CN105637596B

CN105637596B - Cable

Info

Publication number: CN105637596B
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: 2017-05-24
Anticipated expiration: 2034-09-10
Also published as: JP2015056236A; WO2015037602A1; CN105637596A; JP6179289B2; MX349094B; MX2016001015A; DE112014004143T5

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 of the insulated electric conductors for twisting together mutually.

Background technology

As halogen-free flame-retardant cable, it is known that set in the outer layer of the multicore twisted wire for twisting together plural insulated electric conductor Clad, and the clad internal layer by ethylene-vinyl acetate copolymer (EVA) or vinyl alpha olefin copolymer structure While composition thermoplastic polyurethane etc. into, outer layer, the cable (for example, referring to patent document 1) of crosslinking Treatment is carried out.

Prior art literature

Patent document

Patent document 1：Japanese Patent Publication 2012-028123 publications

The content of the invention

Problems to be solved by the invention

In such cable, it is desirable to reduce the so-called line addiction for turning into the state for keeping bending in the case of bending cable (Line addictions).

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

Solution to problem

Cable of the invention has：

A pair of the insulated electric conductors for twisting together mutually,

The inside clad formed by non-crosslinked polyurethane around the pair of insulated electric conductor is coated, and

The outside clad formed by non-crosslinked polyurethane around the cladding internal clad, wherein

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

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

Effect of the invention

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

Brief Description Of Drawings

[Fig. 1] is a sectional view for example of the multicore cable for showing embodiment of the invention.

[Fig. 2] is the figure of the bending evaluation method of the multicore cable for showing Fig. 1.

Specific embodiment

[explanation of the embodiment of the present application]

The content for listing the embodiment of the present application first is illustrated.

The multicore cable of the embodiment according to the present application

(1) with a pair of the insulated electric conductors for twisting together mutually,

The hardness of the outside clad is calculated as less than more than 80 degree 90 degree and than the internal bag with Xiao A hardness The hardness of coating is small 5 degree~and 10 degree.

Internal clad and outside clad are formed by non-crosslinked polyurethane, therefore without the need for the processing charges of crosslinking, by This can realize cost degradation.In addition, the Xiao A hardness of internal clad and outside clad is for if above range, cable It is difficult to after bending with wired addiction, and processability and operability are excellent.

(2) preferably the pair of insulated electric conductor each has the insulator of conductor and the cladding conductor, wherein described exhausted Edge body is made up of crosslinked polyethylene.

Because the insulator of insulated electric conductor have passed through crosslinking Treatment, therefore the heat resistance of insulated electric conductor can be maintained.

In order to realize being difficult to the cable of the excellent in workability with wired addiction, following scope is preferably met.

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

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

[detailed description of the embodiment of the present application]

Hereinafter, with reference to the accompanying drawings of the example of cable of the invention.

As shown in figure 1, the cable 10 according to the present embodiment accommodates two one group of insulated electric conductor 11.Insulated electric conductor 11 Between constituted in the so-called pair twist mode for twisting together mutually.

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

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

In addition, as the material of now insulator 13, preferably using flame-proof polyethylene.The external diameter of insulator 13 is for (for example) 1.4mm.To such irradiating electron beam of insulated electric conductor 11 for constituting carrying out crosslinking Treatment.It should be noted that insulator 13 Can be formed by the resin of fire retardant polyolefin class.

Coated by internal clad 21 around a pair of insulated electric conductors 11 of pair twist.Internal clad 21 is by uncrosslinked The non-crosslinked polyurethane of reason is constituted.The inside clad 21 has the function of the out of roundness on the cross section for improving cable 10.

Coated by outside clad 22 around internal clad 21.Outside clad 22 by uncrosslinked treatment non-friendship Connection polyurethane is constituted.Thus, outside clad 22 can obtain excellent with the mold materials PBT or nylon for constituting various machines etc. Different heat sealability.

