INTERNATIONAL ISO

STANDARD 16893-2

First edition
2010-11-01

Wood-based panels — Particleboard —

Part 2:
Requirements
Panneaux à base de bois — Panneaux de particules —
Partie 2: Exigences

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ISO 16893-2:2010
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6dce03f65163/iso-16893-2-2010

Reference number
ISO 16893-2:2010(E)

© ISO 2010
ISO 16893-2:2010(E)

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 ISO 16893-2:2010(E)

Contents Page

Foreword ............................................................................................................................................................iv
1 Scope ......................................................................................................................................................1
2 Normative references............................................................................................................................1
3 Terms, definitions and abbreviations..................................................................................................2
4 Expression of specification limits and general requirements ..........................................................2
4.1 Expression of specification limits .......................................................................................................2
4.2 Lower specification limits ....................................................................................................................3
4.3 Upper specification limits.....................................................................................................................3
4.4 Moisture resistance requirement options...........................................................................................3
4.5 Density variation, dimension and moisture content requirements..................................................4
4.6 Formaldehyde requirements ................................................................................................................4
4.7 Requirements for load bearing particleboard for use in dry conditions (P-LB REG) ....................4
5 Specific property requirements ...........................................................................................................5
5.1 Requirements for general purpose particleboard for use in dry conditions (P-GP REG) .............5
5.2 Requirements for furniture type particleboard for use in dry conditions (P-FN REG) ..................5
5.3 Requirements for heavy-duty load bearing particleboard for use in dry conditions
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(P-HLB REG) ..........................................................................................................................................6
5.4 Requirements for general purpose particleboard for use in humid conditions (P-GP MR) ..........6
5.5
(standards.iteh.ai)
Requirements for furniture type particleboard for use in humid conditions (P-FN MR) ...............7
5.6 Requirements for load bearing particleboard for use in humid conditions (P-LB MR) .................8
5.7 Requirements for heavy-duty load ISO 16893-2:2010
bearing particleboard for use in humid conditions
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
(P-HLB MR).............................................................................................................................................9
5.8 Requirements for general purpose particleboard for use in high humid conditions
6dce03f65163/iso-16893-2-2010
(P-GP HMR) ..........................................................................................................................................10
5.9 Requirements for furniture type particleboard for use in high humid conditions
(P-FN HMR)...........................................................................................................................................11
5.10 Requirements for load bearing particleboard for use in high humid conditions
(P-LB HMR)...........................................................................................................................................12
5.11 Requirements for heavy-duty load bearing particleboard for use in high humid conditions
(P-HLB HMR) ........................................................................................................................................13
6 Marking .................................................................................................................................................13
Annex A (normative) Calculation of 5-percentile and 95-percentile values ...............................................14

© ISO 2010 – All rights reserved iii

ISO 16893-2:2010(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 16893-2 was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee SC 2,
Particle boards.
iTeh STANDARD PREVIEW
ISO 16893 consists of the following parts, under the general title Wood-based panels — Particleboard:

⎯ Part 1: Classifications
(standards.iteh.ai)
ISO 16893-2:2010
⎯ Part 2: Requirements
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INTERNATIONAL STANDARD ISO 16893-2:2010(E)

Wood-based panels — Particleboard —

Part 2:
Requirements

1 Scope
This part of ISO 16893 provides the manufacturing property requirements for uncoated particleboard.

The values listed in this part of ISO 16893 relate to product properties used to classify particleboards into one
of four types, P-GP, P-FN, P-LB or P-HLB (see Clause 3), for use in three service conditions, REG, MR and
HMR. The values are not characteristic values to be used for design purposes.

2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
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references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
(standards.iteh.ai)
ISO 9426, Wood-based panels — Determination of dimensions of panels
ISO 16893-2:2010
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
ISO 9427, Wood-based panels — Determination of density
6dce03f65163/iso-16893-2-2010
ISO 12460-1, Wood-based panels — Determination of formaldehyde release — Part 1: Formaldehyde
emission by the 1-cubic-metre chamber method

ISO 12460-2, Wood-based panels — Determination of formaldehyde release — Part 2: Small-scale chamber
method

ISO 12460-3, Wood-based panels — Determination of formaldehyde release — Part 3: Gas analysis method

ISO 12460-4, Wood-based panels — Determination of formaldehyde release — Part 4: Desiccator method

