The process of polypropylene short fibers may seem simple and convenient, but is it really like this? A slight mistake in the operation process can have a significant impact on the production of finished products. For example, the problem of excessive elongation of polypropylene short fibers.

Excessive elongation of polypropylene short fibers can cause many hazards. In blending, it can also affect the yarn strength.

In spinning, it has been found that the strength of the blended yarn is poor, such as the quality index of pure polypropylene fiber 2808, the quality index of polypropylene 50% cotton blended yarn 1950, and the quality index of polypropylene 50% cotton blended yarn 2193215. The quality index of pure cotton 2336. From the above data, it can be seen that pure polypropylene yarn has a higher strength, much higher than cotton, but when mixed with cotton, it is not as high as pure cotton. Although this situation may be related to the non-uniformity in the mixing of polypropylene short fibers with cotton, it is also related to the difficulty in controlling the elongation of polypropylene short fibers. Therefore, the seemingly simple process is also a test for manufacturers.

The appearance of polypropylene short fibers looks like a lump of cotton, soft and elastic to a certain extent. The elongation performance of polypropylene short fibers is relatively high, which is easy to control poorly in production, with elongation exceeding 60%. This is not only due to the structural factors of its polypropylene macromolecules, but also due to insufficient stretching during the production process.

Due to the large unevenness of the silk, increasing the stretching ratio can easily cause the roller to break, or sometimes retract after stretching enough. During production, it is often found that the retraction of the wire between the second and third stretching machines during parking causes the three and five rollers to reverse, indicating that after orientation, the internal stress of the fibers is high and there is retraction. These can be improved by intense heat setting or appropriate heat treatment.

Hubei Botao Synthetic Fiber Co., Ltd. was established in October 2000, specializing in the production and sales of polypropylene, polyester, composite fibers, and polylactic acid short fibers. The products are mainly used in industries such as non-woven fabrics, automotive interiors, geotextiles, carpets, and filtration. The company is located in Jingmen City, Hubei Province, and currently has six branches, covering a total area of 300000 square meters. The company is equipped with an imported fiber production line, with fixed assets exceeding 100 million yuan. It produces 50000 tons of polypropylene short fibers, 20000 tons of polyester short fibers, and 10000 tons of composite fibers annually, with an annual output value exceeding 500 million yuan.

The company adheres to technological innovation as the foundation, introduces new technological talents, cooperates with universities and colleges to develop and create a high-end Botao brand. The polypropylene short fibers used for automotive interiors and high-speed rail geotextiles that closely follow market demand have filled the market gap. The company currently has over 280 employees, including 8 engineers and more than 30 other technical personnel. With strong technical strength, it has a strict quality inspection system and independent research and development, production, and marketing capabilities. It is a leading enterprise in the Chinese polypropylene industry and has participated in drafting and formulating the industry standard "Polypropylene Short Fiber". It is the vice president unit of the Polypropylene Branch of the China Chemical Fiber Association.