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GB/T 4897.1-2003 English PDF (GBT4897.1-2003)

GB/T 4897.1-2003 English PDF (GBT4897.1-2003)

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GB/T 4897.1-2003: Particleboard -- Part 1: General requirements for all board types

This Part of GB/T 4897 specifies the definition, classification, statistical calculation and determination methods, measurement and test methods, inspection rules, marks, packaging, transportation and storage, signs, etc. of particleboard.
GB/T 4897.1-2003
GB
ICS 79.060.20
B 70
National Standard
of the PEOPLE Republic of China
Partially replacing GB/T 4897.1-1992
Particleboard - Part 1.
General requirements for all board types
ISSUED ON. JANUARY 27, 2003
IMPLEMENTED ON. MAY 1, 2003
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Classification ... 7
5 Technical requirements ... 8
6 Statistical calculation and determination methods ... 10
7 Measurement and test methods ... 11
8 Inspection rules ... 16
9 Marks, packaging, transportation, storage, and signs ... 19
Foreword
GB/T 4897 "Particleboard" is divided into seven parts.
?€? Part 1. General requirements for all board types;
?€? Part 2. Requirements for general purpose boards for use in dry conditions; ?€? Part 3. Requirements for boards for interior fitments (including furniture) for use in dry conditions;
?€? Part 4. Requirements for load-bearing boards for use in dry conditions; ?€? Part 5. Requirements for load-bearing boards for use in humid conditions; ?€? Part 6. Requirements for heavy-duty load-bearing boards for use in dry conditions;
?€? Part 7. Requirements for heavy-duty load-bearing boards for use in humid conditions.
This Part is part 1 of GB/T 4897 "Particleboard".
This Part is not equivalent to the European standard EN 312-1.1997 "Particleboard - Part 1. General requirements for all board types". Technical requirements (except for formaldehyde emission limit indicators) and marks adopt EN 312-1; and add items such as definition, classification, appearance quality, inspection rules. The Part replaces corresponding part of GB/T 4897-1992 "Particleboard". COMPARE GB/T 4897-2003 "Particleboard" with the previous version of the standard (GB/T 4897-1992), the important technical changes of the original standard are divided into seven parts, in which the requirements for load-bearing boards for use in humid conditions and requirements for heavy-duty load-bearing boards for use in humid conditions are newly added. This Part only specifies the common requirements for all types of particleboard.
This Part was proposed by the State Forestry Administration.
This Part shall be under the jurisdiction of the National Technical Committee on Wood-based Panels Standardization of China.
Responsible drafting organization of this Part. Research Institute of Wood Industry of China Academy of Forestry.
Participating drafting organizations of this Part. Beijing Timber Plant, and Hebei Cyber Panel Industry Group.
Main drafters of this Part. Chen Shiying, Long Ling, Zheng Fengshan, and Zhang Zhanhao.
This Part was first-issued in February 1985, and was first-revised in August 1992. This is the second revision.
National Technical Committee on Wood-based Panels Standardization of China is entrusted to be responsible for interpretation of this Part.
Particleboard - Part 1.
General requirements for all board types
1 Scope
This Part of GB/T 4897 specifies the definition, classification, statistical calculation and determination methods, measurement and test methods, inspection rules, marks, packaging, transportation and storage, signs, etc. of particleboard.
This Part applies to particleboard defined in 3.1.
This Part does not apply to oriented strand board (OSB).
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 2828-1987 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)
GB/T 17657-1999 Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels
3 Terms and definitions
The following terms and definitions apply to this Part of GB/T 4897.
3.1
Particleboard
Board made by hot pressing from wood debris (wood shavings, sawdust or similar materials) or non-timber plant debris (flax residues, bagasse, wheat straws, rice straws or similar materials) together with adhesives.
3.2
Particleboard for general purpose boards for use in dry conditions
Particleboard used in dry indoor, and non-load-bearing occasions, e.g. temporary exhibition panels, partitions, etc.
