Leather Water Vapor Permeability Testing Machine

The Leather Water Vapor Permeability Testing Machine measures the rate of water vapor transmission through leather or textile materials. This evaluation helps determine the material's ability to remove perspiration from the wearer’s skin, making it essential for footwear uppers, clothing, and performance textiles.

The machine features six separate test stations mounted on a rotary table. Each station holds a sample over a silica gel desiccant holder, which is weighed before and after the test to determine vapor permeability. The system includes a built-in timer, ventilation fan, and control panel for time setting and recording.

Standards Compliant

UNI EN IUP/15

UNI EN 13515

EN ISO 20344:6.6 IUP 15

BS 3144 Method 24

SLP 25

DIN 53333

ISO 17699

DIN 53 429

METODO 309 WI 009

Applications

Measurement of water vapor transmission in leathers and textiles used in footwear and apparel.

Evaluation of material’s ability to remove perspiration from the skin.

Quality control and R&D in footwear and textile manufacturing.

Assessment of moisture management properties in protective or performance materials.

Technical Features

Temperature Range: 20–60°C

Humidity Range: 40–95% RH (no-load)

Temperature Accuracy: ±0.5°C (no-load)

Humidity Accuracy: ±3% RH (no-load)

Chiller: Air-cooled, sealed compression type

Cooler: Fin-type condenser

Humidifier: Pot-type with burnout prevention

Heater: Fin-type radiator with overheat protection

Blower: Upper and lower fans

Air Speed Adjustment: 0.5–1.5 m/s

Rotating Frame: Two-stage upper and lower, 270 mm diameter

Indoor Dimensions: W400 × D360 × H500 mm

External Dimensions: W1100 × D550 × H1470 mm

Power Supply: AC 220V, 50Hz

Operation Principle

Fill each holder with silica gel and secure the test sample over the holder.

Weigh the complete assembly and place it on the rotary table.

The machine rotates the holders for 7–8 hours under controlled conditions (20°C, 65% RH).

Reweigh the holders to calculate water vapor transmitted, which reflects the material’s permeability.