Txoj hauv kev zoo tshaj plaws rau dye polyester npuag yog los ntawm kev siv cov dyes disperse nyob rau hauv High -Temperature High-Npaj (HTHP) dyeing txheej txheem, feem ntau ntawm 130-135℃(266-275℃F). Txoj kev no ua kom muaj kev sib sib zog nqus, zoo ib yam, thiab ntxuav- xim nrawm vim polyester yog hydrophobic, hluavtaws fiber ntau nrog cov qauv nruj me me uas tsuas yog qhib thaum qhov kub siab.
Vim li cas txoj kev no zoo tshaj:
* Polyester tsis muaj qhov chaw ionic (tsis zoo li paj rwb lossis ntaub plaub), yog li reactive, ncaj qha, lossis acid dyes yuav tsis ua haujlwm.
* Disperse dyes tsis yog -ionic, dej- cov xim tsis muaj kuab lom uas tuaj yeem tawg mus rau hauv polyester fibers thaum tshav kub.
* Ntawm ~ 130 degree, polyester lub amorphous cheeb tsam nthuav dav, tso cai rau dye molecules nkag mus.
* HTHP dyeing muab cov xim zoo tshaj plaws, qib siab, thiab ceev ceev.
Txheej txheem txheej txheem: HTHP Exhaust Dyeing (Batch Method)
1. Khoom siv
HTHP Dav Hlau lossis Mos Flow Dyeing Tshuab (kaw kaw lus ntsuas rau 140℃thiab 3-4 bar siab)
2. Cov kauj ruam tseem ceeb
| Kauj ruam | Cov xwm txheej | Lub hom phiaj |
| Kev nplawm | 80-90 degree, alkaline xab npum | Tshem cov roj, spin finishes, impurities |
| Dye Bath Setup | Disperse dye + dispersing agent + leveling agent + acetic acid (pH 4.5-5.5) | Xyuas kom ruaj khov dispersion & txawm dyeing |
| Ramping | Kub ntawm 60℃→ 130℃ntawm 1-2℃/ min | Tiv thaiv dye aggregation & barre |
| Nyob (Hold) | Ci ntawm 130-135 degrees rau 30-60 feeb | Cia tag nrho dye diffusion rau hauv fiber ntau |
| Txias & Rinsing | Txias rau 80℃→ txias yaug → soaping | Tshem tawm cov dyeing nto, txhim kho ceev ceev |
Alternative Eco-Txoj kev phooj ywg
Thaum HTHP yog tus qauv, cov kev xaiv ruaj khov tshiab tau tshwm sim:
1. Thermosol (Nruam) Dyeing
* Siv rau siab - ntim woven polyester (xws li, zam fabrics).
* Npuag padded nrog disperse dye → qhuav → ci ntawm 180-220℃rau 30-60 sec.
* Pros: ceev, siv dej tsawg.
* Cons: Tsawg haum rau knits; kev siv zog ntau dua.
2. Carrier Method (Atmospheric Dyeing)
* Siv cov khoom siv tshuaj (xws li benzyl benzoate) kom o polyester ntawm 100℃.
* Zam yog tias ua tau: Cov neeg nqa khoom feem ntau muaj tshuaj lom, tsw ntxhiab, thiab txo lub teeb nrawm.
* Feem ntau tsis siv lawm vim kev txhawj xeeb ntawm ib puag ncig thiab zoo.
3. Supercritical CO₂ Dyeing (Waterless)
* Siv CO₂ hauv lub xeev supercritical raws li cov kuab tshuaj zas (tsis muaj dej!).
* Pros: xoom dej khib nyiab, siab dye uptake, luv voj voog.
* Cons: Cov cuab yeej siv siab heev (piv txwv li, DyeCoo thev naus laus zis); txwv kev txais yuav.
Kev txiav txim siab tseem ceeb
* Npuag Kev Tsim Kho: Knits → siv lub tshuab nqus dej kom tsis txhob muaj kev puas tsuaj; wovens → dav hlau los yog thermosol.
* Blends: Rau polyester / paj rwb, siv ob - da dej los yog ib - da dej ob - cov txheej txheem nrog disperse + reactive dyes.
* Caw piv txwv: Khaws qis (1: 6–1: 10) txhawm rau txhim kho kev ua haujlwm thiab kev ruaj khov.
* Kev Xaiv Dye: Siv siab -zog disperse dyes rau cov xim tsaus nti thiab ceev ceev zoo dua.
