1、August 2013 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、 83.060; 83.080.01!%($N“2050143www.din.deDDIN EN ISO 75-2Plastics Determination of temperature of deflection under load Part 2: Plastics and ebonite (ISO 75-2:2013);English version EN ISO 75-2:2013,English translation of DIN EN ISO 75-2:2013-08Kunststoffe Bestimmung der Wrmeformbestndigkeitstemperat
3、ur Teil 2: Kunststoffe und Hartgummi (ISO 75-2:2013);Englische Fassung EN ISO 75-3:2013,Englische bersetzung von DIN EN ISO 75-2:2013-08Plastiques Dtermination de la temprature de flchissement sous charge Partie 2: Plastiques et bonite (ISO 75-2:2013);Version anglaise EN ISO 75-2:2013,Traduction ang
4、laise de DIN EN ISO 75-2:2013-08SupersedesDIN EN ISO 75-2:2004-09www.beuth.deDocument comprises 15 pagesIn case of doubt, the German-language original shall be considered authoritative.07.13 DIN EN ISO 75-2:2013-08 2 A comma is used as the decimal marker. National foreword This document (EN ISO 75-2
5、:2013) has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee ISO/TC 249 “Plastics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Working Commit
6、tee NA 054-01-02 AA Mechanische Eigenschaften und Probekrper-herstellung. The DIN Standards corresponding to the International Standards referred to in Clause 2 of this standard are as follows: ISO 75-1 DIN EN ISO 75-1 ISO 293 DIN EN ISO 293 ISO 294-1 DIN EN ISO 294-1 ISO 2818 DIN EN ISO 2818 ISO 10
7、724-1 DIN EN ISO 10724-1 Amendments This standard differs from DIN EN ISO 75-2:2004-09 as follows: a) a fluidized bed or an air oven may also be used as heating equipment; b) the edgewise test position has been deleted; c) Annex A (informative) “Precision” has been extended to include further inform
8、ation concerning the new heating methods d) the standard has been editorially revised. Previous editions DIN 53461: 1961-06, 1969-09, 1987-01 DIN EN ISO 75-2: 1996-03, 2004-09 National Annex NA (informative) Bibliography DIN EN ISO 75-1, Plastics Determination of temperature of deflection under load
9、 Part 1: General test method DIN EN ISO 293, Plastics Compression moulding of test specimens of thermoplastic materials DIN EN ISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimens DIN EN IS
10、O 2818, Plastics Preparation of test specimens by machining DIN EN ISO 10724-1, Plastics Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) Part 1: General principles and moulding of multipurpose test specimens EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
11、ISO 75-2 April 2013 ICS 83.080.10 Supersedes EN ISO 75-2:2004English Version Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite (ISO 75-2:2013) Plastiques - Dtermination de la temprature de flchissement sous charge - Partie 2: Plastiques et bonite (ISO 75
12、-2:2013) Kunststoffe - Bestimmung der Wrmeformbestndigkeitstemperatur - Teil 2: Kunststoffe und Hartgummi (ISO 75-2:2013) This European Standard was approved by CEN on 21 March 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
13、his European 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official
14、 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 Aus
15、tria, 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, Swed
16、en, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG 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 M
17、embers. Ref. No. EN ISO 75-2:2013: EEN ISO 75-2:2013 (E) Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Principle 6 5 Apparatus .6 5.1 Means of producing a flexural stress 6 5.2 Heating equipment.6 5.3 Weights .6 5.4 Temperature-measuring ins
18、trument 6 5.5 Deflection-measuring instrument 6 6 Test specimens 6 6.1 General 6 6.2 Shape and dimensions 6 6.3 Specimen inspection .7 6.4 Number of test specimens 7 6.5 Test-specimen preparation .7 6.6 Annealing 7 7 Conditioning .7 8 Procedure .7 8.1 Calculation of force to be applied 7 8.2 Initial
19、 temperature of the heating equipment 7 8.3 Measurement 7 9 Expression of results 8 10 Precision .8 11 Test report 8 Annex A (informative) Precision 9 Bibliography 13 2DIN EN ISO 75-2:2013-08 EN ISO 75-2:2013 (E) 3DIN EN ISO 75-2:2013-08 Foreword This document (EN ISO 75-2:2013) has been prepared by
