Over the years, Yuzhimu nonwoven primary carpet backings have been constantly improved in order to meet the ever more stringent demands of carpet manufacturers and consumers. Of particular importance are: increasing the breaking strength and elongation at break after tufting, increasing the tear resistance after tufting and coating, generally improving the appearance of the resulting carpet, allowing effective mending of imperfections that occur during tufting, and facilitating tuft ability, i.e. by providing lower tuft-needle penetration resistance and reduced needle deflection during tufting, avoiding rough back stitch, increasing stitch lock, and reducing noise during tufting.