Dab tsi yog Reactive Dye?

Muaj ntau ntau hom dyes, Reactive dyeing tsum thawj tham txog reactive dyes, reactive dyes yog ib tug heev ntau thiab nquag siv dye.

Lub ntsiab lus ntawm reactive dyes

Reactive dyeing: Reactive Dyeing, tseem hu ua reactive dye, yog ib hom dyeing reacts nrog fibers thaum dyeing.Hom dye molecule no muaj ib pab pawg uas tuaj yeem ua rau cov tshuaj fiber ntau.Thaum lub sij hawm dyeing, cov dye reacts nrog cov fiber ntau, tsim ib tug covalent daim ntawv cog lus ntawm ob thiab ua ib tug tag nrho, uas pab txoj kev ceev ceev rau ntxuav thiab txhuam.

Reactive dyes yog tsim los ntawm niam txiv dyes, txuas pab pawg thiab cov pab pawg reactive.Lub dye precursor muaj azo, anthraquinone, phthalocyanine qauv, thiab lwm yam. Cov feem ntau reactive pawg yog chlorinated junsanzhen (X-type thiab K-type), vinyl sulfone sulfate (KN-type) thiab ob-reactive pawg (M-type).Reactive dye molecules muaj chemically active pab pawg, uas muaj peev xwm hnov ​​mob nrog paj rwb, ntaub plaub thiab lwm yam fibers nyob rau hauv aqueous tov los tsim ib tug ntau daim ntawv cog lus, kom cov tiav dyed ntaub muaj ib tug siab ceev ceev ceev.

Reactive dyes yog soluble hauv dej thiab tuaj yeem sib cog lus nrog cellulose fibers.Nws muaj cov xim ci, kev ua haujlwm zoo, tuaj yeem npog qee qhov tsis xws ntawm textile, thiab muaj soaping ceev ceev.Txawm li cas los xij, feem ntau cov dyes reactive tsis zoo rau cov tshuaj chlorine bleaching thiab rhiab heev rau acids thiab alkalis.Ua tib zoo saib xyuas huab cua ceev thaum dyeing lub teeb xim.Reactive dyes tuaj yeem zas paj rwb, viscose, txhob lo lo ntxhuav, ntaub plaub, nylon thiab lwm yam fibers.

Reactive Dyeing

Classification ntawm reactive dyes

Raws li cov sib txawv active pab pawg, reactive dyes yuav muab faib ua ob pawg: symmetric triazene hom thiab vinyl sulfone hom.

Symmetric triazene hom: Hauv hom reactive dye, tshuaj lom neeg ntawm cov tshuaj chlorine atom reactive ntau dua.Thaum lub sij hawm dyeing, chlorine atoms yog hloov los ntawm cellulose fibers nyob rau hauv ib tug alkaline nruab nrab thiab ua tawm hauv pawg.Cov tshuaj tiv thaiv ntawm cov dye thiab cellulose fiber yog bimolecular nucleophilic hloov cov tshuaj tiv thaiv.

Hom vinyl sulfone: Cov pab pawg reactive muaj nyob rau hauv hom reactive dye yog vinyl sulfone (D-SO2CH = CH2) los yog β-hydroxyethyl sulfone sulfate.Thaum lub sij hawm dyeing, β-hydroxyethyl sulfone sulphate raug tshem tawm nyob rau hauv alkaline nruab nrab los tsim vinyl sulfone pawg, uas yog ces ua ke nrog cellulose fiber thiab undergoes nucleophilic ntxiv cov tshuaj tiv thaiv los tsim covalent daim ntawv cog lus.

Cov saum toj no ob hom reactive dyes yog lub ntsiab reactive dyes nrog cov khoom loj tshaj plaws nyob rau hauv lub ntiaj teb no.Txhawm rau txhim kho qhov kho tus nqi ntawm reactive dyes, ob pawg reactive tau qhia rau hauv cov xim molecules nyob rau xyoo tas los no, hu ua dual reactive dyes.

Reactive dyes tuaj yeem muab faib ua ntau yam raws li lawv cov pab pawg sib txawv:

1. X-hom reactive dyes muaj dichloro-s-triazine active pab pawg, uas yog low-temperature reactive dyes, haum rau dyeing cellulose fibers ntawm 40-50 ℃

2. K-hom reactive dyes muaj ib pab pawg neeg monochlorotriazine reactive, uas yog ib tug high-temperature reactive dyes, haum rau luam ntawv thiab pad dyeing ntawm paj rwb ntaub.

3. KN hom reactive dye muaj hydroxyethyl sulfone sulfate reactive pawg, uas belongs rau nruab nrab kub hom reactive dye.Dyeing kub 40-60 ℃, haum rau dyeing paj rwb yob dyeing, txias stacking dyeing, thiab anti-dye printing tom qab xim;kuj haum rau dyeing hemp textiles.

4. M-hom reactive dyes muaj ob pawg reactive thiab muaj nyob rau nruab nrab kub hom reactive dyes.Qhov kub ntawm dyeing yog 60 ℃.Nws yog tsim rau paj rwb thiab linen nruab nrab kub dyeing thiab luam ntawv.

5. KE hom reactive dyes muaj ob pawg reactive thiab muaj rau kub kub hom reactive dyes, haum rau dyeing paj rwb thiab linen fabrics.Xim ceev ceev