Any packaging material that can absorb or reduce the impact and vibration of packaging products under external forces during transportation and loading and unloading, and protect the goods, is called cushioning packaging material. The range of cushioning packaging materials is very wide, including paper scraps, various fibers, wood chips, foam plastics, etc.
The packaging characteristics of cushioning packaging materials include the following: first, absorption of impact energy: it has a good absorption effect on the impact force received by the product; Secondly, vibration absorption: Packaging products are not only affected by external impact forces, but also by vibration and speed. If the natural frequency of the product is the same as the frequency of the external vibration force, it will cause resonance and increase the amplitude. When it reaches a certain value, it will damage the product. Buffer packaging materials can absorb external vibration forces and reduce amplitude; Thirdly, resilience: The cushioning packaging material will deform under external load conditions, but when the external load is removed, it can restore its original form, that is, it has good resilience to deformation caused by static loads, impacts, and dynamic loads from the outside; Fourth, compression denaturation: the phenomenon of slow deformation of cushioning packaging materials with time under the continuous action of static load is called compression denaturation. This compression deformation should be as small as possible fifth, flexible, good flexibility sixth, applicable temperature and humidity: cushioning packaging materials can maintain their good cushioning performance at low temperatures, for example: polyurethane foam can be used up to 30 ℃, PS foam can be used up to -20 ℃, PE foam can be used up to 50 ℃ seventh, cushioning packaging materials can be used well acid resistance, alkali resistance, grease, organic solvents, salt resistance and light resistance: good anti-static property, easy processing and molding, easy operation, the price is cheaper, discard The materials are easy to reuse and burn, but they are treated without causing environmental pollution.
