1. The inspection items of single film bags for food packaging are mainly divided into the following categories:

The appearance shall be free from defects such as bubbles, perforations, water marks, broken tendons, poor plasticization, fish eye stiffness and so on.

The deviation of specification, width, length and thickness shall be within the specified range.

Physical and mechanical properties include tensile strength and elongation at break, which reflect the tensile capacity of the product during use. If this item is unqualified, the food packaging bag is prone to rupture and damage during use.

2. The inspection items of food packaging composite film bags are mainly divided into the following categories:

The appearance shall be flat without scratch, scald, bubble, oil break and wrinkle, and the heat seal shall be flat without virtual seal. The film shall be free from cracks, pores and composite layer separation. No impurities, foreign matters, oil stains and other pollution.

The bagged soaking solution shall be free of peculiar smell, odor, turbidity and decolorization.