1、*$ CEN EN*Z329 93 3404589 0042608 232 = EUROPEAN STANDARD NORME EUROPENNE EN 2329: 1993 EUROPISCHE NORM March 1993 UK 677.521.074.077.62:620.1:629.7 Descriptors: Aircraft industry, glass-doth, plastics, preimpregnated products, tests, determination, specific area English version Aerospace series - T
2、extile glass fibre preimpregnates - Test method for the determination of mass per unit area Srie arospatiale - Pdimprgns de fibres de vem textile - Mthode dessai pour la d&tennlnation de la masse superfacique Luft- und Raumfahrt - Glasfilament- Prepreg - Prfmethode zur ktinmung der flchenbezogenen M
3、asse Thls European Standard was approved by CEN on 1993-03-01. CEN members are bound to canply 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 ref
4、erences concerning such national standards may be obtained on application tu the Central Secretariat or to any CEN inember. The European Standards exist in three official versions (English, French. German). A version in any other language made by translation under the responsibility of a CEN manber
5、into its own lanquage 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, Noway, Portugal, Spain, Sweden.
6、Switzerland and United Kingdan. CEN European Gnnnittee for Standardization Canit Europen de Normalisation Europisches Kanitee fr Normung Central Secretariat: rue de Stassart,3 8-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 2329:1993 E CEN ENL2329 93 3404589 O042609 179 Page 2 EN
7、2329:1993 Contents list 1 2 3 4 5 6 7 9 10 a Scope Normative references Definitions Principle Apparatus Atmosphere for conditioning and testing Sampling and specimens Procedure Calculation and expression of results Test report Foreword This European Standard has been prepared by the European Associa
8、tion 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 countries of AECMA, prior to its presentation to
9、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 September 1993. According to the CENXENELEC Internal Reg
10、ulations, 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 Kingdom. CEN EN*Z329 93 3404589 0042630 990 Page 3
11、EN 2329:1993 1 Scope 1.1 preimpregnate, for aerospace use. This standard specifies a method for determining the mass per unit area of a textile glass fibre 1.2 is the responsibility of the user of this standard to adopt appropriate health and safety precautions. This standard does not give any direc
12、tives necessary to meet the health and safety requirements. lt 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed. her
13、eafter. 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 edition of the publication referred to applies. EN 2743 Aerospaceseries - Reinforc
14、ed plastics - Standard procedures for conditioning prior to testing 1) 3 Definitions A textile 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
15、the manufacture of moulded components. 4 Principle Weighing of specimens of known area after conditioning in a specified atmosphere. 5 Apparatus 5.1 5.2 Template of standard specimen 5.3 Balance with an accuracy of 0.1 mg Ancillary items such as sharp knife and tweezers 6 6.1 Conditioning 6.1.1 For
16、material stored at ambient temperature, the amount of material required for testing shall be sampled and conditioned in the test atmosphere (see 6.2.1) for a minimum of 2 h, unless otherwise specified. Atmosphere for conditioning and testing Conditioning of material stored at ambient temperature 1)
17、Published as AECMA pre-standard at the date of publication of this standard CEN ENa2329 93 3404589 O042633 827 W Page 4 EN 2329:1993 6.1.2 for material stored at temperatures lower than ambient temperature. the material, suitably packed in an airtight and solvent resistant bag to prevent moisture pi
18、ck-up. shall be allowed to reach ambient temperature over a period of time according to the massof the package. This time shall not be less than 8 h and the actual time shall be recorded in the report. When the material has reached the ambient temperature, the amount required for testing shall be sa
19、mpled and conditioned in the test atmosphere (see 6.2.1 1 for a minimum of 2 h, unless otherwise specified. Conditioning of material stored below ambient temperature 6.2 Testing 6.2.1 Atmosphere for testing The tests shall be carried out at temperature and relative humidity conditions in accordance
20、with EN2743B. 6.2.2 Unlessotherwise specified, the test shall be carried out within 6 h, after conditioning, the specimen being kept in the test atmosphere until the test is carried out. Time interval between conditioning and testing 7 Sampling and specimens 7.1 Specimen The specimen has a square sh
21、ape. The dimension of the sides shall be (100 I 11 mm. Other dimensions of the specimen may be used, subject to agreement between the purchaser and supplier, but shall have a surface area of 100 cm* with a tolerance of & 2 %. 7.2 Number and distribution of specimens At least three specimens shall be
22、 used. These shall be evenly distributed and cut from the sample diagonally across the width or length, as shown in figures 1 and 2 for woven fabrics and in figure 3 for unidirectional sheet or tape. -1 _-_ CEN ENiw2329 93 W 3404589 0042612 763 m Page 5 EN 2329:1993 8 Procedure Cut the specimens fro
23、m a representative sample of the material under test, using the appropriate template. Weigh each specimen with its separating film(s) to the nearest mg (m1). Remove the separating film(s) and weigh this to the nearest mg (mt). 9 Calculation and expression of results The mass per unit area metre for
24、each specimen is calculated from the formula : m = (m1 - m2) X 100 where : m : the mass per unit area, in g/m*, ml mi : the mass of the separating filmts), in g. : the mass of the specimen plus separating film(s). in g, Calculate the arithmetic mean of the values obtained for m, to the nearest g/m2.
25、 10 Test report The test report shall include the following information 10.1 number 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 Reference to the type of preimpregnate, with complete description, including prepreg batch Reference to this standard Description of the sampling method Number of specimens use
26、d, if different from this standard Dimensions of specimens, if different from this standard Atmosphere used for conditioning and testing and actual time used for conditioning Individual values. Arithmetic mean value of the mass per unit area Observations on any circumstances liable to have influence
27、d the results Page 6 EN 2329:1993 3 50 )-c Dimensions in milimetres 3 so icL CEN EN*Z329 93 3404589 0042bl13 bTT i t I Weitvorn I Width L m Figure 1 - Example of positioning of specimens on woven textae ass fibre fabric uirripleacross the width oimensiw in millime tres I I Figure 2 - Example of positioning of specimens on woven textite ass fibie fabric sowe an axis inclined at an angte a as close OS possible to the weft direction CEN EN*2329 93 3404589 0042614 536 Page 7 EN 2329:1993 Figure 3 - Exame of positionng of specfhens on textile Hass fibre unidimtional sheet or tape same
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