HIGH STRENGTH FIBER MATERIAL FROM NATURAL FIBER, METHOD FOR PRODUCING IT AND ITS APPLICATION FOR PRODUCING COMPOSITE MATERIALS

摘要

1. A method of producing a fibrous material in which a material of natural fiber is dissolved using alkali, characterized in that the fibrous material is treated with an alkaline material without the application of mechanical stresses: a) at a temperature of 5 to 30 ° C and then b) at a temperature of 80 to 150 ° C and, if necessary, washed and / or dried. ! 2. The method according to claim 1, characterized in that the material from natural fiber is selected from a) seed fibers, in particular lint, cotton, kapok and poplar fluff, b) bast fibers, in particular sclerenic fibers, bamboo fibers, fibers (burning a) nettle, hemp, jute, flax and Chinese nettle, c) hard fibers, in particular sisal, kenaf and manila hemp, d) coconut palm fibers and e) grass fibers. ! 3. The method according to claim 1, characterized in that the natural fibers are selected from cellulosic fibers, in particular lint, cotton, bast fibers and sclerachema fibers, preferably from flax, hemp, nettle, Chinese nettle ramie, kenaf and jute, with particular preference flax or hemp. ! 4. The method according to claim 1, characterized in that the alkali is selected from an alkali metal hydroxide, in particular sodium hydroxide and potassium hydroxide, an alkali metal carbonate, in particular sodium carbonate and potassium carbonate, and an alkali metal phosphate, in particular trisodium phosphate and tripotassium phosphate, sodium hydroxide and trisodium phosphate being preferred. ! 5. The method according to claim 2, characterized in that the alkali is selected from alkali metal hydroxide, in particular sodium hydroxide and potassium hydroxide, alkali metal carbonate, in particular sodium carbonate and potassium carbonate, and slot phosphate