Tuav lub zog - lub peev xwm ntawm daim kab xev nplaum los tiv thaiv kev ntxhov siab thiab nyob hauv qhov chaw tsis tu ncua, tshwj xeeb tshaj yog nyob rau qhov kub siab - yog ib qho kev ntsuas tseem ceeb tshaj plaws rau PTFE high-temperature adhesive daim kab xev . Kev tuav lub zog tsis zoo ua rau cov ntaub nplaum nplaum, nplaum nplaum, thiab cov khoom sib kis.
Lub hauv paus ntsiab lus tseem ceeb rau kev txhim kho tuav lub hwj chim yog ob npaug: txhim khu lub zog cohesive ntawm cov nplaum txheej thiab ntxiv dag zog rau kev sib tshuam ntawm lub zog ntawm cov nplaum thiab PTFE substrate..
Aokai PTFE tau optimized ob txheej txheej thiab kho txheej txheem kom ua tau zoo tuav kev ua tau zoo. Phau ntawv qhia no suav nrog kev daws teeb meem thoob plaws ob theem kev tsim khoom tseem ceeb.
Txheej txheej txheem Optimization – Tsim lub Foundation
Cov txheej txheem txheej ncaj qha txiav txim siab cov qauv, thickness uniformity, thiab kev sib koom ua ke nrog lub substrate - lub hauv paus ntawm kev tuav lub zog zoo.
PTFE nta tsis tshua muaj zog saum npoo (18-20 dynes / cm), ua rau cov nplaum txheej ua rau ib qho tev nyob rau hauv qhov kub thiab txias shear stress. Cov txheej txheem primer txheej yuav tsum tau ua ua ntej txheej txheej saum toj kawg nkaus.
Ultra-nyias primer zaj duab xis: Tswj cov zaj duab xis qhuav tuab li ntawm 0.5-2 μm - cov primer ntau dhau ua rau cov ciam teb tsis muaj zog uas txo qhov tuav lub zog.
Txaus ua ntej ziab: Ua kom tiav cov kuab tshuaj thiab ua tiav ua ntej condensation / crosslinking ua ntej txheej txheej, tiv thaiv primer hnyav tsiv mus rau hauv cov nplaum sab saum toj.
Kev kho hauv kab hauv kab + primer txheej: Ua kev kho mob ntshav qab zib hauv online lossis corona ntawm PTFE substrate tam sim ua ntej daim ntawv thov primer kom tsis txhob muaj kev cuam tshuam ntawm qhov ua kom nto.
Tuav lub hwj chim feem ntau nce nrog cov nplaum tuab, tab sis cov txheej tuab heev ua rau cov nplaum nplaum nyob rau hauv qhov kub thiab thim rov qab tsis muaj zog tuav kev ua haujlwm.
Optimal qhuav nplaum thickness: Silicone PSA ua tau zoo tuav lub zog ntawm qhuav thickness ntawm 30-60 μm.
High-precision txheej txheej: Txais cov txheej txheem comma, qhov txheej txheej tuag, lossis cov txheej txheem siab micro gravure kom ntev thiab transverse thickness kam rau ua nyob rau hauv ± 2 μm . Cov thickness tsis sib npaug ua rau muaj kev ntxhov siab, ua rau tawg pib ntawm qhov chaw thinnest thaum tuav lub zog ntsuas.
3. Adhesive kua pretreatment thiab pub system
Nqus defoaming: Degas nplaum kua hauv lub tshuab nqus tsev tom qab sib tov los yog ua ntej txheej kom tsis txhob nthuav cov voids thaum kho, uas ua raws li cov ntsiab lus pib tawg nyob rau hauv tas li load.
Nyob rau hauv-kab sib tov thiab maturation: Rau ob-tivthaiv silicone nplaum, xa ib tug zoo li qub tov khoom rau kev pub noj ncaj qha thiab tswj cov kua nyob rau lub sij hawm los xyuas kom meej tsis zoo li cov tshuaj tiv thaiv ua ntej thiab tshem tawm cov cheeb tsam tsis muaj zog cohesive.
Kev tswj kom huv huv: Muab cov taub hau txheej nrog cov ntaub ntawv pov thawj plua plav thiab lim kua nplaum ntawm 5-10 μm lim cartridges kom tsis txhob muaj cov impurities uas ua rau muaj kev ntxhov siab.
Curing Process Optimization - Xauv hauv kev ua tau zoo
Curing determines the final crosslink density, internal stress level, and residual small molecule content – which directly govern cohesive strength and high-temperature creep resistance.
1. Stepwise cua sov thiab multi-zone curing
Theem
Kub
Lub hom phiaj
Tsawg-kub hnyav tshem tawm
80-100 ° C
Volatilize hnyav nrog lub sijhawm nyob txaus; kom tsis txhob ntxov ntxov nto skinning trapping internal hnyav
Nruab nrab-kub shaping
120-140 ° C
Form ua ntej crosslink network, muab thawj zaug txhua yam muaj zog, ntxiv tshem tawm cov residual hnyav
High-temperature sib sib zog nqus crosslinking
150-220 ° C (kho tau los ntawm hom nplaum)
Ua kom tiav crosslinking; Kev tswj qhov kub thiab txias yog qhov tseem ceeb
Kev pom tseem ceeb: Cov cua sov ua kom yooj yim ua kom muaj kev sib txuam, ntom ntom peb sab hauv cov nplaum, xa cov kev tuav tau zoo dua qub piv nrog rau ib-theem high-temperature ci. Qhov kub tsis txaus ua rau tsis txaus crosslinking thiab ib txheej mos cohesive; overheating yuav ua rau cov nplaum aging los yog loj heev nyob rau hauv kev ntxhov siab los ntawm mismatched thermal shrinkage.
2. Kev kho mob tom qab kho thiab kev loj hlob
Nyob rau hauv kab tom qab-kho: Teem lub qhov cub txuas ntxiv ua ntej winding nrog qhov kub thiab txias me ntsis qis dua qhov siab tshaj qhov sib txuas ntawm qhov kub thiab txias kom ntev thermal keeb kwm thiab ua tiav cov tshuaj tiv thaiv crosslinking.
Yob maturation curing: Muab cov ntaub qhwv lub qhov txhab rau hauv qhov cub qhov kub tsis tu ncua ( 40-60 ° C rau 24-48 teev ) rau kev khaws cia zoo li qub. Cov txheej txheem no:
Ua kom tiav cov residual crosslinking cov tshuaj tiv thaiv maj mam
Relaxes sab hauv kev ntxhov siab tsim los ntawm kev sib txuam thermal expansion ntawm substrate thiab nplaum
Zoo heev txhim kho lub sij hawm ntev load-bearing kev ua tau zoo nyob rau hauv siab kub
Staged nro annealing: Siv me ntsis cyclic nro rau dov daim kab xev thaum loj hlob los pab kev ntxhov siab tso tawm.
3. Curing cua thiab kev tswj ib puag ncig
Low-humidity environmental management: Rau condensation-kho silicone adhesive, nruab nrab ambient noo noo koom nyob rau hauv crosslinking, thaum cov av noo ntau heev ua rau sai sai skinning thiab hinders sib sib zog nqus curing. Ntxiv-kho silicone nplaum yuav tsum nruj cais cov sulfur thiab nitrogen-muaj cov tebchaw los tiv thaiv catalyst lom.
