Description of EPS
Expanded Polystyrene (EPS), is a perfect termoplastic isolation material gained due to expanding gas and polymerization of styrene. In the numerous microscopic closed pores (in 1 m²  EPS-3-6 billion pores holds a plenty of stationary air. As is known that stationary air is one of the best heat-insulation materials, quality EPS is provided by this feature. In a kind of that the material consists 98 % of air, it is easy and not deals additional weight to a building. Having given the necessary form it is possible to use both in heat insulation and in the packing industry.
General Proporties of EPS
• Majority of EPS features vary depending on its density. As an heat insulation material ıt is produced with a density of 15-30 kg/m³
• It is the most economic insulation material.
• Is not fragile as a heat insulation material and also elastic.
• Provides fine heat insulation and this property grows directly proportionally to density.
• Up to the standards of DIN 4102 belongs to B1 class – “hardly burning materials”.
• Low vapour permeability makes it the most suitable material for application on buildings. Vapour diffusion coefficient may vary between 20-100 depending on density.
• Resistive to mechanical pressure (this property either grows proportionally to density).
• Due to closed pores almost does not wet.
• Does not change its thickness with the time.
• Environment friendly. Does not contain such substances as CFC, HCFC ve HFC harmful to ozone layer. Fully rescyclable material.
• Durable continues to fulfil its function while the building stands.
• Light. Easy to carry and to apply.
Some Explanations About EPS

Heat resistivity
- As in all other materials oh this kind its resistivity towards exerted heat changes depending on duration of exertion, and the temperature.
- If maximum temperature can be endured for a short period of time is 100ºC, when in long period of exertion it decreases to 75-80. Due to this reason EPS is a fine heat insulation material for cold regions.

Pressure resistivity
- Also changes due to the duration of exertion.
- Pressure resistivity grows proportionally to the density. High density increases its durability against stretching, bending or other harmful effects.

Moisture absorption
- Moisture absprption rate differs depending on are the pores closed or not.
- Moisture absorption of EPS if the contact with moisture takes place on the surface with closed pores is very low.
- Due to low moisture absorption rate and that Styrene which is main material for EPS is no dissolved in water EPS does not cease its qualities in wet environment.



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