Multi-Formula Coating for ODFs: Tackling Combination Drug Challenges
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As Oral Dissolvable Films (ODFs) expand their role in both pharmaceuticals and functional supplements, multi-ingredient formulations have become a key development trend. Whether it’s drug combinations or synergistic nutrition (like vitamins and minerals), ensuring stable, uniform distribution of multiple actives on a single film presents a serious technical challenge.
Industry Pain Points
Traditional single-solution coating methods face the following limitations when formulating multi-ingredient ODFs:
- Incompatible solubility leads to sedimentation or phase separation
- Uneven API distribution affects dissolution curve consistency
- Formulation ratios become unstable during scale-up
- Cross-interactions between actives hinder quality and compliance
These issues severely limit the industrialization of combination ODFs. In pharma registration, poor dissolution consistency can directly lead to rejection.
HUANGHAI’s Multi-Formula Coating Solution
HUANGHAI has developed a patented stripe-style multi-formula coating process that enables precise zone-based coating on a shared substrate:
- Independent Zones: Physically separate each formulation area to prevent cross-contamination
- Blade-Type Coating: Doctor-blade coating for uniform film thickness
- Flexible Design: Applies two formulations side by side in one pass (patent CN117323228A)
- GMP Compatibility: Enables consistent, repeatable results for registered drug products
This technology is ideal for formulation screening during pharmaceutical R&D, as well as functional food innovation at lab and pilot scale.
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.
Patent Backing
This coating method is protected under Chinese patent CN117323228A, viewable on Google Patents.
Recommended Equipment
- MJ150-L ODF Coating Machine – For small- and medium-scale production
- MJ150 ODF Coating Machine – For commercial-scale manufacturing
Conclusion
Combination ODFs are driven by real-world market needs, but demand robust technical execution. HUANGHAI’s multi-formula coating innovation provides a scalable, compliant solution from formulation to registration—making “multi-API, one film” a commercial reality.
*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.
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.