40g Greaseproof Paper 9 High Oil Resistance for Baking and Butter Packaging
This 40 g/m² greaseproof paper achieves Kit 9 oil resistance, suitable for high‑fat foods like butter, margarine, and oil‑rich pastries. The advanced fluorine‑free bio‑coating (nanocellulose reinforced) withstands temperatures up to 180°C, making it ideal for baking tray liners and confectionery packaging. Excellent water vapor barrier (WVTR ≤15 g/m²·24h) keeps baked goods crisp.
Technical Specifications (QB/T 1014‑2010 & GB 4806.8‑2022)
| Parameter | Unit | Value |
|---|---|---|
| Basis Weight | g/m² | 40 ±3.5 |
| Thickness | mm | 0.06‑0.08 |
| Grease Resistance (Kit) | grade | Kit 9 |
| Whiteness | % | ≥75 |
| Tensile Strength MD | kN/m | ≥3.2 |
| Tensile Strength CD | kN/m | ≥2.0 |
| Burst Strength | kPa | ≥260 |
| Water Vapor Transmission Rate | g/(m²·24h) | ≤15 |
| Coating Weight (double side) | g/m² | 2.0‑3.0 |
| Temperature Resistance | ℃ | Up to 180 |
Process Introduction
High‑density base paper (beating degree 80‑82°SR) with 75% softwood pulp. Formed on a fourdrinier machine, pressed, and pre‑dried. Dual‑side curtain coating with nanocellulose‑reinforced modified starch (solid content 15‑18%). Coating weight 2.0‑3.0 g/m² total. Post‑drying at 120‑140°C for full crosslinking. Hard calendering yields smoothness ≥400s. Finished paper is pinhole‑free and heat‑stable.
Applications & Advantages by Category
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Butter Wrappers – Prevents oil migration; maintains shape at room temperature.
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Baking Tray Liners – Non‑stick, greaseproof, withstands 180°C oven heat.
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Pastry Boxes – Lining for croissants, danishes, and puff pastries.
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Cheese Packaging – Wraps oily cheeses like cheddar and gouda.
Why Choose This Paper – 40g Kit 9 delivers superior barrier for high‑fat products, combining baking heat resistance with fluorine‑free safety.
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