EPS foam recycling |
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Date of publication:2014/10/23 ] |
At present, many domestic and foreign scientific research units ofthe EPS recycling research, some of them have reached the practical level, the following pairs have reached the practical level of EPS recovery of several technical methods to be described separately.
1, mechanical recycling
This method can be divided into simple and complex regeneration of two kinds of regeneration, simple and mainly recycled scrap materials used to produce plants, but also easy to clean one-time use of recycled waste, its composition is relatively simple, clean,renewable materials, individually or in blending a certain percentage of the use of a new compound, but also can use the existing technology and equipment, which is the main use and proven methods.
2, recovery of production XPS
EPS waste created by the crushed material, the obtained PS, and then melt by adding foaming agent, flame retardants, nucleating agent additive, obtained by the processing of XPS, is widely used in building materials. Currently, the recycling technology in China has been large-scale promotion, EPS, and has become one of the main ways of recycling.
3 recycling
Foam manufacturers and substandard products may be bits and pieces through the crusher into a certain size of particles, with fresh pre-made beads mixed in the sheet metal forming machine or packaging machine again in shape, made of various sizes and shapes of the EPS products. After production practice proved that the product performance to meet the national standard GBl0801-2002 under the premise of the ash particles can be broken 10% ~25%, and that is, you can save raw materials, 10% ~ 25%.
4, hot-melt regeneration
There is also a waste EPS foam process is first immersed into the mixture of high boiling point solvents, antifoaming make it and become a gel material, and then with the modified resin, additives mixed by the multi-stage exhaust extrusion granulator, while condensing solvent recovery. To enhance the granulation product obtained polystyrene, can be made stationery, toys and a variety of daily necessities and electrical and electronic components. Using gel-based method of pellets made by air-dry to the solvent content of up to 6% ~ l0%, they could still re-used to make polystyrene foam plastic products.
In addition, EPS can also be made of lightweight material crushing block, interior and exterior insulation mortar and light mortar. Adhesive can also be broken soil and EPS more than expected according to a certain side of mixing baking at a high temperature burn, EPS expected to be broken and thus burning a hollow structure made of clay brick, this brick has a high strength and excellent insulation properties.
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