To provide the antibacterial properties of copper ions to shoes, footwear, and the inside of the toes of slippers used by an unspecified number of people, the antibacterial puff is made by molding wool-like copper fibers into a sphere and wrapping it in nonwoven fabric.The puff has a shape that can change and remember the shape of each individual's foot.
A copper wool puff in nonwoven fabric adapts to shoe shapes, providing long-lasting antibacterial protection against foot odor and diseases by utilizing copper ions, addressing the limitations of existing solutions.
Patent Information
- Application Number
- JP2025002320U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2035-06-26
AI Technical Summary
Existing antibacterial solutions for shoes and slippers, such as sprays and insoles, are inconvenient, provide temporary protection, and fail to adapt to different shoe shapes, while copper fiber socks are impractical for many users.
A copper wool structure is molded into a puff shape, wrapped in nonwoven fabric, and placed in the toe area of shoes or slippers, adapting to the shape of the toe for comfortable fit and providing long-lasting antibacterial protection through copper ions.
The copper puff effectively suppresses bacterial growth causing foot odor and diseases like athlete's foot, offering a comfortable, durable, and economical antibacterial solution suitable for personal and public hygiene.
Smart Images

Figure 0003252677000001_ABST
Abstract
Description
[Technical Field]
[0001] This invention relates to a shape-changeable antibacterial puff for shoes, footwear, and slippers, which is made by wrapping wool-like copper fibers in nonwoven fabric. [Background technology]
[0002] The inside of shoes is a moist, closed space, and not only does it cause bad odors due to bacteria breeding on the proteins and sebum contained in human sweat, but it can also lead to problems such as athlete's foot caused by tinea fungus and onychomycosis caused by fungi penetrating into the nails. To solve these problems, measures have been taken such as antibacterial and deodorizing sprays containing silver ions, socks with silver or copper woven into the fibers, and copper fibers placed in shoe insoles. In addition, the presence of various bacteria and the possibility of infection are assumed in slippers used by an unspecified number of people in hospitals and school slippers for visitors, but the main sterilization and antibacterial measures have been disinfection with chemicals such as alcohol. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Patent Publication No. 54-107186 [Patent Document 2] Mito 3132740 [Patent Document 3] Jitsuzenhei 03-127510 [Patent Document 4] Mito 3196342 [Non-patent literature]
[0004] [Non-Patent Document 1] Hisamitsu Pharmaceutical Co., Ltd. Butenalock ▲R ▼ Spray Hisamitsu Pharmaceutical Co., Ltd. Official Website https: / / www.hisamitsu.co.jp / healthcare / products / 220.html [Non-patent document 2] HIRAI Co., Ltd. Aoreiru Cure Fine Socks https: / / aoreiru.com / socks / [Non-patent document 3] Japan Copper Center, General Incorporated Association "Super antibacterial and antiviral properties of copper" Summary of the Invention [Problem to be solved by the invention]
[0005] Among the background art, sprays have the drawbacks of requiring frequent application inside shoes, limiting the duration of antibacterial activity, requiring repeated purchases of the spray, and causing concerns about spray ingredients remaining inside shoes. In addition, it is not practical to change all socks into copper fiber socks when wearing shoes, and women often wear stockings instead of socks before putting on shoes. Shoe insoles are not very versatile and can fit a variety of shoe shapes and sizes, and depending on the material and structure of the insole, they may impair the fit of the shoe or, in the case of sports shoes, their functionality. [Means for solving the problem]
[0006] To solve this problem, a copper wool structure is wrapped in a puff shape with nonwoven fabric and pressed into the gaps in the toes of shoes or slippers, where it is glued in place. The puff pressed into the toe changes shape and memorizes its shape to fit the toe, resulting in minimal discomfort for the toes. This invention addresses the above issues by placing copper, which has antibacterial properties, inside the toe area of shoes and slippers, addressing the odors caused by bacterial growth due to sweating inside shoes and the bacteria that cause athlete's foot. This utilizes the trace metal properties of copper ions, making it suitable for not only personal use but also public hygiene, such as in hospital slippers. The device is not bulky, and once worn, the trace metal properties of copper ions last permanently, offering long-lasting antibacterial effects and economical advantages. [Effects of the Invention]
[0007] As mentioned above, the copper shoe puff of this invention is expected to solve the problem of foot odor caused by sweaty feet of people wearing shoes, as well as the risk of bacterial skin diseases such as athlete's foot and nail fungus, by suppressing and inactivating the growth of the causative bacteria through the natural antibacterial properties of copper, and therefore can be used in addition to conventional antibacterial measures to complement their effectiveness. [Brief explanation of the drawings]
[0008] [Figure 1] 1 is a front view showing an embodiment of an antibacterial puff for shoes and slippers according to the present invention. [Figure 2] A front view of the copper wool fibers in this antibacterial puff. [Figure 3] Cross-sectional view of the antibacterial puff. DETAILED DESCRIPTION OF THE INVENTION
[0009] The present invention will be described below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments. "First embodiment" As shown in Figure 1, an appropriate amount of copper wool material was softly formed into a sphere and then wrapped in nonwoven fabric to form a three-dimensional puff. [Example]
[0010] The puff-shaped body shown in Figure 1 was placed inside the shoe at the toe area and pressed down with adhesive tape attached to one side of the puff.
[0011] The puff-shaped body shown in Figure 1 was placed inside the toe area of the slipper and pressed down with adhesive tape attached to one side of the puff. [Explanation of symbols]
[0012] 1. Copper wool body 2. Nonwoven puff fabric for packaging copper wool
Claims
1. An antibacterial material made of wool-like copper fibers made from thin copper wires, wrapped in a puff of breathable and water-permeable nonwoven fabric.
2. The antibacterial material according to claim 1 is characterized in that it can be pushed into the inside of the toe of shoes or slippers, and can easily change its shape and memorize the shape.
Citation Information
Patent Citations
Method of sterilizing and deodorizing interior of shoe
JP1979107186A
JP1991127510U
shoe insole
JP3132740U
shoe insoles
JP3196342U