There is a tendency to utilize underground space for the less ornamental purposes of civilization; there is the Metropolitan Railway in London, for instance, there are new electric railways, there are subways, there are underground workrooms and restaurants, and they increase and multiply.
Polystyrene can be naturally transparent, but can be colored with colorants. Uses include protective packaging (such as packing peanuts and CD and DVD cases), containers (such as clamshells), lids, bottles, trays, tumblers, and disposable cutlery.
Polyester resin is commonly used in the production of glass reinforced plastics, which may be used to create surf boards. One type of resin material is acrylic resin, which is used to make cell phones and other items. Polypropylene resin is widely used to make plastic bottles for milk, soda and other beverages.PVC, used to make lightweight pipes, is a resin material.ome examples of the products made from plastic resin include soda containers, milk jugs, and prescription pill bottles. Each of these products are made with polyethylene resin material, which is a type of plastic resin. Other types of plastic resin include polyvinyl chloride (PVC), polypropylene, and polystyrene.