| abstract |
The method for measuring gas barrier properties of the present invention overcomes the problem that the evaluation of gas barrier properties varies depending on the amount of moisture absorbed by the plastic, and the gas barrier properties of plastic molded articles including containers can be measured regardless of the amount of moisture absorbed. The purpose is to measure with good response and accuracy. The gas barrier property measuring method of the present invention is a gas barrier property measuring method in which a gas analyzer measures a permeation amount of a measurement target gas that permeates a plastic molded body such as a plastic container, a plastic sheet, or a plastic film. It has the process of reducing the impurity concentration of a molded object, It is characterized by the above-mentioned. In this step, the plastic molded body is dried by irradiating the plastic molded body with ultraviolet rays, placing the plastic molded body in a reduced-pressure atmosphere, or discharging and washing the plastic molded body. A drying step is included. [Selection] Figure 6 |