IEC 60811-511-2012 Electric and optical fibre cables - Test methods for non-metallic materials - Part 511 Mechanical tests - Measurement of the melt flow index .pdf

1、 IEC 60811-511 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 511: Mechanical tests Measurement of the melt flow index of polyethylene compounds Cbles lectriques et fibres optiques Mthodes dessai pour les

2、 matriaux non-mtalliques Partie 511: Essais mcaniques Mesure de lindice de fluidit chaud des mlanges polythylne IEC60811-511:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reprod

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16、ette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60811-511 Edition 1.0 2012-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric and optical fibre cables Test methods for non-metallic materials Part 511: Mechanical tests Measurement of the melt flow index of polyethyl

17、ene compounds Cbles lectriques et fibres optiques Mthodes dessai pour les matriaux non-mtalliques Partie 511: Essais mcaniques Mesure de lindice de fluidit chaud des mlanges polythylne INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 29.035.01; 29.060.20 PRI

18、CE CODE CODE PRIX ISBN 978-2-88912-988-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous

19、 avez obtenu cette publication via un distributeur agr. 2 60811-511 IEC:2012 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 General . 6 4.2 Apparatus 7 4.3 Test samples . 9 4.4 Cleaning and maintenance of the apparatus

20、9 4.5 Method A . 10 4.5.1 General . 10 4.5.2 Test procedure 10 4.5.3 Expression of results . 10 4.6 Method B . 11 4.7 Method C 11 4.7.1 General . 11 4.7.2 Test procedure 11 4.7.3 Expression of results . 11 5 Test report 11 Bibliography 12 Figure 1 Apparatus for determining melt flow index 8 Figure 2

21、 Die . 9 Table 1 Definition of types of polyethylene . 6 Table 2 Time intervals (as a function of melt flow index) used in obtaining cut-offs and mass of the charge put into the cylinder for methods A and C 11 60811-511 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC AND OPTICAL FIBR

22、E CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 511: Mechanical tests Measurement of the melt flow index of polyethylene compounds FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees

23、 (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Repo

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25、on-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements

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31、r damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. U

32、se of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent

33、 rights. International Standard IEC 60811-511 has been prepared by IEC technical committee 20: Electric cables. This Part 511 of IEC 60811 cancels and replaces Clause 10 of IEC 60811-4-1:2004, which is withdrawn. Full details of the replacements are shown in Annex A of IEC 60811-100:2012. There are

34、no specific technical changes with respect to the previous edition, but see the Foreword to IEC 60811-100:2012. 4 60811-511 IEC:2012 The text of this standard is based on the following documents: FDIS Report on voting 20/1307/FDIS 20/1356/RVD Full information on the voting for the approval of this s

35、tandard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This part of IEC 60811 shall be used in conjunction with IEC 60811-100. A list of all the parts in the IEC 60811 series, published under the

36、 general title Electric and optical fibre cables Test methods for non-metallic materials, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the

37、 data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60811-511 IEC:2012 5 INTRODUCTION The IEC 60811 series specifies the test methods to be used for testing non-metallic materials of all types of cables.

38、These test methods are intended to be referenced in standards for cable construction and for cable materials. NOTE 1 Non-metallic materials are typically used for insulating, sheathing, bedding, filling or taping within cables. NOTE 2 These test methods are accepted as basic and fundamental and have

39、 been developed and used over many years principally for the materials in all energy cables. They have also been widely accepted and used for other cables, in particular optical fibre cables, communication and control cables and cables for ships and offshore applications. 6 60811-511 IEC:2012 ELECTR

40、IC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 511: Mechanical tests Measurement of the melt flow index of polyethylene compounds 1 Scope This Part 511 of IEC 60811 describes the procedure for the measurement of the melt flow index for polyethylene compounds. 2 Normative re

41、ferences The 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, the latest edition of the referenced document (including any amendments) applies

42、. IEC 60811-100:2012, Electric and optical fibre cables Test methods for non-metallic materials Part 100: General IEC 60811-606, Electric and optical fibre cables Test methods for non-metallic materials- Part 606: Physical tests Methods for determining the density 3 Terms and definitions For the pur

43、poses of this document, the terms and definitions given in IEC 60811-100 apply. Additionally, for the purposes of this standard, a distinction is made between low-density, medium-density and high-density PE as shown in Table 1. Table 1 Definition of types of polyethylene Type of polyethylene Density

44、 at 23 C ag/cm3Low-density polyethylene 0,925 Medium-density polyethylene 0,925 0,940 High-density polyethylene 0,940 aThese densities refer to unfilled resins as determined by the method specified in IEC 60811-606. 4 Test method 4.1 General This part of IEC 60811 shall be used in conjunction with P

45、art 100: General All the tests shall be carried out not less than 16 h after the extrusion of the insulating or sheathing compounds. 60811-511 IEC:2012 7 The melt flow index (MFI) of polyethylene and polyethylene compounds is the quantity of material extruded in 1,5 min or 10 min at 190 C through a

46、specified die under the action of a load determined by the method used. NOTE 1 The same method is also specified in ISO 1133. NOTE 2 The melt flow index is not applicable to flame retarding polyethylene. Flame retardant PE is defined as PE containing additives intended to reduce flame propagation. 4

47、.2 Apparatus The apparatus consists basically of an extrusion plastometer, the general design being as shown in Figure 1. The compound, which is contained in a vertical cylinder, is extruded through a die by a loaded piston under controlled temperature conditions. All surfaces of the apparatus in co

48、ntact with the material under test shall have a high polish. The apparatus consists of the following parts: a) Steel cylinder A steel cylinder fixed in a vertical position and thermally insulated for operation at 190 C. The cylinder shall be at least 115 mm long with an internal diameter of between

49、9,5 mm and 10 mm and complying with the requirements in item b) below. The base of the cylinder shall be thermally insulated if the area of the exposed metal exceeds 4 cm2and it is recommended that the insulating material used be polytetrafluoroethylene (thickness about 3 mm) in order to avoid the extruded material from sticking. b) Steel hollow piston A steel hollow pist