PTFE high-temperature cloth siamtu professional Jiangsu Aokai New Materials chuan thuhmahruai kimchang tak a pe a ni. Fiberglass fabric PTFE dispersion hmanga impregnate dan hi fiberglass substrate-a polytetrafluoroethylene chu a ruala coat leh sinter theihna tur core technology a ni a, composite materials siamin temperature sang tak, electrical insulation leh non-stick performance nei a ni. Chutiang thil chu high-frequency copper-clad laminate, high-temperature non-stick conveyor belt, architectural membrane material leh field dang dangah te hman a ni nasa hle.
Basic process kimchang chu a hnuaia mi ang hian step pawimawh pasarih a awm a ni:
1. Fiberglass puan hmanga siam hmasak (Dewaxing / Desizing) .
Hei hi pre-treatment step pawimawh ber a ni. Textile sizing agent (a bik takin paraffin wax, starch derivatives) chu fiberglass filaments-ah weaving an tih laiin an khuh a; a paih kim loh chuan PTFE leh glass fiber inkara interfacial bonding chu nasa takin a tichhe dawn a ni.
· Main treatment method: Fabric hi 350~400°C-a thermal dewaxing atan high-temperature furnace kal tlangin a kal chhunzawm zel a, organic sizing agents zawng zawng chu fully oxidize leh decompose vek a ni.
· Follow-up handling: Dewaxed fabric chu tihlum a ni a, a chang chuan tui thianghlim emaw chemical solvent emaw hmangin silfai a ni a, chu chuan residual ash a paih chhuak a, chutah chuan a vawt a, chu chuan impregnation atana inpeih tawh puan dum thianghlim thianghlim tak a hmu thei a ni.
2. PTFE Emulsion siam dan tur
· Raw material: Concentrated PTFE dispersion a ni a, standard solid content 60% vel a ni.
· Mixing procedure: Stock dispersion chu deionized water hmangin target concentration (40%–55%) thlengin resin loading leh impregnation viscosity mamawh a zirin dilute tur a ni. Fiberglass-a wetting performance tihsan nan surfactant dik tak dah a ni a; a tul hunah viscosity siamrem turin thickener pawh dah tel theih a ni.
3. Naupai lai (Impregnation).
Core target chu PTFE emulsion chu fiber bundle leh woven fabric inkar interstice-a full penetration a ni.
1. Dip-Squeeze Method (A hman tam ber): Puan chu immersion rollers hmangin emulsion tank-ah a hnim kim theih nan kaihhruai a ni a, chutah chuan squeeze rollers pahnih kal tlangin a kal leh a ni. Coating weight hi roller nip pressure siamrem a, emulsion tam lutuk extrude leh resin uniform taka sem darh hmanga control a ni.
2. Doctor Blade Coating: Emulsion hi puan chung lamah metal blade hmangin theh darh a ni a, high-viscosity dispersions atan a tha hle.
4. A vawt
Impregnated fabric chu 100~150°C-a thawk low-temperature drying oven-ah a lut a.
· Temperature control note: Temperature sang lutuk chuan rang takin dense surface film a siam ang a, internal moisture chu a trapping ang a, chu chu vaporize in pinholes leh blisters a siam ang.
5. Sintering (Thermal Curing) hmanga tihdam theih a ni.
Puan hring chu 360~390°C (grade thenkhat tan chuan 400°C thleng)-a heat treatment atan high-temperature sintering furnace-ah dah nghal a ni.
· Mechanism: PTFE hi thermoplastic polymer a ni a. A melting point (327°C) aia sang zawk temperature-ah chuan PTFE particle te chu an melt, flow leh level out a, continuous film siamin, fiberglass surface nena mechanical interlocking leh adhesion an nei thei a ni.
· Stage division: Sintering zone hi heating ramp, constant-temperature sintering leh cooling segment-ah then a ni a, hei hian thermal degradation awm lovin particle fusion kimchang tak a nei thei a ni.
6. Multi-Cycle Impregnation & Sintering hmanga tihchhuah a ni
Impregnation-sintering cycle pakhat chauh hian pinhole chhiatna thlen thei ultra-thin coating a siam chhuak chauh a ni. Target coating thickness leh resin content (eg, high-frequency copper-clad laminate substrate tan 45%–65% resin loading) thlen theih nan impregnation → drying → sintering sequence kimchang chu vawi 2 atanga vawi 4 emaw a aia tam emaw tih nawn leh a ni. Cycle tin hian fiber gap a luah khat lehzual a, coating thickness a tipung a, a tawpah chuan pinhole nei lo dense composite sheet a siam ta a ni.
7. Enkawl hnua & Winding
1. Surface modification: Final sintering pass hnuah corona treatment emaw chemical sodium-naphthalene etching emaw hmangin substrate tichhe lovin surface adhesion tihchangtlun theih a ni a, chu chuan a hnu lama copper cladding emaw secondary coating emaw a ti awlsam thei a ni.
2. Edge trimming & winding: Fabric edge te chu trim dik takin an trim a, chutah chuan puan siam zawh tawh chu take-up machine hmangin uluk takin an hrual a.
3. Quality inspection: Thil siam zawh tawhte testing kimchang tak neih a ni a, chung zingah chuan basis weight, thickness, tensile strength, peel strength, dielectric constant leh visual surface defects te pawh a tel.
Core Process Control Points te chu a hnuaia mi ang hian a ni
Finished product quality chungchanga parameter pawimawh tak takte chu: complete desizing/dewaxing, full emulsion wetting, low-temperature drying zawi zawia, sintering temperature setting dik tak, leh impregnation cycle tam tak hnua coating density awm reng.
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