Handprint and footprint keychain

The keychain structure with a plastic plate, ink, and resin layers stabilizes ink drawings by preventing bleeding and maintaining finish quality through controlled resin application and curing processes.

JP3255097UActive Publication Date: 2026-03-16濱田 千鶴
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-12-19
Publication Date
2026-03-16

AI Technical Summary

Technical Problem

Ink handwriting and pen drawing directly formed on a plastic plate tend to bleed and flow during resin coating, leading to unstable finishes and quality issues, particularly affecting thin lines and fine drawings.

Method used

A keychain structure comprising a plastic plate, ink layer, and resin layer is designed to prevent bleeding by ensuring stable bonding of the resin layer, with a process that includes ink preparation, heating, resin application, and curing to maintain finish quality.

Benefits of technology

The structure suppresses variations in finish and bleeding, ensuring stable and reproducible keychains with adjustable aesthetic appeal, suitable for various applications and client preferences.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 0003255097000001_ABST
    Figure 0003255097000001_ABST
Patent Text Reader

Abstract

This product provides a keychain that prevents bleeding, flowing, and air bubbles during resin curing of handprint ink or pen drawings directly formed on a plastic plate, resulting in a long-term stable finish and enabling the creation of an optimal finish that meets the client's wishes. [Solution] The keychain has a laminated structure comprising a base layer made of a plastic plate 1, a handprint layer made of water-based pigment ink formed on the base layer, a pen drawing and stone decoration layer formed on or around the handprint layer, and a transparent resin layer 3 that integrally covers and hardens these layers. Using a unique technique, the handprint ink and drawing lines on the plastic plate are uniformly adhered, suppressing bleeding and flow that occurs during resin application. Furthermore, the structure allows for optimal adjustment of the finished product by adjusting the amount of ink and combining decoration processes according to the client's wishes.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention is a key holder that directly performs ink handwriting or pen drawing on a plastic plate and prevents bleeding, flowing, and generation of bubbles in the process of laminating resin.

Background Art

[0002] Conventionally, ink directly drawn on a plastic plate was likely to bleed during resin coating, and stable quality as a finished product could not be ensured.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Ink handwriting and pen drawing directly formed on a plastic plate are likely to bleed and flow under the influence of a solvent component and pressure during resin coating, resulting in problems such as unclear outlines of the handwriting or bleeding of decorative lines. In particular, thin lines, fine drawings, and shaded ink handwriting are likely to bleed depending on the compatibility with the resin, and it has been difficult to stably ensure the quality of the work. The present invention aims to solve these problems and prevent bleeding, flowing, and generation of bubbles during resin curing for both ink handwriting and pen drawing directly formed on a plastic plate, and to obtain a long-term stable finish.

Means for Solving the Problems

[0004] This invention was made to solve the problem that handprints and pen drawings formed directly on a plastic plate with stamp ink tend to bleed during resin coating, resulting in an unstable finish. The keychain according to this invention has a structure comprising a plastic plate, an ink layer formed on the surface of the plastic plate, and a resin layer formed on the surface of the ink layer. By removing excess ink, the resin layer can be stably bonded, thus enabling the above structure. With this structure, it is possible to suppress bleeding that tends to occur during resin coating in both handprint ink and pen drawings formed directly on the plastic plate, and to ensure aesthetic appeal and stable finish. [Effects of the Invention]

[0005] This invention, by employing a structure in which a plastic plate layer, a handprint layer, a decorative layer, and a resin layer are sequentially laminated, suppresses variations in finish and bleeding during resin application, which were common in conventional handprint works using plastic plates, thereby enabling stable quality. Furthermore, because the decorative layer has an adjustable structure, the expression, such as softness or clarity, can be flexibly set according to the application and the client's wishes. This allows for expression that suits the application and the client's wishes, such as for anniversaries or gifts, while suppressing variations in finish quality and enabling consistent and highly reproducible delivery. [Brief explanation of the drawing]

[0006] [Figure 1] This figure is a front view showing the form of a keychain. [Figure 2] This diagram shows the cross-sectional structure of the keychain body. [Modes for carrying out the invention]

[0007] The following describes an embodiment of the keychain manufacturing method according to the present invention. (1) Handprint forming process The handprint of an infant or young child is directly pressed onto the surface of a plastic plate using stamp ink. It is desirable to ensure that the ink is evenly distributed across the entire hand, rather than being concentrated in one area. (2)Drawing process After the handprint has dried, if necessary, draw decorative lines, illustrations, etc. directly onto the plastic plate using a waterproof pen. (3) Pre-treatment process (ink preparation process) If there are inconsistencies in the density of the handprint ink or drawing ink, even out the ink layer. Additionally, if excessive ink is applied, lightly remove it to adjust the amount and prevent uneven ink density and ink buildup. (4)Heating reduction process To shrink the plastic sheet to a predetermined size, it is heated using a household toaster oven. The plastic sheet softens upon heating and shrinks rapidly at a predetermined rate, requiring careful control of the temperature and heating time. (5) Finish adjustment process After the handprint and drawing areas are formed on the plastic sheet during the shrinking process, accent elements are added according to the intended use of the artwork and the client's wishes. This allows for the creation of finishes tailored to the desired atmosphere and appearance of each piece, such as commemorative pieces or gifts. (6) Resin coating process Next, the resin is uniformly applied onto the ink layer. Due to the pressure bonding process of this invention, the ink layer is stable, making it less likely for bleeding or contour distortion to occur during resin application. (7) Curing process The resin is cured using a UV lamp or LED lamp. After curing, a second coat or other application is made as needed to enhance durability. (8) Finishing process Finally, the keychain hardware is attached, and the product is provided as a finished item. Through the above process, this invention can reliably manufacture high-quality handprint keychains that prevent blurring of handprints and drawn lines while allowing for finish adjustments according to the client's wishes. [Explanation of Symbols]

[0008] 1 Plastic sheet 2 Ink Layers 3 Resin

Claims

[Claim 1] This invention relates to a key holder characterized by having a laminated structure comprising a base layer made of a plastic plate, a handprint layer formed on the base layer using aqueous pigment ink, a pen drawing and stone decoration layer formed on or around the handprint layer, and a transparent resin layer that integrally covers and hardens these layers.