1、BRITISH STANDARD BS EN ISO 295:2004 Incorporating Corrigendum No. 1 Plastics Compression moulding of test specimens of thermosetting materials The European Standard EN ISO 295:2004 has the status of a British Standard ICS 83.080.10 BS EN ISO 295:2004 This British Standard was published under the aut
2、hority of the Standards Policy and Strategy Committee on 25 February 2004 BSI 8 April 2004 ISBN 0 580 43493 1 National foreword This British Standard is the official English language version of EN ISO 295:2004. It is identical with ISO 295:2004. It supersedes BS EN ISO 295:1999 which is withdrawn. T
3、he 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 be obtained on request to its secretary. Cross-references The British S
4、tandards 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” facility of the BSI Electronic Catalogue or of British Standards Online.
5、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 obligations. aid enquirers to understand the text; present to the responsible i
6、nternational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the
7、EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 12, 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. Date Comments 15135 Cor
8、rigendum No. 1 8 April 2004 Correction to EN ISO foreword pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO295 February2004 ICS83.080.10 SupersedesENISO295:1998 Englishversion PlasticsCompressionmouldingoftestspecimensof thermosettingmaterials(ISO295:2004) PlastiquesMoulageparcompressiondespr
9、ouvettesen matiresthermodurcissables(ISO295:2004) KunststoffePressenvonProbekrpernaus duroplastischenWerkstoffen(ISO295:2004) ThisEuropeanStandardwasapprovedbyCENon16January2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standard
10、thestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra n
11、slation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lit
12、huania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyform
13、andbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO295:2004:EINESO92:5002(4E) 2 CORRECTED20040310 Foreword Thisdocument(ENISO295:2004)hasbeenpreparedbyTechnicalCommitteeISO/TC61 “Plastics“incollaborationwithTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatof whichisheldbyIBN. ThisE
14、uropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyAugust2004,andconflictingnational standardsshallbewithdrawnatthelatestbyAugust2004. ThisdocumentsupersedesENISO295:1998. AccordingtotheCEN/CENELECInternalRegulations,thenationals
15、tandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary, Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland, Portugal,Slovakia,Slovenia,Spain,Sweden
16、,SwitzerlandandUnitedKingdom. Endorsementnotice ThetextofISO295:2004hasbeenapprovedbyCENasENISO295:2004withoutany modifications. ENISO295:2004 Reference number ISO 295:2004(E)INTERNATIONAL ADNATSDR ISO 925 Ttide drihino -400210-20 Plastics Compression moulding of test specimens of thermosetting mate
17、rials Plastiques Moulage par compression des prouvettes en matires thermodurcissables Referecne unbmer OSI 2:5920)E(40INTERNATIONAL STANDARD ISO 295 Third edition 2004-02-01 scitsalP oCmoisserpn mluodign t fotse icepsht fo snemesomreittam gnslairet salPtiuqse uoMlgap era crpmosesino sed rpvuottese m
18、 neitarse rehtomrudcisslbase ENISO295:2004 ii ENISO295:2004 iiiContents Page Foreword iv 1 Scope 1 2 Normative references. 1 3 Terms and definitions. 2 4 Apparatus. 3 5 Conditioning of material prior to moulding 6 6 Preparation of the charge. 6 7 Moulding conditions. 7 7.1 General. 7 7.2 Drying. 8 7
19、.3 High-frequency preheating 8 7.4 Pre-plastification. 8 7.5 Release agents 8 7.6 Breathing 8 8 Procedure. 8 9 Precision 9 10 Moulding report. 9 Annex A (informative) Marking of test specimens 11 Bibliography . 12 ENISO295:2004iv Foreword ISO (the International Organization for Standardization) is a
20、 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 for which a technical committee has been established has the right to be represente
21、d 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 all matters of electrotechnical standardization. International Standards are draf
22、ted 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 are circulated to the member bodies for voting. Publication as an International Sta
23、ndard 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 responsible for identifying any or all such patent rights. ISO 295 was prepared by
24、 Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. This third edition cancels and replaces the second edition (ISO 295:1991), which has been technically revised. ENISO295:2004INTENRATIONAL TSANDADR IS:592 O4002(E)1Plastics Compression moulding of test specimens of
25、 thermosetting materials 1 Scope This International Standard establishes the general principles and lays down the procedure to prepare test specimens of heat- and pressure-moulded thermosetting material from different moulding compounds; specifies the details for test specimen preparation to be incl
26、uded with the test reports on properties; gives the general principles for the design of the mould intended for the preparation of the test specimens. The conditions required for preparing, in a reproducible manner, test specimens which will give comparable results are discussed relative to the subs
27、tance under consideration. The method applies to phenolic resin, aminoplastic, melamine/phenol, epoxy and unsaturated-polyester based thermosetting powder moulding compounds (PMCs). Due to the nature of certain moulding compounds, their flow properties or other variable factors, it may be necessary
28、to prepare the test specimens according to special methods. The latter are normally in an agreement between the interested parties and noted in the moulding report. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,
