1、BSI Standards PublicationBS EN ISO 17855-2:2016Plastics Polyethylene (PE)moulding and extrusionmaterialsPart 2: Preparation of test specimens anddetermination of propertiesBS EN ISO 17855-2:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO17855-2:2016. It
2、 supersedes BS EN ISO 1872-2:2007 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/82, Thermoplastic materials.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to includ
3、e all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 87190 0ICS 83.080.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British
4、 Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17855-2 March 2016 ICS 83.080.20 Supersedes EN ISO 1872-2:2007
5、English Version Plastics - Polyethylene (PE) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (ISO 17855-2:2016) Plastiques - Polythylne (PE) pour moulage et extrusion - Partie 2: Prparation des prouvettes et dtermination des proprits (ISO 1785
6、5-2:2016) Kunststoffe - Polyethylen (PE)-Werkstoffe - Teil 2: Herstellung von Probekrpern und Bestimmung von Eigenschaften (ISO 17855-2:2016) This European Standard was approved by CEN on 15 January 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c
7、onditions for giving this 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 ex
8、ists 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 language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national s
9、tandards bodies of Austria, 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,
10、 Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means rese
11、rved worldwide for CEN national Members. Ref. No. EN ISO 17855-2:2016 EBS EN ISO 17855-2:2016EN ISO 17855-2:2016 (E) 3 European foreword This document (EN ISO 17855-2:2016) has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics” t
12、he 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 September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Atten
13、tion 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 supersedes EN ISO 1872-2:2007. According to the CEN-CENELEC Internal Regulati
14、ons, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
15、, 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 17855-2:2016 has been approved by CEN as EN ISO 17855-2:2016 without any modification. BS EN ISO 1
16、7855-2:2016ISO 17855-2:2016(E)Foreword iv1 Scope . 12 Normative references 13 Preparation of test specimens 33.1 General . 33.2 Treatment of the material before moulding 33.3 Injection moulding . 33.4 Compression moulding 34 Conditioning of test specimens . 45 Determination of properties 4Annex A (i
17、nformative) Interlaboratory trials for density: Immersion method in accordance with ISO 11831 8Bibliography 9 ISO 2016 All rights reserved iiiContents PageBS EN ISO 17855-2:2016ISO 17855-2:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national s
18、tandards bodies (ISO member bodies). 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
19、organizations, governmental and 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.The procedures used to develop this document and those intended for
20、its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/
21、directives).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. Details of any patent rights identified during the development of the document will be in
22、 the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions rel
23、ated to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic m
24、aterials.This first edition of ISO 17855-2 cancels and replaces ISO 1872-2:2007, which has been technically revised.ISO 17855 consists of the following parts, under the general title Plastics Polyethylene (PE) moulding and extrusion materials: Part 1: Designation system and basis for specifications
25、Part 2: Preparation of test specimens and determination of propertiesiv ISO 2016 All rights reservedBS EN ISO 17855-2:2016INTERNATIONAL STANDARD ISO 17855-2:2016(E)Plastics Polyethylene (PE) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties1 Scope
26、This part of ISO 17855 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of polyethylene (PE) moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and t
27、he specimens before testing are given.Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made are also given. Properties and test methods that are suitable and necessary to characterize PE moulding a
28、nd extrusion materials are listed.The properties have been selected from the 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 17855, as are the designatory properties
29、specified in ISO 17855-1.In order to obtain reproducible and comparable test results, it is necessary to use the methods of preparation and conditioning, the specimen dimensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using spec
30、imens of different dimensions or prepared using different procedures.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references
31、, the latest edition of the referenced document (including any amendments) applies.ISO 62, Plastics Determination of water absorptionISO 752, Plastics Determination of temperature of deflection under load Part 2: Plastics and eboniteISO 178, Plastics Determination of flexural propertiesISO 1791, Pla
