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1、INTERNATIONAL STANDARD ISO 2898-2 Fourth edition 2008-11-01 Reference number ISO 2898-2:2008(E) ISO 2008 Plastics Plasticized poly(vinyl chloride) (PVC-P) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties Plastiques Matriaux base de poly(chlorure
2、de vinyle) plastifi (PVC-P) pour moulage et extrusion Partie 2: Prparation des prouvettes et dtermination des proprits Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction
3、or networking permitted without license from IHS -,-,- ISO 2898-2:2008(E) ii ISO 2008 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are
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6、 problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
7、including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Pu
8、blished in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 2898-2:2008(E) ISO 2008 All rights re
9、served iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards 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 fo
10、r which a technical committee has been established has the right to be represented on that committee. International 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
11、all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees ar
12、e 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. 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 r
13、esponsible for identifying any or all such patent rights. ISO 2898-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials. This fourth edition cancels and replaces the third edition (ISO 2898-2:1997), of which it constitutes a minor revision, the main p
14、urpose of which was to update the normative references. ISO 2898 consists of the following parts, under the general title Plastics Plasticized poly(vinyl chloride) (PVC-P) moulding and extrusion materials: Part 1: Designation system and basis for specifications Part 2: Preparation of test specimens
15、and determination of properties Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction or networking permitted without license from IHS -,-,- . iv Copyright International Org
16、anization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARDISO 2898-2:2008(E) ISO 2008 All rights reserved 1 Plastics Plasticize
17、d poly(vinyl chloride) (PVC-P) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties 1Scope This part of ISO 2898 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of PVC-P moulding an
18、d extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given. Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which t
19、hese specimens are made are given. Properties and test methods which are suitable and necessary to characterize PVC-P moulding and 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 sign
20、ificance to, these moulding and extrusion materials are also included in this part of ISO 2898, as are the designatory properties specified in ISO 2898-1. In order to obtain reproducible and comparable test results, it is necessary to use the methods of preparation and conditioning, the specimen dim
21、ensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures. 2Normative references The following referenced documents are indispensable for the application of th
22、is document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 176:2005, Plastics Determination of loss of plasticizers Activated carbon method ISO 291, Plastics Standard atmospheres for
23、 conditioning and testing ISO 293, Plastics Compression moulding of test specimens of thermoplastic materials ISO 458-2, Plastics Determination of stiffness in torsion of flexible materials Part 2: Application to plasticized compounds of homopolymers and copolymers of vinyl chloride ISO 527-2:1993,
24、Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 868, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) ISO 1183-1:2004, Plastics Methods for determining the density of non-cellular plastics
25、 Part 1: Immersion method, liquid pyknometer method and titration method ISO 2818, Plastics Preparation of test specimens by machining Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MST
26、No reproduction or networking permitted without license from IHS -,-,- ISO 2898-2:2008(E) 2 ISO 2008 All rights reserved ISO 2898-1, Plastics Plasticized poly(vinyl chloride) (PVC-P) moulding and extrusion materials Part 1: Designation system and basis for specifications ISO 3167:2002, Plastics Mult
27、ipurpose test specimens ISO 3451-5:2002, Plastics Determination of ash Part 5: Poly(vinyl chloride) ISO 10350-1, Plastics Acquisition and presentation of comparable single-point data Part 1: Moulding materials IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electri
28、cal insulating materials 3Preparation of test specimens 3.1General It is essential that specimens are always prepared by the same procedure (compression moulding), using the same processing conditions. The material shall be kept in moisture-proof containers until it is required for use. 3.2Treatment
29、 of the material before moulding Before processing, no pretreatment of the material sample is normally necessary. 3.3Compression moulding Before compression moulding, the material shall be plasticized using a two-roll mill under the conditions specified in Table 1. Sheet material from the mill shall
