JPS6244204A - Wristwatch band made of synthetic resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] 1. The present invention relates to a synthetic resin watch band having a three-layer integrated structure with a transfer foil as an intermediate layer.

[Conventional technology and its problems]

Most synthetic resin watch bands are made of soft synthetic resin (such as thermoplastic polyurethane) and are produced by injection molding. This band is used very often because it is cheaper than those made of metal, leather, etc.

However, as mentioned above, bands made of synthetic resin that are integrally molded, especially bands made of brightly colored synthetic resin, gradually turn yellow (become yellowish) and become dirty. There is a drawback that it feels like this. For this reason, conventional synthetic resin bands are mainly made of black resin material that does not cause yellowing (yellowing is not noticeable). Therefore, it is desired to develop an inexpensive synthetic resin band that has an aesthetic appearance comparable to that of metal hands and leather bands, and that does not cause yellowing problems.

[Purpose of the invention]

This invention was made based on the above background,
The purpose is to provide an inexpensive synthetic resin band that can exhibit an aesthetic appearance comparable to that of metal bands or leather bands, and that does not cause yellowing problems.

[Summary of the invention]

In order to achieve the above object, this invention has a synthetic resin band with a three-layer structure in which a surface layer, an intermediate layer, and a back layer are integrated, a decorative transfer foil is used for the intermediate layer, and the surface layer is blank. By using a transparent synthetic resin that does not yellow or yellow easily, it is intended to give an aesthetic appearance comparable to metal bands or leather bands.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. This synthetic resin watch band has a back layer 3, which is the main part of the band, made of a soft synthetic resin such as opaque thermoplastic polyurethane or vinyl chloride; (A surface layer 2 molded from a transparent hard synthetic resin that does not yellow or hardly yellow (synthetic resin such as thermoplastic polyurethane mixed with an ultraviolet absorber or vinyl chloride), and this surface layer 2 and a back layer 3. The band has a three-layer integrated structure consisting of a transfer foil 1 which is an intermediate layer of the band sandwiched therebetween, and this band has a surface layer 2.
, a hand fitting locking hole 5 on the step number side that penetrates the intermediate layer (transfer foil 1) and the back layer 3, and a band fitting mounting hole 6 located at one end of the band back layer 3, and the surface layer 2 has a In order to give flexibility to the hard material, a large number of surface lateral grooves 2a perpendicular to the band length direction are provided as shown in FIG. The surface layer lateral grooves 2a are produced by the following molding method.

"First step" The band surface layer 2 is made into a thin primary molded product using a transparent non-yellowing or yellowing-resistant hard synthetic resin (this synthetic resin can withstand the pressure bonding during transfer described later in the transfer foil 1). As shown in FIG. 2, injection molding is performed using hard thermoplastic polyurethane mixed with an ultraviolet absorber, vinyl chloride, etc. The band surface layer 2, which is the next molded product, has the above-mentioned band fitting locking hole 5 and surface lateral groove 2a, or the molding die 7,
Simultaneously molded by injection molding using 8.

"Second Step" After the primary molding in the first step is completed, the mold moving operation is temporarily stopped in the process of transferring the mold 7 holding the next molded product (band surface layer 2) to the secondary molding position, At this position, the transfer foil 1 is transferred to the band surface layer 2 as shown in FIG.

This transfer method is carried out using, for example, a steamed stone foil 11 shown in FIG. The layer e is placed on the surface layer 2 so that it faces the surface layer 2, and the polyester sheet a is peeled off at the release layer by thermocompression bonding from above using a heating head, heating roller, etc. As a result, the transfer foil 1 consisting of the colored layer C, the metal layer d, and the contact layer e is transferred onto the band surface layer 2.

In this case, - avoid applying foil transfer to the entire surface of the primary molded product (bent surface layer 2), and - provide a band-like non-transfer area around the next molded product, or place letters or patterns on the next molded product (bent surface layer 2). If so, it is necessary to secure a non-transfer area of an appropriate area between the characters and patterns.

In addition, when the above-mentioned vapor-deposited foil 11 is used as the transfer foil 1, this vapor-deposited layer can give a feeling like a metal band. , a printed foil consisting of a release layer, a printed layer, a metal layer, and an adhesive layer), it is possible to create a leather band-like feel.

"Third step" After the transfer of the second step is completed, the mold 7 is moved to the secondary molding position, and here secondary molding (injection molding) as shown in FIG. 4 is performed using the molds 7 and 9. As a result, the band back layer 3 made of opaque soft synthetic resin is integrated with the band surface layer 2, and molded into a state where it is inserted inside the transfer foil 1 as an intermediate layer. In the case of this secondary molding, the above-mentioned band fitting locking hole 5, band attachment hole 6, and back side lateral groove 3a are simultaneously formed on the band back layer 3.

The watch band of the present invention is molded by the above molding method, and the synthetic resin band obtained by this molding method has a surface layer 2, an intermediate layer (transfer foil 1), and a back layer 3 completely integrated. , the transfer foil 1 is protected by a surface layer 2 of transparent synthetic resin.

〔Effect of the invention〕

The synthetic resin watch band of this invention has a three-layer structure in which the surface layer, middle layer, and back layer are integrated as described above, uses a decorative transfer foil for the middle layer, and has a non-yellowing or non-yellowing surface layer. Since it is made of a transparent synthetic resin that is resistant to yellowing, this surface layer can protect the transfer foil from abrasion, peeling, etc., and the conventional yellowing problem can be solved.
The transfer foil can provide an aesthetic appearance comparable to that of a metal band or leather band, and the intermediate sandwich transfer foil is not subjected to tension or compression when the band is bent, so there is no problem of damage to the transfer foil, which is weak against tension. be effective.

[Brief explanation of the drawing]

FIG. 1(A) is a partially cutaway plan view of a synthetic resin wristwatch band of the present invention, FIG. 1(B) is a central vertical sectional view of the wristwatch band, and FIGS. 2 to 4 are An explanatory drawing showing the method of forming the watch band in the order of steps, and FIG. 5 is an enlarged sectional view showing a part of the steamed foil used as the transfer foil. 1... Transfer foil as band intermediate layer, 2... Band surface layer, 3... Hand back layer. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 (B) Figure 3 s'lA

Claims (1)

[Claims] It is a synthetic resin band with a three-layer structure that integrates a surface layer, an intermediate layer, and a back layer.The intermediate layer uses a decorative transfer foil, and the surface layer is made of transparent synthetic resin that does not yellow or does not easily yellow. A synthetic resin watch band characterized by being made of resin.