Ramie degumming

Laboratories issued one on degumming of ramie 160). The latter investigation was conducted under contract with the Office of Naval Research. A critical survey of ramie by G. L. Carter and Paul M. Horton appeared in 1936 (154)-... 

China grass The stiff, dried, hand-cleaned but not degummed fiber of ramie Chinchona See cinchona. 

Ahmed, M. Chattopadhyay, S.K. Gaikwad, R.S. Dey, S.K. Characteristics of degummed ramie fibre and its cotton blended yarns., Indian Journal of Fibre Textile Research 29 (3) 362-365 (2004). 

Many raw fibers require degumming before they can be used. Conventional processes that remove plant gum from ramie and hemp use hot alkaline solutions, and these methods have high energy demands, of raising concerns about disposal methods. As an alternative, Kapoor et al. [83] evaluated the use of a polygalacturonase from a bacterium Bacillus sp. strain MG-cp-2) to degum ramie and hemp to produce cellulosic fibers. In experiments with ramie, a chemical treatment with 2% NaOH at 90°C for 8 h released 4.1... 

Kapoor, M., Beg, Q.K., Bhushan, B., Singh, K., Dadhich, K.S. and Hoondal, G.S. (2001), Application of an alkaline and thermostable polygalacturonase from Bacillus sp. MG-cp-2 in degumming of ramie (Boehmeria mivea) and sunn hemp Crotalaria juncea) blast fibers , Proc. Biochem. 36 (8-9), 803-807. 

Floridians found that hydrogen peroxide and lime could be used for degumming these are much less harmfiil than chlorine and sulfuric acid currently being used. In these regions ramie is locally spun and woven into... 

Although ramie fibre is usually degummed chemically, there have been promising developments in microbial degumming (retting). Additionally some researchers reports that the use of ultrasonic vibrations speeds up the degumming process. The enzymatic treatment seems to be promising. 

Minimum and maximum cellulose contents refer to decorticated and degummed ramie respectively. 

---