The main characteristics of polypropylene staple fibers:

It features fast winding speed, no need for solvents or precipitants, simple equipment and short process time. This method can be used to prepare fiber-forming polymers with a melting point lower than the decomposition temperature and capable of melting to form thermally stable melts. Such as polyester, polypropylene, nylon, etc.

Polypropylene staple fiber is a univariate system, which only involves heat transfer between the polymer melt filament and the cooling medium. The composition of the spinning system remains unchanged. The dry and wet spinning systems are respectively a binary system (polymer + solvent) and a ternary system (polymer + solvent + precipitant).

During the spinning process, the polymer melt precipitates from the fine pores of the spinneret at a constant flow rate. Between the spinneret and the winding device, the fine wire is stretched to the required fineness and fully cooled to solidify. The diameter of a spinneret is generally 0.1 to 0.4mm, while the diameter of the wound wire is only 20 to 30μm. After the holes of the spinneret are melted out, the diameter of the wire needs to be reduced by ten times, and the wire needs to be stretched a hundred times. Therefore, the winding speed is a hundred times higher than the extrusion speed.

Due to the strong tensile resistance of polymer melt filaments after curing, the speed of Polypropylene staple fibers is very fast. In industry, the winding speed of melt spinning is several hundred to several thousand meters per minute. The cooling and solidification of steel wire is usually carried out in the air under the spinneret. To enhance the cooling effect, the airflow of temperature and humidity is blown perpendicularly or parallelly towards the wire after the spinneret. Stretching can alter the internal structure of the original fibers, enhance their breaking strength and wear resistance, and reduce the elongation of the product. Heat setting can regulate the intermolecular forces of polymers during the spinning process, enhancing the physical and mechanical properties of fibers such as stability and dyeing performance. Curling improves the working performance of synthetic fibers (both wool and cotton fibers are curled), overcoming the disadvantages of rough and flat surfaces. False twist is an improvement on fabric style, allowing it to ferment and increase elasticity.

Suzhou Xincheng Textile Co., Ltd. is located in the beautiful and fertile Suzhou City, close to developed large and medium-sized cities such as Shanghai, Wuxi, Nanjing, and Hangzhou. It has a unique economic environment and geographical location, and very convenient water and land transportation. The company currently has polyester staple fiber production lines and Polypropylene staple fiber production lines, with more than 150 employees. The annual output of polyester staple fiber is 30,000 tons. It mainly produces: small and medium-sized chemical and viscose spinning; the annual output of Polypropylene staple fiber is 16,000 tons. At the same time, we produce masterbatches and can provide customized services according to customer needs.

The company can also tailor-make various personalized short fibers and masterbatch according to the different needs of customers. The company has strong technical force, 19 years of skilled craftsmanship and advanced quality control management system. It has a certain reputation in the market and its products are best-selling Many countries and regions around the world.