JPS6147009A - Jumper wire - 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 [Industrial Application Field] The present invention relates to a jumper wire, and particularly to a jumper wire coated with a semi-rigid vinyl chloride composition having excellent damage resistance.

[Conventional technology] Jumper wires have excellent mechanical and electrical properties that can withstand long-term practical use, as well as toughness and IW resistance that can withstand harsh wiring and repair work, and removability of terminal insulators. characteristics are required. Various insulating materials are used for these, but vinyl chloride has a good balance of properties, is flame retardant, can be colored freely, is inexpensive, and has good processability. It is the most commonly used material because it has several features not found in other materials.

Jumper wires using vinyl chloride include vinyl-nylon jumper wires in which vinyl chloride is further coated with nylon, and semi-rigid vinyl jumper wires in which a semi-rigid vinyl chloride composition alone is coated.

[Problem that the invention seeks to solve]

Among these, the vinyl-nylon double insulated jumper wire has nylon applied to the outside, so it has excellent mechanical strength, especially abrasion resistance, and cut-through resistance. Manufacturing such as extrusion requires 1a 7J' 8, so a price increase is unavoidable. In addition, there is a natural limit to the recent demand for thinner wires as equipment becomes smaller and lighter.

Although semi-rigid vinyl jumper wire eliminates the drawbacks of these double-insulated jumper wires, it has inferior mechanical and thermal properties compared to nylon, so it is necessary to pull out one or several wires from a harnessed wire for wiring, etc. In some cases, the friction between the wires caused damage to the insulator, and in some cases, there were many accidents that resulted in conductor breakage.

On the other hand, in the conventionally used semi-rigid vinyl chloride compositions, a liquid plasticizer is used as a plasticizer to be added to the vinyl chloride resin, but there is a problem that mechanical strength such as tensile strength and elongation is not sufficient. be.

The present invention has been made based on the above, and by providing a coating made of a vinyl composition with extremely low frictional force, even when one or several wires are pulled out from a bundle, not only the conductor is disconnected but also the insulator is damaged. The object of the present invention is to provide a new jumper wire that can be significantly reduced in weight and has excellent mechanical strength.

[Means for solving the problems] The jumper wire of the present invention is made of polyvinyl chloride resin 100fJ
Contains not more than 50 m parts of a plasticizer with a liquid plasticizer/polymer plasticizer blending ratio in the range of 50150 to 85/15 wt%, and at least 0.2 m parts of m fatty acid monoamide based on the ffi part. The feature is that the conductor is coated with a resin composition.

[Function] In the present invention, it is preferable to use a homopolymer as the polyvinyl chloride resin, but copolymers containing 5% or less of the comonomer m, such as vinyl chloride-vinyl acetate copolymers, vinyl chloride-ethylene copolymers, etc., may also be used. good.

What is important in the present invention is that a liquid plasticizer and a polymeric plasticizer are used in combination as the plasticizer added to the polyvinyl chloride resin.

When covering jumper wires, it is important to consider not only mechanical properties and damage resistance, but also other physical properties, such as physical properties, chemical properties,
Electrical properties, workability, economic efficiency, lifespan, ease of handling, etc. will be required. The balance between these is extremely important in practical terms.

For example, while maintaining mechanical strength and abrasion resistance,
It is difficult to achieve contradictory properties using liquid plasticizers alone, such as imparting properties such as "improving workability while maintaining sufficient strength."

Although it is desirable to reduce the amount of liquid plasticizer in order to reduce volatility and migration of plasticizer, cold resistance, II impact resistance, etc. are significantly deteriorated, which poses a practical problem.

Polymeric plasticizers cover these needs, and because they are high molecular weight polymers, they do not volatilize or migrate.

In addition, polymer plasticizers are compatible with vinyl chloride, have abrasive properties,
Mechanical properties, cold resistance, impact resistance, etc. can be imparted without compromising damage resistance.

In the present invention, the blending ratio of liquid plasticizer/polymer plasticizer must be in the range of 50,150 to 85/15% by weight. If the amount of liquid plasticizer is less than 50% by weight, a sufficient plasticizing effect cannot be obtained, and if it exceeds 8511%, the mechanical strength, abrasion resistance, and damage resistance of the jumper wire will be insufficient.

Further, the total amount of the liquid plasticizer and the polymer plasticizer needs to be 50 parts by weight or less based on 100,116 parts of the polyvinyl chloride resin. If the amount exceeds 1 part of 50mff, the mechanical properties and damage resistance will be significantly deteriorated. There is no particular limitation as long as it is 501 m parts or less, but desirably 20 to 50 mf11 parts teal.

As a liquid plasticizer, di-n-octylphate,
Phthalate esters such as di-2-ethylhexyl phthalate, diisodecyl phthalate, ditridecyl phthalate, fatty acid esters such as dioctyl adipate, dioctyl adipate, dioctyl sebacate, phosphate esters such as tricresyl phosphate, epoxidized soybean oil, epoxy Epoxidized substances such as resins, adipic acid, polyesters of Sebastine, trioctyl trimellitate,
Examples include those with a molecular weight of 3000 or less, such as trimellitic acid esters such as tri-n-octyl trimellitate,
These can be used alone or in combination.

