JPH06215636A - Self-lubricating enamel wire - Google Patents

Abstract

PURPOSE:To provide an enamel wire which is much better in the strength of an enamel coating film and has self-lubricating quality by applying to the surface of a conductor a coating material in which a specific thermosetting fluorine resin of a predetermined part by weight is added to a resin component of a predetermined part by weight of an insulating coating material and then baking it. CONSTITUTION:This self-lubricating enamel wire is constituted by applying to the surface of a conductor directly or through other insulating materials a coating material in which a thermosetting fluorine resin of 0.1 to 50 parts by weight composed of polyhexaoro-1.3-butadiene represented by a formula I {(n) and (m) are each an integer of 2 or more} is added to a resin component of 100 parts by weight and then baking it. To an insulating coating material to be used, polyimide (class C), polyimide amide (class H to C), polyesterimide (class F, class H), polyester (class B to F), polyurethane (class E, class B), epoxy (class B), formal (class E to A) and nylon (class Y) are applicable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-lubricating enamel wire, and more particularly to a self-lubricating enamel wire having improved high-speed winding property by improving the sliding property of the enamel coating.

[0002]

2. Description of the Related Art In recent years, enamel wire has been used to reduce the size of electrical equipment.
In order to speed up the coil winding work and reduce the coil failure rate, it is desired to have a high enamel film strength, and in particular, the development of an enamel wire excellent in mechanical winding property at high speed is demanded. .

As a method of improving the mechanical winding property of the enamel wire, a is used to form a thin outer diameter of the wire, b is used to increase the flexibility of the conductor, c is used to improve the strength of the enamel coating, and enamel wire is used. There is a method of giving slipperiness (self-lubricating property), but as a method of improving the strength of the enamel film, a method of baking nylon or polyamide-imide resin on the upper layer of the enamel film is generally used.

As another method for improving the strength of the coating, an insulated wire having improved wear resistance by coating a resin composition containing a specific fluorine resin is disclosed in Japanese Patent Laid-Open No. 1-33.
No. 3810.

Such a method is effective as a method for increasing the strength of the coating of the enamel wire, but on the other hand, it is not reliable enough to speed up the coil winding work and reduce coil scratches. Low molecular weight polyolefin (low molecular weight polyethylene, low molecular weight polypropylene)
There is a method of improving the sliding property against friction by adding self-lubricating property to the enamel wire.

[0006]

However, the conventional self-lubricating enamel wire has a poor dispersion stability of the low molecular weight polyolefin in the paint, and thus the high speed of the enamel wire which is becoming severe in recent years. There is a problem that the self-lubricating property with respect to the mechanical winding property is no longer sufficient in terms of performance. Therefore, an object of the present invention is to provide a self-lubricating enamel wire having more excellent enamel coating strength and self-lubricating property.

[0007]

In order to provide a better enamel film and self-lubricating property, the present invention is a thermosetting resin comprising polyhexafluoro-1.3-butadiene in 100 parts by weight of a resin component of an insulating paint. Another object of the present invention is to provide a self-lubricating enamel wire in which a coating material containing a fluorine-based resin is applied on a conductor directly or through another insulating material and baked.

That is, the self-lubricating enamel wire of the present invention is

[Chemical 5] (N and m are integers greater than or equal to 2), a thermosetting fluororesin made of polyhexafluoro-1.3-butadiene was used.
1 to 50 parts by weight of paint added to 100 parts by weight of resin component of the insulating paint, or

[Chemical 6] (N and m are integers of 1 or more), a fluororesin having a composition of 0.
5 to 50 parts by weight of the paint added to 100 parts by weight of the resin component of the insulating paint, or

[Chemical 7] A coating obtained by adding 0.5 to 50 parts by weight of a fluorine-based resin having a structure of (n is an integer of 1 or more) to 100 parts by weight of the resin content of the insulating coating, or

[Chemical 8] (N and m are integers of 1 or more), a fluororesin having a composition of 0.
5 to 50 parts by weight of the coating material added to 100 parts by weight of the resin component of the insulating coating material is applied directly onto the conductor or through another insulating material and baked.

As the insulating coating used, polyimide (C type), polyamide imide (H to C type), polyester imide (F type and H type), polyester (B to F type),
Polyurethane (type E, type B), epoxy (type B), formal (types A to A), nylon (type Y) and the like can be applied.

[0010]

Example 1 The self-lubricating enamel wire of the present invention will be described in detail below.

