Ndlela leyi Solvent Volatilization Rate yi khumbaka ha yona Khwalithi ya PTFE Tape Coating

Eka vuhumelerisi bya PTFE high-temperature tape , xinamarheti lexi nga ni ntshikelelo wa silicone xi cheriwa tanihi xitshunxo lexi sekeriweke eka solvent. Loko thepi leyi pfanganisiweke yi famba hi oven yo omisa, solvent ya khuluka, yi siya leyara leyi tiyeke yo namarhela. Mpimo lowu leswi swihumelelaka ha wona – solvent volatilization rate – i core process parameter leyi lawulaka loko ndzhawu yohetelela ya adhesive yi rhetela, yingari na swihoxo, naswona yitshama yirikarhi yi tiya, kumbe yifunengetiwe hi ti pinholes, craters, na streaks.

Aokai PTFE yi antswisile maendlelo yo peta eka magidi ya ku tsutsuma ka vuhumelerisi. Nkongomiso lowu wu hlamusela hilaha volatilization rate yi khumbaka leveling, pinhole formation, na crater defects – na ndlela yo lawula eka thepi ya xiyimo xale henhla ya PTFE.

Ndlela leyi Volatilization Rate yi khumbaka Leveling – The Viscosity Trade-Off

Leveling i vuswikoti bya film yo namarhela leyi tsakamaka ku herisa swirhendzevutani swo peta, swirhendzevutani leswi tsemakanyaka, na xivumbeko xa orange-peel, ku endla xivumbeko xo olova. Matimba lama susumetaka i ku tsana ka le henhla ka misava; ku lwisana na kona i viscosity.

1. Hiku hatlisa swinene – ku tshoveriwa ka nhlonge yale henhla swi yima ku levela

Loko solvent yi hatlisa swinene, nhlayo ya solvent ehenhla ka yona yihunguteka hiku hatlisa. Silicone PSA (polysiloxane solution ya timolekhuli ta le henhla) yi na vuxiyaxiya swinene eka nhlayo. Viscosity ya surface layer yi tlakuka hi xihatla – hambi kuri ku vumba high-viscosity 'skin' kwalomu ka xihatla.

Nkumba lowu wu khiya xinamarheti lexi nga horiwangiki lexi nga ehansi endhawini ya xona. Xinamarheti a xa ha swi koti ku khuluka ku level out streaks kumbe blade marks. Swivumbeko leswinga tshamisekangiki leswi endliwaka hinkarhi wa ku peta switshamisekile hilaha kunga heriki.

2. Ku nonoka ngopfu – ku sagging na ku dewetting

Loko solvent yi khuluka hiku nonoka swinene, adhesive layer yitshama yiri low-viscosity liquid kuringana nkarhi woleha swinene. Hambi leswi leswi swi pfumelelaka nkarhi wo levela, gravity yi vanga:

• Ku rhetela (xinamarheti xi tsutsuma xi ya ehansi eka swilo leswi yimisiweke) .

• Makumu yo tiya (swidziva swo namarhela emakumu ka ndzhawu leyi pfanganisiweke) .

• Ku susa mati – eka ti substrates ta low-surface-energy PTFE (critical surface tension ntsena 18-20 mN/m), ku tsakamisa nkarhi woleha kahle kahle swinga endla leswaku adhesive yihunguteka naku koka kusuka eka substrate, leswi onhaka ku olova ka le henhla.

Ndlela leyi Volatilization Rate Yi Vangaka Ti Pinholes Ha Yona

Ti pinholes i ti holes letintsongo leti hundzaka hi leyara yo namarhela. Tivumbiwa loko ti solvent kumbe ti air bubbles ti khomiwa naswona ti pfurha hi ndzhawu leyi tiyeke loko adhesive yinga se tlhela yi khuluka.

