Item 

Value

Type

WFDB-13

WFDB-16

WFDB-18

WFDB-20

WFDB-25

Nominal thickness mm

0.13±0.03

0.16±0.03

0.18±0.04

0.20±0.04

0.25±0.04

Longitudinal tensile strength N/50mm

≥150

≥160

≥180

≥200

≥250

Longitudinal Breakdown
Elongation 

≤15

≤15

≤20

≤20

≤20

Water absorption
speed mm/min

≤0.1

≤0.1

≤0.1

≤0.1

≤0.1

Unit Weightg/

70±5

80±5

85±5

90±5

105±5