3.3
Particleboard for boards for interior fitments (including furniture) for use in dry conditions
Particleboard used in dry indoor, for furniture or interior fitments, and can not be used in water immersion or high humidity occasions. Particleboard usually has surface decoration process.
3.4
Particleboard for load-bearing boards for use in dry conditions
Particleboard for indoor construction that can still bear a certain load after affected by short-time water immersion or high humidity, such as environments like kitchen, bathroom, etc.
3.5
Particleboard for load-bearing boards for use in humid conditions
Particleboard for outdoor construction, with abilities of withstanding aging effects and water immersion under outdoor weather conditions, that can still bear a certain load. 3.6
Particleboard for heavy-duty load-bearing boards for use in dry conditions Particleboard for indoor construction that can still bear a great load after affected by short-time water immersion or high humidity, such as environments like kitchen, bathroom, etc.
3.7
Particleboard for heavy-duty load-bearing boards for use in humid conditions Particleboard for outdoor construction, with abilities of withstanding aging effects and water immersion under outdoor weather conditions, that can still bear a great load. 3.8
?€? Single-layer-structure particleboard;
?€? Three-layer-structure particleboard;
?€? Multi-layer-structure particleboard;
?€? Gradual-changing-structure particleboard.
4.6 Classification according to raw material used.
?€? Wood particleboard;
?€? Bagasse particleboard;
?€? Flax residue particleboard;
?€? Wheat straw particleboard;
?€? Bamboo particleboard;
?€? Others.
4.7 Classification according to purpose.
?€? General purpose boards for use in dry conditions;
?€? Boards for interior fitments (including furniture) for use in dry conditions; ?€? Load-bearing boards for use in dry conditions;
?€? Load-bearing boards for use in humid conditions;
?€? Heavy-duty load-bearing boards for use in dry conditions;
?€? Heavy-duty load-bearing boards for use in humid conditions.
5 Technical requirements
5.1 Thickness
Nominal thicknesses of particleboard are 4, 6, 8, 10, 12, 14, 16, 19, 22, 25, 30 mm, etc.
5.2 Format-width
Particleboard format dimension is 1220mm??2440mm.
NOTE. After agreed by both supplier and purchaser, it can produce particleboard of other format Su ?€? Standard specified value.
6.2.3 When inspecting multiple pieces of boards, each board shall comply with the specifications of 6.2.1 and 6.2.2. If not, it shall be re-inspected and determined according to 8.4.
6.2.4 Other unspecified property indicators are determined according to their arithmetic means.
7 Measurement and test methods
The followings are universal measurement and test methods for particleboard. 7.1 Specification and dimension measurement
7.1.1 Measuring tools
7.1.1.1 Micrometer, precision of 0.01mm.
7.1.1.2 Steel ruler, precision of 0.5mm.
7.1.1.3 Steel tape, precision of 1mm.
7.1.1.4 Thin wire.
7.1.2 Measurement of thickness dimension
In the middle of four sides and four corners of the board, measure 8 positions at 25mm away from the board edge by micrometer. And calculate the arithmetic mean, accurate to 0.01mm.
7.1.3 Measurement of length and width dimensions
MEASURE the length and width dimensions on any position at board?€?s width and length directions by steel tape, accurate to 1mm.
7.1.4 Measurement of difference between diagonals
MEASURE diagonal lengths of board by steel tape. And calculate the difference between two diagonals, accurate to 1 mm.
7.1.5 Measurement of warpage rate
PLACE the particleboard on a horizontal table with concave surface up. USE a thin wire to connect two diagonals of the board. USE steel ruler to measure the maximum chord height, accurate to 0.5mm. The ratio between the maximum chord length and the length of diagonal is warpage rate, expressed as a percentage, accurate to 0.1%. 7.2.2.2 Specimen cutting
CUT specimens on each sample according to specifications in Figure 3 and Table 4. At least one specimen from static bending strength, elastic modulus, internal bonding strength, surface bonding strength specimens is cut at the side of sample pavement direction. The minimum distance between two specimens of the same inspection items is ...

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