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1、BRITISH STANDARD BS EN 13421:2006 Plastics Thermoset moulding compounds Composites and reinforcement fibres Preparation of specimens for determining the anisotropy of the properties of compression moulding composites The European Standard EN 13421:2006 has the status of a British Standard ICS 83.120
2、 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13421:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI ISBN 0 580 48012 7 National foreword This British
3、 Standard is the official English language version of EN 13421:2006. The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs, which has the responsibility to: A list of organizations represented on this committee can b
4、e obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” fac
5、ility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligatio
6、ns. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages
7、This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Co
8、py: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13421 February 2006 ICS 83.120 English Version Plastics - Thermoset moulding compounds - Composites and reinforcement fibres - Preparation of specimens
9、 for determining the anisotropy of the properties of compression moulding composites Plastiques - Compositions de moulage thermodurs - Composites et fibres de renfort - Prparation des prouvettes pour dterminer lanisotropie des proprits des composites de moulage par compression Kunststoffe - Duroplas
10、t-Formmassen - Verbundwerkstoffe und Verstrkungsfasern - Herstellung von Probekrpern zur Bestimmung der Anisotropie der Eigenschaften von verpressten Formmassen This European Standard was approved by CEN on 30 December 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
11、hich stipulate the conditions 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 Central Secretariat or to any CEN member. This European S
12、tandard exists 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 Central Secretariat has the same status as the official versions. CEN members are the national s
13、tandards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
14、EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13421:2006: E Licensed
15、Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 2 Contents Page Foreword. 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions. 5 4 Health and safety. 5 5 Principle 6 6 Plate dimensions. 6 7 Procedure. 6 8 Man
16、ufacturing report 6 9 Precision. 6 Bibliography. 8 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 3 Foreword This European Standard (EN 13421:2006) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the secret
17、ariat of which is held by IBN/BIN. 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 August 2006, and conflicting national standards shall be withdrawn at the latest by August 2006. According to the
18、 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembo
19、urg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 4 Introduction The main advantage of fibre reinf
20、orced moulding composite like SMC/BMC and GMT/LFT is their ability to carry even longer reinforcing fibres to all parts of the mould during compression moulding. This material flow causes fibre orientation in the moulding and as a consequence an anisotropy of the properties. To provide engineers wit
21、h suitable data for designing new mouldings the knowledge of the anisotropy received under defined moulding conditions is essential. In practice the mould coverage of those composites is in the range of 25 % to 30 % therefore the necessary test plates for preparing test specimens by machining needs
22、to be manufactured under comparable conditions. For both composites this supposition is fulfilled in their European Standards for the preparation of test plates to determine flowability. Therefore these test plates can also be used for the preparation of specimens for determining the anisotropy of t
23、he composites to be tested. No special procedure to manufacture test plates has to be given in this European Standard. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 5 1 Scope This European Standard specifies a method for
24、the preparation of specimens of compression moulding composites for determining the anisotropy induced by material flow. It is applicable to all SMC/BMC and GMT/LFT composites, which are being moulded under defined moulding conditions as described in EN ISO 12115 and ISO 1268-9. 2 Normative referenc
25、es The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 472:2001, Plastics - Vocabular
26、y (ISO 472:1999) EN ISO 527-4, Plastics Determination of tensile properties Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites (ISO 527-4:1997) EN ISO 2818, Plastics Preparation of test specimens by machining (ISO 2818:1994) 3 Terms and definitions For the purp
27、oses of this European Standard, the terms and definitions given in EN ISO 472:2001 and the following apply. 3.1 Sheet Moulding Compound - SMC product composed of thoroughly mixed resins and chopped or un-chopped reinforcing fibres, with or without particulate fillers, produced in sheet form 3.2 Bulk
28、 Moulding Compound - BMC product composed of thoroughly mixed resins and chopped reinforcing fibres, with or without particulate fillers, supplied in mass form 3.3 GMT/STC compounds of glass mat reinforced thermoplastics 3.4 LFT compounds of glass reinforced thermoplastics by direct moulding 3.5 flo
29、w induced anisotropy isotropy caused by material flow of fibre reinforced compounds during moulding 4 Health and safety This European Standard limits itself to describing the preparation of compression moulded test plates. The handling conditions of the products and materials used shall comply with
30、the national regulations in force in each country and the staff shall be informed of the risks involved and appropriate precautions taken. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 6 5 Principle To receive comparable
31、data the specimens are being machined out of the flow areas of test plates which been manufactured under defined moulding conditions (see EN ISO 12115, ISO 1268-9 and Figure 1). NOTE Details of preparing the composites, loading the mould and applying the moulding conditions are given in the respecti
32、ve standards. They are different for both composites except the mould coverage. 6 Plate dimensions It is recommended to compression mould a plate of about 200 mm 590 mm (see also method II in EN ISO 12115). 7 Procedure 7.1 Follow the recommendations given in EN ISO 2818. 7.2 Cut the test specimens p
33、arallel to the flow direction out of the flow area A of the test plate (see Figure 2). 7.3 Before machining the specimens perpendicular to the flow direction (flow area B) 50 mm of the end of the test plate shall be cut off because of misalignment of fibres at the end of the test plate. NOTE Normall
34、y 5 tests are carried out to determine the tensile properties. For better statistical safety it is recommended and should agree upon between user and supplier to manufacture 3 test plates of each composites to be tested. 7.4 Check if all test specimens are free of failures which may effect the furth
35、er test procedure (e.g. surface fissures, high void content, local delaminations etc.) 8 Manufacturing report The report shall include the following information: a) reference to this European Standard, i.e. EN 13421; b) complete identification of the test plate used as given in their respective EN s
36、tandard test report; c) date of preparing the specimens; d) dimensions of the specimens; e) number of test specimens for both flow directions; f) statement as to whether any test specimens have been rejected and, if so, the reasons; g) any details not specified in this European Standard which may ha
37、ve an influence on the further test results. 9 Precision The precision of the machining of the test specimens depends on the accuracy of the respective cutting procedure. It has to fulfil the requirements for specimens used to determine the tensile properties according to EN ISO 527-4. Therefore no
38、special advice is given here. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 7 Key 1 mould coverage Figure 1 Mould coverage (25 % to 30 % of the total area) Key 1 cut off 2 flow area B 3 flow area A Figure 2 Flow areas of
39、the test plate Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13421:2006 (E) 8 Bibliography 1 EN ISO 291, Plastics Standard atmospheres for conditioning and testing (ISO 291:2005) 2 EN ISO 12115, Fibre-reinforced plastics Thermosetting m
40、oulding compounds and prepregs Determination of flowability, maturation and shelf life (ISO 12115:1997) 3 ISO 1268-9, Fibre-reinforced plastics Methods of producing test plates Part 9: Moulding of GMT/STC 4 ISO 8605, Textile-glass-reinforced plastics Sheet moulding compound (SMC) Basis for a specifi
41、cation Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:38:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13421:2006 BSI 389 Chiswick High Road London W4 4AL BSI British Sta
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