JPS595507A - Self-adhesive insulated 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 The present invention relates to a self-adhesive insulated wire used as a wire for coils of equipment such as electrical and communication equipment.

Self-adhesive insulated wires are extremely effective in terms of labor saving and simplification in the manufacturing process of electric wire communication equipment, as well as in safety and health and environmental pollution prevention in the varnish impregnation process of equipment, so their practical application and use are encouraged. There is something remarkable about the expansion.

Such self-adhesive insulated wires have conventionally been made by appropriately combining one or more linear polymer compounds such as polyvinyl butyral resin, polyvinyl formal resin, polyamide resin, and phenoxy resin and dissolving them in an appropriate solvent. It is known to form an adhesive film by applying this resin solution directly to a conductor or by applying and baking it on an ordinary insulating film made of polyester paint or the like. Such self-adhesive insulated wires have a problem in that the abrasion resistance of the adhesive film is not sufficient compared to general R-wires having an insulating film. In particular, as the speed of winding in the single-winding process has increased in recent years, damage caused by the nozzle pulleys of five-winding machines has tended to increase, and layer shorts caused by this damage are increasing. The same is desired for the abrasion resistance of the coating.

In addition, in order to improve the heat resistance of the self-adhesive insulated wire, a crosslinking resin component such as an epoxy resin, a stabilized isocyanate resin, a phenol formaldehyde condensate, a melanin formaldehyde condensate, etc. is further mixed with the resin solution and applied. Also known are self-adhesive insulated wires that are baked into an adhesive film. However, even with this type of self-adhesive raw insulated wire, the resin in the adhesive coating is in a semi-cured state (B stage).The abrasion resistance of the adhesive coating is much higher than that of the above-mentioned electric wire It has the disadvantage of being low.

To address these shortcomings, the conventional method has been to apply a smooth lubricant that does not adversely affect the adhesion of self-adhesive insulated wires. Irritation;
This invention, which could withstand severe winding counterfeiting, was abandoned due to personal circumstances; even under severe winding conditions, the adhesive film was partially removed. The purpose is to provide a self-insulating wire that does not cause damage to the insulation film and can reliably prevent deterioration of edge characteristics and layer shorts. The present invention is characterized in that a film made of a wax-based lubricant having a thickness of 5 μm or less is provided between the insulating film and the adhesive film. Figure 5 shows -90 of the self-adhesive insulated wire of this invention. Group number I in Figure 5 indicates steel, steel alloy, aluminum,
Gold Il such as aluminum alloy! It is a conductor made of striae. An insulating film 2 is provided on the surface of the conductor 1. The insulating film 2 can be made of general oil-based enamel paint, formal paint, polyester paint, polyurethane paint, or polyurethane paint.
1. The conductor 1 is coated with an insulating paint such as imide coating or polyamide-imide paint by a well-known enamel baking method, and the film thickness is approximately 30 mm.
The surface of the insulating film 2, which has a thickness of ~60 μm, is coated with a film 3 made of a Fuchs-based 7-reducing agent.
It is formed by applying a wax-based lubricant such as paraffin wax, shellac, or low-molecular-weight bone fiber 1) to a film thickness of 5 μm or less, preferably V'i2 titrn or less. The method for applying this anti-friction agent is 2. For example, the conductor 1 provided with the insulating film 2 is immersed while running in a molten tin bath in which Torera anti-friction agent is heated and melted, and the thickness of the film is determined using a die. No matter which method 1 is used, the thickness of the coating 3 exceeds 5 μm, and the self-adhesive properties of the wire are maintained at high temperatures. Characteristics deteriorate, causing inconvenience.

On the surface of the film 3 made of wax T, anti-friction agent,
An adhesive film 4 is formed. This adhesive film 4 consists of fenoquine resin, polyvinyl butyral resin, and resin material.
Synthesize one or more Vi2ffi molecular compounds such as Hi'niruo9mar resin, Boria'mid resin, etc. (In the case of Bo11 Vinyl A formal resin, it cannot be used alone because of its poor adhesive properties. (Do not use.) To improve heat resistance, add one finger of epoxy, stabilized isocyanate resin, urea formaldehyde condensate, melamine formaldehyde condensate, acetoguanamine formaldehyde condensate.