ISO 12460-5, Wood-based panels — Determination of formaldehyde release — Part 5: Perforator method

ISO 16572, Timber structures — Wood-based panels — Test methods for structural properties

ISO 16893-1, Wood-based panels — Particleboard — Part 1: Classifications

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 2010 – All rights reserved 1

ISO 16893-2:2010(E)

ISO 16987, Wood-based panels — Determination of moisture resistance under cyclic test conditions

ISO 16998, Wood-based panels — Determination of moisture resistance — Boil test

ISO 17064, Wood-based panels — Fibreboard, particleboard and oriented strand board (OSB) — Vocabulary

ISO 20585, Wood-based panels — Determination of wet bending strength after immersion in water at 70 °C or
100 °C (boiling temperature)

3 Terms, definitions and abbreviations

For the purposes of this document, the terms and definitions given in ISO 17064 and ISO 16893-1 and the
following abbreviations apply.

EXT exterior

FN furniture

GP general purpose

HLB heavy-duty load bearing

HMR highly moisture resistant

LB load bearing iTeh STANDARD PREVIEW

MR moisture resistant (standards.iteh.ai)
REG regular ISO 16893-2:2010
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
UDF ultra-low-density fibreboard 6dce03f65163/iso-16893-2-2010

4 Expression of specification limits and general requirements

4.1 Expression of specification limits

This International Standard may be used to evaluate groups of panels or production batches. To evaluate a
group of panels, this requires that:

a) The mandatory tests of Table 2, ISO 16893-1, be applied to samples of the group. Conditioning of test
specimens is required as specified in each test method; and

b) The results of the tests be evaluated against the appropriate specification limits in Tables 1 to 14,
according to the product type and thickness range of the panels. Tables 1 and 2 apply to all product types
and thickness ranges of panels.

For density variation and dimensions (Table 1), specification limits are based on the mean values for
individual panels (calculated in accordance with Annex A) and are maximum tolerances. For formaldehyde
emission, Table 2 gives upper specification limits for individual panel results.

Specification limits in Tables 3 to 14 are based on 5 (lower) or 95 (upper) percentile expressions, according to
4.2 and 4.3.

Particleboard shall comply with the relevant requirements of this International Standard when despatched
from the producing factory.

2 © ISO 2010 – All rights reserved

 ISO 16893-2:2010(E)

4.2 Lower specification limits

The requirements in Tables 3 to 14 are the lower specification limits for the following properties:

a) bending strength (MOR);

b) modulus of elasticity (MOE);

c) internal bond strength;

d) surface soundness;

e) internal bond strength after cyclic test;

f) internal bond strength after boil test;

g) wet bending strength.

The 5-percentile values based on the mean values for individual panels and calculated in accordance with
Annex A, shall be equal to or greater than the lower specification limits in Tables 3 to 14.

4.3 Upper specification limits

The requirements in Tables 3 to 14 are the upper specification limits for the following properties:
iTeh STANDARD PREVIEW
a) thickness swell after 24 h; and

b)
(standards.iteh.ai)
thickness swell after cyclic test.

The 95-percentile values based on the mean ISO values

16893-2:2010
for individual panels and calculated in accordance with
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
Annex A shall be equal to or less than the upper specification limits in Tables 3 to 14.
6dce03f65163/iso-16893-2-2010
4.4 Moisture resistance requirement options

Requirements for moisture resistance are dependent upon the test method employed to assess this property.
Three alternative sets of requirements (Option 1, Option 2 and Option 3) are set out in Tables 7 to 14
corresponding to the three principal recognized methods of evaluation. It is necessary to show compliance
with only one of these three options, as follows:

⎯ Option 1: Requirements apply to those particleboards subjected to a cyclic accelerated ageing test,
followed by the determination of thickness swell and internal bond strength, as described in ISO 16987.

⎯ Option 2: Requirements apply to those particleboards subjected to an accelerated ageing test,

consisting of immersion in boiling water followed by determination of internal bond strength, as described
in ISO 16998.

⎯ Option 3: Requirements apply to those particleboards subjected to an accelerated ageing test

consisting of immersion in water at 70 °C followed by determination of the wet bending strength (MOR) as
described in Method A of ISO 20585.

