Snacks like potato chips are always crispy, crunchy and delicious!

Many people often find it hard to stop.

Did you know that the secret to the safe and tasty texture of such snacks is related to the effect of nitrogen and vacuum?

Here is the simple explanation for the secrets behind the snack bags. 

Why are snack bags always bulging?

Snack bags at the market are always bulging.

This is because nitrogen is packed inside. 

Why nitrogen?

That is because nitrogen is an inert gas, which has properties that make it difficult to react with other substances.

If there is oxygen in the snack bag, the fried snacks will be oxidized, resulting in a loss of its taste and deterioration of quality.

If the snack bag is filled with nitrogen, the inert gas nitrogen and the snack are less likely to react chemically.

This means that the snacks are less prone to oxidation, resulting in better taste and longer-lasting quality. 

In addition, inflating the snack bag with nitrogen has the advantage that it acts as a cushion and prevents the snack from cracking. 

Although there is a disadvantage of bulky snack bags, the advantage is greater in that the snacks are less likely to crack and the taste and quality last longer.

The inner surface of the snack bag has another secrets.

Even if nitrogen is added when packing snacks in a bag, if the bag itself is designed to allow oxygen in the air to pass through easily, the contents will oxidize, leading to a deterioration in the quality of the snacks.

This is why snack bags have a mechanism to keep the air out. 

The inside of the snack bag is covered with a silver film.

This is the thin film of aluminum.

This film allows oxygen in the air outside the snack bag to be shut out. 

The thin film of aluminum on the inside of snack bags is created using a technique called vacuum deposition.

This technology utilizes a mechanism whereby aluminum is heated in a vacuum and evaporated, causing it to stick together as a thin film.

Nitrogen and vacuum actually play a major role in snacks that always taste good.

When eating snacks, please think about the vacuum.

Vacuum is an active part of our daily lives.

We provide sputtering equipment that produces films under vacuum conditions.

For more information on our vacuum equipment, click here.