Sɛnea Solvent Volatilization Rate Ka PTFE Tape Coating Su

Wɔ nneɛma a wɔyɛ mu PTFE high-temperature tape , wɔde silicone nhyɛso-te nka adhesive no di dwuma sɛ solvent-gyina ano aduru. Bere a teyp a wɔde akata so no fa fononoo a wɔde dry no mu no, solvent no yɛ nwini, na ɛma ade a ɛyɛ den a wɔde nkata so. Ahoɔden a eyi ba – solvent volatilization rate – yɛ core process parameter a ɛkyerɛ sɛ ebia adhesive a etwa to no ani yɛ torotoro, sintɔ biara nni mu, na ɛyɛ den bere nyinaa, anaasɛ pinholes, craters, ne streaks akata so.

Aokai PTFE ayɛ optimized coating akwan wɔ mpempem pii production runs. Saa akwankyerɛ yi kyerɛkyerɛ sɛdeɛ volatilization rate ka leveling, pinhole formation, ne crater defects – ne sɛdeɛ wɔdi so ma PTFE tape a ɛyɛ papa.

Sɛnea Volatilization Rate Ka Leveling – Viscosity Aguadi-Off no

Leveling yɛ tumi a ade a wɔde nkata so a ɛyɛ nsu tumi yi nsensanee a wɔde kata so, nsensanee a ɛtrɛw, ne akutu a wɔde ayɛ no fi hɔ, na ɛma ɛyɛ nea ɛyɛ torotoro. Tumi a ɛkanyan no ne nhyɛso a ɛwɔ soro; nea ɛko tia no ne viscosity.

1. Ntɛmntɛm dodo – surface skinning gyae levelling

Sɛ aduru a wɔde yɛ aduru no yɛ hyew ntɛmntɛm dodo a, aduru a wɔde yɛ aduru a ɛwɔ soro no so tew ntɛmntɛm. Silicone PSA (polysiloxane aduru a emu duru yɛ kɛse) yɛ nea ɛyɛ mmerɛw kɛse wɔ sɛnea ɛdɔɔso ho. Surface layer viscosity kɔ soro exponentially – mpo ɛyɛ kɛse-viscosity 'skin' ɛkame ayɛ sɛ amonom hɔ ara.

Saa honam ani hwɛbea yi to ade a wɔde nkata so a ennyaa aduru a ɛwɔ ase no mu. Ntama a wɔde nkata so no ntumi nsen bio mma nsensanee anaa agyiraehyɛde ahorow a ɛwɔ agyan no so no nyɛ pɛ. Wɔde nkyerɛwee a ɛnkɔ so daa a ɛba bere a wɔde kata so no si hɔ daa.

2. Ɛyɛ brɛoo dodo – sagging ne dewetting

Sɛ aduru a wɔde yɛ aduru no yɛ hyew brɛoo dodo a, ade a wɔde nkata so no kɔ so yɛ nsu a ɛnyɛ den pii bere tenten dodo. Bere a eyi ma bere ma wɔde yɛ pɛpɛɛpɛ no, tumi a ɛtwe ade ba fam no ma:

• Sagging (adhesive tu mmirika kɔ fam wɔ nneɛma a ɛda hɔ gyina hɔ so) .

• N’ano a ɛyɛ den (atare a wɔde ntama ayɛ wɔ baabi a wɔakata so no anoano) .

• Dewetting – wɔ low-surface-energy PTFE substrates (critical surface tension only 18-20 mN/m), wetting a ɛkyɛ no betumi ama adhesive no atew ankasa na atwe afi substrate no ho, asɛe surface smoothness.

Sɛnea Volatilization Rate De Pinholes Ba

Pinholes yɛ ntokuru nketenkete a ɛfa ade a wɔde nkata so no mu. Wɔba bere a aduru a wɔde hyɛ mu anaa mframa mu ahurututu no kyekyere na ɛpae fa baabi a ɛyɛ den ansa na ade a wɔde nkata so no atumi asan akɔ no.

