Factors Affecting Interfacial Bonding Fastness between Two Components of PTT/PET Bi-component Filament

抄録

Due to the component separation, the elasticity of polytrimethylene terephthalate/polyethylene terephthalate (PTT/PET) side-by-side bi-component filament decreased dramatically. Analysis shows that the bonding fastness between two components of PTT/PET filament is closely related to the copolyesters and recrystallization which produced in the interface during spinning process. Covalent bonds of copolyster can greatly strengthen the bonding and two kinds of molecular chains are locked together by recrystallization. The interfacial bonding with less copolymer and recrystallization can be destroyed by the extreme alkaline environment of dyeing and finishing processes, leading to the loss of filament elasticity. Besides, the location and duration for PTT and PET fluids to contact and cooling rate are factors which influence the generation of copolyester and recrystallization in spinning process.