Characteristic Test（Ventilation Characteristic）
The ventilation characteristic of sheets for allowing air and humidity to pass through are investigated.
Moisture permeability test
The amount of moisture permeated per day per unit area of sheet is measured. This test is used to evaluate the characteristic of the condensation prevention function and absorbent material packages related to moisture.
Air permeability test
The time that elapses before 50cc,100 cc,300cc of air passes under a constant area and pressure. This test is used to evaluate the performance of different types of filters and breathing sheet materials.
