Takashi Kitsunai

Title: Takashi Kitsunai: Optical Disc Materials and Durability

Introduction

Takashi Kitsunai is an inventor associated with Kitaadachi-gun, Japan. His work includes optical-disc technologies and ultraviolet-curable compositions designed to improve the durability and bonding of optical discs. He is credited with 2 patents and worked at Dainippon Ink and Chemicals, Incorporated.

Latest Patents

Kitsunai’s listed patents address optical-disc durability and the production of optical discs.

“Optical disk and ultraviolet-curing composition for optical disk” describes a way to improve the environmental durability of discs made by bonding two substrates, each with an information-recording layer and a thin silver-based reflective film. The disclosed approach uses an ultraviolet-curable composition with a cured-film water absorption rate of no more than 2.0 wt% and water-vapor permeability of no more than 70 g/m·day at a film thickness of 50 μm. The patent also specifies an error-rate ratio of 10 or less after testing at 80°C and 85% relative humidity for 96 hours.

“Optical disc and process for producing optical disc” focuses on bonding substrates with reflective layers made from silicon compounds. It describes an ultraviolet-curable composition containing an epoxysilane or (meth)acrylsilane coupling agent, an ultraviolet-curable compound, and a photopolymerization initiator. The composition is intended to address adhesion challenges that conventional ultraviolet-curable materials may encounter with these reflective layers.

Career Highlights

Kitsunai’s patent work reflects a focus on materials and manufacturing considerations in optical-disc technology. The inventions address environmental resistance, moisture control, and adhesion between disc substrates and reflective layers.

Collaborations

Kitsunai’s listed coworker is Kazuo Murakami. The available information identifies their professional association but does not specify particular joint projects.

Conclusion

Takashi Kitsunai’s two listed patents concern improving optical-disc durability and developing ultraviolet-curable compositions for reliable bonding, highlighting materials engineering as a central theme of his inventive work.