Influence of alkali deweighting on hydrophobicity of polyester fabric

To understand the influence of alkali deweighting treatment an on its hydrophobic treatment including hydrophobicity,wrinkle resistance,breaking strength,and whiteness of polyester fabric,polyester fabric was alkali deweighted firstly and then treated with polyacrylic acid,tetraethylorthosilicate,and octadecylamine.It was found that fabrics treated in 5% NaOH solution at 90 ℃ for 10 min have good wettability.Alkali deweighting treatment can reduce fabric weight,form pits on fiber surface,increase the space at interlacing point of fabric,and provide more reactive sites for the subsequent polyacrylic acid treatment.It was found that with and without alkali deweighting pretreating,polyacrylic acid-tetraethylorthosilicate-octadecylamine treated polyester fabrics showed different physical properties.The fabric subjectedt alkali deweighting pretreatment had higher static water contact angle(water would not soak fabric),higher breaking strength and larger wrinkle recovery angle than the one not subjected to alkali deweighting pretreatment.The whiteness of the both has almost no change.