Introduction
In the modern pharmaceutical industry, the quality of tablets depends not only on their active ingredients but also on the manufacturing technology applied during production. One of the most important and widely used techniques today is tablet film coating technology. This solution helps enhance product stability, improve tablet appearance, and optimize the effectiveness and usability of pharmaceutical products.
With extensive experience in supplying pharmaceutical equipment, Tin Nghi Dac Pharmaceutical Equipment Co., Ltd. provides advanced machinery solutions for modern-standard tablet film coating processes, highlighted by its high-performance Film Coating Machine.
What Are Film-Coated Tablets?
Film-coated tablets are tablets whose surfaces are covered with a thin layer, typically made of a polymer-based film. This coating serves multiple functions: it makes tablets easier to swallow, protects the active ingredients inside, and can even help control how the drug is released within the body. In modern pharmaceutical manufacturing, most film-coated tablets are produced using specialized film coating machines.
This thin outer layer is known as the film coating — an advanced technology designed to protect the medication and enhance its overall effectiveness. With the continuous development of manufacturing technology and pharmaceutical machinery, film-coated tablet products are constantly improving in both quality and absorption efficiency.
To meet the growing demands of pharmaceutical production, Tin Nghi Dac Pharmaceutical Equipment Co., Ltd. provides high-performance Film Coating Machines suitable for:
- GMP-certified pharmaceutical factories
- Dietary supplement manufacturing facilities
- R&D laboratories
- Tablet contract manufacturing workshops
Benefits of Tablet Film Coating Technology
1. Protection of Active Ingredients
- Prevents tablets from absorbing moisture, oxidation, and light-induced degradation
- Enhances the chemical and physical stability of pharmaceutical products
2. Masking Unpleasant Taste and Odor
- Makes tablets easier to swallow, especially for bitter or unpleasant-smelling active ingredients
3. Improved Appearance
- Provides tablets with a smooth, glossy finish and uniform color consistency
4. Enhanced Mechanical Strength
- Reduces breakage and abrasion during packaging, handling, and transportation
5. Controlled Drug Release
- Immediate release
- Sustained/controlled release
- Enteric coating (intestinal-soluble coating)
Basic Steps of the Film Coating Process
1. Preparation of the Coating Solution
A coating solution is prepared using either ready-made formulations or custom-mixed coating materials.
2. Loading Tablets into the Coating Chamber
A batch of tablets is loaded into the film coating machine’s coating chamber.
3. Spraying and Drying Process
The machine sprays the coating solution onto the tablets while the coating pan rotates, allowing the tablets to tumble continuously in a controlled flow. At the same time, heated air is introduced into the system. The warm dry air rapidly evaporates the solvent as soon as the droplets contact the tablet surface, leaving behind solid polymers, plasticizers, and pigments that form a thin protective film around the tablets.
4. Cooling Stage
After the final coating layer is applied, the tablets are cooled to room temperature while still inside the machine. This allows the polymer film to fully cure and harden, ensuring coating stability and durability.
Modern Film Coating Equipment at Tin Nghi Dac Pharmaceutical Equipment Co., Ltd.
BASIC STRUCTURE OF THE MACHINE
- Film coating pan
- Film coating spray system
- Air supply and heating system
- Exhaust air system
- Control system
Special Structural Features
- The tapered section is equipped with an additional agitator paddle
- The agitator paddle extends into the straight cylindrical section of the rotating drum
- The rotating drum reverses direction during the discharge process
- Ensures complete product discharge with no material residue remaining inside the machine
Coating Pan
- A rotating drum used to contain the tablets during the coating process
- Designed in either a circular or polygonal shape, with air holes distributed around the pan wall
- Equipped with internal baffles that help tumble and mix the tablets evenly during coating
During the film coating process, the coating pan rotates at an appropriate speed. If the rotation speed is too high, it may cause tablet edge chipping or breakage. Conversely, if the speed is too low, the coating surface may become uneven.
