JPH05201462A - Electric wire binding tape - Google Patents

Abstract

PURPOSE:To provide an electric wire binding tape with manually breakable property, fire retardancy, self-extinguishing property, flexibility and insulation property which is harmless and does not generate a harmful gas even when it is burnt. CONSTITUTION:The title electric wire binding tape is formed by blending magnesium hydroxide 100-150 pts.wt. to a copolymer 100 pts.wt. consisting of ethyl acrylate 10-30wt.% and polyethylene 70-90%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire binding tape, and more particularly to an electric wire binding tape which is easily cut by hand and does not generate toxic or toxic gas.

[0002]

2. Description of the Related Art Conventionally, as a tape for binding an electric wire of this type, it is wound around an electric wire by hand, and the tape is cut by a human hand. This tape cutting process is currently performed by automated machines in some factories, but most of them are still done by humans, not scissors or cutters. Therefore, the electric wire bundling tape used as an electric wire bundling tape or the like has a very important performance of being hand-cuttable (easy to cut by hand). This hand-cutting property is determined by elongation at break and breaking strength, and is generally 1
It is said that an electric wire binding tape having a degree of expansion and contraction within the range of 100 to 400% has good hand tearability. In addition, the wire binding tape must have flame resistance (self-extinguishing), flexibility, and electric resistance in addition to hand-cutting properties.

And, as the electric wire binding tape,
A material containing polyvinyl chloride as a main raw material as disclosed in JP-A-3-229744 is disclosed.

[0004]

However, the polyvinyl chloride has a problem that a toxic gas is generated at the time of combustion, and this problem is particularly related to the global environmental problem which has recently become a global problem. This is an issue that cannot be escaped from the problem of "detoxifying plastics".

On the other hand, a synthetic resin composition which does not generate toxic gas during combustion is disclosed in Japanese Patent Publication No. 57-10898. However, even if the resin is used, a wire binding tape that satisfies the above-mentioned hand-cutting property has not been formed.

The object of the present invention was invented in order to solve the above-mentioned drawbacks of the conventional products, and has the above-mentioned conventional performances (hand-cutability, flame retardancy, self-extinguishing property, flexibility, and electric resistance). The present invention provides a tape for binding electric wires, which has the property of being nontoxic and does not generate toxic gas even when burned.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and comprises 10 to 30% by weight of ethyl acrylate.
And 100 to 150 parts by weight of magnesium hydroxide with respect to 100 parts by weight of a copolymer of 70 to 90% by weight of ethylene.

Magnesium hydroxide in the present invention is blended in order to improve both the self-extinguishing property and the dimensional stability of the copolymer of ethyl acrylate and ethylene.
Here, the self-extinguishing property refers to a property that the fire is naturally extinguished after the target material is ignited. Copolymer 100 consisting of ethyl acrylate of magnesium hydroxide and ethylene
If the compounding ratio with respect to parts by weight is less than 100 parts by weight, the self-extinguishing property and dimensional stability cannot be achieved, and if it exceeds 150 parts by weight, the composition becomes too hard and moldability becomes difficult.
It is preferably within the range of 50 parts by weight. If the elongation at break determined by the compounding ratio is too small, the fit feeling when bound as a tape will be poor, and if it is too large, the hand-cutting property will be deteriorated. Is preferred.

In addition to the above magnesium hydroxide, there are calcium carbonate composites and the like as dimensional stability. However, considering the compatibility with ethylene, magnesium hydroxide is the most preferable as an additive for enhancing self-extinguishing property.

Further, not only is the magnesium hydroxide alone used as an additive for enhancing the self-extinguishing property,
It goes without saying that a synergistic effect can be achieved by using other additives together. Examples of the additive include non-halogenated phosphoric acid ester, antimony trioxide, antimonate barium metaborate, zinc borate, borax, zirconium oxide, and aluminum hydroxide. Incidentally, the wire binding tape according to the present invention contains a neutralizing agent, an antioxidant or a pigment, other inorganic fillers,
Of course, an organic filler may be used as appropriate.

