THE BEER-LAMBERT LAW

Beer Lambert Law is used to compare the degree of absorption/blocking of light (UV Light) of the material (polymer) used.

In order to protect the material and the contents of the material by blocking or absorbing UV light, select a high-value UV stabilizer to increase the (added amount) and increase the (material thickness) to increase A (absorption).

If the absorbance of a specific material, “A”, is 0, light is transmitted 100%, and as the value of “A” increases, the degree of light transmission decreases.

Additionally, the transmittance T (transmittance) can be calculated using the absorbance A using the following equation.

The photo below is an advertisement for a previously popular drink, a carbonated drink with apple and grape flavors. Colorless PET bottles used for packaging use UV absorbers.

By maintaining the apple and grape flavor and aroma of drinks that are sensitive to UV light for a long time, the shelf life of the product can be dramatically extended.