Testing the waterproofness and breathability of PU coated Oxford cloth involves several standardized methods:
Water Column Test: This method measures the waterproofness of the fabric by determining how much water pressure it can withstand before leaking. A column of water is placed on the fabric, and the height of the water column (measured in millimeters) indicates the fabric's waterproof rating. Higher numbers suggest better waterproof performance.
Hydrostatic Head Test: Similar to the water column test, this method quantifies the fabric's ability to resist water penetration under pressure. The fabric is subjected to increasing water pressure until leakage occurs, providing a quantitative measurement of waterproofness.
MVTR (Moisture Vapor Transmission Rate) Test: This test measures the breathability of the fabric by determining how much moisture vapor can pass through it over a specific period. The higher the MVTR, the more breathable the fabric is, indicating its ability to allow moisture to escape while preventing water ingress.
Ret Test (Resistance to Evaporation): This method evaluates the resistance of the fabric to moisture vapor transfer. A specific amount of moisture is placed in contact with the fabric, and the rate at which it evaporates is measured. This helps assess how well the fabric allows sweat to escape.
AATCC Test Methods: The American Association of Textile Chemists and Colorists (AATCC) has standardized methods for testing water repellency and water resistance, such as AATCC 22 (Water Repellency) and AATCC 127 (Water Resistance). These tests provide reliable benchmarks for evaluating fabric performance.
EN 343 Standard: This European standard outlines testing methods for protective clothing against rain, including assessments for both waterproofness and breathability. It includes criteria for fabric performance under various conditions.