Further, although the present invention is limited to the electric wire binding tape, it goes without saying that the adhesive tape can be formed by applying an adhesive, and thus the electric insulating tape can be formed. That is.

[0012]

The present invention mixes magnesium hydroxide with a copolymer consisting of ethyl acrylate and ethylene and forms it into a tape to obtain conventional performance (hand-cutability, flame retardancy, self-extinguishing property, softness). It is possible to obtain an electric wire binding tape which has a good electrical property and electric resistance and is non-toxic and does not generate a toxic gas even when burned.

[0013]

EXAMPLES Examples of the present invention will be described in detail below. The electric wire binding tape of this example is a copolymer 1 containing 20% by weight of ethyl acrylate and 80% by weight of ethylene.
It is a mixture of 100 parts by weight of magnesium hydroxide and 110 parts by weight of magnesium hydroxide and 3 parts by weight of red phosphorus.

As Comparative Examples, Comparative Example 1 in which 110 parts by weight of magnesium hydroxide was added to a copolymer of 20 parts by weight of ethyl acrylate and 80% by weight of ethylene in a total amount of 100 parts by weight, and a conventional product (PVC harness tape). Table 1 shows the results of measurement of physical properties of). Further, all test samples have a width of 19 mm. The variation in the thickness of the sample is within the accuracy (0.13 ± 0.03 (mm)).

[0015]

[Table 1]

From the above results, the electric wire binding tape according to this example has an elongation at break within the optimum range, and the elongation at break of the comparative example containing no red phosphorus is outside the range. Met. Although the strength is slightly weaker than other comparative examples, there is no problem if it is 2.0 kgf or more because it can be sufficiently used as a tape for electrical insulation or a wire binding.

Further, the electric wire binding tape of this embodiment is
When a combustion test was conducted using the CS No. 53 "low vinyl chloride sheath" test method, it was 1.5 mg / g or less together with the comparative example. Therefore, it has been proved that there is no problem in terms of preventing generation of toxic gas during combustion.

Table 2 shows the results of a comparative inspection of the performances of the electric wire binding tape having a different base material from this embodiment.

[0019]

[Table 2]

As is apparent from this table, the electric wire binding tape based on OPP, polyester (flame retardant), cellophane, and polyethylene is used for electrical insulation or electric wire binding tape. Since it does not satisfy any of the self-extinguishing property, the non-halogen property, the flexibility, and the hand-cutting property, the evaluation is judged as impossible. On the other hand, the wire binding tape of this example had other necessary performances except that the whitening performance was low. Although not shown in the table, the wire binding tape of this example also had self-extinguishing property and electric resistance.

In this embodiment, 110 parts by weight of magnesium hydroxide and 3 parts by weight of red phosphorus are mixed with 100 parts by weight of the total amount of ethyl acrylate and ethylene, and 3 parts by weight of red phosphorus is added to the wire binding tape. As a result, a nontoxic wire binding tape having a strength of 2.26 kgf and an elongation at break of 317% can be formed. As a result, a wire binding tape that requires performance such as hand tearability and self-extinguishing property is formed. It has the effect of detoxifying.

[0022]

According to the present invention, for binding electric wires,
Ethyl acrylate 10-30% by weight and ethylene 70-
100 to 150 parts by weight of magnesium hydroxide is mixed with 100 parts by weight of a copolymer composed of 90% by weight, which has the effect of being non-toxic and producing no toxic gas even when burned, Furthermore, hand-cutability, flame retardance,
It has the effects of self-extinguishing property, flexibility, and electric resistance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Uchida 2-13-1, Tai, Kamakura-shi, Kanagawa Toyo Kagaku Co., Ltd.

Claims (1)

[Claims] 1. An electric wire binder comprising 100 to 150 parts by weight of magnesium hydroxide mixed with 100 parts by weight of a copolymer consisting of 10 to 30% by weight of ethyl acrylate and 70 to 90% by weight of ethylene. tape.