Location History:
- Tanashi, JP (1982)
- Tokyo, JP (1984 - 1992)
Company Filing History:
5 out of 5 
4 out of 7 
2 out of 2 Years Active: 1982-1992
Title: Sadao Kumasaka: Innovator in Polyurethane Foam Technology
Introduction
Sadao Kumasaka is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of polyurethane foam technology, holding a total of 13 patents. His innovative methods and apparatus have advanced the manufacturing processes of polyurethane foams, making them more efficient and effective.
Latest Patents
One of Kumasaka's latest patents is a method of manufacturing polyurethane foam. This method involves mixing a polyol and an organic isocyanate without causing them to react, creating a nonreacted mixture. This mixture is then combined with a foaming agent, a catalyst, a foam stabilizer, and other necessary additives. The resultant mixture is injected into a mold, allowing it to foam and crosslink. Additionally, the polyol and organic isocyanate can be preliminarily mixed with an inert gas or air. Another notable patent is an apparatus for producing polyurethane foam slabs, which allows a urethane foam stock solution to expand in a reduced pressure environment. This innovation ensures the flatness of the foam's top by utilizing a lifting jig or rotating the tank.
Career Highlights
Throughout his career, Sadao Kumasaka has worked with notable companies such as Human Industry Corporation and Toyo Rubber Chemical Industrial Corporation. His work in these organizations has allowed him to develop and refine his innovative techniques in polyurethane foam production.
Collaborations
Kumasaka has collaborated with several professionals in his field, including Satomi Tada and Koretoshi Katsuki. These collaborations have contributed to the advancement of his research and the successful implementation of his patented technologies.
Conclusion
Sadao Kumasaka's contributions to polyurethane foam technology have established him as a key figure in the industry. His innovative methods and apparatus continue to influence the manufacturing processes of polyurethane foams, showcasing his dedication to advancing this field.