1. Adwinnade 1 – boling solvent a wɔakyere wɔ honam ani

Sɛ teyp a wɔde akata so no hyɛn fononoo a wɔde dry no mu a, ɔhyew a ɛkɔ soro denneennen a wɔde ka ho ne solvent volatilization a ɛyɛ ntɛmntɛm yiye no di kan sa sini no ani. Nnuru a wɔde siw ano a wɔakyere wɔ ɔfa no mu no yɛ nwini denneennen, na ɛyɛ ahurututu. Sɛ emu ahurututu nhyɛso bubu honam ani honam ani a ɛyɛ den no pɛ a, nsu film a apaapae no ntumi nsan nkɔ na ɛsa – na ɛma pinholes a ɛtra hɔ daa anaasɛ amena a ɛte sɛ ogya bepɔw.

2. Afiri 2 – ahurututu ntumi nguan

Mframa nketenkete a ɛwɔ mu no kɔ mu bere nyinaa bere a wɔde kata so na wɔde ntama rema no. Wogye bere a ɛdɔɔso na ama wɔatumi asensɛn soro, apaapae, na wɔasa bere a ɛnyɛ den pii no. Sɛ nea ɛwɔ soro no ho yɛ hare ntɛmntɛm esiane sɛ ɛyow ntɛmntɛm nti a, ahurututu ntumi mfi mu na wɔde si hɔ sɛ pinholes.

3. Adwinnade 3 – micro-pits a ɛnyɛ papa

Nsu a ɛyɛ hyew ntɛmntɛm no ma adhesive viscosity no yɛ kɛse kɛse, na ɛma ano aduru no ntumi mfa nkakrankakra hyɛ micro-pits ma na ɛpam mframa a ɛwɔ ntam no. Eyi ma nsu mu sintɔ ahorow a ɛte sɛ pinhole a ɛyɛ den ba bere a wɔayow awie no.

Sɛnea Volatilization Rate De Craters (Dimples) Ba .

Abotan yɛ mmeae nketenkete a ɛyɛ kurukuruwa a ɛwɔ ade a wɔde nkata so no ani, na ɛda nsow wɔ pinholes ho. Wɔde mpɔtam hɔ nhyɛso a ɛnkari pɛ na ɛde ba.

1. Adwinnade 1 – nsuo a ɛyɛ nwini

Ntɛmntɛm solvent volatilization twetwe vaporization ɔhyew kɛse, na ɛyɛ nwini denneennen film a ɛyɛ nsu ne substrate no ani. Sɛ ɔhyew no kɔ fam sen bosu a atwa ho ahyia no a, nsu a ɛyɛ hyew a ɛwɔ mframa no mu no yɛ nsu nketenkete a ɛwɔ sini a ɛyɛ nsu no so.

• Nsuo a ɛwɔ soro no mu nhyɛsoɔ: ~72 mN/m

• Silicone adhesive no ani so nhyɛso: 20-25 mN/m

Saa nsonsonoe kɛse yi ma ɛhɔnom asase ani nhyɛso a ɛkɔ soro ba a ɛma ntama a atwa ho ahyia no twetwe fi nsu nketenkete no ho, na ɛma abon bere a ayow awie no.

2. Adwinnade 2 – abon a efĩ de ba

Akyinnye biara nni ho sɛ efĩ a ɛwɔ soro a ɛnyɛ den pii (silicone micro-droplets, srade) wɔ hɔ wɔ ade a wɔde nkata ade so anaa baabi a wɔyɛ adwuma no mu. Saa efĩ yi yɛ mmeae a ɛnyɛ den pii wɔ sini a ɛyɛ nsu no so. Wɔ Marangoni nkɛntɛnso no ase no, ade a wɔde nkata so sen fi saa mfinimfini yi kɔ abɔnten, na ɛma adwenemhaw ba.

• Nsu a ɛyɛ hyew a ɛkɔ fam no ma adwenemhaw ahorow no tumi sa wɔn ho yare denam adhesive backflow so.

• Nsuo a ɛyɛ ntɛmntɛm dodo no ma nsuo no ntumi nkɔ nsuo mu ansa na ayɛ yie – wɔato abon no mu daa.

