CN105637596A

CN105637596A - Cable

Info

Publication number: CN105637596A
Application number: CN201480041983.1A
Authority: CN
Inventors: 小堀孝哉; 越智祐司; 桥本智
Original assignee: Sumitomo Electric Industries Ltd
Current assignee: Sumitomo Electric Industries Ltd
Priority date: 2013-09-10
Filing date: 2014-09-10
Publication date: 2016-06-01
Anticipated expiration: 2034-09-10
Also published as: MX349094B; WO2015037602A1; MX2016001015A; DE112014004143T5; JP2015056236A; CN105637596B; JP6179289B2

Abstract

This invention provides a cable that, while being more resistant to kinking, can be manufactured at low cost. Said cable (10) comprises a twisted pair of insulated wires (11), an inner jacket layer (21) that comprises a non-crosslinked polyurethane and surrounds the insulated wires (11), and an outer jacket layer (22) that also comprises a non-crosslinked polyurethane and surrounds the inner jacket layer (21). The Shore A hardness of the inner jacket layer (21) is between 90 and 100, inclusive. The Shore A hardness of the outer jacket layer (22) is between 80 and 90, inclusive, and is 5 to 10 durometer lower than that of the inner jacket layer (21).

Description

Cable

Technical field

The present invention relates to the cable with a pair insulated electric conductor twisted together mutually.

Background technology

As halogen-free flame-retardant cable, the known outer layer at the multicore twisted wire twisted together by plural number insulated electric conductor arranges clad, and it is made up of ethylene-vinyl acetate copolymer (EVA) or vinyl alpha olefin copolymer at the internal layer of this clad, while outer layer is made up of thermoplastic polyurethane etc., carry out the cable (for example, referring to patent documentation 1) of crosslinking Treatment.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Patent Publication 2012-028123 publication

Summary of the invention

The problem that invention to solve

In such cable, it is desirable to reduce the so-called line addiction (addiction) becoming the state keeping bending when bending cable.

It is an object of the invention to provide the cable being difficult to wired addiction.

The scheme of solution problem

The cable of the present invention has:

A pair insulated electric conductor twisted together mutually,

It is coated with the inside clad formed by non-crosslinked polyurethane of the surrounding of the pair of insulated electric conductor, and

It is coated with the outside clad formed by non-crosslinked polyurethane of the surrounding of described internal clad, wherein

The hardness of described internal clad is calculated as more than 90 degree less than 100 degree with Xiao A hardness,

The hardness of described outside clad is calculated as more than 80 degree less than 90 degree and less 5 degree to 10 degree than the hardness of described internal clad with Xiao A hardness.

The effect of the present invention

According to the present invention it is possible to provide the cable being difficult to wired addiction.

Brief Description Of Drawings

[Fig. 1] is the sectional view of the example illustrating the multicore cable according to embodiment of the present invention.

[Fig. 2] is the figure of the bending evaluation methodology of the multicore cable illustrating Fig. 1.

Detailed description of the invention

[explanation of the embodiment of the present application]

The content of the embodiment first listing the present application illustrates.

The multicore cable of the embodiment according to the present application

(1) there is a pair insulated electric conductor twisted together mutually,

The hardness of described outside clad is calculated as more than 80 degree less than 90 degree and less 5 degree than the hardness of clad inside described��10 degree with Xiao A hardness.

Internal clad and outside clad are formed by non-crosslinked polyurethane, therefore without being used for the processing charges cross-linked, thus can realize cost degradation. It addition, the Xiao A hardness of internal clad and outside clad is above-mentioned scope, after cable bend, be difficult to be with wired addiction, and processability and operability excellent.

(2) preferred the pair of insulated electric conductor each has conductor and is coated with the insulator of described conductor, and wherein said insulator is made up of crosslinked polyethylene.

Owing to the insulator of insulated electric conductor have passed through crosslinking Treatment, the thermostability of insulated electric conductor therefore can be maintained.

In order to realize being difficult to the cable of the excellent in workability with wired addiction, it is preferable that meet following scope.

(3) sectional area of described conductor is 0.25mm²Above 0.5mm²Below.

