The spinning temperature of polypropylene staple fiber is high (above 300℃), and the spinning temperature of various specifications of materials varies greatly. Therefore, the selection and control of polypropylene staple fiber temperature is very important. The spinning temperature control is too high, in addition to the possibility of broken hair, the main performance of the finished product strength will be significantly reduced, and the tensile will be abnormal.

If the control temperature is too low, in addition to the possibility of hard-headed wire, melt cracks, it will also make the tensile performance worse, and even can not be stretched, forced to reduce the tensile multiple, or the tensile wire retraction is too large resulting in too much elongation of the finished product. In addition to empirical observation, the spinning temperature is controlled mainly by testing the viscosity average molecular weight of oil-free silk.

Under normal circumstances, the insulation area has a great impact on the degradation of polymers, so changing the temperature in this area changes the molecular weight of oil-free silk faster, and controlling the spinning temperature is one of the keys to producing polypropylene staple fibers.

In the process of making polypropylene staple fiber, functional masterbatches can be added as needed, such as anti-aging masterbatches, flame retardant masterbatches, etc., to increase the performance of polypropylene staple fiber. Polypropylene staple fiber for felt is a polypropylene staple fiber specially used to make felt for filter materials.

Hubei Botao Synthetic Fiber Co., Ltd. was founded in October 2000, located in Jingmen City, Hubei Province, specializing in the production and sales of polypropylene, polyester, composite fiber, polylactic acid staple fiber, the products are mainly used in non-woven fabrics, automotive interior, geotextiles, carpets, filtration and other industries. The company has introduced a number of imported fiber production lines, with fixed assets of more than 300 million yuan, an annual output of 100,000 tons of polypropylene staple fiber, 20,000 tons of polyester staple fiber, 10,000 tons of composite fiber, and an annual output value of over 800 million yuan. Focusing on the field of synthetic fiber for more than 20 years, Botao synthetic fiber has obtained excellent market results and extensive honors with the mentality of excellence and integrity development.