Staple spinning line

FIGURE 1.9 Schematic diagram of staple spinning line. 

Drawing of a Hills bicomponent staple spinning line. 

Melt or solution spinning of synthetic fibers is a marvel of modern technology. Fiber lubrication, which is of the utmost importance in this high-speed process, is achieved by the application of spin finish—a combination of oils and surfactants. A typical spin line for the production of polyester staple fiber is shown schematically in Figure 2. The number of filaments, which can vary from tens to thousands, come into contact with various parts of the machinery, some of which are heated for proper fiber modification. To replenish the lost finish and to ensure adequate lubrication,... 

Figure 2. Schematic of a typical spin line for the production of staple fibers.

Increase of efficiency through the prevalence of medium capacity spinning lines and reduction of energy costs by the introduction of continuous processes into the field of staple fiber manufacture. 

Beijing Chonglee Machinery Engineering Co., Ltd. (2011). Staple and filament spinning lines. (Online) Available at www.ctamp.com.cn. 

Filtration can be applied in all stages of the process in a central filter in the polymer melt line, or at the end of the line, in the spinning assembly. Central filters are common in large-scale melt-spinning processes, for example, staple fiber production. Two parallel filters may be used to enable filter deaning without interruption... 

Polyester (or other fibers such as nylon or polypropylene) staple fibers can be produced by either a one-step process or a two-step process. The process steps are the same in both cases however, the fiber spinning speed is lower in a one-step process and the fiber is drawn, crimped and heat-set in one continuous machine. These one-step lines generally have smaller capacities and are often fed by extruders. They are mostly used for specialty fibers, such as bicomponents and non-apparel end uses and nonwovens. 

Like the cutting of the filament cables within the processing line, the cut converter as well as the tear converter produce a band of single staple fibers as feed material for the next processing steps in the secondary spin processing. In the tear converter, the cables are drawn stepwise to ensure the cohesion of the rope (Fig. 2.62). 

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