1、CEN EN*L087-L 95 3404589 0094498 Tb8 BRITISH STANDARD Particleboards - Determination of moisture resistance Part 1. Boil test The European Standard EN 1087-1 : 1995 has the status of a British Standard BS EN 1087-1 : 1995 CEN ENUL087-L 95 m 3404589 0094499 9T4 m BS EN 1087-1 : 1995 was published und
2、er the authority of the Standards Board and comes into effect on 15June1995 O BSI 1995 Amd. No. The following BSI references relate to the work on this standard: Committee reference B1541 Draft for comment 93110436 DC ISBN O 580 23838 5 Committees responsible for this British Standard Date Text affe
3、cted The preparation of this British Standard was entrusted to Technical Committee B/541, Wood-based panels, upon which the following bodies were represented: American Plywood Association Association of British Plywood and Veneer Manufacturers British Woodworking Federation Chartered Institute of Bu
4、ilding Co-ordinator for Timber and Timber Products Council of the Forest Industries of British Columbia Department of the Environment (Building Research Establishement) Finnish Plywood International Fiat Roofing Contractors Advisory Board Forestry Commission Furniture Industry Research Association I
5、nstitution of Structural Engineers Local Authority Organizations Mineral Bonded Board Products Federation National Federation of Roofing Contractors National House-building Council National Panel Products Association Royal Institute of British Architects Structural Board Association Timber Research
6、and Development Association Timber Trade Federation Wood Panel Products Federation Zurich Insurance Company CEN EN*l1087-1 95 3404589 0094500 446 m BS EN 1087-1 : 1995 Contents page Committees responsible Inside front cover National foreword ii Foreword 2 Rxt of EN 1087-1 3 1 CEN EN*L087-L 95 = 3404
7、589 0094503 382 BS EN 1087-1 : 1995 National foreword This British Standard has been prepared by %chnical Committee B/541 and is the Engsh language version of EN 1087-1 : 1995 Particleboards - Detemination of misture resistance - Part 1 : Boil test. EN 1087-1 : 1995 was produced as a result of inter
8、national discussion in which the United Kingdom took an active part. This method of test is not comparable with any of the methods of test given in BS 1142 ; 1989 Spec$fication for fibre building boards, or BS 5669 : Part 1 : 1989 Particleboard Part 1. Methods of sampling, conditioning and test, bot
9、h of which will be withdrawn in due course. Cross-references Publication referred to EN 314-2 : 1993 EN 319 : 1993 Corresponding British Standard BS EN 314 Plywood. Bonding quality Pari 2 : 1993 Requirements BS EN 319 : 1993 Particleboards and fibreboards. Determination of tensile strength perpendic
10、ular to the plane of the board BS EN 325 : 1993 Wood-based panek. Determination of dimensions of test pieces EN 325 : 1992 Compliance with a British Standard does not of itself confer immunity from legal obligations. ii CEN EN*L087-L 95 m 3404589 0094502 219 m EUROPEAN STANDARD NORME EUROPENNE EUROP
11、ISCHE NORM EN 1087-1 February 1995 ICs 79.060.20 Descriptors: wooden boards, fibreboards, particleboards, moisture proofing, immersion tests, boiling water, tensile strength English version Particleboards - Determination of moist Ure resistance Part 1. Boil test Panneaux de particules Spanplatten Dt
12、ermination de la rsistance lhumidit Partie 1. Essai leau bouillante Bestimmung der Feuchtebestndigkeit Wil 1. Kochprfung This European Standard was approved by CEN on 1994-10-31. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this E
13、uropean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (Engl
14、ish, 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, F
15、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050
16、 Brussels O 1995 Copyright reserved to CEN members Ref. No. EN 1087-1 : 1995 E - CEN EN+L087-L 95 3404589 0094503 155 H Page 2 EN 1087-1 : 1995 Foreword Contents This European Standard was prepared by Technical Committee CEN/X 112, Woodbased panels, of which the secretariat is held by DIN. Foreword
17、1 L This European Standard shall be given the status of identical text or by endorsement, at the latest by August 1995, and conflicting national standards shall be withdrawn at the latest by August 1995. According to the CENKENELEC Internal Regulations, the following countries are bound to Belgium,
18、Denmark, Finland, hnce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom a national standard, either by publication of an 2 3 4 5 6 7 8 implement this European Standard: Austria, Scope Normative references Principle Appar
19、atus Test pieces Procedure Expression of results Est report Page 2 3 3 3 3 5 5 5 5 CEN EN*1087-1 95 3404589 0094504 091 1 Scope This European Standard specifies a method of test for evaluating the bond quality of particleboards, intended for use in humid conditions according to option 2 of EN 312-5
20、and EN 312-7. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendmen
21、ts to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 312-5 Particleboards - Specifications - Part 5: Requirements for load- bearing
