Efεkt כf Envayroment Humiditi pan PTFE Emulshכn Impregnashכn

Insay di aktual prodakshɔn prɔses fɔ PTFE ay-tɛmpracha klos we Jiangsu Aokai Nyu Matirial dɛn mek, dɛn kin kɔntrol di envayrɔmɛnt humiditi insay wan spɛshal rɛnj we na 40%–60% RH , we dɛn jɔyn wit tɛmpracha rigyuleshɔn. di evaporeshכn rεt dεn adjכst fכ bi sכmtεm lכw pas di kapilari transpכt rεt fכ wata insay di emulshכn insay di kapilכ nεtwכk, we de mek sכh se ful pεnεtreshכn εn lεvεl di emulshכn we i de ajɔst fכ difεkt-fri, hεli dεns PTFE sintered film dεm.

Di kor inflכεns כf envayroment humiditi pan PTFE εmulshכn impregnashכn de insay di dinamik bεlε bitwin wata εvapכreshכn rεt εn εmulshכn stεbiliti. PTFE emulshכn na tipikli wan nכn-Nyutonian fכluid we kכmכp fכ PTFE rεsin patikyula dεm (dispersed fεz), sכfaynt, stεbyulayz, εn wata (kכntinyu fεz). as envayroment paramita, humiditi de rεgεl di volatilization kinetics fכ di sכlvεnt (wata), we de εksyεrt fכndamεntכl ifekt dεm lεk dis:

1. Fכndamεntכl Ifεkt dεm pan di Impregnashכn Prכsεs

di impregnashכn stej nid di emulshכn fכ effektivli pεnεtrate insay di pores כ fayv gap dεm na di sabstεrayt (εgz., glas fayba klot, mεtal mεsh).

Low humidity environment : Wata de evaporate tu kwik, we de mek di emulshɔn 'surface-dry' kwik kwik wan pan di sabstret. dis de inkrεs di apεrεnt viskositi fכ di emulshכn na di intafεys, we de hεndεr kapilari pεnεtreshכn fכ di rεsin patikyula dεm insay di dip sabstεrayt εn i de rεsult in 'insufficient impregnation' — dat na, rεsidyual εya pכket dεm insay di sabstεrayt. pan tap dat, kwik evaporeshכn de pul bכku כt, we kin mek di lokal tεmprachכ dכp wan wan, destabiliz di emulshכn tεmכdaynamik wan εn indyuz sכfaynt prεsipitashכn, we de mek 'כrεnj pil' כ nכ ivin tik insay di impregnated layεr.

di hכy humiditi envayroment : Wata evaporeshכn de inhεbit, εn di emulshכn de rεst insay lכw-viskositi wet stet pan di sabstεrayt fכ lכng tεm we pasmak. fכ vεtikal כ inklin sabstεrayt dεm, sagging kin izi fכ apin כnda graviti; fכ hεli haygroskopik sabstεrayt dεm, hכy humiditi kin hεndεr gas dischaj insay di sabstεrayt, fכm maykrobכbul dεm we de divεlכp to pinhol dεfεkt dεm we dεn de sinta afta dat.

2. Fɔndamɛnt Ifɛkt pan Faynal Film-Fɔm Kwaliti

PTFE film fכmeshכn jεnarali involv tu stej: drying (wata rimobul) εn hεy-tεmpratura sintering (partikl mεlt). Humiditi de mεnli afekt di strכkchכ fכ di grεn bכdi we i de drε, we de 'inhεrit' insay di fayn sintered film.

Krak εn intanεt strεs : Film fכmeshכn fכ PTFE rεsin patikyula dεm de dip pan kapilari prεshכn di tεm we wata de εvapכret fכ kכmprεs patikyula dεm insay wan dense pak layεr. di humiditi we lכw pasmak de mek shap inkrεs pan di kapilari prεshכn grεdiεnt εn di shrinkage fכ drε fast pasmak, we de jεnarεt big tεnsil intanεt strεs insay di grεn bכdi. biכs PTFE nכ gεt sεlf-hεlin abiliti bifo i sinter, dis kayn strεs de mek dεn kכl maykrokrak כ makroskopik krak na di grεn bכdi dairekt wan. Dɛn krak krak ya nɔ kin kɔmɔt afta dɛn dɔn sinta, we kin mek di fim lik ɔ di mɛkanikal trɛnk kin ridyus.

Surfactant migration and residue : Surfactant (lɛk ɔltɛrnativ to perfluorooctanoic acid) we de insay kɔmɛshɔnal PTFE ɛmulshɔn dɛn de muv wit wata ɛvapɔreshɔn we dɛn de drɛy. wan ay humiditi envayroment de ekstend di drying winda, we de alaw inof tεm fכ di sכfaynt dεm fכ akumulet pan di sכfa, fכm wan 'sכfayshכn כyl slik' כ had skin. If dis layt nɔ fulɔp fɔ dikɔmpɔz ɔ volatilayz insay di fɔs sintering stej, i go kabɔnayz ɛn ɛnkapsul insay di film, we go mek i yɔlɔ, ridyus di density, ɛn signifyant wik adheshon bitwin PTFE ɛn di sabstret (poor intafacial bonding bikɔs ɔf kɔntaminant ayzolayshɔn).

Film density and porosity : Wan ideal PTFE film fɔ bi pinhol-fri ɛn dense. Di rayt we fɔ kɔntrol di humidity we de mek di mɔstɔ we lɛf na big denja. כnda ay humiditi, if dεn nכ pul wata kכmplit wan di tεm we dεn de hεt εn drεy stej, di rεsidyual mכsichכ de vaypa instantaneshכn di tεm we dεn de sinta (aprכks. 327–400°C) wit drastik vכlyum εkspεns, we de mek blowכl כ intalayεr blista dεm na di pat pan di mεlt film. di kכnvεshכn, כnda ekstrim lכw humiditi, rεpid surface drying de fכm wan sial skin we de blכk intanεt wata evaporeshכn, we de mek bak blista כ delamination we dεn de sinter bikoz fכ di akumulet vapour prεshכn.

In prinsipul, di inflכεns we envayroment humiditi gεt pan PTFE εmulshכn prכsεsin na εsεnsial wan intavεnshכn in wata εvapכreshכn kεnεtiks:

·  lכw humiditi (we dray pasmak)  kin mek: pwεl pεnεtreshכn, blכk lεvεl (shrinkage cavities), drying krak, εn di nεvεn distribushכn fכ di sכfaynt rεsidεns.

·  di hכy humiditi (we di mכsichכ pasmak)  kin mek: sag, di pinhol dεm de inkrεs, di sכfaynt fכ flot pasmak, blista afta dεn dכn sinter, εn di adheshon dεm we de rεdכks.

Di infɔmeshɔn we de ɔp na Jiangsu Aokai Nyu Matirial Tɛknɔlɔji Kɔmni, Ltd.

Fɔ ditayl paramita, aplikeshɔn sɛnɛriɔ ɛn kɔstɔmayz sɔlvishɔn fɔ wi ful prodak rɛnj, inklud PTFE ay-tɛmpracha klos, PTFE ay-tɛmpracha tep, PTFE ay-tɛmpracha mɛsh bɛlt, simlɛs laminating bɛlt, singl-sayd PTFE klos, ay-tɛmpracha rɛsistant glas fayv fabrik, ɛn ɔda tin dɛn,. duya kɔntakt wi:

·  Savis Hotlayn: Mista Guo 18944819998

·  Mista Liu 13705266308 ɔda pipul dɛn

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