Hitoshi Maeda

Title: Hitoshi Maeda: Innovator in Polyurethane Foam Technology

Introduction

Hitoshi Maeda is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of polyurethane foam technology, holding 2 patents that showcase his innovative methods in producing molded articles.

Latest Patents

Maeda's latest patents include a production method for polyurethane foam molded articles. This invention provides a method for producing a polyurethane foam molded article from a polyisocyanate compound, a polyol mixture containing polyol, a catalyst, a crosslinking agent, and a blowing agent. The method involves continuously injecting the polyisocyanate compound, the polyol mixture, and the blowing agent into a mold using a specialized molding machine. Notably, the timing of the injection of the blowing agent is delayed after the start of injecting the polyisocyanate compound and the polyol mixture. This innovative approach allows for the production of a polyurethane foam molded article with selectively formed skin or high-density portions, where the proportions can be varied freely.

Another patent by Maeda describes a method of producing a polyurethane molded article using a single molding machine that can provide distinctly polyisocyanate components and two kinds of polyol components. In this method, prior to completing the feed of a first polyurethane mixture liquid into a mold, a second polyurethane mixture liquid containing a blowing agent is fed into the mold. This technique also results in a polyurethane foam molded article with selectively formed portions, allowing for customizable density and structure.

Career Highlights

Hitoshi Maeda is currently associated with Bayer MaterialScience AG, where he continues to develop and refine his innovative techniques in polyurethane foam production. His work has significantly impacted the industry, leading to advancements in the manufacturing processes of molded articles.

Collaborations

Maeda has collaborated with notable colleagues, including Masafumi Nakamura and Masaru Suzuki. Their combined expertise has contributed to the successful development of innovative solutions in the field of polyurethane technology.

Conclusion

Hitoshi Maeda's contributions to polyurethane foam technology through his patents and career at Bayer MaterialScience AG highlight his role as a key innovator in the industry. His work continues to influence the production methods of molded articles, showcasing the importance of innovation in material science.