Order

　Main Physics Mechanical Property Target of Flap

Common

Excellent

1

　Tensile Strength

≥8MPa

≥15MPa

2

　Elongation at  A Given stress

≥420％

≥420％

3

　Tension Set

≤28％

≤28％

4

　Shore A Hardness Degrees

60±3

60±3

5

　Tensile Strength Degrees Ageing

≥7.0 MPa

≥10MPa

6

　Tension Set Ageing

≥350%

≥350%