Gunji Matsuda

Title: Gunji Matsuda: Innovator in Packaging Technology

Introduction

Gunji Matsuda is a notable inventor based in Isehara, Japan, recognized for his contributions to packaging technology. He holds a total of four patents, showcasing his innovative approach to solving challenges in the packaging of carbonated beverages.

Latest Patents

One of Matsuda's latest patents is for a bottle designed specifically for carbonated drinks. This bottle is created through biaxial draw-blow molding of a polyester that includes a surface active agent, primarily composed of ethylene terephthalate units. The design ensures that the barrel wall portion of the bottle is molecularly oriented biaxially, achieving a density of at least 1.34 g/cm³ at 20°C. This innovative design effectively controls the transfer speed of carbon dioxide gas from the liquid to the gas phase when the bottle is opened, preventing the cap missile phenomenon and maintaining the drink's carbonation during repeated sealing and opening.

Another significant patent by Matsuda is for a lined closure cap. This cap features a thermoplastic resin liner that is pressed formed onto the inner surface of the cap shell. The design ensures that the difference between the intrasurface orientation index of the outer peripheral portion and the central portion of the liner does not exceed 0.37. This precise engineering enhances the cap's effectiveness as a container cover.

Career Highlights

Throughout his career, Matsuda has worked with prominent companies in the packaging industry, including Toyo Seikan Kaisha, Ltd. and Japan Crown Cork Co., Ltd. His experience in these organizations has contributed to his expertise in developing innovative packaging solutions.

Collaborations

Matsuda has collaborated with notable professionals in his field, including Fumio Mori and Junichi Itsubo. These collaborations have likely enriched his work and led to advancements in packaging technology.

Conclusion

Gunji Matsuda's innovative patents and career in packaging technology highlight his significant contributions to the industry. His work continues to influence the design and functionality of packaging for carbonated beverages, ensuring quality and consumer satisfaction.