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The Application of Heat Transfer Compounds in Spandex Spinning Chimney

HTT heat transfer compound has successfully support spandex production

The spandex production process involves various physical changes and chemical reactions. Not just including heat transfer process, but also has material transfer process. Dry-spinning technology is commonly used by domestic companies today, with spinning speed around 400-900M/min. To reduce production cost, boost productivity, increase spinning speed and improve the quality of spandex products, are the key challenges we are facing today.

Today, the size of spinning chimney used by domestic companies is small. Its side air flow rectifier and sparger are bulky with poorly designed structure. These systems apply steam tracing or electrical tracing solutions. The amount of temperature raised by hot air flow is very limited. The insufficient and unevenly heat tracing can only support the spinning speed less than 500M/min. All these have very negative impact on the quality of spinning. And if we recklessly increase the spinning speed, the density of DMAc in chimney will be raised to a explosion threshold.

It is in the spinning chimney that the spandex fiber formed and solvent volatilized and recovered. The stability and evenness of temperature have significant impact to the DMAs’ volatilization and have decisive effect on many quality index of spandex fiber.

Published by the government regulation in 2015, GB/T 51109-2015, “The Standard of Spandex engineering device Installation and quality acceptance inspection” already stated that any rectangle spinning chimney should use heat tracing system with heat transfer compounds between tracing pipe and spinning chimney. You have to make sure the heat transfer compounds are fully dried before the installation of insulation.

HTT heat transfer compounds replace radiant and convective heat transfer with direct contact heat transfer to make heat transfer more evenly and effectively. By doing so, we can stabilizing the temperature of spinning chimney, improve spandex product quality, reduce energy consumption and ensure a sustainable production of high quality spandex.