STUDY ON THE PROPERTIES OF ACID-MODIFIED MULTIFUNCTION COPOLYESTER FIBRE

Applying conventional analytical methods,the following results have been found:the satura-tion value of acid--modified multifunction copolyest fibre( acid-modified polyester fibre)is1.74,then this kind of fibre is good for being dyed medium and light colours with cationicdyes;its level of erystalization is lower than of PET fibre;the third monomer(SIPM)con-tent in the fibre will be reduced by about 8% by the "alkali treatment"in dyeing and finishingprocess:through measuring and analysing the dye-up-take curves of time and temperature ofdyeing the fibre with cationic dyes,we indicate the key factors in dyeing are the 100℃ dyeingtemperature and the time for heat preservation;moveover,adding sodium sulphate will help leveldyeing but lower the dye-uptake.

Applying conventional analytical methods,the following results have been foundrthe satura-tion value of acid-modified multifunction copolyest fibre (acid-modified polyester fibre)is 1.74,then this kind of fibre is good for being dyed medium and light colours with cationic dyes;its level of crystalization is lower than that of PET fibrc;the third monomer(SIPM) content in the fibre will be reduced by about 8% by the' alkali treatment' in dyeing and finishing process:through measuring and analysing the dye-up-take curves of time and temperature of dyeing the fibre with cationic dyes,we indicate the key factors in dyeing are the 100℃ dyeing temperature and the time for heat preservation;moveover,adding sodium sulphate will help level dyeing but lower the dye-uptake.