Packaging composite material comprising polarizing films and packaging comprising said material

A packaging composite material comprising:

• a polarizing layer, comprising two or more layers of uniaxially-stretched polarizing film, wherein each layer of polarizing film has been uniaxially stretched in a stretching direction and wherein each layer of polarizing film has a polarization direction corresponding to the stretching direction;
• a first surface layer located on one side of the polarizing layer;
• and
• a second surface layer located on another side of the polarizing layer;
• wherein the packaging composite material further comprises surface layer bonding layers located between the polarizing layer and the first and second surface layers respectively,
• wherein the polarization directions of at least two layers of the two or more layers of polarizing film have an included angle which is not 0°, and
• wherein the packaging composite material has a light-blocking effect.