(Part I.) The Fundamental Experiments on the Manufacture of Nylon Paper

The following results were obtained in consequence of the fundamental experiments on the manufacture of Nylon paper by using the traditional method of nagashi-zuki in order to make Japanese paper.1. Neri (obtained from the root of tororo-aoi) were preferred as the dispersing agent. N-methoxymethylated 6 nylon (type 8 nylon) emulsion were used as the bonding agent of nylon sheets.2. We employed nylon staple fiber of 15den. cut in various length (e.g.1, 3, 4, 5, 7 and 10mm) in making sheet of paper at 100kg/cm2 heat press using type 8 nylon as a bonding agent.Tensile strength gives maximum value at the fiber length of 4-5 mm, but decreases with increasing fiber length.3. “ Kamiko ” (Japanese paper clothes) in the Muromachi period and the Yedo period (1339-1867) is regarded as non-woven fabric using kazo of natural cellulosic fiber and neri as a dispersing agent, coating with konnyaku (a paste made from the starch of devil's tongue) and shibu the astringent juice of unripe persimmons as a bonding agent.These paper products were of two sorts : one was plain in color for the winter coats of popular use ; the other being made elegant looking by dyeing fancy figures upon like calico for the use of daimyos and the well.to-do. The distribution of kazo fiber length is the normal frequency distribution at the height of 10 mm. Tensile strength gives maximum value, blended with 20-30 mm cut to 7080%10mm cut fiber length.4. The weight of type 8 nylon remained in the sheet was measured, but were preferred 10-20%. The surface temperature of heated roller press was suitable 180-185°C at 50kg/ 30cm.