Zhengtai Waterproofing materials company was established in 2001 year with the registered capital of 1 billion , covering area of 60000 square meter .
An in-depth comparison of roofing membranes reveals that the primary differences between APP and SBS membranes lie in their chemical compositions and resulting physical characteristics. This understanding is crucial for construction professionals to make informed decisions that align with the specific needs of each project.
The key distinction between APP and SBS membranes is in the way each is modified to enhance the properties of the base asphalt. APP membranes are modified with atactic polypropylene, a thermoplastic polymer that improves the asphalt’s resistance to UV light and enhances its flexibility at high temperatures. In contrast, SBS membranes incorporate styrene-butadiene-styrene, a synthetic rubber that increases the asphalt’s elasticity and flexibility, particularly in colder conditions.
These chemical modifications lead to distinct physical characteristics for each type of membrane. APP membranes typically have higher melting points, which make them more resistant to thermal degradation. This allows them to maintain structural integrity and dimensional stability even in high-temperature environments. On the other hand, SBS membranes, with their rubberized composition, offer superior elasticity and flexibility in colder temperatures, reducing the risk of cracking or brittleness during cold weather.
The differences in physical properties also influence the installation methods for each membrane. APP membranes generally require heat for installation, usually through a torch application, to bond with the roofing substrate. This technique is ideal for environments where the membrane needs to withstand high temperatures without distortion. In contrast, SBS membranes offer more flexibility in installation methods. This versatility makes SBS membranes particularly suitable for a wider range of applications and climates.
