Structure and properties of industrial PET filaments

Microphotography,DSC,fiber and yarn tensile testers,and heat-shrink tester were used to analyze morphology, mechanical properties,shrinkage properties and thermal properties of three types of industrial PET filament.The results showed that the monofilament and multi-filament strength of HT is the largest among the three types of PET filaments,and breaking elongation is the smallest and modulus is in the middle.The boiling water shrinkage and dry-heat shrinkage rate of HT are also the greatest among the three types of industrial PET filaments.The melting temperature of HMLS and LS industrial PET filaments shows no obvious difference.The HMLS has the advantage of both HT and LS.