PTFE high-temperature cloth hi wire harnessing, transformer layer, motor winding, leh high-frequency circuit-ah te electrical insulation atan hman a ni nasa hle. Mahse temperature inthlak danglamna – freezing cold atanga extreme heat thlengin – a insulating behavior a tidanglam thin. 200°C-a PTFE puan hi i rinchhan thei ang em? 260°C aia sangah eng nge thleng?
A chhanna chu a nuanced hle. PTFE molecular structure hian a operating range tam zawkah insulation ropui tak a pe a, mahse 260°C aia sang chuan irreversible degradation a thlen thung. Tin, khaw lum chuan electrical property a tichangtlung laiin, coating chu a ti chhe thei hle bawk.
Aokai PTFE hian temperature extreme hrang hrangah insulation property a test tawh a ni. He article hian performance hi range pathum-ah a then a, chungte chu normal operating (-180°C to 260°C), extreme high (>260°C), leh low temperature (<0°C) te an ni a, resistivity, dielectric strength, leh practical implications chungchangah key data a awm bawk.
Normal Operating Range: -180°C atanga 260°C – Insulation nghet tak a ni
Hemi chhungah hian PTFE high-temperature cloth hian electrical insulation ropui leh nghet tak a vawng reng a – hei hi a industrial application zau tak thlawptu core advantage a ni.
1. Volume & Surface Resistivity a awm thei
Lum leh vawt tehna
Volume Resistivity (Ω·cm) a ni.
A awmzia chu a awmzia
A chhehvel (25°C) a ni.
10⊃1;7 – 10⊃1;8 a ni
A tha hle – insulator tha ber ber zinga mi
200°C a ni
10⊃1;⊃3 a ni a; – 10⊃1;4 a ni
Thil hman pangngai tam zawk aiin a la sang zawk hle
260°C a ni
>10⊃1;⊃2 tih a ni a; (hisap)
Application tam takah chuan a la function reng
Mechanism: Temperature sang chho zel hian resistivity a tlahniam ve ve a, a chhan chu temperature sang zawk hian PTFE molecular chain te thermal motion a tichak a, trace impurity carrier te migration a ti chak bawk. Mahse, 200°C-ah pawh PTFE hian engineering plastic tam zawk chu room temperature-ah a phak lo hle.
Surface resistance chungchanga hriat tur: Surface resistance hi ambient humidity-ah a hlauhawm hle. PTFE hi non-hygroscopic a ni deuh ber a; surface moisture chu temperature sang takah a evaporate a, high-humidity room condition aiin surface insulation stable zawk a pe a ni.
2. Dielectric chakna (Breakdown Voltage) a ni.
Temperature a san chuan a tlahniam thin. Aggravated molecular thermal movement hian electric-field-a chhiatna thleng thei thil chu a ti hlauhawm zawk a ni.
Room temperature atanga 200°C thleng hian hun rei lote chhunga dielectric strength chu velin a tlahniam a ni . 20%–40% .
Chuti chung pawh chuan, premium puan 0.1 mm vel a thuk chuan 200°C-ah kilovolt engemaw zat (a nih loh leh grade thuk zawk tan kilovolt sawm) a la tuar thei tho a ni – robust insulation capacity retained.
3. Dielectric Constant & Dissipation Factor – A inthlak danglamna tlem ber
Thilneih
A hlutna (-100°C atanga 250°C thleng)
Stability a ni
Dielectric awm reng (Dk) 1.1.
2.0 – 2.1 inkar a ni
A flat hnai hle
Dissipation factor (tan δ) a ni a, a chhuahna tur hmun a awm lo.
0.0002 – 0.001 inkar a ni
Ultra-low a ni
Hei hi a pawimawh chhan: PTFE-a molecular structure symmetric sang tak leh ultra-low polarization hian high-frequency & high-temperature service hnuaiah signal transmission nghet tak leh ultra-low heat generation a tichiang a ni. Hei hian PTFE chu atan a qualify a ni . high-frequency insulating material tha ber RF leh microwave hmanna atana
Aokai PTFE high-temperature cloth hi -50°C atanga 200°C range huam chhunga Dk (2.05±0.05) leh ultra-low tanδ (0.0002-0.0005) stable a nih avangin high-frequency transformer insulation atan customer-te chuan an tarlang a ni. Dielectric property test report dilna angin kan pe thin.
Extreme High-Temperature Range: 260°C aia sang – A chhiatna tihdanglam theih loh
PTFE-in hun rei tak chhunga service temperature a phalsak aia tam chuan physical leh chemical lama chhiatna tihdanglam theih loh a thlen a – reversible property variation a thlen lo.
