PP FDY yarn can produce wool, how to deal with it?

In the case of high spinning speed and cooling rate, due to the stress concentration, the skin layer is subject to greater tension, and the skin layer of PP FDY yarns is prone to cracks and lead to wool. Therefore, choosing excellent cooling conditions to keep the radial structure uniform It seems more important.

The method is to establish an effective slow cooling zone and use a honeycomb side blowing device, which can generate advection wind and achieve good cooling of the thin stream of the melt. During the stretching process, as the processing speed (ie, the speed of the second heat roller) is increased, the output is proportionally increased, the production cost is reduced, and the uniformity of dyeing is improved. However, when the processing speed is too high, the product breakage and wool will increase accordingly, so it is necessary to weigh and determine the appropriate processing speed.

Ningbo Dazhong Chemical Fiber Industry Co., Ltd. has an annual output of 68-1800D of various colored polypropylene filaments, polypropylene POY filaments, polypropylene ordinary strong filaments, PP FDY yarns, 15,000 tons, 1.5D-13D polyester staple fibers of various specifications, 25,000 tons, welcome new and old friends to visit Patronize!