Cellulose-Acetata Rayon

The textile fibres of commerce are very numerous. They are usually placed in " three natural classes, vegetable, animal and mineral. The rayon filaments so far produced are all vegetable. " Vegetable fibres can be classified as follows: - Seed fibres, growing from the seeds or seed-capsules of certain plants, as cotton, Bombax, Asselepias, etc. Stem fibres, growing in the bast of certain plants, as flax, hemp, jute, etc. Leaf fibres, occurring in the leaves of certain plants, including New Zealand hemp, Manila hemp, etc. Fruit fibres, of which the sole member worth mentioning is the cocoanut fibre. Artificial fibres, represented by viscose, cellulose acetate, cuprammonium and nitrocellulose rayon. The chief fibres in the animal class are wool, silk, and the various kinds of animal hair such as camel, llama, angora, rabbit, horse, etc. The chief member of the mineral group is asbestos, a substance that resists the action of fire. Gold, silver and copper used in the making of tinsel yarns are not fibres as they do not require to be spun. Cellulose-Acetata Rayon - Filaments composed of an acetic ester of cellulose coagulated or solidified from its solution. Cuprammonium Rayon - Filaments composed of regenerated cellulose which has been coagulated or solidified from a solution of cellulose in ammoniacal copper oxide. Nitro-cellulose Rayon (Chardonnet) - Filaments composed of regenerated or denitrated cellulose which has been coagulated or solidified from a solution of nitrated cellulose. Viscose Rayon - Filaments composed of a regenerated cellulose which has been coagulated or solidified from a solution of cellulose xanthate. The preceding four definitions are proposed by the American Society for Testing Materials, Corn. D-13