Test and evaluation of size permeability

Warp sedimentation method has been attempted to be applied in order to study and evaluate the permeability of size.The factors such as viscosity,temperature,pH value,penetrating agent,have been studied with relation to warp sedimentation time by testing the permeability of size into grey cotton warp.The results indicated that permeability of low viscose size can be well characterized by warp sedimentation method.The permeability of size into warps is greatly influenced by its viscosity,and the permeability of acidolyzed starch with low viscosity is linear correlated to its viscosity.The permeability of size is affected by temperature and pH value,that can change viscosity and interface.The permeability of low temperature,high viscose size is significantly improved by addition of penetrating agent(0.25%) without changing its viscosity.