Question

3. Why does milk in polypacks not get spoiled?​

Answer 1

Answer:

The milk in the polypacks is pasteurized before packing. Also the polypacks are air tight and does not allow microbes to enter inside which prevents milk from spoiling.

Answer 2

Explanation:

Until packaging the milk throughout the polybags is pasteurized. These bags are indeed tightly sealed and don't encourage or permit bacteria into which milk cannot be spoiled