Wet Rubbing Fastness Improving Agent

Rubbing fastness is one of the most important indexes in the color fastness of textiles, that is, the degree of fading of dyed fabric after friction, which can be divided into dry and wet rubbing. Rubbing fastness to the color of white cloth as the evaluation principle, a total of 5 grades (1-5), the larger the value, indicating the better the rubbing fastness.

The factors affecting the fastness to wet rubbing in textile products are: the types of fabrics, fabric structure, textile pretreatment, such as desizing, scouring, bleaching, mercerizing, etc., the choice of textile dyes and the process, temperature, time control strict or not, as well as the selection and use of textiles auxiliaries, and post-treatment, etc.

Reactive dyes with bright color, complete chromatogram and low price are important dyes for cotton, but the wet rubbing fastness relatively low in dyeing medium and dark colors. At present, improving the wet rubbing fastness of reactive dyes mainly by selecting suitable dyes to make the color, strengthening the control of pretreatment and dyeing process, washing and soaping to remove the floating color, controlling the ph value of the dye cloth, using soft water, adding the sting dispersing agent, etc. However, the above methods are not effective. Therefore, it is necessary to deal with the fabric with special high efficiency color fastness improving agent so as to solve the problem of wet rubbing fastness fundamentally.

Several types of wet rubbing fastness improver:
Adsorption precipitation type
1. Cross-linked type
2. Film cover isolation type
3. Fixing color type 

4. Fixing color type

Fixing color type wet rubbing fastness improving agent is to improve the fixation rate of reactive dyes to reduce the color of floating to improve wet rubbing fastness, such as fixing agent. Applicable to the active, direct, vulcanization, acid, disperse dyes and printed fabrics, especially the fuzz clothes, significantly improve the fiber wet and dry rubbing fastness, excluding APEO and silicon spots, not affecting the fabric feel, high temperature resistance.

HT FINE CHEMICAL is specialized in production and exporting of eco friendly wet rubbing fastness improving agent, fastness above grade 3.

Wet Rubbing Fastness Improving Agent HT-818

[Brief information]

-- Original wet rubbing fastness improving agent is poor deep dyeing for direct, reactive，indigo blue and sulfur dyestuffs, especially for dark black, bright red and turquoise blue whose wet rubbing fastness is below Grade 1, while fabric wet rubbing fastness exported to Europe and US must be above Grade 3. Therefore, our company specially developed environment-friendly wet rubbing fastness improving agent 818 that comply with the new environment requirement, such as free of DMF solvent, few odor.

[Main composition]

-- Special water-based polyurethane.

[General properties]

-- Appearance: light yellow to yellow liquid（darker as time going）

-- Ionicity: weakly cationic

-- pH: 3.5+0.5（50g/L）

-- Solubility: easily soluble in normal water in any proportion at room temperature

[Properties and fields of application]

-- Free of formaldehyde and APEO that belongs to environmental products and complies with EU OEKO-TEX Standard 100 requirements.

-- Use for fixing after cellulose fiber dyeing. Excellent wet rubbing fastness improving performance that can meet above Grade 3 by improving 1- 1.5 grades.

--No influence on shade and light fastness.

--It is obviously to improve the stability, such as resist to salt and hard water.

[Application]

Based on different kind and concentration of dyes, different kind and pattern of treated fabric, Dosage as below:

-- Dipping (washing only)

HT-818:   2-4% (O.W.F) (Adjustment base on color)

Bath ratio:   1: 10 – 20

Dyed fabrics (pH ≦ 7) → Dip at 40℃ × 20 – 30 min →Dry

-- Padding:

HT-818:   30 – 50 g/L

Dyed fabrics (pH <= 7) → One dip & pad  with water retention 80 – 85% → Dry

[Notise:]

-- Prepared solution should be used immediately.Please test before using.The above process is for reference only.

--Only use alone, can not use for one bath with silicone oil, fixing agent and anionic agent.

--The working liquid can achieve the best performance at 25-35℃.

-- Please clean up the alkali (pH less than 7), salt and soaping agent of the fabric before using wet rubbing fastness improving agent 818.

--Please clear away foaming or groove and change the working liquid because it will have a lot of foam when it use for a long time.

--Make sure pH at 4.5-5 as possible.

--The water use for liquid water should be less than 100ppm of the tap water.

[ Packing and storage ]

-- Packing: 125 kg/polyethylene drum

-- Storage: Keep it cool and dry, 6 months in sealed container at room temperature.