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1、BRITISH STANDARD BS EN ISO 75-2:2004 Incorporating Corrigendum No. 1 Plastics Determination of temperature of deflection under load Part 2: Plastics and ebonite This European Standard EN ISO 75-2:2004 has the status of a British Standard ICS 83.080.01; 83.060 BS EN ISO 75-2:2004 This British Standar
2、d was published under the authority of the Standards Policy and Strategy Committee on 28 May 2004 BSI 2006 ISBN 0 580 43822 8 National foreword This British Standard is the official English language version of EN ISO 75-2:2004, including Corrigendum April 2006. It is identical with ISO 75-2:2004. It
3、 supersedes BS EN ISO 75-2:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/21, Plastics test methods, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-re
4、ferences The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of Brit
5、ish Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; presen
6、t to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an in
7、side front cover, the EN ISO title page, EN ISO foreword page, ISO title page, pages ii and v, a blank page, pages 1 to 10, the inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd
8、. No. DateComments 16416 Corrigendum No. 1 August 2006 Correction to title EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 75-2 May 2004 ICS 83.080.01;83.060 Supersedes EN ISO 75-2:1996 Incorporating Corrigendum April 2006 English version Plastics - Determination of temperature of deflectio
9、n under load - Part 2: Plastics and ebonite (ISO 75-2:2004) Plastiques - Dtermination de la temprature de flchissement sous charge - Partie 2: Plastiques et bonite (ISO 75-2:2004) Kunststoffe - Bestimmung der Wrmeformbestndigkeitstemperatur - Teil 2: Kunststoffe und Hartgummi (ISO 75-2:2004) This Eu
10、ropean Standard was approved by CEN on 20 June 2003. 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. Up-to-date lists and bibliographical references co
11、ncerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists 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
12、 language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg
13、, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Management Centre: rue de stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. EUROPEAN COMMITTEE F
14、OR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Ref. No. EN ISO 75-2:2004: E I NESO -57:2002( 4E) 2 Foreword This document (EN ISO 75-2:2004) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics“
15、, the secretariat of which is held by IBN. 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 November 2004, and conflicting national standards shall be withdrawn at the latest by November 2004. This
16、 document supersedes EN ISO 75-2:1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hunga
17、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 75-2:2004 has been approved by CEN as EN ISO 75-2:2004 without any modifications. EN ISO 752
18、:2004 Reference number ISO 75-2:2004(E) OSI 4002 INTERNATIONAL STANDARD ISO 75-2 Second edition 2004-05-15 Plastics Determination of temperature of deflection under load Part 2: Plastics and ebonite Plastiques Dtermination de la temprature de flchissement sous charge Partie 2: Plastiques et bonite E
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24、 All irthgs ersedevriii Contents Page Foreword iv Introduction. v 1Scope 1 2Normative references 1 3Terms and definitions. 2 4Principle . 2 5Apparatus. 2 6Test specimens . 2 7Conditioning 3 8Procedure (flatwise testing). 3 9Expression of results 4 10Precision 4 11Test report 5 Annex A (normative) Te
25、sting in the edgewise position 6 Annex B (informative) Precision . 8 Bibliography 10 EN ISO 752:2004 IS-57 O2:(4002)E ivI SO 4002 All irthgs ersedevr Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work
26、 of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmen
27、tal, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The ma
28、in task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. At
29、tention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 75-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical propert
30、ies. This second edition cancels and replaces the first edition (ISO 75-2:1993), which has been technically revised. ISO 75 consists of the following parts, under the general title Plastics Determination of temperature of deflection under load: ? Part 1: General test method ? Part 2: Plastics and eb
31、onite ? Part 3: High-strength thermosetting laminates and long-fibre-reinforced plastics Annex A forms a normative part of this part of ISO 75. Annex B is for information only. EN ISO 752:2004 IS-57 O2:(4002)E I SO 4002 All irthgs ersedevrv Introduction ISO 75-1:1993 and ISO 75-2:1993 described thre
32、e methods (A, B and C) using different test loads and two specimen positions, edgewise and flatwise. For testing in the flatwise position, 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 sp
