Industry-Verified Manufacturing Data (2026)

Drying Tunnel

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Drying Tunnel used in the Leather and Related Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Drying Tunnel is characterized by the integration of Heating Elements and Air Circulation Fans. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A controlled-environment chamber within leather processing systems that removes moisture from leather through heated airflow.

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Product Specifications

Technical details and manufacturing context for Drying Tunnel

Definition
A specialized component of the Integrated Leather Processing System designed to efficiently remove residual moisture from leather after wet processing stages. It creates a controlled thermal environment with regulated temperature, humidity, and airflow to ensure uniform drying without damaging the leather's structural integrity or surface quality.
Working Principle
Utilizes forced convection heating where heated air is circulated through the tunnel chamber. Leather moves through the tunnel on a conveyor system while temperature-controlled air flows across the material surface, evaporating moisture. The system maintains precise temperature gradients and airflow patterns to optimize drying efficiency while preventing case-hardening or uneven moisture removal.
Common Materials
Stainless steel, Insulation panels, Heat-resistant glass
Technical Parameters
  • Tunnel length typically ranges from 5,000-20,000mm depending on production capacity requirements (mm) Per Request
Components / BOM
  • Heating Elements
    Generate and maintain required temperature within the tunnel
    Material: Stainless steel sheathed heating coils
  • Air Circulation Fans
    Distribute heated air evenly throughout the tunnel chamber
    Material: Corrosion-resistant aluminum alloy
  • Temperature Sensors
    Monitor and regulate thermal conditions at multiple points
    Material: Stainless steel housing with ceramic insulation
  • Conveyor System
    Transport leather through the drying process at controlled speed
    Material: Heat-resistant stainless steel mesh
Engineering Reasoning
60-120°C air temperature, 0.5-3.0 m/s airflow velocity, 30-80% relative humidity
Thermal degradation initiates at 140°C leather surface temperature, structural failure occurs at 160°C for >15 minutes exposure
Design Rationale: Leather collagen denaturation at 140°C (glass transition temperature), protein chain scission at 160°C causing irreversible tensile strength loss
Risk Mitigation (FMEA)
Trigger Heating element PID controller integral windup
Mode: Thermal runaway exceeding 160°C chamber temperature
Strategy: Cascade control with secondary thermocouple feedback loop and hardware temperature limit switch at 150°C
Trigger Belt drive tensioner spring fatigue (σ_max > 0.8σ_yield)
Mode: Conveyor belt slippage causing uneven drying (Δt > ±5°C across width)
Strategy: Dual redundant tensioning system with strain gauge monitoring and automatic tension compensation

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Drying Tunnel.

industrial leather drying tunnel stainless steel drying chamber for leather heated airflow leather drying system leather processing conveyor drying tunnel temperature controlled leather drying equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Finishing Line
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 0.5 bar positive pressure
belt speed: 0.1-2.0 m/min adjustable
temperature: 40-120°C (typical leather drying range)
airflow rate: 100-500 m³/min (varies with tunnel size)
humidity control: 10-80% RH adjustable
Media Compatibility
✓ Full-grain bovine leather ✓ Sheep/goat nappa leather ✓ Vegetable-tanned upholstery leather
Unsuitable: High-solvent-content coated leathers (fire/explosion risk)
Sizing Data Required
  • Leather throughput (kg/hour)
  • Initial moisture content (%)
  • Required final moisture content (%)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Thermal stress cracking
Cause: Cyclic heating and cooling causing expansion/contraction stresses in metal components, exacerbated by rapid temperature changes or uneven heating zones.
Conveyor system bearing failure
Cause: High-temperature operation degrading lubricant properties, combined with particulate contamination from product residue entering bearing housings.
Maintenance Indicators
  • Irregular or fluctuating temperature readings across heating zones indicating burner/heat exchanger issues
  • Unusual grinding or squealing noises from conveyor drive mechanisms suggesting imminent bearing failure
Engineering Tips
  • Implement infrared thermography surveys quarterly to identify hot spots, cold spots, and insulation deficiencies before they cause component failure
  • Establish predictive maintenance program with vibration analysis on all rotating equipment and ultrasonic leak detection on air/steam systems

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems CE Marking - EU Machinery Directive 2006/42/EC ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials
Manufacturing Precision
  • Temperature uniformity: +/- 2°C across tunnel length
  • Belt tracking alignment: +/- 1.5mm from centerline
Quality Inspection
  • Thermal mapping verification test
  • Airflow velocity and distribution test

Factories Producing Drying Tunnel

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Feb 09, 2026
★★★★★
"Testing the Drying Tunnel now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from Singapore Feb 06, 2026
★★★★☆
"Impressive build quality. Especially the technical reliability is very stable during long-term operation. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Feb 03, 2026
★★★★★
"As a professional in the Leather and Related Product Manufacturing sector, I confirm this Drying Tunnel meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

13 sourcing managers are analyzing this specification now. Last inquiry for Drying Tunnel from Poland (1h ago).

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Frequently Asked Questions

What are the main benefits of using a drying tunnel in leather manufacturing?

Drying tunnels provide controlled, consistent moisture removal that prevents cracking and uneven drying, improves leather quality, increases production speed, and reduces energy consumption compared to traditional drying methods.

How does the conveyor system work in a leather drying tunnel?

The conveyor system moves leather hides or pieces through the tunnel at a controlled speed, ensuring even exposure to heated airflow throughout the drying process for uniform moisture removal and consistent results.

What temperature range is optimal for leather drying in these tunnels?

Optimal temperatures typically range from 40°C to 70°C (104°F to 158°F), depending on leather type and thickness. Temperature sensors maintain precise control to prevent damage while ensuring efficient drying.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Leather and Related Product Manufacturing sector.

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