List of Raw Materials Required for PVC Pipe Production
| Raw Material Category | Common Types/Examples | Main function |
| Main Materials | PVC resin (such as SG-5) | The primary base material that forms the main body of the pipe |
| stabilizer | Heat stabilizers (metal soaps/organic tin compounds), light stabilizers, antioxidants | Prevents PVC from decomposing during high-temperature processing, improves weather resistance, and extends service life |
| lubricant | External lubricants (e.g., paraffin wax/PE wax), internal lubricants (e.g., stearic acid/monoglycerides) | Reduce friction between the material and the equipment, improve material flow, and produce a bright surface on the pipe |
| Filler | calcium carbonate, talc, etc. | Reduce costs and improve certain physical properties |
| Modifier | Impact modifiers (e.g., CPE/MBS), processing aids (e.g., ACR) | Improve the impact resistance of the pipe material, enhance its processability, and prevent melt fracture. |
| Colorant | Pigments, color masterbatches | These pigments not only impart a specific color to the pipe material but also provide weather resistance and anti-aging properties (e.g., titanium dioxide, carbon black). |
| Other additives | Plasticizers, flame retardants, foaming agents, antistatic agents, etc. | To meet specific performance requirements, such as the need for plasticizers in flexible tubing |
Special Note: Rigid Tubing vs. Flexible Tubing
Rigid PVC pipes (such as drainage and water supply pipes): Typically, no plasticizers are added. If plasticizers are added, they reduce the pipe's rigidity.
Flexible PVC pipes: A large amount of plasticizers (such as DOP) must be added to make the product flexible.