The Mechanism of UV-Resistant Finishing.
From an optical perspective, when light is projected onto an object, a portion of it reflects on the surface, some of it is absorbed by the object, and the rest passes through the object. In general, the transmittance rate + reflectance rate + absorbance rate = 100%.
The principle of UV-resistant processing is to use UV blockers to treat fibers or fabrics.
When light radiation reaches the fabric, a small portion passes through the gaps in the fabric, and most of it is reflected or selectively absorbed by the UV blockers and converted into low energy, which is then released, thereby blocking the UV radiation.
Production of UV-Resistant Textiles.
The production of UV-resistant textiles belongs to the category of post-treatment of textiles, mainly involving the use of UV-resistant finishing agents, the preparation of finishing solutions, and the selection of finishing processes.
The finishing process of UV-resistant fabrics depends on the type of fabric and the final use. For example, summer clothing requires high softness and comfort, and it is better to use absorption or impregnation methods for UV-resistant finishing.
If used as decorative, household or industrial textiles, emphasis is placed on their functional requirements, and surface coating methods can be used.
For UV-resistant finishing of blended fabrics, impregnation and rolling-baking methods are still preferred from a technical point of view because this process has less impact on fiber properties, fabric style, moisture (water) absorption, and strength, and can also be combined with other functional finishes, such as antibacterial, deodorant, hydrophilic, and wrinkle-resistant finishes.