ISO 4586-8:2018

INTERNATIONAL ISO
STANDARD 4586-8
Second edition
2018-07
High-pressure decorative laminates
(HPL, HPDL) — Sheets based on
thermosetting resins (usually called
laminates) —
Part 8:
Classification and specifications for
alternative core laminates
Stratifiés décoratifs haute pression (HPL, HPDL) — Plaques à base de
résines thermodurcissables (communément appelées stratifiés) —
Partie 8: Classification et spécifications des différents modes de
base laminés
Reference number
ISO 4586-8:2018(E)
©
ISO 2018

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ISO 4586-8:2018(E)

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© ISO 2018
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Published in Switzerland
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ISO 4586-8:2018(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material types . 2
5 Requirements . 3
5.1 Compliance . 3
5.2 Inspection requirements .3
5.2.1 General. 3
5.2.2 Colour, pattern and surface finish .3
5.2.3 Surface finish . .3
5.2.4 Reverse side .3
5.2.5 Visual inspection .4
5.3 Dimensional tolerance requirements .4
5.3.1 Dimensional tolerance requirements for coloured core laminates .4
5.3.2 Dimensional tolerance requirements for metal reinforced core laminates .5
5.4 Test requirements .6
5.4.1 General requirements for coloured core laminates .6
5.4.2 General requirements for metal reinforced core laminates . 10
5.4.3 Reaction to fire . 15
Annex A (informative) Addendum to 5.4.3, relating to fire performance .16
Bibliography .18
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ISO 4586-8:2018(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11,
Products.
This second edition cancels and replaces the first edition (ISO 4586-8:2015), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— correction of errors due to typographical, formatting, and omission issues.
A list of all parts in the ISO 4586 series can be found on the ISO website.
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ISO 4586-8:2018(E)

Introduction
High-pressure decorative laminates are characterized by their qualities, durability, and functional
performance. HPL sheets are available in a wide variety of colours, patterns, and surface finishes. They
are resistant to wear, scratching, impact, moisture, heat, and staining; and possess good hygienic and
anti-static properties, being easy to clean and maintain.
In an effort to harmonize ISO 4586 with other high-pressure decorative laminate standards,
multiple methods may be published that demonstrate similar properties. In these instances, the
same test method title is given and is annotated as either “Method A” or “Method B”. This is the case
in the following tests: Edge squareness — 8/9, Dry heat — 17/18 Dimensional stability at elevated
temperatures — 19/20, Dimensional stability at ambient temperature — 21/22, Staining — 30/31,
Lightfastness — 32/33, Formability — 38/39, and Blistering — 40/41. In these instances, either
method may be utilized in testing. Compliance to both methods is not required. While these tests are
similar they are by no means identical and results of one method do not necessarily correspond to the
results of the accompanying test. In these situations, it is intended that the documentation in specific
parts of ISO 4586 for performance requirements be consulted. Each specific method has performance
requirements particular to that method for individual grades of high-pressure decorative laminate.
This document has been harmonized with EN 438-9 whenever possible.
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INTERNATIONAL STANDARD ISO 4586-8:2018(E)
High-pressure decorative laminates (HPL, HPDL) —
Sheets based on thermosetting resins (usually called
laminates) —
Part 8:
Classification and specifications for alternative core
laminates
1 Scope
This document specifies performance requirements for high-pressure decorative laminates (HPL,
HPDL) intended for interior use that have core compositions not covered by ISO 4586-1 through
ISO 4586-7. The core composition types (coloured core and metal reinforced core) are defined in this
document.
ISO 4586-2 specifies the methods of test relevant to this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 178, Plastics — Determination of flexural properties
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 1183-1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion
method, liquid pyknometer method and titration method
ISO 4586-2:2018, High-pressure decorative laminates (HPL, HPDL) — Sheets based on thermosetting resins
(usually called laminates) — Part 2: Determination of properties
ISO 12572, Hygrothermal performance of building materials and products — Determination of water
vapour transmission properties — Cup method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
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ISO 4586-8:2018(E)

