BTS-80 Heat-Sealable Varnish: High-Performance Secure Sealing for Plastic Packaging
The BTS-80 Heat-Sealable Varnish is an advanced, industrial-grade acrylic formulation specifically designed for flexographic applications requiring flawless heat-sealing properties. Engineered to adhere strongly to high-demand plastic substrates such as PVC, PET, and polystyrene (PS), this varnish ensures a secure, hermetic seal with zero risk of blocking during winding or stacking processes. Its exceptional mechanical and chemical resistance maintains the structural integrity of the packaging and the visual quality of the print. It is the ideal technical solution for food packaging, cold chain trays, ready meals, and industrial applications that demand strict regulatory compliance.
Operational Advantages on Press
- Reliable Heat-Seal Capacity: Delivers a highly secure, consistent, and predictable heat seal on PVC, PET, and PS structures, maximizing packaging line speeds.
- Non-Blocking Performance: Its specialized formulation prevents unwanted adhesion during intensive storage, stacking, and handling, drastically reducing waste.
- High Post-Seal Resistance: Offers excellent mechanical behavior against die-cutting, folding, and friction, guaranteeing packaging durability throughout the supply chain.
- Universal Flexographic Compatibility: Outstanding printability and runnability in flexo equipment, ensuring perfect anchorage over underlying inks as well as directly onto the plastic substrate.
- Certified Food Grade: Fully formulated to comply with stringent European regulatory frameworks for safe food contact materials.
Technical Specifications and Variants
| Property / Characteristic | Technical Specification |
|---|---|
| Chemical Nature | Acrylic Varnish |
| Printing Process | Flexography |
| Compatible Substrates | PVC, PET, Polystyrene (PS) |
| Blocking Resistance | Excellent (suitable for winding and stacking) |
| Regulatory Compliance (EU) | Reg. (EC) 1935/2004 and Reg. (EC) 2023/2006 (GMP) |
| Variant: SR-323 | Optimal Sealing Temperature: 80ºC |
| Variant: SR-323CRV | Optimal Sealing Temperature: 100ºC - 150ºC |
| Variant: SOL-227 | Optimal Sealing Temperature: 120ºC - 130ºC |
Logistics, Handling, and Technical Considerations
- Packaging Formats: Available in standard industrial drums (25 kg) and IBC totes (1000 kg) for high-volume production lines.
- Storage Conditions: Store in dry, well-ventilated facilities at temperatures between 5ºC and 30ºC. Protect from freezing and direct exposure to sunlight.
- Shelf Life: 6 to 12 months from the date of manufacture when kept in its original, unopened container under recommended conditions.
- Occupational Safety: Handle in areas with adequate ventilation. The use of standard PPE (protective gloves and safety goggles) is highly recommended. Always consult the Material Safety Data Sheet (MSDS).
- Operational Validation: It is imperative to adjust sealing temperature and pressure according to the specific substrate and packaging line speed. A joint customer validation plan is recommended to test die-cutting resistance, migration parameters, and the mechanical performance of the final packaging structure.