How to Improve Wet and Dry Rub Fastness?

Introduction: Textile manufacturing is a major global industry, providing a vast array of materials for clothing, interior design, and a variety of other end uses. Dyeing is an essential step in textile production, and poor fastness is one of the most significant challenges in dyeing. Fastness refers to the resistance of a textile's color to various stresses during processing and use. Fastness grades are assessed based on discoloration of the test specimen and staining of undyed adjacent fabric.

Causes of Poor Wet Rub Fastness

Poor wet rubbing fastness of dark dyes has long been a technical challenge for dyeing and finishing professionals. The relatively poor wet rubbing fastness of dyes is due to several inherent characteristics of dyes, such as their water solubility, which readily hydrolyzes under alkaline conditions, resulting in a loss of fiber reactivity; and the susceptibility of ester or tannin bonds formed by reactions with fiber molecules to hydrolysis. Furthermore, reactive dyes, direct dyes, and other water-soluble dyes have a certain affinity for water molecules. According to molecular diffusion theory, molecules diffuse faster in gases than in liquids, and faster in liquids than in solids. Since water molecules, acting as a medium for dye molecules to transfer between contacting fabric surfaces, are liquids, they increase the diffusion rate of dye molecules. Consequently, the wet rubbing fastness of the same dye tested is significantly lower than the dry rubbing fastness. Therefore, in production practice, we analyze the causes of poor wet rubbing fastness, strengthen control and measures within each process, and address inherent dye defects to improve the product's rubbing fastness.

Factors Affecting Fastness

Dye Structure and Properties

Fabric Properties

Dyeing Process and Post-Dyeing Soaping Effects

Post-Dyeing Fixation Effects

The Effect of Fabric Finishing

The Effect of Dyed Fabric Finishing, etc.

Solution

So, the question is, what can be done about poor wet and dry rubbing fastness? What can be done?

Wet Rubbing Fastness Improver Sylic F3730 can solve the problem!

Technical Specifications

Appearance Light yellow to yellow viscous liquid

Solid content (%) 28.0-30.0

pH (1% aqueous solution) 4.0-6.0

Ionic cation / nonionic

Solubility soluble in water

Performance and characteristics

1. The dyed fabric of cellulose fiber can be treated to improve the wet rubbing fastness of 1-2 grades.

2. The hand feels soft and the color becomes small, which does not affect the vividness of the dye.

3. Does not affect the original feel of the dye, if it is treated with the fixing agent, silicone oil and film, it is necessary to confirm the compatibility stability in advance.

Scope of application

It is suitable for fixing treatment of cellulose fiber activity, direct, vulcanization and other dyes to improve wet rubbing fastness.

Instructions

1. Impregnation method: dosage: 2-4% (o.w.f)

Temperature: 40-50 ° C

Time: 20-30min

2. Padding method: dosage: 20-40g/L

Drying: 110 ° C

Stereotype: 170 ° C

If you want to get more details about this product, please contact us :info@sylicglobal.com