An analysis of the felting shrinkage of plain knitted wool fabrics

The effects of loop length, yarn linear density, cover factor, yarn twist, fiber diameter, and anti-felting treatment level on the felting shrinkage of both untreated and DC 109 resin treated plain knit wool fabrics are investigated. The standard laundering cycle, a Woolmark TM 31-5A wash cycle, is used to test felting shrinkage. The relationship between felting shrinkage and all the parameters selected is studied by multiple regression analysis. The results of the investigation show that the treatment with 4% DC109 resin produces better anti-felting properties. The results of the multiple regression analysis indicate that the major factors affecting felting properties are cover factor and loop length. Furthermore, fiber diameter and yarn twist also have a significant effect on felting properties.