3.1
high-pressure decorative laminate
HPL
HPDL
sheet consisting of layers of cellulosic fibrous material (normally paper) impregnated with
thermosetting resins and bonded together by the high-pressure process (3.2)
Note 1 to entry: This is a general definition of high-pressure decorative laminate(s). More specific product
definitions can be found in ISO 4586-3 to ISO 4586-8.
Note 2 to entry: The back of the sheet(s) is made suitable for adhesive bonding to a substrate.
3.2
high-pressure process
simultaneous application of heat (temperature ≥ 120 °C) and high specific pressure (≥ 5 MPa), to
provide flowing and subsequent curing of the thermosetting resins to obtain a homogeneous non-
3
porous material with increased density (≥ 1,35 g/cm ), and with the required surface finish
3.3
alternative core laminate
high-pressure decorative laminate (3.1), consisting of decorative surface layers and alternative core layers
Note 1 to entry: The decorative surface layer(s) impregnated with melamine resin may appear on one or both
sides of the laminate.
3.4
colored core laminate
high-pressure decorative alternative core laminate (3.3), the core material of which consists of cellulosic
fibrous layers (normally paper), impregnated with thermosetting resins (typically aminoplastic
thermosetting resins)
Note 1 to entry: To achieve a coloured core laminate, either the cellulosic fibres or the resins can be coloured. A
translucent laminate can be achieved by using clear resins and bleached fibres.
Note 2 to entry: The surface and the core layers can have a similar colour producing a uniformly coloured
laminate or be different colour to achieve a succession of coloured layers.
3.5
metal reinforced core laminate
high-pressure decorative alternative core laminate (3.3), the core material of which consists of metal
layer(s) or mesh(es) and cellulosic fibrous layers (normally paper) impregnated with phenolic or
aminoplastic thermosetting resins
Note 1 to entry: The purpose of including metal layers is to improve the mechanical, fire, or permeability
performance of the laminate. Additionally the metal layers can give aesthetic improvements to the edge.
4 Material types
High pressure decorative alternative core laminates are defined using a three letter classification
system as shown in Table 1.
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ISO 4586-8:2018(E)

Table 1 — Numerical classification
First letter Second letter Third letter
B (Coloured core laminate) C (Compact) S (Standard grade)
H (Metal reinforced core laminate) T (Thin laminate, < 2 mm) F (Flame-retardant grade)
Type S — Standard grade high pressure decorative alternative core laminates.
Type F — High pressure decorative alternative core laminates with improved fire retardance; similar to type S but also
complying special requirements of specified fire tests which may vary according to the application (e.g. construction,
marine, transport) and the country of use (see 5.4.3).
In addition to the abbreviation “HPL” or “HPDL” and the number of this document, materials shall be specified by the
alphabetical classification system.
NOTE  As an example, coloured core standard grade thin high-pressure decorative laminate is designated as HPL/
ISO 4586-8 BTS or HPDL/ISO 4586-8 BTS.
5 Requirements
5.1 Compliance
High-pressure decorative design laminates classified in Table 1 shall comply with all the appropriate
requirements specified in 5.2, 5.3, and 5.4. This applies to both full-size sheets and cut-to-size panels.
5.2 Inspection requirements
5.2.1 General
Inspection shall be carried out in accordance with ISO 4586-2:2018, Clause 4, at a distance of 0,75 m
to 1,5 m.
5.2.2 Colour, pattern and surface finish
When inspected in daylight or D65 standard illuminant and under tungsten-filament lighting illuminant
A, a slight difference between the corresponding colour reference sample held by the supplier and the
specimen under test is acceptable.
As colour and surface finish are critical, it is recommended that the sheets are checked for colour and
surface finish compatibility without protective film before fabrication or installation.
5.2.3 Surface finish
When inspected at different viewing angles, there shall be no significant difference between the
corresponding surface finish reference sample held by the supplier and the specimen under test is
acceptable.
As colour and surface finish are critical, it is recommended that the sheets are checked for colour and
surface finish compatibility without protective film before fabrication or installation.
5.2.4 Reverse side
The reverse side of single-sided sheets shall be suitable for adhesive bonding (e.g. sanded). In the case
of sanded backs, slight chatter marks shall be permitted.
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ISO 4586-8:2018(E)

5.2.5 Visual inspection
5.2.5.1 General
The following inspection requirements are intended as a general guide, indicating the minimum
acceptable quality for laminates. Cut-to-size panels and certain applications involving full-size sheets
may call for special quality requirements which can be negotiated between the supplier and purchaser,
in such cases the following requirements may be used as a basis for agreement. Only a small percentage
of sheets in a batch (the level to be agreed upon between the supplier and the customer) shall contain
defects of the minimum acceptable level.
In the case of a double faced laminate, it may be agreed between the purchaser and supplier that the
visual quality standard applies to one decorative face only.
5.2.5.2 Surface quality
The following defects are permissible:
— Dirt, spots dents, and similar surface defects.
The admissible size of such defects is based on a maximum contamination area equivalent to
2 2
1,0 mm /m of laminate and is proportional to the sheet size under inspection.
The total admissible area of contamination may be concentrated in one spot or dispersed over an
unlimited amount of smaller defects.
— Fibres, hairs, and scratches.
The admissible size of such defects is based on a maximum contamination area equivalent to
2 2
10 mm /m of laminate and is proportional to the sheet size under inspection.
The total admissible area of contamination may be concentrated in one spot or dispersed over an
unlimited amount of smaller defects.
5.2.5.3 Edge quality
Visual defects (e.g. moisture marks, lack of gloss, corner damage) can be present on all four edges of the
laminate, providing the defect-free length and width are at least the nominal size minus 20 mm.
For compact laminate grades, edge chipping up to 3 mm on each side is permissible.
5.3 Dimensional tolerance requirements
5.3.1 Dimensional tolerance requirements for coloured core laminates
Dimensional tolerance requirements for coloured core laminates are specified in Tables 2 and 3.
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ISO 4586-8:2018(E)

