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China
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Hengshui, Hebei
| Testing Item | Index | Test Method | |||
| Superior Grade | First Grade | Qualified | |||
| Volatile matter(%)? | 0.*0 | 0.*5 | 0.*0 | GB/T***7 | |
| Ash content | ?0.*0 | GB/T***8A | |||
| Organic acid(%) | 4.*0~6.*5 | GB/T***7A | |||
| Soap content(%) | ?0.5 | ||||
| Combinated Styrene content(%) | *2.5~*4.5 | GB/T***8 | |||
| Raw rubber
mooney viscosity ML(1*4)**0?C |
*5~*5 | *4~*6 | GB/T***2.1 | ||
| Compounded
rubber mooney viscosity ML(1*4)**0?C? |
*3 | ||||
| **0%
Stretching Stress (**5?C)/MPa |
*5min | *5.2~*9.1 | *4.7~*9.6 | GB/T***6A | |
| *5min | *0.6?2.0 | *0.6?2.5 | |||
| *0min | *1.5?2.0 | *1.5?2.5 | |||
| Tensile
strength (**5?C, *5min)/MPa |
?*5.5 | ?*5.5 | ?*4.5 | ||
| Elongationg at
break (**5?C, *5min)/% |
?**0 | ?**0 | |||
