Main causes of fading
Fading mainly comes from the following factors:
Physical wear: Frequent use of the table causes friction that gradually causes the pigment or dye to fall off;
Chemical effects of washing: alkaline detergents, high-temperature washing, bleach residues, etc. damage the fiber and pigment structure;
Light fading: UV radiation makes the molecular structure of the dye unstable and degrades;
Heat effects: High-temperature ironing or drying may also cause dye decomposition;
Wet friction: When a wet cloth comes into contact with other items, it is easy to transfer the dye to other surfaces.
Understanding these factors will help companies take targeted measures in product design and production to improve anti-fading performance.
The impact of dyeing technology on anti-fading performance
The dyeing method directly determines the color fastness of the fabric. Common dyeing methods include:
Reactive dye dyeing: chemically reacts with fibers to form covalent bonds, with high color fastness, especially suitable for cotton tablecloths;
Disperse dye dyeing: mainly used for polyester materials, through the dye penetrating into the fiber at high temperature, with good light resistance and washing fastness;
Reactive dye cold stacking process: suitable for mass customization, relatively low cost, and high requirements for color fixation control;
Pigment printing: using adhesives to attach pigments to the cloth surface, with slightly inferior color fixation, but suitable for complex pattern printing.
Choosing a suitable dyeing process is the first step to achieve anti-fading. High-quality dyes and reasonable processes are the basis for ensuring the color stability of fabrics.
Anti-fading treatment process means
After dyeing, in order to further improve the anti-fading ability of table cloths, enterprises need to adopt a number of post-finishing processes:
1. Color fixation treatment
Use special color fixatives (such as cationic or anionic color fixatives) to bond with dye molecules, enhance the binding force between dyes and fibers, and effectively improve washing, dry rubbing and wet rubbing fastness.
2. Anti-ultraviolet finishing
Use ultraviolet absorbers (such as benzophenone compounds) to treat the surface of the tablecloth to form a UV shielding layer to prevent the decomposition of dyes caused by sunlight and improve light fastness.
3. Coating treatment
Applying acrylic emulsion coating or silicone treatment to the surface of the tablecloth not only enhances the waterproof and anti-fouling effect, but also isolates the direct contact between air and dyes, reducing the risk of oxidation and fading.
4. Nano finishing technology
In recent years, materials such as nano zinc oxide and nano TiO₂ have been widely used in fabric finishing, which not only enhances the antibacterial and anti-ultraviolet effects, but also improves the thermal stability and light stability of dyes.
5. Acid-base neutralization treatment
If alkaline substances remain during washing or dyeing, it is easy to cause uneven color and fading. Neutralization treatment can effectively maintain color uniformity.