29、 only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 472:1999, Plastics Vocabulary ISO 1183:1987, Plastics Methods for determining the density and relative density of non-cellular plastics ISO 3167:2002, Plasti
30、cs Multipurpose test specimens ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters ISO 14526-1, Plastics Phenolic powder moulding compounds (PF-PMCs) Part 1: Designation system and basis for specifications ISO 14526-2,
31、Plastics Phenolic powder moulding compounds (PF-PMCs) Part 2: Preparation of test specimens and determination of properties ISO 14526-3, Plastics Phenolic powder moulding compounds (PF-PMCs) Part 3: Requirements for selected moulding compounds ISO 14527-1, Plastics Urea-formaldehyde and urea/melamin
32、e-formaldehyde powder moulding compounds (UF- and UF/MF-PMCs) Part 1: Designation and basis for specifications ENISO295:20042 ISO 14527-2, Plastics Urea-formaldehyde and urea/melamine-formaldehyde powder moulding compounds (UF- and UF/MF-PMCs) Part 2: Preparation of test specimens and determination
33、of properties ISO 14527-3, Plastics Urea-formaldehyde and urea/melamine-formaldehyde powder moulding compounds (UF- and UF/MF-PMCs) Part 3: Requirements for selected moulding compounds ISO 14528-1, Plastics Melamine-formaldehyde powder moulding compounds (MF-PMCs) Part 1: Designation system and basi
34、s for specifications ISO 14528-2, Plastics Melamine-formaldehyde powder moulding compounds (MF-PMCs) Part 2: Preparation of test specimens and determination of properties ISO 14528-3, Plastics Melamine-formaldehyde powder moulding compounds (MF-PMCs) Part 3: Requirements for selected moulding compou
35、nds ISO 14529-1, Plastics Melamine/phenolic powder moulding compounds (MP-PMCs) Part 1: Designation system and basis for specifications ISO 14529-2, Plastics Melamine/phenolic powder moulding compounds (MP-PMCs) Part 2: Preparation of test specimens and determination of properties ISO 14529-3, Plast
36、ics Melamine/phenolic powder moulding compounds (MP-PMCs) Part 3: Requirements for selected moulding compounds ISO 14530-1, Plastics Unsaturated-polyester powder moulding compounds (UP-PMCs) Part 1: Designation system and basis for specifications ISO 14530-2, Plastics Unsaturated-polyester powder mo
37、ulding compounds (UP-PMCs) Part 2: Preparation of test specimens and determination of properties ISO 14530-3, Plastics Unsaturated-polyester powder moulding compounds (UP-PMCs) Part 3: Requirements for selected moulding compounds ISO 15252-1, Plastics Epoxy powder moulding compounds (EP-PMCs) Part 1
38、: Designation system and basis for specifications ISO 15252-2, Plastics Epoxy powder moulding compounds (EP-PMCs) Part 2: Preparation of test specimens and determination of properties ISO 15252-3, Plastics Epoxy powder moulding compounds (EP-PMCs) Part 3: Requirements for selected moulding compounds
39、 3 Terms and definitions For the purposes of this document, the terms and definitions of ISO 472 and the following apply. 3.1 spatial temperature differences differences in temperature existing simultaneously at various points inside the mould after the temperature adjustment device has been set at
40、a given temperature and after a permanent thermal equilibrium has been reached 3.2 temporal temperature differences differences in temperature that may occur at a single given point on the inside of the mould at various times after the temperature adjustment device has been set at a given temperatur
41、e and after a permanent thermal equilibrium has been reached ENISO295:2004 33.3 crosslinking time or cure time time interval between the end of the mould-closing operation and the beginning of the mould-opening operation NOTE In practice, the cure time is generally counted as from the moment when th
42、e pressure reaches the specified value. 4 Apparatus 4.1 Compression mould, made of steel, able to withstand the prescribed moulding temperatures and pressures. The mould shall be designed so that the compression force is transmitted to the moulding material with no appreciable loss. It may be a sing
43、le-cavity or a multi-cavity type mould. Figure 1 shows an example of a single-cavity positive mould. The cavity of the mould may have the shape of the multi-purpose test specimen in accordance with ISO 3167. In some cases, e.g., for aminoplastic moulding materials, a semi-positive mould is more suit
44、able, even though the pressure on the moulding material is not as well defined. In this case, the test-specimen thickness shall be adjusted using spacers on the mould parting line. The mould cavity may have various forms, e.g., square plate, disc or multi-purpose specimen in accordance with ISO 3167
45、. For moulding powders, a “type E ISO 295” single-cavity mould with dimensions of 120 mm 120 mm is recommended. In the moulding report, the plate is designated as “type Eh ISO 295,” where h is the thickness in millimetres (e.g., “type E4 ISO 295” for a plate with a thickness of 4 mm and dimensions o
46、f 120 mm 120 mm). The majority of the test methods require a thickness of 4 mm but, for a few, for instance the measurement of certain electrical properties, thinner plates may be required. When in doubt, the dimensions specified in the test procedure itself shall be used. The use of a plate allows
47、the required test specimens to be cut by machining. The test specimens shall not be taken from the edge of the plate. A margin of 10 mm is recommended. The mould surface shall be free from superficial damage or contamination and have a roughness Ra between 0,4 m and 0,8 m, inclusive (see ISO 4287).
48、Chrome plating is not always necessary, but it can prevent sticking. The edge-taper angle, if any, shall not be greater than 3 (see Figure 1). Clearance between the vertical wall of the cavity and that of the punch shall not exceed 0,1 mm (see Figure 1). Dimension e shall be calculated so that there is no risk of the pun
