1. Manufacturing expandable polystyrene beads
1.1 Polymerization
The water-suspension polymerization process is employed for the polymerization of EPS. Monomeric styrene (C 8 H 8 ) (figure 1 ) is dispersed in fine droplets in water.
Radical polymerization initiators are essentially organic peroxides (benzoyl peroxide) which must be soluble in styrene monomer and insoluble in water. Droplet size can be adjusted by a number of parameters, such as the addition of a protective agent to stabilize the suspension, mixing conditions, reactor shape, and so on. A flame-retardant system may also be incorporated.
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Manufacturing expandable polystyrene beads
Production of EPS-M from expandable polystyrene
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Syndicat National des Plastiques Alvéolaires – SNPA [email protected]http://www.snpa.fr
...Economic data
The global EPS market totalled 3.75 million tonnes in 2004, of which 46% was used in packaging.
The breakdown of the insulation and packaging markets varies from one continent to another. These are entirely representative of building traditions (whether or not to insulate) and the importance of industries using EPS packaging. In Japan, for example, a leader in the electronics sector and the world's...
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