Kao has been granted a patent for a fiber collection tool used in electrospinning. The tool, which can be held by hand, includes an electroconductive section and a surface section. The method involves collecting fibers spun by the user using the tool and producing a deposit of the fiber on its surface. The deposit can then be transferred onto an object to create a film. GlobalData’s report on Kao gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Kao, nanoemulsion cosmetics was a key innovation area identified from patents. Kao's grant share as of September 2023 was 38%. Grant share is based on the ratio of number of grants to total number of patents.

Patent granted for a fiber collection tool for electrospinning

Source: United States Patent and Trademark Office (USPTO). Credit: Kao Corp

A recently granted patent (Publication Number: US11773512B2) describes a method for producing a fiber deposit using electrospinning. The method involves collecting a fiber with a fiber collection tool and producing a deposit of the fiber on the surface of the tool. The fiber collection tool includes an electroconductive section in its interior, and the electrospinning is performed while the user holds the tool with a hand or holds an electric conductor in contact with the tool.

The patent also discloses a method for producing a film on the surface of an object using electrospinning. The film includes a fiber deposit and is formed by the user performing electrospinning with an electrospinning device. The fiber collection tool, which has an electroconductive section in its interior, is used to collect the fiber and form the film. The user then presses the tool against the surface of the object to transfer the film onto it.

The fiber collection tool described in the patent has specific characteristics. It has a volume electrical resistivity of 1010 O·cm or less, indicating its ability to conduct electricity. Additionally, the tool may have a surface section outside the electroconductive section that has a surface electrical resistivity greater than 1011 O/cm2, suggesting a non-conductive surface. The tool may also have elasticity, allowing for flexibility during the electrospinning process.

Various additional features are mentioned in the patent, such as the presence of depressions or napped fiber on the surface of the fiber collection tool. The tool may also include an agent that aids in releasing the film from the tool's surface. Furthermore, the method may involve applying an agent to increase adhesiveness between the object and the film before pressing the tool against the object's surface.

Overall, this patent presents methods for producing fiber deposits and films using electrospinning techniques. The inclusion of an electroconductive section in the fiber collection tool allows for efficient electrospinning, while the specific characteristics of the tool enhance its functionality and the adhesiveness of the resulting film.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.