JPH0659249B2 - Synthetic resin watch band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a synthetic resin wristwatch band having a three-layer integrated structure with a metal transfer material as a surface layer.

[Conventional technology and its problems]

Almost all wristbands made of synthetic resin are made of soft synthetic resin (such as thermoplastic polyurethane), and are produced by injection molding. Since this band is cheaper than those made of metal, leather, etc., it is used very much.

However, the band integrally molded with the synthetic resin as described above, particularly the synthetic resin band colored in a bright color, gradually turns yellow (becomes a yellowish state) as time passes and becomes dirty. There is a drawback that makes you feel like this. For this reason, conventional synthetic resin bands are mainly made of black resin material that does not worry about yellowing (yellowing is not noticeable), but such black bands alone are diversified. Cannot meet the needs of other people. Therefore, it has been considered to give a metallic feeling by mixing metal powder into the band material of the synthetic resin, but there is a drawback that it is not possible to give a feeling like a polished metal surface.

[Object of the Invention]

This invention has been made based on the above background,
It is an object of the present invention to provide a low cost synthetic resin band which does not cause a yellowing problem and can have an aesthetic appearance comparable to that of a metal band.

[Outline of Invention]

In order to achieve the above object, this invention has a three-layer structure in which a synthetic resin band is formed by integrating a surface layer, an intermediate layer and a back surface layer, a metal transfer material is used for the surface layer, and the intermediate layer is hard. By using a crimping layer made of the synthetic resin as a material, it is intended to give an aesthetic appearance comparable to that of a metal band.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. This wristwatch band made of synthetic resin has a band main body 3 formed of an opaque soft synthetic resin such as thermoplastic polyurethane or vinyl chloride, and a surface of the band main body 3. A decorative layer 2 formed of a joined hard synthetic resin such as thermoplastic polyurethane or vinyl chloride, and a metal transfer material 1 press-bonded to the surface of the decorative layer 2 (a film or foil is used). And a plurality of band metal fitting locking holes 5 penetrating the transfer material 1, the decorative layer 2, and the band main body 3, and the band is located at one end of the band main body 3. The decorative layer 2 is provided with a large number of surface lateral grooves 2a perpendicular to the band length direction as shown in FIG. 1 in order to make the hard material flexible. ,
The back surface layer 3 is also provided with back surface lateral grooves 3a similar to the lateral grooves 2a in a smaller number than the surface layer lateral grooves 2a as shown in FIG.

Due to the formation of the lateral grooves 2a and 3a, the band is easily curved and deformed as shown in FIG. 2, and the light reflectance differs for each block divided by the grooves 2a, so that the band feels like a metal band. become.

The synthetic resin wristwatch band having the above structure is produced by the following molding method.

"First step" The band decorative layer 2 is used as a thin primary molded product, and a hard synthetic resin (this synthetic resin is a thermoplastic polyurethane having a hardness that can withstand pressure bonding at the time of transfer of the transfer material 1 described later, Injection molding as shown in FIG. In the band decorative layer 2 which is the primary molded product, the band metal fitting locking hole 5 and the surface lateral groove 2a are simultaneously formed by injection molding using the molding dies 7 and 8.

[Second Step] After the molding of the first step is completed, the mold 7 is moved to the secondary molding position, and the secondary molding (injection molding) using the molds 7 and 9 as shown in FIG. 4 is performed. As a result, the band main body 3 of the opaque soft synthetic resin is integrated with the band decorating layer 2 to form a two-layer structure. In the case of this secondary molding, the band main body 3 is simultaneously molded with the band metal fitting locking hole 5, the band mounting hole 6, and the rear lateral groove 3a.

"Third step" After completion of the secondary molding in the second step, this molded product is subjected to a fifth step.
As shown in the figure, the transfer material 1 is removed from the molds 7 and 9, and is placed on the transfer table 10 as shown in FIG. 5 to transfer the transfer material 1 onto the surface of the decorative layer 2. This transfer method is carried out, for example, by using the vapor deposition foil 11 shown in FIG. 6 having a polyester sheet a, a release layer b, a coloring layer c, a metal layer d, and an adhesive layer e. e is polymerized on the decorative layer 2 so as to face the decorative layer 2, and thermocompression-bonded thereon with a heating head, a heating roller or the like, and the polyester sheet a is peeled off by the release layer b. As a result, the transfer material 1 including the colored layer c, the metal layer d, and the adhesive layer e is transferred to the band decoration layer 2. In this case, the band metal fitting locking hole 5 of the transfer material 1 and the surface lateral groove 2a
The portion corresponding to is not heat-pressed, but is peeled off together with the polyester sheet a. Such partial peeling of the transfer material 1 can be performed by making the shapes of the pressure-bonding portion and the non-pressure-bonding portion of the heating head uneven, or by thermocompression bonding using a perforated masking plate.

〔The invention's effect〕

Since the synthetic resin wrist watch band of the present invention has the metal transfer material pressure-bonded to the surface of the hard decorative layer as described above, the yellowing problem of the band surface can be easily solved, and A comparable aesthetic can be provided by the transfer material. Further, since a plurality of grooves are formed in the hard decorative layer in a direction perpendicular to the longitudinal direction thereof, the bending of the band is extremely smooth, the usability can be maintained well, and the transfer material is a decorative layer. Since it is transferred for each block, the transfer material does not peel off from the decorative layer even when the band bends when worn on the arm, and it has the effect of maintaining an aesthetic appearance comparable to a metal band. is there.

[Brief description of drawings]

FIG. 1 (A) is a plan view showing a synthetic resin wristwatch band of the present invention, FIG. 1 (B) is a central longitudinal sectional view of the wristwatch band, and FIG. 2 is a sectional view showing a curved state of a wristband. , Third
5 to 5 are explanatory views showing the method of forming the wristwatch band in the order of steps, and FIG. 6 is an enlarged sectional view showing a part of the vapor deposition foil used as a transfer material. 1 ... Transfer material, 2 ... Band decorative layer, 3 ... Band mainly.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Shou 51-96468 (JP, U) Seki 58-181214 (JP, U) Seki 54-24422 (JP, U) Seki 58- 114110 (JP, U) Actual Open Sho 58-8319 (JP, U) Actual Open Sho 58-93211 (JP, U) Actual Kohei Hei 2-27770 (JP, Y2)

Claims (3)

[Claims] 1. A band main body made of a soft synthetic resin, a decorative layer made of a hard synthetic resin integrally bonded to the surface of the band main body, and a decorative layer formed on the surface of the decorative layer. A wristwatch band made of synthetic resin, comprising a plurality of grooves formed in a direction perpendicular to the longitudinal direction and a metal transfer material pressure-bonded to the surface of the decorative layer. 2. The band main body is formed with a plurality of grooves in a direction perpendicular to the longitudinal direction thereof, and the number of the grooves of the band main body is smaller than the number of the grooves of the decorative layer. A wrist watch band made of the synthetic resin according to item 1. 3. The synthetic resin watch band according to claim 1 or 2, wherein the transfer material is a metal film or foil.