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Conventional Staining Methods And Water Solubility Of Cationic Dyes

Sep 15, 2017

    The conventional staining method of cationic dyes: Neutral bath staining: In order to avoid dyeing unevenness, cationic dyes can be added. Alkaline soap Bath dyeing: such as the use of olive oil soap or industrial soap, the amount of fabric weight of the $number, and dyes together dyeing. Acid bath: dyeing with dyes and acetic acid, the amount of acetic acid is the $number of fabric weight. In 50 ℃ staining, 70~80℃ stained 1h. After dyeing, with tannic acid and spit tartrate treatment, although can improve the wet fastness, but dyed silk luster and feel affected.Cationic Dyes

    Cationic dyes are a kind of textile dyes, also known as alkaline dyes and salt-based dyes. Soluble in water in a cationic state, mainly used in acrylic fiber dyeing. Not only for the dyeing and printing of acrylic and acrylic blended fabrics, but also for modified polyester, modified nylon and silk dyeing. Cationic Dyes

     The company's cationic dyes are mainly the following types: x: Suitable for acrylic dyeing, printing of the ordinary type. D: can be used for dye extraction. SD, CDP type: suitable for acrylic blended and modified polyester dispersed cationic dye. Its dispersibility and diffusion properties are excellent. Can be dyed with acid dyes in the same bath nitrile can spinning, and disperse dyes with bath dyeing nitrile, modified polyester polyester blended, without the need to add a precipitation inhibitor.Cationic Dyes

    Cationic dyes in aqueous solution to become cationic pigments, and silk in the ph value of about 7 when the anion is very strong, both through the combination of ions and dye. The amount of dye decreased gradually when the ph tended to acidic or alkaline. In other words, acids and alkalis have the opposite effect of H "and oh" in aqueous solutions, but they are similar to cationic dyes. The reason is that, in the presence of acid, the COO of the dye is more rapidly ionized than the dyes, and the dye cation is combined with the fiber one NH.Cationic Dyes

    And in the presence of alkali, if the ph value of slightly more than 7, because the alkali oh and fiber of a nh3q combined with the amount of dye increased, but thereafter, with the ph value increased, the presence of a large number of oh and cationic pigments in the bath, the formation of the following pigment acid. Although acid and alkali can be used as a slow dye, but in order to protect the silk fiber for the sake of using acid as good.Cationic Dyes