PTFE high-temperature tape siamtu professional Jiangsu Aokai New Materials chuan professional kaihhruaina a pe a ni. SMT assembly-a PCB gold fingers venna atana PTFE high-temperature tape hman a nih chuan, reflow soldering hnua adhesive residue (tape peeling hnua gold finger-a sticky deposit awm) leh adhesive bleed (adhesive bleed (adhesive soften and overflows under high temperature, contaminating unprotected areas or PCB surfaces) te hi tape thlan dik loh emaw, inmil lo emaw avanga lo awm a ni ber process parameters te a ni. A hnuaia tarlan te hi solution hrang hrang systematic set a ni:
I. Adhesive Residue & Bleed atanga root Cause thlirletna
1. Adhesive Residue Adhesive hian cohesive failure (adhesive layer chhungril a tearing) emaw interfacial transfer failure (adhesive chu substrate atanga a inthen a, rangkachak kut zungtang a stick) emaw a neih chuan a thleng thin. Trigger tlangpui chu tape temperature resistance tling lo, aged adhesive, emaw peeling timing dik lo te hi a ni.
2. Adhesive Bleed Reflow temperature sang takah chuan adhesive viscosity chu nasa takin a tlahniam a, chu chuan fluidity nasa takin a tipung a ni. Lamination pressure leh capillary action hnuaiah chuan adhesive hian tape edge chu a overflow a. Hei hi adhesive coating thick lutuk vang te, temperature sang lutuk vang te, adhesive ngei pawh thermal creep resistance tha lo vang te a ni tlangpui.
II. Tape thlan dik – A Core Solution
PTFE tape pangngai hian SMT process-a thil tul lutuk chu a phuhruk thei lo. SMT gold finger protection atana a bik taka siam product te chu thlan tur a ni a, adhesive system performance chu ngaih pawimawh hmasak tur a ni:
Adhesive chi hrang hrang
Nihphung
Scenario-te rawtna siamte
Notes
Silicone Pressure-Sensitive Adhesive (Silicone PSA) hmanga siam a ni.
260–300°C thlenga lumna do thei, conformability tha tak
Lead-free reflow soldering atan hman lar ber
Low-outgassing grade quality sang tak tak chauh pawm theih a ni a; low-molecular silicone fractions chuan thisen a chhuah ang a, chutiang a nih loh chuan contamination a thlen ang.
Silicone tel lo / Acrylic hmanga siam a ni
Silicon tihbawlhhlawh theihna a awm lo
Silicon-sensitive process (a hnu lama painting/coating hnathawh) 1.1.
General heat resistance chu 200–260°C-ah tihkhawtlai a ni a; hman hmain peak temperature tolerance enfiah hmasa phawt ang che.
· Temperature Resistance Grade : Hun rei lote chhunga peak temperature resistance ≥ 300°C, continuous service temperature ≥ 260°C, lead-free reflow soldering (245–250°C) a peak temperature aia tam a ni.
· Adhesive Layer Thickness : Thickness sang zawk hi adhesion chak zawk nen a inang lo. Tape zawng zawng thickness 0.08–0.13mm nei duh zawk, thisen chhuah theihna nasa taka tihziaawmna turin thin yet high-cohesion adhesive layer nei.
· Anti-Bleed & Residue-Free Certification : SMT gold finger protection atana inhlan anti-bleed leh residue-free test report supplier te hnen atangin dil la, sample hmangin furnace test tak tak neih bawk ang.
III. Step ruk hmanga kalpui dan tur control Standard
· Complete degreasing: Gold finger leh a chhehvel PCB surface te chu sweat stain, oil contaminants leh flux residue awm lo tur a ni. Anhydrous ethanol emaw isopropyl alcohol (IPA)-a dip lint tel lo puan hmangin phihfai la, chutah chuan air-dry vek rawh.
· Dry substrate: Tape hman hmain PCB te chu moisture-free vek tur a ni.
