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http://dx.doi.org/10.5764/TCF.2019.31.3.187

Optimal Process Condition and Blowing of Thermoplastic Polyester Film using Thermally Expandable Microcapsule  

Bak, A Ram (Department of Organic Material Science and Engineering, Pusan National University)
Park, Jung Hyun (Department of Clothing and Textiles, Pusan National University)
Lee, Seung Geol (Department of Organic Material Science and Engineering, Pusan National University)
Publication Information
Textile Coloration and Finishing / v.31, no.3, 2019 , pp. 187-194 More about this Journal
Abstract
Blowing film was prepared using polyester elastomer with thermally expandable microcapsule to investigate the optimum blowing properties and the film making process. Physical properties including specific gravity, blowing efficiency, foaming shape, tensile strength and elongation of polyester film were tested by varying the process condition of temperature and revolution per minutes of the extruder. The lowest specific gravity of 0.709 can be achieved with excellent foaming cells at $210^{\circ}C$ and 50 RPM conditions. The highest tensile strength and elongation was shown at $210^{\circ}C$, 100 RPM and $230^{\circ}C$, 25 RPM conditions. However, most of the prepared polyester films showed over $1kg_f/mm^2$ of tensile strength which is reasonable value to use in film applications.
Keywords
thermally expandable microcapsule; blowing agent; polyester film; chemical blowing agent; optimal process condition;
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