Table 8.5
Typical properties of some commercial microporous membranes
Property
Company
Thickness
(average)
Basis weight
(g/m
2
)
Porosity
Air
permeability
Tensile
strength
Tensile elongation
at break
Puncture
resistance
Thermal shrinkage at
120
C, 1 h
ENTEK
20
μm
10.5
43%
300 s
MD > 1000 kg/
cm
2
MD
– 90%
550 g
MD
– <10%
TD
– 750 kg/
cm
2
TD
– 300%
TD
– <3%
ENTEK
EPX
12
μm
5.5
54%
65 s
MD > 1000 kg/
cm
2
MD
– 90%
300 g
MD
– <12%
TD
– 800 kg/
cm
2
TD
– 230%
TD
– <7%
EPENTEK
EPH
16
μm
8.4
47%
150 s
MD > 1000 kg/
cm
2
MD
– 80%
430 g
MD
– <10%
TD
– 700 kg/
cm
2
TD
– 250%
TD
– <4%
310
A. Arya and A. L. Sharma