33、ecimen (see ISO 3167). These “ISO bars” cannot be easily used in the edgewise position, because this would require both a reduction in span and an increase in test load by the same factor, and this may be impossible to achieve on existing instruments for edgewise testing. Specimens for testing in th
34、e edgewise position are less closely specified. Using the 80 mm ? 10 mm ? 4 mm ISO bar has the following advantages: ? Thermal expansion of the test specimen has less influence on the test result. ? Draft angles do not influence the test result. The specimen does not stand “on edge”. ? The moulding
35、parameters and the specimen dimensions are specified more closely. This increases the comparability of the test results. Therefore, it was decided that the possibility of testing in the edgewise position would be deleted from the standard. In order to provide a sufficient transition period, in this
36、edition the flatwise position is described as the preferred and recommended one, while testing in the edgewise position is optional and has been moved to a normative annex (in this part of ISO 75). This annex and all other references to edgewise testing will be deleted on occasion of the next revisi
37、on of this document. Earlier editions of this International Standard allowed methods other than using a heating bath for heating the test specimen, namely forced-circulation ovens or fluidized beds. None of these alternative methods is widely used and no proven instruments are commercially available
38、. Furthermore, there is no general comparability between tests using different heating methods due to the differences in the heat transfer characteristics and the temperature control methods described in this standard. Therefore only heating in heating baths is allowed in this edition. In order to m
39、aintain consistency with ISO 10350-1:1998, Tf has been used as the symbol for temperature of deflection under load. EN ISO 752:2004 blank 4002:257 OSI NE INTENRATIONAL TSANDADR IS-57 O2:(4002)E I SO 4002 All irthgs ersedevr1 Plastics Determination of temperature of deflection under load Part 2: Plas
40、tics and ebonite 1 Scope This part of ISO 75 specifies three methods, using different values of constant flexural stress, that can be 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
41、, prior to processing, is up to 7,5 mm) and ebonite: ? method A, using a flexural stress of 1,80 MPa; ? method B, using a flexural stress of 0,45 MPa; ? method C, using a flexural stress of 8,00 MPa. The standard deflection ?s used to determine the temperature of deflection under load corresponds to
42、 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 temperature is neither specified nor measured in this part of ISO 75. The ratio of this flexural-strain difference to the initial flexural strain depends on the modu
43、lus of elasticity, at room temperature, of the material under test. This method is therefore only suitable for comparing the temperatures of deflection of materials with similar room- temperature elastic properties. NOTE The methods give better reproducibility with amorphous plastics than with semi-
44、crystalline ones. With some materials, it may be necessary to anneal the test specimens to obtain reliable results. Annealing procedures, if used, generally result in an increase in the temperature of deflection under load (see 6.6). For additional information, see ISO 75-1:2004, clause 1. 2 Normati
45、ve references The following referenced documents are indispensable for the application 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. ISO 75-1:2004, Plastics Determinati
46、on of temperature of deflection under load Part 1: General test method ISO 293, Plastics Compression moulding test specimens of thermoplastic materials ISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar
47、 test specimens ISO 2818, Plastics Preparation of test specimens by machining EN ISO 752:2004 IS-57 O2:(4002)E 2I SO 4002 All irthgs ersedevr ISO 3167, Plastics Multipurpose test specimens ISO 10724-1, Plastics Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) Pa
48、rt 1: General principles and moulding of multipurpose test specimens 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 75-1 apply. NOTE Depending on the selected value of the flexural stress (see clause 1), the temperature of deflection under load (see
49、 definition 3.7 in ISO 75-1:2004) is designated as Tfx 0,45, Tfx 1,8 or Tfx 8,0 (where x = f for flatwise testing and x = e for edgewise testing). 4 Principle See ISO 75-1:2004, clause 4. 5 Apparatus 5.1 Means of producing a flexural stress See ISO 75-1:2004, subclause 5.1. The span (distance between the lines of contact between specimen and supports) shall be (64 ? 1) mm for testing in the preferred (flatwise) position. See annex A for testing in the edgewise positio