Yuav ua li cas Fiberglass Thermal Shrinkage cuam tshuam PTFE Daim kab xev Dimensional Stability

A PTFE daim kab xev uas shrinks, curls, los yog warps thaum siv yog ib qho kev ua tsis tiav. Lub hauv paus ua rau feem ntau taug qab mus rau ib qho kev ntsuas: qhov thermal shrinkage tus nqi ntawm fiberglass substrate.

Thaum PTFE sintering ntawm 360-400 ° C thiab nplaum curing ntawm 150-200 ° C, fiberglass ntaub undergoes thermal expansion thiab, qhov tseem ceeb tshaj, irreversible shrinkage los ntawm residual weaving kev nyuaj siab. Yog tias qhov kev ntxhov siab no tsis raug tshem tawm ua ntej txheej txheej, nws dhau los ua qhov tsis xws luag - ua rau daim kab xev kom qis, curl, lossis delaminate thaum rhuab.

Aokai PTFE siv tag nrho cov cua sov-teeb fiberglass substrates kom tshem tawm qhov teeb meem no. Kab lus no piav qhia txog lub hauv paus ua rau thermal shrinkage, nws cov kev cuam tshuam ntawm txhua theem ua, thiab cov txheej txheem tseem ceeb: pre-heat-set fabric nrog <0.5% shrinkage ntawm 400 ° C.

Lub hauv paus ua rau - Kev ntxhov siab los ntawm kev xaws

Thermal shrinkage fundamentally originates los ntawm sab hauv residual kev nyuaj siab sau thaum lub sij hawm iav fiber ntau kos duab thiab ntaub weaving. Fiberglass daim ntaub uas tsis tas yuav tsum tau ua kom sov yuav ua rau irreversible shrinkage ib zaug rhuab saum nws qhov kev ntxhov siab tawm qhov pib (zoo kawg nkaus shrinkage pib tshaj 300 ° C).

Ib qho kev tso tawm tsis tiav lossis tsis muaj kev ntxhov siab shrinkage yuav ua rau lub hauv paus zais teeb meem ua rau cov kab xev tsis ruaj khov. Qhov kev ntxhov siab no yog 'xauv' rau hauv cov qauv ntaub thaum lub sij hawm weaving thiab tsuas yog tso tawm thaum cua sov kom txaus.

Qhov cuam tshuam thaum PTFE Sintering - Qhov Tseem Ceeb

PTFE sintering kub nce mus txog 360-400 ° C, deb tshaj qhov pib kub ntawm fiberglass thermal shrinkage, ua rau theem no yog qhov tseem ceeb rau qhov kev ua tau zoo.

1. Locked shrinkage stress tsim latent dimensional defects

Yog tias ua tiav nyob rau hauv qis qis, daim ntaub fiberglass shrinks dawb thiab drastic, uas ua rau substandard ntev thiab dav qhov ntev. Yog tias muaj kev sib zog ntau dhau los txhawm rau txo qis, cov iav fibers raug yuam kom elongated. Nyob ib ncig ntawm 380 ° C, molten PTFE infiltrates thiab qhwv cov fibers stretched; Tom qab txias thiab shaping, lub latent shrinkage nyiam yog mus tas li xauv rau hauv lub substrate raws li loj residual tensile kev nyuaj siab. Thaum daim kab xev rov ua dua nyob rau hauv cov txheej txheem tom qab, qhov kev ntxhov siab seem no ua rau substrate shrinkage thiab ncaj qha ruins seem stability.

2. Tsis sib xws substrate flatness undermines txheej uniformity

Cov nqi thermal shrinkage tsis sib haum thoob plaws thaj chaw sib txawv (piv txwv li, ntug thiab hauv nruab nrab cheeb tsam) thaum lub sij hawm sintering ua rau deformations xws li wavy npoo, cupped margins, thiab nto bulges . Qhov tsis sib xws ntawm lub substrate ua rau cov nplaum tsis sib xws hauv cov txheej txheem tom ntej, yooj yim ua rau huab cua npuas los yog adhesion tsis zoo thaum lub sij hawm lamination, thiab indirectly deteriorating ob seem thiab functional stability ntawm tiav lawm tapes.

Impact Thaum Adhesive Curing - Secondary Stress Relief

Adhesive systems (silicone siab-sensitive adhesives, acrylic nplaum, thiab lwm yam) kho ntawm 150-200 ° C. Qhov ntsuas kub no yog qis dua sintering ntau yam tsis tau txaus los qhib qhov seem xauv qhov kev ntxhov siab hauv lub substrate, nqa ntau yam tsis zoo.

