1、BRITISH STANDARD AEROSPACE SERIES BS EN 2332:1993 Textile glass fibre preimpregnates Test method for the determination of the resin flow The European Standard EN 2332:1993 has the status of a British Standard UDC 677.521.074.077.62:620.1:543.7:629.7BSEN2332:1993 This British Standard, having been pr
2、epared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15 May 1993 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/64 Draft for comment 91/78899 DC ISB
3、N 0 580 22142 3 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de nor
4、malisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Autho
5、rity of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Stand
6、ardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2332:1993 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Forewor
7、d 2 Text of EN 2332 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN2332:1993 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Polic
8、y Committee and is the English language version of EN2332:1993 Aerospace series Textile glass fibre preimpregnates Test method for the determination of the resin flow published by the European Committee for Standardization (CEN). EN 2332 was produced as a result of international discussion in which
9、the United Kingdom took an active part. NOTETextual errors. The French and German titles have been incorrectly translated. In the French title “Preimprgns de verre textile” has been corrected to read “Preimprgns de fibres de verre textile”. In the German title “Prmethode” has been corrected to read
10、“Prfmethode”. These corrections to the text have been reported to CEN. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer imm
11、unity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be in
12、dicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2332 March 1993 UDC 677.521.074.077.62:620.1:543.7:629.7 Descriptors: Aircraft industry, glass-cloth, plastics, preimpregnated products, tests, determination, resins, flows English version A
13、erospace series Textile glass fibre preimpregnates Test method for the determination of the resin flow Srie arospatiale Primprgns de fibres de verre textile Mthode dessai pour la dtermination de lcoulement de rsine Luft- und Raumfahrt Glasfilament- Prepreg Prfmethode zur Bestimmung des Harzflusses T
14、his European Standard was approved by CEN on 1993-03-01. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical reference
15、s concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard 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 i
16、ts own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switz
17、erland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 2332:1993 EEN2332:1993 BSI 12-1999 2 Foreword This European
18、Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this standard has successively received the approval of the National Associations and the Official Services of the member
19、 countries of AECMA, prior to its presentation to CEN. 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 September 1993, and conflicting national standards shall be withdrawn at the latest by Septem
20、ber1993. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Ki
21、ngdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Principle 3 5 Apparatus 3 6 Atmosphere for conditioning and testing 3 7 Sampling and specimens 4 8 Procedure 4 9 Calculation and expression of results 4 10 Test report 5 Figure 1 Example of positioning of plies for
22、a specimen on woven textile glass fibre fabric sample across the width 5 Figure 2 Example of positioning of plies for a specimen on woven textile glass fibre fabric sample along an axis inclined at an angle ! as close as possible to the weft direction 6 Figure 3 Example of positioning of plies for a
23、 specimen on textile glass fibre unidirectional sheet or tape sample 6EN2332:1993 BSI 12-1999 3 1 Scope 1.1 This standard specifies a method for determining the resin flow of a textile glass fibre fabric preimpregnate, for aerospace use. 1.2 This standard does not give any directives necessary to me
24、et the health and safety requirements. It is the responsibility of the user of this standard to adopt appropriate health and safety precautions. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references ar
25、e cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest e
26、dition of the publication referred to applies. EN 2330, Aerospace series Textile glass fibre preimpregnates Test method for the determination of the content of volatile matter. EN 2743, Aerospace series Reinforced plastics Standard procedures for conditioning prior to testing 1) . 3 Definitions A te
27、xtile glass fibre preimpregnate with a thermosetting or thermoplastic resin is a material in the form of a synthetic resin impregnated textile glass fibre unidirectional sheet, tape or woven fabric and used for the manufacture of moulded components. 4 Principle Flow of the resin from a weighed test
28、specimen under agreed conditions of temperature and pressure. 5 Apparatus 5.1 Balance with an accuracy of0,1mg 5.2 Template of standard specimen 5.3 Ancillary items such as sharp cutting knife and tweezers 5.4 Any mechanical device capable of maintaining the agreed temperature with an accuracy of 5
29、C and the agreed pressure with an accuracy of 5% 5.5 Metal plates not less than200mm 200mm and approximately1,6mm thick 5.6 Laboratory timer 5.7 Auxiliary materials glass fabric, ca. six plies,200mm 200mm, style181or similar, perforated polyvinyl fluoride (PVF) film,0,1mm thickness,200mm 200mm, glas
30、s fabric coated with polytetrafluoroethylene (PTFE), ca. three plies,200mm 200mm. 5.8 Template or punch for cutting cured specimen 6 Atmosphere for conditioning and testing 6.1 Conditioning 6.1.1 Conditioning of material stored at ambient temperature For material stored at ambient temperature, the a
