How to ensure the purity of materials and the quality of yarn during the production of PLA Biodegradable Monofilament Yarn?

PLA Biodegradable Monofilament Yarn uses high-quality PLA chips as raw materials. These chips should come from reliable suppliers and undergo strict inspection to ensure that they meet production requirements. The physical and chemical properties of the raw materials are tested, including melting point, moisture content, intrinsic viscosity, etc., to ensure that they meet production standards.
PLA chips must be dried before melt spinning to remove moisture. During the drying process, the drying temperature and time should be strictly controlled to avoid overheating and degradation of the chips. The moisture content of the dried chips should be controlled within a certain range to ensure the smooth progress of the spinning process. The production environment should be kept clean and dry to avoid the entry of pollutants such as dust and oil. Clean and maintain the production equipment regularly to ensure the sanitary conditions of the production process.
During the melt spinning process, parameters such as spinning temperature, pressure and speed should be strictly controlled to ensure uniform melting and spinning of PLA chips. The selection of spinning temperature should take into account the contradiction between the heat sensitivity of PLA and the high viscosity of the melt to ensure good fluidity and spinnability during the spinning process.
Select spinning components suitable for PLA spinning, such as spinning manifolds, spinnerets, etc. Clean and maintain the spinning components regularly to ensure that they are unobstructed and avoid yarn quality problems caused by blockage and wear. During the stretching process, appropriate stretching temperature and speed should be selected to improve the physical and mechanical properties of the fiber. During the winding process, the winding tension and overfeed rate should be controlled to ensure the orientation and uniformity of the fiber. Regularly check the winding equipment to ensure its stable operation and avoid problems such as yarn breakage and knotting.
Regularly test the quality of the produced yarn, including testing of physical performance indicators such as breaking strength, breaking elongation, and linear density. Observe the surface morphology and internal structure of the yarn under a microscope to ensure that it is free of defects and impurities. Trace and analyze the unqualified products, find out the causes and take corrective measures to improve product quality.
The yarn should be kept dry, light-proof, and moisture-proof during storage and transportation to avoid adverse factors such as high temperature and humidity. Use appropriate packaging materials and methods to ensure that the quality and performance of the yarn are not damaged during storage and transportation.