著者

位地 正年

出版者

一般社団法人 日本ゴム協会

雑誌

日本ゴム協会誌 (ISSN:0029022X)

巻号頁・発行日

vol.81, no.5, pp.181-187, 2008-05-15 (Released:2010-03-25)

参考文献数

22

被引用文献数

2 2

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We have developed highly functional bioplastics: polylactic acid (PLA) composites to be used in electronic products. While fully preserving its environment-friendly properties (high biomass-based component ratio and safety), we have improved PLA's practicability, and also added values to it by endowing it with desirable new properties. A heat resistant PLA compound containing the fiber of Kenaf and other safe additives mainly made with biomass has been developed (the biomass content in the resin part: 90%). The PLA composite began to be used in the housings of a cellular phone. Having also successfully achieved a flame-retardant PLA composite with a safe metal hydroxide as a heat absorbance and a phenol type charring agent, we now plan to expand its use for personal computer housings, etc. in near future. Furthermore, we have developed new functional PLA composites to create new applications of bioplastics. A PLA composite that combines shape memory and recyclability has been performed by thermo-reversibly cross-linking PLA. The composite has opened up possibilities for wearable electronic equipments. Also, a highly heat-conductive PLA composite with a cross-linked carbon fiber can solve heat-release issues caused with the latest mobile electronic equipments with thin thickness. The composite has realized heat diffusion higher than that of stainless steel.

著者

木内 幸浩 位地 正年 鈴木 博之 大須賀 浩規

出版者

公益社団法人 高分子学会

雑誌

高分子 (ISSN:04541138)

巻号頁・発行日

vol.54, no.3, pp.117-119, 2005-03-01 (Released:2011-10-14)

参考文献数

7

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環境負荷の大きいハロゲン系などの難燃剤を一切添加せずに,自己消火機能をもつ難燃性エポキシ樹脂組成物を開発し,ICモールド材やプリント基板用絶縁材に適用した。この自己消火性エポキシ樹脂組成物は主として,ノボラック構造中に芳香族化合物をもつフェノールアラルキル型のエポキシ樹脂と硬化剤からなり,着火時に樹脂表面が発泡することで高度な難燃性を実現している。