31、mount of material required for testing shall be sampled and conditioned in the test atmosphere (see6.2.1) for a minimum of2h, unless otherwise specified. 6.1.2 Conditioning of material stored below ambient temperature For material stored at temperatures lower than the ambient temperature, the materi
32、al, suitably packed in an airtight and solvent resistant bag to prevent moisture pick-up, shall be allowed to reach ambient temperature over a period of time according to the mass of the package. This time shall not be less than8h and the actual time shall be recorded in the report. When the materia
33、l has reached the ambient temperature, the amount required for testing shall be sampled and conditioned in the test atmosphere (see6.2.1) for a minimum of2h, unless otherwise specified. 1) Published as AECMA pre-standard at the date of publication of this standardEN2332:1993 4 BSI 12-1999 6.2 Testin
34、g 6.2.1 Atmosphere for testing The tests shall be carried out at temperature and relative humidity conditions in accordance with EN2743B. 6.2.2 Time interval between conditioning and testing After conditioning, the test shall be carried out within6h, unless otherwise specified, the specimen being ke
35、pt in the test atmosphere until the test is carried out. 7 Sampling and specimens 7.1 Specimen The specimen, of square shape, shall be made up of at least three plies of preimpregnate and shall have a total mass of at least12g. The dimension of the sides shall be (100 1) mm. The plies shall be assem
36、bled by crossing alternatively each layer: each fabric layer having its diagonals parallel to the warp yarns. each layer of unidirectional sheet or tape having one of its sides parallel to the fibre direction. Other dimensions of the specimen may be used, subject to agreement between the purchaser a
37、nd the supplier, but having a surface area of100cm 2with a tolerance of 2%. 7.2 Number and distribution of specimens At least two specimens shall be used. The plies from which these are made shall be evenly distributed and cut from the sample diagonally across the width or length, as shown inFigure
38、1 andFigure 2 for woven fabrics and inFigure 3 for unidirectional sheet or tape. 8 Procedure Cut the necessary number of plies from the preimpregnate under test, using the appropriate template. Remove the separating film(s) and carefully superimpose the preimpregnate plies, oriented alternately at 0
39、 /90 , to form a uniform pack and give a specimen of total mass within the range specified in7.1. Weigh the specimen to the nearest mg (m 0 ) and then assemble the pack in the mechanical device as follows, starting with the bottom layer: one layer PTFE coated glass fabric, three layers glass bleeder
40、 fabric, one layer perforated PVF film, specimen, one layer perforated PVF film, three layers glass bleeder fabric, one layer PTFE coated glass fabric. Locate the assembly between the heated platens of the mechanical device at the temperature (see note below) and apply pressure (see note below) with
41、in a maximum of10s, then maintain it for the specified period (see note below). NOTETemperature of the platens, pressure applied to the assembly and period of application are those as specified in the relevant material data sheet. Remove the laminate from the mechanical device. Remove the release fi
42、lm and bleeder fabric material. Condition the specimens in the test atmosphere (see6.2.1) to constant mass. Cut out a square of length (70 0,7)mm and width of (70 0,7)mm from the centre of the cured laminate and weigh this to the nearest mg (m 2 ). Subject to agreement between the purchaser and the
43、supplier, the option of a circle with a diameter of(50 1) mm may be substituted for the square. 9 Calculation and expression of results 9.1 Uncorrected resin flow (not corrected for volatiles) The uncorrected resin flow of the specimen, expressed as a percentage of the original mass, is calculated f
44、rom the formula: where: F 1 : the resin flow expressed as a percentage of the original mass, m 0 : the original mass of the specimen, in g, m 2 : the mass of the cut out cured square or circle, in g, s 1 : the area of the original specimen, in mm 2 , s 2 : the area of the cut out cured or circle, in
45、 mm 2 . Calculate the arithmetic mean of the values obtained for F 1 .EN2332:1993 BSI 12-1999 5 9.2 Corrected resin flow for volatiles The corrected resin flow of the specimen, expressed as a percentage of the original mass, is calculated from the formula: where: Calculate the arithmetic mean of the
46、 values obtained for F 2 . 10 Test report The test report shall include the following information: 10.1 Reference to the type of preimpregnate, with complete description, including prepreg batch number 10.2 Reference to this standard 10.3 Description of the sampling method 10.4 Number of specimens u
47、sed, if different from this standard 10.5 Dimensions of the specimens, number of plies used and original mass 10.6 Atmosphere used for conditioning and testing and actual time used for conditioning. 10.7 Curing temperature, pressure and time 10.8 Individual values 10.9 Arithmetic mean value of the r
48、esin flow, expressed as a percentage of the original mass 10.10 Observations on any circumstances liable to have influenced the results F 2 : the resin flow expressed as a percentage of the original mass, m 1 : m 0 : the original mass of the specimen, in g, V : the volatile content, determined by th
49、e method given in EN 2330, in %, m 2 : the mass of the cut out cured square or circle, in g, s 1 : the area of the original specimen, in mm 2 , s 2 : the area of the cut out cured square or circle, in mm 2 . Figure 1 Example of positioning of plies for a specimen on woven textile glass fibre fabric sample across the widthEN2332:1993 6 BSI 12-1999 Figure 2 Example of positioning of plies for a specimen on woven textile glass fibre fabric sample along an axis inclined at an
