Barrier Properties

Barrier Properties of Various Flexible Substrates

Clear Metalized PET Metalized BOPP Metalized Nylon PE Silicon Oxide Coated PET Alumium Oxide Coated PET
WVTR
(38℃ and 90% RH) (g/100in2 24 hour)
1-2 0.01-0.04 0.01-0.03 0.1-0.15 0.07 0.10 0.07-0.1
OTR
(23℃ and 0% RH) (cc/100in2 24 hour)
6-7 0.015-0.07 1-3 0.1-0.15 0.05 0.15 0.1-0.19

OTR Properties of Various Film Types

The following OTRs are bulk material properties diaplayed at 1mil. You may divide by the guage (in mil) in order to approximate OTR at a different thickness.

FILM TYPE OTR @ 73℉ (23℃), 0%RH
(cc/100 in2/24 hour) (cc/m2/24 hour)
EVOH (Ethylene Vinyl Alcohol) 0.005-0.12 0.08-00.19
Biax Nylon-6 1.2-2.5 18.6-39
OPET (Oriented Polyster) 2-6 31-93
OPP 100-160 1550-2500
HDPE (High Density Polyethylene) 150-200 2300-3100
OPS (Oriented Polystyrene) 280-400 4350-6200
LDPE(Low Density Polyethylene) 450-500 7000-8500

The following OTRs are enhanced by coating or metalizing. Therefore they are not bulk film properties ad total film thickness has little impact on the OTR value.

FILM TYPE OTR @ 73℉ (23℃), 0%RH
(cc/100 in2/24 hour) (cc/m2/24 hour)
Metalized OPET 0.01-0.11 0.16-1.7
PVOH – Coated OPP (AOH) 0.02 0.31
Metalized Biax Nylon-6 0.05 0.78
PVDC Coated OPET 0.30-0.50 4.7-7.8
High Barrier PVDC Coated OPP 0.30-0.60 4.7-9.3
PVDC Coated Biax Nylon-6 0.35-0.50 4.7-7.8
Metalized OPP 1.2-10 19-160
Sealable PVDC Coated OPP 1.5-3.5 23-54

Barrier Properties of Plastic Raw Material

Material Characteristics O.D. µm O2TR
cc/m2/24hr
WVTR
g/m2/24hr
PET Standard PET / 12 110
(23℃, 0% RH)
50
(38℃, 90% RH)
PET PVDC Coated / 12 8
(23℃, 85% RH)
8
(38℃, 90% RH)
PET SiOx / 12 3.5
(23℃, 85% RH)
39
(38℃, 90% RH)
PET Al2O3 / 12 2
(23℃, 0% RH)
2
(38℃, 90% RH)
PET Metalized 2.0 12 1.5
(23℃, 75% RH)
1.5
(38℃, 90% RH)
PET White and Metalized 2.2 12 1.5
(23℃, 75% RH)
1.5
(38℃, 90% RH)
PET With Inorganic Coating / 12 1
(23℃, 60% RH)
2.5
(38℃, 90% RH)
PET Metalized with High Barrier 2.6 12 0.08
(25℃, 85% RH)
0.04
(38℃, 90% RH)
PET Polyethylene Napthalate / 19 <1 3.8
(38℃, 90% RH)
PET Polycrylonitrile / 0.8
(23℃, 75% RH)
5
(38℃, 90% RH)