EPS recycling introduction:
Polystyrene foam (EPS) has an excellent long-lasting thermal insulation, unique cushioning shock resistance, aging resistance and water resistance, so styrofoam has been widely used in the construction, packaging, electrical and electronic products, ships, vehicles and aircraft manufacturing, decoration materials , housing construction and other fields, provided a great convenience to our lives.
But more than 50% of electrical and electronic damping packaging, fish boxes and other fresh produce packaging, they are abandoned after one-time use, because EPS has resistant bacteria resistance, weather resistance, corrosion resistance, it is very difficult to degrade completely under aerobic state 300 years, a lot of waste foam scattered in the natural environment, became white pollution affected the living environment.
Incineration heat recycling
The method is to burn waste polystyrene plastic then recycled heat energy in a special incinerator, to replace part of the fuel. Polystyrene calorific value is up to 4600kJ / kg. Although it can get energy combustion but it requires the use of special combustion furnace, or else polystyrene inadequately combustion will produce styrene, dioxins and other harmful substances, caused secondary pollution for environment. The incineration recycling cost is high, and the value of materials has not been fully utilized.
EPS melting, extrusion and granulation
Since the investment of polystyrene foam recycling machine is less with melt extrusion method, and the recycling process is simple, recycled PS pellets can maintain better performance at a reasonable process, the products is variety, the application of melt extrusion method is more current.
With the emerging of new recycling extrusion unit and new recycling technology, the quality of recycling polystyrene products continuously improved with melt extrusion method. The larger enterprises such as GREENMAX increased R & D investment in recent years, the recovery levels reached the international advanced level.
Other recovery methods
In addition to the above recovery methods, waste polystyrene plastics can also be modified after the production of paints, coatings, adhesives, asphalt reinforcement, prepared dyeing wastewater treatment flocculant, after the production of brominated flame retardants brominated polystyrene, crushed and mixed concrete production methods such as thermal insulation materials for recycling.
Transport
EPS foam waste due to the large volume, high transportation costs, so that once the plastic recycling business was afraid to waste styrofoam recycling. The largest EPS recycling company, Shanghai INTCO company developed GreenMax foam recycling machine series to hot melt and compress waste foam, provided a better solution to waste PS foam bulky difficult to transport problems, after compressing or melting, the volume of waste EPS foam is reduced to 1/40 of the original, greatly reducing transport costs in the recycling process, so that made it possible to recycle Styrofoam in a wide range.