Our DW Liners are similar in concept to the Double Hull construction used in Oil Tankers a tank within a tank a tube within a tube. The outside liner protects the inner liner throughout the
rigors of the down-hole installation process ensuring integrity of the inner liner. The concept of independent layers versus homogeneous structures has been proven far superior. Because of its
effectiveness the concept is adapted to many different design applications. In the 1970s ICIs Canadian Division, then named CIL, developed a double wall polyethylene shipping sack for export
shipments. Testing showed a 35% + increase in puncture strength versus a single layered film of the same resin blend & equal combined gauge. More importantly it confirmed film propagation (when
scored PE film is prone to propagate in the machine direction) was greatly reduced.