ガンピ繊維の高収率蒸解について

抄録

Bast fibers of Ganpi plant (Wickstroemia sikokiana.) were cooked with ammonium oxalate, sodium bicarbonate, sodium carbonate and sodium hydroxide to yield the four kinds of pulp. The bleaching and beating properties of each pulp and the physical properties of the paper made with it were tested.
Using ammonium oxalate as cooking reagent, an excellent pulp is produced with a good yield amounting to 83.7%.
The pulp prepared by the cooking with ammonium oxalate shows good beating properties and strong paper may be produced, but the lignin content of the pulp is somewhat higher.
Sodium hydroxide is found to have the most effective properties to delignify and to remove hemicelluloses, but the yield of the pulp is low.
The chemical components of hemicelluloses extracted from each kind of pulp was studied by paper partition chromatography.
The characteristic properties of the hemicelluloses of the Ganpi bast fibers is found in the chemical structure constituted from D-xylose, 4-O-methyl-D-glucuronic acid and D-galacturonic acid. It is found that hemicelluloses resist appreciably the neutral and alkaline cookings and remain in the pulp and paper.
The paper making properties of the hemicelluloses is discussed.