20、 Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by O
21、ctober 2013, and conflicting national standards shall be withdrawn at the latest by October 2013. Attention is drawn to the possibility that some of the 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 pat
22、ent rights. This document supersedes EN ISO 75-2:2004. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finl
23、and, 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 the United Kingdom. Endorsement notice The text of I
24、SO 75-2:2013 has been approved by CEN as EN ISO 75-2:2013 without any modification. IntroductionThe first editions of ISO 75-1 and this part of ISO 75 described three methods (A, B and C) using different test loads and two specimen positions, edgewise and flatwise. For testing in the flatwise positi
25、on, test specimens with dimensions 80 mm 10 mm 4 mm were required. These can be moulded directly or machined from the central section of the multipurpose test specimen (see ISO 20753).The previous (i.e. second) editions of ISO 75-1 and this part of ISO 75 specified the flatwise test position as pref
26、erred, while still allowing testing in the edgewise position with test conditions given in Annex A until the next revision of ISO 75-1 and this part of ISO 75, as agreed in ISO/TC 61/SC2/WG 5. Therefore, with this revision, the edgewise test position will be removed.Technical development of testing
27、instruments in recent years made instruments based on a fluidized bed or air ovens available. These are especially advantageous for use at temperatures at which the common silicone oil-based heat transfer fluids reach their limit of thermal stability. The fluidized bed and air oven methods of heat t
28、ransfer are introduced in ISO 75-1.An additional precision statement covering the new heating methods is introduced in this part of ISO 75.EN ISO 75-2:2013 (E) 4DIN EN ISO 75-2:2013-08 1 ScopeThis part of ISO 75 specifies three methods, using different values of constant flexural stress, which can b
29、e used for the determination of the temperature of deflection under load of plastics (including filled plastics and fibre-reinforced plastics in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite: m ethod A, using a flexural stress of 1,80 MPa; m ethod B, using a flexural stre
30、ss of 0,45 MPa; m ethod C, using a flexural stress of 8,00 MPa.The standard deflection, s, used to determine the temperature of deflection under load corresponds to a flexural-strain increase, f, defined in this part of ISO 75. The initial flexural strain due to the loading of the specimen at room t
31、emperature is neither specified nor measured in this part of ISO 75. The ratio of this flexural-strain increase to the initial flexural strain depends on the modulus of elasticity, at room temperature, of the material under test. This method is, therefore, only suitable for comparing the temperature
32、s of deflection of materials with similar room-temperature elastic properties.NOTE 1 The methods give better reproducibility with amorphous plastics than with semi-crystalline ones. With some materials, it can be necessary to anneal the test specimens to obtain reliable results. Annealing procedures
33、, if used, generally result in an increase in the temperature of deflection under load (see 6.6).NOTE 2 For additional information, see ISO 75-1:2013, Clause 1.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for it
34、s application. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 75-1, Plastics Determination of temperature of deflection under load Part 1: General test methodISO 293, Plastics Compression moulding of test specimens of thermoplastic materi
35、alsISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimensISO 2818, Plastics Preparation of test specimens by machiningISO 10724-1, Plastics Injection moulding of test specimens of thermosetti
