TPO (thermoplastic polyolefin) waterproofing membrane has good aging resistance, mainly due to several key factors in its material composition and structural design:
1. Material essence: TPO is a thermoplastic polymer copolymerized by polypropylene and ethylene-propylene rubber. This material is naturally resistant to UV rays and oxidation, and is not easily decomposed or degraded under the influence of sunlight, oxygen and other environmental factors.
2. Anti-UV additives: Anti-UV agents and antioxidants are usually added to TPO membranes, which can effectively resist UV radiation and delay material aging. Ultraviolet rays are one of the main causes of aging of waterproof materials, and adding these ingredients can significantly improve their aging resistance.
3. Thermal stability: TPO material has good thermal stability and is not easy to decompose or deteriorate in high temperature environments. This allows it to maintain good physical and chemical properties without embrittlement or loss of elasticity when exposed to high temperatures or extreme climatic conditions.
4. Low migration plasticizer: TPO waterproof membrane does not use traditional plasticizers (such as phthalates common in PVC materials), thus avoiding material aging and damage caused by plasticizer volatilization or migration. Performance degradation issue.
5. Thermoplastic repairability: TPO is a thermoplastic material that can be remelted by heating to repair cracks or damage. This feature can be repaired through hot air welding technology when the coil is damaged or aged, thereby extending its service life.
In summary, TPO waterproof membrane has strong aging resistance due to its excellent chemical stability, UV resistance, and repairability, and is suitable for long-term exposure to outdoor environments.