1. EPE (Expandable Polyethylene): polyethylene foam plastic, commonly known as pearl cotton.
Features: small density, good flexibility, high recovery rate; shock resistance better than polystyrene plastic; independent bubble structure, low surface water absorption; good penetration resistance; acid, alkali, salt, oil and other organic solvents , Excellent aging resistance; no flowing at high temperature, no brittleness at low temperature.
2. EPS (Expanded Polystyrene): Polystyrene foam is a light polymer.
It uses a polystyrene resin to add a foaming agent, and at the same time heats it to soften it, generating gas, and forming a rigid closed-cell foam. This uniformly closed cavity structure makes EPS have the characteristics of low water absorption, good thermal insulation, light weight and high mechanical strength.
3. EPP (Expanded polypropylene): polypropylene plastic foam material
It is an excellent high-crystalline polymer / gas composite material. With its unique and superior properties, it has become the fastest-growing new type of environmentally friendly compression buffer insulation material. EPP products have very good shock absorption performance, high recovery rate after deformation, very good heat resistance, chemical resistance, oil resistance and heat insulation. In addition, their light weight can greatly reduce the weight of items.
The difference between the three meterials:
First, the buffer performance is different
1. EPP, which can be molded out, can be pre-expanded into particles, and then formed into various shapes in the mold. It has good toughness, is not easy to break, and has good cushioning properties.
2. EPE, which can be extruded or foamed, can be made into sheet or sheet or pipe, and then punched, cut, bonded and formed. It has good toughness, is not easy to break, and has good cushioning performance.
3. EPS, which can be molded out, can be pre-expanded into particles, and then formed into various shapes in the mold. It has not good toughness, is easy to break, and has cushioning performance in general.
Second, the composition is different
1. EPS is a type of polystyrene, which is a thermoplastic material. It is often seen in our lives. For example, the kind of "white foam plastic" used to prevent shocks in the boxes we usually use when buying home appliances. "It's EPS. The price is cheaper.
2. EPE is a hair-type polyethylene, which is a new type of environmentally friendly material, which is the pearl cotton we usually talk about. EPE is a low-density polyethylene grease that undergoes a physical foaming process to produce a non-crosslinked closed-cell structure. EPE can be recycled, and a certain amount of EPE recycled material (70%) is allowed to be mixed in manufacturing, so it is better for the environment, and it is also conducive to reducing manufacturing costs.
3. EPP is expandable polypropylene, which is a highly crystalline polymer material with excellent properties. Due to the limitation of this material cost factor, the price is relatively expensive.
Other informations:
Styrofoam EPS is mainly used in the packaging of household appliances and industrial products.
Polyethylene foam plastic EPE is mainly used in the fields of high-end furniture, household appliances, instruments and meters, craft gifts, wood products, glass ceramics, building waterproofing, carpet interlayer, sound insulation, travel luggage, precision parts, and various pipe insulation.
Polyurethane foam EPU is mainly used in the building decoration industry and buffer packaging of molded products.
