Application of vinyl nitrogen phosphorus flame retardants on silk fabric

For the purpose of exploring flame retardant effect of silk fabric grafted by the home-made vinyl phosphorus nitrogen flame retardant(PN),effects of process factors on silk fabric's grafting rate and relationship between grafting rate and flame retardant were investigated.Then the washing fastness,morphology of combustion carbon residue,element content of phosphorus-nitrogen and physical and dyeing performance of finished silk fabrics were observed and measured.The results showed that property of silk fabric's flame retardant grafted by PN was good and the limit oxygen index(LOI) increased with the grafting rate' s growth.The LOI achieved 31.2% with the grafting rate of 15.4% under this condition.The LOI was still 30.9% after washing for 50 times.