Author: Site Editor Publish Time: 2021-04-22 Origin: Site
The manufacturing of rayon fabric Process
While there are numerous variations in the production procedure that make use of the adaptability of the fiber, the following is a description of the treatment that is utilized in making regular or viscose rayon.
No matter whether wood pulp or cotton linters are utilized, the fundamental raw material for making rayon should be processed in order to extract and purify the cellulose The resulting sheets of white, purified cellulose are then treated to form regenerated cellulose filaments In turn, these filaments are spun into yarns and ultimately made into the wanted fabric.
Processing purified cellulose
⦁ Sheets of purified cellulose are soaked in caustic soda, which produces sheets of alkali cellulose. These sheets are dried, shredded into crumbs, and after that aged in metal containers for 2 to 3 days. The temperature level and humidity in the metal containers are thoroughly managed.
⦁ After aging, the crumbs are integrated and churned with liquid carbon disulfide, which turns the mix into orange-colored crumbs called sodium cellulose xanthate. The cellulose xanthate is bathed in caustic soda, leading to a viscose solution that looks and feels similar to honey. Any dyes or delusterants in the design are then added. The syrupy solution is filtered for foreign substances and kept in barrels to age for 4 to 5 days.
⦁ The viscose solution is next made into strings of fibers. This is done by forcing the liquid through a spinneret, which works like a shower-head, into an acid bath. If staple fiber is to be produced, a big spinneret with big holes is utilized. If filament fiber is being produced, then a spinneret with smaller-sized holes is utilized. In the acid bath, the acid coagulates and solidifies the filaments, now called regenerated cellulose filaments.