3. Adwinnade 3 – dewetting craters fi nsu a ɛnnɔɔso

PTFE substrates wɔ soro nhyɛsoɔ a ɛho hia a ɛyɛ 18–20 mN/m pɛ – wɔ aboboano a ɛyɛ yie a ɛbɛtumi aba no so pɛɛ. Silicone adhesive no hia mfɛnsere a ɛnyɛ den a ɛdɔɔso na ama atrɛw na ayɛ nwini wɔ soro wɔ thermodynamically. Sɛ aduru a wɔde hyɛ mu no yɛ hyew ntɛmntɛm dodo a, ade a wɔde nkata so no hwere nsu ansa na ayɛ nsu koraa. Bere a ɛreyow no, volume shrinkage ne surface tension hyɛ adhesive no ma ɛtwetwe, na ɛma micro-craters wɔ mmeae a nsu nkɔ yiye – a wohu sɛ pockmarked surface.

Ano aduru – Sɛnea Wobedi Volatilization so ama Defect-Free Coating

solvent volatilization kwan a eye sen biara no de gradient kari pɛ di dwuma :

1. Ɔkwan a wɔfa so de drying a ɛwɔ afã abien

2. Nneɛma a wɔde yɛ nnuru a wɔde afrafra

Fa nnuru a wɔde afrafra a ɛsono sɛnea ɛbobɔ di dwuma:

• Nneɛma pa a ɛbobɔ kɛse, ɛyɛ brɛoo (toluene, xylene, anaa aromatics/esters a ɛbobɔ kɛse) – ade titiriw – hwɛ hu sɛ ɛtumi nwura mu na ɛma ɛyɛ pɛpɛɛpɛ bere a ɛfata.

• Nneɛma nketenkete a ɛyɛ medium/low-boiling fast-drying solvents – afrafra de asiesie ahoɔhare a ɛyow nyinaa.

3. Gradient ɔhyew control wɔ drying oven

• Ɔhyew a ɛba fam wɔ inlet – brɛoo mfiase volatilization ma leveling.

• Medium temperature wɔ mfinimfini beae – controlled drying.

• Ɔhyew a ɛkorɔn wɔ exit – awiei ntɛmntɛm shaping.

Kwati ɔhyew a ano yɛ nnam wɔ ɔfã a ɛkɔ mu no – eyi ma wo honam ani yɛ hyew ntɛm ara.

4. Nneɛma a wɔde boa

• Control ambient humidity – siw nsuo a ɛbɛtɔ wɔ wet film no so ano.

• Online corona treatment of the PTFE substrate – ɛma ahoɔden a ɛwɔ soro no kɔ soro, ɛma nsuo a ɛyɛ nwini tu mpɔn, ɛtew nsuo a ɛwɔ amena mu no so.

Nsɛm a Wɔaboaboa Ano – Nneɛma Titiriw a Wɔde Di Dwuma a Ɛfa Coating Quality Ho

Aokai PTFE optimizes coating parameters – solvent blend, drying profile, ne substrate pretreatment – ​​de yɛ PTFE tape a ɛyɛ mmerɛw, sintɔ biara nnim adhesive layers. Di yɛn ho nkɔmmɔ na woanya nhyehyɛe mmoa anaasɛ amanneɛbɔ coating specifications.

Atifi hɔ nsɛm no yɛ nea wɔde ama Jiangsu Aokai Nneɛma Foforo Mfiridwuma Co., Ltd.

Sɛ wopɛ sɛ wusua pii fa nsɛm a ɛkɔ akyiri, dwumadie tebea ne ano aduru a wɔayɛ ama yɛn nneɛma nyinaa ho, a PTFE ntama a ɛyɛ hyew a ɛkorɔn, PTFE teapɔn a ɛyɛ hyew kɛse, PTFE mesh abɔso, seamless bonding machine belts, PTFE ntama a ɛwɔ afã biako, conveyor belts a ɛko tia ɔhyew a ɛkorɔn ne fiberglass a ɛko tia ɔhyew a ɛkorɔn ka ho ntama, yɛsrɛ sɛ wo ne yɛn nni nkitaho:

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