1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 5834-2:2011Implants for surgery Ultra-high-molecular-weightpolyethylenePart 2: Moulded formsBS ISO 5834-2:2011 BRITISH STANDARDNational forewordThis British Standard is th
2、e UK implementation of ISO 5834-2:2011. Itsupersedes BS ISO 5834-2:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CH/150/1, Materials for surgical implants.A list of organizations represented on this committee can beobtained on request to its secr
3、etary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 70215 0ICS 11.040.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publish
4、ed under the authority of theStandards Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate Text affectedBS ISO 5834-2:2011Implants for surgery Ultra-high-molecular-weight polyethylene Part 2: Moulded formsImplants chirurgicaux Polythylne trs haute masse molculaire
5、 Partie 2: Produits sous forme moule ISO 2011Reference numberISO 5834-2:2011(E)Fourth edition2011-08-01ISO5834-2INTERNATIONAL STANDARDBS ISO 5834-2:2011ISO 5834-2:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011All rights reserved. Unless otherwise specified, no part of this publication may be reproduce
6、d or utilized in any form or by any means, electronic or mechanical, 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 officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 1
7、1Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerlandii ISO 2011 All rights reservedBS ISO 5834-2:2011ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Inte
8、rnational 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-governmental, in liaison wi
9、th 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 main task of technical
10、 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.Attention is drawn to t
11、he 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 5834-2 was prepared by Technical Committee ISO/TC 150, Implants for surgery, Subcommittee SC 1, Materials.This fourth edi
12、tion cancels and replaces the third edition, which has been technically revised.ISO 5834 consists of the following parts, under the general title Implants for surgery Ultra-high-molecular-weight polyethylene: Part 1: Powder form Part 2: Moulded forms Part 3: Accelerated ageing methods Part 4: Oxidat
13、ion index measurement method Part 5: Morphology assessment methodISO 5834-2:2011(E) ISO 2011 All rights reserved iiiBS ISO 5834-2:2011BS ISO 5834-2:2011INTERNATIONAL STANDARD ISO 5834-2:2011(E)Implants for surgery Ultra-high-molecular-weight polyethylene Part 2: Moulded forms1 ScopeThis part of ISO
14、5834 specifies the requirements and corresponding test methods for moulded forms, e.g. sheets and rods, made from ultra-high-molecular-weight polyethylene (UHMWPE) for use in the manufacture of surgical implants.This part of ISO 5834 is not applicable to direct-moulded (near net shape), irradiated o
15、r finished products or products manufactured from polyethylene blended with additives or by blending different forms of polyethylene.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
16、For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 527-1, Plastics Determination of tensile properties Part 1: General principlesISO 1183-1:1), Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, li
17、quid pyknometer method and titration methodISO 3451-1:2008, Plastics Determination of ash Part 1: General methodsISO 5834-1, Implants for surgery Ultra-high-molecular-weight polyethylene Part 1: Powder formISO 11542-2:1998, Plastics Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and ext
18、rusion materials Part 2: Preparation of test specimens and determination of properties3 ClassificationThe material moulded from Type 1, Type 2 or Type 3 powder as defined in ISO 5834-1 shall be classified as Type 1, Type 2 or Type 3 respectively.4 MaterialThe moulded material shall be made from UHMW
19、PE powder in accordance with the requirements of ISO 5834-1.5 Manufacturing requirementsThe moulded material supplied for each order shall be identified by lot numbers.NOTE “Lot” refers to the material for which testing has been carried out and for which discrete records are kept.The material shall
20、be subjected to a stress-relief annealing process as agreed by the purchaser and the vendor.1) To be published (revision of ISO 1183-1:2004). ISO 2011 All rights reserved 1BS ISO 5834-2:2011In the moulding process, no liquid or powdery release agents shall be used (such as silicon or talc-based rele
21、ase agent) in order to avoid contamination, migration and moulding defects.6 Requirements6.1 Physical propertiesWhen measured using the appropriate test method, as defined in Table 1, the physical properties of the moulded material shall conform to the relevant values given in Table 1 for each type
22、of material.The physical properties shall be measured on material in the consolidated and annealed state before further processing. Subsequent manufacturing processes can influence the comparison of test results.6.2 Particulate matterWhen visually inspected using normal or corrected vision with no m
