The demand for sustainable paper packaging is growing as businesses adapt to evolving packaging regulations and food-contact requirements. Water-based barrier coatings for paper packaging offer an alternative to conventional plastic laminations, helping packaging manufacturers develop paper-based solutions with functional water and grease resistance.
Melchers Vietnam introduces AQUALINE DFC BARRIER EMULSION (C/AL4333-60), a water-based barrier coating designed for paper food packaging applications, including trays, cups, bowls, and boxes. With its technical barrier properties and compatibility with selected post-printing processes, this coating supports manufacturers seeking functional and sustainable packaging solutions for export markets.
1. WHAT IS AQUALINE DFC BARRIER EMULSION?
AQUALINE DFC BARRIER EMULSION (C/AL4333-60) is a water-based barrier coating formulated for paper and paperboard packaging applications. According to the supplied product specifications, its formulation contains approximately 28% styrene-acrylic resin dispersed in a water-based system, alongside specialised surface additives.
The coating forms a continuous film on the paper surface to help resist water and grease penetration. This makes it a potential solution for packaging manufacturers producing paper-based food containers that require additional barrier performance.
Designed for use in printing and coating operations, AQUALINE DFC Barrier Emulsion can be evaluated for applications requiring functional surface protection and compatibility with selected downstream finishing processes.
2. KEY BENEFITS OF AQUALINE DFC BARRIER COATING
Water and Grease Resistance
AQUALINE DFC Barrier Emulsion is formulated to provide a barrier against water and grease on paper substrates. These properties can help improve the functional performance of paper packaging used for food service and takeaway applications.
The actual barrier performance depends on the paper grade, coating weight, drying conditions, and application requirements. Production trials are recommended to establish suitable operating parameters.
Food-Contact Compliance Documentation
For packaging intended for direct food contact, regulatory compliance is an essential consideration. The supplied product information references the following standards and guidelines:
- US FDA regulations: 21 CFR 176.105 and 21 CFR 176.180.
- European Framework Regulation EC 1935/2004.
- Swiss Ordinance requirements.
- Nestlé packaging guidelines.
- EuPIA Good Manufacturing Practice (GMP).
Manufacturers should review the current Technical Data Sheet (TDS), Safety Data Sheet (SDS/MSDS), and applicable declarations of compliance before selecting the coating for a specific food-contact application. Compliance depends on the intended use, substrate, coating conditions, and applicable regulatory requirements.
Heat Resistance for Food Packaging
The stated heat-resistance capability of the coating is up to 140°C. This property may be relevant for paper packaging applications exposed to elevated temperatures.
Actual performance should be verified under the intended conditions, including contact duration, food type, substrate structure, and the finished packaging configuration.
Compatibility with Post-Printing Processes
AQUALINE DFC Barrier Emulsion supports two-sided coating applications. After drying, the coated surface may be suitable for selected downstream processes, including gluing, hot stamping, and subsequent UV coating.
Compatibility depends on the coating formulation, ink system, substrate, and finishing equipment. Conducting a production trial is recommended before full-scale implementation.
Water-Based Formulation and Handling
The product has a reported pH range of 7.0–9.5 and a flash point above 100°C, according to the supplied technical information.
These characteristics support consideration of the coating in industrial printing and coating environments. However, the product’s handling, storage, and workplace safety requirements should always be determined from its current SDS and the manufacturer’s instructions.
3. AQUALINE DFC BARRIER EMULSION: TECHNICAL SPECIFICATIONS
The following table summarises the key technical parameters supplied for product code C/AL4333-60.
| Technical parameter | Specification |
|---|---|
| Product name | AQUALINE DFC BARRIER EMULSION |
| Product code | C/AL4333-60 |
| Coating type | Water-based barrier coating |
| Resin system | Styrene-acrylic |
| Viscosity (DIN 4 cup at 20°C) | 50–70 seconds |
| Solids content | Approximately 42% |
| pH value | 7.0–9.5 |
| Surface sheen at 60° | 70% on Gloss Art paper |
| Stated heat resistance | Up to 140°C |
| Recommended substrate | Coated paper and paperboard, from 115 gsm |
| Recommended application | Minimum two coating layers |
| Wet coating weight | 6–10 gsm per layer |
| Delivery stack temperature | Below 35°C |
| Recommended cleaning solution | Pulse PAA200 |
Important: These values are based on the supplied product information and should be confirmed against the latest official TDS before commercial publication or production use. Performance may vary depending on substrate and operating conditions.
4. APPLICATION GUIDELINES FOR PRINTING AND PACKAGING MANUFACTURERS
Correct application is essential to achieve consistent barrier performance. The following guidelines provide a starting point for evaluating AQUALINE DFC Barrier Emulsion on your production line.
Step 1: Prepare the Coating
Stir the coating thoroughly before use, following the manufacturer’s instructions. Do not mix it with other coating systems unless compatibility has been confirmed, as incompatible materials may destabilise the emulsion.
Step 2: Select a Compatible Printing Ink
Use an ink system with suitable alkali and solvent resistance to minimise the risk of colour changes or unwanted chemical interactions after coating.
The appropriate ink system should be verified through compatibility testing on the intended substrate.
Step 3: Optimise the Coating Weight
The supplied specifications recommend a minimum of two coating layers, with a wet coating weight of 6–10 gsm per layer.
The optimal coating weight will depend on the required water and grease resistance, paper absorbency, and production conditions. Test different settings to establish the best balance between barrier performance, drying efficiency, and material consumption.
Step 4: Control Drying Conditions
Ensure that the coating dries sufficiently before stacking sheets or winding material. The recommended delivery stack temperature is below 35°C.
Proper drying helps minimise blocking, maintain surface quality, and support consistent downstream processing.
Step 5: Validate the Finished Packaging
Before commercial production, evaluate the coated paper under actual application conditions. Testing should cover the relevant barrier properties, adhesion, print quality, gluing performance, and compatibility with subsequent finishing processes.
For food-contact applications, assess the complete packaging structure against the applicable regulatory requirements.
5. TECHNICAL TRIALS AND SUPPORT FROM MELCHERS VIETNAM
Selecting a suitable water-based barrier coating requires more than reviewing a product specification. Substrate characteristics, printing equipment, drying capacity, and the final packaging application all influence the results.
Melchers Vietnam supports printing and packaging manufacturers in evaluating AQUALINE DFC BARRIER EMULSION (C/AL4333-60) for their specific production requirements.
Our technical support programme can include:
- Product samples: Request a sample for preliminary evaluation, subject to availability.
- Technical documentation: Obtain the relevant TDS, SDS/MSDS, and available compliance documentation.
- On-site technical support: Discuss coating settings and production parameters with the Melchers Vietnam technical team, subject to arrangement.
- Application testing: Evaluate adhesion, water and grease resistance, drying behaviour, and compatibility with downstream processes.
These trials help manufacturers determine whether the coating meets their application requirements before moving to full-scale production.
6. REQUEST AQUALINE DFC BARRIER COATING SUPPORT
Are you looking for a water-based barrier coating for paper food packaging? AQUALINE DFC BARRIER EMULSION (C/AL4333-60) is a solution worth evaluating for paper and paperboard applications requiring water and grease resistance.
Contact Melchers Vietnam to discuss your substrate, coating equipment, packaging requirements, and technical trial options.
Our team can help you assess the product’s suitability for your printing and packaging operations and identify the next steps for application testing.
Contact Melchers Vietnam today to request technical information or discuss an AQUALINE DFC Barrier Emulsion trial.
English 
Vietnamese