JPH07136008A - Band for wrist watch - Google Patents

Abstract

PURPOSE:To provide a firm product having a hardly vanishing pattern by closely sticking and laminating a top coat layer of a transparent material made of a plastic resin, woven fabric of carbon fibers beneath it, and a band core layer in sequence to form the whole or part of a band for a wrist watch. CONSTITUTION:Patterned woven fabric 1b made of carbon fibers impregnated with a soft resin is closely stuck to a top coat layer 1a made of a transparent material. A band core material 2 is laminated as the underlayer of the woven fabric 1b made of carbon fibers. Such lamination is repeated prescribed times. The same resin material as the band core material 2 or one compatible with it is used for the resin to be impregnated into the carbon fiber woven fabric 1b. The laminated sheet-like band material is pressed into a band shape, and finally a whole outer periphery of the band is covered with a transparent material to form the top coat layer 1a. Hole sections of the band are reinforced against cracks, the quality feeling of the pattern of the woven fabric is improved, and the pattern is prevented from vanishing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic band used for a timepiece.

[0002]

2. Description of the Related Art In a conventional plastic band for a timepiece, a soft polyurethane or vinyl chloride resin is used to fit an arm and injection molding is performed. Further, in order to improve the decorative property, it has been known to perform various processes such as printing on the surface of the band to express various patterns.

[0003]

However, the conventional plastic band has the following problems. (1) Since a soft resin is used to fit the arm, there is a certain limit to the improvement of tensile strength in terms of physical properties, but it has been established as a technology that can obtain strength that can withstand normal use. ing. However, there is still a risk that the band may be cut due to the crack 4 entering from the fixing hole portion depending on the state of use.

(2) The pattern is expressed on the surface of the band by printing or the like, but there is a risk that the pattern may be rubbed and become thin or disappear depending on the use condition. Therefore, an object of the present invention is to modify the surface condition of a plastic band while increasing the strength of the plastic band in order to solve the above-mentioned conventional problems.

[0005]

In order to solve the above problems, the present invention provides a timepiece plastic band,
The whole or a part of the band was made of a material obtained by laminating a carbon fiber woven fabric having a transparent top coat.

[0006]

In the plastic band for a watch constructed as described above, the carbon fiber woven fabric is adhered to the surface of the plastic resin as the core material. At this time, the adhesiveness can be improved by making the resin impregnated into the carbon fiber woven fabric the same as or better compatible with the core material.

Since the carbon fibers are arranged around the fixing hole, the strength around the hole is improved, cracks can be prevented from occurring, and the band can be prevented from being cut. Since the transparent topcoat layer is provided on the surface of the carbon fiber woven fabric, the band surface is modified, and the carbon fiber woven fabric can be patterned to enhance the texture. Further, by using a hard resin for the top coat layer, it is possible to suppress the occurrence of scratches on the band surface.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) In FIG. 1, there is a top coat layer 1a made of a transparent material, and this top coat layer 1a is adhered to a carbon fiber woven fabric 1b in which a soft resin is impregnated. A band as the lower layer of the carbon fiber fabric 1b
The core material 2 is laminated. Such a stack is repeatedly formed, and there is a carbon fiber woven fabric 1b as a lower layer, and the entire circumference is covered with the top coat layer 1a. The carbon fiber woven fabric 1b is impregnated with the same resin as the band / core material 2 or a compatible resin material to improve the adhesion between the two. In band forming, the laminated sheet-shaped band material is formed into a band shape by pressing, and finally the entire outer peripheral surface of the band is coated with a transparent material to form the top coat layer 1a. The number of layers of the carbon fiber woven fabric 1b and the band / core material 2 can be selected in consideration of strength and fit property.

(Embodiment 2) In FIG. 2, a band 3 is provided with a concave portion, and a lower surface of the concave portion is closely adhered to a carbon fiber fabric 1b, and a band / core material 2 is closely adhered thereon, and such a layer is repeated. Fabrics made of carbon fiber as an upper layer 1
b, which is a top coat layer 1a made of a transparent material.
Covered with. In forming such a band, a carbon fiber woven fabric 1b formed into a predetermined shape and size is inserted into an injection molding die and plastic resin resin injection molding is performed as a band / core material. Thus, by using the band material in which the carbon fiber woven fabric 1b is laminated on a part of the band 3 as a part of the band, the flexibility can be secured.

[0010]

As described above, according to the present invention, in the timepiece plastic band, the woven fabric of carbon fiber having the transparent topcoat layer constitutes all or part of the band. , Has the effects described below. Since the carbon fiber woven fabric with high strength is used in the hole portion of the band, the band can be prevented from being cut by cracks. Since the carbon fiber woven fabric having the top coat layer is used, the texture of the woven fabric can be improved. Also, the pattern never disappears.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a plastic band for a timepiece of the invention.

FIG. 2 is a cross-sectional view of the timepiece plastic band of the present invention in which a carbon fiber woven fabric is partially used.

FIG. 3 is a view showing a conventional plastic band for a watch and a state of cracks.

[Explanation of symbols] 1a Top coat layer 1b Carbon fiber woven fabric 2 Band / core material 3 Band 4 Crack

Claims (1)

[Claims] 1. A watch band made of a plastic resin, wherein a top coat layer made of a transparent material, a carbon fiber fabric provided as a lower layer adhered to the top coat layer, and a lower layer adhered to the carbon fiber fabric. A band for a watch, comprising a band material in which a band / core material is laminated as, and the band material is configured as the entire surface or a part of the band.