32、stics Determination of Charpy impact properties Part 1: Non-instrumented impact testISO 1792, Plastics Determination of Charpy impact properties Part 2: Instrumented impact testISO 293, Plastics Compression moulding of test specimens of thermoplastic materialsISO 2941, Plastics Injection moulding of
33、 test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimensISO 2943, Plastics Injection moulding of test specimens of thermoplastic materials Part 3: Small platesISO 2944, Plastics Injection moulding of test specimens of thermoplastic ma
34、terials Part 4: Determination of moulding shrinkage ISO 2016 All rights reserved 1BS EN ISO 17855-2:2016ISO 17855-2:2016(E)ISO 5272, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plasticsISO 8991, Plastics Determination of creep behaviour Part 1: Ten
35、sile creepISO 11331, Plastics Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics Part 1: Standard methodISO 11831, Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, liquid pyknometer method and titration meth
36、odISO 11832, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column methodISO 11833, Plastics Methods for determining the density of non-cellular plastics Part 3: Gas pyknometer methodISO 16283, Plastics Determination of the viscosity of polymers in dil
37、ute solution using capillary viscometers Part 3: Polyethylenes and polypropylenesISO 2818, Plastics Preparation of test specimens by machiningISO 45892, Plastics Determination of burning behaviour by oxygen index Part 2: Ambient-temperature testISO 66032, Plastics Determination of puncture impact be
38、haviour of rigid plastics Part 2: Instrumented impact testingISO 8256, Plastics Determination of tensile-impact strengthISO 103501, Plastics Acquisition and presentation of comparable single-point data Part 1: Moulding materialsISO 113572, Plastics Differential scanning calorimetry (DSC) Part 2: Det
39、ermination of glass transition temperature and glass transition step heightISO 113573, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature and enthalpy of melting and crystallizationISO 113592, Plastics Thermomechanical analysis (TMA) Part 2: Determination of coeffi
40、cient of linear thermal expansion and glass transition temperatureISO 16770, Plastics Determination of environmental stress cracking (ESC) of polyethylene Full-notch creep test (FNCT)ISO 17855-1:2014, Plastics Polyethylene (PE) moulding and extrusion materials Part 1: Designation system and basis fo
41、r specificationsISO 20753, Plastics Test specimensIEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materialsIEC 60112, Method for the determination of the proof and the comparative tracking indices of solid insulating materialsIEC 602431, Elect
42、rical strength of insulating materials Test methods 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 602
43、96, Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgear2 ISO 2016 All rights reservedBS EN ISO 17855-2:2016ISO 17855-2:2016(E)IEC 606951110, Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test methodsASTM D638, Stand
44、ard test method for tensile properties of plasticsASTM D1693, Standard test method for environmental stress-cracking of ethylene plastics3 Preparation of test specimens3.1 GeneralIt is essential that specimens are always prepared by the same procedure (either injection moulding or compression mouldi
45、ng), using the same processing conditions.The procedure to be used for each test method is indicated in Table 3 and Table 4 (M = injection moulding, Q = compression moulding).3.2 Treatment of the material before mouldingNo pre-treatment of the material sample is normally necessary before moulding.3.
46、3 Injection mouldingInjection moulding of test specimens is used for PE moulding materials having a melt mass-flow rate (MFR) of 1 g/10 min, determined in accordance with ISO 1133-1 using set of test conditions D (190 C/2,16 kg) specified in ISO 17855-1.Injection-moulded specimens shall be prepared
47、in accordance with ISO 294-1 or ISO 294-3, using the conditions specified in Table 1. It has been found that bar test specimens prepared in accordance with ISO 20753 give better precision than those injection-moulded directly to their final dimensions and so the use of this geometry is preferable.An
48、 appropriate hold pressure, consistent with the production of blemish-free mouldings, shall be used.Table 1 Conditions for injection moulding of test specimensMaterialMelt temperatureMould temperatureAverage injection velocityCooling timeTotal cycle timeC C mm/s s sMFR 1 g/10 min 210 40 100 20 35 5
49、40 53.4 Compression mouldingCompression moulding is used for materials with a melt mass-flow rate of 10 %: test speed 50 mm/min.2.6 Stress at break B2.7 Strain at break B%2.8Tensile creep modulusEtc1ISO 899-1 MPaAt 1 hStrain 0,5 %2.9 Etc103At 1 000 h2.10 Flexural modulus EfISO 178 80 10 4 MPa Test speed 2 mm/min.2.11Charpy notched impact strengthcAISO 179-1orISO 179-280 10 4Machined V-notch,r = 0
