Leather Water Vapor Permeability Tester

The Leather Water Vapor Permeability Tester measures the ability of leather and leather-like materials to transmit water vapor. By assessing the weight of water vapor that passes through the material per unit area and time, it evaluates the breathability and moisture transport performance of leathers, textiles, and composite materials. The instrument is equipped with multiple test stations, controlled ventilation, and precise timing for standardized laboratory measurements.

Application

(1) Testing leather used in footwear uppers to assess perspiration removal efficiency.

(2) Evaluating leather for clothing, gloves, and sports gear for breathability.

(3) Assessing coated or laminated leathers for moisture transport performance.

(4) Quality control of artificial leather and PU materials in fashion and automotive interiors.

(5) R&D for developing high-performance breathable leather and textile composites.

(6) Measuring vapor permeability of textile laminates, membranes, and hybrid materials.

(7) Comparative testing of leather treatments and finishing processes.

Standards

(1) UNI EN IUP/15 – Italian standard for testing puncture resistance of safety footwear.

(2) UNI EN 13515 – European standard specifying abrasion resistance tests for protective footwear soles.

(3) EN ISO 20344:6.6 – International standard defining puncture resistance testing methods for safety shoes.

(4) IUP 15 – Standard for evaluating puncture-resistant properties of footwear materials.

(5) BS 3144 Method 24 – British standard for abrasion resistance testing of leather and footwear components.

(6) SLP 25 – Standard protocol for assessing safety shoe durability under repetitive stress.

(7) DIN 53333 – German standard for puncture resistance measurements in protective footwear.

(8) ISO 17699 – International standard for footwear safety, including puncture and impact resistance.

(9) DIN 53 429 – German method for abrasion resistance testing of rubber and plastics in footwear.

(10) METODO - 309 WI 009 – Brazilian standard for puncture resistance evaluation in safety footwear.

Features

(1) Six independent test stations on a rotary table for parallel testing.

(2) Electronic timer for accurate test duration recording.

(3) Silica gel-based measurement system for precise water vapor absorption.

(4) Controlled fan blade rotation ensures uniform airflow across samples.

(5) Adjustable fan gaps and rotation speeds for testing standardization.

(6) Compact and robust frame for laboratory use.

Parameters

Parameter	Specification
Test Stations	6
Electronic Timer	Built-in, records test duration
Fan Blades	3
Fan Blade Dimensions	75 × 90 mm
Angle Between Fan Blades	120°
Fan Gaps	10 ± 5 mm
Fan Speed	1400 rpm
Specimen Rotary Speed	75 rpm
Sample Holder Diameter	30 ± 1 mm
Fixture Diameter	30 ± 1 mm, helical
Instrument Weight	45 kg
Overall Dimension	350 × 570 × 450 mm
Power Consumption	300 W

Accessories

(1) Silica gel desiccant for sample holders.

(2) Screw-top sample holders.

(3) User manual and calibration certificate.

Test Procedures

(1) Precondition the instrument in a controlled environment (20°C, 65% RH).

(2) Fill each sample holder with silica gel and weigh accurately.

(3) Place the leather or textile sample over the neck of the holder and secure with a screw top.

(4) Insert holders into the rotary table and lock in place.

(5) Start the fan and timer; allow testing to run for 7–8 hours.

(6) Remove holders and reweigh to determine water vapor absorption.

(7) Calculate vapor permeability based on weight gain per unit area and time.

Maintenance Information

(1) Keep fan blades and sample holders clean to ensure accuracy.

(2) Regularly check and replace silica gel desiccant.

(3) Inspect rotary mechanism and lubrication periodically.

(4) Avoid exposure to corrosive environments or excessive humidity.

(5) Verify electronic timer function and calibration regularly.

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