Liquid
Packaging
Boards
Liquid Packaging Boards is a multi-ply paperboard with high stiffness, strong wet sizing and a high barrier coating, e.g. plastic. Only virgin paper fibers are used. The barrier coating must hold the liquid and prevent migration of air and flavors through the paperboard.
The base or middle ply is normally made of pulp from bleached or unbleached chemical pulp, (waste paper from a paper machine). CTMP gives more bulk and stiffness.
The top ply (inside) is made of bleached chemical pulp. Liquid packaging board are used for two package types: brick and gable top cartons.
Typical
Applications
Packaging for beverages. The most common applications are milk and juice box packaging.
Liquid Packaging Boards
| Item | Unit | 150 | 195 | 205 | 215 | 285 | Standard |
|---|---|---|---|---|---|---|---|
| Grammage | g/m2 | 150±4% | 195±4% | 205±4% | 215±4% | 285±4% | GB/T 451.2-2002 |
| Thickness | µm | 180±4% | 265±4% | 265±4% | 265±4% | 400±4% | GB/T 451.3-2002 |
| Stiffness (Taber 15°) — MD≥ | mN·m | 4.1 | 5.0 | 5.0 | 5.1 | 14.5 | GB/T 22364-2008 |
| Stiffness (Taber 15°) — CD≥ | mN·m | 1.7 | 2.0 | 2.0 | 2.1 | 6.0 | GB/T 22364-2008 |
| Moisture | % | 7.0±1.5 | GB/T 462-2008 | ||||
| PPS Roughness (Top) | µm | ≤1.8 | GB/T 22363-2008 | ||||
| ISO Brightness (Top) | % | 80±1 | GB/T 7974-2002 | ||||
| Bonding Strength | J/m² | ≥150 | GB/T 26203-2010 | ||||
| Folding Endurance | time | ≥400 | GB/T 457-2008 | ||||
| Infiltration 1% Lactic acid | kg/m² | ≤0.8 | |||||
| Infiltration 35%H2O2 | kg/m² | ≤1.2 | |||||
| IGT Blister | m/s | ≥1.0 | |||||