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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.

牛仔洗水

牛仔服装以其独特的风格深受广大消费者喜爱。但是,牛仔织物的湿摩擦牢度相对较低,例如AATCC、ISO及国标规定儿童牛仔织物干湿摩擦牢度能达到2~3级就为合格品。随着社会的进步,人民对健康安全的向往,对牛仔织物提出了更高的要求,迫使牛仔布生产企业及牛仔洗水企业不断努力去提高牛仔布的湿摩擦牢度。
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牛仔服装以其独特的风格深受广大消费者喜爱。但是,牛仔织物的湿摩擦牢度相对较低,例如AATCC、ISO及国标规定儿童牛仔织物干湿摩擦牢度能达到2~3级就为合格品。随着社会的进步,人民对健康安全的向往,对牛仔织物提出了更高的要求,迫使牛仔布生产企业及牛仔洗水企业不断努力去提高牛仔布的湿摩擦牢度。

◆ 影响牛仔织物湿摩擦牢度的因素

① 颜色深度 织物的颜色越深,染料用量越多,被测样品越容易发生染料的扩散转移,染色布湿摩擦牢度就越差。

② 染料的特性 靛蓝染料分子的直接性越高,染料的分子量越大、极性越强、结构规整性越好,扩散性能则越差,染料越容易聚集在织物表面而不易向纤维内部扩散和转移,造成浮色过多。如果直接性太低,则影响固色率。

③ 浮色的影响 浮色包括已吸附在纤维上未参与纤维反应的染料和水解在纤维表面的染料,这些染料受到较外力时,很容易地从织物上脱离下来,从而影响染色织物湿摩擦牢度。

④ 坯布的组织结构与表面光洁度 织物的组织结构影响到织物表面的平滑程度,织物表面越平滑,摩擦测试时所受到的摩擦力就越小,染料越不易脱落。

⑤ 水质的影响 未与纤维发生反应的靛蓝染料,与水中钙、镁离子或其他盐类物质结合而成的不溶物,以物理吸附力沉积在织物表面形成色淀,影响染色织物的湿摩擦牢度。

◆ 提高牛仔织物湿摩擦牢度的措施

1. 为了使深色织物获得更好的效果,选择合适的湿摩擦牢度提升剂,利用高分子助剂的成膜性覆盖纤维表面,降低织物表面摩擦力,来提高湿摩擦牢度的等级,鸿盛的干湿摩擦牢度提升剂HS-201可以有效的提升牛仔织物的干湿摩擦牢度。

2.选择合适的靛蓝染料,提高染料与纤维的结合效率,强化染料与纤维化学键结合的充分性,减少纤维内外物理吸附染料的数量,以直接性中等为佳。

3.选择优良的坯布,尽量保证布面平整,同时加强水质的检测与控制,强化织物的前处理,优化染整工艺,进行充分的水洗和皂煮以洗净浮色及纤维屑。

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