Hot-rolled non-woven fabric is one of the hot-air bonding (hot-rolled, hot-air) non-woven fabrics . The hot-air non-woven fabric is a non-woven fabric that is formed by heat bonding through the hot air of a drying device after fiber finishing.
Hot-air bonding refers to the production method in which hot air penetrates the fiber web for thermal melting in the drying equipment to produce bonding. The heating method used is different, and the performance and style of the product are also different. Generally, hot-air bonded products have the characteristics of fluffy, soft, good elasticity, and strong thermal insulation, but they are low in strength and easy to deform. In the production of hot-air bonding, most bonding fiber webs are mixed with a certain proportion of low-melting bonding fibers, bi-component fibers are used, or a powder-spreading device adds an appropriate amount of bonding powder before the fiber web enters the drying chamber. The melting point of the powder is lower than the melting point of the fiber, and it melts immediately after heating to make the fibers bond. The heating temperature of hot air bonding is generally lower than the melting point of the main fiber.
Therefore, in the selection of fibers, considering the consistency of the thermal properties of the main fiber and the bonding fiber, try to make the difference between the melting point of the bonding fiber and the melting point of the main fiber as large as possible, and reduce the heat shrinkage rate of the main fiber as much as possible. , Maintain the performance of the main fiber. The strength of the bonding fiber is lower than that of the normal fiber, so the addition amount should not be too large, and it is generally controlled at 15%~50%. Due to the low thermal shrinkage rate of bicomponent fiber, it is suitable to be used alone or as a bonding fiber to produce hot-air bonded non-woven fabrics, forming a stable point-bonded structure. The product produced by this method has high strength and soft hand feeling.
The main raw material of hot air non-woven fabric is ES fiber, which is an ideal thermal bonding fiber, which is mainly used for thermal bonding processing of non-woven fabrics. When the carded fiber web is thermally bonded by hot rolling or hot air penetration, the low-melting point components form a fusion bond at the fiber intersections. After cooling, the fibers at the non-intersecting points remain in their original state, which is a point-like bond. It is not a form of zone bonding, so the product has the characteristics of fluffy, soft, high-strength, oil absorption and blood absorption. In recent years, the rapid development of the application of thermal bonding methods depends on these new synthetic fiber materials.