hot air through non woven
1. Hot air through non woven Hot air through non woven is a kind of hot air bonded (hot rolling, hot air) non-woven fabric. Hot air through non woven is a kind of non-woven fabric. After the fibers are combed, the hot air on the drying equipment can be used to penetrate the fiber web for bonding.Hot air bonding refers to the bonding production method that uses hot air to penetrate the fiber web on the drying equipment, heat and melt it. Hot air through non woven adopts different heating methods, and the performance and style of the products are also different. Generally, hot air bonded products have the characteristics of fluffy, soft, good elasticity and strong warmth retention, but have low strength and are easy to deform. In hot air bonding production, before the fiber web enters the drying chamber, a certain proportion of low-melting point bonding fibers are mixed into the fiber web, or bi-component fibers are used, or a certain amount of bonding powder is applied using a powder spreading device. The melting point of the powder is lower than that of the fibers. Melts rapidly when heated, causing interfiber adhesion. The heating temperature of hot air bonding is generally lower than the melting point of the main fiber. Therefore, when selecting fibers, the matching of the thermal properties of the main fiber and the bonding fiber should be considered, and the difference between the melting point of the bonding fiber and the melting point of the main fiber should be as large as possible to reduce the thermal shrinkage of the main fiber and maintain the original properties of the fiber. Binder fibers have lower strength than normal fibers. Therefore, the amount of bonding fiber should not be too large, generally controlled at 15% to 50%. Due to its small thermal shrinkage, bicomponent fibers are very suitable for use alone or as binder fibers for the production of air-bonded nonwovens, forming a point-bonded structure with good results. The product produced by this method has high strength and soft touch.