Paper, as the most traditional packaging material, plays a very important role in food packaging. In developed countries, paper packaging materials account for 40% to 50% of the total packaging materials. The hygiene indicators, physical and chemical indicators and microbial indicators of food packaging base paper have relevant regulations. This article will introduce you to the methods of food packaging materials testing.
The metal materials used in current food packaging include iron, aluminum, stainless steel, and the like. The packaging material can use metal, because the metal has better ductility and is more convenient to process. The outer packaging formed by the metal has better protection for the internal food, and the metal is easy to be packaged and thus can be promoted.
However, metal is good for paper, glass and ceramics, but the price is relatively high and the packaging cost is not cheap. Moreover, the chemical nature of the metal is relatively active, it is oxidized and eroded in the air, and it is easy to chemically react with foods containing strong acidity and alkalinity, thereby causing pollution to food. Therefore, at present, although metals can be widely used and have an important position, their use is limited, and they are generally used for canned packaging.
Environmentally friendly packaging materials should not pollute the environment or cause pollution during the entire life cycle. That is to say, environmentally-friendly packaging products should not cause pollution to the human body and the environment from the raw material collection, data processing, manufacturing products, product use, waste recycling and recycling to the final disposal.
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