Under the same processing conditions, why does the production of needle-punched non-woven fabrics have uneven hardness and softness?
Needle-punched non-woven fabrics are a kind of non-woven fabrics. They are made of polyester and polypropylene raw materials, and are processed by multiple needle punches and appropriate hot rolling. Under the same processing conditions, why is the production of needle-punched non-woven fabrics uneven in hardness and softness? Let's take a look together!
Under the same processing conditions, the reasons why the production of needle-punched non-woven fabrics will be uneven in hardness and softness are as follows:
1. Evenly, the part with the higher low melting point content is harder and the part with the lower content is softer.
2. Incomplete melting of low-melting fibers results in softer needle-punched non-woven fabrics.
3. The high shrinkage rate of the fiber will also cause the problem of uneven hardness and softness of the needle-punched non-woven fabric.
The above is the reason why the production of needle-punched non-woven fabrics will be uneven in hardness and softness under the same processing conditions, I hope to help you.
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