The bag will come into contact with the food and be used to pack and protect the food. Generally speaking, the packing bag is made of film material. Food packaging bags can reduce food damage during transportation. Each food packaging bag has different styles and types, which can be easily divided into commodity categories. When designing food packaging bags, we should pay attention to some special specifications.

1、 Strength requirements.

Packaging can avoid external force damage such as pressure, impact and vibration. There are many factors that affect the strength of food packaging design, including transportation mode (such as automobile, aircraft, etc.). Stacking form (such as multi-layer stacking). In addition, environmental factors need to be considered, including natural climate and sanitary environment.

2、 Barrier requirements.

Barrier is one of the important properties of food packaging design. Due to the poor barrier of packaging design, many foods are prone to food quality problems in the storage process. The barrier requirements of packaging design depend on the characteristics of the food itself. Its characteristics include external barrier, internal barrier or selective barrier, including air, water, oil, light, microorganism, etc.

3、 Breathing requirements.

Many foods remain respiratory during storage. Therefore, the design material or container of this food packaging bag has air permeability, or can control breathing, so as to achieve the purpose of fresh preservation.

External requirements.

When designing food packaging bags, we also need to pay attention to some external requirements, and reflect the characteristics of goods through packaging. These are the external image, expression and means of food.

5、 Safety requirements.

The design of packaging bags also has safety requirements, including hygiene safety, handling safety, etc., and also needs to reflect the use safety. The health and safety part is mainly the environmental protection materials used in the packaging bag, not the materials harmful to human body. In terms of packaging design technology, the nutrition, color and taste of processed food should remain unchanged as far as possible, including the safety of consumers after shopping. The purpose of safe use is to ensure that consumers will not be injured in the process of opening and eating.

In addition to the above, there are many inherent requirements for the design of food packaging bags, such as heat resistance, light resistance, crushing resistance, moisture resistance and so on. In addition, food packaging can also be used as a way of food publicity. In the outer packaging, we can reflect the characteristics of food, eating methods and various nutrients, so as to promote products.