- 著者
- 竹下 英之 榎本 和城
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 年次大会 2011 (ISSN:24242667)
- 巻号頁・発行日
- pp._G040021-1-_G040021-3, 2011-09-11 (Released:2017-06-19)
Recently, from the viewpoint that decreases the load to the global environment, the bio-plastics, which are derived from the reusable resources from the biomass, attract much attention as new polymeric materials instead of the polymers derived from exhaustible resources such as petroleum. Poly lactic acid (PLA) is considered to be one of the most promising bio-plastics because its strength and modulus are as high as that of the existing plastic, and it has also biodegradability. In this study, we investigated the effect of immersion in gasoline on mechanical properties of injection-molded PLA plates in the case of assuming that PLA will be applied to severe environment such as in contact with gasoline.
- 著者
- 土井 幸輝 豊田 航 田中 隆
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 年次大会 2011 (ISSN:24242667)
- 巻号頁・発行日
- pp._S153012-1-_S153012-4, 2011-09-11 (Released:2017-06-19)
Children with visual impairment and teachers of school for the children request new Raised-Line Drawing Kit for practical use in the field of education, because the existing drawing kit do not have sufficient performance to satisfy their various needs. In this paper, we reported that the development of the test model of our Tactile Drawing Pen using beeswax enable people with visual impairment to express and perceive their ideas more accurately. Additionally, we conducted two experiments for collecting the quantitative data to decide the basic specification guaranteeing the high usability for all age people with visual impairment including the children. The results showed that people with visual impairment felt that our device was easy to write when the pen pressure needed to release the inks was lower, and when the radius on the tip was larger. We determine that the recommended values are 50 gram-force. Furthermore, we determined that our Tactile Drawing Pen should equip mechanism to release inks which sizes are 2.0 mm height and 3.0 mm line width because the dimensions are appropriate to understand easily.