X線 CT スキャナーによる巻取り内部の不均一性の解析
1989 年 43 巻 3 号 p. 276-283
詳細
1989 年 43 巻 3 号 p. 276-283
Paper rolls were analyzed nondestructively by a computerized tomographic (CT) system. The images of cross-sections of paper rolls were shown as faithfully as if they were observed by cutting them. The tomographic image density (CT value) of a cut paper sheet bundle was proportional to its sheet paper density.
In CD profiles of CT values of paper rolls, each had a different CD profile. A paper roll wound at higher tension has a poor CD profile of CT values, which indicated internal stress concentrated locally in the roll. The macroscale MD profile of CT values coincided well with the basis weight profile. The longrange MD profile of CT values decreased gradually from a surface to a core of a paper roll, which indicated that internal stress decreased from the core to the surfce.
