Kusaenzana kwePTFE kupfekedza kunotungamira kune mitsetse, pinholes, yero, kana kusawirirana kusiri-tsvimbo kuita. Kune maapplication akaita semabhandi ekuvharisa kupisa, mabhandi ekutakurisa, uye mabheji ekuburitsa, kufanana kwekupfeka kunobata zvakananga kunaka kwechigadzirwa uye hupenyu hwesevhisi.
Chii chinokonzera kusaenzana kupfeka? Mhinduro inotambanudzira nzvimbo ina: kupfekedza kugadzirwa, kupfekedza & sintering maitiro, substrate mhando, uye nharaunda yekugadzira.
Aokai PTFE yakagadzirisa zvinhu izvi muzviuru zvemafambisirwo ekugadzira. Ichi chinyorwa chinotsanangura chimwe nechimwe chinhu uye maitiro ekuzvidzora zvemhando yepamusoro, yunifomu PTFE-yakavezwa jira.
Kugadzira Parameter |
Ideal Range / Chinodiwa |
Nei Zvichikosha |
PTFE particle size |
0.15 - 0.35 μm (D50) |
Kugovera kwakafara zvakanyanya kunokanganisa kupinda kwe substrate uye kuita kwemafirimu |
Molecular uremu & viscosity |
Kuenzanisa - kwete zvakanyanya kana kuderera |
Abnormal slurry viscosity inodzivirira zvakananga kunyange kupararira |
Solid content |
60±2% (yakajairika pakuiswa) |
Yakanyanya kuoma yakasimba inokonzera kusaenzana kuderera panguva yekuoma |
Dispersibility |
Hapana agglomeration |
Kusaita dispersibility kunotungamirira kumasumbu emunharaunda uye kukanganisa kwekuputira |
Filler zvirimo (semuenzaniso, ceramic poda) |
Zvinoenderana, zvakapararira |
Inoshandura microscopic pamusoro pemamiriro ezvinhu; kusapindirana kwekuzadza kunokonzera kusiyana kwehukobvu |
Zano rinoshanda: Gara uchiyedza batch yega yega yePTFE emulsion yekugovera saizi yechikamu uye viscosity isati yagadzirwa. A 10% shanduko mune viscosity inogona kushandura coating pickup ne5-8%.
Hukama huri pakati pePTFE particle size uye coating yunifomu inowanzo tarisirwa pasi. Emulsions ine D50 pazasi 0.12 μm inoyerera zviri nyore, zvichikonzera kumucheto kwebead kuumbwa (kukobvu kunokora kumicheto) panguva yekuomesa. Emulsions ane D50 pamusoro pe0.4 μm inopinda fiberglass zvisina kunaka, zvichiita kuti pave nepamusoro peporosity uye isina simba fiber encapsulation. Iyo yakanakira huwandu (0.18-0.22 μm) inopa zvese zvakanaka kupinda uye yakatsetseka firimu kuumbwa. Chimwe chinhu chakakosha ndeye surfactant yemukati - yakawandisa surfactant inokonzera kupupa panguva yekunyura, kugadzira mabhuru emhepo anoputika achisiya craters. Kunyanya kushoma surfactant kunotungamira kune particle agglomeration uye 'maziso ehove' mune yekupedzisira coating. Kuti uwirirane, shanda nemutengesi mumwe chete emulsion uye kumbira batch zvitupa zvinoratidza D50, D90, uye surfactant percentage.
Aokai PTFE inoshandisa chete PTFE emulsion ine yakanyatsodzorwa particle size distribution (D50 0.18-0.22 μm, D90 <0.35 μm). Izvi zvinogonesa kupindirana kunoenderana uye kutsetseka kwepamusoro kupera pabatch yega yega yejira.
