Leather Water Vapor Permeability Tester
The vapor permeability of leather is evaluated by means of measuring the weight of water-vapor that permeates to specimen per unit time and per unit area. The main functional components includes: testing holder clamp, ventilation fan, control panel with functions of switch, time setting and recording.
The machine has six separate test stations on a rotary table and each one has a sample holder. Silica gel desiccant is placed in the holder and the test material is placed over the neck of the holder and secured by a screw top. After weighing each holder, complete with silica gel and sample material, the holders are placed and locked into the rotary mechanism. After 7-8 hours the complete holder is weighed again and the gained weight is used to determine the degree of permeability. It is essential that the entire operation is carried out in a conditioned atmosphere of 20°C and 65% per cent relative humidity. In addition to the standard equipment, the tester is also supplied with a built-in timer to record the number of hours that testing has been carried out.
Applications:
Leather Water Vapor Permeability Tester is mainly applicable to leathers and textiles used in footwear uppers and clothing where it gives a measure of the ability to remove perspiration from the surface of the wearer's skin.The tester is used to determine the amount of water vapour a material will transmit through its structure in a specified time.
Standards:
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
Technical Parameters:
| Parameter | Specification |
|---|---|
| Product Name | Leather Water Vapor Permeability Tester |
| Test Principle | Measures the amount of water vapor transmitted through a specimen per unit time and area |
| Test Stations | 6 |
| Timer Function | Electronic timer for recording testing duration |
| Fan Blade Quantity | 3 |
| Fan Blade Size | 75 × 90 mm |
| Fan Blade Angle | 120° |
| Gap Distance | 10 ± 5 mm |
| Fan Speed | 1400 r/min |
| Specimen Rotary Speed | 75 r/min |
| Sample Holder Diameter | 30 ± 1 mm |
| Fixture Diameter | 30 ± 1 mm, helical type |
| Test Duration | Approximately 7–8 hours |
| Test Environment | 20°C temperature, 65% relative humidity |
| Weight | 45 kg |
| Dimensions | 350 × 570 × 450 mm |
| Power Consumption | 300 W |
FAQ
(1)What is the purpose of this tester?
This tester is used to determine the water vapor permeability of leather and textile materials. It measures how much moisture can pass through a material within a specific period, providing information about breathability and moisture transfer performance. The results are useful for evaluating comfort-related properties of footwear, clothing, and other leather products.
(2)Why is water vapor permeability important for leather products?
Water vapor permeability affects the comfort and usability of leather products, especially footwear and clothing. Materials with good moisture transmission performance can help remove perspiration from the skin surface, reducing discomfort caused by moisture accumulation during long-term use.
(3)How does the test method work?
The test is based on measuring the weight increase of silica gel inside a holder after water vapor passes through the specimen. By comparing the weight before and after testing, the amount of moisture transmitted through the material can be calculated.
(4)How many samples can be tested at one time?
The equipment is equipped with six independent test stations, allowing multiple specimens to be tested simultaneously. This design improves laboratory efficiency and helps users obtain comparative data from different materials under the same testing conditions.
(5)What factors should be considered when using this tester?
Accurate results depend on proper specimen preparation, stable environmental conditions, and correct operation procedures. Testing should be performed in a controlled atmosphere, typically around 20°C temperature and 65% relative humidity, according to the applicable testing standard.
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