Dongwha Medium Density Fibreboard (MDF)

Dongwha Medium Density Fibreboard (MDF)

Physical & Mechanical Properties of Fibreboard>  http://www.dongwha.com/myen/product/product1_01.asp

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Mechanical
Properties
Test
Method
Unit ≥ 2.5 –
4.0
> 4.0 –
6.0
> 6.0 –
9.0
> 9.0 –
12.0
> 12.0 –
19.0
> 19.0 –
30.0
Thickness tolerance BS EN
324-1
mm ±0.2
Size tolerance
(length & width)
BS EN
324-1
mm a) within 5mm (length) & within 2mm (width) for free trim panel
b) +2 mm (width) and + 5mm (length) for nett size panel
Squareness BS EN
324-2
mm/m <1.5
Squareness
(diagonal)
BS EN
324-2
mm < 5
Average density BS EN
323
kg/㎥ 800-860 780-840 760-800 720-760 700-740 650-690
Board moisture BS EN
322
% 5-8
Modulus of Rupture BS EN
310
N/㎟
Ave
23 23 23 22 20 18
Modulus of elasticity
in bending
BS EN
310
N/㎟
Ave
NA 2700 2700 2500 2200 2100
Internal bond (dry) BS EN
319
N/㎟
Ave
0.65 0.65 0.65 0.60 0.55 0.55
Screw holding Face BS EN
320
N/㎟
Ave
NA NA NA NA 1050 1000
Screw holding Edge BS EN
320
N
Ave
NA NA NA NA 850 700
Thickness swelling
(24hr)
BS EN
317
%
Max
35 30 17 15 12 10

<Formaldehyde Emission of Fibreboard>

detail view
Properties Test Method /
Unit
Classification MDF MDF
LF
MDF
LG
MDF
MR
MFB
Perforator Method BS EN 120
mg/100g
E1≤9.0
E2>9.0≤30
E3>30
Desiccators Method JIS A 1460
mg/L
F****
Ave ≤ 0.3 Max ≤0.4
F***(E0)
Ave ≤ 0.5 Max ≤0.7
F**
Ave ≤1.5. Max ≤2.1
F* >2.1
CARB
(Small Chamber
Method)
ASTM D 6007
ppm
Phase 2 MDF Thin Board
< 8mm < 0.13
Phase 2 MDF Thick Board
> 8.1mm < 0.11

NOTES :The perforator values in this table apply to panels with moisture contents of 6.5%

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