1、BSI Standards PublicationPD CEN/TS 16499:2013Paints and varnishes Coatingmaterials and coating systemsfor exterior wood Resistanceto blocking of paints andvarnishes on woodPD CEN/TS 16499:2013 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation of CEN/TS16499:2013.The
2、 UK participation in its preparation was entrusted to TechnicalCommittee STI/28, Paint systems for non-metallic substrates.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 co
3、ntract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 78946 5ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under the auth
4、ority of theStandards Policy and Strategy Committee on 30 November 2013.Amendments issued since publicationDate Text affectedPD CEN/TS 16499:2013TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 16499 November 2013 ICS 87.040 English Version Paints and varnishes - Coatin
5、g materials and coating systems for exterior wood - Resistance to blocking of paints and varnishes on wood Peintures et vernis - Produits de peinture et systmes de peinture pour le bois en extrieur - Rsistance au blocage des peintures et vernis sur bois Beschichtungsstoffe - Beschichtungsstoffe und
6、Beschichtungssysteme fr Holz im Auenbereich - Bestimmung der Blockfestigkeit This Technical Specification (CEN/TS) was approved by CEN on 12 February 2013 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will b
7、e 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 CEN/TS available promptly at national level in an appropriat
8、e 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 of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republ
9、ic, 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, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN C
10、OMMITTEE 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 for CEN national Members. Ref. No. CEN/TS 16499:2013: EPD CE
11、N/TS 16499:2013CEN/TS 16499:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 5 5 Apparatus .5 6 Sampling .6 7 Test panels substrate test specimens .6 7.1 General 6 7.2 Substrate s1 Spruce .7 7.3 Substrate s2 Other wood species .7 7.4 Subst
12、rate s3 Inert substrate 7 7.5 Substrate s4 Other plane substrates 7 8 Application to the test specimens .8 8.1 General 8 8.2 Application to substrate s1 spruce, s2 other wood substrates, or substrate s4 - other plane substrates 8 8.3 Application to substrate s3 inert substrate or substrate s4 - othe
13、r plane substrates 8 8.4 Typical dry film thickness on stable wood constructions 9 9 Drying time .9 10 Preparation of test strips and specimen .9 10.1 General 9 10.2 Determination of the dry film thickness 9 11 Conditioning of test strips . 10 12 Application of load 10 12.1 General . 10 12.2 Load to
14、 be applied 11 12.3 Climatic conditions during loading . 12 13 Evaluation 13 14 Precision 14 15 Test report . 14 Annex A (normative) Necessary additional information. 15 Annex B (informative) Suggested form for specifying application parameters 16 Bibliography . 21 PD CEN/TS 16499:2013CEN/TS 16499:2
15、013 (E) 3 Foreword This document (CEN/TS 16499:2013) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or C
16、ENELEC shall not be held responsible for identifying any or all such patent rights. Remark about climatic conditions: EN 23270, Paints and varnishes and their raw materials Temperatures and humidity for conditioning and testing (ISO 3270) prescribe the use of standard conditions 23/50 (23 2) C and (
17、50 5) % relative humidity. Historically for wooden substrates there are a lot of mechanical properties which refer to the alternative standard conditions 20/65 (20 2) C and (65 5) % relative humidity according to ISO 554, Standard atmospheres for conditioning and/or testing Specifications. Therefore
18、, the use of standard conditions 20/65 instead of standard conditions 23/50 could be arranged but should be noted. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium,
19、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, Sweden, Switzerland
20、, Turkey and the United Kingdom. PD CEN/TS 16499:2013CEN/TS 16499:2013 (E) 4 1 Scope This Technical Specification specifies a test method for determining, under standard conditions, whether a single-coat film or a multi-coat system of paints and varnishes on wood after a specified drying period is s
21、ufficiently dry to avoid damage when two painted surfaces or one painted surface and another surface are placed in contact under pressure and subsequently separated. The method is intended to simulate the conditions when painted articles come into contact which each other. In comparison to EN ISO 91
22、17-2, the conditioning and parameters which influences the behaviour of wood coatings are more specific. NOTE In some countries, the test is called a “block or blocking resistance” test. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document
23、and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 927-1, Paints and varnishes - Coating materials and coating systems for exterior wood - Part 1
24、: Classification and selection EN 23270, Paints and varnishes and their raw materials - Temperatures and humidities for conditioning and testing (ISO 3270) EN ISO 1513, Paints and varnishes - Examination and preparation of test samples (ISO 1513) EN ISO 2808, Paints and varnishes - Determination of
25、film thickness (ISO 2808) EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 blocking unwanted adhesion between two surfaces, at least one of which
26、 has been coated, when they are left in contact under load after a given drying period SOURCE: EN ISO 4618:2006; 2.29 Note 1 to entry: Blocking does not apply to bonding of coated surfaces after insufficient drying. Note 2 to entry: In practice, blocking can occur if coated wood panels are stacked o
27、n each other or on windows and doors if the frames are in direct contact with the faces. Blocking depends on temperature and load (pressure). Note 3 to entry: The term blocking is also sometimes used to describe agglomerated caked powder. Note 4 to entry: Unwanted adhesion can lead to damage upon se
28、paration. 3.2 load mass needed to achieve a suitable test pressure PD CEN/TS 16499:2013CEN/TS 16499:2013 (E) 5 Note 1 to entry: High temperature and humidity increase the challenge at a given load. The application method, film thickness, drying conditions and climatic conditions should also be taken
