What is the reason for the different thickness of the non-woven fabric?

What is the reason for the different thickness of the non-woven fabric? Needle-punched non-woven fabric is one of dry non-woven fabrics. It is to loosen, comb and spread the short fiber into a fiber net, and then reinforce the fiber net into a cloth through a needle. The needle has a hook and the fiber net is repeatedly punctured, the hook belt fiber is reinforced to form a needle-punched non-woven fabric. The non-woven fabric is not divided into warp and weft, the fabric is messy, and the performance of the warp and weft direction is not much different. Typical products: synthetic leather base cloth, acupuncture geotextile, etc. What is the reason for the different thickness of the non-woven fabric? First of all, it is necessary to confirm which part of the acupuncture production process is caused by the thickness difference! 1. Is the cotton net output by the carding machine uniform and whether there is thick cotton? If so, check whether the distance between carding is loose, and then check whether the feeding part of the carding machine has beating or intermittent cotton, or if there is a cotton knot entering the carding machine, you need to continue to look for the reason in the direction of the cotton box. 2. Whether the speed of the net-laying machine is stable and whether the speed compensation is adjusted. 3, needle machine needle wear is consistent, is there a new needle on the same needle is not well prepared, a plate is a new needle a plate old needle and placed on the machine line. 4, the ironing machine has not been adjusted.