23、agnification, not more than ten particles shall be visible on the surface of a sample or samples prepared in accordance with 7.8.Table 1 Physical propertiesProperty UnitRequirement Type 1Requirement Type 2Requirement Type 3Test method according to subclauseDensity kg/m3927 to 944 927 to 944 927 to 9
24、44 7.2Ash, maximum mg/kg 150 150 300 7.3Tensile stress, y, at yield, minimumMPa 21 19 19 7.4Tensile stress, R, at break, minimumMPa 35 27 27 7.5Elongation at break, R, minimum% 300 300 250 7.6Double-notched impact strength, Charpy a, acN, minimumkJ/m2180 (126) b90 (73) 30 (25) 7.7 NOTE The minimum v
25、alues given in this table are for the mean of the results for the specimens tested. Individual test specimen results might be below this minimum.aEither the Charpy or Izod impact test specified in 7.7 may be performed. In cases of doubt or dispute, the test method specified in ISO 11542-2 (Charpy) s
26、hall be used as the reference method.bThe values in parentheses are determined in accordance with ASTM F648:2007 (Izod). 7 Test methodsCAUTION The UHMWPE powder and the semi-finished and finished products for this application are not equipped with light stabilizers and should therefore be protected
27、against the influence of ultraviolet radiation.7.1 Test conditionsUnless otherwise specified, the testing specified in 7.2 and 7.4 to 7.7 shall be conducted under standard conditions of (23 2) C after storage of the test specimen for at least 16 h under these conditions.7.2 DensityThe density shall
28、be measured by means of method A (immersion method) specified in ISO 1183-1, using at least three specimens. The mean of the results on the three test specimens shall not exceed the value given in Table 1.ISO 5834-2:2011(E)2 ISO 2011 All rights reservedBS ISO 5834-2:20117.3 AshThe ash shall be measu
29、red in accordance with ISO 3451-1:2008, method A, performing duplicate tests on each of two test specimens at (700 50) C. The mean of the results on the two test specimens shall be less than the value given in Table 1.7.4 Tensile stress at yieldThe tensile stress at yield, y, shall be determined by
30、the tensile test specified in ISO 527-1, using an extensometer to measure the strain and applying a test speed of (100 10) mm/min. At least five test specimens of thickness (1,5 0,5) mm shall be tested. The mean of the results on the five test specimens shall not be less than the values given in Tab
31、le 1.7.5 Tensile stress at breakThe tensile stress at break, R, shall be measured during the test described in 7.4. The mean of the results on the five test specimens shall not be less than the values given in Table 1.7.6 Elongation at breakThe elongation at break, R, shall be measured during the te
32、st described in 7.4. The mean of the results on the five test specimens shall not be less than the values given in Table 1.7.7 Notched impact strengthThe double-notched impact strength, acN, shall be determined by the impact test specified in either ISO 11542-2:1998, Annex B (Charpy) or ASTM F648:20
33、07 (Izod).In case of doubt or dispute, the test method specified in ISO 11542-2 shall be used as the reference method.7.8 Sample area for extraneous matterA total machined surface area of (500 103) mm2shall be taken from locations within the fabricated form. The area examined shall include both tran
34、sverse and longitudinal samples, or it may be produced by repeated sectioning through the thickness of the fabricated form.8 Identification markingEach item supplied shall be identified with at least a lot identification. A marking, which can also be a serial identification, with reference to the lo
35、t identification, may be repeated at intervals along the length of the item.9 Test certificateEach lot shall be supplied with a test certificate stating the results of the tests conducted and conformance with the requirements of this part of ISO 5834. The test certificate shall include the following
36、 information:a) reference to this part of ISO 5834, i.e. ISO 5834-2:2011;b) statement of material type, i.e. Type 1 or Type 2 or Type 3;c) lot number or serial number with reference to the lot number;d) number of items;e) test values in accordance with the appropriate clauses of this part of ISO 583
37、4;f) description of the UHMWPE annealing treatment as agreed by the purchaser and the vendor.ISO 5834-2:2011(E) ISO 2011 All rights reserved 3BS ISO 5834-2:201110 LabellingEach package of moulded material shall be clearly marked as agreed between the purchaser and vendor.ISO 5834-2:2011(E)4 ISO 2011
38、 All rights reservedBS ISO 5834-2:2011Bibliography1 ISO 11542-1, Plastics Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials Part 1: Designation system and basis for specifications2 ASTM F648:2007, Standard Specification for Ultra-High-Molecular-Weight Polyethylene P
39、owder and Fabricated Form for Surgical ImplantsISO 5834-2:2011(E) ISO 2011 All rights reserved 5BS ISO 5834-2:2011ISO 5834-2:2011(E)ICS 11.040.40Price based on 5 pages ISO 2011 All rights reservedThis page deliberately left blankBSI is the independent national body responsible for preparing British
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