What are laminate tubes made of?

[burhanipack1]

Contingent upon the item to be bundled, overlay cylinders can have a hindrance layer of aluminum, plastic or fired. The most well-known cylinders can either be Aluminum Obstruction Cover (ABL) or Plastic Boundary Overlay (PBL) contingent upon the materials utilized in the development of the cylinders.



plastic laminated tube

[1DooD]

And the purpose of said material is......?