29、 into account. 3.3 after tack property of a film to remain sticky after normal drying or curing SOURCE: EN ISO 4618:2006; 2.8 Note 1 to entry: The term after tack can also mean a subjectively stickiness of the surface (“finger tack” or “surface tack”). This effect however might not necessarily be re
30、lated to blocking. 3.4 stable mass mass achieved when the difference between two subsequent weighings within 24 h does not exceed 0,2 % SOURCE: EN 927-5:2006; 3.3 3.5 stackability resistance to damage due to unwanted adhesion between adjacent surfaces of articles that develops when these articles ar
31、e left in contact SOURCE: EN ISO 9117-2:2010; 3.1 4 Principle The coating material or the coating system under test is applied on test panels or cut strips under specified conditions. After specified drying time and under specified climatic conditions, the two test panels or cut stripes are placed c
32、rosswise in contact with each other. This assembly is subsequently placed in a test apparatus to be subjected to a specified load under specified climatic conditions. After a specified period of time, the load is removed and the test panels manually separated under specific climatic conditions and t
33、he contact areas examined for any damage to the coating in the area of contact. 5 Apparatus 5.1 Weights, of a mass which correspond to the requirements of 12.1. 5.2 Oven or conditioning chamber, depending on the selected climatic conditions during load (see Clause 11 or 12.3): Oven of appropriate si
34、ze, controlled at a temperature of (50 2) C or (60 2) C; climatic conditioning chamber where the selected climatic conditions can be achieved. 5.3 Inert substrate for application on Specimen s3. 5.3.1 Test panels1)(“strips”) made of polyvinyl chloride film free of migrating plasticizers, of sufficie
35、nt rigidity to ensure a flat surface, impervious to and unaffected by water or aliphatic organic solvents and of nominal 1)Suitable test foil made of plasticised PVC is available from Leneta Co. Whitney Road, Mahawa, NJ 07430-3129, USA, or Erichsen GmbH, Am Iserbach 14, D-58675 Hemer, Germany, or Sh
36、een Instruments, Unit 4, St Georges Industrial Estate, Richmond Road, Kingston, Surrey KT2 5BQ, United Kingdom. This information is given for the convenience of users of the document and does not constitute an endorsement by CEN of the product named. PD CEN/TS 16499:2013CEN/TS 16499:2013 (E) 6 thick
37、ness 0,25 mm. Other types of plastics film might be used where the coating material contains solvents which may adversely affect the PVC film. If the coating delaminates from the substrate before or during the test, another, more suitable substrate should be used. 5.3.2 Film applicator, preferably a
38、utomatic, used at an application speed of 10 mm/s to 15 mm/s and fitted with a doctor blade (see 8.2) with an appropriate gap clearance and a gap width of at least 60 mm. 5.3.3 Use cutting knife, metal template or straight-edge ruler to cut the foils. 5.4 Tools for application on test specimen s1, s
39、2, s4, (e.g. roller, brush, spray equipment) depending on the paint manufacturers specification. 6 Sampling Take a representative sample of the product to be tested (or of each product in the case of a multi-coat system), in accordance with EN ISO 15528. Examine and prepare each sample for testing i
40、n accordance with EN ISO 1513. 7 Test panels substrate test specimens 7.1 General Depending on the specimens provided for use, different application methods can be required (see Table 1) Table 1 Substrate Substrate (s) Type Description Recommended use s1 wood spruce (Picea abies) (see 7.1) standard
41、test method to check a coating system or a individual top coat. s2 other wood substrates any wood species (see 7.2) individual wood species on customer-specific requirement (e.g. a coated test specimen from which test panels can be cut) s3 inert substrate PVC-foil (see 5.3) lab test method to compar
42、e different top coats (simulation of the blocking behaviour on not absorbingsubstrates) s4 other plane substrates e.g. plywood according to EN 636 lab test method to compare differentcoating materials or coating systems. PD CEN/TS 16499:2013CEN/TS 16499:2013 (E) 7 7.2 Substrate s1 Spruce The wood sh
43、all be spruce (Picea abies) that has been selected to be free from knots and cracks, to be straight-grained and of normal growth rate (i.e. between 3 and 8 annual rings per 10 mm). The panels shall be planed all round to a smooth and uniform finish. The inclination of the growth rings to the test fa
44、ce shall be (45 10). See Figure 1. The wood shall be free from blue stain and evidence of surface or bulk infection. Abnormal porosity shall be avoided. Condition the wood prior to conversion into test panels in accordance with EN 23270 at (23 2) C and a relative humidity of (50 5) %. The density of
45、 the wood shall be between 0,4 g/cm3and 0,5 g/cm3when measured at an equilibrium moisture content at standard climate in accordance with EN 23270 at (23 2) C and a relative humidity of (50 5) %. Key 1 front of panel (test face) a min. 3, max. 8 growth rings per 10mm (applies for the whole panel) ang
46、le of growth rings to test face min. 35, max. 55 Figure 1 Selection of wood 7.3 Substrate s2 Other wood species In case of customer-specific requirements or if it might be assumed that other types of wood might give a different result an alternative wood species should be used as substrate. It is al
47、so an option for manufacturers to provide an already coated test specimen from which test panels can be cut. The chosen panel shall be precisely described in the test report. The surface of the specimens provided shall be plane. The test substrate shall be conditioned until constant mass at standard
48、 conditions according to EN 23270 (23 2) C and (50 5) % relative humidity. 7.4 Substrate s3 Inert substrate See 5.3. 7.5 Substrate s4 Other plane substrates The selected substrate should be precisely described in the test report. Alternatives that may be used include absorbing substrates (e.g. plywo
49、od) as well as non absorbing substrates (e.g. glass, aluminium, coated paper, polymer panels). Absorbing substrates should be conditioned until achieving constant mass at standard conditions according to EN 23270 (23 2) C and (50 5) % relative humidity. PD CEN/TS 16499:2013CEN/TS 16499:2013 (E) 8 8 Application to the test specimens 8.1 General Depending on the specimens provided for use, a different type of application might be required (see Table 2). Table 2 Type of appl
