PTFE Tape Adhesion vs Temperature: Sɛnea Wobɛma Atu mpɔn

Jiangsu Aokai New Materials, adwumayɛfo fibea a wɔyɛ PTFE teapɔn a ɛyɛ hyew kɛse, kyɛ adwumayɛfo nhumu ma wo.

Mpɛn pii no wobetumi de PTFE (Teflon) teyp a ɛyɛ hyew kɛse adi dwuma bere nyinaa wɔ ɔhyew a efi -196°C kosi 260°C mu . Wɔ dwumadie dodoɔ no ara mu no, ɔhyew a ɛko tia anohyetoɔ a ɛwɔ teyp no mu no, adhesive layer no na ɛto ano hyeɛ  mmom sen PTFE substrate no. Sɛnea ɛyɛ adwuma no di mmara a emu da hɔ a ɛfa ɔhyew ho akyi:

Adhesive adwumayɛ so tew bere a ɔhyew kɔ soro  Bere a ɔhyew kɔ soro no, ade a wɔde nkata so no yɛ mmerɛw nkakrankakra, ɛwea na mpo sɛe, na ɛma ahoɔden a ɛka bom no so tew. Wɔ macroscopically, eyi da adi sɛ holding adhesion a ɛso tew.

Adwumayɛ ho ahwehwɛde a wɔde adhesive type kyerɛ  Ntama ahorow wɔ huammɔdi hyew a ɛsono kɛse:

 

To improve the high-temperature holding time , optimization yɛ titiriw fi afã abiɛsa: adhesive formulation, substrate adwumayɛ, ne interfacial bonding nhyehyɛe.

1. Adhesive Layer: Yɛ Weak Link no foforo

·  Paw ɔhyew a ɛkorɔn a ɛko tia adhesive nhyehyɛe : Di kan silicone nhyɛso te nka adhesive ma bere tenten ɔhyew a ɛkorɔn adwumayɛ tebea horow.

·  Fluorocarbon nsakrae : Sesa silicone adhesive ne fluorocarbon nnuru ma ahwehwɛ nsakrae hyew (Tg) kɔ soro kodu 230°C. Bere a wɔde nnɔnhwerew 48 akɔ so de adi dwuma wɔ 260°C akyi no, adhesion retention rate no da so ara boro 85%.

·  Fa crosslinking network ba : Yɛ nano-scale crosslinking networks na ama ahoɔden a ɛka bom ne shear resistance a ɛwɔ adhesive layer no mu no ayɛ kɛse wɔ ɔhyew a ɛkorɔn mu.

·  Fa thermal stabilizers ka ho : Fa hindered phenol ne thermal stabilizers afoforo ka formula no ho na ama oxidative degradation asiw yiye wɔ ɔhyew a ano yɛ den ase.

2. Substrate Layer: Ma ɔhyew a ɛko tia anohyeto no nyinaa so

·  Nano-filler nsakrae : Fa nano silica, boron nitride nanotubes ne nanoparticles afoforo gu PTFE substrate mu ma ɛyɛ honam fam crosslinking nsɛntitiriw. Wobetumi ama ɔhyew a wɔkyinkyim no hyew akɔ soro 20–30°C, bere a wɔkura bɛboro 90% wɔ mfiase a ɛbata ho no mu wɔ 260°C.

·  Molecular crosslinking ayaresa : Crosslink PTFE molecular nkɔnsɔnkɔnsɔn ma kɔ so som ɔhyew kɔ 300°C.

·  Fiber reinforcement : Fa 25% glass fiber anaa carbon fiber ka ho na ama creep resistance akɔ soro 300%, na ama wɔatumi de adi dwuma daa akodu 280°C.

3. Interface & Structural Design: Ma bonding a ɛyɛ den no nkɔ anim

·  Substrate surface treatment : Fa plasma ayaresa anaa nnuru etching gu PTFE soro na ama roughness ne surface dwumadi akɔ soro, ahyɛ interfacial adhesion den na kwati delamination wɔ ɔhyew a ɛkorɔn mu.

·  Fa mfinimfini akwanside layer ka ho : Fa polyimide (PI) isolation layer hyɛ PTFE substrate ne adhesive ntam na asiw adhesive penetration ne migration wɔ ɔhyew a ɛkorɔn ase, ma structure nyinaa gyinabea tu mpɔn.

·  Optimize composite nhyehyɛe : Adopt multi-layer composite nhyehyɛe: PTFE coating + reinforcing substrate + high-temperature stable layer , sɛnea ɛbɛyɛ a ɛkari pɛ ɔhyew a ɛko tia ne adhesive adwumayɛ koraa.

·  Reserve thermal expansion clearance : Linear ntrɛwmu coefficient a PTFE yɛ bɛyɛ mmɔho 10 sɛ dade.

Fa kwan a ɛyɛ 0.15–0.3 mm sie  wɔ adansi nhyehyɛe mu na ama ɔhyew nhyɛso afi hɔ yiye.

Mfiridwuma ho nsɛm a ɛwɔ atifi hɔ no, wɔde ma Jiangsu Aokai Nneɛma Foforo Mfiridwuma Co., Ltd.

Sɛ wuhia nsɛm foforo wɔ mfiridwuma parameters, application scenarios ne customized ano aduru ma yɛn full product line — a PTFE high-temperature ntama, PTFE high-temperature tape, PTFE high-temperature mesh belt, seamless fusing machine belt, single-sided PTFE ntama, high-temperature resistant conveyor belt ne high-temperature resistant fiberglass ntama ka ho — yɛsrɛ sɛ ntwentwɛn wo nan ase sɛ wobɛka yɛn ho asɛm:

·  Ntrɛwmu a wɔde frɛ nkurɔfo: Owura Guo +86 18944819998

·  Ntrɛwmu a wɔde frɛ nkurɔfo: Owura Liu +86 13705266308

Yɛdi adwumayɛ ho nyansapɛ a ɛfa adwumayɛ ho nimdeɛ ne nokwaredi ho bere nyinaa, na yɛbɔ mmɔden sɛ yɛde mfiridwuma ano aduru a ɛwɔ baabi biako ne adetɔn akyi som a wosusuw ho bɛma wo.