ODF Coating Challenges for High-Viscosity and High-Load Formulations
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Introduction
With the rise of oral dissolvable films (ODFs) in both pharmaceutical and functional food sectors, the demand for high-dose, multi-ingredient formulations is growing rapidly. From nutrient-dense vitamin films to drug-loaded therapeutic films, one key question emerges: how can companies maintain dose uniformity while stably coating high-viscosity materials?
1. Technical Barriers in High-Viscosity Coating
- Poor flowability: Thick formulations can lead to uneven coating when traditional methods are used.
- Drying inefficiency: High solid content slows down water evaporation, increasing the risk of residual moisture.
- Dose uniformity risks: High load concentrations make batch-to-batch consistency more difficult to control.
2. Common Industry Pain Points
- Slot-die coating struggles with high-viscosity materials, causing nozzle clogging and poor layer uniformity.
- Drying speed vs. energy usage: high heat may degrade temperature-sensitive actives.
- Scaling up from lab to production often leads to significant formulation and performance deviations.
3. HUANGHAI’s Solution
- Patented Scraper Coating Technology: Adjustable micro-gap scraper ensures consistent spread of thick formulations.
- Gradient Hot-Air Drying: Optimized airflow design boosts drying efficiency while protecting active ingredients.
- Scalable Equipment Portfolio: MJ150-L for lab/pilot scale; MJ150 for high-volume commercial production.
Related product
MJ150 ODF & Transdermal Patch Film Making Machine
Doctor-blade coating, 0.2–5 m/min running speed, drying from room temperature up to 120 °C.
4. Regulatory & Quality Value
- Stable process reduces batch variation, facilitating registration and export compliance.
- Ensures high-performance membranes across nutraceutical and pharmaceutical segments.
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Conclusion
High-viscosity and high-load formulations represent a promising future for ODF development, but they demand more sophisticated coating strategies. With our scraper-based coating and energy-efficient drying systems, HUANGHAI delivers robust, scalable solutions to help you transition from lab to launch with confidence.
*Features patented hot-air drying technology (Academician Hou Huimin's patent CN201668734U), delivering higher heating efficiency and uniformity than oven heating.
Frequently Asked Questions
What is the difference between an ODF film and a transdermal patch?
Oral dissolving films (ODF) dissolve on or under the tongue within seconds to minutes; transdermal patches stick to the skin and release the API over hours to days. Both are made by solvent-cast film coating, and the MJ Pro coating platform can be built for either — the application is set before the machine is manufactured.
What output can I expect from Huanghai ODF machines?
MJ150-RD about 1,200 films per hour for formulation screening; MJ150-Lab 8,000–10,000 films per hour for pilot-scale work; MJ150 about 30,000 films per hour (Gen I) for commercial production. For packaging, the MJ180 cuts and packs about 11,900 films per hour (Gen I); the EZ320 (about 9,000 films per hour) is for food-grade films only.
What drying technology is used?
The MJ150 production line uses a patented hot-air parallel-flow drying tunnel (Academician Hou Huimin's patent CN201668734U). The MJ150-RD uses oven drying; the MJ150-Lab uses the same hot-air drying process as the MJ150.
Can Huanghai machines coat multi-formula (striped) films?
Yes. Huanghai's patent CN117323228A covers stripe coating that applies two formulations side by side in one pass, useful for fixed-dose combination films.
Verify our compliance credentials. Shanghai Huanghai Pharmaceutical Instruments is ISO 9001:2015 certified, and its dissolution, disintegration, hardness and friability testers carry CE marking. View our Certifications →
Explore Complete ODF & TDDS Manufacturing Solutions
Huanghai offers end-to-end ODF film production lines — from R&D (MJ150-RD / MJ150-Lab) to commercial manufacturing (MJ150). Designed for GMP production and to support 21 CFR Part 11 requirements.