1. Secondary shrinkage ua rau nto defects thiab dimensional deviation

Thaum nkag mus rau hauv qhov cub curing, residual shrinkage stress nyob rau hauv lub substrate tso tawm thiab ua rau ntsuas daim kab xev shrinkage. Qhov no ua rau:

• Tshaj qhov dav txo

• Micro-cracks, txiv kab ntxwv tev kev ntxhib los mos, los yog cohesive tsis ua hauj lwm ntawm cov nplaum nplaum (raws li shrinkage tshwm sim ib txhij nrog kho)

• Longitudinal fluctuations nyob rau hauv nplaum thickness thiab wrinkling ntawm tso liners (vim tsis sib haum ntawm cov ntaub shrinkage ceev thiab txheej rau cov menyuam tawm tshaj tawm)

2. Thermal curling tshem tawm cov txheej txheem precision

Lub substrate txheej nquag cog lus nyob rau hauv rhuab residual kev nyuaj siab, thaum lub siab kho cov nplaum txheej muaj ib tug sib txawv coefficient ntawm thermal expansion, tsim kom muaj kev ntxhov siab tsis sib haum xeeb ntawm ob txheej. Daim kab xev curls tam sim ntawd thaum tev tawm los ntawm cov ntaub ntawv tso tawm los yog raug tshav kub thaum siv - ua tsis tau rau nteg thiab poob qhov loj me thiab kev ua haujlwm.

Kev ntxhov siab tas mus li tso tawm thaum siv kawg - Lub Sij Hawm Ntev

Residual shrinkage stress tsis tshem tawm tag nrho thaum lub sij hawm nplaum kho mob mus rau hauv daim ntawv thov khoom tiav. Nyob rau hauv qhov kub-kub npog, thermal lamination, los yog thermal cycling tej yam kev mob (xws li, 260 ° C hmoov txheej), daim kab xev shrinks maj mam thiab tsis tu ncua.

Qhov tshwm sim:

• Shifted masking ciam teb (cov kab foob txav mus)

• Ntug lifting lossis adhesion tsis ua haujlwm

• Ua tiav poob ntawm qhov ruaj khov

Qhov no yog vim li cas qee cov kab xev tsis ua haujlwm hauv thaj teb txawm tias tom qab dhau qhov kev tshuaj ntsuam thawj zaug - qhov kev ntxhov siab latent tau tso tawm maj mam dhau sijhawm thiab raug tshav kub.

Core Solution - Tshem tawm Shrinkage Ua ntej Sintering

Txhawm rau tsim qhov ruaj khov PTFE cov nplaum nplaum, yuam kev nro ncab thaum ua haujlwm tsis tuaj yeem daws cov teeb meem shrinkage hauv paus. Kev tshem tawm tag nrho ntawm fiberglass shrinkage yuav tsum ua tiav ntawm qhov chaw.

1. Aokai PTFE mus kom ze

1. Siv tag nrho cov cua sov-teeb (ua ntej-shrunk) fiberglass puag daim ntaub - thermal shrinkage tus nqi nruj me ntsis tswj hauv qab 0.5% nyob rau hauv kev sim ntsuas ntawm 400 ° C × 10 feeb (ntau dua cov qauv muaj rau cov qib hwm).

2. Ntxiv cov txheej txheem kub kub ua ntej tua hluav taws ua ntej PTFE impregnation lossis txheej - cia cov ntaub fiberglass ua kom tiav cov shrinkage dawb thiab tso tawm tag nrho cov kev ntxhov siab sab hauv ua ntej nkag mus rau hauv qhov chaw sintering.

2. Qhov tshwm sim

Thaum cov fiberglass npuag lub thermal shrinkage tus nqi txo qis, qhov sib txawv ntawm qhov sib txawv thaum lub sij hawm tom qab sintering thiab nplaum curing yuav tsuas yog los ntawm thermal expansion thiab contraction ntawm resin thiab nplaum txheej - nrog ib tug deb me me dua li residual stress-driven shrinkage. Qhov no fundamentally guarantees:

• Dimensional stability (ntev thiab dav)

• Nto flatness

• Thaum tshav kub kub tsis kam thiab kev cia siab rau lub sijhawm ntev

Aokai PTFE xaiv tsuas yog tag nrho cov cua sov-teeb fiberglass substrates nrog cov ntaub ntawv shrinkage tus nqi. Peb tuaj yeem muab cov ntaub ntawv xeem raws li cov neeg siv khoom xav tau.

Summary - Txoj Cai Pre-Shrinkage

Aokai PTFE pom zoo kom pre-heat-set fiberglass nrog shrinkage <0.5% rau tag nrho cov dimension-tseem ceeb daim ntaub ntawv. Rau cov neeg siv khoom uas xav tau qhov ntev ntev, peb muab cov qib hwm nrog shrinkage <0.3% ntawm 400 ° C.

Cov ntsiab lus technical no yog muab los ntawm Jiangsu Aokai Tshiab Khoom Siv Technology Co., Ltd.

Yog hais tias koj xav tau cov ncauj lus kom ntxaws specifications, daim ntawv thov scenarios thiab customized kev daws teeb meem rau peb tag nrho cov khoom lineup nrog rau PTFE high-temperature fabrics, PTFE high-temperature adhesive tapes, PTFE mesh conveyor siv, seamless fusing tshuab siv, ib leeg-sided PTFE coated daim ntaub, tshav kub-resistant conveyor txoj siv sia thiab high-temperature channel thov hu rau peb.

• Mr. Guo: +86 18944819998

• Mr. Liu: +86 13705266308

Peb txhawb nqa cov kev pabcuam kev ua haujlwm ntawm kev tshaj lij thiab kev ncaj ncees, mob siab rau muab koj cov kev daws teeb meem tag nrho hauv ib qho thiab saib xyuas kev txhawb nqa tom qab muag!