Katsuhiko Sumida is a notable inventor based in Amagasaki, Japan. He has made significant contributions to the field of materials science, particularly in the development of resin compositions and tearable films. With a total of 8 patents to his name, Sumida's work has had a considerable impact on various industries.

Latest Patents

One of his latest patents is a resin composition for white marking. This innovative resin composition comprises a thermoplastic resin, a non-terpene-series higher fatty acid or a derivative thereof, and a black pigment. The higher fatty acid can be a saturated higher fatty acid with about 12 to 30 carbon atoms or a metal salt thereof. The thermoplastic resin may include an acrylic resin and a styrenic resin. The black dye or pigment used can be carbon black, and the composition may also contain a dye or pigment such as titanium oxide. A clearly defined white marking is developed on this resin composition through laser irradiation.

Another significant patent is for easy tearable films and the method of producing them. This tearable film consists of a resin blend that includes a first polymer, which is a styrenic polymer, and a second polymer selected from the group consisting of a polyester and a polyamide. Alternatively, the film can be made with a first polymer that is a polyester and a second polymer selected from polycarbonate, acrylic polymer, or polyamide. The film features a continuous phase and a dispersed phase, forming an islands-sea structure, where the continuous phase constitutes 35-98 wt % and the dispersed phase constitutes 2-65 wt % of the film.

Career Highlights

Katsuhiko Sumida is currently employed at Daicel Chemical Industries, Ltd., where he continues to innovate and develop new materials. His work has been instrumental in advancing the capabilities of resin compositions and films, making them more efficient and effective for various applications.

Collaborations

Throughout his career, Sumida has collaborated with talented individuals such as Yuji Iseki and Masahiko Suzuki. These collaborations have fostered a creative environment that has led to the successful development of his patented technologies.

Conclusion

Katsuhiko Sumida's contributions to the field of materials science through his innovative patents have established him as a prominent figure in the

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