10 Most Active Volcanoes In The World: Mount Ulawun. 7. Taal Volcano, Philippines â The second most active volcano in the Philippines with 33 historical eruptions. All of these eruptions are concentrated on Volcano Island, an island near the middle of Taal Lake. Taal Volcano and Lake presents one of the most picturesque and attractive views in the Philippines.
PVC can be plasticised to make it flexible for use in flooring and medical products. Rigid PVC, also known as PVC-U (the U stands for unplasticised) is used extensively in building applications such as window frames and cladding.
Advantages of PVC. As mentioned earlier, PVC is a low cost material that is lightweight and as such, is easy to handle and install. Compared to other types of polymers, its manufacturing process is not limited to the use of crude oil or natural gas.