JPH08199127A - Tape for knotting cable - Google Patents

Abstract

PURPOSE: To prepare an adhesive tape for knotting a flat cable obtained by parallel arranging many cables obtained by insulating and coating electric wires with polyvinyl chloride, etc., side by side. CONSTITUTION: This tape is prepared by providing an adhesive layer having >=100kg/cm<2> tensile modulus on one side of an insulating substrate and is capable of firmly knotting cables at a relative low temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive tape used for binding cables.

[0002]

2. Description of the Related Art With the spread of OA equipment and the development of LAN, a multi-core cable called "flat cable" has been widely used.

As one kind of such flat cable,
There is a structure in which a number of cables in which electric wires are insulated and coated with polyvinyl chloride or polyethylene are arranged in parallel. In this flat cable, the insulation coatings are heat-sealed to bind the cables arranged in parallel to each other. The heat fusion between the insulating coatings may be performed over the entire length of the cable or may be partially performed at a predetermined portion of the cable.

[0004]

However, in the above-mentioned conventional binding method, the insulation coating of the cable may be deformed due to high temperature heating at the time of heat fusion, and the binding state is unraveled due to insufficient fusion. It was sometimes lost. Therefore, it is an object of the present invention to provide an adhesive tape that can firmly bind cables together at a relatively low temperature.

[0005]

The cable tying tape according to the present invention has a tensile elastic modulus of 100 k on one surface of an insulating base material.
An adhesive layer having a g / cm ² or more is provided.

The insulating base material of the tying tape according to the present invention can be used without any particular limitation as long as it has electrical insulation properties, but considering strength and the like, polyethylene terephthalate (hereinafter referred to as PET) and polybutylene. Those made of polyester such as terephthalate, polyimide, polyether sulfone, polyether ether ketone, polyphenylene sulfide, polyarylate, polyvinyl chloride, polyethylene and the like are preferable.

An adhesive layer is provided on one surface of the insulating base material, and the adhesive must have a tensile elastic modulus of 100 kg / cm ² or more. Tensile modulus of the adhesive is 100k
If it is less than g / cm ² , the cable binding effect is not as high as expected, and there is a concern that the binding may be unraveled. In addition,
The upper limit of the tensile elastic modulus of the adhesive is not particularly limited, but is usually 30,000 kg / cm ² . The tensile elastic modulus of the adhesive can be measured by the method specified in JIS K 7113 (measurement temperature is 25 ° C.).

Specific examples of the adhesive having the above-mentioned tensile modulus of elasticity include hot-melt adhesives containing polyethylene, polypropylene, polyvinyl chloride, polyurethane, polyamide or the like as a main component. This adhesive may be a mixture of an appropriate amount of additives such as an antioxidant, a filler, a tackifier, a flame retardant, a crosslinking agent and a pigment. The tensile modulus of elasticity of this adhesive may vary depending on the type of resin as the main component, the degree of polymerization thereof, the type and amount of additives, and the like.

When a colored binding tape is desired, the insulating base material or the adhesive layer may be colored, or a colored layer may be provided on one side or both sides of the insulating base material.

To bundle cables using the tape according to the present invention, for example, as shown in FIG. 1, a predetermined number of cables in which an insulating coating 2 made of polyvinyl chloride, polyethylene or the like is provided on an electric wire 1 are made parallel to each other. Side by side, the tying tape 3 is placed at the predetermined position, and then the tape 3 is heated and pressed,
The adhesive may be melted and fused to the insulating coating 2. In this example, the cables are partially bundled at the predetermined locations, but it is also possible to bundle the cables over the entire length by using a long tape.

Further, as shown in FIG. 2, a predetermined number of cables are arranged in parallel, and binding tapes 3 and 4 are arranged above and below the predetermined places respectively, and then these tapes 3 and 4 are heated and pressed to bond them. The agent layer may be melted and fused to the insulating coating 2. Even in the case of bundling the cables with two bundling tapes as in this example, both the mode of partially bundling using the short tape and the mode of bundling over the entire length using the long tape Can be adopted.

[0012]

The present invention will be described in more detail with reference to the following examples.

EXAMPLE Polyolefin (trade name: Bondyne AX8060, manufactured by Sumika CDF Chemical Co., Ltd.) was extruded at a temperature of 150 ° C. by a T-die extruder to obtain a film adhesive having a thickness of 30 μm. The tensile modulus of elasticity of this adhesive was measured by the method specified in JIS K 7113 (measurement temperature was 25 ° C.) to give 700.
It was kg / cm ² .

This film-like adhesive is coated with P having a thickness of 25 μm.
The ET film was overlaid on one side and heated and pressed under the conditions of a temperature of 140 ° C. and a pressure of 5 kg / cm ² for 5 minutes to obtain a binding tape having a hot melt adhesive layer formed thereon.

Twenty-four cables (thickness: 1 mm, width: 2 mm) in which a polyethylene insulation coating is provided on an electric wire having a diameter of 0.2 mm are arranged in parallel, the above binding tape is arranged, and the temperature is 130 ° C. and the pressure is 1 kg / The same flat cable as shown in FIG. 1 was obtained by heating and pressurizing for 1 minute under the condition of cm ² .

This flat cable is fixed to a stainless steel plate (thickness: 2 mm), and each cable is 100 m in speed.
When peeled at m / min and a peel angle of 180 °, the peel force was 270 g / line. Moreover, even when the binding portion was looked at by the hand, the binding portion was not unraveled. From these facts, it can be seen that the binding force of the binding tape to the insulating coating is sufficient.

Comparative Example When the same operation as in Example was carried out except that the binding tape was not used, the caiples were not fused to each other. To fuse this, the temperature had to be 160 ° C. or higher. However, the high-temperature heating partially deformed the polyethylene insulating coating. Further, when the fused portion was looked at after the heat fusion, the binding was broken.

[0018]

The present invention is configured as described above,
Since the cable can be fused to the insulating coating of the cable at a relatively low temperature, there is an advantage that the coating is not deformed and the adhesive force to the insulating coating is large.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a flat cable in which a tying tape according to the present invention is heat-sealed to an insulating coating and bound.

FIG. 2 is a front view showing an example of a flat cable in which the tying tape according to the present invention is heat-sealed to the insulating coating and bound.

[Explanation of symbols]

 1 Electric wire 2 Insulation coating 3 Bundling tape 4 Bundling tape

Claims (1)

[Claims] 1. A tensile elastic modulus of 100 k on one surface of an insulating base material.
A cable tying tape provided with an adhesive layer of g / cm ² or more.