Production process and characteristics of polypropylene stretch yarn!
Production process and characteristics of polypropylene stretch yarn!
polypropylene stretch yarn is a type of polypropylene fiber product that has been processed through stretching technology, with various characteristics and wide applications. The following is a detailed introduction about it:
Production process:
Raw material preparation: Select high-quality polypropylene slices to ensure the purity and uniformity of the raw materials. Then clean the polypropylene slices, remove impurities, and dry them to ensure that the moisture content of the slices meets the process requirements.
Melt extrusion: Melt polypropylene slices into a melt at high temperature, and use a screw extruder to extrude the melt to the spinneret to prepare for spinning.
Spinning: The melt is sprayed out through a spinneret to form primary fibers, which are then cooled and solidified to form polypropylene fibers.
Pre stretching: Pre stretching of newborn fibers to improve their mechanical properties.
Stretching: According to the process requirements, control the stretching ratio to achieve the desired fineness and strength of the fiber. Accurate control of process parameters such as stretching temperature, speed, and stretching ratio is required during the stretching process. Temperature control is crucial, and appropriate temperature is necessary
It can soften polypropylene raw materials and have a certain degree of fluidity, thereby achieving uniform stretching and plastic deformation.
Curling: Using appropriate curling methods to give fibers a degree of curl to meet the requirements of subsequent processing. It is necessary to control the curl of fibers according to product requirements to ensure good adhesion and recovery of fibers.
Cutting (for short fibers): Control the cutting length according to process requirements to ensure that the fiber length meets product standards. Mechanical or airflow cutting methods can be used to ensure that the fiber incision is neat and smooth.
Packaging: The fibers are sorted to remove impurities and defects, and then packaged to protect them from external factors and facilitate transportation and storage.
characteristic:
High strength: After stretching treatment, the molecular chains of polypropylene stretched yarn are fully stretched and oriented, giving it high strength and the ability to withstand large tensile forces, which is advantageous in some fields that require high strength.
Low weight: The density of polypropylene itself is relatively small, which makes the polypropylene drawn yarn lightweight. This is very important for some applications that have strict weight requirements, such as aerospace, outdoor equipment, etc., and can reduce the overall weight of the product.
Good wear resistance: During use, polypropylene stretch yarn has good wear resistance, is not easily worn or broken, and can maintain a long service life. Therefore, it is suitable for making products that require frequent friction or wear, such as ropes, woven belts, etc.
UV resistance performance: Polypropylene material has a certain degree of UV resistance. After stretching treatment, the polypropylene stretched yarn can resist UV erosion, is not easy to age and degrade, and is suitable for outdoor products, building materials and other fields when used outdoors.
Good chemical stability: Polypropylene drawn yarn has good resistance to chemicals such as acid and alkali, and can maintain good performance stability even in complex chemical environments.
Ningbo Dazhong Chemical Fiber Industry Co., Ltd. long-term production and management: PP yarn, polypropylene filament, PP FDY yarn, polyester staple fiber, polypropylene full draft wire, polypropylene POY yarn, polyester POY yarn.