Food Packaging Material Types and Features

In the food industry, commonly used packaging materials are polymers, metals, paper and glass, as well as ceramics, bamboo and various composite materials.

Polymer packaging materials include plastics, rubbers, and coatings. Plastics can be divided into thermoplastics and thermosetting plastics according to the nature of heat (the future development of plastics); rubber can be divided into natural rubber and synthetic rubber according to the source of the base material; coatings can be divided into high-temperature film-forming coatings according to film forming conditions and Normal temperature film-forming coatings can be divided into epoxy resin coatings, organic fluorine coatings, organic silicon coatings, perchloroethylene coatings, urushiol coatings, and paraffin coatings. Due to its good barrier properties, heat resistance and corrosion resistance, coupled with the characteristics of light weight, easy use, rich colors, and diverse appearance, polymer materials have become extremely important food packaging materials and have been widely used. The biggest drawback of polymer materials is that most of them are not easily degradable, and incineration will produce toxic gases.

Metal packaging materials are commonly used iron, aluminum, stainless steel and various metal alloys. Metal materials have relatively high mechanical strength, not only strong, pressure-resistant, non-friable, but also have ductile, seizable, weldable, and bondable processing characteristics, plus good barrier properties and airtightness. It occupies an important position in food packaging materials.

Paper packaging materials have many advantages, such as low price, good protective performance, convenient storage and transportation, easy to decorate and decorate, no contamination of contents, good recycling performance, and easy compounding with other materials to further improve the properties of materials. Currently, they are widely used. One of the food packaging materials.

The glass packaging material has good stability, barrier property, hygienic property, and preservation property, and has many advantages such as being not easily deformed, easy to achieve sealing of the lid, re-sealing after opening, easy to beautify, abundant raw materials, low cost, and the like.