Fibrillation Of Lyocell Fabric Research And Evaluation

With the most potential fiber in 21st to its credit, Lyocell fiber is a kind of new type cellulose fabric. On the one hand, it has excellent performance, such as high dry and wet strength, high moisture absorption, high dyeing and biodegradability; on the other hand, its producing process is green and no population to environment. Though there is a high proportion of a highly oriented, crystalline region within the fiber, the lateral cohesion between the crystallites is week. When subjected under mechanical stress in swollen state, the fibers tend to produce surface fibrils. This wet fibrillation behavior can be manipulated to create a variety of finished high fashion apparel but this behavior also brings some disadvantage in the producing process.So far, there has been no any uniform criterion on the evaluation of the fibrillation degree of Lyocell fabric. "Rank-assessing of fibrillation" is developed in this paper to evaluate the fibrillation degree of fabrics which have been processed by different technologies. The fibrillation degree of the fabric is given by observing the top of fibers which are scraped from the fabric. This criterion can compare the fibrillation degree of fabrics which are treated by different secondary fibrillation process.The fibrillation treat includes the primary fibrillation, the enzyme clean and the secondary fibrillation. In this paper, the main parameters of the primary fibrillation were determined though four factors-three level experiment. The main parameters were as follows: processing temperature 100℃, processing time 90 minutes, pH 11and liquor ratio 1:20. The fabric can be imparted a good clean surface when the dosage of the enzyme is 2g/L and the processing time is 45 minutes.In the secondary fibrillation stage, the fabrics were treated though threemethods--fabric washing, washer washing and pilling. The fibrillation degree offabrics can reach the demand of fibrillation though washer washing and pilling treating, Japanese washing can't. The treating effect though pilling is better than washer washing.