Classification
|
Soak liquid
|
Density
|
Soaking condition
oC x h
|
Change rate before and after soak
|
|
Swelling rate
|
Change rate of strength
|
||||
A1
|
HCL
|
18%
|
50℃×96h
|
+10% Following
|
-10% within
|
A2
|
H2SO4
|
50%
|
50℃×96h
|
+10% Following
|
-10% within
|
A3
|
NaOH
|
48%
|
50℃×96h
|
+10% Following
|
-10% within
|
Type
|
Tensile Strength /Mpa ≥
|
Elongation at break /%≥
|
Abrasion/mm³≤
|
Hardness
+10 -5
|
Before aging
|
14.0
|
400
|
250
|
60
|
After aging
|
12.0
|
340
|
--
|
65
|
Note:When the thickness of the cover layer is 0.8-1.6mm, the thickness of the sample can be cut out of the maximum thickness, at this time, tensile strength and elongation at break allow less than 15% to this table。
|