1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 7792-2:2012Plastics Thermoplastic polyester (TP) moulding and extrusion materialsPart 2: Preparation of test specimens and determination of propertiesCopyright European
2、 Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 7792-2:2012. It supersedes BS EN ISO
3、 7792-2:2004, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e P R I / 8 2 , T h e r m o p l a s t i c m a t e r i a l s .A list of organizations represented on this committee can be obtained on request to its secretary.This publication
4、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 65080 2 ICS 83.080.20 Compliance with a British Standard cannot confer immunity fr
5、om legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2012.Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Standardization Provided by IHS under license with CENNot fo
6、r ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7792-2 December 2012 ICS 83.080.20 Supersedes EN ISO 7792-2:2004English Version Plastics - Thermoplastic polyester (TP) moulding and extrusion materials - Part 2: Pre
7、paration of test specimens and determination of properties (ISO 7792-2:2012) Plastiques - Polyesters thermoplastiques (TP) pour moulage et extrusion - Partie 2: Prparation des prouvettes et dtermination des proprits (ISO 7792-2:2012) Kunststoffe - Thermoplastische Polyester (TP)-Formmassen - Teil 2:
8、 Herstellung von Probekrpern und Bestimmung von Eigenschaften (ISO 7792-2:2012) This European Standard was approved by CEN on 24 November 2012. 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 n
9、ational 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 versions (English, French, German). A
10、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 Austria, Belgium, Bulgaria, Croatia, Cypru
11、s, 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, Turkey and United King
12、dom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7792-2:2012: EC
13、opyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012 EN ISO 7792-2:2012 (E) 3 Foreword This document (EN ISO 7792-2:2012) has been prepared by Technical Committee
14、 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 June 2013, and confli
15、cting national standards shall be withdrawn at the latest by June 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 patent rights. This document
16、supersedes EN ISO 7792-2:2004. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Rep
17、ublic 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 ISO 7792-2:2012 has been
18、approved by CEN as a EN ISO 7792-2:2012 without any modification. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012ISO 7792-2:2012(E) ISO 2012 All rights rese
19、rved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Preparation of test specimens 23.1 General . 23.2 Treatment of the material before moulding 23.3 Injection moulding . 34 Conditioning of test specimens . 35 Determination of properties 3Copyright European Committee for Standardizat
20、ion Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012ISO 7792-2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodi
21、es). The work 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
22、non-governmental, 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, Pa
23、rt 2.The main 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
24、 a vote.Attention 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 7792-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermop
25、lastic materials.This third edition cancels and replaces the second edition (ISO 7792-2:1997), which has been technically revised.ISO 7792 consists of the following parts, under the general title Plastics Thermoplastic polyesters: Part 1: Designation system and basis for specifications Part 2: Prepa
26、ration of test specimens and determination of propertiesiv ISO 2012 All rights reservedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012INTERNATIONAL STANDARD
27、 ISO 7792-2:2012(E)Plastics Thermoplastic polyester (TP) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties1 ScopeThis part of ISO 7792 specifies the methods of preparation of test specimens and the standard test methods to be used in determining t
28、he properties of thermoplastic polyester moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given here.Procedures and conditions for the preparation of test specimens in a specifie
29、d state and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize thermoplastic polyester moulding and extrusion materials are listed.The properties have been selected from the
30、general test methods in ISO 10350-1. Other test methods in wide use, for or of particular significance to these moulding and extrusion materials, are also included in this part of ISO 7792, as are the designatory properties specified in part 1 (viscosity number and tensile modulus of elasticity).In
31、order to obtain reproducible and comparable test results, it is necessary to use the methods of specimen preparation and conditioning, the specimen dimensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using specimens of different
32、dimensions or prepared using different procedures.2 Normative referencesThe 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 an
33、y amendments) applies.ISO 62, Plastics Determination of water absorptionISO 75-2, Plastics Determination of temperature of deflection under load Part 2: Plastics and eboniteISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact testISO 291, Plastics Standard at
34、mospheres for conditioning and testingISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimensISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and ex
35、trusion plasticsISO 1133-2, Plastics Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics Part 2: Method for materials sensitive to time-temperature history and/or moistureISO 1183-1, Plastics Methods for determining the density of non-cellular plastics Pa
36、rt 1: Immersion method, liquid pyknometer method and titration method ISO 2012 All rights reserved 1Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012ISO 7792-
37、2:2012(E)ISO 1183-2, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column methodISO 1183-3, Plastics Methods for determining the density of non-cellular plastics Part 3: Gas pyknometer methodISO 1628-5, Plastics Determination of the viscosity of polym
38、ers in dilute solution using capillary viscometers Part 5: Thermoplastic polyester (TP) homopolymers and copolymersISO 3167, Plastics Multipurpose test specimensISO 3451-2, Plastics Determination of ash Part 2: Poly(alkylene terephthalate) materialsISO 4589-2, Plastics Determination of burning behav
39、iour by oxygen index Part 2: Ambient-temperature testISO 10350-1, Plastics Acquisition and presentation of comparable single-point data Part 1: Moulding materialsISO 11357-2, Plastics Differential scanning calorimetry (DSC) Part 2: Determination of glass transition temperature and glass transition s
40、tep heightISO 11357-3, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature and enthalpy of melting and crystallizationISO 11359-2, Plastics Thermomechanical analysis (TMA) Part 2: Determination of coefficient of linear thermal expansion and glass transition temperat
41、ureIEC 60093, Solid electrical insulating materials Method of test for volume resistivity and surface resistivityIEC 60112, Method for the determination of the proof and the comparative tracking indices of solid insulating materialsIEC 60243-1, Electrical strength of insulating materials Test method
42、s Part 1:Tests at power frequenciesIEC 60250, Recommended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulating materials at power, audio and radio frequencies including metre wavelengthsIEC 60296, Fluids for electrotechnical applications Unused
43、 mineral insulating oils for transformers and switchgearIEC 60695-11-10, Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test methods3 Preparation of test specimens3.1 GeneralThe test specimens shall be prepared by injection moulding. It is essential that specimens are
44、 always prepared by the same procedure, using the same processing conditions.The material shall be kept in moisture-proof containers until it is required for use.Moisture content of filled or reinforced materials shall be expressed as a percentage of the total mass of the compound.3.2 Treatment of t
45、he material before mouldingBefore processing, the moisture content of the material sample shall not exceed 0,02 % (m/m). In the case of filled materials, this limit refers to the total mass of thermoplastic and filler.2 ISO 2012 All rights reservedCopyright European Committee for Standardization Pro
46、vided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 7792-2:2012ISO 7792-2:2012(E)To ensure that the moisture content remains low, it is recommended that the sample material in the feed hopper of the injection-moulding machin
47、e be blanketed with any suitable gas (dried air, nitrogen or argon, for example). Better results may be obtained using a dehumidifier hopper dryer.3.3 Injection mouldingInjection-moulded specimens shall be prepared in accordance with ISO 294-1, using the conditions specified in Table 1.Table 1 Condi
48、tions for injection moulding of test specimensMaterialMelt temperatureMould temperatureAverage injection velocityHold pressure timeTotal cycle timeC C mm/s s sPBT, unfilled, semi-crystalline 260 80 200 100 20 5 40 5PBT, unfilled, semi-crystalline, impact-modified and/or flame-retarded250 80 200 100 20 5 40 5PBT, filled, semi-crystalline 260 80 200 100 20 5 40 5PBT, filled, semi-crystalline, impact-modified and/or flame-retarded250 80 200 100 20 5 40 5PET, unfilled, amorphous 285 20 200 100 20 5 40 5PET, fill
