The lightproof performance of functional design of flexible packaging
The influence of light on the quality of food is mainly manifested in the following aspects.
(1) Oxidize the fat in the food and cause rancidity.
(2) Change the color of the pigment in the food by chemical change.
(3) Destroy the effective nutrients in food and vitamins.
(4) cause changes in protein and amino acids in food.
(5) cause the food to be dry, hard and aged or softened and dissolved.
In order to reduce the impact of light on food, flexible packaging generally adopts the following methods: preferentially select light-shielding and light-blocking materials, use packaging materials to block and block light, or absorb or reflect light to reduce or prevent light from directly passing through food. ; What's more, dark printing is carried out on the surface material of the flexible packaging, which can achieve shading and block the direct exposure of light to the food to a certain extent.
