The difference between dry rubbing and wet rubbing fastness of textile fabrics

In life, we will inevitably encounter this kind of situation. After the clothes are washed several times, the surface of the clothes will be worn or broken. When carrying out high-intensity work, the clothes will be rubbed and the color fastness will be damaged. In fact, these are all caused by poor color fastness and poor tensile force of the fabric. At this time, the wet rubbing fastness of the fabric is particularly important.

What is the difference between dry rubbing and wet rubbing fastness?

01 dry friction

Dry friction refers to the simulation of the phenomenon that textile fabrics resist rubbing and fading under the normal temperature of the standard atmospheric temperature of 20 degrees Celsius and humidity of 65%.

02 wet friction

Wet friction refers to the simulation of the friction and fading of textile fabrics with a frictional water content of 100% under the same standard atmospheric temperature of 20 degrees Celsius and normal temperature of 65% humidity.

In general, the color fastness to rubbing of fabrics is higher than that of dry rubbing than wet rubbing. In special cases, wet rubbing is higher than dry rubbing, which is related to the fabric structure and surface morphology.

Factors Affecting Wet Rubbing Fastness of Dyed Fabrics

01Factor of fabric

Factors such as the type of fabric, the structure of the fabric, and the surface finish of the fabric will all affect the wet rubbing fastness.

02 Pre-processing factors

The pre-treatment of fabrics such as desizing, scouring, bleaching, mercerizing, heat setting, etc. must be uniform and transparent to ensure the absorbability of the fiber and the reactivity with the dye, so that the dye can be fully dyed, penetrate into the fiber and fix it , Try to avoid ring dyeing and surface coloring.

03 Dyeing Process Factors

The temperature and time of dyeing need to be strictly controlled to ensure that the dye is fully dyed and penetrated and fixed to avoid excessive unfixed dye on the surface of the fiber. The correct selection and rational use of textile auxiliaries are very important

04 Processing factors after dyeing

After the fabric is colored, it should be fully washed and soaped to ensure that the water quality, pH value and temperature are in an ideal range

05 dye factor

The quality of the dye is the main factor of the wet rubbing fastness. Generally speaking, the wet rubbing fastness of direct dyes, sulfur black, reactive deep navy blue, and reactive scarlet is relatively poor, while the wet rubbing fastness of disperse dyes, vat dyes, and cationic dyes better.

06 Factors of water quality

The hardness of the coloring water should be less than 100ppm, otherwise the calcium and magnesium ions in the water will combine with the anionic groups in the dye solution to form insoluble calcium carbonate, magnesium carbonate, magnesium hydroxide, etc., which will be combined with the dye. Will greatly reduce the wet rubbing fastness of the fabric

Wet and dry rubbing fastness improver JV-518D

1. Wet and dry rubbing fastness improving agent JV-518D is a polymer compound, which is specially used for the color fixing treatment of cotton fibers, and can improve the dry and wet rubbing fastness by 1-2 grades

2. Wet and dry rubbing fastness improver JV-518D can be used by spraying or rolling

3. Wet and dry rubbing fastness improver JV-518D can be used in the same bath with most silicone oils and softeners