Lightweight soft polyester DTY yarn Light Pink/Red/White/Purple/Yellow ZR0161-ZR0313 758

What are the main dyeing processes that affect the color of polyester DTY products (such as Light Pink/Red/White/Purple/Yellow)?

The main dyeing processes that affect the color of polyester DTY (stretched yarn) products include the following:

High temperature and high pressure dyeing: Polyester is a hydrophobic fiber, and high temperature and high pressure dyeing processes are commonly used. The dyeing temperature is generally around 130°C, and the dye enters the interior of the polyester fiber through diffusion at high temperature to ensure the uniformity and depth of the color.

Disperse dye dyeing: Disperse dye is the most commonly used dye for polyester. This type of dye has small molecules and can penetrate into the polyester fiber structure at high temperature, making the color adhere firmly and highly washable, suitable for bright and light color dyeing, such as pink, red, etc.

Dye pH adjustment: The dyeing effect of polyester is sensitive to the pH value of the dye solution, and it is usually dyed in a weakly acidic environment. By adjusting the pH value of the dye solution, the dye uptake and dyeing uniformity can be affected.

Pretreatment process: Polyester yarn needs to be cleaned and degreased before dyeing to remove surface oil and impurities, ensure that the dye can penetrate evenly, and avoid uneven dyeing or color difference problems.

Use of leveling agent: In order to avoid color spots or unevenness in the dyeing process of polyester, leveling agents are usually added. Leveling agents help the dye to be evenly distributed in the fiber and improve the consistency of dyeing.

Pre-spinning dyeing (solution dyeing): In the production process of polyester fiber, the dye is directly added to the spinning raw material for dyeing. This method is called solution dyeing. It has excellent color fastness and good dyeing uniformity, and is particularly suitable for mass production of polyester yarns of specific colors.

Finishing process: After dyeing, polyester DTY yarn may also need to undergo finishing processes such as antistatic and softener treatment to improve the feel and anti-pilling performance, while enhancing the color gloss after dyeing.

The selection and regulation of these processes directly affect the final color effect, color fastness and uniformity of polyester DTY yarn. Polyester yarns of different colors may require different process adjustments to achieve the best dyeing effect.