1. Endlelo ra 1 – ku vila solvent leyi khomiweke ehansi ka nhlonge

Loko thepi leyi pfanganisiweke yi nghena eka oven yo omisa, ku tlakuka lokukulu ka mahiselo loku hlanganisiweke na ultra-fast solvent volatilization swi horisa vuandlalo bya filimi ku sungula. Solvent leyi khomiweke endzeni ka leyara yi vaporize hi matimba, yi endla ti bubbles. Loko ntshikelelo wa le ndzeni wa bubble wu tshoveka nhlonge yale henhla leyi tiyeke, filimi ya mati leyi phatlukeke ayi koti ku tlhela yi khuluka no hola – leswi siyaka ti pinholes ta nkarhi hinkwawo kumbe ti craters leti fanaka na volcano.

2. Endlelo ra 2 – swiphemuphemu a swi koti ku baleka

Swiphepherhele leswintsongo swa moya switshama swi nghenisiwa hinkarhi wa ku peta na ku phameriwa hi adhesive. Ti lava nkarhi lowu ringaneke leswaku ti papamala ehenhla, ti pandzeka naswona ti hola eka viscosity yale hansi. Loko ndzhawu yale henhla yi hatlisa yiva na nhlonge hikokwalaho ka ku hatlisa ku oma, ti bubbles ati koti ku baleka naswona ti vekiwa tani hi ti pinholes.

3. Endlelo ra 3 – ku tsakama loku nga riki kahle ka ti micro-pits

Kusungula ka xihatla ka volatilization swipike adhesive viscosity swinene, leswi tsona solution eka vuswikoti byo tata micro-pits hiku nonoka naku hlongola moya wa interfacial. Leswi swi endla leswaku kuva na swihoxo swa dense pinhole-like wetting endzhaku ko omisiwa.

Ndlela Leyi Mpimo Wa Ku Pfuxetiwa Wu Vangaka Ti- Crater (Dimples) Ha Yona .

Ti craters i swiphemu leswintsongo, swa xirhendzevutani eka ndzhawu leyi namarhelaka, leswi hambaneke na ti pinholes. Swivangiwa hi local surface tension imbalances.

1. Endlelo ra 1 – mathonsi ya mati lama hlanganisiweke

Ku hatlisa ka solvent volatilization swi tswonga kuhisa lokukulu ka vaporization, swi kufumeta swinene filimi leyi tsakamaka na vuandlalo bya substrate. Loko mahiselo ya hunguteka ehansi ka ndzhawu ya mberha yale kusuhi, mpfula ya mati emoyeni yi hlangana yiva ti micro-droplets eka filimi leyi tsakamaka.

• Ku tsana ka le henhla ka mati: ~72 mN/m

• Ku tsana ka le henhla ka xinamarheti xa silicone: 20–25 mN/m

Kuhambana loku lokukulu ku endla leswaku kuva na local surface tension gradient leyi fambisaka adhesive leyi rhendzeleke kuva yi hunguteka kusuka eka mathonsi, leswi siyaka ti craters endzhaku ko oma.

2. Endlelo ra 2 – ti craters leti hlohloteriwaka hi swilo leswi thyakeke

Swilo leswi thyakeke swa low-surface-tension (silicone micro-droplets, grease) swi kona handle ko papalata eka adhesive kumbe ndzhawu yo tirhela eka yona. Thyaka leri ri endla tisenthara ta low-surface-tension eka filimi leyi tsakamaka. Ehansi ka Marangoni effect, adhesive yi khulukela ehandle kusuka eka ti centers leti, leswi endlaka leswaku kuva na depressions.

• Ku khuluka loku ringaneleke ku pfumelela ti depressions ku ti horisa hiku tirhisa adhesive backflow.

• Ku hatlisa ngopfu ka volatilization swi tsona mati lawa yanga khulukaka loko yanga se hola – ti craters ti pfaleriwile hilaha kunga heriki.

