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 Physical and Chemical  properties of expanded polystyrene foam

 

Property

Test method

Unit

 

Moulded density

DIN 53420

Kgm^3

15

20

25

30

35

40

Maximum permissible compressive

DIN 53421

Kpa

12-25

20-35

28-50

36-62

44-74

52-87

Stress at <2% compression

 

 

 

 

 

 

 

 

Compressive stress at

DIN 53421

Kpa

65-110

100-160

140-120

180-255

225-305

265-350

10% compressive (l)

 

 

 

 

 

 

 

 

Flexural strength (1)

DIN 53423

Kpa

160-210

240-300

325-400

410-490

490-590

580-680

Tensile strength (1)

DIN 18164

Kpa

150-230

225-325

260-415

375-510

450-600

530-700

Shear strength (1)

DIN 53427

Kpa

90-120

120-150

150-190

190-220

220-250

250-290

Average coefficient of linear

DIN 53752

K-1

0.06X10-4

0.06X10-4

0. 06X 10-4

0.06X10-4

0.6X10-4

0.6X10-4

Expansion between 20 and 80 C

 

 

 

 

 

 

 

 

Dimensional stability under heat,

based on

C

95

95

95

95

95

95

short term

DIN 53424

 

 

 

 

 

 

 

long term

based on

C

85

85

85

85

85

85

under 5 kPa load

DIN 18164

C

80-85

80-85

80-85

80-85

80-85

80-85

under 20 kPa load

 

-180-+85

-180-+85

-180_+85

-180_+85

-180_+85

-180-+85

-180_+85

in air

 

Win-lKA

0.032-0.036

0.031-0.036

0.0.0-0.034

0.029-0.033

0.029-0.033

0.029-0.033

Thermal conductivity with average

DIN 52612

 

 

 

 

 

 

 

specimen temperature of 10 C

 

 

 

 

 

 

 

 

Approximately water vapour

DIN 53429

gd-lm-2**

40

35

26

16

16

12

Permeability

 

 

 

 

 

 

 

 

Water vapour diffusion

DIN 4108

 

20-50

30-70

30-70

40-100

40-100

40-100

Resistance factors, (4)

 

 

 

 

 

 

 

 

Typical water absorption

DIN 53428

 

 

 

 

 

 

 

after immersion in water

 

 

 

 

 

 

 

 

for 7 days

 

Vol  %

3

2.3

2.2

2

1.9

1.8

for 1 year

 

Vol %

5

4

3.8

3.5

3.2

3

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