JPH06223631A - Electric wire coating material - Google Patents

Abstract

PURPOSE:To provide excellent wear resistance and flexibility for wire coating material in a thin wall condition by adding 0.5-30 pts.wt. tetrafluoroethylene resin fine powder to 100 pts.wt. polyvinyl chroride. CONSTITUTION:Wire coating material formed by adding plasticizer to polyvinyl chroride is such that 0.5-30 pts.wt. tetrafluoroethylene resin fine powder is added to 100 pts.wt. polyvinyl chroride. For example, 35 pts.wt. DIDP (di.iso.decyl.phthalate), 5 pts.wt. tribasic lead sulfate as lead group stabilizer, 3 pts.wt. acryl group resin as assistant are added to 100 pts.wt. vinyl chroride resin (a polymerization degree of 1300) and then 5 pts.wt. tetrafluoroethylene resin fine powder is added thereto to manufacture insulating resin material, with which a core is coated at a thickness of 0.2mm to form an insulation coating wire. In this way, it has a low friction coefficient and higher wear resistance in such a state that the flexibility is held by tetrafluoroethylene resin excellent in lubrication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire coating material, and more particularly to an electric wire coating material having excellent wear resistance and flexibility even in a thin state.

[0002]

2. Description of the Related Art As a material for coating electric wires, a polyvinyl chloride mixture prepared by adding a plasticizer, a stabilizer and the like to polyvinyl chloride is generally used.

In order to cope with the recent trend toward weight reduction of automobiles, home electric appliances and the like, it is desired that the electric wires used for these also have a thinner coating portion and a lighter weight. If the thickness of the coating portion is 0.3 mm or less, the required abrasion resistance cannot be obtained, and it is not suitable as a coating material for electric wires used under severe conditions such as automobiles.

For this reason, various measures have been considered in order to improve the wear resistance in a thin state, and one of them is disclosed in JP-A-3-214509 and JP-A-4-4-2.
Japanese Patent Publication No. 06312 discloses an electric wire coating material obtained by adding ultrafine particle amorphous silica or chlorinated polyethylene to the above polyvinyl chloride mixture.

However, although such an electric wire coating material is surely excellent in abrasion resistance, it is lacking in flexibility and is used for automobiles, home electric appliances, etc. in which wiring is required while bending in a narrow space. There is a problem as a coating material for electric wires used.

Therefore, an object of the present invention is to provide an electric wire coating material having excellent abrasion resistance and flexibility even in a thin state.

[0007]

In order to solve the above-mentioned problems, the present invention provides an electric wire coating material comprising a polyvinyl chloride and a plasticizer added thereto.
Fine powder of tetrafluoroethylene resin was added to 0 part by weight.
5 to 30 parts by weight is added.

The electric wire coating material constructed as described above is
The abrasion resistance is improved while maintaining the flexibility by the tetrafluoroethylene resin, which has a low friction coefficient and excellent lubricity.

The reason why the amount of the tetrafluoroethylene resin added is 0.5 to 30 parts by weight is that the abrasion resistance is not improved even if it is added more than necessary, which only leads to an increase in cost. Is.

[0010]

EXAMPLES Examples will be described below in comparison with conventional examples. (Example) As shown in Table 1, DIDP (di.iso.
Decyl phthalate) 35 parts by weight, 5 parts by weight of tribasic lead sulfate as a lead stabilizer, 3 parts by weight of acrylic resin as a processing aid, and 5 parts by weight of fine powder of tetrafluoroethylene resin. By doing so, an insulating resin material was produced, and a core wire was coated with the insulating resin material with a thickness of 0.2 mm to prepare an insulating coated electric wire.

(Conventional example) As shown in Table 1, DIDP was added to 100 parts by weight of vinyl chloride resin (polymerization degree: 1300).
An insulating resin material was manufactured by adding 35 parts by weight, 5 parts by weight of tribasic lead sulfate, and 3 parts by weight of an acrylic resin, and a core wire was coated with the insulating resin material at a thickness of 0.2 mm for insulation coating. I created an electric wire.

[0012]

[Table 1]

Abrasion resistance test was conducted on the two insulated coated electric wires by the blade reciprocating method. The blade reciprocating method is, as shown in FIG.
At a room temperature of 5 ° C., a length of about 75 fixed on the test table 11
The insulation surface of the insulation-coated electric wire 15 of 0 mm is 1 in the axial direction.
The number of reciprocations until the blade 13 comes into contact with the core wire of the insulation-coated electric wire 15 is measured over a length of 0 mm or more, and when the insulation-coated electric wire 15 is sequentially moved by 100 mm, both are rotated clockwise by 90 ° and the above measurement is repeated. It is a thing.

This measurement is performed four times on the same sample, and the minimum value is taken as the abrasion resistance.

As shown in Table 1, the above test results are 550 times in the example and 250 times in the conventional example, and it is understood that the example has improved abrasion resistance as compared with the conventional example. .

Further, the flexibility was compared,
No particular difference was observed.

[0017]

As described above, according to the present invention, since a tetrafluoroethylene resin having a low wear coefficient and excellent lubricity is added to the polyvinyl chloride mixture which is a conventional electric wire coating material, even in a thin state. It becomes a wire coating material with excellent abrasion resistance and flexibility, and can be used to reduce the thickness and weight of coated wires used in automobiles and home appliances.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a blade reciprocating test machine.

[Explanation of symbols]

 11 Test Table 12 Reciprocating Drive Tester 13 Blade 14 Weight 15 Insulated Wire

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Claims (1)

[Claims] 1. An electric wire coating material obtained by adding a plasticizer to polyvinyl chloride, wherein 0.5 to 30 parts by weight of fine powder of tetrafluoroethylene resin is added to 100 parts by weight of polyvinyl chloride. An electric wire coating material characterized by: