Waterborne polyurethane resin for reverse gravure ink plays a decisive role in resolving the industry’s toughest challenges, including gravure cylinder clogging, poor film adhesion, and low composite peel strength. In the formulation and production of high-performance water-based gravure printing inks and reverse printing composites for flexible packaging (such as PVC and PET films), choosing the right polymer binder dictates not only line speed and print resolution but also post-lamination durability.
To address the demanding conditions of reverse printing composite and water-based PVC inks, Senova developed RS-T3062 waterborne polyurethane resin for reverse gravure ink. As an anionic waterborne polyurethane dispersion, RS-T3062 delivers excellent re-dissolution, outstanding gloss and color development, instant-drying properties, and superior heat-pressing composite fastness. It serves as a premium binder for high-performance waterborne gravure inks and printing varnishes.
1. Why Choose RS-T3062 Waterborne Polyurethane Resin for Reverse Gravure Ink?
While achieving zero VOC emission compliance, RS-T3062 waterborne polyurethane resin for reverse gravure ink offers four core technical advantages in printing and laminating processes:
- ✨ Excellent Re-dissolution, Prevents Cylinder Clogging RS-T3062 features outstanding re-dissolution properties. During high-speed gravure printing, dried ink in cylinder cells dissolves instantly upon contact with incoming wet ink, effectively preventing clogging or “dry-in” during machine stops or continuous runs to ensure crisp graphic details and dots.
- 🎨 Vivid Color Performance & High-Gloss Transparent Film With a transparent liquid appearance and low viscosity (<300 mPa.s), this waterborne polyurethane resin for reverse gravure ink offers superior pigment wetting and color development. It forms a smooth, high-gloss film that maximizes color vividness and depth in reverse-printed substrates.
- 🔥 150–180°C Heat-Pressing Composite Fastness & Fast Drying As an instant-drying resin, RS-T3062 exhibits strong printing fastness on PVC films. Under 150-180℃ heat-pressing composite temperatures, it delivers inter-layer composite fastness and peel strength specifically tailored for in-mold composite applications.
- 💪 High Tensile Strength & Superior Water Resistance Boasting an elongation at break of ≥700%, tensile strength of ≥ 35 MPa, and low water absorption of <3% (24 hours at 25°C), it endows ink films with exceptional flexibility, abrasion resistance, and moisture durability.
2. Principais cenários de aplicação
RS-T3062 waterborne polyurethane resin for reverse gravure ink is widely used in industrial printing applications demanding high adhesion, vivid color, and strong composite fastness:
2.1 PVC Film Waterborne Inks & In-Mold Composite
- PVC Gravure Reverse Printing Inks: Specially designed for in-mold heat-pressing composite on PVC films. It resists delamination and discoloration under 150-180℃ heat pressing while maintaining high graphic fidelity.
2.2 Gravure Printing Varnishes & Protective Coatings
- Waterborne Printing Varnishes: Provides printed surfaces with high gloss, a smooth feel, and effective water and scratch protection.
2.3 Clothing Fabric Coatings & Specialty Inks
- Textile & Fabric Coatings: Leverages high elongation (≥ 700%) and high tensile strength as a smooth, waterproof coating binder for premium apparel fabrics.
3. RS-T3062 Technical Data Sheet (TDS)
| Physical & Chemical Properties | Standard Specification Values | Application Guidelines |
| Componente | Anionic water-based polyurethane dispersion | Compatibilidade: Anionic system; do NOT mix with non-anionic resins or adhesives of different properties. |
| Aparência | Líquido transparente | Storage: Store between 5-30℃. Avoid freezing, high temperatures, and direct sunlight. |
| Conteúdo sólido | 38.5 ± 1% | Atualização de dois componentes: For high water resistance requirements, add 1% to 5% curing agent and apply immediately after mixing. |
| Valor do pH | 6.0- 8.0 | Drying Characteristics: Instant-drying type, ideal for high-speed gravure lines. |
| Break Elongation | ≥ 700% | Composite Temperature: Optimal heat-pressing composite temperature is 150- 180℃. |
| Resistência à tração | ≥ 35 MPa | Módulo |
| Absorção de água | < 3% (24h, 25℃) | Viscosidade |
4. Performance Testing and Processing Guidelines
To ensure maximum performance when formulating with waterborne polyurethane resin for reverse gravure ink, follow these technical recommendations:
4.1 Evaluating Re-dissolution Speed on Gravure Cylinders
To evaluate the re-dissolution of RS-T3062 waterborne polyurethane resin for reverse gravure ink, apply a 15-micron wet film onto a glass plate or chrome cylinder surface and let it air-dry for 3 to 5 minutes until a dry touch is formed. Place a drop of fresh ink or water-alcohol solvent mix onto the dried film. Complete dissolution within 3 to 5 seconds confirms optimal re-dissolution, preventing cylinder blocking during print pauses.
4.2 Optimizing Heat-Pressing Lamination Fastness
When processing reverse-printed PVC film for in-mold composite molding, dry the printed ink layer thoroughly at 60–80°C before lamination. Apply a hot-melt or polyurethane composite adhesive, then press at 150-180℃ under 0.4–0.6 MPa pressure. The cured RS-T3062 waterborne polyurethane resin for reverse gravure ink matrix locks firmly onto the substrate, ensuring high peel strength without bubble formation or edge lifting.
4.3 Viscosity and pH Control in Continuous Printing
Maintain the pH of the ink system between 7.5 and 8.5 during long print runs. If the pH drops due to amine evaporation, re-dissolution may decrease. Add small amounts of water-soluble neutralizer or alcohol co-solvents (such as ethanol or isopropanol at 5–10%) to adjust viscosity and flash-off speeds according to press conditions.
5. Pigment Dispersion Synergy & Formulation Support
In formulating high-color, fast-redispersing waterborne polyurethane resin for reverse gravure ink, pigment wetting and rheology control play an equally vital role.
To prevent settling or flocculation in waterborne color pastes during storage, pair this resin with hyperdispersants, wetting agents, and defoamers from our sister site www.rk-chem.com. High-efficiency additives work synergistically with RS-T3062 to maximize ink levelling, color saturation, and cylinder re-dissolution.
Request a free lab testing sample of RS-T3062, a complete TDS report, or starting formulation support by reaching out to our technical team: senova-chem.com/contato.