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Waterproofing Geomembrane

Vynon EF sheet

Vynon EF sheet Vynon EF sheet is a Tunnel waterproofing geomembrane especially developed for NATM tunnel application.
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Characteristics

-Excellent water sealing effect
-Supplied with un-woven cloth
-Excellent prevention effect of concrete cracking

Physical properties

■EVA geomembrane (main body)

Test item Unit Standard Test method
Specific gravity － 0.95±0.05 JIS K 6773
Hardness － Max. 98 JIS K 6773
Thickness mm Min. 0.8 ref. JIS A 6008*
Tensile strength +20C N/mm² Min. 16 JIS K 6773
-10C Min. 30 JIS K 6773
Elongation +20C % Min. 600 JIS K 6773
-10C Min. 500 JIS K 6773
Tear strength N/cm Min. 500 JIS K 6252
Softening Point C Max. -30 JIS K 6773
Weight change rate in alkali % ±1 JIS K 6773
Adhesion strength at welded point % Min. 20 JHS 706

*: Average of 5 points should be Min. 0.8mm and minimum thickness should not be less than -5% of the standard.

■Un-woven cloth (back up material)

Test item Unit Standard Test method
Thickness mm Min. 3.0 JIS L 1096
Weight per unit area g/m² Min. 300 JIS L 1096
Tensile strength Longitudinal N/5cm Min. 200 JIS L 1096
Landscape Min. 5.0
Elongation Longitudinal ％ Min. 20 JIS L 1096
Landscape Min. 50
Tear strength Longitudinal N Min. 50 JIS L 1096
Landscape Min. 50

*: Measuring load 20g/cm2

Specifications

Item code Back up material Thickness
 (mm)		 Sheet
(mm)		 Nominal Width
(mm)
EF-F8 un-woven cloth 0.8 2200 2000
EF-F10 un-woven cloth 1.0 2200 2000
EF-F20 un-woven cloth 2.0 2200 2000

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