抄録
Many problems exist when creating teaching materials for the testing of thermal qualities of fibers through heating. For example, many clothes are necessary for burning for the purpose of the distinguishing the type of clothes, and therefore injurious gases which may affect the health of students were apt to break out during burning. In this report, by approaching the fiber to a hand-made heat source of the microscope stage the phenomena on cutting were observed, and the thermal quality of fibers could be presumed. This experiment showed that the distance from the fiber to the heat source was in inverse proportion to the softening point of the fiber. By observing the point of the cut fiber, it can be presumed that the fiber which formed a sphere at the point was produced by the melting of raw materials. The other fibers were produced by solving the raw materials with adequate solvent, and extending the fiber from the solution through a hole. These experiments showed that thermal quality and production of fibers can be understood from a molecule standpoint.
