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What are the factors that affect the needling force in the needle-punching nonwoven process?

  • Author:Junqian Nonwoven
  • Source:Junqian Nonwoven
  • Release on :2019-05-21
The needle-punching force is the resistance that the needle is subjected to when the needle is pierced into the web during the needle punching process. It is a kind of dynamic when the needle is held in contact with the fiber remaining in the fiber web. The power of change. Its changing process can indirectly reflect the transfer effect and damage degree of the thorn on the fiber during the acupuncture(China Needle Punch Non Woven Fabric Vendor) process. Through the test of the magnetic force of the town, the rationality of the process parameters such as the frequency of acupuncture(Diy Felt Fabric Supplier), the depth of needling and the density of needling can be further studied. The dynamic curve of the needle penetration force of the needle can be measured by installing a load cell on the needling machine. When the needle starts to penetrate into the web, the web is not tight and the needle penetration increases slowly. When the lancet is gradually deepened, the number of hooks entering the web is gradually increased, and the frictional resistance is increased when the hook is held by the fiber puncture web, and the structure of the web is gradually tightened, and the needle penetration is sharply increased to reach the maximum value. When the needle and the hook spur gradually penetrate the bottom of the web, the resistance of the web to the needle is reduced, and the needle force gradually decreases in the form of fluctuations.

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The factors that affect the needle penetration are:

(1) Fiber length, linear density, and friction factor. When processing long and thin fibers, the needle penetration force is increased: when the fiber friction factor(PET Non Woven Felt Manufacturer) is large, the needle penetration force is also relatively large.

(2) When the density of the web is relatively large, the needle penetration force is increased.

(3) When the fiber web is quantitatively large or there is a base fabric in the web, the needle punching force is increased.

(4) The needle penetration force generally increases as the frequency of the needle stick increases.

(5) The needle penetration force increases as the depth of the needle is increased.

(6) The needle penetration force increases as the density of the needle punch increases.