Nobuhisa Ota

Title: Nobuhisa Ota: Inventor of Propylene Resin Expansion Technologies.

Introduction

Nobuhisa Ota is an inventor associated with Settsu, Japan, and Kaneka Corporation. His patent work includes methods for producing pre-expanded propylene resin particles designed to achieve high expansion and strong adhesion during molding. His listed portfolio includes 2 patents.

Latest Patents

Ota’s listed patents focus on pre-expanded particles made from propylene resin and processes for preparing them. The inventions describe a resin composition containing an ethylene-propylene random copolymer and an alkali metal salt of an ethylene and (meth)acrylic acid copolymer.

The process disperses resin particles in an aqueous medium inside a pressure vessel, heats the mixture above the particles’ softening temperature, and introduces an inorganic gas. The mixture is then released into a lower-pressure environment after being held near the expansion temperature for at least 30 minutes. The stated aim is to produce particles with a high expansion ratio and good molding adhesion without relying on a volatile blowing agent or increasing expansion pressure.

Career Highlights

Ota’s patent record reflects work on polymer materials and manufacturing processes, particularly the preparation of expanded propylene resin particles. The listed inventions address both material composition and process conditions.

Collaborations

The patent information names Tsuyoshi Mihayashi and Yutaka Yanagihara as Ota’s coworkers. The inventions are associated with Kaneka Corporation.

Conclusion

Nobuhisa Ota’s listed patents concern propylene resin particle expansion, combining a specified polymer composition with controlled heating and pressure-release conditions to support efficient production and effective molding adhesion.