Author：Baby & Adult Diaper Materials FROM：Diaper Materials Manufacturer TIME：2023-02-14
Spunlace nonwovens have excellent characteristics, good hygroscopicity and air permeability, soft hand feeling, high strength, good drapability, no chemical adhesives, and the appearance is closer to traditional textiles than other nonwovens. accounted for a large proportion of the total output. This paper briefly introduces the effect of fiber topography on the performance of spunlace non woven viscose fabric.
Under a fixed spunlace pressure, the breaking strength of spunlace non woven viscose fabric is related to the fiber length. Within a certain range, the breaking strength increases with the increase of fiber length. This is because as the length of the fiber increases, the number of parts that each fiber is impacted by the water flow increases, and the degree of entanglement of the fibers also increases. strength. However, if the fiber is too long, it will cause difficulties in carding, which is not conducive to web formation. Therefore, when using spunlace to produce non-woven fabrics, special attention should be paid to the reasonable selection of fiber length to achieve the best performance of the product.
The crimp of the fiber directly affects the ability of the needle teeth to hold the fiber in the process of opening, carding and web forming, and restricts the entanglement effect of the fiber in the spunlace process. The higher the degree of crimp, the fibers are more conducive to cohesion when forming a web, which increases the stability of the fiber web and improves the ability of the fiber to resist external force deformation; Puncture the bulkiness of nonwovens and reduce the strength of the product. Therefore, in order to ensure the smooth progress of production and product performance, the influence of curl degree on different aspects should be comprehensively considered and controlled in actual production.
Under the same conditions of fiber length, spunlace pressure, nonwoven surface density, etc., the smaller the linear density of the fiber, the tighter the fiber entanglement, and the higher the strength of the spunlace non woven viscose fabric. This is because for products with the same surface density, the coverage rate of fibers with low linear density is higher than that of fibers with high linear density, and its elastic modulus is also low. Knot degree, thereby improving the strength of spunlace products.
The formula of material mechanics shows that the bending deflection of the fiber is inversely proportional to the 4th power of the fiber diameter. If the fiber diameter is doubled, the spunlace force needs to be increased by 15 times to make the fiber achieve the same bending deflection. It can be seen that reducing the fiber diameter can greatly increase the spunlace efficiency and improve product performance, thereby saving energy and reducing production costs. Effect.
The bending deflection of the fiber is closely related to the cross-sectional shape coefficient of the fiber. As the fiber shape coefficient decreases, the bending deflection of the fiber increases, the spunlace efficiency increases, and the performance of the spunlace nonwoven fabric will be greatly improved. The cross-sectional shape coefficient of the fiber is: flat shape<circle<hollow circle<triangle. The spunlace efficiency is highest for flat fibers and lowest for triangular fibers.
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