Development of anionic polyester/polyamide microfibers

The magnesium tourmaline superfine powder/polyester composite polymer containing trace rare earth elements was produced by in-situ polymerization.The DTY anionic polyester/polyamide(70/30) microfibers were produced with POY-DTY two-step technology.The relationship between the technologic parameters and mechanical performance was discussed,the optimal technology was determined,and the anionic release rate of the fibers was tested.The results showed that polyester′s melting point was reduced due to the addition of anionic powders,and lower spinning temperature and speed should be adopted with the cross air blasting controlled at 0.5 m/s.The strength and breaking elongation of the anionic fibers were declined compared with those of the ordinary polyester fibers.The anionic release of the anionic microfibers with mass fraction of tourmaline 2.5% was up to 800 per cubic meter,that was 4 times as much as the anionic concentration in the park.