JPS6357530B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flat foil yarn with varying thickness and a method for producing the same.

Prior Art Conventional flat foil threads are made of homogeneous layers throughout, so although they are beautiful, they have a flat and monotonous appearance, which alone does not have a design effect. Attempts have therefore been made to develop embossed flat foil threads and flat foil threads with sheet pieces attached, but the former lacks bright color, and the latter lacks flexibility and is difficult to handle. Furthermore, since flat foil threads are usually formed into linear threads of a constant width, twisted gold and silver threads and fabrics produced using them have to have a monotonous appearance.

OBJECTS OF THE INVENTION An object of the present invention is to provide an attractive flat foil yarn that varies in thickness and at the same time changes in bright color, and a method for producing the same.

Structure of the Invention The flat foil yarn of the present invention is made by laminating a metal thin film on a thermoplastic film, and the thickness is changed by partially stretching the film.

That is, in the present invention, by partial stretching,
Because the flat foil thread is deformed, the threads in the stretched part are thinner and thinner than in the unstretched part, and at the same time, the thin metal film in the stretched part has minute cracks, which reduces the gloss to some extent. . Therefore, even a single flat foil thread can have an excellent design effect with variations in thickness and metallic luster between the stretched and unstretched parts.

The flat foil yarn of the present invention is obtained by cutting a foil sheet made by laminating a metal thin film onto a thermoplastic film into threads, and then applying tension to two pairs of pressure rolls arranged at an appropriate interval. The film can be produced with good workability by keeping the foil threads threaded through the film while maintaining the pressure, intermittently pressing the foil thread with a pressing device provided between the pressing rolls, and stretching the film in the pressed portions.

The thread sent to the pressure roll may be the foil thread obtained from the foil sheet wound onto a bobbin, or the foil thread cut from the foil sheet may be directly guided to the pressure roll after cutting. . In addition, the foil thread is 0.5
It is preferable to use one with a width of mm to 3 mm because it has an excellent design effect.

A foil sheet is a thermoplastic sheet, such as a polyester sheet, on which one or more thin metal films are applied either directly or after applying an anchor coat, using vapor deposition, electroless plating, or other known methods. may further be provided with a protective coat of synthetic resin.

In the present invention, since there is a risk that the adhesion of the metal thin film may deteriorate during stretching, it is preferable to apply an anchor coat such as polyamide or acrylic resin before forming the metal thin film, and between the protective coat and the metal thin film. It is also good to be anchor coated for the same purpose.

Note that the pressing device used in the above manufacturing method may be one that uses a vertical movement of a pressing member, or may be a cam mechanism that is formed so as to partially press the foil thread strongly.

Example After cutting a foil sheet consisting of thermoplastic film\anchor coat\metal\anchor coat\protective film into threads, the obtained foil thread 1 is successively passed through two pairs of pressure rolls 2a as shown in Fig. 1. , 2b and 3a, 3b
Maintain your tension as you pass.

A pressing device 4 is disposed between the crimping rolls 2a, 2b and 3a, 3b, and by driving the pressing device 4, in the example shown in FIG. 1, by rotating the shaft 5 of the device 4, the convex portion 6 is lowered. Then, when the foil thread 1 is pushed down, the thermoplastic film of the foil thread 1 in that part is stretched,
The foil thread 1 becomes thinner, the convex part 6 rises again, and the foil thread 1
When separated from the foil yarn 1, the foil yarn 1 in that part maintains its original thickness and becomes a deformed flat foil yarn that appears alternately thick and thin, as shown in FIG.

The thick part 8 of this flat foil thread 7 has a totally reflective, bright color similar to the foil thread 1 before processing, but the thin part 9 has a slightly changed luster due to microscopic cracks in the metal layer and has a very decorative effect. Becomes excellent.

The flat foil yarn 7 sent out from the pressure rolls 3a and 3b is wound as it is on a warping roll, and woven using silk thread for the weft.The woven fabric has a very interesting texture with varying weaving density and subtle changes in gloss. It was hot. Note that the twisted gold and silver thread using the flat foil thread 7 is also easier to handle than ever before because it is thick and thin, and has excellent design effects.

As the pressing device 4, a cam mechanism in which the pressing surface is sequentially changed as shown in FIG. 3 may be used, or a pressing mechanism such as a piano hammer may be used.

Effects of the Invention In the present invention, flat foil yarn with varying thickness can be obtained by drawing the base film of the flat foil yarn.
It has a natural appearance and texture, and is easy to manufacture. Further, since minute cracks occur in the metal thin film of the flat foil yarn as it is stretched, the flat foil yarn of the present invention becomes a product that not only varies in thickness but also varies in metallic luster.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, FIG. 2 is a plan view showing an example of the flat foil yarn of the present invention, and FIG.
The figure is an explanatory diagram of main parts showing an example of a pressing device used in the present invention. 1... Foil thread, 2a, 2b, 3a, 3b... Pressing roll, 4... Pressing device, 5... Shaft, 6... Convex portion, 7... Deformed flat foil thread, 8... Thick portion, 9 ……
thin part.

Claims (1)

[Scope of Claims] 1. A deformed flat foil yarn, which is made by laminating a metal thin film on a thermoplastic film, and whose thickness is varied by partially stretching the film. 2 Foil yarn 1 obtained by cutting a foil sheet made of a thermoplastic film laminated with a metal thin film into yarn is placed under tension between two pairs of pressure rolls 2a, 2b and 3a, 3b arranged at a distance. A modification characterized in that the foil yarn 1 is intermittently pressed by a pressing device 4 provided between the pressure rolls 2a, 2b and 3a, 3b to stretch the film of the foil yarn 1 in the pressed portions. Method for manufacturing flat foil yarn. 3. The method according to claim 2, characterized in that after cutting the foil sheet into threads, the foil threads 1 are subsequently sent to pressure rolls 2a, 2b and 3a, 3b. 4. The method according to claim 2 or 3, wherein a metal thin film is formed on a thermoplastic film anchor-coated. 5. The method according to any one of claims 2 to 4, wherein a synthetic resin protective film is formed on the metal thin film. 6. The method according to any one of claims 2 to 5, wherein the pressing device has a cam mechanism.