Physical properties of the resistance to the tropical covering
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Projects
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Type
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T1
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T2
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T3
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T4
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Allowable variation range
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Hardness
|
Difference between after aging and before aging(IRHD)
|
+20
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+20
|
±20
|
±20
|
Maximum value after aging(IRHD)
|
85
|
85
|
85
|
85
|
|
Tensile strength
|
Rate of performance change/%
|
-25
|
-30
|
-40
|
-40
|
Minimum value after aging/Mpa
|
12
|
10
|
5
|
5
|
|
Elongation at break
|
Rate of change after aging/%
|
-50
|
-50
|
-55
|
-55
|
Minimum value after aging/%
|
200
|
200
|
180
|
180
|
|
Note: T1--the testing temperature<100°C
T2--the testing temperature<125°C
T3--the testing temperature<150°C
T4--the testing temperature<175°C
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