The invention discloses a method for preparing a banana bast
fiber by adopting biological degumming, which is characterized by comprising the following steps of: preprocessing, inoculating, fermenting, inactivating,
stamping and postprocessing. The prepared banana bast
fiber has soft and loose appearance and uniform color and has no taste or obvious flaws; the
fiber length is 80mm-200mm, the fiber count is 300Nm-500Nm, the
breaking strength of fiber bundles is 3.5g / D-5.0g / D, and the residual gum content is 1.5 percent-3.2 percent. The biologically degummed banana bast fiber effectively removes the non-spinnable components of
colloid,
lignin,
hemicellulose and the like and keeps the
bacteria proofing, rapid
moisture absorption and release of the self characteristics of the fiber, thereby ensuring the strength of the fiber; meanwhile, the
banana fiber is kneaded and rolled by sterilization and machines before degumming, thereby ensuring the degumming effect and the smooth going of degumming and enabling the degummed fiber to be beneficial to the production and production development of the next working procedure.