30、 be stacked, preferably with sheet orientation alternating from layer to layer, in the preheated mould. Compression-moulded sheets shall then be prepared in accordance with ISO 293, using the conditions specified in Table 2. Table 1 Conditions for milling of material before compression moulding Shor
31、e hardness of material Roll surface temperature Milling timea Roll surface speed Speed ratio Roll nip width Roll diameter Roll length Up to A 80130 to 160Approx. 5Approx. 101:1,2Approx. 1e.g. 150e.g. 300 D 35 to D 50145 to 170Approx. 5Approx. 101:1,2Approx. 1e.g. 150e.g. 300 Above D 50160 to 175Appr
32、ox. 5Approx. 101:1,2Approx. 1e.g. 150e.g. 300 a Measured from the moment when a sheet is formed. C minm/minmmmmmm Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction or ne
33、tworking permitted without license from IHS -,-,- ISO 2898-2:2008(E) ISO 2008 All rights reserved 3 The test specimens required for the determination of the properties shall be machined from the compression- moulded sheets in accordance with ISO 2818 or stamped. For additional details on test specim
34、en preparation, see Annex A. 4Conditioning of test specimens Test specimens for all determinations shall be conditioned in accordance with ISO 291 for at least at and relative humidity. 5Determination of properties In the determination of properties and the presentation of data, the standards, suppl
35、ementary instructions and notes given in ISO 10350-1 shall be applied. All tests shall be carried out in the standard atmosphere of and relative humidity unless specifically stated otherwise in Tables 3 and 4. Table 3 is compiled from ISO 10350-1, and the properties listed are those which are approp
36、riate to PVC-P moulding and extrusion materials. These properties are those considered useful for comparisons of data generated for different thermoplastics. Table 4 contains those properties, not found specifically in Table 3, which are in wide use or of particular significance in the practical cha
37、racterization of PVC-P moulding and extrusion materials. Table 2 Conditions for compression moulding of test specimens Shore hardness of material Moulding temperature Average cooling rate Demoulding temperature Full pressure Full-pressure time Preheating pressure Preheating time Up to A 80135 to 165
38、Not definedApprox. 40a2 to 102 to 5Approx. 0,3Max. 5 D 35 to D 50145 to 175Not definedApprox. 40a2 to 102 to 5Approx. 0,3Max. 5 Above D 50170 to 180Not definedApprox. 40a2 to 102 to 5Approx. 0,3Max. 5 a Very soft materials may require a lower temperature. Table 3 General properties and test conditio
39、ns (selected from ISO 10350-1) PropertyUnitStandard Specimen type (dimensions in mm) Test conditions and supplementary instructions Mechanical properties Tensile stress at strain MPaISO 527-2 ISO 3167:2002 type A specimen Test speed Distance between gauge marks Electrical properties Volume resistivi
40、tyIEC 60093 Voltage Other properties DensityaISO 1183-1:2004At least Method A or B Report the result to two decimal places a Designatory property. CC/minC MPaminMPamin 48 h 23 C 2 C (5010) % 23 C 2 C (5010) % 50 %50 mm/min 70 mm m?80 ?801100 V kg/m31 g Copyright International Organization for Standa
41、rdization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 2898-2:2008(E) 4 ISO 2008 All rights reserved Table 4 Additional properties and test conditions of particul
42、ar utility to PVC-P moulding and extrusion materials PropertyUnitStandardSpecimen type Test conditions and supplementary instructions Mechanical properties Tensile stress at elongation MPaISO 527-2:1993 Type 1BA specimen Thickness Test speed Shore A or D hardnessaISO 868 Disc of diameter or square s
43、pecimen Thickness or (type A: only) Force applied to specimen Take reading after Use Shore D if Shore A hardness Thermal properties Torsional stiffness as a function of temperaturea ISO 458-2 For very flexible compounds, use a specimen at high temperatures of test. The values of the torsional stiffn
44、ess are plotted as a function of temperature. The two temperatures at which the stiffness in torsion has values of and are TST 300 and TST 4,1, respectively. For ISO 2898-1, . Other properties Sulfated ash (by mass) ISO 3451-5:2002 PelletsMethod B Loss of plasticizers (by mass) ISO 176:2005 Disc of
45、diameter and thickness Method B a Designatory property. 100 % 2 mm 500 mm/min 50 mm 50 mm50 mm 4 mm6 mm 6 mm 50 N 15 s1 s 85 C 60 mm60 mm2 mm 60 mm60 mm4 mm 300 MPa4,1 MPa TST=300 % %50 mm 1 mm Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=B
46、oeing Co/5910770001 Not for Resale, 01/31/2009 05:28:11 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 2898-2:2008(E) ISO 2008 All rights reserved 5 Annex A (normative) Detailed description of the preparation of test specimens A.1Principle A rough sheet of the material
47、 to be tested is prepared using a heated two-roll mill. This sheet is then compression moulded into sheets of uniform thickness. Test specimens are prepared from the moulded sheets by machining or die-cutting. A.2Preparation of preliminary sheets A.2.1Apparatus A.2.1.1Two-roll mixing mill, capable o
48、f operating satisfactorily at temperatures up to and including . The rolls shall be cylindrical; the dimensions may be, for example: diameter , length . A.2.2Milling conditions A.2.2.1The surface temperature of the mill rolls and the moulding temperature used subsequently (see A.3.3) shall be based on the Shore hardness value of the material. The temperature of the rolls shall be selected to permit the materia