The material of PVC Waterstop is mainly made of **polyvinyl chloride resin (PVC)** and a variety of additives. Its core characteristics and ingredients are as follows:
1. Main ingredients
Polyvinyl chloride resin (PVC): As a basic material, it provides elasticity and durability, accounting for the highest proportion.
Additives: including plasticizers (enhanced flexibility), stabilizers (heat-resistant and aging-resistant), fillers (improved mechanical properties), etc. The specific formula varies depending on the manufacturer and purpose.
2. Key features
Corrosion resistance: It can resist acid, alkali, salt and chemical solvent erosion, suitable for environments such as sewage treatment plants and chemical plants.
Low temperature resistance: brittle temperature ≤-30℃, some products can reach -37℃, suitable for cold areas.
Mechanical properties:
Tensile strength ≥12 MPa, some products reach 14 MPa.
Tear elongation ≥300%, adapt to concrete joint deformation.
Aging resistance: Anti-ultraviolet and oxidation, long-term outdoor performance is stable.
3. Comparison with rubber waterstop
Advantages: PVC has lower cost, better chemical resistance, and is easy to weld.
Limitations: Not as flexible as rubber, not suitable for high displacement or irregular joints.
4. Special modified types
High temperature resistant type: Add CPVC resin, temperature resistance can reach 90℃.
Environmentally friendly type: Use lead-free stabilizer, meet NSF 61 and other drinking water standards.
5. Application adaptability
Water conservancy projects (such as dam tunnels) require high pressure models (such as 350×10mm).
Chemical facilities give priority to products with acid and alkali resistant formulas.
By adjusting the formula and process, PVC waterstop can meet the needs of different projects, but the appropriate model needs to be selected according to the specific environment.
