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2022 Spring Festival Holiday Notice
After 17 years of unremitting efforts, Hongsheng has gradually grown from "no ridge, no house" to a well-known chemical additives supplier and service provider in the denim industry. Today, on November 24, 2020, Hongsheng Biotech held a ribbon-cutting ceremony for brand upgrade and opening. Witness with us another glorious historical moment in the development of Hongsheng, share with us this hard work, this joy, and welcome the birth of another brand new career.
环保染料厂家对化学染料的应用浅析1.依据纤维性质挑选化学染料 各种纤维因为本身性质不同,在进行染色时就需求选用相适应的化学染料。例如棉纤维染色时,因为它的分子结构上含有许多亲水性的羟基,易吸湿膨化,能与反响性基团起化学反响,并较耐碱,故可挑选直接、还原、硫化、冰化学染料及活性等化学染料染色。涤纶疏水性强,高温下不耐碱,一般情况下不宜选用以上化学染料,而应挑选分散化学染料进行染色。 2.依据被染物用处挑选化学染料 因为被染物用处不同,故对染色制品的牢度要求也不同。例如用作窗布的布是不常洗的,但要常常受日光照耀,因而染色时,应挑选耐晒牢度较高的化学染料。作为内衣和夏天穿的淡色织物染色,因为要常常水洗、日晒,所以应挑选耐洗、耐晒、耐汗牢度较高的化学染料。
The role of the attachment of chemical dyes is to help chemical dyes develop their colors, improve the compatibility of chemical dyes and downstream resins, and protect the performance of chemical dyes. Usually the carrier resin is a strong polar resin, on the one hand, it can help color and increase the fluorescence efficiency; on the other hand, it has good compatibility with chemical dyes.
Environmental protection instant dyes have higher immediacy to cellulose fibers than other dyes. This is mainly because the content of the immediate dye is large, the molecular formula is linear, the symmetry is good, the conjugate system is long, the coplanarity is good, and the van der Waals force between the molecular structure of the dye and the chemical fiber is large. In addition, there are functional groups such as hydroxyl, methyl and formamide in the molecular structure of the immediate dye, which can form covalent bonds with the methyl groups in cellulose fibers and the methyl groups and hydroxyl groups in protein fibers to further improve the dye.
Environmental protection immediate dyes refer to dyes that meet the requirements of environmental protection and can be used in the production process. Environmental protection dyes should meet the following standards and have no or no impact on aromatic amines; the dye itself has no carcinogens, allergens, acute toxic side effects; indoor formaldehyde and purifiable heavy metals after application exceed the limit below the limit; no natural environment growth hormone; no continuous Organic chemical air pollutants; harmful organic chemicals that are not easy to cause environmental pollution; compounds that are not easy to cause environmental pollution; color fastness to washing and performance indicators are better than prohibiting the use of dyes.
The production process of environmental protection immediate dyestuffs in printing and dyeing factories is generally: two soaking and two padding-steaming (102~105℃, 45~60s)-water cleaning-(color preservation solution)-air drying. Roll-coil dyeing is the process of dipping textile fabrics in a pad-dyeing solution, rolling them, leaving them idle for a period of time under the condition of slow rotation, and then post-processing. Energy-saving instant dyes for polyester/cotton (polyester/viscose) textiles: polyester/cotton, polyester/viscose blended cotton fabrics and other chemical fibers with different characteristics are dyed in the same bath. This requires that the instant dyes have high-quality high-temperature reliability and Excellent improving power and repeatability, good color fastness and environmental protection characteristics.
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Anti-split agent

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