Designing Adhesive Layer Structure ma Wide-Ɔhyew-Range PTFE Ɔhyew a ɛkorɔn Tapes

Ɔhyew a ɛtrɛw Ɛsɛ sɛ PTFE teyp no bond ahotoso wɔ -70°C (anaasɛ nea ɛba fam) na ɛtra ase bere a ɛkɔ so de di dwuma wɔ 200-260°C – span a ɛboro 300°C. Eyi hwehwɛ sɛ wɔyɛ nhyehyɛe a wɔde nkata so a ɛkɔ so yɛ nea ɛyɛ mmerɛw a enni huammɔdi a ɛka bom anaasɛ nkitahodi a ɛwɔ ntam no mu wɔ baabiara a ɛtra so.

Ntama a wɔde nkata so no taa yɛ silicone nhyɛso-te nka nkataso titiriw (PSA) a wɔde akata PTFE sini a wɔayɛ mu nsakrae wɔ soro anaasɛ fiberglass ntama a wɔde PTFE ahyɛ mu so. Ade titiriw a ɛbɛma adwumayɛ agyina pintinn wɔ ɔhyew mfɛnsere a ɛtrɛw saa mu no gyina sɛnea wɔbɛyɛ ntama a ɛsakra – nhyehyɛe a ɛkari pɛ wɔ ɔhyew a ɛba fam mu nsu, ɔhyew a ɛkɔ soro a ɛtwetwe a ɛko tia, ne ɔhyew a ɛma wotumi gyina ano.

Aokai PTFE ayɛ PTFE teapɔn a ɛyɛ hyew a ɛtrɛw denam nnyinasosɛm ahorow a wɔaka ho asɛm wɔ ase ha no so. Saa asɛm yi kyerɛkyerɛ nneɛma atitiriw anan a wɔde yɛ nhyehyɛe mu: nsakrae a ɛwɔ nsu mu no nhyehyɛe, po-supɔw so biphasic microstructure, gradient crosslinking, ne ɔhyew a ɛma ɛyɛ den a wɔde hyɛ mu ma.

Nsakrae Layer Nhyehyɛe Ntam Substrate ne Adhesive Layer

1. Asɛnnennen titiriw – PTFE soro ahoɔden

PTFE kyerɛ ahoɔden a ɛba fam koraa wɔ soro (18-20 dynes/cm). Direct coating of adhesive taa peel off bere a thermal cycling esiane mismatched ɔhyew ntrɛwmu coefficients – PTFE trɛw 30-40x sen fiberglass.

2. Surface activation ne primer anchoring

Sɛnea ɛbɛyɛ na wɔadi eyi ho dwuma no, PTFE no ani nnuru a wɔde kyerɛw wɔde sodium-naphthalene complexes anaasɛ plasma ayaresa fa de C=C nkitahodi abien ne polar akuw a oxygen wom ba. Ɛno akyi no, wɔde silicone primer a wɔahyira so a ɛyɛ teateaa yiye (sɛ nhwɛso no, silane coupling agent a vinyl wom) di dwuma de yɛ 'molecular bridge' wɔ ntam denam nnuru a wɔde boa so.

3. Adwennwen-buffering interlayer

Wɔ nnuru bi mu no, wɔde ntamgyinafo a ɛyɛ mmerɛw a ɛba fam, a ɛyɛ den kɛse (silicone a ɛte sɛ gel a ɛwɔ afã horow a ɛyɛ mmerɛw) hyɛ ade a wɔayɛ no adwuma ne ade titiriw a wɔde nkata so no ntam. Eyi twetwe nhyɛso a ɛwɔ ntam a ɔhyew a ɛsakrasakra denneennen de ba no na esiw ade a wɔde nkata so no ano a wɔma so no ano.

Po-Nsupɔw Biphasic Microstructure Mmara

Adhesive matrix titiriw no yɛ classic PSA nhyehyɛe a ɛyɛ MQ silicone resin (dispersed island phase) ne high-molecular-weight polysiloxane (continuous po phase).

1. MQ silicone resin – supɔw a ɛyɛ den no fã

Ɛma biakoyɛ, tumi a ɛkura mu, ne ɔhyew a ɛkorɔn a ɛko tia creep. Ne M/Q molar ratio (mpɛn pii no 0.6-0.9) ne particle size dispersion a wɔhwɛ so pɛpɛɛpɛ no hwɛ hu sɛ wɔde hyɛ mu pɛpɛɛpɛ wɔ phase a ɛkɔ so no mu ma ɛyɛ honam fam crosslinking mmeae.

2. Polysiloxane a ɛkɔ so fa – ɛpo a ɛyɛ mmerɛw fã

Ɛma tack ntɛmntɛm, ɔhyew a ɛba fam wettability, ne flexibility. Wɔtaa paw methyl vinyl silicone rɔba a emu duru yɛ kɛse anaa methyl phenyl vinyl silicone rɔba.

3. Titiriw optimization ma ɔhyew a ɛtrɛw

kakraa bi ka ho. siloxane afã horow a phenyl pii wom Wɔde Phenyl akuw siw polydimethylsiloxane a ɛyɛ hyew a ɛba fam no ano, na ɛma adhesive no brittleness hyew no so tew ba fam sen -100°C. Saa bere yi nyinaa, phenyl akuw ma ɔhyew-oxidative degradation resistance yɛ kɛse wɔ ɔhyew a ɛkɔ soro mu, na ɛma po mu fã a ɛkɔ so no tumi kura elasticity a ɛkorɔn mu wɔ ɔhyew mfɛnsere a ɛtrɛw so.

