Why Uniform Drying Matters: A Key to High ODF Yield

In the production of Oral Dissolvable Film (ODF) products, drying is not just about evaporating moisture. It plays a key role in determining the film’s appearance, content uniformity, structural integrity, and storage stability. Especially for pharmaceutical and high-value nutritional films, the effectiveness of the drying system directly impacts regulatory compliance and commercial viability.

1. Quality Risks from Poor Drying

Improper drying paths can cause multiple issues, such as:

• Edge cracking, central bubbling, or discoloration on the film surface
• Migration or precipitation of active ingredients, leading to content inconsistency
• Sticking, cracking, or fragility during slitting and handling
• Reduced dosage stability and mechanical tension during storage

2. What Should an Ideal Drying System Offer?

To ensure uniform film thickness and dose distribution, an ODF drying system should meet the following criteria:

• Precise temperature control to avoid hot/cold spots
• Even wind speed and airflow to minimize film stress
• Natural temperature gradient rather than abrupt heating to reduce shrinkage
• Flexibility to adapt to different formulations

3. HUANGHAI’s Gradient Drying System

HUANGHAI adopts a gradient hot-air drying tunnel design that creates a temperature transition zone through physical structural engineering. Our drying solutions include:

• Single- or dual-channel modular configuration
• Independent wind duct control in each section for stable airflow and temperature
• Precision tension control and constant-speed feeding
• Energy-efficient design while meeting pharmaceutical-grade process requirements

Featured Products:
- MJ150 ODF Solvent-Based Transdermal Patch Film Making Machine
- MJ150-L ODF Film Coating Machine
- Explore Next-Generation ODF Solutions

Conclusion

In ODF production, drying isn’t just a routine step — it’s a critical determinant of whether the films meet specifications and regulatory standards. Choosing equipment with gradient drying, accurate air control, and optimized structural design is the cornerstone of every successful, compliant ODF project.