oSIST prEN 14323:2020
(Main)Wood-based panels - Melamine faced boards for interior uses - Test methods
Wood-based panels - Melamine faced boards for interior uses - Test methods
This document specifies test methods for the determination of characteristics of melamine faced boards (MFB) as defined in EN 14322.
Holzwerkstoffe - Melaminbeschichtete Platten zur Verwendung im Innenbereich - Prüfverfahren
Dieses Dokument legt Prüfverfahren zur Bestimmung der Eigenschaften von melaminbeschichteten Platten (MFB) fest, wie sie in EN 14322 definiert sind.
Panneaux à base de bois - Panneaux surfacés mélaminés pour usages intérieurs - Méthodes d'essais
Le présent document spécifie des méthodes d'essais pour la détermination des caractéristiques des panneaux surfacés mélaminés [PSM (MFB)] tels que définis dans l'EN 14322.
Lesne plošče - Z melaminom oplemenitene plošče za notranje prostore - Preskusne metode TC: Lesne plošče - Z melaminsko smolo impregniranim papirjem obložene plošče za notranje prostore - Preskusne metodeS
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 14323:2020
01-junij-2020
Lesne plošče - Z melaminom oplemenitene plošče za notranje prostore -
Preskusne metode
Wood-based panels - Melamine faced boards for interior uses - Test methods
Holzwerkstoffe - Melaminbeschichtete Platten zur Verwendung im Innenbereich -
Prüfverfahren
Panneaux à base de bois - Panneaux surfacés mélaminés pour usages intérieurs -
Méthodes d'essais
Ta slovenski standard je istoveten z: prEN 14323
ICS:
79.060.01 Lesne plošče na splošno Wood-based panels in
general
oSIST prEN 14323:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 14323:2020
DRAFT
EUROPEAN STANDARD
prEN 14323
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2020
ICS 79.060.20 Will supersede EN 14323:2017
English Version
Wood-based panels - Melamine faced boards for interior
uses - Test methods
Panneaux à base de bois - Panneaux surfacés Holzwerkstoffe - Melaminbeschichtete Platten zur
mélaminés pour usages intérieurs - Méthodes d'essais Verwendung im Innenbereich - Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 112.If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14323:2020 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
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Contents Page
European foreword ....................................................................................................................................................... 3
1 Normative references .................................................................................................................................... 4
2 Terms and definitions ................................................................................................................................... 4
3 Test pieces ......................................................................................................................................................... 4
4 Conditioning of test pieces ........................................................................................................................... 4
5 Test methods .................................................................................................................................................... 4
5.1 Dimensions (thickness, length and width) ............................................................................................ 4
5.2 Flatness ............................................................................................................................................................... 5
5.3 Edge damage ..................................................................................................................................................... 5
5.4 Surface defects ................................................................................................................................................. 6
5.5 Resistance to scratching ............................................................................................................................... 7
5.6 Resistance to staining .................................................................................................................................... 8
5.7 Resistance to cracking ................................................................................................................................... 9
5.8 Colour matching and surface texture.................................................................................................... 10
5.9 Resistance to abrasion of the decorative surface layer .................................................................. 13
5.10 Resistance to water vapour ...................................................................................................................... 13
5.11 Resistance to colour change in xenon arc light ................................................................................. 14
5.12 Gloss level ....................................................................................................................................................... 15
5.13 Resistance to impact by large-diameter steel ball ........................................................................... 16
6 Test report ...................................................................................................................................................... 16
Annex A (informative) Staining agents .............................................................................................................. 17
Bibliography ................................................................................................................................................................. 19
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prEN 14323:2020 (E)
European foreword
This document (prEN 14323:2020) has been prepared by Technical Committee CEN/TC 112 “Wood-
based panels”, the secretariat of which is held by DIN.This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14323:2017.
Compared to EN 14323:2017 the following modifications have been made:
a) spatially resolved spectral measurement technology added as an option in 5.8.2 to determine
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1 Scope
This document specifies test methods for the determination of characteristics of melamine faced boards
(MFB) as defined in EN 14322.2 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.
EN 324-1, Wood-based panels — Determination of dimensions of boards — Part 1: Determination of
thickness, width and lengthEN 438-2:2016+A1:2018, High-pressure decorative laminates (HPL) — Sheets based on thermosetting
resins (usually called laminates) — Part 2: Determination of propertiesEN ISO 2813, Paints and varnishes — Determination of gloss value at 20°, 60° and 85° (ISO 2813)
EN ISO 3668, Paints and varnishes — Visual comparison of the colour of paints (ISO 3668)
EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps (ISO 4892-2)ISO 9352, Plastics — Determination of resistance to wear by abrasive wheels
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp— IEC Electropedia: available at https://www.electropedia.org/
4 Test pieces
The test pieces for the following tests shall be taken at least 150 mm from the edge of the product.
