Inside the base of a normal dolav liner, you find four triangular pockets that form naturally from the side gussets. When the liners are filled, these pockets can trap your materials and result in loss of product. When we manufacture dolav liners, we can apply an additional 45 degree seal on each of the four gusset panels to close the pockets and prevent product entrapment.
On a normal dolav liner with a standard seal, the bottom seal can rupture from the inside when the liner is filled with a large volume of fluid. The additional mitre seals strengthen the bottom seal preventing rupture or leakage. That’s why mitre seal bags and K-seal bags are very popular in the food processing industry as they prevent the bottom of gusset liners leaking.
Another advantage with mitre seal and K-seal bags is the additional seals allow for down gauging. This means reducing the thickness of the current specification to reduce plastic usage and cost. For example, a 50 micron liner could be reduced to 35-40 micron, reducing plastic usage by 20-30% and also reducing the cost. Depending on how the dolav liners are used, this could be reduced further.
On a normal gusseted dolav liner without additional mitre seals, the stress points on the bottom seal create holes. These are eliminated with mitre seals.
These bags are also available with a double bottom seal or wound on a roll for tear off.