1、AECMA STANDARD prEN 4505 NORME AECMA Edition P 1 AECMA NORM November 2001 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: - - Nota - Extra copies can be supplied by B
2、.N.A.E. - Technopolis 54 - 199. me Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX I I Descriptors: I Mr Pays ENGLISH VERSION Aerospace series Textiles Test method Determination of dimensional stability Srie arospatiale Textiles Mthode dessai Dtermination de la stabilit Luft- und Raumfahrt T
3、extilien Prfverfahren Bestimmung der Manderung This “Aerospace Series“ Prestandard has been drawn up under the responsibility of A ECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It has b
4、een technically approved by the expeds of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed fo an extent that interchangeability is affected, physically or functionally, without re-identificafion of the stand
5、ard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard fo CEN (European Committee for Standardization) for formal vote. Edition approved for publication I Comments should be sent within six months after the date of oublication
6、to I 2001-11-30 AECM A-STAN Gulledelle 94 6-1200 BRUXELLES aecma 200 Page 2 prEN 4505: 2001 a Contents Page O 1 2 3 4 5 6 7 8 9 io 11 . . . Normative references . Health and safety . Apparatus Reagents . Preparation of specimens Procedure . Calculation and expression of results Test report 3 3 3 3 3
7、 3 3 4 4 4 4 4 . Page 3 prEN 4505: 2001 O Introduction This standard specifies the determination of dimensional stability of narrow fabrics. 1 Scope This standard specifies the procedure for the determination of dimensional stability of narrow fabrics. 2 Normative references This European Standard i
8、ncorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the next and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this
9、European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 139 0 Textiles - Standard atmospheres for conditioning and testing 3 Terms and definitions For the purposes of this standard, the following t
10、erms and definitions apply. 3.1 dimensional stability the ability of a fabric to retain its dimensions when immersed in boiling water 4 Health and safety This standard does not necessarily include all health and safety requirements associated with its use. Persons using this standard shall be famili
11、ar with normal IaboratoryAest house practices. It is the responsibility of the user to establish satisfactory health and safety practices and to ensure conformity with any European, National or local laws/regulations. 0 5 Principle The test consists in measuring the changes in length after immersion
12、 in boiling water. 6 Apparatus A sufficiently large dish to accommodate the specimen. A plate glass sheet large enough to cover the specimen. Page 4 prEN 4505: 2001 7 Reagents No requirements 8 Preparation of specimens Cut a specimen not less than 450 mm long from the test sample and make a mark app
13、roximately 50 mm from each end. 9 Procedure 9.1 measure the distance between the marks. With the specimen laid on a flat surface and covered with a sheet of plate glass, accurately 9.2 using small weights as necessary. Lay the specimen flat in boiling water and keep it approximately 25 mm below the
14、water surface 9.3 After 15 minutes in the boiling water remove the specimen. Allow to dry on a flat surface at room temperature and then condition it according to IS0 139 and maintain this atmosphere until the test has been carried out. 9.4 Repeat the measurement through the plate glass. NOTE The us
15、ual convention is to denote extension by a At sign and a shrinkage by a A- sign. 10 Calculation and expression of results 10.1 Calculation of dimensional stability The dimensional stability is calculated in accordance with the following equation: CI = - d-d2 XI00 d2 where CI = Percentage change in l
16、ength dl = Final length d2 = Original length 11 Test report The report shall include the following information: Reference to this European Standard, .e. EN 4505. Identification of sample tested (.e. lot number, batch number). Percentage dimensional change in length and/or width. State if dimension has decreased (shrinkage) by means of a minus sign (-) or increased (extension) by means of a plus sign (+). Details of any deviation from this test method.
