Location History:
- Hiroshima, JP (1994)
- Otake, JP (1993 - 1996)
Company Filing History:
Years Active: 1993-1996
Title: Innovations of Takayuki Hirai
Introduction
Takayuki Hirai is a notable inventor based in Otake, Japan. He has made significant contributions to the field of materials science, particularly in the development of specialized membranes. With a total of 3 patents to his name, Hirai continues to push the boundaries of innovation.
Latest Patents
Hirai's latest patents include the development of a porous polypropylene hollow fiber membrane of large pore diameter. This innovative membrane features rectangular pores formed by microfibrils oriented in the lengthwise direction of the fibers. The joint portions consist of stacked lamellae, allowing the pores to be contiguous from the inner wall surface to the outer wall surface of the hollow fiber membrane, forming a stacked, multicellular structure. The average pore diameter ranges from 1.7 µm to 10 µm, with a porosity of 80 to 95% and an air permeability of not less than 4×10^5 l/m².hr.0.5 atm. This hollow fiber membrane can be produced by melt-spinning polypropylene, followed by annealing and specific stretching processes.
Career Highlights
Hirai is currently associated with Mitsubishi Rayon Company, Limited, where he applies his expertise in membrane technology. His work has been instrumental in advancing the capabilities of hollow fiber membranes, which have various applications in filtration and separation processes.
Collaborations
Hirai collaborates with esteemed colleagues such as Jun Kamo and Hiroshi Takahashi. Their combined efforts contribute to the innovative projects at Mitsubishi Rayon Company, Limited.
Conclusion
Takayuki Hirai's contributions to the field of membrane technology exemplify the spirit of innovation. His patents reflect a commitment to advancing materials science and improving industrial applications.