Big Bags for the Mining Industry

Mining cargo wears packaging harder than anything else. Quartz sand, ore concentrates and ground minerals are abrasive: during filling and handling they scour the fabric from inside, while high bulk density puts a large mass into a small bag volume.

Hence the design requirements: heavy fabric at the top of the range, a four-loop construction and reinforced seams. The bag ends up compact but heavy — its geometry is calculated so that it does not lean when lifted and stands squarely in the stack.

Fine materials such as kaolin and bentonite additionally require a liner: without one the finest fraction sifts through the weave and transfer losses become noticeable. For bulk shipments by full wagon, container and railcar liners are more economical.