MDPE is a highly versatile material that combines the super pliable characteristics of LDPE (low density polyethylene) and the stiff, tough aspects of HDPE (high density polyethylene).
In some parts of the world the colour of the MDPE will determine its use. Yellow MDPE is used for gas distribution whilst blue MDPE is used in plastic pipes to carry wastewater and water supply. This is due to the plastics moisture and chemical resistance as it will not corrode or react to the variety of naturally occurring chemicals in the ground.
This property also makes it the perfect choice for liquid storage tanks such as water butts and oil tanks for the agricultural and haulage industries.
Black MDPE pipes are used for water systems above ground as it is also extremely robust, offering high-impact resistance, and can therefore withstand the high-pressure required to deliver mains water.
For more domestic usage MDPE bottles are the favourite choice for any kind of ‘squeezy’ bottle. They can be supplied with both pointed nozzles and caps, so you get all the benefits of flexibility. MDPE has good shock and drop resistance properties too and its stress cracking resistance is better than that of HDPE.