Pineapple leaf fiber fine treatment method

A pineapple leaf fiber treatment method, comprising the following steps:

• (1) pineapple leaf fiber presoaking treatment:
• subjecting pineapple leaf fiber in a pretreatment solution to ultrasonic treatment, and then subjecting the pineapple leaf fiber to washing and dewatering treatment;
• the pretreatment solution is a sulfuric acid solution with mass concentration of 0.05˜1.00% with water, a temperature of 20˜80° C., and a bath ratio of 1:10˜1:20;
• an ultrasonic frequency of the ultrasonic treatment in step (1) is 20˜40 KHz and a time is 20˜120 min;
• (2) swelling treatment:
• putting the pineapple leaf fiber after pretreatment into a compound swelling additive solution for swelling treatment at a temperature of 20˜75° C., a PH value of 3˜10 and a reaction time of 20˜120 min;
• the compound swelling additive solution is a compounded solution by two or more agents selected from cellulase, hemicellulase, pectinase and non-ionic penetrating agent, with a dosage of 0.5˜2% of the weight of the pineapple leaf fiber, and a bath ratio of 1:10˜1:30;
• (3) degumming and bleaching treatment:
• subjecting the pineapple leaf fiber after swelling treatment to a chemical degumming treatment, then subjecting the pineapple leaf fiber to a washing and a dewatering, and then putting the pineapple leaf fiber into 5˜15% hydrogen peroxide to bleach for 20˜50 min at a temperature of 60˜95° C.;
• (4) oil feeding:
• soaking the bleached pineapple leaf fiber in a solution containing 0.5˜3% modified silicone oil agent for 1˜2 h at a soaking temperature of 30˜75° C.;
• (5) subjecting the treated pineapple leaf fiber to dewatering, shaking and drying to obtain the degummed pineapple leaf fiber;
• and
• (6) teasing:
• spraying an emulsifying oil agent on the degummed pineapple leaf fiber, the dosage of the emulsifying oil agent being 4%˜10% of the weight of the fiber, standing in a curing room for a curing time of 24˜96 h at a curing temperature of 35˜50° C.;
• and then performing mechanical teasing and extension refining to prepare the pineapple leaf fiber.