*Permeability of Water Vapour through Polymer Film at 25oC

( cc at STP)(mm X 108) / (cm2 s)(cm Hg)


PVDC ( SARAN )
0.3 – 1
PTFE (TEFLON)
0.3
Butyl Rubber
1.3
Poyethylene ( r = 0.960)
1.2
Poyethylene ( r = 0.938)
2.5
Poyethylene ( r = 0.922)
9.0
Poyethylene ( r = 0.907)
5.1
PVC
6.1
Poly( Vinyl Chloride-Vinyl Acetate)
7.0
PET ( Mylar)
13
Polystyrene
12
Polyacrylonitrile
13
Polybutadiene
47
Poly(styrene- butadiene)
9
Poly(acrylonitrile-butadiene (62%) )
15
Polyisoprene ( Natural Rubber )
30
Nylon 66 ( 95% rh)
68
Cellulose Acetate
550
Cellulose Acetate ( 15% dibutyl phthalate )
740
Ethyl Cellulose ( plasticized )
1300
Poly vinyl alcohol, p= 2.3 cn Hg
4200

* These values are presented here for references only. The author of this web page does not take any resopnsibility regarding the accuracy of these values.
 

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For more information please call

Subir K. Dey

subirdey@yahoo.com

Tel. # (973) 642 4996

Polymer Processing Institute

at

New Jersey Institute of Technology

Dept. PEC/CMS

218 Central Avenue

Newark, NJ 07102