A process of making polytrimethylene terephthalate staple fibers, including
(a) providing polytrimethylene terephthalate, (b) melt spinning the melted
polytrimethylene terephthalate at a temperature of 245-285.degree. C. into
filaments, (c) quenching the filaments, (d) drawing the quenched
filaments, (e) crimping the drawn filaments using a mechanical crimper at
a crimp level of 8-30 crimps per inch (3-12 crimps/cm), (f) relaxing the
crimped filaments at a temperature of 50-120.degree. C., and (g) cutting
the relaxed filaments into staple fibers having a length of about 0.2-6
inches (about 0.5-about 15 cm), and polytrimethylene terephthalate staple
fibers, yarns and fabrics. Further, a process of optimizing the crimp
take-up of a polytrimethylene terephthalate staple fiber including
determining the relationship between denier and crimp take-up and
manufacturing staple fibers having a denier selected based upon that
determination.
Um processo de fazer fibras de grampo do terephthalate do polytrimethylene, including (a) fornecer o terephthalate do polytrimethylene, (b) girar de derretimento o terephthalate derretido do polytrimethylene em uma temperatura de 245-285.degree. C. em filamentos, (c) extinguindo os filamentos, (d) extraindo os filamentos extintos, (e) frisando os filamentos drawn usando um frisador mecânico em um nível do friso de 8-30 frisos por a polegada (3-12 crimps/cm), (f) relaxando os filamentos frisados em uma temperatura de 50-120.degree. C., e (g) cortando os filamentos relaxados nas fibras de grampo que têm um comprimento de aproximadamente 0.2-6 polegada (sobre 0.5-about 15 cm), e as fibras de grampo do terephthalate do polytrimethylene, os fios e as telas. Mais mais, um processo de optimizing o take-up do friso de uma fibra de grampo do terephthalate do polytrimethylene including determinar o relacionamento entre o denier e o take-up do friso e manufaturar as fibras de grampo que têm um denier selecionou baseado nessa determinação.
