ビニロンの紡糸法に関する研究

第2報　原液にホウ酸を添加する紡糸実験

抄録

As it was stated in the previous report, the several properties of Vinylon were improved by adding boric acid to PVA spinning process. After the several experiments, it was found that the borated PVA spinning process could be easily applied to the industrial production.
Typical spinning condition is as follows: Spinning solution PVA 14% (P=1400) contained 0.8% boric acid/PVA at 80°C Coagulation bath Saturated (NH₄)₂SO₄ solution at 17_??_19°C pH value over 9.0 Bath length 1m. 1st Goddet 9_??_10m/min. 2nd Goddet 30m/min.
Stretching bath Satulated (NH₄)₂SO₄ solution over 90°C Bath length 2m. 3rd Goddet 60 m/min.
The feature of the fibre thus obtained is hollow inside.