A Polyester Spinning Method for Reducing Extrusion Swelling Ratio
A technology of extrusion expansion and polyester spinning, applied in the field of polyester fiber, can solve the problems of poor product shape retention, excessive extrusion expansion ratio, lower extrusion expansion ratio, etc., and achieve good shape retention. effect, reducing outlet expansion, reducing the effect of extrusion expansion ratio
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Embodiment 1
[0053] A polyester spinning method for reducing the extrusion swell ratio, comprising the steps of metering and extruding the spinning melt; firstly preparing the spinning melt, and preparing a slurry of terephthalic acid and ethylene glycol monomers , wherein the molar ratio of terephthalic acid and ethylene glycol is 1:1.2, then add catalyst, stabilizer and saturated fatty acid metal salt and mix evenly, carry out esterification reaction, esterification reaction pressurized reaction in nitrogen atmosphere, add The pressure is normal pressure, and the temperature of the esterification reaction is 250°C. When the amount of water distilled out in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction; Start the polycondensation reaction in the low vacuum stage under the condition of low vacuum. In this stage, the pressure is steadily pumped from normal pressure to below the absolute pressure of 500Pa, the te...
Embodiment 2
[0059] A polyester spinning method for reducing the extrusion swell ratio, comprising the steps of metering and extruding the spinning melt; firstly preparing the spinning melt, and preparing a slurry of terephthalic acid and ethylene glycol monomers , wherein the molar ratio of terephthalic acid and ethylene glycol is 1:2.0, then add catalyst, stabilizer and saturated fatty acid metal salt and mix evenly, carry out esterification reaction, esterification reaction pressurized reaction in nitrogen atmosphere, add The pressure is 0.3MPa, and the temperature of the esterification reaction is 260°C. When the amount of water distilled in the esterification reaction reaches more than 90% of the theoretical value, it is the end of the esterification reaction; Start the polycondensation reaction in the low vacuum stage under the condition of low vacuum. In this stage, the pressure is steadily pumped from normal pressure to below the absolute pressure of 500Pa, the temperature is contro...
Embodiment 3
[0064] A polyester spinning method for reducing the extrusion swell ratio, comprising the steps of metering and extruding the spinning melt; firstly preparing the spinning melt, and preparing a slurry of terephthalic acid and ethylene glycol monomers , wherein the molar ratio of terephthalic acid and ethylene glycol is 1:1.6, then add catalyst, stabilizer and saturated fatty acid metal salt and mix uniformly, carry out esterification reaction, esterification reaction pressurized reaction in nitrogen atmosphere, add The pressure is 0.2MPa, the temperature of the esterification reaction is 255°C, when the amount of water distilled in the esterification reaction reaches more than 90% of the theoretical value, it is the end of the esterification reaction; Start the polycondensation reaction in the low vacuum stage under the condition of low vacuum. In this stage, the pressure is steadily pumped from normal pressure to below the absolute pressure of 500Pa, the temperature is control...
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