Item

Class

T1

T2

T3

T4

Test temperature

≤100°C

≤125°C

≤150°C

≤175°C

Change range allowed

Hardness

Difference before and after aging(IRHD)

+20

+20

±20

±20

Maximum value after aging(IRHD)

85

85

85

85

Tensile Strength

Change rate after aging/%

-25

-30

-40

-40

Minimum value after aging/MPa

12

10

5

5

Breaking Elongation

Change rate after aging/%

-50

-50

-55

-55

Minimum value after aging/%

200

200

180

180

Interlaminar bond strength