The production process of polypropylene high-strength fibre mainly includes the following steps :
Raw material preparation : polypropylene (PP) is used as the main raw material, and additives such as antioxidant and ultraviolet stabilizer are added as required to improve weather resistance and stability. Polypropylene and additives are pre-crystallized to improve the fluidity and stability of the melt.
melt extrusion : through a screw extruder, the pre-crystallized polypropylene and additives are fused to form a uniform melt.
spinning : the melt forms a fine flow through the spinneret and enters the cooling medium for cooling and solidification. According to product specifications, adjust the spinneret aperture and spinning speed, control the trickle diameter and cooling conditions.
stretch shaping : multistage stretching of the primary fiber to improve the strength and orientation of the fiber. During the drawing process, the drawing temperature, speed and tension should be controlled to ensure the stability of the fiber properties.
Heat treatment : Through heat treatment to make the wire more stable, and further improve the physical properties of polypropylene high-strength fibre.
winding and packaging : The stretched and shaped fiber is wound on the bobbin for subsequent processing and use. The tow should be sealed to prevent moisture and contamination.
In addition, in order to improve the strength of polypropylene high-strength fibres, the pre-spinning draft and post-spinning draft double twist two-step method can be used, the use of large length-diameter ratio screw extruders and large length-diameter ratio spinning components spinnaging capillaries, and the use of inexpensive polypropylene powder, adding high-density polyethylene and polypropylene cooling masterbatch to optimize the production process and improve the uniform strength of the fiber.
Jiangyin Jinmeng Textile Co., LTD., is a professional engaged in polypropylene high-strength fibre, polypropylene industrial silk, polypropylene luminous silk, polypropylene anti-UV ribbon, polypropylene flame retardant ribbon, polypropylene ribbon, polypropylene wire, polyester wire and other products production enterprises, located in the south of Taihu Lake north of the Yangtze River Jiangyin Yunting street industrial park, the traffic is very convenient.
How is polypropylene high-strength fibre produced?
