Polymer melt and polymer-melt conveying technology
A technology of melt and process, which is applied in the field of polymer melt and the conveying process of the polymer melt, can solve the problems of complex processing procedures, low processing speed, high production cost, etc., and achieve the reduction of production cost, guarantee of stability, and simple method Effect
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Embodiment 1
[0020] Dibasic acid and diol are formulated into slurry at a mass ratio of 1:1.2; the slurry is esterified to obtain dibasic acid glycol ester oligomers; oligomers and polyether are mixed at a mass ratio of 2:1 Uniformly carry out transesterification reaction to obtain a homogenate; the homogenate is mixed with a chain extender to obtain a low melting point polyester melt through polycondensation reaction. Get the above-mentioned low-melting point polyester melt that mass fraction is 40% and mass fraction is 60% polymerization melt two (polymerization melt two is the terephthalic acid that mass fraction is 60% and the ethylene glycol that mass fraction is 40% The mixture) is transported through the delivery pump to the spinning box with a temperature of 272°C through the melt filter, the melt booster pump, the melt cooler, the melt distribution valve, and the melt distribution pipe in turn, and after spinning The metering pump with a specification of 2.0ml / r in the box, the sp...
Embodiment 2
[0022] Dibasic acid and diol are formulated into slurry at a mass ratio of 1:1.5; the slurry is esterified to obtain oligomers of dibasic acid glycol ester; the oligomer and polyether are mixed at a mass ratio of 1:1 Uniformly carry out transesterification reaction to obtain a homogenate; the homogenate is mixed with a chain extender to obtain a low melting point polyester melt through polycondensation reaction. Getting mass fraction is that the above-mentioned low-melting point polyester melt of 50% and mass fraction are 50% polymerization melt two (polymerization melt two is the terephthalic acid that mass fraction is 65% and the ethylene glycol that mass fraction is 35% The mixture) is transported through the transfer pump, sequentially through the melt filter, melt booster pump, melt cooler, melt distribution valve, and melt distribution pipe to the spinning box with a temperature of 270 ° C, and after spinning The metering pump with a specification of 2.4ml / r in the box, ...
Embodiment 3
[0024] Dibasic acid and diol are formulated into slurry at a mass ratio of 1:0.8; the slurry is esterified to obtain dibasic acid glycol ester oligomers; oligomers and polyether are mixed at a mass ratio of 3:1 Uniformly carry out transesterification reaction to obtain a homogenate; the homogenate is mixed with a chain extender to obtain a low melting point polyester melt through polycondensation reaction. Getting mass fraction is that the above-mentioned low-melting point polyester melt of 30% and mass fraction are 70% polymerization melt two (polymerization melt two is the terephthalic acid that mass fraction is 55% and the ethylene glycol that mass fraction is 45% The mixture), through the transfer pump, sequentially through the melt filter, melt booster pump, melt cooler, melt distribution valve, melt distribution pipe to the spinning box with a temperature of 275 ° C, after spinning The metering pump with a specification of 1.6ml / r in the box, the spinning assembly and th...
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