When needed, the longitudinal or transverse direction of the decorative surface shall be specified by the
manufacturer for the tests on the products.5 Conditioning of test pieces
Unless specified otherwise for the individual tests, the test pieces shall be tested in the received state.
In cases of dispute or for type approval, the test pieces shall be conditioned in an atmosphere of
(23 ± 2) °C and (50 ± 5) % relative humidity to constant mass prior to testing.6 Test methods
6.1 Dimensions (thickness, length and width)
These properties shall be determined in accordance with EN 324-1.
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6.2 Flatness
6.2.1 Principle
Flatness is determined by measuring the maximal deviation of the board surface from a metal straight
edge placed at two selected positions parallel to the long and short edges of the board or panel.
6.2.2 ApparatusStraight edge, of (1 000 ± 1) mm length, with dial indicator gauge (comparator) graduated to permit a
reading accuracy of 0,1 mm.6.2.3 Test pieces
The test piece shall be the complete board under test, as received, stored in the conditions
recommended by the manufacturer.6.2.4 Procedure
Place the board in a vertical position free from restraint with one long edge resting on an essentially
horizontal floor. Place the flatness gauge on the concave surface at various positions. At each position,
measure the greatest distance between board surface and the flatness gauge with an accuracy of
0,1 mm.6.2.5 Expression of results
The result of the test is the highest recorded reading on the dial gauge in millimetres to the nearest
0,1 mm.6.3 Edge damage
6.3.1 Principle
Edge damage is determined by placing a graduated mask or tape measure on the board or panel under
test and measuring the size of chips of paper removed from the edges.6.3.2 Apparatus
A metal tape measure or mask graduated in divisions of 1 mm.
6.3.3 Test pieces
The test piece is the board or panel as received.
6.3.4 Procedure
The test piece is laid level on a protective surface. Loose surface contamination is to be removed using a
soft brush. Using the metal tape measure or the mask the size of the chip is measured at right angles to
the board edge, across the chip towards the centre of the board.6.3.5 Expression of results
Record the dimensions of the largest chip of paper removed to the nearest millimetre (mm).
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6.4 Surface defects
6.4.1 Principle
Inspection of boards for surface appearance under standardized conditions of lighting and viewing.
Surface defects are larger than 0,8 mm and those that can be identified when the surface texture is
viewed from a distance of 0,7 m and at an angle about of 45°.6.4.2 Apparatus
The light source shall provide a diffused illumination of (1 200 ± 400) lx over the whole area. This may
either be diffused daylight or be diffused artificial light. The daylight shall be unaffected by surrounding
trees, etc. When artificial daylight is used, it shall have a correlated colour temperature of (5 000 to
6 500) K and a Ra greater than 92, by using a colour matching booth in accordance with EN ISO 3668.
A convenient distance of the lights from the inspection table is approximately 1,5 m.
6.4.3 Test piecesThe test piece shall be the board under test, as received.
6.4.4 Procedure
Place the board, decorative face uppermost, on the inspection table and wipe it free of any loose
contamination, if necessary, with a soft cloth and any suitable cleaning agent if necessary. Inspect it
from the distance required (specified in 6.4.1) for defects such as smudges, smears, finger-prints,
scratches, foreign particles, damage or any other form of blemish evident within the decorative surface.
In case of cut to size panels the inspection shall be performed on the edges too.
The evaluation of the total area of spot-type defects in square millimetres and of the total length of hair-
like defects in millimetres may be carried out with the help of the Tappi Size Estimation Chart or with
an equivalent system. In case of dispute the inspection shall be carried out by three observers using the
Tappi Chart or an equivalent system.The inspector shall have normal vision, corrected if necessary. No magnifying glass shall be used in
viewing the sheet. In cases of doubt or dispute, three observers are required for the visual assessment.
All observers shall have good colour vision. In case of three observers, the reported rating for the test
surface shall be the average to the nearest nominal value.6.4.5 Expression of results
Record all defects identifying type, number and size of defects and sum up surfaces and length.
The admissible size of defects is based on a maximum contamination area equivalent to a unit of defects
and is proportional to the standard delivery size of the manufacturer. The total admissible area of
contamination may be concentrated in one spot or dispersed over an amount of smaller defects.
