polypropylene- Is it different from HDPE? Yes it is. To begin with, polypropylene is also called, "polypropene". it is a thermoplast polymer which is made from a monomer called propylene. Like HDPE it has a wide variety of applications such as packaging, labeling, textiles, ropes, stationery, automotive components and more. Like HDPE it is rugged and usually resists man chemical solvents and acids.
Density Differences:
Several things differentiate polypropylene from HDPE. Density is the first factor. The density of polypropylene is between 0.895 and 0.92 g/cm². High Density Polyethylene is known for it's big strength-to-density ratio. The density of HDPE can range from 0.93 to 0.97 g/cm³. HDPE can be more rigid as a result. polypropylene, because of its lower density is used for molding parts with lower weight and more parts of a certain mass of plastic can be produced.
Temperature Differences:
HDPE has a working temperature of 212 degrees F to 200 degrees F. Polypropylene has a melting point between 266 degrees F to 340 degrees F.
U.V. and Chemical Resistance
Polypropylene has good chemical resistance like HDPE but it has poor UV resistance -unless it is stabilized with additives. HDPE is resistant to many different solvents and has a wide variety of applications. It protects the environment by forming a chemical-resistant barrier to prevent the pollution of soil and groundwater by the liquid constituents of solid waste.
A lot has been written about both HDPE and Polypropylene. Please visit the web to learn more about these very versatile plastics.
*Plastic Sheeting - thickness for what application
* Tapes- thicknesses and applications
* Enka Products applications and options
and many more products.