Regenerated skin-core structure composite fiber and preparation method thereof
A composite fiber and regenerated leather technology, which is applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problem that the fiber fabric is difficult to achieve the excellent performance of wearing comfort, beauty and stiffness, and polyester staple filament has not been reported at home and abroad. , weak anti-ultraviolet ability and other problems, to achieve the effect of bright color, simple preparation process and avoid broken wire
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Embodiment 1
[0025] Example 1: A regenerated skin-core composite fiber and its preparation method
[0026] First, pour ethylene glycol and 1,3 propylene glycol depolymerized polyester bottle flakes into the self-made depolymerization kettle for depolymerization reaction. After the depolymerization reaction reaches 3 hours, the degree of depolymerization reaches 100%, and the reaction temperature is controlled at 150°C, add the treated titanium dioxide slurry, add antioxidant tris(2,4-di-tert-butylphenyl) phosphite, and decolorizer activated carbon to raise the reaction temperature in the kettle to 260°C, and carry out pumping Vacuum polycondensation, polymerized into a nanocomposite core layer polymer; extruded through a screw extruder at a temperature of 270°C, and entered into a spinning box through a metering pump, and the spinning temperature was set at 270°C.
[0027] The mass ratio of described ethylene glycol and 1.3 glycerol is 8:2.
[0028] The mass fraction of the core polymer i...
Embodiment 2
[0034] Example 2: A composite fiber with a regenerated skin-core structure and its preparation method
[0035] First, pour ethylene glycol and 1,3 propylene glycol into the self-made depolymerization kettle to depolymerize and recover polyester bottle flakes for depolymerization reaction. After the depolymerization reaction reaches 2 hours, the degree of depolymerization reaches 100%, and then add the treated Titanium dioxide slurry, adding antioxidant tetrakis [β-(3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, and decolorizing agent ion exchange resin to raise the reaction temperature in the kettle to 240 ° C, Vacuum polycondensation is carried out to polymerize into a nanocomposite core layer polymer; it is extruded through a screw extruder at a temperature of 260°C, and entered into the core layer of a spinning box through a metering pump, and the spinning temperature is set at 260°C.
[0036] The mass ratio of described ethylene glycol and 1.3 gl...
Embodiment 3
[0043] Example 3: A composite fiber with a regenerated skin-core structure and its preparation method
[0044] First, pour ethylene glycol and 1,3 propylene glycol into the self-made depolymerization kettle to depolymerize and recycle polyester waste silk for depolymerization reaction. After the depolymerization reaction reaches 1 hour, the degree of depolymerization reaches 100%, and the reaction temperature is controlled at 130 ℃, add titanium dioxide slurry with particle size less than 1um and stir for 20 minutes, add antioxidant 4,4'-thiobis(6-tert-butyl-3-methylphenol), and decolorizing agent ion exchange fiber The reaction temperature in the kettle is raised to 250°C, vacuum polycondensation is carried out, and the polymer is polymerized into a nanocomposite core layer polymer; it is extruded through a screw extruder at a temperature of 270°C, and enters the core layer spinning box through a metering pump. For spinning, the core layer spinning temperature is set to 280°C...
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