(4) thickness of described outside clad is more than 0.2mm below 0.6mm

[detailed description of the embodiment of the present application]

Example hereinafter, with reference to the accompanying drawings of the cable according to the present invention.

As it is shown in figure 1, accommodate the insulated electric conductor 11 of two one group according to the cable 10 of the present embodiment. Constituted in the so-called pair twist mode twisted together mutually between insulated electric conductor 11.

Insulated electric conductor 11 is the electric wire that any conductor 12 is coated with by insulator 13.

The further 3 strand twisted wires twisted together of twisted wire that the copper alloy wire of 16 external diameter 0.08mm is twisted together by the conductor 12 of insulated electric conductor 11 by (such as) are formed. The external diameter of conductor 12 is (such as) 0.82mm. Now the sectional area of conductor 12 is 0.25mm²��

It addition, as the material of now insulator 13, it is preferred to use flame-proof polyethylene. The external diameter of insulator 13 is (such as) 1.4mm. To insulated electric conductor 11 irradiating electron beam so constituted to carry out crosslinking Treatment. It should be noted that insulator 13 can also by the resin formation of fire retardant polyolefin class.

The surrounding of a pair insulated electric conductor 11 of pair twist is coated with by internal clad 21. Internal clad 21 is made up of the non-crosslinked polyurethane of uncrosslinked process. This inside clad 21 has the function of the out of roundness on the cross section improving cable 10.

The surrounding of internal clad 21 is coated with by outside clad 22. Outside clad 22 is made up of the non-crosslinked polyurethane of uncrosslinked process. Thus, outside clad 22 can obtain and the excellent heat weldability of the mold materials PBT or nylon that constitute various machines etc.

As constituting internal clad 21 and the non-crosslinked polyurethane of outside clad 22, it is possible to for block copolymer. Block copolymer is using polyurethane portion as hard segment, constituted using amorphous polymer as soft chain segment. Polyurethane portion is made up of glycol such as diisocyanate and ethylene glycol such as MDI or TDI. As amorphous polymer, it is possible to use polyethers, polyester, Merlon etc. As amorphous polymer, can the non-crosslinked polyurethane of particularly suitable polyethers from the viewpoint of flexibility, hydrolytic resistance, low-temperature bending performance etc.

The external diameter of internal clad 21 is (such as) 3.4mm, and the external diameter of outside clad 22 is (such as) 4.0mm.

Such as, as cable 10, it is possible to use the sectional area of the conductor 12 of each insulated electric conductor 11 is 0.3mm², insulator 13 the cable that external diameter is 1.7mm. Now, the external diameter of internal clad 21 is 4.4mm, and the external diameter of outside clad is 5.0mm. It addition, as cable 10, it is possible to use the sectional area of the conductor 12 of each insulated electric conductor 11 is 0.5mm², insulator 13 the cable that external diameter is 2.0m. Now, the external diameter of internal clad 21 is 4.6mm, and the external diameter of outside clad is 6.2mm.

It should be noted that about the thickness size of insulator 13, internal clad 21 and outside clad 22, determine by electrical characteristics and mechanical property when the sectional area (external diameter) of conductor 12 is determined. Such as, the sectional area of the conductor 12 of cable 10 is at 0.25mm²��0.5mm²Time in scope, the thickness of outside clad 22 can in the scope of 0.2��0.6mm so that cable is difficult to be with wired addiction. The thickness of outside clad 22 is preferably (such as) more than 0.3mm.

The hardness (Xiao A hardness) of internal clad 21 is more than 90 degree less than 100 degree, it is particularly preferred to be 95 degree. It addition, the hardness (Xiao A hardness) of outside clad 22 is more than 80 degree less than 90 degree, it is particularly preferred to be 85 degree. That is, the Xiao A hardness of outside clad 22 is set as less than the Xiao A hardness of internal clad 21 5 degree��10 degree.

When manufacturing the cable 10 of the present embodiment so constituted, first, a pair insulated electric conductor of pair twist 11. Then, the internal clad 21 of formation around a pair insulated electric conductor 11 of pair twist, and form outside clad 22 in the periphery of internal clad 21 further.