Examples of polymeric plasticizers include chlorinated polyethylene, chlorinated polyethylene-vinyl chloride graft copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl chloride graft copolymer, polyurethane, and urethane-vinyl chloride graft copolymer. polymers, nitrile-butadiene polymers, acrylonitrile-butadiene-styrene polymers, polybutadiene, chlorosulfonated polyethylene, methyl methacrylate-butadiene-styrene polymers, ethylene-vinyl acetate-acrylic acid copolymers, etc., with a molecular weight of 1
0,000 or more, and can be used alone or in combination.

In the present invention, fatty acid monoamides include erucylamide and oleylamide, both of which can reduce frictional resistance without substantially impairing the excellent properties of vinyl chloride.

This is because a thin film of fatty acid monoamide is formed on the surface of the vinyl chloride coating, and since fatty acid monoamide has low volatility, it can maintain this performance for a long period of time.

The reason why the amount of fatty acid monoamide added is set to 0.2 parts by weight or more is because if it is less than this, there is almost no effect of lowering the gi friction resistance.

The upper limit is not particularly limited, as it varies depending on the properties of the vinyl chloride used, the mixing ratio of vinyl chloride and plasticizer, etc. However, since fatty acid monoamides have an extremely large lubricating effect, adding a large amount may cause crosstalk and extrusion processability. Since this results in a significant decrease, the upper limit is considered to be around the amffi level.

In the present invention, in addition to the above-mentioned components, various stabilizers such as lead salts and organotin stabilizers, various total soaps such as stearic acid metal salts, various antioxidants such as phenolic antioxidants,
Various refueling agents such as halogens and phosphorus compounds, IN auxiliaries such as antimony trioxide and boro-zinc, fillers such as clay, calcium carbonate, and aluminum hydroxide, coloring agents, ultraviolet absorbers, and other ordinary vinyl chloride compositions. It is possible to add various ingredients used in the product.

[Example] Various properties of molded articles made from compositions based on the formulations shown on each side of Table 1 were measured.

The results are shown in the lower column of Table 1.

The characteristics were measured as follows.

(1) Tensile strength, elongation, 100% modulus: J l
Based on 5K-6723.

(2) Static g friction coefficient, dynamic friction coefficient Nibles molded 1J
Two sheets of IIX30JIIX1QO shoes are stacked together and a load of 18509 is applied at 20℃ as shown in Figure 1.
The static and dynamic friction coefficients when moving at a speed of aem/Win were determined from equations (1) and (2).

In FIG. 1, 1 is a rail, 2 is a sliding block, 31.32 is a sample sheet, 4 is a load, 5 is a motor, 6 is a load cell, and 7 is a recorder such as a chart.

Static am force (FS) Static friction coefficient (μS) - Load (W) 1-1 (1) Dynamic rIi friction force (Fk) Dynamic I&! Coefficient of friction (μk) - Load (W) (3) Damage Resistance A jumper wire with an outer diameter of 1.1 m coated on a tin-plated annealed copper wire with a diameter of 0.5 m and a thickness of 0.3 mm was used.

For the test, make a ring with a diameter of 20 cm using the sample wire as shown in Figure 2, insert one of the same sample wires into the ring, and place the 11009
The operation of applying a load and sliding was repeated, and the number of times until 8,111 bodies were exposed was determined.

In FIG. 2, 10 is a loop of the sample wire, 11 is the sample wire passed through it, and 12 is a load.

As is clear from Table 1, Examples 1 to 6 within the scope of the present invention have well-balanced characteristics.

On the other hand, in Comparative Example 1, the content m of erucylamide is less than the specified value, and in Comparative Example 2, the content m of plasticizer is more than the specified value, but in these cases, the gm coefficient and damage resistance number are inferior. .

In Comparative Example 3, the polymer plasticizer content exceeds the liquid plasticizer content m, but the mechanical properties such as tensile strength and elongation are inferior.

Comparative Example 4 does not contain a polymer plasticizer and has significantly poor elongation.

Comparative Example 5 does not contain any plasticizer, and its elongation is even worse than Comparative Example 4.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the semi-rigid vinyl chloride composition is inexpensive and has better processability, and j! i
A new well-balanced jumper wire can be obtained that can eliminate accidents such as damage to the insulation and disconnection of the reef body without impairing its properties such as being flammable and freely colorable.

[Brief explanation of the drawing]

FIGS. 1 and 2 show fff for the sample of the present invention,
FIG. 2 is an explanatory diagram showing an IIK resistance measuring device and a damage resistance test method. 31.32: Sample sheet, 10: Sample wire loop, 11:
Sample wire.

Claims (1)

[Claims] For 100 parts by weight of polyvinyl chloride resin, liquid plasticizer/
A resin composition containing 50 parts by weight or less of a polymeric plasticizer in a blending ratio of 50/50 to 85/15% by weight and at least 0.2 parts by weight of a fatty acid monoamide is coated on the circumference of the conductor. A jumper wire characterized by: