Compared with pure plastic, foam plastic has low density, light weight, and high specific strength. Its strength increases with the increase in density. It has the ability to absorb impact loads and has excellent buffering and shock-absorbing properties, sound insulation and sound absorption properties, and thermal conductivity. Low, good thermal insulation performance, excellent electrical insulation performance, corrosion resistance and mold resistance. Soft foam plastic has excellent elasticity and other properties.
The properties and characteristics of EPS foam packaging materials are:
(1) The bulk density is very low, which can reduce the packaging weight and transportation costs;
(2) It has excellent impact and vibration energy absorption, and can greatly reduce product damage when used in cushioning and shock-proof packaging;
(3) It has strong adaptability to changes in temperature and humidity and can meet the requirements of general packaging conditions;
(4) Low water absorption, low hygroscopicity, good chemical stability, will not cause corrosion to the contents, and has strong tolerance to chemicals such as acids and alkalis;
(5) Thermal conductivity is low and can be used for thermal insulation packaging, such as ice cream cups, fast food containers, and insulated fish boxes;
(6) The molding process is convenient, and various foam pads, foam blocks, sheets, etc. can be made by molding, extrusion, injection and other molding methods. It is easy to carry out secondary molding processing. For example, foam sheets can be made into various fast food containers by thermoforming. In addition, foam plastic blocks can also be bonded to themselves or with other materials using adhesives to make various cushioning pads, etc.
