Asdjasdka
CHemistry project .....
CHEMISTRY INVESTIGATORY PROJECT
TOPIC:
RAYON FIBRE
BY:- VIKRAM RAO XII – B
OBJECTIVE OF THE PROJECT
This project is aimed at preparation of rayon thread from filter paper employing cuprammonium process
INTRODUCTION
Rayon is the oldest commercial manmade fiber. The U. S. Trade Commission defines rayon as "manmade textile fibers and filaments composed of regenerated cellulose". The process of making viscose was discovered by C.F.Cross and E.J.Bevan in 1891. The process used to make viscose can either be a continuous or batch process. The batch process is flexible in producing a wide variety of rayons, with broad versatility. Rayon's versatility is the result of the fiber being chemically and structurally engineered by making use of the properties of cellulose from which it is made. However, it is somewhat difficult to control uniformity between batches and it also requires high labor involvement. The continuous process is the main method for producing rayon. Three methods of production lead to distinctly different rayon fibers: viscose rayon, cuprammonium rayon and saponified cellulose acetate. Of the methods mentioned, the viscose method is relatively inexpensive and of particular significance in the production of nonwoven fabrics.
For a very long period of human history, man depended on natural elements to make fibers for clothing. These were natural fibers. However, with the technological advances many manmade synthetic fibers were developed. Man-made fibers have two main categories: One that are made from natural products (cellulosic fibers) and the other that are synthesized from chemical compounds (non cellulosic polymer fibers). Rayon fiber is a natural-based material made from the cellulose of wood pulp or cotton fiber. In fact, they are
CHEMISTRY INVESTIGATORY PROJECT
TOPIC:
RAYON FIBRE
BY:- VIKRAM RAO XII – B
OBJECTIVE OF THE PROJECT
This project is aimed at preparation of rayon thread from filter paper employing cuprammonium process
INTRODUCTION
Rayon is the oldest commercial manmade fiber. The U. S. Trade Commission defines rayon as "manmade textile fibers and filaments composed of regenerated cellulose". The process of making viscose was discovered by C.F.Cross and E.J.Bevan in 1891. The process used to make viscose can either be a continuous or batch process. The batch process is flexible in producing a wide variety of rayons, with broad versatility. Rayon's versatility is the result of the fiber being chemically and structurally engineered by making use of the properties of cellulose from which it is made. However, it is somewhat difficult to control uniformity between batches and it also requires high labor involvement. The continuous process is the main method for producing rayon. Three methods of production lead to distinctly different rayon fibers: viscose rayon, cuprammonium rayon and saponified cellulose acetate. Of the methods mentioned, the viscose method is relatively inexpensive and of particular significance in the production of nonwoven fabrics.
For a very long period of human history, man depended on natural elements to make fibers for clothing. These were natural fibers. However, with the technological advances many manmade synthetic fibers were developed. Man-made fibers have two main categories: One that are made from natural products (cellulosic fibers) and the other that are synthesized from chemical compounds (non cellulosic polymer fibers). Rayon fiber is a natural-based material made from the cellulose of wood pulp or cotton fiber. In fact, they are