JT/T4-2004 | BS5400 Section 9.2 | ||
Natural Rubber | Neoprene CR | Natural Rubber | Neoprene CR |
60±5 | 60±5 | 50±5/60±5/70±5 | |
18 | 17 | 17 | 15.5 |
450 | 400 | 450/400/350 | 400/350/300 |
70 o C×22h | 70 o C×22h | 100 o C×22h | |
<30 | <15 | <30 | <35 |
70 o C×168h | 100 o C×70h | 70 o C×168h | 100 o C×48h |
-5,+10 | 0,+10 | <10 | <15 |
<15 | <15 | ||
<20 | <40 | <20 | <40 |
25~50pphm,20% strain | 25~50pphm,20% strain | ||
40 o C×96h | 30 o C×96h | ||
No Cracks | No Cracks |