The Fifth Meeting of ACCSQ Wood Based PWG
Brunei Darussalam, 11-12 July 2007
3. Moisture content
- The dimension of test pieces - The minimum number of test pieces is 1 pieces
- The minimum number of test pieces is 4 pieces - 100 mm x 100 mm
- The dimension is not specified but the minimum weight of the test piece is 20 g
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4. The determination of density
- The dimension of test pieces the minimum number of test pieces is 1 piece
- the minimum number of test pieces is 6 pieces - 100 mm x 100 mm 1 piece sample for
- 50 mm x 50 mm both density and moisture content
- The thickness is measured at 25 mm from - The thickness is measured at a point of inter-
each corner 4 point section of the diagonals
- The length and width are measured at along - The length and width are measured at two lines,
two lines parallel to and at a distance of 25 mm parallel to the edges, along lines which pass
from the edges through the center of opposite edges
- The test pieces are conditioned before testing, at the humidity 65 ± 5 and temperature
20 ± 2°C
5. The thickness swelling
- The dimensions of test pieces
the minimum number of test pieces is 1 piece the minimum number of test pieces is 6 pieces
- 50 mm x 50 mm, to an accuracy of 0,05 mm - 50 mm x 50 mm, to an accuracy of 0,01 mm
- Test condition - water temperature Fibre board 20° C,
- water temperature 20 ± 1°C and pH 7 ± 1 Particle board 25°C
- The duration of immersion: - The duration of immersion depend on panel
types - 2 hours for LDF
- 24 hours for MDF,HDF and Particle board
6. Linear Expansion only apply for
fibreboard
- The dimensions of test pieces - 70 mm x 200 mm
- 300 ± 1 mm x 50 ± 1 mm
- Test methods - Based on water immersion
- Based on the changes of relative humidity
The Fifth Meeting of ACCSQ Wood Based PWG
Brunei Darussalam, 11-12 July 2007
- Test condition - Immerse in water at room temperature for 24
hours applied for fibreboard only
7. The determination of moisture
resistance Not available
Available
under cyclic test conditions 8.
The determination of surface soundness
Not available Available
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9. The determination of Modulus
Elasticity
in bending and of bending strength - The distance between supports
- 15 x thickness, with the minimum distance of -
≥ 20 x thickness 150 mm
- the length of test pieces - 15 x thickness + 50 mm
- ≥ 20 x thickness + 50 mm
10. Internal Bond the determination of
tensile strength perpendicular to the plane of the panel
- test block - test block made from metal
- test block could be made from metal, hardwood or hardwood plywood as long as they have
an air dry density 600 kg m3
11. The determination of wet bending
strength - without conditioning
- Conditioning of the test pieces before testing - cooling in water bath for 60 minutes
- Cooling in water bath for 75 ± 25 minutes
12. The determination of screw holding
ability
- The dimension of the test pieces - 50 mm x 100 mm
- 75 ± 1 mm square
The Fifth Meeting of ACCSQ Wood Based PWG
Brunei Darussalam, 11-12 July 2007
- The dimension of screw - Diameter = 2.7 mm
- for face withdrawal of screw , diameter = 2.9 mm,
Length = 16 mm the length = not arranged, and the threated pitch
the threated pitch = 11 mm 11 ± 0.5 mm
- for edge withdrawal of screw , diameter = 4.2 mm,
the length = not arranged, and the threated pitch 15 ± 0.5 mm
- types of the screw only apllied in face withdrawal
- applied for face and edge withdrawal the threated pitch 15 ± 0.5 mm
- Expression of result - Expressed in kgf cm2
- only measured the maximum load, expressed in Newton N
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13. Determination of Formaldehyde
