Yuav Ua Li Cas Tiv Thaiv Adhesive Residue & Adhesive Bleed of PTFE High-Temperature Daim Kab Xev Thaum Tiv Thaiv PCB Kub ntiv tes hauv SMT Mounting

Jiangsu Aokai Cov Khoom Tshiab, cov chaw tsim khoom ntawm PTFE high-temperature tape, muab kev cob qhia kev cob qhia. Thaum PTFE high-temperature daim kab xev yog siv los tiv thaiv PCB kub ntiv tes thaum lub sij hawm SMT los ua ke, nplaum residue (nplaum deposits sab laug ntawm cov ntiv tes kub tom qab daim kab xev tev) thiab nplaum los ntshav (adhesive softens thiab overflows nyob rau hauv kub kub, kis kab mob nyob rau hauv unprotected cheeb tsam los yog PCB nto) tom qab reflow soldering daim kab xev feem ntau yog los ntawm cov txheej txheem tsis zoo. Hauv qab no yog cov txheej txheem kev daws teeb meem:

I. Keeb Kwm Kev Ntsuam Xyuas ntawm Adhesive Residue & Bleed

1. Adhesive Residue  Nws tshwm sim thaum cov nplaum raug cuam tshuam tsis ua haujlwm (sab hauv tearing ntawm cov nplaum txheej) los yog kev hloov pauv tsis ua haujlwm (cov nplaum nplaum tawm ntawm lub substrate thiab lo rau cov ntiv tes kub). Tej yam tshwm sim muaj xws li qhov kub tsis txaus ntawm daim kab xev, cov nplaum nplaum, lossis lub sij hawm tev tsis zoo.

2. Adhesive Bleed  Lub viscosity ntawm cov nplaum poob qis heev nyob rau hauv reflow siab kub, ua rau drastic nce fluidity. Nyob rau hauv lub lamination siab thiab capillary nkaus, cov nplaum overflows daim kab xev. Qhov no feem ntau yog ntxias los ntawm cov nplaum nplaum ntau dhau, qhov kub thiab txias sai, lossis tsis zoo thermal creep tsis kam ntawm cov nplaum nws tus kheej.

II. Kev xaiv daim kab xev kom raug - Cov ntsiab lus daws teeb meem

Ordinary PTFE daim kab xev tsis tuaj yeem ua tau raws li qhov xav tau ntawm cov txheej txheem SMT. Cov khoom tsim tshwj xeeb tsim rau SMT kub ntiv tes tiv thaiv yuav tsum raug xaiv, nrog rau qhov tseem ceeb ntawm kev ua haujlwm nplaum nplaum:

 

· Temperature Resistance Grade : Lub sij hawm luv luv ntawm qhov kub thiab txias tsis kam ≥ 300 ° C, qhov kev pabcuam txuas ntxiv kub ≥ 260 ° C, deb tshaj qhov kub siab tshaj ntawm cov hlau lead-dawb reflow soldering (245-250 ° C).

· Adhesive Layer Thickness : Ntau dua thickness tsis sib npaug zog adhesion. Nyiam daim kab xev nrog tag nrho cov tuab ntawm 0.08-0.13mm, featuring nyias tsis tau high-cohesion nplaum txheej kom txo tau ntshav txaus.

· Anti-Bleed & Residue-Free Certification : Thov cov ntaub ntawv pov thawj los tiv thaiv cov ntshav thiab cov khoom seem tsis pub dawb rau SMT kub ntiv tes tiv thaiv los ntawm cov neeg muab khoom, thiab ua qhov ntsuas qhov cub nrog cov qauv.

III. Six-Step Process Control Standard

1. Pre-Lamination: Surface Cleaning & Pre-Thiab

· Ua kom tiav degreasing: Cov ntiv tes kub thiab ib puag ncig PCB qhov chaw yuav tsum tsis muaj hws stains, roj paug thiab cov khoom seem. So nrog lint-dawb daim ntaub dipped nyob rau hauv anhydrous ethanol los yog isopropyl cawv (IPA), ces tag nrho cov huab cua qhuav.

· Qhuav substrate: Xyuas kom cov PCBs tsis muaj dej noo tag ua ntej daim ntaub ntawv thov.

2. Lamination: Zero Tension & Tag Nrho Cov Cua Txias

· Tsis txhob ncab daim kab xev: PTFE substrate muaj ductility zoo. Stretching thaum lub sij hawm lamination tsim kev ntxhov siab sab hauv uas ua rau shrinkage nyob rau hauv qhov kub thiab txias, ua rau cov nplaum tearing, residue los yog positional los ntshav. Tso daim kab xev tiaj tus ib txwm hla cov ntiv tes kub thiab nias maj mam rau thawj qhov adhesion.