1. Coating Method Kuenzanisa
Nzira |
Principle |
Uniformity Level |
Pros |
Cons |
Dip coating |
Substrate inopfuura ne emulsion bath |
Pakati nepakati |
Yakanaka kunyorova kwese, fiber encapsulation |
Longitudinal streaks, makobvu micheto, nhete pakati |
Blade coating |
Precision chiremba blade metres coating |
Zvinodiwa - kuenzana kwepamusoro |
Smooth, dense coating, hapana pinholes / mitsetse |
Sensitive kune substrate flatness |
Spray coating |
Atomized spray application |
Murombo |
Yakanakira zvimiro zvisina kujairika |
Parameter-sensitive (kure, kudzvanywa), isina kukodzera kugadzirwa kwehuwandu |
Yakanyanya tsika muindasitiri: Yakasanganiswa maitiro - dip coating + blade coating - yakagamuchirwa zvakanyanya. Izvi zvinosanganisa kunyorova kwepamusoro kwe dip coating neyakatanhamara pamusoro pekuti yakati sandara kweblade coating, kuenzanisa fiber encapsulation simba uye kurongeka kwepamusoro.
2. Drying & Sintering Conditions
Parameter |
Mhedzisiro paUniformity |
Drying rate |
Kuomesa zvisina kuenzana (kukasira kana kunonoka zvakanyanya) kunokonzeresa kusaenderana ukobvu hwefirimu, kutsemuka, kana kudonha mamaki. |
Sintering tembiricha |
PTFE inofanira kunyunguduka kuita firimu rinoenderera pa 360-420°C . Tembiricha isina kuenzana inotungamira mukunyungudika kusingaenderani uye kuenzana |
Sintering nguva |
Nguva isina kukwana → kuumbwa kwemafirimu kusina kukwana; nguva yakawandisa → kutsvuka kana kupisa kwekupisa |
Tembiricha kufanana muovheni |
Nzvimbo dzinopisa/dzinotonhora dzemunharaunda dzinokonzera kutsauka kwemavara (semuenzaniso, kutsvuka kune dzimwe nzvimbo) |
Dip + blade yakasanganiswa maitiro ndiyo indasitiri chiyero chepamusoro-yekupedzisira PTFE machira ekupisa. Heino chikonzero nei: dip coating yoga inoburitsa 'meniscus effect' - iyo yekupfeka inokora kumacheto uye yakatetepa pakati nekuda kwekukandirana kwepamusoro kweemulsion sezvo jira rinobuda mubhavhu. Uku kusiyanisa-kune-pakati kusiyanisa kunogona kuita 15-20% yehupamhi hwese. Blade yekuputira yega, ichigadzira nzvimbo yakati sandara, inonetseka nekupinda - iyo PTFE inoramba iri pamusoro pasina kuvharira zvizere fiberglass fibers, zvichiita kuti isakanganise abrasion kuramba. Iyo yakasanganiswa maitiro: dip kuti upinde, wobva wapfuura pasi pechiremba chechiremba kuti ubvise zvakawandisa uye kuenzanisa pamusoro. Kuti uwane mibairo yakakwana, gaka reblade rinofanira kuiswa ku120-150% yekupedzisira inodiwa kukobvu yekuputira, kuverenga kune shrinkage panguva yekuomesa. Tembiricha profiling mukati mehovhoni inonyungudika yakakoshawo - 10 ° C gradient muhupamhi inogona kukonzera kuoneka mitsetse.
Factor |
Impact paCoating Uniformity |
Weave pattern |
Plain weave: tight texture, yakanaka dimensional kugadzikana, kutadza kupinza. Satin weave: yakasununguka chimiro, yepamusoro kupinda, yakakwirira adhesion. Twill: pakati. Weave density misiyano inokanganisa zvakananga emulsion kupinda. |
Surface contaminants |
Parafini yakasara, mafuta ekudhirowa/kuruka zvinokanganisa zvakanyanya kunyange PTFE kupararira uye kukonzera kukanganisa kwekupfeka. |
Kushata kwepamusoro |
Kukasharara kusingawirirani kunokonzera kuunganidza kwakashata (kukobvu munzvimbo dzakashata, dzakatetepa munzvimbo dzakatsetseka) |
Kurudziro: Pakushandisa kwepamusoro-kufanana (semuenzaniso, matepi ekuvharisa kupisa), shandisa satin weave fiberglass jira rine kupisa kwekuchenesa kuti ubvise zvese zvakasara zveorganic usati wapfeka PTFE.
