Domestic Eps Foam Recycling Methods
Recycling also called recycling technology, which is the most important measures for environmentally sound
. At present, many research institutes at home and abroad have a research for EPS recycling, and some have reached a practical extent, Here are several EPS recycling technology methods.
A mechanical recycling
This method can be divided into two kinds of simple regeneration and composite regeneration. Simple regeneration is mainly used for the production plant scrap, including easy to clean disposable waste recovered, its composition is relatively simple, clean, recycled materials may be used alone or blended to a certain percentage of use of the new compound, may also use processes and equipment, which is mainly used and effective methods.
1.Recycling production XPS
EPS waste by crushing pelletized prepared PS, then heated and melted to add foaming agents, flame retardants, nucleating agents and additives, the XPS obtained by the processing system, widely used for building materials. Currently, this recycling technology in the country has been the promotion of a large area, and become one of the main ways of EPS recycling.
2.Recycling
Foam manufacturers can scrap and substandard products through the crusher into a certain size particles, made of various sizes and shapes, with fresh pre-expanded beads mixed again forming sheet metal forming machine or packaging machine EPS products.
3.Hot melt regeneration
The hot melt regeneration can be divided into the following process. The kind of process is the waste EPS foam constant temperature baking at 140 C to 190 C, the shrinkage degassing pulverization, after cooling. Baking will produce flammable gases, and to take effective the exhaust measures, attention to production safety. Another process is broken, and then for the first scrap propeller foam nibs forces added to the extruder barrel after melt extrusion, bracing, cooling, diced into recycled pellets.
Manufacture the lightweight insulation materials
Scrap foam has been crushed, through infrared radiation heating, and its volume is reduced to 1/20 or less. Then mixed with a special cement, made of a marshmallow-like building materials, was identified as a nonflammable building materials. The construction material silencer effect is an average of 60%, for certain frequency noise suppression can be achieved more than 90%, which is now being used as soundproofing walls and ceilings.
In addition, EPS broken material can also be made of lightweight block, interior and exterior insulation mortar and light mortar etc. Adhesive soil and EPS broken material can also be mixed according to a certain ratio side, after high temperature baking, EPS broken material and thus burning clay brick made of a hollow structure, this brick has high strength and excellent thermal insulation properties.
Chemical recycling
The method is make the waste EPS broken down into monomer compounds, fuel and other reusable elements, and EPS recycling truly become a closed-loop process so that achieve recycling and real governance EPS pollution of the environment.
Other recycling technology
1 Manufactured rust paint
2. the manufacture of multi-functional resin
3. Manufacturing impermeable trap agent
4. As an asphalt enhancer
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by: vera_liu
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