PTFE high-temperature fabric (PTFE-coated fiberglass) hi a siamna atana hman raw materials ang chiah chiah a ni. Component pahnih a pawimawh a, chungte chu PTFE resin/emulsion (coating) leh fiberglass substrate (reinforcement) te an ni. Either – metal ions, low-molecular-weight polymers, residual sizing agents, emaw alkali oxides-a bawlhhlawh awmte hian a hun hmain a tichhia thei a: yellowing, cracking, non-stick hloh, delamination, emaw insulation breakdown.
Aokai PTFE hian raw material thianghlim tak tak leh process control khauh tak a hmang a ni. He guide hian thianghlimna hian performance dimension tinte a nghawng dan leh demanding application tan a pawimawh chhan a sawifiah a ni.
PTFE Raw Material Thianghlimna – Eng bawlhhlawh nge awm?
PTFE-a bawlhhlawh awm tlangpui chu:
Unreacted monomers leh molecular-weight hniam polymer te an ni
Residual initiator leh dispersant (eg, PFOA) te chu 1.1.
Metal ion (thir, dar, sodium) te chu a rawn chhuak leh ta a.
Processing aids leh by-products te pawh a awm bawk
Purity sang zawk hian material chu ideal specification hnaih zawkah performance a pe thei a ni.
1. Heat resistance leh thermal stability
Metal ion (iron, copper, sodium) te hian PTFE thermal degradation atan catalyst chak tak angin hna an thawk a ni . 260°C aia rei rei tak service hnuaiah chuan trace metal bawlhhlawh pawh hian molecular chain breakage a ti chak a, chu chuan a hmain a ti chhe thei a, a ti chhe thei bawk. High-purity PTFE hian thermal decomposition temperature sang zawk a nei a, pure white a ni reng a, yellowing pawh a do tha hle.
2. Non-stick performance leh surface quality tha tak a ni
High-temperature sintering laiin low-molecular-weight polymer leh oily by-product te chu coating surface-ah an migrate a, precipitates an siam thin.
Non-stick property chhe: A chunglam chu a tacky a, processed materials (food, adhesive tapes)-ah a innghat duh hle.
Contamination risk: Food-grade leh medical application-ah chuan migrated precipitate hian product a ti bawlhhlawh thei a, hygiene standard pawh a tichhe thei bawk. Purity hi food-contact PTFE fabrics te tan chuan core indicator a ni.
3. Electric insulation hnathawh dan tur
Impurity ion (metal cations, halogen ions) te hian charge carrier hna an thawk a, volume resistivity leh breakdown voltage nasa takin a tihhniam a ni. Insulation sang tak hmanna (eg, electrical insulating gasket) atan chuan raw material thianghlimna hi a pawimawh hle. Thil bawlhhlawh avanga pores awm hian partial discharge a thlen thei bawk.
4. Chemical laka invenna leh compactness
Chemical media-a an inhnim chuan soluble impurities te chu a leach chhuak a, coating chhungah micro-pores a awm ta a ni. Heng chhiatna te hian corrosive gas leh liquid te chu fiberglass substrate chhungah a lut a, a ti chhe thei a, hei hian fabric-a barrier performance a tichhe thei a ni.
Fiberglass Substrate Thianghlimna – Alkali awm zat chungchang
Fiberglass hi silicon dioxide thianghlim a ni lo. A chemical composition hian heat resistance, mechanical strength, leh PTFE nena inzawmna a sawifiah a ni.
1. Alkali metal oxide awm zat – a thutlukna siamtu
Fiberglass chi khat a ni
Na2O + K2O A awm zat
Ziarang
E-glass (alkali tel lo) a ni.
<0.8% a ni.
Thianghlimna sang tak, electrical insulation tha tak, temperature sang takah chakna hloh slow – PTFE fabric tan standard
Alkali glass lian lo tak a ni
~12% a ni.
Cost hniam, heat resistance tha lo, temperature sang takah chakna a tlahniam nasa hle
Alkali sang tak nei glass a ni
>15% a ni.
Khua lum hnuaiah a chhe nghal vat a; alkali ion hian PTFE tihchhiatna a tichak a ni
Temperature sang takah chuan low-purity glass atanga alkali metal ion te hian fabric ngei pawh a tichak lo mai bakah PTFE coating degradation a tichak bawk a , overall failure a ti chak hle. Tin, medium/high-alkali glass hian moisture a absorb a, insulation resistance nasa takin a tlahniam bawk.
2. Sizing agents – bawlhhlawh dang
Fiberglass weaving-ah hian fibers venhimna atan sizing agents (starch, PVA, oil) hman thin a ni. PTFE coating hmaa lak chhuah kim loh chuan 400°C vel a sintering laiin residual organics te chu carbonize, decompose, gasify te an ni.
Surface defects: Yellow discoloration, black spots, blisters – thil siamte chu a lan dan enfiahnaah a hlawhchham.
Weak interfacial bonding: Carbon residue hian PTFE leh fiberglass inkara chemical leh physical anchoring a block a, service laiin delamination, blistering leh peeling a thlen thin.
3. Flexural fatigue do theihna
Fiberglass filaments chhunga micro air bubble leh crystalline impurities te hian fiber hrang hrangte tensile strength a ti tlem a ni. Bending repeated hnuaiah chuan heng defects te hi stress concentration point a lo ni ta a, fiber fracture hmasa ber a thlen a, flexibility leh flex life nasa takin a ti tlem bawk.
Thupui – Thianghlimna hian Performance Ceiling a siam
Raw material thianghlimna hian PTFE high-temperature fabric-te performance bulpui a dah a:
High-purity PTFE hian: service temperature sang ber (260°C+), hun rei tak chhunga non-stick stability, electrical insulation rintlak, leh food-contact compliance a tichiang a ni.
High-purity alkali-free fiberglass (E-glass, Na2O <0.8%) bakah sizing uluk taka lakchhuah theihna tur guarantee: temperature sang takah substrate chakna, dimensional stability, leh delamination tel lovin coating adhesion nghet tak.
Eng link-ah pawh thianghlimna tling lo chuan a hmaa a chhiat phah ang – yellowing, delamination, insulation breakdown, leh non-stick hloh – a bik takin dinhmun khirh takah: hun rei tak chhunga temperature sang, voltage sang, emaw faina khauh tak mamawhna hnuaiah.
Aokai PTFE hian PTFE emulsion thianghlim tak (metal ion hniam, oligomer tlem) leh E-glass fiberglass fabric (alkali tel lo, heat-a tihfai kim) chauh a source a ni. Material certification kan pe a, food-grade leh high-insulation application te pawh kan support thei bawk. Specification chipchiar zawk hriat duh chuan min rawn biak theih reng e.
