If you ask a processor what type of PE they are running, a typical response will be, âIâm running a 7-melt, 953 material.â Translation: a material with a nominal melt index of 7 g/10 min. and a density of 0.953 grams/cm3.
If the cause of the popping sound is due to cavitation then this can help relieve pressure in the joints and provide some relief from neck pain and other joint pain, although this is likely to just be temporary.
Cracking the neck joint (also called neck popping) or any joint actually leads to release of fluid or gas within the joints. It is an effect of a sudden development of temporary vacuum develops and is filled by gas, which was trapped in the joint fluid. Thus, when you stretch that joint, 'pop' or crack it goes.