Novel elastic fiber and preparation method thereof
An elastic fiber and composite elastic fiber technology, applied in the field of polyester fiber, can solve the problems of inability to spin smoothly, two components crack, spinneret corners, etc., and achieve controllable elasticity, good moisture absorption and perspiration function, diameter The effect of a large degree of orientation
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Example Embodiment
[0032] Example one
[0033] Take the preparation of PET / PTT side-by-side composite fiber as an example.
[0034] Raw materials and specific indicators:
[0035] PET chips: intrinsic viscosity 0.65dl / g, melting point 260℃
[0036] PTT slices: intrinsic viscosity 0.80dl / g, melting point 230℃
[0037] Spinning process conditions:
[0038] The PTT chips with an intrinsic viscosity of 0.80dl / g are kept under low dew point hot air at 120~140℃ for 8~12h, and the PET chips are dried; the two types of chips are respectively sent to the twin-screw extruder for melt extrusion. Two sets of metering pumps are used for the melts of the two components respectively. They enter the composite spinning assembly through the melt pipeline and are ejected from the spinneret. After cooling by blowing, they are drawn, heat-treated and wound, and finally obtained as figure 1 The side-by-side composite fiber shown. Among them, the use of image 3 The spinneret with spinneret micropores in the arrangement shown,...
Example Embodiment
[0044] Example two
[0045] Take the preparation of ECDP / PET side-by-side composite fiber as an example.
[0046] Raw materials and specific indicators:
[0047] ECDP chips: intrinsic viscosity 0.50dl / g, melting point 250℃
[0048] PET chips: intrinsic viscosity 0.65dl / g, melting point 260℃
[0049] Spinning process conditions:
[0050] The ECDP slices with an intrinsic viscosity of 0.50dl / g are kept under low dew point hot air at 100°C for 8-15 hours, and the PET slices are dried; the two slices are fed into the twin-screw extruder for melt extrusion, two groups Two sets of metering pumps are used to separate the melt into the composite spinning assembly through the melt pipeline and ejected from the spinneret. After cooling by blowing, it is drawn, heat-treated and wound, and finally obtained as figure 2 Side-by-side composite fiber shown. Among them, the use of Figure 4 The spinneret with spinneret micropores in the arrangement shown, the cross-sectional shape of the spinneret mi...
Example Embodiment
[0056] Example three
[0057] Take the preparation of low-viscosity PET / high-viscosity PET parallel composite fiber as an example.
[0058] Raw materials and specific indicators:
[0059] Low viscosity PET chips: intrinsic viscosity 0.67dl / g, melting point 245℃
[0060] High-viscosity PET chips: intrinsic viscosity 0.869dl / g, melting point 253℃
[0061] Spinning process conditions:
[0062] The high-viscosity PET chips with an intrinsic viscosity of 0.869dl / g were vacuum dried at 120°C, 2h, and 150°C, 4h, and the low-viscosity PET chips were dried; the two types of chips were sent to the twin-screw extruder for melt extrusion. Two sets of metering pumps are used for the melt of the two components, and the melt pipe enters the composite spinning assembly and is ejected from the spinneret. After cooling by blowing, it is drawn, heat treated and wound, and finally obtained as figure 2 The side-by-side composite fiber shown. Among them, the use of Figure 4 The spinneret with spinneret m...
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