© ISO 2010 – All rights reserved 3

ISO 16893-2:2010(E)

4.5 Density variation, dimension and moisture content requirements

At least 95 % of the mean values of the individual panels shall be within the maximum tolerances stated in
Table 1.

Table 1 — Requirements for density variation, dimensions and moisture content

Property Test method Requirement

Density variation within panel ISO 9427 ±10 % max from mean
Length and width ISO 9426 ±2 mm/m, max. ±5 mm
Squareness ISO 9426 < 2 mm/m
Thickness range (mm, nominal)
Thickness ISO 9426
u 12 > 12
−0,3 −0,5
— Unsanded board
+1,5 +1,7
— Sanded board ±0,3 ±0,3
Moisture content (advisory only) ISO 16979 5 to 13 %

4.6 Formaldehyde requirements

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Compliance with formaldehyde requirements may be confirmed by applying only one test method of those
(standards.iteh.ai)
listed in Table 2. The reference chamber method can take up to four weeks for each test to be completed. The
other tests are designated production control methods because one test may be completed within 24 h. Each
individual panel result shall comply with the specification limits stated in Table 2 for the selected method.
ISO 16893-2:2010
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
Table 2 — Maximum emission limits of formaldehyde for particleboard
6dce03f65163/iso-16893-2-2010
Test method and units
Production control methods
Reference chamber
method Small chamber
Gas analysis method Desiccator method Perforator method
method
ISO 12460-1 ISO 12460-2 ISO 12460-3 ISO 12460-4 ISO 12460-5
Emission Emission Emission Emission Content
mg/m3 ppm mg/m2/h mg/L mg/100 g
0,124 a 3,5 0,7 8

NOTE National regulations may impose restrictions on the use of boards of particular formaldehyde emission levels.
a If the small chamber method or any other method is used for production control, correlations should be established with the
reference chamber method to determine the emission value that is equivalent to the chamber method limit value stated in this table.
Correlations may be regional, national, company or plant specific as appropriate.

4.7 Requirements for load bearing particleboard for use in dry conditions (P-LB REG)

When particleboard is classified P-LB or P-HLB and nominated for load bearing applications, the characteristic
strength and stiffness values shall be established based upon testing in accordance with ISO 16572 or
equivalent ASTM or EN standards. Alternatively, for specific load bearing applications (e.g. walls, roofs, floors,
joist webs) the load bearing particleboard shall meet the specific performance requirements for that intended
application.

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 ISO 16893-2:2010(E)

5 Specific property requirements

5.1 Requirements for general purpose particleboard for use in dry conditions (P-GP REG)

The requirements for P-GP REG particleboard are listed in Table 3.

Table 3 — Requirements for P-GP REG particleboard

Requirement
Test Thickness ranges (mm, nominal)
Property Units
method
> 13 > 20 > 25
u6 > 6 to 13 > 34
to 20 to 25 to 34
Bending strength (MOR) ISO 16978 MPa 11,5 10,5 10,0 9,5 8,5 6,0
Internal bond strength ISO 16984 MPa 0,30 0,28 0,24 0,18 0,16 0,14

5.2 Requirements for furniture type particleboard for use in dry conditions (P-FN REG)

The requirements for P-FN REG particleboard are listed in Table 4.

Table 4 — Requirements for P-FN REG particleboard

iTeh STANDARD PREVIEW Requirement

Property
(standards.iteh.ai)
Test
Units Thickness ranges (mm, nominal)
method
> 13 > 20 > 25
u6
ISO 16893-2:2010 > 6 to 13 > 34
to 20 to 25 to 34
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
Bending strength (MOR) ISO 16978 MPa 12,0
6dce03f65163/iso-16893-2-2010 11,0 11,0 10,5 9,5 7,0
Modulus of elasticity (MOE) ISO 16978 MPa 1 900 1 800 1 600 1 500 1 350 1 050
Internal bond strength ISO 16984 MPa 0,45 0,40 0,35 0,30 0,25 0,20
Surface soundness ISO 16981 MPa 0,8 0,8 0,8 0,8 0,8 0,8

The requirements for P-LB REG particleboard are listed in Table 5.

