EFFECTS OF DRYING CONDITION UPON THE FINE STRUCTURE OF VISCOSE RAYON

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Other Title
  • ビスコースレーヨンの乾燥条件と糸質の変化
  • (I) CHANGE IN SWELLING DEGREE AND IODINE SORPTION OF RAYON DURING DRYING
  • 第1報 乾燥の条件と膨潤度およびヨウ素吸着

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Description

A sample of fresh viscose rayon of water content of 220% was placed in a constant velocity air current and dried to various residual water contents R% and the changes in the swelling degree Q and the iodine sorption J were observed in reference to R and the air conditions.<br>Q and J decrease with decreasing value of R, and drop sharply when the combined water of cellulose begins to evaporate. Q and J at equivalent R are smaller when the rayon has been dried at higher temperature and in more humid air.<br>When these dried samples are placed for a month at 20°C and 65% RH, Q and J decrease further and the decrements are smaller as R becomes smaller. When R reaches the equilibrium moisture content corresponding to the air conditions, J does not change any more in the above conditioning at 20°C and 65% RH.<br>When the rayon which has been dried to the equilibrium water content corresponding to the air condition is immersed in water and dried again, Q and J change similarly as they do in the primary drying but less in degree.<br>The air condition: 15_??_80% RH at 60° and 90°C.

Journal

  • Sen'i Gakkaishi

    Sen'i Gakkaishi 18 (8), 657-662, 1962

    The Society of Fiber Science and Technology, Japan

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