The formation of polypropylene staple fiber cooling is generally as follows:

The slow cooling of polypropylene staple fibers is beneficial to the improvement of crystallinity and the decrease of orientation, and the rapid cooling is favorable for the improvement of orientation and the decrease of crystallinity. However, the cooling is fast and the molecular orientation greatly accelerates the crystallization. This factor is often the main factor under the existing process conditions. Therefore, cooling too fast will result in a large degree of orientation and crystallinity. The crystallinity is too large, making the silk brittle, which is not conducive to stretching. For example, when the side is blown, the temperature of the silk chamber and the orientation and crystallization of the wound wire will change. It can be seen that the cooling is too fast, resulting in a large degree of crystallinity and orientation.

If the polypropylene staple fiber is cooled too slowly, it will also increase the crystallinity, which is not conducive to the stretching of the polypropylene staple fiber. At the same time, the temperature of the silk chamber is too high, and the cooling and the breakage are caused by the cooling being too slow. Generally, the control is lower, the temperature of the side blower chamber is 35-40 °C. After 45 °C, the production is difficult to control. The temperature of the ring blower chamber can be between 30-40 °C, and the supply air temperature is 25 °C. It is only possible to ensure that the stretching of the polypropylene staple fibers does not change.

Hai'an County Qinfeng Chemical Fiber Co., Ltd. relies on the professional power of single stream, the front-end quality inspection system and perfect quality inspection system ranks among the high-quality enterprise queues in the industry, specializing in the production of short pp, polypropylene staple fiber, polyester staple fiber and Functional polypropylene staple fiber, etc.

For more product information, please contact: Mr. Qian 13962787918, 13813743991 Website: http://www.glory-fiber.com/