Aniline formaldehyde condensate, benzoguanamine formaldehyde condensate, amine-based condensates obtained by modifying these condensates with alcohol. Metal bars of phenols such as phenol, cresol, and coconut lenol and aldehydes such as formaldehyde, acetaldehyde, and furfural>p-
Use a type of phenolic resin such as vinyl phenol 2
It is formed by adding and mixing two or more species, then coating and baking five tree liquids dissolved in an appropriate solvent. Generally, when trying to apply and bake the above resin liquid onto a wax-based film, the wax-based film repels the resin liquid and a uniform film cannot be obtained, and interfacial peeling occurs between the wax-based film and the resin film. However, by specifying the viscosity of the resin liquid and the thickness of the adhesive film 4, the above problems can be solved. I understand.

That is, when the viscosity of the resin liquid is set to 5 voids or more, preferably 10 voids or more (all viscosities are measured at 30° C.), an adhesive film 4 that is uniform and has a good appearance can be obtained. The thickness of the adhesive film 4 should be 5 μm or more, preferably 1
If it is 0 μm or more, when the resulting self-adhesive insulated wire is bonded, the adhesive film 4 will completely melt and enclose the wire,
Decrease in adhesion can be minimized.

In the self-adhesive insulated wire 5 having such a structure, the lower layer 3 of the adhesive film 4 is made of a wax-based lubricant, even if it is rubbed by the nozzle, pulley, etc. of the first winding machine during winding. Therefore, the adhesive film 4 is only partially rubbed off, and the insulating film 2
There is no damage to the surface, therefore the insulation properties do not deteriorate, and it is possible to reliably prevent layer shorts when used as a coil or the like.

Hereinafter, the present invention will be explained in detail by showing examples.

[Example 1] Insulation film thickness 30 obtained by baking enamel on a copper wire with a diameter of 1
A wax-based lubricant (
A film consisting of TEC-9601 (manufactured by Tsukushiba Chemical Co., Ltd.) was applied to a thickness of 0.5 μm 1, and then 11 parts by weight of phenoxy resin and 8 parts by weight of a 50% solution of alcohol-modified melamine formaldehyde condensate were added to cyclo. xanone 8
Self-adhesive insulation is created by applying and baking a resin solution with a viscosity of 0.5 poise dissolved in 1 part by weight to a film thickness of 15 μm! , created a line. About this electric wire Appearance, JIS
- Thermal softening temperature, reciprocating wear, and adhesive strength at room temperature and 120° C. when forming a coil were measured using C.3003, and the results are shown in the table together with other examples and comparative examples.

[Example 2] Phenoxy resin 1 was applied to a Bo 11 esterimide standard provided with a film made of a wax-based lubricant similar to Example 1.
8 parts by weight, 14 parts by weight of a 50% solution of an alcohol-modified melamine formaldehyde condensate dissolved in 68 parts by weight of cyclohexanone to form a resin solution with a viscosity of 5 voids and a film thickness of 15%.
It was coated and baked to a thickness of μm. Example 1 for this electric wire
A similar test was conducted.

[Example 3] On a polyesterimide wire provided with a film made of the same wax-based lubricant as in Example 1, 22 parts by weight of phenoxy tree and a 50% solution of alcohol-modified melamine-formaldehyde condensate were added to 62 parts by weight of cyclohexanone. A dissolved resin liquid having a viscosity of 12 poise was applied and baked to a film thickness of 15 μm. This electric wire was subjected to the same test as in Example 1.

[Example 4] Bottle provided with a film made of wax-based lubricant similar to Example 1 1) Apply the same resin solution as in Example 3 onto the esterimide wire so that the film thickness is 10 μm. , burned. The same test as in Example 1 was conducted on this straight line.

[Example 5] An electric wire was produced in exactly the same manner as in Example 4 except that the thickness of the adhesive film was 5 μm, and the same tests as in Example 1 were conducted.

[Implementation flFIJ6:] A 2 μm thick film of wax-based lubricant (TEC-9601 manufactured by Toshiba Chemical) was placed on the same polyesterimide wire as in Example 1, and the same resin liquid as in Example 3 was applied to this. was coated and baked to a film thickness of 15 μm, and the same test as in Example 1 was conducted on this wire.