Environmental Factor |
Optimal Condition |
Sei |
Tembiricha |
20-25°C |
Kusakwana tembiricha kunonetesa coating leveling performance |
Hunyoro hwehukama |
<60% (yakanaka: 40-55%) |
Humidity yakakwirira inokonzera mvura condensation mu emulsion, zvichiita kuti pinholes |
Kuchena kwemhepo |
Isina guruva (HEPA kusefa inokurudzirwa) |
Guruva rinofambiswa nemhepo rinonyura mukuputira, richigadzira kuremara kwepamusoro |
Kuyerera kwemhepo |
Inodzorwa, hapana yakananga dhizaini |
Kusaenzana kwemhepo kunokonzeresa kuomeswa kwemazinga pahupamhi hwejira |
Ruzivo runoshanda: Munguva yekunaya kwemvura kana mazuva ekunyorova kwepamusoro, funga nezvekushandisa dehumidifier muimba yekupfeka. Humidity pamusoro pe70% inowedzera zvakanyanya kukanganisa kwepinhole.
Pfupiso - Kuisa Zvese pamwechete
Factor |
Yakanyanya Yakakosha Kudzora Point |
Ideal Value/Range |
Kugadzira |
Particle size distribution |
D50 0.18-0.22 μm, D90 <0.35 μm |
Kugadzira |
Solid content |
60±2% |
Process |
Coating nzira |
Dip + blade yakasanganiswa |
Process |
Sintering tembiricha kufanana |
±5°C pahupamhi hweovheni |
Substrate |
Weave pattern |
Satin weave yekufanana-yakakosha maapplication |
Substrate |
Pre-kurapwa |
Kupisa-kucheneswa, kusasara-pasina |
Environment |
Tembiricha & mwando |
20-25°C, RH <60% |
Muchidimbu , kupfekedza kufanana kwePTFE jira rekushisa kwepamusoro kunoenderana nezvinhu zvina zvakabatana. Coating magadzirirwo (particle size, viscosity, solid content) ndicho chikonzero. Iyo yekuputira uye sintering maitiro - kunyanya kushandisa dip + blade yakasanganiswa - ndiyo nhanho yesarudzo. Substrate mhando uye pre-kurapa inopa hwaro. Nzvimbo yekugadzira inovimbisa kuenderana.
Zvekukumbira zvikumbiro zvinoda kufanana kwepamusoro (semuenzaniso, matepi ekusunga chisimbiso, kuburitsa marangi ezvigadzirwa zvinonamira), dip + blade yakasanganiswa maitiro ndiyo indasitiri yegoridhe mwero. Tarisa imwe neimwe parameter nguva dzose, chengetedza mamiriro ekunze akagadzikana, uye edza emulsions anouya ekugovera saizi yechikamu.
Unoda rubatsiro kuwana kunoenderana coating kufanana kwejira rako rePTFE? Aokai PTFE inopa tsika yekupfeka masevhisi uye maitiro ekubvunzana. Bata isu neako chinangwa chaunoda uye huwandu hwekugadzira.
Zviri pamusoro apa zvinopihwa ne Jiangsu Aokai New Materials Technology Co., Ltd.
Kana iwe uchida kuziva zvakawanda pamusoro pezvakatsanangurwa, mamiriro ekushandiswa, uye zvigadziriso zvakagadzirirwa zvemhando yedu yakazara yezvigadzirwa, zvinosanganisira PTFE high-temperature machira, PTFE high-temperature matepi, PTFE high-temperature mesh mabhandi, seamless fusing machine mabhandi, single-sided PTFE machira, high-temperature-temperature-temperature-temperature , ndapota inzwa wakasununguka kutibata nesu:
Kuomerera kune iyo sevhisi dzidziso yehunyanzvi uye kutendeseka, isu takazvipira kupa imwe-kumira mhinduro uye masevhisi ane hanya kune vese vatengi.
