Explanation of the technical skills of the needle punching depth in the main process parameters of the needle punched non-woven

OF: Time: 2019-12-12 08:17:44 Click: 2312 after the lancet needle tip depth is the downward (or upward) from the holder by the screen plate surface, i.e., the lancet projecting web through the web The length of the outside. When the needle size is fixed, the needle penetration depth is large, the puncturing fibers are more, the knots between the fibers are sufficient, and the strength of the product is improved. However, the depth of acupuncture needs to be appropriate. Acupuncture that is too deep will increase fiber breakage, increase the acupuncture force and even break the needle. Too shallow acupuncture can also cause bad knots and affect product strength. When determining the depth of acupuncture, the following principles should be grasped: 1) When processing a web composed of coarse and long fibers, the depth of acupuncture can be deeper, and vice versa. (2) When processing fibers with higher single fiber strength, the depth of needle penetration can be deeper, and vice versa. (3) When processing a web with a larger square meter weight, the depth of needle penetration can be deeper, and vice versa. (4) When processing looser webs, the depth of needle penetration can be deeper, and vice versa. (5) For products that require rigidity, pierce deeper, and vice versa. (6) For products with higher needling density, pierce deeper at the beginning and lighter at the end. (7) Pre-acupuncture has a greater depth than main acupuncture. (8) If there are several consecutive acupuncture machines, the depth of the first few acupuncture passes is larger than the latter. The depth of acupuncture is generally adjusted within 3-17mm. Increase the depth of needle penetration within a certain range, and more fibers can participate in the knot, because the number of barbs penetrating the fiber web increases. This shows that the depth of needle penetration is also related to the arrangement density of barbs. Needles of different models and specifications, even with the same penetration depth, the number of barbs penetrating the web is different. Related tags: Previous: Detailed explanation of the reasonable weighing range of non-woven bags of different sizes, and can not be used too much beyond the load