[Example 7] In Example 6, a film made of a wax-based lubricant was
An electric wire was manufactured in the same manner except that the thickness was μm, and the same test as in Example 1 was conducted.

〔implementation? '! +81 Viscosity 12 when 30 parts by weight of phenoxy tree was dissolved in 60 parts by weight of cyclohexanone on a polyesterimide wire provided with a film made of a wax-based lubricant similar to Example 1.
Poise resin liquid was applied and baked. Example 1 for this electric wire
A similar test was conducted.

[Example 9] 71.4 parts by weight of polyvinyl acetal resin, 28.6 parts by weight of phenoxy resin, and alcohol-modified melamine formaldehyde were placed on a polyesterimide wire provided with a film made of the same wax-based lubricant as in Example FJ 1. 21.4 parts by weight of a 50% solution of condensate.

A resin liquid with a viscosity of 20 voids prepared by dissolving 73.4 parts by weight of phenol formaldehyde condensate with 556.0 parts by weight of cyclohexanone and 71.7 parts by weight of furfural was applied to a thickness of 15 μm and baked to produce an electric wire. did. A test similar to Example 1 was conducted.

[Comparative Example 1] The resin liquid used in Example 3 was applied onto the same polyesterimide wire as in Example so that the film thickness was 15 μm, and baked. This electric wire was subjected to the same test as in Example 1.

[Comparative Example 2] An electric wire was manufactured in the same manner as in Comparative Example 1 except that the thickness of the adhesive film was changed to 1 μm.
I'm thinking of doing a similar test.

[Comparative Example 3] An electric wire was produced in exactly the same manner as in Comparative Example 1'F- except that the thickness of the adhesive film was changed to 5 μm], and the same tests as in Example 1 were conducted.

[Comparative Example 4] An electric wire was manufactured by coating the same polyester imide wire as in Example 1 with the resin liquid used in Example 8 so that the film thickness was 15 μm, and the same test as in Example 1 was carried out. I did it.

[Comparative Example 5] An electric wire was manufactured by coating and baking on the same polyesterimide wire as in Example 1, and the same test as in Example 1 was conducted.

*I According to JIS-C-300310, IK* 2
JIS-C-3on3 13. j,, 1.
+3 according to (2) The electric wire obtained in the example and comparative example has a diameter of 6
．． A coil was created by tightly winding the coil around a 4u mantle, and the coil was heated at 180°C for 30 minutes.
As is clear from the table that shows the transverse rupture force when bent (under ζ), the reciprocating abrasion openings of the electric wire of the example are much higher than those of the comparative example, and the abrasion resistance is There are clearly visible cavities, and it can be seen that even though a film made of a wax-based reducing agent is provided, it is hardly possible to lower the softening temperature and adhesive strength of the sheet.

1. As explained above, the self-adhesive insulation of this invention↑
The wire has a film made of wax-based lubricant between the insulating film and the adhesive film, so even if it is rubbed by the winding machine's brie, nozzle, etc. when checking the wire, the insulating film will remain intact. The insulation properties can be maintained without any damage, and when it is made into a coil, layer/iodine etc. can be completely prevented, and properties such as heat resistance and adhesive strength will not deteriorate. Therefore, it will be able to withstand use even with the harsh winding of 4SfN near B5.

[Brief explanation of the drawing]

The drawing is a sectional view showing an example of this self-adhesive insulated wire. 1 conductor, 2 insulating film, 3 film made of wax-based anti-friction agent, 4 adhesive film, 5 self-adhesive insulating wire Applicant: Fujikura Electric Cable Co., Ltd. 7. T': 1, Agent: Patent Attorney Tadashi Shiga Ninoshiro Mi7, - ”.゛＼２〕ri

Claims (1)

[Claims] In a self-adhesive insulated wire in which an adhesive film is provided on an insulating film of an insulated wire, a film made of a wax-based lubricant having a thickness of 5 μm or less is provided between the insulating film and the adhesive film. A self-adhesive insulated wire featuring: