Silicone PSA Afei Ɔhyew a Ɛkorɔn Onyin: Peel Ahoɔden ne Cohesion sɛnea Grade

Bere a a Wɔde PTFE adhesive tape a ɛyɛ hyew kɛse di dwuma wɔ baabi a ɛhɔ yɛ hyew – ka sɛ, 200°C adapɛn anaa asram pii – silicone pressure-sensitive adhesive (PSA) no betumi asesa. Ahoɔden a wɔde peel no betumi akɔ soro, ahwe ase, anaasɛ ɛde nkae no akɔ baabi foforo. Nkitahodi betumi akɔ soro (brittleness) anaasɛ ɛbɛtew (cohesive failure).

Ɛnyɛ silicone PSA ahorow nyinaa na ɛyɛ wɔn ade sɛnea ɛte. Nsonsonoe no ba fam wɔ polymer a wɔahyehyɛ (methyl vs. methylphenyl), crosslinking mechanism (peroxide vs. addition cure), ne MQ resin ne rɔba nsusuwii so.

Aokai PTFE de silicone PSA grades pii di dwuma wɔ yɛn tapes mu. Saa akwankyerɛ yi kyerɛkyerɛ nea ɛba wɔ peel ahoɔden ne biakoyɛ so wɔ ɔhyew a ɛkɔ soro onyin akyi ma grade biara, ne sɛnea wobɛpaw nea ɛfata ama wo application no.

Nea Ɛba Silicone PSA wɔ Ɔhyew Ase – Nkonimdi Akwan Abien

Sɛ silicone PSA ahorow no nyin wɔ ɔhyew a ɛkɔ soro (200-250°C) mu a, ebetumi ayɛ nsakrae abien a ɛne ne ho bɔ abira:

1. Post-crosslinking (ɛma ɛyɛ mmerɛw) .

Akuw a wɔyɛ adwuma a wɔnyɛ wɔn ade kɔ so yɛ wɔn ade, na ɛma crosslink density kɔ soro. Ebia ahoɔden a wɔde yiyi mfiase no bɛkɔ soro bere tiaa bi, afei ahwe ase denneennen bere a ade a wɔde nkata so no yɛ den dodo no. Ɛte sɛ nea ahoɔden a ɛwɔ static shear mu no kɔ soro, nanso tumi a wɔde kura mu ne sɛnea ɛko tia sɛnea ɛbɛbɔ no sɛe. Adhesive film no yɛ den na ɛpaapae.

2. Akyi dompe a ɛsɛe (ɛma peel no yera ne nea aka) .

Polydimethylsiloxane akyi dompe no yɛ cyclization ne nkɔnsɔnkɔnsɔn scission. Peel ahoɔden so tew bere nyinaa. Adhesive no betumi akɔ substrate (residue) no so anaasɛ adi nkogu wɔ biakoyɛ mu. Eyi abu so wɔ methyl silicone PSA ahorow a ɛba fam mu.

Nneɛma atitiriw a ɛma wotumi sesa nneɛma:

• Phenyl a ɛwɔ mu (ɛkɔ soro = ɔhyew a ɛko tia yiye) .

• Crosslink density ne ayaresa su (aduru a wɔde ka ho vs. peroxide ayaresa) .

• MQ resin ne silicone rɔba ntam nsonsonoe

Grade Classifications denam Nnuru a Wɔde Yɛ Adwuma so

1. Polydimethylsiloxane a wɔde di dwuma wɔ ɔkwan a ɛfata so (methyl-type silicone PSA) .

• Peel a wɔkora so bere a anyin akyi (200-250°C): Peel ahoɔden kɔ soro kakra mfiase no, afei ɛso tew. Nnafua 7 akyi wɔ 250°C mu no, peel retention yɛ 50-70% pɛ . Adwumayɛ so tew ntɛmntɛm wɔ ɔhyew a ɛkɔ soro mu. Ɔsɛe no fi dimethyl siloxane akyi dompe no cyclization mu.

• Cohesion stability: Peroxide-cured versions (sɛ nhwɛso no, KR-101) wɔ residual initiators a ɛde post-curing a wontumi nni so – adhesive hardens na embrittles. Mfiase no ahoɔden a wɔde twitwa no tu mpɔn, nanso tumi a wɔde kura mu no so tew, na cohesive huammɔdi ba wɔ ɔhyew ase. Nkyerɛase ahorow a wɔde ka ho no ye kakra nanso ɛda so ara yɛ nea anohyeto wom esiane ɔhyew a ɛwɔ hɔ a ɛnyɛ papa a ɛwɔ dimethyl akyi dompe no mu nti.

2. Methylphenyl polysiloxane (ɔhyew a ɛkɔ soro a ɛko tia grade) .

• Peel retention akyi onyin: Phenyl afã nkɔnsɔnkɔnsɔn sɛe daa packing dimethyl afã horow na siw cyclization degradation ano. Wɔ nnafua 7 akyi wɔ 250°C mu no, ahoɔden a ɛwɔ peel no mu no boro 85% . Nnuru a phenyl pii wom no kɔ so kura peel su a ɛyɛ den mu wɔ 260-288°C mpo mu.

