The core material foam plastic is a type of polymer material formed by a large number of gas micropores dispersed in solid plastics. wide. Almost all kinds of plastics can be made into core foam, and foam molding has become an important field in plastic processing. A plastic with numerous microscopic pores inside, which is made of resin as the main raw material.

Light weight, heat insulation, sound absorption, shock resistance, corrosion resistance, soft and hard, widely used as heat insulation, sound insulation, packaging materials and car and ship shells. Compared with pure plastics, the core material foam has low density, light weight, high specific strength, its strength increases with the increase of density, the ability to absorb shock loads, excellent buffering and shock absorption performance, sound insulation and sound absorption performance, thermal Low conductivity, good thermal insulation performance, excellent electrical insulation performance, corrosion resistance and mildew resistance. Flexible foam plastic has excellent elasticity and other properties.

Plastic with many tiny pores inside. It can be prepared by mechanically stirring by introducing air or carbon dioxide to make it foam, or chemically by adding a foaming agent. There are two types of closed cell type and open cell type. The pores in the closed-cell type are isolated from each other and have buoyancy; the pores in the open-cell type are connected to each other and have no buoyancy. Available in polystyrene, polyvinyl chloride, polyurethane and other resins. It can be used as thermal insulation and sound insulation material, and has a wide range of uses.

The bulk density is very low, which can reduce the packaging weight and reduce the transportation cost. It has excellent shock and vibration energy absorption, and can be used for buffering and shock-proof packaging to greatly reduce product damage. It has strong adaptability to changes in temperature and humidity, and can meet the requirements of general packaging conditions. It has low water absorption, low hygroscopicity, good chemical stability, will not corrode the contents, and has strong resistance to chemicals such as acid and alkali. Low thermal conductivity, can be used for thermal insulation packaging, such as ice cream cups, fast food containers and thermal insulation fish boxes.

The molding process is convenient, and various foam pads, foam blocks, sheets, etc. can be made by molding methods such as molding, extrusion, and injection. It is easy to carry out secondary molding processing, such as foam sheets can be made into various fast food containers by thermoforming. In addition, the foam blocks can also be bonded by themselves or with other materials with adhesives to make various cushioning pads and the like.