Metod and apparatus for continuously producing clouring polyester

[0017] Example 1

[0018] Use terephthalic acid and ethylene glycol as raw materials for esterification reaction at a temperature of 200-260℃, and then carry out a recondensation reaction at a temperature of 280-300℃ and a vacuum of less than 300Pa to continuously produce poly-p-phenylene with a viscosity of 0.655 Ethylene glycol dicarboxylate (abbreviated as: PET) melt. The polyethylene terephthalate melt in the continuous polymerization equipment 1 is fed through the main pipeline 2 at a rate of 1000 kg/h at a temperature of 220-320°C (for example, 220°C, 240°C, 280°C, 320°C) Co-mixing device 3, while branch pipe 4 feeds polyethylene terephthalate into screw mixer 5, the supply amount is 5kg/h; cyan dye powder (functional particles) (or iron oxide red, medium chrome yellow) , Titanium white or cobalt black, phthalocyanine green, toluidine purple dye) first add dispersant polyethylene glycol (or trimethylolethane, metal stearate, polyvinylpyrrolidone, aluminum titanium composite coupling agent) Pulverize and disperse in the flat jet powder pulverizer 12, and then add it to the screw mixer 5, the supply amount is 5kg/h, and the color masterbatch is mixed, and the color masterbatch further enters the blending device 3 for blending After treatment, a colored polyester was obtained. The blending temperature in the blending device 3 was 290°C. The content of cyan dye in the functional polyethylene terephthalate (colored polyester) is about 0.5%, and the amount of dispersant is 0.1 of the total amount (weight) of the three raw materials of polyester, pigment and dispersant. ~5% (e.g. 0.1%, 2%, 5%). Then, ordinary spinning machines are used for conventional spinning and drawing processes to produce colored fibers.

[0019] Example 2: The preparation process is the same as that of Example 1, except that the supply amount of polyester and the amount of pigment in the branch pipe are different (see Table 1), and the amount of cyan dye in the produced colored polyester is 4 wt%.

[0020] Example 3: The preparation process is the same as in Example 1, except that the polyester supply in the branch pipe and the amount of pigment are different (see Table 1), and the amount of cyan dye in the produced colored polyester is about 12wt%