P

PY

Ⅰ

Ⅱ

Ⅰ

Ⅱ

1

 Tensile properties

Pull strength /（N/50mm）≥

150

200

400

600

Tensile elongation at maximum
pull strength/%≥

30

25

30

40

2

Tear strength ≥

12

25

180

300

3

 Heat resistance

70℃，2h No displacement, no flowing, no dripping

4

Low-temperature bending /℃ 

-20

-25

-20

-25

No crack

5

Watertightness 

0.4Mpa,120min Watertight 

6

 Joint watertightness

 0.4Mpa,120min Watertight

7

Peel strength between
membranes /(N/mm) ≥

Non-treatment 

1.0

Heat treatment 

1.0

8

Peel strength under water/(N/mm) ≥

1.0

9

Oil permeability/number of sheets
≤

2.0

10

Holding power /min
≥

15

11

Peel strength between cement
mortar and membrane
/(N/mm) ≥

Non treatment 

2.0

 Heat treatment

1.5

12

Peel strength between membrane and cement mortar after being
immersed in water /(N/mm) ≥

1.5

13

Thermal aging（80℃，
168h）

Retention rate of tensile
strength≥

90

Elongation retention％≥ 

80

Low temperature bending /℃ 

-18

-25

-18

-23

No crack

14

 Thermal stability 

 Appearance

No drum, no sliding, no dripping

  Dimensional change /％≤

2.0

15

Peel strength to chemical
corrosion of   lapped
membranes /(N/mm)

Acid treatment≥ 

1.0

Alkali  treatment≥

1.0

 Salt treatment≥

1.0