Main content and applicable scope

1.1  The standard herein (the "Standard") stipulates the quality requirements, testing methods, inspection rules, packaging and transportation requirements, etc. for fiberboard delivered at DCE.

1.2  The Standard applies to standard products and substitute products delivered under the fiberboard futures contract of DCE.

Cited rules and standards

The provisions of the following documents are incorporated as the provisions of the Standard by reference. For those cited documents noted with dates, all of their following amendments (excluding corrections) and revised versions shall not be applied to the Standard; for those without noted dates, their latest versions shall be applied to the Standard.

GB/T 11718-2009 Medium Density Fiberboard

GB 18580-2017 Limit of Formaldehyde Emission of Wood-based Panels and Relevant Products of Indoor Decorating and Refurbishing Materials

Terms and definitions

Subject to the terms and definitions in GB/T 11718-2009 and GB 18580-2017.

Quality requirements

4.1 Appearance quality

The surface shall be sanded and shall meet the following standards:

Name

Quality requirement

Laminationbubbling or charring

Not allowed

Flabbiness in some parts

Board edge defect

Oil stains or foreign matters

Impression

4.2  Size of surface and thickness

Item

Unit

Requirement

Length

mm

2440

Breadth

mm

1220

Thickness

mm

12, 15, 18

4.3  Size deviation, density and its deviation, and moisture level

Property

Unit

Nominal thickness

12mm

15mm, 18mm

Thickness deviation

mm

±0.20

±0.30

Length and breadth deviation

mm/m

±2.0

Verticality

mm/m

2.0

Density

g/cm3

0.65-0.80

Density deviation within  board

%

±10.0

Moisture level

%

3.0-13.0

The thickness of each measurement point within each sanded board shall not exceed ±0.15mm of their arithmetic mean value

4.4  Physical mechanics properties

Property

Unit

Nominal thickness

12mm

15mm, 18mm

Static bending strength

MPa

26.0

24.0

Elasticity modulus

MPa

2500

2300

Internal bonding strength

MPa

0.50

0.45

Thickness expansion rate after water absorption

%

15.0

12.0

Surface bonding strength

MPa

0.60

0.90

4.5  Amount of formaldehyde emission

The amount of formaldehyde emission shall be subject to GB 18580-2017.

5  Sampling, measurement, testing and determination work shall be subject to the requirements in GB/T 11718-2009 and GB18580-2017, while sampling of physicochemical properties shall be subject to the quality supervision standards of products that have passed quality check.

6  Marking, packaging, transportation and storage shall be subject to the standards in GB/T11718-2009.

7  Additional note

The Standard shall be subject to the interpretation of DCE.

Disclaimer: This English translation may be used for reference only. In cases there is any discrepancy between the English version and the original Chinese version, the original Chinese version shall prevail. Dalian Commodity Exchange may change or update this English translation without any prior notice and shall accept no responsibility or liability for damage or loss caused by any error, inaccuracy, misunderstanding, or change with regard to this English translation.

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