1、CEN ENu2332 93 = 3404589 0042639 906 W EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2332: 1993 March 1993 UDC 677.521.074.077.62: 620.1 : 543.7: 629.7 Descriptors: Aircraft industry, glass-cloth, pisstics, preimpregnated products, tests, determination, resins. flows English version Aerospace
2、 series - Textile glass fibre preimpregnates - Test method for the determination of the resin flow Srie arospatale - Primprgns de verre textile - Mthode dessai pour la dtennination de lcoulement de rsine Luft- und Raumfahrt - Glasfilament- Prepreg - PNmethcde zur estimning des Harzflusses This Europ
3、ean 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 natlonal standard without any alteration. Up-to-date lists and bibliographical references concern
4、ing such national standards may be obtained on application to the Central Secretariat or to any CEN member. 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 member into its own lan
5、guage 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, Frame. Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands. Norway, Portugal, Spain. Sweden. Switzerland and
6、United Kingdan. European Cannittee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: me de Stassart.36 81050 Brussels o 1993 Copyright resewed to CEN members Ref. No. EN 2332: 1993 E CEN ENm2332 93 W 3404589 O042640 628 Page 2 EN 2332:1993 Content
7、s list 1 2 3 4 5 6 7 8 9 10 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 Association of Aerospace
8、 Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has sruccessively received the approval of the National Associations and the Official Services of the m-etmber countries of AECMA, prior to its presentation to CEN. This Euro
9、pean 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. .I According to the CENKENELEC Internai Regulations, t
10、he 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 EN82332 93 W 3404589 0042b4l 564 Page 3 EN 2332:1
11、993 1 Scope 1.1 preimpregnate, for aerospace use. This standard specifies a method for determining the resin flow of a textile glass fibre fabric 1.2 is the responsibility of the user of this standard to adopt appropriate health and safety precautions. This standard does not give any directives nece
12、ssary to meet the health and safety requirements. It 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 hereafter. For
13、 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 2330 Aerospace series - Textile glass fi
14、bre 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) 3 Definitions A textile glass fibre preimpregnate with a thermosetting or thermoplastic resin is a material
15、 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 specimen under agreed.conditions of temperature and pressure. 5 Apparatus 5.1 Balance wit
16、h an accuracy of 0.1 mg 5.2 Template of standard specimen 5.3 5.4 and the agreed pressure with an accuracy off 5 % 5.5 5.6 Laboratory timer Ancillary items such as sharp cutting knife and tweezers Any mechanical device capable of maintaining the agreed temperature with an accuracy off 5 OC Metal pla
17、tes not less than 200 mm X 200 mm and approximately 1 , mm thick 5.7 Auxiliary materiais - glass fabric, ca. six plies, 200 mm X 200 mm. style 181 or similar, - perforated polyvinyl fluoride (PVF) film, 0.1 mm thickness, 200 mm X 200 mm, - glass fabric coated with polytetrafluoroethylene (PTFE), Ca.