36、ng powder moulding compounds (PMCs) Part 1: General principles and moulding of multipurpose test specimensISO 20753, Plastics Test specimensEN ISO 75-2:2013 (E) 5DIN EN ISO 75-2:2013-08 3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 75-1 apply.NOTE D
37、epending on the selected value of the flexural stress (see Clause 1), the temperature of deflection under load (see definition 3.7 in ISO 75-1:2013)is designated as Tf0,45, Tf1,8 or Tf8,0.4 PrincipleThe principle is specified in ISO 75-1:2013, Clause 4.5 Apparatus5.1 Means of producing a flexural st
38、ressThis is specified in ISO 75-1:2013, 5.1.The span (distance between the lines of contact between specimen and supports) shall be (64 1) mm for testing.5.2 Heating equipmentThis is specified in ISO 75-1:2013, 5.2.5.3 WeightsThis is specified in ISO 75-1:2013 5.3.5.4 Temperature-measuring instrumen
39、tThis is specified in ISO 75-1:2013, 5.4.5.5 Deflection-measuring instrumentThis is specified in ISO 75-1:2013, 5.5.6 Test specimens6.1 GeneralThis is specified in ISO 75-1:2013, 6.1.6.2 Shape and dimensionsSee ISO 75-1:2013, 6.2.The preferred test-specimen dimensions are:length l: (80 2,0) mm;width
40、 b: (10 0,2) mm;thickness h: (4 0,2) mm.EN ISO 75-2:2013 (E) 6DIN EN ISO 75-2:2013-08 6.3 Specimen inspectionThis is specified in ISO 75-1:2013, 6.3.6.4 Number of test specimensThis is specified in ISO 75-1:2013, 6.4.6.5 Test-specimen preparationTest specimens shall be produced in accordance with IS
41、O 293 (and ISO 2818, if applicable), or in accordance with ISO 294-1 or ISO 10724-1, or as agreed by the interested parties. The test results obtained on moulded test specimens depend on the moulding conditions used in their preparation. The moulding conditions shall be in accordance with the standa
42、rd for the material concerned, or as agreed by the interested parties.In the case of compression-moulded specimens, the thickness shall be in the direction of the moulding force. For materials in sheet form, the thickness of the test specimens (this dimension is usually the thickness of the sheet) s
43、hall be in the range 3 mm to 13 mm, preferably between 4 mm and 6 mm.The specimen may be taken from the narrow central part of the multipurpose test specimen specified in ISO 20753 (specimen type A1).6.6 AnnealingDiscrepancies in test results due to variations in moulding conditions may be minimized
44、 by annealing the test specimens before testing them. Since different materials require different annealing conditions, annealing procedures shall be employed only if required by the materials standard or if agreed upon by the interested parties.7 ConditioningThis is specified in ISO 75-1:2013, Clau
45、se 7.8 Procedure8.1 Calculation of force to be appliedThis is specified in ISO 75-1:2013, 8.1.The flexural stress produced shall be one of the following: 1 ,80 MPa (preferred value), in which case the method is designated method A; 0 ,45 MPa, in which case the method is designated method B; 8 ,00 MP
46、a, in which case the method is designated method C.8.2 Initial temperature of the heating equipmentThis is specified in ISO 75-1:2013, 8.2.8.3 MeasurementThis is specified in ISO 75-1:2013, 8.3.Apply the force required to produce one of the flexural stresses specified in 8.1.EN ISO 75-2:2013 (E) 7DI
47、N EN ISO 75-2:2013-08 Calculate the standard deflection, s, by means of Formula (4) in ISO 75-1:2013 using a value of 0,2 % for the flexural-strain increase f.Record the temperature at which the initial deflection of the bar has increased by the standard deflection. This temperature is the temperatu
48、re of deflection under load. If the individual results for amorphous plastics or ebonite differ by more than 2 C, or those for semi-crystalline materials by more than 5 C, repeat tests shall be carried out.Table 1 Standard deflections for different test-specimen heights for a 80 mm length 10 mm width specimen testedTest-specimen height (thickness h of specimen) mmStandard deflection mm3,83,94,04,14,20,360,350,340,330,32NOTE The thicknesses in Table 1 reflect the acceptable variat
