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Open AccessArticle

Blowing Properties and Functionality of Thermoplastic Polyester Film Using Thermally Expandable Microcapsules

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Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Korea
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Department of Clothing and Textiles, Pusan National University, Busan 46241, Korea
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(10), 1652; https://doi.org/10.3390/polym11101652
Received: 8 September 2019 / Revised: 8 October 2019 / Accepted: 9 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Innovative Functional Textiles)
Blowing film was prepared using a polyester elastomer with thermally expandable microcapsules to investigate its blowing properties and functionality. Film with 11% microcapsule contents showed the lowest specific gravity and the highest blowing efficiency. However, the collapse and merging of blowing cells with 11% microcapsule contents was found by SEM. Therefore, film with 9% microcapsule contents was shown to have better blowing and cell stability than that of film with 11% microcapsule contents. Tensile strength and elongation decreased by increasing microcapsule contents. Film curl and film shrinkage properties were unaffected by microcapsule contents. Water vapor permeability and hydrostatic pressure was decreased by increasing microcapsule contents. View Full-Text
Keywords: thermally expandable microcapsule; blowing agent; polyester film; mechanical properties; shrinkage; curl; permeability thermally expandable microcapsule; blowing agent; polyester film; mechanical properties; shrinkage; curl; permeability
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MDPI and ACS Style

Pak, A.R.; Park, J.H.; Lee, S.G. Blowing Properties and Functionality of Thermoplastic Polyester Film Using Thermally Expandable Microcapsules. Polymers 2019, 11, 1652.

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