Table 5 — Requirements for P-LB REG particleboard

Requirement
Test Thickness ranges (mm, nominal)
Property Units
method
> 13 > 20 > 25
u6 > 6 to 13 > 34
to 20 to 25 to 34
Bending strength (MOR) ISO 16978 MPa 15 15 15 13 11 8
Modulus of elasticity (MOE) ISO 16978 MPa 2 200 2 200 2 100 1 900 1 700 1 200
Internal bond strength ISO 16984 MPa 0,45 0,40 0,35 0,30 0,25 0,20
24 h thickness swell ISO 16983 % 22 19 16 16 16 15

© ISO 2010 – All rights reserved 5

ISO 16893-2:2010(E)

5.3 Requirements for heavy-duty load bearing particleboard for use in dry conditions
(P-HLB REG)

The requirements for P-HLB REG particleboard are listed in Table 6.

Table 6 — Requirements for P-HLB REG particleboard

Requirement
Test
Property Units Thickness ranges (mm, nominal)
method
> 6 to 13 > 13 to 20 > 20 to 25 > 25 to 34 > 34

Bending strength (MOR) ISO 16978 MPa 20 18 16 15 13

Modulus of elasticity (MOE) ISO 16978 MPa 3 100 2 900 2 550 2 400 2 100
Internal bond strength ISO 16984 MPa 0,60 0,50 0,40 0,35 0,25
24 h thickness swell ISO 16983 % 16 15 15 15 14

5.4 Requirements for general purpose particleboard for use in humid conditions (P-GP MR)

The requirements for P-GP MR particleboard are listed in Table 7.

Table 7 — Requirements for P-GP MR particleboard

iTeh STANDARD PREVIEW
Requirement
Test
(standards.iteh.ai)
Thickness ranges (mm, nominal)
Property Units
method
ISO 16893-2:2010 > 13 > 20 > 25
u6 > 6 to 13 > 34
to 20 to 25
https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68- to 34
6dce03f65163/iso-16893-2-2010
Bending strength (MOR) ISO 16978 MPa 13 13 12 11 10 7
Internal bond strength ISO 16984 MPa 0,30 0,28 0,24 0,20 0,17 0,14
24 h thickness swell ISO 16983 % 23 18 15 13 13 12
Moisture resistance
Option 1:
Internal bond strength after
cyclic test ISO 16987 MPa 0,14 0,13 0,11 0,08 0,07 0,06
Thickness swell after cyclic
test % 23 21 20 18 17 15
Option 2:
Internal bond strength after ISO 16998
boil test MPa 0,09 0,08 0,07 0,06 0,05 0,04
Option 3:
Wet bending strength after ISO 20585
immersion in water at 70 °C MPa 4,9 4,6 4,2 3,9 3,5 2,5

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 ISO 16893-2:2010(E)

5.5 Requirements for furniture type particleboard for use in humid conditions (P-FN MR)

The requirements for P-FN MR particleboard are listed in Table 8.

Table 8 — Requirements for P-FN MR particleboard

Requirement
Test Thickness ranges (mm, nominal)
Property Units
method
> 13 > 20 > 25
u6 > 6 to 13 > 34
to 20 to 25 to 34
Bending strength (MOR) ISO 16978 MPa 14 14 13 12 11 8
Modulus of elasticity (MOE) ISO 16978 MPa 1 900 1 900 1 900 1 700 1 400 1 200
Internal bond strength ISO 16984 MPa 0,45 0,45 0,40 0,35 0,30 0,25
Surface soundness ISO 16981 MPa 0,8 0,8 0,8 0,8 0,8 0,8
24 h thickness swell ISO 16983 % 20 16 14 13 13 12
Moisture resistance
Option 1:
Internal bond strength after
cyclic test ISO 16987 MPa 0,18 0,15 0,13 0,12 0,10 0,09
Thickness swell after cyclic
test iTeh STANDARD
% 20 PREVIEW
18 16 14 13 11
Option 2: (standards.iteh.ai)
Internal bond strength after ISO 16998
boil test MPa 0,09
ISO 16893-2:2010 0,09 0,08 0,07 0,07 0,06
Option 3: https://standards.iteh.ai/catalog/standards/sist/06de8c6b-8e3d-4740-bd68-
ISO 20585
6dce03f65163/iso-16893-2-2010
Wet bending strength after
immersion in water at 70 °C MPa 5,6 4,9 4,5 4,2 3,9 3,2

© ISO 2010 – All rights reserved 7