Why are fabrics bleached? What are the common bleaching methods used in dyeing factories? After scouring, most natural and man-made impurities on the fabric are removed, and the capillary effect is significantly improved, meeting the processing requirements of some varieties. However, for bleached fabrics and brightly colored light-colored floral and dyed fabrics, it is necessary to further improve whiteness, hence the need for bleaching.

The setting temperature for polyester generally does not change much. However, the sublimation fastness of the bright red dye is not good. After the process, the dye will remain in the machine box and cannot be made into a light color immediately. Only black can be made. It

The main properties of spandex fibers are: they usually have an elongation of over 500% to 700% and good elastic recovery performance. It retracts by 97% when stretched by 200% and by more than 99% when stretched by 50%

Several basic properties of textile fibers 1. The moisture absorption performance of fibersWhen textile fibers are exposed to the air, they constantly exchange water vapor with the air, that is, they continuously absorb water vapor from the air while also constantly releasing it into the air.

1.What is a fluorescent whitening agent?Fluorescent whitening agents themselves are almost colorless dyes that can absorb harmful ultraviolet rays from light, converting some into their own vibration energy and the other into visible blue light. This way, the clothes look whiter and more vibrant. In fact, it utilizes a visual effect.

1、Reasons for the appearance of dyeing defects. 1. Reason for grey fabric: Many potential defects in dyed fabric are caused by poor quality of grey fabric, such as weaving defects and yarn defects. Due to the mixing of different batches of yarn, weaving defects such as warp and warp stripes, weft and weft stripes are formed on the fabric.