Everything You Need to Know about Food Packaging
Food provides all kinds of nutrients necessary for people's life. Generally speaking, a person's reasonable nutritional structure should be pyramid-shaped; the main food is located at the bottom of the tower, the others are non-staple food, condiments, and the top is candy, beverages and others. Accordingly, for the various products common in the food industry, food packaging is generally divided into categories according to their varieties and physical properties;
Namely: the packaging of grain and grain processed foods, fruit and vegetable processed foods, poultry, livestock, meat and aquatic products processed foods, soy, egg and milk processed foods, oil and fat processed foods, condiments, candies, beverages and cold drinks, etc.
In view of the wide variety of food, different and endless, and most of the organic substances are susceptible to external microbial infection and physical, chemical, mechanical and other adverse effects and deterioration and damage. Therefore, most of the packaging is required to have strong protection, use and promotion functions, so that the sterilization, miniaturization, diversification, simplification, mechanization and automation of food packaging have become the mainstream of the development of the times.
Different packaging methods for different foods
No matter what kind of packaging is used; first of all, we must start from all aspects of the inner packaging, and choose the packaging materials and packaging containers reasonably. In a nutshell:
①For liquid food, plastic bottles, glass bottles, metal cans, bags, boxes and cups made of composite materials are commonly used.
② For semi-fluid food, plastic or glass jars, bags, boxes, cups, etc. made of composite materials are commonly used.
③ For powders, granules and foods mixed with liquids, metal cans, plastic jars, bags, boxes and cans made of composite materials are commonly used.
④ For single or multiple aggregated solid foods such as blocks, sheets, strips, and similar spherical and hemispherical shapes, larger plastic boxes, metal cans, bags, trays, boxes, etc. made of composite materials are commonly used.
In short, the current food sales packaging containers, bottles, cans, boxes, etc. made of metal and glass account for a small proportion, and there is a gradual downward trend, and they are mostly used for gift packaging or special packaging. Boxes and trays made of thin cardboard are generally used for outer packaging due to their poor barrier properties.
Only bags, boxes, cups, etc. made of plastic film-based composite materials are sufficient to protect food and beautify the appearance of unique functions, and have various shapes, easy processing, resource saving, low cost, light use, and strong adaptability. It is almost all-encompassing (usually except for gas-containing liquid materials), and it is all-purpose (extended to all occasions on land, sea and air), and has great prospects for development. In particular, the combination of the inner packaging bag and the outer packaging box can more effectively promote the wide application of small food packaging.
The future of food packaging
With the acceleration of people's daily work rhythm, the enrichment of nutritious and healthy diets, and the enhancement of environmental protection awareness, many new requirements for food and its packaging will inevitably be put forward in the future.
What is striking today is that in view of the rapid popularization of refrigerators and microwave ovens and the gradual maturity of other related conditions, it will not be long before the development of quick-frozen food as convenience food and fast food can enter a large number of households and enterprises and institutions (including services, industries such as tourism).
In the meanwhile, we must vigorously develop new technologies and new products such as vacuum packaging, vacuum inflatable packaging and aseptic packaging, so that they can be organically combined with quick-frozen packaging to jointly promote food packaging to a higher level.