| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for speedily measuring the concentration of additives in a polyolefin-basis resin, a method for adjusting the concentration of the additive, and a method for manufacturing a composition formed of the polyolefin-based resin and additives with a desired additive concentration. SOLUTION: In the method for measuring the concentration of the additives in the polyolefin-based resin, the method for adjusting the concentration of the additive, and the method for manufacturing the composition formed of the polyolefin-based resin and additives of desired additive concentration, the correlation predetermined by a multivariate analysis method from the known concentration of the additive and each absorbance obtained by the measurement in wave numbers by every 20 cm-1 or less in the near-infrared region (4,000-12,500 cm-1) through the use of an infrared spectrophotometer is applied to measure the concentration of the additives in the polyolefin-bases resin from the measured values of the absorbance.</p> |
