| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 104 === In this research, the composition, processing parameters, and the ability of lamination in TPU/EVA blends system co-extrusion hot melt adhesive films were investigated, which were used to produce high-efficiency environmental-friendly sewing free and solvent free lamination film for textile.
In the experiment, hot melt adhesive type thermoplastic polyurethane elastomer(TPUHM) and ethylene-vinyl acetate(EVA) were analyzed by melt flow index tester(MFI), thermogravimetric analysis(TGA), differential scanning calorimetry(DSC), and cone/plate rheometer to determine the best processing parameters for blending. Then, raw materials were blended into certain composing by using twin screw extrusion mixer. Due to the high shear stress of the mixer, melted polymers were completely mixed and extruded into plastic particles. Analyzed by TGA, DSC, and cone/plate rheometer, the plastic particles were defined. The parameters of film process were concluded through the reference analysis above. The hot melt adhesive films were manufactured by tri-axial co-extruder. Getting the hot melt single-layer adhesive film and the double-layers film consisting of TPU base-layer and hot melt single-layer film, the plastic particles were extruded in the t-die which structure was designed for co-extrusion.
As the hot melt adhesive films were analyzed through the tests of mechanical properties, peeling properties of lamination, resistance to water, and elasticity recovery, the best composition of the adhesive films and the processing parameters were concluded. Then, we added Aceox® TBEHC as a cross-linking agent to the best adhesive film in order to strengthen the resistance to water and the peeling properties of lamination. The EVA masterbatches containing cross-linking agent were blended with TPUHM in the best composing and extruded into un-crosslinked films by tri-axial co-extruder. After finishing cross-linking reaction with automatic hot-forming machine, the films were analyzed by the tests above and compared with the un-crosslinked ones. In the end, the more competitive hot melt adhesive lamination film for textile was generalized.
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