I. Kurongeka Kwazvo kweKutonhodza Mwero
Teflon yakakwirira-tembiricha machira vagadziri vanoratidza kuti kutonhora mwero mutemo ndiyo yakananga uye inoshanda nzira yekudzora crystallinity. Mushure mekunge PTFE yanyungudutswa zvachose pamusoro pe380 ° C, cheni dzemamorekuru dzinoronga kuva crystal lattices kana ichipfuura nepakati peiyo yakanyanya crystallization rate tembiricha ye310 ~ 315 ° C panguva yekutonhodza. Chiyero chekutonhora chinotarisa chikamu chekristaro dunhu uye microscopic morphology yejasi.
1. Kukurumidza kutonhora (kudzima) kune yakaderera crystallinity
Iyo sintered jira pamusoro inokurumidza kutonhodzwa kuburikidza nemhepo inotonhora maketeni, inotonhorera rollers kana yakajairika-tembiricha matangi emvura. Maketani emamorekuru anoomeswa nechando asati agara akarongeka uye akarongedzerwa, achigadzira huwandu hukuru hwezviyo zvidiki uye zvisina kukwana zvekristaro. Iyo yakawanikwa yekuputira inoratidzira yakapfava mameseji uye yakanakisa kuomarara neyakagadziridzwa isiri-tsvimbo kuita, nepo kuomarara kwayo uye kupfeka kuramba kunoderedzwa zvishoma.
2. Kunonoka kutonhora (annealing) kune yakakwirira crystallinity
Chikamu chekuchengetedza kupisa chinorongwa pakubuda kwechoto chinopisa, kana kuti jira rinotonhodzwa pasi nechoto pachiyero chinononoka zvikuru che10 ~ 50 ° C / h. Izvi zvinobvumira kufamba kwakakwana kwemaketani emamorekuru kuti aumbe makuru uye akazara spherulites. Iyo yekupfekedza inozvirumbidza yakanyanya kuoma, yakasarudzika kupfeka kuramba uye yakagadzikana dimensional kugadzikana, asi nekudzikira kuchinjika uye kuwedzera brittleness.
II. Kubatsira Maitiro uye Material Control
Pahwaro hwekutonhodza mwero mutemo, anotevera ebetsero matanho anogona kuwedzera zvakanaka-tune iyo crystallinity yePTFE coating.
1. Sintering tembiricha uye kubata nguva
Nyaya yacho inofanira kupisa kusvika ku380 ~ 400 ° C uye inobata nguva yakakwana yekunyungudutsa zvachose makristasi ekutanga uye kubvisa nhoroondo yekupisa. Kusakwana sintering kunosiya kwasara crystal nuclei, zvichikonzera kunyanyisa kukwirisa uye kusagovaniswa kwekupedzisira kwekristaro.
2. Mushure mekurapa annealing
Nokuda kwekuputira nekristallinity yakaderera inowanikwa nekukurumidza kutonhora, kuwedzera kwekristal kukura uye kupera kwekushungurudzika kwemukati kunogona kuonekwa nekugara-kupisa kwehutano pa 300 ~ 320 ° C kwemaawa akawanda achiteverwa nekunonoka kutonhora, izvo zvinowedzera kuwedzera kuvhara crystallinity.
3. Raw zvinhu molecular uremu
High-molecular-weight PTFE dispersion inoratidzira yakakwirira yakanyunguduka viscosity uye yakaderera molecular cheni kufamba, zvichiita kuti iite zvishoma nezvishoma crystallization rate. Pasi pemamiriro akafanana ekutonhora, zviri nyore kugadzirira machira ane yakaderera crystallinity.
4. Nucleating agent kuwedzera
Chiyero chidiki (0.1% ~ 1%) ye inorganic fillers kana perfluorinated copolymers inogona kupa huwandu hukuru hwehterogeneous crystal nuclei uye kunyatsonatsa makristasi tsanga. Kunyangwe isingakwanise kushandura zvakanyanya crystallinity, inonyatso optimize crystal microstructure.
III. Yakakwana Management yeMulti-Layer Coating Production
Teflon high-temperature jira inogadzirwa neakawanda impregnation uye sintering process ine zvishoma nezvishoma yakaunganidzwa machira, inoda yakanangwa maitiro ekudzora sezvinotevera.
1. Interlayer crystallization consistency
Misiyano mikuru yakanyanyisa mukutonhodza mwero pakati pezvikamu zvinokonzeresa kusapindirana kwekristaro uye kuunza kushushikana kwemukati, zvichitotungamira mukuputira kupeuka mumatambudziko akaomarara. Zvinokurudzirwa kutora kutonhora kwakapfava kwezvikamu zvepakati, uye kushandisa kwakanangwa nekukurumidza kana kunonoka kutonhora chete kune yekunze layer zvinoenderana nezvinodiwa zvekugadzira.
2. Coating ukobvu maitiro
Makobvu machira anotambura neasynchronous kutonhora pakati pepamusoro uye yemukati layer. Iyo yemukati layer inoita kuti iite yakakwira crystallinity nekuda kwekunonoka kupisa kupisa. Izvo zvinodiwa kuti uwedzere zvakafanira nguva yekupisa kuti uve nechokwadi chekushisa chakafanana chejasi rese usati waita maitiro akabatana ekutonhodza.
3. Tension kuenzanisa panguva yekutonhora
Iko kunetsana kunoshandiswa pamucheka wejira panguva yekutonhora kwechikamu kunokanganisa kutaridzika kwemamorekuru maketani, ayo anoroora ane crystallization process uye pamwe anosarudza yekupedzisira crystal morphology uye dimensional kugadzikana. Kudzora kwakarongeka uye kwakaringana kunosungirwa.
IV. Quantitative Kuonekwa kweCrystallinity
Differential Scanning Calorimetry (DSC) inofanirwa kugamuchirwa kuti ione crystallinity mushure mekugadzirisa maitiro. A 5 ~ 10mg coating samples inopisa pamwero we10 ° C / min kuti uedze iyo inonyunguduka enthalpy. Iko crystallinity inoverengwa nekuparadzanisa yakaedzwa yakanyunguduka enthalpy ne theoretical melting enthalpy ye100% crystalline PTFE (inenge 82J / g). Yakasanganiswa nekukotama kuramba, kupfeka kuramba uye mamwe maedzo ekuita, iyo yakakwana process hwindo inogona kutsanangurwa.
General Operation Principles : Kuti uwane yakaderera crystallinity, shandisa pakarepo quenching mushure kuzara sintering; kuti uwane kupenya kwakanyanya, chengetedza tembiricha iri pedyo ne310°C ichiteverwa nekutonhora kwakanyanya mushure mekunyura kwakazara.
Izvo zviri pamusoro pehunyanzvi zvemukati zvinopihwa ne Jiangsu Aokai New Material Technology Co., Ltd.
Kuti uwane ruzivo rwakadzama pane yakadzama paramita, mamiriro ekushandisa uye yakagadziridzwa mhinduro dzemhando yedu yakazara yezvigadzirwa zvinosanganisira yakakwirira-tembiricha Teflon jira, Teflon yakakwirira-tembiricha inonamira tepi, Teflon yakakwirira-tembiricha mesh bhandi, seamless bonding muchina bhandi, single-sided PTFE jira, high-temperature tembiricha bhandi, yakakwirira-tembiricha inodzivirira ndapota inzwa wakasununguka kutibvunza pamhepo kana kubata hotline yedu yebasa.
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