Polypropylene staple fibers have high spinning temperatures (above 300 ℃), and there are significant differences in spinning temperatures among different specifications of materials. Therefore, the selection and control of temperature for polypropylene short fibers is very important. If the spinning temperature is controlled too high, in addition to the possibility of yarn breakage, the main manifestation is that the strength of the finished product will significantly decrease, and the stretching will also be abnormal.

If the temperature is controlled too low, in addition to the possibility of hard end wires and melt cracks, it can also lead to poor tensile performance, or even inability to stretch, forcing a reduction in the stretching ratio, or causing excessive retraction of the stretching wire, resulting in excessive elongation of the finished product. Spinning temperature control mainly relies on testing the viscosity average molecular weight of oil-free fibers, in addition to empirical observation.

In general, the insulation zone has a significant impact on the degradation of polymers. Therefore, changing the temperature in this zone can quickly change the molecular weight of oil-free fibers. Controlling the spinning temperature is one of the key factors in producing polypropylene short fibers.

In the process of making polypropylene staple fiber, functional masterbatch such as anti-aging masterbatch and flame retardant masterbatch can be added as required to increase the performance of polypropylene staple fiber. Polypropylene staple fiber for felt is a polypropylene staple fiber specifically used for making felt, used for filter materials.

Hubei Botao Synthetic Fiber Co., Ltd. was founded in October 2000 and is located in Jingmen City, Hubei Province. It specializes in the production and sales of polypropylene, polyester, composite fibers, and polylactic acid short fibers. Its products are mainly used in industries such as non-woven fabrics, automotive interiors, geotextiles, carpets, and filters. The company has introduced multiple imported fiber production lines, with fixed assets exceeding 300 million yuan, annual production of 100000 tons of polypropylene short fibers, 20000 tons of polyester short fibers, and 10000 tons of composite fibers, with an annual output value exceeding 800 million yuan. Focusing on the field of synthetic fibers for more than 20 years, Bo Tao Synthetic Fiber has achieved excellent market performance and extensive honors with a mindset of continuous improvement and honest development.