In case of pre-cut panels the cumulative defect is referred to the standard delivery sizes of the
manufacturers or amount of delivery.“Tappi Size Estimation Chart” is the trade name of a product supplied by TAPPI, Technology Park, P.O. Box
105113, Atlanta, GA 30348-5113, USA, tel. +1 770 446 1400, fax +1 770 446 6947. The article reference is: TAPPI -
Dirt size estimation chart. “Tappi size estimation chart” is an example of a suitable product available
commercially. This information is given for the convenience of users of this European Standard and does not
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2 2
EXAMPLE Permitted unit of defect (see EN 14322) in this sample is 2 mm /m
Standard delivery size of the manufacturer: 5 000 mm × 2 000 mm
Points:
The permissible total error (TE) is calculated as follows:
TE = Board length × Board width × Permitted unit of
2 2 2
defect = 5 000 mm × 2 000 mm × 2 mm /m = 20 mm
The following errors are therefore permitted:
1 × 20 mm defect, or
2 × 10 mm defect, or
3 × 6,6 mm defect etc.
Length:
The permissible total error (TE) is calculated as follows:
TE = Board length × Board width × Permitted unit of
defect = 5000 mm × 2000 mm × 20 mm/m = 200 mm
The following errors are therefore permitted:
1 × 200 mm defect
2 × 100 mm defect
3 × 66 mm defect etc.
6.5 Resistance to scratching
6.5.1 Principle
Increasing loads are applied in specified steps to a diamond scratching point of defined geometry.
The resistance to scratching of the melamine faced board under test is expressed as a numerical rating
which defines the minimum applied load which is producing a continuous surface scratch. The test
result is verified by visually confirming that the next higher load-step produces a continuous scratch.
6.5.2 ApparatusScratch testing apparatus and viewing enclosure as described in EN 438-2:2016+A1:2018, 25.3.
6.5.3 Test piecesCut a test piece 100 mm × 100 mm from the board under test. Wipe the surface using cotton fabric
impregnated with a solvent such as acetone. It is important that, once cleaned, the surface is not
fingered in the test area. Before making the scratch test store the test piece for 4 days in the standard
atmosphere according to Clause 5.6.5.4 Procedure
Follow the procedure in EN 438-2:2016+A1:2018, 25.6 with the following modifications.
Start the test by making two scratches at 1,0 N with a spacing of approximately1 mm between the
scratch marks. On the same test piece repeat this procedure with loads in increment of 0,5 N up to a
load of 4 N leaving a space of approximately 3 mm between each pair of scratches. Place the scratched
samples in the standard atmosphere, defined in Clause 5, for 24 h before final inspection.
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6.5.5 Expression of results
During the examination, the operator shall ensure that the double circle of scratch marks selected is
truly > 90 % continuous.The examination of the surface should take no longer than 10 s.
Record the minimum load giving a continuous mark visible after 24 h in the standard atmosphere. In
cases of dispute, three observers shall view the test piece and report their results independently; the
final result shall be the average of the three reported values, rounded to the next 0,1 N.
6.6 Resistance to staining6.6.1 Principle
Test pieces are left in contact with a series of staining agents which are likely to be encountered in
everyday use. The time and conditions of contact are specified for each staining agent. At the end of the
specified contact period the test pieces are washed and examined for residual surface marks.
6.6.2 Staining agentsThe test is carried out with the two representative staining agents: acetone and black coffee. Acetone is
applied at ambient temperature; black coffee of normal drinking strength is applied at approximately
80 °C. If the product under test meets specification requirements then it is deemed to comply with the
specification for stain resistance. Other staining agents are included in Table A.1 (see Annex A) for
information only and can be used after agreement between supplier and customer.6.6.3 Apparatus
— glass covering (e.g. watch glass) to prevent evaporation;
— cleaning agent;
— diffuse light source.
Light source providing evenly diffused light giving an illumination on the test surface of
(1 200 ± 400) lx. This may either be diffused daylight or be diffused artificial daylight.
The daylight should be unaffected by surrounding trees, etc. When artificial daylight is used it is
recommended that it should have a correlated colour temperature of (5 000 to 6 500) K and a Ra
greater than 92, by using a colour matching booth in accordance with EN ISO 3668.
6.6.4 Test piecesIndividual test pieces of any suitable size shall be used cut from the board under test. Where surface
finishes are different, state the side to be tested.Alternatively a single piece test specimen, large enough to allow the staining materials to be applied
side by side, can be used. Keep the test piece flat during the test. An area of about 100 mm × 100 mm is
required for each test.6.6.5 Procedure
The pieces shall be initially at room temperature. Apply a small quantity (for example 2 or 3 drops) of
staining agent to the test area. Cover the staining agents with a glass cover.After 16 h contact time has elapsed remove the staining agents completely. Then wash the test areas
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Leave the test pieces 24 h in normal ambient conditions. Then view from various angles at a distance of
400 mm using normal eyesight, corrected where necessary.NOTE If agreed, another examination can be made after a further specified period of time.
6.6.6 Expression of resultsUse following rating scale for evaluation:
— rating 5: No visible change; test area indistinguishable from adjacent surrounding area;
— rating 4...
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