Hirosi Ohhira

Title: Hirosi Ohhira: Innovator in Polyvinylidene Fluoride Filaments

Introduction

Hirosi Ohhira is a notable inventor based in Iwaki, Japan. He has made significant contributions to the field of materials science, particularly through his work on polyvinylidene fluoride filaments. His innovative approach has led to advancements in the properties and applications of this versatile material.

Latest Patents

Ohhira holds a patent for an improved polyvinylidene fluoride resin-made filament. This invention consists substantially of a blend of 99-wt. % of a first polyvinylidene fluoride resin component with an inherent viscosity higher than 1.30 dl/g, and 1-60 wt. % of a second polyvinylidene fluoride component with an inherent viscosity lower than 1.20 dl/g. The blend exhibits a critical shearing stress lower than 2.8 × 10 dyne/cm² and is subjected to melt-spinning, followed by primary and secondary stretching in a temperature range of 70°C to 180°C. The overall stretch factor is selected to be between 4 and 10.

Career Highlights

Ohhira is associated with Kureha Kagaku Kogyo Kabushiki Kaisha, where he has been instrumental in developing advanced materials. His work has not only contributed to the company's portfolio but has also enhanced the understanding of polyvinylidene fluoride applications in various industries.

Collaborations

Ohhira has collaborated with notable colleagues such as Hiroyuki Endo and Tohru Sasaki. These partnerships have fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Hirosi Ohhira's contributions to the field of polyvinylidene fluoride filaments exemplify the impact of innovative thinking in materials science. His patent and collaborative efforts continue to influence advancements in this area.