Prelaminated MDF Specification

Sl No.

Test

Unit

Pioneer MDF

Pre-laminated

Grade/Type

Exterior/ Grade I

Interior/ Grade II

PDHMR

1

Density

kg/m3

500-900

500-900

500-900

Variation from mean Density

%

±10

±10

±10

2

Moisture Content

%

5-10

5-10

5-10

Variation from mean moisture content

±3

±3

±3

3

Water absorption

a. After 2hr soaking

%

6.0

9.0

4-6

b. After 24hr soaking

12

18

-10

4

Thickness Swelling affter 24hrs soaking

%

4

7

2-4

5

Modulus of rupture

N/mm²

a. Up to 20 mm thickness

28

28

30

b. above 20 mm thickness

25

25

28

6

Modulus of elasticity

N/mm²

a. Up to 20 mm thickness

2800

2800

3000

b. above 20 mm thickness

2500

2500

2800

7

Internal Bond Dry

N/mm²

a. Up to 20 mm thickness

0.90

0.80

1.5

b. above 20 mm thickness

0.80

0.70

1.4

8

Internal Bond after AWR*

N/mm²

0.30

N/A**

0.3

9

Screw withdrawl strength

N

a.face

1500

1500

2000

b. Edge (> 12.0 mm)

1250

1250

2000

10

Screw withdrawl strength

Revolutions

a.Type-I

1000

1000

1000

b.Type-II

450

450

450

c.Type-III

250

250

250

d.Type-IV

75

75

75