OPS vs. PET
Weight Foil thickness µ J0375
J0375PE
Foil thickness
Medium weight 10 containers
330
11,40
330 µ
11,40
15,21
Saving 380 gr/1000pcs
330
Medium weight 10 containers 375cc
15,21
Source: tests conducted by R&D internal laboratory of ACE packaging.
Density (g cm-3) 1,05 - 1,02
1,34 - 1,39 Source: “Food packaging” materiali, tecnologie e qualità degli alimenti Luciano Piergiovanni and Sara Limbo pag. 216
The OPS weighs 30% less, at the same thickness, compared to PET. Choosing the OPS allows a saving in terms of raw materials, taxation and transport.
Permeability O2 Permeability
Water vapour permeability WVTR
3.800
100-155
45
15-20
Conditions: O2 permeability: PO2 for 25µm (cm3 24h-1 m-2 bar-1) - WVTR: for 25µm, (g m-2 24h-1) 38°C, 90% ΔUR Sources: “Food packaging” materiali, tecnologie e qualità degli alimenti - Luciano Piergiovanni and Sara Limbo pag. 216
The OPS is from 5 to 10 times more permeable to water vapor compared to PET, this allows reducing to a minimum the condensation, mainly responsible for the loss of fragrance in products like sandwiches and ready meals.
The OPS has also a gas permeability (such as O2 and CO2) 100 times higher than the PET, this means that allows the breathing in the ready vegetables without going asphyxia, keeping them fresh for longer.
Optical properties
Haze (%)
Clarity (%)
0,9
99,6
2,4
99,6
J0375
J0375PE
Source: tests conducted by R&D internal laboratory of ACE packaging.
The PET has an haze more than twice compared to the OPS, it means that the PET in more opaque.
Resistance to temperature
Temperature range for food use
-30
+70
-40
+60
Source: “Food packaging” materiali, tecnologie e qualità degli alimenti Luciano Piergiovanni and Sara Limbo pag. 216
Source: tests conducted by R&D internal laboratory of ACE packaging.
Carrying the OPS and the PET at a temperature of 70°C for one hour, the OPS maintains its structure, instead the PET begins to melt.