The liners are made of closed-cell polyethylene foam coated with a barrier film on both sides.
EPE foam is produced through the extrusion process.
EPE/EVOH foam liners have better barrier properties than standard ones.
EVOH is a copolymer of ethylene and vinyl alcohol, free from PVDC.
Application:
For sealing closures used when capping bottles or jars with carbonated and non-carbonated beverages, non-alcoholic drinks (including mineral waters and juices), oils, facial creams, as well as alcoholic beverages with an alcohol content of up to 95%, including wine.
Available diameters:
From 14,55 mm up to 40,60 mm with tolerance ± 0,15 mm
From 42,00 mm up to 57,37 mm with tolerance ± 0,25 mm
Another diameters available on request.
Technical parameters:
- Density 250-500 kg/m³
- Thickness: 1,5 – 3,0 mm
- Flatness: max 10%
- EVOH film thickness: 50 μm
- The thickness of the EPE core depends on the customer’s needs
- Density and thickness with a tolerance of ±10%
- Hardness for a density of 300 kg/m³ – 77° Sh with a tolerance of ±5%.
- Maximum pressure for EVOH liners:
Density 300 kg/m³ – 4 bar
Density 350 kg/m³ – 5 bar
Density 400 kg/m³ – 6 bar
(tests were made on the Secure Sea Tester device, model SST)
Permeability of EVOH/EPE/EVOH layer:
- Oxygen permeability: < 1 [cm³/m²·24h] (values 4.7*10⁻⁴ – 5.8*10⁻⁴)
- Water vapor permeability: 0.32 ± 0.050 [g/m²·24h·0.1MPa]
The EVOH layer acts as a barrier against gases (oxygen, carbon dioxide), flavors, odors, fuel vapors, chemical products, MOSH/MOAH, and organic solvents.