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

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

For example, as cable 10, it is also possible to which the sectional area for using the conductor 12 of each insulated electric conductor 11 is 0.3mm², insulator 13 external diameter is the cable of 1.7mm.Now, the external diameter of internal clad 21 is 4.4mm, and the external diameter of outside clad is 5.0mm. In addition, as cable 10, it is also possible to which the sectional area for using the conductor 12 of each insulated electric conductor 11 is 0.5mm², insulator 13 external diameter It is the cable of 2.0mm.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 the thickness size on insulator 13, internal clad 21 and outside clad 22, in conductor 12 sectional area (external diameter) is determined in the case of determining by electrical characteristics and mechanical property.For example, the section of the conductor 12 of cable 10 Product is in 0.25mm²~0.5mm²In the range of when, the thickness of outside clad 22 can be in the range of 0.2~0.6mm, so that electric Cable is difficult to 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 less than more than 90 degree 100 degree, particularly preferably 95 degree.In addition, The hardness (Xiao A hardness) of outside clad 22 is less than more than 80 degree 90 degree, particularly preferably 85 degree.That is, outside is coated The Xiao A hardness of layer 22 is set as smaller than the Xiao A hardness of internal clad 21 5 degree~10 degree.

During the cable 10 of the present embodiment that manufacture is so constituted, first, a pair of insulated electric conductors of pair twist 11.Then, right Internal clad 21 is formed around a pair of the insulated electric conductors 11 for twisting, and further internally the periphery of clad 21 forms outer Portion's clad 22.

As described above, the cable 10 according to the present embodiment, due to internal clad 21 and outside clad 22 are made up of non-crosslinked polyurethane, therefore without the need for the processing charges of crosslinking Treatment, it is possible to achieve cost degradation.In addition, passing through The hardness of internal clad 21 is set to less than more than 90 degree 100 degree with Shore A durometer, and by the hardness of outside clad 22 Less than more than 80 degree 90 degree are set to Shore A durometer and while be set to 5 degree~10 degree smaller than the hardness of internal clad 21 Value, thus makes the line addiction reduction after bending of cable 10, and can provide processability and the excellent cable 10 of operability.

In addition, the cable 10 according to the present embodiment, because the insulator 13 of insulated electric conductor 11 is made up of crosslinked polyethylene, Even if therefore internal clad 21 and the non-crosslinked treatment of outside clad 22, also can fully keep the heat-resisting of insulated electric conductor 11 Property.

In addition, the cable 10 according to the present embodiment, because 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 0.2~0.6 mm, therefore can fully be reduced the effect of line addiction.

Embodiment

(embodiment)

The cable of the present embodiment formed by non-crosslinked flame retardant polyurethane using internal clad and outside clad is entered 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, the cable that will cut into 150mm length passes through in the state of radius of curvature is bent for 10mm with U-shaped The fixed cable two ends such as adhesive tape, and kept for 24 hours.Thereafter, releases cable, and the cable that played in the state of fixed one end, survey Determine by the displacement D (mm) (reference picture 2) after 24 hours.Displacement D is set to line addiction evaluation in the situation of below 50mm Pass the test.

(comparative example)

As comparative example, formed by non-crosslinked flame retardant polyurethane using internal clad and outside clad and internal bag The cable that the hardness of coating is 85 degree, the hardness of outside clad is 95 degree or 80 degree is carried out and embodiment identical line addiction evaluation Experiment.

The result of above-mentioned line addiction evaluation test shows in table 1.

[table 1]

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

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

The present invention is described in detail above by reference to specific embodiment, those skilled in the art should be understood that can To carry out various changes and modifications without departing from the spirit and scope of the present invention.Additionally, the constituting portion of described above Quantity, position, shape of part etc. are not limited to the scheme of above-mentioned implementation, and it is appropriate to be changed on the basis of implementation is of the invention Quantity, position, shape etc..

The radical of insulated electric conductor 11 and configuration are not limited to the present embodiment in the cable 10 of the embodiment above.Can also It is that cable is contained within more than the two pairs structures of insulated electric conductor.

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

The explanation of reference

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 kind of cable, has：

A pair of the insulated electric conductors for twisting together mutually,

The inside clad formed by non-crosslinked polyurethane around the closely sealed the pair of insulated electric conductor of cladding, and

The outside clad formed by non-crosslinked polyurethane around the closely sealed cladding internal clad, wherein

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

2. cable according to claim 1, wherein, the pair of insulated electric conductor each has conductor and the cladding conductor Insulator, wherein

The insulator is made up of crosslinked polyethylene.

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

4. cable as claimed in any of claims 1 to 3, wherein, the thickness of the outside clad for 0.2mm with Upper below 0.6mm.