ISO 27769-1:2009

INTERNATIONAL ISO
STANDARD 27769-1
First edition
2009-08-01


Wood-based panels — Wet-process
fibreboard —
Part 1:
Classifications
Panneaux à base de bois — Panneau de fibres obtenu par procédé
humide —
Partie 1: Classifications





Reference number
ISO 27769-1:2009(E)
©
ISO 2009

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ISO 27769-1:2009(E)
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ii © ISO 2009 – All rights reserved

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ISO 27769-1:2009(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms. 2
3.1 Terms and definitions. 2
3.2 Symbols and abbreviated terms . 2
4 Classifications, designation and coding. 3
4.1 General. 3
4.2 Softboards . 3
4.3 Hardboards. 4
5 Mandatory tests relating to each grade. 4
5.1 General. 4
5.2 Softboards . 4
5.3 Hardboards. 5
5.4 Supplementary properties . 5
6 Thickness ranges. 6
6.1 Specification values . 6
6.2 Softboards . 6
6.3 Hardboards. 6
Bibliography . 7

© ISO 2009 – All rights reserved iii

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ISO 27769-1:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 27769-1 was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee SC 1,
Fibre boards.
ISO 27769 consists of the following parts, under the general title Wood-based panels — Wet-process
fibreboard:
⎯ Part 1: Classifications
⎯ Part 2: Requirements

iv © ISO 2009 – All rights reserved

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INTERNATIONAL STANDARD ISO 27769-1:2009(E)

Wood-based panels — Wet-process fibreboard —
Part 1:
Classifications
1 Scope
This part of ISO 27769 provides a classification matrix and related mandatory tests for two types of wet-
process fibreboard: softboards and hardboards.
NOTE 1 Wet-process fibreboards are divided into three types: softboards, medium boards and hardboards.
NOTE 2 This part of ISO 27769 is not applicable to medium boards.
NOTE 3 Fibreboards are broadly divided into two groups based on the manufacturing process, namely the dry-process
group and the wet-process group. This part of ISO 27769 is not applicable to dry-process fibreboards (see ISO 16895-1
and ISO 16895-2).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3340, Fibre building boards — Determination of sand content
ISO 9426, Wood-based panels — Determination of dimensions of panels
ISO 9427, Wood-based panels — Determination of density
ISO 16978, Wood-based panels — Determination of modulus of elasticity in bending and of bending strength
ISO 16979, Wood-based panels — Determination of moisture content
ISO 16981, Wood-based panels — Determination of surface soundness
ISO 16983, Wood-based panels — Determination of swelling in thickness after immersion in water
ISO 16984, Wood-based panels — Determination of tensile strength perpendicular to the plane of the panel
ISO 16985, Wood-based panels — Determination of dimensional changes associated with changes in relative
humidity
ISO 16998, Wood-based pa
...