Location History:
- Ibaragi, JP (1984)
- Nara, JP (1994 - 2010)
Company Filing History:
1 out of 79 
1 out of 1 
1 out of 107 Years Active: 1984-2010
Title: Tsuneo Doi: Innovator in Thermoplastic Resin Technology
Introduction
Tsuneo Doi is a notable inventor based in Nara, Japan. He has made significant contributions to the field of thermoplastic resin technology, holding a total of 3 patents. His work focuses on enhancing the properties and manufacturing processes of foamed products.
Latest Patents
Doi's latest patents include innovative methods for producing thermoplastic resin expandable granules. One patent describes a method that involves injecting a blowing agent under pressure into melted thermoplastic resin, extruding it through small holes in a die, and cooling it in a coolant liquid. This process results in expandable granules with specific shearing speeds and melt viscosities. Another patent details a polypropylene resin foamed sheet designed for thermoforming, which incorporates an inorganic fine powder. This sheet exhibits controlled density, thickness, and shrinkage properties, making it suitable for various applications.
Career Highlights
Throughout his career, Tsuneo Doi has worked with prominent companies such as Sekisui Kaseihin Kogyo and Sekisui Plastics. His experience in these organizations has allowed him to refine his expertise in thermoplastic materials and their applications.
Collaborations
Doi has collaborated with notable colleagues, including Motoshige Hayashi and Kiyotaka Matsuoka. Their joint efforts have contributed to advancements in the field of thermoplastic resin technology.
Conclusion
Tsuneo Doi's innovative work in thermoplastic resin technology has led to significant advancements in manufacturing processes and product properties. His contributions continue to influence the industry and inspire future innovations.