＞ Physicochemical Properties ntawm Direct Scarlet 4BE

Direct Scarlet 4BEyog daj-liab thaum soluble hauv dej, txiv kab ntxwv thaum soluble hauv cawv, thiab me ntsis soluble nyob rau hauv acetone, uas ua rau ib tug ntshiab kaj liab kua.Yuav luag insoluble hauv ether.

＞ Specification ntawm Direct Dyes

Direct Scarlet 4BE yog cov xim uas tuaj yeem ua kom sov thiab rhaub hauv nruab nrab thiab tsis muaj zog daim ntawv cog lus nruab nrab yam tsis muaj kev pab los ntawm mordants.Direct dyes yog tsim los ntawm hydrogen bonding van der Waals quab yuam ntawm cov dyes ncaj qha thiab paj rwb fibers.Direct dyes muaj cov dej-soluble pawg xws li sulfonic acid pawg (-SO3H) los yog carboxyl pawg (-COOH) thiab lawv cov qauv molecular yog teem rau hauv ib linear duab.Cov qauv ntawm cov nplhaib uas muaj ntxhiab nyob hauv tib lub dav hlau, yog li cov dyes ncaj qha muaj kev cuam tshuam ntau dua rau cov cellulose fibers.Lawv tuaj yeem dyed ncaj qha rau hauv nruab nrab nruab nrab thiab tuaj yeem dyed ntev npaum li cov xim yog yaj hauv dej.Rau cov dyes ncaj qha nrog tsis zoo solubility, soda tshauv tuaj yeem ntxiv los pab yaj.Direct dyes tsis tiv taus cov dej tawv.Feem ntau ntawm lawv tuaj yeem ua ke nrog calcium thiab magnesium ions los tsim cov dej tsis sib haum, ua rau cov stains ntawm cov ntaub dyed.Yog li ntawd, cov dyes ncaj qha yuav tsum tau yaj hauv cov dej mos.Yog hais tias lub hardness ntawm cov dyeing dej siv nyob rau hauv ntau lawm yog siab, soda tshauv los yog sodium hexametaphosphate yuav ntxiv, uas yuav tsis tsuas pab yaj cov dyeing, tab sis kuj soften cov dej.