The air holes on the surface of the coating pan allow smooth air circulation, enabling the tablets to be exposed to hot airflow from all directions (360 degrees), which helps the coating dry evenly across the tablet surface.
The internal baffle design inside the coating pan ensures that, as the pan rotates, the tablets tumble uniformly and move toward the center of the pan. This allows all tablets to receive consistent exposure to the coating solution, preventing uneven coating distribution.
Types of Coating Pans
Film Coating Spray System
- We use in-house manufactured spray guns optimized for advanced coating spray technology
- A peristaltic pump system is utilized to precisely control the coating solution feed rate
- The control panel automatically adjusts spray pressure and airflow rate, while displaying all operating parameters and system information in real time on the interface
Spray Nozzle Adjustment Knob
- Adjustment knob designed to regulate and reduce the coating solution flow rate
- Helps minimize intermittent spraying and ensures a more stable and uniform coating process
H24 Spray Gun (In-House Manufactured)
The in-house manufactured H24 spray gun is specially designed and optimized to deliver stable and consistent spraying performance during the film coating process.
BaoLi Spray Gun
DA-6 Spray Gun
Adjustment Knob for the DA-6 Spray Nozzle
- Designed to regulate and reduce the coating solution feed rate
- Helps minimize intermittent spraying and improves coating consistency during operation
Optimized according to actual production requirements.
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The three-channel spray gun structure ensures a uniform atomization spraying process.
- Each spray gun is supplied with coating solution independently to ensure a stable liquid flow rate.
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The special spray gun mounting design allows the spray height and spray angle to be adjusted according to the material load capacity.
Air Supply and Heating System
Air Filter (HEPA Filter)
- Removes dust particles and microorganisms before air enters the machine
- Ensures clean air quality in compliance with GMP standards
Air Blower
- Generates continuous airflow circulation throughout the coating process
- Allows adjustment of airflow volume and air distribution
Heating Element
- Heats the incoming air before it enters the coating chamber
- Supports efficient and uniform drying of the coating layer on the tablets
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Temperature monitoring system
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Humidity monitoring system
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Airflow monitoring system
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Dehumidification system
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Humidification system
Exhaust Air System
Exhaust Fan
- Generates suction force to remove air from the coating chamber
- Maintains continuous airflow throughout the coating process
Dust Filter (Dust Filter / Bag Filter)
- Retains and captures:
- Powder dust
- Fine particles generated from the tablets during operation
Control System
The control system utilizes a PLC integrated with an HMI touchscreen interface for equipment operation and monitoring.
The HMI interface displays key operating parameters such as rotation speed, temperature, airflow rate, and other process data. It also allows operators to configure, adjust, and monitor process parameters in real time, ensuring stable operation and precise process control.
Operating Interface
Film Coating Machine Models
Patent Certificate of Invention
Why Choose Tin Nghi Dac Pharmaceutical Equipment Co., Ltd.?
When investing in pharmaceutical manufacturing systems, choosing a reliable equipment supplier is a critical factor for ensuring production quality and operational efficiency.
Tin Nghi Dac Pharmaceutical Equipment Co., Ltd. is committed to:
- Providing consultation and customized solutions based on production requirements
- Supplying high-performance and high-quality Film Coating Machines
- Supporting installation, commissioning, and technology transfer
- Delivering dedicated warranty and after-sales services
- Offering competitive pricing with reliable product quality
Contact Us for Consultation on Pharmaceutical Film Coating Machines Supplied by Tin Nghi Dac
Contact Tin Nghi Dac Pharmaceutical Equipment Co., Ltd. today for detailed consultation on pharmaceutical film coating machines tailored to your production requirements. Our professional team is always ready to provide optimal solutions, fast quotations, and comprehensive support throughout your equipment investment process.
Tin Nghi Dac Pharmaceutical Equipment Co., Ltd.
Tax Code: 3703422032
Office phone: (+84)28 66719989
Mobile: (+84)329 280 289
Email: info@xinyite.com.vn
Address: 49C D11 Street, Group 18, Quarter 4, An Phu Ward, Ho Chi Minh City, Vietnam.