3. Ndlela ya 3 – ku susa mati eka ti craters kusuka eka ku tsakama loku ringaneleke

Ti substrates ta PTFE tina critical surface tension ya 18–20 mN/m ntsena – kahle eka threshold ya feasible wetting. Xinamarheti xa silicone xilava fasitere leri ringaneleke ra low-viscosity ku hangalasa naku tsakamisa ehenhla hi thermodynamically. Loko solvent yi khuluka hiku hatlisa swinene, adhesive yi lahlekeriwa hi fluidity loko yinga se tsakama hiku hetiseka. Hi nkarhi wa ku oma, kuhunguteka ka volume xikan’we na surface tension swisindzisa leswaku adhesive yi hlangana, leswi siyaka ti micro-craters eka tindzhawu letinga tsakama kahle – leti vonakaka tani hi pockmarked surface.

Switshuxo – Ndlela yo Lawula Volatilization ya Defect-Free Coating

Qhinga lerinene ra solvent volatilization ri tirhisa gradient balance : .

1. Ndlela yo omisa ya switeji swimbirhi

2. Tisisiteme ta swintshuxo leswi pfanganisiweke

Tirhisa nkatsakanyo wa swintshuxekisi leswingana tindzhawu to hambana hambana to vila:

• Ti solvents ta kahle leti virisaka swinene, leti khulukaka hiku nonoka (toluene, xylene, kumbe ti aromatics/esters leti virisaka swinene) – xiphemu lexikulu – switiyisisa ku n’oka xikan’we na nkarhi lowu ringaneleke wo levela.

• Nhlayo yintsongo ya ti solvents ta medium/low-boiling fast-drying – leti hlanganisiweke ku lulamisa rivilo hinkwaro ro oma.

3. Ku lawula mahiselo ya gradient eka oven yo omisa

• Mahiselo yale hansi eka inlet – slow initial volatilization kuva yi levela.

• Mahiselo yale xikarhi eka ndzhawu yale xikarhi – ku omisiwa loku lawuriwaka.

• Mahiselo yale henhla loko u huma – ku vumbiwa ko hetelela hiku hatlisa.

Papalata ku hisa lokukulu eka xiphemu xo nghena – leswi swivanga ku huma ka nhlonge hi xihatla.

4. Migingiriko yo pfuneta

• Lawula kutsakama ka ndzhawu – sivela ku hlangana ka mati eka filimi leyi tsakamaka.

• Vutshunguri bya corona bya online bya substrate ya PTFE – byi tlakusa eneji yale henhla, byi antswisa ku tsakama, byi hunguta ti dewetting craters.

Nkatsakanyo – Tinhla ta Nkoka ta Vulawuri bya Khwalithi ya Ku Peta

Aokai PTFE yi antswisa ti parameter ta coating – solvent blend, drying profile, na substrate pretreatment – ​​ku humelerisa PTFE tape leyingana ti adhesive layers to olova, letingariki na swihoxo. Tihlanganise na hina ku kuma nseketelo wa phurosese kumbe swihlawulekisi swa ku peta hi ku landza swilaveko swa wena.

Vuxokoxoko lebyi nga laha henhla byi nyikiwile hi Jiangsu Aokai Switirhisiwa Leswintshwa Thekinoloji Co., Ltd.

Loko u lava ku dyondza swo tala hi vuxokoxoko bya swihlawulekisi, swiyimo swa xikombelo na swintshuxo leswi endleriweke nxaxamelo wa hina hinkwawo wa swikumiwa, ku katsa na malapi ya mahiselo ya le henhla ya PTFE, tithepi ta mahiselo ya le henhla ya PTFE, mabandhi ya mesh ya PTFE, mabandhi ya muchini wo boha lama nga riki na swirhabyani, lapi ra PTFE ra tlhelo rin’we, mabandhi yo fambisa lama nga lwisaniki na mahiselo ya le henhla na fiberglass leyi nga tiyangiki hi mahiselo ya le henhla malapi, hi kombela u hi tihlanganisa:

• Nkulukumba Guo: +86 18944819998

• Nkulukumba Liu: +86 13705266308

Minkarhi hinkwayo hi seketela filosofi ya vutshila na vutshembeki, naswona hi tiyimiserile ku ku nyika swintshuxo swa xiyimo xin’we na vukorhokeri lebyi ehleketiweke.