1、BSI Standards PublicationPD CEN/TS 16526:2013Sandwich boards for furniture(SWB-F) Factory madeproducts Definition,classification and testmethods for determination ofperformance characteristicsPD CEN/TS 16526:2013 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation of
2、CEN/TS16526:2013.The UK participation in its preparation was entrusted to TechnicalCommittee B/541, Wood based panels.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contrac
3、t. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 81299 6ICS 79.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under the author
4、ity of theStandards Policy and Strategy Committee on 30 November 2013.Amendments issued since publicationDate Text affectedPD CEN/TS 16526:2013TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 16526 November 2013 ICS 79.060.01 English Version Sandwich boards for furnitur
5、e (SWB-F) - Factory made products - Definition, classification and test methods for determination of performance characteristics Panneaux sandwiches pour meubles (SWB-F) - Produits manufacturs - Dfinition, classification et mthodes dessai pour la dtermination des proprits fonctionelles Sandwichplatt
6、en fr Mbel (SWB-F) - Werkmig hergestellte Produkte - Definition, Klassifizierung und Prfverfahren zur Bestimmung der LeitstungseigenschaftenThis Technical Specification (CEN/TS) was approved by CEN on 15 June 2013 for provisional application. The period of validity of this CEN/TS is limited initiall
7、y to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the C
8、EN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies o
9、f Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
10、 Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide f
11、or CEN national Members. Ref. No. CEN/TS 16526:2013 EPD CEN/TS 16526:2013CEN/TS 16526:2013 (E) 2 Contents Page Foreword 4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Classification 9 4.1 General 9 4.2 Classification according to board lay-up 9 4.3 Classification according to surf
12、ace appearance 9 4.4 Classification according to conditions of use 9 4.5 Classification according to application purposes .9 5 Symbols . 10 5.1 General . 10 5.2 Symbols related to conditions of use . 10 5.3 Symbols related to specific applications . 10 5.4 Combination of symbols for identification o
13、f sandwich boards . 10 6 Conditioning and test conditions 10 7 Sampling, preparation and handling of test pieces and expression of test results 11 7.1 General requirements . 11 7.2 Testing of SWB-F in combination with auxiliary material(s) or after execution of additional processing steps 12 7.3 Tes
14、t piece size . 12 7.4 Determination of dimensions of test pieces 12 7.5 Expression of test results 13 8 Test methods . 13 8.1 General guideline on the description and use of test methods . 13 8.2 Physical properties . 13 8.2.1 Determination of board dimensions . 13 8.2.2 Moisture content . 13 8.2.3
15、Apparent density and mass per unit area 14 8.2.4 Linear expansion due to changes in relative humidity . 14 8.2.5 Behaviour under humidity variations in successive uniform climates . 14 8.2.6 Moisture resistance 14 8.3 Mechanical properties 16 8.3.1 Flexural properties 16 8.3.2 Surface soundness . 18
16、 8.3.3 Compressive properties perpendicular to the plane of the board 18 8.3.4 Impact resistance 21 8.3.5 Shear strength . 22 8.4 Properties relevant to processing and to performance in use 23 8.4.1 General . 23 8.4.2 Integrity of board edges . 24 8.4.3 Quality of edge banding . 24 8.4.4 Load bearin
17、g capacity of fasteners 30 8.4.5 Shear resistance of a grooved board . 33 8.5 Formaldehyde emission . 34 9 Marking 34 PD CEN/TS 16526:2013CEN/TS 16526:2013 (E) 3 10 Test report 34 Annex A (normative) Test methods 36 Annex B (informative) Characterization of sandwich boards for different applications
18、 in furniture manufacturing 48 Bibliography 51 PD CEN/TS 16526:2013CEN/TS 16526:2013 (E) 4 Foreword This document (CEN/TS 16526:2013) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of t
19、he elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce t
20、his Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
21、 Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SAFETY STATEMENT Persons using this document should be familiar with the normal laboratory practice, if applicable. This document does not purport to address all of the safety problems, if any, associated with its use. I
22、t is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory conditions. ENVIRONMENTAL SAFETY It is understood that some of the material permitted in this standard may have negative environmental impact. As technological advant
23、ages lead to better alternatives for these materials, they will be eliminated from this standard to the extent possible. At the end of the test, it is recommended that the user of the standard takes care to carry out an appropriate disposal of the wastes, according to local regulation. PD CEN/TS 165
24、26:2013CEN/TS 16526:2013 (E) 5 1 Scope This European Technical Specification defines terms, establishes a classification and specifies test methods for flat, factory made, non-structural, faced and unfaced sandwich boards for use in furniture manufacturing (SWB-F) for dry (service class 1) and humid
25、 conditions (service class 2). This European Technical Specification does not specify requirements. Guidance is provided for the selection of board properties which are relevant for specific board applications. This European Technical Specification is not applicable to products which are already cov
26、ered by existing standards. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
27、ocument (including any amendments) applies. EN 311, Wood-based panels - Surface soundness - Test method EN 318, Wood based panels - Determination of dimensional changes associated with changes in relative humidity EN 320, Particleboards and fibreboards - Determination of resistance to axial withdraw
28、al of screws EN 322, Wood-based panels - Determination of moisture content EN 324-1, Wood-based panels - Determination of dimensions of boards - Part 1: Determination of thickness, width and length EN 324-2, Wood-based panels - Determination of dimensions of boards - Part 2: Determination of squaren
29、ess and edge straightness EN 325, Wood-based panels - Determination of dimensions of test pieces EN 326-1, Wood-based panels - Sampling, cutting and inspection - Part 1: Sampling and cutting of test pieces and expression of test results EN 326-2, Wood-based panels - Sampling, cutting and inspection
