A kind of preparation method of dope dyed elastic polyester fiber
An elastic polyester, dope dyeing technology, applied in the field of fiber dyeing, can solve problems such as difficult dyeing performance
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Embodiment 1
[0041] This example gives a preparation method of dope-colored elastic polyester fiber. In this method, the colorant and elastomer toughening agent are made into PET masterbatch, and then the PET masterbatch is added to the PET spinning dope for dope Coloring, and then directly prepare colored elastic polyester fiber by spinning;
[0042] The elastic toughening agent is ethylene-propylene copolymer PBE, melt index: 6000g / 10min; ethylene component: 15wt%; density: 0.861g / cm 3 ; Vicat softening point: 48 ℃.
[0043] The method specifically includes the following steps:
[0044] Step 1, PET pretreatment:
[0045] Dry the PET powder in an oven at 80°C for 8 hours, then raise it to 120°C and continue drying for 4 hours, so that the moisture of the PET powder after drying is below 80ppm, and the intrinsic viscosity of the PET powder is 0.65dL / g;
[0046] Step 2, prepare PET color masterbatch:
[0047] First, mix the coloring agent, coupling agent and antioxidant according to the...
Embodiment 2
[0065] This embodiment provides a preparation method of dope dyed elastic polyester fiber. The difference between this method and Example 1 is that the formulation of the PET color masterbatch is different. The PET color masterbatch in this embodiment is calculated by weight percentage. Made from the following raw materials, PET powder is 76%, coloring agent is 20%, toughening agent is 3%, antioxidant is 0.5%, and coupling agent is 0.5%.
Embodiment 3
[0067] This embodiment provides a preparation method of dope dyed elastic polyester fiber. The difference between this method and Example 1 is that the formulation of the PET color masterbatch is different. The PET color masterbatch in this embodiment is calculated by weight percentage. Made from the following raw materials, the PET powder is 74%, the coloring agent is 20%, the toughening agent is 5%, the antioxidant is 0.5%, and the coupling agent is 0.5%.
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