18、 three plies, 200 mm X 200 mm. 5.8 Template or punch for cutting cured specimen - 1 1 Published as AECMA pre-standard at the date of publication of this standard CEN EN+2332 73 3404587 0042b42 4T0 = Page 4 EN 2332:1993 6 Atmosphere for conditioning and testing 6.1 Conditioning 6.1.1 For material sto
19、red 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. Conditioning of material stored at ambient temperature 6.1.2 For material stored at temperatures lower than th
20、e ambient temperature, the material, 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 than 8 h and the actual time shall be recor
21、ded in the report. When the material has reached the ambient temperature, the amount 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. Conditioning of material stored below ambient temperature 6.2 Testing 6.2.1
22、Atmosphere for testing The tests shall be carried out at temperature and relative humidity conditions in accordance with EN27436. 6.2.2 After conditioning, the test shall be carried out within 6 h, unless otherwise specified, the specimen being kept in the test atmosphere until the test is carried o
23、ut. Time interval between conditioning and testing 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 least 12 g. The dimension of the sides shall be (lo0 i 1) mm. The plies shall be assembl
24、ed 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 purchase
25、r and the supplier, but having a surface area of 100 cmz with a tolerance of I 2 %. 7.2 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 in figures 1 and 2 for woven fabrics a
26、nd in figure 3 for unidirectional sheet or tape. Number and distribution of specimens CEN ENr2332 93 W 3404589 O042643 337 Page 5 EN 2332:1993 8 Procedure Cut the necessary number of plies from the preimpregnate under test, using the appropriate template. Remove the separating film(s) and carefully
27、superimpose the preimpregnate plies, oriented alternately at 8/98. to form a uniform pack and give a specimen of total mass within the range specified in 7.1. Weigh the specimen to the nearest mg (mo) and then assemble the pack in the mechanical device as follows, starting with the bottom layer : -
28、one layer PTFE coated glass fabric, - three layers glass bleeder fabric, - one layer perforated WF 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
29、the temperature (see note below) and apply pressure (see note below) within a maximum of 10 s, then maintain it for the specified period (see note below). NOTE :Temperature of the platens, pressure applied to the assembly and period of application are those as specified in the relevant material data
30、 sheet. Remove the laminate from the mechanical device. Remove the release film and bleeder fabric material. Condition the specimens in the test atmosphere (see 6.2.1 ) to constant mass. Cut out a square of length (70f 0.7) mm and width of (70I 0,7) mm from the centre of the cured laminate and weigh
31、 this to the nearest mg (mp). Subject to agreement between the purchaser and the supplier, the option of a circle with a diameter of (50 I 1 ) mm may be substituted for the square. 9 Calculation and expression of results 9.1 The uncorrected resin flow of the specimen. expressed as a percentage of th
32、e original mass. is calculated from the formula : Uncorrected resin flow (not corrected for volatiles) where : Fi : the resin flow expressed as a percentage of the original mass, mo : the original mass of the specimen, in g. m2 : the mass of the cut out cured square or circle, in g, s1 : the area of
33、 the original specimen, in mm2, s2 : the area of the cut out cured or circle, in mm2. Calculate lhe arithmetic mean of the values obtained for FI, CEN EN*2332 93 3404589 0042b44 273 = Page 6 EN 23321993 9.2 Corrected resin flow for volatiles The corrected resin flow of the specimen, expressed as a p
34、ercentage of the original mass, is calculated from the formula : where : F2 : the resin flow expressed as a percentage of the original mass. L mo : the original mass of the specimen. in g, V : the volatile content, determined by the method given in EN 2330, in %, m2 : the mass of the cut out cured s
35、quare or circle, in g, s1 : the area of the original specimen, in mm2, sq : the area of the cut out cured square or circle, in mm2. Calculate the arithmetic mean of the values obtained for F2. 10 Test report The test report shall include the following information : 10.1 number 10.2 10.3 10.4 10.5 10
36、.6 10.7 10.8 10.9 10.1 o Reference to the type of preimpregnate, with complete description, including prepreg batch Reference to this standard Description of the sampling method Number of specimens used, if different from this standard Dimensions of the specimens, number of plies used and original m
37、ass Atmosphere used for conditioning and testing and actual time used for conditioning. Curing temperature, pressure and time Individual values Arithmetic mean value of the resin flow, expressed as a percentage of the original mass Observations on any circumstances liable to have influenced the resu
38、lts CEN ENx2332 93 3404589 0042b45 LOT M I I I I Wcttprn l 0 I A ao! ls I -i) f e W l I I I I gg I 3 I t I I i 2 so 12 so - Width t- - Page 7 EN 2332:1993 Dimensions in millimetres Figue 1 - Example of positiing of pties tor a specimen on woven textle Hass fbre fabric same across the width I I I I l
39、 Wett yam I trection I - I I I I I I I l Width L Figure 2 - Example of positioning of Nies for a specimen on woven textile glass fibre fabric sampte oiong an oxis inclined at an angle a as close os possible to the wef t direction. Page 8 EN 2332:1993 CEN EN*Z332 93 w 3404589 0042646 04b Figwe 3 - Exarrple of positiOnng of pii= for o specimen on textile goss fibreuudirectional sheet or tape sowe