22、boards for use in humid conditionsi) Part 7: Requirements for heavy duty load- bearing boards for use in humid conditionsi) EN 314-2 Plywood - Bonding quality - Part 2: Requirements EN 319 Particleboards and fibreboards - Determination of tensile strength perpendicular to the plane of the board EN 3
23、25 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 312-7 Particleboards - Specifications - Page 3 EN 1087-1 : 1995 3 Principle Tensile streng
24、th, perpendicular to the plane of the board (internal bond), is determined using test pieces which have been immersed in boiling water. 4 Apparatus 4.1 Sliing caliper A sliding caliper as specified in EN 325. 4.2 Water bath Temperature controlled laboratory water bath, capable of raising the content
25、s to boiling point at a specified rate (see 6.1) and maintaining boiling for not less than 2 h. 4.3 Testing machine As described in EN 319. 4.4 Testing blocks Blocks of either metal or plywood to which the test pieces are glued (see figure 1). Plywood blocks shall be made from beech plywood conformi
26、ng to bonding class 3 (exterior) of EN 314-2. They shall be not less than 15 mm in thickness and composed of not less than nine plies. Plywood of equivalent bending stiffness made from other species may be used. Solid wooden blocks shall not be used. When thin boards ( 800 kg/m3) are tested, metal b
27、locks shall be used. 1) At present at the draft stage. CEN EN*L087-L 95 m 3404589 0094505 T28 m Page 4 EN 1087-1 : 1995 4 I so I Dimensions in miiiimetres 1 Metal testing block 2 Testing block (metal or plywood) 3 Plywood testing block (not suitable for thin boards) 4 Test piece 6 Self-aligning bal-
28、and-socket-joint t 216 mm 4 4 Figure 1. Examples of apparatus for testing tensile strength perpendicular to the plane of the board CEN EN*l108-L 95 m 3404589 0094506 964 m Page 5 EN 1087-1 : 1995 5 Wst pieces 5.1 Sampling Sampling and cutting of at least eight test pieces per panel shall be carried
29、out according to the principles of EN 326- 1. 5.2 Dimensions As described in EN 319. 5.3 Conditioning Both the test pieces and the plywood testing blocks shall be separately conditioned to constant mass in a standard climate of (20 f 2) OC and relative humidity of (65 f 5) %. Constant mass is consid
30、ered to have been reached when the results of two successive weighing operations carried out at an interval of 24 h do not differ by more than 0,1 !X of the mass. 5.4 Measurement of dimensions After conditioning, measure the length and width of each test piece according to EN 325. 5.5 Bonding of the
31、 test pieces to the testing blocks Bond each test piece to testing blocks, using a suitable adhesive. The upper and lower blocks shall be orientated at 90 as shown in figure 1. Excess glue squeezed out from the glueline shall be removed before testing. When gluing, additional stresses affecting the
32、test piece, e.g. caused by the moisture contained in the adhesive, and/or any rise in temperature, shall be avoided as far as possible. NOTE 1. The following combinations have proved suitable: - epoxy resins with metal blocks - epoxy resins, phenol-resorcinol resins and two component polyurethane re
33、sins with hardwood plywood blocks. NOTE 2. The cleaning of metal blocks for re-use can be carried out as follows. After roughly removing the remains of the broken test pieces, the metal blocks are immersed in acetone for 12 h to 24 h. Thereafter, the remaining glue can be easily removed. Warning: Ac
34、etone is highly flammable. Immersion in water shall only be carried out after the glue has had sufficient time to cure (so that rupture does not occur in the glueline) and after the test pieces have had sufficient time to regain an equal distribution of moisture. During this time, the glued assembly
35、 shall be stored under controlled conditions of (65 f 5) % relative humidity and a temperature of (20 f 2) OC. NTE 3. Experience has shown that equilibrium conditions are reached in approximately 24 h if epoxy resins are used and approximately 72 h if phenol-rescorcinol resins are used. 6 Procedure
36、6.1 Boil treatment Place the test pieces, glued to their testing blocks, in the water bath (4.2) and cover them with clean water, having a temperature of (20 f 5) OC and a pH of 7 f 0,5. They shall be separated from each other, and from the sides and bottom of the waterbath by at least 15 mm, to all
37、ow free circulation of the water. This distance shall be maintained throughout the treatment. Renew the water at the start of each test. Heat the water to boiling point (5: 100 OC) over a period of (90 f 10) min. Continue boiling for (120 f 5) min. Remove and cool the test pieces. 6.2 Cooling of tes
38、t pieces before testing Place and keep the test pieces in water at (20 f 5) OC, immediately after removal from the boiling water, and leave them immersed for between 1 h and 2 h. Mop off excess water and test them in the wet condition. 6.3 Application of the load and measurement of failing load As d
39、escribed in EN 319. 7 Expression of results As described in EN 319. 8 Wst report As described in EN 326- 1. BS EN 1087-1 : 1995 List of references See national foreword. Previous page is blank BS EN 1087-1 : 1995 BSI 389 Chiswick High Road London W4 4AL 9506- 5- O. tik- FP CEN EN*L087-1 95 3404589 0
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