(2) Fold-over wrinkle. This defect occurs during sealing when one side of the
laminate folds on itself, thus reducing the integrity of the seal. It is likely to cause a
hazardous or unsafe condition.
(3) Bloater. Entrapped air in a menu bag is not a defect if the pouch is not
bulging. If there is bulging, it is an early sign of possible deterioration and may restrict
the use of the product.
(4) Loss of vacuum. This refers to flexible containers. The loss of vacuum is
evident because the container does not cling tightly to the product. This makes the
product less useful than it should be and is an early sign of deterioration.
f. Breakdown of Pouch Material.
(1) Delamination. Delamination is the separation of the laminate layers. This
defect is most often noticed as a separation of the outer (polyester) layers from the
middle (aluminum foil) layer.
(2) Brittleness. Brittleness is a reduction in the flexibility and strength of the
laminate and may result from the stresses of time and temperature. Brittleness may
lead to tears, cuts, or holes in pouches.