エポキシ樹脂硬化物の薄膜試験片に対して3種類の水分拡散係数測定を実施して測定値および測定時間を比較した。JIS K7209 に従う手作業の測定では100日以上の長時間を要したが，水分吸脱着測定装置を用いると測定時間が15日，差圧式水蒸気透過度測定装置では2.1日であったことから，自動測定装置を用いることで大幅な時間短縮が行えた。また，水分吸脱着測定装置では手作業の結果とおおむね一致した水分拡散係数および飽和吸水率が得られた。他方，差圧式水蒸気透過度測定装置では水分拡散係数はおおむね一致したが，溶解拡散機構から求めた飽和吸水率は手作業の結果と異なっていた。

Tackifiers are widely used in adhesives and play an important role in improving / balancing adhesive properties such as tack, peel strength, and shear resistance. In recent years, in the field of adhesives, there has been a strong demand for reduction of solvent usage from the perspective of SDGs such as environmental issues and occupational health safety problems, and the replacement of solvent-type products with emulsion-type products is being actively promoted. In response to this trend, emulsion-type tackifiers have been developed for supporting the design of emulsion-type PSA and adhesives. This paper introduces the recent development trends of emulsion-type tackifiers, including low-VOC type which can meet stricter environmental regulations and water-resistance type which can solve the longstanding problem of emulsiontype tackifiers in terms of peel strength drop under high moisture and temperature conditions.

The five senses are essential for humans. The author had the opportunity to write a review article entitled“Interface functions of the five senses” in this journal’s special issue, Journal of Adhesion Society, Japan, Vol. 59, pp. 132-140（ 2023）， and introduced the functions of the five senses as an interface between humans and the outside world, the historical background of the development of related science and technology, and recent topics related to brain science. In this review, the author revisits the topic of kansei and explains the interface functions of the five senses from a different angle than in the previous part, based on a technical and engineering perspective. How can we specifically evaluate the five senses? How can we quantify them? What form can we use to generalize the results? Are there any groundbreaking new methods for utilizing sensitivity in manufacturing? In order to answer these questions, the author first explains how kansei has been involved in modern science and technology over time, and then introduces the general evaluation methods of kansei that have been used in the past. Finally, recent topics and future technological trends is discussed.