直纺大有光涤纶熔体输送过程的模拟分析

通过对熔体直纺大有光涤纶熔体输送过程的分析,建立了输送过程各管段中压力降、温升、特性粘数降以及停留时间等参数的数学模型,分析了各管段中参数的变化,得到了这些参数的权重分析式。结果表明:采用较低的初始熔体特性粘数(IV0),较低的初始熔体温度(T0),较高的初始压力(P0),增加生产能力对粘度降下降有利;而温升主要受IV0、T0及气相联苯温度(Tsb)的影响,较高T0及较低Tsb导致熔体温度下降更快;随着熔体输送能力增加,熔体在管道内的停留时间呈一阶递减指数形式下降,其他输送条件对其影响很小。

Simulation analysis of melt transfer process for directly spinning bright PET fiber

Based on the analysis of the melt transfer process for directly melt spinning bright PET fiber,the mathematical models of different pipeline sections were established to simulate the parameters such as pressure drop,temperature elevation,intrinsic viscosity drop,resident time.The changes of these parameters were analyzed,thus the weight analysis equations were obtained.The results showed that the viscosity drop can be moderated at relatively low initial intrinsic viscosity(IV0) and initial melt temperature(T0),relatively high initial pressure(P0) and enlarged production capacity.The temperature elevation was dominantly affected by IV0,T0 and gas-phase biphenyl temperature(Tsb).The melt temperature was decreased much faster at relatively high T0 and low Tsb.The resident time was decreased by the first order exponential attenuation function as the melt transfer capacity was enlarged.The other transfer conditions had little effect on the resident time.