Factors influencing shrinkage of acrylic bulked top

To further satisfy the requirements on research and development of new products of customers,the stretch breaking method for tow-to-top converting was adopted.The factors influencing the shrinkage of acrylic bulked top were examined.The results show that the content of vinyl acetate(VA) in the polymer and the breaking elongation of the filament yarn are the main factors.Adjusting the technical parameters during the top formation process can reduce the variation of its shrinkage,and the influence value for the shrinkage of the bulked top is approximately 1%.Optimizing the process parameters for filament yarn production and its after-processing can stabilize the shrinkage and improve the bulking effect.