Table 2 — Dimensional tolerance requirements for thin coloured core laminates
Test method
Property Requirement
(ISO 4586-2:2018
Clause No.)
0,5 mm ≤ d ≤ 1,0 mm: ±0,15 mm maximum deviation
Thickness 5 1,0 mm < d ≤ 2,0 mm: ±0,18 mm maximum deviation
where d = nominal thickness
a
Length and width 6 +10 mm/−0 mm
a
Straightness of edges 7 1,5 mm/m maximum deviation
a
Squareness (Method A) 8 1,5 mm/m maximum deviation
a
Squareness (Method B) 9 < 6 mm
b
Flatness 10 100 mm/m maximum deviation
a
Tolerances for cut-to-size panels shall be agreed between supplier and purchaser.
b
Provided that the laminates are stored in the manner and conditions recommended by the manufacturer.
Table 3 — Dimensional tolerance requirements for compact coloured core laminates
Test method
Property Requirement
(ISO 4586-2:2018
Clause No.)
2,0 mm ≤ d < 3,0 mm: ±0,25 mm maximum deviation
3,0 mm ≤ d < 5,0 mm: ±0,40 mm maximum deviation
5,0 mm ≤ d < 8,0 mm: ±0,50 mm maximum deviation
8,0 m ≤ d < 12,0 mm: ±0,70 mm maximum deviation
12,0 mm ≤ d < 16,0 mm: ±0,80 mm maximum deviation
Thickness 5
16,0 mm ≤ d < 20,0 mm: ±0,90 mm maximum deviation
20,0 mm ≤ d < 25,0 mm: ±1,00 mm maximum deviation
25,0 mm ≤ d: to be agreed upon between the supplier and
customer
where d = nominal thickness
a
Length and width 6 +10 mm/−0 mm
a
Straightness of edges 7 1,5 mm/m maximum deviation
a
Squareness (Method A) 8 1,5 mm/m maximum deviation
a
Squareness (Method B) 9 < 6 mm
2,0 ≤ d < 6,0 mm: 12,0 mm/m maximum deviation
6,0 ≤ d < 10,0 mm: 8,0 mm/m maximum deviation
b
Flatness 10
10,0 ≤ d: 5, 0mm/m maximum deviation
where d = nominal thickness
a
Tolerances for cut-to-size panels shall be agreed between supplier and purchaser.
b
Provided that the laminates are stored in the manner and conditions recommended by the manufacturer.
5.3.2 Dimensional tolerance requirements for metal reinforced core laminates
Dimensional tolerance requirements for metal reinforced core laminates are specified in Table 4 and
Table 5.
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ISO 4586-8:2018(E)

Table 4 — Dimensional tolerance requirements for thin metal reinforced core laminates
Test method
Property Requirement
(ISO 4586-2:2018
Clause No.)
0,5 mm ≤ d < 2,0 mm: ±0,18 mm maximum deviation
Thickness 5
where d = nominal thickness
a
Length and width 6 +10 mm/−0 mm
a
Straightness of edges 7 1,5 mm/m maximum deviation
a
Squareness (Method A) 8 1,5 mm/m maximum deviation
a
Squareness (Method B) 9 < 6 mm
b
Flatness 10 100 mm/m maximum deviation
a
Tolerances for cut-to-size panels shall be agreed between supplier and purchaser.
b
Provided that the laminates are stored in the manner and conditions recommended by the manufacturer.
Table 5 — Dimensional tolerance requirements for compact metal reinforced core laminates
Test method
Property Requirement
(ISO 4586-2:2018,
Clause No.)
2,0 mm ≤ d < 3,0 m: ±0,25 mm maximum deviation
3,0 mm ≤ d < 5,0 mm: ±0,40 mm maximum deviation
5,0 mm ≤ d < 8,0 mm: ±0,50 mm maximum deviation
8,0 mm ≤ d < 12,0 mm: ±0,70 mm maximum deviation
12,0 mm ≤ d < 16,0 mm: ±0,80 mm maximum deviation
Thickness 5
16,0 mm ≤ d < 20,0 mm: ±0,90 mm maximum deviation
20,0 mm ≤ d < 25,0 mm: ±1,00 mm maximum deviation
25,0 mm ≤ d: to be agreed upon between the supplier and
cu
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