Aluminium foil in food packaging

Aluminium foil is a very common metal material that is widely used in food packaging. Here is some important information about the use of aluminium foil in food packaging.

1. Thermal insulation: Aluminium foil has good thermal insulation properties, which can effectively isolate food products from temperature changes in the external environment. This can help keep food fresh and warm, especially important for hot food that needs to be kept warm.

2. Antioxidant properties: Aluminium foil has good antioxidant properties that prevent oxygen from the food from entering the interior of the package. This helps to extend the freshness period of the food and maintain its taste and quality.

3. Moisture resistance: Aluminium foil has a strong protection against moisture, which prevents the evaporation of moisture from the food or the penetration of moisture from outside. This is very important to maintain the moisture and taste of the food.

4. UV protection: Aluminium foil has good UV protection and can protect food from UV rays. This is important for certain food products, such as wine and fruit and vegetable products, where UV rays can lead to a reduction in the quality of the food.

5. Sealability: Aluminium foil can be easily combined with other materials (e.g. plastic) to form sealable food packaging. This helps to protect food from external contamination and spoilage.

6. Environmental friendliness: Aluminium foil is an environmentally friendly material that can be recovered and recycled. This makes aluminium foil packaging important in terms of sustainability.

In the field of food packaging, aluminium foil is used in a wide range of products, such as instant noodles, chocolate, coffee, milk powder, baked goods, condiments, etc. Its main advantage is that it provides excellent freshness retention and product integrity.

However, aluminium foil has some limitations in food packaging. Firstly, aluminium foil is costly and therefore not suitable for all food packaging needs. Secondly, aluminium foil is susceptible to tears and scratches during processing and needs to be handled with special care.

All in all, the use of aluminium foil in food packaging is based on its thermal insulation, oxidation resistance, moisture resistance, UV protection, sealability and environmental friendliness. When used and handled correctly, aluminium foil packaging can help keep food products fresh and of high quality, while having a low impact on the environment.