The influence of fiber properties on the properties of non-woven fabrics

1. Fiber length: Non-woven fabric has long fiber length, high strength and good uniformity, but too long fiber is not conducive to carding and tends to produce fiber knots. Air-laid webs generally use a fiber length of about 10mm, and mechanical carded webs generally use a fiber length of less than 65mm.


2. Fiber linear density: The smaller the fiber linear density, the higher the strength and uniformity of the non-woven fabric. When the fiber linear density is too large, the elasticity of the fiber will be better. Some non-woven fabric products require a certain degree of wear resistance and resilience of the product, which requires that the fiber linear density should not be too small.


3. Fiber crimping degree: When the fiber coiling degree is small, the cohesion strength between the fibers will be relatively small, which will make it more difficult to form a web, the uniformity of the cloth surface will be relatively poor, and the strength is low. The woven fabric feels poorer and has poorer elasticity. When the crimp of the fiber is relatively large, the uniformity, strength, feel and elasticity of the fiber product will be significantly improved.


4. The cross-sectional shape of the fiber: the cross-section of the heterogeneous fiber is usually larger than the cross-section of the round fiber, the contact surface will be larger, and the strength of the manufactured non-woven fabric will usually be higher.


5. The friction coefficient of the fiber surface: When the friction coefficient of the fiber surface is large, the tangential resistance between the fibers is large, and the strength of the non-woven fabric is high, but this also causes the increase of the resistance during puncture. When spinning, an excessive friction coefficient can easily cause needle breakage.


6. The strength of the fiber: Generally speaking, the strength of the fiber is greater, and the strength of the non-woven fabric is also greater.