JPS6155808A - Wire and cable for audio - 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 [Field of Industrial Application] The present invention relates to audio wires and cables.

[Prior Art] In recent years, it has been discovered that there is a very close relationship between the Fru of audio systems such as stereo and public address, and the materials and structures of the electric wires and cables used therein, and the present inventors have He contributed greatly to improvements in sound quality through his inventions.

Taking the Nirepo and VIIλ Pos Areo System as an example from recent research, the cartridge, via the amplifier, and the voice coil of the speaker are connected in series with a very long couple of wires. 20 for
When the entertainment signal up to K I- (up to z) flows alternately through those conductors, minute vibrations occur inside each conductor of the 0++ and θ phases and between the )9 off-phase 7.7, resulting in a loss of 1q. It is known that this leads to electrical non-linearity such as distortion, thereby degrading the sound quality.

It has been empirically recognized that deterioration in sound quality occurs not only due to such self-generated vibrations, but also due to vibrations applied to electric wires and cables from the outside.

The inventors have already proposed a method for reducing such vibration transmission strain between insulated wire cores (phase-to-phase) or external vibration by coating with an elastic memory material. There was no effective means to deal with resonance distortion due to propagation.

C Problem to be solved by the invention J This is because the insulating material and sheath material of electric wires and cables are generally made of polyethylene, butyl rubber, Jn-vinyl vinyl, etc., which affect the binding properties of the wires and cables. This is because it does not have the same vibration damping effect.

The present invention has been made based on the above, and can reduce resonance distortion caused by propagation of vibrations between insulated wire cores or external vibrations.
Audio wires that can demonstrate excellent training effects.
The purpose is to provide cables.

Means for Solving Problems c] The word-dio electric wire/cable of the present invention includes an insulating material,
Or, as both an insulator material and a sheath material, it contains 100 parts by weight or more of an oily substance, 5011 parts or more of granules with high damping effects such as lead compounds, barium sulfate, carbon black, etc. per 1 part of 100 mff of polymeric polynorbornene. It is characterized by comprising a formulation that

Polynorbornene, which is a ring-opening polymer of ethylene and cyclopentadiene, absorbs a large amount of mineral oil, naphthenic oil, and plasticizer, for example, 200 to 300% of its own weight, and has a large damping effect, making it suitable for use in buttons, etc. 100% by weight of the substance
We found that it is possible to achieve high filling levels close to 13 t according to JISK-6301 depending on the combination of these additives.
It has been found that the elasticity (coefficient of restitution) due to f- can be adjusted to 1' to 15% or less.

Furthermore, a major feature of this norbornene compound is that it exhibits rubber properties with little permanent set without losing its damping effect through sulfur-based vulcanization, radiation crosslinking, or peroxide crosslinking. It is ideal as an insulation material and sheath material for A-dio cables and cables that require high damping characteristics.

[Example] The attached drawing is a cross-sectional explanatory diagram of an audio wire, and 1
2 is an insulator, 3 is an inclusion for providing tension and flexibility, and 4 is a sheath.

Polynorbornene formulation 1 (peronisinide cross-linked type) Polynorbornene 100 parts Aromatic softening oil 150 n.

Precipitated barium sulfate 400 Petroleum resin
80 Zinc oxide
5 Stearic acid 1 Dicumyl peroxide 3 Polynorbornene combination 2 (electron beam cross-linked type) Polynorbornene
100ffl&”1 part aromatic softening oil 1
50 〃EPDM 30 〃Precipitated barium sulfate 300 〃Petroleum resin
80 Zinc oxide
5 〃Stearic acid 1 〃Conductor 1,
An audio wire was prepared using the materials shown in the table below as the insulator 2, the inclusion 3, and the sheath 4. The table shows the JISK-6301 insulation 1E and sheath for each piece.
The elastic modulus based on is also listed.

When using J5 and polynorbornene composition 1, crosslinking was performed by heating, and when polynorbornene composition 2 was used, crosslinking was performed using electron beam irradiation at 10 Mracl.

The sound of Tosa used in the audio system) ^ Is the effect better with the numerical meter a+U? There are no people, so we have no choice but to make plans based on the auditory sense of an experienced person, but the results of the auditory test show that compared to the comparative example, the sound range is wider for both 1 and 3 between the eyebrows. 3 separation is good.

■ Subtle lingering notes can be clearly heard.

■ In particular, by stringing dozens of microphone cords around the stage, the negative effects of floor vibration were completely eliminated.

Therefore, it was confirmed that the damping effect of the polynorbornene compound was clearly exhibited.

[Effects of the Invention] As explained above, the present invention provides an electric cable for audio using a polynorbornene compound with an elastic modulus of 15% or less for the insulator or for both the insulator and sheath. By reducing vibration distortion, extremely superior acoustic effects can be achieved.

[Brief explanation of the drawing]

The attached drawing is an explanatory cross-sectional view of an example of an audio wire/cable. 1: conductor, 2: insulator, 3: inclusion, 4: sheath.

Claims (1)

[Claims] (1) As an insulator material or both an insulator material and a sheath material, 100 parts by weight of high-molecular-weight polynorbornene, oily substances of 100 parts by weight or more, lead compounds, barium sulfate, carbon black, etc. have a high damping effect. An audio wire/cable comprising a compound containing 50 parts by weight or more of powder.