70gsm Single Side Glossy White Kraft Paper for Aluminum Foil Lamination
This 70 g/㎡ single‑side glossy white kraft paper is a premium base for aluminum foil lamination, metallization, and extrusion coating. The glossy surface (smoothness 117.5s) provides excellent anchorage for vacuum metallization. High tightness (0.85 g/cm³) prevents coating penetration.
| Parameter | Unit | Value |
|---|---|---|
| Basis Weight | g/m² | 70.3 |
| Thickness | µm | 82 |
| Tightness | g/cm³ | 0.85 |
| Gloss | % | 14.6 |
| Smoothness Front | s | 117.5 |
| Smoothness Back | s | 9.5 |
| Tensile Strength MD | N | 56.68 |
| Tensile Strength CD | N | 34.74 |
| Whiteness | % | 83.15 |
| Air Permeability | µm/Pa·s | 5.78 |
| Water Absorption | g/m² | 26.9 |
| Moisture | % | 5.5 |
Very high basis weight requires multiple press sections. Single‑side calendering with polished steel roll at 200‑250 kN/m linear pressure. Back side remains rough for adhesive bonding. Dried to exactly 5.5% moisture to avoid curl after lamination.
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Aluminum Foil Lamination – Glossy side bonds to foil for flexible pouches.
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