Company Filing History:
Years Active: 2001
Title: Toyozo Hamada: Innovator in Porous Membrane Technology
Introduction
Toyozo Hamada is a notable inventor based in Himeji, Japan. He has made significant contributions to the field of polymer technology, particularly in the development of porous membranes. His innovative work has led to advancements that enhance the functionality and efficiency of various applications.
Latest Patents
Hamada holds a patent for "Porous films, process for producing the same, and laminate films and recording sheets made with the use of the porous films." This patent describes a method for obtaining porous membranes that exhibit a micro phase separation structure. These membranes demonstrate a light transmittance of not less than 30% at a wavelength of 400 nm. The process involves the dry phase conversion method, which includes drying a coating layer of a dope containing a polymer, a good solvent, and a poor solvent. The polymers used in this invention include cellulose derivatives and various vinyl-series polymers. The resulting porous polymer membranes have a porosity of 10 to 60%, a mean pore size of about 0.002 to 0.35 µm, and a maximum pore size of not greater than 0.4 µm. These membranes are recognized for their excellent transparency and high productivity.
Career Highlights
Hamada is associated with Daicel Chemical Industries, Ltd., where he has been able to apply his expertise in polymer science. His work has not only contributed to the company's portfolio but has also positioned him as a key figure in the innovation of porous materials.
Collaborations
Throughout his career, Hamada has collaborated with notable colleagues such as Shuji Nakatsuka and Kiyoharu Mizumoto. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and advancements in technology.
Conclusion
Toyozo Hamada's contributions to the field of porous membrane technology exemplify the impact of innovative thinking in material science. His patent and work at Daicel Chemical Industries, Ltd. highlight the importance of advancements in polymer technology. His achievements continue to influence the industry and inspire future innovations.