1、AECMA PREN2109 78 W 103233L 0007738 5 m Il Approved by COMITE DE NORMALISATION of A.E.C.M.A. 1977-06-24 A:E .C.M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM The equivalent versions in French and German languages can be supplied by B.N.A.E., 8, rue Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT - FRAN
2、CE. k DRAFT prEN2109 Edition 1 January 1678 ENGLISH VERSION CHLOROPRENE RUBBER (CR) HARDNESS 40 CHAR ACT E R IST I CS AEROSPACE SERIES ELASTOMAE CHLOROPRNE (CR) DURETE 40 CAR ACTER IST IQU ES SERI E AEROSPATIALE CHLOROPREN ELASTOMERE (CR) EIGENSCHAFTEN HRTE 40 LUFT-UND RAUMFAHRT-REIH E The text of t
3、his standard, which exists in three equivalent versions (English, Franch, German) has been drawn up under the responsability of A ECMA (Association Europenne des Constructeurs de Matriel Arospatial) and has been circulated to Official Services. Any reservations expressed by Official Services and not
4、 resolved in this issue, have been incorporated in the history sheet which has accompanied this prEN to CEN. It is published on yellow paper as a draft European Standard intended to receive, under the same presentation and according to its own rules, the approval of CEN (European Committee for Stand
5、ardization). AECMA prEN2109 page 2 PRENZLOS 78 W LOL23LL 0007739 7 E , I CONTENTS 1 2 REFERENCES 3 CONDITIONS OF USE 4 REQUIRED CHARACTERISTICS SCOPE AND FIELD OF APPLICATION I AECMA PREN2109 78 10L23LL 0007720 3 m! prEN2 109 Paga 4 DRAFT EUROPEAN STANDARD AEROSPACE SERIES prEN:2 109 CHLOROPRENE RUB
6、BB (CR) HARDNESS 40 CHARACTERISTICS 1 SCOPE AND FIELD OF APPLICATION This standard specifies the physical-chemical characteristics of chloroprene rubbers- (CR), hardness, 40, for use in aerospace construction. 2 REFERENCE EN2006 - Rubber for aerospace use, Test methods, _- - - - . - 3 CONDITIONS OF
7、USE 3.1. Typical use. For use in general purpose application where resistance to petroleum based fluids, ozone and natural weathering is. required. . 3.2, Operational temperatures, Continuous service : - from -40 to +llO“C Intermittent service for certain applications : from -55 to +14OoC NOTE - The
8、 above temperatures are given as guides in the selection of materials, For specific applications, the limiting performance tempe- ratures will require to be determined by testing, I AECMA PREN2107 78 W 10323LL 0007723 5 li 5- prN2i09 .Page 4 + - 4 REQUIRED CHARACTERISTICS The physical-chemical chara
9、cteristics are defined in table 1. TABLE 1 - Test procedure, property units, requirements r Method Unipi Requirement according I. and: i values to 2006 symbol Properties International hardness 2 Density, tolerance on type approval value 3 Tensile strength minimum 8 $0 5 Mi?a 5 % 450 4 Elongation at
10、break minimum 5 Compression set maximum : 72 hours at 100C 7 % 50 6 - 7 Low temperature brittle point maximum Ozone resistance Ozone concentration : 50 pphm temperature : 30C ; duration : 168 hours extension : 20%. 9. OC -40 13 No cracking permittec -I- -. -5 to +15 I Resistance to heat ageing - Air
11、 : 72 hours at 100C - Change in international hardness 11 IRHD o, 11 -20 - Change in tensile strength maximum 11 -40 - Change in elongation at break maximum % 11 -10 - Change in weight maximum lstance to liquids Distilled water : 70 hours at 100C 12 -15 to +15 - Change in international hardness IRHD
12、 o to +30 - Change in volume Oil No, 1 : 70 hours at 100C 12 -10 to +10 - Change in international hardness IRHD % % % 12 -35 -30 - Change in tensile strength maximum 12 - Change in elongation at break maximum - Change in volume 12 -10 to +JO : Test-to be-performed by supplier : - Type approval, tests 1 ta 10: - Batch approval tests 1 to5 and 10. N.ote
