MDPE has good shock and drop resistance properties.
Stress cracking resistance is better than that of HDPE.
MDPE is typically used in gas pipes and fittings, sacks, shrink film, packaging film, carrier bags, and screw closures.
[2] In the United Kingdom, black (or blue) MDPE is often used for water and waste water plumbing, and may also be referred to as 'black alkathene.'
This article about polymer science is a stub.