| 摘要 |
<p>PURPOSE:To prevent discoloration of a cellulose based unwoven cloth even when the cloth is left alone at a high temperature in the air or under a wet condition for a long time by adding an amine salt to the unwoven cloth exceeding a specified weight. CONSTITUTION:In an unwoven cloth containing a cellulose based fiber, one kind or more of amine salts are contained at a rate of 0.015wt.% per the cloth. The discoloration of the unwoven cloth can be prevented as the cationic amine salts are adsorbed by an anionic cellulose active part to make an obstacle to an oxidizing substance such as molecular oxygen in the air so that the oxidation of cellulose can be checked remarkably. Any unwoven cloth is applicable only if it contains the cellulose fiber. Lysine hydrochloride is preferably selected as a primary amine, an alkyl diaminoethylglycine hydrochloride or the like as a secondary amine and cetylpyridinium chloride as a tertiary amine. The upper limit of the amount of addition determined optionally viewed from the safety and costs of the amine salts.</p> |
