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К вопросу интенсификации процессов гигротермической обработки натуральных полимерных материалов легкой промышленности

К вопросу интенсификации процессов гигротермической обработки натуральных полимерных материалов легкой промышленности

Abstract

Methods of an intensification of processes of hydrothermal treatment for giving to materials of light industry of properties of molding capacity are offered. These operations are carried out before formation, the various ways one of which is the sorption way of moistening. The intensification of an external mass exchange at this way can be carried out at the expense of temperature increase, humidity and the speed of movement of damp air, application nozzle обдува, preliminary pumping out. At the expense of application of an oscillating mode, the mechanism of transfer of moisture in a material at the expense of application of vacuum the intensification of an internal mass exchange can be carried out So that to intensify a sorption way of moistening vacuum application, and as at the expense of increase in coefficient of the external diffusion, which influence on the speed of sorption of moisture approximately in 100 times more sizes of coefficient of internal diffusion is necessary. In a different way is the contact (thermal diffusion) way of moistening different from other ways way of movement of moisture under the influence of a temperature gradient at the expense of all three types of thermomoisture pro-water content. On the basis of the analysis the most effective, from existing ways of hydrothermal treatment for giving to shoe materials of properties of molding capacity from the point of view of an intensification of process and influence on physico-mechanical properties of skin, application of vacuum allows to change the mechanism of transfer of moisture in a material with diffusive on effusions which speed considerably surpasses the speed of the diffusive.

Предложены методы интенсификации процессов гигротермической обработки для придания материалам легкой промышленности свойств формуемости. Данные операции выполняются перед формованием, различными способами, одним из которых является сорбционный способ увлажнения. Интенсификация внешнего массообмена при данном способе может быть осуществлена за счёт повышения температуры, влажности и скорости движения влажного воздуха, применения соплового обдува, предварительного вакуумирования. За счёт применения осциллирующего режима, механизма переноса влаги внутри материала за счёт применения вакуума может быть осуществлена интенсификация внутреннего массообмена, Таким образом, чтобы интенсифицировать сорбционный способ увлажнения, необходимо применение вакуума, а также за счёт увеличения коэффициента внешней диффузии, влияние которого на скорость сорбции влаги примерно в 100 раз больше величины коэффициента внутренней диффузии. Другим способом является контактный (термодиффузионный) способ увлажнения, отличающийся от других способов способом движения влаги под действием температурного градиента за счёт всех трёх видов термовлагопроводности. На основе анализа наиболее эффективным из существующих способов гигротермической обработки для придания обувным материалам свойств формуемости, с точки зрения интенсификации процесса и влияния на физико-механические свойства кожи, применение вакуума позволяет изменить механизм переноса влаги внутри материала с диффузионного на эффузионный, скорость которого значительно превосходит скорость диффузионного.

Keywords

ВАКУУМ., ФОРМУЕМОСТЬ, ВЛАЖНО-ТЕПЛОВАЯ ФИКСАЦИЯ, УВЛАЖНЕНИЕ, ГИГРОТЕРМИЧЕСКАЯ ОБРАБОТКА, ИНТЕНСИФИКАЦИЯ, VACUUM.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold