Processing Study Of The Total Non-Chlorine Bleaching In Linen Fibre

This research introduce the method that chloride bleaching or other chemical methods degrade the lignin was replaced by the biology degradation in linen fabric technology. We studied the biodegradation capability of twelve epiphytes for lignin. White rot fungi 5.132 and 5.776 have the best ability to degrade both the lignin and the cellulose.We found that white rot fungi can degrade lignin in linen fabric in our experiment, so we thought that this technology could replace the existing chloride bleaching technology. During the biodegradation of lignin in linen fabric, the white rot fungi 5.776 had good adaptability and better degradation effect than 5.132. Therefore, we took white rot fungi 5.776 as the reagent.The best technology condition of biodegradation lignin of linen fabric is that time of bio-reaction is 72 hours, the time of first culture is 24 hours, the time of biodegrading lignin of linen fabric is 9 hours and stacking time is 12 hours. After lignin is biodegraded, the best bleaching technology of linen fabric is that the time of boiling NaOH is an hour, and the time of dipping in vitriol is 4-5 minutes, stacking time is an hour and bleaching used H₂O₂ at 70℃ is an hour. All of above technologies make the white degree of linen fabric is 87.60% and strength is 800N.There is no chloride during bleaching linen fabric, that is, in our study we use fungi to pretreatment and degrading lignin, and last use H₂O₂ to bleach it. This study filled the blank of total chloride free bleaching in the world weave industry.