How to improve the wear resistance of polypropylene high strength filament?

Improving the wear resistance of polypropylene high strength filament can be started from the following aspects:

Raw material selection and modification:

Select high-quality raw materials: The use of propylene raw materials with high purity and uniform molecular weight distribution for polymerization can fundamentally ensure the basic properties of polypropylene high-strength yarn, including wear resistance. Because high-quality raw materials can make the molecular structure of the fiber more regular, fewer internal defects, so that it is less prone to wear when subjected to friction.

Adding wear-resistant additives: In the production process of polypropylene fiber, some wear-resistant additives can be added, such as nano-scale silicon dioxide, alumina and other inorganic particles. These particles can be evenly dispersed in the polypropylene matrix, increasing the hardness and wear resistance of the fiber. For example, the addition of nano-silica can improve the surface hardness of polypropylene high-strength silk, so that it is not easy to be scratched or worn when it is in contact with other objects.

Blending modification: polypropylene is blended with other fibers or polymers with good wear resistance, such as polyamide (nylon) and ultra-high molecular weight polyethylene. These materials have high wear resistance, which can make up for the lack of wear resistance of polypropylene fiber. Through blending modification, not only can improve the wear resistance of high strength polypropylene fiber, but also can integrate the advantages of other materials to improve the overall performance of the fiber.

Production process optimization:

Optimize the spinning process:

Adjusting the spinning temperature: Choosing the right spinning temperature is very important to improve the wear resistance of polypropylene high strength filament. Too high or too low temperature will affect the structure and properties of the fiber. If the temperature is too high, it will lead to excessive relaxation of the molecular chain of the fiber, reducing the strength and wear resistance of the fiber; If the temperature is too low, the crystallinity of the fiber will be uneven, and the performance of the fiber will also be affected. Therefore, it is necessary to adjust the spinning temperature according to the specific raw materials and equipment conditions to make it in the best range.

Control the spinning speed: Properly increasing the spinning speed can increase the orientation of the fiber, so that the molecular chain of the fiber is more orderly in the axial direction, thus improving the strength and wear resistance of the fiber. However, high spinning speed can also lead to excessive internal stress of the fiber, affecting the quality of the fiber. Therefore, it is necessary to properly increase the spinning speed under the premise of ensuring the quality of the fiber.

Strengthening tensile treatment: sufficient tensile treatment of polypropylene high strength filament can improve the crystallinity and orientation of the fiber, so that the structure of the fiber is more compact, thus improving the wear resistance of the fiber. The stretching ratio and the stretching speed need to be adjusted according to the performance requirements of the fiber and the equipment situation, in general, the larger the stretching ratio, the better the wear resistance of the fiber, but the stretching ratio is too large will also lead to the fracture of the fiber.

Improved heat treatment process: After the production of polypropylene high strength filament  is completed, proper heat treatment can eliminate the internal stress of the fiber, improve the crystallinity and dimensional stability of the fiber, and further improve the wear resistance of the fiber. The temperature and time of heat treatment need to be adjusted according to the performance requirements of the fiber and the equipment situation, in general, the higher the heat treatment temperature and the longer the time, the better the performance improvement of the fiber, but too high temperature and too long time will also lead to the performance of the fiber.

Shanghai Jinci Industrial Co., Ltd, founded in March 2006, is a large entity company specializing in the production and sales of polypropylene fiber (PP yarn). The company's products include polypropylene general filament, PP high-strength yarn, polypropylene light body filament, polypropylene twist filament, polypropylene hollow filament, polypropylene fluorescent filament, polypropylene luminous filament, polypropylene flame retardant filament, polypropylene air variable filament, etc.