In the last chapter, we learned about the prohibition of foam use in some regions for the reason of no better way to dispose but to throw away, which led to environmental pollution and waste of resources. This might not be universally known that foam is a multipurpose material and what we can do with it is stunning. We can make it look like marble, quartz, wood and only different in weight. Next is a clear demonstration of how foam recycling works in construction field to replace wood.
The History of Construction Materials
What should be known first is the market demand of "replacing wood with plastic foam". As the building material with the longest time and the highest utilization rate, building wooden formwork has appeared in the 1950s. In the 1980s, the emergence of building steel began to propose "replacing wood with steel", and in the 1990s, the emergence of bamboo plywood began to propose "replacing wood with bamboo". By 2000, the emergence of wood plywood made it more difficult to ban wood. Although there are some differences between solid wood material and wood plywood, their essence is still solid wood material. It was not until the emergence of plastic foam materials that the concept of "plastic foam instead of wood" was put forward and made wooden formwork replaced into a new trend.
Why Need to Replace Wood with Plastic Foam
The reason for looking for alternative materials is that the large use of wood is a great waste of forest resources. Although the price of wood is cheap, its turnover rate is low, which increases not only the cost of construction site, but also the waste of forest resources.
Especially in the current construction market, the building height is mostly more than 20 floors. Even if the best wood plywood is used on the market, at least two or three sets of wood plywood should be purchased. Although the investment at one time is lower than the new building formwork, it actually increases total cost added.
On the other hand, the social development also makes people have higher requirements for the flatness of the wall. The wood formwork can be seen in the past at the beginning of several layers of the wall. Once the number of uses becomes more, the smoothness of the wall can not be guaranteed at all, while the plastic foam can achieve a very smooth effect.
How does Foam Recycling Contributes
The waste plastic foam is garbage when placed in landfill, however, when put into the line of new products, it can be valuable resource. People now realize the need of foam recycling, but how to recycle efficiently and how to make the most favorable use still need to be popularized.
The recommended solution is: collect the waste foam centrally, reduce the foam volume through the foam densifier, and the compressed foam blocks/ingots with high-density make the next foam granulation easier and more efficient. With foam granulation equipment, foam pellets can be produced and widely used. Then these foam pellets are fused and processed in different proportions to make new materials which look like wood, but have no changes in performance.
It has become an irreversible trend that building wood is replaced by new materials and “Replacing wood with plastic foam” is no longer just talking. In Europe, America, Japan, South Korea and some other countries with relatively developed plastic industry, plastic foam building has been used in large-scale production for decades. While effectively saving forest resources, the significance of foam recycling is greater. It not only reduces the environmental pollution caused by foam as discarded garbage, but also improves the utilization rate of reusing.