Liquid Isothermal Bath LIB

The liquid isothermal bath (LIB) was first applied in producing PET fibers by NCSU researchers in early 1990s. The initial motivation was quite straightforward, i.e., to produce high tenacity/ high modulus fibers via a one-step high-speed spinning process. 

Figure 9.24 Schematic of traditional melt spin-draw process and liquid isothermal bath (LIB) process.

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