Temperature Range a ni
Thil awmzia (Material State) a ni
Insulation dinhmun a awm
260°C – 327°C thleng a ni
PTFE coating hian a ti nem a; mechanical chakna nasa takin a tlahniam. Pawn lam stress emaw electric load emaw hian awlsam takin coating deformation leh puncture → combined mechanical-electrical failure a thlen a, core electrical parameters pawm theih a la nih pawhin
Rin tlak loh – puncture hlauhawmna
327°C aia sang a ni
PTFE crystalline melting point a thleng thei. Solid PTFE hi high-elastic emaw gel state ah a chang a, structural integrity a hloh thin
A hlawhchham vek mai
400°C aia sang a ni
Thermal decomposition na tak chuan trace hazardous gas a chhuah tir thin. Carbonization leh conductive passage te chu material chhungah a lo awm → volume resistivity nasa takin a tlahniam a, insulation chu a chhe vek
Hlawhchhamna famkim – conductive paths siam
Critical warning: Base fiberglass fabric hian a hmin hmain 550-750°C a tuar thei a, mahse bare uncoated fiberglass hian PTFE coating a chhiat hnuah moisture a hip awlsam a, high-voltage insulation atan independent takin a thawk thei lo.
A pung – temperature hniam chuan molecular chain movement a lock a, carrier migration a tikhawlo
electrical insulation a tha zawk Room temperature aiin
Dielectric chakna a ni
A pung – material chu a chhe thei lo zawk
Cryogenic insulation hmanna atan a tha hle
Mechanical lama inthlak danglam theihna
PTFE hian ~19°C-ah crystal phase transition a tawk a; -79°C hnuaiah chuan a brittle nasa hle
Bending emaw impact emaw hian PTFE coating a ti chhe thei → insulation defects a siam thei
Key takeaway: Temperature hniam takah electrical insulation tihchak ni mahse PTFE coating chu a brittle ta hle. Cryogenic application (eg, liquid nitrogen line, superconducting magnet) atan chuan puan chu -79°C hnuai lama sharp bending emaw mechanical stress emaw a awm loh nan enfiah rawh. Vawikhat a crack chuan electrical property eng pawh nise insulation integrity a bo thin.
Thupui – Insulation rintlak tak neih theih nan 260°C chhungah awm rawh
Temperature Range a ni
Insulation hnathawh dan
Mechanical State a ni
Thurawn pek a ni
-180°C atanga 260°C thleng a ni
A tha hle – a nghet, resistivity sang tak, hloh tlem
Flexible (-79°C hnuai lama brittleness awm leh awm loh en rawh)
Hman chhunzawm zel atan a him
260°C – 327°C thleng a ni
Degrading – soft coating hian a tichhe/puncture thei
Softening a ni
Rin tlak loh – sustained exposure pumpelh tur
327°C – 400°C thleng a ni
Hlawhchham hnaih – melting, structural loss
Gel/tui hmanga siam a ni
Electric hman tur a ni lo
>400°C a ni
Permanent failure – carbonization hian conductive path a siam thin
A chhe tawh
Catastrophic – thlak nghal rawh
In summary , continuous recommended working temperature (≤260°C) chhungah, temperature hian PTFE high-temperature cloth-a electrical insulation-ah nghawng tha lo tak a nei tlem hle. Volume resistivity chu 10⊃1;⊃3 aia sangin a awm reng a; 200°C-ah Ω·cm a ni a; dielectric constant chu 2.0-2.1 ah a awm reng a; dissipation factor chu 0.001 hnuai lam a ni. Hei hian PTFE hi high-temperature insulating materials stable ber zinga mi a siam a – a bik takin high-frequency application-ah chuan polymer dangte’n nasa taka an hlohna hmunah a hlu hle.
260°C aia a lum lutuk chuan insulation failure chu mechanical softening leh deformation atanga intan a ni a, a tawpah chuan electrical breakdown tluantlingah a lo chang ta a ni. 400°C aia sangah chuan carbonization hian conductive path nghet tak a siam a. 0°C hnuaiah chuan electrical property a tha zawk a, mahse mechanical brittleness hian coating a ti chhe thei a ni.
I temperature range atana insulation property guaranteed nei PTFE high-temperature cloth i mamawh em? Aokai PTFE hian -70°C atanga 260°C thlenga dielectric test data kimchang a pe a ni. I hnathawhna temperature, voltage, leh frequency mamawh te min rawn biak theih reng e.
