Fabric Desizing yog dab tsi?

Desizing yog hais txog cov txheej txheem ntawm kev tshem tawm cov khoom sizing los ntawm cov ntaub. Lub warp yarns ntawm fabrics xws li paj rwb, viscose, thiab hluavtaws fibers feem ntau yog me me ua ntej weaving. Thaum lub sij hawm dyeing thiab finishing txheej txheem, slurry tuaj yeem cuam tshuam qhov ntub dej ntawm cov ntaub thiab cuam tshuam kev sib cuag nrog cov fibers. Yog li ntawd, fabrics feem ntau undergo desizing ua ntej.

Paj rwb ntaub desizing muaj nuj nqi ntawm tshem tawm ib co impurities los ntawm fibers. Synthetic fibers tuaj yeem qee zaum ua rau tib lub sijhawm desizing thaum lub sijhawm ua kom zoo. Cov txheej txheem rau desizing ntau hom ntaub sib txawv nyob ntawm seb cov khoom siv sizing, thiab muaj plaub txoj kev siv ntau:

1. Enzyme desizing

Enzyme desizing belongs rau biochemical desizing nrog keeb kwm ntev. Cov txheej txheem fermentation ntxov tshaj plaws tau siv, thiab tam sim no siv cov tshuaj amylase. Rau cov ntaub nrog feem ntau cov hmoov txhuv nplej siab raws li cov khoom siv sizing, lawv tuaj yeem siv tau.

2. Acid desizing

Tsuas yog siv rau paj rwb ntaub desizing thiab tsis tshua siv ib leeg. Acid maj mam hydrolyzes hmoov txhuv nplej siab nyob rau hauv qhov tsim nyog, hloov mus rau hauv cov dej-soluble cov khoom uas yog thaum kawg ntxuav tawm los ntawm dej.

3. Alkali desizing

Txoj kev no yog siv rau PVA raws li cov slurries sib xyaw (nrog rau cov hmoov txhuv nplej siab) thiab PA raws li slurries. Txhua hom slurries yuav swell nyob rau hauv kub alkaline tov, thiab cov adhesion nrog fibers yuav xoob. PVA tuaj yeem yaj ib nrab thiab tuaj yeem ntxuav nrog dej kub.

4. Oxidizer desizing

Oxidizing tus neeg sawv cev oxidize lub slurry, degrade nws mus txog rau thaum lub molecular chains tawg, nce solubility, thiab tshem tawm nws tom qab ntxuav, ua rau nws tshwj xeeb tshaj yog haum rau PVA slurry.