2. Lamination: Zero Tension & Air atanga chhuak zawng zawng
· Tape chu stretch suh: PTFE substrate hian ductility tha tak a nei. Lamination laiin stretching hian internal stress a siam a, chu chuan temperature sang takah shrinkage a thlen a, chu chuan adhesive tearing, residue emaw positional bleed emaw a thlen thin. Tape chu rangkachak kut zungtang chungah natural takin flat la, initial adhesion atan press light rawh.
· Full air removal: Dedicated roller emaw hard scraper emaw hmangin a lai atanga a sir lehlamah unidirectional-in zawi zawiin nawr la, full compaction a awm theih nan. Air bubble trapped awm lovin edge adhesion kimchang tak enfiah rawh; bubbles te chu heat hnuaiah an zau a, tape kil te chu an chawi sang a, chu chuan adhesive overflow a siam thin.
· Alignment dik tak: Tape kil chu rangkachak kut zungtang kil nen a inmil emaw, 0.2–0.5mm (design a phal chuan) inset deuh emaw align rawh. Pad emaw via emaw khuh ngai suh, capillary siphonage hian molten adhesive chu pawn lamah a hruai lut ang.
3. Reflow Soldering: Temperature Profile tha zawk siam
· Tape temperature specification khauh taka zawm: Peak temperature leh total heating duration chu tape tolerance range chhunga awm reng turin board surface temperature tak tak teh rawh.
· Gentle heating ramp: Adhesive softening zone (150°C–200°C) i thlen hmain heating rate slow (<2°C/s) vawng reng tur a ni. Temperature spike na tak tak chuan adhesive chu rang takin a ti nem a, a viscosity a tichhia a, thisen nasa tak a chhuak thin.
4. Peeling Timing: Cold Peeling hian Results tha ber a pe chhuak thin
· Room temperature thlengin a lum kim vek ang: Soldering hnuah PCB temperature 50°C (ideally ambient temperature) hnuai lam a tlak hma chu tape i peel hmain nghak rawh. Adhesive hi temperature sang takah chuan a nem a, a cohesion hniam hle a; forced hot peeling awlsam takin layer separation leh residual glue a thlen thin.
5. Process Management: Shelf Life & Reuse Cycles te control dan tur a ni
· Apply leh process nghal tur: PCB laminated tape nei te chu reflow furnace ah an lut nghal tur a ni. Workshop-ah hian rei tak (darkar 24 aia rei) dah loh tur a ni a, chu chuan tui a luh loh nan leh leivut a awm loh nan.
· Furnace pass atan chauh hman theih: SMT high-temperature tape hi disposable consumable a ni. Furnace vawi khat kal hnuah tape chu a ṭha lo angin lang mah se, adhesive chu crosslinking leh aging a tawk tawh a; heating cycle vawi hnihna hian adhesive residue emaw adhesion failure emaw a thlen ngei ang. Double-sided mounted PCBs tan chuan first pass hnua second side process hmain tape thar nen thlak hmasa phawt ang che.
6. Hlawhchhamna Emergency Handling & Validation
· Minor residual glue disposal: Residue hmuhchhuah a nih veleh production tihtawp nghal rawh. IPA-a hnim lint-free puan hmangin zawi zawiin phihfai la; a nasat chuan professional cleaning atan board thawn thin. Hmanraw khauh tak hmangin scrape ngai suh.
· Tape thar qualification validation: 1:1 actual PCB hmanga full trial production neih. Furnace pass hnuah tape chu phelh la, 40–50x magnifier hnuaia rangkachak finger hmunte chu enfiah la, zero residue leh zero adhesive overflow tih finfiah rawh.
Professional leh integrity-oriented service philosophy kan zawm reng a, thinlung zawng zawngin one-stop industrial solutions leh ngaihtuahna senga customer service kan thawhpui zawng zawngte tan kan pe thin!
