Polyester Fabric Textile Whitening Chemical Reagent Pure White Dispersion Polyester Whitening Agent

Product Description

• 【Product Features】
  • Strong fluorescence, high whiteness, and good washing fastness

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• 【Product Application】
  • Mainly applicable to the whitening and brightening of polyester fibers and their blended fabrics, especially suitable for low-temperature (95 - 100°C) whitening of polyester fiber knitting.

• 【Usage Method】
  1. Low-temperature adsorption dip dyeing method:
     • Dosage: 0.3 - 0.7% (o.w.f)
     • Bath ratio: 1:10 - 20
     • Dyeing temperature: 95 - 100°C
     • Dyeing time: 30 - 40 minutes
     • pH value: 4.5 - 5.5 (adjusted with acetic acid)
     • Process flow: Add additives, acetic acid (to adjust pH: 4.5 - 5.5), and whitening agent into the dye bath according to the formula, heat up to 95 - 100°C at a rate of 2 - 3°C per minute, keep the temperature constant for 30 - 40 minutes, cool down, wash with water, dehydrate, and dry at 80 - 100°C. The whiteness can meet the user's requirements. If the user has a setting machine, after washing with water and dehydration, pre-dry at 80 - 100°C and bake at 170 - 175°C for 30 - 40 seconds, and the whiteness effect will be better.
  2. Pad dyeing method:
     • Dosage: 1.5 - 4 grams per liter
     • Process flow: Double dip and double pad (liquor pick-up rate 70%) -> pre-drying at 100°C -> baking and setting at 175 - 180°C for 30 seconds.
  3. High-temperature and high-pressure dip dyeing method:
     • Dosage: 0.2 - 0.5% (o.w.f)
     • Bath ratio: 1:10 - 20
     • Dyeing temperature: 120 - 130°C
     • Dyeing time: 30 - 60 minutes
     • pH value: 4.5 - 5.5 (adjusted with acetic acid)

• 【Precautions】
  • If the suspension is found to be precipitated and layered, just shake it evenly before use, which will not affect the use effect. Pay attention to using within the yellowing point of this product, that is, pad dyeing ≤ 5 grams per liter, dip dyeing ≤ 0.8% (o.w.f). If the dosage exceeds the yellowing point, it is easy to turn yellow.

• 【Storage and Packaging】
  1. Store in a cool, dry, and ventilated place, protected from sunlight and rain, with a shelf life of 6 months.
  2. 50kg plastic drum lined with polyethylene plastic bag