The production process of polypropylene high-strength yarn mainly includes the following steps:

Preparation of raw materials: Choose high-quality polypropylene raw materials to ensure that their purity and quality meet the production requirements.Dry the raw material to remove moisture and impurities to improve the quality and performance of the fiber.

Melt Spinning: The dried polypropylene raw material is heated to a molten state and extruded through the spinneret to form a fine stream.It is cooled and cured in air to form fibers. This process requires control of parameters such as temperature, pressure and spinneret speed to ensure fiber quality and performance.

Stretching and shaping: The primary fibers are stretched to improve the strength and orientation of the fibers. Stretching times are generally between 3-5 times, depending on product requirements. After stretching, the fibers are heat-set to eliminate internal stress and stabilize the fiber size and properties.

Winding and packaging: The polypropylene high-strength fiber is wound after shaping to form a certain specification of silk cylinder or silk cake. Package the product to ensure that it is not damaged during transportation and storage.