Hiroki Shimizu

Title: The Innovations of Hiroki Shimizu: A Pioneer in Polypropylene Film Capacitors

Introduction

Hiroki Shimizu is an accomplished inventor based in Ichihara, Japan, known for his significant contributions to the field of materials science, particularly in the development of polypropylene for film capacitors. With a patent to his name, Shimizu's inventions have implications for various applications in electronics.

Latest Patents

Shimizu's noteworthy patent involves the creation of polypropylene (F) specifically designed for film capacitors. This innovation includes biaxially stretched film for film capacitors and outlines a process for producing the same. The patent sets forth several technical specifications:

1. An MFR (JIS K 7210, 230°C, 2.16 kg load) in the range of 1-10 g/10 min.

2. An mmmm fraction of at least 93%.

3. A <2,1>erythro position defect amount measured using C-NMR that is less than 0.1 mol %.

4. Ash content, determined by complete combustion, that is at most 50 ppm.

5. Chlorine content, assayed via ion chromatography, that is limited to 5 ppm.

6. The inclusion of a propylene homopolymer featuring an Mw/Mn as measured via GPC in the range of 6.5-12 and an α-crystal nucleating agent with a melting point of at most 290°C.

Career Highlights

Hiroki Shimizu is employed at Prime Polymer Co., Ltd., where he has made noteworthy contributions to the field of polymer science. His remarkable patent showcases his expertise and innovative thinking, positioning him as a valuable asset to the company and the industry as a whole.

Collaborations

Throughout his career, Shimizu has collaborated with esteemed colleagues such as Satoshi Tamura and Jun Birukawa. These partnerships have likely enhanced the development of his inventions and enriched the innovative environment at Prime Polymer Co., Ltd.

Conclusion

Hiroki Shimizu stands out as a significant inventor in the field of polypropylene film capacitors. His patent accomplishments reflect his dedication to advancing material science and showcases the importance of collaboration in achieving breakthrough innovations. As he continues his work at Prime Polymer Co., Ltd., the industry eagerly anticipates further advancements from this talented inventor.