• Nkabom a ɛyɛ den: Ɛyɛ papa yiye. Shear ahoɔden sesa kakraa bi; holding power retention boro 80%. Ntama a wɔde nkata so no kɔ so yɛ nea ɛyɛ mmerɛw bere tenten a ɛnsɛe anaasɛ ennya nkae. Addition-cured high-phenyl grades ne premium ɔhyew a ɛyɛ den silicone PSA.

3. Special high-peel ne low-peel amanne grades

• High-peel grades (sɛ nhwɛso no, Dow 7385, typical peel >10N/25mm): MQ resin loading a ɛkorɔn ma mfiase tack ne peel ahoɔden a eye kyɛn so, nanso ɛho ka yɛ ɔhyew a ɛko tia ne cohesion stability. Wɔda peel drop kɛse adi bere a wɔabɔ akwakoraa ne aberewa akyi na wɔtaa nya nkae esiane resin thermal decomposition nti. Fa di dwuma ma nneɛma a wɔde di dwuma wɔ ɔhyew a ɛba fam bere ne bere mu nkutoo.

• Low-peel, high-cohesion protective film grades: Crosslink density a ɛkorɔn ma peel adwumayɛ a ɛyɛ den ne onyin a ɛyɛ papa a ɛyɛ den, nanso mfiase tack a ɛba fam. Bere a wɔabɔ akwakoraa ne aberewa akyi no, wɔkɔ so yɛ biako nanso wɔyɛ den, na ɛtew sɛnea ɛne nneɛma a ɛso yɛ toro no hyia so.

Crosslinking Mechanism – Peroxide vs. Aduru a Wɔde Ka Ho (Methyl Base Korɔ no ara) .

Sɛ wɔde methyl polymer koro no ara di dwuma mpo a, ɔkwan a wɔfa so sa yare no sesa onyin suban kɛse.

1. Peroxide-cured (awo ntoatoaso a edi kan a wɔtaa yɛ) .

• Peroxide a aka no kanyan post-crosslinking a wontumi nni so bere a ɔhyew a ɛkɔ soro onyin no.

• Peel ahoɔden spikes mfiase no, afei ɛhwe ase denneennen.

• Nkabom kɔ soro bere tiaa bi, na ɛno akyi no, ɛyɛ mmerɛw na anyinam ahoɔden a wɔde kura mu no di huammɔ.

• Batch-to-batch onyin a ɛkɔ so daa no nyɛ papa.

2. Wɔde aduru a wɔde ka ho a wɔde sa yare (hydrosilylation a wɔde sa yare) .

• Cure mma nneɛma biara a efi mu ba; crosslink network no yɛ nea wotumi di so pɛpɛɛpɛ.

• Nsakrae a ɛba agyapade mu wɔ onyin akyi no di linear trend a wotumi hyɛ ho nkɔm akyi.

• Peel retention ne cohesion stability a ɛkorɔn koraa sɛ wɔde toto peroxide formulations ho a.

Akwankyerɛ a Wɔde Paw Abasobɔde

Aokai PTFE nyansahyɛ : Sɛ wopɛ PTFE teyp biara a ɛbɛhu ɔhyew a ɛkɔ so boro 200°C a, kyerɛ methylphenyl silicone PSA a wɔde aka ho. Ɛka a wɔbɔ ansa na wɔadi kan no dɔɔso, nanso esiw afuw mu huammɔdi a ɛnam adhesive nkae anaa bond a ɛyera so ba no ano.

Nsɛm a wɔaboaboa ano – Silicone PSA Grade a ɛne Ɔhyew a Wɔhwehwɛ no hyia

• Methyl-type silicone PSA (titiriw a wɔde peroxide ayɛ) fata ma bere ne bere mu anaasɛ ɔhyew a ɛba fam nkutoo. Nnafua 7 akyi wɔ 250°C, hwɛ kwan sɛ 30-50% peel loss ne embrittlement a ebetumi aba.

• Methylphenyl (high-phenyl) silicone PSA kura >85% peel ahoɔden ne flexible cohesion wɔ onyin koro no ara akyi. Ɛyɛ nea wɔpaw ma 200-250°C som a ɛkɔ so.

• Crosslinking mechanism ho hia kɛse: addition cure (hydrosilylation) yɛ nea egyina pintinn koraa sen peroxide ayaresa.

• High-peel grades sesa onyin stability ma mfitiase tack – kwati wɔn wɔ ɔhyew applications.

Sɛnea ɛbɛyɛ a ɛhwehwɛ ɔhyew a ɛkorɔn bonding, Aokai PTFE de add-cured methylphenyl silicone PSAs di dwuma. Yebetumi de peel retention data ama wɔ 1000h akyi wɔ 250°C bere a wɔabisa no.

Mfiridwuma mu nsɛm a wɔde mae denam Jiangsu Aokai Nneɛma Foforo Mfiridwuma Co., Ltd.

Sɛ wopɛ mfiridwuma ho nsɛm a ɛkɔ akyiri ne ano aduru a wɔahyɛ da ayɛ ama PTFE ntama a ɛyɛ hyew kɛse, teyp, mesh abɔso, ne nea ɛkeka ho a:

• Owura Guo: +86 18944819998

• Owura Liu: +86 13705266308 akyerɛw

Bere a yɛbata adwumayɛ ne nokwaredi ho no, yɛde ano aduru a wɔayɛ no sɛnea wɔpɛ ne nnwuma a wosusuw ho yiye wɔ adetɔn akyi ma.