The electric wire used in this embodiment has a conductor diameter of 1.
A polyamideimide coating of 3 μm and a nylon coating of 1.5 μm were baked on the upper layer of an ester imide wire (hereinafter referred to as EIW) having an enamel coating of 0 mm and a film thickness of 35 μm. HI-406-30 (nonvolatile content 30%) manufactured by Hitachi Chemical Co., Ltd. was used for the polyamide-imide paint, and N-15 was prepared by dissolving Toray CM3001N (nylon 66) in cresol / xylene (70/30) for the nylon paint.
(Nonvolatile content 15%) was used.

Based on the above-mentioned electric wires, test wires 1 to 9 having different paints to be baked on the upper layer of EIW were formed.
The composition of each test line is shown below.

[Test line 1] For HI-406-30 paint,
Thermosetting fluororesin (hereinafter referred to as TSHFBD) of 10% dispersion of toluene with a degree of polymerization of n = 10 was used in a resin ratio of 1
The paint made by adding so that it became 00:03
The upper layer was formed by baking with a thickness of 3 μm.

[Test Lines 2, 3, 4 and 5] With the same structure as Test Line 1, the amount of THFBD added was 0.1 to 50.
The paints set in parts by weight were each baked to form an upper layer of EIW.

[Test Line 6] TSHF was added to the above-mentioned N-15.
A paint prepared by adding BD so that the resin ratio was 100: 3 was formed by baking as a top layer of EIW in a thickness of 1.5 μm.

[Test lines 7, 8 and 9] A coating having the same structure as the test line 6 and having an addition amount of TSHFBD set to 0.1 to 50 parts by weight is formed by baking as an upper layer of EIW. did.

Comparative Examples 1 to 8 having different paints baked on the upper layer of EIW were formed for comparison with the test line. The composition of each comparative example is shown below.

[Comparative Examples 1, 2 and 3] With the same constitution as that of the test line 1, the amount of THFBD added was 0.05, 55, and 6.
The paints set at 0 parts by weight were each baked to form an upper layer of EIW.

[Comparative Examples 4, 5 and 6] The above-mentioned N-15
1. A coating material in which the addition amount of TSHFBD was set to 0.05, 55 and 60 parts by weight was used as the upper layer of EIW.
It was formed by baking with a thickness of 5 μm.

[Comparative Example 7] HI-406-30 paint,
A paint prepared by adding low molecular weight polyethylene (10% xylene solution) at a resin ratio of 100: 3,
The upper layer of EIW was formed by baking with a thickness of 3 μm.

[Comparative Example 8] Low molecular weight polyethylene (10% xylene solution) was added to the above N-15 at a resin ratio of 10%.
The paint prepared by adding so as to be 0: 3 was formed by baking as a top layer of EIW in a thickness of 1.5 μm.

Regarding the enamel wire characteristics (appearance, coefficient of static friction, number of reciprocating abrasions) of this test wire and comparative example, JIS
Table 1 shows the results of evaluation based on -C3003. In the table, ◯ means “good”, Δ means “slightly inferior”, and x means “inferior”.

[Table 1] From the results shown in Table 1, the test line obtained by adding THFBD to the polyamide-imide coating and the nylon coating and applying it to the surface of the EIW and baking it showed that the low friction molecular weight and the number of reciprocating abrasions were the same as those of the conventional test line. It has excellent properties compared to paints.

In the self-lubricating enamel wire of the present invention described above, the thermosetting fluorocarbon resin added to the coating material is
Since it has a double bond in the molecule, the following crosslinking reaction occurs during baking of the enamel wire.

[Chemical 9] This crosslinking reaction improves the wear resistance and chemical resistance of the enamel coating. Further, the addition amount of the fluororesin is 0.
If it is less than 5 parts by weight, the slipperiness is not sufficient, and
If the amount is more than 1 part by weight, the dispersion stability in the coating composition is lowered even if slippage is obtained.

[0024]

[Example 2] As in Example 1, 3 was formed on the upper layer of the EIW having an enamel film having a conductor diameter of 1.0 mm and a film thickness of 35 µm.
A polyamide-imide paint having a thickness of μm and a nylon paint having a thickness of 1.5 μm are baked. The same polyamide-imide paint and nylon paint as in Example 1 were used.

Based on the above-mentioned electric wires, test wires 1 to 11 having different paints to be baked on the upper layer of EIW were formed. The composition of each test line is shown below. The fluorine-based resin is TAF-L manufactured by Hitachi Chemical Polymer Co., Ltd.
UB (P6) (n = 14, m = 1 in chemical formula 2) and TAF-LUB (P4) (n = 14 in chemical formula 3) were used.

