Preparation of polyester fibre from polyethylene terephthalate modified with caprolactam

Conclusions

A process for preparation of modified Lavsan fibre using caprolactam as the modifier has been proposed and has been checked out on the pilot plant of the Mogilevsk “Khimvolokno” Industrial Association.

The introduction of pentamethylene units into the polyethylene terephthalate macromolecules increases the ability of the fibre to sorb disperse dyes. The modified fibre can be dyed at 100°C without carriers, to a tone of medium intensity.

In technological processing of the modified polyester fibre, a decrease in thread defectiveness and breakage in the processes of spinning and weaving is observed. In physico-mechanical indices, the thread and finished semi-wool fabric conform to first grade material.

The authors express their thanks to coworkers of the Minsk worsted combine for processing the experimental lot of modified polyester.