How Does PTFE Conveyor Belt Meet Performance Requirements for Food Drying?

Jiangsu Aokai New Materials – a source factory of PTFE high-temperature cloth – takes you through how high-performance PTFE conveyor belts have become key components in dehydration, drying and baking production lines in the food processing industry. Whether for fruit and vegetable dehydration, meat jerky baking, noodle air-drying or medicinal herb roasting, high-performance PTFE conveyor belts maintain stable operation under harsh conditions of long running time, medium to high temperature, high humidity and sticky materials, thanks to their unique physical and chemical properties. They provide targeted technical solutions to core pain points in the drying process, such as material adhesion, moisture erosion and insufficient ventilation.

1. Temperature Resistance and Thermal Stability of High-Performance PTFE Conveyor Belts

Food drying operations typically require conveyor belts to run continuously for hours in tunnel ovens or drying chambers at 50℃ to 180℃, posing severe challenges to the long-term heat resistance of the belts. With a composite structure of PTFE coating and high-strength fiberglass base fabric, high-performance PTFE conveyor belts feature an operating temperature range of -70℃ to 260℃. When exposed to long-term heat in drying tunnels, their elongation rate is controlled below 5‰, almost eliminating the need for mid-run shutdown and re-tensioning. In addition, the thin thickness and uniform thermal conductivity of these belts allow heat to efficiently penetrate the belt body and act on the bottom of materials, ensuring overall uniform drying.

2. Non-Stick and Release Properties of High-Performance PTFE Conveyor Belts

Materials in the early drying stage (such as sliced fruits and vegetables, minced meat slices, wet noodle dough) are rich in moisture, sugar and protein, and tend to stick to the belt surface during heating. The surface friction coefficient of high-performance PTFE conveyor belts is as low as 0.04 to 0.1, enabling complete release of materials even those with exuded syrup or gelatinized starch after dehydration. The low surface energy of these belts significantly reduces material tearing and residue buildup, greatly improving the integrity and yield of dried finished products. Compared with traditional materials, they keep the belt surface clean even in contact with highly viscous sugar-soaked materials.

3. Moisture Resistance and Anti-Corrosion Barrier of High-Performance PTFE Conveyor Belts

High-temperature water vapor in drying rooms and organic acids volatilized by some materials (such as prunes, tomatoes and hawthorns) threaten to corrode and hydrolyze conveyor belt substrates. The coating of high-performance PTFE conveyor belts offers strong chemical inertness and impermeability, effectively blocking moisture and acidic media from penetrating the internal fiberglass framework. This prevents sudden strength loss or delamination caused by internal moisture absorption, mold growth or fiber hydrolysis. As a result, these belts enjoy a significantly longer service life than non-fluorinated coated products in long-term humid and weakly acidic drying environments.

4. Customized Breathable Structure of High-Performance PTFE Conveyor Belts

Unlike closed flat belt surfaces, high-performance PTFE conveyor belts can be customized with open mesh structures of different mesh counts and pore sizes to suit drying processes. Mesh-type PTFE conveyor belts allow hot air to pass through the material layer from bottom to top, directly blowing the bottom of materials. For instance, 4×4mm mesh PTFE belts enable three-dimensional drying of dehydrated vegetables or medicinal herb leaves, improving drying efficiency by over 30% compared with solid flat belts. Both fine-woven belts for preventing fine powder from falling and large-aperture belts for maximum air permeability can be precisely selected to match the physical characteristics of food materials.

5. Hygienic Compliance and Easy Cleaning & Maintenance of High-Performance PTFE Conveyor Belts

For food safety, high-performance PTFE conveyor belts must comply with food contact certifications such as FDA or LFGB. After drying, sugar spots and protein residues hardened by hot air on the belt surface can be easily removed with a high-pressure water gun or a damp soft cloth. The non-stick surface greatly shortens cleaning time and downtime, effectively inhibiting microbial growth in belt crevices.

With systematic advantages in temperature resistance, non-stick performance, air permeability, corrosion resistance and easy cleaning, high-performance PTFE conveyor belts manufactured by Jiangsu Aokai New Materials perfectly meet the stringent requirements of modern food drying processes for conveying carriers. Customized surface solutions are available for food materials with different moisture, sugar and oil contents. Such professional adaptability makes them crucial to ensuring continuous operation of food drying lines, consistent product quality and reduced overall operation and maintenance costs.

The above information is provided by Jiangsu Aokai New Materials Technology Co., Ltd.

For detailed parameters, application scenarios and customized solutions of our full product range – including PTFE high-temperature cloth, PTFE high-temperature tape, PTFE high-temperature mesh belt, seamless belt for laminating machines, single-sided PTFE cloth, high-temperature resistant conveyor belts and high-temperature fiberglass cloth – please contact us via:

· Service Hotline:Mr. Guo 18944819998Mr. Liu 13705266308

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