Methodology
Process Design
The process design was based on the process specifications and final product (i.e., textile fiber) and they include: the operation temperature: 270-320 oC, the drying temperature: 70-140 oC, the maximum PET humidity percentage: 0.02 %, the fiber tenacity: 2 gf/denier, the elongation: 20 %, the residual retraction: < 5 %, and the product denier: 1.5-3. For the screw design, the properties of the raw material and the design parameters (e.g., compression ratio, residence time, angles of the helix, the relationship length/diameter of the extruder) were considered and they values were established according to the literature [11,25].
MethodologyProcess DesignThe process design was based on the process specifications and final product (i.e., textile fiber) and they include: the operation temperature: 270-320 oC, the drying temperature: 70-140 oC, the maximum PET humidity percentage: 0.02 %, the fiber tenacity: 2 gf/denier, the elongation: 20 %, the residual retraction: < 5 %, and the product denier: 1.5-3. For the screw design, the properties of the raw material and the design parameters (e.g., compression ratio, residence time, angles of the helix, the relationship length/diameter of the extruder) were considered and they values were established according to the literature [11,25].
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