2023-01-11 16:56:34
2022-09-06 10:34:35
2022-09-06 10:30:49
2023-02-15 10:13:32
QUALITY CONTROL STANDARD-HIGH DENSITY FIBERBOARD
SCOPE
This standard specifies the definition, category, requirements,testing manners,rules of inspection, marks, package, transportation and storage of high density fiberboard.
This standard is applicable to high density fiberboard of dry production.
TECHNICAL REQUIREMENTS
Size and Deviation
Item |
Nominal thickness t/mm |
|||
t<8 |
8≤t≤12 |
t>12 |
||
Difference of thickness |
not sanded |
-0.3~+1.5mm |
-0.3~+1.5mm |
-0.3~+1.7mm |
sanded |
±0.2mm |
±0.3mm |
±0.3mm |
|
Length and width |
±2.0mm/m,the maximum value ± 5mm |
|||
Perpendicularity |
<2.0 mm/m |
|||
The width of all measurement points on every sanded board shall fall within the range of its arithmetic average value ±0.15mm. |
The Appearance & Quality Requirements
Name |
Quality Requirements |
Allowable range |
|
Superior |
Qualified |
||
Layering、blistering or carbonization |
— |
Not allowed |
|
Partial softness |
2000mm2 the area on one board shall ≤2000 mm2 |
Not allowed |
3 parts |
Losses on edges |
the width ≤10mm |
Not allowed |
2 parts |
Grease、stains or foreign matters |
40mm2 the area on one board shall ≤40 mm2 |
Not allowed |
1 part |
Press marks、sanding imprint |
— |
Not allowed |
Allowed |
There shall be no more than 2 kinds of appearance defects on the same flooring board. |
Physical and Chemical Performance Requirements
Density, density difference inside the board and moisture content
Item |
Nominal thickness t/mm |
||
t<8 |
8≤t≤12 |
t>12 |
|
Density |
>0.80 g/cm3 |
||
Density difference inside the board |
±10.0 % |
||
Moisture content |
3.0~13.0 % |
Performance of general purpose high density fiberboard
Performance |
Thickness Range/mm |
|||||
≥1.5~3.5 |
>3.5~6 |
>6~9 |
>9~13 |
>13~22 |
||
MOR(Modulus of Rupture) |
38.0 MPa |
37.0MPa |
36.0MPa |
35.0MPa |
35.0MPa |
|
MOE(Modulus of Elasticity) |
3900MPa |
3800MPa |
3600MPa |
3500MPa |
3200MPa |
|
IB(internal bond strength) |
1.2MPa |
1.2MPa |
1.2MPa |
1.0MPa |
1.0MPa |
|
SS(surface soundness) |
0.8MPa |
0.9MPa |
1.0MPa |
1.2MPa |
1.2MPa |
|
Expansion rate of thickness after water absorption |
16.0% |
14.0% |
12.0% |
10.0% |
6.0% |
|
Anti-dampness performance |
Option 1: IB(internal bond strength)after circulation test |
0.40MPa |
0.40MPa |
0.40MPa |
0.35MPa |
0.35MPa |
Expansion rate of thickness after water absorption after circulation test |
18.0% |
16.0% |
14.0% |
11.0% |
11.0% |
|
Option 2: IB(internal bond strength)after boiling water test |
0.40MPa |
0.40MPa |
0.40MPa |
0.30MPa |
0.30MPa |
|
Option 3: Wet MOR(Modulus of Rupture) after dipping in 70℃environment |
15.0MPa |
15.0MPa |
15.0MPa |
15.0MPa |
13.0MPa |
Performance of high-humid high density fiberboard(HDF-GP HMR)
Item |
Thickness Range/mm |
||||
≥3.5~6 |
>6~9 |
>9~13 |
>13~22 |
||
MOR(Modulus of Rupture) |
42.0MPa |
42.0MPa |
40.0MPa |
38.0MPa |
|
MOE(Modulus of Elasticity) |
3800MPa |
3600MPa |
3500MPa |
3200MPa |
|
IB(internal bond strength) |
1.2MPa |
1.2MPa |
1.0MPa |
1.0MPa |
|
SS(surface soundness) |
0.9MPa |
1.0MPa |
1.2MPa |
1.5MPa |
|
Expansion rate of thickness after water absorption |
12.0% |
10.0% |
8.0% |
5.0% |
|
Anti-dampness performance |
Option1: IB(internal bond strength)after circulation test
|
0.5MPa |
0.5MPa |
0.45MPa |
0.45MPa |
Expansion rate of thickness after water absorption after circulation test |
14.0% |
12.0% |
10.0% |
9.0% |
|
Option 2: IB(internal bond strength)after boiling water test |
0.50MPa |
0.50MPa |
0.40MPa |
0.40MPa |
|
Option 3: Wet MOR(Modulus of Rupture) after dipping in 70℃environment |
20.0MPa |
20.0MPa |
20.0MPa |
18.0MPa |
Package、Transportation and Storage
Package
The products shall be packed based on their categories and specifications. On each package, the product name,category,grade,factory name, factory address, brand, specification & dimensions, quantity, standard code of product and inspection labels with formaldehyde emission limit marks
Transportation and Storage
Products shall be placed carefully on the flat ground during transportation, and shall be kept safe from dampness, rain, exposure to strong sunlight and distortions.