Freezing Technology

7.2.1.5 Requirements for packaging materials

The requirements for packaging materials for frozen foods to be measured include

1. tensile strength and elongation
2. tear strength
3. impact strength
4. stiffness
5. bursting strength
6. fold endurance
7. compression
8. grease resistance
9. water vapor transmission.

  A packaging material may be water proof without being water vapor proof. A water proof material will hold water and will not go to pieces in water. A water-vapor proof material prevents vapor from passing through it.

Packaging Machinery

The packaging operation can be divided into four major steps

1. Forming the package
2. Filling the package
3. Closing and sealing the package
4. Placement in the shipping container