Polish version
Drukuj

Polymeric composites made from polycarbonate waste

The technology is bsed on most recent achievements in the area of chemical modification of thermoplastics, guaranteeing obtaining polymeric composites with excellent properties and a wide spectrum of technical application capabilities. A filler additive allows to obtain materials with diversified properties, e.g.: graphite additive allows to obtain sliding properties and increases wear resistance. Such a material is hence excellent to produce belt and chain conveyors used i.a. in food and packaging industry, for lining dock walls with special battens to protect ship boards from bouncing against quays and for runners in bowling alleys. Another example is addition of glass fiber, providing heat resistance and suitable stiffness and hence good damping of mechanical vibrations, dimensional and shape stability. Such composites can find their application in the automotive industry (motor housing, carburetor, filters, cable holders), in household appliances (housings of vacuum cleaners or fryers), they can be material for cog wheels, self-sealing rings, parts of rotary and metering pumps, valves, faucets, filtration plates and frames etc. Nanosilica added in very small quantities radically changes properties of a nanocomposite, improving among others its stiffness, mechanical strength and reducing flammability.


A brief description of the technology

The essence of the process is employment of the reactive extrusion process with simultaneous filling (with e.g. glass fiber, graphite or nanosilica). In a relatively small processing device, which is a co-rotating twin-screw extruder, occurs a process of chemical modification of compact disk waste (the process runs rapidly – within only several dozen seconds, whereas „traditional” polymerization used to obtain new kinds of polymeric materials takes usually over a dozen hours).


Advantages of the technology offered

The developed solution, based entirely on Polish technical thought, is at the highest technological level of a new, intensively developing area of reactive extrusion. Polymeric composites made of polycarbonate waste, including compact disks, depending on modifiers and fillers used, are equivalent and simultaneously cheap replacements of conventional engineering polymers. They belong to the group of products, which for many years will be used in leading industries, like: machine-building, automotive, electronic and electrical.


Equipment

A co-rotating twin-screw extruder.


Patents

Patent application No P-378 227 (2006) „Method to produce polymeric composites from polycarbonate waste”.


Market competitiveness

No composites with engineering polymers properties involving usage of waste compact disk are produced at present in Poland.


References

Awards received on prestigious international invention and innovation exhibitions: 2 gold medals (Budapest 2006, Brussels 2008), 3 silver medals (Moscow 2006, Nuremberg 2006, Warsaw 2007), 1 bronze medal (Geneva 2006), a distinction in the XIth edition of the competition „Polish Product of the Future” in the future technology category, a special prize funded by Gorodissky & Partners Company from Russia (Brussels 2008).


Information

Dr. Regina Jeziórska, D.Sc., Eng., prof. of ICRI

phone: + 48 22 568 24 91, fax: + 48 22 568 21 84