Item
|
type
|
||||||
type I
|
type II
|
type III
|
|||||
variable range
|
|||||||
Hardness
|
Difference before and after ageing (IRHD)
|
|
±20
|
||||
Max. Value after ageing (IRHD)
|
85
|
||||||
Tensile strength
|
variable rate in performance ≤
|
25
|
30
|
40
|
|||
Min. value after ageing Mpa
|
12
|
10
|
5
|
||||
Rate of elongation at break
|
variable rate in performance% ≤
|
50
|
55
|
||||
Min. value after ageing
|
200
|
180
|
Type
Item
level
|
Abrasive wear
|
||
type I
|
type II
|
type III
|
|
First quality
|
0.8
|
1.0
|
1.0
|
accepts
|
1.0
|
1.2
|
1.2
|
Item
|
interlayer of cloth
|
cover layer and cloth interlayer
|
|
Thickness of the cover layer≤1.5mm
|
Thickness of the cover layer>1.5mm
|
||
The average value of the longitudinal specimen shall be no less than
|
3.0
|
2.2
|
2.6
|
The peak value of the longitudinal specimen
|
2.0
|
1.6
|
2.0
|