At present, people are no longer unfamiliar with PVC waterproofing membranes and TPO waterproofing membranes, and these two types of waterproofing membranes have also been widely used. So what is the difference between the two? Let's take a look with the editor below!

PVC waterproofing membrane is mainly composed of polyvinyl chloride resin, with plasticizers and modified materials added. It is processed through main processes such as rolling and extrusion, and belongs to polymer materials.

TPO waterproofing membrane is a new type of waterproofing material made from thermoplastic polyolefin (TPO) synthetic resin, which combines ethylene propylene rubber and polypropylene using advanced polymerization technology. It is made by adding antioxidants, anti-aging agents, and softeners; It is a new material that has become popular in the United States and Europe in recent years.

What are the differences between the two in terms of material properties?

There are plasticizers in the ingredients of PVC waterproofing membranes, and the migration of plasticizers can cause the membrane to lose flexibility, extensibility, and even fracture. Its composition contains chlorine, and during hot air welding, it will produce certain harmful gases. Construction in relatively enclosed underground spaces is not environmentally friendly.

TPO waterproofing membrane ingredients do not contain plasticizers and have high flexibility. They will not become brittle due to the migration of plasticizers and can maintain long-term waterproofing function. It does not contain chlorinated polymers or chlorine gas in its composition, and there is no chlorine gas release during welding and use, which is harmless to the environment and human health.

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