PVC welding wire's core material is polyvinyl chloride (PVC) resin. Depending on the application, plasticizers, stabilizers, fillers, and other additives are added, resulting in two types: rigid PVC welding wire and flexible PVC welding wire. Each type possesses specific characteristics suitable for welding PVC materials.
Rigid PVC welding wire contains little or no plasticizer, making it hard, with high tensile strength (≥50MPa), strong corrosion resistance, and ability to withstand chemical media such as acids, alkalis, and salts. Its softening temperature is 80-90℃, and the weld joint strength is close to that of the base material, making it suitable for welding rigid PVC products.
Flexible PVC welding wire contains more plasticizer, making it soft and flexible, with high elongation at break (≥200%), good low-temperature flexibility, and maintaining elasticity even at -10℃. Its softening temperature is 60-70℃, and the weld joint deforms synchronously with the base material, making it suitable for welding flexible PVC products. Both types of welding electrodes have good thermoplasticity, can be firmly fused with PVC substrate after being heated to a molten state, and have excellent insulation properties and are not flammable (oxygen index ≥35), making them suitable for the performance requirements of various PVC welding scenarios.
