Saniflex WR111 Moisture Barrier: Technical Water Vapor Protection for Food Packaging
The Saniflex WR111 Moisture Barrier is a high-performance functional coating printable via flexography, specifically designed to drastically reduce the Water Vapor Transmission Rate (WVTR) in paper and board packaging. This technical barrier limits moisture absorption into the substrate, preventing curling and warping, and ensuring the structural integrity of the packaging in humid environments or demanding cold chains. Formulated with strict Food Contact compliance, it is available in both water-based and UV-based technologies, adapting to machine speed requirements, contact type (direct or indirect), and the specific barrier demands of each converter.
Machine Operational Advantages
- Drastic WVTR Reduction: Significantly decreases water vapor permeability, helping to preserve critical food textures (such as crispness) and preventing the re-wetting of the packaged product.
- Superior Substrate Stability: Minimizes paper and board swelling and deformation, reducing the mottle effect and notably improving ink anchorage during the printing process.
- Excellent In-Line Processability: Printable at high speeds on flexographic units and coaters, offering full compatibility with downstream conversion processes such as die-cutting, creasing, folding, and heat-sealing or gluing.
- Food Contact Regulatory Compliance: Formulations developed under strict European regulatory frameworks, allowing safe certification for food contact according to the packaging design needs.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Formulation Technology | Water-based / UV-based (Upon request) |
| Application Method | In-line flexographic unit and coater |
| Recommended Substrates | Coated paper/board, recycled, kraft, and films (with corona treatment) |
| Barrier Properties | WVTR reduction measurable under the ASTM F1249 standard |
| Layer Integration | Compatible with sequences: Primer / Barrier / Ink / Topcoat |
| Food Compliance (EU) | Framework Reg. (EC) 1935/2004, Reg. (EC) 2023/2006, Reg. (EU) 10/2011 (plastics), and BfR criteria (paper/board) |
Logistics & Handling
- Packaging formats: Available in 25 kg pails and 1000 kg IBC containers for industrial logistical optimization.
- Storage conditions: Store indoors between 5 °C and 30 °C. Protect from frost, direct sunlight, and heat sources.
- Shelf life: 12 months from the date of manufacture when kept in its tightly closed original container.
- Safety and environment: The water-based version features low VOC emissions, supporting sustainability and mono-material designs. Always refer to the Material Safety Data Sheet (MSDS) for handling protocols and required PPE.