Abstract
Melting behaviour of pleated portion of poly(ethylene terephthalate) (PET) fabrics was investigated by differential scanning calorimetry. Melting peak measured by high-speed scanning was used for analysis in order to avoid the reorganization of the higher order structure. Several characteristic values such as initial temperature of melting, enthalpy of pre-melt crystallization and peak size of melting peaks were correlated with the angles of pleats which were varied by changing annealing temperature. It was found that the melting pattern of permanent-pleated PET fabrics can be used as an index of pleat angles.
