Radio frequency dryer RF

continuousfor the textile industryfabric

Product overview
Thanks to the ability of RF energy to penetrate thick and bulky products, stockings and tights, dyed and hydro-extracted before or after boarding and/or ironing, can be dried efficiently and uniformly when laid on the conveyor belt of the dryer as loose dozens or directly inside the dye-bags. They remain stationary and relaxed until the drying process is completed.

Drying performance and benefits
The product exits the dryer with the desired final moisture content (normally regain) and is cool enough to go immediately for packing. Because RF heating is selective toward wet areas, less evaporation occurs in the thinner leg areas and more in the wetter, thicker areas (toes, welts, seams and waistband), resulting in uniform drying across the whole garment.

Process control and applications
Accurate control of the water evaporation rate makes RF drying beneficial not only for stockings and tights sent directly for packing and distribution, but also for items that will undergo boarding or ironing after dyeing. These downstream operations are faster and more effective when the product has an initial moisture content around 7–8%: this ideal level can be obtained uniformly by partial RF drying starting from the typical 12–15% after centrifugal hydro-extraction.

Available sizes and capacities
A wide range of dryer sizes is available to meet different production requirements, from a few hundred dozens per hour (e.g., RF 10 kW model) up to several thousand dozens per hour (e.g., RF 60 kW model).

Technical specifications

• Brand: Stalam
• Application: Drying of stockings and tights (dyed and hydro-extracted)
• Technology: Radio Frequency (RF) dryers
• Handling modes: Laid on conveyor as loose dozens or dried inside dye-bags; product remains stationary during drying
• Selective heating: RF targets wet areas, promoting uniform drying across legs, toes, welts, seams and waistband
• Moisture control: Enables accurate control of evaporation rate and partial drying to target moisture (typical target for boarding/ironing: ~7–8%)
• Typical starting moisture after hydro-extraction: ~12–15%
• Output temperature: Product exits cool enough for immediate packing
• Capacity examples: RF 10 kW model ≈ a few hundred dozens/hour; RF 60 kW model ≈ a few thousand dozens/hour
• Technical documentation: technical data (PDF) available