[Test Line 1] For HI-406-30 paint,
TAF-L of 20% solution of N-methyl-2-pyrrolidone
A coating material prepared by adding UB (P4) at a resin ratio of 100: 3 was baked as an upper layer of EIW in a thickness of 3 μm.

[Test line 2] Using a 20% solution of N-methyl-2-pyrrolidone, TAF-LUB (P6), a paint prepared in the same configuration as in test line 1 was baked as an upper layer of EIW. Formed.

[Test Lines 3, 4, 5 and 6] A paint having the same structure as the test line and having the addition amount of TAF-LUB (P4) set to 0.5 to 50 parts by weight is used. E
It was formed by baking as an upper layer of IW.

[Test Line 7] TAF-LUB of 10% solution of cresol / xylene = 7/3 was added to N-15.
A coating material prepared by adding (P4) to a resin ratio of 100: 3 was formed by baking as a top layer of EIW in a thickness of 1.5 μm.

[Test line 8] TAF-LUB of 10% solution of cresol / xylene = 7/3 was added to N-15.
A coating material prepared by adding (P6) to a resin ratio of 100: 3 was formed by baking as an upper layer of EIW in a thickness of 1.5 μm.

[Test lines 9, 10 and 11] The above-mentioned N-
The coating composition in which the addition amount of TAF-LUB (P4) in a 10% solution of cresol / xylene = 7/3 was set to 0.5 to 50 parts by weight as No. 15 was baked at a thickness of 1.5 μm as an upper layer of EIW. Formed.

Also, Comparative Examples 1 to 8 having different paints baked on the upper layer of EIW were formed for comparison with the test line. The composition of each comparative example is shown below.

[Comparative Examples 1, 2 and 3] A coating material having the same structure as that of the test line 1 and the addition amount of TAF-LUB (P4) set to 0.1, 55 and 60 parts by weight, respectively, was used. It is formed by baking as an upper layer of EIW.

[Comparative Examples 4, 5 and 6] The above-mentioned N-15
The addition amount of the above-mentioned TAF-LUB (P4) to 0.1,
The paints set at 55 and 60 parts by weight are formed as upper layers of EIW by baking at a thickness of 1.5 μm.

[Comparative Example 7] A HI-406-30 paint was prepared.
A paint prepared by adding low molecular weight polyethylene (10% xylene solution) at a resin ratio of 100: 3,
The upper layer of the EIW is formed by baking with a thickness of 3 μm.

[Comparative Example 8] A low molecular weight polyethylene (10% xylene solution) was added to the above-mentioned N-15 at a resin ratio of 10%.
The paint prepared by adding so as to be 0: 3 is formed by baking it as an upper layer of EIW in a thickness of 1.5 μm.

With respect to this test line and the comparative example, the dispersion stability of the paint and the enameled wire characteristics (appearance, static friction coefficient,
Table 2 shows the results of evaluation based on JIS-C3003 regarding the number of reciprocating wears.

[Table 2] From the results of Table 2, TAF-LUB (P4) and TAF
-The test line obtained by adding LUB (P6) to a polyamide-imide coating and a nylon coating and applying it to the surface of an EIW and baking it is a low-molecular-weight polyethylene for the dispersion stability of the coating, the coefficient of static friction, and the number of reciprocating abrasions. It shows superior properties compared to the conventional paints added.

[0038]

Third Embodiment Similar to the first and second embodiments, the conductor diameter is 1.0
3 mm of polyamide-imide paint and 1.5 μm of nylon paint were baked on the upper layer of EIW having an enamel film having a thickness of 35 μm and a film thickness of 35 μm. The polyamide-imide paint and the nylon paint used were the same as in Examples 1 and 2.

Based on the above-mentioned electric wires, test wires 1 to 9 having different paints to be baked on the upper layer of EIW were formed.
The composition of each test line is shown below. Regarding the fluororesin, Hitachi Chemical Polymer Co., Ltd. TAF-LUB
(S-2) (n = 14, m = 2 in Chemical formula 4) was used.

[Test line 1] For HI-406-30 paint,
TAF-L of 20% solution of N-methyl-2-pyrrolidone
A coating material prepared by adding UB (S-2) at a resin ratio of 100: 3 is formed by baking as a top layer of EIW in a thickness of 3 μm.