Multi-Layer anaa Gradient Crosslinking Design ma Ɔhyew Shock Resistance

Wɔfa ɔkwan a wɔfa so kata ade so abien na ama wɔatumi akari pɛ wɔ ɔhyew a ɛkɔ soro a ɛko tia creep ne ɔhyew a ɛba fam tackiness mu:

1. Mfinimfini fã (substrate fã) .

Relatively high crosslink density , de ahoɔden a ɛkorɔn a ɛkura mu a ɛyɛ den ne ahoɔden a ɛka bom sɛ shear-resistant framework ma.

2. Abɔnten so ade (bonding surface) .

Ultra-low crosslink density a ɛwɔ molecule nkɔnsɔnkɔnsɔn a ɛkɔ baabiara kɛse, a ɛhwɛ hu sɛ ɛyɛ nsu ntɛmntɛm wɔ adherends so wɔ ɔhyew a ɛba fam ne mfitiase tack a ɛdɔɔso.

Sɛnea ɛbɛyɛ foforo no, wɔhyehyɛ crosslink density a ɛkɔ so fi mu kɔ akyi fã wɔ ɔfa biako mu denam akwan a wɔfa so sa yare so, na ɛka dwumadi mmeae a ɛyɛ den na ɛyɛ mmerɛw bom a ɛnyɛ den.

Aokai PTFE de gradient crosslinking mfiridwuma di dwuma de hwɛ hu sɛ teapɔn no kɔ so yɛ mmerɛw wɔ -70°C (ɛma mfitiase tack ne conformability tumi) bere a ɛkura ahoɔden a ɛka bom wɔ 260°C (ɛsiw creep ne adhesive transfer ano).

Ɔhyew-Stabilized Composite Fillers a wɔde ahyɛ mu ma

Wɔde nano-scale fumed silica apete fɛfɛɛfɛ wɔ adhesive matrix no mu de ahyɛ mu den, na wɔde nneɛma a wɔde hyɛ mu a ɛyɛ adwuma akuw abien aka ho:

1. Nneɛma a wɔde ka ho a ɛko tia ɔhyew

Cerium oxide, iron oxide, ne radical scavengers afoforo siw oxidative hardening a siloxane afã nkɔnsɔnkɔnsɔn ne akyi nnompe sɛe wɔ ɔhyew kɛse ase. Saa nnuru a ekum ɔyare mmoawa yi trɛw nkwa nna mu wɔ 260°C.

2. Nneɛma a wɔde hyɛ mu ma a ɛma ɔhyew kɔ

a ne kɛse te sɛ micron , alumina Aluminium nitride , ne nea ɛkeka ho no sɛe ɔhyew ntɛmntɛm ma ɛtew ɔhyew a ɛboaboa ano wɔ mu no so na ɛma onyin brɛ ase. Eyi ho hia titiriw ma dwumadie a wɔde teyp no di dwuma sɛ ɔhyew ntam nkitahodi anaa baabi a ɔhyew a ɛba fi substrate no mu no betumi ama ade a wɔde nkata so no asɛe ntɛmntɛm.

Fillers nyinaa hia surface passivation anaa silane treatment na wɔakwati modulus a ɛkɔ soro dodo ne adhesive hardening wɔ ɔhyew a ɛba fam mu.

Nsɛm a Wɔaboaboa Ano – Adaptive Network ma Tebea a Ɛyɛ Den

Adhesive layer a ɛtrɛw-ɔhyew-range PTFE tapes yɛ titiriw platinum-catalyzed addition crosslinking microphase-tetew ntam network embedded ne MQ resin nnuru anchoring mmeae ne hybrid phenyl tenten-nkɔnsɔnkɔnsɔn siloxanes. Ɛnam gradient crosslinking ne co-crosslinking mfiridwuma so no, ɛka bom pɛpɛɛpɛ:

• Nsu a ɛba ntɛmntɛm ne sɛnea ɛyɛ mmerɛw kɛse wɔ ɔhyew a ɛba fam mu

• Nkitahodi a emu yɛ den ne anti-oxidation adwumayɛ wɔ ɔhyew a ɛkorɔn mu

...wɔ elastic adhesive layer biako mu, a edi katee trɛw-ɔhyew-range application ahwehwɛde ahorow ho dwuma.

Aokai PTFE yɛ PTFE teyp a ɛyɛ hyew a ɛtrɛw denam saa adhesive nhyehyɛe nhyehyɛe yi so. Amanneɛbɔ nkyerɛkyerɛmu – a nea ɛka ho ne thickness, crosslink gradient, ne filler loading – wɔ hɔ ma application ahiadeɛ pɔtee.

Saa mfiridwuma ho asɛm yi yɛ nea wɔde ama Jiangsu Aokai Nneɛma Foforo Mfiridwuma Co., Ltd.

Sɛ wopɛ sɛ wusua nsɛm a ɛkɔ akyiri, dwumadie tebea ne ano aduru a wɔayɛ ama yɛn nneɛma nyinaa, a PTFE ntama a ɛyɛ hyew a ɛkorɔn, PTFE adhesive tapes, PTFE mesh conveyor belts, seamless fusing machine belts, single-sided PTFE coated ntama, high-temperature resistant conveyor belts ne high-temperature fiberglass ntama, ka ho a. yɛsrɛ sɛ fa akwan a ɛwɔ aseɛ ha yi so ne yɛn nni nkitaho:

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