LFY-265B Leather Dynamic Waterproof Performance Tester (Maeser)

Primary use

Testing the dynamic waterproof performance of leather (repeated angular compression method - Mezei method).

Technical indicators

1. V-shaped fixture: The spacing between the fixtures is (63±3) mm, fixed on the same horizontal line, used for clamping the specimen, including the following parts: the outer component, consisting of a "V"-shaped part with an inner angle of (31±1)° and an inner curvature radius of (7.5±0.5) mm; the inner component, whose shape and size should match the outer component.

2. Movable clamp: It can rotate around the center point X with an angle of (32±2)°.

3. Mobile clamp driving device: enables the mobile clamp to perform simple harmonic vibration toward the fixed clamp with a frequency of (90±5) times/min, equipped with a vibration counting device for the mobile clamp.

4. Container: Used to add water (or electrolyte), ensuring a measured amount of water or electrolyte is placed around both fixtures, with the water level adjustable to the required height for the test.

5. Electronic detection system: It contains a high-potential electrode and a normal electrode. When water infiltrates, the resistance between the electrodes drops to 50,000 Ω, and the test is terminated.

6. Magnetic stainless steel balls, approximately 3mm in diameter, oil-free, silicone-free, and rust-free.

7. The mold knife has an inner wall of a square measuring (100±1) mm × (100±1) mm.

8. Three pre-stretched polyester ropes with a diameter of 9.5mm, dynamometer: range of 0-1000N, accuracy of ±1N, angle iron frame height of 2m.

Applicable standards

GB/T 22890.2-2024 Leather—Determination of water resistance of flexible leather—Part 2：Repeated angular compression（Maeser）

ISO 5403-2、SATRA-PM34、ASTM D2099