[Test lines 2, 3, 4 and 5] A paint having the same structure as the test line 1 and containing TAF-LUB (S-2) added in an amount of 0.5 to 50 parts by weight was used. EI
It is formed by baking as an upper layer of W.

[Test line 6] TAF-LUB of 10% solution of cresol / xylene = 7/3 was added to N-15.
A coating material prepared by adding (S-2) to a resin ratio of 100: 3 is baked as an upper layer of EIW in a thickness of 1.5 μm.

[Test lines 7, 8 and 9] N-15 described above
And 10% solution of cresol / xylene = 7/3 TA
A coating material in which the amount of F-LUB (S-2) added is set to 0.5 to 50 parts by weight is formed as an upper layer of EIW by baking at a thickness of 1.5 μm.

Further, Comparative Examples 1 to 8 having different paints baked on the upper layer of EIW were formed for comparison with the test line. The composition of each comparative example is shown below.

[Comparative Examples 1, 2 and 3] A paint having the same structure as that of the test line 1 and having the addition amount of TAF-LUB (S-2) set to 0.1, 55 and 60 parts by weight was prepared. , And is formed by baking as an upper layer of EIW.

[Comparative Examples 4, 5 and 6] The above-mentioned N-15
And the addition amount of TAF-LUB (S-2) described above to 0.
The paint set with 1,55,60 parts by weight is used for EI
The upper layer of W is formed by baking with a thickness of 1.5 μm.

[Comparative Example 7] A HI-406-30 paint was prepared.
A paint prepared by adding low molecular weight polyethylene (10% xylene solution) at a resin ratio of 100: 3,
The upper layer of the EIW is formed by baking with a thickness of 3 μm.

[Comparative Example 8] Low molecular weight polyethylene (10% xylene solution) was added to the above N-15 at a resin ratio of 10%.
The paint prepared by adding so as to be 0: 3 is formed by baking it as an upper layer of EIW in a thickness of 1.5 μm.

With respect to this test line and the comparative example, the dispersion stability of the coating material and the enamel wire characteristics (appearance, static friction coefficient,
Table 3 shows the results of evaluation based on JIS-C3003 regarding the number of reciprocating wears. In the table, ○ is “good”,
Δ indicates “slightly inferior”, and × indicates “inferior”.

[Table 3] From the results shown in Table 3, the test line obtained by adding TAF-LUB (S-2) to the polyamideimide coating and the nylon coating and applying it to the surface of the EIW and baking it was found that the dispersion stability of the coating, the coefficient of static friction and reciprocal wear. All of the numbers of times show excellent characteristics as compared with the conventional coating material to which low molecular weight polyethylene is added.

[0050]

As described above, according to the self-lubricating enamel wire of the present invention, 100 parts by weight of the resin component of the insulating paint is a thermosetting resin composed of polyhexafluoro-1.3-butadiene, or a fluororesin. Since the coating material added with is applied directly to the conductor or through another insulating material and baked, a more excellent enamel film and self-lubricating property can be imparted.

Front page continued (72) Inventor Sadami Itonaga 4-10-1, Kawajiri-cho, Hitachi-shi, Ibaraki Hitachi Cable Denki Co., Ltd. Toyoura factory (72) Inventor Hideki Asano 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Hitachi Cable Co., Ltd. Power System Laboratory

Claims (4)

[Claims] 1. A thermosetting fluororesin comprising polyhexafluoro-1.3-butadiene in 100 parts by weight of a resin component of an insulating coating. (N and m are integers of 2 or more) 0.1 to 50 parts by weight of a coating material is applied to a conductor directly or through another insulating material and baked, which is self-lubricating. Enamel wire. 2. A fluororesin based on 100 parts by weight of the resin component of the insulating coating. (N and m are integers of 1 or more) 0.5 to 50 parts by weight of a coating material is applied to a conductor directly or through another insulating material and baked, which is self-lubricating. Enamel wire. 3. A fluororesin is added to 100 parts by weight of the resin component of the insulating paint. A self-lubricating enamel wire, characterized in that a paint to which 0.5 to 50 parts by weight of (n is an integer of 1 or more) is added and applied directly to a conductor or through another insulator and baked. . 4. A fluororesin is added to 100 parts by weight of the resin component of the insulating paint. (N and m are integers of 1 or more) 0.5 to 50 parts by weight of a coating material is applied to a conductor directly or through another insulating material and baked, which is self-lubricating. Enamel wire.