綿布の硬化に対するスメクタイトの防止作用
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概要
- 論文の詳細を見る
Solidification of cotton fabric resulting from rinsing and drying processes was studied by means of apparent density measurements on disk-formed cotton fiber, conductometry of rinsing liquors, and electron microscopy of smectite flakes and cotton fibers. Loose cotton fibers collected by cutting a towel was used as the model sample for the cotton fabrics. The rinsing of the sample by city water brought the highest apparent density at dried state. The lowest apparrent density was obtained in the case of rinsing the sample with commercial softening agent. Smectite suspensions yielded the intermediate values of apparent density between them. In the case of rinsing with distilled water, the apparent density decreased accordingly with the increasing volume of the rinsing liquor. Electron microscopy of the smectite flakes associated with cotton fibers showed preferential contamination with many fine particles which originated from impurities in the city water used for rinsing liquor. Considering the drying process, it is elucidated that the solidification of cotton fabric is developed by solid bridge formation between the fibers. The solid bridges mainly originated from the impurities in the residual rinsing liquor in the fabric. For smectite and commercial softening agent, the following effects are demonstrated : Smectite prevents the solid bridge formation between the fibers precipitating particularly the impurities in the residual rinsing liquor at its own surface. The commercial softening agent, as the drying process proceeds, gather the residual rinsing liquor into the small pores in the fabric, at which the impurities accumulate resulting a bridgeless fabric.
- 日本粘土学会の論文
- 1993-12-30