abien maturation bere a ɔsom

Teyp a wɔayɛ no yiye wɔ dan mu hyew mu no fa crosslinking reactions a enni mũ mu bere a wɔde to ɔhyew a ɛkɔ soro mu wɔ adetɔfo no beae no. Bere kɔ so no, ɛyɛ den nkakrankakra na ɛyɛ mmerɛw; peel ahoɔden kɔ soro kan afei ɛso tew kɛse, na tack betumi ayera koraa wɔ tebea horow a emu yɛ den mu.

3. Ɔsom mu ahotoso a wɔde toto ho a ɛkɔ akyiri

Esiane sɛ wonya mfaso fi nnuru nhyehyɛe a ɛyɛ den mu nti, teapɔn a ɛho akokwaw a ɛyɛ hyew kɛse no kura tumi a ɛda nsow a ɛkura mu wɔ 260°C adwumayɛ tebea horow a ɛkɔ so mu, na ɛko tia sliding ne edge curling. Teyp a ɛho akokwaw wɔ dan mu hyew mu no adwumayɛ kɔ so kɔ baabiara, na ɛma nneɛma a wɔyɛ no daa no ntumi nyɛ yiye. Nsonsonoe titiriw no gyina sɛ ɔhyew a ɛkɔ soro mu nyin wie nnuru mu nsakrae a entumi nnyina nyinaa ansa na wɔde ama, na ɛma wɔn a wɔde di dwuma awiei no nya ahotoso kɛse wɔ adwumayɛ mu.

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