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Pre-treated natural materials in resin moldings with controlled encapsulation and curing conditions address durability and adhesion issues, ensuring long-term stability and aesthetic preservation.

JP3254471UActive Publication Date: 2026-01-26淺沼 みき
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Patent Information

Application Number
JP2025004004U
Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-01-26
Estimated Expiration
2035-11-18

AI Technical Summary

Technical Problem

Conventional resin moldings of natural materials suffer from durability issues due to incomplete drying, yellowing, poor adhesion, and structural defects like peeling and cracking, along with air bubbles and shrinkage.

Method used

The encapsulated natural materials are pre-treated by degreasing, sterilizing, and deodorizing to improve adhesion and stability, using transparent epoxy or UV resin with controlled encapsulation and curing conditions.

Benefits of technology

The treated resin molded products exhibit improved durability, uniform appearance, and structural integrity, preventing mold, decay, and discoloration, with enhanced adhesion and matte finish.

✦ Generated by Eureka AI based on patent content.

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Abstract

We provide resin molded products that have improved long-term stability and durability, prevent structural defects, and improve aesthetics. [Solution] This is a resin molded product made by encapsulating natural materials such as hair, skin, nails, or baby teeth in resin, and has the following characteristics (A) and (B) to ensure long-term stability: (A) The encapsulated pretreated natural material has a matte surface with oil removed, improving adhesion to the resin; (B) The encapsulated pretreated natural material has been completely dried and sterilized / deodorized, so it maintains a state in which the occurrence of mold and decay due to residual moisture is suppressed.
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Description

[Technical Field]

[0001] This invention relates to resin molded products used as accessories and decorative items for preserving and displaying natural materials such as fur, leather, and baby teeth in resin (epoxy resin, UV resin, etc.) for a long period of time. [Background technology]

[0002] Conventional resin moldings containing untreated natural materials have the following structural and quality problems when it comes to long-term storage: 1. Lack of durability: Due to the incomplete drying of the encapsulating material (residual moisture), mold and decay occurred, causing the quality of the resin molded product to deteriorate from the inside. 2. Yellowing and discoloration: After the resin hardens, the hair tends to yellow, and discoloration can occur due to UV rays and oxidation. 3. Poor adhesion: Untreated hair contains oil, which makes the surface of the hair shiny and gives it an unnatural luster. This makes it difficult for the resin liquid to penetrate the material, and the structure makes it prone to peeling and cracking at the interface between the material and resin. 4. Air bubbles and shrinkage: If the degassing process of the encapsulating material is insufficient, shrinkage and warping will occur after the resin hardens, which will impair the structural stability of the resin molded product. Summary of the Invention [Problem to be solved by the invention]

[0003] The objective of the present invention is to provide a resin molded product that solves the structural and quality problems of the prior art described above. [Means for solving the problem]

[0004] In order to solve the above problems, the present invention provides a resin molded product in which natural materials such as hair, skin, nails, or baby teeth are encapsulated in resin, and which has long-term stability and is characterized by having the following features (A) and (B): (A) The encapsulated pre-treated natural material has a matte surface with oil removed, improving adhesion to the resin. (B) The enclosed pre-treated natural materials have been completely dried, sterilized, and deodorized, so the structure maintains a state in which the occurrence of mold and decay due to residual moisture is suppressed. [Effects of the Invention]

[0005] The resin molded product of the present invention has a structure in which the enclosed natural materials have been subjected to a specific pre-treatment, thereby exhibiting the following excellent effects. 1. Improved long-term stability and durability: By completely drying and sterilizing the material, long-term deterioration such as mold, rot, and yellowing is suppressed, allowing resin molded products to maintain their beautiful condition for a long period of time. 2. Preventing structural defects: Removing oil from the surface of the material improves adhesion with the resin, making it less likely for gaps to form between the resin and the material, resulting in a strong structure with less peeling and cracking. 3. Improved appearance: Removing oil gives the material a matte surface, making it easier for resin to penetrate the material, resulting in a uniform luster and allowing the material's original color to be beautifully expressed. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a diagram showing an example of a resin molded article according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0007] [Components of resin molded products] The pre-processed natural material-encapsulated resin molded product of this invention mainly consists of the following components: 1. Resin base: Highly transparent epoxy resin (epoxy resin) or UV resin is used. 2. Encapsulating material (pre-processed natural material): Natural materials such as hair, skin, nails, baby teeth, or power stones.