As described above, the cable 10 according to the present embodiment, owing to internal clad 21 and outside clad 22 are made up of non-crosslinked polyurethane, therefore without the processing charges for crosslinking Treatment, it is possible to achieve cost degradation. Additionally, by the hardness of internal clad 21 is set to more than 90 degree less than 100 degree with Shore A durometer, and the hardness of outside clad 22 is set to more than 80 degree less than 90 degree with Shore A durometer and is set to less than the hardness of the internal clad 21 5 degree��value of 10 degree simultaneously, thus make the line addiction after cable 10 bending reduce, and processability and the cable 10 of operability excellence can be provided.

It addition, the cable 10 according to the present embodiment, owing to the insulator 13 of insulated electric conductor 11 is made up of crosslinked polyethylene, even if therefore internal clad 21 and outside clad 22 Non-crosslinked process, also can fully keep the thermostability of insulated electric conductor 11.

It addition, the cable 10 according to the present embodiment, owing to the sectional area of the conductor 12 of insulated electric conductor 11 is 0.25mm²��0.5mm², and the thickness of outside clad 22 is 0.2��0.6mm, therefore can fully be reduced the effect of line addiction.

Embodiment

(embodiment)

The cable using the present embodiment that internal clad and outside clad formed by non-crosslinked flame retardant polyurethane carries out line addiction evaluation test. The hardness of internal clad is set to 90 degree��100 degree, and the hardness of outside clad is set to 80 degree��90 degree.

First, by cut into the cable of 150mm length when radius of curvature be 10mm when bending with U-shaped by fixing cable two ends such as adhesive tapes, and keep 24 hours. Thereafter, releases cable, and the cable that plays when fixing one end, measure the displacement D (mm) after 24 hours (with reference to Fig. 2). This displacement D is set to line addiction evaluation test in the situation of below 50mm qualified.

(comparative example)

As comparative example, use internal clad and outside clad to be formed by non-crosslinked flame retardant polyurethane and the hardness of inside clad be 85 degree, the cable that hardness is 95 degree or 80 degree of outside clad carry out the line addiction evaluation test identical with embodiment.

The result of above-mentioned line addiction evaluation test illustrates in Table 1.

[table 1]

As shown in table 1, being made up of the non-crosslinked polyurethane without crosslinking Treatment in the embodiment 1��5 of internal clad and outside clad, line addiction is permissible value. On the other hand, the hardness of internal clad is that in the comparative example that hardness is 95 degree or 80 degree 1,2 of 85 degree and outside clad, displacement D becomes greatly compared with embodiment, it is impossible to realize the reduction of line addiction.

From the above, it was confirmed that the hardness with the inside clad that formed by non-crosslinked polyurethane and outside clad, internal clad be 90 degree��100 degree, the hardness of outside clad be the hardness of hardness ratio inside clad of 80 degree��90 degree and outside clad little 5 degree��embodiment of 10 degree obtains sufficient line addiction reducing effect.

Above by reference to specific embodiment, the present invention being described in detail, those skilled in the art are it will be appreciated that carry out various changes and modifications without departing from the spirit and scope of the present invention. Additionally, the quantity of the component parts of described above, position, shape etc. are not limited to the scheme of above-mentioned enforcement, implementing the basis of the present invention can be changed to suitable quantity, position, shape etc.

In the cable 10 of the embodiment above, the radical of insulated electric conductor 11 and configuration are not limited to the present embodiment. It can also be the cable structure that is contained within more than two pairs insulated electric conductors.

The application is based on the Japanese patent application (Patent 2013-187616) of JIUYUE in 2013 submission on the 10th, and its content is hereby incorporated herein by.

The explanation of accompanying drawing labelling

10: cable

11: insulated electric conductor

12: conductor

13: insulator

21: internal clad

22: outside clad

R: radius of curvature

D: displacement

Claims

1. a cable, has:

A pair insulated electric conductor twisted together mutually,

2. cable according to claim 1, wherein, the pair of insulated electric conductor each has conductor and is coated with the insulator of described conductor, wherein

Described insulator is made up of crosslinked polyethylene.

3. cable according to claim 2, wherein, the sectional area of described conductor is 0.25mm²Above 0.5mm²Below.

4. cable as claimed in any of claims 1 to 3, wherein, the thickness of described outside clad is more than 0.2mm below 0.6mm.