30、- Part 2: Initial type testing and factory production control EN 326-3, Wood-based panels - Sampling, cutting and inspection - Part 3: Inspection of an isolated lot of panels EN 438-2, High-pressure decorative laminates (HPL) - Sheets based on thermosetting resins (usually called Laminates) - Part 2
31、: Determination of properties EN 717-1, Wood-based panels - Determination of formaldehyde release - Part 1: Formaldehyde emission by the chamber method EN 717-2, Wood-based panels - Determination of formaldehyde release - Part 2: Formaldehyde release by the gas analysis method EN 789, Timber structu
32、res - Test methods - Determination of mechanical properties of wood based panels EN 826, Thermal insulating products for building applications - Determination of compression behaviour PD CEN/TS 16526:2013CEN/TS 16526:2013 (E) 6 EN 950, Door leaves - Determination of the resistance to hard body impac
33、t EN 1294, Door leaves - Determination of the behaviour under humidity variations in successive uniform climates EN 1383, Timber structures - Test methods - Pull through resistance of timber fasteners EN 1464, Adhesives - Determination of peel resistance of adhesive bonds - Floating roller method EN
34、 1995-1-1, Eurocode 5: Design of timber structures - Part 1-1: General - Common rules and rules for buildings EN 14323:2004, Wood-based panels - Melamine faced boards for interior uses - Test methods EN 14727:2005, Laboratory furniture - Storage units for laboratories - Requirements and test methods
35、 DIN 53293, Testing of sandwiches - Bending test 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 sandwich board SWB laminar composite product consisting of at least two skins positioned on either side of a core, which is firmly connected to t
36、he skins (e.g. by bonding, by core-generated adhesion) so that the three (or more) components act compositely when under load Note 1 to entry: Wood or other lignocellulosic materials constitute at least one of the components. 3.2 skin flat sheet firmly connected to the core and designed to support i
37、n-plane tensile or compressive loads in a sandwich board Note 1 to entry: Sheets used as skins can consist of composite materials. Note 2 to entry: Skins in sandwich boards for furniture commonly consist of particleboard (EN 309), fibreboard (EN 316), plywood (EN 636) etc. Note 3 to entry: If skins
38、consist of or contain veneers (excluding decorative veneer applied to skins in faced SWB-F) or plywood, this SWB can be considered as a core or composite plywood as defined in EN 3132. The corresponding standards can apply in particular, the requirements and test methods pertaining to the bonding qu
39、ality. 3.3 core centrally positioned layer of material, generally low in density, which is bonded between two skins and is designed to support normal compressive and tensile loads and to transfer shear loads in a sandwich board 3.4 core material homogeneous or inhomogeneous material used in manufact
40、uring the core Note 1 to entry: Homogeneous and inhomogeneous core materials provide continuous and discontinuous supports of the skins, respectively. Homogeneous (e.g. balsa wood, foams) or inhomogeneous (e.g. honeycomb cores) core materials can be isotropic or anisotropic. PD CEN/TS 16526:2013CEN/
41、TS 16526:2013 (E) 7 Note 2 to entry: Core materials in sandwich boards for furniture are commonly lightweight materials such as paper, metal or composite honeycomb, open and closed cell foam, corrugated material, bonded composite tubes, or naturally occurring materials such as balsa wood or lightwei
42、ght (wood) fibre-based boards. 3.5 homogenous material material in which on a macroscopic scale relevant properties are not a function of the position within the material itself but may be a function of such parameters as time, direction, temperature, etc. 3.6 inhomogeneous material material, also o
43、ften referred to as non-homogeneous or structured in which on a macroscopic scale relevant properties are a function of the position within the material itself and relevant properties may be a function of such parameters as time, direction, temperature, etc. 3.7 isotropic exhibiting the same physica
44、l and mechanical properties along different axes 3.8 anisotropic not isotropic exhibiting different physical and mechanical properties along different axes 3.9 x-axis in sandwich boards, an axis in the plane of the skins which is used as the 0 degree reference or major axis Note 1 to entry: The boar
45、d dimension in the direction of the x-axis is referred to as the length of the board. 3.10 x-y plane in sandwich boards, the reference plane parallel to the plane of the skins 3.11 y-axis in sandwich boards, the axis in the plane of the skins which is perpendicular to the x-axis and which is referre
46、d to as the minor axis Note 1 to entry: The board dimension in the direction of the y-axis is referred to as the width of the board. 3.12 z-axis in sandwich boards, the reference axis normal to the plane of the skins Note 1 to entry: The board dimension in the direction of the z-axis is referred to
47、as the thickness of the board. 3.13 structural unit SU entity which is repeated periodically in an inhomogeneous core material whose properties vary along the x- or y-axis of the sandwich board Note 1 to entry: An example of a structural unit is a honeycomb cell in a honeycomb core or a single profi
48、le in a corrugated core. PD CEN/TS 16526:2013CEN/TS 16526:2013 (E) 8 3.14 factory made mass manufactured commodity product supplied on the open market for the purpose of fabrication of furniture components or furniture Note 1 to entry: Factory made SWB-F can be subjected by the board manufacturer to
49、 additional value-adding processes (e.g. application of decorative surfaces to skins, cutting of boards to customer-specific dimensions, installation of edge-banding). Note 2 to entry: Purpose built or custom sandwich board manufactured by a furniture producer for a specific furniture product is not considered SWB-F as covered by this European Technical Specification. 3.15 dry conditions conditions corresponding to service class 1 of EN 1995-1-1 which is characterized by a moisture content in the material corresponding to a temperature of 20 C and a relative humi
