the answer is there are many like null, ul and PVC wire
There are different types of plastics named polystone, resin, vinyl, PVC and ABS.
There are a variety of types of plastic. Some of these include Polystyrene (PS), Low Density Polyethylene (LDPE), and Polyvinyl Chloride (PVC).
copper Cast Iron PVC ABS Galvanized wrought Galvanized Steel
PVC with plastizer become a lot softer than PVCs without plasticizer
non_metallic metarials
Do the flame test; if you burn PVC, the flame will turn green at some point. The weight of them are different ,PVC is little heavy than PET .
To stain PVC or plastic in different colors, use tetrahydrofuran, also known as THF. This dissolved the outer layer of the PVC or plastic, so that the dye molecules can be absorbed.
As far as I know, the PVC is not hygroscopic, it doesn't absorb the moisture. There are several types of PVC though, so there could be some hygroscopic PVC resin, but I haven't encountered it yet. Normally it is dried by hot air driers, which are not suitable for hygroscopic materials, therefore I assume PVC is not hygroscopic...
One can purchase PVC boots at hardware apparel stores all over the world under "Equipment". One can also purchase PVC boots online at different websites that sell equipment pertaining to PVC boots.
pvc resin for pipe polyetylene for matress
They are similar but different. PVC is stronger & more rigid than polyethlene and is used for wastelines & polyethylene is used for water lines.