This inventor holds 3 USPTO granted patents. Top assignees: Mitsui Chemicals, Inc., Mitsui Petrochemical Industries, Ltd.. Active years: 1994-2002.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Ichihara, JP (1994 - 2000)
- Chiba, JP (2002)
Company Filing History:
2 out of 1,817 
1 out of 1,008 Years Active: 1994-2002
Title: The Innovations of Sadamu Hirakawa
Introduction
Sadamu Hirakawa is a notable inventor based in Ichihara, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the development of advanced resin compositions. With a total of 3 patents to his name, Hirakawa's work has had a substantial impact on packaging materials and their applications.
Latest Patents
Hirakawa's latest patents include a polyolefin resin composition that features an ethylene-based polyolefin with specific density and melt flow rate characteristics. This composition incorporates a phosphorous compound and at least one heat stabilizer, ensuring excellent heat resistance, moisture resistance, and discoloration resistance. Notably, when used as packaging material, it does not impair the taste or odor of the contents. Another significant patent is a sealant resin composition designed for retort packaging film. This composition utilizes high-density polyethylene as the main resin and a linear low-density polyethylene polymerized with a metallocene catalyst. The resulting sealant film exhibits high impact strength and heat sealing strength, making it resistant to whitening and deformation during boiling sterilization.
Career Highlights
Throughout his career, Hirakawa has worked with prominent companies such as Mitsui Chemicals, Inc. and Mitsui Petrochemical Industries, Ltd. His experience in these organizations has allowed him to refine his expertise in polymer materials and their applications in various industries.
Collaborations
Hirakawa has collaborated with notable colleagues, including Naoshi Hamada and Shigeo Ozaki. These partnerships have contributed to the advancement of innovative solutions in the field of polymer chemistry.
Conclusion
Sadamu Hirakawa's contributions to the field of polymer chemistry through his innovative patents have significantly advanced packaging technology. His work continues to influence the industry, ensuring that materials are not only effective but also maintain the integrity of their contents.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile