1. Kev txhais
EPS stands rau expandable polystyrene ua npuas ncauj, dav siv nyob rau hauv nthuav ntim ua npuas ncauj, tiv thaiv ua npuas ncauj ntim thiab thermal rwb thaiv tsev boards. EPS foaming tus neeg sawv cev yog lub cev foaming nruab nrab ntim hauv EPS cov hlaws yas, uas ua rau cov hlaws yas ntim rau hauv cov npuas npuas. Nws tsuas yog ua rau lub cev hloov pauv ntawm cov kua mus rau roj yam tsis muaj tshuaj lom neeg.
2. Mainstream EPS Foaming Agent: Pentane (qhov kev xaiv tseem ceeb hauv kev lag luam)
Zoo tag nrho cov tuam txhab EPS hauv tsev tau txais kev sib xyaw ntawm n-pentane thiab isopentane; ib tug me me ntawm cov txheej txheem dhau los siv butane ua ib qho kev pab cuam. Freon tau ua tiav tag nrho.
n-Pentane / Isopentane (C₅H₁₂)
Boiling point nyob ib ncig ntawm 36 degree, heev volatile ntawm ambient kub. Nws vaporizes thiab nthuav tawm tam sim hauv qab cua sov ntawm 80-100 degree.
Thaum lub sij hawm tsim cov EPS hlaws raw cov ntaub ntawv, kua pentane yog pressurized thiab kaw hauv polystyrene pellets, accounting rau 3% mus rau 5% ntawm tag nrho cov luj ntawm hlaws dai.
Thaum tshav kub kub, cov pa roj hauv lub siab nthuav dav cov hlaws yas los ntawm 40 mus rau 60 npaug, tsim cov kab nrib pleb kaw kom tsim lub teeb yuag, poob siab-absorbent thiab thermal-insulating foam.
Butane (C₄H₁₀) Nws tau siv los ua cov khoom siv foaming thaum ntxov tab sis xa cov foaming tsis ruaj khov thiab kev tswj tsis zoo ntawm cov khoom tiav. Niaj hnub no nws tsuas yog sib xyaw ua ke me me rau qis -EPS kawg thiab tau hloov pauv ntau los ntawm pentane.
Cov khoom tsis siv lawm: CFCs thiab HCFCs, txwv thoob ntiaj teb rau ozone txheej depletion.
3. Tub Ntxhais Ob-Txoj Haujlwm Foaming Mechanism
Kev tsim khoom ntawm raw EPS hlaws Khoom Khoom PS pellets yog tsim los ntawm polymerizing styrene. Cov kua pentane nkag mus thiab yog ntim rau hauv cov pellets nyob rau hauv siab nyob rau hauv lub reactor, yielding "pentane-muaj cov EPS hlaws dai" expandable.
Ua ntej-expansion & mold forming High-temperature steam softens PS yas thiab sai vaporizes pentane trapped hauv cov hlaws dai, ua rau lub ntim nthuav dav heev. Cov hlaws nthuav dav tau ntim rau hauv pwm thiab steamed dua kom fuse nrog ib leeg. Tom qab txias, cov khoom EPS ua npuas ncauj yog tsim rau kev nthuav qhia cushioning, ntim ua npuas ncauj thiab kev tsim kho thermal rwb thaiv tsev panels.
4. Cov Khoom Tseem Ceeb & Cov Lus Qhia Txog Kev Nyab Xeeb
Flammability: Ob qho tib si pentane thiab butane yog Class A cov tshuaj phom sij heev. EPS cov rooj cob qhia yuav tsum tau ua kom muaj cua nkag, tawg - cov khoom siv hluav taws xob pov thawj thiab kev txwv tsis pub qhib hluav taws.
Ib puag ncig zoo: Zero ozone depletion muaj peev xwm (ODP=0), ntau dua eco- tus phooj ywg zoo dua li cov khoom qub qub.
Feem ntau pentane volatilizes maj mam tom qab foaming, tawm cov ntsiab lus tsis tshua muaj nyob hauv cov khoom ua npuas ncauj tiav.
5. Qhov cuam tshuam rau Kev Lag Luam Khaub Ncaws (Ntxiv los ntawm Q&A yav dhau los)
EPS ua npuas ncauj feem ntau yog siv rau cov ris tsho hnav tsis zoo, cov ntaub qhwv ntsej muag rau cov khaub ncaws thiab thermal ua npuas ncauj interlayers. Pentane foaming agents tau noj nyob rau hauv cov chaw tsim khoom ua npuas ncauj.
Cov tuam txhab tsoos tsho, luam ntawv & dyeing cov nroj tsuag thiab cov chaw ua haujlwm ntaub tsis txhob yuav cov pentane lossis foaming agents ncaj qha; lawv tsuas yog ua tiav cov ntawv ua npuas ncauj.
Cov ntaub ntawv nyoos rau cov ntaub npuag (polyester, polypropylene) muab los ntawm ethylene thiab propylene, uas yog ib qho kev sib cais ntawm cov saw hlau los ntawm pentane foaming agents.
6. Cov ntsiab lus luv luv
EPS foaming tus neeg sawv cev yog hais txog kev sib xyaw ntawm n-pentane thiab isopentane, qis- cov kua alkane boiling kaw hauv cov hlaws yas. Nws vaporizes thiab nthuav dav raws li cua sov, ua raws li cov tub ntxhais pabcuam rau ua npuas ncauj yas.
Yog tias koj muaj kev xav tau rau cov khoom siv tshuaj, thov koj xav tiv tauj peb hauv xov tooj lossis email. Peb tos ntsoov rau koj qhov kev nug.
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