· Kev tshem tawm tag nrho cov huab cua: Siv lub siab tawv rau cov menyuam los yog tawv scraper thawb maj mam unidirectionally los ntawm qhov chaw mus rau ob sab kom puv compaction. Ua kom tiav ntug adhesion yam tsis muaj cua npuas; npuas nthuav dav hauv qab cua sov thiab nqa daim kab xev npoo, ua rau cov nplaum nplaum.

· Kev ua kom zoo meej: Muab cov kab kab sib txuas nrog cov ntiv tes kub los yog me ntsis inset los ntawm 0.2-0.5mm (yog tias tsim nyog). Tsis txhob npog cov ntaub qhwv los yog vias, vim tias capillary siphonage yuav kos cov nplaum nplaum sab nraud.

3. Reflow Soldering: Optimize Kub Profile

· Ua raws li daim kab xev ntsuas kub tshwj xeeb: Ntsuas qhov ntsuas kub ntawm lub rooj tsavxwm kom lav qhov kub siab tshaj plaws thiab tag nrho cov cua sov lub sij hawm nyob rau hauv daim kab xev ntev.

· Cov cua kub maj mam: Khaws qhov cua sov qeeb (<2 ° C / s) ua ntej mus txog thaj tsam nplaum nplaum (150 ° C - 200 ° C). Sudden sharp kub spikes sai soften cov nplaum thiab faus nws viscosity, ua rau mob hnyav.

4. Lub Sijhawm Peeling: Cold Peeling muab cov txiaj ntsig zoo

· Txias tag nrho rau hauv chav tsev kub: Tom qab soldering, tos kom txog thaum PCB kub poob qis dua 50 ° C (qhov zoo tshaj plaws ambient kub) ua ntej tev daim kab xev. Adhesive tseem mos thiab qis-cohesion ntawm qhov kub thiab txias; yuam kub tev tawm yooj yim ua rau txheej sib cais thiab cov kua nplaum seem.

· Peeling txheej txheem: Tev maj mam ntawm qhov qis 180 ° lub kaum sab xis nrog lub zog sib xws. Tsis txhob rub nyuaj yog tias muaj kev tiv thaiv.

5. Txheej txheem tswj: Tswj txee lub neej & Rov siv dua

· Thov thiab txheej txheem tam sim: PCBs nrog laminated daim kab xev yuav tsum nkag mus rau hauv lub reflow furnace sai. Tsis txhob cia lub sijhawm ntev (ntau tshaj 24 teev) hauv lub rooj cob qhia kom tiv thaiv kev nqus dej thiab plua plav.

· Kev siv ib zaug xwb rau qhov cub dhau: SMT daim kab xev kub kub yog cov khoom siv pov tseg. Txawm hais tias daim kab xev zoo li qub tom qab ib lub qhov cub dhau los, cov nplaum tau dhau los hla kev sib txuas thiab kev laus; ob lub voj voog cua sov yuav twv yuav raug hu ua cov nplaum residue lossis adhesion tsis ua haujlwm. Rau ob-sided mounted PCBs, hloov nrog brand-new daim kab xev ua ntej ua ob sab tom qab thawj zaug dhau.

6. Ua tsis tau thaum muaj xwm ceev tuav & validation

· Kev pov tseg cov kua nplaum me me: Tso tseg cov khoom tam sim ntawd thaum kuaj pom cov residue. So maj mam nrog IPA-dampened lint-dawb ntaub; xa cov laug cam rau kev ua haujlwm tu hauv cov xwm txheej hnyav. Tsis txhob khawb nrog cov cuab yeej nyuaj.

· Daim kab xev tshiab tsim nyog validation: Ua tag nrho sim ntau lawm nrog 1: 1 tiag PCBs. Tom qab qhov cub dhau lawm, tev daim kab xev thiab tshuaj xyuas cov ntiv tes kub hauv qab 40-50x magnifier kom paub meej tias xoom residue thiab xoom nplaum dhau.

Cov ntsiab lus saum toj no yog muab los ntawm Jiangsu Aokai Tshiab Materials Technology Co., Ltd.

Yog tias koj xav tau cov ncauj lus kom ntxaws, daim ntawv thov scenarios thiab cov kev daws teeb meem rau peb cov khoom lag luam tag nrho suav nrog PTFE high-temperature daim ntaub, PTFE high-temperature adhesive tape, PTFE high-temperature mesh belt, seamless heat press belt, single-sided PTFE fabric, high-temperature resistant conveyor belt, PTFE high-temperature mesh belt, seamless heat press belt, single-sided PTFE npuag, high-temperature resistant conveyor belt:

· Service Hotline: Mr. Guo +86 18944819998

· Service Hotline: Mr. Liu +86 13705266308

Peb ib txwm ua raws li kev tshaj lij thiab kev ncaj ncees-taw qhia kev pabcuam kev xav, ua siab dawb muab ib qho kev daws teeb meem thiab kev xav zoo rau txhua tus neeg koom tes!