JPS60208010A - Flat cable and method of producing same - 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 (Technical Field) The present invention relates to a flat cable and a method for manufacturing the same.

(Prior art and its problems) Multicore flat cables are used as internal wiring wires for audio equipment, OA equipment, and the like.

Among flat cables, polyvinyl chloride (PVC)
Insulated flat cables are low cost and widely used. However, in the manufacturing process, the PvC tape (1) and conductor (2) are pasted together as shown in Figure 1.2.
Since there is no adhesive that has good adhesion to PVC and a solvent such as TIF is used, there are problems with the working environment and safety.

Also, 1) High temperature (140℃ at material temperature) is required to fuse V C.
Although pressure bonding is performed with a roll (~160°C), the melt viscosity of PvC is high, causing deformation and displacement of the conductor, resulting in poor dimensional stability.

Furthermore, as a manufacturing method, the conductors are aligned vertically and lined) (3
) Due to the method of laminating PVC tape, the number of conductor cores was limited, and there was a problem that it could not respond to changes in the number of conductors due to diversification of user requirements.

The long product manufactured as shown in FIG. 1 is cut at the slit (3) and manufactured into a product in the shape shown in FIG.

In FIG. 1, (4) is a heat roll.

(Disclosure of the Invention) The present invention has been studied and developed in order to improve these problems. The invention will now be explained in detail with reference to the exemplary drawings.

The structural feature of the flat cable according to the present invention is the third
As shown in the figure, between the pieces of PVC insulation tape (1) there is a layer of hot melt adhesive (5) with excellent adhesion to PvC and conductors.
) was established. The hot melt adhesive (5) is a hot melt polyamide resin and a saponified EVA resin (saponified ethylene vinyl acetate copolymer), either alone or in combination. Conductor (2)
is placed in the hot melt adhesive layer (5) between the PvC tapes (1).

In addition, the manufacturing feature is that instead of setting the conductors vertically as in the past, hot melt adhesive tape (5) is supplied between two PVC tapes (1) as shown in Figure 4, and the conductors are crimped. In front of the roll (6), attach the conductor (2) to the PvC tape (1)
and a hot melt adhesive tape (5), cut into a predetermined length, and bonded together using a pressure roll. (7) is the above cutting cutter. The conductors are inserted continuously at predetermined intervals. The pressure roll can be heated to a temperature suitable for the hot melt adhesive used.

In the above, the conductor (2) is inserted between the upper PVC tape (1) and the hot melt adhesive tape (5), or between the lower PVC tape (1) and the hot melt adhesive tape (5). Any of these may be used, and when the hot melt adhesive tape (5) is passed through the pressure roll, the conductor (2) is arranged in the hot melt adhesive layer.

Thereafter, the flat cable shown in FIG. 6 is obtained by cutting the tape that has been bonded and integrated using a pressure roll at right angles to its length.

Note that in the present invention, the meaning of "perpendicularly" is not necessarily strict, but means a direction across the length.

Experimental examples will be described below to assist in understanding the above-mentioned present invention.

■Plasticized PVC tape (thickness 0.2 tone, medium 50m).

Hot melt polyamide resin (Macromel)
T6240, Henkel Japan Co., Ltd. tape (thickness 0.
15 mm, width 50 m), and AWG 26 (/') tin coated wire 0.16 mm as a conductor between the polyamide resin tape and the I) V C tape at right angles to the length direction of the tape.
After inserting the conductor at a pitch interval of 5 am and cutting this conductor to a length of 60 strips, the PvC tape and hot melt polyamide resin tape were pressed together at 140℃ with a hot melt polyamide resin tape sandwiched between PVC tapes. The resin tape, conductor, and VC tape were adhered continuously.

■ Similar to ■, hot melt polyamide resin (Macromel t 6240, Henkel Japan Ltd.) and saponified EVA resin (Dumilan C-22) are placed between the PVC tapes.
80, Mitsui Polychemical Co., Ltd.) mixed at a ratio of 1:1, and AWG with 5 ugly pitches in the same way as ■.
No. 26 tin-coated wire was inserted between the PvC tape and the hot-melt adhesive tape from a direction perpendicular to the tape, and was continuously brought into close contact with a pressure roll at 140° C. to form a flat cable.

(Effect of the invention) According to the present invention as described above, there are the following advantages.

(About the product) ■ The adhesive layer uses hot melt polyamide resin, saponified EVA resin, etc., which have excellent adhesiveness to both PVC and conductors.

Therefore, the flat cable of the present invention has no misalignment between the PVC tape and the conductor, has good adhesion to the PVC tape, and has excellent dimensional stability.

(About the manufacturing method) ■ Since it is continuously molded horizontally, all you need to do is cut it to the required number of core wires. Therefore, in the flat cable manufacturing method of the present invention, the number of core wires can be set arbitrarily, so even if the number of core wires differs depending on the user, it can be easily handled.

■ Since the conductor is cut and inserted one by one from the lateral direction, the conductor reel only needs to be set one turn at a time (in the conventional method, five reels were required if the number of conductor cores was five). Therefore, in the flat cable manufacturing method of the present invention, manufacturing equipment is more compact than that of the conventional method.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional flat cable product, Figure 2
The figure is an explanatory diagram of the conventional flat cable manufacturing method.
The figure is a perspective view of the flat cable product of the present invention, and FIG. 4 is an explanatory diagram of the method of manufacturing the flat cable of the present invention. (1), -, pvc tape piece or PVc + - tape, (21
... Conductor, (3) ... Slit, (4) ... Heat roll, (5) ... Hot melt adhesive layer or hot melt adhesive tape, (6) ... Pressure 10-ru , (Ha... Katta's agent Patent attorney Masashi Yoshitake () 1 Figure, 2 Figures, 71-3 Figure 4 Figures

Claims (1)

[Scope of Claims] (1) A flat cable characterized in that a hot melt adhesive layer is provided between pieces of polyvinyl chloride tape, and a conductor is disposed in the hot melt adhesive layer between the pieces of polyvinyl chloride tape. (2) The hot melt adhesive layer is a resin layer made of hot melt polyamide resin or saponified ethylene vinyl acetate copolymer alone or in combination.
Flat cable described in section 1). (6) In manufacturing a flat cable in which a hot melt adhesive layer is provided between the polyvinyl chloride tape pieces and a conductor is placed in the hot melt adhesive layer between the polyvinyl chloride tape pieces, A hot-melt adhesive tape is interposed between the polyvinyl chloride tape and the hot-melt adhesive tape, and a conductor is inserted perpendicular to the length direction of the tape. After cutting the conductor to a predetermined length, they are bonded using a pressure roll. A method for manufacturing a flat cable characterized by continuous and close contact. (4) The method for manufacturing a flat cable according to claim (6), wherein the tape-shaped body is continuously brought into close contact with a pressure roll and then cut at right angles to the length direction. (5) The method for producing a flat cable according to claim (6), wherein the hot melt adhesive tape is a resin tape made of hot melt polyamide resin or saponified ethylene vinyl acetate copolymer alone or in combination.