Influence of alkali deweighting of anti-ultraviolet polyester filament fabric on its UV resistant property

For understanding the influence of pretreatment on UV resistant property of fabrics,polyester filament grey fabrics with different ultraviolet protection factors(UPFs),after going through scouring/alkali deweighting/setting,were used as specimens.The influence of deweighting percentage on UPFs,permeability,breaking strength,bending rigidity,thickness and wearability of the treated fabrics was analyzed through experiment.The results indicated that with the increase of treatment temperature,mass concentration of NaOH,duration time and liquid ratio,UPF of the fabrics is decreased,warpwise bending rigidity,breaking strength,wearability and thickness are also decreased,but permeability,hand feeling,luster and comfortability are improved.The alkali deweighting percentage should be controlled at the range of 15%～20% in order to obtain a fabric with good UPF and style.