Location History:
- Atsugi, JA (1976)
- Sagamihara, JA (1976)
- Atsugi, JP (1993 - 2001)
Company Filing History:
8 out of 1,588 
1 out of 832,891 Years Active: 1976-2001
Title: Sakae Shimotsuma - Pioneering Innovations in Resin Compositions
Introduction
Sakae Shimotsuma, an accomplished inventor based in Atsugi, Japan, holds an impressive portfolio of 9 patents. His contributions primarily focus on advanced resin compositions and molded articles that exhibit high mechanical strength and environmentally friendly characteristics.
Latest Patents
Among his latest innovations, Shimotsuma has developed a resin composition combining polylactic acid and aliphatic polyester carbonate. This invention provides a material with adequate heat-resistance, moldability, and solvent resistance. Specifically, the Vicat softening point is established at 60°C or higher, with tensile modulus of elasticity exceeding 0.9 GPa and modulus in flexure exceeding 0.6 GPa. Additionally, this composition supports biodegradable injection-molded articles designed for robust applications, such as helmet headgear material, enhancing mechanical properties while ensuring superior disposal qualities.
Another notable patent includes a resin molded article featuring a movable projecting portion tailored for keyboard applications. This design significantly reduces flex fatigue and is created from a polyether ester block copolymer, paired with an alkali metal salt of an aliphatic carboxylic acid. This innovation ensures durability with a flexible thin side portion that retains at least 85% flexibility.
Career Highlights
Sakae Shimotsuma's career began at Teijin Limited, where he honed his skills and contributed to innovations in the Polymer Science sector. His expertise has enabled him to be at the forefront of developing high-performance materials suitable for various industrial applications.
Collaborations
Throughout his career, Shimotsuma has collaborated with esteemed professionals, including Masahiro Hosoi and Takatoshi Kuratsuji. These collaborations have furthered his research and enhanced the development of innovative products.
Conclusion
Sakae Shimotsuma exemplifies a dedicated inventor whose work significantly impacts the field of resin compositions. His patents not only advance technological capabilities but also promote sustainable practices in product design, making him a crucial figure in contemporary innovation in Japan.