Ramie cold pad-batch oxygen bleaching degumming process

• Main Authors: LIAO GUANGHUI, BIE XIAODONG, ZHANG XIAOZHU, YANG JIQIAN, LI WENCHENG, WANG HUI
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2019
• Subjects: CARBONISING RAGS TO RECOVER ANIMAL FIBRES; CHEMICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIALTO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

The invention belongs to the technical field of ramie fiber preparation, and provides a ramie cold pad-batch oxygen bleaching degumming process which includes the steps: (1) cold pad-batch oxygen bleaching pretreatment: mixing, soaking and pretreating raw ramie and degumming Kier boiling agents, and washing mixture to obtain pretreated ramie; (2) second souring: adding third sodium hydroxide intothe pretreated ramie to boil mixture, and beating the ramie to obtain beating and washing degummed ramie; (3) acid pickling and oil feeding. The degumming Kier boiling agents comprise first hydrogen peroxide, first sodium hydroxide and oxygen bleaching stabilizers, and pretreated working solution comprise non-silicon oxygen bleaching stabilizers, second hydrogen peroxide and efficient penetratingagents. According to the degumming process, ramie degumming finished product rate can be high, degumming sewage is easily treated, prepared ramie fibers are high in strength, less in defective gum, good in extensibility, simpl