The core properties of PVC welding wire include melting point, fluidity, tensile strength, and aging resistance. High-quality welding wire should have a melting point close to that of the material being welded (typically between 160-220℃) to ensure uniform fusion; excessive fluidity can cause the weld joint to collapse, while insufficient fluidity makes it difficult to fill gaps; tensile strength must reach at least 80% of that of the material being welded to prevent cracking; aging resistance is improved by adding stabilizers and antioxidants to extend service life.
Regarding industry standards, domestic standards mainly refer to GB/T 2408-2008 "Determination of Burning Performance of Plastics" and QB/T 2463.1-2018 "Plastic Welding Electrodes and Wires," which regulate the dimensional deviations, physical properties, and environmental indicators (such as heavy metal content) of welding wire.
