JPS5819817A - Laminated film for coating 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 film for covering electric wires, which is a laminated film of Hirofu, Noxy WM and plastic film.In the case of electric wire AM wrapping, it is simply coated with vinyl chloride resin etc. In many cases, VH is used in one layer, but in the case of thick wires, after applying an insulating film on the outside, further E is applied.
This insulating coating 1 is often applied with a lllt coating.
As a 1M1 film, conventionally, 9 ethylene film, 40% polyethylene film, and 74% polypropylene film have been used, but in these films, Except for polyethylene film #ia, there is almost no self-fusing property, and the heat convergence stress due to heat flux causes problems (or some% P#i, the exclusive use of applying 19 ethylene to these 074 lumens). -) After attaching the 74 lumens, a method of heat-sealing them was adopted.

However, with these methods, the adhesion between the film and the steel wire was poor (and voids were formed between the film, the chain line, and the OII, resulting in a decrease in insulation performance). As a result of intensive research into the layers, we came up with the following laminated film for covering electric wires.That is, an electric wire made from a laminate of phenoxy resin and plastic film with the following structural formula. It is a laminated film for coating.
The present invention is made by polymerizing EM1-7g of Noxy Resin Co., Ltd.'s Bis7-norm and Evitalolhydrin, and it is softened at about 100°C and can be heat-fused.

There are methods for producing a laminated film of plastic film and 7-enoxy resin, a coating method in which a phenoxy resin solution is applied to a plastic film and then dried, a method for dry laminating a plastic film and a phenoxy resin, and a method for dry laminating a plastic film and a phenoxy resin solution. There is an extrusion method in which Kyx resin is extruded and pressed onto a film, and a method in which 7.7 xy #IM is co-extruded with a certain type of plastic resin, but the method is limited to these methods. - The phenoxy layer should be applied to the plastic resin layer only on one side, but it is preferable to use the plastic resin layer to ensure complete adhesion of 1% to 1%.
t t sy y The plastic resin layer is VH Hiroa, and the Noxy resin layer Ovh is misaligned. 9P&I are both stretched.
%/het 1 If a slip property improver such as inorganic particles is added to these materials, the workability will be improved non-electrically. ・Plastic film 01111 will not be stolen by the enemy. However, when the biaxially oriented polyethylene tere-7-talate film is made from a biaxially oriented polyethylene tere-7-talate film, the workability, electrical performance, and economical efficiency are much better. In addition, the thickness of the enoxy resin layer is preferably 1 to 3 μm from the viewpoint of adhesion, economical efficiency, etc.-6 For the electric wire sheath M made of the laminated film of the present invention, first, the laminated 74 lumen produced by the above method is used. The slit width of the film is determined by the thickness of the steel wire, the thickness of the laminated film, and the stiffness of the film. If the copper wire is S+-, it is possible to attach the sK to the steel wire by narrowing the slit width. The film and copper wire are heated in the 0 process, and the film and copper wire are fused together to create an integrated electric wire. There is also a method of coating the wood and fusing it using ltO heat. In addition, when using it for a coil, etc., place the covered and electrically isolated wires next to each other.
After that, it is heated and fused to achieve a glossy and integrated finish.

In the conventional wire coating method, the adhesion between the steel wire and the coating film is poor, and the adhesion between the coating films is also poor, so the same layer naturally maintains insulation performance by preventing the infiltration of film. However, when using the laminated film for covering electric wires of the present invention, the adhesion between the wire wrapping, the film, and the film is excellent in terms of non-electrical properties, so that the intrusion of air can be prevented. t
In addition, in the case of coils, etc., it is possible to prevent the winding from collapsing, which makes it easier to work on the coils after they are assembled.

In the case of the laminated film of the present invention, the adhesion is slightly inferior to that of #i7-Noxy4IIN alone, but it improves rite properties, withstand voltage, workability, etc. due to the properties of the carrier, Pushchita Film 041. be able to.

For example, when a biaxially stretched bola ethylene tere-7 tallate film is used as a carrier, it has a higher break-up point, higher withstand voltage, and higher Young's modulus than the 7-unit resin. The gender etc. are greatly kitted out.

Hereinafter, the gloss will be further described with reference to Examples.

Example: A phenoxy resin) was dissolved in a luene-ethyl acetate mixed solvent to make a 15-weight box with a thickness of ts.
PVZ axis stretched polyethylene tereate resin was coated on both sides of 5 m by the Duffy Roll method and dried.
There were five voices. The laminated film was wrapped around several bottles. this! Wrap the Itada slit film around the copper wire in a spiral shape so that the ends overlap slightly, fuse it while passing through a hot air oven at 140℃, then cool it and roll it up. The electric wire manufactured in this manner was heated to ecs in 40℃%9SIRH.
After leaving it for oo hours, we measured the change in withstand voltage.
As shown in Table 1 (it was in good condition with virtually no deterioration).

Table 1゜ 7L-

Claims (1)

[Claims] 1. A laminate film for covering electric wires, which is made of a laminate of phenolic resin having the following structural formula and a plastic film. :L2ffX? The laminated film for covering electric wires according to claim 1, wherein the lid film is a biaxially oriented polyethylene terephthalate film. 1. The plastic film is: 74% laminated film for electric wire covering as described in Section 5.