[0008] [Pretreatment to establish the structural characteristics of the encapsulating material (natural material)] The most important feature of this invention is that the natural materials encapsulated in the resin have a structure that has undergone specific physical and chemical processing as shown below to ensure long-term stability.

[0009] 1. Clean and degreased surface structure The encapsulating materials (especially hair and skin) are thoroughly degreased to improve adhesion with the resin and to prevent unnatural surface shine and peeling over time due to oils. · Cleaning: To remove oil and dirt from the surface of the material, wash it using pet shampoo or similar to wash off the oil. Immersion in degreasing solution: The natural material is then immersed in a degreasing solution such as absolute ethanol for 1-2 minutes. This process removes oil from the surface of the natural material, leaving it matte, and the material is then encapsulated in resin with significantly improved adhesion (no shine, uniform surface).

[0010] 2. Sterilizing, deodorizing and completely drying structure In order to structurally eliminate factors that cause long-term deterioration such as mold, decay, and odor generation, the material undergoes the following treatments. Sterilization and deodorization: By soaking the items in a chemical solution such as enzyme bleach for 2-5 minutes, sterilization and deodorization are carried out, maintaining a hygienic condition. Complete drying: After pre-treatment, the material is dried completely in a well-ventilated room for at least 24 hours to ensure that no moisture remains, which can lead to mold or decay. This complete drying is essential, as moisture can lead to mold.

[0011] 3. Types and compositions of resins As a resin base, it is recommended to use an epoxy resin that is highly transparent and does not yellow over time. When using epoxy resin, the best way to cure it is to mix the base resin (liquid A) and hardener (liquid B) in a 1:1 ratio. Strict adherence to this ratio is important to prevent poor curing and the formation of bubbles.

[0012] [Structural arrangement and proportions of resin molded products] In order to maintain the aesthetics and structural stability of resin molded products, the placement of encapsulating materials is subject to the following restrictions: - Encapsulation ratio: It is recommended to keep the amount of natural material (hair) encapsulated within 5-10% of the total volume of the resin. This will beautifully express the original color of the material and ensure a uniform finish. Placement: Materials such as hair can be made to look beautiful by spreading them out well with tweezers and pouring in a thin layer of resin. Care is taken to seal in the material so that no air bubbles remain.

[0013] [Environmental conditions during molding (means of ensuring structural stability)] To ensure the structural stability and quality of resin molded products, it is desirable that molding operations be carried out in a controlled environment. Temperature: The ideal ambient temperature is around 20-25°C for proper curing of the resin. Humidity: High humidity can easily lead to the inclusion of moisture and air bubbles, so humidity should be kept within 40-60%. Curing: When using epoxy resin, the molded product is left to stand for at least 24 hours until it is fully cured. When using UV resin, it is cured by irradiating it with UV light.

[0014] [Example of molded product] The resin molded products of this invention can be applied to various shapes, such as pendants, necklaces, key chains, rings, earrings, rosary beads, and decorative items in artistic arrangements combined with power stones (see Figure 1).

Claims

[Claim 1] A resin molded product in which natural materials such as hair, skin, nails, or baby teeth are encapsulated in resin, and which has long-term stability and is characterized by having the following characteristics (A) and (B): (A) The encapsulated pre-treated natural material has a matte surface with oil removed, improving adhesion to the resin. (B) The enclosed pre-treated natural materials are completely dried, sterilized, and deodorized, so the structure maintains a state in which the occurrence of mold and decay due to residual moisture is suppressed.