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

Inactive Publication Date: 2019-02-12
NINGBO HUAXING SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the polymer melts on the market are mainly prepared through the following technical approaches. One is to use polyester fibers with different cross-sectional shapes or different properties, and to perform air-induced repeated and continuous network combinations or plying by extending the length of the filaments. Combination of processing methods to achieve, generally using conventional spinning and drawing, high-speed spinning or spinning and drawing a step-by-step process, the processing method has complex processing procedures, long process flow, low processing speed, high production cost, Many disadvantages such as low efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a polymer melt and a polymer-melt conveying technology. The polymer melt comprises 30%-50% of a low-melting-point polymer melt and 50%-70% of a second polymer melt, and the second polymer melt is a mixture of 55%-65% of terephthalic acid and 35%-45% of glycol. A preparing method of the low-melting-point polymer melt includes the following steps that diacid and dihydric alcohol are prepared into slurry; a low polymer of diacid dihydric alcohol ester is obtained through esterification; the low polymer and polyether are mixed to be even and subjected to an ester exchangereaction to obtain a homogenized substance; the homogenized substance and a chain extender are mixed, a polycondensation reaction is carried out, and the polymer melt is obtained. According to the polymer melt and the polymer-melt conveying technology, the low-melting-point polymer melt is added into a conventional polymerization melt, so that the drying process of low-melting-point polyester is omitted, the production cost is reduced, and meanwhile the stability of the product quality is guaranteed. The conveying method is simple and convenient, the obtained polymer melt has the high purity degree and the stable fiber quality, waste materials are not discharged, and the aims of clean production, saving energy and reducing emission are achieved.

Description

technical field [0001] The invention relates to a polymer melt and a delivery process for the polymer melt. Background technique [0002] At present, the polymer melts on the market are mainly prepared through the following several technical approaches. One is to use polyester fibers with different cross-sectional shapes or different properties, and perform air-induced repeated and continuous network combinations or plying by extending the length of the filaments. Combination of processing methods to achieve, generally using conventional spinning and drawing, high-speed spinning or spinning and drawing a step-by-step process, the processing method has complex processing procedures, long process flow, low processing speed, high production cost, Many shortcomings such as low efficiency. Contents of the invention [0003] The object of the present invention is to provide a polymer melt with stable quality in view of the above-mentioned problems in the prior art. [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D1/06D01D4/00D01D5/096D01F6/92
CPCD01D1/06D01D4/00D01D5/096D01D13/00D01F6/92
Inventor 熊乃胜
Owner NINGBO HUAXING SCI & TECH
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