TESTING APPARATUS FOR TESTING AIR PERMEABILITY ON THICKNESS DIRECTION OF PLASTIC MATRIX, AND METHOD THEREFOR

摘要

A testing apparatus for testing the air permeability on the thickness direction of a plastic matrix. The apparatus comprises: a mold (1) constituted by at lease a cavity (10) and a covering plate, a loading apparatus (2), a temperature controlling apparatus (3), a vacuuming apparatus (6), and a flow detecting element (4). The covering plate is provided with an accommodating through-hole (113), an upper ventilation piece (13) and a lower ventilation piece (12) accommodated in the accommodating through hole (113). The loading apparatus (2) is pressedly arranged on the upper ventilation piece (13). A test specimen is laid flat between the upper ventilation piece (13) and the lower ventilation piece (12). An air inlet (102) and an air outlet (103) respectively are arranged on a cavity (10) in the upper and lower direction of the cavity (10) corresponding to the upper ventilation piece (13) and the lower ventilation piece (12). The inlet (102) is connected to the flow detecting element (4), the outlet (103) is connected to the vacuuming apparatus (6). Employment of the present invention allows for accurate testing of air permeability of pre-impregnated material on the thickness direction of the plastic matrix under different pressure and temperature conditions.