This inventor holds 8 USPTO granted patents. Top assignee: Toray Industries, Inc.. Active years: 1976-1994.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Ehime, JA (1976)
- Ehime-ken, JP (1978)
- Ehime, JP (1982 - 1994)
Company Filing History:
Years Active: 1976-1994
Title: Innovations of Hiroyoshi Tanaka
Introduction
Hiroyoshi Tanaka is a prominent inventor based in Ehime, Japan. He has made significant contributions to the field of fiber technology, holding a total of 8 patents. His work focuses on the development of advanced acrylic fibers and polyvinyl alcohol fibers, which have various applications in textiles and materials science.
Latest Patents
One of Tanaka's latest patents is a method for the production of multi-layered conjugated acrylic fibers. This innovative fiber comprises different acrylic polymers that are conjugated along the fiber axis in layers. On average, the fiber contains more than two layers of acrylic polymers. The shrinkage forming ratio in boiling water of the conjugated acrylic fiber is between 7-15%, and the shrinkage forming stress ranges from 5-20 mg/denier. To enhance the water absorbency of the acrylic fiber, one or more of the acrylic polymers may contain 0.3 to 2.0 mmole/g of carboxylic acid groups. The production process involves introducing the polymers into a static mixer to retain separate layers, followed by spinning, drawing, washing, and drying. If water-absorbent fiber is desired, it undergoes treatment with an alkali solution.
Another notable patent is for a high-tenacity water-soluble polyvinyl alcohol fiber. This fiber is composed of a polyvinyl alcohol polymer with a degree of polymerization of at least 1500 and a degree of saponification of 80 to 99 mol %. It boasts a tensile strength of at least 10 g/d and an initial modulus of at least 100 g/d, with a water-soluble temperature of 100°C or below. The process for producing this fiber is also outlined in the patent.
Career Highlights
Hiroyoshi Tanaka is currently associated with Toray Industries, Inc., a leading company in the field of advanced materials. His work at Toray has allowed him to push the boundaries of fiber technology and contribute to innovative solutions in the industry.
Collaborations
Tanaka has collaborated with notable colleagues such as Mitsuo Suzuki and Fujio Ueda. Their combined expertise has fostered advancements in fiber technology and has led to the successful development of new materials.
Conclusion
Hiroyoshi Tanaka's contributions to
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile