Textile Materials: Fabrics (Seventeen): Itching of Fabrics
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The itching sensation generally refers to the pain caused by the hairiness on the surface of the fabric piercing the skin, as well as the light pricking, scraping, and friction, causing people to have a comprehensive feeling of “itching”, and often “itching” is the main feeling.
Factors affecting fabric itch
The irritation of fabrics depends on the prominent hairiness on the fabric and its mechanical properties; the structure of the fabric and yarn and its constraint on hairiness; the state of human skin and the nervous sensory system. The most critical one is the hairiness that protrudes from the surface of the fabric.
1. Fiber properties
Fiber properties and shape, such as diameter, hairiness length and bending stiffness, are the most important factors affecting fabric itch. As far as hairiness is concerned, if the length of the hairiness is too long, the overall fiber will be soft and it is less likely to itch. If the length of the hairiness is too short, the fiber will not yield enough to cause thorns. Generally, itching is easy to occur when the hairiness length is in the range of 1~5mm, especially when the aspect ratio is 50~200.
2. Number and shape of hairiness
The number of hairiness refers to the number of needle-end hairs per unit volume of the fabric, which directly indicates the probability of fibers that can cause itching.
3. Fabric and yarn structure
The influence of structure mainly refers to the tightness of the fabric and spinning yarn structure, which is related to the arrangement density, tightness and organization of the fabric; it is related to the twisting and finishing method of the spinning yarn.
How to remove itching sensation
The main cause of the itching sensation is the stiff and prominent hairiness on the surface of the fabric, so there are only three improvement methods: First, remove or reduce the hairiness, such as singeing or shearing; or conversely, increase the hairiness and make it inverted. Lying down, such as pulling, combing and pressing. Second, fiber softening, such as alkali treatment, ammonia treatment, sand washing and enzyme treatment, can soften, thin or fibrillate the fiber. It can also change the fiber accumulation structure, especially the crystallinity, or reduce the thickness of the fiber. and head-end effects. Third, the fibers become thinner and finer fibers are selected for fiber finishing or fiber refinement.
Textile Materials (17): Itching of Fabrics
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