1、II I AECMA PREN2106 78 1012311 0007706 9 mi Approved by COMITE DE NORMALISATION Of A. E.C.M.A. 1977-06-24 A.E.C.M.A. STANDARD NORM E A.E .C.M .A. A.E.C.M.A. NORM _7- The equivalent versions in French and German languages can be supplied by B.N.A.E., 8, rue Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT
2、- FRANCE. DRAFT prEN2 106 Edition 1 January 1978 ENGLISH .VERSION ACRYLONITRILE-BUTADIENE RUBBER (NBR) HARDNESS 60 e CHARACTER ISTICS AEROSPACE SERIES ELASTOMERE ACRYLNITRIL-BUTADIEN ELASTOMERE (NBR) NITRILE ACRYLIQUE-BUTADINE (NBR) HRTE 60 DURETE 60 EIGENSCHAFTEN CAR ACTER ISTI QU ES LU FT-UND RAUM
3、FAH RT-REIH E SERIE AEROSPATIALE The text of this standard, which exists in three equivalent versions (English, French, 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 rese
4、rvations expressed by Official Services and not resolved in this issue, have been incorporated in the history sheet which has accompanied this prEN to GEN. it is published on yellow paper as a draft European Standard intended to receive, under the same presentation and according to its own rules, th
5、e approval of CEN (European Committee for Standardization). , AECMA PREN2LOb 78 LOL23LL 0007707 O B prEN2106 page 2 I CO NT ENTS 1 2 REFERENCES 3 CONDITIONS OF USE 4 REQUIRED CHARACTERISTICS SCOPE AND FIELD OF APPLICATION AECMA PREN2106 78 prEN2 106 Page 10123LL 0007708 2 m i DRAFT EU ROPE AN ST ANI
6、) ARD AEROSPACE SERI ES prEN2 106 ACRYLONITRILE-BUTADIEm RUBBER (NBR) HARDNESS 60 CHARACTERISTICS 1 SCOPE AND FIELD OF APPLICATION This standard specifies the physical-chemical characteristics of acrylonitrile-butadiene rubbers (NBR), hardness 60, for use in aerospace construction. 2 REFERENCE EN200
7、6 - Rubber for aerospace use. Test methods, 3 CONDITIONS OF USE 3.1. Typical use. For use in general purpose application where resistance to petroleum based f luidsis required. Note : These materials have poor natural weathering and ozone resistance. 3.2. Operational temperatures, Continuous service
8、 : from - 40 to + 110C Intermittent service for certain applications ! from -55 to +14OoC NOTE - The 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 y.- 9 - Change i
9、n hardness -_ - Change in tensile strength maximum T prEN2106 Page 4 AECIA PREN2LOb 78 W L0123Ll 0007709 Y r 4 REQUIRED CHARACTERISTICS The physical-chemical characteristics are defined in table 1. TABLE 1 - Test procedure, property units , requirements 9 rest. Properties Requiremena I values 1 - 2
10、i-5 6o -4 In terna tional hardness Density, tolerance on type approval value f 0,02 10,o 300 3 Tensile stength minimum 4 _II 5 6 - - Elongation at break minimum 5 I % I Compression set maximum : 72 hours at 100C (E- Low temperature brittle point maximum -35 o to +20 -20 11 - 50 - Change in elonsatio
11、n at break maximum I I - Change in weight maximum Resistance to liquids - 10 Distilled water : 70 hours at 100C - Change in hardness -10 to +lo - 12 o to +ir, - Change in volume Oil No, 1 : 70 hours at 100C - Change in international hardness 12 I IRHD O to i-25 -25 to +10 - Change in volume Liquid B : 7 days at 23C - Change in volume Liquid A : 7 days at 23C - Change in volume Test 11 + Drying : 22 hours at 100C - Change in volume maximuni . O to +30 -y 12 -1 to +LO - 12 Note : Test to be performed by supplier : - Type approval, tesCs 1 12 - Batch approval tests 1 5 and 10.
