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Ourgreen High Compression Strength 700Kpa XPS Foam Board for High-speed Railway

Ourgreen 700Kpa XPS Foam Board for High-speed Railway

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 Ourgreen High Compression Strength 700Kpa XPS Foam Board for High-speed Railway

Ourgreen X700 Extruded Polystyrene Foam Board Description
Ourgreen High Compression X700 Extruded Polystyrene Foam Board is a thermal insulation board of extruded polystyrene, bearing a Compression Strength of 700Kpa, having a smooth surface to prevent the formation of thermal bridges.

Due to its Extra High Compression Strength and good Thermal Resistance, it is widely applied in China High Speed Railway Base . The XPS layer in such use prevent railway from damages caused by freeze thaw.

Blowing Agents of Ourgreen X700 Extruded Polystyrene Foam Board
The Blowing Agent of CO2 is added in the formulation in order to reach a Compression Strength of 700Kpa. The CO2 tends to make smaller pore size and make density as high as 50Kg/m3, which enables XPS to bear higher Compression Strength.

The existence of CO2 presents higher System Pressure requirement to the extruder. Due to boiling point of CO2 is as low as - 78.4 degree, the Extruding System Pressure must be kept around 25Mpa to maintain its liquid state, which means Mould can not be opened largely. This also determines that thickness greater than 50mm at 700Kpa is difficult to produce.

Technical Parameters of High Compression XPS Foam Board:

Item

Unit

Index

Standard

Apparent Density

Kg/M3

43 - 53

GB/T6343 - 1995

Thermal Conductivity

10℃           25℃

 

W/(m∙k)

≦ 0.035

≦ 0.038

GB/T 10294 - 2008

Shear Strength

Kpa

≧ 300

GB/T10007 - 2008

Compression Strength

Kpa

≧ 700

GB/T 8813 - 2008

Elasticity Modulus

Mpa

38 - 42

GB/T 8813 - 2008

Closed-cell Rate

%

≧ 95

GB/T10799 - 2008

Dimensional Stability

%

≦5

GB/T8811 - 2008

Fire Behaviour

 

C

GB 8624 - 2008





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