本研究旨在探討發泡劑不同、VA%高低、TPE之混摻以及不同加工工藝對EVA發泡之物性影響。發泡劑選用無機發泡母粒EE405F、有機發泡母粒7300以及有機發泡劑AC3000F；EVA選了VA26%與18%；TPE選用直鏈段的POE與本身即有部分物理交聯的SEBS進行物性之改良。使用微型混鍊機進行配方之混練，然後分別進行一次發泡、二段發泡和將配方投入押出機進行複合膜發泡。研究中採用TGA、DSC進行基材之熱性質分析，決定加工之溫度；利用微型混練機紀錄不同溫度膠料之黏度；使用SEM觀測發泡之孔洞型態；使用無轉子發泡流變儀分析發泡氣體壓力以及膠料交聯程度；對發泡後之樣品測試排水密度、抗拉強度、撕裂強度、壓縮永久變形、DMA等性質。
結果發現發泡劑對於EVA發泡物性的影響，使用無機發泡劑可以有較優良之物性；VA%對物性之影響不明顯；TPE混入EVA發泡可提升整體物性，尤以SEBS添加效果更佳；不同的發泡工藝對於發泡材之物性影響不大，但可以用來調控發泡材之物性。

The purpose of this study was to investigate the effects of different foaming agents, VA contents, TPE blending, and different processing methods on the physical properties of EVA foaming. We use foaming agent as follow: inorganic foam masterbatch-EE405F, organic foam masterbatch-7300, and organic foaming agent-AC3000F. We choose VA contents 18% and 26% of EVA. To Improve physical properties, we use two kinds of TPE. One is POE, which has straight chemical chain. And the other is SEBS, which has partially physically cross-linked. We use micro compounder to blend the sample, then put into molded foaming, two-stage foaming, or the extruder for foaming of three-layer film.
To determine the temperature of processing and thermal properties analysis of substrates, we use TGA and DSC in the study. Record the viscosity at different temperatures when using the micro compounder. Use SEM to observe the shape of the cell. Use moving die (foam pressure) rheometer to analyze the pressure of foaming and the degree of crosslinking. Test the characteristics of density, tensile strength, tear strength, compression set, DMA, etc. after foaming.
As a result, it was found that the effect of the foaming agent on the foaming properties of EVA can be improved by using an inorganic foaming agent. VA% doesn’t have obvious effect on physical properties. TPE blended with EVA foam can improve physical properties, especially with SEBS. Different foaming processes have little effect on the physical properties of EVA foam, but it can be used to control the physical properties of foamed materials.

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