Why Do Lays Chips Burn and Smell Like Plastic?

Lays chips, a popular snack in households across the globe, can sometimes exhibit an unpleasant behavior: they burn and smell like plastic. While this can be concerning, it is more common than one might think, and the reason behind this phenomenon is quite scientific. This article delves into the causes of such behaviors, providing you with a better understanding of the snack you enjoy.

Understanding the Composition of Lays Chips

Chips, particularly those from well-known brands like Lays, consist of a complex blend of ingredients. The primary components include commodities like wheat, potatoes, or corn, which are processed to yield starch and cellulose. These are essential in giving the chips their texture and consistency.

Role of Starch and Cellulose

Starch is a carbohydrate that provides the chips with their structure. It is a large molecule composed of long chains of glucose units, which makes it highly combustible. When heated to high temperatures, starch can undergo a series of chemical changes, one of which is combustion. This explains why Lays chips, which are designed to be fried at high temperatures, can sometimes ignite when subjected to further heat or when left in a very warm environment.

Improper Storage and Handling

The smell of plastic that emanates from burning Lays chips is a different issue. It occurs due to the thermal decomposition of these carbohydrates. During this process, the molecules of carbohydrates break down into smaller and simpler components. Some of these products of decomposition have chemical properties similar to those produced by the decomposition of certain types of plastics. This is why you might perceive a plastic-like odor when the chips burn.

Chemical Perspective: Combustibles and Thermal Decomposition

From a chemical standpoint, the key elements are fat and carbohydrates. Fat, as a component of oils used in frying, is also combustible and contributes to the burning sensation. When combined with carbohydrates, which are rich in energy and thus readily decompose, the chips can easily burn and emit the distinctive plastic-like odor.

Preventive Measures and Safety Tips

To avoid the burning and undesirable odor:

Avoid Overheating: Ensure that the temperature when frying chips is appropriate and does not exceed the safe limit for your cooking equipment. Overheating can lead to the formation of volatile compounds. Avoid Leaving Them Unattended: Never leave chips or any fried food unattended. They can easily catch fire if they are not being monitored. Proper Storage: Store Lays chips in a cool, dry place away from direct heat sources. Damaged packaging can also contribute to off odors, so ensure the chips are tightly sealed. Check the Quality of Chips: Fresh chips are less likely to burn and produce odd odors. If you notice a significant change in the smell or appearance of your chips, it may be time to consider a different brand.

Conclusion

In conclusion, the burning sensation and plastic-like smell associated with Lays chips can be attributed to the inherent combustible properties of their ingredients, combined with improper storage and handling. Understanding these factors can help you enjoy your favorite snack without the distress of overcooked chips. Remember to handle your chips with care and store them properly to avoid any unwanted outcomes.

References

1. Carbohydrate 2. Combustion of Starch and Cellulose 3. Thermal Decomposition and Odors